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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
68static __be32
69check_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; \
88out: \
89 return status; \
90xdr_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
127static 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
140static __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
173static 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 */
186static void *
187svcxdr_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 */
206static char *
207svcxdr_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 */
228static 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 */
243static __be32
244nfsd4_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
259static __be32
260nfsd4_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
285static __be32
286nfsd4_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
449static __be32
450nfsd4_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
461static __be32
462nfsd4_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
472static __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
552static __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
563static __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
575static __be32
576nfsd4_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
588static __be32
589nfsd4_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
600static __be32
601nfsd4_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
644static inline __be32
645nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
646{
647 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
648}
649
650static inline __be32
651nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
652{
653 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
654}
655
656static __be32
657nfsd4_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
671static __be32
672nfsd4_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
711static __be32
712nfsd4_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
730static __be32
731nfsd4_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
750static __be32
751nfsd4_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
765static __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 }
814xdr_error:
815 return nfserr_bad_xdr;
816}
817
818static __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;
828xdr_error:
829 return nfserr_bad_xdr;
830}
831
832static __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;
845xdr_error:
846 return nfserr_bad_xdr;
847}
848
849static __be32
850nfsd4_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
962static __be32
963nfsd4_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
979static __be32
980nfsd4_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
999static __be32
1000nfsd4_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
1014static __be32
1015nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1016{
1017 if (argp->minorversion == 0)
1018 return nfs_ok;
1019 return nfserr_notsupp;
1020}
1021
1022static __be32
1023nfsd4_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
1037static __be32
1038nfsd4_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
1053static __be32
1054nfsd4_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
1068static __be32
1069nfsd4_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
1089static __be32
1090nfsd4_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
1103static __be32
1104nfsd4_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
1119static __be32
1120nfsd4_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
1130static __be32
1131nfsd4_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
1142static __be32
1143nfsd4_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
1172static __be32
1173nfsd4_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 */
1188static __be32
1189nfsd4_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
1207static __be32
1208nfsd4_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
1258static __be32
1259nfsd4_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
1277static __be32
1278nfsd4_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 READ_BUF(4);
1303 dummy = be32_to_cpup(p++);
1304 READ_BUF(dummy * 4);
1305 p += dummy;
1306
1307 /* spo_must_allow */
1308 READ_BUF(4);
1309 dummy = be32_to_cpup(p++);
1310 READ_BUF(dummy * 4);
1311 p += dummy;
1312 break;
1313 case SP4_SSV:
1314 /* ssp_ops */
1315 READ_BUF(4);
1316 dummy = be32_to_cpup(p++);
1317 READ_BUF(dummy * 4);
1318 p += dummy;
1319
1320 READ_BUF(4);
1321 dummy = be32_to_cpup(p++);
1322 READ_BUF(dummy * 4);
1323 p += dummy;
1324
1325 /* ssp_hash_algs<> */
1326 READ_BUF(4);
1327 tmp = be32_to_cpup(p++);
1328 while (tmp--) {
1329 READ_BUF(4);
1330 dummy = be32_to_cpup(p++);
1331 READ_BUF(dummy);
1332 p += XDR_QUADLEN(dummy);
1333 }
1334
1335 /* ssp_encr_algs<> */
1336 READ_BUF(4);
1337 tmp = be32_to_cpup(p++);
1338 while (tmp--) {
1339 READ_BUF(4);
1340 dummy = be32_to_cpup(p++);
1341 READ_BUF(dummy);
1342 p += XDR_QUADLEN(dummy);
1343 }
1344
1345 /* ssp_window and ssp_num_gss_handles */
1346 READ_BUF(8);
1347 dummy = be32_to_cpup(p++);
1348 dummy = be32_to_cpup(p++);
1349 break;
1350 default:
1351 goto xdr_error;
1352 }
1353
1354 /* Ignore Implementation ID */
1355 READ_BUF(4); /* nfs_impl_id4 array length */
1356 dummy = be32_to_cpup(p++);
1357
1358 if (dummy > 1)
1359 goto xdr_error;
1360
1361 if (dummy == 1) {
1362 /* nii_domain */
1363 READ_BUF(4);
1364 dummy = be32_to_cpup(p++);
1365 READ_BUF(dummy);
1366 p += XDR_QUADLEN(dummy);
1367
1368 /* nii_name */
1369 READ_BUF(4);
1370 dummy = be32_to_cpup(p++);
1371 READ_BUF(dummy);
1372 p += XDR_QUADLEN(dummy);
1373
1374 /* nii_date */
1375 READ_BUF(12);
1376 p += 3;
1377 }
1378 DECODE_TAIL;
1379}
1380
1381static __be32
1382nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1383 struct nfsd4_create_session *sess)
1384{
1385 DECODE_HEAD;
1386 u32 dummy;
1387
1388 READ_BUF(16);
1389 COPYMEM(&sess->clientid, 8);
1390 sess->seqid = be32_to_cpup(p++);
1391 sess->flags = be32_to_cpup(p++);
1392
1393 /* Fore channel attrs */
1394 READ_BUF(28);
1395 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1396 sess->fore_channel.maxreq_sz = be32_to_cpup(p++);
1397 sess->fore_channel.maxresp_sz = be32_to_cpup(p++);
1398 sess->fore_channel.maxresp_cached = be32_to_cpup(p++);
1399 sess->fore_channel.maxops = be32_to_cpup(p++);
1400 sess->fore_channel.maxreqs = be32_to_cpup(p++);
1401 sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++);
1402 if (sess->fore_channel.nr_rdma_attrs == 1) {
1403 READ_BUF(4);
1404 sess->fore_channel.rdma_attrs = be32_to_cpup(p++);
1405 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1406 dprintk("Too many fore channel attr bitmaps!\n");
1407 goto xdr_error;
1408 }
1409
1410 /* Back channel attrs */
1411 READ_BUF(28);
1412 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1413 sess->back_channel.maxreq_sz = be32_to_cpup(p++);
1414 sess->back_channel.maxresp_sz = be32_to_cpup(p++);
1415 sess->back_channel.maxresp_cached = be32_to_cpup(p++);
1416 sess->back_channel.maxops = be32_to_cpup(p++);
1417 sess->back_channel.maxreqs = be32_to_cpup(p++);
1418 sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++);
1419 if (sess->back_channel.nr_rdma_attrs == 1) {
1420 READ_BUF(4);
1421 sess->back_channel.rdma_attrs = be32_to_cpup(p++);
1422 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1423 dprintk("Too many back channel attr bitmaps!\n");
1424 goto xdr_error;
1425 }
1426
1427 READ_BUF(4);
1428 sess->callback_prog = be32_to_cpup(p++);
1429 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
1430 DECODE_TAIL;
1431}
1432
1433static __be32
1434nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1435 struct nfsd4_destroy_session *destroy_session)
1436{
1437 DECODE_HEAD;
1438 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1439 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1440
1441 DECODE_TAIL;
1442}
1443
1444static __be32
1445nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1446 struct nfsd4_free_stateid *free_stateid)
1447{
1448 DECODE_HEAD;
1449
1450 READ_BUF(sizeof(stateid_t));
1451 free_stateid->fr_stateid.si_generation = be32_to_cpup(p++);
1452 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1453
1454 DECODE_TAIL;
1455}
1456
1457static __be32
1458nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1459 struct nfsd4_sequence *seq)
1460{
1461 DECODE_HEAD;
1462
1463 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1464 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1465 seq->seqid = be32_to_cpup(p++);
1466 seq->slotid = be32_to_cpup(p++);
1467 seq->maxslots = be32_to_cpup(p++);
1468 seq->cachethis = be32_to_cpup(p++);
1469
1470 DECODE_TAIL;
1471}
1472
1473static __be32
1474nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1475{
1476 int i;
1477 __be32 *p, status;
1478 struct nfsd4_test_stateid_id *stateid;
1479
1480 READ_BUF(4);
1481 test_stateid->ts_num_ids = ntohl(*p++);
1482
1483 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
1484
1485 for (i = 0; i < test_stateid->ts_num_ids; i++) {
1486 stateid = svcxdr_tmpalloc(argp, sizeof(*stateid));
1487 if (!stateid) {
1488 status = nfserrno(-ENOMEM);
1489 goto out;
1490 }
1491
1492 INIT_LIST_HEAD(&stateid->ts_id_list);
1493 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1494
1495 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
1496 if (status)
1497 goto out;
1498 }
1499
1500 status = 0;
1501out:
1502 return status;
1503xdr_error:
1504 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1505 status = nfserr_bad_xdr;
1506 goto out;
1507}
1508
1509static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1510{
1511 DECODE_HEAD;
1512
1513 READ_BUF(8);
1514 COPYMEM(&dc->clientid, 8);
1515
1516 DECODE_TAIL;
1517}
1518
1519static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1520{
1521 DECODE_HEAD;
1522
1523 READ_BUF(4);
1524 rc->rca_one_fs = be32_to_cpup(p++);
1525
1526 DECODE_TAIL;
1527}
1528
1529#ifdef CONFIG_NFSD_PNFS
1530static __be32
1531nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp,
1532 struct nfsd4_getdeviceinfo *gdev)
1533{
1534 DECODE_HEAD;
1535 u32 num, i;
1536
1537 READ_BUF(sizeof(struct nfsd4_deviceid) + 3 * 4);
1538 COPYMEM(&gdev->gd_devid, sizeof(struct nfsd4_deviceid));
1539 gdev->gd_layout_type = be32_to_cpup(p++);
1540 gdev->gd_maxcount = be32_to_cpup(p++);
1541 num = be32_to_cpup(p++);
1542 if (num) {
1543 READ_BUF(4 * num);
1544 gdev->gd_notify_types = be32_to_cpup(p++);
1545 for (i = 1; i < num; i++) {
1546 if (be32_to_cpup(p++)) {
1547 status = nfserr_inval;
1548 goto out;
1549 }
1550 }
1551 }
1552 DECODE_TAIL;
1553}
1554
1555static __be32
1556nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp,
1557 struct nfsd4_layoutget *lgp)
1558{
1559 DECODE_HEAD;
1560
1561 READ_BUF(36);
1562 lgp->lg_signal = be32_to_cpup(p++);
1563 lgp->lg_layout_type = be32_to_cpup(p++);
1564 lgp->lg_seg.iomode = be32_to_cpup(p++);
1565 p = xdr_decode_hyper(p, &lgp->lg_seg.offset);
1566 p = xdr_decode_hyper(p, &lgp->lg_seg.length);
1567 p = xdr_decode_hyper(p, &lgp->lg_minlength);
1568
1569 status = nfsd4_decode_stateid(argp, &lgp->lg_sid);
1570 if (status)
1571 return status;
1572
1573 READ_BUF(4);
1574 lgp->lg_maxcount = be32_to_cpup(p++);
1575
1576 DECODE_TAIL;
1577}
1578
1579static __be32
1580nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp,
1581 struct nfsd4_layoutcommit *lcp)
1582{
1583 DECODE_HEAD;
1584 u32 timechange;
1585
1586 READ_BUF(20);
1587 p = xdr_decode_hyper(p, &lcp->lc_seg.offset);
1588 p = xdr_decode_hyper(p, &lcp->lc_seg.length);
1589 lcp->lc_reclaim = be32_to_cpup(p++);
1590
1591 status = nfsd4_decode_stateid(argp, &lcp->lc_sid);
1592 if (status)
1593 return status;
1594
1595 READ_BUF(4);
1596 lcp->lc_newoffset = be32_to_cpup(p++);
1597 if (lcp->lc_newoffset) {
1598 READ_BUF(8);
1599 p = xdr_decode_hyper(p, &lcp->lc_last_wr);
1600 } else
1601 lcp->lc_last_wr = 0;
1602 READ_BUF(4);
1603 timechange = be32_to_cpup(p++);
1604 if (timechange) {
1605 status = nfsd4_decode_time(argp, &lcp->lc_mtime);
1606 if (status)
1607 return status;
1608 } else {
1609 lcp->lc_mtime.tv_nsec = UTIME_NOW;
1610 }
1611 READ_BUF(8);
1612 lcp->lc_layout_type = be32_to_cpup(p++);
1613
1614 /*
1615 * Save the layout update in XDR format and let the layout driver deal
1616 * with it later.
1617 */
1618 lcp->lc_up_len = be32_to_cpup(p++);
1619 if (lcp->lc_up_len > 0) {
1620 READ_BUF(lcp->lc_up_len);
1621 READMEM(lcp->lc_up_layout, lcp->lc_up_len);
1622 }
1623
1624 DECODE_TAIL;
1625}
1626
1627static __be32
1628nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp,
1629 struct nfsd4_layoutreturn *lrp)
1630{
1631 DECODE_HEAD;
1632
1633 READ_BUF(16);
1634 lrp->lr_reclaim = be32_to_cpup(p++);
1635 lrp->lr_layout_type = be32_to_cpup(p++);
1636 lrp->lr_seg.iomode = be32_to_cpup(p++);
1637 lrp->lr_return_type = be32_to_cpup(p++);
1638 if (lrp->lr_return_type == RETURN_FILE) {
1639 READ_BUF(16);
1640 p = xdr_decode_hyper(p, &lrp->lr_seg.offset);
1641 p = xdr_decode_hyper(p, &lrp->lr_seg.length);
1642
1643 status = nfsd4_decode_stateid(argp, &lrp->lr_sid);
1644 if (status)
1645 return status;
1646
1647 READ_BUF(4);
1648 lrp->lrf_body_len = be32_to_cpup(p++);
1649 if (lrp->lrf_body_len > 0) {
1650 READ_BUF(lrp->lrf_body_len);
1651 READMEM(lrp->lrf_body, lrp->lrf_body_len);
1652 }
1653 } else {
1654 lrp->lr_seg.offset = 0;
1655 lrp->lr_seg.length = NFS4_MAX_UINT64;
1656 }
1657
1658 DECODE_TAIL;
1659}
1660#endif /* CONFIG_NFSD_PNFS */
1661
1662static __be32
1663nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp,
1664 struct nfsd4_fallocate *fallocate)
1665{
1666 DECODE_HEAD;
1667
1668 status = nfsd4_decode_stateid(argp, &fallocate->falloc_stateid);
1669 if (status)
1670 return status;
1671
1672 READ_BUF(16);
1673 p = xdr_decode_hyper(p, &fallocate->falloc_offset);
1674 xdr_decode_hyper(p, &fallocate->falloc_length);
1675
1676 DECODE_TAIL;
1677}
1678
1679static __be32
1680nfsd4_decode_clone(struct nfsd4_compoundargs *argp, struct nfsd4_clone *clone)
1681{
1682 DECODE_HEAD;
1683
1684 status = nfsd4_decode_stateid(argp, &clone->cl_src_stateid);
1685 if (status)
1686 return status;
1687 status = nfsd4_decode_stateid(argp, &clone->cl_dst_stateid);
1688 if (status)
1689 return status;
1690
1691 READ_BUF(8 + 8 + 8);
1692 p = xdr_decode_hyper(p, &clone->cl_src_pos);
1693 p = xdr_decode_hyper(p, &clone->cl_dst_pos);
1694 p = xdr_decode_hyper(p, &clone->cl_count);
1695 DECODE_TAIL;
1696}
1697
1698static __be32
1699nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek)
1700{
1701 DECODE_HEAD;
1702
1703 status = nfsd4_decode_stateid(argp, &seek->seek_stateid);
1704 if (status)
1705 return status;
1706
1707 READ_BUF(8 + 4);
1708 p = xdr_decode_hyper(p, &seek->seek_offset);
1709 seek->seek_whence = be32_to_cpup(p);
1710
1711 DECODE_TAIL;
1712}
1713
1714static __be32
1715nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1716{
1717 return nfs_ok;
1718}
1719
1720static __be32
1721nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1722{
1723 return nfserr_notsupp;
1724}
1725
1726typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1727
1728static nfsd4_dec nfsd4_dec_ops[] = {
1729 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1730 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1731 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1732 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1733 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1734 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1735 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1736 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1737 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1738 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1739 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1740 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1741 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1742 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1743 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1744 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1745 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1746 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1747 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1748 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1749 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
1750 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1751 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1752 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1753 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1754 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1755 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1756 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1757 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1758 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1759 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1760 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1761 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1762 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1763 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1764 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1765 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
1766
1767 /* new operations for NFSv4.1 */
1768 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1769 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
1770 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1771 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1772 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
1773 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
1774 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1775#ifdef CONFIG_NFSD_PNFS
1776 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo,
1777 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1778 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit,
1779 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget,
1780 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn,
1781#else
1782 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1783 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1784 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1785 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1786 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
1787#endif
1788 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
1789 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1790 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
1791 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
1792 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1793 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
1794 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
1795
1796 /* new operations for NFSv4.2 */
1797 [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
1798 [OP_COPY] = (nfsd4_dec)nfsd4_decode_notsupp,
1799 [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_notsupp,
1800 [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
1801 [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp,
1802 [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp,
1803 [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp,
1804 [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_notsupp,
1805 [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_notsupp,
1806 [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_notsupp,
1807 [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek,
1808 [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp,
1809 [OP_CLONE] = (nfsd4_dec)nfsd4_decode_clone,
1810};
1811
1812static inline bool
1813nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
1814{
1815 if (op->opnum < FIRST_NFS4_OP)
1816 return false;
1817 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
1818 return false;
1819 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
1820 return false;
1821 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
1822 return false;
1823 return true;
1824}
1825
1826static __be32
1827nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1828{
1829 DECODE_HEAD;
1830 struct nfsd4_op *op;
1831 bool cachethis = false;
1832 int auth_slack= argp->rqstp->rq_auth_slack;
1833 int max_reply = auth_slack + 8; /* opcnt, status */
1834 int readcount = 0;
1835 int readbytes = 0;
1836 int i;
1837
1838 READ_BUF(4);
1839 argp->taglen = be32_to_cpup(p++);
1840 READ_BUF(argp->taglen);
1841 SAVEMEM(argp->tag, argp->taglen);
1842 READ_BUF(8);
1843 argp->minorversion = be32_to_cpup(p++);
1844 argp->opcnt = be32_to_cpup(p++);
1845 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
1846
1847 if (argp->taglen > NFSD4_MAX_TAGLEN)
1848 goto xdr_error;
1849 if (argp->opcnt > 100)
1850 goto xdr_error;
1851
1852 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1853 argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1854 if (!argp->ops) {
1855 argp->ops = argp->iops;
1856 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1857 goto xdr_error;
1858 }
1859 }
1860
1861 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
1862 argp->opcnt = 0;
1863
1864 for (i = 0; i < argp->opcnt; i++) {
1865 op = &argp->ops[i];
1866 op->replay = NULL;
1867
1868 READ_BUF(4);
1869 op->opnum = be32_to_cpup(p++);
1870
1871 if (nfsd4_opnum_in_range(argp, op))
1872 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
1873 else {
1874 op->opnum = OP_ILLEGAL;
1875 op->status = nfserr_op_illegal;
1876 }
1877 /*
1878 * We'll try to cache the result in the DRC if any one
1879 * op in the compound wants to be cached:
1880 */
1881 cachethis |= nfsd4_cache_this_op(op);
1882
1883 if (op->opnum == OP_READ) {
1884 readcount++;
1885 readbytes += nfsd4_max_reply(argp->rqstp, op);
1886 } else
1887 max_reply += nfsd4_max_reply(argp->rqstp, op);
1888 /*
1889 * OP_LOCK may return a conflicting lock. (Special case
1890 * because it will just skip encoding this if it runs
1891 * out of xdr buffer space, and it is the only operation
1892 * that behaves this way.)
1893 */
1894 if (op->opnum == OP_LOCK)
1895 max_reply += NFS4_OPAQUE_LIMIT;
1896
1897 if (op->status) {
1898 argp->opcnt = i+1;
1899 break;
1900 }
1901 }
1902 /* Sessions make the DRC unnecessary: */
1903 if (argp->minorversion)
1904 cachethis = false;
1905 svc_reserve(argp->rqstp, max_reply + readbytes);
1906 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1907
1908 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
1909 clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags);
1910
1911 DECODE_TAIL;
1912}
1913
1914static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode)
1915{
1916 if (IS_I_VERSION(inode)) {
1917 p = xdr_encode_hyper(p, inode->i_version);
1918 } else {
1919 *p++ = cpu_to_be32(stat->ctime.tv_sec);
1920 *p++ = cpu_to_be32(stat->ctime.tv_nsec);
1921 }
1922 return p;
1923}
1924
1925static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
1926{
1927 *p++ = cpu_to_be32(c->atomic);
1928 if (c->change_supported) {
1929 p = xdr_encode_hyper(p, c->before_change);
1930 p = xdr_encode_hyper(p, c->after_change);
1931 } else {
1932 *p++ = cpu_to_be32(c->before_ctime_sec);
1933 *p++ = cpu_to_be32(c->before_ctime_nsec);
1934 *p++ = cpu_to_be32(c->after_ctime_sec);
1935 *p++ = cpu_to_be32(c->after_ctime_nsec);
1936 }
1937 return p;
1938}
1939
1940/* Encode as an array of strings the string given with components
1941 * separated @sep, escaped with esc_enter and esc_exit.
1942 */
1943static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
1944 char *components, char esc_enter,
1945 char esc_exit)
1946{
1947 __be32 *p;
1948 __be32 pathlen;
1949 int pathlen_offset;
1950 int strlen, count=0;
1951 char *str, *end, *next;
1952
1953 dprintk("nfsd4_encode_components(%s)\n", components);
1954
1955 pathlen_offset = xdr->buf->len;
1956 p = xdr_reserve_space(xdr, 4);
1957 if (!p)
1958 return nfserr_resource;
1959 p++; /* We will fill this in with @count later */
1960
1961 end = str = components;
1962 while (*end) {
1963 bool found_esc = false;
1964
1965 /* try to parse as esc_start, ..., esc_end, sep */
1966 if (*str == esc_enter) {
1967 for (; *end && (*end != esc_exit); end++)
1968 /* find esc_exit or end of string */;
1969 next = end + 1;
1970 if (*end && (!*next || *next == sep)) {
1971 str++;
1972 found_esc = true;
1973 }
1974 }
1975
1976 if (!found_esc)
1977 for (; *end && (*end != sep); end++)
1978 /* find sep or end of string */;
1979
1980 strlen = end - str;
1981 if (strlen) {
1982 p = xdr_reserve_space(xdr, strlen + 4);
1983 if (!p)
1984 return nfserr_resource;
1985 p = xdr_encode_opaque(p, str, strlen);
1986 count++;
1987 }
1988 else
1989 end++;
1990 if (found_esc)
1991 end = next;
1992
1993 str = end;
1994 }
1995 pathlen = htonl(count);
1996 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
1997 return 0;
1998}
1999
2000/* Encode as an array of strings the string given with components
2001 * separated @sep.
2002 */
2003static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
2004 char *components)
2005{
2006 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
2007}
2008
2009/*
2010 * encode a location element of a fs_locations structure
2011 */
2012static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
2013 struct nfsd4_fs_location *location)
2014{
2015 __be32 status;
2016
2017 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
2018 '[', ']');
2019 if (status)
2020 return status;
2021 status = nfsd4_encode_components(xdr, '/', location->path);
2022 if (status)
2023 return status;
2024 return 0;
2025}
2026
2027/*
2028 * Encode a path in RFC3530 'pathname4' format
2029 */
2030static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
2031 const struct path *root,
2032 const struct path *path)
2033{
2034 struct path cur = *path;
2035 __be32 *p;
2036 struct dentry **components = NULL;
2037 unsigned int ncomponents = 0;
2038 __be32 err = nfserr_jukebox;
2039
2040 dprintk("nfsd4_encode_components(");
2041
2042 path_get(&cur);
2043 /* First walk the path up to the nfsd root, and store the
2044 * dentries/path components in an array.
2045 */
2046 for (;;) {
2047 if (path_equal(&cur, root))
2048 break;
2049 if (cur.dentry == cur.mnt->mnt_root) {
2050 if (follow_up(&cur))
2051 continue;
2052 goto out_free;
2053 }
2054 if ((ncomponents & 15) == 0) {
2055 struct dentry **new;
2056 new = krealloc(components,
2057 sizeof(*new) * (ncomponents + 16),
2058 GFP_KERNEL);
2059 if (!new)
2060 goto out_free;
2061 components = new;
2062 }
2063 components[ncomponents++] = cur.dentry;
2064 cur.dentry = dget_parent(cur.dentry);
2065 }
2066 err = nfserr_resource;
2067 p = xdr_reserve_space(xdr, 4);
2068 if (!p)
2069 goto out_free;
2070 *p++ = cpu_to_be32(ncomponents);
2071
2072 while (ncomponents) {
2073 struct dentry *dentry = components[ncomponents - 1];
2074 unsigned int len;
2075
2076 spin_lock(&dentry->d_lock);
2077 len = dentry->d_name.len;
2078 p = xdr_reserve_space(xdr, len + 4);
2079 if (!p) {
2080 spin_unlock(&dentry->d_lock);
2081 goto out_free;
2082 }
2083 p = xdr_encode_opaque(p, dentry->d_name.name, len);
2084 dprintk("/%pd", dentry);
2085 spin_unlock(&dentry->d_lock);
2086 dput(dentry);
2087 ncomponents--;
2088 }
2089
2090 err = 0;
2091out_free:
2092 dprintk(")\n");
2093 while (ncomponents)
2094 dput(components[--ncomponents]);
2095 kfree(components);
2096 path_put(&cur);
2097 return err;
2098}
2099
2100static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
2101 struct svc_rqst *rqstp, const struct path *path)
2102{
2103 struct svc_export *exp_ps;
2104 __be32 res;
2105
2106 exp_ps = rqst_find_fsidzero_export(rqstp);
2107 if (IS_ERR(exp_ps))
2108 return nfserrno(PTR_ERR(exp_ps));
2109 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
2110 exp_put(exp_ps);
2111 return res;
2112}
2113
2114/*
2115 * encode a fs_locations structure
2116 */
2117static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
2118 struct svc_rqst *rqstp, struct svc_export *exp)
2119{
2120 __be32 status;
2121 int i;
2122 __be32 *p;
2123 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
2124
2125 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
2126 if (status)
2127 return status;
2128 p = xdr_reserve_space(xdr, 4);
2129 if (!p)
2130 return nfserr_resource;
2131 *p++ = cpu_to_be32(fslocs->locations_count);
2132 for (i=0; i<fslocs->locations_count; i++) {
2133 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
2134 if (status)
2135 return status;
2136 }
2137 return 0;
2138}
2139
2140static u32 nfs4_file_type(umode_t mode)
2141{
2142 switch (mode & S_IFMT) {
2143 case S_IFIFO: return NF4FIFO;
2144 case S_IFCHR: return NF4CHR;
2145 case S_IFDIR: return NF4DIR;
2146 case S_IFBLK: return NF4BLK;
2147 case S_IFLNK: return NF4LNK;
2148 case S_IFREG: return NF4REG;
2149 case S_IFSOCK: return NF4SOCK;
2150 default: return NF4BAD;
2151 };
2152}
2153
2154static inline __be32
2155nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2156 struct nfs4_ace *ace)
2157{
2158 if (ace->whotype != NFS4_ACL_WHO_NAMED)
2159 return nfs4_acl_write_who(xdr, ace->whotype);
2160 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
2161 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
2162 else
2163 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
2164}
2165
2166static inline __be32
2167nfsd4_encode_layout_type(struct xdr_stream *xdr, enum pnfs_layouttype layout_type)
2168{
2169 __be32 *p;
2170
2171 if (layout_type) {
2172 p = xdr_reserve_space(xdr, 8);
2173 if (!p)
2174 return nfserr_resource;
2175 *p++ = cpu_to_be32(1);
2176 *p++ = cpu_to_be32(layout_type);
2177 } else {
2178 p = xdr_reserve_space(xdr, 4);
2179 if (!p)
2180 return nfserr_resource;
2181 *p++ = cpu_to_be32(0);
2182 }
2183
2184 return 0;
2185}
2186
2187#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
2188 FATTR4_WORD0_RDATTR_ERROR)
2189#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
2190#define WORD2_ABSENT_FS_ATTRS 0
2191
2192#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2193static inline __be32
2194nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2195 void *context, int len)
2196{
2197 __be32 *p;
2198
2199 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
2200 if (!p)
2201 return nfserr_resource;
2202
2203 /*
2204 * For now we use a 0 here to indicate the null translation; in
2205 * the future we may place a call to translation code here.
2206 */
2207 *p++ = cpu_to_be32(0); /* lfs */
2208 *p++ = cpu_to_be32(0); /* pi */
2209 p = xdr_encode_opaque(p, context, len);
2210 return 0;
2211}
2212#else
2213static inline __be32
2214nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2215 void *context, int len)
2216{ return 0; }
2217#endif
2218
2219static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err)
2220{
2221 /* As per referral draft: */
2222 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2223 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2224 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2225 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2226 *rdattr_err = NFSERR_MOVED;
2227 else
2228 return nfserr_moved;
2229 }
2230 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2231 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
2232 *bmval2 &= WORD2_ABSENT_FS_ATTRS;
2233 return 0;
2234}
2235
2236
2237static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2238{
2239 struct path path = exp->ex_path;
2240 int err;
2241
2242 path_get(&path);
2243 while (follow_up(&path)) {
2244 if (path.dentry != path.mnt->mnt_root)
2245 break;
2246 }
2247 err = vfs_getattr(&path, stat);
2248 path_put(&path);
2249 return err;
2250}
2251
2252static __be32
2253nfsd4_encode_bitmap(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2)
2254{
2255 __be32 *p;
2256
2257 if (bmval2) {
2258 p = xdr_reserve_space(xdr, 16);
2259 if (!p)
2260 goto out_resource;
2261 *p++ = cpu_to_be32(3);
2262 *p++ = cpu_to_be32(bmval0);
2263 *p++ = cpu_to_be32(bmval1);
2264 *p++ = cpu_to_be32(bmval2);
2265 } else if (bmval1) {
2266 p = xdr_reserve_space(xdr, 12);
2267 if (!p)
2268 goto out_resource;
2269 *p++ = cpu_to_be32(2);
2270 *p++ = cpu_to_be32(bmval0);
2271 *p++ = cpu_to_be32(bmval1);
2272 } else {
2273 p = xdr_reserve_space(xdr, 8);
2274 if (!p)
2275 goto out_resource;
2276 *p++ = cpu_to_be32(1);
2277 *p++ = cpu_to_be32(bmval0);
2278 }
2279
2280 return 0;
2281out_resource:
2282 return nfserr_resource;
2283}
2284
2285/*
2286 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2287 * ourselves.
2288 */
2289static __be32
2290nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2291 struct svc_export *exp,
2292 struct dentry *dentry, u32 *bmval,
2293 struct svc_rqst *rqstp, int ignore_crossmnt)
2294{
2295 u32 bmval0 = bmval[0];
2296 u32 bmval1 = bmval[1];
2297 u32 bmval2 = bmval[2];
2298 struct kstat stat;
2299 struct svc_fh *tempfh = NULL;
2300 struct kstatfs statfs;
2301 __be32 *p;
2302 int starting_len = xdr->buf->len;
2303 int attrlen_offset;
2304 __be32 attrlen;
2305 u32 dummy;
2306 u64 dummy64;
2307 u32 rdattr_err = 0;
2308 __be32 status;
2309 int err;
2310 struct nfs4_acl *acl = NULL;
2311 void *context = NULL;
2312 int contextlen;
2313 bool contextsupport = false;
2314 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2315 u32 minorversion = resp->cstate.minorversion;
2316 struct path path = {
2317 .mnt = exp->ex_path.mnt,
2318 .dentry = dentry,
2319 };
2320 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2321
2322 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
2323 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
2324 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
2325 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
2326
2327 if (exp->ex_fslocs.migrated) {
2328 status = fattr_handle_absent_fs(&bmval0, &bmval1, &bmval2, &rdattr_err);
2329 if (status)
2330 goto out;
2331 }
2332
2333 err = vfs_getattr(&path, &stat);
2334 if (err)
2335 goto out_nfserr;
2336 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2337 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
2338 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2339 FATTR4_WORD1_SPACE_TOTAL))) {
2340 err = vfs_statfs(&path, &statfs);
2341 if (err)
2342 goto out_nfserr;
2343 }
2344 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
2345 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2346 status = nfserr_jukebox;
2347 if (!tempfh)
2348 goto out;
2349 fh_init(tempfh, NFS4_FHSIZE);
2350 status = fh_compose(tempfh, exp, dentry, NULL);
2351 if (status)
2352 goto out;
2353 fhp = tempfh;
2354 }
2355 if (bmval0 & FATTR4_WORD0_ACL) {
2356 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2357 if (err == -EOPNOTSUPP)
2358 bmval0 &= ~FATTR4_WORD0_ACL;
2359 else if (err == -EINVAL) {
2360 status = nfserr_attrnotsupp;
2361 goto out;
2362 } else if (err != 0)
2363 goto out_nfserr;
2364 }
2365
2366#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2367 if ((bmval2 & FATTR4_WORD2_SECURITY_LABEL) ||
2368 bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2369 err = security_inode_getsecctx(d_inode(dentry),
2370 &context, &contextlen);
2371 contextsupport = (err == 0);
2372 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2373 if (err == -EOPNOTSUPP)
2374 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2375 else if (err)
2376 goto out_nfserr;
2377 }
2378 }
2379#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2380
2381 status = nfsd4_encode_bitmap(xdr, bmval0, bmval1, bmval2);
2382 if (status)
2383 goto out;
2384
2385 attrlen_offset = xdr->buf->len;
2386 p = xdr_reserve_space(xdr, 4);
2387 if (!p)
2388 goto out_resource;
2389 p++; /* to be backfilled later */
2390
2391 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2392 u32 word0 = nfsd_suppattrs0(minorversion);
2393 u32 word1 = nfsd_suppattrs1(minorversion);
2394 u32 word2 = nfsd_suppattrs2(minorversion);
2395
2396 if (!IS_POSIXACL(dentry->d_inode))
2397 word0 &= ~FATTR4_WORD0_ACL;
2398 if (!contextsupport)
2399 word2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2400 if (!word2) {
2401 p = xdr_reserve_space(xdr, 12);
2402 if (!p)
2403 goto out_resource;
2404 *p++ = cpu_to_be32(2);
2405 *p++ = cpu_to_be32(word0);
2406 *p++ = cpu_to_be32(word1);
2407 } else {
2408 p = xdr_reserve_space(xdr, 16);
2409 if (!p)
2410 goto out_resource;
2411 *p++ = cpu_to_be32(3);
2412 *p++ = cpu_to_be32(word0);
2413 *p++ = cpu_to_be32(word1);
2414 *p++ = cpu_to_be32(word2);
2415 }
2416 }
2417 if (bmval0 & FATTR4_WORD0_TYPE) {
2418 p = xdr_reserve_space(xdr, 4);
2419 if (!p)
2420 goto out_resource;
2421 dummy = nfs4_file_type(stat.mode);
2422 if (dummy == NF4BAD) {
2423 status = nfserr_serverfault;
2424 goto out;
2425 }
2426 *p++ = cpu_to_be32(dummy);
2427 }
2428 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
2429 p = xdr_reserve_space(xdr, 4);
2430 if (!p)
2431 goto out_resource;
2432 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
2433 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
2434 else
2435 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2436 NFS4_FH_VOL_RENAME);
2437 }
2438 if (bmval0 & FATTR4_WORD0_CHANGE) {
2439 p = xdr_reserve_space(xdr, 8);
2440 if (!p)
2441 goto out_resource;
2442 p = encode_change(p, &stat, d_inode(dentry));
2443 }
2444 if (bmval0 & FATTR4_WORD0_SIZE) {
2445 p = xdr_reserve_space(xdr, 8);
2446 if (!p)
2447 goto out_resource;
2448 p = xdr_encode_hyper(p, stat.size);
2449 }
2450 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
2451 p = xdr_reserve_space(xdr, 4);
2452 if (!p)
2453 goto out_resource;
2454 *p++ = cpu_to_be32(1);
2455 }
2456 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
2457 p = xdr_reserve_space(xdr, 4);
2458 if (!p)
2459 goto out_resource;
2460 *p++ = cpu_to_be32(1);
2461 }
2462 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
2463 p = xdr_reserve_space(xdr, 4);
2464 if (!p)
2465 goto out_resource;
2466 *p++ = cpu_to_be32(0);
2467 }
2468 if (bmval0 & FATTR4_WORD0_FSID) {
2469 p = xdr_reserve_space(xdr, 16);
2470 if (!p)
2471 goto out_resource;
2472 if (exp->ex_fslocs.migrated) {
2473 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
2474 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
2475 } else switch(fsid_source(fhp)) {
2476 case FSIDSOURCE_FSID:
2477 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
2478 p = xdr_encode_hyper(p, (u64)0);
2479 break;
2480 case FSIDSOURCE_DEV:
2481 *p++ = cpu_to_be32(0);
2482 *p++ = cpu_to_be32(MAJOR(stat.dev));
2483 *p++ = cpu_to_be32(0);
2484 *p++ = cpu_to_be32(MINOR(stat.dev));
2485 break;
2486 case FSIDSOURCE_UUID:
2487 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
2488 EX_UUID_LEN);
2489 break;
2490 }
2491 }
2492 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
2493 p = xdr_reserve_space(xdr, 4);
2494 if (!p)
2495 goto out_resource;
2496 *p++ = cpu_to_be32(0);
2497 }
2498 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
2499 p = xdr_reserve_space(xdr, 4);
2500 if (!p)
2501 goto out_resource;
2502 *p++ = cpu_to_be32(nn->nfsd4_lease);
2503 }
2504 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
2505 p = xdr_reserve_space(xdr, 4);
2506 if (!p)
2507 goto out_resource;
2508 *p++ = cpu_to_be32(rdattr_err);
2509 }
2510 if (bmval0 & FATTR4_WORD0_ACL) {
2511 struct nfs4_ace *ace;
2512
2513 if (acl == NULL) {
2514 p = xdr_reserve_space(xdr, 4);
2515 if (!p)
2516 goto out_resource;
2517
2518 *p++ = cpu_to_be32(0);
2519 goto out_acl;
2520 }
2521 p = xdr_reserve_space(xdr, 4);
2522 if (!p)
2523 goto out_resource;
2524 *p++ = cpu_to_be32(acl->naces);
2525
2526 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
2527 p = xdr_reserve_space(xdr, 4*3);
2528 if (!p)
2529 goto out_resource;
2530 *p++ = cpu_to_be32(ace->type);
2531 *p++ = cpu_to_be32(ace->flag);
2532 *p++ = cpu_to_be32(ace->access_mask &
2533 NFS4_ACE_MASK_ALL);
2534 status = nfsd4_encode_aclname(xdr, rqstp, ace);
2535 if (status)
2536 goto out;
2537 }
2538 }
2539out_acl:
2540 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
2541 p = xdr_reserve_space(xdr, 4);
2542 if (!p)
2543 goto out_resource;
2544 *p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ?
2545 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2546 }
2547 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
2548 p = xdr_reserve_space(xdr, 4);
2549 if (!p)
2550 goto out_resource;
2551 *p++ = cpu_to_be32(1);
2552 }
2553 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
2554 p = xdr_reserve_space(xdr, 4);
2555 if (!p)
2556 goto out_resource;
2557 *p++ = cpu_to_be32(0);
2558 }
2559 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
2560 p = xdr_reserve_space(xdr, 4);
2561 if (!p)
2562 goto out_resource;
2563 *p++ = cpu_to_be32(1);
2564 }
2565 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2566 p = xdr_reserve_space(xdr, 4);
2567 if (!p)
2568 goto out_resource;
2569 *p++ = cpu_to_be32(1);
2570 }
2571 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2572 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
2573 if (!p)
2574 goto out_resource;
2575 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
2576 fhp->fh_handle.fh_size);
2577 }
2578 if (bmval0 & FATTR4_WORD0_FILEID) {
2579 p = xdr_reserve_space(xdr, 8);
2580 if (!p)
2581 goto out_resource;
2582 p = xdr_encode_hyper(p, stat.ino);
2583 }
2584 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2585 p = xdr_reserve_space(xdr, 8);
2586 if (!p)
2587 goto out_resource;
2588 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
2589 }
2590 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2591 p = xdr_reserve_space(xdr, 8);
2592 if (!p)
2593 goto out_resource;
2594 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
2595 }
2596 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2597 p = xdr_reserve_space(xdr, 8);
2598 if (!p)
2599 goto out_resource;
2600 p = xdr_encode_hyper(p, (u64) statfs.f_files);
2601 }
2602 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2603 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
2604 if (status)
2605 goto out;
2606 }
2607 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2608 p = xdr_reserve_space(xdr, 4);
2609 if (!p)
2610 goto out_resource;
2611 *p++ = cpu_to_be32(1);
2612 }
2613 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2614 p = xdr_reserve_space(xdr, 8);
2615 if (!p)
2616 goto out_resource;
2617 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
2618 }
2619 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2620 p = xdr_reserve_space(xdr, 4);
2621 if (!p)
2622 goto out_resource;
2623 *p++ = cpu_to_be32(255);
2624 }
2625 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2626 p = xdr_reserve_space(xdr, 4);
2627 if (!p)
2628 goto out_resource;
2629 *p++ = cpu_to_be32(statfs.f_namelen);
2630 }
2631 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2632 p = xdr_reserve_space(xdr, 8);
2633 if (!p)
2634 goto out_resource;
2635 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
2636 }
2637 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2638 p = xdr_reserve_space(xdr, 8);
2639 if (!p)
2640 goto out_resource;
2641 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
2642 }
2643 if (bmval1 & FATTR4_WORD1_MODE) {
2644 p = xdr_reserve_space(xdr, 4);
2645 if (!p)
2646 goto out_resource;
2647 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
2648 }
2649 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2650 p = xdr_reserve_space(xdr, 4);
2651 if (!p)
2652 goto out_resource;
2653 *p++ = cpu_to_be32(1);
2654 }
2655 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2656 p = xdr_reserve_space(xdr, 4);
2657 if (!p)
2658 goto out_resource;
2659 *p++ = cpu_to_be32(stat.nlink);
2660 }
2661 if (bmval1 & FATTR4_WORD1_OWNER) {
2662 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
2663 if (status)
2664 goto out;
2665 }
2666 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2667 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
2668 if (status)
2669 goto out;
2670 }
2671 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2672 p = xdr_reserve_space(xdr, 8);
2673 if (!p)
2674 goto out_resource;
2675 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
2676 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
2677 }
2678 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2679 p = xdr_reserve_space(xdr, 8);
2680 if (!p)
2681 goto out_resource;
2682 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2683 p = xdr_encode_hyper(p, dummy64);
2684 }
2685 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2686 p = xdr_reserve_space(xdr, 8);
2687 if (!p)
2688 goto out_resource;
2689 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2690 p = xdr_encode_hyper(p, dummy64);
2691 }
2692 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2693 p = xdr_reserve_space(xdr, 8);
2694 if (!p)
2695 goto out_resource;
2696 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2697 p = xdr_encode_hyper(p, dummy64);
2698 }
2699 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2700 p = xdr_reserve_space(xdr, 8);
2701 if (!p)
2702 goto out_resource;
2703 dummy64 = (u64)stat.blocks << 9;
2704 p = xdr_encode_hyper(p, dummy64);
2705 }
2706 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2707 p = xdr_reserve_space(xdr, 12);
2708 if (!p)
2709 goto out_resource;
2710 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
2711 *p++ = cpu_to_be32(stat.atime.tv_nsec);
2712 }
2713 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2714 p = xdr_reserve_space(xdr, 12);
2715 if (!p)
2716 goto out_resource;
2717 *p++ = cpu_to_be32(0);
2718 *p++ = cpu_to_be32(1);
2719 *p++ = cpu_to_be32(0);
2720 }
2721 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2722 p = xdr_reserve_space(xdr, 12);
2723 if (!p)
2724 goto out_resource;
2725 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
2726 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
2727 }
2728 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2729 p = xdr_reserve_space(xdr, 12);
2730 if (!p)
2731 goto out_resource;
2732 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
2733 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
2734 }
2735 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
2736 struct kstat parent_stat;
2737 u64 ino = stat.ino;
2738
2739 p = xdr_reserve_space(xdr, 8);
2740 if (!p)
2741 goto out_resource;
2742 /*
2743 * Get parent's attributes if not ignoring crossmount
2744 * and this is the root of a cross-mounted filesystem.
2745 */
2746 if (ignore_crossmnt == 0 &&
2747 dentry == exp->ex_path.mnt->mnt_root) {
2748 err = get_parent_attributes(exp, &parent_stat);
2749 if (err)
2750 goto out_nfserr;
2751 ino = parent_stat.ino;
2752 }
2753 p = xdr_encode_hyper(p, ino);
2754 }
2755#ifdef CONFIG_NFSD_PNFS
2756 if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) {
2757 status = nfsd4_encode_layout_type(xdr, exp->ex_layout_type);
2758 if (status)
2759 goto out;
2760 }
2761
2762 if (bmval2 & FATTR4_WORD2_LAYOUT_TYPES) {
2763 status = nfsd4_encode_layout_type(xdr, exp->ex_layout_type);
2764 if (status)
2765 goto out;
2766 }
2767
2768 if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) {
2769 p = xdr_reserve_space(xdr, 4);
2770 if (!p)
2771 goto out_resource;
2772 *p++ = cpu_to_be32(stat.blksize);
2773 }
2774#endif /* CONFIG_NFSD_PNFS */
2775 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2776 status = nfsd4_encode_bitmap(xdr, NFSD_SUPPATTR_EXCLCREAT_WORD0,
2777 NFSD_SUPPATTR_EXCLCREAT_WORD1,
2778 NFSD_SUPPATTR_EXCLCREAT_WORD2);
2779 if (status)
2780 goto out;
2781 }
2782
2783 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2784 status = nfsd4_encode_security_label(xdr, rqstp, context,
2785 contextlen);
2786 if (status)
2787 goto out;
2788 }
2789
2790 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
2791 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
2792 status = nfs_ok;
2793
2794out:
2795#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2796 if (context)
2797 security_release_secctx(context, contextlen);
2798#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2799 kfree(acl);
2800 if (tempfh) {
2801 fh_put(tempfh);
2802 kfree(tempfh);
2803 }
2804 if (status)
2805 xdr_truncate_encode(xdr, starting_len);
2806 return status;
2807out_nfserr:
2808 status = nfserrno(err);
2809 goto out;
2810out_resource:
2811 status = nfserr_resource;
2812 goto out;
2813}
2814
2815static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
2816 struct xdr_buf *buf, __be32 *p, int bytes)
2817{
2818 xdr->scratch.iov_len = 0;
2819 memset(buf, 0, sizeof(struct xdr_buf));
2820 buf->head[0].iov_base = p;
2821 buf->head[0].iov_len = 0;
2822 buf->len = 0;
2823 xdr->buf = buf;
2824 xdr->iov = buf->head;
2825 xdr->p = p;
2826 xdr->end = (void *)p + bytes;
2827 buf->buflen = bytes;
2828}
2829
2830__be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
2831 struct svc_fh *fhp, struct svc_export *exp,
2832 struct dentry *dentry, u32 *bmval,
2833 struct svc_rqst *rqstp, int ignore_crossmnt)
2834{
2835 struct xdr_buf dummy;
2836 struct xdr_stream xdr;
2837 __be32 ret;
2838
2839 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
2840 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
2841 ignore_crossmnt);
2842 *p = xdr.p;
2843 return ret;
2844}
2845
2846static inline int attributes_need_mount(u32 *bmval)
2847{
2848 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2849 return 1;
2850 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2851 return 1;
2852 return 0;
2853}
2854
2855static __be32
2856nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
2857 const char *name, int namlen)
2858{
2859 struct svc_export *exp = cd->rd_fhp->fh_export;
2860 struct dentry *dentry;
2861 __be32 nfserr;
2862 int ignore_crossmnt = 0;
2863
2864 dentry = lookup_one_len_unlocked(name, cd->rd_fhp->fh_dentry, namlen);
2865 if (IS_ERR(dentry))
2866 return nfserrno(PTR_ERR(dentry));
2867 if (d_really_is_negative(dentry)) {
2868 /*
2869 * we're not holding the i_mutex here, so there's
2870 * a window where this directory entry could have gone
2871 * away.
2872 */
2873 dput(dentry);
2874 return nfserr_noent;
2875 }
2876
2877 exp_get(exp);
2878 /*
2879 * In the case of a mountpoint, the client may be asking for
2880 * attributes that are only properties of the underlying filesystem
2881 * as opposed to the cross-mounted file system. In such a case,
2882 * we will not follow the cross mount and will fill the attribtutes
2883 * directly from the mountpoint dentry.
2884 */
2885 if (nfsd_mountpoint(dentry, exp)) {
2886 int err;
2887
2888 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2889 && !attributes_need_mount(cd->rd_bmval)) {
2890 ignore_crossmnt = 1;
2891 goto out_encode;
2892 }
2893 /*
2894 * Why the heck aren't we just using nfsd_lookup??
2895 * Different "."/".." handling? Something else?
2896 * At least, add a comment here to explain....
2897 */
2898 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2899 if (err) {
2900 nfserr = nfserrno(err);
2901 goto out_put;
2902 }
2903 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2904 if (nfserr)
2905 goto out_put;
2906
2907 }
2908out_encode:
2909 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
2910 cd->rd_rqstp, ignore_crossmnt);
2911out_put:
2912 dput(dentry);
2913 exp_put(exp);
2914 return nfserr;
2915}
2916
2917static __be32 *
2918nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
2919{
2920 __be32 *p;
2921
2922 p = xdr_reserve_space(xdr, 20);
2923 if (!p)
2924 return NULL;
2925 *p++ = htonl(2);
2926 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2927 *p++ = htonl(0); /* bmval1 */
2928
2929 *p++ = htonl(4); /* attribute length */
2930 *p++ = nfserr; /* no htonl */
2931 return p;
2932}
2933
2934static int
2935nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2936 loff_t offset, u64 ino, unsigned int d_type)
2937{
2938 struct readdir_cd *ccd = ccdv;
2939 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2940 struct xdr_stream *xdr = cd->xdr;
2941 int start_offset = xdr->buf->len;
2942 int cookie_offset;
2943 u32 name_and_cookie;
2944 int entry_bytes;
2945 __be32 nfserr = nfserr_toosmall;
2946 __be64 wire_offset;
2947 __be32 *p;
2948
2949 /* In nfsv4, "." and ".." never make it onto the wire.. */
2950 if (name && isdotent(name, namlen)) {
2951 cd->common.err = nfs_ok;
2952 return 0;
2953 }
2954
2955 if (cd->cookie_offset) {
2956 wire_offset = cpu_to_be64(offset);
2957 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
2958 &wire_offset, 8);
2959 }
2960
2961 p = xdr_reserve_space(xdr, 4);
2962 if (!p)
2963 goto fail;
2964 *p++ = xdr_one; /* mark entry present */
2965 cookie_offset = xdr->buf->len;
2966 p = xdr_reserve_space(xdr, 3*4 + namlen);
2967 if (!p)
2968 goto fail;
2969 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2970 p = xdr_encode_array(p, name, namlen); /* name length & name */
2971
2972 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
2973 switch (nfserr) {
2974 case nfs_ok:
2975 break;
2976 case nfserr_resource:
2977 nfserr = nfserr_toosmall;
2978 goto fail;
2979 case nfserr_noent:
2980 xdr_truncate_encode(xdr, start_offset);
2981 goto skip_entry;
2982 default:
2983 /*
2984 * If the client requested the RDATTR_ERROR attribute,
2985 * we stuff the error code into this attribute
2986 * and continue. If this attribute was not requested,
2987 * then in accordance with the spec, we fail the
2988 * entire READDIR operation(!)
2989 */
2990 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2991 goto fail;
2992 p = nfsd4_encode_rdattr_error(xdr, nfserr);
2993 if (p == NULL) {
2994 nfserr = nfserr_toosmall;
2995 goto fail;
2996 }
2997 }
2998 nfserr = nfserr_toosmall;
2999 entry_bytes = xdr->buf->len - start_offset;
3000 if (entry_bytes > cd->rd_maxcount)
3001 goto fail;
3002 cd->rd_maxcount -= entry_bytes;
3003 /*
3004 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", so
3005 * let's always let through the first entry, at least:
3006 */
3007 if (!cd->rd_dircount)
3008 goto fail;
3009 name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8;
3010 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset)
3011 goto fail;
3012 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie);
3013
3014 cd->cookie_offset = cookie_offset;
3015skip_entry:
3016 cd->common.err = nfs_ok;
3017 return 0;
3018fail:
3019 xdr_truncate_encode(xdr, start_offset);
3020 cd->common.err = nfserr;
3021 return -EINVAL;
3022}
3023
3024static __be32
3025nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
3026{
3027 __be32 *p;
3028
3029 p = xdr_reserve_space(xdr, sizeof(stateid_t));
3030 if (!p)
3031 return nfserr_resource;
3032 *p++ = cpu_to_be32(sid->si_generation);
3033 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
3034 sizeof(stateid_opaque_t));
3035 return 0;
3036}
3037
3038static __be32
3039nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
3040{
3041 struct xdr_stream *xdr = &resp->xdr;
3042 __be32 *p;
3043
3044 if (!nfserr) {
3045 p = xdr_reserve_space(xdr, 8);
3046 if (!p)
3047 return nfserr_resource;
3048 *p++ = cpu_to_be32(access->ac_supported);
3049 *p++ = cpu_to_be32(access->ac_resp_access);
3050 }
3051 return nfserr;
3052}
3053
3054static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
3055{
3056 struct xdr_stream *xdr = &resp->xdr;
3057 __be32 *p;
3058
3059 if (!nfserr) {
3060 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
3061 if (!p)
3062 return nfserr_resource;
3063 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
3064 NFS4_MAX_SESSIONID_LEN);
3065 *p++ = cpu_to_be32(bcts->dir);
3066 /* Upshifting from TCP to RDMA is not supported */
3067 *p++ = cpu_to_be32(0);
3068 }
3069 return nfserr;
3070}
3071
3072static __be32
3073nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
3074{
3075 struct xdr_stream *xdr = &resp->xdr;
3076
3077 if (!nfserr)
3078 nfserr = nfsd4_encode_stateid(xdr, &close->cl_stateid);
3079
3080 return nfserr;
3081}
3082
3083
3084static __be32
3085nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
3086{
3087 struct xdr_stream *xdr = &resp->xdr;
3088 __be32 *p;
3089
3090 if (!nfserr) {
3091 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3092 if (!p)
3093 return nfserr_resource;
3094 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
3095 NFS4_VERIFIER_SIZE);
3096 }
3097 return nfserr;
3098}
3099
3100static __be32
3101nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
3102{
3103 struct xdr_stream *xdr = &resp->xdr;
3104 __be32 *p;
3105
3106 if (!nfserr) {
3107 p = xdr_reserve_space(xdr, 20);
3108 if (!p)
3109 return nfserr_resource;
3110 encode_cinfo(p, &create->cr_cinfo);
3111 nfserr = nfsd4_encode_bitmap(xdr, create->cr_bmval[0],
3112 create->cr_bmval[1], create->cr_bmval[2]);
3113 }
3114 return nfserr;
3115}
3116
3117static __be32
3118nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
3119{
3120 struct svc_fh *fhp = getattr->ga_fhp;
3121 struct xdr_stream *xdr = &resp->xdr;
3122
3123 if (nfserr)
3124 return nfserr;
3125
3126 nfserr = nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
3127 getattr->ga_bmval,
3128 resp->rqstp, 0);
3129 return nfserr;
3130}
3131
3132static __be32
3133nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
3134{
3135 struct xdr_stream *xdr = &resp->xdr;
3136 struct svc_fh *fhp = *fhpp;
3137 unsigned int len;
3138 __be32 *p;
3139
3140 if (!nfserr) {
3141 len = fhp->fh_handle.fh_size;
3142 p = xdr_reserve_space(xdr, len + 4);
3143 if (!p)
3144 return nfserr_resource;
3145 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
3146 }
3147 return nfserr;
3148}
3149
3150/*
3151* Including all fields other than the name, a LOCK4denied structure requires
3152* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
3153*/
3154static __be32
3155nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
3156{
3157 struct xdr_netobj *conf = &ld->ld_owner;
3158 __be32 *p;
3159
3160again:
3161 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
3162 if (!p) {
3163 /*
3164 * Don't fail to return the result just because we can't
3165 * return the conflicting open:
3166 */
3167 if (conf->len) {
3168 kfree(conf->data);
3169 conf->len = 0;
3170 conf->data = NULL;
3171 goto again;
3172 }
3173 return nfserr_resource;
3174 }
3175 p = xdr_encode_hyper(p, ld->ld_start);
3176 p = xdr_encode_hyper(p, ld->ld_length);
3177 *p++ = cpu_to_be32(ld->ld_type);
3178 if (conf->len) {
3179 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
3180 p = xdr_encode_opaque(p, conf->data, conf->len);
3181 kfree(conf->data);
3182 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
3183 p = xdr_encode_hyper(p, (u64)0); /* clientid */
3184 *p++ = cpu_to_be32(0); /* length of owner name */
3185 }
3186 return nfserr_denied;
3187}
3188
3189static __be32
3190nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
3191{
3192 struct xdr_stream *xdr = &resp->xdr;
3193
3194 if (!nfserr)
3195 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
3196 else if (nfserr == nfserr_denied)
3197 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
3198
3199 return nfserr;
3200}
3201
3202static __be32
3203nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
3204{
3205 struct xdr_stream *xdr = &resp->xdr;
3206
3207 if (nfserr == nfserr_denied)
3208 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
3209 return nfserr;
3210}
3211
3212static __be32
3213nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
3214{
3215 struct xdr_stream *xdr = &resp->xdr;
3216
3217 if (!nfserr)
3218 nfserr = nfsd4_encode_stateid(xdr, &locku->lu_stateid);
3219
3220 return nfserr;
3221}
3222
3223
3224static __be32
3225nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
3226{
3227 struct xdr_stream *xdr = &resp->xdr;
3228 __be32 *p;
3229
3230 if (!nfserr) {
3231 p = xdr_reserve_space(xdr, 20);
3232 if (!p)
3233 return nfserr_resource;
3234 p = encode_cinfo(p, &link->li_cinfo);
3235 }
3236 return nfserr;
3237}
3238
3239
3240static __be32
3241nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
3242{
3243 struct xdr_stream *xdr = &resp->xdr;
3244 __be32 *p;
3245
3246 if (nfserr)
3247 goto out;
3248
3249 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
3250 if (nfserr)
3251 goto out;
3252 p = xdr_reserve_space(xdr, 24);
3253 if (!p)
3254 return nfserr_resource;
3255 p = encode_cinfo(p, &open->op_cinfo);
3256 *p++ = cpu_to_be32(open->op_rflags);
3257
3258 nfserr = nfsd4_encode_bitmap(xdr, open->op_bmval[0], open->op_bmval[1],
3259 open->op_bmval[2]);
3260 if (nfserr)
3261 goto out;
3262
3263 p = xdr_reserve_space(xdr, 4);
3264 if (!p)
3265 return nfserr_resource;
3266
3267 *p++ = cpu_to_be32(open->op_delegate_type);
3268 switch (open->op_delegate_type) {
3269 case NFS4_OPEN_DELEGATE_NONE:
3270 break;
3271 case NFS4_OPEN_DELEGATE_READ:
3272 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3273 if (nfserr)
3274 return nfserr;
3275 p = xdr_reserve_space(xdr, 20);
3276 if (!p)
3277 return nfserr_resource;
3278 *p++ = cpu_to_be32(open->op_recall);
3279
3280 /*
3281 * TODO: ACE's in delegations
3282 */
3283 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3284 *p++ = cpu_to_be32(0);
3285 *p++ = cpu_to_be32(0);
3286 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
3287 break;
3288 case NFS4_OPEN_DELEGATE_WRITE:
3289 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3290 if (nfserr)
3291 return nfserr;
3292 p = xdr_reserve_space(xdr, 32);
3293 if (!p)
3294 return nfserr_resource;
3295 *p++ = cpu_to_be32(0);
3296
3297 /*
3298 * TODO: space_limit's in delegations
3299 */
3300 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
3301 *p++ = cpu_to_be32(~(u32)0);
3302 *p++ = cpu_to_be32(~(u32)0);
3303
3304 /*
3305 * TODO: ACE's in delegations
3306 */
3307 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3308 *p++ = cpu_to_be32(0);
3309 *p++ = cpu_to_be32(0);
3310 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
3311 break;
3312 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3313 switch (open->op_why_no_deleg) {
3314 case WND4_CONTENTION:
3315 case WND4_RESOURCE:
3316 p = xdr_reserve_space(xdr, 8);
3317 if (!p)
3318 return nfserr_resource;
3319 *p++ = cpu_to_be32(open->op_why_no_deleg);
3320 /* deleg signaling not supported yet: */
3321 *p++ = cpu_to_be32(0);
3322 break;
3323 default:
3324 p = xdr_reserve_space(xdr, 4);
3325 if (!p)
3326 return nfserr_resource;
3327 *p++ = cpu_to_be32(open->op_why_no_deleg);
3328 }
3329 break;
3330 default:
3331 BUG();
3332 }
3333 /* XXX save filehandle here */
3334out:
3335 return nfserr;
3336}
3337
3338static __be32
3339nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
3340{
3341 struct xdr_stream *xdr = &resp->xdr;
3342
3343 if (!nfserr)
3344 nfserr = nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
3345
3346 return nfserr;
3347}
3348
3349static __be32
3350nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
3351{
3352 struct xdr_stream *xdr = &resp->xdr;
3353
3354 if (!nfserr)
3355 nfserr = nfsd4_encode_stateid(xdr, &od->od_stateid);
3356
3357 return nfserr;
3358}
3359
3360static __be32 nfsd4_encode_splice_read(
3361 struct nfsd4_compoundres *resp,
3362 struct nfsd4_read *read,
3363 struct file *file, unsigned long maxcount)
3364{
3365 struct xdr_stream *xdr = &resp->xdr;
3366 struct xdr_buf *buf = xdr->buf;
3367 u32 eof;
3368 long len;
3369 int space_left;
3370 __be32 nfserr;
3371 __be32 *p = xdr->p - 2;
3372
3373 /* Make sure there will be room for padding if needed */
3374 if (xdr->end - xdr->p < 1)
3375 return nfserr_resource;
3376
3377 len = maxcount;
3378 nfserr = nfsd_splice_read(read->rd_rqstp, file,
3379 read->rd_offset, &maxcount);
3380 if (nfserr) {
3381 /*
3382 * nfsd_splice_actor may have already messed with the
3383 * page length; reset it so as not to confuse
3384 * xdr_truncate_encode:
3385 */
3386 buf->page_len = 0;
3387 return nfserr;
3388 }
3389
3390 eof = nfsd_eof_on_read(len, maxcount, read->rd_offset,
3391 d_inode(read->rd_fhp->fh_dentry)->i_size);
3392
3393 *(p++) = htonl(eof);
3394 *(p++) = htonl(maxcount);
3395
3396 buf->page_len = maxcount;
3397 buf->len += maxcount;
3398 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1)
3399 / PAGE_SIZE;
3400
3401 /* Use rest of head for padding and remaining ops: */
3402 buf->tail[0].iov_base = xdr->p;
3403 buf->tail[0].iov_len = 0;
3404 xdr->iov = buf->tail;
3405 if (maxcount&3) {
3406 int pad = 4 - (maxcount&3);
3407
3408 *(xdr->p++) = 0;
3409
3410 buf->tail[0].iov_base += maxcount&3;
3411 buf->tail[0].iov_len = pad;
3412 buf->len += pad;
3413 }
3414
3415 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
3416 buf->buflen - buf->len);
3417 buf->buflen = buf->len + space_left;
3418 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3419
3420 return 0;
3421}
3422
3423static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3424 struct nfsd4_read *read,
3425 struct file *file, unsigned long maxcount)
3426{
3427 struct xdr_stream *xdr = &resp->xdr;
3428 u32 eof;
3429 int v;
3430 int starting_len = xdr->buf->len - 8;
3431 long len;
3432 int thislen;
3433 __be32 nfserr;
3434 __be32 tmp;
3435 __be32 *p;
3436 u32 zzz = 0;
3437 int pad;
3438
3439 len = maxcount;
3440 v = 0;
3441
3442 thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p));
3443 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3444 WARN_ON_ONCE(!p);
3445 resp->rqstp->rq_vec[v].iov_base = p;
3446 resp->rqstp->rq_vec[v].iov_len = thislen;
3447 v++;
3448 len -= thislen;
3449
3450 while (len) {
3451 thislen = min_t(long, len, PAGE_SIZE);
3452 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3453 WARN_ON_ONCE(!p);
3454 resp->rqstp->rq_vec[v].iov_base = p;
3455 resp->rqstp->rq_vec[v].iov_len = thislen;
3456 v++;
3457 len -= thislen;
3458 }
3459 read->rd_vlen = v;
3460
3461 len = maxcount;
3462 nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec,
3463 read->rd_vlen, &maxcount);
3464 if (nfserr)
3465 return nfserr;
3466 xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3));
3467
3468 eof = nfsd_eof_on_read(len, maxcount, read->rd_offset,
3469 d_inode(read->rd_fhp->fh_dentry)->i_size);
3470
3471 tmp = htonl(eof);
3472 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
3473 tmp = htonl(maxcount);
3474 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3475
3476 pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
3477 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
3478 &zzz, pad);
3479 return 0;
3480
3481}
3482
3483static __be32
3484nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3485 struct nfsd4_read *read)
3486{
3487 unsigned long maxcount;
3488 struct xdr_stream *xdr = &resp->xdr;
3489 struct file *file = read->rd_filp;
3490 int starting_len = xdr->buf->len;
3491 struct raparms *ra = NULL;
3492 __be32 *p;
3493
3494 if (nfserr)
3495 goto out;
3496
3497 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
3498 if (!p) {
3499 WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags));
3500 nfserr = nfserr_resource;
3501 goto out;
3502 }
3503 if (resp->xdr.buf->page_len &&
3504 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) {
3505 WARN_ON_ONCE(1);
3506 nfserr = nfserr_resource;
3507 goto out;
3508 }
3509 xdr_commit_encode(xdr);
3510
3511 maxcount = svc_max_payload(resp->rqstp);
3512 maxcount = min_t(unsigned long, maxcount,
3513 (xdr->buf->buflen - xdr->buf->len));
3514 maxcount = min_t(unsigned long, maxcount, read->rd_length);
3515
3516 if (read->rd_tmp_file)
3517 ra = nfsd_init_raparms(file);
3518
3519 if (file->f_op->splice_read &&
3520 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags))
3521 nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount);
3522 else
3523 nfserr = nfsd4_encode_readv(resp, read, file, maxcount);
3524
3525 if (ra)
3526 nfsd_put_raparams(file, ra);
3527
3528 if (nfserr)
3529 xdr_truncate_encode(xdr, starting_len);
3530
3531out:
3532 if (file)
3533 fput(file);
3534 return nfserr;
3535}
3536
3537static __be32
3538nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
3539{
3540 int maxcount;
3541 __be32 wire_count;
3542 int zero = 0;
3543 struct xdr_stream *xdr = &resp->xdr;
3544 int length_offset = xdr->buf->len;
3545 __be32 *p;
3546
3547 if (nfserr)
3548 return nfserr;
3549
3550 p = xdr_reserve_space(xdr, 4);
3551 if (!p)
3552 return nfserr_resource;
3553 maxcount = PAGE_SIZE;
3554
3555 p = xdr_reserve_space(xdr, maxcount);
3556 if (!p)
3557 return nfserr_resource;
3558 /*
3559 * XXX: By default, the ->readlink() VFS op will truncate symlinks
3560 * if they would overflow the buffer. Is this kosher in NFSv4? If
3561 * not, one easy fix is: if ->readlink() precisely fills the buffer,
3562 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
3563 */
3564 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
3565 (char *)p, &maxcount);
3566 if (nfserr == nfserr_isdir)
3567 nfserr = nfserr_inval;
3568 if (nfserr) {
3569 xdr_truncate_encode(xdr, length_offset);
3570 return nfserr;
3571 }
3572
3573 wire_count = htonl(maxcount);
3574 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
3575 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4));
3576 if (maxcount & 3)
3577 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
3578 &zero, 4 - (maxcount&3));
3579 return 0;
3580}
3581
3582static __be32
3583nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
3584{
3585 int maxcount;
3586 int bytes_left;
3587 loff_t offset;
3588 __be64 wire_offset;
3589 struct xdr_stream *xdr = &resp->xdr;
3590 int starting_len = xdr->buf->len;
3591 __be32 *p;
3592
3593 if (nfserr)
3594 return nfserr;
3595
3596 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3597 if (!p)
3598 return nfserr_resource;
3599
3600 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
3601 *p++ = cpu_to_be32(0);
3602 *p++ = cpu_to_be32(0);
3603 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
3604 - (char *)resp->xdr.buf->head[0].iov_base;
3605
3606 /*
3607 * Number of bytes left for directory entries allowing for the
3608 * final 8 bytes of the readdir and a following failed op:
3609 */
3610 bytes_left = xdr->buf->buflen - xdr->buf->len
3611 - COMPOUND_ERR_SLACK_SPACE - 8;
3612 if (bytes_left < 0) {
3613 nfserr = nfserr_resource;
3614 goto err_no_verf;
3615 }
3616 maxcount = min_t(u32, readdir->rd_maxcount, INT_MAX);
3617 /*
3618 * Note the rfc defines rd_maxcount as the size of the
3619 * READDIR4resok structure, which includes the verifier above
3620 * and the 8 bytes encoded at the end of this function:
3621 */
3622 if (maxcount < 16) {
3623 nfserr = nfserr_toosmall;
3624 goto err_no_verf;
3625 }
3626 maxcount = min_t(int, maxcount-16, bytes_left);
3627
3628 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */
3629 if (!readdir->rd_dircount)
3630 readdir->rd_dircount = INT_MAX;
3631
3632 readdir->xdr = xdr;
3633 readdir->rd_maxcount = maxcount;
3634 readdir->common.err = 0;
3635 readdir->cookie_offset = 0;
3636
3637 offset = readdir->rd_cookie;
3638 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3639 &offset,
3640 &readdir->common, nfsd4_encode_dirent);
3641 if (nfserr == nfs_ok &&
3642 readdir->common.err == nfserr_toosmall &&
3643 xdr->buf->len == starting_len + 8) {
3644 /* nothing encoded; which limit did we hit?: */
3645 if (maxcount - 16 < bytes_left)
3646 /* It was the fault of rd_maxcount: */
3647 nfserr = nfserr_toosmall;
3648 else
3649 /* We ran out of buffer space: */
3650 nfserr = nfserr_resource;
3651 }
3652 if (nfserr)
3653 goto err_no_verf;
3654
3655 if (readdir->cookie_offset) {
3656 wire_offset = cpu_to_be64(offset);
3657 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
3658 &wire_offset, 8);
3659 }
3660
3661 p = xdr_reserve_space(xdr, 8);
3662 if (!p) {
3663 WARN_ON_ONCE(1);
3664 goto err_no_verf;
3665 }
3666 *p++ = 0; /* no more entries */
3667 *p++ = htonl(readdir->common.err == nfserr_eof);
3668
3669 return 0;
3670err_no_verf:
3671 xdr_truncate_encode(xdr, starting_len);
3672 return nfserr;
3673}
3674
3675static __be32
3676nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
3677{
3678 struct xdr_stream *xdr = &resp->xdr;
3679 __be32 *p;
3680
3681 if (!nfserr) {
3682 p = xdr_reserve_space(xdr, 20);
3683 if (!p)
3684 return nfserr_resource;
3685 p = encode_cinfo(p, &remove->rm_cinfo);
3686 }
3687 return nfserr;
3688}
3689
3690static __be32
3691nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
3692{
3693 struct xdr_stream *xdr = &resp->xdr;
3694 __be32 *p;
3695
3696 if (!nfserr) {
3697 p = xdr_reserve_space(xdr, 40);
3698 if (!p)
3699 return nfserr_resource;
3700 p = encode_cinfo(p, &rename->rn_sinfo);
3701 p = encode_cinfo(p, &rename->rn_tinfo);
3702 }
3703 return nfserr;
3704}
3705
3706static __be32
3707nfsd4_do_encode_secinfo(struct xdr_stream *xdr,
3708 __be32 nfserr, struct svc_export *exp)
3709{
3710 u32 i, nflavs, supported;
3711 struct exp_flavor_info *flavs;
3712 struct exp_flavor_info def_flavs[2];
3713 __be32 *p, *flavorsp;
3714 static bool report = true;
3715
3716 if (nfserr)
3717 goto out;
3718 nfserr = nfserr_resource;
3719 if (exp->ex_nflavors) {
3720 flavs = exp->ex_flavors;
3721 nflavs = exp->ex_nflavors;
3722 } else { /* Handling of some defaults in absence of real secinfo: */
3723 flavs = def_flavs;
3724 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3725 nflavs = 2;
3726 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3727 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3728 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3729 nflavs = 1;
3730 flavs[0].pseudoflavor
3731 = svcauth_gss_flavor(exp->ex_client);
3732 } else {
3733 nflavs = 1;
3734 flavs[0].pseudoflavor
3735 = exp->ex_client->flavour->flavour;
3736 }
3737 }
3738
3739 supported = 0;
3740 p = xdr_reserve_space(xdr, 4);
3741 if (!p)
3742 goto out;
3743 flavorsp = p++; /* to be backfilled later */
3744
3745 for (i = 0; i < nflavs; i++) {
3746 rpc_authflavor_t pf = flavs[i].pseudoflavor;
3747 struct rpcsec_gss_info info;
3748
3749 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3750 supported++;
3751 p = xdr_reserve_space(xdr, 4 + 4 +
3752 XDR_LEN(info.oid.len) + 4 + 4);
3753 if (!p)
3754 goto out;
3755 *p++ = cpu_to_be32(RPC_AUTH_GSS);
3756 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
3757 *p++ = cpu_to_be32(info.qop);
3758 *p++ = cpu_to_be32(info.service);
3759 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3760 supported++;
3761 p = xdr_reserve_space(xdr, 4);
3762 if (!p)
3763 goto out;
3764 *p++ = cpu_to_be32(pf);
3765 } else {
3766 if (report)
3767 pr_warn("NFS: SECINFO: security flavor %u "
3768 "is not supported\n", pf);
3769 }
3770 }
3771
3772 if (nflavs != supported)
3773 report = false;
3774 *flavorsp = htonl(supported);
3775 nfserr = 0;
3776out:
3777 if (exp)
3778 exp_put(exp);
3779 return nfserr;
3780}
3781
3782static __be32
3783nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3784 struct nfsd4_secinfo *secinfo)
3785{
3786 struct xdr_stream *xdr = &resp->xdr;
3787
3788 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->si_exp);
3789}
3790
3791static __be32
3792nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3793 struct nfsd4_secinfo_no_name *secinfo)
3794{
3795 struct xdr_stream *xdr = &resp->xdr;
3796
3797 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->sin_exp);
3798}
3799
3800/*
3801 * The SETATTR encode routine is special -- it always encodes a bitmap,
3802 * regardless of the error status.
3803 */
3804static __be32
3805nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
3806{
3807 struct xdr_stream *xdr = &resp->xdr;
3808 __be32 *p;
3809
3810 p = xdr_reserve_space(xdr, 16);
3811 if (!p)
3812 return nfserr_resource;
3813 if (nfserr) {
3814 *p++ = cpu_to_be32(3);
3815 *p++ = cpu_to_be32(0);
3816 *p++ = cpu_to_be32(0);
3817 *p++ = cpu_to_be32(0);
3818 }
3819 else {
3820 *p++ = cpu_to_be32(3);
3821 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
3822 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
3823 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
3824 }
3825 return nfserr;
3826}
3827
3828static __be32
3829nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
3830{
3831 struct xdr_stream *xdr = &resp->xdr;
3832 __be32 *p;
3833
3834 if (!nfserr) {
3835 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
3836 if (!p)
3837 return nfserr_resource;
3838 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
3839 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
3840 NFS4_VERIFIER_SIZE);
3841 }
3842 else if (nfserr == nfserr_clid_inuse) {
3843 p = xdr_reserve_space(xdr, 8);
3844 if (!p)
3845 return nfserr_resource;
3846 *p++ = cpu_to_be32(0);
3847 *p++ = cpu_to_be32(0);
3848 }
3849 return nfserr;
3850}
3851
3852static __be32
3853nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
3854{
3855 struct xdr_stream *xdr = &resp->xdr;
3856 __be32 *p;
3857
3858 if (!nfserr) {
3859 p = xdr_reserve_space(xdr, 16);
3860 if (!p)
3861 return nfserr_resource;
3862 *p++ = cpu_to_be32(write->wr_bytes_written);
3863 *p++ = cpu_to_be32(write->wr_how_written);
3864 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
3865 NFS4_VERIFIER_SIZE);
3866 }
3867 return nfserr;
3868}
3869
3870static const u32 nfs4_minimal_spo_must_enforce[2] = {
3871 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
3872 1 << (OP_EXCHANGE_ID - 32) |
3873 1 << (OP_CREATE_SESSION - 32) |
3874 1 << (OP_DESTROY_SESSION - 32) |
3875 1 << (OP_DESTROY_CLIENTID - 32)
3876};
3877
3878static __be32
3879nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
3880 struct nfsd4_exchange_id *exid)
3881{
3882 struct xdr_stream *xdr = &resp->xdr;
3883 __be32 *p;
3884 char *major_id;
3885 char *server_scope;
3886 int major_id_sz;
3887 int server_scope_sz;
3888 uint64_t minor_id = 0;
3889
3890 if (nfserr)
3891 return nfserr;
3892
3893 major_id = utsname()->nodename;
3894 major_id_sz = strlen(major_id);
3895 server_scope = utsname()->nodename;
3896 server_scope_sz = strlen(server_scope);
3897
3898 p = xdr_reserve_space(xdr,
3899 8 /* eir_clientid */ +
3900 4 /* eir_sequenceid */ +
3901 4 /* eir_flags */ +
3902 4 /* spr_how */);
3903 if (!p)
3904 return nfserr_resource;
3905
3906 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
3907 *p++ = cpu_to_be32(exid->seqid);
3908 *p++ = cpu_to_be32(exid->flags);
3909
3910 *p++ = cpu_to_be32(exid->spa_how);
3911
3912 switch (exid->spa_how) {
3913 case SP4_NONE:
3914 break;
3915 case SP4_MACH_CRED:
3916 /* spo_must_enforce, spo_must_allow */
3917 p = xdr_reserve_space(xdr, 16);
3918 if (!p)
3919 return nfserr_resource;
3920
3921 /* spo_must_enforce bitmap: */
3922 *p++ = cpu_to_be32(2);
3923 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[0]);
3924 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[1]);
3925 /* empty spo_must_allow bitmap: */
3926 *p++ = cpu_to_be32(0);
3927
3928 break;
3929 default:
3930 WARN_ON_ONCE(1);
3931 }
3932
3933 p = xdr_reserve_space(xdr,
3934 8 /* so_minor_id */ +
3935 4 /* so_major_id.len */ +
3936 (XDR_QUADLEN(major_id_sz) * 4) +
3937 4 /* eir_server_scope.len */ +
3938 (XDR_QUADLEN(server_scope_sz) * 4) +
3939 4 /* eir_server_impl_id.count (0) */);
3940 if (!p)
3941 return nfserr_resource;
3942
3943 /* The server_owner struct */
3944 p = xdr_encode_hyper(p, minor_id); /* Minor id */
3945 /* major id */
3946 p = xdr_encode_opaque(p, major_id, major_id_sz);
3947
3948 /* Server scope */
3949 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
3950
3951 /* Implementation id */
3952 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */
3953 return 0;
3954}
3955
3956static __be32
3957nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
3958 struct nfsd4_create_session *sess)
3959{
3960 struct xdr_stream *xdr = &resp->xdr;
3961 __be32 *p;
3962
3963 if (nfserr)
3964 return nfserr;
3965
3966 p = xdr_reserve_space(xdr, 24);
3967 if (!p)
3968 return nfserr_resource;
3969 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
3970 NFS4_MAX_SESSIONID_LEN);
3971 *p++ = cpu_to_be32(sess->seqid);
3972 *p++ = cpu_to_be32(sess->flags);
3973
3974 p = xdr_reserve_space(xdr, 28);
3975 if (!p)
3976 return nfserr_resource;
3977 *p++ = cpu_to_be32(0); /* headerpadsz */
3978 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
3979 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
3980 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
3981 *p++ = cpu_to_be32(sess->fore_channel.maxops);
3982 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
3983 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
3984
3985 if (sess->fore_channel.nr_rdma_attrs) {
3986 p = xdr_reserve_space(xdr, 4);
3987 if (!p)
3988 return nfserr_resource;
3989 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
3990 }
3991
3992 p = xdr_reserve_space(xdr, 28);
3993 if (!p)
3994 return nfserr_resource;
3995 *p++ = cpu_to_be32(0); /* headerpadsz */
3996 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
3997 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
3998 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
3999 *p++ = cpu_to_be32(sess->back_channel.maxops);
4000 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
4001 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
4002
4003 if (sess->back_channel.nr_rdma_attrs) {
4004 p = xdr_reserve_space(xdr, 4);
4005 if (!p)
4006 return nfserr_resource;
4007 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
4008 }
4009 return 0;
4010}
4011
4012static __be32
4013nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
4014 struct nfsd4_sequence *seq)
4015{
4016 struct xdr_stream *xdr = &resp->xdr;
4017 __be32 *p;
4018
4019 if (nfserr)
4020 return nfserr;
4021
4022 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
4023 if (!p)
4024 return nfserr_resource;
4025 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
4026 NFS4_MAX_SESSIONID_LEN);
4027 *p++ = cpu_to_be32(seq->seqid);
4028 *p++ = cpu_to_be32(seq->slotid);
4029 /* Note slotid's are numbered from zero: */
4030 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
4031 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
4032 *p++ = cpu_to_be32(seq->status_flags);
4033
4034 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
4035 return 0;
4036}
4037
4038static __be32
4039nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
4040 struct nfsd4_test_stateid *test_stateid)
4041{
4042 struct xdr_stream *xdr = &resp->xdr;
4043 struct nfsd4_test_stateid_id *stateid, *next;
4044 __be32 *p;
4045
4046 if (nfserr)
4047 return nfserr;
4048
4049 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
4050 if (!p)
4051 return nfserr_resource;
4052 *p++ = htonl(test_stateid->ts_num_ids);
4053
4054 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
4055 *p++ = stateid->ts_id_status;
4056 }
4057
4058 return nfserr;
4059}
4060
4061#ifdef CONFIG_NFSD_PNFS
4062static __be32
4063nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
4064 struct nfsd4_getdeviceinfo *gdev)
4065{
4066 struct xdr_stream *xdr = &resp->xdr;
4067 const struct nfsd4_layout_ops *ops =
4068 nfsd4_layout_ops[gdev->gd_layout_type];
4069 u32 starting_len = xdr->buf->len, needed_len;
4070 __be32 *p;
4071
4072 dprintk("%s: err %d\n", __func__, nfserr);
4073 if (nfserr)
4074 goto out;
4075
4076 nfserr = nfserr_resource;
4077 p = xdr_reserve_space(xdr, 4);
4078 if (!p)
4079 goto out;
4080
4081 *p++ = cpu_to_be32(gdev->gd_layout_type);
4082
4083 /* If maxcount is 0 then just update notifications */
4084 if (gdev->gd_maxcount != 0) {
4085 nfserr = ops->encode_getdeviceinfo(xdr, gdev);
4086 if (nfserr) {
4087 /*
4088 * We don't bother to burden the layout drivers with
4089 * enforcing gd_maxcount, just tell the client to
4090 * come back with a bigger buffer if it's not enough.
4091 */
4092 if (xdr->buf->len + 4 > gdev->gd_maxcount)
4093 goto toosmall;
4094 goto out;
4095 }
4096 }
4097
4098 nfserr = nfserr_resource;
4099 if (gdev->gd_notify_types) {
4100 p = xdr_reserve_space(xdr, 4 + 4);
4101 if (!p)
4102 goto out;
4103 *p++ = cpu_to_be32(1); /* bitmap length */
4104 *p++ = cpu_to_be32(gdev->gd_notify_types);
4105 } else {
4106 p = xdr_reserve_space(xdr, 4);
4107 if (!p)
4108 goto out;
4109 *p++ = 0;
4110 }
4111
4112 nfserr = 0;
4113out:
4114 kfree(gdev->gd_device);
4115 dprintk("%s: done: %d\n", __func__, be32_to_cpu(nfserr));
4116 return nfserr;
4117
4118toosmall:
4119 dprintk("%s: maxcount too small\n", __func__);
4120 needed_len = xdr->buf->len + 4 /* notifications */;
4121 xdr_truncate_encode(xdr, starting_len);
4122 p = xdr_reserve_space(xdr, 4);
4123 if (!p) {
4124 nfserr = nfserr_resource;
4125 } else {
4126 *p++ = cpu_to_be32(needed_len);
4127 nfserr = nfserr_toosmall;
4128 }
4129 goto out;
4130}
4131
4132static __be32
4133nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr,
4134 struct nfsd4_layoutget *lgp)
4135{
4136 struct xdr_stream *xdr = &resp->xdr;
4137 const struct nfsd4_layout_ops *ops =
4138 nfsd4_layout_ops[lgp->lg_layout_type];
4139 __be32 *p;
4140
4141 dprintk("%s: err %d\n", __func__, nfserr);
4142 if (nfserr)
4143 goto out;
4144
4145 nfserr = nfserr_resource;
4146 p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t));
4147 if (!p)
4148 goto out;
4149
4150 *p++ = cpu_to_be32(1); /* we always set return-on-close */
4151 *p++ = cpu_to_be32(lgp->lg_sid.si_generation);
4152 p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque,
4153 sizeof(stateid_opaque_t));
4154
4155 *p++ = cpu_to_be32(1); /* we always return a single layout */
4156 p = xdr_encode_hyper(p, lgp->lg_seg.offset);
4157 p = xdr_encode_hyper(p, lgp->lg_seg.length);
4158 *p++ = cpu_to_be32(lgp->lg_seg.iomode);
4159 *p++ = cpu_to_be32(lgp->lg_layout_type);
4160
4161 nfserr = ops->encode_layoutget(xdr, lgp);
4162out:
4163 kfree(lgp->lg_content);
4164 return nfserr;
4165}
4166
4167static __be32
4168nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr,
4169 struct nfsd4_layoutcommit *lcp)
4170{
4171 struct xdr_stream *xdr = &resp->xdr;
4172 __be32 *p;
4173
4174 if (nfserr)
4175 return nfserr;
4176
4177 p = xdr_reserve_space(xdr, 4);
4178 if (!p)
4179 return nfserr_resource;
4180 *p++ = cpu_to_be32(lcp->lc_size_chg);
4181 if (lcp->lc_size_chg) {
4182 p = xdr_reserve_space(xdr, 8);
4183 if (!p)
4184 return nfserr_resource;
4185 p = xdr_encode_hyper(p, lcp->lc_newsize);
4186 }
4187
4188 return nfs_ok;
4189}
4190
4191static __be32
4192nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr,
4193 struct nfsd4_layoutreturn *lrp)
4194{
4195 struct xdr_stream *xdr = &resp->xdr;
4196 __be32 *p;
4197
4198 if (nfserr)
4199 return nfserr;
4200
4201 p = xdr_reserve_space(xdr, 4);
4202 if (!p)
4203 return nfserr_resource;
4204 *p++ = cpu_to_be32(lrp->lrs_present);
4205 if (lrp->lrs_present)
4206 return nfsd4_encode_stateid(xdr, &lrp->lr_sid);
4207 return nfs_ok;
4208}
4209#endif /* CONFIG_NFSD_PNFS */
4210
4211static __be32
4212nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
4213 struct nfsd4_seek *seek)
4214{
4215 __be32 *p;
4216
4217 if (nfserr)
4218 return nfserr;
4219
4220 p = xdr_reserve_space(&resp->xdr, 4 + 8);
4221 *p++ = cpu_to_be32(seek->seek_eof);
4222 p = xdr_encode_hyper(p, seek->seek_pos);
4223
4224 return nfserr;
4225}
4226
4227static __be32
4228nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
4229{
4230 return nfserr;
4231}
4232
4233typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
4234
4235/*
4236 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
4237 * since we don't need to filter out obsolete ops as this is
4238 * done in the decoding phase.
4239 */
4240static nfsd4_enc nfsd4_enc_ops[] = {
4241 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
4242 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
4243 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
4244 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
4245 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
4246 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
4247 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
4248 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
4249 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
4250 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
4251 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
4252 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
4253 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
4254 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
4255 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4256 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
4257 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
4258 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
4259 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
4260 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
4261 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
4262 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
4263 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
4264 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
4265 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
4266 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
4267 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
4268 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
4269 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
4270 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
4271 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
4272 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
4273 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
4274 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
4275 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4276 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
4277 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
4278
4279 /* NFSv4.1 operations */
4280 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
4281 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
4282 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
4283 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
4284 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
4285 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
4286 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
4287#ifdef CONFIG_NFSD_PNFS
4288 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo,
4289 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4290 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit,
4291 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget,
4292 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn,
4293#else
4294 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
4295 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4296 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
4297 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
4298 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
4299#endif
4300 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
4301 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
4302 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
4303 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
4304 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
4305 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
4306 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
4307
4308 /* NFSv4.2 operations */
4309 [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
4310 [OP_COPY] = (nfsd4_enc)nfsd4_encode_noop,
4311 [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_noop,
4312 [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
4313 [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop,
4314 [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop,
4315 [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop,
4316 [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop,
4317 [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_noop,
4318 [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_noop,
4319 [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek,
4320 [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop,
4321 [OP_CLONE] = (nfsd4_enc)nfsd4_encode_noop,
4322};
4323
4324/*
4325 * Calculate whether we still have space to encode repsize bytes.
4326 * There are two considerations:
4327 * - For NFS versions >=4.1, the size of the reply must stay within
4328 * session limits
4329 * - For all NFS versions, we must stay within limited preallocated
4330 * buffer space.
4331 *
4332 * This is called before the operation is processed, so can only provide
4333 * an upper estimate. For some nonidempotent operations (such as
4334 * getattr), it's not necessarily a problem if that estimate is wrong,
4335 * as we can fail it after processing without significant side effects.
4336 */
4337__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
4338{
4339 struct xdr_buf *buf = &resp->rqstp->rq_res;
4340 struct nfsd4_slot *slot = resp->cstate.slot;
4341
4342 if (buf->len + respsize <= buf->buflen)
4343 return nfs_ok;
4344 if (!nfsd4_has_session(&resp->cstate))
4345 return nfserr_resource;
4346 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
4347 WARN_ON_ONCE(1);
4348 return nfserr_rep_too_big_to_cache;
4349 }
4350 return nfserr_rep_too_big;
4351}
4352
4353void
4354nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
4355{
4356 struct xdr_stream *xdr = &resp->xdr;
4357 struct nfs4_stateowner *so = resp->cstate.replay_owner;
4358 struct svc_rqst *rqstp = resp->rqstp;
4359 int post_err_offset;
4360 nfsd4_enc encoder;
4361 __be32 *p;
4362
4363 p = xdr_reserve_space(xdr, 8);
4364 if (!p) {
4365 WARN_ON_ONCE(1);
4366 return;
4367 }
4368 *p++ = cpu_to_be32(op->opnum);
4369 post_err_offset = xdr->buf->len;
4370
4371 if (op->opnum == OP_ILLEGAL)
4372 goto status;
4373 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
4374 !nfsd4_enc_ops[op->opnum]);
4375 encoder = nfsd4_enc_ops[op->opnum];
4376 op->status = encoder(resp, op->status, &op->u);
4377 xdr_commit_encode(xdr);
4378
4379 /* nfsd4_check_resp_size guarantees enough room for error status */
4380 if (!op->status) {
4381 int space_needed = 0;
4382 if (!nfsd4_last_compound_op(rqstp))
4383 space_needed = COMPOUND_ERR_SLACK_SPACE;
4384 op->status = nfsd4_check_resp_size(resp, space_needed);
4385 }
4386 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
4387 struct nfsd4_slot *slot = resp->cstate.slot;
4388
4389 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
4390 op->status = nfserr_rep_too_big_to_cache;
4391 else
4392 op->status = nfserr_rep_too_big;
4393 }
4394 if (op->status == nfserr_resource ||
4395 op->status == nfserr_rep_too_big ||
4396 op->status == nfserr_rep_too_big_to_cache) {
4397 /*
4398 * The operation may have already been encoded or
4399 * partially encoded. No op returns anything additional
4400 * in the case of one of these three errors, so we can
4401 * just truncate back to after the status. But it's a
4402 * bug if we had to do this on a non-idempotent op:
4403 */
4404 warn_on_nonidempotent_op(op);
4405 xdr_truncate_encode(xdr, post_err_offset);
4406 }
4407 if (so) {
4408 int len = xdr->buf->len - post_err_offset;
4409
4410 so->so_replay.rp_status = op->status;
4411 so->so_replay.rp_buflen = len;
4412 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
4413 so->so_replay.rp_buf, len);
4414 }
4415status:
4416 /* Note that op->status is already in network byte order: */
4417 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
4418}
4419
4420/*
4421 * Encode the reply stored in the stateowner reply cache
4422 *
4423 * XDR note: do not encode rp->rp_buflen: the buffer contains the
4424 * previously sent already encoded operation.
4425 */
4426void
4427nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
4428{
4429 __be32 *p;
4430 struct nfs4_replay *rp = op->replay;
4431
4432 BUG_ON(!rp);
4433
4434 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
4435 if (!p) {
4436 WARN_ON_ONCE(1);
4437 return;
4438 }
4439 *p++ = cpu_to_be32(op->opnum);
4440 *p++ = rp->rp_status; /* already xdr'ed */
4441
4442 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
4443}
4444
4445int
4446nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
4447{
4448 return xdr_ressize_check(rqstp, p);
4449}
4450
4451int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
4452{
4453 struct svc_rqst *rqstp = rq;
4454 struct nfsd4_compoundargs *args = rqstp->rq_argp;
4455
4456 if (args->ops != args->iops) {
4457 kfree(args->ops);
4458 args->ops = args->iops;
4459 }
4460 kfree(args->tmpp);
4461 args->tmpp = NULL;
4462 while (args->to_free) {
4463 struct svcxdr_tmpbuf *tb = args->to_free;
4464 args->to_free = tb->next;
4465 kfree(tb);
4466 }
4467 return 1;
4468}
4469
4470int
4471nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
4472{
4473 if (rqstp->rq_arg.head[0].iov_len % 4) {
4474 /* client is nuts */
4475 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
4476 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
4477 return 0;
4478 }
4479 args->p = p;
4480 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
4481 args->pagelist = rqstp->rq_arg.pages;
4482 args->pagelen = rqstp->rq_arg.page_len;
4483 args->tmpp = NULL;
4484 args->to_free = NULL;
4485 args->ops = args->iops;
4486 args->rqstp = rqstp;
4487
4488 return !nfsd4_decode_compound(args);
4489}
4490
4491int
4492nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
4493{
4494 /*
4495 * All that remains is to write the tag and operation count...
4496 */
4497 struct xdr_buf *buf = resp->xdr.buf;
4498
4499 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
4500 buf->tail[0].iov_len);
4501
4502 rqstp->rq_next_page = resp->xdr.page_ptr + 1;
4503
4504 p = resp->tagp;
4505 *p++ = htonl(resp->taglen);
4506 memcpy(p, resp->tag, resp->taglen);
4507 p += XDR_QUADLEN(resp->taglen);
4508 *p++ = htonl(resp->opcnt);
4509
4510 nfsd4_sequence_done(resp);
4511 return 1;
4512}
4513
4514/*
4515 * Local variables:
4516 * c-basic-offset: 8
4517 * End:
4518 */
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 * TODO: Neil Brown made the following observation: We currently
36 * initially reserve NFSD_BUFSIZE space on the transmit queue and
37 * never release any of that until the request is complete.
38 * It would be good to calculate a new maximum response size while
39 * decoding the COMPOUND, and call svc_reserve with this number
40 * at the end of nfs4svc_decode_compoundargs.
41 */
42
43#include <linux/slab.h>
44#include <linux/namei.h>
45#include <linux/statfs.h>
46#include <linux/utsname.h>
47#include <linux/pagemap.h>
48#include <linux/sunrpc/svcauth_gss.h>
49
50#include "idmap.h"
51#include "acl.h"
52#include "xdr4.h"
53#include "vfs.h"
54#include "state.h"
55#include "cache.h"
56
57#define NFSDDBG_FACILITY NFSDDBG_XDR
58
59/*
60 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
61 * directory in order to indicate to the client that a filesystem boundary is present
62 * We use a fixed fsid for a referral
63 */
64#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
65#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
66
67static __be32
68check_filename(char *str, int len, __be32 err)
69{
70 int i;
71
72 if (len == 0)
73 return nfserr_inval;
74 if (isdotent(str, len))
75 return err;
76 for (i = 0; i < len; i++)
77 if (str[i] == '/')
78 return err;
79 return 0;
80}
81
82#define DECODE_HEAD \
83 __be32 *p; \
84 __be32 status
85#define DECODE_TAIL \
86 status = 0; \
87out: \
88 return status; \
89xdr_error: \
90 dprintk("NFSD: xdr error (%s:%d)\n", \
91 __FILE__, __LINE__); \
92 status = nfserr_bad_xdr; \
93 goto out
94
95#define READ32(x) (x) = ntohl(*p++)
96#define READ64(x) do { \
97 (x) = (u64)ntohl(*p++) << 32; \
98 (x) |= ntohl(*p++); \
99} while (0)
100#define READTIME(x) do { \
101 p++; \
102 (x) = ntohl(*p++); \
103 p++; \
104} while (0)
105#define READMEM(x,nbytes) do { \
106 x = (char *)p; \
107 p += XDR_QUADLEN(nbytes); \
108} while (0)
109#define SAVEMEM(x,nbytes) do { \
110 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
111 savemem(argp, p, nbytes) : \
112 (char *)p)) { \
113 dprintk("NFSD: xdr error (%s:%d)\n", \
114 __FILE__, __LINE__); \
115 goto xdr_error; \
116 } \
117 p += XDR_QUADLEN(nbytes); \
118} while (0)
119#define COPYMEM(x,nbytes) do { \
120 memcpy((x), p, nbytes); \
121 p += XDR_QUADLEN(nbytes); \
122} while (0)
123
124/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
125#define READ_BUF(nbytes) do { \
126 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
127 p = argp->p; \
128 argp->p += XDR_QUADLEN(nbytes); \
129 } else if (!(p = read_buf(argp, nbytes))) { \
130 dprintk("NFSD: xdr error (%s:%d)\n", \
131 __FILE__, __LINE__); \
132 goto xdr_error; \
133 } \
134} while (0)
135
136static void save_buf(struct nfsd4_compoundargs *argp, struct nfsd4_saved_compoundargs *savep)
137{
138 savep->p = argp->p;
139 savep->end = argp->end;
140 savep->pagelen = argp->pagelen;
141 savep->pagelist = argp->pagelist;
142}
143
144static void restore_buf(struct nfsd4_compoundargs *argp, struct nfsd4_saved_compoundargs *savep)
145{
146 argp->p = savep->p;
147 argp->end = savep->end;
148 argp->pagelen = savep->pagelen;
149 argp->pagelist = savep->pagelist;
150}
151
152static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
153{
154 /* We want more bytes than seem to be available.
155 * Maybe we need a new page, maybe we have just run out
156 */
157 unsigned int avail = (char *)argp->end - (char *)argp->p;
158 __be32 *p;
159 if (avail + argp->pagelen < nbytes)
160 return NULL;
161 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
162 return NULL;
163 /* ok, we can do it with the current plus the next page */
164 if (nbytes <= sizeof(argp->tmp))
165 p = argp->tmp;
166 else {
167 kfree(argp->tmpp);
168 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
169 if (!p)
170 return NULL;
171
172 }
173 /*
174 * The following memcpy is safe because read_buf is always
175 * called with nbytes > avail, and the two cases above both
176 * guarantee p points to at least nbytes bytes.
177 */
178 memcpy(p, argp->p, avail);
179 /* step to next page */
180 argp->p = page_address(argp->pagelist[0]);
181 argp->pagelist++;
182 if (argp->pagelen < PAGE_SIZE) {
183 argp->end = argp->p + (argp->pagelen>>2);
184 argp->pagelen = 0;
185 } else {
186 argp->end = argp->p + (PAGE_SIZE>>2);
187 argp->pagelen -= PAGE_SIZE;
188 }
189 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
190 argp->p += XDR_QUADLEN(nbytes - avail);
191 return p;
192}
193
194static int zero_clientid(clientid_t *clid)
195{
196 return (clid->cl_boot == 0) && (clid->cl_id == 0);
197}
198
199static int
200defer_free(struct nfsd4_compoundargs *argp,
201 void (*release)(const void *), void *p)
202{
203 struct tmpbuf *tb;
204
205 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
206 if (!tb)
207 return -ENOMEM;
208 tb->buf = p;
209 tb->release = release;
210 tb->next = argp->to_free;
211 argp->to_free = tb;
212 return 0;
213}
214
215static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
216{
217 if (p == argp->tmp) {
218 p = kmalloc(nbytes, GFP_KERNEL);
219 if (!p)
220 return NULL;
221 memcpy(p, argp->tmp, nbytes);
222 } else {
223 BUG_ON(p != argp->tmpp);
224 argp->tmpp = NULL;
225 }
226 if (defer_free(argp, kfree, p)) {
227 kfree(p);
228 return NULL;
229 } else
230 return (char *)p;
231}
232
233static __be32
234nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
235{
236 u32 bmlen;
237 DECODE_HEAD;
238
239 bmval[0] = 0;
240 bmval[1] = 0;
241 bmval[2] = 0;
242
243 READ_BUF(4);
244 READ32(bmlen);
245 if (bmlen > 1000)
246 goto xdr_error;
247
248 READ_BUF(bmlen << 2);
249 if (bmlen > 0)
250 READ32(bmval[0]);
251 if (bmlen > 1)
252 READ32(bmval[1]);
253 if (bmlen > 2)
254 READ32(bmval[2]);
255
256 DECODE_TAIL;
257}
258
259static __be32
260nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
261 struct iattr *iattr, struct nfs4_acl **acl)
262{
263 int expected_len, len = 0;
264 u32 dummy32;
265 char *buf;
266 int host_err;
267
268 DECODE_HEAD;
269 iattr->ia_valid = 0;
270 if ((status = nfsd4_decode_bitmap(argp, bmval)))
271 return status;
272
273 READ_BUF(4);
274 READ32(expected_len);
275
276 if (bmval[0] & FATTR4_WORD0_SIZE) {
277 READ_BUF(8);
278 len += 8;
279 READ64(iattr->ia_size);
280 iattr->ia_valid |= ATTR_SIZE;
281 }
282 if (bmval[0] & FATTR4_WORD0_ACL) {
283 int nace;
284 struct nfs4_ace *ace;
285
286 READ_BUF(4); len += 4;
287 READ32(nace);
288
289 if (nace > NFS4_ACL_MAX)
290 return nfserr_resource;
291
292 *acl = nfs4_acl_new(nace);
293 if (*acl == NULL) {
294 host_err = -ENOMEM;
295 goto out_nfserr;
296 }
297 defer_free(argp, kfree, *acl);
298
299 (*acl)->naces = nace;
300 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
301 READ_BUF(16); len += 16;
302 READ32(ace->type);
303 READ32(ace->flag);
304 READ32(ace->access_mask);
305 READ32(dummy32);
306 READ_BUF(dummy32);
307 len += XDR_QUADLEN(dummy32) << 2;
308 READMEM(buf, dummy32);
309 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
310 status = nfs_ok;
311 if (ace->whotype != NFS4_ACL_WHO_NAMED)
312 ace->who = 0;
313 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
314 status = nfsd_map_name_to_gid(argp->rqstp,
315 buf, dummy32, &ace->who);
316 else
317 status = nfsd_map_name_to_uid(argp->rqstp,
318 buf, dummy32, &ace->who);
319 if (status)
320 return status;
321 }
322 } else
323 *acl = NULL;
324 if (bmval[1] & FATTR4_WORD1_MODE) {
325 READ_BUF(4);
326 len += 4;
327 READ32(iattr->ia_mode);
328 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
329 iattr->ia_valid |= ATTR_MODE;
330 }
331 if (bmval[1] & FATTR4_WORD1_OWNER) {
332 READ_BUF(4);
333 len += 4;
334 READ32(dummy32);
335 READ_BUF(dummy32);
336 len += (XDR_QUADLEN(dummy32) << 2);
337 READMEM(buf, dummy32);
338 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
339 return status;
340 iattr->ia_valid |= ATTR_UID;
341 }
342 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
343 READ_BUF(4);
344 len += 4;
345 READ32(dummy32);
346 READ_BUF(dummy32);
347 len += (XDR_QUADLEN(dummy32) << 2);
348 READMEM(buf, dummy32);
349 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
350 return status;
351 iattr->ia_valid |= ATTR_GID;
352 }
353 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
354 READ_BUF(4);
355 len += 4;
356 READ32(dummy32);
357 switch (dummy32) {
358 case NFS4_SET_TO_CLIENT_TIME:
359 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
360 all 32 bits of 'nseconds'. */
361 READ_BUF(12);
362 len += 12;
363 READ32(dummy32);
364 if (dummy32)
365 return nfserr_inval;
366 READ32(iattr->ia_atime.tv_sec);
367 READ32(iattr->ia_atime.tv_nsec);
368 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
369 return nfserr_inval;
370 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
371 break;
372 case NFS4_SET_TO_SERVER_TIME:
373 iattr->ia_valid |= ATTR_ATIME;
374 break;
375 default:
376 goto xdr_error;
377 }
378 }
379 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
380 READ_BUF(4);
381 len += 4;
382 READ32(dummy32);
383 switch (dummy32) {
384 case NFS4_SET_TO_CLIENT_TIME:
385 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
386 all 32 bits of 'nseconds'. */
387 READ_BUF(12);
388 len += 12;
389 READ32(dummy32);
390 if (dummy32)
391 return nfserr_inval;
392 READ32(iattr->ia_mtime.tv_sec);
393 READ32(iattr->ia_mtime.tv_nsec);
394 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
395 return nfserr_inval;
396 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
397 break;
398 case NFS4_SET_TO_SERVER_TIME:
399 iattr->ia_valid |= ATTR_MTIME;
400 break;
401 default:
402 goto xdr_error;
403 }
404 }
405 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
406 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
407 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
408 READ_BUF(expected_len - len);
409 else if (len != expected_len)
410 goto xdr_error;
411
412 DECODE_TAIL;
413
414out_nfserr:
415 status = nfserrno(host_err);
416 goto out;
417}
418
419static __be32
420nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
421{
422 DECODE_HEAD;
423
424 READ_BUF(sizeof(stateid_t));
425 READ32(sid->si_generation);
426 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
427
428 DECODE_TAIL;
429}
430
431static __be32
432nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
433{
434 DECODE_HEAD;
435
436 READ_BUF(4);
437 READ32(access->ac_req_access);
438
439 DECODE_TAIL;
440}
441
442static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
443{
444 DECODE_HEAD;
445
446 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
447 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
448 READ32(bcts->dir);
449 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
450 * could help us figure out we should be using it. */
451 DECODE_TAIL;
452}
453
454static __be32
455nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
456{
457 DECODE_HEAD;
458
459 close->cl_stateowner = NULL;
460 READ_BUF(4);
461 READ32(close->cl_seqid);
462 return nfsd4_decode_stateid(argp, &close->cl_stateid);
463
464 DECODE_TAIL;
465}
466
467
468static __be32
469nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
470{
471 DECODE_HEAD;
472
473 READ_BUF(12);
474 READ64(commit->co_offset);
475 READ32(commit->co_count);
476
477 DECODE_TAIL;
478}
479
480static __be32
481nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
482{
483 DECODE_HEAD;
484
485 READ_BUF(4);
486 READ32(create->cr_type);
487 switch (create->cr_type) {
488 case NF4LNK:
489 READ_BUF(4);
490 READ32(create->cr_linklen);
491 READ_BUF(create->cr_linklen);
492 SAVEMEM(create->cr_linkname, create->cr_linklen);
493 break;
494 case NF4BLK:
495 case NF4CHR:
496 READ_BUF(8);
497 READ32(create->cr_specdata1);
498 READ32(create->cr_specdata2);
499 break;
500 case NF4SOCK:
501 case NF4FIFO:
502 case NF4DIR:
503 default:
504 break;
505 }
506
507 READ_BUF(4);
508 READ32(create->cr_namelen);
509 READ_BUF(create->cr_namelen);
510 SAVEMEM(create->cr_name, create->cr_namelen);
511 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
512 return status;
513
514 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
515 &create->cr_acl);
516 if (status)
517 goto out;
518
519 DECODE_TAIL;
520}
521
522static inline __be32
523nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
524{
525 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
526}
527
528static inline __be32
529nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
530{
531 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
532}
533
534static __be32
535nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
536{
537 DECODE_HEAD;
538
539 READ_BUF(4);
540 READ32(link->li_namelen);
541 READ_BUF(link->li_namelen);
542 SAVEMEM(link->li_name, link->li_namelen);
543 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
544 return status;
545
546 DECODE_TAIL;
547}
548
549static __be32
550nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
551{
552 DECODE_HEAD;
553
554 lock->lk_replay_owner = NULL;
555 /*
556 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
557 */
558 READ_BUF(28);
559 READ32(lock->lk_type);
560 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
561 goto xdr_error;
562 READ32(lock->lk_reclaim);
563 READ64(lock->lk_offset);
564 READ64(lock->lk_length);
565 READ32(lock->lk_is_new);
566
567 if (lock->lk_is_new) {
568 READ_BUF(4);
569 READ32(lock->lk_new_open_seqid);
570 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
571 if (status)
572 return status;
573 READ_BUF(8 + sizeof(clientid_t));
574 READ32(lock->lk_new_lock_seqid);
575 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
576 READ32(lock->lk_new_owner.len);
577 READ_BUF(lock->lk_new_owner.len);
578 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
579 } else {
580 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
581 if (status)
582 return status;
583 READ_BUF(4);
584 READ32(lock->lk_old_lock_seqid);
585 }
586
587 DECODE_TAIL;
588}
589
590static __be32
591nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
592{
593 DECODE_HEAD;
594
595 READ_BUF(32);
596 READ32(lockt->lt_type);
597 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
598 goto xdr_error;
599 READ64(lockt->lt_offset);
600 READ64(lockt->lt_length);
601 COPYMEM(&lockt->lt_clientid, 8);
602 READ32(lockt->lt_owner.len);
603 READ_BUF(lockt->lt_owner.len);
604 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
605
606 DECODE_TAIL;
607}
608
609static __be32
610nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
611{
612 DECODE_HEAD;
613
614 locku->lu_stateowner = NULL;
615 READ_BUF(8);
616 READ32(locku->lu_type);
617 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
618 goto xdr_error;
619 READ32(locku->lu_seqid);
620 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
621 if (status)
622 return status;
623 READ_BUF(16);
624 READ64(locku->lu_offset);
625 READ64(locku->lu_length);
626
627 DECODE_TAIL;
628}
629
630static __be32
631nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
632{
633 DECODE_HEAD;
634
635 READ_BUF(4);
636 READ32(lookup->lo_len);
637 READ_BUF(lookup->lo_len);
638 SAVEMEM(lookup->lo_name, lookup->lo_len);
639 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
640 return status;
641
642 DECODE_TAIL;
643}
644
645static __be32
646nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
647{
648 DECODE_HEAD;
649
650 memset(open->op_bmval, 0, sizeof(open->op_bmval));
651 open->op_iattr.ia_valid = 0;
652 open->op_stateowner = NULL;
653
654 /* seqid, share_access, share_deny, clientid, ownerlen */
655 READ_BUF(16 + sizeof(clientid_t));
656 READ32(open->op_seqid);
657 READ32(open->op_share_access);
658 READ32(open->op_share_deny);
659 COPYMEM(&open->op_clientid, sizeof(clientid_t));
660 READ32(open->op_owner.len);
661
662 /* owner, open_flag */
663 READ_BUF(open->op_owner.len + 4);
664 SAVEMEM(open->op_owner.data, open->op_owner.len);
665 READ32(open->op_create);
666 switch (open->op_create) {
667 case NFS4_OPEN_NOCREATE:
668 break;
669 case NFS4_OPEN_CREATE:
670 READ_BUF(4);
671 READ32(open->op_createmode);
672 switch (open->op_createmode) {
673 case NFS4_CREATE_UNCHECKED:
674 case NFS4_CREATE_GUARDED:
675 status = nfsd4_decode_fattr(argp, open->op_bmval,
676 &open->op_iattr, &open->op_acl);
677 if (status)
678 goto out;
679 break;
680 case NFS4_CREATE_EXCLUSIVE:
681 READ_BUF(8);
682 COPYMEM(open->op_verf.data, 8);
683 break;
684 case NFS4_CREATE_EXCLUSIVE4_1:
685 if (argp->minorversion < 1)
686 goto xdr_error;
687 READ_BUF(8);
688 COPYMEM(open->op_verf.data, 8);
689 status = nfsd4_decode_fattr(argp, open->op_bmval,
690 &open->op_iattr, &open->op_acl);
691 if (status)
692 goto out;
693 break;
694 default:
695 goto xdr_error;
696 }
697 break;
698 default:
699 goto xdr_error;
700 }
701
702 /* open_claim */
703 READ_BUF(4);
704 READ32(open->op_claim_type);
705 switch (open->op_claim_type) {
706 case NFS4_OPEN_CLAIM_NULL:
707 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
708 READ_BUF(4);
709 READ32(open->op_fname.len);
710 READ_BUF(open->op_fname.len);
711 SAVEMEM(open->op_fname.data, open->op_fname.len);
712 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
713 return status;
714 break;
715 case NFS4_OPEN_CLAIM_PREVIOUS:
716 READ_BUF(4);
717 READ32(open->op_delegate_type);
718 break;
719 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
720 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
721 if (status)
722 return status;
723 READ_BUF(4);
724 READ32(open->op_fname.len);
725 READ_BUF(open->op_fname.len);
726 SAVEMEM(open->op_fname.data, open->op_fname.len);
727 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
728 return status;
729 break;
730 default:
731 goto xdr_error;
732 }
733
734 DECODE_TAIL;
735}
736
737static __be32
738nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
739{
740 DECODE_HEAD;
741
742 open_conf->oc_stateowner = NULL;
743 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
744 if (status)
745 return status;
746 READ_BUF(4);
747 READ32(open_conf->oc_seqid);
748
749 DECODE_TAIL;
750}
751
752static __be32
753nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
754{
755 DECODE_HEAD;
756
757 open_down->od_stateowner = NULL;
758 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
759 if (status)
760 return status;
761 READ_BUF(12);
762 READ32(open_down->od_seqid);
763 READ32(open_down->od_share_access);
764 READ32(open_down->od_share_deny);
765
766 DECODE_TAIL;
767}
768
769static __be32
770nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
771{
772 DECODE_HEAD;
773
774 READ_BUF(4);
775 READ32(putfh->pf_fhlen);
776 if (putfh->pf_fhlen > NFS4_FHSIZE)
777 goto xdr_error;
778 READ_BUF(putfh->pf_fhlen);
779 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
780
781 DECODE_TAIL;
782}
783
784static __be32
785nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
786{
787 DECODE_HEAD;
788
789 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
790 if (status)
791 return status;
792 READ_BUF(12);
793 READ64(read->rd_offset);
794 READ32(read->rd_length);
795
796 DECODE_TAIL;
797}
798
799static __be32
800nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
801{
802 DECODE_HEAD;
803
804 READ_BUF(24);
805 READ64(readdir->rd_cookie);
806 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
807 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
808 READ32(readdir->rd_maxcount);
809 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
810 goto out;
811
812 DECODE_TAIL;
813}
814
815static __be32
816nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
817{
818 DECODE_HEAD;
819
820 READ_BUF(4);
821 READ32(remove->rm_namelen);
822 READ_BUF(remove->rm_namelen);
823 SAVEMEM(remove->rm_name, remove->rm_namelen);
824 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
825 return status;
826
827 DECODE_TAIL;
828}
829
830static __be32
831nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
832{
833 DECODE_HEAD;
834
835 READ_BUF(4);
836 READ32(rename->rn_snamelen);
837 READ_BUF(rename->rn_snamelen + 4);
838 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
839 READ32(rename->rn_tnamelen);
840 READ_BUF(rename->rn_tnamelen);
841 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
842 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
843 return status;
844 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
845 return status;
846
847 DECODE_TAIL;
848}
849
850static __be32
851nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
852{
853 DECODE_HEAD;
854
855 READ_BUF(sizeof(clientid_t));
856 COPYMEM(clientid, sizeof(clientid_t));
857
858 DECODE_TAIL;
859}
860
861static __be32
862nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
863 struct nfsd4_secinfo *secinfo)
864{
865 DECODE_HEAD;
866
867 READ_BUF(4);
868 READ32(secinfo->si_namelen);
869 READ_BUF(secinfo->si_namelen);
870 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
871 status = check_filename(secinfo->si_name, secinfo->si_namelen,
872 nfserr_noent);
873 if (status)
874 return status;
875 DECODE_TAIL;
876}
877
878static __be32
879nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
880 struct nfsd4_secinfo_no_name *sin)
881{
882 DECODE_HEAD;
883
884 READ_BUF(4);
885 READ32(sin->sin_style);
886 DECODE_TAIL;
887}
888
889static __be32
890nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
891{
892 __be32 status;
893
894 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
895 if (status)
896 return status;
897 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
898 &setattr->sa_acl);
899}
900
901static __be32
902nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
903{
904 DECODE_HEAD;
905
906 READ_BUF(12);
907 COPYMEM(setclientid->se_verf.data, 8);
908 READ32(setclientid->se_namelen);
909
910 READ_BUF(setclientid->se_namelen + 8);
911 SAVEMEM(setclientid->se_name, setclientid->se_namelen);
912 READ32(setclientid->se_callback_prog);
913 READ32(setclientid->se_callback_netid_len);
914
915 READ_BUF(setclientid->se_callback_netid_len + 4);
916 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
917 READ32(setclientid->se_callback_addr_len);
918
919 READ_BUF(setclientid->se_callback_addr_len + 4);
920 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
921 READ32(setclientid->se_callback_ident);
922
923 DECODE_TAIL;
924}
925
926static __be32
927nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
928{
929 DECODE_HEAD;
930
931 READ_BUF(8 + sizeof(nfs4_verifier));
932 COPYMEM(&scd_c->sc_clientid, 8);
933 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
934
935 DECODE_TAIL;
936}
937
938/* Also used for NVERIFY */
939static __be32
940nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
941{
942#if 0
943 struct nfsd4_compoundargs save = {
944 .p = argp->p,
945 .end = argp->end,
946 .rqstp = argp->rqstp,
947 };
948 u32 ve_bmval[2];
949 struct iattr ve_iattr; /* request */
950 struct nfs4_acl *ve_acl; /* request */
951#endif
952 DECODE_HEAD;
953
954 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
955 goto out;
956
957 /* For convenience's sake, we compare raw xdr'd attributes in
958 * nfsd4_proc_verify; however we still decode here just to return
959 * correct error in case of bad xdr. */
960#if 0
961 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
962 if (status == nfserr_inval) {
963 status = nfserrno(status);
964 goto out;
965 }
966#endif
967 READ_BUF(4);
968 READ32(verify->ve_attrlen);
969 READ_BUF(verify->ve_attrlen);
970 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
971
972 DECODE_TAIL;
973}
974
975static __be32
976nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
977{
978 int avail;
979 int v;
980 int len;
981 DECODE_HEAD;
982
983 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
984 if (status)
985 return status;
986 READ_BUF(16);
987 READ64(write->wr_offset);
988 READ32(write->wr_stable_how);
989 if (write->wr_stable_how > 2)
990 goto xdr_error;
991 READ32(write->wr_buflen);
992
993 /* Sorry .. no magic macros for this.. *
994 * READ_BUF(write->wr_buflen);
995 * SAVEMEM(write->wr_buf, write->wr_buflen);
996 */
997 avail = (char*)argp->end - (char*)argp->p;
998 if (avail + argp->pagelen < write->wr_buflen) {
999 dprintk("NFSD: xdr error (%s:%d)\n",
1000 __FILE__, __LINE__);
1001 goto xdr_error;
1002 }
1003 argp->rqstp->rq_vec[0].iov_base = p;
1004 argp->rqstp->rq_vec[0].iov_len = avail;
1005 v = 0;
1006 len = write->wr_buflen;
1007 while (len > argp->rqstp->rq_vec[v].iov_len) {
1008 len -= argp->rqstp->rq_vec[v].iov_len;
1009 v++;
1010 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]);
1011 argp->pagelist++;
1012 if (argp->pagelen >= PAGE_SIZE) {
1013 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE;
1014 argp->pagelen -= PAGE_SIZE;
1015 } else {
1016 argp->rqstp->rq_vec[v].iov_len = argp->pagelen;
1017 argp->pagelen -= len;
1018 }
1019 }
1020 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len);
1021 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
1022 argp->rqstp->rq_vec[v].iov_len = len;
1023 write->wr_vlen = v+1;
1024
1025 DECODE_TAIL;
1026}
1027
1028static __be32
1029nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1030{
1031 DECODE_HEAD;
1032
1033 READ_BUF(12);
1034 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1035 READ32(rlockowner->rl_owner.len);
1036 READ_BUF(rlockowner->rl_owner.len);
1037 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1038
1039 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1040 return nfserr_inval;
1041 DECODE_TAIL;
1042}
1043
1044static __be32
1045nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1046 struct nfsd4_exchange_id *exid)
1047{
1048 int dummy, tmp;
1049 DECODE_HEAD;
1050
1051 READ_BUF(NFS4_VERIFIER_SIZE);
1052 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1053
1054 READ_BUF(4);
1055 READ32(exid->clname.len);
1056
1057 READ_BUF(exid->clname.len);
1058 SAVEMEM(exid->clname.data, exid->clname.len);
1059
1060 READ_BUF(4);
1061 READ32(exid->flags);
1062
1063 /* Ignore state_protect4_a */
1064 READ_BUF(4);
1065 READ32(exid->spa_how);
1066 switch (exid->spa_how) {
1067 case SP4_NONE:
1068 break;
1069 case SP4_MACH_CRED:
1070 /* spo_must_enforce */
1071 READ_BUF(4);
1072 READ32(dummy);
1073 READ_BUF(dummy * 4);
1074 p += dummy;
1075
1076 /* spo_must_allow */
1077 READ_BUF(4);
1078 READ32(dummy);
1079 READ_BUF(dummy * 4);
1080 p += dummy;
1081 break;
1082 case SP4_SSV:
1083 /* ssp_ops */
1084 READ_BUF(4);
1085 READ32(dummy);
1086 READ_BUF(dummy * 4);
1087 p += dummy;
1088
1089 READ_BUF(4);
1090 READ32(dummy);
1091 READ_BUF(dummy * 4);
1092 p += dummy;
1093
1094 /* ssp_hash_algs<> */
1095 READ_BUF(4);
1096 READ32(tmp);
1097 while (tmp--) {
1098 READ_BUF(4);
1099 READ32(dummy);
1100 READ_BUF(dummy);
1101 p += XDR_QUADLEN(dummy);
1102 }
1103
1104 /* ssp_encr_algs<> */
1105 READ_BUF(4);
1106 READ32(tmp);
1107 while (tmp--) {
1108 READ_BUF(4);
1109 READ32(dummy);
1110 READ_BUF(dummy);
1111 p += XDR_QUADLEN(dummy);
1112 }
1113
1114 /* ssp_window and ssp_num_gss_handles */
1115 READ_BUF(8);
1116 READ32(dummy);
1117 READ32(dummy);
1118 break;
1119 default:
1120 goto xdr_error;
1121 }
1122
1123 /* Ignore Implementation ID */
1124 READ_BUF(4); /* nfs_impl_id4 array length */
1125 READ32(dummy);
1126
1127 if (dummy > 1)
1128 goto xdr_error;
1129
1130 if (dummy == 1) {
1131 /* nii_domain */
1132 READ_BUF(4);
1133 READ32(dummy);
1134 READ_BUF(dummy);
1135 p += XDR_QUADLEN(dummy);
1136
1137 /* nii_name */
1138 READ_BUF(4);
1139 READ32(dummy);
1140 READ_BUF(dummy);
1141 p += XDR_QUADLEN(dummy);
1142
1143 /* nii_date */
1144 READ_BUF(12);
1145 p += 3;
1146 }
1147 DECODE_TAIL;
1148}
1149
1150static __be32
1151nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1152 struct nfsd4_create_session *sess)
1153{
1154 DECODE_HEAD;
1155
1156 u32 dummy;
1157 char *machine_name;
1158 int i;
1159 int nr_secflavs;
1160
1161 READ_BUF(16);
1162 COPYMEM(&sess->clientid, 8);
1163 READ32(sess->seqid);
1164 READ32(sess->flags);
1165
1166 /* Fore channel attrs */
1167 READ_BUF(28);
1168 READ32(dummy); /* headerpadsz is always 0 */
1169 READ32(sess->fore_channel.maxreq_sz);
1170 READ32(sess->fore_channel.maxresp_sz);
1171 READ32(sess->fore_channel.maxresp_cached);
1172 READ32(sess->fore_channel.maxops);
1173 READ32(sess->fore_channel.maxreqs);
1174 READ32(sess->fore_channel.nr_rdma_attrs);
1175 if (sess->fore_channel.nr_rdma_attrs == 1) {
1176 READ_BUF(4);
1177 READ32(sess->fore_channel.rdma_attrs);
1178 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1179 dprintk("Too many fore channel attr bitmaps!\n");
1180 goto xdr_error;
1181 }
1182
1183 /* Back channel attrs */
1184 READ_BUF(28);
1185 READ32(dummy); /* headerpadsz is always 0 */
1186 READ32(sess->back_channel.maxreq_sz);
1187 READ32(sess->back_channel.maxresp_sz);
1188 READ32(sess->back_channel.maxresp_cached);
1189 READ32(sess->back_channel.maxops);
1190 READ32(sess->back_channel.maxreqs);
1191 READ32(sess->back_channel.nr_rdma_attrs);
1192 if (sess->back_channel.nr_rdma_attrs == 1) {
1193 READ_BUF(4);
1194 READ32(sess->back_channel.rdma_attrs);
1195 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1196 dprintk("Too many back channel attr bitmaps!\n");
1197 goto xdr_error;
1198 }
1199
1200 READ_BUF(8);
1201 READ32(sess->callback_prog);
1202
1203 /* callback_sec_params4 */
1204 READ32(nr_secflavs);
1205 for (i = 0; i < nr_secflavs; ++i) {
1206 READ_BUF(4);
1207 READ32(dummy);
1208 switch (dummy) {
1209 case RPC_AUTH_NULL:
1210 /* Nothing to read */
1211 break;
1212 case RPC_AUTH_UNIX:
1213 READ_BUF(8);
1214 /* stamp */
1215 READ32(dummy);
1216
1217 /* machine name */
1218 READ32(dummy);
1219 READ_BUF(dummy);
1220 SAVEMEM(machine_name, dummy);
1221
1222 /* uid, gid */
1223 READ_BUF(8);
1224 READ32(sess->uid);
1225 READ32(sess->gid);
1226
1227 /* more gids */
1228 READ_BUF(4);
1229 READ32(dummy);
1230 READ_BUF(dummy * 4);
1231 break;
1232 case RPC_AUTH_GSS:
1233 dprintk("RPC_AUTH_GSS callback secflavor "
1234 "not supported!\n");
1235 READ_BUF(8);
1236 /* gcbp_service */
1237 READ32(dummy);
1238 /* gcbp_handle_from_server */
1239 READ32(dummy);
1240 READ_BUF(dummy);
1241 p += XDR_QUADLEN(dummy);
1242 /* gcbp_handle_from_client */
1243 READ_BUF(4);
1244 READ32(dummy);
1245 READ_BUF(dummy);
1246 break;
1247 default:
1248 dprintk("Illegal callback secflavor\n");
1249 return nfserr_inval;
1250 }
1251 }
1252 DECODE_TAIL;
1253}
1254
1255static __be32
1256nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1257 struct nfsd4_destroy_session *destroy_session)
1258{
1259 DECODE_HEAD;
1260 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1261 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1262
1263 DECODE_TAIL;
1264}
1265
1266static __be32
1267nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1268 struct nfsd4_free_stateid *free_stateid)
1269{
1270 DECODE_HEAD;
1271
1272 READ_BUF(sizeof(stateid_t));
1273 READ32(free_stateid->fr_stateid.si_generation);
1274 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1275
1276 DECODE_TAIL;
1277}
1278
1279static __be32
1280nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1281 struct nfsd4_sequence *seq)
1282{
1283 DECODE_HEAD;
1284
1285 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1286 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1287 READ32(seq->seqid);
1288 READ32(seq->slotid);
1289 READ32(seq->maxslots);
1290 READ32(seq->cachethis);
1291
1292 DECODE_TAIL;
1293}
1294
1295static __be32
1296nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1297{
1298 unsigned int nbytes;
1299 stateid_t si;
1300 int i;
1301 __be32 *p;
1302 __be32 status;
1303
1304 READ_BUF(4);
1305 test_stateid->ts_num_ids = ntohl(*p++);
1306
1307 nbytes = test_stateid->ts_num_ids * sizeof(stateid_t);
1308 if (nbytes > (u32)((char *)argp->end - (char *)argp->p))
1309 goto xdr_error;
1310
1311 test_stateid->ts_saved_args = argp;
1312 save_buf(argp, &test_stateid->ts_savedp);
1313
1314 for (i = 0; i < test_stateid->ts_num_ids; i++) {
1315 status = nfsd4_decode_stateid(argp, &si);
1316 if (status)
1317 return status;
1318 }
1319
1320 status = 0;
1321out:
1322 return status;
1323xdr_error:
1324 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1325 status = nfserr_bad_xdr;
1326 goto out;
1327}
1328
1329static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1330{
1331 DECODE_HEAD;
1332
1333 READ_BUF(4);
1334 READ32(rc->rca_one_fs);
1335
1336 DECODE_TAIL;
1337}
1338
1339static __be32
1340nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1341{
1342 return nfs_ok;
1343}
1344
1345static __be32
1346nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1347{
1348 return nfserr_notsupp;
1349}
1350
1351typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1352
1353static nfsd4_dec nfsd4_dec_ops[] = {
1354 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1355 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1356 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1357 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1358 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1359 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1360 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1361 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1362 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1363 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1364 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1365 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1366 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1367 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1368 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1369 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1370 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1371 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1372 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1373 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1374 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop,
1375 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1376 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1377 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1378 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1379 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1380 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1381 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1382 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1383 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1384 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1385 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1386 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1387 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1388 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1389 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1390 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
1391};
1392
1393static nfsd4_dec nfsd41_dec_ops[] = {
1394 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1395 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1396 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1397 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1398 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1399 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1400 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1401 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1402 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1403 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1404 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1405 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1406 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1407 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1408 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1409 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1410 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1411 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_notsupp,
1412 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1413 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1414 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_notsupp,
1415 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1416 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1417 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1418 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1419 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1420 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1421 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_notsupp,
1422 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1423 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1424 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1425 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1426 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1427 [OP_SETCLIENTID_CONFIRM]= (nfsd4_dec)nfsd4_decode_notsupp,
1428 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1429 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1430 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_notsupp,
1431
1432 /* new operations for NFSv4.1 */
1433 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_notsupp,
1434 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
1435 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1436 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1437 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
1438 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
1439 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1440 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1441 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1442 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1443 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1444 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
1445 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
1446 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1447 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
1448 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
1449 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1450 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1451 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
1452};
1453
1454struct nfsd4_minorversion_ops {
1455 nfsd4_dec *decoders;
1456 int nops;
1457};
1458
1459static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
1460 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
1461 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
1462};
1463
1464static __be32
1465nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1466{
1467 DECODE_HEAD;
1468 struct nfsd4_op *op;
1469 struct nfsd4_minorversion_ops *ops;
1470 bool cachethis = false;
1471 int i;
1472
1473 /*
1474 * XXX: According to spec, we should check the tag
1475 * for UTF-8 compliance. I'm postponing this for
1476 * now because it seems that some clients do use
1477 * binary tags.
1478 */
1479 READ_BUF(4);
1480 READ32(argp->taglen);
1481 READ_BUF(argp->taglen + 8);
1482 SAVEMEM(argp->tag, argp->taglen);
1483 READ32(argp->minorversion);
1484 READ32(argp->opcnt);
1485
1486 if (argp->taglen > NFSD4_MAX_TAGLEN)
1487 goto xdr_error;
1488 if (argp->opcnt > 100)
1489 goto xdr_error;
1490
1491 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1492 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1493 if (!argp->ops) {
1494 argp->ops = argp->iops;
1495 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1496 goto xdr_error;
1497 }
1498 }
1499
1500 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion))
1501 argp->opcnt = 0;
1502
1503 ops = &nfsd4_minorversion[argp->minorversion];
1504 for (i = 0; i < argp->opcnt; i++) {
1505 op = &argp->ops[i];
1506 op->replay = NULL;
1507
1508 /*
1509 * We can't use READ_BUF() here because we need to handle
1510 * a missing opcode as an OP_WRITE + 1. So we need to check
1511 * to see if we're truly at the end of our buffer or if there
1512 * is another page we need to flip to.
1513 */
1514
1515 if (argp->p == argp->end) {
1516 if (argp->pagelen < 4) {
1517 /* There isn't an opcode still on the wire */
1518 op->opnum = OP_WRITE + 1;
1519 op->status = nfserr_bad_xdr;
1520 argp->opcnt = i+1;
1521 break;
1522 }
1523
1524 /*
1525 * False alarm. We just hit a page boundary, but there
1526 * is still data available. Move pointer across page
1527 * boundary. *snip from READ_BUF*
1528 */
1529 argp->p = page_address(argp->pagelist[0]);
1530 argp->pagelist++;
1531 if (argp->pagelen < PAGE_SIZE) {
1532 argp->end = argp->p + (argp->pagelen>>2);
1533 argp->pagelen = 0;
1534 } else {
1535 argp->end = argp->p + (PAGE_SIZE>>2);
1536 argp->pagelen -= PAGE_SIZE;
1537 }
1538 }
1539 op->opnum = ntohl(*argp->p++);
1540
1541 if (op->opnum >= FIRST_NFS4_OP && op->opnum <= LAST_NFS4_OP)
1542 op->status = ops->decoders[op->opnum](argp, &op->u);
1543 else {
1544 op->opnum = OP_ILLEGAL;
1545 op->status = nfserr_op_illegal;
1546 }
1547
1548 if (op->status) {
1549 argp->opcnt = i+1;
1550 break;
1551 }
1552 /*
1553 * We'll try to cache the result in the DRC if any one
1554 * op in the compound wants to be cached:
1555 */
1556 cachethis |= nfsd4_cache_this_op(op);
1557 }
1558 /* Sessions make the DRC unnecessary: */
1559 if (argp->minorversion)
1560 cachethis = false;
1561 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1562
1563 DECODE_TAIL;
1564}
1565
1566#define WRITE32(n) *p++ = htonl(n)
1567#define WRITE64(n) do { \
1568 *p++ = htonl((u32)((n) >> 32)); \
1569 *p++ = htonl((u32)(n)); \
1570} while (0)
1571#define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1572 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1573 memcpy(p, ptr, nbytes); \
1574 p += XDR_QUADLEN(nbytes); \
1575}} while (0)
1576
1577static void write32(__be32 **p, u32 n)
1578{
1579 *(*p)++ = n;
1580}
1581
1582static void write64(__be32 **p, u64 n)
1583{
1584 write32(p, (u32)(n >> 32));
1585 write32(p, (u32)n);
1586}
1587
1588static void write_change(__be32 **p, struct kstat *stat, struct inode *inode)
1589{
1590 if (IS_I_VERSION(inode)) {
1591 write64(p, inode->i_version);
1592 } else {
1593 write32(p, stat->ctime.tv_sec);
1594 write32(p, stat->ctime.tv_nsec);
1595 }
1596}
1597
1598static void write_cinfo(__be32 **p, struct nfsd4_change_info *c)
1599{
1600 write32(p, c->atomic);
1601 if (c->change_supported) {
1602 write64(p, c->before_change);
1603 write64(p, c->after_change);
1604 } else {
1605 write32(p, c->before_ctime_sec);
1606 write32(p, c->before_ctime_nsec);
1607 write32(p, c->after_ctime_sec);
1608 write32(p, c->after_ctime_nsec);
1609 }
1610}
1611
1612#define RESERVE_SPACE(nbytes) do { \
1613 p = resp->p; \
1614 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1615} while (0)
1616#define ADJUST_ARGS() resp->p = p
1617
1618/*
1619 * Header routine to setup seqid operation replay cache
1620 */
1621#define ENCODE_SEQID_OP_HEAD \
1622 __be32 *save; \
1623 \
1624 save = resp->p;
1625
1626/*
1627 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1628 * is where sequence id's are incremented, and the replay cache is filled.
1629 * Note that we increment sequence id's here, at the last moment, so we're sure
1630 * we know whether the error to be returned is a sequence id mutating error.
1631 */
1632
1633#define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1634 if (seqid_mutating_err(nfserr) && stateowner) { \
1635 stateowner->so_seqid++; \
1636 stateowner->so_replay.rp_status = nfserr; \
1637 stateowner->so_replay.rp_buflen = \
1638 (((char *)(resp)->p - (char *)save)); \
1639 memcpy(stateowner->so_replay.rp_buf, save, \
1640 stateowner->so_replay.rp_buflen); \
1641 } } while (0);
1642
1643/* Encode as an array of strings the string given with components
1644 * separated @sep.
1645 */
1646static __be32 nfsd4_encode_components(char sep, char *components,
1647 __be32 **pp, int *buflen)
1648{
1649 __be32 *p = *pp;
1650 __be32 *countp = p;
1651 int strlen, count=0;
1652 char *str, *end;
1653
1654 dprintk("nfsd4_encode_components(%s)\n", components);
1655 if ((*buflen -= 4) < 0)
1656 return nfserr_resource;
1657 WRITE32(0); /* We will fill this in with @count later */
1658 end = str = components;
1659 while (*end) {
1660 for (; *end && (*end != sep); end++)
1661 ; /* Point to end of component */
1662 strlen = end - str;
1663 if (strlen) {
1664 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1665 return nfserr_resource;
1666 WRITE32(strlen);
1667 WRITEMEM(str, strlen);
1668 count++;
1669 }
1670 else
1671 end++;
1672 str = end;
1673 }
1674 *pp = p;
1675 p = countp;
1676 WRITE32(count);
1677 return 0;
1678}
1679
1680/*
1681 * encode a location element of a fs_locations structure
1682 */
1683static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
1684 __be32 **pp, int *buflen)
1685{
1686 __be32 status;
1687 __be32 *p = *pp;
1688
1689 status = nfsd4_encode_components(':', location->hosts, &p, buflen);
1690 if (status)
1691 return status;
1692 status = nfsd4_encode_components('/', location->path, &p, buflen);
1693 if (status)
1694 return status;
1695 *pp = p;
1696 return 0;
1697}
1698
1699/*
1700 * Return the path to an export point in the pseudo filesystem namespace
1701 * Returned string is safe to use as long as the caller holds a reference
1702 * to @exp.
1703 */
1704static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat)
1705{
1706 struct svc_fh tmp_fh;
1707 char *path = NULL, *rootpath;
1708 size_t rootlen;
1709
1710 fh_init(&tmp_fh, NFS4_FHSIZE);
1711 *stat = exp_pseudoroot(rqstp, &tmp_fh);
1712 if (*stat)
1713 return NULL;
1714 rootpath = tmp_fh.fh_export->ex_pathname;
1715
1716 path = exp->ex_pathname;
1717
1718 rootlen = strlen(rootpath);
1719 if (strncmp(path, rootpath, rootlen)) {
1720 dprintk("nfsd: fs_locations failed;"
1721 "%s is not contained in %s\n", path, rootpath);
1722 *stat = nfserr_notsupp;
1723 path = NULL;
1724 goto out;
1725 }
1726 path += rootlen;
1727out:
1728 fh_put(&tmp_fh);
1729 return path;
1730}
1731
1732/*
1733 * encode a fs_locations structure
1734 */
1735static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
1736 struct svc_export *exp,
1737 __be32 **pp, int *buflen)
1738{
1739 __be32 status;
1740 int i;
1741 __be32 *p = *pp;
1742 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
1743 char *root = nfsd4_path(rqstp, exp, &status);
1744
1745 if (status)
1746 return status;
1747 status = nfsd4_encode_components('/', root, &p, buflen);
1748 if (status)
1749 return status;
1750 if ((*buflen -= 4) < 0)
1751 return nfserr_resource;
1752 WRITE32(fslocs->locations_count);
1753 for (i=0; i<fslocs->locations_count; i++) {
1754 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1755 &p, buflen);
1756 if (status)
1757 return status;
1758 }
1759 *pp = p;
1760 return 0;
1761}
1762
1763static u32 nfs4_ftypes[16] = {
1764 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1765 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1766 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1767 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1768};
1769
1770static __be32
1771nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1772 __be32 **p, int *buflen)
1773{
1774 int status;
1775
1776 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1777 return nfserr_resource;
1778 if (whotype != NFS4_ACL_WHO_NAMED)
1779 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1780 else if (group)
1781 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1782 else
1783 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1784 if (status < 0)
1785 return nfserrno(status);
1786 *p = xdr_encode_opaque(*p, NULL, status);
1787 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1788 BUG_ON(*buflen < 0);
1789 return 0;
1790}
1791
1792static inline __be32
1793nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1794{
1795 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1796}
1797
1798static inline __be32
1799nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1800{
1801 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1802}
1803
1804static inline __be32
1805nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1806 __be32 **p, int *buflen)
1807{
1808 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1809}
1810
1811#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1812 FATTR4_WORD0_RDATTR_ERROR)
1813#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1814
1815static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
1816{
1817 /* As per referral draft: */
1818 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1819 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1820 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1821 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1822 *rdattr_err = NFSERR_MOVED;
1823 else
1824 return nfserr_moved;
1825 }
1826 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1827 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1828 return 0;
1829}
1830
1831/*
1832 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1833 * ourselves.
1834 *
1835 * @countp is the buffer size in _words_; upon successful return this becomes
1836 * replaced with the number of words written.
1837 */
1838__be32
1839nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
1840 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
1841 struct svc_rqst *rqstp, int ignore_crossmnt)
1842{
1843 u32 bmval0 = bmval[0];
1844 u32 bmval1 = bmval[1];
1845 u32 bmval2 = bmval[2];
1846 struct kstat stat;
1847 struct svc_fh tempfh;
1848 struct kstatfs statfs;
1849 int buflen = *countp << 2;
1850 __be32 *attrlenp;
1851 u32 dummy;
1852 u64 dummy64;
1853 u32 rdattr_err = 0;
1854 __be32 *p = buffer;
1855 __be32 status;
1856 int err;
1857 int aclsupport = 0;
1858 struct nfs4_acl *acl = NULL;
1859 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1860 u32 minorversion = resp->cstate.minorversion;
1861 struct path path = {
1862 .mnt = exp->ex_path.mnt,
1863 .dentry = dentry,
1864 };
1865
1866 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1867 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
1868 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
1869 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
1870
1871 if (exp->ex_fslocs.migrated) {
1872 BUG_ON(bmval[2]);
1873 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
1874 if (status)
1875 goto out;
1876 }
1877
1878 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat);
1879 if (err)
1880 goto out_nfserr;
1881 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
1882 FATTR4_WORD0_MAXNAME)) ||
1883 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1884 FATTR4_WORD1_SPACE_TOTAL))) {
1885 err = vfs_statfs(&path, &statfs);
1886 if (err)
1887 goto out_nfserr;
1888 }
1889 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1890 fh_init(&tempfh, NFS4_FHSIZE);
1891 status = fh_compose(&tempfh, exp, dentry, NULL);
1892 if (status)
1893 goto out;
1894 fhp = &tempfh;
1895 }
1896 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1897 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
1898 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1899 aclsupport = (err == 0);
1900 if (bmval0 & FATTR4_WORD0_ACL) {
1901 if (err == -EOPNOTSUPP)
1902 bmval0 &= ~FATTR4_WORD0_ACL;
1903 else if (err == -EINVAL) {
1904 status = nfserr_attrnotsupp;
1905 goto out;
1906 } else if (err != 0)
1907 goto out_nfserr;
1908 }
1909 }
1910
1911 if (bmval2) {
1912 if ((buflen -= 16) < 0)
1913 goto out_resource;
1914 WRITE32(3);
1915 WRITE32(bmval0);
1916 WRITE32(bmval1);
1917 WRITE32(bmval2);
1918 } else if (bmval1) {
1919 if ((buflen -= 12) < 0)
1920 goto out_resource;
1921 WRITE32(2);
1922 WRITE32(bmval0);
1923 WRITE32(bmval1);
1924 } else {
1925 if ((buflen -= 8) < 0)
1926 goto out_resource;
1927 WRITE32(1);
1928 WRITE32(bmval0);
1929 }
1930 attrlenp = p++; /* to be backfilled later */
1931
1932 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
1933 u32 word0 = nfsd_suppattrs0(minorversion);
1934 u32 word1 = nfsd_suppattrs1(minorversion);
1935 u32 word2 = nfsd_suppattrs2(minorversion);
1936
1937 if (!aclsupport)
1938 word0 &= ~FATTR4_WORD0_ACL;
1939 if (!word2) {
1940 if ((buflen -= 12) < 0)
1941 goto out_resource;
1942 WRITE32(2);
1943 WRITE32(word0);
1944 WRITE32(word1);
1945 } else {
1946 if ((buflen -= 16) < 0)
1947 goto out_resource;
1948 WRITE32(3);
1949 WRITE32(word0);
1950 WRITE32(word1);
1951 WRITE32(word2);
1952 }
1953 }
1954 if (bmval0 & FATTR4_WORD0_TYPE) {
1955 if ((buflen -= 4) < 0)
1956 goto out_resource;
1957 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1958 if (dummy == NF4BAD)
1959 goto out_serverfault;
1960 WRITE32(dummy);
1961 }
1962 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1963 if ((buflen -= 4) < 0)
1964 goto out_resource;
1965 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
1966 WRITE32(NFS4_FH_PERSISTENT);
1967 else
1968 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1969 }
1970 if (bmval0 & FATTR4_WORD0_CHANGE) {
1971 if ((buflen -= 8) < 0)
1972 goto out_resource;
1973 write_change(&p, &stat, dentry->d_inode);
1974 }
1975 if (bmval0 & FATTR4_WORD0_SIZE) {
1976 if ((buflen -= 8) < 0)
1977 goto out_resource;
1978 WRITE64(stat.size);
1979 }
1980 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1981 if ((buflen -= 4) < 0)
1982 goto out_resource;
1983 WRITE32(1);
1984 }
1985 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1986 if ((buflen -= 4) < 0)
1987 goto out_resource;
1988 WRITE32(1);
1989 }
1990 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1991 if ((buflen -= 4) < 0)
1992 goto out_resource;
1993 WRITE32(0);
1994 }
1995 if (bmval0 & FATTR4_WORD0_FSID) {
1996 if ((buflen -= 16) < 0)
1997 goto out_resource;
1998 if (exp->ex_fslocs.migrated) {
1999 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
2000 WRITE64(NFS4_REFERRAL_FSID_MINOR);
2001 } else switch(fsid_source(fhp)) {
2002 case FSIDSOURCE_FSID:
2003 WRITE64((u64)exp->ex_fsid);
2004 WRITE64((u64)0);
2005 break;
2006 case FSIDSOURCE_DEV:
2007 WRITE32(0);
2008 WRITE32(MAJOR(stat.dev));
2009 WRITE32(0);
2010 WRITE32(MINOR(stat.dev));
2011 break;
2012 case FSIDSOURCE_UUID:
2013 WRITEMEM(exp->ex_uuid, 16);
2014 break;
2015 }
2016 }
2017 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
2018 if ((buflen -= 4) < 0)
2019 goto out_resource;
2020 WRITE32(0);
2021 }
2022 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
2023 if ((buflen -= 4) < 0)
2024 goto out_resource;
2025 WRITE32(nfsd4_lease);
2026 }
2027 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
2028 if ((buflen -= 4) < 0)
2029 goto out_resource;
2030 WRITE32(rdattr_err);
2031 }
2032 if (bmval0 & FATTR4_WORD0_ACL) {
2033 struct nfs4_ace *ace;
2034
2035 if (acl == NULL) {
2036 if ((buflen -= 4) < 0)
2037 goto out_resource;
2038
2039 WRITE32(0);
2040 goto out_acl;
2041 }
2042 if ((buflen -= 4) < 0)
2043 goto out_resource;
2044 WRITE32(acl->naces);
2045
2046 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
2047 if ((buflen -= 4*3) < 0)
2048 goto out_resource;
2049 WRITE32(ace->type);
2050 WRITE32(ace->flag);
2051 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
2052 status = nfsd4_encode_aclname(rqstp, ace->whotype,
2053 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
2054 &p, &buflen);
2055 if (status == nfserr_resource)
2056 goto out_resource;
2057 if (status)
2058 goto out;
2059 }
2060 }
2061out_acl:
2062 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
2063 if ((buflen -= 4) < 0)
2064 goto out_resource;
2065 WRITE32(aclsupport ?
2066 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2067 }
2068 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
2069 if ((buflen -= 4) < 0)
2070 goto out_resource;
2071 WRITE32(1);
2072 }
2073 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
2074 if ((buflen -= 4) < 0)
2075 goto out_resource;
2076 WRITE32(1);
2077 }
2078 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
2079 if ((buflen -= 4) < 0)
2080 goto out_resource;
2081 WRITE32(1);
2082 }
2083 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2084 if ((buflen -= 4) < 0)
2085 goto out_resource;
2086 WRITE32(1);
2087 }
2088 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2089 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
2090 if (buflen < 0)
2091 goto out_resource;
2092 WRITE32(fhp->fh_handle.fh_size);
2093 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
2094 }
2095 if (bmval0 & FATTR4_WORD0_FILEID) {
2096 if ((buflen -= 8) < 0)
2097 goto out_resource;
2098 WRITE64(stat.ino);
2099 }
2100 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2101 if ((buflen -= 8) < 0)
2102 goto out_resource;
2103 WRITE64((u64) statfs.f_ffree);
2104 }
2105 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2106 if ((buflen -= 8) < 0)
2107 goto out_resource;
2108 WRITE64((u64) statfs.f_ffree);
2109 }
2110 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2111 if ((buflen -= 8) < 0)
2112 goto out_resource;
2113 WRITE64((u64) statfs.f_files);
2114 }
2115 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2116 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
2117 if (status == nfserr_resource)
2118 goto out_resource;
2119 if (status)
2120 goto out;
2121 }
2122 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2123 if ((buflen -= 4) < 0)
2124 goto out_resource;
2125 WRITE32(1);
2126 }
2127 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2128 if ((buflen -= 8) < 0)
2129 goto out_resource;
2130 WRITE64(~(u64)0);
2131 }
2132 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2133 if ((buflen -= 4) < 0)
2134 goto out_resource;
2135 WRITE32(255);
2136 }
2137 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2138 if ((buflen -= 4) < 0)
2139 goto out_resource;
2140 WRITE32(statfs.f_namelen);
2141 }
2142 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2143 if ((buflen -= 8) < 0)
2144 goto out_resource;
2145 WRITE64((u64) svc_max_payload(rqstp));
2146 }
2147 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2148 if ((buflen -= 8) < 0)
2149 goto out_resource;
2150 WRITE64((u64) svc_max_payload(rqstp));
2151 }
2152 if (bmval1 & FATTR4_WORD1_MODE) {
2153 if ((buflen -= 4) < 0)
2154 goto out_resource;
2155 WRITE32(stat.mode & S_IALLUGO);
2156 }
2157 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2158 if ((buflen -= 4) < 0)
2159 goto out_resource;
2160 WRITE32(1);
2161 }
2162 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2163 if ((buflen -= 4) < 0)
2164 goto out_resource;
2165 WRITE32(stat.nlink);
2166 }
2167 if (bmval1 & FATTR4_WORD1_OWNER) {
2168 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
2169 if (status == nfserr_resource)
2170 goto out_resource;
2171 if (status)
2172 goto out;
2173 }
2174 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2175 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
2176 if (status == nfserr_resource)
2177 goto out_resource;
2178 if (status)
2179 goto out;
2180 }
2181 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2182 if ((buflen -= 8) < 0)
2183 goto out_resource;
2184 WRITE32((u32) MAJOR(stat.rdev));
2185 WRITE32((u32) MINOR(stat.rdev));
2186 }
2187 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2188 if ((buflen -= 8) < 0)
2189 goto out_resource;
2190 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2191 WRITE64(dummy64);
2192 }
2193 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2194 if ((buflen -= 8) < 0)
2195 goto out_resource;
2196 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2197 WRITE64(dummy64);
2198 }
2199 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2200 if ((buflen -= 8) < 0)
2201 goto out_resource;
2202 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2203 WRITE64(dummy64);
2204 }
2205 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2206 if ((buflen -= 8) < 0)
2207 goto out_resource;
2208 dummy64 = (u64)stat.blocks << 9;
2209 WRITE64(dummy64);
2210 }
2211 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2212 if ((buflen -= 12) < 0)
2213 goto out_resource;
2214 WRITE32(0);
2215 WRITE32(stat.atime.tv_sec);
2216 WRITE32(stat.atime.tv_nsec);
2217 }
2218 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2219 if ((buflen -= 12) < 0)
2220 goto out_resource;
2221 WRITE32(0);
2222 WRITE32(1);
2223 WRITE32(0);
2224 }
2225 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2226 if ((buflen -= 12) < 0)
2227 goto out_resource;
2228 WRITE32(0);
2229 WRITE32(stat.ctime.tv_sec);
2230 WRITE32(stat.ctime.tv_nsec);
2231 }
2232 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2233 if ((buflen -= 12) < 0)
2234 goto out_resource;
2235 WRITE32(0);
2236 WRITE32(stat.mtime.tv_sec);
2237 WRITE32(stat.mtime.tv_nsec);
2238 }
2239 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
2240 if ((buflen -= 8) < 0)
2241 goto out_resource;
2242 /*
2243 * Get parent's attributes if not ignoring crossmount
2244 * and this is the root of a cross-mounted filesystem.
2245 */
2246 if (ignore_crossmnt == 0 &&
2247 dentry == exp->ex_path.mnt->mnt_root) {
2248 struct path path = exp->ex_path;
2249 path_get(&path);
2250 while (follow_up(&path)) {
2251 if (path.dentry != path.mnt->mnt_root)
2252 break;
2253 }
2254 err = vfs_getattr(path.mnt, path.dentry, &stat);
2255 path_put(&path);
2256 if (err)
2257 goto out_nfserr;
2258 }
2259 WRITE64(stat.ino);
2260 }
2261 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2262 WRITE32(3);
2263 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2264 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2265 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2266 }
2267
2268 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2269 *countp = p - buffer;
2270 status = nfs_ok;
2271
2272out:
2273 kfree(acl);
2274 if (fhp == &tempfh)
2275 fh_put(&tempfh);
2276 return status;
2277out_nfserr:
2278 status = nfserrno(err);
2279 goto out;
2280out_resource:
2281 *countp = 0;
2282 status = nfserr_resource;
2283 goto out;
2284out_serverfault:
2285 status = nfserr_serverfault;
2286 goto out;
2287}
2288
2289static inline int attributes_need_mount(u32 *bmval)
2290{
2291 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2292 return 1;
2293 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2294 return 1;
2295 return 0;
2296}
2297
2298static __be32
2299nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2300 const char *name, int namlen, __be32 *p, int *buflen)
2301{
2302 struct svc_export *exp = cd->rd_fhp->fh_export;
2303 struct dentry *dentry;
2304 __be32 nfserr;
2305 int ignore_crossmnt = 0;
2306
2307 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2308 if (IS_ERR(dentry))
2309 return nfserrno(PTR_ERR(dentry));
2310 if (!dentry->d_inode) {
2311 /*
2312 * nfsd_buffered_readdir drops the i_mutex between
2313 * readdir and calling this callback, leaving a window
2314 * where this directory entry could have gone away.
2315 */
2316 dput(dentry);
2317 return nfserr_noent;
2318 }
2319
2320 exp_get(exp);
2321 /*
2322 * In the case of a mountpoint, the client may be asking for
2323 * attributes that are only properties of the underlying filesystem
2324 * as opposed to the cross-mounted file system. In such a case,
2325 * we will not follow the cross mount and will fill the attribtutes
2326 * directly from the mountpoint dentry.
2327 */
2328 if (nfsd_mountpoint(dentry, exp)) {
2329 int err;
2330
2331 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2332 && !attributes_need_mount(cd->rd_bmval)) {
2333 ignore_crossmnt = 1;
2334 goto out_encode;
2335 }
2336 /*
2337 * Why the heck aren't we just using nfsd_lookup??
2338 * Different "."/".." handling? Something else?
2339 * At least, add a comment here to explain....
2340 */
2341 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2342 if (err) {
2343 nfserr = nfserrno(err);
2344 goto out_put;
2345 }
2346 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2347 if (nfserr)
2348 goto out_put;
2349
2350 }
2351out_encode:
2352 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
2353 cd->rd_rqstp, ignore_crossmnt);
2354out_put:
2355 dput(dentry);
2356 exp_put(exp);
2357 return nfserr;
2358}
2359
2360static __be32 *
2361nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
2362{
2363 __be32 *attrlenp;
2364
2365 if (buflen < 6)
2366 return NULL;
2367 *p++ = htonl(2);
2368 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2369 *p++ = htonl(0); /* bmval1 */
2370
2371 attrlenp = p++;
2372 *p++ = nfserr; /* no htonl */
2373 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2374 return p;
2375}
2376
2377static int
2378nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2379 loff_t offset, u64 ino, unsigned int d_type)
2380{
2381 struct readdir_cd *ccd = ccdv;
2382 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2383 int buflen;
2384 __be32 *p = cd->buffer;
2385 __be32 *cookiep;
2386 __be32 nfserr = nfserr_toosmall;
2387
2388 /* In nfsv4, "." and ".." never make it onto the wire.. */
2389 if (name && isdotent(name, namlen)) {
2390 cd->common.err = nfs_ok;
2391 return 0;
2392 }
2393
2394 if (cd->offset)
2395 xdr_encode_hyper(cd->offset, (u64) offset);
2396
2397 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2398 if (buflen < 0)
2399 goto fail;
2400
2401 *p++ = xdr_one; /* mark entry present */
2402 cookiep = p;
2403 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2404 p = xdr_encode_array(p, name, namlen); /* name length & name */
2405
2406 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
2407 switch (nfserr) {
2408 case nfs_ok:
2409 p += buflen;
2410 break;
2411 case nfserr_resource:
2412 nfserr = nfserr_toosmall;
2413 goto fail;
2414 case nfserr_noent:
2415 goto skip_entry;
2416 default:
2417 /*
2418 * If the client requested the RDATTR_ERROR attribute,
2419 * we stuff the error code into this attribute
2420 * and continue. If this attribute was not requested,
2421 * then in accordance with the spec, we fail the
2422 * entire READDIR operation(!)
2423 */
2424 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2425 goto fail;
2426 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
2427 if (p == NULL) {
2428 nfserr = nfserr_toosmall;
2429 goto fail;
2430 }
2431 }
2432 cd->buflen -= (p - cd->buffer);
2433 cd->buffer = p;
2434 cd->offset = cookiep;
2435skip_entry:
2436 cd->common.err = nfs_ok;
2437 return 0;
2438fail:
2439 cd->common.err = nfserr;
2440 return -EINVAL;
2441}
2442
2443static void
2444nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2445{
2446 __be32 *p;
2447
2448 RESERVE_SPACE(sizeof(stateid_t));
2449 WRITE32(sid->si_generation);
2450 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2451 ADJUST_ARGS();
2452}
2453
2454static __be32
2455nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
2456{
2457 __be32 *p;
2458
2459 if (!nfserr) {
2460 RESERVE_SPACE(8);
2461 WRITE32(access->ac_supported);
2462 WRITE32(access->ac_resp_access);
2463 ADJUST_ARGS();
2464 }
2465 return nfserr;
2466}
2467
2468static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
2469{
2470 __be32 *p;
2471
2472 if (!nfserr) {
2473 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 8);
2474 WRITEMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
2475 WRITE32(bcts->dir);
2476 /* XXX: ? */
2477 WRITE32(0);
2478 ADJUST_ARGS();
2479 }
2480 return nfserr;
2481}
2482
2483static __be32
2484nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
2485{
2486 ENCODE_SEQID_OP_HEAD;
2487
2488 if (!nfserr)
2489 nfsd4_encode_stateid(resp, &close->cl_stateid);
2490
2491 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
2492 return nfserr;
2493}
2494
2495
2496static __be32
2497nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
2498{
2499 __be32 *p;
2500
2501 if (!nfserr) {
2502 RESERVE_SPACE(8);
2503 WRITEMEM(commit->co_verf.data, 8);
2504 ADJUST_ARGS();
2505 }
2506 return nfserr;
2507}
2508
2509static __be32
2510nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
2511{
2512 __be32 *p;
2513
2514 if (!nfserr) {
2515 RESERVE_SPACE(32);
2516 write_cinfo(&p, &create->cr_cinfo);
2517 WRITE32(2);
2518 WRITE32(create->cr_bmval[0]);
2519 WRITE32(create->cr_bmval[1]);
2520 ADJUST_ARGS();
2521 }
2522 return nfserr;
2523}
2524
2525static __be32
2526nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
2527{
2528 struct svc_fh *fhp = getattr->ga_fhp;
2529 int buflen;
2530
2531 if (nfserr)
2532 return nfserr;
2533
2534 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2535 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2536 resp->p, &buflen, getattr->ga_bmval,
2537 resp->rqstp, 0);
2538 if (!nfserr)
2539 resp->p += buflen;
2540 return nfserr;
2541}
2542
2543static __be32
2544nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
2545{
2546 struct svc_fh *fhp = *fhpp;
2547 unsigned int len;
2548 __be32 *p;
2549
2550 if (!nfserr) {
2551 len = fhp->fh_handle.fh_size;
2552 RESERVE_SPACE(len + 4);
2553 WRITE32(len);
2554 WRITEMEM(&fhp->fh_handle.fh_base, len);
2555 ADJUST_ARGS();
2556 }
2557 return nfserr;
2558}
2559
2560/*
2561* Including all fields other than the name, a LOCK4denied structure requires
2562* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2563*/
2564static void
2565nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2566{
2567 __be32 *p;
2568
2569 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
2570 WRITE64(ld->ld_start);
2571 WRITE64(ld->ld_length);
2572 WRITE32(ld->ld_type);
2573 if (ld->ld_sop) {
2574 WRITEMEM(&ld->ld_clientid, 8);
2575 WRITE32(ld->ld_sop->so_owner.len);
2576 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
2577 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
2578 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2579 WRITE64((u64)0); /* clientid */
2580 WRITE32(0); /* length of owner name */
2581 }
2582 ADJUST_ARGS();
2583}
2584
2585static __be32
2586nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
2587{
2588 ENCODE_SEQID_OP_HEAD;
2589
2590 if (!nfserr)
2591 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2592 else if (nfserr == nfserr_denied)
2593 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2594
2595 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
2596 return nfserr;
2597}
2598
2599static __be32
2600nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
2601{
2602 if (nfserr == nfserr_denied)
2603 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
2604 return nfserr;
2605}
2606
2607static __be32
2608nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
2609{
2610 ENCODE_SEQID_OP_HEAD;
2611
2612 if (!nfserr)
2613 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2614
2615 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
2616 return nfserr;
2617}
2618
2619
2620static __be32
2621nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
2622{
2623 __be32 *p;
2624
2625 if (!nfserr) {
2626 RESERVE_SPACE(20);
2627 write_cinfo(&p, &link->li_cinfo);
2628 ADJUST_ARGS();
2629 }
2630 return nfserr;
2631}
2632
2633
2634static __be32
2635nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
2636{
2637 __be32 *p;
2638 ENCODE_SEQID_OP_HEAD;
2639
2640 if (nfserr)
2641 goto out;
2642
2643 nfsd4_encode_stateid(resp, &open->op_stateid);
2644 RESERVE_SPACE(40);
2645 write_cinfo(&p, &open->op_cinfo);
2646 WRITE32(open->op_rflags);
2647 WRITE32(2);
2648 WRITE32(open->op_bmval[0]);
2649 WRITE32(open->op_bmval[1]);
2650 WRITE32(open->op_delegate_type);
2651 ADJUST_ARGS();
2652
2653 switch (open->op_delegate_type) {
2654 case NFS4_OPEN_DELEGATE_NONE:
2655 break;
2656 case NFS4_OPEN_DELEGATE_READ:
2657 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2658 RESERVE_SPACE(20);
2659 WRITE32(open->op_recall);
2660
2661 /*
2662 * TODO: ACE's in delegations
2663 */
2664 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2665 WRITE32(0);
2666 WRITE32(0);
2667 WRITE32(0); /* XXX: is NULL principal ok? */
2668 ADJUST_ARGS();
2669 break;
2670 case NFS4_OPEN_DELEGATE_WRITE:
2671 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2672 RESERVE_SPACE(32);
2673 WRITE32(0);
2674
2675 /*
2676 * TODO: space_limit's in delegations
2677 */
2678 WRITE32(NFS4_LIMIT_SIZE);
2679 WRITE32(~(u32)0);
2680 WRITE32(~(u32)0);
2681
2682 /*
2683 * TODO: ACE's in delegations
2684 */
2685 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2686 WRITE32(0);
2687 WRITE32(0);
2688 WRITE32(0); /* XXX: is NULL principal ok? */
2689 ADJUST_ARGS();
2690 break;
2691 default:
2692 BUG();
2693 }
2694 /* XXX save filehandle here */
2695out:
2696 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
2697 return nfserr;
2698}
2699
2700static __be32
2701nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
2702{
2703 ENCODE_SEQID_OP_HEAD;
2704
2705 if (!nfserr)
2706 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
2707
2708 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
2709 return nfserr;
2710}
2711
2712static __be32
2713nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
2714{
2715 ENCODE_SEQID_OP_HEAD;
2716
2717 if (!nfserr)
2718 nfsd4_encode_stateid(resp, &od->od_stateid);
2719
2720 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
2721 return nfserr;
2722}
2723
2724static __be32
2725nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
2726 struct nfsd4_read *read)
2727{
2728 u32 eof;
2729 int v, pn;
2730 unsigned long maxcount;
2731 long len;
2732 __be32 *p;
2733
2734 if (nfserr)
2735 return nfserr;
2736 if (resp->xbuf->page_len)
2737 return nfserr_resource;
2738
2739 RESERVE_SPACE(8); /* eof flag and byte count */
2740
2741 maxcount = svc_max_payload(resp->rqstp);
2742 if (maxcount > read->rd_length)
2743 maxcount = read->rd_length;
2744
2745 len = maxcount;
2746 v = 0;
2747 while (len > 0) {
2748 pn = resp->rqstp->rq_resused++;
2749 resp->rqstp->rq_vec[v].iov_base =
2750 page_address(resp->rqstp->rq_respages[pn]);
2751 resp->rqstp->rq_vec[v].iov_len =
2752 len < PAGE_SIZE ? len : PAGE_SIZE;
2753 v++;
2754 len -= PAGE_SIZE;
2755 }
2756 read->rd_vlen = v;
2757
2758 nfserr = nfsd_read_file(read->rd_rqstp, read->rd_fhp, read->rd_filp,
2759 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
2760 &maxcount);
2761
2762 if (nfserr == nfserr_symlink)
2763 nfserr = nfserr_inval;
2764 if (nfserr)
2765 return nfserr;
2766 eof = (read->rd_offset + maxcount >=
2767 read->rd_fhp->fh_dentry->d_inode->i_size);
2768
2769 WRITE32(eof);
2770 WRITE32(maxcount);
2771 ADJUST_ARGS();
2772 resp->xbuf->head[0].iov_len = (char*)p
2773 - (char*)resp->xbuf->head[0].iov_base;
2774 resp->xbuf->page_len = maxcount;
2775
2776 /* Use rest of head for padding and remaining ops: */
2777 resp->xbuf->tail[0].iov_base = p;
2778 resp->xbuf->tail[0].iov_len = 0;
2779 if (maxcount&3) {
2780 RESERVE_SPACE(4);
2781 WRITE32(0);
2782 resp->xbuf->tail[0].iov_base += maxcount&3;
2783 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2784 ADJUST_ARGS();
2785 }
2786 return 0;
2787}
2788
2789static __be32
2790nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
2791{
2792 int maxcount;
2793 char *page;
2794 __be32 *p;
2795
2796 if (nfserr)
2797 return nfserr;
2798 if (resp->xbuf->page_len)
2799 return nfserr_resource;
2800
2801 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2802
2803 maxcount = PAGE_SIZE;
2804 RESERVE_SPACE(4);
2805
2806 /*
2807 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2808 * if they would overflow the buffer. Is this kosher in NFSv4? If
2809 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2810 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2811 */
2812 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2813 if (nfserr == nfserr_isdir)
2814 return nfserr_inval;
2815 if (nfserr)
2816 return nfserr;
2817
2818 WRITE32(maxcount);
2819 ADJUST_ARGS();
2820 resp->xbuf->head[0].iov_len = (char*)p
2821 - (char*)resp->xbuf->head[0].iov_base;
2822 resp->xbuf->page_len = maxcount;
2823
2824 /* Use rest of head for padding and remaining ops: */
2825 resp->xbuf->tail[0].iov_base = p;
2826 resp->xbuf->tail[0].iov_len = 0;
2827 if (maxcount&3) {
2828 RESERVE_SPACE(4);
2829 WRITE32(0);
2830 resp->xbuf->tail[0].iov_base += maxcount&3;
2831 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2832 ADJUST_ARGS();
2833 }
2834 return 0;
2835}
2836
2837static __be32
2838nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
2839{
2840 int maxcount;
2841 loff_t offset;
2842 __be32 *page, *savep, *tailbase;
2843 __be32 *p;
2844
2845 if (nfserr)
2846 return nfserr;
2847 if (resp->xbuf->page_len)
2848 return nfserr_resource;
2849
2850 RESERVE_SPACE(8); /* verifier */
2851 savep = p;
2852
2853 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2854 WRITE32(0);
2855 WRITE32(0);
2856 ADJUST_ARGS();
2857 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2858 tailbase = p;
2859
2860 maxcount = PAGE_SIZE;
2861 if (maxcount > readdir->rd_maxcount)
2862 maxcount = readdir->rd_maxcount;
2863
2864 /*
2865 * Convert from bytes to words, account for the two words already
2866 * written, make sure to leave two words at the end for the next
2867 * pointer and eof field.
2868 */
2869 maxcount = (maxcount >> 2) - 4;
2870 if (maxcount < 0) {
2871 nfserr = nfserr_toosmall;
2872 goto err_no_verf;
2873 }
2874
2875 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2876 readdir->common.err = 0;
2877 readdir->buflen = maxcount;
2878 readdir->buffer = page;
2879 readdir->offset = NULL;
2880
2881 offset = readdir->rd_cookie;
2882 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2883 &offset,
2884 &readdir->common, nfsd4_encode_dirent);
2885 if (nfserr == nfs_ok &&
2886 readdir->common.err == nfserr_toosmall &&
2887 readdir->buffer == page)
2888 nfserr = nfserr_toosmall;
2889 if (nfserr == nfserr_symlink)
2890 nfserr = nfserr_notdir;
2891 if (nfserr)
2892 goto err_no_verf;
2893
2894 if (readdir->offset)
2895 xdr_encode_hyper(readdir->offset, offset);
2896
2897 p = readdir->buffer;
2898 *p++ = 0; /* no more entries */
2899 *p++ = htonl(readdir->common.err == nfserr_eof);
2900 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
2901 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2902
2903 /* Use rest of head for padding and remaining ops: */
2904 resp->xbuf->tail[0].iov_base = tailbase;
2905 resp->xbuf->tail[0].iov_len = 0;
2906 resp->p = resp->xbuf->tail[0].iov_base;
2907 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
2908
2909 return 0;
2910err_no_verf:
2911 p = savep;
2912 ADJUST_ARGS();
2913 return nfserr;
2914}
2915
2916static __be32
2917nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
2918{
2919 __be32 *p;
2920
2921 if (!nfserr) {
2922 RESERVE_SPACE(20);
2923 write_cinfo(&p, &remove->rm_cinfo);
2924 ADJUST_ARGS();
2925 }
2926 return nfserr;
2927}
2928
2929static __be32
2930nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
2931{
2932 __be32 *p;
2933
2934 if (!nfserr) {
2935 RESERVE_SPACE(40);
2936 write_cinfo(&p, &rename->rn_sinfo);
2937 write_cinfo(&p, &rename->rn_tinfo);
2938 ADJUST_ARGS();
2939 }
2940 return nfserr;
2941}
2942
2943static __be32
2944nfsd4_do_encode_secinfo(struct nfsd4_compoundres *resp,
2945 __be32 nfserr,struct svc_export *exp)
2946{
2947 int i = 0;
2948 u32 nflavs;
2949 struct exp_flavor_info *flavs;
2950 struct exp_flavor_info def_flavs[2];
2951 __be32 *p;
2952
2953 if (nfserr)
2954 goto out;
2955 if (exp->ex_nflavors) {
2956 flavs = exp->ex_flavors;
2957 nflavs = exp->ex_nflavors;
2958 } else { /* Handling of some defaults in absence of real secinfo: */
2959 flavs = def_flavs;
2960 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
2961 nflavs = 2;
2962 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
2963 flavs[1].pseudoflavor = RPC_AUTH_NULL;
2964 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
2965 nflavs = 1;
2966 flavs[0].pseudoflavor
2967 = svcauth_gss_flavor(exp->ex_client);
2968 } else {
2969 nflavs = 1;
2970 flavs[0].pseudoflavor
2971 = exp->ex_client->flavour->flavour;
2972 }
2973 }
2974
2975 RESERVE_SPACE(4);
2976 WRITE32(nflavs);
2977 ADJUST_ARGS();
2978 for (i = 0; i < nflavs; i++) {
2979 u32 flav = flavs[i].pseudoflavor;
2980 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
2981
2982 if (gm) {
2983 RESERVE_SPACE(4);
2984 WRITE32(RPC_AUTH_GSS);
2985 ADJUST_ARGS();
2986 RESERVE_SPACE(4 + gm->gm_oid.len);
2987 WRITE32(gm->gm_oid.len);
2988 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
2989 ADJUST_ARGS();
2990 RESERVE_SPACE(4);
2991 WRITE32(0); /* qop */
2992 ADJUST_ARGS();
2993 RESERVE_SPACE(4);
2994 WRITE32(gss_pseudoflavor_to_service(gm, flav));
2995 ADJUST_ARGS();
2996 gss_mech_put(gm);
2997 } else {
2998 RESERVE_SPACE(4);
2999 WRITE32(flav);
3000 ADJUST_ARGS();
3001 }
3002 }
3003out:
3004 if (exp)
3005 exp_put(exp);
3006 return nfserr;
3007}
3008
3009static __be32
3010nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3011 struct nfsd4_secinfo *secinfo)
3012{
3013 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->si_exp);
3014}
3015
3016static __be32
3017nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3018 struct nfsd4_secinfo_no_name *secinfo)
3019{
3020 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->sin_exp);
3021}
3022
3023/*
3024 * The SETATTR encode routine is special -- it always encodes a bitmap,
3025 * regardless of the error status.
3026 */
3027static __be32
3028nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
3029{
3030 __be32 *p;
3031
3032 RESERVE_SPACE(12);
3033 if (nfserr) {
3034 WRITE32(2);
3035 WRITE32(0);
3036 WRITE32(0);
3037 }
3038 else {
3039 WRITE32(2);
3040 WRITE32(setattr->sa_bmval[0]);
3041 WRITE32(setattr->sa_bmval[1]);
3042 }
3043 ADJUST_ARGS();
3044 return nfserr;
3045}
3046
3047static __be32
3048nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
3049{
3050 __be32 *p;
3051
3052 if (!nfserr) {
3053 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
3054 WRITEMEM(&scd->se_clientid, 8);
3055 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
3056 ADJUST_ARGS();
3057 }
3058 else if (nfserr == nfserr_clid_inuse) {
3059 RESERVE_SPACE(8);
3060 WRITE32(0);
3061 WRITE32(0);
3062 ADJUST_ARGS();
3063 }
3064 return nfserr;
3065}
3066
3067static __be32
3068nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
3069{
3070 __be32 *p;
3071
3072 if (!nfserr) {
3073 RESERVE_SPACE(16);
3074 WRITE32(write->wr_bytes_written);
3075 WRITE32(write->wr_how_written);
3076 WRITEMEM(write->wr_verifier.data, 8);
3077 ADJUST_ARGS();
3078 }
3079 return nfserr;
3080}
3081
3082static __be32
3083nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr,
3084 struct nfsd4_exchange_id *exid)
3085{
3086 __be32 *p;
3087 char *major_id;
3088 char *server_scope;
3089 int major_id_sz;
3090 int server_scope_sz;
3091 uint64_t minor_id = 0;
3092
3093 if (nfserr)
3094 return nfserr;
3095
3096 major_id = utsname()->nodename;
3097 major_id_sz = strlen(major_id);
3098 server_scope = utsname()->nodename;
3099 server_scope_sz = strlen(server_scope);
3100
3101 RESERVE_SPACE(
3102 8 /* eir_clientid */ +
3103 4 /* eir_sequenceid */ +
3104 4 /* eir_flags */ +
3105 4 /* spr_how (SP4_NONE) */ +
3106 8 /* so_minor_id */ +
3107 4 /* so_major_id.len */ +
3108 (XDR_QUADLEN(major_id_sz) * 4) +
3109 4 /* eir_server_scope.len */ +
3110 (XDR_QUADLEN(server_scope_sz) * 4) +
3111 4 /* eir_server_impl_id.count (0) */);
3112
3113 WRITEMEM(&exid->clientid, 8);
3114 WRITE32(exid->seqid);
3115 WRITE32(exid->flags);
3116
3117 /* state_protect4_r. Currently only support SP4_NONE */
3118 BUG_ON(exid->spa_how != SP4_NONE);
3119 WRITE32(exid->spa_how);
3120
3121 /* The server_owner struct */
3122 WRITE64(minor_id); /* Minor id */
3123 /* major id */
3124 WRITE32(major_id_sz);
3125 WRITEMEM(major_id, major_id_sz);
3126
3127 /* Server scope */
3128 WRITE32(server_scope_sz);
3129 WRITEMEM(server_scope, server_scope_sz);
3130
3131 /* Implementation id */
3132 WRITE32(0); /* zero length nfs_impl_id4 array */
3133 ADJUST_ARGS();
3134 return 0;
3135}
3136
3137static __be32
3138nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr,
3139 struct nfsd4_create_session *sess)
3140{
3141 __be32 *p;
3142
3143 if (nfserr)
3144 return nfserr;
3145
3146 RESERVE_SPACE(24);
3147 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3148 WRITE32(sess->seqid);
3149 WRITE32(sess->flags);
3150 ADJUST_ARGS();
3151
3152 RESERVE_SPACE(28);
3153 WRITE32(0); /* headerpadsz */
3154 WRITE32(sess->fore_channel.maxreq_sz);
3155 WRITE32(sess->fore_channel.maxresp_sz);
3156 WRITE32(sess->fore_channel.maxresp_cached);
3157 WRITE32(sess->fore_channel.maxops);
3158 WRITE32(sess->fore_channel.maxreqs);
3159 WRITE32(sess->fore_channel.nr_rdma_attrs);
3160 ADJUST_ARGS();
3161
3162 if (sess->fore_channel.nr_rdma_attrs) {
3163 RESERVE_SPACE(4);
3164 WRITE32(sess->fore_channel.rdma_attrs);
3165 ADJUST_ARGS();
3166 }
3167
3168 RESERVE_SPACE(28);
3169 WRITE32(0); /* headerpadsz */
3170 WRITE32(sess->back_channel.maxreq_sz);
3171 WRITE32(sess->back_channel.maxresp_sz);
3172 WRITE32(sess->back_channel.maxresp_cached);
3173 WRITE32(sess->back_channel.maxops);
3174 WRITE32(sess->back_channel.maxreqs);
3175 WRITE32(sess->back_channel.nr_rdma_attrs);
3176 ADJUST_ARGS();
3177
3178 if (sess->back_channel.nr_rdma_attrs) {
3179 RESERVE_SPACE(4);
3180 WRITE32(sess->back_channel.rdma_attrs);
3181 ADJUST_ARGS();
3182 }
3183 return 0;
3184}
3185
3186static __be32
3187nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr,
3188 struct nfsd4_destroy_session *destroy_session)
3189{
3190 return nfserr;
3191}
3192
3193static __be32
3194nfsd4_encode_free_stateid(struct nfsd4_compoundres *resp, int nfserr,
3195 struct nfsd4_free_stateid *free_stateid)
3196{
3197 __be32 *p;
3198
3199 if (nfserr)
3200 return nfserr;
3201
3202 RESERVE_SPACE(4);
3203 WRITE32(nfserr);
3204 ADJUST_ARGS();
3205 return nfserr;
3206}
3207
3208static __be32
3209nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr,
3210 struct nfsd4_sequence *seq)
3211{
3212 __be32 *p;
3213
3214 if (nfserr)
3215 return nfserr;
3216
3217 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
3218 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3219 WRITE32(seq->seqid);
3220 WRITE32(seq->slotid);
3221 WRITE32(seq->maxslots);
3222 /* For now: target_maxslots = maxslots */
3223 WRITE32(seq->maxslots);
3224 WRITE32(seq->status_flags);
3225
3226 ADJUST_ARGS();
3227 resp->cstate.datap = p; /* DRC cache data pointer */
3228 return 0;
3229}
3230
3231__be32
3232nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, int nfserr,
3233 struct nfsd4_test_stateid *test_stateid)
3234{
3235 struct nfsd4_compoundargs *argp;
3236 stateid_t si;
3237 __be32 *p;
3238 int i;
3239 int valid;
3240
3241 restore_buf(test_stateid->ts_saved_args, &test_stateid->ts_savedp);
3242 argp = test_stateid->ts_saved_args;
3243
3244 RESERVE_SPACE(4);
3245 *p++ = htonl(test_stateid->ts_num_ids);
3246 resp->p = p;
3247
3248 nfs4_lock_state();
3249 for (i = 0; i < test_stateid->ts_num_ids; i++) {
3250 nfsd4_decode_stateid(argp, &si);
3251 valid = nfs4_validate_stateid(&si, test_stateid->ts_has_session);
3252 RESERVE_SPACE(4);
3253 *p++ = htonl(valid);
3254 resp->p = p;
3255 }
3256 nfs4_unlock_state();
3257
3258 return nfserr;
3259}
3260
3261static __be32
3262nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3263{
3264 return nfserr;
3265}
3266
3267typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3268
3269/*
3270 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3271 * since we don't need to filter out obsolete ops as this is
3272 * done in the decoding phase.
3273 */
3274static nfsd4_enc nfsd4_enc_ops[] = {
3275 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3276 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3277 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3278 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3279 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3280 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3281 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3282 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3283 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3284 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3285 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3286 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3287 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3288 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3289 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3290 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
3291 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
3292 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3293 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3294 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3295 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3296 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3297 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3298 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3299 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3300 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3301 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3302 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3303 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3304 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3305 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3306 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3307 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3308 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3309 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3310 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3311 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
3312
3313 /* NFSv4.1 operations */
3314 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
3315 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
3316 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3317 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3318 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
3319 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_free_stateid,
3320 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3321 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3322 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3323 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3324 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3325 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3326 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
3327 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3328 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
3329 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
3330 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3331 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3332 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
3333};
3334
3335/*
3336 * Calculate the total amount of memory that the compound response has taken
3337 * after encoding the current operation.
3338 *
3339 * pad: add on 8 bytes for the next operation's op_code and status so that
3340 * there is room to cache a failure on the next operation.
3341 *
3342 * Compare this length to the session se_fmaxresp_cached.
3343 *
3344 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
3345 * will be at least a page and will therefore hold the xdr_buf head.
3346 */
3347static int nfsd4_check_drc_limit(struct nfsd4_compoundres *resp)
3348{
3349 int status = 0;
3350 struct xdr_buf *xb = &resp->rqstp->rq_res;
3351 struct nfsd4_compoundargs *args = resp->rqstp->rq_argp;
3352 struct nfsd4_session *session = NULL;
3353 struct nfsd4_slot *slot = resp->cstate.slot;
3354 u32 length, tlen = 0, pad = 8;
3355
3356 if (!nfsd4_has_session(&resp->cstate))
3357 return status;
3358
3359 session = resp->cstate.session;
3360 if (session == NULL || slot->sl_cachethis == 0)
3361 return status;
3362
3363 if (resp->opcnt >= args->opcnt)
3364 pad = 0; /* this is the last operation */
3365
3366 if (xb->page_len == 0) {
3367 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad;
3368 } else {
3369 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
3370 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base;
3371
3372 length = xb->head[0].iov_len + xb->page_len + tlen + pad;
3373 }
3374 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
3375 length, xb->page_len, tlen, pad);
3376
3377 if (length <= session->se_fchannel.maxresp_cached)
3378 return status;
3379 else
3380 return nfserr_rep_too_big_to_cache;
3381}
3382
3383void
3384nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3385{
3386 __be32 *statp;
3387 __be32 *p;
3388
3389 RESERVE_SPACE(8);
3390 WRITE32(op->opnum);
3391 statp = p++; /* to be backfilled at the end */
3392 ADJUST_ARGS();
3393
3394 if (op->opnum == OP_ILLEGAL)
3395 goto status;
3396 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3397 !nfsd4_enc_ops[op->opnum]);
3398 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
3399 /* nfsd4_check_drc_limit guarantees enough room for error status */
3400 if (!op->status && nfsd4_check_drc_limit(resp))
3401 op->status = nfserr_rep_too_big_to_cache;
3402status:
3403 /*
3404 * Note: We write the status directly, instead of using WRITE32(),
3405 * since it is already in network byte order.
3406 */
3407 *statp = op->status;
3408}
3409
3410/*
3411 * Encode the reply stored in the stateowner reply cache
3412 *
3413 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3414 * previously sent already encoded operation.
3415 *
3416 * called with nfs4_lock_state() held
3417 */
3418void
3419nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3420{
3421 __be32 *p;
3422 struct nfs4_replay *rp = op->replay;
3423
3424 BUG_ON(!rp);
3425
3426 RESERVE_SPACE(8);
3427 WRITE32(op->opnum);
3428 *p++ = rp->rp_status; /* already xdr'ed */
3429 ADJUST_ARGS();
3430
3431 RESERVE_SPACE(rp->rp_buflen);
3432 WRITEMEM(rp->rp_buf, rp->rp_buflen);
3433 ADJUST_ARGS();
3434}
3435
3436int
3437nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
3438{
3439 return xdr_ressize_check(rqstp, p);
3440}
3441
3442int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
3443{
3444 struct svc_rqst *rqstp = rq;
3445 struct nfsd4_compoundargs *args = rqstp->rq_argp;
3446
3447 if (args->ops != args->iops) {
3448 kfree(args->ops);
3449 args->ops = args->iops;
3450 }
3451 kfree(args->tmpp);
3452 args->tmpp = NULL;
3453 while (args->to_free) {
3454 struct tmpbuf *tb = args->to_free;
3455 args->to_free = tb->next;
3456 tb->release(tb->buf);
3457 kfree(tb);
3458 }
3459 return 1;
3460}
3461
3462int
3463nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
3464{
3465 args->p = p;
3466 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3467 args->pagelist = rqstp->rq_arg.pages;
3468 args->pagelen = rqstp->rq_arg.page_len;
3469 args->tmpp = NULL;
3470 args->to_free = NULL;
3471 args->ops = args->iops;
3472 args->rqstp = rqstp;
3473
3474 return !nfsd4_decode_compound(args);
3475}
3476
3477int
3478nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
3479{
3480 /*
3481 * All that remains is to write the tag and operation count...
3482 */
3483 struct nfsd4_compound_state *cs = &resp->cstate;
3484 struct kvec *iov;
3485 p = resp->tagp;
3486 *p++ = htonl(resp->taglen);
3487 memcpy(p, resp->tag, resp->taglen);
3488 p += XDR_QUADLEN(resp->taglen);
3489 *p++ = htonl(resp->opcnt);
3490
3491 if (rqstp->rq_res.page_len)
3492 iov = &rqstp->rq_res.tail[0];
3493 else
3494 iov = &rqstp->rq_res.head[0];
3495 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3496 BUG_ON(iov->iov_len > PAGE_SIZE);
3497 if (nfsd4_has_session(cs)) {
3498 if (cs->status != nfserr_replay_cache) {
3499 nfsd4_store_cache_entry(resp);
3500 dprintk("%s: SET SLOT STATE TO AVAILABLE\n", __func__);
3501 cs->slot->sl_inuse = false;
3502 }
3503 /* Renew the clientid on success and on replay */
3504 release_session_client(cs->session);
3505 nfsd4_put_session(cs->session);
3506 }
3507 return 1;
3508}
3509
3510/*
3511 * Local variables:
3512 * c-basic-offset: 8
3513 * End:
3514 */