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Linux 4.9.4
[linux/fpc-iii.git] / fs / nfsd / nfs4xdr.c
blobc2d2895a1ec1d222f8e3b9913f65f603164707cb
1 /*
2 * Server-side XDR for NFSv4
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 */
35
36 #include <linux/file.h>
37 #include <linux/slab.h>
38 #include <linux/namei.h>
39 #include <linux/statfs.h>
40 #include <linux/utsname.h>
41 #include <linux/pagemap.h>
42 #include <linux/sunrpc/svcauth_gss.h>
43
44 #include "idmap.h"
45 #include "acl.h"
46 #include "xdr4.h"
47 #include "vfs.h"
48 #include "state.h"
49 #include "cache.h"
50 #include "netns.h"
51 #include "pnfs.h"
52
53 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
54 #include <linux/security.h>
55 #endif
56
57
58 #define NFSDDBG_FACILITY NFSDDBG_XDR
59
60 /*
61 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
62 * directory in order to indicate to the client that a filesystem boundary is present
63 * We use a fixed fsid for a referral
64 */
65 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
66 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
67
68 static __be32
69 check_filename(char *str, int len)
70 {
71 int i;
72
73 if (len == 0)
74 return nfserr_inval;
75 if (isdotent(str, len))
76 return nfserr_badname;
77 for (i = 0; i < len; i++)
78 if (str[i] == '/')
79 return nfserr_badname;
80 return 0;
81 }
82
83 #define DECODE_HEAD \
84 __be32 *p; \
85 __be32 status
86 #define DECODE_TAIL \
87 status = 0; \
88 out: \
89 return status; \
90 xdr_error: \
91 dprintk("NFSD: xdr error (%s:%d)\n", \
92 __FILE__, __LINE__); \
93 status = nfserr_bad_xdr; \
94 goto out
95
96 #define READMEM(x,nbytes) do { \
97 x = (char *)p; \
98 p += XDR_QUADLEN(nbytes); \
99 } while (0)
100 #define SAVEMEM(x,nbytes) do { \
101 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
102 savemem(argp, p, nbytes) : \
103 (char *)p)) { \
104 dprintk("NFSD: xdr error (%s:%d)\n", \
105 __FILE__, __LINE__); \
106 goto xdr_error; \
107 } \
108 p += XDR_QUADLEN(nbytes); \
109 } while (0)
110 #define COPYMEM(x,nbytes) do { \
111 memcpy((x), p, nbytes); \
112 p += XDR_QUADLEN(nbytes); \
113 } while (0)
114
115 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
116 #define READ_BUF(nbytes) do { \
117 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
118 p = argp->p; \
119 argp->p += XDR_QUADLEN(nbytes); \
120 } else if (!(p = read_buf(argp, nbytes))) { \
121 dprintk("NFSD: xdr error (%s:%d)\n", \
122 __FILE__, __LINE__); \
123 goto xdr_error; \
124 } \
125 } while (0)
126
127 static void next_decode_page(struct nfsd4_compoundargs *argp)
128 {
129 argp->p = page_address(argp->pagelist[0]);
130 argp->pagelist++;
131 if (argp->pagelen < PAGE_SIZE) {
132 argp->end = argp->p + (argp->pagelen>>2);
133 argp->pagelen = 0;
134 } else {
135 argp->end = argp->p + (PAGE_SIZE>>2);
136 argp->pagelen -= PAGE_SIZE;
137 }
138 }
139
140 static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
141 {
142 /* We want more bytes than seem to be available.
143 * Maybe we need a new page, maybe we have just run out
144 */
145 unsigned int avail = (char *)argp->end - (char *)argp->p;
146 __be32 *p;
147 if (avail + argp->pagelen < nbytes)
148 return NULL;
149 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
150 return NULL;
151 /* ok, we can do it with the current plus the next page */
152 if (nbytes <= sizeof(argp->tmp))
153 p = argp->tmp;
154 else {
155 kfree(argp->tmpp);
156 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
157 if (!p)
158 return NULL;
159
160 }
161 /*
162 * The following memcpy is safe because read_buf is always
163 * called with nbytes > avail, and the two cases above both
164 * guarantee p points to at least nbytes bytes.
165 */
166 memcpy(p, argp->p, avail);
167 next_decode_page(argp);
168 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
169 argp->p += XDR_QUADLEN(nbytes - avail);
170 return p;
171 }
172
173 static int zero_clientid(clientid_t *clid)
174 {
175 return (clid->cl_boot == 0) && (clid->cl_id == 0);
176 }
177
178 /**
179 * svcxdr_tmpalloc - allocate memory to be freed after compound processing
180 * @argp: NFSv4 compound argument structure
181 * @p: pointer to be freed (with kfree())
182 *
183 * Marks @p to be freed when processing the compound operation
184 * described in @argp finishes.
185 */
186 static void *
187 svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len)
188 {
189 struct svcxdr_tmpbuf *tb;
190
191 tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL);
192 if (!tb)
193 return NULL;
194 tb->next = argp->to_free;
195 argp->to_free = tb;
196 return tb->buf;
197 }
198
199 /*
200 * For xdr strings that need to be passed to other kernel api's
201 * as null-terminated strings.
202 *
203 * Note null-terminating in place usually isn't safe since the
204 * buffer might end on a page boundary.
205 */
206 static char *
207 svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len)
208 {
209 char *p = svcxdr_tmpalloc(argp, len + 1);
210
211 if (!p)
212 return NULL;
213 memcpy(p, buf, len);
214 p[len] = '\0';
215 return p;
216 }
217
218 /**
219 * savemem - duplicate a chunk of memory for later processing
220 * @argp: NFSv4 compound argument structure to be freed with
221 * @p: pointer to be duplicated
222 * @nbytes: length to be duplicated
223 *
224 * Returns a pointer to a copy of @nbytes bytes of memory at @p
225 * that are preserved until processing of the NFSv4 compound
226 * operation described by @argp finishes.
227 */
228 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
229 {
230 void *ret;
231
232 ret = svcxdr_tmpalloc(argp, nbytes);
233 if (!ret)
234 return NULL;
235 memcpy(ret, p, nbytes);
236 return ret;
237 }
238
239 /*
240 * We require the high 32 bits of 'seconds' to be 0, and
241 * we ignore all 32 bits of 'nseconds'.
242 */
243 static __be32
244 nfsd4_decode_time(struct nfsd4_compoundargs *argp, struct timespec *tv)
245 {
246 DECODE_HEAD;
247 u64 sec;
248
249 READ_BUF(12);
250 p = xdr_decode_hyper(p, &sec);
251 tv->tv_sec = sec;
252 tv->tv_nsec = be32_to_cpup(p++);
253 if (tv->tv_nsec >= (u32)1000000000)
254 return nfserr_inval;
255
256 DECODE_TAIL;
257 }
258
259 static __be32
260 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
261 {
262 u32 bmlen;
263 DECODE_HEAD;
264
265 bmval[0] = 0;
266 bmval[1] = 0;
267 bmval[2] = 0;
268
269 READ_BUF(4);
270 bmlen = be32_to_cpup(p++);
271 if (bmlen > 1000)
272 goto xdr_error;
273
274 READ_BUF(bmlen << 2);
275 if (bmlen > 0)
276 bmval[0] = be32_to_cpup(p++);
277 if (bmlen > 1)
278 bmval[1] = be32_to_cpup(p++);
279 if (bmlen > 2)
280 bmval[2] = be32_to_cpup(p++);
281
282 DECODE_TAIL;
283 }
284
285 static __be32
286 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
287 struct iattr *iattr, struct nfs4_acl **acl,
288 struct xdr_netobj *label)
289 {
290 int expected_len, len = 0;
291 u32 dummy32;
292 char *buf;
293
294 DECODE_HEAD;
295 iattr->ia_valid = 0;
296 if ((status = nfsd4_decode_bitmap(argp, bmval)))
297 return status;
298
299 READ_BUF(4);
300 expected_len = be32_to_cpup(p++);
301
302 if (bmval[0] & FATTR4_WORD0_SIZE) {
303 READ_BUF(8);
304 len += 8;
305 p = xdr_decode_hyper(p, &iattr->ia_size);
306 iattr->ia_valid |= ATTR_SIZE;
307 }
308 if (bmval[0] & FATTR4_WORD0_ACL) {
309 u32 nace;
310 struct nfs4_ace *ace;
311
312 READ_BUF(4); len += 4;
313 nace = be32_to_cpup(p++);
314
315 if (nace > NFS4_ACL_MAX)
316 return nfserr_fbig;
317
318 *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(nace));
319 if (*acl == NULL)
320 return nfserr_jukebox;
321
322 (*acl)->naces = nace;
323 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
324 READ_BUF(16); len += 16;
325 ace->type = be32_to_cpup(p++);
326 ace->flag = be32_to_cpup(p++);
327 ace->access_mask = be32_to_cpup(p++);
328 dummy32 = be32_to_cpup(p++);
329 READ_BUF(dummy32);
330 len += XDR_QUADLEN(dummy32) << 2;
331 READMEM(buf, dummy32);
332 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
333 status = nfs_ok;
334 if (ace->whotype != NFS4_ACL_WHO_NAMED)
335 ;
336 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
337 status = nfsd_map_name_to_gid(argp->rqstp,
338 buf, dummy32, &ace->who_gid);
339 else
340 status = nfsd_map_name_to_uid(argp->rqstp,
341 buf, dummy32, &ace->who_uid);
342 if (status)
343 return status;
344 }
345 } else
346 *acl = NULL;
347 if (bmval[1] & FATTR4_WORD1_MODE) {
348 READ_BUF(4);
349 len += 4;
350 iattr->ia_mode = be32_to_cpup(p++);
351 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
352 iattr->ia_valid |= ATTR_MODE;
353 }
354 if (bmval[1] & FATTR4_WORD1_OWNER) {
355 READ_BUF(4);
356 len += 4;
357 dummy32 = be32_to_cpup(p++);
358 READ_BUF(dummy32);
359 len += (XDR_QUADLEN(dummy32) << 2);
360 READMEM(buf, dummy32);
361 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
362 return status;
363 iattr->ia_valid |= ATTR_UID;
364 }
365 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
366 READ_BUF(4);
367 len += 4;
368 dummy32 = be32_to_cpup(p++);
369 READ_BUF(dummy32);
370 len += (XDR_QUADLEN(dummy32) << 2);
371 READMEM(buf, dummy32);
372 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
373 return status;
374 iattr->ia_valid |= ATTR_GID;
375 }
376 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
377 READ_BUF(4);
378 len += 4;
379 dummy32 = be32_to_cpup(p++);
380 switch (dummy32) {
381 case NFS4_SET_TO_CLIENT_TIME:
382 len += 12;
383 status = nfsd4_decode_time(argp, &iattr->ia_atime);
384 if (status)
385 return status;
386 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
387 break;
388 case NFS4_SET_TO_SERVER_TIME:
389 iattr->ia_valid |= ATTR_ATIME;
390 break;
391 default:
392 goto xdr_error;
393 }
394 }
395 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
396 READ_BUF(4);
397 len += 4;
398 dummy32 = be32_to_cpup(p++);
399 switch (dummy32) {
400 case NFS4_SET_TO_CLIENT_TIME:
401 len += 12;
402 status = nfsd4_decode_time(argp, &iattr->ia_mtime);
403 if (status)
404 return status;
405 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
406 break;
407 case NFS4_SET_TO_SERVER_TIME:
408 iattr->ia_valid |= ATTR_MTIME;
409 break;
410 default:
411 goto xdr_error;
412 }
413 }
414
415 label->len = 0;
416 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
417 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
418 READ_BUF(4);
419 len += 4;
420 dummy32 = be32_to_cpup(p++); /* lfs: we don't use it */
421 READ_BUF(4);
422 len += 4;
423 dummy32 = be32_to_cpup(p++); /* pi: we don't use it either */
424 READ_BUF(4);
425 len += 4;
426 dummy32 = be32_to_cpup(p++);
427 READ_BUF(dummy32);
428 if (dummy32 > NFS4_MAXLABELLEN)
429 return nfserr_badlabel;
430 len += (XDR_QUADLEN(dummy32) << 2);
431 READMEM(buf, dummy32);
432 label->len = dummy32;
433 label->data = svcxdr_dupstr(argp, buf, dummy32);
434 if (!label->data)
435 return nfserr_jukebox;
436 }
437 #endif
438
439 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
440 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
441 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
442 READ_BUF(expected_len - len);
443 else if (len != expected_len)
444 goto xdr_error;
445
446 DECODE_TAIL;
447 }
448
449 static __be32
450 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
451 {
452 DECODE_HEAD;
453
454 READ_BUF(sizeof(stateid_t));
455 sid->si_generation = be32_to_cpup(p++);
456 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
457
458 DECODE_TAIL;
459 }
460
461 static __be32
462 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
463 {
464 DECODE_HEAD;
465
466 READ_BUF(4);
467 access->ac_req_access = be32_to_cpup(p++);
468
469 DECODE_TAIL;
470 }
471
472 static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
473 {
474 DECODE_HEAD;
475 u32 dummy, uid, gid;
476 char *machine_name;
477 int i;
478 int nr_secflavs;
479
480 /* callback_sec_params4 */
481 READ_BUF(4);
482 nr_secflavs = be32_to_cpup(p++);
483 if (nr_secflavs)
484 cbs->flavor = (u32)(-1);
485 else
486 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
487 cbs->flavor = 0;
488 for (i = 0; i < nr_secflavs; ++i) {
489 READ_BUF(4);
490 dummy = be32_to_cpup(p++);
491 switch (dummy) {
492 case RPC_AUTH_NULL:
493 /* Nothing to read */
494 if (cbs->flavor == (u32)(-1))
495 cbs->flavor = RPC_AUTH_NULL;
496 break;
497 case RPC_AUTH_UNIX:
498 READ_BUF(8);
499 /* stamp */
500 dummy = be32_to_cpup(p++);
501
502 /* machine name */
503 dummy = be32_to_cpup(p++);
504 READ_BUF(dummy);
505 SAVEMEM(machine_name, dummy);
506
507 /* uid, gid */
508 READ_BUF(8);
509 uid = be32_to_cpup(p++);
510 gid = be32_to_cpup(p++);
511
512 /* more gids */
513 READ_BUF(4);
514 dummy = be32_to_cpup(p++);
515 READ_BUF(dummy * 4);
516 if (cbs->flavor == (u32)(-1)) {
517 kuid_t kuid = make_kuid(&init_user_ns, uid);
518 kgid_t kgid = make_kgid(&init_user_ns, gid);
519 if (uid_valid(kuid) && gid_valid(kgid)) {
520 cbs->uid = kuid;
521 cbs->gid = kgid;
522 cbs->flavor = RPC_AUTH_UNIX;
523 } else {
524 dprintk("RPC_AUTH_UNIX with invalid"
525 "uid or gid ignoring!\n");
526 }
527 }
528 break;
529 case RPC_AUTH_GSS:
530 dprintk("RPC_AUTH_GSS callback secflavor "
531 "not supported!\n");
532 READ_BUF(8);
533 /* gcbp_service */
534 dummy = be32_to_cpup(p++);
535 /* gcbp_handle_from_server */
536 dummy = be32_to_cpup(p++);
537 READ_BUF(dummy);
538 p += XDR_QUADLEN(dummy);
539 /* gcbp_handle_from_client */
540 READ_BUF(4);
541 dummy = be32_to_cpup(p++);
542 READ_BUF(dummy);
543 break;
544 default:
545 dprintk("Illegal callback secflavor\n");
546 return nfserr_inval;
547 }
548 }
549 DECODE_TAIL;
550 }
551
552 static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
553 {
554 DECODE_HEAD;
555
556 READ_BUF(4);
557 bc->bc_cb_program = be32_to_cpup(p++);
558 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
559
560 DECODE_TAIL;
561 }
562
563 static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
564 {
565 DECODE_HEAD;
566
567 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
568 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
569 bcts->dir = be32_to_cpup(p++);
570 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
571 * could help us figure out we should be using it. */
572 DECODE_TAIL;
573 }
574
575 static __be32
576 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
577 {
578 DECODE_HEAD;
579
580 READ_BUF(4);
581 close->cl_seqid = be32_to_cpup(p++);
582 return nfsd4_decode_stateid(argp, &close->cl_stateid);
583
584 DECODE_TAIL;
585 }
586
587
588 static __be32
589 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
590 {
591 DECODE_HEAD;
592
593 READ_BUF(12);
594 p = xdr_decode_hyper(p, &commit->co_offset);
595 commit->co_count = be32_to_cpup(p++);
596
597 DECODE_TAIL;
598 }
599
600 static __be32
601 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
602 {
603 DECODE_HEAD;
604
605 READ_BUF(4);
606 create->cr_type = be32_to_cpup(p++);
607 switch (create->cr_type) {
608 case NF4LNK:
609 READ_BUF(4);
610 create->cr_datalen = be32_to_cpup(p++);
611 READ_BUF(create->cr_datalen);
612 create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen);
613 if (!create->cr_data)
614 return nfserr_jukebox;
615 break;
616 case NF4BLK:
617 case NF4CHR:
618 READ_BUF(8);
619 create->cr_specdata1 = be32_to_cpup(p++);
620 create->cr_specdata2 = be32_to_cpup(p++);
621 break;
622 case NF4SOCK:
623 case NF4FIFO:
624 case NF4DIR:
625 default:
626 break;
627 }
628
629 READ_BUF(4);
630 create->cr_namelen = be32_to_cpup(p++);
631 READ_BUF(create->cr_namelen);
632 SAVEMEM(create->cr_name, create->cr_namelen);
633 if ((status = check_filename(create->cr_name, create->cr_namelen)))
634 return status;
635
636 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
637 &create->cr_acl, &create->cr_label);
638 if (status)
639 goto out;
640
641 DECODE_TAIL;
642 }
643
644 static inline __be32
645 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
646 {
647 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
648 }
649
650 static inline __be32
651 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
652 {
653 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
654 }
655
656 static __be32
657 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
658 {
659 DECODE_HEAD;
660
661 READ_BUF(4);
662 link->li_namelen = be32_to_cpup(p++);
663 READ_BUF(link->li_namelen);
664 SAVEMEM(link->li_name, link->li_namelen);
665 if ((status = check_filename(link->li_name, link->li_namelen)))
666 return status;
667
668 DECODE_TAIL;
669 }
670
671 static __be32
672 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
673 {
674 DECODE_HEAD;
675
676 /*
677 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
678 */
679 READ_BUF(28);
680 lock->lk_type = be32_to_cpup(p++);
681 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
682 goto xdr_error;
683 lock->lk_reclaim = be32_to_cpup(p++);
684 p = xdr_decode_hyper(p, &lock->lk_offset);
685 p = xdr_decode_hyper(p, &lock->lk_length);
686 lock->lk_is_new = be32_to_cpup(p++);
687
688 if (lock->lk_is_new) {
689 READ_BUF(4);
690 lock->lk_new_open_seqid = be32_to_cpup(p++);
691 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
692 if (status)
693 return status;
694 READ_BUF(8 + sizeof(clientid_t));
695 lock->lk_new_lock_seqid = be32_to_cpup(p++);
696 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
697 lock->lk_new_owner.len = be32_to_cpup(p++);
698 READ_BUF(lock->lk_new_owner.len);
699 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
700 } else {
701 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
702 if (status)
703 return status;
704 READ_BUF(4);
705 lock->lk_old_lock_seqid = be32_to_cpup(p++);
706 }
707
708 DECODE_TAIL;
709 }
710
711 static __be32
712 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
713 {
714 DECODE_HEAD;
715
716 READ_BUF(32);
717 lockt->lt_type = be32_to_cpup(p++);
718 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
719 goto xdr_error;
720 p = xdr_decode_hyper(p, &lockt->lt_offset);
721 p = xdr_decode_hyper(p, &lockt->lt_length);
722 COPYMEM(&lockt->lt_clientid, 8);
723 lockt->lt_owner.len = be32_to_cpup(p++);
724 READ_BUF(lockt->lt_owner.len);
725 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
726
727 DECODE_TAIL;
728 }
729
730 static __be32
731 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
732 {
733 DECODE_HEAD;
734
735 READ_BUF(8);
736 locku->lu_type = be32_to_cpup(p++);
737 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
738 goto xdr_error;
739 locku->lu_seqid = be32_to_cpup(p++);
740 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
741 if (status)
742 return status;
743 READ_BUF(16);
744 p = xdr_decode_hyper(p, &locku->lu_offset);
745 p = xdr_decode_hyper(p, &locku->lu_length);
746
747 DECODE_TAIL;
748 }
749
750 static __be32
751 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
752 {
753 DECODE_HEAD;
754
755 READ_BUF(4);
756 lookup->lo_len = be32_to_cpup(p++);
757 READ_BUF(lookup->lo_len);
758 SAVEMEM(lookup->lo_name, lookup->lo_len);
759 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
760 return status;
761
762 DECODE_TAIL;
763 }
764
765 static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
766 {
767 __be32 *p;
768 u32 w;
769
770 READ_BUF(4);
771 w = be32_to_cpup(p++);
772 *share_access = w & NFS4_SHARE_ACCESS_MASK;
773 *deleg_want = w & NFS4_SHARE_WANT_MASK;
774 if (deleg_when)
775 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
776
777 switch (w & NFS4_SHARE_ACCESS_MASK) {
778 case NFS4_SHARE_ACCESS_READ:
779 case NFS4_SHARE_ACCESS_WRITE:
780 case NFS4_SHARE_ACCESS_BOTH:
781 break;
782 default:
783 return nfserr_bad_xdr;
784 }
785 w &= ~NFS4_SHARE_ACCESS_MASK;
786 if (!w)
787 return nfs_ok;
788 if (!argp->minorversion)
789 return nfserr_bad_xdr;
790 switch (w & NFS4_SHARE_WANT_MASK) {
791 case NFS4_SHARE_WANT_NO_PREFERENCE:
792 case NFS4_SHARE_WANT_READ_DELEG:
793 case NFS4_SHARE_WANT_WRITE_DELEG:
794 case NFS4_SHARE_WANT_ANY_DELEG:
795 case NFS4_SHARE_WANT_NO_DELEG:
796 case NFS4_SHARE_WANT_CANCEL:
797 break;
798 default:
799 return nfserr_bad_xdr;
800 }
801 w &= ~NFS4_SHARE_WANT_MASK;
802 if (!w)
803 return nfs_ok;
804
805 if (!deleg_when) /* open_downgrade */
806 return nfserr_inval;
807 switch (w) {
808 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
809 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
810 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
811 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
812 return nfs_ok;
813 }
814 xdr_error:
815 return nfserr_bad_xdr;
816 }
817
818 static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
819 {
820 __be32 *p;
821
822 READ_BUF(4);
823 *x = be32_to_cpup(p++);
824 /* Note: unlinke access bits, deny bits may be zero. */
825 if (*x & ~NFS4_SHARE_DENY_BOTH)
826 return nfserr_bad_xdr;
827 return nfs_ok;
828 xdr_error:
829 return nfserr_bad_xdr;
830 }
831
832 static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
833 {
834 __be32 *p;
835
836 READ_BUF(4);
837 o->len = be32_to_cpup(p++);
838
839 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
840 return nfserr_bad_xdr;
841
842 READ_BUF(o->len);
843 SAVEMEM(o->data, o->len);
844 return nfs_ok;
845 xdr_error:
846 return nfserr_bad_xdr;
847 }
848
849 static __be32
850 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
851 {
852 DECODE_HEAD;
853 u32 dummy;
854
855 memset(open->op_bmval, 0, sizeof(open->op_bmval));
856 open->op_iattr.ia_valid = 0;
857 open->op_openowner = NULL;
858
859 open->op_xdr_error = 0;
860 /* seqid, share_access, share_deny, clientid, ownerlen */
861 READ_BUF(4);
862 open->op_seqid = be32_to_cpup(p++);
863 /* decode, yet ignore deleg_when until supported */
864 status = nfsd4_decode_share_access(argp, &open->op_share_access,
865 &open->op_deleg_want, &dummy);
866 if (status)
867 goto xdr_error;
868 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
869 if (status)
870 goto xdr_error;
871 READ_BUF(sizeof(clientid_t));
872 COPYMEM(&open->op_clientid, sizeof(clientid_t));
873 status = nfsd4_decode_opaque(argp, &open->op_owner);
874 if (status)
875 goto xdr_error;
876 READ_BUF(4);
877 open->op_create = be32_to_cpup(p++);
878 switch (open->op_create) {
879 case NFS4_OPEN_NOCREATE:
880 break;
881 case NFS4_OPEN_CREATE:
882 READ_BUF(4);
883 open->op_createmode = be32_to_cpup(p++);
884 switch (open->op_createmode) {
885 case NFS4_CREATE_UNCHECKED:
886 case NFS4_CREATE_GUARDED:
887 status = nfsd4_decode_fattr(argp, open->op_bmval,
888 &open->op_iattr, &open->op_acl, &open->op_label);
889 if (status)
890 goto out;
891 break;
892 case NFS4_CREATE_EXCLUSIVE:
893 READ_BUF(NFS4_VERIFIER_SIZE);
894 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
895 break;
896 case NFS4_CREATE_EXCLUSIVE4_1:
897 if (argp->minorversion < 1)
898 goto xdr_error;
899 READ_BUF(NFS4_VERIFIER_SIZE);
900 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
901 status = nfsd4_decode_fattr(argp, open->op_bmval,
902 &open->op_iattr, &open->op_acl, &open->op_label);
903 if (status)
904 goto out;
905 break;
906 default:
907 goto xdr_error;
908 }
909 break;
910 default:
911 goto xdr_error;
912 }
913
914 /* open_claim */
915 READ_BUF(4);
916 open->op_claim_type = be32_to_cpup(p++);
917 switch (open->op_claim_type) {
918 case NFS4_OPEN_CLAIM_NULL:
919 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
920 READ_BUF(4);
921 open->op_fname.len = be32_to_cpup(p++);
922 READ_BUF(open->op_fname.len);
923 SAVEMEM(open->op_fname.data, open->op_fname.len);
924 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
925 return status;
926 break;
927 case NFS4_OPEN_CLAIM_PREVIOUS:
928 READ_BUF(4);
929 open->op_delegate_type = be32_to_cpup(p++);
930 break;
931 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
932 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
933 if (status)
934 return status;
935 READ_BUF(4);
936 open->op_fname.len = be32_to_cpup(p++);
937 READ_BUF(open->op_fname.len);
938 SAVEMEM(open->op_fname.data, open->op_fname.len);
939 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
940 return status;
941 break;
942 case NFS4_OPEN_CLAIM_FH:
943 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
944 if (argp->minorversion < 1)
945 goto xdr_error;
946 /* void */
947 break;
948 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
949 if (argp->minorversion < 1)
950 goto xdr_error;
951 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
952 if (status)
953 return status;
954 break;
955 default:
956 goto xdr_error;
957 }
958
959 DECODE_TAIL;
960 }
961
962 static __be32
963 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
964 {
965 DECODE_HEAD;
966
967 if (argp->minorversion >= 1)
968 return nfserr_notsupp;
969
970 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
971 if (status)
972 return status;
973 READ_BUF(4);
974 open_conf->oc_seqid = be32_to_cpup(p++);
975
976 DECODE_TAIL;
977 }
978
979 static __be32
980 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
981 {
982 DECODE_HEAD;
983
984 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
985 if (status)
986 return status;
987 READ_BUF(4);
988 open_down->od_seqid = be32_to_cpup(p++);
989 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
990 &open_down->od_deleg_want, NULL);
991 if (status)
992 return status;
993 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
994 if (status)
995 return status;
996 DECODE_TAIL;
997 }
998
999 static __be32
1000 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
1001 {
1002 DECODE_HEAD;
1003
1004 READ_BUF(4);
1005 putfh->pf_fhlen = be32_to_cpup(p++);
1006 if (putfh->pf_fhlen > NFS4_FHSIZE)
1007 goto xdr_error;
1008 READ_BUF(putfh->pf_fhlen);
1009 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
1010
1011 DECODE_TAIL;
1012 }
1013
1014 static __be32
1015 nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1016 {
1017 if (argp->minorversion == 0)
1018 return nfs_ok;
1019 return nfserr_notsupp;
1020 }
1021
1022 static __be32
1023 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1024 {
1025 DECODE_HEAD;
1026
1027 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
1028 if (status)
1029 return status;
1030 READ_BUF(12);
1031 p = xdr_decode_hyper(p, &read->rd_offset);
1032 read->rd_length = be32_to_cpup(p++);
1033
1034 DECODE_TAIL;
1035 }
1036
1037 static __be32
1038 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1039 {
1040 DECODE_HEAD;
1041
1042 READ_BUF(24);
1043 p = xdr_decode_hyper(p, &readdir->rd_cookie);
1044 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
1045 readdir->rd_dircount = be32_to_cpup(p++);
1046 readdir->rd_maxcount = be32_to_cpup(p++);
1047 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
1048 goto out;
1049
1050 DECODE_TAIL;
1051 }
1052
1053 static __be32
1054 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1055 {
1056 DECODE_HEAD;
1057
1058 READ_BUF(4);
1059 remove->rm_namelen = be32_to_cpup(p++);
1060 READ_BUF(remove->rm_namelen);
1061 SAVEMEM(remove->rm_name, remove->rm_namelen);
1062 if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
1063 return status;
1064
1065 DECODE_TAIL;
1066 }
1067
1068 static __be32
1069 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1070 {
1071 DECODE_HEAD;
1072
1073 READ_BUF(4);
1074 rename->rn_snamelen = be32_to_cpup(p++);
1075 READ_BUF(rename->rn_snamelen);
1076 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
1077 READ_BUF(4);
1078 rename->rn_tnamelen = be32_to_cpup(p++);
1079 READ_BUF(rename->rn_tnamelen);
1080 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
1081 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
1082 return status;
1083 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
1084 return status;
1085
1086 DECODE_TAIL;
1087 }
1088
1089 static __be32
1090 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1091 {
1092 DECODE_HEAD;
1093
1094 if (argp->minorversion >= 1)
1095 return nfserr_notsupp;
1096
1097 READ_BUF(sizeof(clientid_t));
1098 COPYMEM(clientid, sizeof(clientid_t));
1099
1100 DECODE_TAIL;
1101 }
1102
1103 static __be32
1104 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1105 struct nfsd4_secinfo *secinfo)
1106 {
1107 DECODE_HEAD;
1108
1109 READ_BUF(4);
1110 secinfo->si_namelen = be32_to_cpup(p++);
1111 READ_BUF(secinfo->si_namelen);
1112 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
1113 status = check_filename(secinfo->si_name, secinfo->si_namelen);
1114 if (status)
1115 return status;
1116 DECODE_TAIL;
1117 }
1118
1119 static __be32
1120 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1121 struct nfsd4_secinfo_no_name *sin)
1122 {
1123 DECODE_HEAD;
1124
1125 READ_BUF(4);
1126 sin->sin_style = be32_to_cpup(p++);
1127 DECODE_TAIL;
1128 }
1129
1130 static __be32
1131 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1132 {
1133 __be32 status;
1134
1135 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1136 if (status)
1137 return status;
1138 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
1139 &setattr->sa_acl, &setattr->sa_label);
1140 }
1141
1142 static __be32
1143 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1144 {
1145 DECODE_HEAD;
1146
1147 if (argp->minorversion >= 1)
1148 return nfserr_notsupp;
1149
1150 READ_BUF(NFS4_VERIFIER_SIZE);
1151 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
1152
1153 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1154 if (status)
1155 return nfserr_bad_xdr;
1156 READ_BUF(8);
1157 setclientid->se_callback_prog = be32_to_cpup(p++);
1158 setclientid->se_callback_netid_len = be32_to_cpup(p++);
1159 READ_BUF(setclientid->se_callback_netid_len);
1160 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
1161 READ_BUF(4);
1162 setclientid->se_callback_addr_len = be32_to_cpup(p++);
1163
1164 READ_BUF(setclientid->se_callback_addr_len);
1165 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
1166 READ_BUF(4);
1167 setclientid->se_callback_ident = be32_to_cpup(p++);
1168
1169 DECODE_TAIL;
1170 }
1171
1172 static __be32
1173 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1174 {
1175 DECODE_HEAD;
1176
1177 if (argp->minorversion >= 1)
1178 return nfserr_notsupp;
1179
1180 READ_BUF(8 + NFS4_VERIFIER_SIZE);
1181 COPYMEM(&scd_c->sc_clientid, 8);
1182 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
1183
1184 DECODE_TAIL;
1185 }
1186
1187 /* Also used for NVERIFY */
1188 static __be32
1189 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1190 {
1191 DECODE_HEAD;
1192
1193 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1194 goto out;
1195
1196 /* For convenience's sake, we compare raw xdr'd attributes in
1197 * nfsd4_proc_verify */
1198
1199 READ_BUF(4);
1200 verify->ve_attrlen = be32_to_cpup(p++);
1201 READ_BUF(verify->ve_attrlen);
1202 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1203
1204 DECODE_TAIL;
1205 }
1206
1207 static __be32
1208 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1209 {
1210 int avail;
1211 int len;
1212 DECODE_HEAD;
1213
1214 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1215 if (status)
1216 return status;
1217 READ_BUF(16);
1218 p = xdr_decode_hyper(p, &write->wr_offset);
1219 write->wr_stable_how = be32_to_cpup(p++);
1220 if (write->wr_stable_how > 2)
1221 goto xdr_error;
1222 write->wr_buflen = be32_to_cpup(p++);
1223
1224 /* Sorry .. no magic macros for this.. *
1225 * READ_BUF(write->wr_buflen);
1226 * SAVEMEM(write->wr_buf, write->wr_buflen);
1227 */
1228 avail = (char*)argp->end - (char*)argp->p;
1229 if (avail + argp->pagelen < write->wr_buflen) {
1230 dprintk("NFSD: xdr error (%s:%d)\n",
1231 __FILE__, __LINE__);
1232 goto xdr_error;
1233 }
1234 write->wr_head.iov_base = p;
1235 write->wr_head.iov_len = avail;
1236 write->wr_pagelist = argp->pagelist;
1237
1238 len = XDR_QUADLEN(write->wr_buflen) << 2;
1239 if (len >= avail) {
1240 int pages;
1241
1242 len -= avail;
1243
1244 pages = len >> PAGE_SHIFT;
1245 argp->pagelist += pages;
1246 argp->pagelen -= pages * PAGE_SIZE;
1247 len -= pages * PAGE_SIZE;
1248
1249 argp->p = (__be32 *)page_address(argp->pagelist[0]);
1250 argp->pagelist++;
1251 argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE);
1252 }
1253 argp->p += XDR_QUADLEN(len);
1254
1255 DECODE_TAIL;
1256 }
1257
1258 static __be32
1259 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1260 {
1261 DECODE_HEAD;
1262
1263 if (argp->minorversion >= 1)
1264 return nfserr_notsupp;
1265
1266 READ_BUF(12);
1267 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1268 rlockowner->rl_owner.len = be32_to_cpup(p++);
1269 READ_BUF(rlockowner->rl_owner.len);
1270 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1271
1272 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1273 return nfserr_inval;
1274 DECODE_TAIL;
1275 }
1276
1277 static __be32
1278 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1279 struct nfsd4_exchange_id *exid)
1280 {
1281 int dummy, tmp;
1282 DECODE_HEAD;
1283
1284 READ_BUF(NFS4_VERIFIER_SIZE);
1285 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1286
1287 status = nfsd4_decode_opaque(argp, &exid->clname);
1288 if (status)
1289 return nfserr_bad_xdr;
1290
1291 READ_BUF(4);
1292 exid->flags = be32_to_cpup(p++);
1293
1294 /* Ignore state_protect4_a */
1295 READ_BUF(4);
1296 exid->spa_how = be32_to_cpup(p++);
1297 switch (exid->spa_how) {
1298 case SP4_NONE:
1299 break;
1300 case SP4_MACH_CRED:
1301 /* spo_must_enforce */
1302 status = nfsd4_decode_bitmap(argp,
1303 exid->spo_must_enforce);
1304 if (status)
1305 goto out;
1306 /* spo_must_allow */
1307 status = nfsd4_decode_bitmap(argp, exid->spo_must_allow);
1308 if (status)
1309 goto out;
1310 break;
1311 case SP4_SSV:
1312 /* ssp_ops */
1313 READ_BUF(4);
1314 dummy = be32_to_cpup(p++);
1315 READ_BUF(dummy * 4);
1316 p += dummy;
1317
1318 READ_BUF(4);
1319 dummy = be32_to_cpup(p++);
1320 READ_BUF(dummy * 4);
1321 p += dummy;
1322
1323 /* ssp_hash_algs<> */
1324 READ_BUF(4);
1325 tmp = be32_to_cpup(p++);
1326 while (tmp--) {
1327 READ_BUF(4);
1328 dummy = be32_to_cpup(p++);
1329 READ_BUF(dummy);
1330 p += XDR_QUADLEN(dummy);
1331 }
1332
1333 /* ssp_encr_algs<> */
1334 READ_BUF(4);
1335 tmp = be32_to_cpup(p++);
1336 while (tmp--) {
1337 READ_BUF(4);
1338 dummy = be32_to_cpup(p++);
1339 READ_BUF(dummy);
1340 p += XDR_QUADLEN(dummy);
1341 }
1342
1343 /* ssp_window and ssp_num_gss_handles */
1344 READ_BUF(8);
1345 dummy = be32_to_cpup(p++);
1346 dummy = be32_to_cpup(p++);
1347 break;
1348 default:
1349 goto xdr_error;
1350 }
1351
1352 /* Ignore Implementation ID */
1353 READ_BUF(4); /* nfs_impl_id4 array length */
1354 dummy = be32_to_cpup(p++);
1355
1356 if (dummy > 1)
1357 goto xdr_error;
1358
1359 if (dummy == 1) {
1360 /* nii_domain */
1361 READ_BUF(4);
1362 dummy = be32_to_cpup(p++);
1363 READ_BUF(dummy);
1364 p += XDR_QUADLEN(dummy);
1365
1366 /* nii_name */
1367 READ_BUF(4);
1368 dummy = be32_to_cpup(p++);
1369 READ_BUF(dummy);
1370 p += XDR_QUADLEN(dummy);
1371
1372 /* nii_date */
1373 READ_BUF(12);
1374 p += 3;
1375 }
1376 DECODE_TAIL;
1377 }
1378
1379 static __be32
1380 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1381 struct nfsd4_create_session *sess)
1382 {
1383 DECODE_HEAD;
1384 u32 dummy;
1385
1386 READ_BUF(16);
1387 COPYMEM(&sess->clientid, 8);
1388 sess->seqid = be32_to_cpup(p++);
1389 sess->flags = be32_to_cpup(p++);
1390
1391 /* Fore channel attrs */
1392 READ_BUF(28);
1393 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1394 sess->fore_channel.maxreq_sz = be32_to_cpup(p++);
1395 sess->fore_channel.maxresp_sz = be32_to_cpup(p++);
1396 sess->fore_channel.maxresp_cached = be32_to_cpup(p++);
1397 sess->fore_channel.maxops = be32_to_cpup(p++);
1398 sess->fore_channel.maxreqs = be32_to_cpup(p++);
1399 sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++);
1400 if (sess->fore_channel.nr_rdma_attrs == 1) {
1401 READ_BUF(4);
1402 sess->fore_channel.rdma_attrs = be32_to_cpup(p++);
1403 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1404 dprintk("Too many fore channel attr bitmaps!\n");
1405 goto xdr_error;
1406 }
1407
1408 /* Back channel attrs */
1409 READ_BUF(28);
1410 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1411 sess->back_channel.maxreq_sz = be32_to_cpup(p++);
1412 sess->back_channel.maxresp_sz = be32_to_cpup(p++);
1413 sess->back_channel.maxresp_cached = be32_to_cpup(p++);
1414 sess->back_channel.maxops = be32_to_cpup(p++);
1415 sess->back_channel.maxreqs = be32_to_cpup(p++);
1416 sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++);
1417 if (sess->back_channel.nr_rdma_attrs == 1) {
1418 READ_BUF(4);
1419 sess->back_channel.rdma_attrs = be32_to_cpup(p++);
1420 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1421 dprintk("Too many back channel attr bitmaps!\n");
1422 goto xdr_error;
1423 }
1424
1425 READ_BUF(4);
1426 sess->callback_prog = be32_to_cpup(p++);
1427 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
1428 DECODE_TAIL;
1429 }
1430
1431 static __be32
1432 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1433 struct nfsd4_destroy_session *destroy_session)
1434 {
1435 DECODE_HEAD;
1436 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1437 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1438
1439 DECODE_TAIL;
1440 }
1441
1442 static __be32
1443 nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1444 struct nfsd4_free_stateid *free_stateid)
1445 {
1446 DECODE_HEAD;
1447
1448 READ_BUF(sizeof(stateid_t));
1449 free_stateid->fr_stateid.si_generation = be32_to_cpup(p++);
1450 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1451
1452 DECODE_TAIL;
1453 }
1454
1455 static __be32
1456 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1457 struct nfsd4_sequence *seq)
1458 {
1459 DECODE_HEAD;
1460
1461 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1462 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1463 seq->seqid = be32_to_cpup(p++);
1464 seq->slotid = be32_to_cpup(p++);
1465 seq->maxslots = be32_to_cpup(p++);
1466 seq->cachethis = be32_to_cpup(p++);
1467
1468 DECODE_TAIL;
1469 }
1470
1471 static __be32
1472 nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1473 {
1474 int i;
1475 __be32 *p, status;
1476 struct nfsd4_test_stateid_id *stateid;
1477
1478 READ_BUF(4);
1479 test_stateid->ts_num_ids = ntohl(*p++);
1480
1481 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
1482
1483 for (i = 0; i < test_stateid->ts_num_ids; i++) {
1484 stateid = svcxdr_tmpalloc(argp, sizeof(*stateid));
1485 if (!stateid) {
1486 status = nfserrno(-ENOMEM);
1487 goto out;
1488 }
1489
1490 INIT_LIST_HEAD(&stateid->ts_id_list);
1491 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1492
1493 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
1494 if (status)
1495 goto out;
1496 }
1497
1498 status = 0;
1499 out:
1500 return status;
1501 xdr_error:
1502 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1503 status = nfserr_bad_xdr;
1504 goto out;
1505 }
1506
1507 static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1508 {
1509 DECODE_HEAD;
1510
1511 READ_BUF(8);
1512 COPYMEM(&dc->clientid, 8);
1513
1514 DECODE_TAIL;
1515 }
1516
1517 static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1518 {
1519 DECODE_HEAD;
1520
1521 READ_BUF(4);
1522 rc->rca_one_fs = be32_to_cpup(p++);
1523
1524 DECODE_TAIL;
1525 }
1526
1527 #ifdef CONFIG_NFSD_PNFS
1528 static __be32
1529 nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp,
1530 struct nfsd4_getdeviceinfo *gdev)
1531 {
1532 DECODE_HEAD;
1533 u32 num, i;
1534
1535 READ_BUF(sizeof(struct nfsd4_deviceid) + 3 * 4);
1536 COPYMEM(&gdev->gd_devid, sizeof(struct nfsd4_deviceid));
1537 gdev->gd_layout_type = be32_to_cpup(p++);
1538 gdev->gd_maxcount = be32_to_cpup(p++);
1539 num = be32_to_cpup(p++);
1540 if (num) {
1541 READ_BUF(4 * num);
1542 gdev->gd_notify_types = be32_to_cpup(p++);
1543 for (i = 1; i < num; i++) {
1544 if (be32_to_cpup(p++)) {
1545 status = nfserr_inval;
1546 goto out;
1547 }
1548 }
1549 }
1550 DECODE_TAIL;
1551 }
1552
1553 static __be32
1554 nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp,
1555 struct nfsd4_layoutget *lgp)
1556 {
1557 DECODE_HEAD;
1558
1559 READ_BUF(36);
1560 lgp->lg_signal = be32_to_cpup(p++);
1561 lgp->lg_layout_type = be32_to_cpup(p++);
1562 lgp->lg_seg.iomode = be32_to_cpup(p++);
1563 p = xdr_decode_hyper(p, &lgp->lg_seg.offset);
1564 p = xdr_decode_hyper(p, &lgp->lg_seg.length);
1565 p = xdr_decode_hyper(p, &lgp->lg_minlength);
1566
1567 status = nfsd4_decode_stateid(argp, &lgp->lg_sid);
1568 if (status)
1569 return status;
1570
1571 READ_BUF(4);
1572 lgp->lg_maxcount = be32_to_cpup(p++);
1573
1574 DECODE_TAIL;
1575 }
1576
1577 static __be32
1578 nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp,
1579 struct nfsd4_layoutcommit *lcp)
1580 {
1581 DECODE_HEAD;
1582 u32 timechange;
1583
1584 READ_BUF(20);
1585 p = xdr_decode_hyper(p, &lcp->lc_seg.offset);
1586 p = xdr_decode_hyper(p, &lcp->lc_seg.length);
1587 lcp->lc_reclaim = be32_to_cpup(p++);
1588
1589 status = nfsd4_decode_stateid(argp, &lcp->lc_sid);
1590 if (status)
1591 return status;
1592
1593 READ_BUF(4);
1594 lcp->lc_newoffset = be32_to_cpup(p++);
1595 if (lcp->lc_newoffset) {
1596 READ_BUF(8);
1597 p = xdr_decode_hyper(p, &lcp->lc_last_wr);
1598 } else
1599 lcp->lc_last_wr = 0;
1600 READ_BUF(4);
1601 timechange = be32_to_cpup(p++);
1602 if (timechange) {
1603 status = nfsd4_decode_time(argp, &lcp->lc_mtime);
1604 if (status)
1605 return status;
1606 } else {
1607 lcp->lc_mtime.tv_nsec = UTIME_NOW;
1608 }
1609 READ_BUF(8);
1610 lcp->lc_layout_type = be32_to_cpup(p++);
1611
1612 /*
1613 * Save the layout update in XDR format and let the layout driver deal
1614 * with it later.
1615 */
1616 lcp->lc_up_len = be32_to_cpup(p++);
1617 if (lcp->lc_up_len > 0) {
1618 READ_BUF(lcp->lc_up_len);
1619 READMEM(lcp->lc_up_layout, lcp->lc_up_len);
1620 }
1621
1622 DECODE_TAIL;
1623 }
1624
1625 static __be32
1626 nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp,
1627 struct nfsd4_layoutreturn *lrp)
1628 {
1629 DECODE_HEAD;
1630
1631 READ_BUF(16);
1632 lrp->lr_reclaim = be32_to_cpup(p++);
1633 lrp->lr_layout_type = be32_to_cpup(p++);
1634 lrp->lr_seg.iomode = be32_to_cpup(p++);
1635 lrp->lr_return_type = be32_to_cpup(p++);
1636 if (lrp->lr_return_type == RETURN_FILE) {
1637 READ_BUF(16);
1638 p = xdr_decode_hyper(p, &lrp->lr_seg.offset);
1639 p = xdr_decode_hyper(p, &lrp->lr_seg.length);
1640
1641 status = nfsd4_decode_stateid(argp, &lrp->lr_sid);
1642 if (status)
1643 return status;
1644
1645 READ_BUF(4);
1646 lrp->lrf_body_len = be32_to_cpup(p++);
1647 if (lrp->lrf_body_len > 0) {
1648 READ_BUF(lrp->lrf_body_len);
1649 READMEM(lrp->lrf_body, lrp->lrf_body_len);
1650 }
1651 } else {
1652 lrp->lr_seg.offset = 0;
1653 lrp->lr_seg.length = NFS4_MAX_UINT64;
1654 }
1655
1656 DECODE_TAIL;
1657 }
1658 #endif /* CONFIG_NFSD_PNFS */
1659
1660 static __be32
1661 nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp,
1662 struct nfsd4_fallocate *fallocate)
1663 {
1664 DECODE_HEAD;
1665
1666 status = nfsd4_decode_stateid(argp, &fallocate->falloc_stateid);
1667 if (status)
1668 return status;
1669
1670 READ_BUF(16);
1671 p = xdr_decode_hyper(p, &fallocate->falloc_offset);
1672 xdr_decode_hyper(p, &fallocate->falloc_length);
1673
1674 DECODE_TAIL;
1675 }
1676
1677 static __be32
1678 nfsd4_decode_clone(struct nfsd4_compoundargs *argp, struct nfsd4_clone *clone)
1679 {
1680 DECODE_HEAD;
1681
1682 status = nfsd4_decode_stateid(argp, &clone->cl_src_stateid);
1683 if (status)
1684 return status;
1685 status = nfsd4_decode_stateid(argp, &clone->cl_dst_stateid);
1686 if (status)
1687 return status;
1688
1689 READ_BUF(8 + 8 + 8);
1690 p = xdr_decode_hyper(p, &clone->cl_src_pos);
1691 p = xdr_decode_hyper(p, &clone->cl_dst_pos);
1692 p = xdr_decode_hyper(p, &clone->cl_count);
1693 DECODE_TAIL;
1694 }
1695
1696 static __be32
1697 nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy)
1698 {
1699 DECODE_HEAD;
1700 unsigned int tmp;
1701
1702 status = nfsd4_decode_stateid(argp, &copy->cp_src_stateid);
1703 if (status)
1704 return status;
1705 status = nfsd4_decode_stateid(argp, &copy->cp_dst_stateid);
1706 if (status)
1707 return status;
1708
1709 READ_BUF(8 + 8 + 8 + 4 + 4 + 4);
1710 p = xdr_decode_hyper(p, &copy->cp_src_pos);
1711 p = xdr_decode_hyper(p, &copy->cp_dst_pos);
1712 p = xdr_decode_hyper(p, &copy->cp_count);
1713 copy->cp_consecutive = be32_to_cpup(p++);
1714 copy->cp_synchronous = be32_to_cpup(p++);
1715 tmp = be32_to_cpup(p); /* Source server list not supported */
1716
1717 DECODE_TAIL;
1718 }
1719
1720 static __be32
1721 nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek)
1722 {
1723 DECODE_HEAD;
1724
1725 status = nfsd4_decode_stateid(argp, &seek->seek_stateid);
1726 if (status)
1727 return status;
1728
1729 READ_BUF(8 + 4);
1730 p = xdr_decode_hyper(p, &seek->seek_offset);
1731 seek->seek_whence = be32_to_cpup(p);
1732
1733 DECODE_TAIL;
1734 }
1735
1736 static __be32
1737 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1738 {
1739 return nfs_ok;
1740 }
1741
1742 static __be32
1743 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1744 {
1745 return nfserr_notsupp;
1746 }
1747
1748 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1749
1750 static nfsd4_dec nfsd4_dec_ops[] = {
1751 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1752 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1753 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1754 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1755 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1756 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1757 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1758 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1759 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1760 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1761 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1762 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1763 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1764 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1765 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1766 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1767 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1768 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1769 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1770 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1771 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
1772 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1773 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1774 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1775 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1776 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1777 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1778 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1779 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1780 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1781 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1782 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1783 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1784 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1785 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1786 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1787 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
1788
1789 /* new operations for NFSv4.1 */
1790 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1791 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
1792 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1793 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1794 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
1795 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
1796 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1797 #ifdef CONFIG_NFSD_PNFS
1798 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo,
1799 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1800 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit,
1801 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget,
1802 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn,
1803 #else
1804 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1805 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1806 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1807 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1808 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
1809 #endif
1810 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
1811 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1812 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
1813 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
1814 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1815 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
1816 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
1817
1818 /* new operations for NFSv4.2 */
1819 [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
1820 [OP_COPY] = (nfsd4_dec)nfsd4_decode_copy,
1821 [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_notsupp,
1822 [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
1823 [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp,
1824 [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp,
1825 [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp,
1826 [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_notsupp,
1827 [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_notsupp,
1828 [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_notsupp,
1829 [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek,
1830 [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp,
1831 [OP_CLONE] = (nfsd4_dec)nfsd4_decode_clone,
1832 };
1833
1834 static inline bool
1835 nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
1836 {
1837 if (op->opnum < FIRST_NFS4_OP)
1838 return false;
1839 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
1840 return false;
1841 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
1842 return false;
1843 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
1844 return false;
1845 return true;
1846 }
1847
1848 static __be32
1849 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1850 {
1851 DECODE_HEAD;
1852 struct nfsd4_op *op;
1853 bool cachethis = false;
1854 int auth_slack= argp->rqstp->rq_auth_slack;
1855 int max_reply = auth_slack + 8; /* opcnt, status */
1856 int readcount = 0;
1857 int readbytes = 0;
1858 int i;
1859
1860 READ_BUF(4);
1861 argp->taglen = be32_to_cpup(p++);
1862 READ_BUF(argp->taglen);
1863 SAVEMEM(argp->tag, argp->taglen);
1864 READ_BUF(8);
1865 argp->minorversion = be32_to_cpup(p++);
1866 argp->opcnt = be32_to_cpup(p++);
1867 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
1868
1869 if (argp->taglen > NFSD4_MAX_TAGLEN)
1870 goto xdr_error;
1871 if (argp->opcnt > 100)
1872 goto xdr_error;
1873
1874 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1875 argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1876 if (!argp->ops) {
1877 argp->ops = argp->iops;
1878 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1879 goto xdr_error;
1880 }
1881 }
1882
1883 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
1884 argp->opcnt = 0;
1885
1886 for (i = 0; i < argp->opcnt; i++) {
1887 op = &argp->ops[i];
1888 op->replay = NULL;
1889
1890 READ_BUF(4);
1891 op->opnum = be32_to_cpup(p++);
1892
1893 if (nfsd4_opnum_in_range(argp, op))
1894 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
1895 else {
1896 op->opnum = OP_ILLEGAL;
1897 op->status = nfserr_op_illegal;
1898 }
1899 /*
1900 * We'll try to cache the result in the DRC if any one
1901 * op in the compound wants to be cached:
1902 */
1903 cachethis |= nfsd4_cache_this_op(op);
1904
1905 if (op->opnum == OP_READ) {
1906 readcount++;
1907 readbytes += nfsd4_max_reply(argp->rqstp, op);
1908 } else
1909 max_reply += nfsd4_max_reply(argp->rqstp, op);
1910 /*
1911 * OP_LOCK may return a conflicting lock. (Special case
1912 * because it will just skip encoding this if it runs
1913 * out of xdr buffer space, and it is the only operation
1914 * that behaves this way.)
1915 */
1916 if (op->opnum == OP_LOCK)
1917 max_reply += NFS4_OPAQUE_LIMIT;
1918
1919 if (op->status) {
1920 argp->opcnt = i+1;
1921 break;
1922 }
1923 }
1924 /* Sessions make the DRC unnecessary: */
1925 if (argp->minorversion)
1926 cachethis = false;
1927 svc_reserve(argp->rqstp, max_reply + readbytes);
1928 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1929
1930 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
1931 clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags);
1932
1933 DECODE_TAIL;
1934 }
1935
1936 static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode)
1937 {
1938 if (IS_I_VERSION(inode)) {
1939 p = xdr_encode_hyper(p, inode->i_version);
1940 } else {
1941 *p++ = cpu_to_be32(stat->ctime.tv_sec);
1942 *p++ = cpu_to_be32(stat->ctime.tv_nsec);
1943 }
1944 return p;
1945 }
1946
1947 static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
1948 {
1949 *p++ = cpu_to_be32(c->atomic);
1950 if (c->change_supported) {
1951 p = xdr_encode_hyper(p, c->before_change);
1952 p = xdr_encode_hyper(p, c->after_change);
1953 } else {
1954 *p++ = cpu_to_be32(c->before_ctime_sec);
1955 *p++ = cpu_to_be32(c->before_ctime_nsec);
1956 *p++ = cpu_to_be32(c->after_ctime_sec);
1957 *p++ = cpu_to_be32(c->after_ctime_nsec);
1958 }
1959 return p;
1960 }
1961
1962 /* Encode as an array of strings the string given with components
1963 * separated @sep, escaped with esc_enter and esc_exit.
1964 */
1965 static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
1966 char *components, char esc_enter,
1967 char esc_exit)
1968 {
1969 __be32 *p;
1970 __be32 pathlen;
1971 int pathlen_offset;
1972 int strlen, count=0;
1973 char *str, *end, *next;
1974
1975 dprintk("nfsd4_encode_components(%s)\n", components);
1976
1977 pathlen_offset = xdr->buf->len;
1978 p = xdr_reserve_space(xdr, 4);
1979 if (!p)
1980 return nfserr_resource;
1981 p++; /* We will fill this in with @count later */
1982
1983 end = str = components;
1984 while (*end) {
1985 bool found_esc = false;
1986
1987 /* try to parse as esc_start, ..., esc_end, sep */
1988 if (*str == esc_enter) {
1989 for (; *end && (*end != esc_exit); end++)
1990 /* find esc_exit or end of string */;
1991 next = end + 1;
1992 if (*end && (!*next || *next == sep)) {
1993 str++;
1994 found_esc = true;
1995 }
1996 }
1997
1998 if (!found_esc)
1999 for (; *end && (*end != sep); end++)
2000 /* find sep or end of string */;
2001
2002 strlen = end - str;
2003 if (strlen) {
2004 p = xdr_reserve_space(xdr, strlen + 4);
2005 if (!p)
2006 return nfserr_resource;
2007 p = xdr_encode_opaque(p, str, strlen);
2008 count++;
2009 }
2010 else
2011 end++;
2012 if (found_esc)
2013 end = next;
2014
2015 str = end;
2016 }
2017 pathlen = htonl(count);
2018 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
2019 return 0;
2020 }
2021
2022 /* Encode as an array of strings the string given with components
2023 * separated @sep.
2024 */
2025 static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
2026 char *components)
2027 {
2028 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
2029 }
2030
2031 /*
2032 * encode a location element of a fs_locations structure
2033 */
2034 static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
2035 struct nfsd4_fs_location *location)
2036 {
2037 __be32 status;
2038
2039 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
2040 '[', ']');
2041 if (status)
2042 return status;
2043 status = nfsd4_encode_components(xdr, '/', location->path);
2044 if (status)
2045 return status;
2046 return 0;
2047 }
2048
2049 /*
2050 * Encode a path in RFC3530 'pathname4' format
2051 */
2052 static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
2053 const struct path *root,
2054 const struct path *path)
2055 {
2056 struct path cur = *path;
2057 __be32 *p;
2058 struct dentry **components = NULL;
2059 unsigned int ncomponents = 0;
2060 __be32 err = nfserr_jukebox;
2061
2062 dprintk("nfsd4_encode_components(");
2063
2064 path_get(&cur);
2065 /* First walk the path up to the nfsd root, and store the
2066 * dentries/path components in an array.
2067 */
2068 for (;;) {
2069 if (path_equal(&cur, root))
2070 break;
2071 if (cur.dentry == cur.mnt->mnt_root) {
2072 if (follow_up(&cur))
2073 continue;
2074 goto out_free;
2075 }
2076 if ((ncomponents & 15) == 0) {
2077 struct dentry **new;
2078 new = krealloc(components,
2079 sizeof(*new) * (ncomponents + 16),
2080 GFP_KERNEL);
2081 if (!new)
2082 goto out_free;
2083 components = new;
2084 }
2085 components[ncomponents++] = cur.dentry;
2086 cur.dentry = dget_parent(cur.dentry);
2087 }
2088 err = nfserr_resource;
2089 p = xdr_reserve_space(xdr, 4);
2090 if (!p)
2091 goto out_free;
2092 *p++ = cpu_to_be32(ncomponents);
2093
2094 while (ncomponents) {
2095 struct dentry *dentry = components[ncomponents - 1];
2096 unsigned int len;
2097
2098 spin_lock(&dentry->d_lock);
2099 len = dentry->d_name.len;
2100 p = xdr_reserve_space(xdr, len + 4);
2101 if (!p) {
2102 spin_unlock(&dentry->d_lock);
2103 goto out_free;
2104 }
2105 p = xdr_encode_opaque(p, dentry->d_name.name, len);
2106 dprintk("/%pd", dentry);
2107 spin_unlock(&dentry->d_lock);
2108 dput(dentry);
2109 ncomponents--;
2110 }
2111
2112 err = 0;
2113 out_free:
2114 dprintk(")\n");
2115 while (ncomponents)
2116 dput(components[--ncomponents]);
2117 kfree(components);
2118 path_put(&cur);
2119 return err;
2120 }
2121
2122 static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
2123 struct svc_rqst *rqstp, const struct path *path)
2124 {
2125 struct svc_export *exp_ps;
2126 __be32 res;
2127
2128 exp_ps = rqst_find_fsidzero_export(rqstp);
2129 if (IS_ERR(exp_ps))
2130 return nfserrno(PTR_ERR(exp_ps));
2131 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
2132 exp_put(exp_ps);
2133 return res;
2134 }
2135
2136 /*
2137 * encode a fs_locations structure
2138 */
2139 static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
2140 struct svc_rqst *rqstp, struct svc_export *exp)
2141 {
2142 __be32 status;
2143 int i;
2144 __be32 *p;
2145 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
2146
2147 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
2148 if (status)
2149 return status;
2150 p = xdr_reserve_space(xdr, 4);
2151 if (!p)
2152 return nfserr_resource;
2153 *p++ = cpu_to_be32(fslocs->locations_count);
2154 for (i=0; i<fslocs->locations_count; i++) {
2155 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
2156 if (status)
2157 return status;
2158 }
2159 return 0;
2160 }
2161
2162 static u32 nfs4_file_type(umode_t mode)
2163 {
2164 switch (mode & S_IFMT) {
2165 case S_IFIFO: return NF4FIFO;
2166 case S_IFCHR: return NF4CHR;
2167 case S_IFDIR: return NF4DIR;
2168 case S_IFBLK: return NF4BLK;
2169 case S_IFLNK: return NF4LNK;
2170 case S_IFREG: return NF4REG;
2171 case S_IFSOCK: return NF4SOCK;
2172 default: return NF4BAD;
2173 };
2174 }
2175
2176 static inline __be32
2177 nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2178 struct nfs4_ace *ace)
2179 {
2180 if (ace->whotype != NFS4_ACL_WHO_NAMED)
2181 return nfs4_acl_write_who(xdr, ace->whotype);
2182 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
2183 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
2184 else
2185 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
2186 }
2187
2188 static inline __be32
2189 nfsd4_encode_layout_types(struct xdr_stream *xdr, u32 layout_types)
2190 {
2191 __be32 *p;
2192 unsigned long i = hweight_long(layout_types);
2193
2194 p = xdr_reserve_space(xdr, 4 + 4 * i);
2195 if (!p)
2196 return nfserr_resource;
2197
2198 *p++ = cpu_to_be32(i);
2199
2200 for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i)
2201 if (layout_types & (1 << i))
2202 *p++ = cpu_to_be32(i);
2203
2204 return 0;
2205 }
2206
2207 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
2208 FATTR4_WORD0_RDATTR_ERROR)
2209 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
2210 #define WORD2_ABSENT_FS_ATTRS 0
2211
2212 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2213 static inline __be32
2214 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2215 void *context, int len)
2216 {
2217 __be32 *p;
2218
2219 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
2220 if (!p)
2221 return nfserr_resource;
2222
2223 /*
2224 * For now we use a 0 here to indicate the null translation; in
2225 * the future we may place a call to translation code here.
2226 */
2227 *p++ = cpu_to_be32(0); /* lfs */
2228 *p++ = cpu_to_be32(0); /* pi */
2229 p = xdr_encode_opaque(p, context, len);
2230 return 0;
2231 }
2232 #else
2233 static inline __be32
2234 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2235 void *context, int len)
2236 { return 0; }
2237 #endif
2238
2239 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err)
2240 {
2241 /* As per referral draft: */
2242 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2243 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2244 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2245 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2246 *rdattr_err = NFSERR_MOVED;
2247 else
2248 return nfserr_moved;
2249 }
2250 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2251 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
2252 *bmval2 &= WORD2_ABSENT_FS_ATTRS;
2253 return 0;
2254 }
2255
2256
2257 static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2258 {
2259 struct path path = exp->ex_path;
2260 int err;
2261
2262 path_get(&path);
2263 while (follow_up(&path)) {
2264 if (path.dentry != path.mnt->mnt_root)
2265 break;
2266 }
2267 err = vfs_getattr(&path, stat);
2268 path_put(&path);
2269 return err;
2270 }
2271
2272 static __be32
2273 nfsd4_encode_bitmap(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2)
2274 {
2275 __be32 *p;
2276
2277 if (bmval2) {
2278 p = xdr_reserve_space(xdr, 16);
2279 if (!p)
2280 goto out_resource;
2281 *p++ = cpu_to_be32(3);
2282 *p++ = cpu_to_be32(bmval0);
2283 *p++ = cpu_to_be32(bmval1);
2284 *p++ = cpu_to_be32(bmval2);
2285 } else if (bmval1) {
2286 p = xdr_reserve_space(xdr, 12);
2287 if (!p)
2288 goto out_resource;
2289 *p++ = cpu_to_be32(2);
2290 *p++ = cpu_to_be32(bmval0);
2291 *p++ = cpu_to_be32(bmval1);
2292 } else {
2293 p = xdr_reserve_space(xdr, 8);
2294 if (!p)
2295 goto out_resource;
2296 *p++ = cpu_to_be32(1);
2297 *p++ = cpu_to_be32(bmval0);
2298 }
2299
2300 return 0;
2301 out_resource:
2302 return nfserr_resource;
2303 }
2304
2305 /*
2306 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2307 * ourselves.
2308 */
2309 static __be32
2310 nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2311 struct svc_export *exp,
2312 struct dentry *dentry, u32 *bmval,
2313 struct svc_rqst *rqstp, int ignore_crossmnt)
2314 {
2315 u32 bmval0 = bmval[0];
2316 u32 bmval1 = bmval[1];
2317 u32 bmval2 = bmval[2];
2318 struct kstat stat;
2319 struct svc_fh *tempfh = NULL;
2320 struct kstatfs statfs;
2321 __be32 *p;
2322 int starting_len = xdr->buf->len;
2323 int attrlen_offset;
2324 __be32 attrlen;
2325 u32 dummy;
2326 u64 dummy64;
2327 u32 rdattr_err = 0;
2328 __be32 status;
2329 int err;
2330 struct nfs4_acl *acl = NULL;
2331 void *context = NULL;
2332 int contextlen;
2333 bool contextsupport = false;
2334 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2335 u32 minorversion = resp->cstate.minorversion;
2336 struct path path = {
2337 .mnt = exp->ex_path.mnt,
2338 .dentry = dentry,
2339 };
2340 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2341
2342 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
2343 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
2344 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
2345 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
2346
2347 if (exp->ex_fslocs.migrated) {
2348 status = fattr_handle_absent_fs(&bmval0, &bmval1, &bmval2, &rdattr_err);
2349 if (status)
2350 goto out;
2351 }
2352
2353 err = vfs_getattr(&path, &stat);
2354 if (err)
2355 goto out_nfserr;
2356 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2357 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
2358 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2359 FATTR4_WORD1_SPACE_TOTAL))) {
2360 err = vfs_statfs(&path, &statfs);
2361 if (err)
2362 goto out_nfserr;
2363 }
2364 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
2365 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2366 status = nfserr_jukebox;
2367 if (!tempfh)
2368 goto out;
2369 fh_init(tempfh, NFS4_FHSIZE);
2370 status = fh_compose(tempfh, exp, dentry, NULL);
2371 if (status)
2372 goto out;
2373 fhp = tempfh;
2374 }
2375 if (bmval0 & FATTR4_WORD0_ACL) {
2376 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2377 if (err == -EOPNOTSUPP)
2378 bmval0 &= ~FATTR4_WORD0_ACL;
2379 else if (err == -EINVAL) {
2380 status = nfserr_attrnotsupp;
2381 goto out;
2382 } else if (err != 0)
2383 goto out_nfserr;
2384 }
2385
2386 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2387 if ((bmval2 & FATTR4_WORD2_SECURITY_LABEL) ||
2388 bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2389 err = security_inode_getsecctx(d_inode(dentry),
2390 &context, &contextlen);
2391 contextsupport = (err == 0);
2392 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2393 if (err == -EOPNOTSUPP)
2394 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2395 else if (err)
2396 goto out_nfserr;
2397 }
2398 }
2399 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2400
2401 status = nfsd4_encode_bitmap(xdr, bmval0, bmval1, bmval2);
2402 if (status)
2403 goto out;
2404
2405 attrlen_offset = xdr->buf->len;
2406 p = xdr_reserve_space(xdr, 4);
2407 if (!p)
2408 goto out_resource;
2409 p++; /* to be backfilled later */
2410
2411 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2412 u32 word0 = nfsd_suppattrs0(minorversion);
2413 u32 word1 = nfsd_suppattrs1(minorversion);
2414 u32 word2 = nfsd_suppattrs2(minorversion);
2415
2416 if (!IS_POSIXACL(dentry->d_inode))
2417 word0 &= ~FATTR4_WORD0_ACL;
2418 if (!contextsupport)
2419 word2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2420 if (!word2) {
2421 p = xdr_reserve_space(xdr, 12);
2422 if (!p)
2423 goto out_resource;
2424 *p++ = cpu_to_be32(2);
2425 *p++ = cpu_to_be32(word0);
2426 *p++ = cpu_to_be32(word1);
2427 } else {
2428 p = xdr_reserve_space(xdr, 16);
2429 if (!p)
2430 goto out_resource;
2431 *p++ = cpu_to_be32(3);
2432 *p++ = cpu_to_be32(word0);
2433 *p++ = cpu_to_be32(word1);
2434 *p++ = cpu_to_be32(word2);
2435 }
2436 }
2437 if (bmval0 & FATTR4_WORD0_TYPE) {
2438 p = xdr_reserve_space(xdr, 4);
2439 if (!p)
2440 goto out_resource;
2441 dummy = nfs4_file_type(stat.mode);
2442 if (dummy == NF4BAD) {
2443 status = nfserr_serverfault;
2444 goto out;
2445 }
2446 *p++ = cpu_to_be32(dummy);
2447 }
2448 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
2449 p = xdr_reserve_space(xdr, 4);
2450 if (!p)
2451 goto out_resource;
2452 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
2453 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
2454 else
2455 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2456 NFS4_FH_VOL_RENAME);
2457 }
2458 if (bmval0 & FATTR4_WORD0_CHANGE) {
2459 p = xdr_reserve_space(xdr, 8);
2460 if (!p)
2461 goto out_resource;
2462 p = encode_change(p, &stat, d_inode(dentry));
2463 }
2464 if (bmval0 & FATTR4_WORD0_SIZE) {
2465 p = xdr_reserve_space(xdr, 8);
2466 if (!p)
2467 goto out_resource;
2468 p = xdr_encode_hyper(p, stat.size);
2469 }
2470 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
2471 p = xdr_reserve_space(xdr, 4);
2472 if (!p)
2473 goto out_resource;
2474 *p++ = cpu_to_be32(1);
2475 }
2476 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
2477 p = xdr_reserve_space(xdr, 4);
2478 if (!p)
2479 goto out_resource;
2480 *p++ = cpu_to_be32(1);
2481 }
2482 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
2483 p = xdr_reserve_space(xdr, 4);
2484 if (!p)
2485 goto out_resource;
2486 *p++ = cpu_to_be32(0);
2487 }
2488 if (bmval0 & FATTR4_WORD0_FSID) {
2489 p = xdr_reserve_space(xdr, 16);
2490 if (!p)
2491 goto out_resource;
2492 if (exp->ex_fslocs.migrated) {
2493 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
2494 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
2495 } else switch(fsid_source(fhp)) {
2496 case FSIDSOURCE_FSID:
2497 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
2498 p = xdr_encode_hyper(p, (u64)0);
2499 break;
2500 case FSIDSOURCE_DEV:
2501 *p++ = cpu_to_be32(0);
2502 *p++ = cpu_to_be32(MAJOR(stat.dev));
2503 *p++ = cpu_to_be32(0);
2504 *p++ = cpu_to_be32(MINOR(stat.dev));
2505 break;
2506 case FSIDSOURCE_UUID:
2507 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
2508 EX_UUID_LEN);
2509 break;
2510 }
2511 }
2512 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
2513 p = xdr_reserve_space(xdr, 4);
2514 if (!p)
2515 goto out_resource;
2516 *p++ = cpu_to_be32(0);
2517 }
2518 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
2519 p = xdr_reserve_space(xdr, 4);
2520 if (!p)
2521 goto out_resource;
2522 *p++ = cpu_to_be32(nn->nfsd4_lease);
2523 }
2524 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
2525 p = xdr_reserve_space(xdr, 4);
2526 if (!p)
2527 goto out_resource;
2528 *p++ = cpu_to_be32(rdattr_err);
2529 }
2530 if (bmval0 & FATTR4_WORD0_ACL) {
2531 struct nfs4_ace *ace;
2532
2533 if (acl == NULL) {
2534 p = xdr_reserve_space(xdr, 4);
2535 if (!p)
2536 goto out_resource;
2537
2538 *p++ = cpu_to_be32(0);
2539 goto out_acl;
2540 }
2541 p = xdr_reserve_space(xdr, 4);
2542 if (!p)
2543 goto out_resource;
2544 *p++ = cpu_to_be32(acl->naces);
2545
2546 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
2547 p = xdr_reserve_space(xdr, 4*3);
2548 if (!p)
2549 goto out_resource;
2550 *p++ = cpu_to_be32(ace->type);
2551 *p++ = cpu_to_be32(ace->flag);
2552 *p++ = cpu_to_be32(ace->access_mask &
2553 NFS4_ACE_MASK_ALL);
2554 status = nfsd4_encode_aclname(xdr, rqstp, ace);
2555 if (status)
2556 goto out;
2557 }
2558 }
2559 out_acl:
2560 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
2561 p = xdr_reserve_space(xdr, 4);
2562 if (!p)
2563 goto out_resource;
2564 *p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ?
2565 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2566 }
2567 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
2568 p = xdr_reserve_space(xdr, 4);
2569 if (!p)
2570 goto out_resource;
2571 *p++ = cpu_to_be32(1);
2572 }
2573 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
2574 p = xdr_reserve_space(xdr, 4);
2575 if (!p)
2576 goto out_resource;
2577 *p++ = cpu_to_be32(0);
2578 }
2579 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
2580 p = xdr_reserve_space(xdr, 4);
2581 if (!p)
2582 goto out_resource;
2583 *p++ = cpu_to_be32(1);
2584 }
2585 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2586 p = xdr_reserve_space(xdr, 4);
2587 if (!p)
2588 goto out_resource;
2589 *p++ = cpu_to_be32(1);
2590 }
2591 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2592 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
2593 if (!p)
2594 goto out_resource;
2595 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
2596 fhp->fh_handle.fh_size);
2597 }
2598 if (bmval0 & FATTR4_WORD0_FILEID) {
2599 p = xdr_reserve_space(xdr, 8);
2600 if (!p)
2601 goto out_resource;
2602 p = xdr_encode_hyper(p, stat.ino);
2603 }
2604 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2605 p = xdr_reserve_space(xdr, 8);
2606 if (!p)
2607 goto out_resource;
2608 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
2609 }
2610 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2611 p = xdr_reserve_space(xdr, 8);
2612 if (!p)
2613 goto out_resource;
2614 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
2615 }
2616 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2617 p = xdr_reserve_space(xdr, 8);
2618 if (!p)
2619 goto out_resource;
2620 p = xdr_encode_hyper(p, (u64) statfs.f_files);
2621 }
2622 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2623 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
2624 if (status)
2625 goto out;
2626 }
2627 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2628 p = xdr_reserve_space(xdr, 4);
2629 if (!p)
2630 goto out_resource;
2631 *p++ = cpu_to_be32(1);
2632 }
2633 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2634 p = xdr_reserve_space(xdr, 8);
2635 if (!p)
2636 goto out_resource;
2637 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
2638 }
2639 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2640 p = xdr_reserve_space(xdr, 4);
2641 if (!p)
2642 goto out_resource;
2643 *p++ = cpu_to_be32(255);
2644 }
2645 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2646 p = xdr_reserve_space(xdr, 4);
2647 if (!p)
2648 goto out_resource;
2649 *p++ = cpu_to_be32(statfs.f_namelen);
2650 }
2651 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2652 p = xdr_reserve_space(xdr, 8);
2653 if (!p)
2654 goto out_resource;
2655 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
2656 }
2657 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2658 p = xdr_reserve_space(xdr, 8);
2659 if (!p)
2660 goto out_resource;
2661 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
2662 }
2663 if (bmval1 & FATTR4_WORD1_MODE) {
2664 p = xdr_reserve_space(xdr, 4);
2665 if (!p)
2666 goto out_resource;
2667 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
2668 }
2669 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2670 p = xdr_reserve_space(xdr, 4);
2671 if (!p)
2672 goto out_resource;
2673 *p++ = cpu_to_be32(1);
2674 }
2675 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2676 p = xdr_reserve_space(xdr, 4);
2677 if (!p)
2678 goto out_resource;
2679 *p++ = cpu_to_be32(stat.nlink);
2680 }
2681 if (bmval1 & FATTR4_WORD1_OWNER) {
2682 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
2683 if (status)
2684 goto out;
2685 }
2686 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2687 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
2688 if (status)
2689 goto out;
2690 }
2691 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2692 p = xdr_reserve_space(xdr, 8);
2693 if (!p)
2694 goto out_resource;
2695 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
2696 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
2697 }
2698 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2699 p = xdr_reserve_space(xdr, 8);
2700 if (!p)
2701 goto out_resource;
2702 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2703 p = xdr_encode_hyper(p, dummy64);
2704 }
2705 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2706 p = xdr_reserve_space(xdr, 8);
2707 if (!p)
2708 goto out_resource;
2709 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2710 p = xdr_encode_hyper(p, dummy64);
2711 }
2712 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2713 p = xdr_reserve_space(xdr, 8);
2714 if (!p)
2715 goto out_resource;
2716 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2717 p = xdr_encode_hyper(p, dummy64);
2718 }
2719 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2720 p = xdr_reserve_space(xdr, 8);
2721 if (!p)
2722 goto out_resource;
2723 dummy64 = (u64)stat.blocks << 9;
2724 p = xdr_encode_hyper(p, dummy64);
2725 }
2726 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2727 p = xdr_reserve_space(xdr, 12);
2728 if (!p)
2729 goto out_resource;
2730 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
2731 *p++ = cpu_to_be32(stat.atime.tv_nsec);
2732 }
2733 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2734 p = xdr_reserve_space(xdr, 12);
2735 if (!p)
2736 goto out_resource;
2737 *p++ = cpu_to_be32(0);
2738 *p++ = cpu_to_be32(1);
2739 *p++ = cpu_to_be32(0);
2740 }
2741 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2742 p = xdr_reserve_space(xdr, 12);
2743 if (!p)
2744 goto out_resource;
2745 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
2746 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
2747 }
2748 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2749 p = xdr_reserve_space(xdr, 12);
2750 if (!p)
2751 goto out_resource;
2752 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
2753 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
2754 }
2755 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
2756 struct kstat parent_stat;
2757 u64 ino = stat.ino;
2758
2759 p = xdr_reserve_space(xdr, 8);
2760 if (!p)
2761 goto out_resource;
2762 /*
2763 * Get parent's attributes if not ignoring crossmount
2764 * and this is the root of a cross-mounted filesystem.
2765 */
2766 if (ignore_crossmnt == 0 &&
2767 dentry == exp->ex_path.mnt->mnt_root) {
2768 err = get_parent_attributes(exp, &parent_stat);
2769 if (err)
2770 goto out_nfserr;
2771 ino = parent_stat.ino;
2772 }
2773 p = xdr_encode_hyper(p, ino);
2774 }
2775 #ifdef CONFIG_NFSD_PNFS
2776 if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) {
2777 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
2778 if (status)
2779 goto out;
2780 }
2781
2782 if (bmval2 & FATTR4_WORD2_LAYOUT_TYPES) {
2783 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
2784 if (status)
2785 goto out;
2786 }
2787
2788 if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) {
2789 p = xdr_reserve_space(xdr, 4);
2790 if (!p)
2791 goto out_resource;
2792 *p++ = cpu_to_be32(stat.blksize);
2793 }
2794 #endif /* CONFIG_NFSD_PNFS */
2795 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2796 status = nfsd4_encode_bitmap(xdr, NFSD_SUPPATTR_EXCLCREAT_WORD0,
2797 NFSD_SUPPATTR_EXCLCREAT_WORD1,
2798 NFSD_SUPPATTR_EXCLCREAT_WORD2);
2799 if (status)
2800 goto out;
2801 }
2802
2803 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2804 status = nfsd4_encode_security_label(xdr, rqstp, context,
2805 contextlen);
2806 if (status)
2807 goto out;
2808 }
2809
2810 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
2811 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
2812 status = nfs_ok;
2813
2814 out:
2815 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2816 if (context)
2817 security_release_secctx(context, contextlen);
2818 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2819 kfree(acl);
2820 if (tempfh) {
2821 fh_put(tempfh);
2822 kfree(tempfh);
2823 }
2824 if (status)
2825 xdr_truncate_encode(xdr, starting_len);
2826 return status;
2827 out_nfserr:
2828 status = nfserrno(err);
2829 goto out;
2830 out_resource:
2831 status = nfserr_resource;
2832 goto out;
2833 }
2834
2835 static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
2836 struct xdr_buf *buf, __be32 *p, int bytes)
2837 {
2838 xdr->scratch.iov_len = 0;
2839 memset(buf, 0, sizeof(struct xdr_buf));
2840 buf->head[0].iov_base = p;
2841 buf->head[0].iov_len = 0;
2842 buf->len = 0;
2843 xdr->buf = buf;
2844 xdr->iov = buf->head;
2845 xdr->p = p;
2846 xdr->end = (void *)p + bytes;
2847 buf->buflen = bytes;
2848 }
2849
2850 __be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
2851 struct svc_fh *fhp, struct svc_export *exp,
2852 struct dentry *dentry, u32 *bmval,
2853 struct svc_rqst *rqstp, int ignore_crossmnt)
2854 {
2855 struct xdr_buf dummy;
2856 struct xdr_stream xdr;
2857 __be32 ret;
2858
2859 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
2860 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
2861 ignore_crossmnt);
2862 *p = xdr.p;
2863 return ret;
2864 }
2865
2866 static inline int attributes_need_mount(u32 *bmval)
2867 {
2868 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2869 return 1;
2870 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2871 return 1;
2872 return 0;
2873 }
2874
2875 static __be32
2876 nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
2877 const char *name, int namlen)
2878 {
2879 struct svc_export *exp = cd->rd_fhp->fh_export;
2880 struct dentry *dentry;
2881 __be32 nfserr;
2882 int ignore_crossmnt = 0;
2883
2884 dentry = lookup_one_len_unlocked(name, cd->rd_fhp->fh_dentry, namlen);
2885 if (IS_ERR(dentry))
2886 return nfserrno(PTR_ERR(dentry));
2887 if (d_really_is_negative(dentry)) {
2888 /*
2889 * we're not holding the i_mutex here, so there's
2890 * a window where this directory entry could have gone
2891 * away.
2892 */
2893 dput(dentry);
2894 return nfserr_noent;
2895 }
2896
2897 exp_get(exp);
2898 /*
2899 * In the case of a mountpoint, the client may be asking for
2900 * attributes that are only properties of the underlying filesystem
2901 * as opposed to the cross-mounted file system. In such a case,
2902 * we will not follow the cross mount and will fill the attribtutes
2903 * directly from the mountpoint dentry.
2904 */
2905 if (nfsd_mountpoint(dentry, exp)) {
2906 int err;
2907
2908 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2909 && !attributes_need_mount(cd->rd_bmval)) {
2910 ignore_crossmnt = 1;
2911 goto out_encode;
2912 }
2913 /*
2914 * Why the heck aren't we just using nfsd_lookup??
2915 * Different "."/".." handling? Something else?
2916 * At least, add a comment here to explain....
2917 */
2918 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2919 if (err) {
2920 nfserr = nfserrno(err);
2921 goto out_put;
2922 }
2923 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2924 if (nfserr)
2925 goto out_put;
2926
2927 }
2928 out_encode:
2929 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
2930 cd->rd_rqstp, ignore_crossmnt);
2931 out_put:
2932 dput(dentry);
2933 exp_put(exp);
2934 return nfserr;
2935 }
2936
2937 static __be32 *
2938 nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
2939 {
2940 __be32 *p;
2941
2942 p = xdr_reserve_space(xdr, 20);
2943 if (!p)
2944 return NULL;
2945 *p++ = htonl(2);
2946 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2947 *p++ = htonl(0); /* bmval1 */
2948
2949 *p++ = htonl(4); /* attribute length */
2950 *p++ = nfserr; /* no htonl */
2951 return p;
2952 }
2953
2954 static int
2955 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2956 loff_t offset, u64 ino, unsigned int d_type)
2957 {
2958 struct readdir_cd *ccd = ccdv;
2959 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2960 struct xdr_stream *xdr = cd->xdr;
2961 int start_offset = xdr->buf->len;
2962 int cookie_offset;
2963 u32 name_and_cookie;
2964 int entry_bytes;
2965 __be32 nfserr = nfserr_toosmall;
2966 __be64 wire_offset;
2967 __be32 *p;
2968
2969 /* In nfsv4, "." and ".." never make it onto the wire.. */
2970 if (name && isdotent(name, namlen)) {
2971 cd->common.err = nfs_ok;
2972 return 0;
2973 }
2974
2975 if (cd->cookie_offset) {
2976 wire_offset = cpu_to_be64(offset);
2977 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
2978 &wire_offset, 8);
2979 }
2980
2981 p = xdr_reserve_space(xdr, 4);
2982 if (!p)
2983 goto fail;
2984 *p++ = xdr_one; /* mark entry present */
2985 cookie_offset = xdr->buf->len;
2986 p = xdr_reserve_space(xdr, 3*4 + namlen);
2987 if (!p)
2988 goto fail;
2989 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2990 p = xdr_encode_array(p, name, namlen); /* name length & name */
2991
2992 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
2993 switch (nfserr) {
2994 case nfs_ok:
2995 break;
2996 case nfserr_resource:
2997 nfserr = nfserr_toosmall;
2998 goto fail;
2999 case nfserr_noent:
3000 xdr_truncate_encode(xdr, start_offset);
3001 goto skip_entry;
3002 default:
3003 /*
3004 * If the client requested the RDATTR_ERROR attribute,
3005 * we stuff the error code into this attribute
3006 * and continue. If this attribute was not requested,
3007 * then in accordance with the spec, we fail the
3008 * entire READDIR operation(!)
3009 */
3010 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
3011 goto fail;
3012 p = nfsd4_encode_rdattr_error(xdr, nfserr);
3013 if (p == NULL) {
3014 nfserr = nfserr_toosmall;
3015 goto fail;
3016 }
3017 }
3018 nfserr = nfserr_toosmall;
3019 entry_bytes = xdr->buf->len - start_offset;
3020 if (entry_bytes > cd->rd_maxcount)
3021 goto fail;
3022 cd->rd_maxcount -= entry_bytes;
3023 /*
3024 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", so
3025 * let's always let through the first entry, at least:
3026 */
3027 if (!cd->rd_dircount)
3028 goto fail;
3029 name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8;
3030 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset)
3031 goto fail;
3032 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie);
3033
3034 cd->cookie_offset = cookie_offset;
3035 skip_entry:
3036 cd->common.err = nfs_ok;
3037 return 0;
3038 fail:
3039 xdr_truncate_encode(xdr, start_offset);
3040 cd->common.err = nfserr;
3041 return -EINVAL;
3042 }
3043
3044 static __be32
3045 nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
3046 {
3047 __be32 *p;
3048
3049 p = xdr_reserve_space(xdr, sizeof(stateid_t));
3050 if (!p)
3051 return nfserr_resource;
3052 *p++ = cpu_to_be32(sid->si_generation);
3053 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
3054 sizeof(stateid_opaque_t));
3055 return 0;
3056 }
3057
3058 static __be32
3059 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
3060 {
3061 struct xdr_stream *xdr = &resp->xdr;
3062 __be32 *p;
3063
3064 if (!nfserr) {
3065 p = xdr_reserve_space(xdr, 8);
3066 if (!p)
3067 return nfserr_resource;
3068 *p++ = cpu_to_be32(access->ac_supported);
3069 *p++ = cpu_to_be32(access->ac_resp_access);
3070 }
3071 return nfserr;
3072 }
3073
3074 static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
3075 {
3076 struct xdr_stream *xdr = &resp->xdr;
3077 __be32 *p;
3078
3079 if (!nfserr) {
3080 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
3081 if (!p)
3082 return nfserr_resource;
3083 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
3084 NFS4_MAX_SESSIONID_LEN);
3085 *p++ = cpu_to_be32(bcts->dir);
3086 /* Upshifting from TCP to RDMA is not supported */
3087 *p++ = cpu_to_be32(0);
3088 }
3089 return nfserr;
3090 }
3091
3092 static __be32
3093 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
3094 {
3095 struct xdr_stream *xdr = &resp->xdr;
3096
3097 if (!nfserr)
3098 nfserr = nfsd4_encode_stateid(xdr, &close->cl_stateid);
3099
3100 return nfserr;
3101 }
3102
3103
3104 static __be32
3105 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
3106 {
3107 struct xdr_stream *xdr = &resp->xdr;
3108 __be32 *p;
3109
3110 if (!nfserr) {
3111 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3112 if (!p)
3113 return nfserr_resource;
3114 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
3115 NFS4_VERIFIER_SIZE);
3116 }
3117 return nfserr;
3118 }
3119
3120 static __be32
3121 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
3122 {
3123 struct xdr_stream *xdr = &resp->xdr;
3124 __be32 *p;
3125
3126 if (!nfserr) {
3127 p = xdr_reserve_space(xdr, 20);
3128 if (!p)
3129 return nfserr_resource;
3130 encode_cinfo(p, &create->cr_cinfo);
3131 nfserr = nfsd4_encode_bitmap(xdr, create->cr_bmval[0],
3132 create->cr_bmval[1], create->cr_bmval[2]);
3133 }
3134 return nfserr;
3135 }
3136
3137 static __be32
3138 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
3139 {
3140 struct svc_fh *fhp = getattr->ga_fhp;
3141 struct xdr_stream *xdr = &resp->xdr;
3142
3143 if (nfserr)
3144 return nfserr;
3145
3146 nfserr = nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
3147 getattr->ga_bmval,
3148 resp->rqstp, 0);
3149 return nfserr;
3150 }
3151
3152 static __be32
3153 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
3154 {
3155 struct xdr_stream *xdr = &resp->xdr;
3156 struct svc_fh *fhp = *fhpp;
3157 unsigned int len;
3158 __be32 *p;
3159
3160 if (!nfserr) {
3161 len = fhp->fh_handle.fh_size;
3162 p = xdr_reserve_space(xdr, len + 4);
3163 if (!p)
3164 return nfserr_resource;
3165 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
3166 }
3167 return nfserr;
3168 }
3169
3170 /*
3171 * Including all fields other than the name, a LOCK4denied structure requires
3172 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
3173 */
3174 static __be32
3175 nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
3176 {
3177 struct xdr_netobj *conf = &ld->ld_owner;
3178 __be32 *p;
3179
3180 again:
3181 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
3182 if (!p) {
3183 /*
3184 * Don't fail to return the result just because we can't
3185 * return the conflicting open:
3186 */
3187 if (conf->len) {
3188 kfree(conf->data);
3189 conf->len = 0;
3190 conf->data = NULL;
3191 goto again;
3192 }
3193 return nfserr_resource;
3194 }
3195 p = xdr_encode_hyper(p, ld->ld_start);
3196 p = xdr_encode_hyper(p, ld->ld_length);
3197 *p++ = cpu_to_be32(ld->ld_type);
3198 if (conf->len) {
3199 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
3200 p = xdr_encode_opaque(p, conf->data, conf->len);
3201 kfree(conf->data);
3202 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
3203 p = xdr_encode_hyper(p, (u64)0); /* clientid */
3204 *p++ = cpu_to_be32(0); /* length of owner name */
3205 }
3206 return nfserr_denied;
3207 }
3208
3209 static __be32
3210 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
3211 {
3212 struct xdr_stream *xdr = &resp->xdr;
3213
3214 if (!nfserr)
3215 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
3216 else if (nfserr == nfserr_denied)
3217 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
3218
3219 return nfserr;
3220 }
3221
3222 static __be32
3223 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
3224 {
3225 struct xdr_stream *xdr = &resp->xdr;
3226
3227 if (nfserr == nfserr_denied)
3228 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
3229 return nfserr;
3230 }
3231
3232 static __be32
3233 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
3234 {
3235 struct xdr_stream *xdr = &resp->xdr;
3236
3237 if (!nfserr)
3238 nfserr = nfsd4_encode_stateid(xdr, &locku->lu_stateid);
3239
3240 return nfserr;
3241 }
3242
3243
3244 static __be32
3245 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
3246 {
3247 struct xdr_stream *xdr = &resp->xdr;
3248 __be32 *p;
3249
3250 if (!nfserr) {
3251 p = xdr_reserve_space(xdr, 20);
3252 if (!p)
3253 return nfserr_resource;
3254 p = encode_cinfo(p, &link->li_cinfo);
3255 }
3256 return nfserr;
3257 }
3258
3259
3260 static __be32
3261 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
3262 {
3263 struct xdr_stream *xdr = &resp->xdr;
3264 __be32 *p;
3265
3266 if (nfserr)
3267 goto out;
3268
3269 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
3270 if (nfserr)
3271 goto out;
3272 p = xdr_reserve_space(xdr, 24);
3273 if (!p)
3274 return nfserr_resource;
3275 p = encode_cinfo(p, &open->op_cinfo);
3276 *p++ = cpu_to_be32(open->op_rflags);
3277
3278 nfserr = nfsd4_encode_bitmap(xdr, open->op_bmval[0], open->op_bmval[1],
3279 open->op_bmval[2]);
3280 if (nfserr)
3281 goto out;
3282
3283 p = xdr_reserve_space(xdr, 4);
3284 if (!p)
3285 return nfserr_resource;
3286
3287 *p++ = cpu_to_be32(open->op_delegate_type);
3288 switch (open->op_delegate_type) {
3289 case NFS4_OPEN_DELEGATE_NONE:
3290 break;
3291 case NFS4_OPEN_DELEGATE_READ:
3292 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3293 if (nfserr)
3294 return nfserr;
3295 p = xdr_reserve_space(xdr, 20);
3296 if (!p)
3297 return nfserr_resource;
3298 *p++ = cpu_to_be32(open->op_recall);
3299
3300 /*
3301 * TODO: ACE's in delegations
3302 */
3303 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3304 *p++ = cpu_to_be32(0);
3305 *p++ = cpu_to_be32(0);
3306 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
3307 break;
3308 case NFS4_OPEN_DELEGATE_WRITE:
3309 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3310 if (nfserr)
3311 return nfserr;
3312 p = xdr_reserve_space(xdr, 32);
3313 if (!p)
3314 return nfserr_resource;
3315 *p++ = cpu_to_be32(0);
3316
3317 /*
3318 * TODO: space_limit's in delegations
3319 */
3320 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
3321 *p++ = cpu_to_be32(~(u32)0);
3322 *p++ = cpu_to_be32(~(u32)0);
3323
3324 /*
3325 * TODO: ACE's in delegations
3326 */
3327 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3328 *p++ = cpu_to_be32(0);
3329 *p++ = cpu_to_be32(0);
3330 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
3331 break;
3332 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3333 switch (open->op_why_no_deleg) {
3334 case WND4_CONTENTION:
3335 case WND4_RESOURCE:
3336 p = xdr_reserve_space(xdr, 8);
3337 if (!p)
3338 return nfserr_resource;
3339 *p++ = cpu_to_be32(open->op_why_no_deleg);
3340 /* deleg signaling not supported yet: */
3341 *p++ = cpu_to_be32(0);
3342 break;
3343 default:
3344 p = xdr_reserve_space(xdr, 4);
3345 if (!p)
3346 return nfserr_resource;
3347 *p++ = cpu_to_be32(open->op_why_no_deleg);
3348 }
3349 break;
3350 default:
3351 BUG();
3352 }
3353 /* XXX save filehandle here */
3354 out:
3355 return nfserr;
3356 }
3357
3358 static __be32
3359 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
3360 {
3361 struct xdr_stream *xdr = &resp->xdr;
3362
3363 if (!nfserr)
3364 nfserr = nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
3365
3366 return nfserr;
3367 }
3368
3369 static __be32
3370 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
3371 {
3372 struct xdr_stream *xdr = &resp->xdr;
3373
3374 if (!nfserr)
3375 nfserr = nfsd4_encode_stateid(xdr, &od->od_stateid);
3376
3377 return nfserr;
3378 }
3379
3380 static __be32 nfsd4_encode_splice_read(
3381 struct nfsd4_compoundres *resp,
3382 struct nfsd4_read *read,
3383 struct file *file, unsigned long maxcount)
3384 {
3385 struct xdr_stream *xdr = &resp->xdr;
3386 struct xdr_buf *buf = xdr->buf;
3387 u32 eof;
3388 long len;
3389 int space_left;
3390 __be32 nfserr;
3391 __be32 *p = xdr->p - 2;
3392
3393 /* Make sure there will be room for padding if needed */
3394 if (xdr->end - xdr->p < 1)
3395 return nfserr_resource;
3396
3397 len = maxcount;
3398 nfserr = nfsd_splice_read(read->rd_rqstp, file,
3399 read->rd_offset, &maxcount);
3400 if (nfserr) {
3401 /*
3402 * nfsd_splice_actor may have already messed with the
3403 * page length; reset it so as not to confuse
3404 * xdr_truncate_encode:
3405 */
3406 buf->page_len = 0;
3407 return nfserr;
3408 }
3409
3410 eof = nfsd_eof_on_read(len, maxcount, read->rd_offset,
3411 d_inode(read->rd_fhp->fh_dentry)->i_size);
3412
3413 *(p++) = htonl(eof);
3414 *(p++) = htonl(maxcount);
3415
3416 buf->page_len = maxcount;
3417 buf->len += maxcount;
3418 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1)
3419 / PAGE_SIZE;
3420
3421 /* Use rest of head for padding and remaining ops: */
3422 buf->tail[0].iov_base = xdr->p;
3423 buf->tail[0].iov_len = 0;
3424 xdr->iov = buf->tail;
3425 if (maxcount&3) {
3426 int pad = 4 - (maxcount&3);
3427
3428 *(xdr->p++) = 0;
3429
3430 buf->tail[0].iov_base += maxcount&3;
3431 buf->tail[0].iov_len = pad;
3432 buf->len += pad;
3433 }
3434
3435 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
3436 buf->buflen - buf->len);
3437 buf->buflen = buf->len + space_left;
3438 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3439
3440 return 0;
3441 }
3442
3443 static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3444 struct nfsd4_read *read,
3445 struct file *file, unsigned long maxcount)
3446 {
3447 struct xdr_stream *xdr = &resp->xdr;
3448 u32 eof;
3449 int v;
3450 int starting_len = xdr->buf->len - 8;
3451 long len;
3452 int thislen;
3453 __be32 nfserr;
3454 __be32 tmp;
3455 __be32 *p;
3456 u32 zzz = 0;
3457 int pad;
3458
3459 len = maxcount;
3460 v = 0;
3461
3462 thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p));
3463 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3464 WARN_ON_ONCE(!p);
3465 resp->rqstp->rq_vec[v].iov_base = p;
3466 resp->rqstp->rq_vec[v].iov_len = thislen;
3467 v++;
3468 len -= thislen;
3469
3470 while (len) {
3471 thislen = min_t(long, len, PAGE_SIZE);
3472 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3473 WARN_ON_ONCE(!p);
3474 resp->rqstp->rq_vec[v].iov_base = p;
3475 resp->rqstp->rq_vec[v].iov_len = thislen;
3476 v++;
3477 len -= thislen;
3478 }
3479 read->rd_vlen = v;
3480
3481 len = maxcount;
3482 nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec,
3483 read->rd_vlen, &maxcount);
3484 if (nfserr)
3485 return nfserr;
3486 xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3));
3487
3488 eof = nfsd_eof_on_read(len, maxcount, read->rd_offset,
3489 d_inode(read->rd_fhp->fh_dentry)->i_size);
3490
3491 tmp = htonl(eof);
3492 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
3493 tmp = htonl(maxcount);
3494 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3495
3496 pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
3497 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
3498 &zzz, pad);
3499 return 0;
3500
3501 }
3502
3503 static __be32
3504 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3505 struct nfsd4_read *read)
3506 {
3507 unsigned long maxcount;
3508 struct xdr_stream *xdr = &resp->xdr;
3509 struct file *file = read->rd_filp;
3510 int starting_len = xdr->buf->len;
3511 struct raparms *ra = NULL;
3512 __be32 *p;
3513
3514 if (nfserr)
3515 goto out;
3516
3517 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
3518 if (!p) {
3519 WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags));
3520 nfserr = nfserr_resource;
3521 goto out;
3522 }
3523 if (resp->xdr.buf->page_len &&
3524 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) {
3525 WARN_ON_ONCE(1);
3526 nfserr = nfserr_resource;
3527 goto out;
3528 }
3529 xdr_commit_encode(xdr);
3530
3531 maxcount = svc_max_payload(resp->rqstp);
3532 maxcount = min_t(unsigned long, maxcount,
3533 (xdr->buf->buflen - xdr->buf->len));
3534 maxcount = min_t(unsigned long, maxcount, read->rd_length);
3535
3536 if (read->rd_tmp_file)
3537 ra = nfsd_init_raparms(file);
3538
3539 if (file->f_op->splice_read &&
3540 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags))
3541 nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount);
3542 else
3543 nfserr = nfsd4_encode_readv(resp, read, file, maxcount);
3544
3545 if (ra)
3546 nfsd_put_raparams(file, ra);
3547
3548 if (nfserr)
3549 xdr_truncate_encode(xdr, starting_len);
3550
3551 out:
3552 if (file)
3553 fput(file);
3554 return nfserr;
3555 }
3556
3557 static __be32
3558 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
3559 {
3560 int maxcount;
3561 __be32 wire_count;
3562 int zero = 0;
3563 struct xdr_stream *xdr = &resp->xdr;
3564 int length_offset = xdr->buf->len;
3565 __be32 *p;
3566
3567 if (nfserr)
3568 return nfserr;
3569
3570 p = xdr_reserve_space(xdr, 4);
3571 if (!p)
3572 return nfserr_resource;
3573 maxcount = PAGE_SIZE;
3574
3575 p = xdr_reserve_space(xdr, maxcount);
3576 if (!p)
3577 return nfserr_resource;
3578 /*
3579 * XXX: By default, the ->readlink() VFS op will truncate symlinks
3580 * if they would overflow the buffer. Is this kosher in NFSv4? If
3581 * not, one easy fix is: if ->readlink() precisely fills the buffer,
3582 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
3583 */
3584 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
3585 (char *)p, &maxcount);
3586 if (nfserr == nfserr_isdir)
3587 nfserr = nfserr_inval;
3588 if (nfserr) {
3589 xdr_truncate_encode(xdr, length_offset);
3590 return nfserr;
3591 }
3592
3593 wire_count = htonl(maxcount);
3594 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
3595 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4));
3596 if (maxcount & 3)
3597 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
3598 &zero, 4 - (maxcount&3));
3599 return 0;
3600 }
3601
3602 static __be32
3603 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
3604 {
3605 int maxcount;
3606 int bytes_left;
3607 loff_t offset;
3608 __be64 wire_offset;
3609 struct xdr_stream *xdr = &resp->xdr;
3610 int starting_len = xdr->buf->len;
3611 __be32 *p;
3612
3613 if (nfserr)
3614 return nfserr;
3615
3616 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3617 if (!p)
3618 return nfserr_resource;
3619
3620 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
3621 *p++ = cpu_to_be32(0);
3622 *p++ = cpu_to_be32(0);
3623 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
3624 - (char *)resp->xdr.buf->head[0].iov_base;
3625
3626 /*
3627 * Number of bytes left for directory entries allowing for the
3628 * final 8 bytes of the readdir and a following failed op:
3629 */
3630 bytes_left = xdr->buf->buflen - xdr->buf->len
3631 - COMPOUND_ERR_SLACK_SPACE - 8;
3632 if (bytes_left < 0) {
3633 nfserr = nfserr_resource;
3634 goto err_no_verf;
3635 }
3636 maxcount = min_t(u32, readdir->rd_maxcount, INT_MAX);
3637 /*
3638 * Note the rfc defines rd_maxcount as the size of the
3639 * READDIR4resok structure, which includes the verifier above
3640 * and the 8 bytes encoded at the end of this function:
3641 */
3642 if (maxcount < 16) {
3643 nfserr = nfserr_toosmall;
3644 goto err_no_verf;
3645 }
3646 maxcount = min_t(int, maxcount-16, bytes_left);
3647
3648 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */
3649 if (!readdir->rd_dircount)
3650 readdir->rd_dircount = INT_MAX;
3651
3652 readdir->xdr = xdr;
3653 readdir->rd_maxcount = maxcount;
3654 readdir->common.err = 0;
3655 readdir->cookie_offset = 0;
3656
3657 offset = readdir->rd_cookie;
3658 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3659 &offset,
3660 &readdir->common, nfsd4_encode_dirent);
3661 if (nfserr == nfs_ok &&
3662 readdir->common.err == nfserr_toosmall &&
3663 xdr->buf->len == starting_len + 8) {
3664 /* nothing encoded; which limit did we hit?: */
3665 if (maxcount - 16 < bytes_left)
3666 /* It was the fault of rd_maxcount: */
3667 nfserr = nfserr_toosmall;
3668 else
3669 /* We ran out of buffer space: */
3670 nfserr = nfserr_resource;
3671 }
3672 if (nfserr)
3673 goto err_no_verf;
3674
3675 if (readdir->cookie_offset) {
3676 wire_offset = cpu_to_be64(offset);
3677 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
3678 &wire_offset, 8);
3679 }
3680
3681 p = xdr_reserve_space(xdr, 8);
3682 if (!p) {
3683 WARN_ON_ONCE(1);
3684 goto err_no_verf;
3685 }
3686 *p++ = 0; /* no more entries */
3687 *p++ = htonl(readdir->common.err == nfserr_eof);
3688
3689 return 0;
3690 err_no_verf:
3691 xdr_truncate_encode(xdr, starting_len);
3692 return nfserr;
3693 }
3694
3695 static __be32
3696 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
3697 {
3698 struct xdr_stream *xdr = &resp->xdr;
3699 __be32 *p;
3700
3701 if (!nfserr) {
3702 p = xdr_reserve_space(xdr, 20);
3703 if (!p)
3704 return nfserr_resource;
3705 p = encode_cinfo(p, &remove->rm_cinfo);
3706 }
3707 return nfserr;
3708 }
3709
3710 static __be32
3711 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
3712 {
3713 struct xdr_stream *xdr = &resp->xdr;
3714 __be32 *p;
3715
3716 if (!nfserr) {
3717 p = xdr_reserve_space(xdr, 40);
3718 if (!p)
3719 return nfserr_resource;
3720 p = encode_cinfo(p, &rename->rn_sinfo);
3721 p = encode_cinfo(p, &rename->rn_tinfo);
3722 }
3723 return nfserr;
3724 }
3725
3726 static __be32
3727 nfsd4_do_encode_secinfo(struct xdr_stream *xdr,
3728 __be32 nfserr, struct svc_export *exp)
3729 {
3730 u32 i, nflavs, supported;
3731 struct exp_flavor_info *flavs;
3732 struct exp_flavor_info def_flavs[2];
3733 __be32 *p, *flavorsp;
3734 static bool report = true;
3735
3736 if (nfserr)
3737 goto out;
3738 nfserr = nfserr_resource;
3739 if (exp->ex_nflavors) {
3740 flavs = exp->ex_flavors;
3741 nflavs = exp->ex_nflavors;
3742 } else { /* Handling of some defaults in absence of real secinfo: */
3743 flavs = def_flavs;
3744 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3745 nflavs = 2;
3746 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3747 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3748 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3749 nflavs = 1;
3750 flavs[0].pseudoflavor
3751 = svcauth_gss_flavor(exp->ex_client);
3752 } else {
3753 nflavs = 1;
3754 flavs[0].pseudoflavor
3755 = exp->ex_client->flavour->flavour;
3756 }
3757 }
3758
3759 supported = 0;
3760 p = xdr_reserve_space(xdr, 4);
3761 if (!p)
3762 goto out;
3763 flavorsp = p++; /* to be backfilled later */
3764
3765 for (i = 0; i < nflavs; i++) {
3766 rpc_authflavor_t pf = flavs[i].pseudoflavor;
3767 struct rpcsec_gss_info info;
3768
3769 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3770 supported++;
3771 p = xdr_reserve_space(xdr, 4 + 4 +
3772 XDR_LEN(info.oid.len) + 4 + 4);
3773 if (!p)
3774 goto out;
3775 *p++ = cpu_to_be32(RPC_AUTH_GSS);
3776 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
3777 *p++ = cpu_to_be32(info.qop);
3778 *p++ = cpu_to_be32(info.service);
3779 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3780 supported++;
3781 p = xdr_reserve_space(xdr, 4);
3782 if (!p)
3783 goto out;
3784 *p++ = cpu_to_be32(pf);
3785 } else {
3786 if (report)
3787 pr_warn("NFS: SECINFO: security flavor %u "
3788 "is not supported\n", pf);
3789 }
3790 }
3791
3792 if (nflavs != supported)
3793 report = false;
3794 *flavorsp = htonl(supported);
3795 nfserr = 0;
3796 out:
3797 if (exp)
3798 exp_put(exp);
3799 return nfserr;
3800 }
3801
3802 static __be32
3803 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3804 struct nfsd4_secinfo *secinfo)
3805 {
3806 struct xdr_stream *xdr = &resp->xdr;
3807
3808 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->si_exp);
3809 }
3810
3811 static __be32
3812 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3813 struct nfsd4_secinfo_no_name *secinfo)
3814 {
3815 struct xdr_stream *xdr = &resp->xdr;
3816
3817 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->sin_exp);
3818 }
3819
3820 /*
3821 * The SETATTR encode routine is special -- it always encodes a bitmap,
3822 * regardless of the error status.
3823 */
3824 static __be32
3825 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
3826 {
3827 struct xdr_stream *xdr = &resp->xdr;
3828 __be32 *p;
3829
3830 p = xdr_reserve_space(xdr, 16);
3831 if (!p)
3832 return nfserr_resource;
3833 if (nfserr) {
3834 *p++ = cpu_to_be32(3);
3835 *p++ = cpu_to_be32(0);
3836 *p++ = cpu_to_be32(0);
3837 *p++ = cpu_to_be32(0);
3838 }
3839 else {
3840 *p++ = cpu_to_be32(3);
3841 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
3842 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
3843 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
3844 }
3845 return nfserr;
3846 }
3847
3848 static __be32
3849 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
3850 {
3851 struct xdr_stream *xdr = &resp->xdr;
3852 __be32 *p;
3853
3854 if (!nfserr) {
3855 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
3856 if (!p)
3857 return nfserr_resource;
3858 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
3859 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
3860 NFS4_VERIFIER_SIZE);
3861 }
3862 else if (nfserr == nfserr_clid_inuse) {
3863 p = xdr_reserve_space(xdr, 8);
3864 if (!p)
3865 return nfserr_resource;
3866 *p++ = cpu_to_be32(0);
3867 *p++ = cpu_to_be32(0);
3868 }
3869 return nfserr;
3870 }
3871
3872 static __be32
3873 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
3874 {
3875 struct xdr_stream *xdr = &resp->xdr;
3876 __be32 *p;
3877
3878 if (!nfserr) {
3879 p = xdr_reserve_space(xdr, 16);
3880 if (!p)
3881 return nfserr_resource;
3882 *p++ = cpu_to_be32(write->wr_bytes_written);
3883 *p++ = cpu_to_be32(write->wr_how_written);
3884 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
3885 NFS4_VERIFIER_SIZE);
3886 }
3887 return nfserr;
3888 }
3889
3890 static __be32
3891 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
3892 struct nfsd4_exchange_id *exid)
3893 {
3894 struct xdr_stream *xdr = &resp->xdr;
3895 __be32 *p;
3896 char *major_id;
3897 char *server_scope;
3898 int major_id_sz;
3899 int server_scope_sz;
3900 int status = 0;
3901 uint64_t minor_id = 0;
3902
3903 if (nfserr)
3904 return nfserr;
3905
3906 major_id = utsname()->nodename;
3907 major_id_sz = strlen(major_id);
3908 server_scope = utsname()->nodename;
3909 server_scope_sz = strlen(server_scope);
3910
3911 p = xdr_reserve_space(xdr,
3912 8 /* eir_clientid */ +
3913 4 /* eir_sequenceid */ +
3914 4 /* eir_flags */ +
3915 4 /* spr_how */);
3916 if (!p)
3917 return nfserr_resource;
3918
3919 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
3920 *p++ = cpu_to_be32(exid->seqid);
3921 *p++ = cpu_to_be32(exid->flags);
3922
3923 *p++ = cpu_to_be32(exid->spa_how);
3924
3925 switch (exid->spa_how) {
3926 case SP4_NONE:
3927 break;
3928 case SP4_MACH_CRED:
3929 /* spo_must_enforce bitmap: */
3930 status = nfsd4_encode_bitmap(xdr,
3931 exid->spo_must_enforce[0],
3932 exid->spo_must_enforce[1],
3933 exid->spo_must_enforce[2]);
3934 if (status)
3935 goto out;
3936 /* spo_must_allow bitmap: */
3937 status = nfsd4_encode_bitmap(xdr,
3938 exid->spo_must_allow[0],
3939 exid->spo_must_allow[1],
3940 exid->spo_must_allow[2]);
3941 if (status)
3942 goto out;
3943 break;
3944 default:
3945 WARN_ON_ONCE(1);
3946 }
3947
3948 p = xdr_reserve_space(xdr,
3949 8 /* so_minor_id */ +
3950 4 /* so_major_id.len */ +
3951 (XDR_QUADLEN(major_id_sz) * 4) +
3952 4 /* eir_server_scope.len */ +
3953 (XDR_QUADLEN(server_scope_sz) * 4) +
3954 4 /* eir_server_impl_id.count (0) */);
3955 if (!p)
3956 return nfserr_resource;
3957
3958 /* The server_owner struct */
3959 p = xdr_encode_hyper(p, minor_id); /* Minor id */
3960 /* major id */
3961 p = xdr_encode_opaque(p, major_id, major_id_sz);
3962
3963 /* Server scope */
3964 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
3965
3966 /* Implementation id */
3967 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */
3968 return 0;
3969 out:
3970 return status;
3971 }
3972
3973 static __be32
3974 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
3975 struct nfsd4_create_session *sess)
3976 {
3977 struct xdr_stream *xdr = &resp->xdr;
3978 __be32 *p;
3979
3980 if (nfserr)
3981 return nfserr;
3982
3983 p = xdr_reserve_space(xdr, 24);
3984 if (!p)
3985 return nfserr_resource;
3986 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
3987 NFS4_MAX_SESSIONID_LEN);
3988 *p++ = cpu_to_be32(sess->seqid);
3989 *p++ = cpu_to_be32(sess->flags);
3990
3991 p = xdr_reserve_space(xdr, 28);
3992 if (!p)
3993 return nfserr_resource;
3994 *p++ = cpu_to_be32(0); /* headerpadsz */
3995 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
3996 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
3997 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
3998 *p++ = cpu_to_be32(sess->fore_channel.maxops);
3999 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
4000 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
4001
4002 if (sess->fore_channel.nr_rdma_attrs) {
4003 p = xdr_reserve_space(xdr, 4);
4004 if (!p)
4005 return nfserr_resource;
4006 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
4007 }
4008
4009 p = xdr_reserve_space(xdr, 28);
4010 if (!p)
4011 return nfserr_resource;
4012 *p++ = cpu_to_be32(0); /* headerpadsz */
4013 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
4014 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
4015 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
4016 *p++ = cpu_to_be32(sess->back_channel.maxops);
4017 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
4018 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
4019
4020 if (sess->back_channel.nr_rdma_attrs) {
4021 p = xdr_reserve_space(xdr, 4);
4022 if (!p)
4023 return nfserr_resource;
4024 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
4025 }
4026 return 0;
4027 }
4028
4029 static __be32
4030 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
4031 struct nfsd4_sequence *seq)
4032 {
4033 struct xdr_stream *xdr = &resp->xdr;
4034 __be32 *p;
4035
4036 if (nfserr)
4037 return nfserr;
4038
4039 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
4040 if (!p)
4041 return nfserr_resource;
4042 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
4043 NFS4_MAX_SESSIONID_LEN);
4044 *p++ = cpu_to_be32(seq->seqid);
4045 *p++ = cpu_to_be32(seq->slotid);
4046 /* Note slotid's are numbered from zero: */
4047 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
4048 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
4049 *p++ = cpu_to_be32(seq->status_flags);
4050
4051 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
4052 return 0;
4053 }
4054
4055 static __be32
4056 nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
4057 struct nfsd4_test_stateid *test_stateid)
4058 {
4059 struct xdr_stream *xdr = &resp->xdr;
4060 struct nfsd4_test_stateid_id *stateid, *next;
4061 __be32 *p;
4062
4063 if (nfserr)
4064 return nfserr;
4065
4066 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
4067 if (!p)
4068 return nfserr_resource;
4069 *p++ = htonl(test_stateid->ts_num_ids);
4070
4071 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
4072 *p++ = stateid->ts_id_status;
4073 }
4074
4075 return nfserr;
4076 }
4077
4078 #ifdef CONFIG_NFSD_PNFS
4079 static __be32
4080 nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
4081 struct nfsd4_getdeviceinfo *gdev)
4082 {
4083 struct xdr_stream *xdr = &resp->xdr;
4084 const struct nfsd4_layout_ops *ops =
4085 nfsd4_layout_ops[gdev->gd_layout_type];
4086 u32 starting_len = xdr->buf->len, needed_len;
4087 __be32 *p;
4088
4089 dprintk("%s: err %d\n", __func__, be32_to_cpu(nfserr));
4090 if (nfserr)
4091 goto out;
4092
4093 nfserr = nfserr_resource;
4094 p = xdr_reserve_space(xdr, 4);
4095 if (!p)
4096 goto out;
4097
4098 *p++ = cpu_to_be32(gdev->gd_layout_type);
4099
4100 /* If maxcount is 0 then just update notifications */
4101 if (gdev->gd_maxcount != 0) {
4102 nfserr = ops->encode_getdeviceinfo(xdr, gdev);
4103 if (nfserr) {
4104 /*
4105 * We don't bother to burden the layout drivers with
4106 * enforcing gd_maxcount, just tell the client to
4107 * come back with a bigger buffer if it's not enough.
4108 */
4109 if (xdr->buf->len + 4 > gdev->gd_maxcount)
4110 goto toosmall;
4111 goto out;
4112 }
4113 }
4114
4115 nfserr = nfserr_resource;
4116 if (gdev->gd_notify_types) {
4117 p = xdr_reserve_space(xdr, 4 + 4);
4118 if (!p)
4119 goto out;
4120 *p++ = cpu_to_be32(1); /* bitmap length */
4121 *p++ = cpu_to_be32(gdev->gd_notify_types);
4122 } else {
4123 p = xdr_reserve_space(xdr, 4);
4124 if (!p)
4125 goto out;
4126 *p++ = 0;
4127 }
4128
4129 nfserr = 0;
4130 out:
4131 kfree(gdev->gd_device);
4132 dprintk("%s: done: %d\n", __func__, be32_to_cpu(nfserr));
4133 return nfserr;
4134
4135 toosmall:
4136 dprintk("%s: maxcount too small\n", __func__);
4137 needed_len = xdr->buf->len + 4 /* notifications */;
4138 xdr_truncate_encode(xdr, starting_len);
4139 p = xdr_reserve_space(xdr, 4);
4140 if (!p) {
4141 nfserr = nfserr_resource;
4142 } else {
4143 *p++ = cpu_to_be32(needed_len);
4144 nfserr = nfserr_toosmall;
4145 }
4146 goto out;
4147 }
4148
4149 static __be32
4150 nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr,
4151 struct nfsd4_layoutget *lgp)
4152 {
4153 struct xdr_stream *xdr = &resp->xdr;
4154 const struct nfsd4_layout_ops *ops =
4155 nfsd4_layout_ops[lgp->lg_layout_type];
4156 __be32 *p;
4157
4158 dprintk("%s: err %d\n", __func__, nfserr);
4159 if (nfserr)
4160 goto out;
4161
4162 nfserr = nfserr_resource;
4163 p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t));
4164 if (!p)
4165 goto out;
4166
4167 *p++ = cpu_to_be32(1); /* we always set return-on-close */
4168 *p++ = cpu_to_be32(lgp->lg_sid.si_generation);
4169 p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque,
4170 sizeof(stateid_opaque_t));
4171
4172 *p++ = cpu_to_be32(1); /* we always return a single layout */
4173 p = xdr_encode_hyper(p, lgp->lg_seg.offset);
4174 p = xdr_encode_hyper(p, lgp->lg_seg.length);
4175 *p++ = cpu_to_be32(lgp->lg_seg.iomode);
4176 *p++ = cpu_to_be32(lgp->lg_layout_type);
4177
4178 nfserr = ops->encode_layoutget(xdr, lgp);
4179 out:
4180 kfree(lgp->lg_content);
4181 return nfserr;
4182 }
4183
4184 static __be32
4185 nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr,
4186 struct nfsd4_layoutcommit *lcp)
4187 {
4188 struct xdr_stream *xdr = &resp->xdr;
4189 __be32 *p;
4190
4191 if (nfserr)
4192 return nfserr;
4193
4194 p = xdr_reserve_space(xdr, 4);
4195 if (!p)
4196 return nfserr_resource;
4197 *p++ = cpu_to_be32(lcp->lc_size_chg);
4198 if (lcp->lc_size_chg) {
4199 p = xdr_reserve_space(xdr, 8);
4200 if (!p)
4201 return nfserr_resource;
4202 p = xdr_encode_hyper(p, lcp->lc_newsize);
4203 }
4204
4205 return nfs_ok;
4206 }
4207
4208 static __be32
4209 nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr,
4210 struct nfsd4_layoutreturn *lrp)
4211 {
4212 struct xdr_stream *xdr = &resp->xdr;
4213 __be32 *p;
4214
4215 if (nfserr)
4216 return nfserr;
4217
4218 p = xdr_reserve_space(xdr, 4);
4219 if (!p)
4220 return nfserr_resource;
4221 *p++ = cpu_to_be32(lrp->lrs_present);
4222 if (lrp->lrs_present)
4223 return nfsd4_encode_stateid(xdr, &lrp->lr_sid);
4224 return nfs_ok;
4225 }
4226 #endif /* CONFIG_NFSD_PNFS */
4227
4228 static __be32
4229 nfsd42_encode_write_res(struct nfsd4_compoundres *resp, struct nfsd42_write_res *write)
4230 {
4231 __be32 *p;
4232
4233 p = xdr_reserve_space(&resp->xdr, 4 + 8 + 4 + NFS4_VERIFIER_SIZE);
4234 if (!p)
4235 return nfserr_resource;
4236
4237 *p++ = cpu_to_be32(0);
4238 p = xdr_encode_hyper(p, write->wr_bytes_written);
4239 *p++ = cpu_to_be32(write->wr_stable_how);
4240 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
4241 NFS4_VERIFIER_SIZE);
4242 return nfs_ok;
4243 }
4244
4245 static __be32
4246 nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr,
4247 struct nfsd4_copy *copy)
4248 {
4249 __be32 *p;
4250
4251 if (!nfserr) {
4252 nfserr = nfsd42_encode_write_res(resp, &copy->cp_res);
4253 if (nfserr)
4254 return nfserr;
4255
4256 p = xdr_reserve_space(&resp->xdr, 4 + 4);
4257 *p++ = cpu_to_be32(copy->cp_consecutive);
4258 *p++ = cpu_to_be32(copy->cp_synchronous);
4259 }
4260 return nfserr;
4261 }
4262
4263 static __be32
4264 nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
4265 struct nfsd4_seek *seek)
4266 {
4267 __be32 *p;
4268
4269 if (nfserr)
4270 return nfserr;
4271
4272 p = xdr_reserve_space(&resp->xdr, 4 + 8);
4273 *p++ = cpu_to_be32(seek->seek_eof);
4274 p = xdr_encode_hyper(p, seek->seek_pos);
4275
4276 return nfserr;
4277 }
4278
4279 static __be32
4280 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
4281 {
4282 return nfserr;
4283 }
4284
4285 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
4286
4287 /*
4288 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
4289 * since we don't need to filter out obsolete ops as this is
4290 * done in the decoding phase.
4291 */
4292 static nfsd4_enc nfsd4_enc_ops[] = {
4293 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
4294 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
4295 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
4296 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
4297 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
4298 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
4299 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
4300 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
4301 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
4302 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
4303 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
4304 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
4305 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
4306 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
4307 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4308 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
4309 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
4310 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
4311 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
4312 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
4313 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
4314 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
4315 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
4316 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
4317 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
4318 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
4319 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
4320 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
4321 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
4322 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
4323 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
4324 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
4325 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
4326 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
4327 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4328 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
4329 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
4330
4331 /* NFSv4.1 operations */
4332 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
4333 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
4334 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
4335 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
4336 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
4337 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
4338 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
4339 #ifdef CONFIG_NFSD_PNFS
4340 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo,
4341 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4342 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit,
4343 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget,
4344 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn,
4345 #else
4346 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
4347 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4348 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
4349 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
4350 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
4351 #endif
4352 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
4353 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
4354 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
4355 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
4356 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
4357 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
4358 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
4359
4360 /* NFSv4.2 operations */
4361 [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
4362 [OP_COPY] = (nfsd4_enc)nfsd4_encode_copy,
4363 [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_noop,
4364 [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
4365 [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop,
4366 [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop,
4367 [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop,
4368 [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop,
4369 [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_noop,
4370 [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_noop,
4371 [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek,
4372 [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop,
4373 [OP_CLONE] = (nfsd4_enc)nfsd4_encode_noop,
4374 };
4375
4376 /*
4377 * Calculate whether we still have space to encode repsize bytes.
4378 * There are two considerations:
4379 * - For NFS versions >=4.1, the size of the reply must stay within
4380 * session limits
4381 * - For all NFS versions, we must stay within limited preallocated
4382 * buffer space.
4383 *
4384 * This is called before the operation is processed, so can only provide
4385 * an upper estimate. For some nonidempotent operations (such as
4386 * getattr), it's not necessarily a problem if that estimate is wrong,
4387 * as we can fail it after processing without significant side effects.
4388 */
4389 __be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
4390 {
4391 struct xdr_buf *buf = &resp->rqstp->rq_res;
4392 struct nfsd4_slot *slot = resp->cstate.slot;
4393
4394 if (buf->len + respsize <= buf->buflen)
4395 return nfs_ok;
4396 if (!nfsd4_has_session(&resp->cstate))
4397 return nfserr_resource;
4398 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
4399 WARN_ON_ONCE(1);
4400 return nfserr_rep_too_big_to_cache;
4401 }
4402 return nfserr_rep_too_big;
4403 }
4404
4405 void
4406 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
4407 {
4408 struct xdr_stream *xdr = &resp->xdr;
4409 struct nfs4_stateowner *so = resp->cstate.replay_owner;
4410 struct svc_rqst *rqstp = resp->rqstp;
4411 int post_err_offset;
4412 nfsd4_enc encoder;
4413 __be32 *p;
4414
4415 p = xdr_reserve_space(xdr, 8);
4416 if (!p) {
4417 WARN_ON_ONCE(1);
4418 return;
4419 }
4420 *p++ = cpu_to_be32(op->opnum);
4421 post_err_offset = xdr->buf->len;
4422
4423 if (op->opnum == OP_ILLEGAL)
4424 goto status;
4425 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
4426 !nfsd4_enc_ops[op->opnum]);
4427 encoder = nfsd4_enc_ops[op->opnum];
4428 op->status = encoder(resp, op->status, &op->u);
4429 xdr_commit_encode(xdr);
4430
4431 /* nfsd4_check_resp_size guarantees enough room for error status */
4432 if (!op->status) {
4433 int space_needed = 0;
4434 if (!nfsd4_last_compound_op(rqstp))
4435 space_needed = COMPOUND_ERR_SLACK_SPACE;
4436 op->status = nfsd4_check_resp_size(resp, space_needed);
4437 }
4438 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
4439 struct nfsd4_slot *slot = resp->cstate.slot;
4440
4441 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
4442 op->status = nfserr_rep_too_big_to_cache;
4443 else
4444 op->status = nfserr_rep_too_big;
4445 }
4446 if (op->status == nfserr_resource ||
4447 op->status == nfserr_rep_too_big ||
4448 op->status == nfserr_rep_too_big_to_cache) {
4449 /*
4450 * The operation may have already been encoded or
4451 * partially encoded. No op returns anything additional
4452 * in the case of one of these three errors, so we can
4453 * just truncate back to after the status. But it's a
4454 * bug if we had to do this on a non-idempotent op:
4455 */
4456 warn_on_nonidempotent_op(op);
4457 xdr_truncate_encode(xdr, post_err_offset);
4458 }
4459 if (so) {
4460 int len = xdr->buf->len - post_err_offset;
4461
4462 so->so_replay.rp_status = op->status;
4463 so->so_replay.rp_buflen = len;
4464 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
4465 so->so_replay.rp_buf, len);
4466 }
4467 status:
4468 /* Note that op->status is already in network byte order: */
4469 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
4470 }
4471
4472 /*
4473 * Encode the reply stored in the stateowner reply cache
4474 *
4475 * XDR note: do not encode rp->rp_buflen: the buffer contains the
4476 * previously sent already encoded operation.
4477 */
4478 void
4479 nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
4480 {
4481 __be32 *p;
4482 struct nfs4_replay *rp = op->replay;
4483
4484 BUG_ON(!rp);
4485
4486 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
4487 if (!p) {
4488 WARN_ON_ONCE(1);
4489 return;
4490 }
4491 *p++ = cpu_to_be32(op->opnum);
4492 *p++ = rp->rp_status; /* already xdr'ed */
4493
4494 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
4495 }
4496
4497 int
4498 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
4499 {
4500 return xdr_ressize_check(rqstp, p);
4501 }
4502
4503 int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
4504 {
4505 struct svc_rqst *rqstp = rq;
4506 struct nfsd4_compoundargs *args = rqstp->rq_argp;
4507
4508 if (args->ops != args->iops) {
4509 kfree(args->ops);
4510 args->ops = args->iops;
4511 }
4512 kfree(args->tmpp);
4513 args->tmpp = NULL;
4514 while (args->to_free) {
4515 struct svcxdr_tmpbuf *tb = args->to_free;
4516 args->to_free = tb->next;
4517 kfree(tb);
4518 }
4519 return 1;
4520 }
4521
4522 int
4523 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
4524 {
4525 if (rqstp->rq_arg.head[0].iov_len % 4) {
4526 /* client is nuts */
4527 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
4528 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
4529 return 0;
4530 }
4531 args->p = p;
4532 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
4533 args->pagelist = rqstp->rq_arg.pages;
4534 args->pagelen = rqstp->rq_arg.page_len;
4535 args->tmpp = NULL;
4536 args->to_free = NULL;
4537 args->ops = args->iops;
4538 args->rqstp = rqstp;
4539
4540 return !nfsd4_decode_compound(args);
4541 }
4542
4543 int
4544 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
4545 {
4546 /*
4547 * All that remains is to write the tag and operation count...
4548 */
4549 struct xdr_buf *buf = resp->xdr.buf;
4550
4551 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
4552 buf->tail[0].iov_len);
4553
4554 rqstp->rq_next_page = resp->xdr.page_ptr + 1;
4555
4556 p = resp->tagp;
4557 *p++ = htonl(resp->taglen);
4558 memcpy(p, resp->tag, resp->taglen);
4559 p += XDR_QUADLEN(resp->taglen);
4560 *p++ = htonl(resp->opcnt);
4561
4562 nfsd4_sequence_done(resp);
4563 return 1;
4564 }
4565
4566 /*
4567 * Local variables:
4568 * c-basic-offset: 8
4569 * End:
4570 */
Linux with added FPC-III support