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Merge tag 'renesas-fixes-for-v3.13' of git://git.kernel.org/pub/scm/linux/kernel...
[deliverable/linux.git] / fs / nfsd / nfs4xdr.c
CommitLineData
1da177e4 1/*
1da177e4
LT		 2 * Server-side XDR for NFSv4
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 *
35 * TODO: Neil Brown made the following observation: We currently
36 * initially reserve NFSD_BUFSIZE space on the transmit queue and
37 * never release any of that until the request is complete.
38 * It would be good to calculate a new maximum response size while
39 * decoding the COMPOUND, and call svc_reserve with this number
40 * at the end of nfs4svc_decode_compoundargs.
41 */
42
5a0e3ad6 43#include <linux/slab.h>
1da177e4 44#include <linux/namei.h>
341eb184 45#include <linux/statfs.h>
0733d213 46#include <linux/utsname.h>
17456804 47#include <linux/pagemap.h>
4796f457 48#include <linux/sunrpc/svcauth_gss.h>
9a74af21 49
2ca72e17
BF		 50#include "idmap.h"
51#include "acl.h"
9a74af21 52#include "xdr4.h"
0a3adade 53#include "vfs.h"
17456804 54#include "state.h"
1091006c 55#include "cache.h"
3d733711 56#include "netns.h"
2ca72e17 57
18032ca0
DQ		 58#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
59#include <linux/security.h>
60#endif
61
62
1da177e4
LT		 63#define NFSDDBG_FACILITY NFSDDBG_XDR
64
42ca0993
BF		 65/*
66 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
67 * directory in order to indicate to the client that a filesystem boundary is present
68 * We use a fixed fsid for a referral
69 */
70#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
71#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
72
b37ad28b 73static __be32
a36b1725 74check_filename(char *str, int len)
1da177e4
LT		 75{
76 int i;
77
78 if (len == 0)
79 return nfserr_inval;
80 if (isdotent(str, len))
a36b1725 81 return nfserr_badname;
1da177e4
LT		 82 for (i = 0; i < len; i++)
83 if (str[i] == '/')
a36b1725 84 return nfserr_badname;
1da177e4
LT		 85 return 0;
86}
87
1da177e4 88#define DECODE_HEAD \
2ebbc012 89 __be32 *p; \
b37ad28b 90 __be32 status
1da177e4
LT		 91#define DECODE_TAIL \
92 status = 0; \
93out: \
94 return status; \
95xdr_error: \
817cb9d4
CL		 96 dprintk("NFSD: xdr error (%s:%d)\n", \
97 __FILE__, __LINE__); \
1da177e4
LT		 98 status = nfserr_bad_xdr; \
99 goto out
100
101#define READ32(x) (x) = ntohl(*p++)
102#define READ64(x) do { \
103 (x) = (u64)ntohl(*p++) << 32; \
104 (x) |= ntohl(*p++); \
105} while (0)
106#define READTIME(x) do { \
107 p++; \
108 (x) = ntohl(*p++); \
109 p++; \
110} while (0)
111#define READMEM(x,nbytes) do { \
112 x = (char *)p; \
113 p += XDR_QUADLEN(nbytes); \
114} while (0)
115#define SAVEMEM(x,nbytes) do { \
116 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
117 savemem(argp, p, nbytes) : \
118 (char *)p)) { \
817cb9d4
CL		 119 dprintk("NFSD: xdr error (%s:%d)\n", \
120 __FILE__, __LINE__); \
1da177e4
LT		 121 goto xdr_error; \
122 } \
123 p += XDR_QUADLEN(nbytes); \
124} while (0)
125#define COPYMEM(x,nbytes) do { \
126 memcpy((x), p, nbytes); \
127 p += XDR_QUADLEN(nbytes); \
128} while (0)
129
130/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
131#define READ_BUF(nbytes) do { \
132 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
133 p = argp->p; \
134 argp->p += XDR_QUADLEN(nbytes); \
135 } else if (!(p = read_buf(argp, nbytes))) { \
817cb9d4
CL		 136 dprintk("NFSD: xdr error (%s:%d)\n", \
137 __FILE__, __LINE__); \
1da177e4
LT		 138 goto xdr_error; \
139 } \
140} while (0)
141
590b7431
BF		 142static void next_decode_page(struct nfsd4_compoundargs *argp)
143{
590b7431 144 argp->p = page_address(argp->pagelist[0]);
365da4ad 145 argp->pagelist++;
590b7431
BF		 146 if (argp->pagelen < PAGE_SIZE) {
147 argp->end = argp->p + (argp->pagelen>>2);
148 argp->pagelen = 0;
149 } else {
150 argp->end = argp->p + (PAGE_SIZE>>2);
151 argp->pagelen -= PAGE_SIZE;
152 }
153}
154
ca2a05aa 155static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
1da177e4
LT		 156{
157 /* We want more bytes than seem to be available.
158 * Maybe we need a new page, maybe we have just run out
159 */
ca2a05aa 160 unsigned int avail = (char *)argp->end - (char *)argp->p;
2ebbc012 161 __be32 *p;
1da177e4
LT		 162 if (avail + argp->pagelen < nbytes)
163 return NULL;
164 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
165 return NULL;
166 /* ok, we can do it with the current plus the next page */
167 if (nbytes <= sizeof(argp->tmp))
168 p = argp->tmp;
169 else {
f99d49ad 170 kfree(argp->tmpp);
1da177e4
LT		 171 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
172 if (!p)
173 return NULL;
174
175 }
ca2a05aa
BF		 176 /*
177 * The following memcpy is safe because read_buf is always
178 * called with nbytes > avail, and the two cases above both
179 * guarantee p points to at least nbytes bytes.
180 */
1da177e4 181 memcpy(p, argp->p, avail);
590b7431 182 next_decode_page(argp);
1da177e4
LT		 183 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
184 argp->p += XDR_QUADLEN(nbytes - avail);
185 return p;
186}
187
60adfc50
AA		 188static int zero_clientid(clientid_t *clid)
189{
190 return (clid->cl_boot == 0) && (clid->cl_id == 0);
191}
192
1da177e4
LT		 193static int
194defer_free(struct nfsd4_compoundargs *argp,
195 void (*release)(const void *), void *p)
196{
197 struct tmpbuf *tb;
198
199 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
200 if (!tb)
201 return -ENOMEM;
202 tb->buf = p;
203 tb->release = release;
204 tb->next = argp->to_free;
205 argp->to_free = tb;
206 return 0;
207}
208
2ebbc012 209static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
1da177e4 210{
1da177e4 211 if (p == argp->tmp) {
67114fe6 212 p = kmemdup(argp->tmp, nbytes, GFP_KERNEL);
a4db5fe5
BF		 213 if (!p)
214 return NULL;
1da177e4 215 } else {
73dff8be 216 BUG_ON(p != argp->tmpp);
1da177e4
LT		 217 argp->tmpp = NULL;
218 }
219 if (defer_free(argp, kfree, p)) {
a4db5fe5 220 kfree(p);
1da177e4
LT		 221 return NULL;
222 } else
223 return (char *)p;
224}
225
b37ad28b 226static __be32
1da177e4
LT		 227nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
228{
229 u32 bmlen;
230 DECODE_HEAD;
231
232 bmval[0] = 0;
233 bmval[1] = 0;
7e705706 234 bmval[2] = 0;
1da177e4
LT		 235
236 READ_BUF(4);
237 READ32(bmlen);
238 if (bmlen > 1000)
239 goto xdr_error;
240
241 READ_BUF(bmlen << 2);
242 if (bmlen > 0)
243 READ32(bmval[0]);
244 if (bmlen > 1)
245 READ32(bmval[1]);
7e705706
AA		 246 if (bmlen > 2)
247 READ32(bmval[2]);
1da177e4
LT		 248
249 DECODE_TAIL;
250}
251
b37ad28b 252static __be32
3c8e0316 253nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
18032ca0
DQ		 254 struct iattr *iattr, struct nfs4_acl **acl,
255 struct xdr_netobj *label)
1da177e4
LT		 256{
257 int expected_len, len = 0;
258 u32 dummy32;
259 char *buf;
b8dd7b9a 260 int host_err;
1da177e4
LT		 261
262 DECODE_HEAD;
263 iattr->ia_valid = 0;
264 if ((status = nfsd4_decode_bitmap(argp, bmval)))
265 return status;
266
1da177e4
LT		 267 READ_BUF(4);
268 READ32(expected_len);
269
270 if (bmval[0] & FATTR4_WORD0_SIZE) {
271 READ_BUF(8);
272 len += 8;
273 READ64(iattr->ia_size);
274 iattr->ia_valid |= ATTR_SIZE;
275 }
276 if (bmval[0] & FATTR4_WORD0_ACL) {
64a817cf 277 u32 nace;
28e05dd8 278 struct nfs4_ace *ace;
1da177e4
LT		 279
280 READ_BUF(4); len += 4;
281 READ32(nace);
282
28e05dd8
BF		 283 if (nace > NFS4_ACL_MAX)
284 return nfserr_resource;
285
286 *acl = nfs4_acl_new(nace);
1da177e4 287 if (*acl == NULL) {
b8dd7b9a 288 host_err = -ENOMEM;
1da177e4
LT		 289 goto out_nfserr;
290 }
28e05dd8 291 defer_free(argp, kfree, *acl);
1da177e4 292
28e05dd8
BF		 293 (*acl)->naces = nace;
294 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
1da177e4 295 READ_BUF(16); len += 16;
28e05dd8
BF		 296 READ32(ace->type);
297 READ32(ace->flag);
298 READ32(ace->access_mask);
1da177e4
LT		 299 READ32(dummy32);
300 READ_BUF(dummy32);
301 len += XDR_QUADLEN(dummy32) << 2;
302 READMEM(buf, dummy32);
28e05dd8 303 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
3c726023 304 status = nfs_ok;
28e05dd8 305 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ab8e4aee 306 ;
28e05dd8 307 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
3c726023 308 status = nfsd_map_name_to_gid(argp->rqstp,
ab8e4aee 309 buf, dummy32, &ace->who_gid);
1da177e4 310 else
3c726023 311 status = nfsd_map_name_to_uid(argp->rqstp,
ab8e4aee 312 buf, dummy32, &ace->who_uid);
3c726023
BF		 313 if (status)
314 return status;
1da177e4
LT		 315 }
316 } else
317 *acl = NULL;
318 if (bmval[1] & FATTR4_WORD1_MODE) {
319 READ_BUF(4);
320 len += 4;
321 READ32(iattr->ia_mode);
322 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
323 iattr->ia_valid |= ATTR_MODE;
324 }
325 if (bmval[1] & FATTR4_WORD1_OWNER) {
326 READ_BUF(4);
327 len += 4;
328 READ32(dummy32);
329 READ_BUF(dummy32);
330 len += (XDR_QUADLEN(dummy32) << 2);
331 READMEM(buf, dummy32);
47c85291
N		 332 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
333 return status;
1da177e4
LT		 334 iattr->ia_valid |= ATTR_UID;
335 }
336 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
337 READ_BUF(4);
338 len += 4;
339 READ32(dummy32);
340 READ_BUF(dummy32);
341 len += (XDR_QUADLEN(dummy32) << 2);
342 READMEM(buf, dummy32);
47c85291
N		 343 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
344 return status;
1da177e4
LT		 345 iattr->ia_valid |= ATTR_GID;
346 }
347 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
348 READ_BUF(4);
349 len += 4;
350 READ32(dummy32);
351 switch (dummy32) {
352 case NFS4_SET_TO_CLIENT_TIME:
353 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
354 all 32 bits of 'nseconds'. */
355 READ_BUF(12);
356 len += 12;
bf8d9097 357 READ64(iattr->ia_atime.tv_sec);
1da177e4
LT		 358 READ32(iattr->ia_atime.tv_nsec);
359 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
360 return nfserr_inval;
361 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
362 break;
363 case NFS4_SET_TO_SERVER_TIME:
364 iattr->ia_valid |= ATTR_ATIME;
365 break;
366 default:
367 goto xdr_error;
368 }
369 }
1da177e4
LT		 370 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
371 READ_BUF(4);
372 len += 4;
373 READ32(dummy32);
374 switch (dummy32) {
375 case NFS4_SET_TO_CLIENT_TIME:
376 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
377 all 32 bits of 'nseconds'. */
378 READ_BUF(12);
379 len += 12;
bf8d9097 380 READ64(iattr->ia_mtime.tv_sec);
1da177e4
LT		 381 READ32(iattr->ia_mtime.tv_nsec);
382 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
383 return nfserr_inval;
384 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
385 break;
386 case NFS4_SET_TO_SERVER_TIME:
387 iattr->ia_valid |= ATTR_MTIME;
388 break;
389 default:
390 goto xdr_error;
391 }
392 }
18032ca0
DQ		 393
394 label->len = 0;
395#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
396 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
397 READ_BUF(4);
398 len += 4;
399 READ32(dummy32); /* lfs: we don't use it */
400 READ_BUF(4);
401 len += 4;
402 READ32(dummy32); /* pi: we don't use it either */
403 READ_BUF(4);
404 len += 4;
405 READ32(dummy32);
406 READ_BUF(dummy32);
407 if (dummy32 > NFSD4_MAX_SEC_LABEL_LEN)
408 return nfserr_badlabel;
409 len += (XDR_QUADLEN(dummy32) << 2);
410 READMEM(buf, dummy32);
411 label->data = kzalloc(dummy32 + 1, GFP_KERNEL);
412 if (!label->data)
413 return nfserr_jukebox;
3378b7f4 414 label->len = dummy32;
18032ca0
DQ		 415 defer_free(argp, kfree, label->data);
416 memcpy(label->data, buf, dummy32);
417 }
418#endif
419
3c8e0316
YZ		 420 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
421 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
422 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
423 READ_BUF(expected_len - len);
424 else if (len != expected_len)
1da177e4
LT		 425 goto xdr_error;
426
427 DECODE_TAIL;
428
429out_nfserr:
b8dd7b9a 430 status = nfserrno(host_err);
1da177e4
LT		 431 goto out;
432}
433
e31a1b66
BH		 434static __be32
435nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
436{
437 DECODE_HEAD;
438
439 READ_BUF(sizeof(stateid_t));
440 READ32(sid->si_generation);
441 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
442
443 DECODE_TAIL;
444}
445
b37ad28b 446static __be32
1da177e4
LT		 447nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
448{
449 DECODE_HEAD;
450
451 READ_BUF(4);
452 READ32(access->ac_req_access);
453
454 DECODE_TAIL;
455}
456
acb2887e
BF		 457static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
458{
459 DECODE_HEAD;
12fc3e92 460 u32 dummy, uid, gid;
acb2887e
BF		 461 char *machine_name;
462 int i;
463 int nr_secflavs;
464
465 /* callback_sec_params4 */
466 READ_BUF(4);
467 READ32(nr_secflavs);
57569a70
BF		 468 if (nr_secflavs)
469 cbs->flavor = (u32)(-1);
470 else
471 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
472 cbs->flavor = 0;
acb2887e
BF		 473 for (i = 0; i < nr_secflavs; ++i) {
474 READ_BUF(4);
475 READ32(dummy);
476 switch (dummy) {
477 case RPC_AUTH_NULL:
478 /* Nothing to read */
12fc3e92
BF		 479 if (cbs->flavor == (u32)(-1))
480 cbs->flavor = RPC_AUTH_NULL;
acb2887e
BF		 481 break;
482 case RPC_AUTH_UNIX:
483 READ_BUF(8);
484 /* stamp */
485 READ32(dummy);
486
487 /* machine name */
488 READ32(dummy);
489 READ_BUF(dummy);
490 SAVEMEM(machine_name, dummy);
491
492 /* uid, gid */
493 READ_BUF(8);
12fc3e92
BF		 494 READ32(uid);
495 READ32(gid);
acb2887e
BF		 496
497 /* more gids */
498 READ_BUF(4);
499 READ32(dummy);
500 READ_BUF(dummy * 4);
12fc3e92 501 if (cbs->flavor == (u32)(-1)) {
03bc6d1c
EB		 502 kuid_t kuid = make_kuid(&init_user_ns, uid);
503 kgid_t kgid = make_kgid(&init_user_ns, gid);
504 if (uid_valid(kuid) && gid_valid(kgid)) {
505 cbs->uid = kuid;
506 cbs->gid = kgid;
507 cbs->flavor = RPC_AUTH_UNIX;
508 } else {
509 dprintk("RPC_AUTH_UNIX with invalid"
510 "uid or gid ignoring!\n");
511 }
12fc3e92 512 }
acb2887e
BF		 513 break;
514 case RPC_AUTH_GSS:
515 dprintk("RPC_AUTH_GSS callback secflavor "
516 "not supported!\n");
517 READ_BUF(8);
518 /* gcbp_service */
519 READ32(dummy);
520 /* gcbp_handle_from_server */
521 READ32(dummy);
522 READ_BUF(dummy);
523 p += XDR_QUADLEN(dummy);
524 /* gcbp_handle_from_client */
525 READ_BUF(4);
526 READ32(dummy);
527 READ_BUF(dummy);
528 break;
529 default:
530 dprintk("Illegal callback secflavor\n");
531 return nfserr_inval;
532 }
533 }
534 DECODE_TAIL;
535}
536
cb73a9f4
BF		 537static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
538{
539 DECODE_HEAD;
540
541 READ_BUF(4);
542 READ32(bc->bc_cb_program);
543 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
544
545 DECODE_TAIL;
546}
547
1d1bc8f2
BF		 548static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
549{
550 DECODE_HEAD;
1d1bc8f2
BF		 551
552 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
553 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
554 READ32(bcts->dir);
6ce2357f
BS		 555 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
556 * could help us figure out we should be using it. */
1d1bc8f2
BF		 557 DECODE_TAIL;
558}
559
b37ad28b 560static __be32
1da177e4
LT		 561nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
562{
563 DECODE_HEAD;
564
e31a1b66 565 READ_BUF(4);
1da177e4 566 READ32(close->cl_seqid);
e31a1b66 567 return nfsd4_decode_stateid(argp, &close->cl_stateid);
1da177e4
LT		 568
569 DECODE_TAIL;
570}
571
572
b37ad28b 573static __be32
1da177e4
LT		 574nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
575{
576 DECODE_HEAD;
577
578 READ_BUF(12);
579 READ64(commit->co_offset);
580 READ32(commit->co_count);
581
582 DECODE_TAIL;
583}
584
b37ad28b 585static __be32
1da177e4
LT		 586nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
587{
588 DECODE_HEAD;
589
590 READ_BUF(4);
591 READ32(create->cr_type);
592 switch (create->cr_type) {
593 case NF4LNK:
594 READ_BUF(4);
595 READ32(create->cr_linklen);
596 READ_BUF(create->cr_linklen);
597 SAVEMEM(create->cr_linkname, create->cr_linklen);
598 break;
599 case NF4BLK:
600 case NF4CHR:
601 READ_BUF(8);
602 READ32(create->cr_specdata1);
603 READ32(create->cr_specdata2);
604 break;
605 case NF4SOCK:
606 case NF4FIFO:
607 case NF4DIR:
608 default:
609 break;
610 }
611
612 READ_BUF(4);
613 READ32(create->cr_namelen);
614 READ_BUF(create->cr_namelen);
615 SAVEMEM(create->cr_name, create->cr_namelen);
a36b1725 616 if ((status = check_filename(create->cr_name, create->cr_namelen)))
1da177e4
LT		 617 return status;
618
3c8e0316 619 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
18032ca0 620 &create->cr_acl, &create->cr_label);
c0d6fc8a 621 if (status)
1da177e4
LT		 622 goto out;
623
624 DECODE_TAIL;
625}
626
b37ad28b 627static inline __be32
1da177e4
LT		 628nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
629{
e31a1b66 630 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
1da177e4
LT		 631}
632
b37ad28b 633static inline __be32
1da177e4
LT		 634nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
635{
636 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
637}
638
b37ad28b 639static __be32
1da177e4
LT		 640nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
641{
642 DECODE_HEAD;
643
644 READ_BUF(4);
645 READ32(link->li_namelen);
646 READ_BUF(link->li_namelen);
647 SAVEMEM(link->li_name, link->li_namelen);
a36b1725 648 if ((status = check_filename(link->li_name, link->li_namelen)))
1da177e4
LT		 649 return status;
650
651 DECODE_TAIL;
652}
653
b37ad28b 654static __be32
1da177e4
LT		 655nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
656{
657 DECODE_HEAD;
658
1da177e4
LT		 659 /*
660 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
661 */
662 READ_BUF(28);
663 READ32(lock->lk_type);
664 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
665 goto xdr_error;
666 READ32(lock->lk_reclaim);
667 READ64(lock->lk_offset);
668 READ64(lock->lk_length);
669 READ32(lock->lk_is_new);
670
671 if (lock->lk_is_new) {
e31a1b66 672 READ_BUF(4);
1da177e4 673 READ32(lock->lk_new_open_seqid);
e31a1b66
BH		 674 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
675 if (status)
676 return status;
677 READ_BUF(8 + sizeof(clientid_t));
1da177e4
LT		 678 READ32(lock->lk_new_lock_seqid);
679 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
680 READ32(lock->lk_new_owner.len);
681 READ_BUF(lock->lk_new_owner.len);
682 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
683 } else {
e31a1b66
BH		 684 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
685 if (status)
686 return status;
687 READ_BUF(4);
1da177e4
LT		 688 READ32(lock->lk_old_lock_seqid);
689 }
690
691 DECODE_TAIL;
692}
693
b37ad28b 694static __be32
1da177e4
LT		 695nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
696{
697 DECODE_HEAD;
698
699 READ_BUF(32);
700 READ32(lockt->lt_type);
701 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
702 goto xdr_error;
703 READ64(lockt->lt_offset);
704 READ64(lockt->lt_length);
705 COPYMEM(&lockt->lt_clientid, 8);
706 READ32(lockt->lt_owner.len);
707 READ_BUF(lockt->lt_owner.len);
708 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
709
710 DECODE_TAIL;
711}
712
b37ad28b 713static __be32
1da177e4
LT		 714nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
715{
716 DECODE_HEAD;
717
e31a1b66 718 READ_BUF(8);
1da177e4
LT		 719 READ32(locku->lu_type);
720 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
721 goto xdr_error;
722 READ32(locku->lu_seqid);
e31a1b66
BH		 723 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
724 if (status)
725 return status;
726 READ_BUF(16);
1da177e4
LT		 727 READ64(locku->lu_offset);
728 READ64(locku->lu_length);
729
730 DECODE_TAIL;
731}
732
b37ad28b 733static __be32
1da177e4
LT		 734nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
735{
736 DECODE_HEAD;
737
738 READ_BUF(4);
739 READ32(lookup->lo_len);
740 READ_BUF(lookup->lo_len);
741 SAVEMEM(lookup->lo_name, lookup->lo_len);
a36b1725 742 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
1da177e4
LT		 743 return status;
744
745 DECODE_TAIL;
746}
747
2c8bd7e0 748static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
04f9e664
BF		 749{
750 __be32 *p;
751 u32 w;
752
753 READ_BUF(4);
754 READ32(w);
2c8bd7e0
BH		 755 *share_access = w & NFS4_SHARE_ACCESS_MASK;
756 *deleg_want = w & NFS4_SHARE_WANT_MASK;
757 if (deleg_when)
758 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
759
04f9e664
BF		 760 switch (w & NFS4_SHARE_ACCESS_MASK) {
761 case NFS4_SHARE_ACCESS_READ:
762 case NFS4_SHARE_ACCESS_WRITE:
763 case NFS4_SHARE_ACCESS_BOTH:
764 break;
765 default:
766 return nfserr_bad_xdr;
767 }
fc0d14fe 768 w &= ~NFS4_SHARE_ACCESS_MASK;
04f9e664
BF		 769 if (!w)
770 return nfs_ok;
771 if (!argp->minorversion)
772 return nfserr_bad_xdr;
773 switch (w & NFS4_SHARE_WANT_MASK) {
774 case NFS4_SHARE_WANT_NO_PREFERENCE:
775 case NFS4_SHARE_WANT_READ_DELEG:
776 case NFS4_SHARE_WANT_WRITE_DELEG:
777 case NFS4_SHARE_WANT_ANY_DELEG:
778 case NFS4_SHARE_WANT_NO_DELEG:
779 case NFS4_SHARE_WANT_CANCEL:
780 break;
781 default:
782 return nfserr_bad_xdr;
783 }
92bac8c5 784 w &= ~NFS4_SHARE_WANT_MASK;
04f9e664
BF		 785 if (!w)
786 return nfs_ok;
2c8bd7e0
BH		 787
788 if (!deleg_when) /* open_downgrade */
789 return nfserr_inval;
04f9e664
BF		 790 switch (w) {
791 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
792 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
c668fc6d
BH		 793 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
794 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
04f9e664
BF		 795 return nfs_ok;
796 }
797xdr_error:
798 return nfserr_bad_xdr;
799}
800
801static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
802{
803 __be32 *p;
804
805 READ_BUF(4);
806 READ32(*x);
807 /* Note: unlinke access bits, deny bits may be zero. */
01cd4afa 808 if (*x & ~NFS4_SHARE_DENY_BOTH)
04f9e664
BF		 809 return nfserr_bad_xdr;
810 return nfs_ok;
811xdr_error:
812 return nfserr_bad_xdr;
813}
814
a084daf5
BF		 815static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
816{
817 __be32 *p;
818
819 READ_BUF(4);
820 READ32(o->len);
821
822 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
823 return nfserr_bad_xdr;
824
825 READ_BUF(o->len);
826 SAVEMEM(o->data, o->len);
827 return nfs_ok;
828xdr_error:
829 return nfserr_bad_xdr;
830}
831
b37ad28b 832static __be32
1da177e4
LT		 833nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
834{
835 DECODE_HEAD;
2c8bd7e0 836 u32 dummy;
1da177e4
LT		 837
838 memset(open->op_bmval, 0, sizeof(open->op_bmval));
839 open->op_iattr.ia_valid = 0;
fe0750e5 840 open->op_openowner = NULL;
1da177e4 841
9d313b17 842 open->op_xdr_error = 0;
1da177e4 843 /* seqid, share_access, share_deny, clientid, ownerlen */
04f9e664 844 READ_BUF(4);
1da177e4 845 READ32(open->op_seqid);
2c8bd7e0
BH		 846 /* decode, yet ignore deleg_when until supported */
847 status = nfsd4_decode_share_access(argp, &open->op_share_access,
848 &open->op_deleg_want, &dummy);
04f9e664
BF		 849 if (status)
850 goto xdr_error;
851 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
852 if (status)
853 goto xdr_error;
a084daf5 854 READ_BUF(sizeof(clientid_t));
1da177e4 855 COPYMEM(&open->op_clientid, sizeof(clientid_t));
a084daf5
BF		 856 status = nfsd4_decode_opaque(argp, &open->op_owner);
857 if (status)
858 goto xdr_error;
859 READ_BUF(4);
1da177e4
LT		 860 READ32(open->op_create);
861 switch (open->op_create) {
862 case NFS4_OPEN_NOCREATE:
863 break;
864 case NFS4_OPEN_CREATE:
865 READ_BUF(4);
866 READ32(open->op_createmode);
867 switch (open->op_createmode) {
868 case NFS4_CREATE_UNCHECKED:
869 case NFS4_CREATE_GUARDED:
c0d6fc8a 870 status = nfsd4_decode_fattr(argp, open->op_bmval,
18032ca0 871 &open->op_iattr, &open->op_acl, &open->op_label);
c0d6fc8a 872 if (status)
1da177e4
LT		 873 goto out;
874 break;
875 case NFS4_CREATE_EXCLUSIVE:
ab4684d1
CL		 876 READ_BUF(NFS4_VERIFIER_SIZE);
877 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 878 break;
79fb54ab
BH		 879 case NFS4_CREATE_EXCLUSIVE4_1:
880 if (argp->minorversion < 1)
881 goto xdr_error;
ab4684d1
CL		 882 READ_BUF(NFS4_VERIFIER_SIZE);
883 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
79fb54ab 884 status = nfsd4_decode_fattr(argp, open->op_bmval,
18032ca0 885 &open->op_iattr, &open->op_acl, &open->op_label);
79fb54ab
BH		 886 if (status)
887 goto out;
888 break;
1da177e4
LT		 889 default:
890 goto xdr_error;
891 }
892 break;
893 default:
894 goto xdr_error;
895 }
896
897 /* open_claim */
898 READ_BUF(4);
899 READ32(open->op_claim_type);
900 switch (open->op_claim_type) {
901 case NFS4_OPEN_CLAIM_NULL:
902 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
903 READ_BUF(4);
904 READ32(open->op_fname.len);
905 READ_BUF(open->op_fname.len);
906 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 907 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 908 return status;
909 break;
910 case NFS4_OPEN_CLAIM_PREVIOUS:
911 READ_BUF(4);
912 READ32(open->op_delegate_type);
913 break;
914 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
e31a1b66
BH		 915 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
916 if (status)
917 return status;
918 READ_BUF(4);
1da177e4
LT		 919 READ32(open->op_fname.len);
920 READ_BUF(open->op_fname.len);
921 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 922 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 923 return status;
924 break;
8b289b2c
BF		 925 case NFS4_OPEN_CLAIM_FH:
926 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
927 if (argp->minorversion < 1)
928 goto xdr_error;
929 /* void */
930 break;
931 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
932 if (argp->minorversion < 1)
933 goto xdr_error;
934 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
935 if (status)
936 return status;
937 break;
1da177e4
LT		 938 default:
939 goto xdr_error;
940 }
941
942 DECODE_TAIL;
943}
944
b37ad28b 945static __be32
1da177e4
LT		 946nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
947{
948 DECODE_HEAD;
e1a90ebd
AS		 949
950 if (argp->minorversion >= 1)
951 return nfserr_notsupp;
952
e31a1b66
BH		 953 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
954 if (status)
955 return status;
956 READ_BUF(4);
1da177e4 957 READ32(open_conf->oc_seqid);
e1a90ebd 958
1da177e4
LT		 959 DECODE_TAIL;
960}
961
b37ad28b 962static __be32
1da177e4
LT		 963nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
964{
965 DECODE_HEAD;
966
e31a1b66
BH		 967 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
968 if (status)
969 return status;
04f9e664 970 READ_BUF(4);
1da177e4 971 READ32(open_down->od_seqid);
2c8bd7e0
BH		 972 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
973 &open_down->od_deleg_want, NULL);
04f9e664
BF		 974 if (status)
975 return status;
976 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
977 if (status)
978 return status;
1da177e4
LT		 979 DECODE_TAIL;
980}
981
b37ad28b 982static __be32
1da177e4
LT		 983nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
984{
985 DECODE_HEAD;
986
987 READ_BUF(4);
988 READ32(putfh->pf_fhlen);
989 if (putfh->pf_fhlen > NFS4_FHSIZE)
990 goto xdr_error;
991 READ_BUF(putfh->pf_fhlen);
992 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
993
994 DECODE_TAIL;
995}
996
e1a90ebd
AS		 997static __be32
998nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
999{
1000 if (argp->minorversion == 0)
1001 return nfs_ok;
1002 return nfserr_notsupp;
1003}
1004
b37ad28b 1005static __be32
1da177e4
LT		 1006nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1007{
1008 DECODE_HEAD;
1009
e31a1b66
BH		 1010 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
1011 if (status)
1012 return status;
1013 READ_BUF(12);
1da177e4
LT		 1014 READ64(read->rd_offset);
1015 READ32(read->rd_length);
1016
1017 DECODE_TAIL;
1018}
1019
b37ad28b 1020static __be32
1da177e4
LT		 1021nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1022{
1023 DECODE_HEAD;
1024
1025 READ_BUF(24);
1026 READ64(readdir->rd_cookie);
1027 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
1028 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
1029 READ32(readdir->rd_maxcount);
1030 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
1031 goto out;
1032
1033 DECODE_TAIL;
1034}
1035
b37ad28b 1036static __be32
1da177e4
LT		 1037nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1038{
1039 DECODE_HEAD;
1040
1041 READ_BUF(4);
1042 READ32(remove->rm_namelen);
1043 READ_BUF(remove->rm_namelen);
1044 SAVEMEM(remove->rm_name, remove->rm_namelen);
a36b1725 1045 if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
1da177e4
LT		 1046 return status;
1047
1048 DECODE_TAIL;
1049}
1050
b37ad28b 1051static __be32
1da177e4
LT		 1052nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1053{
1054 DECODE_HEAD;
1055
1056 READ_BUF(4);
1057 READ32(rename->rn_snamelen);
1058 READ_BUF(rename->rn_snamelen + 4);
1059 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
1060 READ32(rename->rn_tnamelen);
1061 READ_BUF(rename->rn_tnamelen);
1062 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
a36b1725 1063 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
1da177e4 1064 return status;
a36b1725 1065 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
1da177e4
LT		 1066 return status;
1067
1068 DECODE_TAIL;
1069}
1070
b37ad28b 1071static __be32
1da177e4
LT		 1072nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1073{
1074 DECODE_HEAD;
1075
e1a90ebd
AS		 1076 if (argp->minorversion >= 1)
1077 return nfserr_notsupp;
1078
1da177e4
LT		 1079 READ_BUF(sizeof(clientid_t));
1080 COPYMEM(clientid, sizeof(clientid_t));
1081
1082 DECODE_TAIL;
1083}
1084
dcb488a3
AA		 1085static __be32
1086nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1087 struct nfsd4_secinfo *secinfo)
1088{
1089 DECODE_HEAD;
1090
1091 READ_BUF(4);
1092 READ32(secinfo->si_namelen);
1093 READ_BUF(secinfo->si_namelen);
1094 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
a36b1725 1095 status = check_filename(secinfo->si_name, secinfo->si_namelen);
dcb488a3
AA		 1096 if (status)
1097 return status;
1098 DECODE_TAIL;
1099}
1100
04f4ad16
BF		 1101static __be32
1102nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1103 struct nfsd4_secinfo_no_name *sin)
1104{
1105 DECODE_HEAD;
1106
1107 READ_BUF(4);
1108 READ32(sin->sin_style);
1109 DECODE_TAIL;
1110}
1111
b37ad28b 1112static __be32
1da177e4
LT		 1113nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1114{
e31a1b66 1115 __be32 status;
1da177e4 1116
e31a1b66
BH		 1117 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1118 if (status)
1119 return status;
3c8e0316 1120 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
18032ca0 1121 &setattr->sa_acl, &setattr->sa_label);
1da177e4
LT		 1122}
1123
b37ad28b 1124static __be32
1da177e4
LT		 1125nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1126{
1127 DECODE_HEAD;
1128
e1a90ebd
AS		 1129 if (argp->minorversion >= 1)
1130 return nfserr_notsupp;
1131
ab4684d1
CL		 1132 READ_BUF(NFS4_VERIFIER_SIZE);
1133 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 1134
a084daf5
BF		 1135 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1136 if (status)
1137 return nfserr_bad_xdr;
1138 READ_BUF(8);
1da177e4
LT		 1139 READ32(setclientid->se_callback_prog);
1140 READ32(setclientid->se_callback_netid_len);
1141
1142 READ_BUF(setclientid->se_callback_netid_len + 4);
1143 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
1144 READ32(setclientid->se_callback_addr_len);
1145
1146 READ_BUF(setclientid->se_callback_addr_len + 4);
1147 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
1148 READ32(setclientid->se_callback_ident);
1149
1150 DECODE_TAIL;
1151}
1152
b37ad28b 1153static __be32
1da177e4
LT		 1154nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1155{
1156 DECODE_HEAD;
1157
e1a90ebd
AS		 1158 if (argp->minorversion >= 1)
1159 return nfserr_notsupp;
1160
ab4684d1 1161 READ_BUF(8 + NFS4_VERIFIER_SIZE);
1da177e4 1162 COPYMEM(&scd_c->sc_clientid, 8);
ab4684d1 1163 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
1da177e4
LT		 1164
1165 DECODE_TAIL;
1166}
1167
1168/* Also used for NVERIFY */
b37ad28b 1169static __be32
1da177e4
LT		 1170nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1171{
1da177e4
LT		 1172 DECODE_HEAD;
1173
1174 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1175 goto out;
1176
1177 /* For convenience's sake, we compare raw xdr'd attributes in
e5f95703
BF		 1178 * nfsd4_proc_verify */
1179
1da177e4
LT		 1180 READ_BUF(4);
1181 READ32(verify->ve_attrlen);
1182 READ_BUF(verify->ve_attrlen);
1183 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1184
1185 DECODE_TAIL;
1186}
1187
b37ad28b 1188static __be32
1da177e4
LT		 1189nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1190{
1191 int avail;
1da177e4
LT		 1192 int len;
1193 DECODE_HEAD;
1194
e31a1b66
BH		 1195 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1196 if (status)
1197 return status;
1198 READ_BUF(16);
1da177e4
LT		 1199 READ64(write->wr_offset);
1200 READ32(write->wr_stable_how);
1201 if (write->wr_stable_how > 2)
1202 goto xdr_error;
1203 READ32(write->wr_buflen);
1204
1205 /* Sorry .. no magic macros for this.. *
1206 * READ_BUF(write->wr_buflen);
1207 * SAVEMEM(write->wr_buf, write->wr_buflen);
1208 */
1209 avail = (char*)argp->end - (char*)argp->p;
1210 if (avail + argp->pagelen < write->wr_buflen) {
817cb9d4
CL		 1211 dprintk("NFSD: xdr error (%s:%d)\n",
1212 __FILE__, __LINE__);
1da177e4
LT		 1213 goto xdr_error;
1214 }
70cc7f75
BF		 1215 write->wr_head.iov_base = p;
1216 write->wr_head.iov_len = avail;
5a80a54d 1217 WARN_ON(avail != (XDR_QUADLEN(avail) << 2));
70cc7f75 1218 write->wr_pagelist = argp->pagelist;
5a80a54d
BF		 1219
1220 len = XDR_QUADLEN(write->wr_buflen) << 2;
1221 if (len >= avail) {
1222 int pages;
1223
1224 len -= avail;
1225
1226 pages = len >> PAGE_SHIFT;
1227 argp->pagelist += pages;
1228 argp->pagelen -= pages * PAGE_SIZE;
1229 len -= pages * PAGE_SIZE;
1230
1231 argp->p = (__be32 *)page_address(argp->pagelist[0]);
365da4ad 1232 argp->pagelist++;
5a80a54d 1233 argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE);
1da177e4 1234 }
5a80a54d 1235 argp->p += XDR_QUADLEN(len);
1da177e4
LT		 1236
1237 DECODE_TAIL;
1238}
1239
b37ad28b 1240static __be32
1da177e4
LT		 1241nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1242{
1243 DECODE_HEAD;
1244
e1a90ebd
AS		 1245 if (argp->minorversion >= 1)
1246 return nfserr_notsupp;
1247
1da177e4
LT		 1248 READ_BUF(12);
1249 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1250 READ32(rlockowner->rl_owner.len);
1251 READ_BUF(rlockowner->rl_owner.len);
1252 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1253
60adfc50
AA		 1254 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1255 return nfserr_inval;
1da177e4
LT		 1256 DECODE_TAIL;
1257}
1258
2db134eb
AA		 1259static __be32
1260nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
0733d213 1261 struct nfsd4_exchange_id *exid)
2db134eb 1262{
5afa040b 1263 int dummy, tmp;
0733d213
AA		 1264 DECODE_HEAD;
1265
1266 READ_BUF(NFS4_VERIFIER_SIZE);
1267 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1268
a084daf5
BF		 1269 status = nfsd4_decode_opaque(argp, &exid->clname);
1270 if (status)
1271 return nfserr_bad_xdr;
0733d213
AA		 1272
1273 READ_BUF(4);
1274 READ32(exid->flags);
1275
1276 /* Ignore state_protect4_a */
1277 READ_BUF(4);
1278 READ32(exid->spa_how);
1279 switch (exid->spa_how) {
1280 case SP4_NONE:
1281 break;
1282 case SP4_MACH_CRED:
1283 /* spo_must_enforce */
1284 READ_BUF(4);
1285 READ32(dummy);
1286 READ_BUF(dummy * 4);
1287 p += dummy;
1288
1289 /* spo_must_allow */
1290 READ_BUF(4);
1291 READ32(dummy);
1292 READ_BUF(dummy * 4);
1293 p += dummy;
1294 break;
1295 case SP4_SSV:
1296 /* ssp_ops */
1297 READ_BUF(4);
1298 READ32(dummy);
1299 READ_BUF(dummy * 4);
1300 p += dummy;
1301
1302 READ_BUF(4);
1303 READ32(dummy);
1304 READ_BUF(dummy * 4);
1305 p += dummy;
1306
1307 /* ssp_hash_algs<> */
1308 READ_BUF(4);
5afa040b
MJ		 1309 READ32(tmp);
1310 while (tmp--) {
1311 READ_BUF(4);
1312 READ32(dummy);
1313 READ_BUF(dummy);
1314 p += XDR_QUADLEN(dummy);
1315 }
0733d213
AA		 1316
1317 /* ssp_encr_algs<> */
1318 READ_BUF(4);
5afa040b
MJ		 1319 READ32(tmp);
1320 while (tmp--) {
1321 READ_BUF(4);
1322 READ32(dummy);
1323 READ_BUF(dummy);
1324 p += XDR_QUADLEN(dummy);
1325 }
0733d213
AA		 1326
1327 /* ssp_window and ssp_num_gss_handles */
1328 READ_BUF(8);
1329 READ32(dummy);
1330 READ32(dummy);
1331 break;
1332 default:
1333 goto xdr_error;
1334 }
1335
1336 /* Ignore Implementation ID */
1337 READ_BUF(4); /* nfs_impl_id4 array length */
1338 READ32(dummy);
1339
1340 if (dummy > 1)
1341 goto xdr_error;
1342
1343 if (dummy == 1) {
1344 /* nii_domain */
1345 READ_BUF(4);
1346 READ32(dummy);
1347 READ_BUF(dummy);
1348 p += XDR_QUADLEN(dummy);
1349
1350 /* nii_name */
1351 READ_BUF(4);
1352 READ32(dummy);
1353 READ_BUF(dummy);
1354 p += XDR_QUADLEN(dummy);
1355
1356 /* nii_date */
1357 READ_BUF(12);
1358 p += 3;
1359 }
1360 DECODE_TAIL;
2db134eb
AA		 1361}
1362
1363static __be32
1364nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1365 struct nfsd4_create_session *sess)
1366{
ec6b5d7b 1367 DECODE_HEAD;
ec6b5d7b 1368 u32 dummy;
ec6b5d7b
AA		 1369
1370 READ_BUF(16);
1371 COPYMEM(&sess->clientid, 8);
1372 READ32(sess->seqid);
1373 READ32(sess->flags);
1374
1375 /* Fore channel attrs */
1376 READ_BUF(28);
1377 READ32(dummy); /* headerpadsz is always 0 */
1378 READ32(sess->fore_channel.maxreq_sz);
1379 READ32(sess->fore_channel.maxresp_sz);
1380 READ32(sess->fore_channel.maxresp_cached);
1381 READ32(sess->fore_channel.maxops);
1382 READ32(sess->fore_channel.maxreqs);
1383 READ32(sess->fore_channel.nr_rdma_attrs);
1384 if (sess->fore_channel.nr_rdma_attrs == 1) {
1385 READ_BUF(4);
1386 READ32(sess->fore_channel.rdma_attrs);
1387 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1388 dprintk("Too many fore channel attr bitmaps!\n");
1389 goto xdr_error;
1390 }
1391
1392 /* Back channel attrs */
1393 READ_BUF(28);
1394 READ32(dummy); /* headerpadsz is always 0 */
1395 READ32(sess->back_channel.maxreq_sz);
1396 READ32(sess->back_channel.maxresp_sz);
1397 READ32(sess->back_channel.maxresp_cached);
1398 READ32(sess->back_channel.maxops);
1399 READ32(sess->back_channel.maxreqs);
1400 READ32(sess->back_channel.nr_rdma_attrs);
1401 if (sess->back_channel.nr_rdma_attrs == 1) {
1402 READ_BUF(4);
1403 READ32(sess->back_channel.rdma_attrs);
1404 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1405 dprintk("Too many back channel attr bitmaps!\n");
1406 goto xdr_error;
1407 }
1408
acb2887e 1409 READ_BUF(4);
ec6b5d7b 1410 READ32(sess->callback_prog);
acb2887e 1411 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
ec6b5d7b 1412 DECODE_TAIL;
2db134eb
AA		 1413}
1414
1415static __be32
1416nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1417 struct nfsd4_destroy_session *destroy_session)
1418{
e10e0cfc
BH		 1419 DECODE_HEAD;
1420 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1421 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1422
1423 DECODE_TAIL;
2db134eb
AA		 1424}
1425
e1ca12df
BS		 1426static __be32
1427nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1428 struct nfsd4_free_stateid *free_stateid)
1429{
1430 DECODE_HEAD;
1431
1432 READ_BUF(sizeof(stateid_t));
1433 READ32(free_stateid->fr_stateid.si_generation);
1434 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1435
1436 DECODE_TAIL;
1437}
1438
2db134eb
AA		 1439static __be32
1440nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1441 struct nfsd4_sequence *seq)
1442{
b85d4c01
BH		 1443 DECODE_HEAD;
1444
1445 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1446 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1447 READ32(seq->seqid);
1448 READ32(seq->slotid);
1449 READ32(seq->maxslots);
1450 READ32(seq->cachethis);
1451
1452 DECODE_TAIL;
2db134eb
AA		 1453}
1454
17456804
BS		 1455static __be32
1456nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1457{
17456804 1458 int i;
03cfb420
BS		 1459 __be32 *p, status;
1460 struct nfsd4_test_stateid_id *stateid;
17456804
BS		 1461
1462 READ_BUF(4);
1463 test_stateid->ts_num_ids = ntohl(*p++);
1464
03cfb420 1465 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
17456804
BS		 1466
1467 for (i = 0; i < test_stateid->ts_num_ids; i++) {
03cfb420
BS		 1468 stateid = kmalloc(sizeof(struct nfsd4_test_stateid_id), GFP_KERNEL);
1469 if (!stateid) {
afcf6792 1470 status = nfserrno(-ENOMEM);
03cfb420
BS		 1471 goto out;
1472 }
1473
1474 defer_free(argp, kfree, stateid);
1475 INIT_LIST_HEAD(&stateid->ts_id_list);
1476 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1477
1478 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
17456804 1479 if (status)
03cfb420 1480 goto out;
17456804
BS		 1481 }
1482
1483 status = 0;
1484out:
1485 return status;
1486xdr_error:
1487 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1488 status = nfserr_bad_xdr;
1489 goto out;
1490}
1491
345c2842
MJ		 1492static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1493{
1494 DECODE_HEAD;
1495
1496 READ_BUF(8);
1497 COPYMEM(&dc->clientid, 8);
1498
1499 DECODE_TAIL;
1500}
1501
4dc6ec00
BF		 1502static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1503{
1504 DECODE_HEAD;
1505
1506 READ_BUF(4);
1507 READ32(rc->rca_one_fs);
1508
1509 DECODE_TAIL;
1510}
1511
347e0ad9
BH		 1512static __be32
1513nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1514{
1515 return nfs_ok;
1516}
1517
3c375c6f
BH		 1518static __be32
1519nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1520{
1e685ec2 1521 return nfserr_notsupp;
3c375c6f
BH		 1522}
1523
347e0ad9
BH		 1524typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1525
1526static nfsd4_dec nfsd4_dec_ops[] = {
ad1060c8
BF		 1527 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1528 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1529 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1530 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1531 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1532 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1533 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1534 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1535 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1536 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1537 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1538 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1539 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1540 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1541 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1542 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1543 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1544 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1545 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1546 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
e1a90ebd 1547 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
ad1060c8
BF		 1548 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1549 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1550 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1551 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1552 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1553 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1554 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1555 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1556 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1557 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1558 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1559 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1560 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1561 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1562 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1563 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
2db134eb
AA		 1564
1565 /* new operations for NFSv4.1 */
cb73a9f4 1566 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1d1bc8f2 1567 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
9064caae
RD		 1568 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1569 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1570 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
e1ca12df 1571 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
9064caae
RD		 1572 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1573 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1574 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1575 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1576 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1577 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
04f4ad16 1578 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
9064caae
RD		 1579 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1580 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
17456804 1581 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
9064caae 1582 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
345c2842 1583 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
4dc6ec00 1584 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
2db134eb
AA		 1585};
1586
e1a90ebd
AS		 1587static inline bool
1588nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
1589{
8217d146 1590 if (op->opnum < FIRST_NFS4_OP)
e1a90ebd 1591 return false;
8217d146 1592 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
e1a90ebd 1593 return false;
8217d146
AS		 1594 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
1595 return false;
1596 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
e1a90ebd
AS		 1597 return false;
1598 return true;
1599}
f2feb96b 1600
6ff40dec
BF		 1601/*
1602 * Return a rough estimate of the maximum possible reply size. Note the
1603 * estimate includes rpc headers so is meant to be passed to
1604 * svc_reserve, not svc_reserve_auth.
1605 *
1606 * Also note the current compound encoding permits only one operation to
1607 * use pages beyond the first one, so the maximum possible length is the
1608 * maximum over these values, not the sum.
1609 */
1610static int nfsd4_max_reply(u32 opnum)
1611{
1612 switch (opnum) {
1613 case OP_READLINK:
1614 case OP_READDIR:
1615 /*
1616 * Both of these ops take a single page for data and put
1617 * the head and tail in another page:
1618 */
1619 return 2 * PAGE_SIZE;
1620 case OP_READ:
1621 return INT_MAX;
1622 default:
1623 return PAGE_SIZE;
1624 }
1625}
1626
b37ad28b 1627static __be32
1da177e4
LT		 1628nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1629{
1630 DECODE_HEAD;
1631 struct nfsd4_op *op;
1091006c 1632 bool cachethis = false;
6ff40dec 1633 int max_reply = PAGE_SIZE;
1da177e4
LT		 1634 int i;
1635
1da177e4
LT		 1636 READ_BUF(4);
1637 READ32(argp->taglen);
1638 READ_BUF(argp->taglen + 8);
1639 SAVEMEM(argp->tag, argp->taglen);
1640 READ32(argp->minorversion);
1641 READ32(argp->opcnt);
1642
1643 if (argp->taglen > NFSD4_MAX_TAGLEN)
1644 goto xdr_error;
1645 if (argp->opcnt > 100)
1646 goto xdr_error;
1647
e8c96f8c 1648 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1da177e4
LT		 1649 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1650 if (!argp->ops) {
1651 argp->ops = argp->iops;
817cb9d4 1652 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1da177e4
LT		 1653 goto xdr_error;
1654 }
1655 }
1656
e1a90ebd 1657 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
30cff1ff
BH		 1658 argp->opcnt = 0;
1659
1da177e4
LT		 1660 for (i = 0; i < argp->opcnt; i++) {
1661 op = &argp->ops[i];
1662 op->replay = NULL;
1663
8a61b18c
BF		 1664 READ_BUF(4);
1665 READ32(op->opnum);
1da177e4 1666
e1a90ebd
AS		 1667 if (nfsd4_opnum_in_range(argp, op))
1668 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
347e0ad9 1669 else {
1da177e4
LT		 1670 op->opnum = OP_ILLEGAL;
1671 op->status = nfserr_op_illegal;
1da177e4
LT		 1672 }
1673
1674 if (op->status) {
1675 argp->opcnt = i+1;
1676 break;
1677 }
1091006c
BF		 1678 /*
1679 * We'll try to cache the result in the DRC if any one
1680 * op in the compound wants to be cached:
1681 */
1682 cachethis |= nfsd4_cache_this_op(op);
6ff40dec
BF		 1683
1684 max_reply = max(max_reply, nfsd4_max_reply(op->opnum));
1da177e4 1685 }
1091006c
BF		 1686 /* Sessions make the DRC unnecessary: */
1687 if (argp->minorversion)
1688 cachethis = false;
6ff40dec
BF		 1689 if (max_reply != INT_MAX)
1690 svc_reserve(argp->rqstp, max_reply);
1091006c 1691 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1da177e4
LT		 1692
1693 DECODE_TAIL;
1694}
1da177e4 1695
1da177e4
LT		 1696#define WRITE32(n) *p++ = htonl(n)
1697#define WRITE64(n) do { \
1698 *p++ = htonl((u32)((n) >> 32)); \
1699 *p++ = htonl((u32)(n)); \
1700} while (0)
5108b276 1701#define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1da177e4
LT		 1702 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1703 memcpy(p, ptr, nbytes); \
1704 p += XDR_QUADLEN(nbytes); \
5108b276 1705}} while (0)
c654b8a9
BF		 1706
1707static void write32(__be32 **p, u32 n)
1708{
45eaa1c1 1709 *(*p)++ = htonl(n);
c654b8a9
BF		 1710}
1711
1712static void write64(__be32 **p, u64 n)
1713{
45eaa1c1 1714 write32(p, (n >> 32));
c654b8a9
BF		 1715 write32(p, (u32)n);
1716}
1717
1718static void write_change(__be32 **p, struct kstat *stat, struct inode *inode)
1719{
1720 if (IS_I_VERSION(inode)) {
1721 write64(p, inode->i_version);
1722 } else {
1723 write32(p, stat->ctime.tv_sec);
1724 write32(p, stat->ctime.tv_nsec);
1725 }
1726}
1727
1728static void write_cinfo(__be32 **p, struct nfsd4_change_info *c)
1729{
1730 write32(p, c->atomic);
1731 if (c->change_supported) {
1732 write64(p, c->before_change);
1733 write64(p, c->after_change);
1734 } else {
1735 write32(p, c->before_ctime_sec);
1736 write32(p, c->before_ctime_nsec);
1737 write32(p, c->after_ctime_sec);
1738 write32(p, c->after_ctime_nsec);
1739 }
1740}
1da177e4
LT		 1741
1742#define RESERVE_SPACE(nbytes) do { \
1743 p = resp->p; \
1744 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1745} while (0)
1746#define ADJUST_ARGS() resp->p = p
1747
81c3f413 1748/* Encode as an array of strings the string given with components
e7a0444a 1749 * separated @sep, escaped with esc_enter and esc_exit.
81c3f413 1750 */
e7a0444a
WAA		 1751static __be32 nfsd4_encode_components_esc(char sep, char *components,
1752 __be32 **pp, int *buflen,
1753 char esc_enter, char esc_exit)
81c3f413 1754{
2ebbc012
AV		 1755 __be32 *p = *pp;
1756 __be32 *countp = p;
81c3f413 1757 int strlen, count=0;
e7a0444a 1758 char *str, *end, *next;
81c3f413
BF		 1759
1760 dprintk("nfsd4_encode_components(%s)\n", components);
1761 if ((*buflen -= 4) < 0)
1762 return nfserr_resource;
1763 WRITE32(0); /* We will fill this in with @count later */
1764 end = str = components;
1765 while (*end) {
e7a0444a
WAA		 1766 bool found_esc = false;
1767
1768 /* try to parse as esc_start, ..., esc_end, sep */
1769 if (*str == esc_enter) {
1770 for (; *end && (*end != esc_exit); end++)
1771 /* find esc_exit or end of string */;
1772 next = end + 1;
1773 if (*end && (!*next || *next == sep)) {
1774 str++;
1775 found_esc = true;
1776 }
1777 }
1778
1779 if (!found_esc)
1780 for (; *end && (*end != sep); end++)
1781 /* find sep or end of string */;
1782
81c3f413
BF		 1783 strlen = end - str;
1784 if (strlen) {
1785 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1786 return nfserr_resource;
1787 WRITE32(strlen);
1788 WRITEMEM(str, strlen);
1789 count++;
1790 }
1791 else
1792 end++;
1793 str = end;
1794 }
1795 *pp = p;
1796 p = countp;
1797 WRITE32(count);
1798 return 0;
1799}
1800
e7a0444a
WAA		 1801/* Encode as an array of strings the string given with components
1802 * separated @sep.
1803 */
1804static __be32 nfsd4_encode_components(char sep, char *components,
1805 __be32 **pp, int *buflen)
1806{
1807 return nfsd4_encode_components_esc(sep, components, pp, buflen, 0, 0);
1808}
1809
81c3f413
BF		 1810/*
1811 * encode a location element of a fs_locations structure
1812 */
b37ad28b 1813static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
2ebbc012 1814 __be32 **pp, int *buflen)
81c3f413 1815{
b37ad28b 1816 __be32 status;
2ebbc012 1817 __be32 *p = *pp;
81c3f413 1818
e7a0444a
WAA		 1819 status = nfsd4_encode_components_esc(':', location->hosts, &p, buflen,
1820 '[', ']');
81c3f413
BF		 1821 if (status)
1822 return status;
1823 status = nfsd4_encode_components('/', location->path, &p, buflen);
1824 if (status)
1825 return status;
1826 *pp = p;
1827 return 0;
1828}
1829
1830/*
ed748aac 1831 * Encode a path in RFC3530 'pathname4' format
81c3f413 1832 */
ed748aac
TM		 1833static __be32 nfsd4_encode_path(const struct path *root,
1834 const struct path *path, __be32 **pp, int *buflen)
81c3f413 1835{
301f0268 1836 struct path cur = *path;
ed748aac
TM		 1837 __be32 *p = *pp;
1838 struct dentry **components = NULL;
1839 unsigned int ncomponents = 0;
1840 __be32 err = nfserr_jukebox;
81c3f413 1841
ed748aac 1842 dprintk("nfsd4_encode_components(");
81c3f413 1843
ed748aac
TM		 1844 path_get(&cur);
1845 /* First walk the path up to the nfsd root, and store the
1846 * dentries/path components in an array.
1847 */
1848 for (;;) {
1849 if (cur.dentry == root->dentry && cur.mnt == root->mnt)
1850 break;
1851 if (cur.dentry == cur.mnt->mnt_root) {
1852 if (follow_up(&cur))
1853 continue;
1854 goto out_free;
1855 }
1856 if ((ncomponents & 15) == 0) {
1857 struct dentry **new;
1858 new = krealloc(components,
1859 sizeof(*new) * (ncomponents + 16),
1860 GFP_KERNEL);
1861 if (!new)
1862 goto out_free;
1863 components = new;
1864 }
1865 components[ncomponents++] = cur.dentry;
1866 cur.dentry = dget_parent(cur.dentry);
1867 }
81c3f413 1868
ed748aac
TM		 1869 *buflen -= 4;
1870 if (*buflen < 0)
1871 goto out_free;
1872 WRITE32(ncomponents);
1873
1874 while (ncomponents) {
1875 struct dentry *dentry = components[ncomponents - 1];
301f0268 1876 unsigned int len;
ed748aac 1877
301f0268
AV		 1878 spin_lock(&dentry->d_lock);
1879 len = dentry->d_name.len;
ed748aac 1880 *buflen -= 4 + (XDR_QUADLEN(len) << 2);
301f0268
AV		 1881 if (*buflen < 0) {
1882 spin_unlock(&dentry->d_lock);
ed748aac 1883 goto out_free;
301f0268 1884 }
ed748aac
TM		 1885 WRITE32(len);
1886 WRITEMEM(dentry->d_name.name, len);
1887 dprintk("/%s", dentry->d_name.name);
301f0268 1888 spin_unlock(&dentry->d_lock);
ed748aac
TM		 1889 dput(dentry);
1890 ncomponents--;
81c3f413 1891 }
ed748aac
TM		 1892
1893 *pp = p;
1894 err = 0;
1895out_free:
1896 dprintk(")\n");
1897 while (ncomponents)
1898 dput(components[--ncomponents]);
1899 kfree(components);
1900 path_put(&cur);
1901 return err;
1902}
1903
1904static __be32 nfsd4_encode_fsloc_fsroot(struct svc_rqst *rqstp,
1905 const struct path *path, __be32 **pp, int *buflen)
1906{
1907 struct svc_export *exp_ps;
1908 __be32 res;
1909
1910 exp_ps = rqst_find_fsidzero_export(rqstp);
1911 if (IS_ERR(exp_ps))
1912 return nfserrno(PTR_ERR(exp_ps));
1913 res = nfsd4_encode_path(&exp_ps->ex_path, path, pp, buflen);
1914 exp_put(exp_ps);
1915 return res;
81c3f413
BF		 1916}
1917
1918/*
1919 * encode a fs_locations structure
1920 */
b37ad28b 1921static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
81c3f413 1922 struct svc_export *exp,
2ebbc012 1923 __be32 **pp, int *buflen)
81c3f413 1924{
b37ad28b 1925 __be32 status;
cc45f017 1926 int i;
2ebbc012 1927 __be32 *p = *pp;
81c3f413 1928 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
81c3f413 1929
ed748aac 1930 status = nfsd4_encode_fsloc_fsroot(rqstp, &exp->ex_path, &p, buflen);
81c3f413
BF		 1931 if (status)
1932 return status;
1933 if ((*buflen -= 4) < 0)
1934 return nfserr_resource;
1935 WRITE32(fslocs->locations_count);
1936 for (i=0; i<fslocs->locations_count; i++) {
1937 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1938 &p, buflen);
1939 if (status)
1940 return status;
1941 }
1942 *pp = p;
1943 return 0;
1944}
1da177e4 1945
3d2544b1
BF		 1946static u32 nfs4_file_type(umode_t mode)
1947{
1948 switch (mode & S_IFMT) {
1949 case S_IFIFO: return NF4FIFO;
1950 case S_IFCHR: return NF4CHR;
1951 case S_IFDIR: return NF4DIR;
1952 case S_IFBLK: return NF4BLK;
1953 case S_IFLNK: return NF4LNK;
1954 case S_IFREG: return NF4REG;
1955 case S_IFSOCK: return NF4SOCK;
1956 default: return NF4BAD;
1957 };
1958}
1da177e4 1959
b37ad28b 1960static __be32
ab8e4aee 1961nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, kuid_t uid, kgid_t gid,
2ebbc012 1962 __be32 **p, int *buflen)
1da177e4
LT		 1963{
1964 int status;
1965
1966 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1967 return nfserr_resource;
1968 if (whotype != NFS4_ACL_WHO_NAMED)
1969 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
ab8e4aee
EB		 1970 else if (gid_valid(gid))
1971 status = nfsd_map_gid_to_name(rqstp, gid, (u8 *)(*p + 1));
1da177e4 1972 else
ab8e4aee 1973 status = nfsd_map_uid_to_name(rqstp, uid, (u8 *)(*p + 1));
1da177e4
LT		 1974 if (status < 0)
1975 return nfserrno(status);
1976 *p = xdr_encode_opaque(*p, NULL, status);
1977 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1978 BUG_ON(*buflen < 0);
1979 return 0;
1980}
1981
b37ad28b 1982static inline __be32
ab8e4aee 1983nfsd4_encode_user(struct svc_rqst *rqstp, kuid_t user, __be32 **p, int *buflen)
1da177e4 1984{
ab8e4aee
EB		 1985 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, user, INVALID_GID,
1986 p, buflen);
1da177e4
LT		 1987}
1988
b37ad28b 1989static inline __be32
ab8e4aee 1990nfsd4_encode_group(struct svc_rqst *rqstp, kgid_t group, __be32 **p, int *buflen)
1da177e4 1991{
ab8e4aee
EB		 1992 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, INVALID_UID, group,
1993 p, buflen);
1da177e4
LT		 1994}
1995
b37ad28b 1996static inline __be32
ab8e4aee 1997nfsd4_encode_aclname(struct svc_rqst *rqstp, struct nfs4_ace *ace,
2ebbc012 1998 __be32 **p, int *buflen)
1da177e4 1999{
ab8e4aee
EB		 2000 kuid_t uid = INVALID_UID;
2001 kgid_t gid = INVALID_GID;
2002
2003 if (ace->whotype == NFS4_ACL_WHO_NAMED) {
2004 if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
2005 gid = ace->who_gid;
2006 else
2007 uid = ace->who_uid;
2008 }
2009 return nfsd4_encode_name(rqstp, ace->whotype, uid, gid, p, buflen);
1da177e4
LT		 2010}
2011
42ca0993
BF		 2012#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
2013 FATTR4_WORD0_RDATTR_ERROR)
2014#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
2015
18032ca0
DQ		 2016#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2017static inline __be32
2018nfsd4_encode_security_label(struct svc_rqst *rqstp, void *context, int len, __be32 **pp, int *buflen)
2019{
2020 __be32 *p = *pp;
2021
2022 if (*buflen < ((XDR_QUADLEN(len) << 2) + 4 + 4 + 4))
2023 return nfserr_resource;
2024
2025 /*
2026 * For now we use a 0 here to indicate the null translation; in
2027 * the future we may place a call to translation code here.
2028 */
2029 if ((*buflen -= 8) < 0)
2030 return nfserr_resource;
2031
2032 WRITE32(0); /* lfs */
2033 WRITE32(0); /* pi */
2034 p = xdr_encode_opaque(p, context, len);
2035 *buflen -= (XDR_QUADLEN(len) << 2) + 4;
2036
2037 *pp = p;
2038 return 0;
2039}
2040#else
2041static inline __be32
ba4e55bb 2042nfsd4_encode_security_label(struct svc_rqst *rqstp, void *context, int len, __be32 **pp, int *buflen)
18032ca0
DQ		 2043{ return 0; }
2044#endif
2045
b37ad28b 2046static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
42ca0993
BF		 2047{
2048 /* As per referral draft: */
2049 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2050 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2051 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2052 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2053 *rdattr_err = NFSERR_MOVED;
2054 else
2055 return nfserr_moved;
2056 }
2057 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2058 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
2059 return 0;
2060}
1da177e4 2061
ae7095a7
BF		 2062
2063static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2064{
2065 struct path path = exp->ex_path;
2066 int err;
2067
2068 path_get(&path);
2069 while (follow_up(&path)) {
2070 if (path.dentry != path.mnt->mnt_root)
2071 break;
2072 }
3dadecce 2073 err = vfs_getattr(&path, stat);
ae7095a7
BF		 2074 path_put(&path);
2075 return err;
2076}
2077
1da177e4
LT		 2078/*
2079 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2080 * ourselves.
2081 *
84822d0b 2082 * countp is the buffer size in _words_
1da177e4 2083 */
b37ad28b 2084__be32
1da177e4 2085nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
84822d0b 2086 struct dentry *dentry, __be32 **buffer, int count, u32 *bmval,
406a7ea9 2087 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 2088{
2089 u32 bmval0 = bmval[0];
2090 u32 bmval1 = bmval[1];
7e705706 2091 u32 bmval2 = bmval[2];
1da177e4
LT		 2092 struct kstat stat;
2093 struct svc_fh tempfh;
2094 struct kstatfs statfs;
84822d0b 2095 int buflen = count << 2;
2ebbc012 2096 __be32 *attrlenp;
1da177e4
LT		 2097 u32 dummy;
2098 u64 dummy64;
42ca0993 2099 u32 rdattr_err = 0;
84822d0b 2100 __be32 *p = *buffer;
b37ad28b 2101 __be32 status;
b8dd7b9a 2102 int err;
1da177e4
LT		 2103 int aclsupport = 0;
2104 struct nfs4_acl *acl = NULL;
18032ca0
DQ		 2105 void *context = NULL;
2106 int contextlen;
2107 bool contextsupport = false;
7e705706
AA		 2108 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2109 u32 minorversion = resp->cstate.minorversion;
ebabe9a9
CH		 2110 struct path path = {
2111 .mnt = exp->ex_path.mnt,
2112 .dentry = dentry,
2113 };
3d733711 2114 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1da177e4
LT		 2115
2116 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
7e705706
AA		 2117 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
2118 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
2119 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
1da177e4 2120
42ca0993 2121 if (exp->ex_fslocs.migrated) {
7e705706 2122 BUG_ON(bmval[2]);
42ca0993
BF		 2123 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
2124 if (status)
2125 goto out;
2126 }
2127
3dadecce 2128 err = vfs_getattr(&path, &stat);
b8dd7b9a 2129 if (err)
1da177e4 2130 goto out_nfserr;
a16e92ed
BF		 2131 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
2132 FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 2133 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2134 FATTR4_WORD1_SPACE_TOTAL))) {
ebabe9a9 2135 err = vfs_statfs(&path, &statfs);
b8dd7b9a 2136 if (err)
1da177e4
LT		 2137 goto out_nfserr;
2138 }
2139 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
2140 fh_init(&tempfh, NFS4_FHSIZE);
2141 status = fh_compose(&tempfh, exp, dentry, NULL);
2142 if (status)
2143 goto out;
2144 fhp = &tempfh;
2145 }
2146 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
2147 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
b8dd7b9a
AV		 2148 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2149 aclsupport = (err == 0);
1da177e4 2150 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 2151 if (err == -EOPNOTSUPP)
1da177e4 2152 bmval0 &= ~FATTR4_WORD0_ACL;
b8dd7b9a 2153 else if (err == -EINVAL) {
1da177e4
LT		 2154 status = nfserr_attrnotsupp;
2155 goto out;
b8dd7b9a 2156 } else if (err != 0)
1da177e4
LT		 2157 goto out_nfserr;
2158 }
2159 }
1da177e4 2160
18032ca0
DQ		 2161#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2162 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) ||
2163 bmval[0] & FATTR4_WORD0_SUPPORTED_ATTRS) {
2164 err = security_inode_getsecctx(dentry->d_inode,
2165 &context, &contextlen);
2166 contextsupport = (err == 0);
2167 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2168 if (err == -EOPNOTSUPP)
2169 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2170 else if (err)
2171 goto out_nfserr;
2172 }
2173 }
2174#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2175
2b44f1ba
BH		 2176 if (bmval2) {
2177 if ((buflen -= 16) < 0)
2178 goto out_resource;
7e705706
AA		 2179 WRITE32(3);
2180 WRITE32(bmval0);
2181 WRITE32(bmval1);
2182 WRITE32(bmval2);
2b44f1ba
BH		 2183 } else if (bmval1) {
2184 if ((buflen -= 12) < 0)
2185 goto out_resource;
7e705706
AA		 2186 WRITE32(2);
2187 WRITE32(bmval0);
2188 WRITE32(bmval1);
2189 } else {
2b44f1ba
BH		 2190 if ((buflen -= 8) < 0)
2191 goto out_resource;
7e705706
AA		 2192 WRITE32(1);
2193 WRITE32(bmval0);
2194 }
1da177e4
LT		 2195 attrlenp = p++; /* to be backfilled later */
2196
2197 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
7e705706
AA		 2198 u32 word0 = nfsd_suppattrs0(minorversion);
2199 u32 word1 = nfsd_suppattrs1(minorversion);
2200 u32 word2 = nfsd_suppattrs2(minorversion);
2201
42ca0993
BF		 2202 if (!aclsupport)
2203 word0 &= ~FATTR4_WORD0_ACL;
18032ca0
DQ		 2204 if (!contextsupport)
2205 word2 &= ~FATTR4_WORD2_SECURITY_LABEL;
7e705706 2206 if (!word2) {
2b44f1ba
BH		 2207 if ((buflen -= 12) < 0)
2208 goto out_resource;
7e705706
AA		 2209 WRITE32(2);
2210 WRITE32(word0);
2211 WRITE32(word1);
2212 } else {
2b44f1ba
BH		 2213 if ((buflen -= 16) < 0)
2214 goto out_resource;
7e705706
AA		 2215 WRITE32(3);
2216 WRITE32(word0);
2217 WRITE32(word1);
2218 WRITE32(word2);
2219 }
1da177e4
LT		 2220 }
2221 if (bmval0 & FATTR4_WORD0_TYPE) {
2222 if ((buflen -= 4) < 0)
2223 goto out_resource;
3d2544b1 2224 dummy = nfs4_file_type(stat.mode);
1da177e4
LT		 2225 if (dummy == NF4BAD)
2226 goto out_serverfault;
2227 WRITE32(dummy);
2228 }
2229 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
2230 if ((buflen -= 4) < 0)
2231 goto out_resource;
49640001 2232 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
e34ac862 2233 WRITE32(NFS4_FH_PERSISTENT);
49640001 2234 else
e34ac862 2235 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1da177e4
LT		 2236 }
2237 if (bmval0 & FATTR4_WORD0_CHANGE) {
1da177e4
LT		 2238 if ((buflen -= 8) < 0)
2239 goto out_resource;
c654b8a9 2240 write_change(&p, &stat, dentry->d_inode);
1da177e4
LT		 2241 }
2242 if (bmval0 & FATTR4_WORD0_SIZE) {
2243 if ((buflen -= 8) < 0)
2244 goto out_resource;
2245 WRITE64(stat.size);
2246 }
2247 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
2248 if ((buflen -= 4) < 0)
2249 goto out_resource;
2250 WRITE32(1);
2251 }
2252 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
2253 if ((buflen -= 4) < 0)
2254 goto out_resource;
2255 WRITE32(1);
2256 }
2257 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
2258 if ((buflen -= 4) < 0)
2259 goto out_resource;
2260 WRITE32(0);
2261 }
2262 if (bmval0 & FATTR4_WORD0_FSID) {
2263 if ((buflen -= 16) < 0)
2264 goto out_resource;
42ca0993
BF		 2265 if (exp->ex_fslocs.migrated) {
2266 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
2267 WRITE64(NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 2268 } else switch(fsid_source(fhp)) {
2269 case FSIDSOURCE_FSID:
1da177e4
LT		 2270 WRITE64((u64)exp->ex_fsid);
2271 WRITE64((u64)0);
af6a4e28
N		 2272 break;
2273 case FSIDSOURCE_DEV:
1da177e4
LT		 2274 WRITE32(0);
2275 WRITE32(MAJOR(stat.dev));
2276 WRITE32(0);
2277 WRITE32(MINOR(stat.dev));
af6a4e28
N		 2278 break;
2279 case FSIDSOURCE_UUID:
2280 WRITEMEM(exp->ex_uuid, 16);
2281 break;
1da177e4
LT		 2282 }
2283 }
2284 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
2285 if ((buflen -= 4) < 0)
2286 goto out_resource;
2287 WRITE32(0);
2288 }
2289 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
2290 if ((buflen -= 4) < 0)
2291 goto out_resource;
3d733711 2292 WRITE32(nn->nfsd4_lease);
1da177e4
LT		 2293 }
2294 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
2295 if ((buflen -= 4) < 0)
2296 goto out_resource;
42ca0993 2297 WRITE32(rdattr_err);
1da177e4
LT		 2298 }
2299 if (bmval0 & FATTR4_WORD0_ACL) {
2300 struct nfs4_ace *ace;
1da177e4
LT		 2301
2302 if (acl == NULL) {
2303 if ((buflen -= 4) < 0)
2304 goto out_resource;
2305
2306 WRITE32(0);
2307 goto out_acl;
2308 }
2309 if ((buflen -= 4) < 0)
2310 goto out_resource;
2311 WRITE32(acl->naces);
2312
28e05dd8 2313 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
1da177e4
LT		 2314 if ((buflen -= 4*3) < 0)
2315 goto out_resource;
2316 WRITE32(ace->type);
2317 WRITE32(ace->flag);
2318 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
ab8e4aee 2319 status = nfsd4_encode_aclname(rqstp, ace, &p, &buflen);
1da177e4
LT		 2320 if (status == nfserr_resource)
2321 goto out_resource;
2322 if (status)
2323 goto out;
2324 }
2325 }
2326out_acl:
2327 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
2328 if ((buflen -= 4) < 0)
2329 goto out_resource;
2330 WRITE32(aclsupport ?
2331 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2332 }
2333 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
2334 if ((buflen -= 4) < 0)
2335 goto out_resource;
2336 WRITE32(1);
2337 }
2338 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
2339 if ((buflen -= 4) < 0)
2340 goto out_resource;
2930d381 2341 WRITE32(0);
1da177e4
LT		 2342 }
2343 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
2344 if ((buflen -= 4) < 0)
2345 goto out_resource;
2346 WRITE32(1);
2347 }
2348 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2349 if ((buflen -= 4) < 0)
2350 goto out_resource;
2351 WRITE32(1);
2352 }
2353 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2354 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
2355 if (buflen < 0)
2356 goto out_resource;
2357 WRITE32(fhp->fh_handle.fh_size);
2358 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
2359 }
2360 if (bmval0 & FATTR4_WORD0_FILEID) {
2361 if ((buflen -= 8) < 0)
2362 goto out_resource;
40ee5dc6 2363 WRITE64(stat.ino);
1da177e4
LT		 2364 }
2365 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2366 if ((buflen -= 8) < 0)
2367 goto out_resource;
2368 WRITE64((u64) statfs.f_ffree);
2369 }
2370 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2371 if ((buflen -= 8) < 0)
2372 goto out_resource;
2373 WRITE64((u64) statfs.f_ffree);
2374 }
2375 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2376 if ((buflen -= 8) < 0)
2377 goto out_resource;
2378 WRITE64((u64) statfs.f_files);
2379 }
81c3f413
BF		 2380 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2381 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
2382 if (status == nfserr_resource)
2383 goto out_resource;
2384 if (status)
2385 goto out;
2386 }
1da177e4
LT		 2387 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2388 if ((buflen -= 4) < 0)
2389 goto out_resource;
2390 WRITE32(1);
2391 }
2392 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2393 if ((buflen -= 8) < 0)
2394 goto out_resource;
aea240f4 2395 WRITE64(exp->ex_path.mnt->mnt_sb->s_maxbytes);
1da177e4
LT		 2396 }
2397 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2398 if ((buflen -= 4) < 0)
2399 goto out_resource;
2400 WRITE32(255);
2401 }
2402 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2403 if ((buflen -= 4) < 0)
2404 goto out_resource;
a16e92ed 2405 WRITE32(statfs.f_namelen);
1da177e4
LT		 2406 }
2407 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2408 if ((buflen -= 8) < 0)
2409 goto out_resource;
7adae489 2410 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 2411 }
2412 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2413 if ((buflen -= 8) < 0)
2414 goto out_resource;
7adae489 2415 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 2416 }
2417 if (bmval1 & FATTR4_WORD1_MODE) {
2418 if ((buflen -= 4) < 0)
2419 goto out_resource;
2420 WRITE32(stat.mode & S_IALLUGO);
2421 }
2422 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2423 if ((buflen -= 4) < 0)
2424 goto out_resource;
2425 WRITE32(1);
2426 }
2427 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2428 if ((buflen -= 4) < 0)
2429 goto out_resource;
2430 WRITE32(stat.nlink);
2431 }
2432 if (bmval1 & FATTR4_WORD1_OWNER) {
2433 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
2434 if (status == nfserr_resource)
2435 goto out_resource;
2436 if (status)
2437 goto out;
2438 }
2439 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2440 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
2441 if (status == nfserr_resource)
2442 goto out_resource;
2443 if (status)
2444 goto out;
2445 }
2446 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2447 if ((buflen -= 8) < 0)
2448 goto out_resource;
2449 WRITE32((u32) MAJOR(stat.rdev));
2450 WRITE32((u32) MINOR(stat.rdev));
2451 }
2452 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2453 if ((buflen -= 8) < 0)
2454 goto out_resource;
2455 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2456 WRITE64(dummy64);
2457 }
2458 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2459 if ((buflen -= 8) < 0)
2460 goto out_resource;
2461 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2462 WRITE64(dummy64);
2463 }
2464 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2465 if ((buflen -= 8) < 0)
2466 goto out_resource;
2467 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2468 WRITE64(dummy64);
2469 }
2470 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2471 if ((buflen -= 8) < 0)
2472 goto out_resource;
2473 dummy64 = (u64)stat.blocks << 9;
2474 WRITE64(dummy64);
2475 }
2476 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2477 if ((buflen -= 12) < 0)
2478 goto out_resource;
bf8d9097 2479 WRITE64((s64)stat.atime.tv_sec);
1da177e4
LT		 2480 WRITE32(stat.atime.tv_nsec);
2481 }
2482 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2483 if ((buflen -= 12) < 0)
2484 goto out_resource;
2485 WRITE32(0);
2486 WRITE32(1);
2487 WRITE32(0);
2488 }
2489 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2490 if ((buflen -= 12) < 0)
2491 goto out_resource;
bf8d9097 2492 WRITE64((s64)stat.ctime.tv_sec);
1da177e4
LT		 2493 WRITE32(stat.ctime.tv_nsec);
2494 }
2495 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2496 if ((buflen -= 12) < 0)
2497 goto out_resource;
bf8d9097 2498 WRITE64((s64)stat.mtime.tv_sec);
1da177e4
LT		 2499 WRITE32(stat.mtime.tv_nsec);
2500 }
2501 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
1da177e4
LT		 2502 if ((buflen -= 8) < 0)
2503 goto out_resource;
406a7ea9
FF		 2504 /*
2505 * Get parent's attributes if not ignoring crossmount
2506 * and this is the root of a cross-mounted filesystem.
2507 */
2508 if (ignore_crossmnt == 0 &&
ae7095a7
BF		 2509 dentry == exp->ex_path.mnt->mnt_root)
2510 get_parent_attributes(exp, &stat);
40ee5dc6 2511 WRITE64(stat.ino);
1da177e4 2512 }
18032ca0
DQ		 2513 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2514 status = nfsd4_encode_security_label(rqstp, context,
2515 contextlen, &p, &buflen);
2516 if (status)
2517 goto out;
2518 }
8c18f205
BH		 2519 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2520 WRITE32(3);
2521 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2522 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2523 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2524 }
7e705706 2525
1da177e4 2526 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
84822d0b 2527 *buffer = p;
1da177e4
LT		 2528 status = nfs_ok;
2529
2530out:
ba4e55bb 2531#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
18032ca0
DQ		 2532 if (context)
2533 security_release_secctx(context, contextlen);
ba4e55bb 2534#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
28e05dd8 2535 kfree(acl);
1da177e4
LT		 2536 if (fhp == &tempfh)
2537 fh_put(&tempfh);
2538 return status;
2539out_nfserr:
b8dd7b9a 2540 status = nfserrno(err);
1da177e4
LT		 2541 goto out;
2542out_resource:
1da177e4
LT		 2543 status = nfserr_resource;
2544 goto out;
2545out_serverfault:
2546 status = nfserr_serverfault;
2547 goto out;
2548}
2549
c0ce6ec8
BF		 2550static inline int attributes_need_mount(u32 *bmval)
2551{
2552 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2553 return 1;
2554 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2555 return 1;
2556 return 0;
2557}
2558
b37ad28b 2559static __be32
1da177e4 2560nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
84822d0b 2561 const char *name, int namlen, __be32 **p, int buflen)
1da177e4
LT		 2562{
2563 struct svc_export *exp = cd->rd_fhp->fh_export;
2564 struct dentry *dentry;
b37ad28b 2565 __be32 nfserr;
406a7ea9 2566 int ignore_crossmnt = 0;
1da177e4
LT		 2567
2568 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2569 if (IS_ERR(dentry))
2570 return nfserrno(PTR_ERR(dentry));
b2c0cea6
BF		 2571 if (!dentry->d_inode) {
2572 /*
2573 * nfsd_buffered_readdir drops the i_mutex between
2574 * readdir and calling this callback, leaving a window
2575 * where this directory entry could have gone away.
2576 */
2577 dput(dentry);
2578 return nfserr_noent;
2579 }
1da177e4
LT		 2580
2581 exp_get(exp);
406a7ea9
FF		 2582 /*
2583 * In the case of a mountpoint, the client may be asking for
2584 * attributes that are only properties of the underlying filesystem
2585 * as opposed to the cross-mounted file system. In such a case,
2586 * we will not follow the cross mount and will fill the attribtutes
2587 * directly from the mountpoint dentry.
2588 */
3227fa41 2589 if (nfsd_mountpoint(dentry, exp)) {
021d3a72
BF		 2590 int err;
2591
3227fa41
BF		 2592 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2593 && !attributes_need_mount(cd->rd_bmval)) {
2594 ignore_crossmnt = 1;
2595 goto out_encode;
2596 }
dcb488a3
AA		 2597 /*
2598 * Why the heck aren't we just using nfsd_lookup??
2599 * Different "."/".." handling? Something else?
2600 * At least, add a comment here to explain....
2601 */
021d3a72
BF		 2602 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2603 if (err) {
2604 nfserr = nfserrno(err);
1da177e4
LT		 2605 goto out_put;
2606 }
dcb488a3
AA		 2607 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2608 if (nfserr)
2609 goto out_put;
1da177e4
LT		 2610
2611 }
3227fa41 2612out_encode:
1da177e4 2613 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
406a7ea9 2614 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 2615out_put:
2616 dput(dentry);
2617 exp_put(exp);
2618 return nfserr;
2619}
2620
2ebbc012 2621static __be32 *
b37ad28b 2622nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
1da177e4 2623{
2ebbc012 2624 __be32 *attrlenp;
1da177e4
LT		 2625
2626 if (buflen < 6)
2627 return NULL;
2628 *p++ = htonl(2);
2629 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2630 *p++ = htonl(0); /* bmval1 */
2631
2632 attrlenp = p++;
2633 *p++ = nfserr; /* no htonl */
2634 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2635 return p;
2636}
2637
2638static int
a0ad13ef
N		 2639nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2640 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 2641{
a0ad13ef 2642 struct readdir_cd *ccd = ccdv;
1da177e4
LT		 2643 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2644 int buflen;
2ebbc012 2645 __be32 *p = cd->buffer;
b2c0cea6 2646 __be32 *cookiep;
b37ad28b 2647 __be32 nfserr = nfserr_toosmall;
1da177e4
LT		 2648
2649 /* In nfsv4, "." and ".." never make it onto the wire.. */
2650 if (name && isdotent(name, namlen)) {
2651 cd->common.err = nfs_ok;
2652 return 0;
2653 }
2654
2655 if (cd->offset)
2656 xdr_encode_hyper(cd->offset, (u64) offset);
2657
2658 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2659 if (buflen < 0)
2660 goto fail;
2661
2662 *p++ = xdr_one; /* mark entry present */
b2c0cea6 2663 cookiep = p;
1da177e4
LT		 2664 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2665 p = xdr_encode_array(p, name, namlen); /* name length & name */
2666
84822d0b 2667 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, &p, buflen);
1da177e4
LT		 2668 switch (nfserr) {
2669 case nfs_ok:
1da177e4
LT		 2670 break;
2671 case nfserr_resource:
2672 nfserr = nfserr_toosmall;
2673 goto fail;
b2c0cea6
BF		 2674 case nfserr_noent:
2675 goto skip_entry;
1da177e4
LT		 2676 default:
2677 /*
2678 * If the client requested the RDATTR_ERROR attribute,
2679 * we stuff the error code into this attribute
2680 * and continue. If this attribute was not requested,
2681 * then in accordance with the spec, we fail the
2682 * entire READDIR operation(!)
2683 */
2684 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2685 goto fail;
1da177e4 2686 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
34081efc
FI		 2687 if (p == NULL) {
2688 nfserr = nfserr_toosmall;
1da177e4 2689 goto fail;
34081efc 2690 }
1da177e4
LT		 2691 }
2692 cd->buflen -= (p - cd->buffer);
2693 cd->buffer = p;
b2c0cea6
BF		 2694 cd->offset = cookiep;
2695skip_entry:
1da177e4
LT		 2696 cd->common.err = nfs_ok;
2697 return 0;
2698fail:
2699 cd->common.err = nfserr;
2700 return -EINVAL;
2701}
2702
e2f282b9
BH		 2703static void
2704nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2705{
bc749ca4 2706 __be32 *p;
e2f282b9
BH		 2707
2708 RESERVE_SPACE(sizeof(stateid_t));
2709 WRITE32(sid->si_generation);
2710 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2711 ADJUST_ARGS();
2712}
2713
695e12f8 2714static __be32
b37ad28b 2715nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4 2716{
bc749ca4 2717 __be32 *p;
1da177e4
LT		 2718
2719 if (!nfserr) {
2720 RESERVE_SPACE(8);
2721 WRITE32(access->ac_supported);
2722 WRITE32(access->ac_resp_access);
2723 ADJUST_ARGS();
2724 }
695e12f8 2725 return nfserr;
1da177e4
LT		 2726}
2727
1d1bc8f2
BF		 2728static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
2729{
2730 __be32 *p;
2731
2732 if (!nfserr) {
2733 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 8);
2734 WRITEMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
2735 WRITE32(bcts->dir);
6e67b5d1 2736 /* Sorry, we do not yet support RDMA over 4.1: */
1d1bc8f2
BF		 2737 WRITE32(0);
2738 ADJUST_ARGS();
2739 }
2740 return nfserr;
2741}
2742
695e12f8 2743static __be32
b37ad28b 2744nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4 2745{
e2f282b9
BH		 2746 if (!nfserr)
2747 nfsd4_encode_stateid(resp, &close->cl_stateid);
2748
695e12f8 2749 return nfserr;
1da177e4
LT		 2750}
2751
2752
695e12f8 2753static __be32
b37ad28b 2754nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4 2755{
bc749ca4 2756 __be32 *p;
1da177e4
LT		 2757
2758 if (!nfserr) {
ab4684d1
CL		 2759 RESERVE_SPACE(NFS4_VERIFIER_SIZE);
2760 WRITEMEM(commit->co_verf.data, NFS4_VERIFIER_SIZE);
1da177e4
LT		 2761 ADJUST_ARGS();
2762 }
695e12f8 2763 return nfserr;
1da177e4
LT		 2764}
2765
695e12f8 2766static __be32
b37ad28b 2767nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4 2768{
bc749ca4 2769 __be32 *p;
1da177e4
LT		 2770
2771 if (!nfserr) {
2772 RESERVE_SPACE(32);
c654b8a9 2773 write_cinfo(&p, &create->cr_cinfo);
1da177e4
LT		 2774 WRITE32(2);
2775 WRITE32(create->cr_bmval[0]);
2776 WRITE32(create->cr_bmval[1]);
2777 ADJUST_ARGS();
2778 }
695e12f8 2779 return nfserr;
1da177e4
LT		 2780}
2781
b37ad28b
AV		 2782static __be32
2783nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 2784{
2785 struct svc_fh *fhp = getattr->ga_fhp;
2786 int buflen;
2787
2788 if (nfserr)
2789 return nfserr;
2790
2791 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2792 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
84822d0b 2793 &resp->p, buflen, getattr->ga_bmval,
406a7ea9 2794 resp->rqstp, 0);
1da177e4
LT		 2795 return nfserr;
2796}
2797
695e12f8
BH		 2798static __be32
2799nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
1da177e4 2800{
695e12f8 2801 struct svc_fh *fhp = *fhpp;
1da177e4 2802 unsigned int len;
bc749ca4 2803 __be32 *p;
1da177e4
LT		 2804
2805 if (!nfserr) {
2806 len = fhp->fh_handle.fh_size;
2807 RESERVE_SPACE(len + 4);
2808 WRITE32(len);
2809 WRITEMEM(&fhp->fh_handle.fh_base, len);
2810 ADJUST_ARGS();
2811 }
695e12f8 2812 return nfserr;
1da177e4
LT		 2813}
2814
2815/*
2816* Including all fields other than the name, a LOCK4denied structure requires
2817* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2818*/
2819static void
2820nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2821{
7c13f344 2822 struct xdr_netobj *conf = &ld->ld_owner;
bc749ca4 2823 __be32 *p;
1da177e4 2824
7c13f344 2825 RESERVE_SPACE(32 + XDR_LEN(conf->len));
1da177e4
LT		 2826 WRITE64(ld->ld_start);
2827 WRITE64(ld->ld_length);
2828 WRITE32(ld->ld_type);
7c13f344 2829 if (conf->len) {
1da177e4 2830 WRITEMEM(&ld->ld_clientid, 8);
7c13f344
BF		 2831 WRITE32(conf->len);
2832 WRITEMEM(conf->data, conf->len);
2833 kfree(conf->data);
1da177e4
LT		 2834 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2835 WRITE64((u64)0); /* clientid */
2836 WRITE32(0); /* length of owner name */
2837 }
2838 ADJUST_ARGS();
2839}
2840
695e12f8 2841static __be32
b37ad28b 2842nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 2843{
e2f282b9
BH		 2844 if (!nfserr)
2845 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2846 else if (nfserr == nfserr_denied)
1da177e4
LT		 2847 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2848
695e12f8 2849 return nfserr;
1da177e4
LT		 2850}
2851
695e12f8 2852static __be32
b37ad28b 2853nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4
LT		 2854{
2855 if (nfserr == nfserr_denied)
2856 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
695e12f8 2857 return nfserr;
1da177e4
LT		 2858}
2859
695e12f8 2860static __be32
b37ad28b 2861nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4 2862{
e2f282b9
BH		 2863 if (!nfserr)
2864 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2865
695e12f8 2866 return nfserr;
1da177e4
LT		 2867}
2868
2869
695e12f8 2870static __be32
b37ad28b 2871nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4 2872{
bc749ca4 2873 __be32 *p;
1da177e4
LT		 2874
2875 if (!nfserr) {
2876 RESERVE_SPACE(20);
c654b8a9 2877 write_cinfo(&p, &link->li_cinfo);
1da177e4
LT		 2878 ADJUST_ARGS();
2879 }
695e12f8 2880 return nfserr;
1da177e4
LT		 2881}
2882
2883
695e12f8 2884static __be32
b37ad28b 2885nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4 2886{
bc749ca4 2887 __be32 *p;
1da177e4
LT		 2888
2889 if (nfserr)
2890 goto out;
2891
e2f282b9
BH		 2892 nfsd4_encode_stateid(resp, &open->op_stateid);
2893 RESERVE_SPACE(40);
c654b8a9 2894 write_cinfo(&p, &open->op_cinfo);
1da177e4
LT		 2895 WRITE32(open->op_rflags);
2896 WRITE32(2);
2897 WRITE32(open->op_bmval[0]);
2898 WRITE32(open->op_bmval[1]);
2899 WRITE32(open->op_delegate_type);
2900 ADJUST_ARGS();
2901
2902 switch (open->op_delegate_type) {
2903 case NFS4_OPEN_DELEGATE_NONE:
2904 break;
2905 case NFS4_OPEN_DELEGATE_READ:
e2f282b9
BH		 2906 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2907 RESERVE_SPACE(20);
7b190fec 2908 WRITE32(open->op_recall);
1da177e4
LT		 2909
2910 /*
2911 * TODO: ACE's in delegations
2912 */
2913 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2914 WRITE32(0);
2915 WRITE32(0);
2916 WRITE32(0); /* XXX: is NULL principal ok? */
2917 ADJUST_ARGS();
2918 break;
2919 case NFS4_OPEN_DELEGATE_WRITE:
e2f282b9
BH		 2920 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2921 RESERVE_SPACE(32);
1da177e4
LT		 2922 WRITE32(0);
2923
2924 /*
2925 * TODO: space_limit's in delegations
2926 */
2927 WRITE32(NFS4_LIMIT_SIZE);
2928 WRITE32(~(u32)0);
2929 WRITE32(~(u32)0);
2930
2931 /*
2932 * TODO: ACE's in delegations
2933 */
2934 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2935 WRITE32(0);
2936 WRITE32(0);
2937 WRITE32(0); /* XXX: is NULL principal ok? */
2938 ADJUST_ARGS();
2939 break;
d24433cd
BH		 2940 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
2941 switch (open->op_why_no_deleg) {
2942 case WND4_CONTENTION:
2943 case WND4_RESOURCE:
2944 RESERVE_SPACE(8);
2945 WRITE32(open->op_why_no_deleg);
2946 WRITE32(0); /* deleg signaling not supported yet */
2947 break;
2948 default:
2949 RESERVE_SPACE(4);
2950 WRITE32(open->op_why_no_deleg);
2951 }
2952 ADJUST_ARGS();
2953 break;
1da177e4
LT		 2954 default:
2955 BUG();
2956 }
2957 /* XXX save filehandle here */
2958out:
695e12f8 2959 return nfserr;
1da177e4
LT		 2960}
2961
695e12f8 2962static __be32
b37ad28b 2963nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4 2964{
e2f282b9
BH		 2965 if (!nfserr)
2966 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
1da177e4 2967
695e12f8 2968 return nfserr;
1da177e4
LT		 2969}
2970
695e12f8 2971static __be32
b37ad28b 2972nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4 2973{
e2f282b9
BH		 2974 if (!nfserr)
2975 nfsd4_encode_stateid(resp, &od->od_stateid);
1da177e4 2976
695e12f8 2977 return nfserr;
1da177e4
LT		 2978}
2979
b37ad28b
AV		 2980static __be32
2981nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
44524359 2982 struct nfsd4_read *read)
1da177e4
LT		 2983{
2984 u32 eof;
afc59400
BF		 2985 int v;
2986 struct page *page;
1da177e4
LT		 2987 unsigned long maxcount;
2988 long len;
bc749ca4 2989 __be32 *p;
1da177e4
LT		 2990
2991 if (nfserr)
2992 return nfserr;
2993 if (resp->xbuf->page_len)
2994 return nfserr_resource;
2995
2996 RESERVE_SPACE(8); /* eof flag and byte count */
2997
7adae489 2998 maxcount = svc_max_payload(resp->rqstp);
1da177e4
LT		 2999 if (maxcount > read->rd_length)
3000 maxcount = read->rd_length;
3001
3002 len = maxcount;
3003 v = 0;
3004 while (len > 0) {
afc59400
BF		 3005 page = *(resp->rqstp->rq_next_page);
3006 if (!page) { /* ran out of pages */
d5f50b0c
BF		 3007 maxcount -= len;
3008 break;
3009 }
afc59400 3010 resp->rqstp->rq_vec[v].iov_base = page_address(page);
3cc03b16 3011 resp->rqstp->rq_vec[v].iov_len =
44524359 3012 len < PAGE_SIZE ? len : PAGE_SIZE;
afc59400 3013 resp->rqstp->rq_next_page++;
1da177e4
LT		 3014 v++;
3015 len -= PAGE_SIZE;
3016 }
3017 read->rd_vlen = v;
3018
039a87ca 3019 nfserr = nfsd_read_file(read->rd_rqstp, read->rd_fhp, read->rd_filp,
3cc03b16 3020 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
1da177e4
LT		 3021 &maxcount);
3022
1da177e4
LT		 3023 if (nfserr)
3024 return nfserr;
44524359
N		 3025 eof = (read->rd_offset + maxcount >=
3026 read->rd_fhp->fh_dentry->d_inode->i_size);
1da177e4
LT		 3027
3028 WRITE32(eof);
3029 WRITE32(maxcount);
3030 ADJUST_ARGS();
6ed6decc
N		 3031 resp->xbuf->head[0].iov_len = (char*)p
3032 - (char*)resp->xbuf->head[0].iov_base;
1da177e4
LT		 3033 resp->xbuf->page_len = maxcount;
3034
6ed6decc 3035 /* Use rest of head for padding and remaining ops: */
6ed6decc 3036 resp->xbuf->tail[0].iov_base = p;
1da177e4 3037 resp->xbuf->tail[0].iov_len = 0;
1da177e4 3038 if (maxcount&3) {
6ed6decc
N		 3039 RESERVE_SPACE(4);
3040 WRITE32(0);
1da177e4
LT		 3041 resp->xbuf->tail[0].iov_base += maxcount&3;
3042 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 3043 ADJUST_ARGS();
1da177e4
LT		 3044 }
3045 return 0;
3046}
3047
b37ad28b
AV		 3048static __be32
3049nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 3050{
3051 int maxcount;
3052 char *page;
bc749ca4 3053 __be32 *p;
1da177e4
LT		 3054
3055 if (nfserr)
3056 return nfserr;
3057 if (resp->xbuf->page_len)
3058 return nfserr_resource;
afc59400 3059 if (!*resp->rqstp->rq_next_page)
d5f50b0c 3060 return nfserr_resource;
1da177e4 3061
afc59400 3062 page = page_address(*(resp->rqstp->rq_next_page++));
1da177e4
LT		 3063
3064 maxcount = PAGE_SIZE;
3065 RESERVE_SPACE(4);
3066
3067 /*
3068 * XXX: By default, the ->readlink() VFS op will truncate symlinks
3069 * if they would overflow the buffer. Is this kosher in NFSv4? If
3070 * not, one easy fix is: if ->readlink() precisely fills the buffer,
3071 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
3072 */
3073 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
3074 if (nfserr == nfserr_isdir)
3075 return nfserr_inval;
3076 if (nfserr)
3077 return nfserr;
3078
3079 WRITE32(maxcount);
3080 ADJUST_ARGS();
6ed6decc
N		 3081 resp->xbuf->head[0].iov_len = (char*)p
3082 - (char*)resp->xbuf->head[0].iov_base;
3083 resp->xbuf->page_len = maxcount;
1da177e4 3084
6ed6decc 3085 /* Use rest of head for padding and remaining ops: */
6ed6decc 3086 resp->xbuf->tail[0].iov_base = p;
1da177e4 3087 resp->xbuf->tail[0].iov_len = 0;
1da177e4 3088 if (maxcount&3) {
6ed6decc
N		 3089 RESERVE_SPACE(4);
3090 WRITE32(0);
1da177e4
LT		 3091 resp->xbuf->tail[0].iov_base += maxcount&3;
3092 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 3093 ADJUST_ARGS();
1da177e4
LT		 3094 }
3095 return 0;
3096}
3097
b37ad28b
AV		 3098static __be32
3099nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 3100{
3101 int maxcount;
3102 loff_t offset;
2ebbc012 3103 __be32 *page, *savep, *tailbase;
bc749ca4 3104 __be32 *p;
1da177e4
LT		 3105
3106 if (nfserr)
3107 return nfserr;
3108 if (resp->xbuf->page_len)
3109 return nfserr_resource;
afc59400 3110 if (!*resp->rqstp->rq_next_page)
d5f50b0c 3111 return nfserr_resource;
1da177e4 3112
ab4684d1 3113 RESERVE_SPACE(NFS4_VERIFIER_SIZE);
1da177e4
LT		 3114 savep = p;
3115
3116 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
3117 WRITE32(0);
3118 WRITE32(0);
3119 ADJUST_ARGS();
3120 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
bb6e8a9f 3121 tailbase = p;
1da177e4
LT		 3122
3123 maxcount = PAGE_SIZE;
3124 if (maxcount > readdir->rd_maxcount)
3125 maxcount = readdir->rd_maxcount;
3126
3127 /*
3128 * Convert from bytes to words, account for the two words already
3129 * written, make sure to leave two words at the end for the next
3130 * pointer and eof field.
3131 */
3132 maxcount = (maxcount >> 2) - 4;
3133 if (maxcount < 0) {
3134 nfserr = nfserr_toosmall;
3135 goto err_no_verf;
3136 }
3137
afc59400 3138 page = page_address(*(resp->rqstp->rq_next_page++));
1da177e4
LT		 3139 readdir->common.err = 0;
3140 readdir->buflen = maxcount;
3141 readdir->buffer = page;
3142 readdir->offset = NULL;
3143
3144 offset = readdir->rd_cookie;
3145 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3146 &offset,
3147 &readdir->common, nfsd4_encode_dirent);
3148 if (nfserr == nfs_ok &&
3149 readdir->common.err == nfserr_toosmall &&
3150 readdir->buffer == page)
3151 nfserr = nfserr_toosmall;
1da177e4
LT		 3152 if (nfserr)
3153 goto err_no_verf;
3154
3155 if (readdir->offset)
3156 xdr_encode_hyper(readdir->offset, offset);
3157
3158 p = readdir->buffer;
3159 *p++ = 0; /* no more entries */
3160 *p++ = htonl(readdir->common.err == nfserr_eof);
afc59400
BF		 3161 resp->xbuf->page_len = ((char*)p) -
3162 (char*)page_address(*(resp->rqstp->rq_next_page-1));
1da177e4 3163
bb6e8a9f 3164 /* Use rest of head for padding and remaining ops: */
bb6e8a9f 3165 resp->xbuf->tail[0].iov_base = tailbase;
1da177e4
LT		 3166 resp->xbuf->tail[0].iov_len = 0;
3167 resp->p = resp->xbuf->tail[0].iov_base;
bb6e8a9f 3168 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
1da177e4
LT		 3169
3170 return 0;
3171err_no_verf:
3172 p = savep;
3173 ADJUST_ARGS();
3174 return nfserr;
3175}
3176
695e12f8 3177static __be32
b37ad28b 3178nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4 3179{
bc749ca4 3180 __be32 *p;
1da177e4
LT		 3181
3182 if (!nfserr) {
3183 RESERVE_SPACE(20);
c654b8a9 3184 write_cinfo(&p, &remove->rm_cinfo);
1da177e4
LT		 3185 ADJUST_ARGS();
3186 }
695e12f8 3187 return nfserr;
1da177e4
LT		 3188}
3189
695e12f8 3190static __be32
b37ad28b 3191nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4 3192{
bc749ca4 3193 __be32 *p;
1da177e4
LT		 3194
3195 if (!nfserr) {
3196 RESERVE_SPACE(40);
c654b8a9
BF		 3197 write_cinfo(&p, &rename->rn_sinfo);
3198 write_cinfo(&p, &rename->rn_tinfo);
1da177e4
LT		 3199 ADJUST_ARGS();
3200 }
695e12f8 3201 return nfserr;
1da177e4
LT		 3202}
3203
695e12f8 3204static __be32
22b6dee8 3205nfsd4_do_encode_secinfo(struct nfsd4_compoundres *resp,
a77c806f 3206 __be32 nfserr, struct svc_export *exp)
dcb488a3 3207{
676e4ebd 3208 u32 i, nflavs, supported;
4796f457
BF		 3209 struct exp_flavor_info *flavs;
3210 struct exp_flavor_info def_flavs[2];
676e4ebd
CL		 3211 __be32 *p, *flavorsp;
3212 static bool report = true;
dcb488a3
AA		 3213
3214 if (nfserr)
3215 goto out;
4796f457
BF		 3216 if (exp->ex_nflavors) {
3217 flavs = exp->ex_flavors;
3218 nflavs = exp->ex_nflavors;
3219 } else { /* Handling of some defaults in absence of real secinfo: */
3220 flavs = def_flavs;
3221 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3222 nflavs = 2;
3223 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3224 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3225 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3226 nflavs = 1;
3227 flavs[0].pseudoflavor
3228 = svcauth_gss_flavor(exp->ex_client);
3229 } else {
3230 nflavs = 1;
3231 flavs[0].pseudoflavor
3232 = exp->ex_client->flavour->flavour;
3233 }
3234 }
3235
676e4ebd 3236 supported = 0;
dcb488a3 3237 RESERVE_SPACE(4);
676e4ebd 3238 flavorsp = p++; /* to be backfilled later */
dcb488a3 3239 ADJUST_ARGS();
676e4ebd 3240
4796f457 3241 for (i = 0; i < nflavs; i++) {
676e4ebd 3242 rpc_authflavor_t pf = flavs[i].pseudoflavor;
a77c806f 3243 struct rpcsec_gss_info info;
dcb488a3 3244
676e4ebd
CL		 3245 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3246 supported++;
ed9411a0 3247 RESERVE_SPACE(4 + 4 + info.oid.len + 4 + 4);
dcb488a3 3248 WRITE32(RPC_AUTH_GSS);
a77c806f
CL		 3249 WRITE32(info.oid.len);
3250 WRITEMEM(info.oid.data, info.oid.len);
a77c806f 3251 WRITE32(info.qop);
a77c806f 3252 WRITE32(info.service);
dcb488a3 3253 ADJUST_ARGS();
676e4ebd
CL		 3254 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3255 supported++;
dcb488a3 3256 RESERVE_SPACE(4);
676e4ebd 3257 WRITE32(pf);
dcb488a3 3258 ADJUST_ARGS();
676e4ebd
CL		 3259 } else {
3260 if (report)
3261 pr_warn("NFS: SECINFO: security flavor %u "
3262 "is not supported\n", pf);
dcb488a3
AA		 3263 }
3264 }
a77c806f 3265
676e4ebd
CL		 3266 if (nflavs != supported)
3267 report = false;
3268 *flavorsp = htonl(supported);
3269
dcb488a3
AA		 3270out:
3271 if (exp)
3272 exp_put(exp);
695e12f8 3273 return nfserr;
dcb488a3
AA		 3274}
3275
22b6dee8
MJ		 3276static __be32
3277nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3278 struct nfsd4_secinfo *secinfo)
3279{
3280 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->si_exp);
3281}
3282
3283static __be32
3284nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3285 struct nfsd4_secinfo_no_name *secinfo)
3286{
3287 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->sin_exp);
3288}
3289
1da177e4
LT		 3290/*
3291 * The SETATTR encode routine is special -- it always encodes a bitmap,
3292 * regardless of the error status.
3293 */
695e12f8 3294static __be32
b37ad28b 3295nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4 3296{
bc749ca4 3297 __be32 *p;
1da177e4 3298
18032ca0 3299 RESERVE_SPACE(16);
1da177e4 3300 if (nfserr) {
18032ca0
DQ		 3301 WRITE32(3);
3302 WRITE32(0);
1da177e4
LT		 3303 WRITE32(0);
3304 WRITE32(0);
3305 }
3306 else {
18032ca0 3307 WRITE32(3);
1da177e4
LT		 3308 WRITE32(setattr->sa_bmval[0]);
3309 WRITE32(setattr->sa_bmval[1]);
18032ca0 3310 WRITE32(setattr->sa_bmval[2]);
1da177e4
LT		 3311 }
3312 ADJUST_ARGS();
695e12f8 3313 return nfserr;
1da177e4
LT		 3314}
3315
695e12f8 3316static __be32
b37ad28b 3317nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4 3318{
bc749ca4 3319 __be32 *p;
1da177e4
LT		 3320
3321 if (!nfserr) {
ab4684d1 3322 RESERVE_SPACE(8 + NFS4_VERIFIER_SIZE);
1da177e4 3323 WRITEMEM(&scd->se_clientid, 8);
ab4684d1 3324 WRITEMEM(&scd->se_confirm, NFS4_VERIFIER_SIZE);
1da177e4
LT		 3325 ADJUST_ARGS();
3326 }
3327 else if (nfserr == nfserr_clid_inuse) {
3328 RESERVE_SPACE(8);
3329 WRITE32(0);
3330 WRITE32(0);
3331 ADJUST_ARGS();
3332 }
695e12f8 3333 return nfserr;
1da177e4
LT		 3334}
3335
695e12f8 3336static __be32
b37ad28b 3337nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4 3338{
bc749ca4 3339 __be32 *p;
1da177e4
LT		 3340
3341 if (!nfserr) {
3342 RESERVE_SPACE(16);
3343 WRITE32(write->wr_bytes_written);
3344 WRITE32(write->wr_how_written);
ab4684d1 3345 WRITEMEM(write->wr_verifier.data, NFS4_VERIFIER_SIZE);
1da177e4
LT		 3346 ADJUST_ARGS();
3347 }
695e12f8 3348 return nfserr;
1da177e4
LT		 3349}
3350
57266a6e
BF		 3351static const u32 nfs4_minimal_spo_must_enforce[2] = {
3352 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
3353 1 << (OP_EXCHANGE_ID - 32) |
3354 1 << (OP_CREATE_SESSION - 32) |
3355 1 << (OP_DESTROY_SESSION - 32) |
3356 1 << (OP_DESTROY_CLIENTID - 32)
3357};
3358
2db134eb 3359static __be32
57b7b43b 3360nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3361 struct nfsd4_exchange_id *exid)
3362{
bc749ca4 3363 __be32 *p;
0733d213
AA		 3364 char *major_id;
3365 char *server_scope;
3366 int major_id_sz;
3367 int server_scope_sz;
3368 uint64_t minor_id = 0;
3369
3370 if (nfserr)
3371 return nfserr;
3372
3373 major_id = utsname()->nodename;
3374 major_id_sz = strlen(major_id);
3375 server_scope = utsname()->nodename;
3376 server_scope_sz = strlen(server_scope);
3377
3378 RESERVE_SPACE(
3379 8 /* eir_clientid */ +
3380 4 /* eir_sequenceid */ +
3381 4 /* eir_flags */ +
58cd57bf
WAA		 3382 4 /* spr_how */ +
3383 8 /* spo_must_enforce, spo_must_allow */ +
0733d213
AA		 3384 8 /* so_minor_id */ +
3385 4 /* so_major_id.len */ +
3386 (XDR_QUADLEN(major_id_sz) * 4) +
3387 4 /* eir_server_scope.len */ +
3388 (XDR_QUADLEN(server_scope_sz) * 4) +
3389 4 /* eir_server_impl_id.count (0) */);
3390
3391 WRITEMEM(&exid->clientid, 8);
3392 WRITE32(exid->seqid);
3393 WRITE32(exid->flags);
3394
0733d213 3395 WRITE32(exid->spa_how);
57266a6e
BF		 3396 switch (exid->spa_how) {
3397 case SP4_NONE:
3398 break;
3399 case SP4_MACH_CRED:
3400 /* spo_must_enforce bitmap: */
3401 WRITE32(2);
3402 WRITE32(nfs4_minimal_spo_must_enforce[0]);
3403 WRITE32(nfs4_minimal_spo_must_enforce[1]);
3404 /* empty spo_must_allow bitmap: */
3405 WRITE32(0);
3406 break;
3407 default:
3408 WARN_ON_ONCE(1);
3409 }
0733d213
AA		 3410
3411 /* The server_owner struct */
3412 WRITE64(minor_id); /* Minor id */
3413 /* major id */
3414 WRITE32(major_id_sz);
3415 WRITEMEM(major_id, major_id_sz);
3416
3417 /* Server scope */
3418 WRITE32(server_scope_sz);
3419 WRITEMEM(server_scope, server_scope_sz);
3420
3421 /* Implementation id */
3422 WRITE32(0); /* zero length nfs_impl_id4 array */
3423 ADJUST_ARGS();
3424 return 0;
2db134eb
AA		 3425}
3426
3427static __be32
57b7b43b 3428nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3429 struct nfsd4_create_session *sess)
3430{
bc749ca4 3431 __be32 *p;
ec6b5d7b
AA		 3432
3433 if (nfserr)
3434 return nfserr;
3435
3436 RESERVE_SPACE(24);
3437 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3438 WRITE32(sess->seqid);
3439 WRITE32(sess->flags);
3440 ADJUST_ARGS();
3441
3442 RESERVE_SPACE(28);
3443 WRITE32(0); /* headerpadsz */
3444 WRITE32(sess->fore_channel.maxreq_sz);
3445 WRITE32(sess->fore_channel.maxresp_sz);
3446 WRITE32(sess->fore_channel.maxresp_cached);
3447 WRITE32(sess->fore_channel.maxops);
3448 WRITE32(sess->fore_channel.maxreqs);
3449 WRITE32(sess->fore_channel.nr_rdma_attrs);
3450 ADJUST_ARGS();
3451
3452 if (sess->fore_channel.nr_rdma_attrs) {
3453 RESERVE_SPACE(4);
3454 WRITE32(sess->fore_channel.rdma_attrs);
3455 ADJUST_ARGS();
3456 }
3457
3458 RESERVE_SPACE(28);
3459 WRITE32(0); /* headerpadsz */
3460 WRITE32(sess->back_channel.maxreq_sz);
3461 WRITE32(sess->back_channel.maxresp_sz);
3462 WRITE32(sess->back_channel.maxresp_cached);
3463 WRITE32(sess->back_channel.maxops);
3464 WRITE32(sess->back_channel.maxreqs);
3465 WRITE32(sess->back_channel.nr_rdma_attrs);
3466 ADJUST_ARGS();
3467
3468 if (sess->back_channel.nr_rdma_attrs) {
3469 RESERVE_SPACE(4);
3470 WRITE32(sess->back_channel.rdma_attrs);
3471 ADJUST_ARGS();
3472 }
3473 return 0;
2db134eb
AA		 3474}
3475
3476static __be32
57b7b43b 3477nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3478 struct nfsd4_destroy_session *destroy_session)
3479{
2db134eb
AA		 3480 return nfserr;
3481}
3482
e1ca12df 3483static __be32
d1829b38 3484nfsd4_encode_free_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
e1ca12df
BS		 3485 struct nfsd4_free_stateid *free_stateid)
3486{
3487 __be32 *p;
3488
3489 if (nfserr)
3490 return nfserr;
3491
3492 RESERVE_SPACE(4);
d1829b38 3493 *p++ = nfserr;
e1ca12df
BS		 3494 ADJUST_ARGS();
3495 return nfserr;
3496}
3497
c47d832b 3498static __be32
57b7b43b 3499nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3500 struct nfsd4_sequence *seq)
3501{
bc749ca4 3502 __be32 *p;
b85d4c01
BH		 3503
3504 if (nfserr)
3505 return nfserr;
3506
3507 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
3508 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3509 WRITE32(seq->seqid);
3510 WRITE32(seq->slotid);
b7d7ca35
BF		 3511 /* Note slotid's are numbered from zero: */
3512 WRITE32(seq->maxslots - 1); /* sr_highest_slotid */
3513 WRITE32(seq->maxslots - 1); /* sr_target_highest_slotid */
0d7bb719 3514 WRITE32(seq->status_flags);
b85d4c01
BH		 3515
3516 ADJUST_ARGS();
557ce264 3517 resp->cstate.datap = p; /* DRC cache data pointer */
b85d4c01 3518 return 0;
2db134eb
AA		 3519}
3520
2355c596 3521static __be32
57b7b43b 3522nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
17456804
BS		 3523 struct nfsd4_test_stateid *test_stateid)
3524{
03cfb420 3525 struct nfsd4_test_stateid_id *stateid, *next;
17456804 3526 __be32 *p;
17456804 3527
03cfb420 3528 RESERVE_SPACE(4 + (4 * test_stateid->ts_num_ids));
17456804 3529 *p++ = htonl(test_stateid->ts_num_ids);
17456804 3530
03cfb420 3531 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
02f5fde5 3532 *p++ = stateid->ts_id_status;
17456804 3533 }
17456804 3534
03cfb420 3535 ADJUST_ARGS();
17456804
BS		 3536 return nfserr;
3537}
3538
695e12f8
BH		 3539static __be32
3540nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3541{
3542 return nfserr;
3543}
3544
3545typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3546
2db134eb
AA		 3547/*
3548 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3549 * since we don't need to filter out obsolete ops as this is
3550 * done in the decoding phase.
3551 */
695e12f8 3552static nfsd4_enc nfsd4_enc_ops[] = {
ad1060c8
BF		 3553 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3554 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3555 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3556 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3557 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3558 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3559 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3560 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3561 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3562 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3563 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3564 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3565 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3566 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3567 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3568 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
84f09f46 3569 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
ad1060c8
BF		 3570 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3571 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3572 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3573 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3574 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3575 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3576 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3577 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3578 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3579 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3580 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3581 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3582 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3583 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3584 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3585 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3586 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3587 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3588 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3589 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 3590
3591 /* NFSv4.1 operations */
3592 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
1d1bc8f2 3593 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
2db134eb
AA		 3594 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3595 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3596 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
e1ca12df 3597 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_free_stateid,
2db134eb
AA		 3598 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3599 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3600 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3601 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3602 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3603 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
22b6dee8 3604 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
2db134eb
AA		 3605 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3606 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
17456804 3607 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
2db134eb
AA		 3608 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3609 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3610 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
695e12f8
BH		 3611};
3612
496c262c
AA		 3613/*
3614 * Calculate the total amount of memory that the compound response has taken
58e7b33a 3615 * after encoding the current operation with pad.
496c262c 3616 *
58e7b33a
MJ		 3617 * pad: if operation is non-idempotent, pad was calculate by op_rsize_bop()
3618 * which was specified at nfsd4_operation, else pad is zero.
496c262c 3619 *
58e7b33a 3620 * Compare this length to the session se_fmaxresp_sz and se_fmaxresp_cached.
496c262c
AA		 3621 *
3622 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
3623 * will be at least a page and will therefore hold the xdr_buf head.
3624 */
57b7b43b 3625__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 pad)
496c262c 3626{
496c262c 3627 struct xdr_buf *xb = &resp->rqstp->rq_res;
496c262c
AA		 3628 struct nfsd4_session *session = NULL;
3629 struct nfsd4_slot *slot = resp->cstate.slot;
58e7b33a 3630 u32 length, tlen = 0;
496c262c
AA		 3631
3632 if (!nfsd4_has_session(&resp->cstate))
58e7b33a 3633 return 0;
496c262c
AA		 3634
3635 session = resp->cstate.session;
58e7b33a
MJ		 3636 if (session == NULL)
3637 return 0;
496c262c
AA		 3638
3639 if (xb->page_len == 0) {
3640 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad;
3641 } else {
3642 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
3643 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base;
3644
3645 length = xb->head[0].iov_len + xb->page_len + tlen + pad;
3646 }
3647 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
3648 length, xb->page_len, tlen, pad);
3649
58e7b33a
MJ		 3650 if (length > session->se_fchannel.maxresp_sz)
3651 return nfserr_rep_too_big;
3652
73e79482 3653 if ((slot->sl_flags & NFSD4_SLOT_CACHETHIS) &&
58e7b33a 3654 length > session->se_fchannel.maxresp_cached)
496c262c 3655 return nfserr_rep_too_big_to_cache;
58e7b33a
MJ		 3656
3657 return 0;
496c262c
AA		 3658}
3659
1da177e4
LT		 3660void
3661nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3662{
9411b1d4 3663 struct nfs4_stateowner *so = resp->cstate.replay_owner;
2ebbc012 3664 __be32 *statp;
bc749ca4 3665 __be32 *p;
1da177e4
LT		 3666
3667 RESERVE_SPACE(8);
3668 WRITE32(op->opnum);
3669 statp = p++; /* to be backfilled at the end */
3670 ADJUST_ARGS();
3671
695e12f8
BH		 3672 if (op->opnum == OP_ILLEGAL)
3673 goto status;
3674 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3675 !nfsd4_enc_ops[op->opnum]);
3676 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
496c262c 3677 /* nfsd4_check_drc_limit guarantees enough room for error status */
58e7b33a
MJ		 3678 if (!op->status)
3679 op->status = nfsd4_check_resp_size(resp, 0);
9411b1d4
BF		 3680 if (so) {
3681 so->so_replay.rp_status = op->status;
3682 so->so_replay.rp_buflen = (char *)resp->p - (char *)(statp+1);
3683 memcpy(so->so_replay.rp_buf, statp+1, so->so_replay.rp_buflen);
3684 }
695e12f8 3685status:
1da177e4
LT		 3686 /*
3687 * Note: We write the status directly, instead of using WRITE32(),
3688 * since it is already in network byte order.
3689 */
3690 *statp = op->status;
3691}
3692
3693/*
3694 * Encode the reply stored in the stateowner reply cache
3695 *
3696 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3697 * previously sent already encoded operation.
3698 *
3699 * called with nfs4_lock_state() held
3700 */
3701void
3702nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3703{
bc749ca4 3704 __be32 *p;
1da177e4
LT		 3705 struct nfs4_replay *rp = op->replay;
3706
3707 BUG_ON(!rp);
3708
3709 RESERVE_SPACE(8);
3710 WRITE32(op->opnum);
3711 *p++ = rp->rp_status; /* already xdr'ed */
3712 ADJUST_ARGS();
3713
3714 RESERVE_SPACE(rp->rp_buflen);
3715 WRITEMEM(rp->rp_buf, rp->rp_buflen);
3716 ADJUST_ARGS();
3717}
3718
1da177e4 3719int
2ebbc012 3720nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
1da177e4
LT		 3721{
3722 return xdr_ressize_check(rqstp, p);
3723}
3724
3e98abff 3725int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
1da177e4 3726{
3e98abff
BF		 3727 struct svc_rqst *rqstp = rq;
3728 struct nfsd4_compoundargs *args = rqstp->rq_argp;
3729
1da177e4
LT		 3730 if (args->ops != args->iops) {
3731 kfree(args->ops);
3732 args->ops = args->iops;
3733 }
f99d49ad
JJ		 3734 kfree(args->tmpp);
3735 args->tmpp = NULL;
1da177e4
LT		 3736 while (args->to_free) {
3737 struct tmpbuf *tb = args->to_free;
3738 args->to_free = tb->next;
3739 tb->release(tb->buf);
3740 kfree(tb);
3741 }
3e98abff 3742 return 1;
1da177e4
LT		 3743}
3744
3745int
2ebbc012 3746nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
1da177e4 3747{
1da177e4
LT		 3748 args->p = p;
3749 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3750 args->pagelist = rqstp->rq_arg.pages;
3751 args->pagelen = rqstp->rq_arg.page_len;
3752 args->tmpp = NULL;
3753 args->to_free = NULL;
3754 args->ops = args->iops;
3755 args->rqstp = rqstp;
3756
3e98abff 3757 return !nfsd4_decode_compound(args);
1da177e4
LT		 3758}
3759
3760int
2ebbc012 3761nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
1da177e4
LT		 3762{
3763 /*
3764 * All that remains is to write the tag and operation count...
3765 */
557ce264 3766 struct nfsd4_compound_state *cs = &resp->cstate;
1da177e4
LT		 3767 struct kvec *iov;
3768 p = resp->tagp;
3769 *p++ = htonl(resp->taglen);
3770 memcpy(p, resp->tag, resp->taglen);
3771 p += XDR_QUADLEN(resp->taglen);
3772 *p++ = htonl(resp->opcnt);
3773
3774 if (rqstp->rq_res.page_len)
3775 iov = &rqstp->rq_res.tail[0];
3776 else
3777 iov = &rqstp->rq_res.head[0];
3778 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3779 BUG_ON(iov->iov_len > PAGE_SIZE);
26c0c75e 3780 if (nfsd4_has_session(cs)) {
f0f51f5c
BF		 3781 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
3782 struct nfs4_client *clp = cs->session->se_client;
26c0c75e
BF		 3783 if (cs->status != nfserr_replay_cache) {
3784 nfsd4_store_cache_entry(resp);
73e79482 3785 cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE;
26c0c75e 3786 }
d7682988 3787 /* Renew the clientid on success and on replay */
f0f51f5c 3788 spin_lock(&nn->client_lock);
221a6876 3789 nfsd4_put_session(cs->session);
f0f51f5c
BF		 3790 spin_unlock(&nn->client_lock);
3791 put_client_renew(clp);
da3846a2 3792 }
1da177e4
LT		 3793 return 1;
3794}
3795
3796/*
3797 * Local variables:
3798 * c-basic-offset: 8
3799 * End:
3800 */
Linux kernel - Deliverables
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