]> git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blame - fs/nfsd/nfs4xdr.c
projects / mirror_ubuntu-bionic-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
nfsd: take struct file setup fully into nfs4_preprocess_stateid_op
[mirror_ubuntu-bionic-kernel.git] / fs / nfsd / nfs4xdr.c
CommitLineData
1da177e4 1/*
1da177e4
LT		 2 * Server-side XDR for NFSv4
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1da177e4
LT		 34 */
35
5a0e3ad6 36#include <linux/slab.h>
1da177e4 37#include <linux/namei.h>
341eb184 38#include <linux/statfs.h>
0733d213 39#include <linux/utsname.h>
17456804 40#include <linux/pagemap.h>
4796f457 41#include <linux/sunrpc/svcauth_gss.h>
9a74af21 42
2ca72e17
BF		 43#include "idmap.h"
44#include "acl.h"
9a74af21 45#include "xdr4.h"
0a3adade 46#include "vfs.h"
17456804 47#include "state.h"
1091006c 48#include "cache.h"
3d733711 49#include "netns.h"
9cf514cc 50#include "pnfs.h"
2ca72e17 51
18032ca0
DQ		 52#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
53#include <linux/security.h>
54#endif
55
56
1da177e4
LT		 57#define NFSDDBG_FACILITY NFSDDBG_XDR
58
42ca0993
BF		 59/*
60 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
61 * directory in order to indicate to the client that a filesystem boundary is present
62 * We use a fixed fsid for a referral
63 */
64#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
65#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
66
b37ad28b 67static __be32
a36b1725 68check_filename(char *str, int len)
1da177e4
LT		 69{
70 int i;
71
72 if (len == 0)
73 return nfserr_inval;
74 if (isdotent(str, len))
a36b1725 75 return nfserr_badname;
1da177e4
LT		 76 for (i = 0; i < len; i++)
77 if (str[i] == '/')
a36b1725 78 return nfserr_badname;
1da177e4
LT		 79 return 0;
80}
81
1da177e4 82#define DECODE_HEAD \
2ebbc012 83 __be32 *p; \
b37ad28b 84 __be32 status
1da177e4
LT		 85#define DECODE_TAIL \
86 status = 0; \
87out: \
88 return status; \
89xdr_error: \
817cb9d4
CL		 90 dprintk("NFSD: xdr error (%s:%d)\n", \
91 __FILE__, __LINE__); \
1da177e4
LT		 92 status = nfserr_bad_xdr; \
93 goto out
94
1da177e4
LT		 95#define READMEM(x,nbytes) do { \
96 x = (char *)p; \
97 p += XDR_QUADLEN(nbytes); \
98} while (0)
99#define SAVEMEM(x,nbytes) do { \
100 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
101 savemem(argp, p, nbytes) : \
102 (char *)p)) { \
817cb9d4
CL		 103 dprintk("NFSD: xdr error (%s:%d)\n", \
104 __FILE__, __LINE__); \
1da177e4
LT		 105 goto xdr_error; \
106 } \
107 p += XDR_QUADLEN(nbytes); \
108} while (0)
109#define COPYMEM(x,nbytes) do { \
110 memcpy((x), p, nbytes); \
111 p += XDR_QUADLEN(nbytes); \
112} while (0)
113
114/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
115#define READ_BUF(nbytes) do { \
116 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
117 p = argp->p; \
118 argp->p += XDR_QUADLEN(nbytes); \
119 } else if (!(p = read_buf(argp, nbytes))) { \
817cb9d4
CL		 120 dprintk("NFSD: xdr error (%s:%d)\n", \
121 __FILE__, __LINE__); \
1da177e4
LT		 122 goto xdr_error; \
123 } \
124} while (0)
125
590b7431
BF		 126static void next_decode_page(struct nfsd4_compoundargs *argp)
127{
590b7431 128 argp->p = page_address(argp->pagelist[0]);
365da4ad 129 argp->pagelist++;
590b7431
BF		 130 if (argp->pagelen < PAGE_SIZE) {
131 argp->end = argp->p + (argp->pagelen>>2);
132 argp->pagelen = 0;
133 } else {
134 argp->end = argp->p + (PAGE_SIZE>>2);
135 argp->pagelen -= PAGE_SIZE;
136 }
137}
138
ca2a05aa 139static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
1da177e4
LT		 140{
141 /* We want more bytes than seem to be available.
142 * Maybe we need a new page, maybe we have just run out
143 */
ca2a05aa 144 unsigned int avail = (char *)argp->end - (char *)argp->p;
2ebbc012 145 __be32 *p;
1da177e4
LT		 146 if (avail + argp->pagelen < nbytes)
147 return NULL;
148 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
149 return NULL;
150 /* ok, we can do it with the current plus the next page */
151 if (nbytes <= sizeof(argp->tmp))
152 p = argp->tmp;
153 else {
f99d49ad 154 kfree(argp->tmpp);
1da177e4
LT		 155 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
156 if (!p)
157 return NULL;
158
159 }
ca2a05aa
BF		 160 /*
161 * The following memcpy is safe because read_buf is always
162 * called with nbytes > avail, and the two cases above both
163 * guarantee p points to at least nbytes bytes.
164 */
1da177e4 165 memcpy(p, argp->p, avail);
590b7431 166 next_decode_page(argp);
1da177e4
LT		 167 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
168 argp->p += XDR_QUADLEN(nbytes - avail);
169 return p;
170}
171
60adfc50
AA		 172static int zero_clientid(clientid_t *clid)
173{
174 return (clid->cl_boot == 0) && (clid->cl_id == 0);
175}
176
2d8498db 177/**
d5e23383 178 * svcxdr_tmpalloc - allocate memory to be freed after compound processing
ce043ac8
BF		 179 * @argp: NFSv4 compound argument structure
180 * @p: pointer to be freed (with kfree())
2d8498db
CH		 181 *
182 * Marks @p to be freed when processing the compound operation
183 * described in @argp finishes.
184 */
d5e23383
BF		 185static void *
186svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len)
1da177e4 187{
d5e23383 188 struct svcxdr_tmpbuf *tb;
1da177e4 189
d5e23383 190 tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL);
1da177e4 191 if (!tb)
d5e23383 192 return NULL;
1da177e4
LT		 193 tb->next = argp->to_free;
194 argp->to_free = tb;
d5e23383 195 return tb->buf;
1da177e4
LT		 196}
197
29c353b3
BF		 198/*
199 * For xdr strings that need to be passed to other kernel api's
200 * as null-terminated strings.
201 *
202 * Note null-terminating in place usually isn't safe since the
203 * buffer might end on a page boundary.
204 */
205static char *
206svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len)
207{
d5e23383 208 char *p = svcxdr_tmpalloc(argp, len + 1);
29c353b3
BF		 209
210 if (!p)
211 return NULL;
212 memcpy(p, buf, len);
213 p[len] = '\0';
29c353b3 214 return p;
1da177e4
LT		 215}
216
2d8498db
CH		 217/**
218 * savemem - duplicate a chunk of memory for later processing
219 * @argp: NFSv4 compound argument structure to be freed with
220 * @p: pointer to be duplicated
221 * @nbytes: length to be duplicated
222 *
223 * Returns a pointer to a copy of @nbytes bytes of memory at @p
224 * that are preserved until processing of the NFSv4 compound
225 * operation described by @argp finishes.
226 */
2ebbc012 227static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
1da177e4 228{
d5e23383
BF		 229 void *ret;
230
231 ret = svcxdr_tmpalloc(argp, nbytes);
232 if (!ret)
1da177e4 233 return NULL;
d5e23383
BF		 234 memcpy(ret, p, nbytes);
235 return ret;
1da177e4
LT		 236}
237
4c94e13e
CH		 238/*
239 * We require the high 32 bits of 'seconds' to be 0, and
240 * we ignore all 32 bits of 'nseconds'.
241 */
242static __be32
243nfsd4_decode_time(struct nfsd4_compoundargs *argp, struct timespec *tv)
244{
245 DECODE_HEAD;
246 u64 sec;
247
248 READ_BUF(12);
249 p = xdr_decode_hyper(p, &sec);
250 tv->tv_sec = sec;
251 tv->tv_nsec = be32_to_cpup(p++);
252 if (tv->tv_nsec >= (u32)1000000000)
253 return nfserr_inval;
254
255 DECODE_TAIL;
256}
257
b37ad28b 258static __be32
1da177e4
LT		 259nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
260{
261 u32 bmlen;
262 DECODE_HEAD;
263
264 bmval[0] = 0;
265 bmval[1] = 0;
7e705706 266 bmval[2] = 0;
1da177e4
LT		 267
268 READ_BUF(4);
06553991 269 bmlen = be32_to_cpup(p++);
1da177e4
LT		 270 if (bmlen > 1000)
271 goto xdr_error;
272
273 READ_BUF(bmlen << 2);
274 if (bmlen > 0)
06553991 275 bmval[0] = be32_to_cpup(p++);
1da177e4 276 if (bmlen > 1)
06553991 277 bmval[1] = be32_to_cpup(p++);
7e705706 278 if (bmlen > 2)
06553991 279 bmval[2] = be32_to_cpup(p++);
1da177e4
LT		 280
281 DECODE_TAIL;
282}
283
b37ad28b 284static __be32
3c8e0316 285nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
18032ca0
DQ		 286 struct iattr *iattr, struct nfs4_acl **acl,
287 struct xdr_netobj *label)
1da177e4
LT		 288{
289 int expected_len, len = 0;
290 u32 dummy32;
291 char *buf;
292
293 DECODE_HEAD;
294 iattr->ia_valid = 0;
295 if ((status = nfsd4_decode_bitmap(argp, bmval)))
296 return status;
297
1da177e4 298 READ_BUF(4);
06553991 299 expected_len = be32_to_cpup(p++);
1da177e4
LT		 300
301 if (bmval[0] & FATTR4_WORD0_SIZE) {
302 READ_BUF(8);
303 len += 8;
542d1ab3 304 p = xdr_decode_hyper(p, &iattr->ia_size);
1da177e4
LT		 305 iattr->ia_valid |= ATTR_SIZE;
306 }
307 if (bmval[0] & FATTR4_WORD0_ACL) {
64a817cf 308 u32 nace;
28e05dd8 309 struct nfs4_ace *ace;
1da177e4
LT		 310
311 READ_BUF(4); len += 4;
06553991 312 nace = be32_to_cpup(p++);
1da177e4 313
28e05dd8 314 if (nace > NFS4_ACL_MAX)
798df338 315 return nfserr_fbig;
28e05dd8 316
d5e23383 317 *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(nace));
eba1c99c
KM		 318 if (*acl == NULL)
319 return nfserr_jukebox;
320
28e05dd8
BF		 321 (*acl)->naces = nace;
322 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
1da177e4 323 READ_BUF(16); len += 16;
06553991
BF		 324 ace->type = be32_to_cpup(p++);
325 ace->flag = be32_to_cpup(p++);
326 ace->access_mask = be32_to_cpup(p++);
327 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 328 READ_BUF(dummy32);
329 len += XDR_QUADLEN(dummy32) << 2;
330 READMEM(buf, dummy32);
28e05dd8 331 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
3c726023 332 status = nfs_ok;
28e05dd8 333 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ab8e4aee 334 ;
28e05dd8 335 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
3c726023 336 status = nfsd_map_name_to_gid(argp->rqstp,
ab8e4aee 337 buf, dummy32, &ace->who_gid);
1da177e4 338 else
3c726023 339 status = nfsd_map_name_to_uid(argp->rqstp,
ab8e4aee 340 buf, dummy32, &ace->who_uid);
3c726023
BF		 341 if (status)
342 return status;
1da177e4
LT		 343 }
344 } else
345 *acl = NULL;
346 if (bmval[1] & FATTR4_WORD1_MODE) {
347 READ_BUF(4);
348 len += 4;
06553991 349 iattr->ia_mode = be32_to_cpup(p++);
1da177e4
LT		 350 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
351 iattr->ia_valid |= ATTR_MODE;
352 }
353 if (bmval[1] & FATTR4_WORD1_OWNER) {
354 READ_BUF(4);
355 len += 4;
06553991 356 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 357 READ_BUF(dummy32);
358 len += (XDR_QUADLEN(dummy32) << 2);
359 READMEM(buf, dummy32);
47c85291
N		 360 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
361 return status;
1da177e4
LT		 362 iattr->ia_valid |= ATTR_UID;
363 }
364 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
365 READ_BUF(4);
366 len += 4;
06553991 367 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 368 READ_BUF(dummy32);
369 len += (XDR_QUADLEN(dummy32) << 2);
370 READMEM(buf, dummy32);
47c85291
N		 371 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
372 return status;
1da177e4
LT		 373 iattr->ia_valid |= ATTR_GID;
374 }
375 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
376 READ_BUF(4);
377 len += 4;
06553991 378 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 379 switch (dummy32) {
380 case NFS4_SET_TO_CLIENT_TIME:
1da177e4 381 len += 12;
4c94e13e
CH		 382 status = nfsd4_decode_time(argp, &iattr->ia_atime);
383 if (status)
384 return status;
1da177e4
LT		 385 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
386 break;
387 case NFS4_SET_TO_SERVER_TIME:
388 iattr->ia_valid |= ATTR_ATIME;
389 break;
390 default:
391 goto xdr_error;
392 }
393 }
1da177e4
LT		 394 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
395 READ_BUF(4);
396 len += 4;
06553991 397 dummy32 = be32_to_cpup(p++);
1da177e4
LT		 398 switch (dummy32) {
399 case NFS4_SET_TO_CLIENT_TIME:
1da177e4 400 len += 12;
4c94e13e
CH		 401 status = nfsd4_decode_time(argp, &iattr->ia_mtime);
402 if (status)
403 return status;
1da177e4
LT		 404 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
405 break;
406 case NFS4_SET_TO_SERVER_TIME:
407 iattr->ia_valid |= ATTR_MTIME;
408 break;
409 default:
410 goto xdr_error;
411 }
412 }
18032ca0
DQ		 413
414 label->len = 0;
415#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
416 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
417 READ_BUF(4);
418 len += 4;
06553991 419 dummy32 = be32_to_cpup(p++); /* lfs: we don't use it */
18032ca0
DQ		 420 READ_BUF(4);
421 len += 4;
06553991 422 dummy32 = be32_to_cpup(p++); /* pi: we don't use it either */
18032ca0
DQ		 423 READ_BUF(4);
424 len += 4;
06553991 425 dummy32 = be32_to_cpup(p++);
18032ca0 426 READ_BUF(dummy32);
1ec8c0c4 427 if (dummy32 > NFS4_MAXLABELLEN)
18032ca0
DQ		 428 return nfserr_badlabel;
429 len += (XDR_QUADLEN(dummy32) << 2);
430 READMEM(buf, dummy32);
29c353b3
BF		 431 label->len = dummy32;
432 label->data = svcxdr_dupstr(argp, buf, dummy32);
18032ca0
DQ		 433 if (!label->data)
434 return nfserr_jukebox;
18032ca0
DQ		 435 }
436#endif
437
3c8e0316
YZ		 438 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
439 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
440 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
441 READ_BUF(expected_len - len);
442 else if (len != expected_len)
1da177e4
LT		 443 goto xdr_error;
444
445 DECODE_TAIL;
1da177e4
LT		 446}
447
e31a1b66
BH		 448static __be32
449nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
450{
451 DECODE_HEAD;
452
453 READ_BUF(sizeof(stateid_t));
06553991 454 sid->si_generation = be32_to_cpup(p++);
e31a1b66
BH		 455 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
456
457 DECODE_TAIL;
458}
459
b37ad28b 460static __be32
1da177e4
LT		 461nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
462{
463 DECODE_HEAD;
464
465 READ_BUF(4);
06553991 466 access->ac_req_access = be32_to_cpup(p++);
1da177e4
LT		 467
468 DECODE_TAIL;
469}
470
acb2887e
BF		 471static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
472{
473 DECODE_HEAD;
12fc3e92 474 u32 dummy, uid, gid;
acb2887e
BF		 475 char *machine_name;
476 int i;
477 int nr_secflavs;
478
479 /* callback_sec_params4 */
480 READ_BUF(4);
06553991 481 nr_secflavs = be32_to_cpup(p++);
57569a70
BF		 482 if (nr_secflavs)
483 cbs->flavor = (u32)(-1);
484 else
485 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
486 cbs->flavor = 0;
acb2887e
BF		 487 for (i = 0; i < nr_secflavs; ++i) {
488 READ_BUF(4);
06553991 489 dummy = be32_to_cpup(p++);
acb2887e
BF		 490 switch (dummy) {
491 case RPC_AUTH_NULL:
492 /* Nothing to read */
12fc3e92
BF		 493 if (cbs->flavor == (u32)(-1))
494 cbs->flavor = RPC_AUTH_NULL;
acb2887e
BF		 495 break;
496 case RPC_AUTH_UNIX:
497 READ_BUF(8);
498 /* stamp */
06553991 499 dummy = be32_to_cpup(p++);
acb2887e
BF		 500
501 /* machine name */
06553991 502 dummy = be32_to_cpup(p++);
acb2887e
BF		 503 READ_BUF(dummy);
504 SAVEMEM(machine_name, dummy);
505
506 /* uid, gid */
507 READ_BUF(8);
06553991
BF		 508 uid = be32_to_cpup(p++);
509 gid = be32_to_cpup(p++);
acb2887e
BF		 510
511 /* more gids */
512 READ_BUF(4);
06553991 513 dummy = be32_to_cpup(p++);
acb2887e 514 READ_BUF(dummy * 4);
12fc3e92 515 if (cbs->flavor == (u32)(-1)) {
03bc6d1c
EB		 516 kuid_t kuid = make_kuid(&init_user_ns, uid);
517 kgid_t kgid = make_kgid(&init_user_ns, gid);
518 if (uid_valid(kuid) && gid_valid(kgid)) {
519 cbs->uid = kuid;
520 cbs->gid = kgid;
521 cbs->flavor = RPC_AUTH_UNIX;
522 } else {
523 dprintk("RPC_AUTH_UNIX with invalid"
524 "uid or gid ignoring!\n");
525 }
12fc3e92 526 }
acb2887e
BF		 527 break;
528 case RPC_AUTH_GSS:
529 dprintk("RPC_AUTH_GSS callback secflavor "
530 "not supported!\n");
531 READ_BUF(8);
532 /* gcbp_service */
06553991 533 dummy = be32_to_cpup(p++);
acb2887e 534 /* gcbp_handle_from_server */
06553991 535 dummy = be32_to_cpup(p++);
acb2887e
BF		 536 READ_BUF(dummy);
537 p += XDR_QUADLEN(dummy);
538 /* gcbp_handle_from_client */
539 READ_BUF(4);
06553991 540 dummy = be32_to_cpup(p++);
acb2887e
BF		 541 READ_BUF(dummy);
542 break;
543 default:
544 dprintk("Illegal callback secflavor\n");
545 return nfserr_inval;
546 }
547 }
548 DECODE_TAIL;
549}
550
cb73a9f4
BF		 551static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
552{
553 DECODE_HEAD;
554
555 READ_BUF(4);
06553991 556 bc->bc_cb_program = be32_to_cpup(p++);
cb73a9f4
BF		 557 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
558
559 DECODE_TAIL;
560}
561
1d1bc8f2
BF		 562static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
563{
564 DECODE_HEAD;
1d1bc8f2
BF		 565
566 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
567 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
06553991 568 bcts->dir = be32_to_cpup(p++);
6ce2357f
BS		 569 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
570 * could help us figure out we should be using it. */
1d1bc8f2
BF		 571 DECODE_TAIL;
572}
573
b37ad28b 574static __be32
1da177e4
LT		 575nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
576{
577 DECODE_HEAD;
578
e31a1b66 579 READ_BUF(4);
06553991 580 close->cl_seqid = be32_to_cpup(p++);
e31a1b66 581 return nfsd4_decode_stateid(argp, &close->cl_stateid);
1da177e4
LT		 582
583 DECODE_TAIL;
584}
585
586
b37ad28b 587static __be32
1da177e4
LT		 588nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
589{
590 DECODE_HEAD;
591
592 READ_BUF(12);
542d1ab3 593 p = xdr_decode_hyper(p, &commit->co_offset);
06553991 594 commit->co_count = be32_to_cpup(p++);
1da177e4
LT		 595
596 DECODE_TAIL;
597}
598
b37ad28b 599static __be32
1da177e4
LT		 600nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
601{
602 DECODE_HEAD;
603
604 READ_BUF(4);
06553991 605 create->cr_type = be32_to_cpup(p++);
1da177e4
LT		 606 switch (create->cr_type) {
607 case NF4LNK:
608 READ_BUF(4);
7fb84306
BF		 609 create->cr_datalen = be32_to_cpup(p++);
610 READ_BUF(create->cr_datalen);
29c353b3 611 create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen);
7fb84306 612 if (!create->cr_data)
76f47128 613 return nfserr_jukebox;
1da177e4
LT		 614 break;
615 case NF4BLK:
616 case NF4CHR:
617 READ_BUF(8);
06553991
BF		 618 create->cr_specdata1 = be32_to_cpup(p++);
619 create->cr_specdata2 = be32_to_cpup(p++);
1da177e4
LT		 620 break;
621 case NF4SOCK:
622 case NF4FIFO:
623 case NF4DIR:
624 default:
625 break;
626 }
627
628 READ_BUF(4);
06553991 629 create->cr_namelen = be32_to_cpup(p++);
1da177e4
LT		 630 READ_BUF(create->cr_namelen);
631 SAVEMEM(create->cr_name, create->cr_namelen);
a36b1725 632 if ((status = check_filename(create->cr_name, create->cr_namelen)))
1da177e4
LT		 633 return status;
634
3c8e0316 635 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
18032ca0 636 &create->cr_acl, &create->cr_label);
c0d6fc8a 637 if (status)
1da177e4
LT		 638 goto out;
639
640 DECODE_TAIL;
641}
642
b37ad28b 643static inline __be32
1da177e4
LT		 644nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
645{
e31a1b66 646 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
1da177e4
LT		 647}
648
b37ad28b 649static inline __be32
1da177e4
LT		 650nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
651{
652 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
653}
654
b37ad28b 655static __be32
1da177e4
LT		 656nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
657{
658 DECODE_HEAD;
659
660 READ_BUF(4);
06553991 661 link->li_namelen = be32_to_cpup(p++);
1da177e4
LT		 662 READ_BUF(link->li_namelen);
663 SAVEMEM(link->li_name, link->li_namelen);
a36b1725 664 if ((status = check_filename(link->li_name, link->li_namelen)))
1da177e4
LT		 665 return status;
666
667 DECODE_TAIL;
668}
669
b37ad28b 670static __be32
1da177e4
LT		 671nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
672{
673 DECODE_HEAD;
674
1da177e4
LT		 675 /*
676 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
677 */
678 READ_BUF(28);
06553991 679 lock->lk_type = be32_to_cpup(p++);
1da177e4
LT		 680 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
681 goto xdr_error;
06553991 682 lock->lk_reclaim = be32_to_cpup(p++);
542d1ab3
BF		 683 p = xdr_decode_hyper(p, &lock->lk_offset);
684 p = xdr_decode_hyper(p, &lock->lk_length);
06553991 685 lock->lk_is_new = be32_to_cpup(p++);
1da177e4
LT		 686
687 if (lock->lk_is_new) {
e31a1b66 688 READ_BUF(4);
06553991 689 lock->lk_new_open_seqid = be32_to_cpup(p++);
e31a1b66
BH		 690 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
691 if (status)
692 return status;
693 READ_BUF(8 + sizeof(clientid_t));
06553991 694 lock->lk_new_lock_seqid = be32_to_cpup(p++);
1da177e4 695 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
06553991 696 lock->lk_new_owner.len = be32_to_cpup(p++);
1da177e4
LT		 697 READ_BUF(lock->lk_new_owner.len);
698 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
699 } else {
e31a1b66
BH		 700 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
701 if (status)
702 return status;
703 READ_BUF(4);
06553991 704 lock->lk_old_lock_seqid = be32_to_cpup(p++);
1da177e4
LT		 705 }
706
707 DECODE_TAIL;
708}
709
b37ad28b 710static __be32
1da177e4
LT		 711nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
712{
713 DECODE_HEAD;
714
715 READ_BUF(32);
06553991 716 lockt->lt_type = be32_to_cpup(p++);
1da177e4
LT		 717 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
718 goto xdr_error;
542d1ab3
BF		 719 p = xdr_decode_hyper(p, &lockt->lt_offset);
720 p = xdr_decode_hyper(p, &lockt->lt_length);
1da177e4 721 COPYMEM(&lockt->lt_clientid, 8);
06553991 722 lockt->lt_owner.len = be32_to_cpup(p++);
1da177e4
LT		 723 READ_BUF(lockt->lt_owner.len);
724 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
725
726 DECODE_TAIL;
727}
728
b37ad28b 729static __be32
1da177e4
LT		 730nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
731{
732 DECODE_HEAD;
733
e31a1b66 734 READ_BUF(8);
06553991 735 locku->lu_type = be32_to_cpup(p++);
1da177e4
LT		 736 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
737 goto xdr_error;
06553991 738 locku->lu_seqid = be32_to_cpup(p++);
e31a1b66
BH		 739 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
740 if (status)
741 return status;
742 READ_BUF(16);
542d1ab3
BF		 743 p = xdr_decode_hyper(p, &locku->lu_offset);
744 p = xdr_decode_hyper(p, &locku->lu_length);
1da177e4
LT		 745
746 DECODE_TAIL;
747}
748
b37ad28b 749static __be32
1da177e4
LT		 750nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
751{
752 DECODE_HEAD;
753
754 READ_BUF(4);
06553991 755 lookup->lo_len = be32_to_cpup(p++);
1da177e4
LT		 756 READ_BUF(lookup->lo_len);
757 SAVEMEM(lookup->lo_name, lookup->lo_len);
a36b1725 758 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
1da177e4
LT		 759 return status;
760
761 DECODE_TAIL;
762}
763
2c8bd7e0 764static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
04f9e664
BF		 765{
766 __be32 *p;
767 u32 w;
768
769 READ_BUF(4);
06553991 770 w = be32_to_cpup(p++);
2c8bd7e0
BH		 771 *share_access = w & NFS4_SHARE_ACCESS_MASK;
772 *deleg_want = w & NFS4_SHARE_WANT_MASK;
773 if (deleg_when)
774 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
775
04f9e664
BF		 776 switch (w & NFS4_SHARE_ACCESS_MASK) {
777 case NFS4_SHARE_ACCESS_READ:
778 case NFS4_SHARE_ACCESS_WRITE:
779 case NFS4_SHARE_ACCESS_BOTH:
780 break;
781 default:
782 return nfserr_bad_xdr;
783 }
fc0d14fe 784 w &= ~NFS4_SHARE_ACCESS_MASK;
04f9e664
BF		 785 if (!w)
786 return nfs_ok;
787 if (!argp->minorversion)
788 return nfserr_bad_xdr;
789 switch (w & NFS4_SHARE_WANT_MASK) {
790 case NFS4_SHARE_WANT_NO_PREFERENCE:
791 case NFS4_SHARE_WANT_READ_DELEG:
792 case NFS4_SHARE_WANT_WRITE_DELEG:
793 case NFS4_SHARE_WANT_ANY_DELEG:
794 case NFS4_SHARE_WANT_NO_DELEG:
795 case NFS4_SHARE_WANT_CANCEL:
796 break;
797 default:
798 return nfserr_bad_xdr;
799 }
92bac8c5 800 w &= ~NFS4_SHARE_WANT_MASK;
04f9e664
BF		 801 if (!w)
802 return nfs_ok;
2c8bd7e0
BH		 803
804 if (!deleg_when) /* open_downgrade */
805 return nfserr_inval;
04f9e664
BF		 806 switch (w) {
807 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
808 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
c668fc6d
BH		 809 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
810 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
04f9e664
BF		 811 return nfs_ok;
812 }
813xdr_error:
814 return nfserr_bad_xdr;
815}
816
817static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
818{
819 __be32 *p;
820
821 READ_BUF(4);
06553991 822 *x = be32_to_cpup(p++);
04f9e664 823 /* Note: unlinke access bits, deny bits may be zero. */
01cd4afa 824 if (*x & ~NFS4_SHARE_DENY_BOTH)
04f9e664
BF		 825 return nfserr_bad_xdr;
826 return nfs_ok;
827xdr_error:
828 return nfserr_bad_xdr;
829}
830
a084daf5
BF		 831static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
832{
833 __be32 *p;
834
835 READ_BUF(4);
06553991 836 o->len = be32_to_cpup(p++);
a084daf5
BF		 837
838 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
839 return nfserr_bad_xdr;
840
841 READ_BUF(o->len);
842 SAVEMEM(o->data, o->len);
843 return nfs_ok;
844xdr_error:
845 return nfserr_bad_xdr;
846}
847
b37ad28b 848static __be32
1da177e4
LT		 849nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
850{
851 DECODE_HEAD;
2c8bd7e0 852 u32 dummy;
1da177e4
LT		 853
854 memset(open->op_bmval, 0, sizeof(open->op_bmval));
855 open->op_iattr.ia_valid = 0;
fe0750e5 856 open->op_openowner = NULL;
1da177e4 857
9d313b17 858 open->op_xdr_error = 0;
1da177e4 859 /* seqid, share_access, share_deny, clientid, ownerlen */
04f9e664 860 READ_BUF(4);
06553991 861 open->op_seqid = be32_to_cpup(p++);
2c8bd7e0
BH		 862 /* decode, yet ignore deleg_when until supported */
863 status = nfsd4_decode_share_access(argp, &open->op_share_access,
864 &open->op_deleg_want, &dummy);
04f9e664
BF		 865 if (status)
866 goto xdr_error;
867 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
868 if (status)
869 goto xdr_error;
a084daf5 870 READ_BUF(sizeof(clientid_t));
1da177e4 871 COPYMEM(&open->op_clientid, sizeof(clientid_t));
a084daf5
BF		 872 status = nfsd4_decode_opaque(argp, &open->op_owner);
873 if (status)
874 goto xdr_error;
875 READ_BUF(4);
06553991 876 open->op_create = be32_to_cpup(p++);
1da177e4
LT		 877 switch (open->op_create) {
878 case NFS4_OPEN_NOCREATE:
879 break;
880 case NFS4_OPEN_CREATE:
881 READ_BUF(4);
06553991 882 open->op_createmode = be32_to_cpup(p++);
1da177e4
LT		 883 switch (open->op_createmode) {
884 case NFS4_CREATE_UNCHECKED:
885 case NFS4_CREATE_GUARDED:
c0d6fc8a 886 status = nfsd4_decode_fattr(argp, open->op_bmval,
18032ca0 887 &open->op_iattr, &open->op_acl, &open->op_label);
c0d6fc8a 888 if (status)
1da177e4
LT		 889 goto out;
890 break;
891 case NFS4_CREATE_EXCLUSIVE:
ab4684d1
CL		 892 READ_BUF(NFS4_VERIFIER_SIZE);
893 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 894 break;
79fb54ab
BH		 895 case NFS4_CREATE_EXCLUSIVE4_1:
896 if (argp->minorversion < 1)
897 goto xdr_error;
ab4684d1
CL		 898 READ_BUF(NFS4_VERIFIER_SIZE);
899 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
79fb54ab 900 status = nfsd4_decode_fattr(argp, open->op_bmval,
18032ca0 901 &open->op_iattr, &open->op_acl, &open->op_label);
79fb54ab
BH		 902 if (status)
903 goto out;
904 break;
1da177e4
LT		 905 default:
906 goto xdr_error;
907 }
908 break;
909 default:
910 goto xdr_error;
911 }
912
913 /* open_claim */
914 READ_BUF(4);
06553991 915 open->op_claim_type = be32_to_cpup(p++);
1da177e4
LT		 916 switch (open->op_claim_type) {
917 case NFS4_OPEN_CLAIM_NULL:
918 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
919 READ_BUF(4);
06553991 920 open->op_fname.len = be32_to_cpup(p++);
1da177e4
LT		 921 READ_BUF(open->op_fname.len);
922 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 923 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 924 return status;
925 break;
926 case NFS4_OPEN_CLAIM_PREVIOUS:
927 READ_BUF(4);
06553991 928 open->op_delegate_type = be32_to_cpup(p++);
1da177e4
LT		 929 break;
930 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
e31a1b66
BH		 931 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
932 if (status)
933 return status;
934 READ_BUF(4);
06553991 935 open->op_fname.len = be32_to_cpup(p++);
1da177e4
LT		 936 READ_BUF(open->op_fname.len);
937 SAVEMEM(open->op_fname.data, open->op_fname.len);
a36b1725 938 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1da177e4
LT		 939 return status;
940 break;
8b289b2c
BF		 941 case NFS4_OPEN_CLAIM_FH:
942 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
943 if (argp->minorversion < 1)
944 goto xdr_error;
945 /* void */
946 break;
947 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
948 if (argp->minorversion < 1)
949 goto xdr_error;
950 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
951 if (status)
952 return status;
953 break;
1da177e4
LT		 954 default:
955 goto xdr_error;
956 }
957
958 DECODE_TAIL;
959}
960
b37ad28b 961static __be32
1da177e4
LT		 962nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
963{
964 DECODE_HEAD;
e1a90ebd
AS		 965
966 if (argp->minorversion >= 1)
967 return nfserr_notsupp;
968
e31a1b66
BH		 969 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
970 if (status)
971 return status;
972 READ_BUF(4);
06553991 973 open_conf->oc_seqid = be32_to_cpup(p++);
e1a90ebd 974
1da177e4
LT		 975 DECODE_TAIL;
976}
977
b37ad28b 978static __be32
1da177e4
LT		 979nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
980{
981 DECODE_HEAD;
982
e31a1b66
BH		 983 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
984 if (status)
985 return status;
04f9e664 986 READ_BUF(4);
06553991 987 open_down->od_seqid = be32_to_cpup(p++);
2c8bd7e0
BH		 988 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
989 &open_down->od_deleg_want, NULL);
04f9e664
BF		 990 if (status)
991 return status;
992 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
993 if (status)
994 return status;
1da177e4
LT		 995 DECODE_TAIL;
996}
997
b37ad28b 998static __be32
1da177e4
LT		 999nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
1000{
1001 DECODE_HEAD;
1002
1003 READ_BUF(4);
06553991 1004 putfh->pf_fhlen = be32_to_cpup(p++);
1da177e4
LT		 1005 if (putfh->pf_fhlen > NFS4_FHSIZE)
1006 goto xdr_error;
1007 READ_BUF(putfh->pf_fhlen);
1008 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
1009
1010 DECODE_TAIL;
1011}
1012
e1a90ebd
AS		 1013static __be32
1014nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1015{
1016 if (argp->minorversion == 0)
1017 return nfs_ok;
1018 return nfserr_notsupp;
1019}
1020
b37ad28b 1021static __be32
1da177e4
LT		 1022nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1023{
1024 DECODE_HEAD;
1025
e31a1b66
BH		 1026 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
1027 if (status)
1028 return status;
1029 READ_BUF(12);
542d1ab3 1030 p = xdr_decode_hyper(p, &read->rd_offset);
06553991 1031 read->rd_length = be32_to_cpup(p++);
1da177e4
LT		 1032
1033 DECODE_TAIL;
1034}
1035
b37ad28b 1036static __be32
1da177e4
LT		 1037nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1038{
1039 DECODE_HEAD;
1040
1041 READ_BUF(24);
542d1ab3 1042 p = xdr_decode_hyper(p, &readdir->rd_cookie);
1da177e4 1043 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
06553991
BF		 1044 readdir->rd_dircount = be32_to_cpup(p++);
1045 readdir->rd_maxcount = be32_to_cpup(p++);
1da177e4
LT		 1046 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
1047 goto out;
1048
1049 DECODE_TAIL;
1050}
1051
b37ad28b 1052static __be32
1da177e4
LT		 1053nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1054{
1055 DECODE_HEAD;
1056
1057 READ_BUF(4);
06553991 1058 remove->rm_namelen = be32_to_cpup(p++);
1da177e4
LT		 1059 READ_BUF(remove->rm_namelen);
1060 SAVEMEM(remove->rm_name, remove->rm_namelen);
a36b1725 1061 if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
1da177e4
LT		 1062 return status;
1063
1064 DECODE_TAIL;
1065}
1066
b37ad28b 1067static __be32
1da177e4
LT		 1068nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1069{
1070 DECODE_HEAD;
1071
1072 READ_BUF(4);
06553991 1073 rename->rn_snamelen = be32_to_cpup(p++);
1da177e4
LT		 1074 READ_BUF(rename->rn_snamelen + 4);
1075 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
06553991 1076 rename->rn_tnamelen = be32_to_cpup(p++);
1da177e4
LT		 1077 READ_BUF(rename->rn_tnamelen);
1078 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
a36b1725 1079 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
1da177e4 1080 return status;
a36b1725 1081 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
1da177e4
LT		 1082 return status;
1083
1084 DECODE_TAIL;
1085}
1086
b37ad28b 1087static __be32
1da177e4
LT		 1088nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1089{
1090 DECODE_HEAD;
1091
e1a90ebd
AS		 1092 if (argp->minorversion >= 1)
1093 return nfserr_notsupp;
1094
1da177e4
LT		 1095 READ_BUF(sizeof(clientid_t));
1096 COPYMEM(clientid, sizeof(clientid_t));
1097
1098 DECODE_TAIL;
1099}
1100
dcb488a3
AA		 1101static __be32
1102nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1103 struct nfsd4_secinfo *secinfo)
1104{
1105 DECODE_HEAD;
1106
1107 READ_BUF(4);
06553991 1108 secinfo->si_namelen = be32_to_cpup(p++);
dcb488a3
AA		 1109 READ_BUF(secinfo->si_namelen);
1110 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
a36b1725 1111 status = check_filename(secinfo->si_name, secinfo->si_namelen);
dcb488a3
AA		 1112 if (status)
1113 return status;
1114 DECODE_TAIL;
1115}
1116
04f4ad16
BF		 1117static __be32
1118nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1119 struct nfsd4_secinfo_no_name *sin)
1120{
1121 DECODE_HEAD;
1122
1123 READ_BUF(4);
06553991 1124 sin->sin_style = be32_to_cpup(p++);
04f4ad16
BF		 1125 DECODE_TAIL;
1126}
1127
b37ad28b 1128static __be32
1da177e4
LT		 1129nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1130{
e31a1b66 1131 __be32 status;
1da177e4 1132
e31a1b66
BH		 1133 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1134 if (status)
1135 return status;
3c8e0316 1136 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
18032ca0 1137 &setattr->sa_acl, &setattr->sa_label);
1da177e4
LT		 1138}
1139
b37ad28b 1140static __be32
1da177e4
LT		 1141nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1142{
1143 DECODE_HEAD;
1144
e1a90ebd
AS		 1145 if (argp->minorversion >= 1)
1146 return nfserr_notsupp;
1147
ab4684d1
CL		 1148 READ_BUF(NFS4_VERIFIER_SIZE);
1149 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
1da177e4 1150
a084daf5
BF		 1151 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1152 if (status)
1153 return nfserr_bad_xdr;
1154 READ_BUF(8);
06553991
BF		 1155 setclientid->se_callback_prog = be32_to_cpup(p++);
1156 setclientid->se_callback_netid_len = be32_to_cpup(p++);
1da177e4
LT		 1157
1158 READ_BUF(setclientid->se_callback_netid_len + 4);
1159 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
06553991 1160 setclientid->se_callback_addr_len = be32_to_cpup(p++);
1da177e4
LT		 1161
1162 READ_BUF(setclientid->se_callback_addr_len + 4);
1163 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
06553991 1164 setclientid->se_callback_ident = be32_to_cpup(p++);
1da177e4
LT		 1165
1166 DECODE_TAIL;
1167}
1168
b37ad28b 1169static __be32
1da177e4
LT		 1170nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1171{
1172 DECODE_HEAD;
1173
e1a90ebd
AS		 1174 if (argp->minorversion >= 1)
1175 return nfserr_notsupp;
1176
ab4684d1 1177 READ_BUF(8 + NFS4_VERIFIER_SIZE);
1da177e4 1178 COPYMEM(&scd_c->sc_clientid, 8);
ab4684d1 1179 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
1da177e4
LT		 1180
1181 DECODE_TAIL;
1182}
1183
1184/* Also used for NVERIFY */
b37ad28b 1185static __be32
1da177e4
LT		 1186nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1187{
1da177e4
LT		 1188 DECODE_HEAD;
1189
1190 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1191 goto out;
1192
1193 /* For convenience's sake, we compare raw xdr'd attributes in
e5f95703
BF		 1194 * nfsd4_proc_verify */
1195
1da177e4 1196 READ_BUF(4);
06553991 1197 verify->ve_attrlen = be32_to_cpup(p++);
1da177e4
LT		 1198 READ_BUF(verify->ve_attrlen);
1199 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1200
1201 DECODE_TAIL;
1202}
1203
b37ad28b 1204static __be32
1da177e4
LT		 1205nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1206{
1207 int avail;
1da177e4
LT		 1208 int len;
1209 DECODE_HEAD;
1210
e31a1b66
BH		 1211 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1212 if (status)
1213 return status;
1214 READ_BUF(16);
542d1ab3 1215 p = xdr_decode_hyper(p, &write->wr_offset);
06553991 1216 write->wr_stable_how = be32_to_cpup(p++);
1da177e4
LT		 1217 if (write->wr_stable_how > 2)
1218 goto xdr_error;
06553991 1219 write->wr_buflen = be32_to_cpup(p++);
1da177e4
LT		 1220
1221 /* Sorry .. no magic macros for this.. *
1222 * READ_BUF(write->wr_buflen);
1223 * SAVEMEM(write->wr_buf, write->wr_buflen);
1224 */
1225 avail = (char*)argp->end - (char*)argp->p;
1226 if (avail + argp->pagelen < write->wr_buflen) {
817cb9d4
CL		 1227 dprintk("NFSD: xdr error (%s:%d)\n",
1228 __FILE__, __LINE__);
1da177e4
LT		 1229 goto xdr_error;
1230 }
70cc7f75
BF		 1231 write->wr_head.iov_base = p;
1232 write->wr_head.iov_len = avail;
70cc7f75 1233 write->wr_pagelist = argp->pagelist;
5a80a54d
BF		 1234
1235 len = XDR_QUADLEN(write->wr_buflen) << 2;
1236 if (len >= avail) {
1237 int pages;
1238
1239 len -= avail;
1240
1241 pages = len >> PAGE_SHIFT;
1242 argp->pagelist += pages;
1243 argp->pagelen -= pages * PAGE_SIZE;
1244 len -= pages * PAGE_SIZE;
1245
1246 argp->p = (__be32 *)page_address(argp->pagelist[0]);
365da4ad 1247 argp->pagelist++;
5a80a54d 1248 argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE);
1da177e4 1249 }
5a80a54d 1250 argp->p += XDR_QUADLEN(len);
1da177e4
LT		 1251
1252 DECODE_TAIL;
1253}
1254
b37ad28b 1255static __be32
1da177e4
LT		 1256nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1257{
1258 DECODE_HEAD;
1259
e1a90ebd
AS		 1260 if (argp->minorversion >= 1)
1261 return nfserr_notsupp;
1262
1da177e4
LT		 1263 READ_BUF(12);
1264 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
06553991 1265 rlockowner->rl_owner.len = be32_to_cpup(p++);
1da177e4
LT		 1266 READ_BUF(rlockowner->rl_owner.len);
1267 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1268
60adfc50
AA		 1269 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1270 return nfserr_inval;
1da177e4
LT		 1271 DECODE_TAIL;
1272}
1273
2db134eb
AA		 1274static __be32
1275nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
0733d213 1276 struct nfsd4_exchange_id *exid)
2db134eb 1277{
5afa040b 1278 int dummy, tmp;
0733d213
AA		 1279 DECODE_HEAD;
1280
1281 READ_BUF(NFS4_VERIFIER_SIZE);
1282 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1283
a084daf5
BF		 1284 status = nfsd4_decode_opaque(argp, &exid->clname);
1285 if (status)
1286 return nfserr_bad_xdr;
0733d213
AA		 1287
1288 READ_BUF(4);
06553991 1289 exid->flags = be32_to_cpup(p++);
0733d213
AA		 1290
1291 /* Ignore state_protect4_a */
1292 READ_BUF(4);
06553991 1293 exid->spa_how = be32_to_cpup(p++);
0733d213
AA		 1294 switch (exid->spa_how) {
1295 case SP4_NONE:
1296 break;
1297 case SP4_MACH_CRED:
1298 /* spo_must_enforce */
1299 READ_BUF(4);
06553991 1300 dummy = be32_to_cpup(p++);
0733d213
AA		 1301 READ_BUF(dummy * 4);
1302 p += dummy;
1303
1304 /* spo_must_allow */
1305 READ_BUF(4);
06553991 1306 dummy = be32_to_cpup(p++);
0733d213
AA		 1307 READ_BUF(dummy * 4);
1308 p += dummy;
1309 break;
1310 case SP4_SSV:
1311 /* ssp_ops */
1312 READ_BUF(4);
06553991 1313 dummy = be32_to_cpup(p++);
0733d213
AA		 1314 READ_BUF(dummy * 4);
1315 p += dummy;
1316
1317 READ_BUF(4);
06553991 1318 dummy = be32_to_cpup(p++);
0733d213
AA		 1319 READ_BUF(dummy * 4);
1320 p += dummy;
1321
1322 /* ssp_hash_algs<> */
1323 READ_BUF(4);
06553991 1324 tmp = be32_to_cpup(p++);
5afa040b
MJ		 1325 while (tmp--) {
1326 READ_BUF(4);
06553991 1327 dummy = be32_to_cpup(p++);
5afa040b
MJ		 1328 READ_BUF(dummy);
1329 p += XDR_QUADLEN(dummy);
1330 }
0733d213
AA		 1331
1332 /* ssp_encr_algs<> */
1333 READ_BUF(4);
06553991 1334 tmp = be32_to_cpup(p++);
5afa040b
MJ		 1335 while (tmp--) {
1336 READ_BUF(4);
06553991 1337 dummy = be32_to_cpup(p++);
5afa040b
MJ		 1338 READ_BUF(dummy);
1339 p += XDR_QUADLEN(dummy);
1340 }
0733d213
AA		 1341
1342 /* ssp_window and ssp_num_gss_handles */
1343 READ_BUF(8);
06553991
BF		 1344 dummy = be32_to_cpup(p++);
1345 dummy = be32_to_cpup(p++);
0733d213
AA		 1346 break;
1347 default:
1348 goto xdr_error;
1349 }
1350
1351 /* Ignore Implementation ID */
1352 READ_BUF(4); /* nfs_impl_id4 array length */
06553991 1353 dummy = be32_to_cpup(p++);
0733d213
AA		 1354
1355 if (dummy > 1)
1356 goto xdr_error;
1357
1358 if (dummy == 1) {
1359 /* nii_domain */
1360 READ_BUF(4);
06553991 1361 dummy = be32_to_cpup(p++);
0733d213
AA		 1362 READ_BUF(dummy);
1363 p += XDR_QUADLEN(dummy);
1364
1365 /* nii_name */
1366 READ_BUF(4);
06553991 1367 dummy = be32_to_cpup(p++);
0733d213
AA		 1368 READ_BUF(dummy);
1369 p += XDR_QUADLEN(dummy);
1370
1371 /* nii_date */
1372 READ_BUF(12);
1373 p += 3;
1374 }
1375 DECODE_TAIL;
2db134eb
AA		 1376}
1377
1378static __be32
1379nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1380 struct nfsd4_create_session *sess)
1381{
ec6b5d7b 1382 DECODE_HEAD;
ec6b5d7b 1383 u32 dummy;
ec6b5d7b
AA		 1384
1385 READ_BUF(16);
1386 COPYMEM(&sess->clientid, 8);
06553991
BF		 1387 sess->seqid = be32_to_cpup(p++);
1388 sess->flags = be32_to_cpup(p++);
ec6b5d7b
AA		 1389
1390 /* Fore channel attrs */
1391 READ_BUF(28);
06553991
BF		 1392 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1393 sess->fore_channel.maxreq_sz = be32_to_cpup(p++);
1394 sess->fore_channel.maxresp_sz = be32_to_cpup(p++);
1395 sess->fore_channel.maxresp_cached = be32_to_cpup(p++);
1396 sess->fore_channel.maxops = be32_to_cpup(p++);
1397 sess->fore_channel.maxreqs = be32_to_cpup(p++);
1398 sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1399 if (sess->fore_channel.nr_rdma_attrs == 1) {
1400 READ_BUF(4);
06553991 1401 sess->fore_channel.rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1402 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1403 dprintk("Too many fore channel attr bitmaps!\n");
1404 goto xdr_error;
1405 }
1406
1407 /* Back channel attrs */
1408 READ_BUF(28);
06553991
BF		 1409 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1410 sess->back_channel.maxreq_sz = be32_to_cpup(p++);
1411 sess->back_channel.maxresp_sz = be32_to_cpup(p++);
1412 sess->back_channel.maxresp_cached = be32_to_cpup(p++);
1413 sess->back_channel.maxops = be32_to_cpup(p++);
1414 sess->back_channel.maxreqs = be32_to_cpup(p++);
1415 sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1416 if (sess->back_channel.nr_rdma_attrs == 1) {
1417 READ_BUF(4);
06553991 1418 sess->back_channel.rdma_attrs = be32_to_cpup(p++);
ec6b5d7b
AA		 1419 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1420 dprintk("Too many back channel attr bitmaps!\n");
1421 goto xdr_error;
1422 }
1423
acb2887e 1424 READ_BUF(4);
06553991 1425 sess->callback_prog = be32_to_cpup(p++);
acb2887e 1426 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
ec6b5d7b 1427 DECODE_TAIL;
2db134eb
AA		 1428}
1429
1430static __be32
1431nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1432 struct nfsd4_destroy_session *destroy_session)
1433{
e10e0cfc
BH		 1434 DECODE_HEAD;
1435 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1436 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1437
1438 DECODE_TAIL;
2db134eb
AA		 1439}
1440
e1ca12df
BS		 1441static __be32
1442nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1443 struct nfsd4_free_stateid *free_stateid)
1444{
1445 DECODE_HEAD;
1446
1447 READ_BUF(sizeof(stateid_t));
06553991 1448 free_stateid->fr_stateid.si_generation = be32_to_cpup(p++);
e1ca12df
BS		 1449 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1450
1451 DECODE_TAIL;
1452}
1453
2db134eb
AA		 1454static __be32
1455nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1456 struct nfsd4_sequence *seq)
1457{
b85d4c01
BH		 1458 DECODE_HEAD;
1459
1460 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1461 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
06553991
BF		 1462 seq->seqid = be32_to_cpup(p++);
1463 seq->slotid = be32_to_cpup(p++);
1464 seq->maxslots = be32_to_cpup(p++);
1465 seq->cachethis = be32_to_cpup(p++);
b85d4c01
BH		 1466
1467 DECODE_TAIL;
2db134eb
AA		 1468}
1469
17456804
BS		 1470static __be32
1471nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1472{
17456804 1473 int i;
03cfb420
BS		 1474 __be32 *p, status;
1475 struct nfsd4_test_stateid_id *stateid;
17456804
BS		 1476
1477 READ_BUF(4);
1478 test_stateid->ts_num_ids = ntohl(*p++);
1479
03cfb420 1480 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
17456804
BS		 1481
1482 for (i = 0; i < test_stateid->ts_num_ids; i++) {
d5e23383 1483 stateid = svcxdr_tmpalloc(argp, sizeof(*stateid));
03cfb420 1484 if (!stateid) {
afcf6792 1485 status = nfserrno(-ENOMEM);
03cfb420
BS		 1486 goto out;
1487 }
1488
03cfb420
BS		 1489 INIT_LIST_HEAD(&stateid->ts_id_list);
1490 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1491
1492 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
17456804 1493 if (status)
03cfb420 1494 goto out;
17456804
BS		 1495 }
1496
1497 status = 0;
1498out:
1499 return status;
1500xdr_error:
1501 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1502 status = nfserr_bad_xdr;
1503 goto out;
1504}
1505
345c2842
MJ		 1506static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1507{
1508 DECODE_HEAD;
1509
1510 READ_BUF(8);
1511 COPYMEM(&dc->clientid, 8);
1512
1513 DECODE_TAIL;
1514}
1515
4dc6ec00
BF		 1516static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1517{
1518 DECODE_HEAD;
1519
1520 READ_BUF(4);
06553991 1521 rc->rca_one_fs = be32_to_cpup(p++);
4dc6ec00
BF		 1522
1523 DECODE_TAIL;
1524}
1525
9cf514cc
CH		 1526#ifdef CONFIG_NFSD_PNFS
1527static __be32
1528nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp,
1529 struct nfsd4_getdeviceinfo *gdev)
1530{
1531 DECODE_HEAD;
1532 u32 num, i;
1533
1534 READ_BUF(sizeof(struct nfsd4_deviceid) + 3 * 4);
1535 COPYMEM(&gdev->gd_devid, sizeof(struct nfsd4_deviceid));
1536 gdev->gd_layout_type = be32_to_cpup(p++);
1537 gdev->gd_maxcount = be32_to_cpup(p++);
1538 num = be32_to_cpup(p++);
1539 if (num) {
1540 READ_BUF(4 * num);
1541 gdev->gd_notify_types = be32_to_cpup(p++);
1542 for (i = 1; i < num; i++) {
1543 if (be32_to_cpup(p++)) {
1544 status = nfserr_inval;
1545 goto out;
1546 }
1547 }
1548 }
1549 DECODE_TAIL;
1550}
1551
1552static __be32
1553nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp,
1554 struct nfsd4_layoutget *lgp)
1555{
1556 DECODE_HEAD;
1557
1558 READ_BUF(36);
1559 lgp->lg_signal = be32_to_cpup(p++);
1560 lgp->lg_layout_type = be32_to_cpup(p++);
1561 lgp->lg_seg.iomode = be32_to_cpup(p++);
1562 p = xdr_decode_hyper(p, &lgp->lg_seg.offset);
1563 p = xdr_decode_hyper(p, &lgp->lg_seg.length);
1564 p = xdr_decode_hyper(p, &lgp->lg_minlength);
db59c0ef
KM		 1565
1566 status = nfsd4_decode_stateid(argp, &lgp->lg_sid);
1567 if (status)
1568 return status;
1569
9cf514cc
CH		 1570 READ_BUF(4);
1571 lgp->lg_maxcount = be32_to_cpup(p++);
1572
1573 DECODE_TAIL;
1574}
1575
1576static __be32
1577nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp,
1578 struct nfsd4_layoutcommit *lcp)
1579{
1580 DECODE_HEAD;
1581 u32 timechange;
1582
1583 READ_BUF(20);
1584 p = xdr_decode_hyper(p, &lcp->lc_seg.offset);
1585 p = xdr_decode_hyper(p, &lcp->lc_seg.length);
1586 lcp->lc_reclaim = be32_to_cpup(p++);
db59c0ef
KM		 1587
1588 status = nfsd4_decode_stateid(argp, &lcp->lc_sid);
1589 if (status)
1590 return status;
1591
9cf514cc
CH		 1592 READ_BUF(4);
1593 lcp->lc_newoffset = be32_to_cpup(p++);
1594 if (lcp->lc_newoffset) {
1595 READ_BUF(8);
1596 p = xdr_decode_hyper(p, &lcp->lc_last_wr);
1597 } else
1598 lcp->lc_last_wr = 0;
1599 READ_BUF(4);
1600 timechange = be32_to_cpup(p++);
1601 if (timechange) {
1602 status = nfsd4_decode_time(argp, &lcp->lc_mtime);
1603 if (status)
1604 return status;
1605 } else {
1606 lcp->lc_mtime.tv_nsec = UTIME_NOW;
1607 }
1608 READ_BUF(8);
1609 lcp->lc_layout_type = be32_to_cpup(p++);
1610
1611 /*
1612 * Save the layout update in XDR format and let the layout driver deal
1613 * with it later.
1614 */
1615 lcp->lc_up_len = be32_to_cpup(p++);
1616 if (lcp->lc_up_len > 0) {
1617 READ_BUF(lcp->lc_up_len);
1618 READMEM(lcp->lc_up_layout, lcp->lc_up_len);
1619 }
1620
1621 DECODE_TAIL;
1622}
1623
1624static __be32
1625nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp,
1626 struct nfsd4_layoutreturn *lrp)
1627{
1628 DECODE_HEAD;
1629
1630 READ_BUF(16);
1631 lrp->lr_reclaim = be32_to_cpup(p++);
1632 lrp->lr_layout_type = be32_to_cpup(p++);
1633 lrp->lr_seg.iomode = be32_to_cpup(p++);
1634 lrp->lr_return_type = be32_to_cpup(p++);
1635 if (lrp->lr_return_type == RETURN_FILE) {
1636 READ_BUF(16);
1637 p = xdr_decode_hyper(p, &lrp->lr_seg.offset);
1638 p = xdr_decode_hyper(p, &lrp->lr_seg.length);
db59c0ef
KM		 1639
1640 status = nfsd4_decode_stateid(argp, &lrp->lr_sid);
1641 if (status)
1642 return status;
1643
9cf514cc
CH		 1644 READ_BUF(4);
1645 lrp->lrf_body_len = be32_to_cpup(p++);
1646 if (lrp->lrf_body_len > 0) {
1647 READ_BUF(lrp->lrf_body_len);
1648 READMEM(lrp->lrf_body, lrp->lrf_body_len);
1649 }
1650 } else {
1651 lrp->lr_seg.offset = 0;
1652 lrp->lr_seg.length = NFS4_MAX_UINT64;
1653 }
1654
1655 DECODE_TAIL;
1656}
1657#endif /* CONFIG_NFSD_PNFS */
1658
95d871f0
AS		 1659static __be32
1660nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp,
1661 struct nfsd4_fallocate *fallocate)
1662{
1663 DECODE_HEAD;
1664
1665 status = nfsd4_decode_stateid(argp, &fallocate->falloc_stateid);
1666 if (status)
1667 return status;
1668
1669 READ_BUF(16);
1670 p = xdr_decode_hyper(p, &fallocate->falloc_offset);
1671 xdr_decode_hyper(p, &fallocate->falloc_length);
1672
1673 DECODE_TAIL;
1674}
1675
24bab491
AS		 1676static __be32
1677nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek)
1678{
1679 DECODE_HEAD;
1680
1681 status = nfsd4_decode_stateid(argp, &seek->seek_stateid);
1682 if (status)
1683 return status;
1684
1685 READ_BUF(8 + 4);
1686 p = xdr_decode_hyper(p, &seek->seek_offset);
1687 seek->seek_whence = be32_to_cpup(p);
1688
1689 DECODE_TAIL;
1690}
1691
347e0ad9
BH		 1692static __be32
1693nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1694{
1695 return nfs_ok;
1696}
1697
3c375c6f
BH		 1698static __be32
1699nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1700{
1e685ec2 1701 return nfserr_notsupp;
3c375c6f
BH		 1702}
1703
347e0ad9
BH		 1704typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1705
1706static nfsd4_dec nfsd4_dec_ops[] = {
ad1060c8
BF		 1707 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1708 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1709 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1710 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1711 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1712 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1713 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1714 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1715 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1716 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1717 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1718 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1719 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1720 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1721 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1722 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1723 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1724 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1725 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1726 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
e1a90ebd 1727 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
ad1060c8
BF		 1728 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1729 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1730 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1731 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1732 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1733 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1734 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1735 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1736 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1737 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1738 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1739 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1740 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1741 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1742 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1743 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
2db134eb
AA		 1744
1745 /* new operations for NFSv4.1 */
cb73a9f4 1746 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1d1bc8f2 1747 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
9064caae
RD		 1748 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1749 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1750 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
e1ca12df 1751 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
9064caae 1752 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
9cf514cc
CH		 1753#ifdef CONFIG_NFSD_PNFS
1754 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo,
1755 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1756 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit,
1757 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget,
1758 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn,
1759#else
9064caae
RD		 1760 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1761 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1762 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1763 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1764 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
9cf514cc 1765#endif
04f4ad16 1766 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
9064caae
RD		 1767 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1768 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
17456804 1769 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
9064caae 1770 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
345c2842 1771 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
4dc6ec00 1772 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
87a15a80
AS		 1773
1774 /* new operations for NFSv4.2 */
95d871f0 1775 [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
87a15a80
AS		 1776 [OP_COPY] = (nfsd4_dec)nfsd4_decode_notsupp,
1777 [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_notsupp,
b0cb9085 1778 [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
87a15a80
AS		 1779 [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp,
1780 [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp,
1781 [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp,
1782 [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_notsupp,
1783 [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_notsupp,
1784 [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_notsupp,
24bab491 1785 [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek,
87a15a80 1786 [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp,
2db134eb
AA		 1787};
1788
e1a90ebd
AS		 1789static inline bool
1790nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
1791{
8217d146 1792 if (op->opnum < FIRST_NFS4_OP)
e1a90ebd 1793 return false;
8217d146 1794 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
e1a90ebd 1795 return false;
8217d146
AS		 1796 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
1797 return false;
1798 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
e1a90ebd
AS		 1799 return false;
1800 return true;
1801}
f2feb96b 1802
b37ad28b 1803static __be32
1da177e4
LT		 1804nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1805{
1806 DECODE_HEAD;
1807 struct nfsd4_op *op;
1091006c 1808 bool cachethis = false;
a5cddc88
BF		 1809 int auth_slack= argp->rqstp->rq_auth_slack;
1810 int max_reply = auth_slack + 8; /* opcnt, status */
b0e35fda
BF		 1811 int readcount = 0;
1812 int readbytes = 0;
1da177e4
LT		 1813 int i;
1814
1da177e4 1815 READ_BUF(4);
06553991 1816 argp->taglen = be32_to_cpup(p++);
1da177e4
LT		 1817 READ_BUF(argp->taglen + 8);
1818 SAVEMEM(argp->tag, argp->taglen);
06553991
BF		 1819 argp->minorversion = be32_to_cpup(p++);
1820 argp->opcnt = be32_to_cpup(p++);
4f0cefbf 1821 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
1da177e4
LT		 1822
1823 if (argp->taglen > NFSD4_MAX_TAGLEN)
1824 goto xdr_error;
1825 if (argp->opcnt > 100)
1826 goto xdr_error;
1827
e8c96f8c 1828 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
5d6031ca 1829 argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1da177e4
LT		 1830 if (!argp->ops) {
1831 argp->ops = argp->iops;
817cb9d4 1832 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1da177e4
LT		 1833 goto xdr_error;
1834 }
1835 }
1836
e1a90ebd 1837 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
30cff1ff
BH		 1838 argp->opcnt = 0;
1839
1da177e4
LT		 1840 for (i = 0; i < argp->opcnt; i++) {
1841 op = &argp->ops[i];
1842 op->replay = NULL;
1843
8a61b18c 1844 READ_BUF(4);
06553991 1845 op->opnum = be32_to_cpup(p++);
1da177e4 1846
e1a90ebd
AS		 1847 if (nfsd4_opnum_in_range(argp, op))
1848 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
347e0ad9 1849 else {
1da177e4
LT		 1850 op->opnum = OP_ILLEGAL;
1851 op->status = nfserr_op_illegal;
1da177e4 1852 }
1091006c
BF		 1853 /*
1854 * We'll try to cache the result in the DRC if any one
1855 * op in the compound wants to be cached:
1856 */
1857 cachethis |= nfsd4_cache_this_op(op);
6ff40dec 1858
b0e35fda
BF		 1859 if (op->opnum == OP_READ) {
1860 readcount++;
1861 readbytes += nfsd4_max_reply(argp->rqstp, op);
1862 } else
1863 max_reply += nfsd4_max_reply(argp->rqstp, op);
f7b43d0c
BF		 1864 /*
1865 * OP_LOCK may return a conflicting lock. (Special case
1866 * because it will just skip encoding this if it runs
1867 * out of xdr buffer space, and it is the only operation
1868 * that behaves this way.)
1869 */
1870 if (op->opnum == OP_LOCK)
1871 max_reply += NFS4_OPAQUE_LIMIT;
e372ba60
BF		 1872
1873 if (op->status) {
1874 argp->opcnt = i+1;
1875 break;
1876 }
1da177e4 1877 }
1091006c
BF		 1878 /* Sessions make the DRC unnecessary: */
1879 if (argp->minorversion)
1880 cachethis = false;
b0e35fda 1881 svc_reserve(argp->rqstp, max_reply + readbytes);
1091006c 1882 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1da177e4 1883
a5cddc88 1884 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
779fb0f3 1885 clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags);
b0e35fda 1886
1da177e4
LT		 1887 DECODE_TAIL;
1888}
1da177e4 1889
d05d5744 1890static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode)
c654b8a9
BF		 1891{
1892 if (IS_I_VERSION(inode)) {
d05d5744 1893 p = xdr_encode_hyper(p, inode->i_version);
c654b8a9 1894 } else {
d05d5744
BF		 1895 *p++ = cpu_to_be32(stat->ctime.tv_sec);
1896 *p++ = cpu_to_be32(stat->ctime.tv_nsec);
c654b8a9 1897 }
d05d5744 1898 return p;
c654b8a9
BF		 1899}
1900
d05d5744 1901static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
c654b8a9 1902{
d05d5744 1903 *p++ = cpu_to_be32(c->atomic);
c654b8a9 1904 if (c->change_supported) {
d05d5744
BF		 1905 p = xdr_encode_hyper(p, c->before_change);
1906 p = xdr_encode_hyper(p, c->after_change);
c654b8a9 1907 } else {
d05d5744
BF		 1908 *p++ = cpu_to_be32(c->before_ctime_sec);
1909 *p++ = cpu_to_be32(c->before_ctime_nsec);
1910 *p++ = cpu_to_be32(c->after_ctime_sec);
1911 *p++ = cpu_to_be32(c->after_ctime_nsec);
c654b8a9 1912 }
d05d5744 1913 return p;
c654b8a9 1914}
1da177e4 1915
81c3f413 1916/* Encode as an array of strings the string given with components
e7a0444a 1917 * separated @sep, escaped with esc_enter and esc_exit.
81c3f413 1918 */
ddd1ea56
BF		 1919static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
1920 char *components, char esc_enter,
1921 char esc_exit)
81c3f413 1922{
ddd1ea56 1923 __be32 *p;
082d4bd7
BF		 1924 __be32 pathlen;
1925 int pathlen_offset;
81c3f413 1926 int strlen, count=0;
e7a0444a 1927 char *str, *end, *next;
81c3f413
BF		 1928
1929 dprintk("nfsd4_encode_components(%s)\n", components);
082d4bd7
BF		 1930
1931 pathlen_offset = xdr->buf->len;
ddd1ea56
BF		 1932 p = xdr_reserve_space(xdr, 4);
1933 if (!p)
81c3f413 1934 return nfserr_resource;
082d4bd7
BF		 1935 p++; /* We will fill this in with @count later */
1936
81c3f413
BF		 1937 end = str = components;
1938 while (*end) {
e7a0444a
WAA		 1939 bool found_esc = false;
1940
1941 /* try to parse as esc_start, ..., esc_end, sep */
1942 if (*str == esc_enter) {
1943 for (; *end && (*end != esc_exit); end++)
1944 /* find esc_exit or end of string */;
1945 next = end + 1;
1946 if (*end && (!*next || *next == sep)) {
1947 str++;
1948 found_esc = true;
1949 }
1950 }
1951
1952 if (!found_esc)
1953 for (; *end && (*end != sep); end++)
1954 /* find sep or end of string */;
1955
81c3f413
BF		 1956 strlen = end - str;
1957 if (strlen) {
ddd1ea56
BF		 1958 p = xdr_reserve_space(xdr, strlen + 4);
1959 if (!p)
81c3f413 1960 return nfserr_resource;
0c0c267b 1961 p = xdr_encode_opaque(p, str, strlen);
81c3f413
BF		 1962 count++;
1963 }
1964 else
1965 end++;
5a64e569
BC		 1966 if (found_esc)
1967 end = next;
1968
81c3f413
BF		 1969 str = end;
1970 }
bf7491f1 1971 pathlen = htonl(count);
082d4bd7 1972 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
81c3f413
BF		 1973 return 0;
1974}
1975
e7a0444a
WAA		 1976/* Encode as an array of strings the string given with components
1977 * separated @sep.
1978 */
ddd1ea56
BF		 1979static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
1980 char *components)
e7a0444a 1981{
ddd1ea56 1982 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
e7a0444a
WAA		 1983}
1984
81c3f413
BF		 1985/*
1986 * encode a location element of a fs_locations structure
1987 */
ddd1ea56
BF		 1988static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
1989 struct nfsd4_fs_location *location)
81c3f413 1990{
b37ad28b 1991 __be32 status;
81c3f413 1992
ddd1ea56 1993 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
e7a0444a 1994 '[', ']');
81c3f413
BF		 1995 if (status)
1996 return status;
ddd1ea56 1997 status = nfsd4_encode_components(xdr, '/', location->path);
81c3f413
BF		 1998 if (status)
1999 return status;
81c3f413
BF		 2000 return 0;
2001}
2002
2003/*
ed748aac 2004 * Encode a path in RFC3530 'pathname4' format
81c3f413 2005 */
ddd1ea56
BF		 2006static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
2007 const struct path *root,
2008 const struct path *path)
81c3f413 2009{
301f0268 2010 struct path cur = *path;
ddd1ea56 2011 __be32 *p;
ed748aac
TM		 2012 struct dentry **components = NULL;
2013 unsigned int ncomponents = 0;
2014 __be32 err = nfserr_jukebox;
81c3f413 2015
ed748aac 2016 dprintk("nfsd4_encode_components(");
81c3f413 2017
ed748aac
TM		 2018 path_get(&cur);
2019 /* First walk the path up to the nfsd root, and store the
2020 * dentries/path components in an array.
2021 */
2022 for (;;) {
b77a4b2e 2023 if (path_equal(&cur, root))
ed748aac
TM		 2024 break;
2025 if (cur.dentry == cur.mnt->mnt_root) {
2026 if (follow_up(&cur))
2027 continue;
2028 goto out_free;
2029 }
2030 if ((ncomponents & 15) == 0) {
2031 struct dentry **new;
2032 new = krealloc(components,
2033 sizeof(*new) * (ncomponents + 16),
2034 GFP_KERNEL);
2035 if (!new)
2036 goto out_free;
2037 components = new;
2038 }
2039 components[ncomponents++] = cur.dentry;
2040 cur.dentry = dget_parent(cur.dentry);
2041 }
ddd1ea56
BF		 2042 err = nfserr_resource;
2043 p = xdr_reserve_space(xdr, 4);
2044 if (!p)
ed748aac 2045 goto out_free;
c373b0a4 2046 *p++ = cpu_to_be32(ncomponents);
ed748aac
TM		 2047
2048 while (ncomponents) {
2049 struct dentry *dentry = components[ncomponents - 1];
301f0268 2050 unsigned int len;
ed748aac 2051
301f0268
AV		 2052 spin_lock(&dentry->d_lock);
2053 len = dentry->d_name.len;
ddd1ea56
BF		 2054 p = xdr_reserve_space(xdr, len + 4);
2055 if (!p) {
301f0268 2056 spin_unlock(&dentry->d_lock);
ed748aac 2057 goto out_free;
301f0268 2058 }
0c0c267b 2059 p = xdr_encode_opaque(p, dentry->d_name.name, len);
a455589f 2060 dprintk("/%pd", dentry);
301f0268 2061 spin_unlock(&dentry->d_lock);
ed748aac
TM		 2062 dput(dentry);
2063 ncomponents--;
81c3f413 2064 }
ed748aac 2065
ed748aac
TM		 2066 err = 0;
2067out_free:
2068 dprintk(")\n");
2069 while (ncomponents)
2070 dput(components[--ncomponents]);
2071 kfree(components);
2072 path_put(&cur);
2073 return err;
2074}
2075
ddd1ea56
BF		 2076static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
2077 struct svc_rqst *rqstp, const struct path *path)
ed748aac
TM		 2078{
2079 struct svc_export *exp_ps;
2080 __be32 res;
2081
2082 exp_ps = rqst_find_fsidzero_export(rqstp);
2083 if (IS_ERR(exp_ps))
2084 return nfserrno(PTR_ERR(exp_ps));
ddd1ea56 2085 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
ed748aac
TM		 2086 exp_put(exp_ps);
2087 return res;
81c3f413
BF		 2088}
2089
2090/*
2091 * encode a fs_locations structure
2092 */
ddd1ea56
BF		 2093static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
2094 struct svc_rqst *rqstp, struct svc_export *exp)
81c3f413 2095{
b37ad28b 2096 __be32 status;
cc45f017 2097 int i;
ddd1ea56 2098 __be32 *p;
81c3f413 2099 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
81c3f413 2100
ddd1ea56 2101 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
81c3f413
BF		 2102 if (status)
2103 return status;
ddd1ea56
BF		 2104 p = xdr_reserve_space(xdr, 4);
2105 if (!p)
81c3f413 2106 return nfserr_resource;
c373b0a4 2107 *p++ = cpu_to_be32(fslocs->locations_count);
81c3f413 2108 for (i=0; i<fslocs->locations_count; i++) {
ddd1ea56 2109 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
81c3f413
BF		 2110 if (status)
2111 return status;
2112 }
81c3f413
BF		 2113 return 0;
2114}
1da177e4 2115
3d2544b1
BF		 2116static u32 nfs4_file_type(umode_t mode)
2117{
2118 switch (mode & S_IFMT) {
2119 case S_IFIFO: return NF4FIFO;
2120 case S_IFCHR: return NF4CHR;
2121 case S_IFDIR: return NF4DIR;
2122 case S_IFBLK: return NF4BLK;
2123 case S_IFLNK: return NF4LNK;
2124 case S_IFREG: return NF4REG;
2125 case S_IFSOCK: return NF4SOCK;
2126 default: return NF4BAD;
2127 };
2128}
1da177e4 2129
b37ad28b 2130static inline __be32
ddd1ea56
BF		 2131nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2132 struct nfs4_ace *ace)
1da177e4 2133{
3554116d 2134 if (ace->whotype != NFS4_ACL_WHO_NAMED)
ddd1ea56 2135 return nfs4_acl_write_who(xdr, ace->whotype);
3554116d 2136 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
ddd1ea56 2137 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
3554116d 2138 else
ddd1ea56 2139 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
1da177e4
LT		 2140}
2141
42ca0993
BF		 2142#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
2143 FATTR4_WORD0_RDATTR_ERROR)
2144#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
2145
18032ca0
DQ		 2146#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2147static inline __be32
ddd1ea56
BF		 2148nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2149 void *context, int len)
18032ca0 2150{
ddd1ea56 2151 __be32 *p;
18032ca0 2152
ddd1ea56
BF		 2153 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
2154 if (!p)
18032ca0
DQ		 2155 return nfserr_resource;
2156
2157 /*
2158 * For now we use a 0 here to indicate the null translation; in
2159 * the future we may place a call to translation code here.
2160 */
c373b0a4
BF		 2161 *p++ = cpu_to_be32(0); /* lfs */
2162 *p++ = cpu_to_be32(0); /* pi */
18032ca0 2163 p = xdr_encode_opaque(p, context, len);
18032ca0
DQ		 2164 return 0;
2165}
2166#else
2167static inline __be32
ddd1ea56
BF		 2168nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2169 void *context, int len)
18032ca0
DQ		 2170{ return 0; }
2171#endif
2172
b37ad28b 2173static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
42ca0993
BF		 2174{
2175 /* As per referral draft: */
2176 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2177 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2178 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2179 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2180 *rdattr_err = NFSERR_MOVED;
2181 else
2182 return nfserr_moved;
2183 }
2184 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2185 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
2186 return 0;
2187}
1da177e4 2188
ae7095a7
BF		 2189
2190static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2191{
2192 struct path path = exp->ex_path;
2193 int err;
2194
2195 path_get(&path);
2196 while (follow_up(&path)) {
2197 if (path.dentry != path.mnt->mnt_root)
2198 break;
2199 }
3dadecce 2200 err = vfs_getattr(&path, stat);
ae7095a7
BF		 2201 path_put(&path);
2202 return err;
2203}
2204
1da177e4
LT		 2205/*
2206 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2207 * ourselves.
1da177e4 2208 */
da2ebce6 2209static __be32
d5184658
BF		 2210nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2211 struct svc_export *exp,
2212 struct dentry *dentry, u32 *bmval,
406a7ea9 2213 struct svc_rqst *rqstp, int ignore_crossmnt)
1da177e4
LT		 2214{
2215 u32 bmval0 = bmval[0];
2216 u32 bmval1 = bmval[1];
7e705706 2217 u32 bmval2 = bmval[2];
1da177e4 2218 struct kstat stat;
d50e6136 2219 struct svc_fh *tempfh = NULL;
1da177e4 2220 struct kstatfs statfs;
ddd1ea56 2221 __be32 *p;
1fcea5b2 2222 int starting_len = xdr->buf->len;
082d4bd7
BF		 2223 int attrlen_offset;
2224 __be32 attrlen;
1da177e4
LT		 2225 u32 dummy;
2226 u64 dummy64;
42ca0993 2227 u32 rdattr_err = 0;
b37ad28b 2228 __be32 status;
b8dd7b9a 2229 int err;
1da177e4 2230 struct nfs4_acl *acl = NULL;
18032ca0
DQ		 2231 void *context = NULL;
2232 int contextlen;
2233 bool contextsupport = false;
7e705706
AA		 2234 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2235 u32 minorversion = resp->cstate.minorversion;
ebabe9a9
CH		 2236 struct path path = {
2237 .mnt = exp->ex_path.mnt,
2238 .dentry = dentry,
2239 };
3d733711 2240 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1da177e4
LT		 2241
2242 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
7e705706
AA		 2243 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
2244 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
2245 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
1da177e4 2246
42ca0993 2247 if (exp->ex_fslocs.migrated) {
7e705706 2248 BUG_ON(bmval[2]);
42ca0993
BF		 2249 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
2250 if (status)
2251 goto out;
2252 }
2253
3dadecce 2254 err = vfs_getattr(&path, &stat);
b8dd7b9a 2255 if (err)
1da177e4 2256 goto out_nfserr;
12337901
CH		 2257 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2258 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
1da177e4
LT		 2259 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2260 FATTR4_WORD1_SPACE_TOTAL))) {
ebabe9a9 2261 err = vfs_statfs(&path, &statfs);
b8dd7b9a 2262 if (err)
1da177e4
LT		 2263 goto out_nfserr;
2264 }
2265 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
d50e6136
BF		 2266 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2267 status = nfserr_jukebox;
2268 if (!tempfh)
2269 goto out;
2270 fh_init(tempfh, NFS4_FHSIZE);
2271 status = fh_compose(tempfh, exp, dentry, NULL);
1da177e4
LT		 2272 if (status)
2273 goto out;
d50e6136 2274 fhp = tempfh;
1da177e4 2275 }
0c9d65e7 2276 if (bmval0 & FATTR4_WORD0_ACL) {
b8dd7b9a 2277 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
0c9d65e7
AG		 2278 if (err == -EOPNOTSUPP)
2279 bmval0 &= ~FATTR4_WORD0_ACL;
2280 else if (err == -EINVAL) {
2281 status = nfserr_attrnotsupp;
2282 goto out;
2283 } else if (err != 0)
2284 goto out_nfserr;
1da177e4 2285 }
1da177e4 2286
18032ca0
DQ		 2287#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2288 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) ||
2289 bmval[0] & FATTR4_WORD0_SUPPORTED_ATTRS) {
2b0143b5 2290 err = security_inode_getsecctx(d_inode(dentry),
18032ca0
DQ		 2291 &context, &contextlen);
2292 contextsupport = (err == 0);
2293 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2294 if (err == -EOPNOTSUPP)
2295 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2296 else if (err)
2297 goto out_nfserr;
2298 }
2299 }
2300#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2301
2b44f1ba 2302 if (bmval2) {
ddd1ea56
BF		 2303 p = xdr_reserve_space(xdr, 16);
2304 if (!p)
2b44f1ba 2305 goto out_resource;
c373b0a4
BF		 2306 *p++ = cpu_to_be32(3);
2307 *p++ = cpu_to_be32(bmval0);
2308 *p++ = cpu_to_be32(bmval1);
2309 *p++ = cpu_to_be32(bmval2);
2b44f1ba 2310 } else if (bmval1) {
ddd1ea56
BF		 2311 p = xdr_reserve_space(xdr, 12);
2312 if (!p)
2b44f1ba 2313 goto out_resource;
c373b0a4
BF		 2314 *p++ = cpu_to_be32(2);
2315 *p++ = cpu_to_be32(bmval0);
2316 *p++ = cpu_to_be32(bmval1);
7e705706 2317 } else {
ddd1ea56
BF		 2318 p = xdr_reserve_space(xdr, 8);
2319 if (!p)
2b44f1ba 2320 goto out_resource;
c373b0a4
BF		 2321 *p++ = cpu_to_be32(1);
2322 *p++ = cpu_to_be32(bmval0);
7e705706 2323 }
082d4bd7
BF		 2324
2325 attrlen_offset = xdr->buf->len;
ddd1ea56
BF		 2326 p = xdr_reserve_space(xdr, 4);
2327 if (!p)
2328 goto out_resource;
082d4bd7 2329 p++; /* to be backfilled later */
1da177e4
LT		 2330
2331 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
7e705706
AA		 2332 u32 word0 = nfsd_suppattrs0(minorversion);
2333 u32 word1 = nfsd_suppattrs1(minorversion);
2334 u32 word2 = nfsd_suppattrs2(minorversion);
2335
0c9d65e7 2336 if (!IS_POSIXACL(dentry->d_inode))
42ca0993 2337 word0 &= ~FATTR4_WORD0_ACL;
18032ca0
DQ		 2338 if (!contextsupport)
2339 word2 &= ~FATTR4_WORD2_SECURITY_LABEL;
7e705706 2340 if (!word2) {
ddd1ea56
BF		 2341 p = xdr_reserve_space(xdr, 12);
2342 if (!p)
2b44f1ba 2343 goto out_resource;
c373b0a4
BF		 2344 *p++ = cpu_to_be32(2);
2345 *p++ = cpu_to_be32(word0);
2346 *p++ = cpu_to_be32(word1);
7e705706 2347 } else {
ddd1ea56
BF		 2348 p = xdr_reserve_space(xdr, 16);
2349 if (!p)
2b44f1ba 2350 goto out_resource;
c373b0a4
BF		 2351 *p++ = cpu_to_be32(3);
2352 *p++ = cpu_to_be32(word0);
2353 *p++ = cpu_to_be32(word1);
2354 *p++ = cpu_to_be32(word2);
7e705706 2355 }
1da177e4
LT		 2356 }
2357 if (bmval0 & FATTR4_WORD0_TYPE) {
ddd1ea56
BF		 2358 p = xdr_reserve_space(xdr, 4);
2359 if (!p)
1da177e4 2360 goto out_resource;
3d2544b1 2361 dummy = nfs4_file_type(stat.mode);
6b6d8137
BF		 2362 if (dummy == NF4BAD) {
2363 status = nfserr_serverfault;
2364 goto out;
2365 }
c373b0a4 2366 *p++ = cpu_to_be32(dummy);
1da177e4
LT		 2367 }
2368 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
ddd1ea56
BF		 2369 p = xdr_reserve_space(xdr, 4);
2370 if (!p)
1da177e4 2371 goto out_resource;
49640001 2372 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
c373b0a4 2373 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
49640001 2374 else
c373b0a4
BF		 2375 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2376 NFS4_FH_VOL_RENAME);
1da177e4
LT		 2377 }
2378 if (bmval0 & FATTR4_WORD0_CHANGE) {
ddd1ea56
BF		 2379 p = xdr_reserve_space(xdr, 8);
2380 if (!p)
1da177e4 2381 goto out_resource;
2b0143b5 2382 p = encode_change(p, &stat, d_inode(dentry));
1da177e4
LT		 2383 }
2384 if (bmval0 & FATTR4_WORD0_SIZE) {
ddd1ea56
BF		 2385 p = xdr_reserve_space(xdr, 8);
2386 if (!p)
1da177e4 2387 goto out_resource;
b64c7f3b 2388 p = xdr_encode_hyper(p, stat.size);
1da177e4
LT		 2389 }
2390 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
ddd1ea56
BF		 2391 p = xdr_reserve_space(xdr, 4);
2392 if (!p)
1da177e4 2393 goto out_resource;
c373b0a4 2394 *p++ = cpu_to_be32(1);
1da177e4
LT		 2395 }
2396 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
ddd1ea56
BF		 2397 p = xdr_reserve_space(xdr, 4);
2398 if (!p)
1da177e4 2399 goto out_resource;
c373b0a4 2400 *p++ = cpu_to_be32(1);
1da177e4
LT		 2401 }
2402 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
ddd1ea56
BF		 2403 p = xdr_reserve_space(xdr, 4);
2404 if (!p)
1da177e4 2405 goto out_resource;
c373b0a4 2406 *p++ = cpu_to_be32(0);
1da177e4
LT		 2407 }
2408 if (bmval0 & FATTR4_WORD0_FSID) {
ddd1ea56
BF		 2409 p = xdr_reserve_space(xdr, 16);
2410 if (!p)
1da177e4 2411 goto out_resource;
42ca0993 2412 if (exp->ex_fslocs.migrated) {
b64c7f3b
BF		 2413 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
2414 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
af6a4e28
N		 2415 } else switch(fsid_source(fhp)) {
2416 case FSIDSOURCE_FSID:
b64c7f3b
BF		 2417 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
2418 p = xdr_encode_hyper(p, (u64)0);
af6a4e28
N		 2419 break;
2420 case FSIDSOURCE_DEV:
c373b0a4
BF		 2421 *p++ = cpu_to_be32(0);
2422 *p++ = cpu_to_be32(MAJOR(stat.dev));
2423 *p++ = cpu_to_be32(0);
2424 *p++ = cpu_to_be32(MINOR(stat.dev));
af6a4e28
N		 2425 break;
2426 case FSIDSOURCE_UUID:
94eb3689
KM		 2427 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
2428 EX_UUID_LEN);
af6a4e28 2429 break;
1da177e4
LT		 2430 }
2431 }
2432 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
ddd1ea56
BF		 2433 p = xdr_reserve_space(xdr, 4);
2434 if (!p)
1da177e4 2435 goto out_resource;
c373b0a4 2436 *p++ = cpu_to_be32(0);
1da177e4
LT		 2437 }
2438 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
ddd1ea56
BF		 2439 p = xdr_reserve_space(xdr, 4);
2440 if (!p)
1da177e4 2441 goto out_resource;
c373b0a4 2442 *p++ = cpu_to_be32(nn->nfsd4_lease);
1da177e4
LT		 2443 }
2444 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
ddd1ea56
BF		 2445 p = xdr_reserve_space(xdr, 4);
2446 if (!p)
1da177e4 2447 goto out_resource;
c373b0a4 2448 *p++ = cpu_to_be32(rdattr_err);
1da177e4
LT		 2449 }
2450 if (bmval0 & FATTR4_WORD0_ACL) {
2451 struct nfs4_ace *ace;
1da177e4
LT		 2452
2453 if (acl == NULL) {
ddd1ea56
BF		 2454 p = xdr_reserve_space(xdr, 4);
2455 if (!p)
1da177e4
LT		 2456 goto out_resource;
2457
c373b0a4 2458 *p++ = cpu_to_be32(0);
1da177e4
LT		 2459 goto out_acl;
2460 }
ddd1ea56
BF		 2461 p = xdr_reserve_space(xdr, 4);
2462 if (!p)
1da177e4 2463 goto out_resource;
c373b0a4 2464 *p++ = cpu_to_be32(acl->naces);
1da177e4 2465
28e05dd8 2466 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
ddd1ea56
BF		 2467 p = xdr_reserve_space(xdr, 4*3);
2468 if (!p)
1da177e4 2469 goto out_resource;
c373b0a4
BF		 2470 *p++ = cpu_to_be32(ace->type);
2471 *p++ = cpu_to_be32(ace->flag);
2472 *p++ = cpu_to_be32(ace->access_mask &
2473 NFS4_ACE_MASK_ALL);
ddd1ea56 2474 status = nfsd4_encode_aclname(xdr, rqstp, ace);
1da177e4
LT		 2475 if (status)
2476 goto out;
2477 }
2478 }
2479out_acl:
2480 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
ddd1ea56
BF		 2481 p = xdr_reserve_space(xdr, 4);
2482 if (!p)
1da177e4 2483 goto out_resource;
0c9d65e7 2484 *p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ?
1da177e4
LT		 2485 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2486 }
2487 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
ddd1ea56
BF		 2488 p = xdr_reserve_space(xdr, 4);
2489 if (!p)
1da177e4 2490 goto out_resource;
c373b0a4 2491 *p++ = cpu_to_be32(1);
1da177e4
LT		 2492 }
2493 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
ddd1ea56
BF		 2494 p = xdr_reserve_space(xdr, 4);
2495 if (!p)
1da177e4 2496 goto out_resource;
c373b0a4 2497 *p++ = cpu_to_be32(0);
1da177e4
LT		 2498 }
2499 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
ddd1ea56
BF		 2500 p = xdr_reserve_space(xdr, 4);
2501 if (!p)
1da177e4 2502 goto out_resource;
c373b0a4 2503 *p++ = cpu_to_be32(1);
1da177e4
LT		 2504 }
2505 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
ddd1ea56
BF		 2506 p = xdr_reserve_space(xdr, 4);
2507 if (!p)
1da177e4 2508 goto out_resource;
c373b0a4 2509 *p++ = cpu_to_be32(1);
1da177e4
LT		 2510 }
2511 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
ddd1ea56
BF		 2512 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
2513 if (!p)
1da177e4 2514 goto out_resource;
0c0c267b
BF		 2515 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
2516 fhp->fh_handle.fh_size);
1da177e4
LT		 2517 }
2518 if (bmval0 & FATTR4_WORD0_FILEID) {
ddd1ea56
BF		 2519 p = xdr_reserve_space(xdr, 8);
2520 if (!p)
1da177e4 2521 goto out_resource;
b64c7f3b 2522 p = xdr_encode_hyper(p, stat.ino);
1da177e4
LT		 2523 }
2524 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
ddd1ea56
BF		 2525 p = xdr_reserve_space(xdr, 8);
2526 if (!p)
1da177e4 2527 goto out_resource;
b64c7f3b 2528 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 2529 }
2530 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
ddd1ea56
BF		 2531 p = xdr_reserve_space(xdr, 8);
2532 if (!p)
1da177e4 2533 goto out_resource;
b64c7f3b 2534 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
1da177e4
LT		 2535 }
2536 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
ddd1ea56
BF		 2537 p = xdr_reserve_space(xdr, 8);
2538 if (!p)
1da177e4 2539 goto out_resource;
b64c7f3b 2540 p = xdr_encode_hyper(p, (u64) statfs.f_files);
1da177e4 2541 }
81c3f413 2542 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
ddd1ea56 2543 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
81c3f413
BF		 2544 if (status)
2545 goto out;
2546 }
1da177e4 2547 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
ddd1ea56
BF		 2548 p = xdr_reserve_space(xdr, 4);
2549 if (!p)
1da177e4 2550 goto out_resource;
c373b0a4 2551 *p++ = cpu_to_be32(1);
1da177e4
LT		 2552 }
2553 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
ddd1ea56
BF		 2554 p = xdr_reserve_space(xdr, 8);
2555 if (!p)
1da177e4 2556 goto out_resource;
b64c7f3b 2557 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
1da177e4
LT		 2558 }
2559 if (bmval0 & FATTR4_WORD0_MAXLINK) {
ddd1ea56
BF		 2560 p = xdr_reserve_space(xdr, 4);
2561 if (!p)
1da177e4 2562 goto out_resource;
c373b0a4 2563 *p++ = cpu_to_be32(255);
1da177e4
LT		 2564 }
2565 if (bmval0 & FATTR4_WORD0_MAXNAME) {
ddd1ea56
BF		 2566 p = xdr_reserve_space(xdr, 4);
2567 if (!p)
1da177e4 2568 goto out_resource;
c373b0a4 2569 *p++ = cpu_to_be32(statfs.f_namelen);
1da177e4
LT		 2570 }
2571 if (bmval0 & FATTR4_WORD0_MAXREAD) {
ddd1ea56
BF		 2572 p = xdr_reserve_space(xdr, 8);
2573 if (!p)
1da177e4 2574 goto out_resource;
b64c7f3b 2575 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
1da177e4
LT		 2576 }
2577 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
ddd1ea56
BF		 2578 p = xdr_reserve_space(xdr, 8);
2579 if (!p)
1da177e4 2580 goto out_resource;
b64c7f3b 2581 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
1da177e4
LT		 2582 }
2583 if (bmval1 & FATTR4_WORD1_MODE) {
ddd1ea56
BF		 2584 p = xdr_reserve_space(xdr, 4);
2585 if (!p)
1da177e4 2586 goto out_resource;
c373b0a4 2587 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
1da177e4
LT		 2588 }
2589 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
ddd1ea56
BF		 2590 p = xdr_reserve_space(xdr, 4);
2591 if (!p)
1da177e4 2592 goto out_resource;
c373b0a4 2593 *p++ = cpu_to_be32(1);
1da177e4
LT		 2594 }
2595 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
ddd1ea56
BF		 2596 p = xdr_reserve_space(xdr, 4);
2597 if (!p)
1da177e4 2598 goto out_resource;
c373b0a4 2599 *p++ = cpu_to_be32(stat.nlink);
1da177e4
LT		 2600 }
2601 if (bmval1 & FATTR4_WORD1_OWNER) {
ddd1ea56 2602 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
1da177e4
LT		 2603 if (status)
2604 goto out;
2605 }
2606 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
ddd1ea56 2607 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
1da177e4
LT		 2608 if (status)
2609 goto out;
2610 }
2611 if (bmval1 & FATTR4_WORD1_RAWDEV) {
ddd1ea56
BF		 2612 p = xdr_reserve_space(xdr, 8);
2613 if (!p)
1da177e4 2614 goto out_resource;
c373b0a4
BF		 2615 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
2616 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
1da177e4
LT		 2617 }
2618 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
ddd1ea56
BF		 2619 p = xdr_reserve_space(xdr, 8);
2620 if (!p)
1da177e4
LT		 2621 goto out_resource;
2622 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
b64c7f3b 2623 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2624 }
2625 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
ddd1ea56
BF		 2626 p = xdr_reserve_space(xdr, 8);
2627 if (!p)
1da177e4
LT		 2628 goto out_resource;
2629 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
b64c7f3b 2630 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2631 }
2632 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
ddd1ea56
BF		 2633 p = xdr_reserve_space(xdr, 8);
2634 if (!p)
1da177e4
LT		 2635 goto out_resource;
2636 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
b64c7f3b 2637 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2638 }
2639 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
ddd1ea56
BF		 2640 p = xdr_reserve_space(xdr, 8);
2641 if (!p)
1da177e4
LT		 2642 goto out_resource;
2643 dummy64 = (u64)stat.blocks << 9;
b64c7f3b 2644 p = xdr_encode_hyper(p, dummy64);
1da177e4
LT		 2645 }
2646 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
ddd1ea56
BF		 2647 p = xdr_reserve_space(xdr, 12);
2648 if (!p)
1da177e4 2649 goto out_resource;
b64c7f3b 2650 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
c373b0a4 2651 *p++ = cpu_to_be32(stat.atime.tv_nsec);
1da177e4
LT		 2652 }
2653 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
ddd1ea56
BF		 2654 p = xdr_reserve_space(xdr, 12);
2655 if (!p)
1da177e4 2656 goto out_resource;
c373b0a4
BF		 2657 *p++ = cpu_to_be32(0);
2658 *p++ = cpu_to_be32(1);
2659 *p++ = cpu_to_be32(0);
1da177e4
LT		 2660 }
2661 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
ddd1ea56
BF		 2662 p = xdr_reserve_space(xdr, 12);
2663 if (!p)
1da177e4 2664 goto out_resource;
b64c7f3b 2665 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
c373b0a4 2666 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
1da177e4
LT		 2667 }
2668 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
ddd1ea56
BF		 2669 p = xdr_reserve_space(xdr, 12);
2670 if (!p)
1da177e4 2671 goto out_resource;
b64c7f3b 2672 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
c373b0a4 2673 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
1da177e4
LT		 2674 }
2675 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
ddd1ea56
BF		 2676 p = xdr_reserve_space(xdr, 8);
2677 if (!p)
1da177e4 2678 goto out_resource;
406a7ea9
FF		 2679 /*
2680 * Get parent's attributes if not ignoring crossmount
2681 * and this is the root of a cross-mounted filesystem.
2682 */
2683 if (ignore_crossmnt == 0 &&
ae7095a7
BF		 2684 dentry == exp->ex_path.mnt->mnt_root)
2685 get_parent_attributes(exp, &stat);
b64c7f3b 2686 p = xdr_encode_hyper(p, stat.ino);
1da177e4 2687 }
9cf514cc
CH		 2688#ifdef CONFIG_NFSD_PNFS
2689 if ((bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) ||
2690 (bmval2 & FATTR4_WORD2_LAYOUT_TYPES)) {
2691 if (exp->ex_layout_type) {
2692 p = xdr_reserve_space(xdr, 8);
2693 if (!p)
2694 goto out_resource;
2695 *p++ = cpu_to_be32(1);
2696 *p++ = cpu_to_be32(exp->ex_layout_type);
2697 } else {
2698 p = xdr_reserve_space(xdr, 4);
2699 if (!p)
2700 goto out_resource;
2701 *p++ = cpu_to_be32(0);
2702 }
2703 }
2704
2705 if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) {
2706 p = xdr_reserve_space(xdr, 4);
2707 if (!p)
2708 goto out_resource;
2709 *p++ = cpu_to_be32(stat.blksize);
2710 }
2711#endif /* CONFIG_NFSD_PNFS */
18032ca0 2712 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
ddd1ea56
BF		 2713 status = nfsd4_encode_security_label(xdr, rqstp, context,
2714 contextlen);
18032ca0
DQ		 2715 if (status)
2716 goto out;
2717 }
8c18f205 2718 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
ddd1ea56
BF		 2719 p = xdr_reserve_space(xdr, 16);
2720 if (!p)
de3997a7 2721 goto out_resource;
c373b0a4
BF		 2722 *p++ = cpu_to_be32(3);
2723 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2724 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2725 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
8c18f205 2726 }
7e705706 2727
082d4bd7
BF		 2728 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
2729 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
1da177e4
LT		 2730 status = nfs_ok;
2731
2732out:
ba4e55bb 2733#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
18032ca0
DQ		 2734 if (context)
2735 security_release_secctx(context, contextlen);
ba4e55bb 2736#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
28e05dd8 2737 kfree(acl);
18df11d0 2738 if (tempfh) {
d50e6136 2739 fh_put(tempfh);
18df11d0
YZ		 2740 kfree(tempfh);
2741 }
1fcea5b2
BF		 2742 if (status)
2743 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 2744 return status;
2745out_nfserr:
b8dd7b9a 2746 status = nfserrno(err);
1da177e4
LT		 2747 goto out;
2748out_resource:
1da177e4
LT		 2749 status = nfserr_resource;
2750 goto out;
1da177e4
LT		 2751}
2752
2825a7f9
BF		 2753static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
2754 struct xdr_buf *buf, __be32 *p, int bytes)
2755{
2756 xdr->scratch.iov_len = 0;
2757 memset(buf, 0, sizeof(struct xdr_buf));
2758 buf->head[0].iov_base = p;
2759 buf->head[0].iov_len = 0;
2760 buf->len = 0;
2761 xdr->buf = buf;
2762 xdr->iov = buf->head;
2763 xdr->p = p;
2764 xdr->end = (void *)p + bytes;
2765 buf->buflen = bytes;
2766}
2767
d5184658
BF		 2768__be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
2769 struct svc_fh *fhp, struct svc_export *exp,
2770 struct dentry *dentry, u32 *bmval,
2771 struct svc_rqst *rqstp, int ignore_crossmnt)
2772{
2825a7f9 2773 struct xdr_buf dummy;
d5184658
BF		 2774 struct xdr_stream xdr;
2775 __be32 ret;
2776
2825a7f9 2777 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
d5184658
BF		 2778 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
2779 ignore_crossmnt);
2780 *p = xdr.p;
2781 return ret;
2782}
2783
c0ce6ec8
BF		 2784static inline int attributes_need_mount(u32 *bmval)
2785{
2786 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2787 return 1;
2788 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2789 return 1;
2790 return 0;
2791}
2792
b37ad28b 2793static __be32
561f0ed4
BF		 2794nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
2795 const char *name, int namlen)
1da177e4
LT		 2796{
2797 struct svc_export *exp = cd->rd_fhp->fh_export;
2798 struct dentry *dentry;
b37ad28b 2799 __be32 nfserr;
406a7ea9 2800 int ignore_crossmnt = 0;
1da177e4
LT		 2801
2802 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2803 if (IS_ERR(dentry))
2804 return nfserrno(PTR_ERR(dentry));
2b0143b5 2805 if (d_really_is_negative(dentry)) {
b2c0cea6
BF		 2806 /*
2807 * nfsd_buffered_readdir drops the i_mutex between
2808 * readdir and calling this callback, leaving a window
2809 * where this directory entry could have gone away.
2810 */
2811 dput(dentry);
2812 return nfserr_noent;
2813 }
1da177e4
LT		 2814
2815 exp_get(exp);
406a7ea9
FF		 2816 /*
2817 * In the case of a mountpoint, the client may be asking for
2818 * attributes that are only properties of the underlying filesystem
2819 * as opposed to the cross-mounted file system. In such a case,
2820 * we will not follow the cross mount and will fill the attribtutes
2821 * directly from the mountpoint dentry.
2822 */
3227fa41 2823 if (nfsd_mountpoint(dentry, exp)) {
021d3a72
BF		 2824 int err;
2825
3227fa41
BF		 2826 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2827 && !attributes_need_mount(cd->rd_bmval)) {
2828 ignore_crossmnt = 1;
2829 goto out_encode;
2830 }
dcb488a3
AA		 2831 /*
2832 * Why the heck aren't we just using nfsd_lookup??
2833 * Different "."/".." handling? Something else?
2834 * At least, add a comment here to explain....
2835 */
021d3a72
BF		 2836 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2837 if (err) {
2838 nfserr = nfserrno(err);
1da177e4
LT		 2839 goto out_put;
2840 }
dcb488a3
AA		 2841 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2842 if (nfserr)
2843 goto out_put;
1da177e4
LT		 2844
2845 }
3227fa41 2846out_encode:
561f0ed4 2847 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
406a7ea9 2848 cd->rd_rqstp, ignore_crossmnt);
1da177e4
LT		 2849out_put:
2850 dput(dentry);
2851 exp_put(exp);
2852 return nfserr;
2853}
2854
2ebbc012 2855static __be32 *
561f0ed4 2856nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
1da177e4 2857{
561f0ed4
BF		 2858 __be32 *p;
2859
c3a45617 2860 p = xdr_reserve_space(xdr, 20);
561f0ed4 2861 if (!p)
1da177e4
LT		 2862 return NULL;
2863 *p++ = htonl(2);
2864 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2865 *p++ = htonl(0); /* bmval1 */
2866
87915c64 2867 *p++ = htonl(4); /* attribute length */
1da177e4 2868 *p++ = nfserr; /* no htonl */
1da177e4
LT		 2869 return p;
2870}
2871
2872static int
a0ad13ef
N		 2873nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2874 loff_t offset, u64 ino, unsigned int d_type)
1da177e4 2875{
a0ad13ef 2876 struct readdir_cd *ccd = ccdv;
1da177e4 2877 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
561f0ed4
BF		 2878 struct xdr_stream *xdr = cd->xdr;
2879 int start_offset = xdr->buf->len;
2880 int cookie_offset;
aee37764 2881 u32 name_and_cookie;
561f0ed4 2882 int entry_bytes;
b37ad28b 2883 __be32 nfserr = nfserr_toosmall;
561f0ed4
BF		 2884 __be64 wire_offset;
2885 __be32 *p;
1da177e4
LT		 2886
2887 /* In nfsv4, "." and ".." never make it onto the wire.. */
2888 if (name && isdotent(name, namlen)) {
2889 cd->common.err = nfs_ok;
2890 return 0;
2891 }
2892
561f0ed4
BF		 2893 if (cd->cookie_offset) {
2894 wire_offset = cpu_to_be64(offset);
2895 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
2896 &wire_offset, 8);
2897 }
1da177e4 2898
561f0ed4
BF		 2899 p = xdr_reserve_space(xdr, 4);
2900 if (!p)
1da177e4 2901 goto fail;
1da177e4 2902 *p++ = xdr_one; /* mark entry present */
561f0ed4
BF		 2903 cookie_offset = xdr->buf->len;
2904 p = xdr_reserve_space(xdr, 3*4 + namlen);
2905 if (!p)
2906 goto fail;
1da177e4
LT		 2907 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2908 p = xdr_encode_array(p, name, namlen); /* name length & name */
2909
561f0ed4 2910 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
1da177e4
LT		 2911 switch (nfserr) {
2912 case nfs_ok:
1da177e4
LT		 2913 break;
2914 case nfserr_resource:
2915 nfserr = nfserr_toosmall;
2916 goto fail;
b2c0cea6 2917 case nfserr_noent:
f41c5ad2 2918 xdr_truncate_encode(xdr, start_offset);
b2c0cea6 2919 goto skip_entry;
1da177e4
LT		 2920 default:
2921 /*
2922 * If the client requested the RDATTR_ERROR attribute,
2923 * we stuff the error code into this attribute
2924 * and continue. If this attribute was not requested,
2925 * then in accordance with the spec, we fail the
2926 * entire READDIR operation(!)
2927 */
2928 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2929 goto fail;
561f0ed4 2930 p = nfsd4_encode_rdattr_error(xdr, nfserr);
34081efc
FI		 2931 if (p == NULL) {
2932 nfserr = nfserr_toosmall;
1da177e4 2933 goto fail;
34081efc 2934 }
1da177e4 2935 }
561f0ed4
BF		 2936 nfserr = nfserr_toosmall;
2937 entry_bytes = xdr->buf->len - start_offset;
2938 if (entry_bytes > cd->rd_maxcount)
2939 goto fail;
2940 cd->rd_maxcount -= entry_bytes;
aee37764
BF		 2941 /*
2942 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", so
2943 * let's always let through the first entry, at least:
2944 */
0ec016e3
BF		 2945 if (!cd->rd_dircount)
2946 goto fail;
2947 name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8;
aee37764
BF		 2948 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset)
2949 goto fail;
2950 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie);
0ec016e3 2951
561f0ed4 2952 cd->cookie_offset = cookie_offset;
b2c0cea6 2953skip_entry:
1da177e4
LT		 2954 cd->common.err = nfs_ok;
2955 return 0;
2956fail:
561f0ed4 2957 xdr_truncate_encode(xdr, start_offset);
1da177e4
LT		 2958 cd->common.err = nfserr;
2959 return -EINVAL;
2960}
2961
d0a381dd
BF		 2962static __be32
2963nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
e2f282b9 2964{
bc749ca4 2965 __be32 *p;
e2f282b9 2966
d0a381dd
BF		 2967 p = xdr_reserve_space(xdr, sizeof(stateid_t));
2968 if (!p)
2969 return nfserr_resource;
c373b0a4 2970 *p++ = cpu_to_be32(sid->si_generation);
0c0c267b
BF		 2971 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
2972 sizeof(stateid_opaque_t));
d0a381dd 2973 return 0;
e2f282b9
BH		 2974}
2975
695e12f8 2976static __be32
b37ad28b 2977nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1da177e4 2978{
d0a381dd 2979 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 2980 __be32 *p;
1da177e4
LT		 2981
2982 if (!nfserr) {
d0a381dd
BF		 2983 p = xdr_reserve_space(xdr, 8);
2984 if (!p)
2985 return nfserr_resource;
c373b0a4
BF		 2986 *p++ = cpu_to_be32(access->ac_supported);
2987 *p++ = cpu_to_be32(access->ac_resp_access);
1da177e4 2988 }
695e12f8 2989 return nfserr;
1da177e4
LT		 2990}
2991
1d1bc8f2
BF		 2992static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
2993{
d0a381dd 2994 struct xdr_stream *xdr = &resp->xdr;
1d1bc8f2
BF		 2995 __be32 *p;
2996
2997 if (!nfserr) {
d0a381dd
BF		 2998 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
2999 if (!p)
3000 return nfserr_resource;
0c0c267b
BF		 3001 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
3002 NFS4_MAX_SESSIONID_LEN);
c373b0a4 3003 *p++ = cpu_to_be32(bcts->dir);
6e67b5d1 3004 /* Sorry, we do not yet support RDMA over 4.1: */
c373b0a4 3005 *p++ = cpu_to_be32(0);
1d1bc8f2
BF		 3006 }
3007 return nfserr;
3008}
3009
695e12f8 3010static __be32
b37ad28b 3011nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1da177e4 3012{
d0a381dd
BF		 3013 struct xdr_stream *xdr = &resp->xdr;
3014
e2f282b9 3015 if (!nfserr)
d0a381dd 3016 nfserr = nfsd4_encode_stateid(xdr, &close->cl_stateid);
e2f282b9 3017
695e12f8 3018 return nfserr;
1da177e4
LT		 3019}
3020
3021
695e12f8 3022static __be32
b37ad28b 3023nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1da177e4 3024{
d0a381dd 3025 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3026 __be32 *p;
1da177e4
LT		 3027
3028 if (!nfserr) {
d0a381dd
BF		 3029 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3030 if (!p)
3031 return nfserr_resource;
0c0c267b
BF		 3032 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
3033 NFS4_VERIFIER_SIZE);
1da177e4 3034 }
695e12f8 3035 return nfserr;
1da177e4
LT		 3036}
3037
695e12f8 3038static __be32
b37ad28b 3039nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1da177e4 3040{
d0a381dd 3041 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3042 __be32 *p;
1da177e4
LT		 3043
3044 if (!nfserr) {
d0a381dd
BF		 3045 p = xdr_reserve_space(xdr, 32);
3046 if (!p)
3047 return nfserr_resource;
d05d5744 3048 p = encode_cinfo(p, &create->cr_cinfo);
c373b0a4
BF		 3049 *p++ = cpu_to_be32(2);
3050 *p++ = cpu_to_be32(create->cr_bmval[0]);
3051 *p++ = cpu_to_be32(create->cr_bmval[1]);
1da177e4 3052 }
695e12f8 3053 return nfserr;
1da177e4
LT		 3054}
3055
b37ad28b
AV		 3056static __be32
3057nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
1da177e4
LT		 3058{
3059 struct svc_fh *fhp = getattr->ga_fhp;
d5184658 3060 struct xdr_stream *xdr = &resp->xdr;
1da177e4
LT		 3061
3062 if (nfserr)
3063 return nfserr;
3064
d5184658
BF		 3065 nfserr = nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
3066 getattr->ga_bmval,
406a7ea9 3067 resp->rqstp, 0);
1da177e4
LT		 3068 return nfserr;
3069}
3070
695e12f8
BH		 3071static __be32
3072nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
1da177e4 3073{
d0a381dd 3074 struct xdr_stream *xdr = &resp->xdr;
695e12f8 3075 struct svc_fh *fhp = *fhpp;
1da177e4 3076 unsigned int len;
bc749ca4 3077 __be32 *p;
1da177e4
LT		 3078
3079 if (!nfserr) {
3080 len = fhp->fh_handle.fh_size;
d0a381dd
BF		 3081 p = xdr_reserve_space(xdr, len + 4);
3082 if (!p)
3083 return nfserr_resource;
0c0c267b 3084 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
1da177e4 3085 }
695e12f8 3086 return nfserr;
1da177e4
LT		 3087}
3088
3089/*
3090* Including all fields other than the name, a LOCK4denied structure requires
3091* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
3092*/
d0a381dd
BF		 3093static __be32
3094nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
1da177e4 3095{
7c13f344 3096 struct xdr_netobj *conf = &ld->ld_owner;
bc749ca4 3097 __be32 *p;
1da177e4 3098
8c7424cf 3099again:
d0a381dd 3100 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
8c7424cf
BF		 3101 if (!p) {
3102 /*
3103 * Don't fail to return the result just because we can't
3104 * return the conflicting open:
3105 */
3106 if (conf->len) {
f98bac5a 3107 kfree(conf->data);
8c7424cf
BF		 3108 conf->len = 0;
3109 conf->data = NULL;
3110 goto again;
3111 }
d0a381dd 3112 return nfserr_resource;
8c7424cf 3113 }
b64c7f3b
BF		 3114 p = xdr_encode_hyper(p, ld->ld_start);
3115 p = xdr_encode_hyper(p, ld->ld_length);
c373b0a4 3116 *p++ = cpu_to_be32(ld->ld_type);
7c13f344 3117 if (conf->len) {
0c0c267b
BF		 3118 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
3119 p = xdr_encode_opaque(p, conf->data, conf->len);
f98bac5a 3120 kfree(conf->data);
1da177e4 3121 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
b64c7f3b 3122 p = xdr_encode_hyper(p, (u64)0); /* clientid */
c373b0a4 3123 *p++ = cpu_to_be32(0); /* length of owner name */
1da177e4 3124 }
d0a381dd 3125 return nfserr_denied;
1da177e4
LT		 3126}
3127
695e12f8 3128static __be32
b37ad28b 3129nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
1da177e4 3130{
d0a381dd
BF		 3131 struct xdr_stream *xdr = &resp->xdr;
3132
e2f282b9 3133 if (!nfserr)
d0a381dd 3134 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
e2f282b9 3135 else if (nfserr == nfserr_denied)
d0a381dd 3136 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
f98bac5a 3137
695e12f8 3138 return nfserr;
1da177e4
LT		 3139}
3140
695e12f8 3141static __be32
b37ad28b 3142nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
1da177e4 3143{
d0a381dd
BF		 3144 struct xdr_stream *xdr = &resp->xdr;
3145
1da177e4 3146 if (nfserr == nfserr_denied)
d0a381dd 3147 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
695e12f8 3148 return nfserr;
1da177e4
LT		 3149}
3150
695e12f8 3151static __be32
b37ad28b 3152nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
1da177e4 3153{
d0a381dd
BF		 3154 struct xdr_stream *xdr = &resp->xdr;
3155
e2f282b9 3156 if (!nfserr)
d0a381dd 3157 nfserr = nfsd4_encode_stateid(xdr, &locku->lu_stateid);
e2f282b9 3158
695e12f8 3159 return nfserr;
1da177e4
LT		 3160}
3161
3162
695e12f8 3163static __be32
b37ad28b 3164nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
1da177e4 3165{
d0a381dd 3166 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3167 __be32 *p;
1da177e4
LT		 3168
3169 if (!nfserr) {
d0a381dd
BF		 3170 p = xdr_reserve_space(xdr, 20);
3171 if (!p)
3172 return nfserr_resource;
d05d5744 3173 p = encode_cinfo(p, &link->li_cinfo);
1da177e4 3174 }
695e12f8 3175 return nfserr;
1da177e4
LT		 3176}
3177
3178
695e12f8 3179static __be32
b37ad28b 3180nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
1da177e4 3181{
d0a381dd 3182 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3183 __be32 *p;
1da177e4
LT		 3184
3185 if (nfserr)
3186 goto out;
3187
d0a381dd
BF		 3188 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
3189 if (nfserr)
3190 goto out;
3191 p = xdr_reserve_space(xdr, 40);
3192 if (!p)
3193 return nfserr_resource;
d05d5744 3194 p = encode_cinfo(p, &open->op_cinfo);
c373b0a4
BF		 3195 *p++ = cpu_to_be32(open->op_rflags);
3196 *p++ = cpu_to_be32(2);
3197 *p++ = cpu_to_be32(open->op_bmval[0]);
3198 *p++ = cpu_to_be32(open->op_bmval[1]);
3199 *p++ = cpu_to_be32(open->op_delegate_type);
1da177e4
LT		 3200
3201 switch (open->op_delegate_type) {
3202 case NFS4_OPEN_DELEGATE_NONE:
3203 break;
3204 case NFS4_OPEN_DELEGATE_READ:
d0a381dd
BF		 3205 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3206 if (nfserr)
3207 return nfserr;
3208 p = xdr_reserve_space(xdr, 20);
3209 if (!p)
3210 return nfserr_resource;
c373b0a4 3211 *p++ = cpu_to_be32(open->op_recall);
1da177e4
LT		 3212
3213 /*
3214 * TODO: ACE's in delegations
3215 */
c373b0a4
BF		 3216 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3217 *p++ = cpu_to_be32(0);
3218 *p++ = cpu_to_be32(0);
3219 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
1da177e4
LT		 3220 break;
3221 case NFS4_OPEN_DELEGATE_WRITE:
d0a381dd
BF		 3222 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3223 if (nfserr)
3224 return nfserr;
3225 p = xdr_reserve_space(xdr, 32);
3226 if (!p)
3227 return nfserr_resource;
c373b0a4 3228 *p++ = cpu_to_be32(0);
1da177e4
LT		 3229
3230 /*
3231 * TODO: space_limit's in delegations
3232 */
c373b0a4
BF		 3233 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
3234 *p++ = cpu_to_be32(~(u32)0);
3235 *p++ = cpu_to_be32(~(u32)0);
1da177e4
LT		 3236
3237 /*
3238 * TODO: ACE's in delegations
3239 */
c373b0a4
BF		 3240 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3241 *p++ = cpu_to_be32(0);
3242 *p++ = cpu_to_be32(0);
3243 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
1da177e4 3244 break;
d24433cd
BH		 3245 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3246 switch (open->op_why_no_deleg) {
3247 case WND4_CONTENTION:
3248 case WND4_RESOURCE:
d0a381dd
BF		 3249 p = xdr_reserve_space(xdr, 8);
3250 if (!p)
3251 return nfserr_resource;
c373b0a4
BF		 3252 *p++ = cpu_to_be32(open->op_why_no_deleg);
3253 /* deleg signaling not supported yet: */
3254 *p++ = cpu_to_be32(0);
d24433cd
BH		 3255 break;
3256 default:
d0a381dd
BF		 3257 p = xdr_reserve_space(xdr, 4);
3258 if (!p)
3259 return nfserr_resource;
c373b0a4 3260 *p++ = cpu_to_be32(open->op_why_no_deleg);
d24433cd 3261 }
d24433cd 3262 break;
1da177e4
LT		 3263 default:
3264 BUG();
3265 }
3266 /* XXX save filehandle here */
3267out:
695e12f8 3268 return nfserr;
1da177e4
LT		 3269}
3270
695e12f8 3271static __be32
b37ad28b 3272nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
1da177e4 3273{
d0a381dd
BF		 3274 struct xdr_stream *xdr = &resp->xdr;
3275
e2f282b9 3276 if (!nfserr)
d0a381dd 3277 nfserr = nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
1da177e4 3278
695e12f8 3279 return nfserr;
1da177e4
LT		 3280}
3281
695e12f8 3282static __be32
b37ad28b 3283nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
1da177e4 3284{
d0a381dd
BF		 3285 struct xdr_stream *xdr = &resp->xdr;
3286
e2f282b9 3287 if (!nfserr)
d0a381dd 3288 nfserr = nfsd4_encode_stateid(xdr, &od->od_stateid);
1da177e4 3289
695e12f8 3290 return nfserr;
1da177e4
LT		 3291}
3292
dc97618d
BF		 3293static __be32 nfsd4_encode_splice_read(
3294 struct nfsd4_compoundres *resp,
3295 struct nfsd4_read *read,
3296 struct file *file, unsigned long maxcount)
1da177e4 3297{
ddd1ea56 3298 struct xdr_stream *xdr = &resp->xdr;
34a78b48 3299 struct xdr_buf *buf = xdr->buf;
dc97618d 3300 u32 eof;
30596768 3301 int space_left;
dc97618d 3302 __be32 nfserr;
fec25fa4 3303 __be32 *p = xdr->p - 2;
1da177e4 3304
d5d5c304
KM		 3305 /* Make sure there will be room for padding if needed */
3306 if (xdr->end - xdr->p < 1)
d0a381dd 3307 return nfserr_resource;
dc97618d
BF		 3308
3309 nfserr = nfsd_splice_read(read->rd_rqstp, file,
3310 read->rd_offset, &maxcount);
3311 if (nfserr) {
3312 /*
3313 * nfsd_splice_actor may have already messed with the
3314 * page length; reset it so as not to confuse
3315 * xdr_truncate_encode:
3316 */
34a78b48 3317 buf->page_len = 0;
dc97618d 3318 return nfserr;
b0e35fda 3319 }
1da177e4 3320
dc97618d 3321 eof = (read->rd_offset + maxcount >=
2b0143b5 3322 d_inode(read->rd_fhp->fh_dentry)->i_size);
4e21ac4b 3323
fec25fa4
BF		 3324 *(p++) = htonl(eof);
3325 *(p++) = htonl(maxcount);
dc97618d 3326
34a78b48
BF		 3327 buf->page_len = maxcount;
3328 buf->len += maxcount;
15b23ef5
BF		 3329 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1)
3330 / PAGE_SIZE;
dc97618d
BF		 3331
3332 /* Use rest of head for padding and remaining ops: */
34a78b48
BF		 3333 buf->tail[0].iov_base = xdr->p;
3334 buf->tail[0].iov_len = 0;
fec25fa4 3335 xdr->iov = buf->tail;
dc97618d 3336 if (maxcount&3) {
fec25fa4
BF		 3337 int pad = 4 - (maxcount&3);
3338
3339 *(xdr->p++) = 0;
3340
34a78b48 3341 buf->tail[0].iov_base += maxcount&3;
fec25fa4
BF		 3342 buf->tail[0].iov_len = pad;
3343 buf->len += pad;
b0e35fda 3344 }
2825a7f9 3345
dc97618d 3346 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
34a78b48
BF		 3347 buf->buflen - buf->len);
3348 buf->buflen = buf->len + space_left;
dc97618d
BF		 3349 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3350
3351 return 0;
3352}
3353
3354static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3355 struct nfsd4_read *read,
3356 struct file *file, unsigned long maxcount)
3357{
3358 struct xdr_stream *xdr = &resp->xdr;
3359 u32 eof;
3360 int v;
dc97618d 3361 int starting_len = xdr->buf->len - 8;
dc97618d 3362 long len;
b0420980 3363 int thislen;
dc97618d
BF		 3364 __be32 nfserr;
3365 __be32 tmp;
3366 __be32 *p;
b0420980
BF		 3367 u32 zzz = 0;
3368 int pad;
1da177e4
LT		 3369
3370 len = maxcount;
3371 v = 0;
6ff9897d 3372
1055414f 3373 thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p));
b0420980
BF		 3374 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3375 WARN_ON_ONCE(!p);
3376 resp->rqstp->rq_vec[v].iov_base = p;
3377 resp->rqstp->rq_vec[v].iov_len = thislen;
3378 v++;
3379 len -= thislen;
3380
3381 while (len) {
6ff9897d 3382 thislen = min_t(long, len, PAGE_SIZE);
b0420980
BF		 3383 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3384 WARN_ON_ONCE(!p);
3385 resp->rqstp->rq_vec[v].iov_base = p;
6ff9897d 3386 resp->rqstp->rq_vec[v].iov_len = thislen;
1da177e4 3387 v++;
6ff9897d 3388 len -= thislen;
1da177e4
LT		 3389 }
3390 read->rd_vlen = v;
3391
dc97618d
BF		 3392 nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec,
3393 read->rd_vlen, &maxcount);
3394 if (nfserr)
1da177e4 3395 return nfserr;
b0420980 3396 xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3));
dc97618d 3397
44524359 3398 eof = (read->rd_offset + maxcount >=
2b0143b5 3399 d_inode(read->rd_fhp->fh_dentry)->i_size);
1da177e4 3400
dc97618d
BF		 3401 tmp = htonl(eof);
3402 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
3403 tmp = htonl(maxcount);
3404 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3405
b0420980
BF		 3406 pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
3407 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
3408 &zzz, pad);
1da177e4 3409 return 0;
dc97618d
BF		 3410
3411}
3412
3413static __be32
3414nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3415 struct nfsd4_read *read)
3416{
3417 unsigned long maxcount;
3418 struct xdr_stream *xdr = &resp->xdr;
3419 struct file *file = read->rd_filp;
3420 int starting_len = xdr->buf->len;
e749a462 3421 struct raparms *ra = NULL;
dc97618d
BF		 3422 __be32 *p;
3423 __be32 err;
3424
3425 if (nfserr)
3426 return nfserr;
3427
3428 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
3429 if (!p) {
779fb0f3 3430 WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags));
dc97618d
BF		 3431 return nfserr_resource;
3432 }
779fb0f3 3433 if (resp->xdr.buf->page_len && test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) {
b0420980 3434 WARN_ON_ONCE(1);
dc97618d
BF		 3435 return nfserr_resource;
3436 }
dc97618d
BF		 3437 xdr_commit_encode(xdr);
3438
3439 maxcount = svc_max_payload(resp->rqstp);
3c7aa15d
KM		 3440 maxcount = min_t(unsigned long, maxcount, (xdr->buf->buflen - xdr->buf->len));
3441 maxcount = min_t(unsigned long, maxcount, read->rd_length);
dc97618d 3442
af90f707 3443 if (read->rd_tmp_file)
e749a462 3444 ra = nfsd_init_raparms(file);
dc97618d 3445
779fb0f3 3446 if (file->f_op->splice_read && test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags))
dc97618d
BF		 3447 err = nfsd4_encode_splice_read(resp, read, file, maxcount);
3448 else
3449 err = nfsd4_encode_readv(resp, read, file, maxcount);
3450
e749a462
CH		 3451 if (ra)
3452 nfsd_put_raparams(file, ra);
dc97618d 3453
dc97618d
BF		 3454 if (err)
3455 xdr_truncate_encode(xdr, starting_len);
3456 return err;
1da177e4
LT		 3457}
3458
b37ad28b
AV		 3459static __be32
3460nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
1da177e4
LT		 3461{
3462 int maxcount;
476a7b1f
BF		 3463 __be32 wire_count;
3464 int zero = 0;
ddd1ea56 3465 struct xdr_stream *xdr = &resp->xdr;
1fcea5b2 3466 int length_offset = xdr->buf->len;
bc749ca4 3467 __be32 *p;
1da177e4
LT		 3468
3469 if (nfserr)
3470 return nfserr;
2825a7f9
BF		 3471
3472 p = xdr_reserve_space(xdr, 4);
3473 if (!p)
3474 return nfserr_resource;
1da177e4 3475 maxcount = PAGE_SIZE;
d0a381dd 3476
476a7b1f
BF		 3477 p = xdr_reserve_space(xdr, maxcount);
3478 if (!p)
4e21ac4b 3479 return nfserr_resource;
1da177e4
LT		 3480 /*
3481 * XXX: By default, the ->readlink() VFS op will truncate symlinks
3482 * if they would overflow the buffer. Is this kosher in NFSv4? If
3483 * not, one easy fix is: if ->readlink() precisely fills the buffer,
3484 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
3485 */
476a7b1f
BF		 3486 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
3487 (char *)p, &maxcount);
1da177e4 3488 if (nfserr == nfserr_isdir)
d3f627c8
BF		 3489 nfserr = nfserr_inval;
3490 if (nfserr) {
1fcea5b2 3491 xdr_truncate_encode(xdr, length_offset);
1da177e4 3492 return nfserr;
d3f627c8 3493 }
1da177e4 3494
476a7b1f
BF		 3495 wire_count = htonl(maxcount);
3496 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
69bbd9c7 3497 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4));
476a7b1f
BF		 3498 if (maxcount & 3)
3499 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
3500 &zero, 4 - (maxcount&3));
1da177e4
LT		 3501 return 0;
3502}
3503
b37ad28b
AV		 3504static __be32
3505nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
1da177e4
LT		 3506{
3507 int maxcount;
561f0ed4 3508 int bytes_left;
1da177e4 3509 loff_t offset;
561f0ed4 3510 __be64 wire_offset;
ddd1ea56 3511 struct xdr_stream *xdr = &resp->xdr;
1fcea5b2 3512 int starting_len = xdr->buf->len;
bc749ca4 3513 __be32 *p;
1da177e4
LT		 3514
3515 if (nfserr)
3516 return nfserr;
1da177e4 3517
d0a381dd
BF		 3518 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3519 if (!p)
3520 return nfserr_resource;
1da177e4
LT		 3521
3522 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
c373b0a4
BF		 3523 *p++ = cpu_to_be32(0);
3524 *p++ = cpu_to_be32(0);
4aea24b2
BF		 3525 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
3526 - (char *)resp->xdr.buf->head[0].iov_base;
1da177e4
LT		 3527
3528 /*
561f0ed4
BF		 3529 * Number of bytes left for directory entries allowing for the
3530 * final 8 bytes of the readdir and a following failed op:
3531 */
3532 bytes_left = xdr->buf->buflen - xdr->buf->len
3533 - COMPOUND_ERR_SLACK_SPACE - 8;
3534 if (bytes_left < 0) {
3535 nfserr = nfserr_resource;
3536 goto err_no_verf;
3537 }
3538 maxcount = min_t(u32, readdir->rd_maxcount, INT_MAX);
3539 /*
3540 * Note the rfc defines rd_maxcount as the size of the
3541 * READDIR4resok structure, which includes the verifier above
3542 * and the 8 bytes encoded at the end of this function:
1da177e4 3543 */
561f0ed4
BF		 3544 if (maxcount < 16) {
3545 nfserr = nfserr_toosmall;
1da177e4
LT		 3546 goto err_no_verf;
3547 }
561f0ed4 3548 maxcount = min_t(int, maxcount-16, bytes_left);
1da177e4 3549
aee37764
BF		 3550 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */
3551 if (!readdir->rd_dircount)
3552 readdir->rd_dircount = INT_MAX;
3553
561f0ed4
BF		 3554 readdir->xdr = xdr;
3555 readdir->rd_maxcount = maxcount;
1da177e4 3556 readdir->common.err = 0;
561f0ed4 3557 readdir->cookie_offset = 0;
1da177e4
LT		 3558
3559 offset = readdir->rd_cookie;
3560 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3561 &offset,
3562 &readdir->common, nfsd4_encode_dirent);
3563 if (nfserr == nfs_ok &&
3564 readdir->common.err == nfserr_toosmall &&
561f0ed4
BF		 3565 xdr->buf->len == starting_len + 8) {
3566 /* nothing encoded; which limit did we hit?: */
3567 if (maxcount - 16 < bytes_left)
3568 /* It was the fault of rd_maxcount: */
3569 nfserr = nfserr_toosmall;
3570 else
3571 /* We ran out of buffer space: */
3572 nfserr = nfserr_resource;
3573 }
1da177e4
LT		 3574 if (nfserr)
3575 goto err_no_verf;
3576
561f0ed4
BF		 3577 if (readdir->cookie_offset) {
3578 wire_offset = cpu_to_be64(offset);
3579 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
3580 &wire_offset, 8);
3581 }
1da177e4 3582
561f0ed4
BF		 3583 p = xdr_reserve_space(xdr, 8);
3584 if (!p) {
3585 WARN_ON_ONCE(1);
3586 goto err_no_verf;
3587 }
1da177e4
LT		 3588 *p++ = 0; /* no more entries */
3589 *p++ = htonl(readdir->common.err == nfserr_eof);
1da177e4
LT		 3590
3591 return 0;
3592err_no_verf:
1fcea5b2 3593 xdr_truncate_encode(xdr, starting_len);
1da177e4
LT		 3594 return nfserr;
3595}
3596
695e12f8 3597static __be32
b37ad28b 3598nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
1da177e4 3599{
d0a381dd 3600 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3601 __be32 *p;
1da177e4
LT		 3602
3603 if (!nfserr) {
d0a381dd
BF		 3604 p = xdr_reserve_space(xdr, 20);
3605 if (!p)
3606 return nfserr_resource;
d05d5744 3607 p = encode_cinfo(p, &remove->rm_cinfo);
1da177e4 3608 }
695e12f8 3609 return nfserr;
1da177e4
LT		 3610}
3611
695e12f8 3612static __be32
b37ad28b 3613nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
1da177e4 3614{
d0a381dd 3615 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3616 __be32 *p;
1da177e4
LT		 3617
3618 if (!nfserr) {
d0a381dd
BF		 3619 p = xdr_reserve_space(xdr, 40);
3620 if (!p)
3621 return nfserr_resource;
d05d5744
BF		 3622 p = encode_cinfo(p, &rename->rn_sinfo);
3623 p = encode_cinfo(p, &rename->rn_tinfo);
1da177e4 3624 }
695e12f8 3625 return nfserr;
1da177e4
LT		 3626}
3627
695e12f8 3628static __be32
d0a381dd 3629nfsd4_do_encode_secinfo(struct xdr_stream *xdr,
a77c806f 3630 __be32 nfserr, struct svc_export *exp)
dcb488a3 3631{
676e4ebd 3632 u32 i, nflavs, supported;
4796f457
BF		 3633 struct exp_flavor_info *flavs;
3634 struct exp_flavor_info def_flavs[2];
676e4ebd
CL		 3635 __be32 *p, *flavorsp;
3636 static bool report = true;
dcb488a3
AA		 3637
3638 if (nfserr)
3639 goto out;
d0a381dd 3640 nfserr = nfserr_resource;
4796f457
BF		 3641 if (exp->ex_nflavors) {
3642 flavs = exp->ex_flavors;
3643 nflavs = exp->ex_nflavors;
3644 } else { /* Handling of some defaults in absence of real secinfo: */
3645 flavs = def_flavs;
3646 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3647 nflavs = 2;
3648 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3649 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3650 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3651 nflavs = 1;
3652 flavs[0].pseudoflavor
3653 = svcauth_gss_flavor(exp->ex_client);
3654 } else {
3655 nflavs = 1;
3656 flavs[0].pseudoflavor
3657 = exp->ex_client->flavour->flavour;
3658 }
3659 }
3660
676e4ebd 3661 supported = 0;
d0a381dd
BF		 3662 p = xdr_reserve_space(xdr, 4);
3663 if (!p)
3664 goto out;
676e4ebd 3665 flavorsp = p++; /* to be backfilled later */
676e4ebd 3666
4796f457 3667 for (i = 0; i < nflavs; i++) {
676e4ebd 3668 rpc_authflavor_t pf = flavs[i].pseudoflavor;
a77c806f 3669 struct rpcsec_gss_info info;
dcb488a3 3670
676e4ebd
CL		 3671 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3672 supported++;
d0a381dd
BF		 3673 p = xdr_reserve_space(xdr, 4 + 4 +
3674 XDR_LEN(info.oid.len) + 4 + 4);
3675 if (!p)
3676 goto out;
c373b0a4 3677 *p++ = cpu_to_be32(RPC_AUTH_GSS);
0c0c267b 3678 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
c373b0a4
BF		 3679 *p++ = cpu_to_be32(info.qop);
3680 *p++ = cpu_to_be32(info.service);
676e4ebd
CL		 3681 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3682 supported++;
d0a381dd
BF		 3683 p = xdr_reserve_space(xdr, 4);
3684 if (!p)
3685 goto out;
c373b0a4 3686 *p++ = cpu_to_be32(pf);
676e4ebd
CL		 3687 } else {
3688 if (report)
3689 pr_warn("NFS: SECINFO: security flavor %u "
3690 "is not supported\n", pf);
dcb488a3
AA		 3691 }
3692 }
a77c806f 3693
676e4ebd
CL		 3694 if (nflavs != supported)
3695 report = false;
3696 *flavorsp = htonl(supported);
d0a381dd 3697 nfserr = 0;
dcb488a3
AA		 3698out:
3699 if (exp)
3700 exp_put(exp);
695e12f8 3701 return nfserr;
dcb488a3
AA		 3702}
3703
22b6dee8
MJ		 3704static __be32
3705nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3706 struct nfsd4_secinfo *secinfo)
3707{
d0a381dd
BF		 3708 struct xdr_stream *xdr = &resp->xdr;
3709
3710 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->si_exp);
22b6dee8
MJ		 3711}
3712
3713static __be32
3714nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3715 struct nfsd4_secinfo_no_name *secinfo)
3716{
d0a381dd
BF		 3717 struct xdr_stream *xdr = &resp->xdr;
3718
3719 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->sin_exp);
22b6dee8
MJ		 3720}
3721
1da177e4
LT		 3722/*
3723 * The SETATTR encode routine is special -- it always encodes a bitmap,
3724 * regardless of the error status.
3725 */
695e12f8 3726static __be32
b37ad28b 3727nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
1da177e4 3728{
d0a381dd 3729 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3730 __be32 *p;
1da177e4 3731
d0a381dd
BF		 3732 p = xdr_reserve_space(xdr, 16);
3733 if (!p)
3734 return nfserr_resource;
1da177e4 3735 if (nfserr) {
c373b0a4
BF		 3736 *p++ = cpu_to_be32(3);
3737 *p++ = cpu_to_be32(0);
3738 *p++ = cpu_to_be32(0);
3739 *p++ = cpu_to_be32(0);
1da177e4
LT		 3740 }
3741 else {
c373b0a4
BF		 3742 *p++ = cpu_to_be32(3);
3743 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
3744 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
3745 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
1da177e4 3746 }
695e12f8 3747 return nfserr;
1da177e4
LT		 3748}
3749
695e12f8 3750static __be32
b37ad28b 3751nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
1da177e4 3752{
d0a381dd 3753 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3754 __be32 *p;
1da177e4
LT		 3755
3756 if (!nfserr) {
d0a381dd
BF		 3757 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
3758 if (!p)
3759 return nfserr_resource;
0c0c267b
BF		 3760 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
3761 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
3762 NFS4_VERIFIER_SIZE);
1da177e4
LT		 3763 }
3764 else if (nfserr == nfserr_clid_inuse) {
d0a381dd
BF		 3765 p = xdr_reserve_space(xdr, 8);
3766 if (!p)
3767 return nfserr_resource;
c373b0a4
BF		 3768 *p++ = cpu_to_be32(0);
3769 *p++ = cpu_to_be32(0);
1da177e4 3770 }
695e12f8 3771 return nfserr;
1da177e4
LT		 3772}
3773
695e12f8 3774static __be32
b37ad28b 3775nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
1da177e4 3776{
d0a381dd 3777 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3778 __be32 *p;
1da177e4
LT		 3779
3780 if (!nfserr) {
d0a381dd
BF		 3781 p = xdr_reserve_space(xdr, 16);
3782 if (!p)
3783 return nfserr_resource;
c373b0a4
BF		 3784 *p++ = cpu_to_be32(write->wr_bytes_written);
3785 *p++ = cpu_to_be32(write->wr_how_written);
0c0c267b
BF		 3786 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
3787 NFS4_VERIFIER_SIZE);
1da177e4 3788 }
695e12f8 3789 return nfserr;
1da177e4
LT		 3790}
3791
57266a6e
BF		 3792static const u32 nfs4_minimal_spo_must_enforce[2] = {
3793 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
3794 1 << (OP_EXCHANGE_ID - 32) |
3795 1 << (OP_CREATE_SESSION - 32) |
3796 1 << (OP_DESTROY_SESSION - 32) |
3797 1 << (OP_DESTROY_CLIENTID - 32)
3798};
3799
2db134eb 3800static __be32
57b7b43b 3801nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3802 struct nfsd4_exchange_id *exid)
3803{
d0a381dd 3804 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3805 __be32 *p;
0733d213
AA		 3806 char *major_id;
3807 char *server_scope;
3808 int major_id_sz;
3809 int server_scope_sz;
3810 uint64_t minor_id = 0;
3811
3812 if (nfserr)
3813 return nfserr;
3814
3815 major_id = utsname()->nodename;
3816 major_id_sz = strlen(major_id);
3817 server_scope = utsname()->nodename;
3818 server_scope_sz = strlen(server_scope);
3819
d0a381dd 3820 p = xdr_reserve_space(xdr,
0733d213
AA		 3821 8 /* eir_clientid */ +
3822 4 /* eir_sequenceid */ +
3823 4 /* eir_flags */ +
a8bb84bc 3824 4 /* spr_how */);
d0a381dd
BF		 3825 if (!p)
3826 return nfserr_resource;
0733d213 3827
0c0c267b 3828 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
c373b0a4
BF		 3829 *p++ = cpu_to_be32(exid->seqid);
3830 *p++ = cpu_to_be32(exid->flags);
0733d213 3831
c373b0a4 3832 *p++ = cpu_to_be32(exid->spa_how);
a8bb84bc 3833
57266a6e
BF		 3834 switch (exid->spa_how) {
3835 case SP4_NONE:
3836 break;
3837 case SP4_MACH_CRED:
a8bb84bc 3838 /* spo_must_enforce, spo_must_allow */
d0a381dd
BF		 3839 p = xdr_reserve_space(xdr, 16);
3840 if (!p)
3841 return nfserr_resource;
a8bb84bc 3842
57266a6e 3843 /* spo_must_enforce bitmap: */
c373b0a4
BF		 3844 *p++ = cpu_to_be32(2);
3845 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[0]);
3846 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[1]);
57266a6e 3847 /* empty spo_must_allow bitmap: */
c373b0a4 3848 *p++ = cpu_to_be32(0);
a8bb84bc 3849
57266a6e
BF		 3850 break;
3851 default:
3852 WARN_ON_ONCE(1);
3853 }
0733d213 3854
d0a381dd 3855 p = xdr_reserve_space(xdr,
a8bb84bc
KM		 3856 8 /* so_minor_id */ +
3857 4 /* so_major_id.len */ +
3858 (XDR_QUADLEN(major_id_sz) * 4) +
3859 4 /* eir_server_scope.len */ +
3860 (XDR_QUADLEN(server_scope_sz) * 4) +
3861 4 /* eir_server_impl_id.count (0) */);
d0a381dd
BF		 3862 if (!p)
3863 return nfserr_resource;
a8bb84bc 3864
0733d213 3865 /* The server_owner struct */
b64c7f3b 3866 p = xdr_encode_hyper(p, minor_id); /* Minor id */
0733d213 3867 /* major id */
0c0c267b 3868 p = xdr_encode_opaque(p, major_id, major_id_sz);
0733d213
AA		 3869
3870 /* Server scope */
0c0c267b 3871 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
0733d213
AA		 3872
3873 /* Implementation id */
c373b0a4 3874 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */
0733d213 3875 return 0;
2db134eb
AA		 3876}
3877
3878static __be32
57b7b43b 3879nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3880 struct nfsd4_create_session *sess)
3881{
d0a381dd 3882 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3883 __be32 *p;
ec6b5d7b
AA		 3884
3885 if (nfserr)
3886 return nfserr;
3887
d0a381dd
BF		 3888 p = xdr_reserve_space(xdr, 24);
3889 if (!p)
3890 return nfserr_resource;
0c0c267b
BF		 3891 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
3892 NFS4_MAX_SESSIONID_LEN);
c373b0a4
BF		 3893 *p++ = cpu_to_be32(sess->seqid);
3894 *p++ = cpu_to_be32(sess->flags);
ec6b5d7b 3895
d0a381dd
BF		 3896 p = xdr_reserve_space(xdr, 28);
3897 if (!p)
3898 return nfserr_resource;
c373b0a4
BF		 3899 *p++ = cpu_to_be32(0); /* headerpadsz */
3900 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
3901 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
3902 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
3903 *p++ = cpu_to_be32(sess->fore_channel.maxops);
3904 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
3905 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
ec6b5d7b
AA		 3906
3907 if (sess->fore_channel.nr_rdma_attrs) {
d0a381dd
BF		 3908 p = xdr_reserve_space(xdr, 4);
3909 if (!p)
3910 return nfserr_resource;
c373b0a4 3911 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
ec6b5d7b
AA		 3912 }
3913
d0a381dd
BF		 3914 p = xdr_reserve_space(xdr, 28);
3915 if (!p)
3916 return nfserr_resource;
c373b0a4
BF		 3917 *p++ = cpu_to_be32(0); /* headerpadsz */
3918 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
3919 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
3920 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
3921 *p++ = cpu_to_be32(sess->back_channel.maxops);
3922 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
3923 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
ec6b5d7b
AA		 3924
3925 if (sess->back_channel.nr_rdma_attrs) {
d0a381dd
BF		 3926 p = xdr_reserve_space(xdr, 4);
3927 if (!p)
3928 return nfserr_resource;
c373b0a4 3929 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
ec6b5d7b
AA		 3930 }
3931 return 0;
2db134eb
AA		 3932}
3933
c47d832b 3934static __be32
57b7b43b 3935nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
2db134eb
AA		 3936 struct nfsd4_sequence *seq)
3937{
d0a381dd 3938 struct xdr_stream *xdr = &resp->xdr;
bc749ca4 3939 __be32 *p;
b85d4c01
BH		 3940
3941 if (nfserr)
3942 return nfserr;
3943
d0a381dd
BF		 3944 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
3945 if (!p)
3946 return nfserr_resource;
0c0c267b
BF		 3947 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
3948 NFS4_MAX_SESSIONID_LEN);
c373b0a4
BF		 3949 *p++ = cpu_to_be32(seq->seqid);
3950 *p++ = cpu_to_be32(seq->slotid);
b7d7ca35 3951 /* Note slotid's are numbered from zero: */
c373b0a4
BF		 3952 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
3953 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
3954 *p++ = cpu_to_be32(seq->status_flags);
b85d4c01 3955
f5236013 3956 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
b85d4c01 3957 return 0;
2db134eb
AA		 3958}
3959
2355c596 3960static __be32
57b7b43b 3961nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
17456804
BS		 3962 struct nfsd4_test_stateid *test_stateid)
3963{
d0a381dd 3964 struct xdr_stream *xdr = &resp->xdr;
03cfb420 3965 struct nfsd4_test_stateid_id *stateid, *next;
17456804 3966 __be32 *p;
17456804 3967
a11fcce1
BF		 3968 if (nfserr)
3969 return nfserr;
3970
d0a381dd
BF		 3971 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
3972 if (!p)
3973 return nfserr_resource;
17456804 3974 *p++ = htonl(test_stateid->ts_num_ids);
17456804 3975
03cfb420 3976 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
02f5fde5 3977 *p++ = stateid->ts_id_status;
17456804 3978 }
17456804
BS		 3979
3980 return nfserr;
3981}
3982
9cf514cc
CH		 3983#ifdef CONFIG_NFSD_PNFS
3984static __be32
3985nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3986 struct nfsd4_getdeviceinfo *gdev)
3987{
3988 struct xdr_stream *xdr = &resp->xdr;
3989 const struct nfsd4_layout_ops *ops =
3990 nfsd4_layout_ops[gdev->gd_layout_type];
3991 u32 starting_len = xdr->buf->len, needed_len;
3992 __be32 *p;
3993
3994 dprintk("%s: err %d\n", __func__, nfserr);
3995 if (nfserr)
3996 goto out;
3997
3998 nfserr = nfserr_resource;
3999 p = xdr_reserve_space(xdr, 4);
4000 if (!p)
4001 goto out;
4002
4003 *p++ = cpu_to_be32(gdev->gd_layout_type);
4004
4005 /* If maxcount is 0 then just update notifications */
4006 if (gdev->gd_maxcount != 0) {
4007 nfserr = ops->encode_getdeviceinfo(xdr, gdev);
4008 if (nfserr) {
4009 /*
4010 * We don't bother to burden the layout drivers with
4011 * enforcing gd_maxcount, just tell the client to
4012 * come back with a bigger buffer if it's not enough.
4013 */
4014 if (xdr->buf->len + 4 > gdev->gd_maxcount)
4015 goto toosmall;
4016 goto out;
4017 }
4018 }
4019
4020 nfserr = nfserr_resource;
4021 if (gdev->gd_notify_types) {
4022 p = xdr_reserve_space(xdr, 4 + 4);
4023 if (!p)
4024 goto out;
4025 *p++ = cpu_to_be32(1); /* bitmap length */
4026 *p++ = cpu_to_be32(gdev->gd_notify_types);
4027 } else {
4028 p = xdr_reserve_space(xdr, 4);
4029 if (!p)
4030 goto out;
4031 *p++ = 0;
4032 }
4033
4034 nfserr = 0;
4035out:
4036 kfree(gdev->gd_device);
4037 dprintk("%s: done: %d\n", __func__, be32_to_cpu(nfserr));
4038 return nfserr;
4039
4040toosmall:
4041 dprintk("%s: maxcount too small\n", __func__);
4042 needed_len = xdr->buf->len + 4 /* notifications */;
4043 xdr_truncate_encode(xdr, starting_len);
4044 p = xdr_reserve_space(xdr, 4);
4045 if (!p) {
4046 nfserr = nfserr_resource;
4047 } else {
4048 *p++ = cpu_to_be32(needed_len);
4049 nfserr = nfserr_toosmall;
4050 }
4051 goto out;
4052}
4053
4054static __be32
4055nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr,
4056 struct nfsd4_layoutget *lgp)
4057{
4058 struct xdr_stream *xdr = &resp->xdr;
4059 const struct nfsd4_layout_ops *ops =
4060 nfsd4_layout_ops[lgp->lg_layout_type];
4061 __be32 *p;
4062
4063 dprintk("%s: err %d\n", __func__, nfserr);
4064 if (nfserr)
4065 goto out;
4066
4067 nfserr = nfserr_resource;
4068 p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t));
4069 if (!p)
4070 goto out;
4071
4072 *p++ = cpu_to_be32(1); /* we always set return-on-close */
4073 *p++ = cpu_to_be32(lgp->lg_sid.si_generation);
4074 p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque,
4075 sizeof(stateid_opaque_t));
4076
4077 *p++ = cpu_to_be32(1); /* we always return a single layout */
4078 p = xdr_encode_hyper(p, lgp->lg_seg.offset);
4079 p = xdr_encode_hyper(p, lgp->lg_seg.length);
4080 *p++ = cpu_to_be32(lgp->lg_seg.iomode);
4081 *p++ = cpu_to_be32(lgp->lg_layout_type);
4082
4083 nfserr = ops->encode_layoutget(xdr, lgp);
4084out:
4085 kfree(lgp->lg_content);
4086 return nfserr;
4087}
4088
4089static __be32
4090nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr,
4091 struct nfsd4_layoutcommit *lcp)
4092{
4093 struct xdr_stream *xdr = &resp->xdr;
4094 __be32 *p;
4095
4096 if (nfserr)
4097 return nfserr;
4098
4099 p = xdr_reserve_space(xdr, 4);
4100 if (!p)
4101 return nfserr_resource;
4102 *p++ = cpu_to_be32(lcp->lc_size_chg);
4103 if (lcp->lc_size_chg) {
4104 p = xdr_reserve_space(xdr, 8);
4105 if (!p)
4106 return nfserr_resource;
4107 p = xdr_encode_hyper(p, lcp->lc_newsize);
4108 }
4109
4110 return nfs_ok;
4111}
4112
4113static __be32
4114nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr,
4115 struct nfsd4_layoutreturn *lrp)
4116{
4117 struct xdr_stream *xdr = &resp->xdr;
4118 __be32 *p;
4119
4120 if (nfserr)
4121 return nfserr;
4122
4123 p = xdr_reserve_space(xdr, 4);
4124 if (!p)
4125 return nfserr_resource;
4126 *p++ = cpu_to_be32(lrp->lrs_present);
4127 if (lrp->lrs_present)
376675da 4128 return nfsd4_encode_stateid(xdr, &lrp->lr_sid);
9cf514cc
CH		 4129 return nfs_ok;
4130}
4131#endif /* CONFIG_NFSD_PNFS */
4132
24bab491
AS		 4133static __be32
4134nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
4135 struct nfsd4_seek *seek)
4136{
4137 __be32 *p;
4138
4139 if (nfserr)
4140 return nfserr;
4141
4142 p = xdr_reserve_space(&resp->xdr, 4 + 8);
4143 *p++ = cpu_to_be32(seek->seek_eof);
4144 p = xdr_encode_hyper(p, seek->seek_pos);
4145
4146 return nfserr;
4147}
4148
695e12f8
BH		 4149static __be32
4150nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
4151{
4152 return nfserr;
4153}
4154
4155typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
4156
2db134eb
AA		 4157/*
4158 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
4159 * since we don't need to filter out obsolete ops as this is
4160 * done in the decoding phase.
4161 */
695e12f8 4162static nfsd4_enc nfsd4_enc_ops[] = {
ad1060c8
BF		 4163 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
4164 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
4165 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
4166 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
4167 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
4168 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
4169 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
4170 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
4171 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
4172 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
4173 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
4174 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
4175 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
4176 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
4177 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4178 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
84f09f46 4179 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
ad1060c8
BF		 4180 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
4181 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
4182 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
4183 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
4184 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
4185 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
4186 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
4187 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
4188 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
4189 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
4190 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
4191 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
4192 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
4193 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
4194 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
4195 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
4196 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
4197 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4198 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
4199 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb
AA		 4200
4201 /* NFSv4.1 operations */
4202 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
1d1bc8f2 4203 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
2db134eb
AA		 4204 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
4205 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
43212cc7
KM		 4206 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
4207 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
2db134eb 4208 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
9cf514cc
CH		 4209#ifdef CONFIG_NFSD_PNFS
4210 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo,
4211 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4212 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit,
4213 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget,
4214 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn,
4215#else
2db134eb
AA		 4216 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
4217 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4218 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
4219 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
4220 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
9cf514cc 4221#endif
22b6dee8 4222 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
2db134eb
AA		 4223 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
4224 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
17456804 4225 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
2db134eb
AA		 4226 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
4227 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
4228 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
87a15a80
AS		 4229
4230 /* NFSv4.2 operations */
4231 [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
4232 [OP_COPY] = (nfsd4_enc)nfsd4_encode_noop,
4233 [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_noop,
4234 [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
4235 [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop,
4236 [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop,
4237 [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop,
4238 [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop,
4239 [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_noop,
4240 [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_noop,
24bab491 4241 [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek,
87a15a80 4242 [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop,
695e12f8
BH		 4243};
4244
496c262c 4245/*
a8095f7e
BF		 4246 * Calculate whether we still have space to encode repsize bytes.
4247 * There are two considerations:
4248 * - For NFS versions >=4.1, the size of the reply must stay within
4249 * session limits
4250 * - For all NFS versions, we must stay within limited preallocated
4251 * buffer space.
496c262c 4252 *
a8095f7e
BF		 4253 * This is called before the operation is processed, so can only provide
4254 * an upper estimate. For some nonidempotent operations (such as
4255 * getattr), it's not necessarily a problem if that estimate is wrong,
4256 * as we can fail it after processing without significant side effects.
496c262c 4257 */
a8095f7e 4258__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
496c262c 4259{
67492c99 4260 struct xdr_buf *buf = &resp->rqstp->rq_res;
47ee5298 4261 struct nfsd4_slot *slot = resp->cstate.slot;
496c262c 4262
47ee5298
BF		 4263 if (buf->len + respsize <= buf->buflen)
4264 return nfs_ok;
4265 if (!nfsd4_has_session(&resp->cstate))
ea8d7720 4266 return nfserr_resource;
47ee5298
BF		 4267 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
4268 WARN_ON_ONCE(1);
4269 return nfserr_rep_too_big_to_cache;
ea8d7720 4270 }
47ee5298 4271 return nfserr_rep_too_big;
496c262c
AA		 4272}
4273
1da177e4
LT		 4274void
4275nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
4276{
082d4bd7 4277 struct xdr_stream *xdr = &resp->xdr;
9411b1d4 4278 struct nfs4_stateowner *so = resp->cstate.replay_owner;
5f4ab945 4279 struct svc_rqst *rqstp = resp->rqstp;
082d4bd7 4280 int post_err_offset;
07d1f802 4281 nfsd4_enc encoder;
bc749ca4 4282 __be32 *p;
1da177e4 4283
d0a381dd
BF		 4284 p = xdr_reserve_space(xdr, 8);
4285 if (!p) {
4286 WARN_ON_ONCE(1);
4287 return;
4288 }
c373b0a4 4289 *p++ = cpu_to_be32(op->opnum);
082d4bd7 4290 post_err_offset = xdr->buf->len;
1da177e4 4291
695e12f8
BH		 4292 if (op->opnum == OP_ILLEGAL)
4293 goto status;
4294 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
4295 !nfsd4_enc_ops[op->opnum]);
07d1f802
BF		 4296 encoder = nfsd4_enc_ops[op->opnum];
4297 op->status = encoder(resp, op->status, &op->u);
2825a7f9
BF		 4298 xdr_commit_encode(xdr);
4299
067e1ace 4300 /* nfsd4_check_resp_size guarantees enough room for error status */
5f4ab945
BF		 4301 if (!op->status) {
4302 int space_needed = 0;
4303 if (!nfsd4_last_compound_op(rqstp))
4304 space_needed = COMPOUND_ERR_SLACK_SPACE;
4305 op->status = nfsd4_check_resp_size(resp, space_needed);
4306 }
c8f13d97
BF		 4307 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
4308 struct nfsd4_slot *slot = resp->cstate.slot;
4309
4310 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
4311 op->status = nfserr_rep_too_big_to_cache;
4312 else
4313 op->status = nfserr_rep_too_big;
4314 }
07d1f802
BF		 4315 if (op->status == nfserr_resource ||
4316 op->status == nfserr_rep_too_big ||
4317 op->status == nfserr_rep_too_big_to_cache) {
4318 /*
4319 * The operation may have already been encoded or
4320 * partially encoded. No op returns anything additional
4321 * in the case of one of these three errors, so we can
4322 * just truncate back to after the status. But it's a
4323 * bug if we had to do this on a non-idempotent op:
4324 */
4325 warn_on_nonidempotent_op(op);
082d4bd7 4326 xdr_truncate_encode(xdr, post_err_offset);
07d1f802 4327 }
9411b1d4 4328 if (so) {
082d4bd7
BF		 4329 int len = xdr->buf->len - post_err_offset;
4330
9411b1d4 4331 so->so_replay.rp_status = op->status;
082d4bd7
BF		 4332 so->so_replay.rp_buflen = len;
4333 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
4334 so->so_replay.rp_buf, len);
9411b1d4 4335 }
695e12f8 4336status:
082d4bd7
BF		 4337 /* Note that op->status is already in network byte order: */
4338 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
1da177e4
LT		 4339}
4340
4341/*
4342 * Encode the reply stored in the stateowner reply cache
4343 *
4344 * XDR note: do not encode rp->rp_buflen: the buffer contains the
4345 * previously sent already encoded operation.
1da177e4
LT		 4346 */
4347void
d0a381dd 4348nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
1da177e4 4349{
bc749ca4 4350 __be32 *p;
1da177e4
LT		 4351 struct nfs4_replay *rp = op->replay;
4352
4353 BUG_ON(!rp);
4354
d0a381dd
BF		 4355 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
4356 if (!p) {
4357 WARN_ON_ONCE(1);
4358 return;
4359 }
c373b0a4 4360 *p++ = cpu_to_be32(op->opnum);
1da177e4 4361 *p++ = rp->rp_status; /* already xdr'ed */
1da177e4 4362
0c0c267b 4363 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
1da177e4
LT		 4364}
4365
1da177e4 4366int
2ebbc012 4367nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
1da177e4
LT		 4368{
4369 return xdr_ressize_check(rqstp, p);
4370}
4371
3e98abff 4372int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
1da177e4 4373{
3e98abff
BF		 4374 struct svc_rqst *rqstp = rq;
4375 struct nfsd4_compoundargs *args = rqstp->rq_argp;
4376
1da177e4
LT		 4377 if (args->ops != args->iops) {
4378 kfree(args->ops);
4379 args->ops = args->iops;
4380 }
f99d49ad
JJ		 4381 kfree(args->tmpp);
4382 args->tmpp = NULL;
1da177e4 4383 while (args->to_free) {
d5e23383 4384 struct svcxdr_tmpbuf *tb = args->to_free;
1da177e4 4385 args->to_free = tb->next;
1da177e4
LT		 4386 kfree(tb);
4387 }
3e98abff 4388 return 1;
1da177e4
LT		 4389}
4390
4391int
2ebbc012 4392nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
1da177e4 4393{
e874f9f8
JL		 4394 if (rqstp->rq_arg.head[0].iov_len % 4) {
4395 /* client is nuts */
4396 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
4397 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
4398 return 0;
4399 }
1da177e4
LT		 4400 args->p = p;
4401 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
4402 args->pagelist = rqstp->rq_arg.pages;
4403 args->pagelen = rqstp->rq_arg.page_len;
4404 args->tmpp = NULL;
4405 args->to_free = NULL;
4406 args->ops = args->iops;
4407 args->rqstp = rqstp;
4408
3e98abff 4409 return !nfsd4_decode_compound(args);
1da177e4
LT		 4410}
4411
4412int
2ebbc012 4413nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
1da177e4
LT		 4414{
4415 /*
4416 * All that remains is to write the tag and operation count...
4417 */
6ac90391
BF		 4418 struct xdr_buf *buf = resp->xdr.buf;
4419
4420 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
4421 buf->tail[0].iov_len);
dd97fdde 4422
2825a7f9
BF		 4423 rqstp->rq_next_page = resp->xdr.page_ptr + 1;
4424
1da177e4
LT		 4425 p = resp->tagp;
4426 *p++ = htonl(resp->taglen);
4427 memcpy(p, resp->tag, resp->taglen);
4428 p += XDR_QUADLEN(resp->taglen);
4429 *p++ = htonl(resp->opcnt);
4430
b607664e 4431 nfsd4_sequence_done(resp);
1da177e4
LT		 4432 return 1;
4433}
4434
4435/*
4436 * Local variables:
4437 * c-basic-offset: 8
4438 * End:
4439 */
ubuntu-bionic-kernel mirror