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