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nfsd4: fix decoding of compounds across page boundaries
[deliverable/linux.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"
3d733711 56#include "netns.h"
2ca72e17 57
18032ca0
DQ		 58#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
59#include <linux/security.h>
60#endif
61
62
1da177e4
LT		 63#define NFSDDBG_FACILITY NFSDDBG_XDR
64
42ca0993
BF		 65/*
66 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
67 * directory in order to indicate to the client that a filesystem boundary is present
68 * We use a fixed fsid for a referral
69 */
70#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
71#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
72
b37ad28b 73static __be32
a36b1725 74check_filename(char *str, int len)
1da177e4
LT		 75{
76 int i;
77
78 if (len == 0)
79 return nfserr_inval;
80 if (isdotent(str, len))
a36b1725 81 return nfserr_badname;
1da177e4
LT		 82 for (i = 0; i < len; i++)
83 if (str[i] == '/')
a36b1725 84 return nfserr_badname;
1da177e4
LT		 85 return 0;
86}
87
1da177e4 88#define DECODE_HEAD \
2ebbc012 89 __be32 *p; \
b37ad28b 90 __be32 status
1da177e4
LT		 91#define DECODE_TAIL \
92 status = 0; \
93out: \
94 return status; \
95xdr_error: \
817cb9d4
CL		 96 dprintk("NFSD: xdr error (%s:%d)\n", \
97 __FILE__, __LINE__); \
1da177e4
LT		 98 status = nfserr_bad_xdr; \
99 goto out
100
101#define READ32(x) (x) = ntohl(*p++)
102#define READ64(x) do { \
103 (x) = (u64)ntohl(*p++) << 32; \
104 (x) |= ntohl(*p++); \
105} while (0)
106#define READTIME(x) do { \
107 p++; \
108 (x) = ntohl(*p++); \
109 p++; \
110} while (0)
111#define READMEM(x,nbytes) do { \
112 x = (char *)p; \
113 p += XDR_QUADLEN(nbytes); \
114} while (0)
115#define SAVEMEM(x,nbytes) do { \
116 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
117 savemem(argp, p, nbytes) : \
118 (char *)p)) { \
817cb9d4
CL		 119 dprintk("NFSD: xdr error (%s:%d)\n", \
120 __FILE__, __LINE__); \
1da177e4
LT		 121 goto xdr_error; \
122 } \
123 p += XDR_QUADLEN(nbytes); \
124} while (0)
125#define COPYMEM(x,nbytes) do { \
126 memcpy((x), p, nbytes); \
127 p += XDR_QUADLEN(nbytes); \
128} while (0)
129
130/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
131#define READ_BUF(nbytes) do { \
132 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
133 p = argp->p; \
134 argp->p += XDR_QUADLEN(nbytes); \
135 } else if (!(p = read_buf(argp, nbytes))) { \
817cb9d4
CL		 136 dprintk("NFSD: xdr error (%s:%d)\n", \
137 __FILE__, __LINE__); \
1da177e4
LT		 138 goto xdr_error; \
139 } \
140} while (0)
141
ca2a05aa 142static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
1da177e4
LT		 143{
144 /* We want more bytes than seem to be available.
145 * Maybe we need a new page, maybe we have just run out
146 */
ca2a05aa 147 unsigned int avail = (char *)argp->end - (char *)argp->p;
2ebbc012 148 __be32 *p;
1da177e4
LT		 149 if (avail + argp->pagelen < nbytes)
150 return NULL;
151 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
152 return NULL;
153 /* ok, we can do it with the current plus the next page */
154 if (nbytes <= sizeof(argp->tmp))
155 p = argp->tmp;
156 else {
f99d49ad 157 kfree(argp->tmpp);
1da177e4
LT		 158 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
159 if (!p)
160 return NULL;
161
162 }
ca2a05aa
BF		 163 /*
164 * The following memcpy is safe because read_buf is always
165 * called with nbytes > avail, and the two cases above both
166 * guarantee p points to at least nbytes bytes.
167 */
1da177e4
LT		 168 memcpy(p, argp->p, avail);
169 /* step to next page */
1da177e4 170 argp->pagelist++;
24750082 171 argp->p = page_address(argp->pagelist[0]);
1da177e4 172 if (argp->pagelen < PAGE_SIZE) {
2bc3c117 173 argp->end = argp->p + (argp->pagelen>>2);
1da177e4
LT		 174 argp->pagelen = 0;
175 } else {
2bc3c117 176 argp->end = argp->p + (PAGE_SIZE>>2);
1da177e4
LT		 177 argp->pagelen -= PAGE_SIZE;
178 }
179 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
180 argp->p += XDR_QUADLEN(nbytes - avail);
181 return p;
182}
183
60adfc50
AA		 184static int zero_clientid(clientid_t *clid)
185{
186 return (clid->cl_boot == 0) && (clid->cl_id == 0);
187}
188
1da177e4
LT		 189static int
190defer_free(struct nfsd4_compoundargs *argp,
191 void (*release)(const void *), void *p)
192{
193 struct tmpbuf *tb;
194
195 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
196 if (!tb)
197 return -ENOMEM;
198 tb->buf = p;
199 tb->release = release;
200 tb->next = argp->to_free;
201 argp->to_free = tb;
202 return 0;
203}
204
2ebbc012 205static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
1da177e4 206{
1da177e4 207 if (p == argp->tmp) {
67114fe6 208 p = kmemdup(argp->tmp, nbytes, GFP_KERNEL);
a4db5fe5
BF		 209 if (!p)
210 return NULL;
1da177e4 211 } else {
73dff8be 212 BUG_ON(p != argp->tmpp);
1da177e4
LT		 213 argp->tmpp = NULL;
214 }
215 if (defer_free(argp, kfree, p)) {
a4db5fe5 216 kfree(p);
1da177e4
LT		 217 return NULL;
218 } else
219 return (char *)p;
220}
221
b37ad28b 222static __be32
1da177e4
LT		 223nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
224{
225 u32 bmlen;
226 DECODE_HEAD;
227
228 bmval[0] = 0;
229 bmval[1] = 0;
7e705706 230 bmval[2] = 0;
1da177e4
LT		 231
232 READ_BUF(4);
233 READ32(bmlen);
234 if (bmlen > 1000)
235 goto xdr_error;
236
237 READ_BUF(bmlen << 2);
238 if (bmlen > 0)
239 READ32(bmval[0]);
240 if (bmlen > 1)
241 READ32(bmval[1]);
7e705706
AA		 242 if (bmlen > 2)
243 READ32(bmval[2]);
1da177e4
LT		 244
245 DECODE_TAIL;
246}
247
b37ad28b 248static __be32
3c8e0316 249nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
18032ca0
DQ		 250 struct iattr *iattr, struct nfs4_acl **acl,
251 struct xdr_netobj *label)
1da177e4
LT		 252{
253 int expected_len, len = 0;
254 u32 dummy32;
255 char *buf;
b8dd7b9a 256 int host_err;
1da177e4
LT		 257
258 DECODE_HEAD;
259 iattr->ia_valid = 0;
260 if ((status = nfsd4_decode_bitmap(argp, bmval)))
261 return status;
262
1da177e4
LT		 263 READ_BUF(4);
264 READ32(expected_len);
265
266 if (bmval[0] & FATTR4_WORD0_SIZE) {
267 READ_BUF(8);
268 len += 8;
269 READ64(iattr->ia_size);
270 iattr->ia_valid |= ATTR_SIZE;
271 }
272 if (bmval[0] & FATTR4_WORD0_ACL) {
64a817cf 273 u32 nace;
28e05dd8 274 struct nfs4_ace *ace;
1da177e4
LT		 275
276 READ_BUF(4); len += 4;
277 READ32(nace);
278
28e05dd8
BF		 279 if (nace > NFS4_ACL_MAX)
280 return nfserr_resource;
281
282 *acl = nfs4_acl_new(nace);
1da177e4 283 if (*acl == NULL) {
b8dd7b9a 284 host_err = -ENOMEM;
1da177e4
LT		 285 goto out_nfserr;
286 }
28e05dd8 287 defer_free(argp, kfree, *acl);
1da177e4 288
28e05dd8
BF		 289 (*acl)->naces = nace;
290 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
1da177e4 291 READ_BUF(16); len += 16;
28e05dd8
BF		 292 READ32(ace->type);
293 READ32(ace->flag);
294 READ32(ace->access_mask);
1da177e4
LT		 295 READ32(dummy32);
296 READ_BUF(dummy32);
297 len += XDR_QUADLEN(dummy32) << 2;
298 READMEM(buf, dummy32);
28e05dd8 299 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
3c726023 300 status = nfs_ok;
28e05dd8 301 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ab8e4aee 302 ;
28e05dd8 303 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
3c726023 304 status = nfsd_map_name_to_gid(argp->rqstp,
ab8e4aee 305 buf, dummy32, &ace->who_gid);
1da177e4 306 else
3c726023 307 status = nfsd_map_name_to_uid(argp->rqstp,
ab8e4aee 308 buf, dummy32, &ace->who_uid);
3c726023
BF		 309 if (status)
310 return status;
1da177e4
LT		 311 }
312 } else
313 *acl = NULL;
314 if (bmval[1] & FATTR4_WORD1_MODE) {
315 READ_BUF(4);
316 len += 4;
317 READ32(iattr->ia_mode);
318 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
319 iattr->ia_valid |= ATTR_MODE;
320 }
321 if (bmval[1] & FATTR4_WORD1_OWNER) {
322 READ_BUF(4);
323 len += 4;
324 READ32(dummy32);
325 READ_BUF(dummy32);
326 len += (XDR_QUADLEN(dummy32) << 2);
327 READMEM(buf, dummy32);
47c85291
N		 328 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
329 return status;
1da177e4
LT		 330 iattr->ia_valid |= ATTR_UID;
331 }
332 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
333 READ_BUF(4);
334 len += 4;
335 READ32(dummy32);
336 READ_BUF(dummy32);
337 len += (XDR_QUADLEN(dummy32) << 2);
338 READMEM(buf, dummy32);
47c85291
N		 339 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
340 return status;
1da177e4
LT		 341 iattr->ia_valid |= ATTR_GID;
342 }
343 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
344 READ_BUF(4);
345 len += 4;
346 READ32(dummy32);
347 switch (dummy32) {
348 case NFS4_SET_TO_CLIENT_TIME:
349 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
350 all 32 bits of 'nseconds'. */
351 READ_BUF(12);
352 len += 12;
bf8d9097 353 READ64(iattr->ia_atime.tv_sec);
1da177e4
LT		 354 READ32(iattr->ia_atime.tv_nsec);
355 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
356 return nfserr_inval;
357 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
358 break;
359 case NFS4_SET_TO_SERVER_TIME:
360 iattr->ia_valid |= ATTR_ATIME;
361 break;
362 default:
363 goto xdr_error;
364 }
365 }
1da177e4
LT		 366 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
367 READ_BUF(4);
368 len += 4;
369 READ32(dummy32);
370 switch (dummy32) {
371 case NFS4_SET_TO_CLIENT_TIME:
372 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
373 all 32 bits of 'nseconds'. */
374 READ_BUF(12);
375 len += 12;
bf8d9097 376 READ64(iattr->ia_mtime.tv_sec);
1da177e4
LT		 377 READ32(iattr->ia_mtime.tv_nsec);
378 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
379 return nfserr_inval;
380 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
381 break;
382 case NFS4_SET_TO_SERVER_TIME:
383 iattr->ia_valid |= ATTR_MTIME;
384 break;
385 default:
386 goto xdr_error;
387 }
388 }
18032ca0
DQ		 389
390 label->len = 0;
391#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
392 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
393 READ_BUF(4);
394 len += 4;
395 READ32(dummy32); /* lfs: we don't use it */
396 READ_BUF(4);
397 len += 4;
398 READ32(dummy32); /* pi: we don't use it either */
399 READ_BUF(4);
400 len += 4;
401 READ32(dummy32);
402 READ_BUF(dummy32);
403 if (dummy32 > NFSD4_MAX_SEC_LABEL_LEN)
404 return nfserr_badlabel;
405 len += (XDR_QUADLEN(dummy32) << 2);
406 READMEM(buf, dummy32);
407 label->data = kzalloc(dummy32 + 1, GFP_KERNEL);
408 if (!label->data)
409 return nfserr_jukebox;
410 defer_free(argp, kfree, label->data);
411 memcpy(label->data, buf, dummy32);
412 }
413#endif
414
3c8e0316
YZ		 415 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
416 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
417 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
418 READ_BUF(expected_len - len);
419 else if (len != expected_len)
1da177e4
LT		 420 goto xdr_error;
421
422 DECODE_TAIL;
423
424out_nfserr:
b8dd7b9a 425 status = nfserrno(host_err);
1da177e4
LT		 426 goto out;
427}
428
e31a1b66
BH		 429static __be32
430nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
431{
432 DECODE_HEAD;
433
434 READ_BUF(sizeof(stateid_t));
435 READ32(sid->si_generation);
436 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
437
438 DECODE_TAIL;
439}
440
b37ad28b 441static __be32
1da177e4
LT		 442nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
443{
444 DECODE_HEAD;
445
446 READ_BUF(4);
447 READ32(access->ac_req_access);
448
449 DECODE_TAIL;
450}
451
acb2887e
BF		 452static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
453{
454 DECODE_HEAD;
12fc3e92 455 u32 dummy, uid, gid;
acb2887e
BF		 456 char *machine_name;
457 int i;
458 int nr_secflavs;
459
460 /* callback_sec_params4 */
461 READ_BUF(4);
462 READ32(nr_secflavs);
57569a70
BF		 463 if (nr_secflavs)
464 cbs->flavor = (u32)(-1);
465 else
466 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
467 cbs->flavor = 0;
acb2887e
BF		 468 for (i = 0; i < nr_secflavs; ++i) {
469 READ_BUF(4);
470 READ32(dummy);
471 switch (dummy) {
472 case RPC_AUTH_NULL:
473 /* Nothing to read */
12fc3e92
BF		 474 if (cbs->flavor == (u32)(-1))
475 cbs->flavor = RPC_AUTH_NULL;
acb2887e
BF		 476 break;
477 case RPC_AUTH_UNIX:
478 READ_BUF(8);
479 /* stamp */
480 READ32(dummy);
481
482 /* machine name */
483 READ32(dummy);
484 READ_BUF(dummy);
485 SAVEMEM(machine_name, dummy);
486
487 /* uid, gid */
488 READ_BUF(8);
12fc3e92
BF		 489 READ32(uid);
490 READ32(gid);
acb2887e
BF		 491
492 /* more gids */
493 READ_BUF(4);
494 READ32(dummy);
495 READ_BUF(dummy * 4);
12fc3e92 496 if (cbs->flavor == (u32)(-1)) {
03bc6d1c
EB		 497 kuid_t kuid = make_kuid(&init_user_ns, uid);
498 kgid_t kgid = make_kgid(&init_user_ns, gid);
499 if (uid_valid(kuid) && gid_valid(kgid)) {
500 cbs->uid = kuid;
501 cbs->gid = kgid;
502 cbs->flavor = RPC_AUTH_UNIX;
503 } else {
504 dprintk("RPC_AUTH_UNIX with invalid"
505 "uid or gid ignoring!\n");
506 }
12fc3e92 507 }
acb2887e
BF		 508 break;
509 case RPC_AUTH_GSS:
510 dprintk("RPC_AUTH_GSS callback secflavor "
511 "not supported!\n");
512 READ_BUF(8);
513 /* gcbp_service */
514 READ32(dummy);
515 /* gcbp_handle_from_server */
516 READ32(dummy);
517 READ_BUF(dummy);
518 p += XDR_QUADLEN(dummy);
519 /* gcbp_handle_from_client */
520 READ_BUF(4);
521 READ32(dummy);
522 READ_BUF(dummy);
523 break;
524 default:
525 dprintk("Illegal callback secflavor\n");
526 return nfserr_inval;
527 }
528 }
529 DECODE_TAIL;
530}
531
cb73a9f4
BF		 532static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
533{
534 DECODE_HEAD;
535
536 READ_BUF(4);
537 READ32(bc->bc_cb_program);
538 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
539
540 DECODE_TAIL;
541}
542
1d1bc8f2
BF		 543static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
544{
545 DECODE_HEAD;
1d1bc8f2
BF		 546
547 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
548 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
549 READ32(bcts->dir);
6ce2357f
BS		 550 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
551 * could help us figure out we should be using it. */
1d1bc8f2
BF		 552 DECODE_TAIL;
553}
554
b37ad28b 555static __be32
1da177e4
LT		 556nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
557{
558 DECODE_HEAD;
559
e31a1b66 560 READ_BUF(4);
1da177e4 561 READ32(close->cl_seqid);
e31a1b66 562 return nfsd4_decode_stateid(argp, &close->cl_stateid);
1da177e4
LT		 563
564 DECODE_TAIL;
565}
566
567
b37ad28b 568static __be32
1da177e4
LT		 569nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
570{
571 DECODE_HEAD;
572
573 READ_BUF(12);
574 READ64(commit->co_offset);
575 READ32(commit->co_count);
576
577 DECODE_TAIL;
578}
579
b37ad28b 580static __be32
1da177e4
LT		 581nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
582{
583 DECODE_HEAD;
584
585 READ_BUF(4);
586 READ32(create->cr_type);
587 switch (create->cr_type) {
588 case NF4LNK:
589 READ_BUF(4);
590 READ32(create->cr_linklen);
591 READ_BUF(create->cr_linklen);
592 SAVEMEM(create->cr_linkname, create->cr_linklen);
593 break;
594 case NF4BLK:
595 case NF4CHR:
596 READ_BUF(8);
597 READ32(create->cr_specdata1);
598 READ32(create->cr_specdata2);
599 break;
600 case NF4SOCK:
601 case NF4FIFO:
602 case NF4DIR:
603 default:
604 break;
605 }
606
607 READ_BUF(4);
608 READ32(create->cr_namelen);
609 READ_BUF(create->cr_namelen);
610 SAVEMEM(create->cr_name, create->cr_namelen);
a36b1725 611 if ((status = check_filename(create->cr_name, create->cr_namelen)))
1da177e4
LT		 612 return status;
613
3c8e0316 614 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
18032ca0 615 &create->cr_acl, &create->cr_label);
c0d6fc8a 616 if (status)
1da177e4
LT		 617 goto out;
618
619 DECODE_TAIL;
620}
621
b37ad28b 622static inline __be32
1da177e4
LT		 623nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
624{
e31a1b66 625 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
1da177e4
LT		 626}
627
b37ad28b 628static inline __be32
1da177e4
LT		 629nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
630{
631 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
632}
633
b37ad28b 634static __be32
1da177e4
LT		 635nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
636{
637 DECODE_HEAD;
638
639 READ_BUF(4);
640 READ32(link->li_namelen);
641 READ_BUF(link->li_namelen);
642 SAVEMEM(link->li_name, link->li_namelen);
a36b1725 643 if ((status = check_filename(link->li_name, link->li_namelen)))
1da177e4
LT		 644 return status;
645
646 DECODE_TAIL;
647}
648
b37ad28b 649static __be32
1da177e4
LT		 650nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
651{
652 DECODE_HEAD;
653
1da177e4
LT		 654 /*
655 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
656 */
657 READ_BUF(28);
658 READ32(lock->lk_type);
659 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
660 goto xdr_error;
661 READ32(lock->lk_reclaim);
662 READ64(lock->lk_offset);
663 READ64(lock->lk_length);
664 READ32(lock->lk_is_new);
665
666 if (lock->lk_is_new) {
e31a1b66 667 READ_BUF(4);
1da177e4 668 READ32(lock->lk_new_open_seqid);
e31a1b66
BH		 669 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
670 if (status)
671 return status;
672 READ_BUF(8 + sizeof(clientid_t));
1da177e4
LT		 673 READ32(lock->lk_new_lock_seqid);
674 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
675 READ32(lock->lk_new_owner.len);
676 READ_BUF(lock->lk_new_owner.len);
677 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
678 } else {
e31a1b66
BH		 679 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
680 if (status)
681 return status;
682 READ_BUF(4);
1da177e4
LT		 683 READ32(lock->lk_old_lock_seqid);
684 }
685
686 DECODE_TAIL;
687}
688
b37ad28b 689static __be32
1da177e4
LT		 690nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
691{
692 DECODE_HEAD;
693
694 READ_BUF(32);
695 READ32(lockt->lt_type);
696 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
697 goto xdr_error;
698 READ64(lockt->lt_offset);
699 READ64(lockt->lt_length);
700 COPYMEM(&lockt->lt_clientid, 8);
701 READ32(lockt->lt_owner.len);
702 READ_BUF(lockt->lt_owner.len);
703 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
704
705 DECODE_TAIL;
706}
707
b37ad28b 708static __be32
1da177e4
LT		 709nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
710{
711 DECODE_HEAD;
712
e31a1b66 713 READ_BUF(8);
1da177e4
LT		 714 READ32(locku->lu_type);
715 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
716 goto xdr_error;
717 READ32(locku->lu_seqid);
e31a1b66
BH		 718 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
719 if (status)
720 return status;
721 READ_BUF(16);
1da177e4
LT		 722 READ64(locku->lu_offset);
723 READ64(locku->lu_length);
724
725 DECODE_TAIL;
726}
727
b37ad28b 728static __be32
1da177e4
LT		 729nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
730{
731 DECODE_HEAD;
732
733 READ_BUF(4);
734 READ32(lookup->lo_len);
735 READ_BUF(lookup->lo_len);
736 SAVEMEM(lookup->lo_name, lookup->lo_len);
a36b1725 737 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
1da177e4
LT		 738 return status;
739
740 DECODE_TAIL;
741}
742
2c8bd7e0 743static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
04f9e664
BF		 744{
745 __be32 *p;
746 u32 w;
747
748 READ_BUF(4);
749 READ32(w);
2c8bd7e0
BH		 750 *share_access = w & NFS4_SHARE_ACCESS_MASK;
751 *deleg_want = w & NFS4_SHARE_WANT_MASK;
752 if (deleg_when)
753 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
754
04f9e664
BF		 755 switch (w & NFS4_SHARE_ACCESS_MASK) {
756 case NFS4_SHARE_ACCESS_READ:
757 case NFS4_SHARE_ACCESS_WRITE:
758 case NFS4_SHARE_ACCESS_BOTH:
759 break;
760 default:
761 return nfserr_bad_xdr;
762 }
fc0d14fe 763 w &= ~NFS4_SHARE_ACCESS_MASK;
04f9e664
BF		 764 if (!w)
765 return nfs_ok;
766 if (!argp->minorversion)
767 return nfserr_bad_xdr;
768 switch (w & NFS4_SHARE_WANT_MASK) {
769 case NFS4_SHARE_WANT_NO_PREFERENCE:
770 case NFS4_SHARE_WANT_READ_DELEG:
771 case NFS4_SHARE_WANT_WRITE_DELEG:
772 case NFS4_SHARE_WANT_ANY_DELEG:
773 case NFS4_SHARE_WANT_NO_DELEG:
774 case NFS4_SHARE_WANT_CANCEL:
775 break;
776 default:
777 return nfserr_bad_xdr;
778 }
92bac8c5 779 w &= ~NFS4_SHARE_WANT_MASK;
04f9e664
BF		 780 if (!w)
781 return nfs_ok;
2c8bd7e0
BH		 782
783 if (!deleg_when) /* open_downgrade */
784 return nfserr_inval;
04f9e664
BF		 785 switch (w) {
786 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
787 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
c668fc6d
BH		 788 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
789 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
04f9e664
BF		 790 return nfs_ok;
791 }
792xdr_error:
793 return nfserr_bad_xdr;
794}
795
796static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
797{
798 __be32 *p;
799
800 READ_BUF(4);
801 READ32(*x);
802 /* Note: unlinke access bits, deny bits may be zero. */
01cd4afa 803 if (*x & ~NFS4_SHARE_DENY_BOTH)
04f9e664
BF		 804 return nfserr_bad_xdr;
805 return nfs_ok;
806xdr_error:
807 return nfserr_bad_xdr;
808}
809
a084daf5
BF		 810static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
811{
812 __be32 *p;
813
814 READ_BUF(4);
815 READ32(o->len);
816
817 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
818 return nfserr_bad_xdr;
819
820 READ_BUF(o->len);
821 SAVEMEM(o->data, o->len);
822 return nfs_ok;
823xdr_error:
824 return nfserr_bad_xdr;
825}
826
b37ad28b 827static __be32
1da177e4
LT		 828nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
829{
830 DECODE_HEAD;
2c8bd7e0 831 u32 dummy;
1da177e4
LT		 832
833 memset(open->op_bmval, 0, sizeof(open->op_bmval));
834 open->op_iattr.ia_valid = 0;
fe0750e5 835 open->op_openowner = NULL;
1da177e4 836
9d313b17 837 open->op_xdr_error = 0;
1da177e4 838 /* seqid, share_access, share_deny, clientid, ownerlen */
04f9e664 839 READ_BUF(4);
1da177e4 840 READ32(open->op_seqid);
2c8bd7e0
BH		 841 /* decode, yet ignore deleg_when until supported */
842 status = nfsd4_decode_share_access(argp, &open->op_share_access,
843 &open->op_deleg_want, &dummy);
04f9e664
BF		 844 if (status)
845 goto xdr_error;
846 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
847 if (status)
848 goto xdr_error;
a084daf5 849 READ_BUF(sizeof(clientid_t));
1da177e4 850 COPYMEM(&open->op_clientid, sizeof(clientid_t));
a084daf5
BF		 851 status = nfsd4_decode_opaque(argp, &open->op_owner);
852 if (status)
853 goto xdr_error;
854 READ_BUF(4);
1da177e4
LT		 855 READ32(open->op_create);
856 switch (open->op_create) {
857 case NFS4_OPEN_NOCREATE:
858 break;
859 case NFS4_OPEN_CREATE:
860 READ_BUF(4);
861 READ32(open->op_createmode);
862 switch (open->op_createmode) {
863 case NFS4_CREATE_UNCHECKED:
864 case NFS4_CREATE_GUARDED:
c0d6fc8a 865 status = nfsd4_decode_fattr(argp, open->op_bmval,
18032ca0 866 &open->op_iattr, &open->op_acl, &open->op_label);
c0d6fc8a 867 if (status)
1da177e4
LT		 868 goto out;
869 break;
870 case NFS4_CREATE_EXCLUSIVE:
ab4684d1
CL		 871 READ_BUF(NFS4_VERIFIER_SIZE);
872 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 873 break;
79fb54ab
BH		 874 case NFS4_CREATE_EXCLUSIVE4_1:
875 if (argp->minorversion < 1)
876 goto xdr_error;
ab4684d1
CL		 877 READ_BUF(NFS4_VERIFIER_SIZE);
878 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
79fb54ab 879 status = nfsd4_decode_fattr(argp, open->op_bmval,
18032ca0 880 &open->op_iattr, &open->op_acl, &open->op_label);
79fb54ab
BH		 881 if (status)
882 goto out;
883 break;
1da177e4
LT		 884 default:
885 goto xdr_error;
886 }
887 break;
888 default:
889 goto xdr_error;
890 }
891
892 /* open_claim */
893 READ_BUF(4);
894 READ32(open->op_claim_type);
895 switch (open->op_claim_type) {
896 case NFS4_OPEN_CLAIM_NULL:
897 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
898 READ_BUF(4);
899 READ32(open->op_fname.len);
900 READ_BUF(open->op_fname.len);
901 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 902 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 903 return status;
904 break;
905 case NFS4_OPEN_CLAIM_PREVIOUS:
906 READ_BUF(4);
907 READ32(open->op_delegate_type);
908 break;
909 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
e31a1b66
BH		 910 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
911 if (status)
912 return status;
913 READ_BUF(4);
1da177e4
LT		 914 READ32(open->op_fname.len);
915 READ_BUF(open->op_fname.len);
916 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 917 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 918 return status;
919 break;
8b289b2c
BF		 920 case NFS4_OPEN_CLAIM_FH:
921 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
922 if (argp->minorversion < 1)
923 goto xdr_error;
924 /* void */
925 break;
926 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
927 if (argp->minorversion < 1)
928 goto xdr_error;
929 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
930 if (status)
931 return status;
932 break;
1da177e4
LT		 933 default:
934 goto xdr_error;
935 }
936
937 DECODE_TAIL;
938}
939
b37ad28b 940static __be32
1da177e4
LT		 941nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
942{
943 DECODE_HEAD;
944
e31a1b66
BH		 945 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
946 if (status)
947 return status;
948 READ_BUF(4);
1da177e4
LT		 949 READ32(open_conf->oc_seqid);
950
951 DECODE_TAIL;
952}
953
b37ad28b 954static __be32
1da177e4
LT		 955nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
956{
957 DECODE_HEAD;
958
e31a1b66
BH		 959 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
960 if (status)
961 return status;
04f9e664 962 READ_BUF(4);
1da177e4 963 READ32(open_down->od_seqid);
2c8bd7e0
BH		 964 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
965 &open_down->od_deleg_want, NULL);
04f9e664
BF		 966 if (status)
967 return status;
968 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
969 if (status)
970 return status;
1da177e4
LT		 971 DECODE_TAIL;
972}
973
b37ad28b 974static __be32
1da177e4
LT		 975nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
976{
977 DECODE_HEAD;
978
979 READ_BUF(4);
980 READ32(putfh->pf_fhlen);
981 if (putfh->pf_fhlen > NFS4_FHSIZE)
982 goto xdr_error;
983 READ_BUF(putfh->pf_fhlen);
984 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
985
986 DECODE_TAIL;
987}
988
b37ad28b 989static __be32
1da177e4
LT		 990nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
991{
992 DECODE_HEAD;
993
e31a1b66
BH		 994 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
995 if (status)
996 return status;
997 READ_BUF(12);
1da177e4
LT		 998 READ64(read->rd_offset);
999 READ32(read->rd_length);
1000
1001 DECODE_TAIL;
1002}
1003
b37ad28b 1004static __be32
1da177e4
LT		 1005nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1006{
1007 DECODE_HEAD;
1008
1009 READ_BUF(24);
1010 READ64(readdir->rd_cookie);
1011 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
1012 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
1013 READ32(readdir->rd_maxcount);
1014 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
1015 goto out;
1016
1017 DECODE_TAIL;
1018}
1019
b37ad28b 1020static __be32
1da177e4
LT		 1021nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1022{
1023 DECODE_HEAD;
1024
1025 READ_BUF(4);
1026 READ32(remove->rm_namelen);
1027 READ_BUF(remove->rm_namelen);
1028 SAVEMEM(remove->rm_name, remove->rm_namelen);
a36b1725 1029 if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
1da177e4
LT		 1030 return status;
1031
1032 DECODE_TAIL;
1033}
1034
b37ad28b 1035static __be32
1da177e4
LT		 1036nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1037{
1038 DECODE_HEAD;
1039
1040 READ_BUF(4);
1041 READ32(rename->rn_snamelen);
1042 READ_BUF(rename->rn_snamelen + 4);
1043 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
1044 READ32(rename->rn_tnamelen);
1045 READ_BUF(rename->rn_tnamelen);
1046 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
a36b1725 1047 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
1da177e4 1048 return status;
a36b1725 1049 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
1da177e4
LT		 1050 return status;
1051
1052 DECODE_TAIL;
1053}
1054
b37ad28b 1055static __be32
1da177e4
LT		 1056nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1057{
1058 DECODE_HEAD;
1059
1060 READ_BUF(sizeof(clientid_t));
1061 COPYMEM(clientid, sizeof(clientid_t));
1062
1063 DECODE_TAIL;
1064}
1065
dcb488a3
AA		 1066static __be32
1067nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1068 struct nfsd4_secinfo *secinfo)
1069{
1070 DECODE_HEAD;
1071
1072 READ_BUF(4);
1073 READ32(secinfo->si_namelen);
1074 READ_BUF(secinfo->si_namelen);
1075 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
a36b1725 1076 status = check_filename(secinfo->si_name, secinfo->si_namelen);
dcb488a3
AA		 1077 if (status)
1078 return status;
1079 DECODE_TAIL;
1080}
1081
04f4ad16
BF		 1082static __be32
1083nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1084 struct nfsd4_secinfo_no_name *sin)
1085{
1086 DECODE_HEAD;
1087
1088 READ_BUF(4);
1089 READ32(sin->sin_style);
1090 DECODE_TAIL;
1091}
1092
b37ad28b 1093static __be32
1da177e4
LT		 1094nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1095{
e31a1b66 1096 __be32 status;
1da177e4 1097
e31a1b66
BH		 1098 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1099 if (status)
1100 return status;
3c8e0316 1101 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
18032ca0 1102 &setattr->sa_acl, &setattr->sa_label);
1da177e4
LT		 1103}
1104
b37ad28b 1105static __be32
1da177e4
LT		 1106nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1107{
1108 DECODE_HEAD;
1109
ab4684d1
CL		 1110 READ_BUF(NFS4_VERIFIER_SIZE);
1111 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 1112
a084daf5
BF		 1113 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1114 if (status)
1115 return nfserr_bad_xdr;
1116 READ_BUF(8);
1da177e4
LT		 1117 READ32(setclientid->se_callback_prog);
1118 READ32(setclientid->se_callback_netid_len);
1119
1120 READ_BUF(setclientid->se_callback_netid_len + 4);
1121 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
1122 READ32(setclientid->se_callback_addr_len);
1123
1124 READ_BUF(setclientid->se_callback_addr_len + 4);
1125 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
1126 READ32(setclientid->se_callback_ident);
1127
1128 DECODE_TAIL;
1129}
1130
b37ad28b 1131static __be32
1da177e4
LT		 1132nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1133{
1134 DECODE_HEAD;
1135
ab4684d1 1136 READ_BUF(8 + NFS4_VERIFIER_SIZE);
1da177e4 1137 COPYMEM(&scd_c->sc_clientid, 8);
ab4684d1 1138 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
1da177e4
LT		 1139
1140 DECODE_TAIL;
1141}
1142
1143/* Also used for NVERIFY */
b37ad28b 1144static __be32
1da177e4
LT		 1145nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1146{
1da177e4
LT		 1147 DECODE_HEAD;
1148
1149 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1150 goto out;
1151
1152 /* For convenience's sake, we compare raw xdr'd attributes in
e5f95703
BF		 1153 * nfsd4_proc_verify */
1154
1da177e4
LT		 1155 READ_BUF(4);
1156 READ32(verify->ve_attrlen);
1157 READ_BUF(verify->ve_attrlen);
1158 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1159
1160 DECODE_TAIL;
1161}
1162
b37ad28b 1163static __be32
1da177e4
LT		 1164nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1165{
1166 int avail;
1da177e4
LT		 1167 int len;
1168 DECODE_HEAD;
1169
e31a1b66
BH		 1170 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1171 if (status)
1172 return status;
1173 READ_BUF(16);
1da177e4
LT		 1174 READ64(write->wr_offset);
1175 READ32(write->wr_stable_how);
1176 if (write->wr_stable_how > 2)
1177 goto xdr_error;
1178 READ32(write->wr_buflen);
1179
1180 /* Sorry .. no magic macros for this.. *
1181 * READ_BUF(write->wr_buflen);
1182 * SAVEMEM(write->wr_buf, write->wr_buflen);
1183 */
1184 avail = (char*)argp->end - (char*)argp->p;
1185 if (avail + argp->pagelen < write->wr_buflen) {
817cb9d4
CL		 1186 dprintk("NFSD: xdr error (%s:%d)\n",
1187 __FILE__, __LINE__);
1da177e4
LT		 1188 goto xdr_error;
1189 }
70cc7f75
BF		 1190 write->wr_head.iov_base = p;
1191 write->wr_head.iov_len = avail;
5a80a54d 1192 WARN_ON(avail != (XDR_QUADLEN(avail) << 2));
70cc7f75 1193 write->wr_pagelist = argp->pagelist;
5a80a54d
BF		 1194
1195 len = XDR_QUADLEN(write->wr_buflen) << 2;
1196 if (len >= avail) {
1197 int pages;
1198
1199 len -= avail;
1200
1201 pages = len >> PAGE_SHIFT;
1202 argp->pagelist += pages;
1203 argp->pagelen -= pages * PAGE_SIZE;
1204 len -= pages * PAGE_SIZE;
1205
1206 argp->p = (__be32 *)page_address(argp->pagelist[0]);
1207 argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE);
1da177e4 1208 }
5a80a54d 1209 argp->p += XDR_QUADLEN(len);
1da177e4
LT		 1210
1211 DECODE_TAIL;
1212}
1213
b37ad28b 1214static __be32
1da177e4
LT		 1215nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1216{
1217 DECODE_HEAD;
1218
1219 READ_BUF(12);
1220 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1221 READ32(rlockowner->rl_owner.len);
1222 READ_BUF(rlockowner->rl_owner.len);
1223 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1224
60adfc50
AA		 1225 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1226 return nfserr_inval;
1da177e4
LT		 1227 DECODE_TAIL;
1228}
1229
2db134eb
AA		 1230static __be32
1231nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
0733d213 1232 struct nfsd4_exchange_id *exid)
2db134eb 1233{
5afa040b 1234 int dummy, tmp;
0733d213
AA		 1235 DECODE_HEAD;
1236
1237 READ_BUF(NFS4_VERIFIER_SIZE);
1238 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1239
a084daf5
BF		 1240 status = nfsd4_decode_opaque(argp, &exid->clname);
1241 if (status)
1242 return nfserr_bad_xdr;
0733d213
AA		 1243
1244 READ_BUF(4);
1245 READ32(exid->flags);
1246
1247 /* Ignore state_protect4_a */
1248 READ_BUF(4);
1249 READ32(exid->spa_how);
1250 switch (exid->spa_how) {
1251 case SP4_NONE:
1252 break;
1253 case SP4_MACH_CRED:
1254 /* spo_must_enforce */
1255 READ_BUF(4);
1256 READ32(dummy);
1257 READ_BUF(dummy * 4);
1258 p += dummy;
1259
1260 /* spo_must_allow */
1261 READ_BUF(4);
1262 READ32(dummy);
1263 READ_BUF(dummy * 4);
1264 p += dummy;
1265 break;
1266 case SP4_SSV:
1267 /* ssp_ops */
1268 READ_BUF(4);
1269 READ32(dummy);
1270 READ_BUF(dummy * 4);
1271 p += dummy;
1272
1273 READ_BUF(4);
1274 READ32(dummy);
1275 READ_BUF(dummy * 4);
1276 p += dummy;
1277
1278 /* ssp_hash_algs<> */
1279 READ_BUF(4);
5afa040b
MJ		 1280 READ32(tmp);
1281 while (tmp--) {
1282 READ_BUF(4);
1283 READ32(dummy);
1284 READ_BUF(dummy);
1285 p += XDR_QUADLEN(dummy);
1286 }
0733d213
AA		 1287
1288 /* ssp_encr_algs<> */
1289 READ_BUF(4);
5afa040b
MJ		 1290 READ32(tmp);
1291 while (tmp--) {
1292 READ_BUF(4);
1293 READ32(dummy);
1294 READ_BUF(dummy);
1295 p += XDR_QUADLEN(dummy);
1296 }
0733d213
AA		 1297
1298 /* ssp_window and ssp_num_gss_handles */
1299 READ_BUF(8);
1300 READ32(dummy);
1301 READ32(dummy);
1302 break;
1303 default:
1304 goto xdr_error;
1305 }
1306
1307 /* Ignore Implementation ID */
1308 READ_BUF(4); /* nfs_impl_id4 array length */
1309 READ32(dummy);
1310
1311 if (dummy > 1)
1312 goto xdr_error;
1313
1314 if (dummy == 1) {
1315 /* nii_domain */
1316 READ_BUF(4);
1317 READ32(dummy);
1318 READ_BUF(dummy);
1319 p += XDR_QUADLEN(dummy);
1320
1321 /* nii_name */
1322 READ_BUF(4);
1323 READ32(dummy);
1324 READ_BUF(dummy);
1325 p += XDR_QUADLEN(dummy);
1326
1327 /* nii_date */
1328 READ_BUF(12);
1329 p += 3;
1330 }
1331 DECODE_TAIL;
2db134eb
AA		 1332}
1333
1334static __be32
1335nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1336 struct nfsd4_create_session *sess)
1337{
ec6b5d7b 1338 DECODE_HEAD;
ec6b5d7b 1339 u32 dummy;
ec6b5d7b
AA		 1340
1341 READ_BUF(16);
1342 COPYMEM(&sess->clientid, 8);
1343 READ32(sess->seqid);
1344 READ32(sess->flags);
1345
1346 /* Fore channel attrs */
1347 READ_BUF(28);
1348 READ32(dummy); /* headerpadsz is always 0 */
1349 READ32(sess->fore_channel.maxreq_sz);
1350 READ32(sess->fore_channel.maxresp_sz);
1351 READ32(sess->fore_channel.maxresp_cached);
1352 READ32(sess->fore_channel.maxops);
1353 READ32(sess->fore_channel.maxreqs);
1354 READ32(sess->fore_channel.nr_rdma_attrs);
1355 if (sess->fore_channel.nr_rdma_attrs == 1) {
1356 READ_BUF(4);
1357 READ32(sess->fore_channel.rdma_attrs);
1358 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1359 dprintk("Too many fore channel attr bitmaps!\n");
1360 goto xdr_error;
1361 }
1362
1363 /* Back channel attrs */
1364 READ_BUF(28);
1365 READ32(dummy); /* headerpadsz is always 0 */
1366 READ32(sess->back_channel.maxreq_sz);
1367 READ32(sess->back_channel.maxresp_sz);
1368 READ32(sess->back_channel.maxresp_cached);
1369 READ32(sess->back_channel.maxops);
1370 READ32(sess->back_channel.maxreqs);
1371 READ32(sess->back_channel.nr_rdma_attrs);
1372 if (sess->back_channel.nr_rdma_attrs == 1) {
1373 READ_BUF(4);
1374 READ32(sess->back_channel.rdma_attrs);
1375 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1376 dprintk("Too many back channel attr bitmaps!\n");
1377 goto xdr_error;
1378 }
1379
acb2887e 1380 READ_BUF(4);
ec6b5d7b 1381 READ32(sess->callback_prog);
acb2887e 1382 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
ec6b5d7b 1383 DECODE_TAIL;
2db134eb
AA		 1384}
1385
1386static __be32
1387nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1388 struct nfsd4_destroy_session *destroy_session)
1389{
e10e0cfc
BH		 1390 DECODE_HEAD;
1391 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1392 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1393
1394 DECODE_TAIL;
2db134eb
AA		 1395}
1396
e1ca12df
BS		 1397static __be32
1398nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1399 struct nfsd4_free_stateid *free_stateid)
1400{
1401 DECODE_HEAD;
1402
1403 READ_BUF(sizeof(stateid_t));
1404 READ32(free_stateid->fr_stateid.si_generation);
1405 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1406
1407 DECODE_TAIL;
1408}
1409
2db134eb
AA		 1410static __be32
1411nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1412 struct nfsd4_sequence *seq)
1413{
b85d4c01
BH		 1414 DECODE_HEAD;
1415
1416 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1417 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1418 READ32(seq->seqid);
1419 READ32(seq->slotid);
1420 READ32(seq->maxslots);
1421 READ32(seq->cachethis);
1422
1423 DECODE_TAIL;
2db134eb
AA		 1424}
1425
17456804
BS		 1426static __be32
1427nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1428{
17456804 1429 int i;
03cfb420
BS		 1430 __be32 *p, status;
1431 struct nfsd4_test_stateid_id *stateid;
17456804
BS		 1432
1433 READ_BUF(4);
1434 test_stateid->ts_num_ids = ntohl(*p++);
1435
03cfb420 1436 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
17456804
BS		 1437
1438 for (i = 0; i < test_stateid->ts_num_ids; i++) {
03cfb420
BS		 1439 stateid = kmalloc(sizeof(struct nfsd4_test_stateid_id), GFP_KERNEL);
1440 if (!stateid) {
afcf6792 1441 status = nfserrno(-ENOMEM);
03cfb420
BS		 1442 goto out;
1443 }
1444
1445 defer_free(argp, kfree, stateid);
1446 INIT_LIST_HEAD(&stateid->ts_id_list);
1447 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1448
1449 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
17456804 1450 if (status)
03cfb420 1451 goto out;
17456804
BS		 1452 }
1453
1454 status = 0;
1455out:
1456 return status;
1457xdr_error:
1458 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1459 status = nfserr_bad_xdr;
1460 goto out;
1461}
1462
345c2842
MJ		 1463static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1464{
1465 DECODE_HEAD;
1466
1467 READ_BUF(8);
1468 COPYMEM(&dc->clientid, 8);
1469
1470 DECODE_TAIL;
1471}
1472
4dc6ec00
BF		 1473static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1474{
1475 DECODE_HEAD;
1476
1477 READ_BUF(4);
1478 READ32(rc->rca_one_fs);
1479
1480 DECODE_TAIL;
1481}
1482
347e0ad9
BH		 1483static __be32
1484nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1485{
1486 return nfs_ok;
1487}
1488
3c375c6f
BH		 1489static __be32
1490nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1491{
1e685ec2 1492 return nfserr_notsupp;
3c375c6f
BH		 1493}
1494
347e0ad9
BH		 1495typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1496
1497static nfsd4_dec nfsd4_dec_ops[] = {
ad1060c8
BF		 1498 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1499 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1500 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1501 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1502 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1503 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1504 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1505 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1506 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1507 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1508 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1509 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1510 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1511 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1512 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1513 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1514 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1515 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1516 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1517 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
a1c8c4d1 1518 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop,
ad1060c8
BF		 1519 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1520 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1521 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1522 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1523 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1524 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1525 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1526 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1527 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1528 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1529 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1530 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1531 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1532 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1533 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1534 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
347e0ad9
BH		 1535};
1536
2db134eb 1537static nfsd4_dec nfsd41_dec_ops[] = {
9064caae
RD		 1538 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1539 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1540 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1541 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1542 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1543 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1544 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1545 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1546 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1547 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1548 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1549 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1550 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1551 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1552 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1553 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1554 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1555 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_notsupp,
1556 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1557 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1558 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_notsupp,
1559 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1560 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1561 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1562 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1563 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1564 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1565 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_notsupp,
1566 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1567 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1568 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1569 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1570 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1571 [OP_SETCLIENTID_CONFIRM]= (nfsd4_dec)nfsd4_decode_notsupp,
1572 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1573 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1574 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_notsupp,
2db134eb
AA		 1575
1576 /* new operations for NFSv4.1 */
cb73a9f4 1577 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1d1bc8f2 1578 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
9064caae
RD		 1579 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1580 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1581 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
e1ca12df 1582 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
9064caae
RD		 1583 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1584 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1585 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1586 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1587 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1588 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
04f4ad16 1589 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
9064caae
RD		 1590 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1591 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
17456804 1592 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
9064caae 1593 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
345c2842 1594 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
4dc6ec00 1595 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
2db134eb
AA		 1596};
1597
f2feb96b
BH		 1598struct nfsd4_minorversion_ops {
1599 nfsd4_dec *decoders;
1600 int nops;
1601};
1602
1603static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
ad1060c8 1604 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
2db134eb 1605 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
4bdc33ed 1606 [2] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
f2feb96b
BH		 1607};
1608
b37ad28b 1609static __be32
1da177e4
LT		 1610nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1611{
1612 DECODE_HEAD;
1613 struct nfsd4_op *op;
f2feb96b 1614 struct nfsd4_minorversion_ops *ops;
1091006c 1615 bool cachethis = false;
1da177e4
LT		 1616 int i;
1617
1da177e4
LT		 1618 READ_BUF(4);
1619 READ32(argp->taglen);
1620 READ_BUF(argp->taglen + 8);
1621 SAVEMEM(argp->tag, argp->taglen);
1622 READ32(argp->minorversion);
1623 READ32(argp->opcnt);
1624
1625 if (argp->taglen > NFSD4_MAX_TAGLEN)
1626 goto xdr_error;
1627 if (argp->opcnt > 100)
1628 goto xdr_error;
1629
e8c96f8c 1630 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1da177e4
LT		 1631 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1632 if (!argp->ops) {
1633 argp->ops = argp->iops;
817cb9d4 1634 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1da177e4
LT		 1635 goto xdr_error;
1636 }
1637 }
1638
f2feb96b 1639 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion))
30cff1ff
BH		 1640 argp->opcnt = 0;
1641
f2feb96b 1642 ops = &nfsd4_minorversion[argp->minorversion];
1da177e4
LT		 1643 for (i = 0; i < argp->opcnt; i++) {
1644 op = &argp->ops[i];
1645 op->replay = NULL;
1646
8a61b18c
BF		 1647 READ_BUF(4);
1648 READ32(op->opnum);
1da177e4 1649
de3cab79 1650 if (op->opnum >= FIRST_NFS4_OP && op->opnum <= LAST_NFS4_OP)
f2feb96b 1651 op->status = ops->decoders[op->opnum](argp, &op->u);
347e0ad9 1652 else {
1da177e4
LT		 1653 op->opnum = OP_ILLEGAL;
1654 op->status = nfserr_op_illegal;
1da177e4
LT		 1655 }
1656
1657 if (op->status) {
1658 argp->opcnt = i+1;
1659 break;
1660 }
1091006c
BF		 1661 /*
1662 * We'll try to cache the result in the DRC if any one
1663 * op in the compound wants to be cached:
1664 */
1665 cachethis |= nfsd4_cache_this_op(op);
1da177e4 1666 }
1091006c
BF		 1667 /* Sessions make the DRC unnecessary: */
1668 if (argp->minorversion)
1669 cachethis = false;
1670 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1da177e4
LT		 1671
1672 DECODE_TAIL;
1673}
1da177e4 1674
1da177e4
LT		 1675#define WRITE32(n) *p++ = htonl(n)
1676#define WRITE64(n) do { \
1677 *p++ = htonl((u32)((n) >> 32)); \
1678 *p++ = htonl((u32)(n)); \
1679} while (0)
5108b276 1680#define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1da177e4
LT		 1681 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1682 memcpy(p, ptr, nbytes); \
1683 p += XDR_QUADLEN(nbytes); \
5108b276 1684}} while (0)
c654b8a9
BF		 1685
1686static void write32(__be32 **p, u32 n)
1687{
45eaa1c1 1688 *(*p)++ = htonl(n);
c654b8a9
BF		 1689}
1690
1691static void write64(__be32 **p, u64 n)
1692{
45eaa1c1 1693 write32(p, (n >> 32));
c654b8a9
BF		 1694 write32(p, (u32)n);
1695}
1696
1697static void write_change(__be32 **p, struct kstat *stat, struct inode *inode)
1698{
1699 if (IS_I_VERSION(inode)) {
1700 write64(p, inode->i_version);
1701 } else {
1702 write32(p, stat->ctime.tv_sec);
1703 write32(p, stat->ctime.tv_nsec);
1704 }
1705}
1706
1707static void write_cinfo(__be32 **p, struct nfsd4_change_info *c)
1708{
1709 write32(p, c->atomic);
1710 if (c->change_supported) {
1711 write64(p, c->before_change);
1712 write64(p, c->after_change);
1713 } else {
1714 write32(p, c->before_ctime_sec);
1715 write32(p, c->before_ctime_nsec);
1716 write32(p, c->after_ctime_sec);
1717 write32(p, c->after_ctime_nsec);
1718 }
1719}
1da177e4
LT		 1720
1721#define RESERVE_SPACE(nbytes) do { \
1722 p = resp->p; \
1723 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1724} while (0)
1725#define ADJUST_ARGS() resp->p = p
1726
81c3f413 1727/* Encode as an array of strings the string given with components
e7a0444a 1728 * separated @sep, escaped with esc_enter and esc_exit.
81c3f413 1729 */
e7a0444a
WAA		 1730static __be32 nfsd4_encode_components_esc(char sep, char *components,
1731 __be32 **pp, int *buflen,
1732 char esc_enter, char esc_exit)
81c3f413 1733{
2ebbc012
AV		 1734 __be32 *p = *pp;
1735 __be32 *countp = p;
81c3f413 1736 int strlen, count=0;
e7a0444a 1737 char *str, *end, *next;
81c3f413
BF		 1738
1739 dprintk("nfsd4_encode_components(%s)\n", components);
1740 if ((*buflen -= 4) < 0)
1741 return nfserr_resource;
1742 WRITE32(0); /* We will fill this in with @count later */
1743 end = str = components;
1744 while (*end) {
e7a0444a
WAA		 1745 bool found_esc = false;
1746
1747 /* try to parse as esc_start, ..., esc_end, sep */
1748 if (*str == esc_enter) {
1749 for (; *end && (*end != esc_exit); end++)
1750 /* find esc_exit or end of string */;
1751 next = end + 1;
1752 if (*end && (!*next || *next == sep)) {
1753 str++;
1754 found_esc = true;
1755 }
1756 }
1757
1758 if (!found_esc)
1759 for (; *end && (*end != sep); end++)
1760 /* find sep or end of string */;
1761
81c3f413
BF		 1762 strlen = end - str;
1763 if (strlen) {
1764 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1765 return nfserr_resource;
1766 WRITE32(strlen);
1767 WRITEMEM(str, strlen);
1768 count++;
1769 }
1770 else
1771 end++;
1772 str = end;
1773 }
1774 *pp = p;
1775 p = countp;
1776 WRITE32(count);
1777 return 0;
1778}
1779
e7a0444a
WAA		 1780/* Encode as an array of strings the string given with components
1781 * separated @sep.
1782 */
1783static __be32 nfsd4_encode_components(char sep, char *components,
1784 __be32 **pp, int *buflen)
1785{
1786 return nfsd4_encode_components_esc(sep, components, pp, buflen, 0, 0);
1787}
1788
81c3f413
BF		 1789/*
1790 * encode a location element of a fs_locations structure
1791 */
b37ad28b 1792static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
2ebbc012 1793 __be32 **pp, int *buflen)
81c3f413 1794{
b37ad28b 1795 __be32 status;
2ebbc012 1796 __be32 *p = *pp;
81c3f413 1797
e7a0444a
WAA		 1798 status = nfsd4_encode_components_esc(':', location->hosts, &p, buflen,
1799 '[', ']');
81c3f413
BF		 1800 if (status)
1801 return status;
1802 status = nfsd4_encode_components('/', location->path, &p, buflen);
1803 if (status)
1804 return status;
1805 *pp = p;
1806 return 0;
1807}
1808
1809/*
ed748aac 1810 * Encode a path in RFC3530 'pathname4' format
81c3f413 1811 */
ed748aac
TM		 1812static __be32 nfsd4_encode_path(const struct path *root,
1813 const struct path *path, __be32 **pp, int *buflen)
81c3f413 1814{
ed748aac
TM		 1815 struct path cur = {
1816 .mnt = path->mnt,
1817 .dentry = path->dentry,
1818 };
1819 __be32 *p = *pp;
1820 struct dentry **components = NULL;
1821 unsigned int ncomponents = 0;
1822 __be32 err = nfserr_jukebox;
81c3f413 1823
ed748aac 1824 dprintk("nfsd4_encode_components(");
81c3f413 1825
ed748aac
TM		 1826 path_get(&cur);
1827 /* First walk the path up to the nfsd root, and store the
1828 * dentries/path components in an array.
1829 */
1830 for (;;) {
1831 if (cur.dentry == root->dentry && cur.mnt == root->mnt)
1832 break;
1833 if (cur.dentry == cur.mnt->mnt_root) {
1834 if (follow_up(&cur))
1835 continue;
1836 goto out_free;
1837 }
1838 if ((ncomponents & 15) == 0) {
1839 struct dentry **new;
1840 new = krealloc(components,
1841 sizeof(*new) * (ncomponents + 16),
1842 GFP_KERNEL);
1843 if (!new)
1844 goto out_free;
1845 components = new;
1846 }
1847 components[ncomponents++] = cur.dentry;
1848 cur.dentry = dget_parent(cur.dentry);
1849 }
81c3f413 1850
ed748aac
TM		 1851 *buflen -= 4;
1852 if (*buflen < 0)
1853 goto out_free;
1854 WRITE32(ncomponents);
1855
1856 while (ncomponents) {
1857 struct dentry *dentry = components[ncomponents - 1];
1858 unsigned int len = dentry->d_name.len;
1859
1860 *buflen -= 4 + (XDR_QUADLEN(len) << 2);
1861 if (*buflen < 0)
1862 goto out_free;
1863 WRITE32(len);
1864 WRITEMEM(dentry->d_name.name, len);
1865 dprintk("/%s", dentry->d_name.name);
1866 dput(dentry);
1867 ncomponents--;
81c3f413 1868 }
ed748aac
TM		 1869
1870 *pp = p;
1871 err = 0;
1872out_free:
1873 dprintk(")\n");
1874 while (ncomponents)
1875 dput(components[--ncomponents]);
1876 kfree(components);
1877 path_put(&cur);
1878 return err;
1879}
1880
1881static __be32 nfsd4_encode_fsloc_fsroot(struct svc_rqst *rqstp,
1882 const struct path *path, __be32 **pp, int *buflen)
1883{
1884 struct svc_export *exp_ps;
1885 __be32 res;
1886
1887 exp_ps = rqst_find_fsidzero_export(rqstp);
1888 if (IS_ERR(exp_ps))
1889 return nfserrno(PTR_ERR(exp_ps));
1890 res = nfsd4_encode_path(&exp_ps->ex_path, path, pp, buflen);
1891 exp_put(exp_ps);
1892 return res;
81c3f413
BF		 1893}
1894
1895/*
1896 * encode a fs_locations structure
1897 */
b37ad28b 1898static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
81c3f413 1899 struct svc_export *exp,
2ebbc012 1900 __be32 **pp, int *buflen)
81c3f413 1901{
b37ad28b 1902 __be32 status;
cc45f017 1903 int i;
2ebbc012 1904 __be32 *p = *pp;
81c3f413 1905 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
81c3f413 1906
ed748aac 1907 status = nfsd4_encode_fsloc_fsroot(rqstp, &exp->ex_path, &p, buflen);
81c3f413
BF		 1908 if (status)
1909 return status;
1910 if ((*buflen -= 4) < 0)
1911 return nfserr_resource;
1912 WRITE32(fslocs->locations_count);
1913 for (i=0; i<fslocs->locations_count; i++) {
1914 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1915 &p, buflen);
1916 if (status)
1917 return status;
1918 }
1919 *pp = p;
1920 return 0;
1921}
1da177e4 1922
3d2544b1
BF		 1923static u32 nfs4_file_type(umode_t mode)
1924{
1925 switch (mode & S_IFMT) {
1926 case S_IFIFO: return NF4FIFO;
1927 case S_IFCHR: return NF4CHR;
1928 case S_IFDIR: return NF4DIR;
1929 case S_IFBLK: return NF4BLK;
1930 case S_IFLNK: return NF4LNK;
1931 case S_IFREG: return NF4REG;
1932 case S_IFSOCK: return NF4SOCK;
1933 default: return NF4BAD;
1934 };
1935}
1da177e4 1936
b37ad28b 1937static __be32
ab8e4aee 1938nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, kuid_t uid, kgid_t gid,
2ebbc012 1939 __be32 **p, int *buflen)
1da177e4
LT		 1940{
1941 int status;
1942
1943 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1944 return nfserr_resource;
1945 if (whotype != NFS4_ACL_WHO_NAMED)
1946 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
ab8e4aee
EB		 1947 else if (gid_valid(gid))
1948 status = nfsd_map_gid_to_name(rqstp, gid, (u8 *)(*p + 1));
1da177e4 1949 else
ab8e4aee 1950 status = nfsd_map_uid_to_name(rqstp, uid, (u8 *)(*p + 1));
1da177e4
LT		 1951 if (status < 0)
1952 return nfserrno(status);
1953 *p = xdr_encode_opaque(*p, NULL, status);
1954 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1955 BUG_ON(*buflen < 0);
1956 return 0;
1957}
1958
b37ad28b 1959static inline __be32
ab8e4aee 1960nfsd4_encode_user(struct svc_rqst *rqstp, kuid_t user, __be32 **p, int *buflen)
1da177e4 1961{
ab8e4aee
EB		 1962 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, user, INVALID_GID,
1963 p, buflen);
1da177e4
LT		 1964}
1965
b37ad28b 1966static inline __be32
ab8e4aee 1967nfsd4_encode_group(struct svc_rqst *rqstp, kgid_t group, __be32 **p, int *buflen)
1da177e4 1968{
ab8e4aee
EB		 1969 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, INVALID_UID, group,
1970 p, buflen);
1da177e4
LT		 1971}
1972
b37ad28b 1973static inline __be32
ab8e4aee 1974nfsd4_encode_aclname(struct svc_rqst *rqstp, struct nfs4_ace *ace,
2ebbc012 1975 __be32 **p, int *buflen)
1da177e4 1976{
ab8e4aee
EB		 1977 kuid_t uid = INVALID_UID;
1978 kgid_t gid = INVALID_GID;
1979
1980 if (ace->whotype == NFS4_ACL_WHO_NAMED) {
1981 if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
1982 gid = ace->who_gid;
1983 else
1984 uid = ace->who_uid;
1985 }
1986 return nfsd4_encode_name(rqstp, ace->whotype, uid, gid, p, buflen);
1da177e4
LT		 1987}
1988
42ca0993
BF		 1989#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1990 FATTR4_WORD0_RDATTR_ERROR)
1991#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1992
18032ca0
DQ		 1993#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
1994static inline __be32
1995nfsd4_encode_security_label(struct svc_rqst *rqstp, void *context, int len, __be32 **pp, int *buflen)
1996{
1997 __be32 *p = *pp;
1998
1999 if (*buflen < ((XDR_QUADLEN(len) << 2) + 4 + 4 + 4))
2000 return nfserr_resource;
2001
2002 /*
2003 * For now we use a 0 here to indicate the null translation; in
2004 * the future we may place a call to translation code here.
2005 */
2006 if ((*buflen -= 8) < 0)
2007 return nfserr_resource;
2008
2009 WRITE32(0); /* lfs */
2010 WRITE32(0); /* pi */
2011 p = xdr_encode_opaque(p, context, len);
2012 *buflen -= (XDR_QUADLEN(len) << 2) + 4;
2013
2014 *pp = p;
2015 return 0;
2016}
2017#else
2018static inline __be32
ba4e55bb 2019nfsd4_encode_security_label(struct svc_rqst *rqstp, void *context, int len, __be32 **pp, int *buflen)
18032ca0
DQ		 2020{ return 0; }
2021#endif
2022
b37ad28b 2023static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
42ca0993
BF		 2024{
2025 /* As per referral draft: */
2026 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2027 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2028 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2029 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2030 *rdattr_err = NFSERR_MOVED;
2031 else
2032 return nfserr_moved;
2033 }
2034 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2035 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
2036 return 0;
2037}
1da177e4 2038
ae7095a7
BF		 2039
2040static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2041{
2042 struct path path = exp->ex_path;
2043 int err;
2044
2045 path_get(&path);
2046 while (follow_up(&path)) {
2047 if (path.dentry != path.mnt->mnt_root)
2048 break;
2049 }
3dadecce 2050 err = vfs_getattr(&path, stat);
ae7095a7
BF		 2051 path_put(&path);
2052 return err;
2053}
2054
1da177e4
LT		 2055/*
2056 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2057 * ourselves.
2058 *
84822d0b 2059 * countp is the buffer size in _words_
1da177e4 2060 */
b37ad28b 2061__be32
1da177e4 2062nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
84822d0b 2063 struct dentry *dentry, __be32 **buffer, int count, u32 *bmval,
406a7ea9 2064 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 2065{
2066 u32 bmval0 = bmval[0];
2067 u32 bmval1 = bmval[1];
7e705706 2068 u32 bmval2 = bmval[2];
1da177e4
LT		 2069 struct kstat stat;
2070 struct svc_fh tempfh;
2071 struct kstatfs statfs;
84822d0b 2072 int buflen = count << 2;
2ebbc012 2073 __be32 *attrlenp;
1da177e4
LT		 2074 u32 dummy;
2075 u64 dummy64;
42ca0993 2076 u32 rdattr_err = 0;
84822d0b 2077 __be32 *p = *buffer;
b37ad28b 2078 __be32 status;
b8dd7b9a 2079 int err;
1da177e4
LT		 2080 int aclsupport = 0;
2081 struct nfs4_acl *acl = NULL;
18032ca0
DQ		 2082 void *context = NULL;
2083 int contextlen;
2084 bool contextsupport = false;
7e705706
AA		 2085 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2086 u32 minorversion = resp->cstate.minorversion;
ebabe9a9
CH		 2087 struct path path = {
2088 .mnt = exp->ex_path.mnt,
2089 .dentry = dentry,
2090 };
3d733711 2091 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1da177e4
LT		 2092
2093 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
7e705706
AA		 2094 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
2095 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
2096 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
1da177e4 2097
42ca0993 2098 if (exp->ex_fslocs.migrated) {
7e705706 2099 BUG_ON(bmval[2]);
42ca0993
BF		 2100 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
2101 if (status)
2102 goto out;
2103 }
2104
3dadecce 2105 err = vfs_getattr(&path, &stat);
b8dd7b9a 2106 if (err)
1da177e4 2107 goto out_nfserr;
a16e92ed
BF		 2108 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
2109 FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 2110 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2111 FATTR4_WORD1_SPACE_TOTAL))) {
ebabe9a9 2112 err = vfs_statfs(&path, &statfs);
b8dd7b9a 2113 if (err)
1da177e4
LT		 2114 goto out_nfserr;
2115 }
2116 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
2117 fh_init(&tempfh, NFS4_FHSIZE);
2118 status = fh_compose(&tempfh, exp, dentry, NULL);
2119 if (status)
2120 goto out;
2121 fhp = &tempfh;
2122 }
2123 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
2124 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
b8dd7b9a
AV		 2125 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2126 aclsupport = (err == 0);
1da177e4 2127 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 2128 if (err == -EOPNOTSUPP)
1da177e4 2129 bmval0 &= ~FATTR4_WORD0_ACL;
b8dd7b9a 2130 else if (err == -EINVAL) {
1da177e4
LT		 2131 status = nfserr_attrnotsupp;
2132 goto out;
b8dd7b9a 2133 } else if (err != 0)
1da177e4
LT		 2134 goto out_nfserr;
2135 }
2136 }
1da177e4 2137
18032ca0
DQ		 2138#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2139 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) ||
2140 bmval[0] & FATTR4_WORD0_SUPPORTED_ATTRS) {
2141 err = security_inode_getsecctx(dentry->d_inode,
2142 &context, &contextlen);
2143 contextsupport = (err == 0);
2144 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2145 if (err == -EOPNOTSUPP)
2146 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2147 else if (err)
2148 goto out_nfserr;
2149 }
2150 }
2151#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2152
2b44f1ba
BH		 2153 if (bmval2) {
2154 if ((buflen -= 16) < 0)
2155 goto out_resource;
7e705706
AA		 2156 WRITE32(3);
2157 WRITE32(bmval0);
2158 WRITE32(bmval1);
2159 WRITE32(bmval2);
2b44f1ba
BH		 2160 } else if (bmval1) {
2161 if ((buflen -= 12) < 0)
2162 goto out_resource;
7e705706
AA		 2163 WRITE32(2);
2164 WRITE32(bmval0);
2165 WRITE32(bmval1);
2166 } else {
2b44f1ba
BH		 2167 if ((buflen -= 8) < 0)
2168 goto out_resource;
7e705706
AA		 2169 WRITE32(1);
2170 WRITE32(bmval0);
2171 }
1da177e4
LT		 2172 attrlenp = p++; /* to be backfilled later */
2173
2174 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
7e705706
AA		 2175 u32 word0 = nfsd_suppattrs0(minorversion);
2176 u32 word1 = nfsd_suppattrs1(minorversion);
2177 u32 word2 = nfsd_suppattrs2(minorversion);
2178
42ca0993
BF		 2179 if (!aclsupport)
2180 word0 &= ~FATTR4_WORD0_ACL;
18032ca0
DQ		 2181 if (!contextsupport)
2182 word2 &= ~FATTR4_WORD2_SECURITY_LABEL;
7e705706 2183 if (!word2) {
2b44f1ba
BH		 2184 if ((buflen -= 12) < 0)
2185 goto out_resource;
7e705706
AA		 2186 WRITE32(2);
2187 WRITE32(word0);
2188 WRITE32(word1);
2189 } else {
2b44f1ba
BH		 2190 if ((buflen -= 16) < 0)
2191 goto out_resource;
7e705706
AA		 2192 WRITE32(3);
2193 WRITE32(word0);
2194 WRITE32(word1);
2195 WRITE32(word2);
2196 }
1da177e4
LT		 2197 }
2198 if (bmval0 & FATTR4_WORD0_TYPE) {
2199 if ((buflen -= 4) < 0)
2200 goto out_resource;
3d2544b1 2201 dummy = nfs4_file_type(stat.mode);
1da177e4
LT		 2202 if (dummy == NF4BAD)
2203 goto out_serverfault;
2204 WRITE32(dummy);
2205 }
2206 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
2207 if ((buflen -= 4) < 0)
2208 goto out_resource;
49640001 2209 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
e34ac862 2210 WRITE32(NFS4_FH_PERSISTENT);
49640001 2211 else
e34ac862 2212 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1da177e4
LT		 2213 }
2214 if (bmval0 & FATTR4_WORD0_CHANGE) {
1da177e4
LT		 2215 if ((buflen -= 8) < 0)
2216 goto out_resource;
c654b8a9 2217 write_change(&p, &stat, dentry->d_inode);
1da177e4
LT		 2218 }
2219 if (bmval0 & FATTR4_WORD0_SIZE) {
2220 if ((buflen -= 8) < 0)
2221 goto out_resource;
2222 WRITE64(stat.size);
2223 }
2224 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
2225 if ((buflen -= 4) < 0)
2226 goto out_resource;
2227 WRITE32(1);
2228 }
2229 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
2230 if ((buflen -= 4) < 0)
2231 goto out_resource;
2232 WRITE32(1);
2233 }
2234 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
2235 if ((buflen -= 4) < 0)
2236 goto out_resource;
2237 WRITE32(0);
2238 }
2239 if (bmval0 & FATTR4_WORD0_FSID) {
2240 if ((buflen -= 16) < 0)
2241 goto out_resource;
42ca0993
BF		 2242 if (exp->ex_fslocs.migrated) {
2243 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
2244 WRITE64(NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 2245 } else switch(fsid_source(fhp)) {
2246 case FSIDSOURCE_FSID:
1da177e4
LT		 2247 WRITE64((u64)exp->ex_fsid);
2248 WRITE64((u64)0);
af6a4e28
N		 2249 break;
2250 case FSIDSOURCE_DEV:
1da177e4
LT		 2251 WRITE32(0);
2252 WRITE32(MAJOR(stat.dev));
2253 WRITE32(0);
2254 WRITE32(MINOR(stat.dev));
af6a4e28
N		 2255 break;
2256 case FSIDSOURCE_UUID:
2257 WRITEMEM(exp->ex_uuid, 16);
2258 break;
1da177e4
LT		 2259 }
2260 }
2261 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
2262 if ((buflen -= 4) < 0)
2263 goto out_resource;
2264 WRITE32(0);
2265 }
2266 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
2267 if ((buflen -= 4) < 0)
2268 goto out_resource;
3d733711 2269 WRITE32(nn->nfsd4_lease);
1da177e4
LT		 2270 }
2271 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
2272 if ((buflen -= 4) < 0)
2273 goto out_resource;
42ca0993 2274 WRITE32(rdattr_err);
1da177e4
LT		 2275 }
2276 if (bmval0 & FATTR4_WORD0_ACL) {
2277 struct nfs4_ace *ace;
1da177e4
LT		 2278
2279 if (acl == NULL) {
2280 if ((buflen -= 4) < 0)
2281 goto out_resource;
2282
2283 WRITE32(0);
2284 goto out_acl;
2285 }
2286 if ((buflen -= 4) < 0)
2287 goto out_resource;
2288 WRITE32(acl->naces);
2289
28e05dd8 2290 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
1da177e4
LT		 2291 if ((buflen -= 4*3) < 0)
2292 goto out_resource;
2293 WRITE32(ace->type);
2294 WRITE32(ace->flag);
2295 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
ab8e4aee 2296 status = nfsd4_encode_aclname(rqstp, ace, &p, &buflen);
1da177e4
LT		 2297 if (status == nfserr_resource)
2298 goto out_resource;
2299 if (status)
2300 goto out;
2301 }
2302 }
2303out_acl:
2304 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
2305 if ((buflen -= 4) < 0)
2306 goto out_resource;
2307 WRITE32(aclsupport ?
2308 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2309 }
2310 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
2311 if ((buflen -= 4) < 0)
2312 goto out_resource;
2313 WRITE32(1);
2314 }
2315 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
2316 if ((buflen -= 4) < 0)
2317 goto out_resource;
2930d381 2318 WRITE32(0);
1da177e4
LT		 2319 }
2320 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
2321 if ((buflen -= 4) < 0)
2322 goto out_resource;
2323 WRITE32(1);
2324 }
2325 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2326 if ((buflen -= 4) < 0)
2327 goto out_resource;
2328 WRITE32(1);
2329 }
2330 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2331 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
2332 if (buflen < 0)
2333 goto out_resource;
2334 WRITE32(fhp->fh_handle.fh_size);
2335 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
2336 }
2337 if (bmval0 & FATTR4_WORD0_FILEID) {
2338 if ((buflen -= 8) < 0)
2339 goto out_resource;
40ee5dc6 2340 WRITE64(stat.ino);
1da177e4
LT		 2341 }
2342 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2343 if ((buflen -= 8) < 0)
2344 goto out_resource;
2345 WRITE64((u64) statfs.f_ffree);
2346 }
2347 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2348 if ((buflen -= 8) < 0)
2349 goto out_resource;
2350 WRITE64((u64) statfs.f_ffree);
2351 }
2352 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2353 if ((buflen -= 8) < 0)
2354 goto out_resource;
2355 WRITE64((u64) statfs.f_files);
2356 }
81c3f413
BF		 2357 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2358 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
2359 if (status == nfserr_resource)
2360 goto out_resource;
2361 if (status)
2362 goto out;
2363 }
1da177e4
LT		 2364 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2365 if ((buflen -= 4) < 0)
2366 goto out_resource;
2367 WRITE32(1);
2368 }
2369 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2370 if ((buflen -= 8) < 0)
2371 goto out_resource;
2372 WRITE64(~(u64)0);
2373 }
2374 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2375 if ((buflen -= 4) < 0)
2376 goto out_resource;
2377 WRITE32(255);
2378 }
2379 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2380 if ((buflen -= 4) < 0)
2381 goto out_resource;
a16e92ed 2382 WRITE32(statfs.f_namelen);
1da177e4
LT		 2383 }
2384 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2385 if ((buflen -= 8) < 0)
2386 goto out_resource;
7adae489 2387 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 2388 }
2389 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2390 if ((buflen -= 8) < 0)
2391 goto out_resource;
7adae489 2392 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 2393 }
2394 if (bmval1 & FATTR4_WORD1_MODE) {
2395 if ((buflen -= 4) < 0)
2396 goto out_resource;
2397 WRITE32(stat.mode & S_IALLUGO);
2398 }
2399 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2400 if ((buflen -= 4) < 0)
2401 goto out_resource;
2402 WRITE32(1);
2403 }
2404 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2405 if ((buflen -= 4) < 0)
2406 goto out_resource;
2407 WRITE32(stat.nlink);
2408 }
2409 if (bmval1 & FATTR4_WORD1_OWNER) {
2410 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
2411 if (status == nfserr_resource)
2412 goto out_resource;
2413 if (status)
2414 goto out;
2415 }
2416 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2417 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
2418 if (status == nfserr_resource)
2419 goto out_resource;
2420 if (status)
2421 goto out;
2422 }
2423 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2424 if ((buflen -= 8) < 0)
2425 goto out_resource;
2426 WRITE32((u32) MAJOR(stat.rdev));
2427 WRITE32((u32) MINOR(stat.rdev));
2428 }
2429 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2430 if ((buflen -= 8) < 0)
2431 goto out_resource;
2432 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2433 WRITE64(dummy64);
2434 }
2435 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2436 if ((buflen -= 8) < 0)
2437 goto out_resource;
2438 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2439 WRITE64(dummy64);
2440 }
2441 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2442 if ((buflen -= 8) < 0)
2443 goto out_resource;
2444 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2445 WRITE64(dummy64);
2446 }
2447 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2448 if ((buflen -= 8) < 0)
2449 goto out_resource;
2450 dummy64 = (u64)stat.blocks << 9;
2451 WRITE64(dummy64);
2452 }
2453 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2454 if ((buflen -= 12) < 0)
2455 goto out_resource;
bf8d9097 2456 WRITE64((s64)stat.atime.tv_sec);
1da177e4
LT		 2457 WRITE32(stat.atime.tv_nsec);
2458 }
2459 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2460 if ((buflen -= 12) < 0)
2461 goto out_resource;
2462 WRITE32(0);
2463 WRITE32(1);
2464 WRITE32(0);
2465 }
2466 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2467 if ((buflen -= 12) < 0)
2468 goto out_resource;
bf8d9097 2469 WRITE64((s64)stat.ctime.tv_sec);
1da177e4
LT		 2470 WRITE32(stat.ctime.tv_nsec);
2471 }
2472 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2473 if ((buflen -= 12) < 0)
2474 goto out_resource;
bf8d9097 2475 WRITE64((s64)stat.mtime.tv_sec);
1da177e4
LT		 2476 WRITE32(stat.mtime.tv_nsec);
2477 }
2478 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
1da177e4
LT		 2479 if ((buflen -= 8) < 0)
2480 goto out_resource;
406a7ea9
FF		 2481 /*
2482 * Get parent's attributes if not ignoring crossmount
2483 * and this is the root of a cross-mounted filesystem.
2484 */
2485 if (ignore_crossmnt == 0 &&
ae7095a7
BF		 2486 dentry == exp->ex_path.mnt->mnt_root)
2487 get_parent_attributes(exp, &stat);
40ee5dc6 2488 WRITE64(stat.ino);
1da177e4 2489 }
18032ca0
DQ		 2490 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2491 status = nfsd4_encode_security_label(rqstp, context,
2492 contextlen, &p, &buflen);
2493 if (status)
2494 goto out;
2495 }
8c18f205
BH		 2496 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2497 WRITE32(3);
2498 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2499 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2500 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2501 }
7e705706 2502
1da177e4 2503 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
84822d0b 2504 *buffer = p;
1da177e4
LT		 2505 status = nfs_ok;
2506
2507out:
ba4e55bb 2508#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
18032ca0
DQ		 2509 if (context)
2510 security_release_secctx(context, contextlen);
ba4e55bb 2511#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
28e05dd8 2512 kfree(acl);
1da177e4
LT		 2513 if (fhp == &tempfh)
2514 fh_put(&tempfh);
2515 return status;
2516out_nfserr:
b8dd7b9a 2517 status = nfserrno(err);
1da177e4
LT		 2518 goto out;
2519out_resource:
1da177e4
LT		 2520 status = nfserr_resource;
2521 goto out;
2522out_serverfault:
2523 status = nfserr_serverfault;
2524 goto out;
2525}
2526
c0ce6ec8
BF		 2527static inline int attributes_need_mount(u32 *bmval)
2528{
2529 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2530 return 1;
2531 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2532 return 1;
2533 return 0;
2534}
2535
b37ad28b 2536static __be32
1da177e4 2537nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
84822d0b 2538 const char *name, int namlen, __be32 **p, int buflen)
1da177e4
LT		 2539{
2540 struct svc_export *exp = cd->rd_fhp->fh_export;
2541 struct dentry *dentry;
b37ad28b 2542 __be32 nfserr;
406a7ea9 2543 int ignore_crossmnt = 0;
1da177e4
LT		 2544
2545 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2546 if (IS_ERR(dentry))
2547 return nfserrno(PTR_ERR(dentry));
b2c0cea6
BF		 2548 if (!dentry->d_inode) {
2549 /*
2550 * nfsd_buffered_readdir drops the i_mutex between
2551 * readdir and calling this callback, leaving a window
2552 * where this directory entry could have gone away.
2553 */
2554 dput(dentry);
2555 return nfserr_noent;
2556 }
1da177e4
LT		 2557
2558 exp_get(exp);
406a7ea9
FF		 2559 /*
2560 * In the case of a mountpoint, the client may be asking for
2561 * attributes that are only properties of the underlying filesystem
2562 * as opposed to the cross-mounted file system. In such a case,
2563 * we will not follow the cross mount and will fill the attribtutes
2564 * directly from the mountpoint dentry.
2565 */
3227fa41 2566 if (nfsd_mountpoint(dentry, exp)) {
021d3a72
BF		 2567 int err;
2568
3227fa41
BF		 2569 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2570 && !attributes_need_mount(cd->rd_bmval)) {
2571 ignore_crossmnt = 1;
2572 goto out_encode;
2573 }
dcb488a3
AA		 2574 /*
2575 * Why the heck aren't we just using nfsd_lookup??
2576 * Different "."/".." handling? Something else?
2577 * At least, add a comment here to explain....
2578 */
021d3a72
BF		 2579 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2580 if (err) {
2581 nfserr = nfserrno(err);
1da177e4
LT		 2582 goto out_put;
2583 }
dcb488a3
AA		 2584 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2585 if (nfserr)
2586 goto out_put;
1da177e4
LT		 2587
2588 }
3227fa41 2589out_encode:
1da177e4 2590 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
406a7ea9 2591 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 2592out_put:
2593 dput(dentry);
2594 exp_put(exp);
2595 return nfserr;
2596}
2597
2ebbc012 2598static __be32 *
b37ad28b 2599nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
1da177e4 2600{
2ebbc012 2601 __be32 *attrlenp;
1da177e4
LT		 2602
2603 if (buflen < 6)
2604 return NULL;
2605 *p++ = htonl(2);
2606 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2607 *p++ = htonl(0); /* bmval1 */
2608
2609 attrlenp = p++;
2610 *p++ = nfserr; /* no htonl */
2611 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2612 return p;
2613}
2614
2615static int
a0ad13ef
N		 2616nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2617 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 2618{
a0ad13ef 2619 struct readdir_cd *ccd = ccdv;
1da177e4
LT		 2620 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2621 int buflen;
2ebbc012 2622 __be32 *p = cd->buffer;
b2c0cea6 2623 __be32 *cookiep;
b37ad28b 2624 __be32 nfserr = nfserr_toosmall;
1da177e4
LT		 2625
2626 /* In nfsv4, "." and ".." never make it onto the wire.. */
2627 if (name && isdotent(name, namlen)) {
2628 cd->common.err = nfs_ok;
2629 return 0;
2630 }
2631
2632 if (cd->offset)
2633 xdr_encode_hyper(cd->offset, (u64) offset);
2634
2635 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2636 if (buflen < 0)
2637 goto fail;
2638
2639 *p++ = xdr_one; /* mark entry present */
b2c0cea6 2640 cookiep = p;
1da177e4
LT		 2641 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2642 p = xdr_encode_array(p, name, namlen); /* name length & name */
2643
84822d0b 2644 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, &p, buflen);
1da177e4
LT		 2645 switch (nfserr) {
2646 case nfs_ok:
1da177e4
LT		 2647 break;
2648 case nfserr_resource:
2649 nfserr = nfserr_toosmall;
2650 goto fail;
b2c0cea6
BF		 2651 case nfserr_noent:
2652 goto skip_entry;
1da177e4
LT		 2653 default:
2654 /*
2655 * If the client requested the RDATTR_ERROR attribute,
2656 * we stuff the error code into this attribute
2657 * and continue. If this attribute was not requested,
2658 * then in accordance with the spec, we fail the
2659 * entire READDIR operation(!)
2660 */
2661 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2662 goto fail;
1da177e4 2663 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
34081efc
FI		 2664 if (p == NULL) {
2665 nfserr = nfserr_toosmall;
1da177e4 2666 goto fail;
34081efc 2667 }
1da177e4
LT		 2668 }
2669 cd->buflen -= (p - cd->buffer);
2670 cd->buffer = p;
b2c0cea6
BF		 2671 cd->offset = cookiep;
2672skip_entry:
1da177e4
LT		 2673 cd->common.err = nfs_ok;
2674 return 0;
2675fail:
2676 cd->common.err = nfserr;
2677 return -EINVAL;
2678}
2679
e2f282b9
BH		 2680static void
2681nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2682{
bc749ca4 2683 __be32 *p;
e2f282b9
BH		 2684
2685 RESERVE_SPACE(sizeof(stateid_t));
2686 WRITE32(sid->si_generation);
2687 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2688 ADJUST_ARGS();
2689}
2690
695e12f8 2691static __be32
b37ad28b 2692nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4 2693{
bc749ca4 2694 __be32 *p;
1da177e4
LT		 2695
2696 if (!nfserr) {
2697 RESERVE_SPACE(8);
2698 WRITE32(access->ac_supported);
2699 WRITE32(access->ac_resp_access);
2700 ADJUST_ARGS();
2701 }
695e12f8 2702 return nfserr;
1da177e4
LT		 2703}
2704
1d1bc8f2
BF		 2705static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
2706{
2707 __be32 *p;
2708
2709 if (!nfserr) {
2710 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 8);
2711 WRITEMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
2712 WRITE32(bcts->dir);
6e67b5d1 2713 /* Sorry, we do not yet support RDMA over 4.1: */
1d1bc8f2
BF		 2714 WRITE32(0);
2715 ADJUST_ARGS();
2716 }
2717 return nfserr;
2718}
2719
695e12f8 2720static __be32
b37ad28b 2721nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4 2722{
e2f282b9
BH		 2723 if (!nfserr)
2724 nfsd4_encode_stateid(resp, &close->cl_stateid);
2725
695e12f8 2726 return nfserr;
1da177e4
LT		 2727}
2728
2729
695e12f8 2730static __be32
b37ad28b 2731nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4 2732{
bc749ca4 2733 __be32 *p;
1da177e4
LT		 2734
2735 if (!nfserr) {
ab4684d1
CL		 2736 RESERVE_SPACE(NFS4_VERIFIER_SIZE);
2737 WRITEMEM(commit->co_verf.data, NFS4_VERIFIER_SIZE);
1da177e4
LT		 2738 ADJUST_ARGS();
2739 }
695e12f8 2740 return nfserr;
1da177e4
LT		 2741}
2742
695e12f8 2743static __be32
b37ad28b 2744nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4 2745{
bc749ca4 2746 __be32 *p;
1da177e4
LT		 2747
2748 if (!nfserr) {
2749 RESERVE_SPACE(32);
c654b8a9 2750 write_cinfo(&p, &create->cr_cinfo);
1da177e4
LT		 2751 WRITE32(2);
2752 WRITE32(create->cr_bmval[0]);
2753 WRITE32(create->cr_bmval[1]);
2754 ADJUST_ARGS();
2755 }
695e12f8 2756 return nfserr;
1da177e4
LT		 2757}
2758
b37ad28b
AV		 2759static __be32
2760nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 2761{
2762 struct svc_fh *fhp = getattr->ga_fhp;
2763 int buflen;
2764
2765 if (nfserr)
2766 return nfserr;
2767
2768 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2769 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
84822d0b 2770 &resp->p, buflen, getattr->ga_bmval,
406a7ea9 2771 resp->rqstp, 0);
1da177e4
LT		 2772 return nfserr;
2773}
2774
695e12f8
BH		 2775static __be32
2776nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
1da177e4 2777{
695e12f8 2778 struct svc_fh *fhp = *fhpp;
1da177e4 2779 unsigned int len;
bc749ca4 2780 __be32 *p;
1da177e4
LT		 2781
2782 if (!nfserr) {
2783 len = fhp->fh_handle.fh_size;
2784 RESERVE_SPACE(len + 4);
2785 WRITE32(len);
2786 WRITEMEM(&fhp->fh_handle.fh_base, len);
2787 ADJUST_ARGS();
2788 }
695e12f8 2789 return nfserr;
1da177e4
LT		 2790}
2791
2792/*
2793* Including all fields other than the name, a LOCK4denied structure requires
2794* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2795*/
2796static void
2797nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2798{
7c13f344 2799 struct xdr_netobj *conf = &ld->ld_owner;
bc749ca4 2800 __be32 *p;
1da177e4 2801
7c13f344 2802 RESERVE_SPACE(32 + XDR_LEN(conf->len));
1da177e4
LT		 2803 WRITE64(ld->ld_start);
2804 WRITE64(ld->ld_length);
2805 WRITE32(ld->ld_type);
7c13f344 2806 if (conf->len) {
1da177e4 2807 WRITEMEM(&ld->ld_clientid, 8);
7c13f344
BF		 2808 WRITE32(conf->len);
2809 WRITEMEM(conf->data, conf->len);
2810 kfree(conf->data);
1da177e4
LT		 2811 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2812 WRITE64((u64)0); /* clientid */
2813 WRITE32(0); /* length of owner name */
2814 }
2815 ADJUST_ARGS();
2816}
2817
695e12f8 2818static __be32
b37ad28b 2819nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 2820{
e2f282b9
BH		 2821 if (!nfserr)
2822 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2823 else if (nfserr == nfserr_denied)
1da177e4
LT		 2824 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2825
695e12f8 2826 return nfserr;
1da177e4
LT		 2827}
2828
695e12f8 2829static __be32
b37ad28b 2830nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4
LT		 2831{
2832 if (nfserr == nfserr_denied)
2833 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
695e12f8 2834 return nfserr;
1da177e4
LT		 2835}
2836
695e12f8 2837static __be32
b37ad28b 2838nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4 2839{
e2f282b9
BH		 2840 if (!nfserr)
2841 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2842
695e12f8 2843 return nfserr;
1da177e4
LT		 2844}
2845
2846
695e12f8 2847static __be32
b37ad28b 2848nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4 2849{
bc749ca4 2850 __be32 *p;
1da177e4
LT		 2851
2852 if (!nfserr) {
2853 RESERVE_SPACE(20);
c654b8a9 2854 write_cinfo(&p, &link->li_cinfo);
1da177e4
LT		 2855 ADJUST_ARGS();
2856 }
695e12f8 2857 return nfserr;
1da177e4
LT		 2858}
2859
2860
695e12f8 2861static __be32
b37ad28b 2862nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4 2863{
bc749ca4 2864 __be32 *p;
1da177e4
LT		 2865
2866 if (nfserr)
2867 goto out;
2868
e2f282b9
BH		 2869 nfsd4_encode_stateid(resp, &open->op_stateid);
2870 RESERVE_SPACE(40);
c654b8a9 2871 write_cinfo(&p, &open->op_cinfo);
1da177e4
LT		 2872 WRITE32(open->op_rflags);
2873 WRITE32(2);
2874 WRITE32(open->op_bmval[0]);
2875 WRITE32(open->op_bmval[1]);
2876 WRITE32(open->op_delegate_type);
2877 ADJUST_ARGS();
2878
2879 switch (open->op_delegate_type) {
2880 case NFS4_OPEN_DELEGATE_NONE:
2881 break;
2882 case NFS4_OPEN_DELEGATE_READ:
e2f282b9
BH		 2883 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2884 RESERVE_SPACE(20);
7b190fec 2885 WRITE32(open->op_recall);
1da177e4
LT		 2886
2887 /*
2888 * TODO: ACE's in delegations
2889 */
2890 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2891 WRITE32(0);
2892 WRITE32(0);
2893 WRITE32(0); /* XXX: is NULL principal ok? */
2894 ADJUST_ARGS();
2895 break;
2896 case NFS4_OPEN_DELEGATE_WRITE:
e2f282b9
BH		 2897 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2898 RESERVE_SPACE(32);
1da177e4
LT		 2899 WRITE32(0);
2900
2901 /*
2902 * TODO: space_limit's in delegations
2903 */
2904 WRITE32(NFS4_LIMIT_SIZE);
2905 WRITE32(~(u32)0);
2906 WRITE32(~(u32)0);
2907
2908 /*
2909 * TODO: ACE's in delegations
2910 */
2911 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2912 WRITE32(0);
2913 WRITE32(0);
2914 WRITE32(0); /* XXX: is NULL principal ok? */
2915 ADJUST_ARGS();
2916 break;
d24433cd
BH		 2917 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
2918 switch (open->op_why_no_deleg) {
2919 case WND4_CONTENTION:
2920 case WND4_RESOURCE:
2921 RESERVE_SPACE(8);
2922 WRITE32(open->op_why_no_deleg);
2923 WRITE32(0); /* deleg signaling not supported yet */
2924 break;
2925 default:
2926 RESERVE_SPACE(4);
2927 WRITE32(open->op_why_no_deleg);
2928 }
2929 ADJUST_ARGS();
2930 break;
1da177e4
LT		 2931 default:
2932 BUG();
2933 }
2934 /* XXX save filehandle here */
2935out:
695e12f8 2936 return nfserr;
1da177e4
LT		 2937}
2938
695e12f8 2939static __be32
b37ad28b 2940nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4 2941{
e2f282b9
BH		 2942 if (!nfserr)
2943 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
1da177e4 2944
695e12f8 2945 return nfserr;
1da177e4
LT		 2946}
2947
695e12f8 2948static __be32
b37ad28b 2949nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4 2950{
e2f282b9
BH		 2951 if (!nfserr)
2952 nfsd4_encode_stateid(resp, &od->od_stateid);
1da177e4 2953
695e12f8 2954 return nfserr;
1da177e4
LT		 2955}
2956
b37ad28b
AV		 2957static __be32
2958nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
44524359 2959 struct nfsd4_read *read)
1da177e4
LT		 2960{
2961 u32 eof;
afc59400
BF		 2962 int v;
2963 struct page *page;
1da177e4
LT		 2964 unsigned long maxcount;
2965 long len;
bc749ca4 2966 __be32 *p;
1da177e4
LT		 2967
2968 if (nfserr)
2969 return nfserr;
2970 if (resp->xbuf->page_len)
2971 return nfserr_resource;
2972
2973 RESERVE_SPACE(8); /* eof flag and byte count */
2974
7adae489 2975 maxcount = svc_max_payload(resp->rqstp);
1da177e4
LT		 2976 if (maxcount > read->rd_length)
2977 maxcount = read->rd_length;
2978
2979 len = maxcount;
2980 v = 0;
2981 while (len > 0) {
afc59400
BF		 2982 page = *(resp->rqstp->rq_next_page);
2983 if (!page) { /* ran out of pages */
d5f50b0c
BF		 2984 maxcount -= len;
2985 break;
2986 }
afc59400 2987 resp->rqstp->rq_vec[v].iov_base = page_address(page);
3cc03b16 2988 resp->rqstp->rq_vec[v].iov_len =
44524359 2989 len < PAGE_SIZE ? len : PAGE_SIZE;
afc59400 2990 resp->rqstp->rq_next_page++;
1da177e4
LT		 2991 v++;
2992 len -= PAGE_SIZE;
2993 }
2994 read->rd_vlen = v;
2995
039a87ca 2996 nfserr = nfsd_read_file(read->rd_rqstp, read->rd_fhp, read->rd_filp,
3cc03b16 2997 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
1da177e4
LT		 2998 &maxcount);
2999
1da177e4
LT		 3000 if (nfserr)
3001 return nfserr;
44524359
N		 3002 eof = (read->rd_offset + maxcount >=
3003 read->rd_fhp->fh_dentry->d_inode->i_size);
1da177e4
LT		 3004
3005 WRITE32(eof);
3006 WRITE32(maxcount);
3007 ADJUST_ARGS();
6ed6decc
N		 3008 resp->xbuf->head[0].iov_len = (char*)p
3009 - (char*)resp->xbuf->head[0].iov_base;
1da177e4
LT		 3010 resp->xbuf->page_len = maxcount;
3011
6ed6decc 3012 /* Use rest of head for padding and remaining ops: */
6ed6decc 3013 resp->xbuf->tail[0].iov_base = p;
1da177e4 3014 resp->xbuf->tail[0].iov_len = 0;
1da177e4 3015 if (maxcount&3) {
6ed6decc
N		 3016 RESERVE_SPACE(4);
3017 WRITE32(0);
1da177e4
LT		 3018 resp->xbuf->tail[0].iov_base += maxcount&3;
3019 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 3020 ADJUST_ARGS();
1da177e4
LT		 3021 }
3022 return 0;
3023}
3024
b37ad28b
AV		 3025static __be32
3026nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 3027{
3028 int maxcount;
3029 char *page;
bc749ca4 3030 __be32 *p;
1da177e4
LT		 3031
3032 if (nfserr)
3033 return nfserr;
3034 if (resp->xbuf->page_len)
3035 return nfserr_resource;
afc59400 3036 if (!*resp->rqstp->rq_next_page)
d5f50b0c 3037 return nfserr_resource;
1da177e4 3038
afc59400 3039 page = page_address(*(resp->rqstp->rq_next_page++));
1da177e4
LT		 3040
3041 maxcount = PAGE_SIZE;
3042 RESERVE_SPACE(4);
3043
3044 /*
3045 * XXX: By default, the ->readlink() VFS op will truncate symlinks
3046 * if they would overflow the buffer. Is this kosher in NFSv4? If
3047 * not, one easy fix is: if ->readlink() precisely fills the buffer,
3048 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
3049 */
3050 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
3051 if (nfserr == nfserr_isdir)
3052 return nfserr_inval;
3053 if (nfserr)
3054 return nfserr;
3055
3056 WRITE32(maxcount);
3057 ADJUST_ARGS();
6ed6decc
N		 3058 resp->xbuf->head[0].iov_len = (char*)p
3059 - (char*)resp->xbuf->head[0].iov_base;
3060 resp->xbuf->page_len = maxcount;
1da177e4 3061
6ed6decc 3062 /* Use rest of head for padding and remaining ops: */
6ed6decc 3063 resp->xbuf->tail[0].iov_base = p;
1da177e4 3064 resp->xbuf->tail[0].iov_len = 0;
1da177e4 3065 if (maxcount&3) {
6ed6decc
N		 3066 RESERVE_SPACE(4);
3067 WRITE32(0);
1da177e4
LT		 3068 resp->xbuf->tail[0].iov_base += maxcount&3;
3069 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 3070 ADJUST_ARGS();
1da177e4
LT		 3071 }
3072 return 0;
3073}
3074
b37ad28b
AV		 3075static __be32
3076nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 3077{
3078 int maxcount;
3079 loff_t offset;
2ebbc012 3080 __be32 *page, *savep, *tailbase;
bc749ca4 3081 __be32 *p;
1da177e4
LT		 3082
3083 if (nfserr)
3084 return nfserr;
3085 if (resp->xbuf->page_len)
3086 return nfserr_resource;
afc59400 3087 if (!*resp->rqstp->rq_next_page)
d5f50b0c 3088 return nfserr_resource;
1da177e4 3089
ab4684d1 3090 RESERVE_SPACE(NFS4_VERIFIER_SIZE);
1da177e4
LT		 3091 savep = p;
3092
3093 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
3094 WRITE32(0);
3095 WRITE32(0);
3096 ADJUST_ARGS();
3097 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
bb6e8a9f 3098 tailbase = p;
1da177e4
LT		 3099
3100 maxcount = PAGE_SIZE;
3101 if (maxcount > readdir->rd_maxcount)
3102 maxcount = readdir->rd_maxcount;
3103
3104 /*
3105 * Convert from bytes to words, account for the two words already
3106 * written, make sure to leave two words at the end for the next
3107 * pointer and eof field.
3108 */
3109 maxcount = (maxcount >> 2) - 4;
3110 if (maxcount < 0) {
3111 nfserr = nfserr_toosmall;
3112 goto err_no_verf;
3113 }
3114
afc59400 3115 page = page_address(*(resp->rqstp->rq_next_page++));
1da177e4
LT		 3116 readdir->common.err = 0;
3117 readdir->buflen = maxcount;
3118 readdir->buffer = page;
3119 readdir->offset = NULL;
3120
3121 offset = readdir->rd_cookie;
3122 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3123 &offset,
3124 &readdir->common, nfsd4_encode_dirent);
3125 if (nfserr == nfs_ok &&
3126 readdir->common.err == nfserr_toosmall &&
3127 readdir->buffer == page)
3128 nfserr = nfserr_toosmall;
1da177e4
LT		 3129 if (nfserr)
3130 goto err_no_verf;
3131
3132 if (readdir->offset)
3133 xdr_encode_hyper(readdir->offset, offset);
3134
3135 p = readdir->buffer;
3136 *p++ = 0; /* no more entries */
3137 *p++ = htonl(readdir->common.err == nfserr_eof);
afc59400
BF		 3138 resp->xbuf->page_len = ((char*)p) -
3139 (char*)page_address(*(resp->rqstp->rq_next_page-1));
1da177e4 3140
bb6e8a9f 3141 /* Use rest of head for padding and remaining ops: */
bb6e8a9f 3142 resp->xbuf->tail[0].iov_base = tailbase;
1da177e4
LT		 3143 resp->xbuf->tail[0].iov_len = 0;
3144 resp->p = resp->xbuf->tail[0].iov_base;
bb6e8a9f 3145 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
1da177e4
LT		 3146
3147 return 0;
3148err_no_verf:
3149 p = savep;
3150 ADJUST_ARGS();
3151 return nfserr;
3152}
3153
695e12f8 3154static __be32
b37ad28b 3155nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4 3156{
bc749ca4 3157 __be32 *p;
1da177e4
LT		 3158
3159 if (!nfserr) {
3160 RESERVE_SPACE(20);
c654b8a9 3161 write_cinfo(&p, &remove->rm_cinfo);
1da177e4
LT		 3162 ADJUST_ARGS();
3163 }
695e12f8 3164 return nfserr;
1da177e4
LT		 3165}
3166
695e12f8 3167static __be32
b37ad28b 3168nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4 3169{
bc749ca4 3170 __be32 *p;
1da177e4
LT		 3171
3172 if (!nfserr) {
3173 RESERVE_SPACE(40);
c654b8a9
BF		 3174 write_cinfo(&p, &rename->rn_sinfo);
3175 write_cinfo(&p, &rename->rn_tinfo);
1da177e4
LT		 3176 ADJUST_ARGS();
3177 }
695e12f8 3178 return nfserr;
1da177e4
LT		 3179}
3180
695e12f8 3181static __be32
22b6dee8 3182nfsd4_do_encode_secinfo(struct nfsd4_compoundres *resp,
a77c806f 3183 __be32 nfserr, struct svc_export *exp)
dcb488a3 3184{
676e4ebd 3185 u32 i, nflavs, supported;
4796f457
BF		 3186 struct exp_flavor_info *flavs;
3187 struct exp_flavor_info def_flavs[2];
676e4ebd
CL		 3188 __be32 *p, *flavorsp;
3189 static bool report = true;
dcb488a3
AA		 3190
3191 if (nfserr)
3192 goto out;
4796f457
BF		 3193 if (exp->ex_nflavors) {
3194 flavs = exp->ex_flavors;
3195 nflavs = exp->ex_nflavors;
3196 } else { /* Handling of some defaults in absence of real secinfo: */
3197 flavs = def_flavs;
3198 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3199 nflavs = 2;
3200 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3201 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3202 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3203 nflavs = 1;
3204 flavs[0].pseudoflavor
3205 = svcauth_gss_flavor(exp->ex_client);
3206 } else {
3207 nflavs = 1;
3208 flavs[0].pseudoflavor
3209 = exp->ex_client->flavour->flavour;
3210 }
3211 }
3212
676e4ebd 3213 supported = 0;
dcb488a3 3214 RESERVE_SPACE(4);
676e4ebd 3215 flavorsp = p++; /* to be backfilled later */
dcb488a3 3216 ADJUST_ARGS();
676e4ebd 3217
4796f457 3218 for (i = 0; i < nflavs; i++) {
676e4ebd 3219 rpc_authflavor_t pf = flavs[i].pseudoflavor;
a77c806f 3220 struct rpcsec_gss_info info;
dcb488a3 3221
676e4ebd
CL		 3222 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3223 supported++;
ed9411a0 3224 RESERVE_SPACE(4 + 4 + info.oid.len + 4 + 4);
dcb488a3 3225 WRITE32(RPC_AUTH_GSS);
a77c806f
CL		 3226 WRITE32(info.oid.len);
3227 WRITEMEM(info.oid.data, info.oid.len);
a77c806f 3228 WRITE32(info.qop);
a77c806f 3229 WRITE32(info.service);
dcb488a3 3230 ADJUST_ARGS();
676e4ebd
CL		 3231 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3232 supported++;
dcb488a3 3233 RESERVE_SPACE(4);
676e4ebd 3234 WRITE32(pf);
dcb488a3 3235 ADJUST_ARGS();
676e4ebd
CL		 3236 } else {
3237 if (report)
3238 pr_warn("NFS: SECINFO: security flavor %u "
3239 "is not supported\n", pf);
dcb488a3
AA		 3240 }
3241 }
a77c806f 3242
676e4ebd
CL		 3243 if (nflavs != supported)
3244 report = false;
3245 *flavorsp = htonl(supported);
3246
dcb488a3
AA		 3247out:
3248 if (exp)
3249 exp_put(exp);
695e12f8 3250 return nfserr;
dcb488a3
AA		 3251}
3252
22b6dee8
MJ		 3253static __be32
3254nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3255 struct nfsd4_secinfo *secinfo)
3256{
3257 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->si_exp);
3258}
3259
3260static __be32
3261nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3262 struct nfsd4_secinfo_no_name *secinfo)
3263{
3264 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->sin_exp);
3265}
3266
1da177e4
LT		 3267/*
3268 * The SETATTR encode routine is special -- it always encodes a bitmap,
3269 * regardless of the error status.
3270 */
695e12f8 3271static __be32
b37ad28b 3272nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4 3273{
bc749ca4 3274 __be32 *p;
1da177e4 3275
18032ca0 3276 RESERVE_SPACE(16);
1da177e4 3277 if (nfserr) {
18032ca0
DQ		 3278 WRITE32(3);
3279 WRITE32(0);
1da177e4
LT		 3280 WRITE32(0);
3281 WRITE32(0);
3282 }
3283 else {
18032ca0 3284 WRITE32(3);
1da177e4
LT		 3285 WRITE32(setattr->sa_bmval[0]);
3286 WRITE32(setattr->sa_bmval[1]);
18032ca0 3287 WRITE32(setattr->sa_bmval[2]);
1da177e4
LT		 3288 }
3289 ADJUST_ARGS();
695e12f8 3290 return nfserr;
1da177e4
LT		 3291}
3292
695e12f8 3293static __be32
b37ad28b 3294nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4 3295{
bc749ca4 3296 __be32 *p;
1da177e4
LT		 3297
3298 if (!nfserr) {
ab4684d1 3299 RESERVE_SPACE(8 + NFS4_VERIFIER_SIZE);
1da177e4 3300 WRITEMEM(&scd->se_clientid, 8);
ab4684d1 3301 WRITEMEM(&scd->se_confirm, NFS4_VERIFIER_SIZE);
1da177e4
LT		 3302 ADJUST_ARGS();
3303 }
3304 else if (nfserr == nfserr_clid_inuse) {
3305 RESERVE_SPACE(8);
3306 WRITE32(0);
3307 WRITE32(0);
3308 ADJUST_ARGS();
3309 }
695e12f8 3310 return nfserr;
1da177e4
LT		 3311}
3312
695e12f8 3313static __be32
b37ad28b 3314nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4 3315{
bc749ca4 3316 __be32 *p;
1da177e4
LT		 3317
3318 if (!nfserr) {
3319 RESERVE_SPACE(16);
3320 WRITE32(write->wr_bytes_written);
3321 WRITE32(write->wr_how_written);
ab4684d1 3322 WRITEMEM(write->wr_verifier.data, NFS4_VERIFIER_SIZE);
1da177e4
LT		 3323 ADJUST_ARGS();
3324 }
695e12f8 3325 return nfserr;
1da177e4
LT		 3326}
3327
57266a6e
BF		 3328static const u32 nfs4_minimal_spo_must_enforce[2] = {
3329 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
3330 1 << (OP_EXCHANGE_ID - 32) |
3331 1 << (OP_CREATE_SESSION - 32) |
3332 1 << (OP_DESTROY_SESSION - 32) |
3333 1 << (OP_DESTROY_CLIENTID - 32)
3334};
3335
2db134eb 3336static __be32
57b7b43b 3337nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3338 struct nfsd4_exchange_id *exid)
3339{
bc749ca4 3340 __be32 *p;
0733d213
AA		 3341 char *major_id;
3342 char *server_scope;
3343 int major_id_sz;
3344 int server_scope_sz;
3345 uint64_t minor_id = 0;
3346
3347 if (nfserr)
3348 return nfserr;
3349
3350 major_id = utsname()->nodename;
3351 major_id_sz = strlen(major_id);
3352 server_scope = utsname()->nodename;
3353 server_scope_sz = strlen(server_scope);
3354
3355 RESERVE_SPACE(
3356 8 /* eir_clientid */ +
3357 4 /* eir_sequenceid */ +
3358 4 /* eir_flags */ +
3359 4 /* spr_how (SP4_NONE) */ +
3360 8 /* so_minor_id */ +
3361 4 /* so_major_id.len */ +
3362 (XDR_QUADLEN(major_id_sz) * 4) +
3363 4 /* eir_server_scope.len */ +
3364 (XDR_QUADLEN(server_scope_sz) * 4) +
3365 4 /* eir_server_impl_id.count (0) */);
3366
3367 WRITEMEM(&exid->clientid, 8);
3368 WRITE32(exid->seqid);
3369 WRITE32(exid->flags);
3370
3371 /* state_protect4_r. Currently only support SP4_NONE */
3372 BUG_ON(exid->spa_how != SP4_NONE);
3373 WRITE32(exid->spa_how);
57266a6e
BF		 3374 switch (exid->spa_how) {
3375 case SP4_NONE:
3376 break;
3377 case SP4_MACH_CRED:
3378 /* spo_must_enforce bitmap: */
3379 WRITE32(2);
3380 WRITE32(nfs4_minimal_spo_must_enforce[0]);
3381 WRITE32(nfs4_minimal_spo_must_enforce[1]);
3382 /* empty spo_must_allow bitmap: */
3383 WRITE32(0);
3384 break;
3385 default:
3386 WARN_ON_ONCE(1);
3387 }
0733d213
AA		 3388
3389 /* The server_owner struct */
3390 WRITE64(minor_id); /* Minor id */
3391 /* major id */
3392 WRITE32(major_id_sz);
3393 WRITEMEM(major_id, major_id_sz);
3394
3395 /* Server scope */
3396 WRITE32(server_scope_sz);
3397 WRITEMEM(server_scope, server_scope_sz);
3398
3399 /* Implementation id */
3400 WRITE32(0); /* zero length nfs_impl_id4 array */
3401 ADJUST_ARGS();
3402 return 0;
2db134eb
AA		 3403}
3404
3405static __be32
57b7b43b 3406nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3407 struct nfsd4_create_session *sess)
3408{
bc749ca4 3409 __be32 *p;
ec6b5d7b
AA		 3410
3411 if (nfserr)
3412 return nfserr;
3413
3414 RESERVE_SPACE(24);
3415 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3416 WRITE32(sess->seqid);
3417 WRITE32(sess->flags);
3418 ADJUST_ARGS();
3419
3420 RESERVE_SPACE(28);
3421 WRITE32(0); /* headerpadsz */
3422 WRITE32(sess->fore_channel.maxreq_sz);
3423 WRITE32(sess->fore_channel.maxresp_sz);
3424 WRITE32(sess->fore_channel.maxresp_cached);
3425 WRITE32(sess->fore_channel.maxops);
3426 WRITE32(sess->fore_channel.maxreqs);
3427 WRITE32(sess->fore_channel.nr_rdma_attrs);
3428 ADJUST_ARGS();
3429
3430 if (sess->fore_channel.nr_rdma_attrs) {
3431 RESERVE_SPACE(4);
3432 WRITE32(sess->fore_channel.rdma_attrs);
3433 ADJUST_ARGS();
3434 }
3435
3436 RESERVE_SPACE(28);
3437 WRITE32(0); /* headerpadsz */
3438 WRITE32(sess->back_channel.maxreq_sz);
3439 WRITE32(sess->back_channel.maxresp_sz);
3440 WRITE32(sess->back_channel.maxresp_cached);
3441 WRITE32(sess->back_channel.maxops);
3442 WRITE32(sess->back_channel.maxreqs);
3443 WRITE32(sess->back_channel.nr_rdma_attrs);
3444 ADJUST_ARGS();
3445
3446 if (sess->back_channel.nr_rdma_attrs) {
3447 RESERVE_SPACE(4);
3448 WRITE32(sess->back_channel.rdma_attrs);
3449 ADJUST_ARGS();
3450 }
3451 return 0;
2db134eb
AA		 3452}
3453
3454static __be32
57b7b43b 3455nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3456 struct nfsd4_destroy_session *destroy_session)
3457{
2db134eb
AA		 3458 return nfserr;
3459}
3460
e1ca12df 3461static __be32
d1829b38 3462nfsd4_encode_free_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
e1ca12df
BS		 3463 struct nfsd4_free_stateid *free_stateid)
3464{
3465 __be32 *p;
3466
3467 if (nfserr)
3468 return nfserr;
3469
3470 RESERVE_SPACE(4);
d1829b38 3471 *p++ = nfserr;
e1ca12df
BS		 3472 ADJUST_ARGS();
3473 return nfserr;
3474}
3475
c47d832b 3476static __be32
57b7b43b 3477nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3478 struct nfsd4_sequence *seq)
3479{
bc749ca4 3480 __be32 *p;
b85d4c01
BH		 3481
3482 if (nfserr)
3483 return nfserr;
3484
3485 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
3486 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3487 WRITE32(seq->seqid);
3488 WRITE32(seq->slotid);
b7d7ca35
BF		 3489 /* Note slotid's are numbered from zero: */
3490 WRITE32(seq->maxslots - 1); /* sr_highest_slotid */
3491 WRITE32(seq->maxslots - 1); /* sr_target_highest_slotid */
0d7bb719 3492 WRITE32(seq->status_flags);
b85d4c01
BH		 3493
3494 ADJUST_ARGS();
557ce264 3495 resp->cstate.datap = p; /* DRC cache data pointer */
b85d4c01 3496 return 0;
2db134eb
AA		 3497}
3498
2355c596 3499static __be32
57b7b43b 3500nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
17456804
BS		 3501 struct nfsd4_test_stateid *test_stateid)
3502{
03cfb420 3503 struct nfsd4_test_stateid_id *stateid, *next;
17456804 3504 __be32 *p;
17456804 3505
03cfb420 3506 RESERVE_SPACE(4 + (4 * test_stateid->ts_num_ids));
17456804 3507 *p++ = htonl(test_stateid->ts_num_ids);
17456804 3508
03cfb420 3509 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
02f5fde5 3510 *p++ = stateid->ts_id_status;
17456804 3511 }
17456804 3512
03cfb420 3513 ADJUST_ARGS();
17456804
BS		 3514 return nfserr;
3515}
3516
695e12f8
BH		 3517static __be32
3518nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3519{
3520 return nfserr;
3521}
3522
3523typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3524
2db134eb
AA		 3525/*
3526 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3527 * since we don't need to filter out obsolete ops as this is
3528 * done in the decoding phase.
3529 */
695e12f8 3530static nfsd4_enc nfsd4_enc_ops[] = {
ad1060c8
BF		 3531 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3532 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3533 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3534 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3535 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3536 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3537 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3538 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3539 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3540 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3541 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3542 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3543 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3544 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3545 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3546 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
84f09f46 3547 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
ad1060c8
BF		 3548 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3549 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3550 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3551 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3552 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3553 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3554 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3555 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3556 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3557 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3558 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3559 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3560 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3561 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3562 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3563 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3564 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3565 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3566 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3567 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 3568
3569 /* NFSv4.1 operations */
3570 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
1d1bc8f2 3571 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
2db134eb
AA		 3572 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3573 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3574 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
e1ca12df 3575 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_free_stateid,
2db134eb
AA		 3576 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3577 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3578 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3579 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3580 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3581 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
22b6dee8 3582 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
2db134eb
AA		 3583 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3584 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
17456804 3585 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
2db134eb
AA		 3586 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3587 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3588 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
695e12f8
BH		 3589};
3590
496c262c
AA		 3591/*
3592 * Calculate the total amount of memory that the compound response has taken
58e7b33a 3593 * after encoding the current operation with pad.
496c262c 3594 *
58e7b33a
MJ		 3595 * pad: if operation is non-idempotent, pad was calculate by op_rsize_bop()
3596 * which was specified at nfsd4_operation, else pad is zero.
496c262c 3597 *
58e7b33a 3598 * Compare this length to the session se_fmaxresp_sz and se_fmaxresp_cached.
496c262c
AA		 3599 *
3600 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
3601 * will be at least a page and will therefore hold the xdr_buf head.
3602 */
57b7b43b 3603__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 pad)
496c262c 3604{
496c262c 3605 struct xdr_buf *xb = &resp->rqstp->rq_res;
496c262c
AA		 3606 struct nfsd4_session *session = NULL;
3607 struct nfsd4_slot *slot = resp->cstate.slot;
58e7b33a 3608 u32 length, tlen = 0;
496c262c
AA		 3609
3610 if (!nfsd4_has_session(&resp->cstate))
58e7b33a 3611 return 0;
496c262c
AA		 3612
3613 session = resp->cstate.session;
58e7b33a
MJ		 3614 if (session == NULL)
3615 return 0;
496c262c
AA		 3616
3617 if (xb->page_len == 0) {
3618 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad;
3619 } else {
3620 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
3621 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base;
3622
3623 length = xb->head[0].iov_len + xb->page_len + tlen + pad;
3624 }
3625 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
3626 length, xb->page_len, tlen, pad);
3627
58e7b33a
MJ		 3628 if (length > session->se_fchannel.maxresp_sz)
3629 return nfserr_rep_too_big;
3630
73e79482 3631 if ((slot->sl_flags & NFSD4_SLOT_CACHETHIS) &&
58e7b33a 3632 length > session->se_fchannel.maxresp_cached)
496c262c 3633 return nfserr_rep_too_big_to_cache;
58e7b33a
MJ		 3634
3635 return 0;
496c262c
AA		 3636}
3637
1da177e4
LT		 3638void
3639nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3640{
9411b1d4 3641 struct nfs4_stateowner *so = resp->cstate.replay_owner;
2ebbc012 3642 __be32 *statp;
bc749ca4 3643 __be32 *p;
1da177e4
LT		 3644
3645 RESERVE_SPACE(8);
3646 WRITE32(op->opnum);
3647 statp = p++; /* to be backfilled at the end */
3648 ADJUST_ARGS();
3649
695e12f8
BH		 3650 if (op->opnum == OP_ILLEGAL)
3651 goto status;
3652 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3653 !nfsd4_enc_ops[op->opnum]);
3654 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
496c262c 3655 /* nfsd4_check_drc_limit guarantees enough room for error status */
58e7b33a
MJ		 3656 if (!op->status)
3657 op->status = nfsd4_check_resp_size(resp, 0);
9411b1d4
BF		 3658 if (so) {
3659 so->so_replay.rp_status = op->status;
3660 so->so_replay.rp_buflen = (char *)resp->p - (char *)(statp+1);
3661 memcpy(so->so_replay.rp_buf, statp+1, so->so_replay.rp_buflen);
3662 }
695e12f8 3663status:
1da177e4
LT		 3664 /*
3665 * Note: We write the status directly, instead of using WRITE32(),
3666 * since it is already in network byte order.
3667 */
3668 *statp = op->status;
3669}
3670
3671/*
3672 * Encode the reply stored in the stateowner reply cache
3673 *
3674 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3675 * previously sent already encoded operation.
3676 *
3677 * called with nfs4_lock_state() held
3678 */
3679void
3680nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3681{
bc749ca4 3682 __be32 *p;
1da177e4
LT		 3683 struct nfs4_replay *rp = op->replay;
3684
3685 BUG_ON(!rp);
3686
3687 RESERVE_SPACE(8);
3688 WRITE32(op->opnum);
3689 *p++ = rp->rp_status; /* already xdr'ed */
3690 ADJUST_ARGS();
3691
3692 RESERVE_SPACE(rp->rp_buflen);
3693 WRITEMEM(rp->rp_buf, rp->rp_buflen);
3694 ADJUST_ARGS();
3695}
3696
1da177e4 3697int
2ebbc012 3698nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
1da177e4
LT		 3699{
3700 return xdr_ressize_check(rqstp, p);
3701}
3702
3e98abff 3703int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
1da177e4 3704{
3e98abff
BF		 3705 struct svc_rqst *rqstp = rq;
3706 struct nfsd4_compoundargs *args = rqstp->rq_argp;
3707
1da177e4
LT		 3708 if (args->ops != args->iops) {
3709 kfree(args->ops);
3710 args->ops = args->iops;
3711 }
f99d49ad
JJ		 3712 kfree(args->tmpp);
3713 args->tmpp = NULL;
1da177e4
LT		 3714 while (args->to_free) {
3715 struct tmpbuf *tb = args->to_free;
3716 args->to_free = tb->next;
3717 tb->release(tb->buf);
3718 kfree(tb);
3719 }
3e98abff 3720 return 1;
1da177e4
LT		 3721}
3722
3723int
2ebbc012 3724nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
1da177e4 3725{
1da177e4
LT		 3726 args->p = p;
3727 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3728 args->pagelist = rqstp->rq_arg.pages;
3729 args->pagelen = rqstp->rq_arg.page_len;
3730 args->tmpp = NULL;
3731 args->to_free = NULL;
3732 args->ops = args->iops;
3733 args->rqstp = rqstp;
3734
3e98abff 3735 return !nfsd4_decode_compound(args);
1da177e4
LT		 3736}
3737
3738int
2ebbc012 3739nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
1da177e4
LT		 3740{
3741 /*
3742 * All that remains is to write the tag and operation count...
3743 */
557ce264 3744 struct nfsd4_compound_state *cs = &resp->cstate;
1da177e4
LT		 3745 struct kvec *iov;
3746 p = resp->tagp;
3747 *p++ = htonl(resp->taglen);
3748 memcpy(p, resp->tag, resp->taglen);
3749 p += XDR_QUADLEN(resp->taglen);
3750 *p++ = htonl(resp->opcnt);
3751
3752 if (rqstp->rq_res.page_len)
3753 iov = &rqstp->rq_res.tail[0];
3754 else
3755 iov = &rqstp->rq_res.head[0];
3756 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3757 BUG_ON(iov->iov_len > PAGE_SIZE);
26c0c75e
BF		 3758 if (nfsd4_has_session(cs)) {
3759 if (cs->status != nfserr_replay_cache) {
3760 nfsd4_store_cache_entry(resp);
73e79482 3761 cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE;
26c0c75e 3762 }
d7682988 3763 /* Renew the clientid on success and on replay */
221a6876
BF		 3764 put_client_renew(cs->session->se_client);
3765 nfsd4_put_session(cs->session);
da3846a2 3766 }
1da177e4
LT		 3767 return 1;
3768}
3769
3770/*
3771 * Local variables:
3772 * c-basic-offset: 8
3773 * End:
3774 */
Linux kernel - Deliverables
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