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nfsd4: nfsd_shutdown_net needs state lock
[linux-2.6-block.git] / fs / nfsd / nfs4xdr.c
CommitLineData
1da177e4 1/*
1da177e4
LT		 2 * Server-side XDR for NFSv4
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 *
35 * TODO: Neil Brown made the following observation: We currently
36 * initially reserve NFSD_BUFSIZE space on the transmit queue and
37 * never release any of that until the request is complete.
38 * It would be good to calculate a new maximum response size while
39 * decoding the COMPOUND, and call svc_reserve with this number
40 * at the end of nfs4svc_decode_compoundargs.
41 */
42
5a0e3ad6 43#include <linux/slab.h>
1da177e4 44#include <linux/namei.h>
341eb184 45#include <linux/statfs.h>
0733d213 46#include <linux/utsname.h>
17456804 47#include <linux/pagemap.h>
4796f457 48#include <linux/sunrpc/svcauth_gss.h>
9a74af21 49
2ca72e17
BF		 50#include "idmap.h"
51#include "acl.h"
9a74af21 52#include "xdr4.h"
0a3adade 53#include "vfs.h"
17456804 54#include "state.h"
1091006c 55#include "cache.h"
3d733711 56#include "netns.h"
2ca72e17 57
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{
144 argp->pagelist++;
145 argp->p = page_address(argp->pagelist[0]);
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;
414 defer_free(argp, kfree, label->data);
415 memcpy(label->data, buf, dummy32);
416 }
417#endif
418
3c8e0316
YZ		 419 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
420 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
421 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
422 READ_BUF(expected_len - len);
423 else if (len != expected_len)
1da177e4
LT		 424 goto xdr_error;
425
426 DECODE_TAIL;
427
428out_nfserr:
b8dd7b9a 429 status = nfserrno(host_err);
1da177e4
LT		 430 goto out;
431}
432
e31a1b66
BH		 433static __be32
434nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
435{
436 DECODE_HEAD;
437
438 READ_BUF(sizeof(stateid_t));
439 READ32(sid->si_generation);
440 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
441
442 DECODE_TAIL;
443}
444
b37ad28b 445static __be32
1da177e4
LT		 446nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
447{
448 DECODE_HEAD;
449
450 READ_BUF(4);
451 READ32(access->ac_req_access);
452
453 DECODE_TAIL;
454}
455
acb2887e
BF		 456static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
457{
458 DECODE_HEAD;
12fc3e92 459 u32 dummy, uid, gid;
acb2887e
BF		 460 char *machine_name;
461 int i;
462 int nr_secflavs;
463
464 /* callback_sec_params4 */
465 READ_BUF(4);
466 READ32(nr_secflavs);
57569a70
BF		 467 if (nr_secflavs)
468 cbs->flavor = (u32)(-1);
469 else
470 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
471 cbs->flavor = 0;
acb2887e
BF		 472 for (i = 0; i < nr_secflavs; ++i) {
473 READ_BUF(4);
474 READ32(dummy);
475 switch (dummy) {
476 case RPC_AUTH_NULL:
477 /* Nothing to read */
12fc3e92
BF		 478 if (cbs->flavor == (u32)(-1))
479 cbs->flavor = RPC_AUTH_NULL;
acb2887e
BF		 480 break;
481 case RPC_AUTH_UNIX:
482 READ_BUF(8);
483 /* stamp */
484 READ32(dummy);
485
486 /* machine name */
487 READ32(dummy);
488 READ_BUF(dummy);
489 SAVEMEM(machine_name, dummy);
490
491 /* uid, gid */
492 READ_BUF(8);
12fc3e92
BF		 493 READ32(uid);
494 READ32(gid);
acb2887e
BF		 495
496 /* more gids */
497 READ_BUF(4);
498 READ32(dummy);
499 READ_BUF(dummy * 4);
12fc3e92 500 if (cbs->flavor == (u32)(-1)) {
03bc6d1c
EB		 501 kuid_t kuid = make_kuid(&init_user_ns, uid);
502 kgid_t kgid = make_kgid(&init_user_ns, gid);
503 if (uid_valid(kuid) && gid_valid(kgid)) {
504 cbs->uid = kuid;
505 cbs->gid = kgid;
506 cbs->flavor = RPC_AUTH_UNIX;
507 } else {
508 dprintk("RPC_AUTH_UNIX with invalid"
509 "uid or gid ignoring!\n");
510 }
12fc3e92 511 }
acb2887e
BF		 512 break;
513 case RPC_AUTH_GSS:
514 dprintk("RPC_AUTH_GSS callback secflavor "
515 "not supported!\n");
516 READ_BUF(8);
517 /* gcbp_service */
518 READ32(dummy);
519 /* gcbp_handle_from_server */
520 READ32(dummy);
521 READ_BUF(dummy);
522 p += XDR_QUADLEN(dummy);
523 /* gcbp_handle_from_client */
524 READ_BUF(4);
525 READ32(dummy);
526 READ_BUF(dummy);
527 break;
528 default:
529 dprintk("Illegal callback secflavor\n");
530 return nfserr_inval;
531 }
532 }
533 DECODE_TAIL;
534}
535
cb73a9f4
BF		 536static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
537{
538 DECODE_HEAD;
539
540 READ_BUF(4);
541 READ32(bc->bc_cb_program);
542 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
543
544 DECODE_TAIL;
545}
546
1d1bc8f2
BF		 547static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
548{
549 DECODE_HEAD;
1d1bc8f2
BF		 550
551 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
552 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
553 READ32(bcts->dir);
6ce2357f
BS		 554 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
555 * could help us figure out we should be using it. */
1d1bc8f2
BF		 556 DECODE_TAIL;
557}
558
b37ad28b 559static __be32
1da177e4
LT		 560nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
561{
562 DECODE_HEAD;
563
e31a1b66 564 READ_BUF(4);
1da177e4 565 READ32(close->cl_seqid);
e31a1b66 566 return nfsd4_decode_stateid(argp, &close->cl_stateid);
1da177e4
LT		 567
568 DECODE_TAIL;
569}
570
571
b37ad28b 572static __be32
1da177e4
LT		 573nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
574{
575 DECODE_HEAD;
576
577 READ_BUF(12);
578 READ64(commit->co_offset);
579 READ32(commit->co_count);
580
581 DECODE_TAIL;
582}
583
b37ad28b 584static __be32
1da177e4
LT		 585nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
586{
587 DECODE_HEAD;
588
589 READ_BUF(4);
590 READ32(create->cr_type);
591 switch (create->cr_type) {
592 case NF4LNK:
593 READ_BUF(4);
594 READ32(create->cr_linklen);
595 READ_BUF(create->cr_linklen);
596 SAVEMEM(create->cr_linkname, create->cr_linklen);
597 break;
598 case NF4BLK:
599 case NF4CHR:
600 READ_BUF(8);
601 READ32(create->cr_specdata1);
602 READ32(create->cr_specdata2);
603 break;
604 case NF4SOCK:
605 case NF4FIFO:
606 case NF4DIR:
607 default:
608 break;
609 }
610
611 READ_BUF(4);
612 READ32(create->cr_namelen);
613 READ_BUF(create->cr_namelen);
614 SAVEMEM(create->cr_name, create->cr_namelen);
a36b1725 615 if ((status = check_filename(create->cr_name, create->cr_namelen)))
1da177e4
LT		 616 return status;
617
3c8e0316 618 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
18032ca0 619 &create->cr_acl, &create->cr_label);
c0d6fc8a 620 if (status)
1da177e4
LT		 621 goto out;
622
623 DECODE_TAIL;
624}
625
b37ad28b 626static inline __be32
1da177e4
LT		 627nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
628{
e31a1b66 629 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
1da177e4
LT		 630}
631
b37ad28b 632static inline __be32
1da177e4
LT		 633nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
634{
635 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
636}
637
b37ad28b 638static __be32
1da177e4
LT		 639nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
640{
641 DECODE_HEAD;
642
643 READ_BUF(4);
644 READ32(link->li_namelen);
645 READ_BUF(link->li_namelen);
646 SAVEMEM(link->li_name, link->li_namelen);
a36b1725 647 if ((status = check_filename(link->li_name, link->li_namelen)))
1da177e4
LT		 648 return status;
649
650 DECODE_TAIL;
651}
652
b37ad28b 653static __be32
1da177e4
LT		 654nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
655{
656 DECODE_HEAD;
657
1da177e4
LT		 658 /*
659 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
660 */
661 READ_BUF(28);
662 READ32(lock->lk_type);
663 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
664 goto xdr_error;
665 READ32(lock->lk_reclaim);
666 READ64(lock->lk_offset);
667 READ64(lock->lk_length);
668 READ32(lock->lk_is_new);
669
670 if (lock->lk_is_new) {
e31a1b66 671 READ_BUF(4);
1da177e4 672 READ32(lock->lk_new_open_seqid);
e31a1b66
BH		 673 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
674 if (status)
675 return status;
676 READ_BUF(8 + sizeof(clientid_t));
1da177e4
LT		 677 READ32(lock->lk_new_lock_seqid);
678 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
679 READ32(lock->lk_new_owner.len);
680 READ_BUF(lock->lk_new_owner.len);
681 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
682 } else {
e31a1b66
BH		 683 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
684 if (status)
685 return status;
686 READ_BUF(4);
1da177e4
LT		 687 READ32(lock->lk_old_lock_seqid);
688 }
689
690 DECODE_TAIL;
691}
692
b37ad28b 693static __be32
1da177e4
LT		 694nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
695{
696 DECODE_HEAD;
697
698 READ_BUF(32);
699 READ32(lockt->lt_type);
700 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
701 goto xdr_error;
702 READ64(lockt->lt_offset);
703 READ64(lockt->lt_length);
704 COPYMEM(&lockt->lt_clientid, 8);
705 READ32(lockt->lt_owner.len);
706 READ_BUF(lockt->lt_owner.len);
707 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
708
709 DECODE_TAIL;
710}
711
b37ad28b 712static __be32
1da177e4
LT		 713nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
714{
715 DECODE_HEAD;
716
e31a1b66 717 READ_BUF(8);
1da177e4
LT		 718 READ32(locku->lu_type);
719 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
720 goto xdr_error;
721 READ32(locku->lu_seqid);
e31a1b66
BH		 722 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
723 if (status)
724 return status;
725 READ_BUF(16);
1da177e4
LT		 726 READ64(locku->lu_offset);
727 READ64(locku->lu_length);
728
729 DECODE_TAIL;
730}
731
b37ad28b 732static __be32
1da177e4
LT		 733nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
734{
735 DECODE_HEAD;
736
737 READ_BUF(4);
738 READ32(lookup->lo_len);
739 READ_BUF(lookup->lo_len);
740 SAVEMEM(lookup->lo_name, lookup->lo_len);
a36b1725 741 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
1da177e4
LT		 742 return status;
743
744 DECODE_TAIL;
745}
746
2c8bd7e0 747static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
04f9e664
BF		 748{
749 __be32 *p;
750 u32 w;
751
752 READ_BUF(4);
753 READ32(w);
2c8bd7e0
BH		 754 *share_access = w & NFS4_SHARE_ACCESS_MASK;
755 *deleg_want = w & NFS4_SHARE_WANT_MASK;
756 if (deleg_when)
757 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
758
04f9e664
BF		 759 switch (w & NFS4_SHARE_ACCESS_MASK) {
760 case NFS4_SHARE_ACCESS_READ:
761 case NFS4_SHARE_ACCESS_WRITE:
762 case NFS4_SHARE_ACCESS_BOTH:
763 break;
764 default:
765 return nfserr_bad_xdr;
766 }
fc0d14fe 767 w &= ~NFS4_SHARE_ACCESS_MASK;
04f9e664
BF		 768 if (!w)
769 return nfs_ok;
770 if (!argp->minorversion)
771 return nfserr_bad_xdr;
772 switch (w & NFS4_SHARE_WANT_MASK) {
773 case NFS4_SHARE_WANT_NO_PREFERENCE:
774 case NFS4_SHARE_WANT_READ_DELEG:
775 case NFS4_SHARE_WANT_WRITE_DELEG:
776 case NFS4_SHARE_WANT_ANY_DELEG:
777 case NFS4_SHARE_WANT_NO_DELEG:
778 case NFS4_SHARE_WANT_CANCEL:
779 break;
780 default:
781 return nfserr_bad_xdr;
782 }
92bac8c5 783 w &= ~NFS4_SHARE_WANT_MASK;
04f9e664
BF		 784 if (!w)
785 return nfs_ok;
2c8bd7e0
BH		 786
787 if (!deleg_when) /* open_downgrade */
788 return nfserr_inval;
04f9e664
BF		 789 switch (w) {
790 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
791 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
c668fc6d
BH		 792 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
793 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
04f9e664
BF		 794 return nfs_ok;
795 }
796xdr_error:
797 return nfserr_bad_xdr;
798}
799
800static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
801{
802 __be32 *p;
803
804 READ_BUF(4);
805 READ32(*x);
806 /* Note: unlinke access bits, deny bits may be zero. */
01cd4afa 807 if (*x & ~NFS4_SHARE_DENY_BOTH)
04f9e664
BF		 808 return nfserr_bad_xdr;
809 return nfs_ok;
810xdr_error:
811 return nfserr_bad_xdr;
812}
813
a084daf5
BF		 814static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
815{
816 __be32 *p;
817
818 READ_BUF(4);
819 READ32(o->len);
820
821 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
822 return nfserr_bad_xdr;
823
824 READ_BUF(o->len);
825 SAVEMEM(o->data, o->len);
826 return nfs_ok;
827xdr_error:
828 return nfserr_bad_xdr;
829}
830
b37ad28b 831static __be32
1da177e4
LT		 832nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
833{
834 DECODE_HEAD;
2c8bd7e0 835 u32 dummy;
1da177e4
LT		 836
837 memset(open->op_bmval, 0, sizeof(open->op_bmval));
838 open->op_iattr.ia_valid = 0;
fe0750e5 839 open->op_openowner = NULL;
1da177e4 840
9d313b17 841 open->op_xdr_error = 0;
1da177e4 842 /* seqid, share_access, share_deny, clientid, ownerlen */
04f9e664 843 READ_BUF(4);
1da177e4 844 READ32(open->op_seqid);
2c8bd7e0
BH		 845 /* decode, yet ignore deleg_when until supported */
846 status = nfsd4_decode_share_access(argp, &open->op_share_access,
847 &open->op_deleg_want, &dummy);
04f9e664
BF		 848 if (status)
849 goto xdr_error;
850 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
851 if (status)
852 goto xdr_error;
a084daf5 853 READ_BUF(sizeof(clientid_t));
1da177e4 854 COPYMEM(&open->op_clientid, sizeof(clientid_t));
a084daf5
BF		 855 status = nfsd4_decode_opaque(argp, &open->op_owner);
856 if (status)
857 goto xdr_error;
858 READ_BUF(4);
1da177e4
LT		 859 READ32(open->op_create);
860 switch (open->op_create) {
861 case NFS4_OPEN_NOCREATE:
862 break;
863 case NFS4_OPEN_CREATE:
864 READ_BUF(4);
865 READ32(open->op_createmode);
866 switch (open->op_createmode) {
867 case NFS4_CREATE_UNCHECKED:
868 case NFS4_CREATE_GUARDED:
c0d6fc8a 869 status = nfsd4_decode_fattr(argp, open->op_bmval,
18032ca0 870 &open->op_iattr, &open->op_acl, &open->op_label);
c0d6fc8a 871 if (status)
1da177e4
LT		 872 goto out;
873 break;
874 case NFS4_CREATE_EXCLUSIVE:
ab4684d1
CL		 875 READ_BUF(NFS4_VERIFIER_SIZE);
876 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 877 break;
79fb54ab
BH		 878 case NFS4_CREATE_EXCLUSIVE4_1:
879 if (argp->minorversion < 1)
880 goto xdr_error;
ab4684d1
CL		 881 READ_BUF(NFS4_VERIFIER_SIZE);
882 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
79fb54ab 883 status = nfsd4_decode_fattr(argp, open->op_bmval,
18032ca0 884 &open->op_iattr, &open->op_acl, &open->op_label);
79fb54ab
BH		 885 if (status)
886 goto out;
887 break;
1da177e4
LT		 888 default:
889 goto xdr_error;
890 }
891 break;
892 default:
893 goto xdr_error;
894 }
895
896 /* open_claim */
897 READ_BUF(4);
898 READ32(open->op_claim_type);
899 switch (open->op_claim_type) {
900 case NFS4_OPEN_CLAIM_NULL:
901 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
902 READ_BUF(4);
903 READ32(open->op_fname.len);
904 READ_BUF(open->op_fname.len);
905 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 906 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 907 return status;
908 break;
909 case NFS4_OPEN_CLAIM_PREVIOUS:
910 READ_BUF(4);
911 READ32(open->op_delegate_type);
912 break;
913 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
e31a1b66
BH		 914 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
915 if (status)
916 return status;
917 READ_BUF(4);
1da177e4
LT		 918 READ32(open->op_fname.len);
919 READ_BUF(open->op_fname.len);
920 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 921 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 922 return status;
923 break;
8b289b2c
BF		 924 case NFS4_OPEN_CLAIM_FH:
925 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
926 if (argp->minorversion < 1)
927 goto xdr_error;
928 /* void */
929 break;
930 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
931 if (argp->minorversion < 1)
932 goto xdr_error;
933 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
934 if (status)
935 return status;
936 break;
1da177e4
LT		 937 default:
938 goto xdr_error;
939 }
940
941 DECODE_TAIL;
942}
943
b37ad28b 944static __be32
1da177e4
LT		 945nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
946{
947 DECODE_HEAD;
e1a90ebd
AS		 948
949 if (argp->minorversion >= 1)
950 return nfserr_notsupp;
951
e31a1b66
BH		 952 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
953 if (status)
954 return status;
955 READ_BUF(4);
1da177e4 956 READ32(open_conf->oc_seqid);
e1a90ebd 957
1da177e4
LT		 958 DECODE_TAIL;
959}
960
b37ad28b 961static __be32
1da177e4
LT		 962nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
963{
964 DECODE_HEAD;
965
e31a1b66
BH		 966 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
967 if (status)
968 return status;
04f9e664 969 READ_BUF(4);
1da177e4 970 READ32(open_down->od_seqid);
2c8bd7e0
BH		 971 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
972 &open_down->od_deleg_want, NULL);
04f9e664
BF		 973 if (status)
974 return status;
975 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
976 if (status)
977 return status;
1da177e4
LT		 978 DECODE_TAIL;
979}
980
b37ad28b 981static __be32
1da177e4
LT		 982nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
983{
984 DECODE_HEAD;
985
986 READ_BUF(4);
987 READ32(putfh->pf_fhlen);
988 if (putfh->pf_fhlen > NFS4_FHSIZE)
989 goto xdr_error;
990 READ_BUF(putfh->pf_fhlen);
991 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
992
993 DECODE_TAIL;
994}
995
e1a90ebd
AS		 996static __be32
997nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
998{
999 if (argp->minorversion == 0)
1000 return nfs_ok;
1001 return nfserr_notsupp;
1002}
1003
b37ad28b 1004static __be32
1da177e4
LT		 1005nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1006{
1007 DECODE_HEAD;
1008
e31a1b66
BH		 1009 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
1010 if (status)
1011 return status;
1012 READ_BUF(12);
1da177e4
LT		 1013 READ64(read->rd_offset);
1014 READ32(read->rd_length);
1015
1016 DECODE_TAIL;
1017}
1018
b37ad28b 1019static __be32
1da177e4
LT		 1020nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1021{
1022 DECODE_HEAD;
1023
1024 READ_BUF(24);
1025 READ64(readdir->rd_cookie);
1026 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
1027 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
1028 READ32(readdir->rd_maxcount);
1029 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
1030 goto out;
1031
1032 DECODE_TAIL;
1033}
1034
b37ad28b 1035static __be32
1da177e4
LT		 1036nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1037{
1038 DECODE_HEAD;
1039
1040 READ_BUF(4);
1041 READ32(remove->rm_namelen);
1042 READ_BUF(remove->rm_namelen);
1043 SAVEMEM(remove->rm_name, remove->rm_namelen);
a36b1725 1044 if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
1da177e4
LT		 1045 return status;
1046
1047 DECODE_TAIL;
1048}
1049
b37ad28b 1050static __be32
1da177e4
LT		 1051nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1052{
1053 DECODE_HEAD;
1054
1055 READ_BUF(4);
1056 READ32(rename->rn_snamelen);
1057 READ_BUF(rename->rn_snamelen + 4);
1058 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
1059 READ32(rename->rn_tnamelen);
1060 READ_BUF(rename->rn_tnamelen);
1061 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
a36b1725 1062 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
1da177e4 1063 return status;
a36b1725 1064 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
1da177e4
LT		 1065 return status;
1066
1067 DECODE_TAIL;
1068}
1069
b37ad28b 1070static __be32
1da177e4
LT		 1071nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1072{
1073 DECODE_HEAD;
1074
e1a90ebd
AS		 1075 if (argp->minorversion >= 1)
1076 return nfserr_notsupp;
1077
1da177e4
LT		 1078 READ_BUF(sizeof(clientid_t));
1079 COPYMEM(clientid, sizeof(clientid_t));
1080
1081 DECODE_TAIL;
1082}
1083
dcb488a3
AA		 1084static __be32
1085nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1086 struct nfsd4_secinfo *secinfo)
1087{
1088 DECODE_HEAD;
1089
1090 READ_BUF(4);
1091 READ32(secinfo->si_namelen);
1092 READ_BUF(secinfo->si_namelen);
1093 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
a36b1725 1094 status = check_filename(secinfo->si_name, secinfo->si_namelen);
dcb488a3
AA		 1095 if (status)
1096 return status;
1097 DECODE_TAIL;
1098}
1099
04f4ad16
BF		 1100static __be32
1101nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1102 struct nfsd4_secinfo_no_name *sin)
1103{
1104 DECODE_HEAD;
1105
1106 READ_BUF(4);
1107 READ32(sin->sin_style);
1108 DECODE_TAIL;
1109}
1110
b37ad28b 1111static __be32
1da177e4
LT		 1112nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1113{
e31a1b66 1114 __be32 status;
1da177e4 1115
e31a1b66
BH		 1116 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1117 if (status)
1118 return status;
3c8e0316 1119 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
18032ca0 1120 &setattr->sa_acl, &setattr->sa_label);
1da177e4
LT		 1121}
1122
b37ad28b 1123static __be32
1da177e4
LT		 1124nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1125{
1126 DECODE_HEAD;
1127
e1a90ebd
AS		 1128 if (argp->minorversion >= 1)
1129 return nfserr_notsupp;
1130
ab4684d1
CL		 1131 READ_BUF(NFS4_VERIFIER_SIZE);
1132 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 1133
a084daf5
BF		 1134 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1135 if (status)
1136 return nfserr_bad_xdr;
1137 READ_BUF(8);
1da177e4
LT		 1138 READ32(setclientid->se_callback_prog);
1139 READ32(setclientid->se_callback_netid_len);
1140
1141 READ_BUF(setclientid->se_callback_netid_len + 4);
1142 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
1143 READ32(setclientid->se_callback_addr_len);
1144
1145 READ_BUF(setclientid->se_callback_addr_len + 4);
1146 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
1147 READ32(setclientid->se_callback_ident);
1148
1149 DECODE_TAIL;
1150}
1151
b37ad28b 1152static __be32
1da177e4
LT		 1153nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1154{
1155 DECODE_HEAD;
1156
e1a90ebd
AS		 1157 if (argp->minorversion >= 1)
1158 return nfserr_notsupp;
1159
ab4684d1 1160 READ_BUF(8 + NFS4_VERIFIER_SIZE);
1da177e4 1161 COPYMEM(&scd_c->sc_clientid, 8);
ab4684d1 1162 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
1da177e4
LT		 1163
1164 DECODE_TAIL;
1165}
1166
1167/* Also used for NVERIFY */
b37ad28b 1168static __be32
1da177e4
LT		 1169nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1170{
1da177e4
LT		 1171 DECODE_HEAD;
1172
1173 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1174 goto out;
1175
1176 /* For convenience's sake, we compare raw xdr'd attributes in
e5f95703
BF		 1177 * nfsd4_proc_verify */
1178
1da177e4
LT		 1179 READ_BUF(4);
1180 READ32(verify->ve_attrlen);
1181 READ_BUF(verify->ve_attrlen);
1182 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1183
1184 DECODE_TAIL;
1185}
1186
b37ad28b 1187static __be32
1da177e4
LT		 1188nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1189{
1190 int avail;
1da177e4
LT		 1191 int len;
1192 DECODE_HEAD;
1193
e31a1b66
BH		 1194 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1195 if (status)
1196 return status;
1197 READ_BUF(16);
1da177e4
LT		 1198 READ64(write->wr_offset);
1199 READ32(write->wr_stable_how);
1200 if (write->wr_stable_how > 2)
1201 goto xdr_error;
1202 READ32(write->wr_buflen);
1203
1204 /* Sorry .. no magic macros for this.. *
1205 * READ_BUF(write->wr_buflen);
1206 * SAVEMEM(write->wr_buf, write->wr_buflen);
1207 */
1208 avail = (char*)argp->end - (char*)argp->p;
1209 if (avail + argp->pagelen < write->wr_buflen) {
817cb9d4
CL		 1210 dprintk("NFSD: xdr error (%s:%d)\n",
1211 __FILE__, __LINE__);
1da177e4
LT		 1212 goto xdr_error;
1213 }
70cc7f75
BF		 1214 write->wr_head.iov_base = p;
1215 write->wr_head.iov_len = avail;
5a80a54d 1216 WARN_ON(avail != (XDR_QUADLEN(avail) << 2));
70cc7f75 1217 write->wr_pagelist = argp->pagelist;
5a80a54d
BF		 1218
1219 len = XDR_QUADLEN(write->wr_buflen) << 2;
1220 if (len >= avail) {
1221 int pages;
1222
1223 len -= avail;
1224
1225 pages = len >> PAGE_SHIFT;
1226 argp->pagelist += pages;
1227 argp->pagelen -= pages * PAGE_SIZE;
1228 len -= pages * PAGE_SIZE;
1229
1230 argp->p = (__be32 *)page_address(argp->pagelist[0]);
1231 argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE);
1da177e4 1232 }
5a80a54d 1233 argp->p += XDR_QUADLEN(len);
1da177e4
LT		 1234
1235 DECODE_TAIL;
1236}
1237
b37ad28b 1238static __be32
1da177e4
LT		 1239nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1240{
1241 DECODE_HEAD;
1242
e1a90ebd
AS		 1243 if (argp->minorversion >= 1)
1244 return nfserr_notsupp;
1245
1da177e4
LT		 1246 READ_BUF(12);
1247 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1248 READ32(rlockowner->rl_owner.len);
1249 READ_BUF(rlockowner->rl_owner.len);
1250 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1251
60adfc50
AA		 1252 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1253 return nfserr_inval;
1da177e4
LT		 1254 DECODE_TAIL;
1255}
1256
2db134eb
AA		 1257static __be32
1258nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
0733d213 1259 struct nfsd4_exchange_id *exid)
2db134eb 1260{
5afa040b 1261 int dummy, tmp;
0733d213
AA		 1262 DECODE_HEAD;
1263
1264 READ_BUF(NFS4_VERIFIER_SIZE);
1265 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1266
a084daf5
BF		 1267 status = nfsd4_decode_opaque(argp, &exid->clname);
1268 if (status)
1269 return nfserr_bad_xdr;
0733d213
AA		 1270
1271 READ_BUF(4);
1272 READ32(exid->flags);
1273
1274 /* Ignore state_protect4_a */
1275 READ_BUF(4);
1276 READ32(exid->spa_how);
1277 switch (exid->spa_how) {
1278 case SP4_NONE:
1279 break;
1280 case SP4_MACH_CRED:
1281 /* spo_must_enforce */
1282 READ_BUF(4);
1283 READ32(dummy);
1284 READ_BUF(dummy * 4);
1285 p += dummy;
1286
1287 /* spo_must_allow */
1288 READ_BUF(4);
1289 READ32(dummy);
1290 READ_BUF(dummy * 4);
1291 p += dummy;
1292 break;
1293 case SP4_SSV:
1294 /* ssp_ops */
1295 READ_BUF(4);
1296 READ32(dummy);
1297 READ_BUF(dummy * 4);
1298 p += dummy;
1299
1300 READ_BUF(4);
1301 READ32(dummy);
1302 READ_BUF(dummy * 4);
1303 p += dummy;
1304
1305 /* ssp_hash_algs<> */
1306 READ_BUF(4);
5afa040b
MJ		 1307 READ32(tmp);
1308 while (tmp--) {
1309 READ_BUF(4);
1310 READ32(dummy);
1311 READ_BUF(dummy);
1312 p += XDR_QUADLEN(dummy);
1313 }
0733d213
AA		 1314
1315 /* ssp_encr_algs<> */
1316 READ_BUF(4);
5afa040b
MJ		 1317 READ32(tmp);
1318 while (tmp--) {
1319 READ_BUF(4);
1320 READ32(dummy);
1321 READ_BUF(dummy);
1322 p += XDR_QUADLEN(dummy);
1323 }
0733d213
AA		 1324
1325 /* ssp_window and ssp_num_gss_handles */
1326 READ_BUF(8);
1327 READ32(dummy);
1328 READ32(dummy);
1329 break;
1330 default:
1331 goto xdr_error;
1332 }
1333
1334 /* Ignore Implementation ID */
1335 READ_BUF(4); /* nfs_impl_id4 array length */
1336 READ32(dummy);
1337
1338 if (dummy > 1)
1339 goto xdr_error;
1340
1341 if (dummy == 1) {
1342 /* nii_domain */
1343 READ_BUF(4);
1344 READ32(dummy);
1345 READ_BUF(dummy);
1346 p += XDR_QUADLEN(dummy);
1347
1348 /* nii_name */
1349 READ_BUF(4);
1350 READ32(dummy);
1351 READ_BUF(dummy);
1352 p += XDR_QUADLEN(dummy);
1353
1354 /* nii_date */
1355 READ_BUF(12);
1356 p += 3;
1357 }
1358 DECODE_TAIL;
2db134eb
AA		 1359}
1360
1361static __be32
1362nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1363 struct nfsd4_create_session *sess)
1364{
ec6b5d7b 1365 DECODE_HEAD;
ec6b5d7b 1366 u32 dummy;
ec6b5d7b
AA		 1367
1368 READ_BUF(16);
1369 COPYMEM(&sess->clientid, 8);
1370 READ32(sess->seqid);
1371 READ32(sess->flags);
1372
1373 /* Fore channel attrs */
1374 READ_BUF(28);
1375 READ32(dummy); /* headerpadsz is always 0 */
1376 READ32(sess->fore_channel.maxreq_sz);
1377 READ32(sess->fore_channel.maxresp_sz);
1378 READ32(sess->fore_channel.maxresp_cached);
1379 READ32(sess->fore_channel.maxops);
1380 READ32(sess->fore_channel.maxreqs);
1381 READ32(sess->fore_channel.nr_rdma_attrs);
1382 if (sess->fore_channel.nr_rdma_attrs == 1) {
1383 READ_BUF(4);
1384 READ32(sess->fore_channel.rdma_attrs);
1385 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1386 dprintk("Too many fore channel attr bitmaps!\n");
1387 goto xdr_error;
1388 }
1389
1390 /* Back channel attrs */
1391 READ_BUF(28);
1392 READ32(dummy); /* headerpadsz is always 0 */
1393 READ32(sess->back_channel.maxreq_sz);
1394 READ32(sess->back_channel.maxresp_sz);
1395 READ32(sess->back_channel.maxresp_cached);
1396 READ32(sess->back_channel.maxops);
1397 READ32(sess->back_channel.maxreqs);
1398 READ32(sess->back_channel.nr_rdma_attrs);
1399 if (sess->back_channel.nr_rdma_attrs == 1) {
1400 READ_BUF(4);
1401 READ32(sess->back_channel.rdma_attrs);
1402 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1403 dprintk("Too many back channel attr bitmaps!\n");
1404 goto xdr_error;
1405 }
1406
acb2887e 1407 READ_BUF(4);
ec6b5d7b 1408 READ32(sess->callback_prog);
acb2887e 1409 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
ec6b5d7b 1410 DECODE_TAIL;
2db134eb
AA		 1411}
1412
1413static __be32
1414nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1415 struct nfsd4_destroy_session *destroy_session)
1416{
e10e0cfc
BH		 1417 DECODE_HEAD;
1418 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1419 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1420
1421 DECODE_TAIL;
2db134eb
AA		 1422}
1423
e1ca12df
BS		 1424static __be32
1425nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1426 struct nfsd4_free_stateid *free_stateid)
1427{
1428 DECODE_HEAD;
1429
1430 READ_BUF(sizeof(stateid_t));
1431 READ32(free_stateid->fr_stateid.si_generation);
1432 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1433
1434 DECODE_TAIL;
1435}
1436
2db134eb
AA		 1437static __be32
1438nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1439 struct nfsd4_sequence *seq)
1440{
b85d4c01
BH		 1441 DECODE_HEAD;
1442
1443 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1444 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1445 READ32(seq->seqid);
1446 READ32(seq->slotid);
1447 READ32(seq->maxslots);
1448 READ32(seq->cachethis);
1449
1450 DECODE_TAIL;
2db134eb
AA		 1451}
1452
17456804
BS		 1453static __be32
1454nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1455{
17456804 1456 int i;
03cfb420
BS		 1457 __be32 *p, status;
1458 struct nfsd4_test_stateid_id *stateid;
17456804
BS		 1459
1460 READ_BUF(4);
1461 test_stateid->ts_num_ids = ntohl(*p++);
1462
03cfb420 1463 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
17456804
BS		 1464
1465 for (i = 0; i < test_stateid->ts_num_ids; i++) {
03cfb420
BS		 1466 stateid = kmalloc(sizeof(struct nfsd4_test_stateid_id), GFP_KERNEL);
1467 if (!stateid) {
afcf6792 1468 status = nfserrno(-ENOMEM);
03cfb420
BS		 1469 goto out;
1470 }
1471
1472 defer_free(argp, kfree, stateid);
1473 INIT_LIST_HEAD(&stateid->ts_id_list);
1474 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1475
1476 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
17456804 1477 if (status)
03cfb420 1478 goto out;
17456804
BS		 1479 }
1480
1481 status = 0;
1482out:
1483 return status;
1484xdr_error:
1485 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1486 status = nfserr_bad_xdr;
1487 goto out;
1488}
1489
345c2842
MJ		 1490static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1491{
1492 DECODE_HEAD;
1493
1494 READ_BUF(8);
1495 COPYMEM(&dc->clientid, 8);
1496
1497 DECODE_TAIL;
1498}
1499
4dc6ec00
BF		 1500static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1501{
1502 DECODE_HEAD;
1503
1504 READ_BUF(4);
1505 READ32(rc->rca_one_fs);
1506
1507 DECODE_TAIL;
1508}
1509
347e0ad9
BH		 1510static __be32
1511nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1512{
1513 return nfs_ok;
1514}
1515
3c375c6f
BH		 1516static __be32
1517nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1518{
1e685ec2 1519 return nfserr_notsupp;
3c375c6f
BH		 1520}
1521
347e0ad9
BH		 1522typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1523
1524static nfsd4_dec nfsd4_dec_ops[] = {
ad1060c8
BF		 1525 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1526 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1527 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1528 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1529 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1530 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1531 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1532 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1533 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1534 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1535 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1536 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1537 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1538 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1539 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1540 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1541 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1542 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1543 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1544 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
e1a90ebd 1545 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
ad1060c8
BF		 1546 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1547 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1548 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1549 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1550 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1551 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1552 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1553 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1554 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1555 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1556 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1557 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1558 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1559 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1560 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1561 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
2db134eb
AA		 1562
1563 /* new operations for NFSv4.1 */
cb73a9f4 1564 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1d1bc8f2 1565 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
9064caae
RD		 1566 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1567 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1568 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
e1ca12df 1569 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
9064caae
RD		 1570 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1571 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1572 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1573 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1574 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1575 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
04f4ad16 1576 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
9064caae
RD		 1577 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1578 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
17456804 1579 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
9064caae 1580 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
345c2842 1581 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
4dc6ec00 1582 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
2db134eb
AA		 1583};
1584
e1a90ebd
AS		 1585static inline bool
1586nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
1587{
1588 if (op->opnum < FIRST_NFS4_OP || op->opnum > LAST_NFS4_OP)
1589 return false;
1590 else if (argp->minorversion == 0 && op->opnum > OP_RELEASE_LOCKOWNER)
1591 return false;
1592 else if (argp->minorversion == 1 && op->opnum > OP_RECLAIM_COMPLETE)
1593 return false;
1594 return true;
1595}
f2feb96b 1596
b37ad28b 1597static __be32
1da177e4
LT		 1598nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1599{
1600 DECODE_HEAD;
1601 struct nfsd4_op *op;
1091006c 1602 bool cachethis = false;
1da177e4
LT		 1603 int i;
1604
1da177e4
LT		 1605 READ_BUF(4);
1606 READ32(argp->taglen);
1607 READ_BUF(argp->taglen + 8);
1608 SAVEMEM(argp->tag, argp->taglen);
1609 READ32(argp->minorversion);
1610 READ32(argp->opcnt);
1611
1612 if (argp->taglen > NFSD4_MAX_TAGLEN)
1613 goto xdr_error;
1614 if (argp->opcnt > 100)
1615 goto xdr_error;
1616
e8c96f8c 1617 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1da177e4
LT		 1618 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1619 if (!argp->ops) {
1620 argp->ops = argp->iops;
817cb9d4 1621 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1da177e4
LT		 1622 goto xdr_error;
1623 }
1624 }
1625
e1a90ebd 1626 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
30cff1ff
BH		 1627 argp->opcnt = 0;
1628
1da177e4
LT		 1629 for (i = 0; i < argp->opcnt; i++) {
1630 op = &argp->ops[i];
1631 op->replay = NULL;
1632
8a61b18c
BF		 1633 READ_BUF(4);
1634 READ32(op->opnum);
1da177e4 1635
e1a90ebd
AS		 1636 if (nfsd4_opnum_in_range(argp, op))
1637 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
347e0ad9 1638 else {
1da177e4
LT		 1639 op->opnum = OP_ILLEGAL;
1640 op->status = nfserr_op_illegal;
1da177e4
LT		 1641 }
1642
1643 if (op->status) {
1644 argp->opcnt = i+1;
1645 break;
1646 }
1091006c
BF		 1647 /*
1648 * We'll try to cache the result in the DRC if any one
1649 * op in the compound wants to be cached:
1650 */
1651 cachethis |= nfsd4_cache_this_op(op);
1da177e4 1652 }
1091006c
BF		 1653 /* Sessions make the DRC unnecessary: */
1654 if (argp->minorversion)
1655 cachethis = false;
1656 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1da177e4
LT		 1657
1658 DECODE_TAIL;
1659}
1da177e4 1660
1da177e4
LT		 1661#define WRITE32(n) *p++ = htonl(n)
1662#define WRITE64(n) do { \
1663 *p++ = htonl((u32)((n) >> 32)); \
1664 *p++ = htonl((u32)(n)); \
1665} while (0)
5108b276 1666#define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1da177e4
LT		 1667 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1668 memcpy(p, ptr, nbytes); \
1669 p += XDR_QUADLEN(nbytes); \
5108b276 1670}} while (0)
c654b8a9
BF		 1671
1672static void write32(__be32 **p, u32 n)
1673{
45eaa1c1 1674 *(*p)++ = htonl(n);
c654b8a9
BF		 1675}
1676
1677static void write64(__be32 **p, u64 n)
1678{
45eaa1c1 1679 write32(p, (n >> 32));
c654b8a9
BF		 1680 write32(p, (u32)n);
1681}
1682
1683static void write_change(__be32 **p, struct kstat *stat, struct inode *inode)
1684{
1685 if (IS_I_VERSION(inode)) {
1686 write64(p, inode->i_version);
1687 } else {
1688 write32(p, stat->ctime.tv_sec);
1689 write32(p, stat->ctime.tv_nsec);
1690 }
1691}
1692
1693static void write_cinfo(__be32 **p, struct nfsd4_change_info *c)
1694{
1695 write32(p, c->atomic);
1696 if (c->change_supported) {
1697 write64(p, c->before_change);
1698 write64(p, c->after_change);
1699 } else {
1700 write32(p, c->before_ctime_sec);
1701 write32(p, c->before_ctime_nsec);
1702 write32(p, c->after_ctime_sec);
1703 write32(p, c->after_ctime_nsec);
1704 }
1705}
1da177e4
LT		 1706
1707#define RESERVE_SPACE(nbytes) do { \
1708 p = resp->p; \
1709 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1710} while (0)
1711#define ADJUST_ARGS() resp->p = p
1712
81c3f413 1713/* Encode as an array of strings the string given with components
e7a0444a 1714 * separated @sep, escaped with esc_enter and esc_exit.
81c3f413 1715 */
e7a0444a
WAA		 1716static __be32 nfsd4_encode_components_esc(char sep, char *components,
1717 __be32 **pp, int *buflen,
1718 char esc_enter, char esc_exit)
81c3f413 1719{
2ebbc012
AV		 1720 __be32 *p = *pp;
1721 __be32 *countp = p;
81c3f413 1722 int strlen, count=0;
e7a0444a 1723 char *str, *end, *next;
81c3f413
BF		 1724
1725 dprintk("nfsd4_encode_components(%s)\n", components);
1726 if ((*buflen -= 4) < 0)
1727 return nfserr_resource;
1728 WRITE32(0); /* We will fill this in with @count later */
1729 end = str = components;
1730 while (*end) {
e7a0444a
WAA		 1731 bool found_esc = false;
1732
1733 /* try to parse as esc_start, ..., esc_end, sep */
1734 if (*str == esc_enter) {
1735 for (; *end && (*end != esc_exit); end++)
1736 /* find esc_exit or end of string */;
1737 next = end + 1;
1738 if (*end && (!*next || *next == sep)) {
1739 str++;
1740 found_esc = true;
1741 }
1742 }
1743
1744 if (!found_esc)
1745 for (; *end && (*end != sep); end++)
1746 /* find sep or end of string */;
1747
81c3f413
BF		 1748 strlen = end - str;
1749 if (strlen) {
1750 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1751 return nfserr_resource;
1752 WRITE32(strlen);
1753 WRITEMEM(str, strlen);
1754 count++;
1755 }
1756 else
1757 end++;
1758 str = end;
1759 }
1760 *pp = p;
1761 p = countp;
1762 WRITE32(count);
1763 return 0;
1764}
1765
e7a0444a
WAA		 1766/* Encode as an array of strings the string given with components
1767 * separated @sep.
1768 */
1769static __be32 nfsd4_encode_components(char sep, char *components,
1770 __be32 **pp, int *buflen)
1771{
1772 return nfsd4_encode_components_esc(sep, components, pp, buflen, 0, 0);
1773}
1774
81c3f413
BF		 1775/*
1776 * encode a location element of a fs_locations structure
1777 */
b37ad28b 1778static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
2ebbc012 1779 __be32 **pp, int *buflen)
81c3f413 1780{
b37ad28b 1781 __be32 status;
2ebbc012 1782 __be32 *p = *pp;
81c3f413 1783
e7a0444a
WAA		 1784 status = nfsd4_encode_components_esc(':', location->hosts, &p, buflen,
1785 '[', ']');
81c3f413
BF		 1786 if (status)
1787 return status;
1788 status = nfsd4_encode_components('/', location->path, &p, buflen);
1789 if (status)
1790 return status;
1791 *pp = p;
1792 return 0;
1793}
1794
1795/*
ed748aac 1796 * Encode a path in RFC3530 'pathname4' format
81c3f413 1797 */
ed748aac
TM		 1798static __be32 nfsd4_encode_path(const struct path *root,
1799 const struct path *path, __be32 **pp, int *buflen)
81c3f413 1800{
301f0268 1801 struct path cur = *path;
ed748aac
TM		 1802 __be32 *p = *pp;
1803 struct dentry **components = NULL;
1804 unsigned int ncomponents = 0;
1805 __be32 err = nfserr_jukebox;
81c3f413 1806
ed748aac 1807 dprintk("nfsd4_encode_components(");
81c3f413 1808
ed748aac
TM		 1809 path_get(&cur);
1810 /* First walk the path up to the nfsd root, and store the
1811 * dentries/path components in an array.
1812 */
1813 for (;;) {
1814 if (cur.dentry == root->dentry && cur.mnt == root->mnt)
1815 break;
1816 if (cur.dentry == cur.mnt->mnt_root) {
1817 if (follow_up(&cur))
1818 continue;
1819 goto out_free;
1820 }
1821 if ((ncomponents & 15) == 0) {
1822 struct dentry **new;
1823 new = krealloc(components,
1824 sizeof(*new) * (ncomponents + 16),
1825 GFP_KERNEL);
1826 if (!new)
1827 goto out_free;
1828 components = new;
1829 }
1830 components[ncomponents++] = cur.dentry;
1831 cur.dentry = dget_parent(cur.dentry);
1832 }
81c3f413 1833
ed748aac
TM		 1834 *buflen -= 4;
1835 if (*buflen < 0)
1836 goto out_free;
1837 WRITE32(ncomponents);
1838
1839 while (ncomponents) {
1840 struct dentry *dentry = components[ncomponents - 1];
301f0268 1841 unsigned int len;
ed748aac 1842
301f0268
AV		 1843 spin_lock(&dentry->d_lock);
1844 len = dentry->d_name.len;
ed748aac 1845 *buflen -= 4 + (XDR_QUADLEN(len) << 2);
301f0268
AV		 1846 if (*buflen < 0) {
1847 spin_unlock(&dentry->d_lock);
ed748aac 1848 goto out_free;
301f0268 1849 }
ed748aac
TM		 1850 WRITE32(len);
1851 WRITEMEM(dentry->d_name.name, len);
1852 dprintk("/%s", dentry->d_name.name);
301f0268 1853 spin_unlock(&dentry->d_lock);
ed748aac
TM		 1854 dput(dentry);
1855 ncomponents--;
81c3f413 1856 }
ed748aac
TM		 1857
1858 *pp = p;
1859 err = 0;
1860out_free:
1861 dprintk(")\n");
1862 while (ncomponents)
1863 dput(components[--ncomponents]);
1864 kfree(components);
1865 path_put(&cur);
1866 return err;
1867}
1868
1869static __be32 nfsd4_encode_fsloc_fsroot(struct svc_rqst *rqstp,
1870 const struct path *path, __be32 **pp, int *buflen)
1871{
1872 struct svc_export *exp_ps;
1873 __be32 res;
1874
1875 exp_ps = rqst_find_fsidzero_export(rqstp);
1876 if (IS_ERR(exp_ps))
1877 return nfserrno(PTR_ERR(exp_ps));
1878 res = nfsd4_encode_path(&exp_ps->ex_path, path, pp, buflen);
1879 exp_put(exp_ps);
1880 return res;
81c3f413
BF		 1881}
1882
1883/*
1884 * encode a fs_locations structure
1885 */
b37ad28b 1886static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
81c3f413 1887 struct svc_export *exp,
2ebbc012 1888 __be32 **pp, int *buflen)
81c3f413 1889{
b37ad28b 1890 __be32 status;
cc45f017 1891 int i;
2ebbc012 1892 __be32 *p = *pp;
81c3f413 1893 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
81c3f413 1894
ed748aac 1895 status = nfsd4_encode_fsloc_fsroot(rqstp, &exp->ex_path, &p, buflen);
81c3f413
BF		 1896 if (status)
1897 return status;
1898 if ((*buflen -= 4) < 0)
1899 return nfserr_resource;
1900 WRITE32(fslocs->locations_count);
1901 for (i=0; i<fslocs->locations_count; i++) {
1902 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1903 &p, buflen);
1904 if (status)
1905 return status;
1906 }
1907 *pp = p;
1908 return 0;
1909}
1da177e4 1910
3d2544b1
BF		 1911static u32 nfs4_file_type(umode_t mode)
1912{
1913 switch (mode & S_IFMT) {
1914 case S_IFIFO: return NF4FIFO;
1915 case S_IFCHR: return NF4CHR;
1916 case S_IFDIR: return NF4DIR;
1917 case S_IFBLK: return NF4BLK;
1918 case S_IFLNK: return NF4LNK;
1919 case S_IFREG: return NF4REG;
1920 case S_IFSOCK: return NF4SOCK;
1921 default: return NF4BAD;
1922 };
1923}
1da177e4 1924
b37ad28b 1925static __be32
ab8e4aee 1926nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, kuid_t uid, kgid_t gid,
2ebbc012 1927 __be32 **p, int *buflen)
1da177e4
LT		 1928{
1929 int status;
1930
1931 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1932 return nfserr_resource;
1933 if (whotype != NFS4_ACL_WHO_NAMED)
1934 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
ab8e4aee
EB		 1935 else if (gid_valid(gid))
1936 status = nfsd_map_gid_to_name(rqstp, gid, (u8 *)(*p + 1));
1da177e4 1937 else
ab8e4aee 1938 status = nfsd_map_uid_to_name(rqstp, uid, (u8 *)(*p + 1));
1da177e4
LT		 1939 if (status < 0)
1940 return nfserrno(status);
1941 *p = xdr_encode_opaque(*p, NULL, status);
1942 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1943 BUG_ON(*buflen < 0);
1944 return 0;
1945}
1946
b37ad28b 1947static inline __be32
ab8e4aee 1948nfsd4_encode_user(struct svc_rqst *rqstp, kuid_t user, __be32 **p, int *buflen)
1da177e4 1949{
ab8e4aee
EB		 1950 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, user, INVALID_GID,
1951 p, buflen);
1da177e4
LT		 1952}
1953
b37ad28b 1954static inline __be32
ab8e4aee 1955nfsd4_encode_group(struct svc_rqst *rqstp, kgid_t group, __be32 **p, int *buflen)
1da177e4 1956{
ab8e4aee
EB		 1957 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, INVALID_UID, group,
1958 p, buflen);
1da177e4
LT		 1959}
1960
b37ad28b 1961static inline __be32
ab8e4aee 1962nfsd4_encode_aclname(struct svc_rqst *rqstp, struct nfs4_ace *ace,
2ebbc012 1963 __be32 **p, int *buflen)
1da177e4 1964{
ab8e4aee
EB		 1965 kuid_t uid = INVALID_UID;
1966 kgid_t gid = INVALID_GID;
1967
1968 if (ace->whotype == NFS4_ACL_WHO_NAMED) {
1969 if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
1970 gid = ace->who_gid;
1971 else
1972 uid = ace->who_uid;
1973 }
1974 return nfsd4_encode_name(rqstp, ace->whotype, uid, gid, p, buflen);
1da177e4
LT		 1975}
1976
42ca0993
BF		 1977#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1978 FATTR4_WORD0_RDATTR_ERROR)
1979#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1980
18032ca0
DQ		 1981#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
1982static inline __be32
1983nfsd4_encode_security_label(struct svc_rqst *rqstp, void *context, int len, __be32 **pp, int *buflen)
1984{
1985 __be32 *p = *pp;
1986
1987 if (*buflen < ((XDR_QUADLEN(len) << 2) + 4 + 4 + 4))
1988 return nfserr_resource;
1989
1990 /*
1991 * For now we use a 0 here to indicate the null translation; in
1992 * the future we may place a call to translation code here.
1993 */
1994 if ((*buflen -= 8) < 0)
1995 return nfserr_resource;
1996
1997 WRITE32(0); /* lfs */
1998 WRITE32(0); /* pi */
1999 p = xdr_encode_opaque(p, context, len);
2000 *buflen -= (XDR_QUADLEN(len) << 2) + 4;
2001
2002 *pp = p;
2003 return 0;
2004}
2005#else
2006static inline __be32
ba4e55bb 2007nfsd4_encode_security_label(struct svc_rqst *rqstp, void *context, int len, __be32 **pp, int *buflen)
18032ca0
DQ		 2008{ return 0; }
2009#endif
2010
b37ad28b 2011static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
42ca0993
BF		 2012{
2013 /* As per referral draft: */
2014 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2015 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2016 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2017 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2018 *rdattr_err = NFSERR_MOVED;
2019 else
2020 return nfserr_moved;
2021 }
2022 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2023 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
2024 return 0;
2025}
1da177e4 2026
ae7095a7
BF		 2027
2028static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2029{
2030 struct path path = exp->ex_path;
2031 int err;
2032
2033 path_get(&path);
2034 while (follow_up(&path)) {
2035 if (path.dentry != path.mnt->mnt_root)
2036 break;
2037 }
3dadecce 2038 err = vfs_getattr(&path, stat);
ae7095a7
BF		 2039 path_put(&path);
2040 return err;
2041}
2042
1da177e4
LT		 2043/*
2044 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2045 * ourselves.
2046 *
84822d0b 2047 * countp is the buffer size in _words_
1da177e4 2048 */
b37ad28b 2049__be32
1da177e4 2050nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
84822d0b 2051 struct dentry *dentry, __be32 **buffer, int count, u32 *bmval,
406a7ea9 2052 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 2053{
2054 u32 bmval0 = bmval[0];
2055 u32 bmval1 = bmval[1];
7e705706 2056 u32 bmval2 = bmval[2];
1da177e4
LT		 2057 struct kstat stat;
2058 struct svc_fh tempfh;
2059 struct kstatfs statfs;
84822d0b 2060 int buflen = count << 2;
2ebbc012 2061 __be32 *attrlenp;
1da177e4
LT		 2062 u32 dummy;
2063 u64 dummy64;
42ca0993 2064 u32 rdattr_err = 0;
84822d0b 2065 __be32 *p = *buffer;
b37ad28b 2066 __be32 status;
b8dd7b9a 2067 int err;
1da177e4
LT		 2068 int aclsupport = 0;
2069 struct nfs4_acl *acl = NULL;
18032ca0
DQ		 2070 void *context = NULL;
2071 int contextlen;
2072 bool contextsupport = false;
7e705706
AA		 2073 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2074 u32 minorversion = resp->cstate.minorversion;
ebabe9a9
CH		 2075 struct path path = {
2076 .mnt = exp->ex_path.mnt,
2077 .dentry = dentry,
2078 };
3d733711 2079 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1da177e4
LT		 2080
2081 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
7e705706
AA		 2082 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
2083 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
2084 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
1da177e4 2085
42ca0993 2086 if (exp->ex_fslocs.migrated) {
7e705706 2087 BUG_ON(bmval[2]);
42ca0993
BF		 2088 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
2089 if (status)
2090 goto out;
2091 }
2092
3dadecce 2093 err = vfs_getattr(&path, &stat);
b8dd7b9a 2094 if (err)
1da177e4 2095 goto out_nfserr;
a16e92ed
BF		 2096 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
2097 FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 2098 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2099 FATTR4_WORD1_SPACE_TOTAL))) {
ebabe9a9 2100 err = vfs_statfs(&path, &statfs);
b8dd7b9a 2101 if (err)
1da177e4
LT		 2102 goto out_nfserr;
2103 }
2104 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
2105 fh_init(&tempfh, NFS4_FHSIZE);
2106 status = fh_compose(&tempfh, exp, dentry, NULL);
2107 if (status)
2108 goto out;
2109 fhp = &tempfh;
2110 }
2111 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
2112 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
b8dd7b9a
AV		 2113 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2114 aclsupport = (err == 0);
1da177e4 2115 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 2116 if (err == -EOPNOTSUPP)
1da177e4 2117 bmval0 &= ~FATTR4_WORD0_ACL;
b8dd7b9a 2118 else if (err == -EINVAL) {
1da177e4
LT		 2119 status = nfserr_attrnotsupp;
2120 goto out;
b8dd7b9a 2121 } else if (err != 0)
1da177e4
LT		 2122 goto out_nfserr;
2123 }
2124 }
1da177e4 2125
18032ca0
DQ		 2126#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2127 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) ||
2128 bmval[0] & FATTR4_WORD0_SUPPORTED_ATTRS) {
2129 err = security_inode_getsecctx(dentry->d_inode,
2130 &context, &contextlen);
2131 contextsupport = (err == 0);
2132 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2133 if (err == -EOPNOTSUPP)
2134 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2135 else if (err)
2136 goto out_nfserr;
2137 }
2138 }
2139#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2140
2b44f1ba
BH		 2141 if (bmval2) {
2142 if ((buflen -= 16) < 0)
2143 goto out_resource;
7e705706
AA		 2144 WRITE32(3);
2145 WRITE32(bmval0);
2146 WRITE32(bmval1);
2147 WRITE32(bmval2);
2b44f1ba
BH		 2148 } else if (bmval1) {
2149 if ((buflen -= 12) < 0)
2150 goto out_resource;
7e705706
AA		 2151 WRITE32(2);
2152 WRITE32(bmval0);
2153 WRITE32(bmval1);
2154 } else {
2b44f1ba
BH		 2155 if ((buflen -= 8) < 0)
2156 goto out_resource;
7e705706
AA		 2157 WRITE32(1);
2158 WRITE32(bmval0);
2159 }
1da177e4
LT		 2160 attrlenp = p++; /* to be backfilled later */
2161
2162 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
7e705706
AA		 2163 u32 word0 = nfsd_suppattrs0(minorversion);
2164 u32 word1 = nfsd_suppattrs1(minorversion);
2165 u32 word2 = nfsd_suppattrs2(minorversion);
2166
42ca0993
BF		 2167 if (!aclsupport)
2168 word0 &= ~FATTR4_WORD0_ACL;
18032ca0
DQ		 2169 if (!contextsupport)
2170 word2 &= ~FATTR4_WORD2_SECURITY_LABEL;
7e705706 2171 if (!word2) {
2b44f1ba
BH		 2172 if ((buflen -= 12) < 0)
2173 goto out_resource;
7e705706
AA		 2174 WRITE32(2);
2175 WRITE32(word0);
2176 WRITE32(word1);
2177 } else {
2b44f1ba
BH		 2178 if ((buflen -= 16) < 0)
2179 goto out_resource;
7e705706
AA		 2180 WRITE32(3);
2181 WRITE32(word0);
2182 WRITE32(word1);
2183 WRITE32(word2);
2184 }
1da177e4
LT		 2185 }
2186 if (bmval0 & FATTR4_WORD0_TYPE) {
2187 if ((buflen -= 4) < 0)
2188 goto out_resource;
3d2544b1 2189 dummy = nfs4_file_type(stat.mode);
1da177e4
LT		 2190 if (dummy == NF4BAD)
2191 goto out_serverfault;
2192 WRITE32(dummy);
2193 }
2194 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
2195 if ((buflen -= 4) < 0)
2196 goto out_resource;
49640001 2197 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
e34ac862 2198 WRITE32(NFS4_FH_PERSISTENT);
49640001 2199 else
e34ac862 2200 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1da177e4
LT		 2201 }
2202 if (bmval0 & FATTR4_WORD0_CHANGE) {
1da177e4
LT		 2203 if ((buflen -= 8) < 0)
2204 goto out_resource;
c654b8a9 2205 write_change(&p, &stat, dentry->d_inode);
1da177e4
LT		 2206 }
2207 if (bmval0 & FATTR4_WORD0_SIZE) {
2208 if ((buflen -= 8) < 0)
2209 goto out_resource;
2210 WRITE64(stat.size);
2211 }
2212 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
2213 if ((buflen -= 4) < 0)
2214 goto out_resource;
2215 WRITE32(1);
2216 }
2217 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
2218 if ((buflen -= 4) < 0)
2219 goto out_resource;
2220 WRITE32(1);
2221 }
2222 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
2223 if ((buflen -= 4) < 0)
2224 goto out_resource;
2225 WRITE32(0);
2226 }
2227 if (bmval0 & FATTR4_WORD0_FSID) {
2228 if ((buflen -= 16) < 0)
2229 goto out_resource;
42ca0993
BF		 2230 if (exp->ex_fslocs.migrated) {
2231 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
2232 WRITE64(NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 2233 } else switch(fsid_source(fhp)) {
2234 case FSIDSOURCE_FSID:
1da177e4
LT		 2235 WRITE64((u64)exp->ex_fsid);
2236 WRITE64((u64)0);
af6a4e28
N		 2237 break;
2238 case FSIDSOURCE_DEV:
1da177e4
LT		 2239 WRITE32(0);
2240 WRITE32(MAJOR(stat.dev));
2241 WRITE32(0);
2242 WRITE32(MINOR(stat.dev));
af6a4e28
N		 2243 break;
2244 case FSIDSOURCE_UUID:
2245 WRITEMEM(exp->ex_uuid, 16);
2246 break;
1da177e4
LT		 2247 }
2248 }
2249 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
2250 if ((buflen -= 4) < 0)
2251 goto out_resource;
2252 WRITE32(0);
2253 }
2254 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
2255 if ((buflen -= 4) < 0)
2256 goto out_resource;
3d733711 2257 WRITE32(nn->nfsd4_lease);
1da177e4
LT		 2258 }
2259 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
2260 if ((buflen -= 4) < 0)
2261 goto out_resource;
42ca0993 2262 WRITE32(rdattr_err);
1da177e4
LT		 2263 }
2264 if (bmval0 & FATTR4_WORD0_ACL) {
2265 struct nfs4_ace *ace;
1da177e4
LT		 2266
2267 if (acl == NULL) {
2268 if ((buflen -= 4) < 0)
2269 goto out_resource;
2270
2271 WRITE32(0);
2272 goto out_acl;
2273 }
2274 if ((buflen -= 4) < 0)
2275 goto out_resource;
2276 WRITE32(acl->naces);
2277
28e05dd8 2278 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
1da177e4
LT		 2279 if ((buflen -= 4*3) < 0)
2280 goto out_resource;
2281 WRITE32(ace->type);
2282 WRITE32(ace->flag);
2283 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
ab8e4aee 2284 status = nfsd4_encode_aclname(rqstp, ace, &p, &buflen);
1da177e4
LT		 2285 if (status == nfserr_resource)
2286 goto out_resource;
2287 if (status)
2288 goto out;
2289 }
2290 }
2291out_acl:
2292 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
2293 if ((buflen -= 4) < 0)
2294 goto out_resource;
2295 WRITE32(aclsupport ?
2296 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2297 }
2298 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
2299 if ((buflen -= 4) < 0)
2300 goto out_resource;
2301 WRITE32(1);
2302 }
2303 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
2304 if ((buflen -= 4) < 0)
2305 goto out_resource;
2930d381 2306 WRITE32(0);
1da177e4
LT		 2307 }
2308 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
2309 if ((buflen -= 4) < 0)
2310 goto out_resource;
2311 WRITE32(1);
2312 }
2313 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2314 if ((buflen -= 4) < 0)
2315 goto out_resource;
2316 WRITE32(1);
2317 }
2318 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2319 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
2320 if (buflen < 0)
2321 goto out_resource;
2322 WRITE32(fhp->fh_handle.fh_size);
2323 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
2324 }
2325 if (bmval0 & FATTR4_WORD0_FILEID) {
2326 if ((buflen -= 8) < 0)
2327 goto out_resource;
40ee5dc6 2328 WRITE64(stat.ino);
1da177e4
LT		 2329 }
2330 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2331 if ((buflen -= 8) < 0)
2332 goto out_resource;
2333 WRITE64((u64) statfs.f_ffree);
2334 }
2335 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2336 if ((buflen -= 8) < 0)
2337 goto out_resource;
2338 WRITE64((u64) statfs.f_ffree);
2339 }
2340 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2341 if ((buflen -= 8) < 0)
2342 goto out_resource;
2343 WRITE64((u64) statfs.f_files);
2344 }
81c3f413
BF		 2345 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2346 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
2347 if (status == nfserr_resource)
2348 goto out_resource;
2349 if (status)
2350 goto out;
2351 }
1da177e4
LT		 2352 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2353 if ((buflen -= 4) < 0)
2354 goto out_resource;
2355 WRITE32(1);
2356 }
2357 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2358 if ((buflen -= 8) < 0)
2359 goto out_resource;
2360 WRITE64(~(u64)0);
2361 }
2362 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2363 if ((buflen -= 4) < 0)
2364 goto out_resource;
2365 WRITE32(255);
2366 }
2367 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2368 if ((buflen -= 4) < 0)
2369 goto out_resource;
a16e92ed 2370 WRITE32(statfs.f_namelen);
1da177e4
LT		 2371 }
2372 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2373 if ((buflen -= 8) < 0)
2374 goto out_resource;
7adae489 2375 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 2376 }
2377 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2378 if ((buflen -= 8) < 0)
2379 goto out_resource;
7adae489 2380 WRITE64((u64) svc_max_payload(rqstp));
1da177e4
LT		 2381 }
2382 if (bmval1 & FATTR4_WORD1_MODE) {
2383 if ((buflen -= 4) < 0)
2384 goto out_resource;
2385 WRITE32(stat.mode & S_IALLUGO);
2386 }
2387 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2388 if ((buflen -= 4) < 0)
2389 goto out_resource;
2390 WRITE32(1);
2391 }
2392 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2393 if ((buflen -= 4) < 0)
2394 goto out_resource;
2395 WRITE32(stat.nlink);
2396 }
2397 if (bmval1 & FATTR4_WORD1_OWNER) {
2398 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
2399 if (status == nfserr_resource)
2400 goto out_resource;
2401 if (status)
2402 goto out;
2403 }
2404 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2405 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
2406 if (status == nfserr_resource)
2407 goto out_resource;
2408 if (status)
2409 goto out;
2410 }
2411 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2412 if ((buflen -= 8) < 0)
2413 goto out_resource;
2414 WRITE32((u32) MAJOR(stat.rdev));
2415 WRITE32((u32) MINOR(stat.rdev));
2416 }
2417 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2418 if ((buflen -= 8) < 0)
2419 goto out_resource;
2420 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2421 WRITE64(dummy64);
2422 }
2423 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2424 if ((buflen -= 8) < 0)
2425 goto out_resource;
2426 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2427 WRITE64(dummy64);
2428 }
2429 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2430 if ((buflen -= 8) < 0)
2431 goto out_resource;
2432 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2433 WRITE64(dummy64);
2434 }
2435 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2436 if ((buflen -= 8) < 0)
2437 goto out_resource;
2438 dummy64 = (u64)stat.blocks << 9;
2439 WRITE64(dummy64);
2440 }
2441 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2442 if ((buflen -= 12) < 0)
2443 goto out_resource;
bf8d9097 2444 WRITE64((s64)stat.atime.tv_sec);
1da177e4
LT		 2445 WRITE32(stat.atime.tv_nsec);
2446 }
2447 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2448 if ((buflen -= 12) < 0)
2449 goto out_resource;
2450 WRITE32(0);
2451 WRITE32(1);
2452 WRITE32(0);
2453 }
2454 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2455 if ((buflen -= 12) < 0)
2456 goto out_resource;
bf8d9097 2457 WRITE64((s64)stat.ctime.tv_sec);
1da177e4
LT		 2458 WRITE32(stat.ctime.tv_nsec);
2459 }
2460 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2461 if ((buflen -= 12) < 0)
2462 goto out_resource;
bf8d9097 2463 WRITE64((s64)stat.mtime.tv_sec);
1da177e4
LT		 2464 WRITE32(stat.mtime.tv_nsec);
2465 }
2466 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
1da177e4
LT		 2467 if ((buflen -= 8) < 0)
2468 goto out_resource;
406a7ea9
FF		 2469 /*
2470 * Get parent's attributes if not ignoring crossmount
2471 * and this is the root of a cross-mounted filesystem.
2472 */
2473 if (ignore_crossmnt == 0 &&
ae7095a7
BF		 2474 dentry == exp->ex_path.mnt->mnt_root)
2475 get_parent_attributes(exp, &stat);
40ee5dc6 2476 WRITE64(stat.ino);
1da177e4 2477 }
18032ca0
DQ		 2478 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2479 status = nfsd4_encode_security_label(rqstp, context,
2480 contextlen, &p, &buflen);
2481 if (status)
2482 goto out;
2483 }
8c18f205
BH		 2484 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2485 WRITE32(3);
2486 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2487 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2488 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2489 }
7e705706 2490
1da177e4 2491 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
84822d0b 2492 *buffer = p;
1da177e4
LT		 2493 status = nfs_ok;
2494
2495out:
ba4e55bb 2496#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
18032ca0
DQ		 2497 if (context)
2498 security_release_secctx(context, contextlen);
ba4e55bb 2499#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
28e05dd8 2500 kfree(acl);
1da177e4
LT		 2501 if (fhp == &tempfh)
2502 fh_put(&tempfh);
2503 return status;
2504out_nfserr:
b8dd7b9a 2505 status = nfserrno(err);
1da177e4
LT		 2506 goto out;
2507out_resource:
1da177e4
LT		 2508 status = nfserr_resource;
2509 goto out;
2510out_serverfault:
2511 status = nfserr_serverfault;
2512 goto out;
2513}
2514
c0ce6ec8
BF		 2515static inline int attributes_need_mount(u32 *bmval)
2516{
2517 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2518 return 1;
2519 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2520 return 1;
2521 return 0;
2522}
2523
b37ad28b 2524static __be32
1da177e4 2525nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
84822d0b 2526 const char *name, int namlen, __be32 **p, int buflen)
1da177e4
LT		 2527{
2528 struct svc_export *exp = cd->rd_fhp->fh_export;
2529 struct dentry *dentry;
b37ad28b 2530 __be32 nfserr;
406a7ea9 2531 int ignore_crossmnt = 0;
1da177e4
LT		 2532
2533 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2534 if (IS_ERR(dentry))
2535 return nfserrno(PTR_ERR(dentry));
b2c0cea6
BF		 2536 if (!dentry->d_inode) {
2537 /*
2538 * nfsd_buffered_readdir drops the i_mutex between
2539 * readdir and calling this callback, leaving a window
2540 * where this directory entry could have gone away.
2541 */
2542 dput(dentry);
2543 return nfserr_noent;
2544 }
1da177e4
LT		 2545
2546 exp_get(exp);
406a7ea9
FF		 2547 /*
2548 * In the case of a mountpoint, the client may be asking for
2549 * attributes that are only properties of the underlying filesystem
2550 * as opposed to the cross-mounted file system. In such a case,
2551 * we will not follow the cross mount and will fill the attribtutes
2552 * directly from the mountpoint dentry.
2553 */
3227fa41 2554 if (nfsd_mountpoint(dentry, exp)) {
021d3a72
BF		 2555 int err;
2556
3227fa41
BF		 2557 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2558 && !attributes_need_mount(cd->rd_bmval)) {
2559 ignore_crossmnt = 1;
2560 goto out_encode;
2561 }
dcb488a3
AA		 2562 /*
2563 * Why the heck aren't we just using nfsd_lookup??
2564 * Different "."/".." handling? Something else?
2565 * At least, add a comment here to explain....
2566 */
021d3a72
BF		 2567 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2568 if (err) {
2569 nfserr = nfserrno(err);
1da177e4
LT		 2570 goto out_put;
2571 }
dcb488a3
AA		 2572 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2573 if (nfserr)
2574 goto out_put;
1da177e4
LT		 2575
2576 }
3227fa41 2577out_encode:
1da177e4 2578 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
406a7ea9 2579 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 2580out_put:
2581 dput(dentry);
2582 exp_put(exp);
2583 return nfserr;
2584}
2585
2ebbc012 2586static __be32 *
b37ad28b 2587nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
1da177e4 2588{
2ebbc012 2589 __be32 *attrlenp;
1da177e4
LT		 2590
2591 if (buflen < 6)
2592 return NULL;
2593 *p++ = htonl(2);
2594 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2595 *p++ = htonl(0); /* bmval1 */
2596
2597 attrlenp = p++;
2598 *p++ = nfserr; /* no htonl */
2599 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2600 return p;
2601}
2602
2603static int
a0ad13ef
N		 2604nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2605 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 2606{
a0ad13ef 2607 struct readdir_cd *ccd = ccdv;
1da177e4
LT		 2608 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2609 int buflen;
2ebbc012 2610 __be32 *p = cd->buffer;
b2c0cea6 2611 __be32 *cookiep;
b37ad28b 2612 __be32 nfserr = nfserr_toosmall;
1da177e4
LT		 2613
2614 /* In nfsv4, "." and ".." never make it onto the wire.. */
2615 if (name && isdotent(name, namlen)) {
2616 cd->common.err = nfs_ok;
2617 return 0;
2618 }
2619
2620 if (cd->offset)
2621 xdr_encode_hyper(cd->offset, (u64) offset);
2622
2623 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2624 if (buflen < 0)
2625 goto fail;
2626
2627 *p++ = xdr_one; /* mark entry present */
b2c0cea6 2628 cookiep = p;
1da177e4
LT		 2629 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2630 p = xdr_encode_array(p, name, namlen); /* name length & name */
2631
84822d0b 2632 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, &p, buflen);
1da177e4
LT		 2633 switch (nfserr) {
2634 case nfs_ok:
1da177e4
LT		 2635 break;
2636 case nfserr_resource:
2637 nfserr = nfserr_toosmall;
2638 goto fail;
b2c0cea6
BF		 2639 case nfserr_noent:
2640 goto skip_entry;
1da177e4
LT		 2641 default:
2642 /*
2643 * If the client requested the RDATTR_ERROR attribute,
2644 * we stuff the error code into this attribute
2645 * and continue. If this attribute was not requested,
2646 * then in accordance with the spec, we fail the
2647 * entire READDIR operation(!)
2648 */
2649 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2650 goto fail;
1da177e4 2651 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
34081efc
FI		 2652 if (p == NULL) {
2653 nfserr = nfserr_toosmall;
1da177e4 2654 goto fail;
34081efc 2655 }
1da177e4
LT		 2656 }
2657 cd->buflen -= (p - cd->buffer);
2658 cd->buffer = p;
b2c0cea6
BF		 2659 cd->offset = cookiep;
2660skip_entry:
1da177e4
LT		 2661 cd->common.err = nfs_ok;
2662 return 0;
2663fail:
2664 cd->common.err = nfserr;
2665 return -EINVAL;
2666}
2667
e2f282b9
BH		 2668static void
2669nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2670{
bc749ca4 2671 __be32 *p;
e2f282b9
BH		 2672
2673 RESERVE_SPACE(sizeof(stateid_t));
2674 WRITE32(sid->si_generation);
2675 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2676 ADJUST_ARGS();
2677}
2678
695e12f8 2679static __be32
b37ad28b 2680nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4 2681{
bc749ca4 2682 __be32 *p;
1da177e4
LT		 2683
2684 if (!nfserr) {
2685 RESERVE_SPACE(8);
2686 WRITE32(access->ac_supported);
2687 WRITE32(access->ac_resp_access);
2688 ADJUST_ARGS();
2689 }
695e12f8 2690 return nfserr;
1da177e4
LT		 2691}
2692
1d1bc8f2
BF		 2693static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
2694{
2695 __be32 *p;
2696
2697 if (!nfserr) {
2698 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 8);
2699 WRITEMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
2700 WRITE32(bcts->dir);
6e67b5d1 2701 /* Sorry, we do not yet support RDMA over 4.1: */
1d1bc8f2
BF		 2702 WRITE32(0);
2703 ADJUST_ARGS();
2704 }
2705 return nfserr;
2706}
2707
695e12f8 2708static __be32
b37ad28b 2709nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4 2710{
e2f282b9
BH		 2711 if (!nfserr)
2712 nfsd4_encode_stateid(resp, &close->cl_stateid);
2713
695e12f8 2714 return nfserr;
1da177e4
LT		 2715}
2716
2717
695e12f8 2718static __be32
b37ad28b 2719nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4 2720{
bc749ca4 2721 __be32 *p;
1da177e4
LT		 2722
2723 if (!nfserr) {
ab4684d1
CL		 2724 RESERVE_SPACE(NFS4_VERIFIER_SIZE);
2725 WRITEMEM(commit->co_verf.data, NFS4_VERIFIER_SIZE);
1da177e4
LT		 2726 ADJUST_ARGS();
2727 }
695e12f8 2728 return nfserr;
1da177e4
LT		 2729}
2730
695e12f8 2731static __be32
b37ad28b 2732nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4 2733{
bc749ca4 2734 __be32 *p;
1da177e4
LT		 2735
2736 if (!nfserr) {
2737 RESERVE_SPACE(32);
c654b8a9 2738 write_cinfo(&p, &create->cr_cinfo);
1da177e4
LT		 2739 WRITE32(2);
2740 WRITE32(create->cr_bmval[0]);
2741 WRITE32(create->cr_bmval[1]);
2742 ADJUST_ARGS();
2743 }
695e12f8 2744 return nfserr;
1da177e4
LT		 2745}
2746
b37ad28b
AV		 2747static __be32
2748nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 2749{
2750 struct svc_fh *fhp = getattr->ga_fhp;
2751 int buflen;
2752
2753 if (nfserr)
2754 return nfserr;
2755
2756 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2757 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
84822d0b 2758 &resp->p, buflen, getattr->ga_bmval,
406a7ea9 2759 resp->rqstp, 0);
1da177e4
LT		 2760 return nfserr;
2761}
2762
695e12f8
BH		 2763static __be32
2764nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
1da177e4 2765{
695e12f8 2766 struct svc_fh *fhp = *fhpp;
1da177e4 2767 unsigned int len;
bc749ca4 2768 __be32 *p;
1da177e4
LT		 2769
2770 if (!nfserr) {
2771 len = fhp->fh_handle.fh_size;
2772 RESERVE_SPACE(len + 4);
2773 WRITE32(len);
2774 WRITEMEM(&fhp->fh_handle.fh_base, len);
2775 ADJUST_ARGS();
2776 }
695e12f8 2777 return nfserr;
1da177e4
LT		 2778}
2779
2780/*
2781* Including all fields other than the name, a LOCK4denied structure requires
2782* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2783*/
2784static void
2785nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2786{
7c13f344 2787 struct xdr_netobj *conf = &ld->ld_owner;
bc749ca4 2788 __be32 *p;
1da177e4 2789
7c13f344 2790 RESERVE_SPACE(32 + XDR_LEN(conf->len));
1da177e4
LT		 2791 WRITE64(ld->ld_start);
2792 WRITE64(ld->ld_length);
2793 WRITE32(ld->ld_type);
7c13f344 2794 if (conf->len) {
1da177e4 2795 WRITEMEM(&ld->ld_clientid, 8);
7c13f344
BF		 2796 WRITE32(conf->len);
2797 WRITEMEM(conf->data, conf->len);
2798 kfree(conf->data);
1da177e4
LT		 2799 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2800 WRITE64((u64)0); /* clientid */
2801 WRITE32(0); /* length of owner name */
2802 }
2803 ADJUST_ARGS();
2804}
2805
695e12f8 2806static __be32
b37ad28b 2807nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 2808{
e2f282b9
BH		 2809 if (!nfserr)
2810 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2811 else if (nfserr == nfserr_denied)
1da177e4
LT		 2812 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2813
695e12f8 2814 return nfserr;
1da177e4
LT		 2815}
2816
695e12f8 2817static __be32
b37ad28b 2818nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4
LT		 2819{
2820 if (nfserr == nfserr_denied)
2821 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
695e12f8 2822 return nfserr;
1da177e4
LT		 2823}
2824
695e12f8 2825static __be32
b37ad28b 2826nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4 2827{
e2f282b9
BH		 2828 if (!nfserr)
2829 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2830
695e12f8 2831 return nfserr;
1da177e4
LT		 2832}
2833
2834
695e12f8 2835static __be32
b37ad28b 2836nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4 2837{
bc749ca4 2838 __be32 *p;
1da177e4
LT		 2839
2840 if (!nfserr) {
2841 RESERVE_SPACE(20);
c654b8a9 2842 write_cinfo(&p, &link->li_cinfo);
1da177e4
LT		 2843 ADJUST_ARGS();
2844 }
695e12f8 2845 return nfserr;
1da177e4
LT		 2846}
2847
2848
695e12f8 2849static __be32
b37ad28b 2850nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4 2851{
bc749ca4 2852 __be32 *p;
1da177e4
LT		 2853
2854 if (nfserr)
2855 goto out;
2856
e2f282b9
BH		 2857 nfsd4_encode_stateid(resp, &open->op_stateid);
2858 RESERVE_SPACE(40);
c654b8a9 2859 write_cinfo(&p, &open->op_cinfo);
1da177e4
LT		 2860 WRITE32(open->op_rflags);
2861 WRITE32(2);
2862 WRITE32(open->op_bmval[0]);
2863 WRITE32(open->op_bmval[1]);
2864 WRITE32(open->op_delegate_type);
2865 ADJUST_ARGS();
2866
2867 switch (open->op_delegate_type) {
2868 case NFS4_OPEN_DELEGATE_NONE:
2869 break;
2870 case NFS4_OPEN_DELEGATE_READ:
e2f282b9
BH		 2871 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2872 RESERVE_SPACE(20);
7b190fec 2873 WRITE32(open->op_recall);
1da177e4
LT		 2874
2875 /*
2876 * TODO: ACE's in delegations
2877 */
2878 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2879 WRITE32(0);
2880 WRITE32(0);
2881 WRITE32(0); /* XXX: is NULL principal ok? */
2882 ADJUST_ARGS();
2883 break;
2884 case NFS4_OPEN_DELEGATE_WRITE:
e2f282b9
BH		 2885 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2886 RESERVE_SPACE(32);
1da177e4
LT		 2887 WRITE32(0);
2888
2889 /*
2890 * TODO: space_limit's in delegations
2891 */
2892 WRITE32(NFS4_LIMIT_SIZE);
2893 WRITE32(~(u32)0);
2894 WRITE32(~(u32)0);
2895
2896 /*
2897 * TODO: ACE's in delegations
2898 */
2899 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2900 WRITE32(0);
2901 WRITE32(0);
2902 WRITE32(0); /* XXX: is NULL principal ok? */
2903 ADJUST_ARGS();
2904 break;
d24433cd
BH		 2905 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
2906 switch (open->op_why_no_deleg) {
2907 case WND4_CONTENTION:
2908 case WND4_RESOURCE:
2909 RESERVE_SPACE(8);
2910 WRITE32(open->op_why_no_deleg);
2911 WRITE32(0); /* deleg signaling not supported yet */
2912 break;
2913 default:
2914 RESERVE_SPACE(4);
2915 WRITE32(open->op_why_no_deleg);
2916 }
2917 ADJUST_ARGS();
2918 break;
1da177e4
LT		 2919 default:
2920 BUG();
2921 }
2922 /* XXX save filehandle here */
2923out:
695e12f8 2924 return nfserr;
1da177e4
LT		 2925}
2926
695e12f8 2927static __be32
b37ad28b 2928nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4 2929{
e2f282b9
BH		 2930 if (!nfserr)
2931 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
1da177e4 2932
695e12f8 2933 return nfserr;
1da177e4
LT		 2934}
2935
695e12f8 2936static __be32
b37ad28b 2937nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4 2938{
e2f282b9
BH		 2939 if (!nfserr)
2940 nfsd4_encode_stateid(resp, &od->od_stateid);
1da177e4 2941
695e12f8 2942 return nfserr;
1da177e4
LT		 2943}
2944
b37ad28b
AV		 2945static __be32
2946nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
44524359 2947 struct nfsd4_read *read)
1da177e4
LT		 2948{
2949 u32 eof;
afc59400
BF		 2950 int v;
2951 struct page *page;
1da177e4
LT		 2952 unsigned long maxcount;
2953 long len;
bc749ca4 2954 __be32 *p;
1da177e4
LT		 2955
2956 if (nfserr)
2957 return nfserr;
2958 if (resp->xbuf->page_len)
2959 return nfserr_resource;
2960
2961 RESERVE_SPACE(8); /* eof flag and byte count */
2962
7adae489 2963 maxcount = svc_max_payload(resp->rqstp);
1da177e4
LT		 2964 if (maxcount > read->rd_length)
2965 maxcount = read->rd_length;
2966
2967 len = maxcount;
2968 v = 0;
2969 while (len > 0) {
afc59400
BF		 2970 page = *(resp->rqstp->rq_next_page);
2971 if (!page) { /* ran out of pages */
d5f50b0c
BF		 2972 maxcount -= len;
2973 break;
2974 }
afc59400 2975 resp->rqstp->rq_vec[v].iov_base = page_address(page);
3cc03b16 2976 resp->rqstp->rq_vec[v].iov_len =
44524359 2977 len < PAGE_SIZE ? len : PAGE_SIZE;
afc59400 2978 resp->rqstp->rq_next_page++;
1da177e4
LT		 2979 v++;
2980 len -= PAGE_SIZE;
2981 }
2982 read->rd_vlen = v;
2983
039a87ca 2984 nfserr = nfsd_read_file(read->rd_rqstp, read->rd_fhp, read->rd_filp,
3cc03b16 2985 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
1da177e4
LT		 2986 &maxcount);
2987
1da177e4
LT		 2988 if (nfserr)
2989 return nfserr;
44524359
N		 2990 eof = (read->rd_offset + maxcount >=
2991 read->rd_fhp->fh_dentry->d_inode->i_size);
1da177e4
LT		 2992
2993 WRITE32(eof);
2994 WRITE32(maxcount);
2995 ADJUST_ARGS();
6ed6decc
N		 2996 resp->xbuf->head[0].iov_len = (char*)p
2997 - (char*)resp->xbuf->head[0].iov_base;
1da177e4
LT		 2998 resp->xbuf->page_len = maxcount;
2999
6ed6decc 3000 /* Use rest of head for padding and remaining ops: */
6ed6decc 3001 resp->xbuf->tail[0].iov_base = p;
1da177e4 3002 resp->xbuf->tail[0].iov_len = 0;
1da177e4 3003 if (maxcount&3) {
6ed6decc
N		 3004 RESERVE_SPACE(4);
3005 WRITE32(0);
1da177e4
LT		 3006 resp->xbuf->tail[0].iov_base += maxcount&3;
3007 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 3008 ADJUST_ARGS();
1da177e4
LT		 3009 }
3010 return 0;
3011}
3012
b37ad28b
AV		 3013static __be32
3014nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 3015{
3016 int maxcount;
3017 char *page;
bc749ca4 3018 __be32 *p;
1da177e4
LT		 3019
3020 if (nfserr)
3021 return nfserr;
3022 if (resp->xbuf->page_len)
3023 return nfserr_resource;
afc59400 3024 if (!*resp->rqstp->rq_next_page)
d5f50b0c 3025 return nfserr_resource;
1da177e4 3026
afc59400 3027 page = page_address(*(resp->rqstp->rq_next_page++));
1da177e4
LT		 3028
3029 maxcount = PAGE_SIZE;
3030 RESERVE_SPACE(4);
3031
3032 /*
3033 * XXX: By default, the ->readlink() VFS op will truncate symlinks
3034 * if they would overflow the buffer. Is this kosher in NFSv4? If
3035 * not, one easy fix is: if ->readlink() precisely fills the buffer,
3036 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
3037 */
3038 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
3039 if (nfserr == nfserr_isdir)
3040 return nfserr_inval;
3041 if (nfserr)
3042 return nfserr;
3043
3044 WRITE32(maxcount);
3045 ADJUST_ARGS();
6ed6decc
N		 3046 resp->xbuf->head[0].iov_len = (char*)p
3047 - (char*)resp->xbuf->head[0].iov_base;
3048 resp->xbuf->page_len = maxcount;
1da177e4 3049
6ed6decc 3050 /* Use rest of head for padding and remaining ops: */
6ed6decc 3051 resp->xbuf->tail[0].iov_base = p;
1da177e4 3052 resp->xbuf->tail[0].iov_len = 0;
1da177e4 3053 if (maxcount&3) {
6ed6decc
N		 3054 RESERVE_SPACE(4);
3055 WRITE32(0);
1da177e4
LT		 3056 resp->xbuf->tail[0].iov_base += maxcount&3;
3057 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
6ed6decc 3058 ADJUST_ARGS();
1da177e4
LT		 3059 }
3060 return 0;
3061}
3062
b37ad28b
AV		 3063static __be32
3064nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 3065{
3066 int maxcount;
3067 loff_t offset;
2ebbc012 3068 __be32 *page, *savep, *tailbase;
bc749ca4 3069 __be32 *p;
1da177e4
LT		 3070
3071 if (nfserr)
3072 return nfserr;
3073 if (resp->xbuf->page_len)
3074 return nfserr_resource;
afc59400 3075 if (!*resp->rqstp->rq_next_page)
d5f50b0c 3076 return nfserr_resource;
1da177e4 3077
ab4684d1 3078 RESERVE_SPACE(NFS4_VERIFIER_SIZE);
1da177e4
LT		 3079 savep = p;
3080
3081 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
3082 WRITE32(0);
3083 WRITE32(0);
3084 ADJUST_ARGS();
3085 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
bb6e8a9f 3086 tailbase = p;
1da177e4
LT		 3087
3088 maxcount = PAGE_SIZE;
3089 if (maxcount > readdir->rd_maxcount)
3090 maxcount = readdir->rd_maxcount;
3091
3092 /*
3093 * Convert from bytes to words, account for the two words already
3094 * written, make sure to leave two words at the end for the next
3095 * pointer and eof field.
3096 */
3097 maxcount = (maxcount >> 2) - 4;
3098 if (maxcount < 0) {
3099 nfserr = nfserr_toosmall;
3100 goto err_no_verf;
3101 }
3102
afc59400 3103 page = page_address(*(resp->rqstp->rq_next_page++));
1da177e4
LT		 3104 readdir->common.err = 0;
3105 readdir->buflen = maxcount;
3106 readdir->buffer = page;
3107 readdir->offset = NULL;
3108
3109 offset = readdir->rd_cookie;
3110 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3111 &offset,
3112 &readdir->common, nfsd4_encode_dirent);
3113 if (nfserr == nfs_ok &&
3114 readdir->common.err == nfserr_toosmall &&
3115 readdir->buffer == page)
3116 nfserr = nfserr_toosmall;
1da177e4
LT		 3117 if (nfserr)
3118 goto err_no_verf;
3119
3120 if (readdir->offset)
3121 xdr_encode_hyper(readdir->offset, offset);
3122
3123 p = readdir->buffer;
3124 *p++ = 0; /* no more entries */
3125 *p++ = htonl(readdir->common.err == nfserr_eof);
afc59400
BF		 3126 resp->xbuf->page_len = ((char*)p) -
3127 (char*)page_address(*(resp->rqstp->rq_next_page-1));
1da177e4 3128
bb6e8a9f 3129 /* Use rest of head for padding and remaining ops: */
bb6e8a9f 3130 resp->xbuf->tail[0].iov_base = tailbase;
1da177e4
LT		 3131 resp->xbuf->tail[0].iov_len = 0;
3132 resp->p = resp->xbuf->tail[0].iov_base;
bb6e8a9f 3133 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
1da177e4
LT		 3134
3135 return 0;
3136err_no_verf:
3137 p = savep;
3138 ADJUST_ARGS();
3139 return nfserr;
3140}
3141
695e12f8 3142static __be32
b37ad28b 3143nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4 3144{
bc749ca4 3145 __be32 *p;
1da177e4
LT		 3146
3147 if (!nfserr) {
3148 RESERVE_SPACE(20);
c654b8a9 3149 write_cinfo(&p, &remove->rm_cinfo);
1da177e4
LT		 3150 ADJUST_ARGS();
3151 }
695e12f8 3152 return nfserr;
1da177e4
LT		 3153}
3154
695e12f8 3155static __be32
b37ad28b 3156nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4 3157{
bc749ca4 3158 __be32 *p;
1da177e4
LT		 3159
3160 if (!nfserr) {
3161 RESERVE_SPACE(40);
c654b8a9
BF		 3162 write_cinfo(&p, &rename->rn_sinfo);
3163 write_cinfo(&p, &rename->rn_tinfo);
1da177e4
LT		 3164 ADJUST_ARGS();
3165 }
695e12f8 3166 return nfserr;
1da177e4
LT		 3167}
3168
695e12f8 3169static __be32
22b6dee8 3170nfsd4_do_encode_secinfo(struct nfsd4_compoundres *resp,
a77c806f 3171 __be32 nfserr, struct svc_export *exp)
dcb488a3 3172{
676e4ebd 3173 u32 i, nflavs, supported;
4796f457
BF		 3174 struct exp_flavor_info *flavs;
3175 struct exp_flavor_info def_flavs[2];
676e4ebd
CL		 3176 __be32 *p, *flavorsp;
3177 static bool report = true;
dcb488a3
AA		 3178
3179 if (nfserr)
3180 goto out;
4796f457
BF		 3181 if (exp->ex_nflavors) {
3182 flavs = exp->ex_flavors;
3183 nflavs = exp->ex_nflavors;
3184 } else { /* Handling of some defaults in absence of real secinfo: */
3185 flavs = def_flavs;
3186 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3187 nflavs = 2;
3188 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3189 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3190 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3191 nflavs = 1;
3192 flavs[0].pseudoflavor
3193 = svcauth_gss_flavor(exp->ex_client);
3194 } else {
3195 nflavs = 1;
3196 flavs[0].pseudoflavor
3197 = exp->ex_client->flavour->flavour;
3198 }
3199 }
3200
676e4ebd 3201 supported = 0;
dcb488a3 3202 RESERVE_SPACE(4);
676e4ebd 3203 flavorsp = p++; /* to be backfilled later */
dcb488a3 3204 ADJUST_ARGS();
676e4ebd 3205
4796f457 3206 for (i = 0; i < nflavs; i++) {
676e4ebd 3207 rpc_authflavor_t pf = flavs[i].pseudoflavor;
a77c806f 3208 struct rpcsec_gss_info info;
dcb488a3 3209
676e4ebd
CL		 3210 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3211 supported++;
ed9411a0 3212 RESERVE_SPACE(4 + 4 + info.oid.len + 4 + 4);
dcb488a3 3213 WRITE32(RPC_AUTH_GSS);
a77c806f
CL		 3214 WRITE32(info.oid.len);
3215 WRITEMEM(info.oid.data, info.oid.len);
a77c806f 3216 WRITE32(info.qop);
a77c806f 3217 WRITE32(info.service);
dcb488a3 3218 ADJUST_ARGS();
676e4ebd
CL		 3219 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3220 supported++;
dcb488a3 3221 RESERVE_SPACE(4);
676e4ebd 3222 WRITE32(pf);
dcb488a3 3223 ADJUST_ARGS();
676e4ebd
CL		 3224 } else {
3225 if (report)
3226 pr_warn("NFS: SECINFO: security flavor %u "
3227 "is not supported\n", pf);
dcb488a3
AA		 3228 }
3229 }
a77c806f 3230
676e4ebd
CL		 3231 if (nflavs != supported)
3232 report = false;
3233 *flavorsp = htonl(supported);
3234
dcb488a3
AA		 3235out:
3236 if (exp)
3237 exp_put(exp);
695e12f8 3238 return nfserr;
dcb488a3
AA		 3239}
3240
22b6dee8
MJ		 3241static __be32
3242nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3243 struct nfsd4_secinfo *secinfo)
3244{
3245 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->si_exp);
3246}
3247
3248static __be32
3249nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3250 struct nfsd4_secinfo_no_name *secinfo)
3251{
3252 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->sin_exp);
3253}
3254
1da177e4
LT		 3255/*
3256 * The SETATTR encode routine is special -- it always encodes a bitmap,
3257 * regardless of the error status.
3258 */
695e12f8 3259static __be32
b37ad28b 3260nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4 3261{
bc749ca4 3262 __be32 *p;
1da177e4 3263
18032ca0 3264 RESERVE_SPACE(16);
1da177e4 3265 if (nfserr) {
18032ca0
DQ		 3266 WRITE32(3);
3267 WRITE32(0);
1da177e4
LT		 3268 WRITE32(0);
3269 WRITE32(0);
3270 }
3271 else {
18032ca0 3272 WRITE32(3);
1da177e4
LT		 3273 WRITE32(setattr->sa_bmval[0]);
3274 WRITE32(setattr->sa_bmval[1]);
18032ca0 3275 WRITE32(setattr->sa_bmval[2]);
1da177e4
LT		 3276 }
3277 ADJUST_ARGS();
695e12f8 3278 return nfserr;
1da177e4
LT		 3279}
3280
695e12f8 3281static __be32
b37ad28b 3282nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4 3283{
bc749ca4 3284 __be32 *p;
1da177e4
LT		 3285
3286 if (!nfserr) {
ab4684d1 3287 RESERVE_SPACE(8 + NFS4_VERIFIER_SIZE);
1da177e4 3288 WRITEMEM(&scd->se_clientid, 8);
ab4684d1 3289 WRITEMEM(&scd->se_confirm, NFS4_VERIFIER_SIZE);
1da177e4
LT		 3290 ADJUST_ARGS();
3291 }
3292 else if (nfserr == nfserr_clid_inuse) {
3293 RESERVE_SPACE(8);
3294 WRITE32(0);
3295 WRITE32(0);
3296 ADJUST_ARGS();
3297 }
695e12f8 3298 return nfserr;
1da177e4
LT		 3299}
3300
695e12f8 3301static __be32
b37ad28b 3302nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4 3303{
bc749ca4 3304 __be32 *p;
1da177e4
LT		 3305
3306 if (!nfserr) {
3307 RESERVE_SPACE(16);
3308 WRITE32(write->wr_bytes_written);
3309 WRITE32(write->wr_how_written);
ab4684d1 3310 WRITEMEM(write->wr_verifier.data, NFS4_VERIFIER_SIZE);
1da177e4
LT		 3311 ADJUST_ARGS();
3312 }
695e12f8 3313 return nfserr;
1da177e4
LT		 3314}
3315
57266a6e
BF		 3316static const u32 nfs4_minimal_spo_must_enforce[2] = {
3317 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
3318 1 << (OP_EXCHANGE_ID - 32) |
3319 1 << (OP_CREATE_SESSION - 32) |
3320 1 << (OP_DESTROY_SESSION - 32) |
3321 1 << (OP_DESTROY_CLIENTID - 32)
3322};
3323
2db134eb 3324static __be32
57b7b43b 3325nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3326 struct nfsd4_exchange_id *exid)
3327{
bc749ca4 3328 __be32 *p;
0733d213
AA		 3329 char *major_id;
3330 char *server_scope;
3331 int major_id_sz;
3332 int server_scope_sz;
3333 uint64_t minor_id = 0;
3334
3335 if (nfserr)
3336 return nfserr;
3337
3338 major_id = utsname()->nodename;
3339 major_id_sz = strlen(major_id);
3340 server_scope = utsname()->nodename;
3341 server_scope_sz = strlen(server_scope);
3342
3343 RESERVE_SPACE(
3344 8 /* eir_clientid */ +
3345 4 /* eir_sequenceid */ +
3346 4 /* eir_flags */ +
58cd57bf
WAA		 3347 4 /* spr_how */ +
3348 8 /* spo_must_enforce, spo_must_allow */ +
0733d213
AA		 3349 8 /* so_minor_id */ +
3350 4 /* so_major_id.len */ +
3351 (XDR_QUADLEN(major_id_sz) * 4) +
3352 4 /* eir_server_scope.len */ +
3353 (XDR_QUADLEN(server_scope_sz) * 4) +
3354 4 /* eir_server_impl_id.count (0) */);
3355
3356 WRITEMEM(&exid->clientid, 8);
3357 WRITE32(exid->seqid);
3358 WRITE32(exid->flags);
3359
0733d213 3360 WRITE32(exid->spa_how);
57266a6e
BF		 3361 switch (exid->spa_how) {
3362 case SP4_NONE:
3363 break;
3364 case SP4_MACH_CRED:
3365 /* spo_must_enforce bitmap: */
3366 WRITE32(2);
3367 WRITE32(nfs4_minimal_spo_must_enforce[0]);
3368 WRITE32(nfs4_minimal_spo_must_enforce[1]);
3369 /* empty spo_must_allow bitmap: */
3370 WRITE32(0);
3371 break;
3372 default:
3373 WARN_ON_ONCE(1);
3374 }
0733d213
AA		 3375
3376 /* The server_owner struct */
3377 WRITE64(minor_id); /* Minor id */
3378 /* major id */
3379 WRITE32(major_id_sz);
3380 WRITEMEM(major_id, major_id_sz);
3381
3382 /* Server scope */
3383 WRITE32(server_scope_sz);
3384 WRITEMEM(server_scope, server_scope_sz);
3385
3386 /* Implementation id */
3387 WRITE32(0); /* zero length nfs_impl_id4 array */
3388 ADJUST_ARGS();
3389 return 0;
2db134eb
AA		 3390}
3391
3392static __be32
57b7b43b 3393nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3394 struct nfsd4_create_session *sess)
3395{
bc749ca4 3396 __be32 *p;
ec6b5d7b
AA		 3397
3398 if (nfserr)
3399 return nfserr;
3400
3401 RESERVE_SPACE(24);
3402 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3403 WRITE32(sess->seqid);
3404 WRITE32(sess->flags);
3405 ADJUST_ARGS();
3406
3407 RESERVE_SPACE(28);
3408 WRITE32(0); /* headerpadsz */
3409 WRITE32(sess->fore_channel.maxreq_sz);
3410 WRITE32(sess->fore_channel.maxresp_sz);
3411 WRITE32(sess->fore_channel.maxresp_cached);
3412 WRITE32(sess->fore_channel.maxops);
3413 WRITE32(sess->fore_channel.maxreqs);
3414 WRITE32(sess->fore_channel.nr_rdma_attrs);
3415 ADJUST_ARGS();
3416
3417 if (sess->fore_channel.nr_rdma_attrs) {
3418 RESERVE_SPACE(4);
3419 WRITE32(sess->fore_channel.rdma_attrs);
3420 ADJUST_ARGS();
3421 }
3422
3423 RESERVE_SPACE(28);
3424 WRITE32(0); /* headerpadsz */
3425 WRITE32(sess->back_channel.maxreq_sz);
3426 WRITE32(sess->back_channel.maxresp_sz);
3427 WRITE32(sess->back_channel.maxresp_cached);
3428 WRITE32(sess->back_channel.maxops);
3429 WRITE32(sess->back_channel.maxreqs);
3430 WRITE32(sess->back_channel.nr_rdma_attrs);
3431 ADJUST_ARGS();
3432
3433 if (sess->back_channel.nr_rdma_attrs) {
3434 RESERVE_SPACE(4);
3435 WRITE32(sess->back_channel.rdma_attrs);
3436 ADJUST_ARGS();
3437 }
3438 return 0;
2db134eb
AA		 3439}
3440
3441static __be32
57b7b43b 3442nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3443 struct nfsd4_destroy_session *destroy_session)
3444{
2db134eb
AA		 3445 return nfserr;
3446}
3447
e1ca12df 3448static __be32
d1829b38 3449nfsd4_encode_free_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
e1ca12df
BS		 3450 struct nfsd4_free_stateid *free_stateid)
3451{
3452 __be32 *p;
3453
3454 if (nfserr)
3455 return nfserr;
3456
3457 RESERVE_SPACE(4);
d1829b38 3458 *p++ = nfserr;
e1ca12df
BS		 3459 ADJUST_ARGS();
3460 return nfserr;
3461}
3462
c47d832b 3463static __be32
57b7b43b 3464nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3465 struct nfsd4_sequence *seq)
3466{
bc749ca4 3467 __be32 *p;
b85d4c01
BH		 3468
3469 if (nfserr)
3470 return nfserr;
3471
3472 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
3473 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3474 WRITE32(seq->seqid);
3475 WRITE32(seq->slotid);
b7d7ca35
BF		 3476 /* Note slotid's are numbered from zero: */
3477 WRITE32(seq->maxslots - 1); /* sr_highest_slotid */
3478 WRITE32(seq->maxslots - 1); /* sr_target_highest_slotid */
0d7bb719 3479 WRITE32(seq->status_flags);
b85d4c01
BH		 3480
3481 ADJUST_ARGS();
557ce264 3482 resp->cstate.datap = p; /* DRC cache data pointer */
b85d4c01 3483 return 0;
2db134eb
AA		 3484}
3485
2355c596 3486static __be32
57b7b43b 3487nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
17456804
BS		 3488 struct nfsd4_test_stateid *test_stateid)
3489{
03cfb420 3490 struct nfsd4_test_stateid_id *stateid, *next;
17456804 3491 __be32 *p;
17456804 3492
03cfb420 3493 RESERVE_SPACE(4 + (4 * test_stateid->ts_num_ids));
17456804 3494 *p++ = htonl(test_stateid->ts_num_ids);
17456804 3495
03cfb420 3496 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
02f5fde5 3497 *p++ = stateid->ts_id_status;
17456804 3498 }
17456804 3499
03cfb420 3500 ADJUST_ARGS();
17456804
BS		 3501 return nfserr;
3502}
3503
695e12f8
BH		 3504static __be32
3505nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3506{
3507 return nfserr;
3508}
3509
3510typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3511
2db134eb
AA		 3512/*
3513 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3514 * since we don't need to filter out obsolete ops as this is
3515 * done in the decoding phase.
3516 */
695e12f8 3517static nfsd4_enc nfsd4_enc_ops[] = {
ad1060c8
BF		 3518 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3519 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3520 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3521 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3522 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3523 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3524 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3525 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3526 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3527 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3528 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3529 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3530 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3531 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3532 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3533 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
84f09f46 3534 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
ad1060c8
BF		 3535 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3536 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3537 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3538 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3539 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3540 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3541 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3542 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3543 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3544 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3545 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3546 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3547 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3548 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3549 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3550 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3551 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3552 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3553 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3554 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 3555
3556 /* NFSv4.1 operations */
3557 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
1d1bc8f2 3558 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
2db134eb
AA		 3559 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3560 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3561 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
e1ca12df 3562 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_free_stateid,
2db134eb
AA		 3563 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3564 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3565 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3566 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3567 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3568 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
22b6dee8 3569 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
2db134eb
AA		 3570 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3571 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
17456804 3572 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
2db134eb
AA		 3573 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3574 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3575 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
695e12f8
BH		 3576};
3577
496c262c
AA		 3578/*
3579 * Calculate the total amount of memory that the compound response has taken
58e7b33a 3580 * after encoding the current operation with pad.
496c262c 3581 *
58e7b33a
MJ		 3582 * pad: if operation is non-idempotent, pad was calculate by op_rsize_bop()
3583 * which was specified at nfsd4_operation, else pad is zero.
496c262c 3584 *
58e7b33a 3585 * Compare this length to the session se_fmaxresp_sz and se_fmaxresp_cached.
496c262c
AA		 3586 *
3587 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
3588 * will be at least a page and will therefore hold the xdr_buf head.
3589 */
57b7b43b 3590__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 pad)
496c262c 3591{
496c262c 3592 struct xdr_buf *xb = &resp->rqstp->rq_res;
496c262c
AA		 3593 struct nfsd4_session *session = NULL;
3594 struct nfsd4_slot *slot = resp->cstate.slot;
58e7b33a 3595 u32 length, tlen = 0;
496c262c
AA		 3596
3597 if (!nfsd4_has_session(&resp->cstate))
58e7b33a 3598 return 0;
496c262c
AA		 3599
3600 session = resp->cstate.session;
58e7b33a
MJ		 3601 if (session == NULL)
3602 return 0;
496c262c
AA		 3603
3604 if (xb->page_len == 0) {
3605 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad;
3606 } else {
3607 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
3608 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base;
3609
3610 length = xb->head[0].iov_len + xb->page_len + tlen + pad;
3611 }
3612 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
3613 length, xb->page_len, tlen, pad);
3614
58e7b33a
MJ		 3615 if (length > session->se_fchannel.maxresp_sz)
3616 return nfserr_rep_too_big;
3617
73e79482 3618 if ((slot->sl_flags & NFSD4_SLOT_CACHETHIS) &&
58e7b33a 3619 length > session->se_fchannel.maxresp_cached)
496c262c 3620 return nfserr_rep_too_big_to_cache;
58e7b33a
MJ		 3621
3622 return 0;
496c262c
AA		 3623}
3624
1da177e4
LT		 3625void
3626nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3627{
9411b1d4 3628 struct nfs4_stateowner *so = resp->cstate.replay_owner;
2ebbc012 3629 __be32 *statp;
bc749ca4 3630 __be32 *p;
1da177e4
LT		 3631
3632 RESERVE_SPACE(8);
3633 WRITE32(op->opnum);
3634 statp = p++; /* to be backfilled at the end */
3635 ADJUST_ARGS();
3636
695e12f8
BH		 3637 if (op->opnum == OP_ILLEGAL)
3638 goto status;
3639 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3640 !nfsd4_enc_ops[op->opnum]);
3641 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
496c262c 3642 /* nfsd4_check_drc_limit guarantees enough room for error status */
58e7b33a
MJ		 3643 if (!op->status)
3644 op->status = nfsd4_check_resp_size(resp, 0);
9411b1d4
BF		 3645 if (so) {
3646 so->so_replay.rp_status = op->status;
3647 so->so_replay.rp_buflen = (char *)resp->p - (char *)(statp+1);
3648 memcpy(so->so_replay.rp_buf, statp+1, so->so_replay.rp_buflen);
3649 }
695e12f8 3650status:
1da177e4
LT		 3651 /*
3652 * Note: We write the status directly, instead of using WRITE32(),
3653 * since it is already in network byte order.
3654 */
3655 *statp = op->status;
3656}
3657
3658/*
3659 * Encode the reply stored in the stateowner reply cache
3660 *
3661 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3662 * previously sent already encoded operation.
3663 *
3664 * called with nfs4_lock_state() held
3665 */
3666void
3667nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3668{
bc749ca4 3669 __be32 *p;
1da177e4
LT		 3670 struct nfs4_replay *rp = op->replay;
3671
3672 BUG_ON(!rp);
3673
3674 RESERVE_SPACE(8);
3675 WRITE32(op->opnum);
3676 *p++ = rp->rp_status; /* already xdr'ed */
3677 ADJUST_ARGS();
3678
3679 RESERVE_SPACE(rp->rp_buflen);
3680 WRITEMEM(rp->rp_buf, rp->rp_buflen);
3681 ADJUST_ARGS();
3682}
3683
1da177e4 3684int
2ebbc012 3685nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
1da177e4
LT		 3686{
3687 return xdr_ressize_check(rqstp, p);
3688}
3689
3e98abff 3690int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
1da177e4 3691{
3e98abff
BF		 3692 struct svc_rqst *rqstp = rq;
3693 struct nfsd4_compoundargs *args = rqstp->rq_argp;
3694
1da177e4
LT		 3695 if (args->ops != args->iops) {
3696 kfree(args->ops);
3697 args->ops = args->iops;
3698 }
f99d49ad
JJ		 3699 kfree(args->tmpp);
3700 args->tmpp = NULL;
1da177e4
LT		 3701 while (args->to_free) {
3702 struct tmpbuf *tb = args->to_free;
3703 args->to_free = tb->next;
3704 tb->release(tb->buf);
3705 kfree(tb);
3706 }
3e98abff 3707 return 1;
1da177e4
LT		 3708}
3709
3710int
2ebbc012 3711nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
1da177e4 3712{
1da177e4
LT		 3713 args->p = p;
3714 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3715 args->pagelist = rqstp->rq_arg.pages;
3716 args->pagelen = rqstp->rq_arg.page_len;
3717 args->tmpp = NULL;
3718 args->to_free = NULL;
3719 args->ops = args->iops;
3720 args->rqstp = rqstp;
3721
3e98abff 3722 return !nfsd4_decode_compound(args);
1da177e4
LT		 3723}
3724
3725int
2ebbc012 3726nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
1da177e4
LT		 3727{
3728 /*
3729 * All that remains is to write the tag and operation count...
3730 */
557ce264 3731 struct nfsd4_compound_state *cs = &resp->cstate;
1da177e4
LT		 3732 struct kvec *iov;
3733 p = resp->tagp;
3734 *p++ = htonl(resp->taglen);
3735 memcpy(p, resp->tag, resp->taglen);
3736 p += XDR_QUADLEN(resp->taglen);
3737 *p++ = htonl(resp->opcnt);
3738
3739 if (rqstp->rq_res.page_len)
3740 iov = &rqstp->rq_res.tail[0];
3741 else
3742 iov = &rqstp->rq_res.head[0];
3743 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3744 BUG_ON(iov->iov_len > PAGE_SIZE);
26c0c75e 3745 if (nfsd4_has_session(cs)) {
f0f51f5c
BF		 3746 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
3747 struct nfs4_client *clp = cs->session->se_client;
26c0c75e
BF		 3748 if (cs->status != nfserr_replay_cache) {
3749 nfsd4_store_cache_entry(resp);
73e79482 3750 cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE;
26c0c75e 3751 }
d7682988 3752 /* Renew the clientid on success and on replay */
f0f51f5c 3753 spin_lock(&nn->client_lock);
221a6876 3754 nfsd4_put_session(cs->session);
f0f51f5c
BF		 3755 spin_unlock(&nn->client_lock);
3756 put_client_renew(clp);
da3846a2 3757 }
1da177e4
LT		 3758 return 1;
3759}
3760
3761/*
3762 * Local variables:
3763 * c-basic-offset: 8
3764 * End:
3765 */
Linux 6.x block layer and io_uring tree(s)