1
2
3
4
5
6
7
8
9#include <linux/param.h>
10#include <linux/time.h>
11#include <linux/mm.h>
12#include <linux/errno.h>
13#include <linux/string.h>
14#include <linux/in.h>
15#include <linux/pagemap.h>
16#include <linux/proc_fs.h>
17#include <linux/kdev_t.h>
18#include <linux/sunrpc/clnt.h>
19#include <linux/nfs.h>
20#include <linux/nfs3.h>
21#include <linux/nfs_fs.h>
22#include <linux/nfsacl.h>
23#include "internal.h"
24
25#define NFSDBG_FACILITY NFSDBG_XDR
26
27
28#define errno_NFSERR_IO EIO
29
30
31
32
33
34#define NFS3_fhandle_sz (1+16)
35#define NFS3_fh_sz (NFS3_fhandle_sz)
36#define NFS3_sattr_sz (15)
37#define NFS3_filename_sz (1+(NFS3_MAXNAMLEN>>2))
38#define NFS3_path_sz (1+(NFS3_MAXPATHLEN>>2))
39#define NFS3_fattr_sz (21)
40#define NFS3_cookieverf_sz (NFS3_COOKIEVERFSIZE>>2)
41#define NFS3_wcc_attr_sz (6)
42#define NFS3_pre_op_attr_sz (1+NFS3_wcc_attr_sz)
43#define NFS3_post_op_attr_sz (1+NFS3_fattr_sz)
44#define NFS3_wcc_data_sz (NFS3_pre_op_attr_sz+NFS3_post_op_attr_sz)
45#define NFS3_diropargs_sz (NFS3_fh_sz+NFS3_filename_sz)
46
47#define NFS3_getattrargs_sz (NFS3_fh_sz)
48#define NFS3_setattrargs_sz (NFS3_fh_sz+NFS3_sattr_sz+3)
49#define NFS3_lookupargs_sz (NFS3_fh_sz+NFS3_filename_sz)
50#define NFS3_accessargs_sz (NFS3_fh_sz+1)
51#define NFS3_readlinkargs_sz (NFS3_fh_sz)
52#define NFS3_readargs_sz (NFS3_fh_sz+3)
53#define NFS3_writeargs_sz (NFS3_fh_sz+5)
54#define NFS3_createargs_sz (NFS3_diropargs_sz+NFS3_sattr_sz)
55#define NFS3_mkdirargs_sz (NFS3_diropargs_sz+NFS3_sattr_sz)
56#define NFS3_symlinkargs_sz (NFS3_diropargs_sz+1+NFS3_sattr_sz)
57#define NFS3_mknodargs_sz (NFS3_diropargs_sz+2+NFS3_sattr_sz)
58#define NFS3_removeargs_sz (NFS3_fh_sz+NFS3_filename_sz)
59#define NFS3_renameargs_sz (NFS3_diropargs_sz+NFS3_diropargs_sz)
60#define NFS3_linkargs_sz (NFS3_fh_sz+NFS3_diropargs_sz)
61#define NFS3_readdirargs_sz (NFS3_fh_sz+NFS3_cookieverf_sz+3)
62#define NFS3_readdirplusargs_sz (NFS3_fh_sz+NFS3_cookieverf_sz+4)
63#define NFS3_commitargs_sz (NFS3_fh_sz+3)
64
65#define NFS3_getattrres_sz (1+NFS3_fattr_sz)
66#define NFS3_setattrres_sz (1+NFS3_wcc_data_sz)
67#define NFS3_removeres_sz (NFS3_setattrres_sz)
68#define NFS3_lookupres_sz (1+NFS3_fh_sz+(2 * NFS3_post_op_attr_sz))
69#define NFS3_accessres_sz (1+NFS3_post_op_attr_sz+1)
70#define NFS3_readlinkres_sz (1+NFS3_post_op_attr_sz+1)
71#define NFS3_readres_sz (1+NFS3_post_op_attr_sz+3)
72#define NFS3_writeres_sz (1+NFS3_wcc_data_sz+4)
73#define NFS3_createres_sz (1+NFS3_fh_sz+NFS3_post_op_attr_sz+NFS3_wcc_data_sz)
74#define NFS3_renameres_sz (1+(2 * NFS3_wcc_data_sz))
75#define NFS3_linkres_sz (1+NFS3_post_op_attr_sz+NFS3_wcc_data_sz)
76#define NFS3_readdirres_sz (1+NFS3_post_op_attr_sz+2)
77#define NFS3_fsstatres_sz (1+NFS3_post_op_attr_sz+13)
78#define NFS3_fsinfores_sz (1+NFS3_post_op_attr_sz+12)
79#define NFS3_pathconfres_sz (1+NFS3_post_op_attr_sz+6)
80#define NFS3_commitres_sz (1+NFS3_wcc_data_sz+2)
81
82#define ACL3_getaclargs_sz (NFS3_fh_sz+1)
83#define ACL3_setaclargs_sz (NFS3_fh_sz+1+ \
84 XDR_QUADLEN(NFS_ACL_INLINE_BUFSIZE))
85#define ACL3_getaclres_sz (1+NFS3_post_op_attr_sz+1+ \
86 XDR_QUADLEN(NFS_ACL_INLINE_BUFSIZE))
87#define ACL3_setaclres_sz (1+NFS3_post_op_attr_sz)
88
89
90
91
92static const umode_t nfs_type2fmt[] = {
93 [NF3BAD] = 0,
94 [NF3REG] = S_IFREG,
95 [NF3DIR] = S_IFDIR,
96 [NF3BLK] = S_IFBLK,
97 [NF3CHR] = S_IFCHR,
98 [NF3LNK] = S_IFLNK,
99 [NF3SOCK] = S_IFSOCK,
100 [NF3FIFO] = S_IFIFO,
101};
102
103
104
105
106
107static void prepare_reply_buffer(struct rpc_rqst *req, struct page **pages,
108 unsigned int base, unsigned int len,
109 unsigned int bufsize)
110{
111 struct rpc_auth *auth = req->rq_cred->cr_auth;
112 unsigned int replen;
113
114 replen = RPC_REPHDRSIZE + auth->au_rslack + bufsize;
115 xdr_inline_pages(&req->rq_rcv_buf, replen << 2, pages, base, len);
116}
117
118
119
120
121static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
122{
123 dprintk("NFS: %s prematurely hit the end of our receive buffer. "
124 "Remaining buffer length is %tu words.\n",
125 func, xdr->end - xdr->p);
126}
127
128
129
130
131
132
133
134
135
136
137
138
139
140static void encode_uint32(struct xdr_stream *xdr, u32 value)
141{
142 __be32 *p = xdr_reserve_space(xdr, 4);
143 *p = cpu_to_be32(value);
144}
145
146static int decode_uint32(struct xdr_stream *xdr, u32 *value)
147{
148 __be32 *p;
149
150 p = xdr_inline_decode(xdr, 4);
151 if (unlikely(p == NULL))
152 goto out_overflow;
153 *value = be32_to_cpup(p);
154 return 0;
155out_overflow:
156 print_overflow_msg(__func__, xdr);
157 return -EIO;
158}
159
160static int decode_uint64(struct xdr_stream *xdr, u64 *value)
161{
162 __be32 *p;
163
164 p = xdr_inline_decode(xdr, 8);
165 if (unlikely(p == NULL))
166 goto out_overflow;
167 xdr_decode_hyper(p, value);
168 return 0;
169out_overflow:
170 print_overflow_msg(__func__, xdr);
171 return -EIO;
172}
173
174
175
176
177
178
179static __be32 *xdr_decode_fileid3(__be32 *p, u64 *fileid)
180{
181 return xdr_decode_hyper(p, fileid);
182}
183
184static int decode_fileid3(struct xdr_stream *xdr, u64 *fileid)
185{
186 return decode_uint64(xdr, fileid);
187}
188
189
190
191
192
193
194static void encode_filename3(struct xdr_stream *xdr,
195 const char *name, u32 length)
196{
197 __be32 *p;
198
199 BUG_ON(length > NFS3_MAXNAMLEN);
200 p = xdr_reserve_space(xdr, 4 + length);
201 xdr_encode_opaque(p, name, length);
202}
203
204static int decode_inline_filename3(struct xdr_stream *xdr,
205 const char **name, u32 *length)
206{
207 __be32 *p;
208 u32 count;
209
210 p = xdr_inline_decode(xdr, 4);
211 if (unlikely(p == NULL))
212 goto out_overflow;
213 count = be32_to_cpup(p);
214 if (count > NFS3_MAXNAMLEN)
215 goto out_nametoolong;
216 p = xdr_inline_decode(xdr, count);
217 if (unlikely(p == NULL))
218 goto out_overflow;
219 *name = (const char *)p;
220 *length = count;
221 return 0;
222
223out_nametoolong:
224 dprintk("NFS: returned filename too long: %u\n", count);
225 return -ENAMETOOLONG;
226out_overflow:
227 print_overflow_msg(__func__, xdr);
228 return -EIO;
229}
230
231
232
233
234
235
236static void encode_nfspath3(struct xdr_stream *xdr, struct page **pages,
237 const u32 length)
238{
239 BUG_ON(length > NFS3_MAXPATHLEN);
240 encode_uint32(xdr, length);
241 xdr_write_pages(xdr, pages, 0, length);
242}
243
244static int decode_nfspath3(struct xdr_stream *xdr)
245{
246 u32 recvd, count;
247 size_t hdrlen;
248 __be32 *p;
249
250 p = xdr_inline_decode(xdr, 4);
251 if (unlikely(p == NULL))
252 goto out_overflow;
253 count = be32_to_cpup(p);
254 if (unlikely(count >= xdr->buf->page_len || count > NFS3_MAXPATHLEN))
255 goto out_nametoolong;
256 hdrlen = (u8 *)xdr->p - (u8 *)xdr->iov->iov_base;
257 recvd = xdr->buf->len - hdrlen;
258 if (unlikely(count > recvd))
259 goto out_cheating;
260
261 xdr_read_pages(xdr, count);
262 xdr_terminate_string(xdr->buf, count);
263 return 0;
264
265out_nametoolong:
266 dprintk("NFS: returned pathname too long: %u\n", count);
267 return -ENAMETOOLONG;
268out_cheating:
269 dprintk("NFS: server cheating in pathname result: "
270 "count %u > recvd %u\n", count, recvd);
271 return -EIO;
272out_overflow:
273 print_overflow_msg(__func__, xdr);
274 return -EIO;
275}
276
277
278
279
280
281
282static __be32 *xdr_encode_cookie3(__be32 *p, u64 cookie)
283{
284 return xdr_encode_hyper(p, cookie);
285}
286
287static int decode_cookie3(struct xdr_stream *xdr, u64 *cookie)
288{
289 return decode_uint64(xdr, cookie);
290}
291
292
293
294
295
296
297static __be32 *xdr_encode_cookieverf3(__be32 *p, const __be32 *verifier)
298{
299 memcpy(p, verifier, NFS3_COOKIEVERFSIZE);
300 return p + XDR_QUADLEN(NFS3_COOKIEVERFSIZE);
301}
302
303static int decode_cookieverf3(struct xdr_stream *xdr, __be32 *verifier)
304{
305 __be32 *p;
306
307 p = xdr_inline_decode(xdr, NFS3_COOKIEVERFSIZE);
308 if (unlikely(p == NULL))
309 goto out_overflow;
310 memcpy(verifier, p, NFS3_COOKIEVERFSIZE);
311 return 0;
312out_overflow:
313 print_overflow_msg(__func__, xdr);
314 return -EIO;
315}
316
317
318
319
320
321
322static void encode_createverf3(struct xdr_stream *xdr, const __be32 *verifier)
323{
324 __be32 *p;
325
326 p = xdr_reserve_space(xdr, NFS3_CREATEVERFSIZE);
327 memcpy(p, verifier, NFS3_CREATEVERFSIZE);
328}
329
330static int decode_writeverf3(struct xdr_stream *xdr, __be32 *verifier)
331{
332 __be32 *p;
333
334 p = xdr_inline_decode(xdr, NFS3_WRITEVERFSIZE);
335 if (unlikely(p == NULL))
336 goto out_overflow;
337 memcpy(verifier, p, NFS3_WRITEVERFSIZE);
338 return 0;
339out_overflow:
340 print_overflow_msg(__func__, xdr);
341 return -EIO;
342}
343
344
345
346
347
348
349static __be32 *xdr_decode_size3(__be32 *p, u64 *size)
350{
351 return xdr_decode_hyper(p, size);
352}
353
354
355
356
357
358
359
360
361
362#define NFS3_OK NFS_OK
363
364static int decode_nfsstat3(struct xdr_stream *xdr, enum nfs_stat *status)
365{
366 __be32 *p;
367
368 p = xdr_inline_decode(xdr, 4);
369 if (unlikely(p == NULL))
370 goto out_overflow;
371 *status = be32_to_cpup(p);
372 return 0;
373out_overflow:
374 print_overflow_msg(__func__, xdr);
375 return -EIO;
376}
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391static void encode_ftype3(struct xdr_stream *xdr, const u32 type)
392{
393 BUG_ON(type > NF3FIFO);
394 encode_uint32(xdr, type);
395}
396
397static __be32 *xdr_decode_ftype3(__be32 *p, umode_t *mode)
398{
399 u32 type;
400
401 type = be32_to_cpup(p++);
402 if (type > NF3FIFO)
403 type = NF3NON;
404 *mode = nfs_type2fmt[type];
405 return p;
406}
407
408
409
410
411
412
413
414
415
416static void encode_specdata3(struct xdr_stream *xdr, const dev_t rdev)
417{
418 __be32 *p;
419
420 p = xdr_reserve_space(xdr, 8);
421 *p++ = cpu_to_be32(MAJOR(rdev));
422 *p = cpu_to_be32(MINOR(rdev));
423}
424
425static __be32 *xdr_decode_specdata3(__be32 *p, dev_t *rdev)
426{
427 unsigned int major, minor;
428
429 major = be32_to_cpup(p++);
430 minor = be32_to_cpup(p++);
431 *rdev = MKDEV(major, minor);
432 if (MAJOR(*rdev) != major || MINOR(*rdev) != minor)
433 *rdev = 0;
434 return p;
435}
436
437
438
439
440
441
442
443
444static void encode_nfs_fh3(struct xdr_stream *xdr, const struct nfs_fh *fh)
445{
446 __be32 *p;
447
448 BUG_ON(fh->size > NFS3_FHSIZE);
449 p = xdr_reserve_space(xdr, 4 + fh->size);
450 xdr_encode_opaque(p, fh->data, fh->size);
451}
452
453static int decode_nfs_fh3(struct xdr_stream *xdr, struct nfs_fh *fh)
454{
455 u32 length;
456 __be32 *p;
457
458 p = xdr_inline_decode(xdr, 4);
459 if (unlikely(p == NULL))
460 goto out_overflow;
461 length = be32_to_cpup(p++);
462 if (unlikely(length > NFS3_FHSIZE))
463 goto out_toobig;
464 p = xdr_inline_decode(xdr, length);
465 if (unlikely(p == NULL))
466 goto out_overflow;
467 fh->size = length;
468 memcpy(fh->data, p, length);
469 return 0;
470out_toobig:
471 dprintk("NFS: file handle size (%u) too big\n", length);
472 return -E2BIG;
473out_overflow:
474 print_overflow_msg(__func__, xdr);
475 return -EIO;
476}
477
478static void zero_nfs_fh3(struct nfs_fh *fh)
479{
480 memset(fh, 0, sizeof(*fh));
481}
482
483
484
485
486
487
488
489
490
491static __be32 *xdr_encode_nfstime3(__be32 *p, const struct timespec *timep)
492{
493 *p++ = cpu_to_be32(timep->tv_sec);
494 *p++ = cpu_to_be32(timep->tv_nsec);
495 return p;
496}
497
498static __be32 *xdr_decode_nfstime3(__be32 *p, struct timespec *timep)
499{
500 timep->tv_sec = be32_to_cpup(p++);
501 timep->tv_nsec = be32_to_cpup(p++);
502 return p;
503}
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565static void encode_sattr3(struct xdr_stream *xdr, const struct iattr *attr)
566{
567 u32 nbytes;
568 __be32 *p;
569
570
571
572
573
574
575
576 nbytes = 6 * 4;
577 if (attr->ia_valid & ATTR_MODE)
578 nbytes += 4;
579 if (attr->ia_valid & ATTR_UID)
580 nbytes += 4;
581 if (attr->ia_valid & ATTR_GID)
582 nbytes += 4;
583 if (attr->ia_valid & ATTR_SIZE)
584 nbytes += 8;
585 if (attr->ia_valid & ATTR_ATIME_SET)
586 nbytes += 8;
587 if (attr->ia_valid & ATTR_MTIME_SET)
588 nbytes += 8;
589 p = xdr_reserve_space(xdr, nbytes);
590
591 if (attr->ia_valid & ATTR_MODE) {
592 *p++ = xdr_one;
593 *p++ = cpu_to_be32(attr->ia_mode & S_IALLUGO);
594 } else
595 *p++ = xdr_zero;
596
597 if (attr->ia_valid & ATTR_UID) {
598 *p++ = xdr_one;
599 *p++ = cpu_to_be32(attr->ia_uid);
600 } else
601 *p++ = xdr_zero;
602
603 if (attr->ia_valid & ATTR_GID) {
604 *p++ = xdr_one;
605 *p++ = cpu_to_be32(attr->ia_gid);
606 } else
607 *p++ = xdr_zero;
608
609 if (attr->ia_valid & ATTR_SIZE) {
610 *p++ = xdr_one;
611 p = xdr_encode_hyper(p, (u64)attr->ia_size);
612 } else
613 *p++ = xdr_zero;
614
615 if (attr->ia_valid & ATTR_ATIME_SET) {
616 *p++ = xdr_two;
617 p = xdr_encode_nfstime3(p, &attr->ia_atime);
618 } else if (attr->ia_valid & ATTR_ATIME) {
619 *p++ = xdr_one;
620 } else
621 *p++ = xdr_zero;
622
623 if (attr->ia_valid & ATTR_MTIME_SET) {
624 *p++ = xdr_two;
625 xdr_encode_nfstime3(p, &attr->ia_mtime);
626 } else if (attr->ia_valid & ATTR_MTIME) {
627 *p = xdr_one;
628 } else
629 *p = xdr_zero;
630}
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651static int decode_fattr3(struct xdr_stream *xdr, struct nfs_fattr *fattr)
652{
653 umode_t fmode;
654 __be32 *p;
655
656 p = xdr_inline_decode(xdr, NFS3_fattr_sz << 2);
657 if (unlikely(p == NULL))
658 goto out_overflow;
659
660 p = xdr_decode_ftype3(p, &fmode);
661
662 fattr->mode = (be32_to_cpup(p++) & ~S_IFMT) | fmode;
663 fattr->nlink = be32_to_cpup(p++);
664 fattr->uid = be32_to_cpup(p++);
665 fattr->gid = be32_to_cpup(p++);
666
667 p = xdr_decode_size3(p, &fattr->size);
668 p = xdr_decode_size3(p, &fattr->du.nfs3.used);
669 p = xdr_decode_specdata3(p, &fattr->rdev);
670
671 p = xdr_decode_hyper(p, &fattr->fsid.major);
672 fattr->fsid.minor = 0;
673
674 p = xdr_decode_fileid3(p, &fattr->fileid);
675 p = xdr_decode_nfstime3(p, &fattr->atime);
676 p = xdr_decode_nfstime3(p, &fattr->mtime);
677 xdr_decode_nfstime3(p, &fattr->ctime);
678
679 fattr->valid |= NFS_ATTR_FATTR_V3;
680 return 0;
681out_overflow:
682 print_overflow_msg(__func__, xdr);
683 return -EIO;
684}
685
686
687
688
689
690
691
692
693
694
695
696static int decode_post_op_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr)
697{
698 __be32 *p;
699
700 p = xdr_inline_decode(xdr, 4);
701 if (unlikely(p == NULL))
702 goto out_overflow;
703 if (*p != xdr_zero)
704 return decode_fattr3(xdr, fattr);
705 return 0;
706out_overflow:
707 print_overflow_msg(__func__, xdr);
708 return -EIO;
709}
710
711
712
713
714
715
716
717
718
719static int decode_wcc_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr)
720{
721 __be32 *p;
722
723 p = xdr_inline_decode(xdr, NFS3_wcc_attr_sz << 2);
724 if (unlikely(p == NULL))
725 goto out_overflow;
726
727 fattr->valid |= NFS_ATTR_FATTR_PRESIZE
728 | NFS_ATTR_FATTR_PREMTIME
729 | NFS_ATTR_FATTR_PRECTIME;
730
731 p = xdr_decode_size3(p, &fattr->pre_size);
732 p = xdr_decode_nfstime3(p, &fattr->pre_mtime);
733 xdr_decode_nfstime3(p, &fattr->pre_ctime);
734
735 return 0;
736out_overflow:
737 print_overflow_msg(__func__, xdr);
738 return -EIO;
739}
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757static int decode_pre_op_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr)
758{
759 __be32 *p;
760
761 p = xdr_inline_decode(xdr, 4);
762 if (unlikely(p == NULL))
763 goto out_overflow;
764 if (*p != xdr_zero)
765 return decode_wcc_attr(xdr, fattr);
766 return 0;
767out_overflow:
768 print_overflow_msg(__func__, xdr);
769 return -EIO;
770}
771
772static int decode_wcc_data(struct xdr_stream *xdr, struct nfs_fattr *fattr)
773{
774 int error;
775
776 error = decode_pre_op_attr(xdr, fattr);
777 if (unlikely(error))
778 goto out;
779 error = decode_post_op_attr(xdr, fattr);
780out:
781 return error;
782}
783
784
785
786
787
788
789
790
791
792
793
794static int decode_post_op_fh3(struct xdr_stream *xdr, struct nfs_fh *fh)
795{
796 __be32 *p = xdr_inline_decode(xdr, 4);
797 if (unlikely(p == NULL))
798 goto out_overflow;
799 if (*p != xdr_zero)
800 return decode_nfs_fh3(xdr, fh);
801 zero_nfs_fh3(fh);
802 return 0;
803out_overflow:
804 print_overflow_msg(__func__, xdr);
805 return -EIO;
806}
807
808
809
810
811
812
813
814
815
816static void encode_diropargs3(struct xdr_stream *xdr, const struct nfs_fh *fh,
817 const char *name, u32 length)
818{
819 encode_nfs_fh3(xdr, fh);
820 encode_filename3(xdr, name, length);
821}
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838static void nfs3_xdr_enc_getattr3args(struct rpc_rqst *req,
839 struct xdr_stream *xdr,
840 const struct nfs_fh *fh)
841{
842 encode_nfs_fh3(xdr, fh);
843}
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861static void encode_sattrguard3(struct xdr_stream *xdr,
862 const struct nfs3_sattrargs *args)
863{
864 __be32 *p;
865
866 if (args->guard) {
867 p = xdr_reserve_space(xdr, 4 + 8);
868 *p++ = xdr_one;
869 xdr_encode_nfstime3(p, &args->guardtime);
870 } else {
871 p = xdr_reserve_space(xdr, 4);
872 *p = xdr_zero;
873 }
874}
875
876static void nfs3_xdr_enc_setattr3args(struct rpc_rqst *req,
877 struct xdr_stream *xdr,
878 const struct nfs3_sattrargs *args)
879{
880 encode_nfs_fh3(xdr, args->fh);
881 encode_sattr3(xdr, args->sattr);
882 encode_sattrguard3(xdr, args);
883}
884
885
886
887
888
889
890
891
892static void nfs3_xdr_enc_lookup3args(struct rpc_rqst *req,
893 struct xdr_stream *xdr,
894 const struct nfs3_diropargs *args)
895{
896 encode_diropargs3(xdr, args->fh, args->name, args->len);
897}
898
899
900
901
902
903
904
905
906
907static void encode_access3args(struct xdr_stream *xdr,
908 const struct nfs3_accessargs *args)
909{
910 encode_nfs_fh3(xdr, args->fh);
911 encode_uint32(xdr, args->access);
912}
913
914static void nfs3_xdr_enc_access3args(struct rpc_rqst *req,
915 struct xdr_stream *xdr,
916 const struct nfs3_accessargs *args)
917{
918 encode_access3args(xdr, args);
919}
920
921
922
923
924
925
926
927
928static void nfs3_xdr_enc_readlink3args(struct rpc_rqst *req,
929 struct xdr_stream *xdr,
930 const struct nfs3_readlinkargs *args)
931{
932 encode_nfs_fh3(xdr, args->fh);
933 prepare_reply_buffer(req, args->pages, args->pgbase,
934 args->pglen, NFS3_readlinkres_sz);
935}
936
937
938
939
940
941
942
943
944
945
946static void encode_read3args(struct xdr_stream *xdr,
947 const struct nfs_readargs *args)
948{
949 __be32 *p;
950
951 encode_nfs_fh3(xdr, args->fh);
952
953 p = xdr_reserve_space(xdr, 8 + 4);
954 p = xdr_encode_hyper(p, args->offset);
955 *p = cpu_to_be32(args->count);
956}
957
958static void nfs3_xdr_enc_read3args(struct rpc_rqst *req,
959 struct xdr_stream *xdr,
960 const struct nfs_readargs *args)
961{
962 encode_read3args(xdr, args);
963 prepare_reply_buffer(req, args->pages, args->pgbase,
964 args->count, NFS3_readres_sz);
965 req->rq_rcv_buf.flags |= XDRBUF_READ;
966}
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985static void encode_write3args(struct xdr_stream *xdr,
986 const struct nfs_writeargs *args)
987{
988 __be32 *p;
989
990 encode_nfs_fh3(xdr, args->fh);
991
992 p = xdr_reserve_space(xdr, 8 + 4 + 4 + 4);
993 p = xdr_encode_hyper(p, args->offset);
994 *p++ = cpu_to_be32(args->count);
995 *p++ = cpu_to_be32(args->stable);
996 *p = cpu_to_be32(args->count);
997 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
998}
999
1000static void nfs3_xdr_enc_write3args(struct rpc_rqst *req,
1001 struct xdr_stream *xdr,
1002 const struct nfs_writeargs *args)
1003{
1004 encode_write3args(xdr, args);
1005 xdr->buf->flags |= XDRBUF_WRITE;
1006}
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030static void encode_createhow3(struct xdr_stream *xdr,
1031 const struct nfs3_createargs *args)
1032{
1033 encode_uint32(xdr, args->createmode);
1034 switch (args->createmode) {
1035 case NFS3_CREATE_UNCHECKED:
1036 case NFS3_CREATE_GUARDED:
1037 encode_sattr3(xdr, args->sattr);
1038 break;
1039 case NFS3_CREATE_EXCLUSIVE:
1040 encode_createverf3(xdr, args->verifier);
1041 break;
1042 default:
1043 BUG();
1044 }
1045}
1046
1047static void nfs3_xdr_enc_create3args(struct rpc_rqst *req,
1048 struct xdr_stream *xdr,
1049 const struct nfs3_createargs *args)
1050{
1051 encode_diropargs3(xdr, args->fh, args->name, args->len);
1052 encode_createhow3(xdr, args);
1053}
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063static void nfs3_xdr_enc_mkdir3args(struct rpc_rqst *req,
1064 struct xdr_stream *xdr,
1065 const struct nfs3_mkdirargs *args)
1066{
1067 encode_diropargs3(xdr, args->fh, args->name, args->len);
1068 encode_sattr3(xdr, args->sattr);
1069}
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084static void encode_symlinkdata3(struct xdr_stream *xdr,
1085 const struct nfs3_symlinkargs *args)
1086{
1087 encode_sattr3(xdr, args->sattr);
1088 encode_nfspath3(xdr, args->pages, args->pathlen);
1089}
1090
1091static void nfs3_xdr_enc_symlink3args(struct rpc_rqst *req,
1092 struct xdr_stream *xdr,
1093 const struct nfs3_symlinkargs *args)
1094{
1095 encode_diropargs3(xdr, args->fromfh, args->fromname, args->fromlen);
1096 encode_symlinkdata3(xdr, args);
1097}
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123static void encode_devicedata3(struct xdr_stream *xdr,
1124 const struct nfs3_mknodargs *args)
1125{
1126 encode_sattr3(xdr, args->sattr);
1127 encode_specdata3(xdr, args->rdev);
1128}
1129
1130static void encode_mknoddata3(struct xdr_stream *xdr,
1131 const struct nfs3_mknodargs *args)
1132{
1133 encode_ftype3(xdr, args->type);
1134 switch (args->type) {
1135 case NF3CHR:
1136 case NF3BLK:
1137 encode_devicedata3(xdr, args);
1138 break;
1139 case NF3SOCK:
1140 case NF3FIFO:
1141 encode_sattr3(xdr, args->sattr);
1142 break;
1143 case NF3REG:
1144 case NF3DIR:
1145 break;
1146 default:
1147 BUG();
1148 }
1149}
1150
1151static void nfs3_xdr_enc_mknod3args(struct rpc_rqst *req,
1152 struct xdr_stream *xdr,
1153 const struct nfs3_mknodargs *args)
1154{
1155 encode_diropargs3(xdr, args->fh, args->name, args->len);
1156 encode_mknoddata3(xdr, args);
1157}
1158
1159
1160
1161
1162
1163
1164
1165
1166static void nfs3_xdr_enc_remove3args(struct rpc_rqst *req,
1167 struct xdr_stream *xdr,
1168 const struct nfs_removeargs *args)
1169{
1170 encode_diropargs3(xdr, args->fh, args->name.name, args->name.len);
1171}
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181static void nfs3_xdr_enc_rename3args(struct rpc_rqst *req,
1182 struct xdr_stream *xdr,
1183 const struct nfs_renameargs *args)
1184{
1185 const struct qstr *old = args->old_name;
1186 const struct qstr *new = args->new_name;
1187
1188 encode_diropargs3(xdr, args->old_dir, old->name, old->len);
1189 encode_diropargs3(xdr, args->new_dir, new->name, new->len);
1190}
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200static void nfs3_xdr_enc_link3args(struct rpc_rqst *req,
1201 struct xdr_stream *xdr,
1202 const struct nfs3_linkargs *args)
1203{
1204 encode_nfs_fh3(xdr, args->fromfh);
1205 encode_diropargs3(xdr, args->tofh, args->toname, args->tolen);
1206}
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218static void encode_readdir3args(struct xdr_stream *xdr,
1219 const struct nfs3_readdirargs *args)
1220{
1221 __be32 *p;
1222
1223 encode_nfs_fh3(xdr, args->fh);
1224
1225 p = xdr_reserve_space(xdr, 8 + NFS3_COOKIEVERFSIZE + 4);
1226 p = xdr_encode_cookie3(p, args->cookie);
1227 p = xdr_encode_cookieverf3(p, args->verf);
1228 *p = cpu_to_be32(args->count);
1229}
1230
1231static void nfs3_xdr_enc_readdir3args(struct rpc_rqst *req,
1232 struct xdr_stream *xdr,
1233 const struct nfs3_readdirargs *args)
1234{
1235 encode_readdir3args(xdr, args);
1236 prepare_reply_buffer(req, args->pages, 0,
1237 args->count, NFS3_readdirres_sz);
1238}
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251static void encode_readdirplus3args(struct xdr_stream *xdr,
1252 const struct nfs3_readdirargs *args)
1253{
1254 __be32 *p;
1255
1256 encode_nfs_fh3(xdr, args->fh);
1257
1258 p = xdr_reserve_space(xdr, 8 + NFS3_COOKIEVERFSIZE + 4 + 4);
1259 p = xdr_encode_cookie3(p, args->cookie);
1260 p = xdr_encode_cookieverf3(p, args->verf);
1261
1262
1263
1264
1265
1266 *p++ = cpu_to_be32(args->count >> 3);
1267
1268 *p = cpu_to_be32(args->count);
1269}
1270
1271static void nfs3_xdr_enc_readdirplus3args(struct rpc_rqst *req,
1272 struct xdr_stream *xdr,
1273 const struct nfs3_readdirargs *args)
1274{
1275 encode_readdirplus3args(xdr, args);
1276 prepare_reply_buffer(req, args->pages, 0,
1277 args->count, NFS3_readdirres_sz);
1278}
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289static void encode_commit3args(struct xdr_stream *xdr,
1290 const struct nfs_writeargs *args)
1291{
1292 __be32 *p;
1293
1294 encode_nfs_fh3(xdr, args->fh);
1295
1296 p = xdr_reserve_space(xdr, 8 + 4);
1297 p = xdr_encode_hyper(p, args->offset);
1298 *p = cpu_to_be32(args->count);
1299}
1300
1301static void nfs3_xdr_enc_commit3args(struct rpc_rqst *req,
1302 struct xdr_stream *xdr,
1303 const struct nfs_writeargs *args)
1304{
1305 encode_commit3args(xdr, args);
1306}
1307
1308#ifdef CONFIG_NFS_V3_ACL
1309
1310static void nfs3_xdr_enc_getacl3args(struct rpc_rqst *req,
1311 struct xdr_stream *xdr,
1312 const struct nfs3_getaclargs *args)
1313{
1314 encode_nfs_fh3(xdr, args->fh);
1315 encode_uint32(xdr, args->mask);
1316 if (args->mask & (NFS_ACL | NFS_DFACL))
1317 prepare_reply_buffer(req, args->pages, 0,
1318 NFSACL_MAXPAGES << PAGE_SHIFT,
1319 ACL3_getaclres_sz);
1320}
1321
1322static void nfs3_xdr_enc_setacl3args(struct rpc_rqst *req,
1323 struct xdr_stream *xdr,
1324 const struct nfs3_setaclargs *args)
1325{
1326 unsigned int base;
1327 int error;
1328
1329 encode_nfs_fh3(xdr, NFS_FH(args->inode));
1330 encode_uint32(xdr, args->mask);
1331
1332 base = req->rq_slen;
1333 if (args->npages != 0)
1334 xdr_write_pages(xdr, args->pages, 0, args->len);
1335 else
1336 xdr_reserve_space(xdr, NFS_ACL_INLINE_BUFSIZE);
1337
1338 error = nfsacl_encode(xdr->buf, base, args->inode,
1339 (args->mask & NFS_ACL) ?
1340 args->acl_access : NULL, 1, 0);
1341 BUG_ON(error < 0);
1342 error = nfsacl_encode(xdr->buf, base + error, args->inode,
1343 (args->mask & NFS_DFACL) ?
1344 args->acl_default : NULL, 1,
1345 NFS_ACL_DEFAULT);
1346 BUG_ON(error < 0);
1347}
1348
1349#endif
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372static int nfs3_xdr_dec_getattr3res(struct rpc_rqst *req,
1373 struct xdr_stream *xdr,
1374 struct nfs_fattr *result)
1375{
1376 enum nfs_stat status;
1377 int error;
1378
1379 error = decode_nfsstat3(xdr, &status);
1380 if (unlikely(error))
1381 goto out;
1382 if (status != NFS3_OK)
1383 goto out_default;
1384 error = decode_fattr3(xdr, result);
1385out:
1386 return error;
1387out_default:
1388 return nfs_stat_to_errno(status);
1389}
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409static int nfs3_xdr_dec_setattr3res(struct rpc_rqst *req,
1410 struct xdr_stream *xdr,
1411 struct nfs_fattr *result)
1412{
1413 enum nfs_stat status;
1414 int error;
1415
1416 error = decode_nfsstat3(xdr, &status);
1417 if (unlikely(error))
1418 goto out;
1419 error = decode_wcc_data(xdr, result);
1420 if (unlikely(error))
1421 goto out;
1422 if (status != NFS3_OK)
1423 goto out_status;
1424out:
1425 return error;
1426out_status:
1427 return nfs_stat_to_errno(status);
1428}
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450static int nfs3_xdr_dec_lookup3res(struct rpc_rqst *req,
1451 struct xdr_stream *xdr,
1452 struct nfs3_diropres *result)
1453{
1454 enum nfs_stat status;
1455 int error;
1456
1457 error = decode_nfsstat3(xdr, &status);
1458 if (unlikely(error))
1459 goto out;
1460 if (status != NFS3_OK)
1461 goto out_default;
1462 error = decode_nfs_fh3(xdr, result->fh);
1463 if (unlikely(error))
1464 goto out;
1465 error = decode_post_op_attr(xdr, result->fattr);
1466 if (unlikely(error))
1467 goto out;
1468 error = decode_post_op_attr(xdr, result->dir_attr);
1469out:
1470 return error;
1471out_default:
1472 error = decode_post_op_attr(xdr, result->dir_attr);
1473 if (unlikely(error))
1474 goto out;
1475 return nfs_stat_to_errno(status);
1476}
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497static int nfs3_xdr_dec_access3res(struct rpc_rqst *req,
1498 struct xdr_stream *xdr,
1499 struct nfs3_accessres *result)
1500{
1501 enum nfs_stat status;
1502 int error;
1503
1504 error = decode_nfsstat3(xdr, &status);
1505 if (unlikely(error))
1506 goto out;
1507 error = decode_post_op_attr(xdr, result->fattr);
1508 if (unlikely(error))
1509 goto out;
1510 if (status != NFS3_OK)
1511 goto out_default;
1512 error = decode_uint32(xdr, &result->access);
1513out:
1514 return error;
1515out_default:
1516 return nfs_stat_to_errno(status);
1517}
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538static int nfs3_xdr_dec_readlink3res(struct rpc_rqst *req,
1539 struct xdr_stream *xdr,
1540 struct nfs_fattr *result)
1541{
1542 enum nfs_stat status;
1543 int error;
1544
1545 error = decode_nfsstat3(xdr, &status);
1546 if (unlikely(error))
1547 goto out;
1548 error = decode_post_op_attr(xdr, result);
1549 if (unlikely(error))
1550 goto out;
1551 if (status != NFS3_OK)
1552 goto out_default;
1553 error = decode_nfspath3(xdr);
1554out:
1555 return error;
1556out_default:
1557 return nfs_stat_to_errno(status);
1558}
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581static int decode_read3resok(struct xdr_stream *xdr,
1582 struct nfs_readres *result)
1583{
1584 u32 eof, count, ocount, recvd;
1585 size_t hdrlen;
1586 __be32 *p;
1587
1588 p = xdr_inline_decode(xdr, 4 + 4 + 4);
1589 if (unlikely(p == NULL))
1590 goto out_overflow;
1591 count = be32_to_cpup(p++);
1592 eof = be32_to_cpup(p++);
1593 ocount = be32_to_cpup(p++);
1594 if (unlikely(ocount != count))
1595 goto out_mismatch;
1596 hdrlen = (u8 *)xdr->p - (u8 *)xdr->iov->iov_base;
1597 recvd = xdr->buf->len - hdrlen;
1598 if (unlikely(count > recvd))
1599 goto out_cheating;
1600
1601out:
1602 xdr_read_pages(xdr, count);
1603 result->eof = eof;
1604 result->count = count;
1605 return count;
1606out_mismatch:
1607 dprintk("NFS: READ count doesn't match length of opaque: "
1608 "count %u != ocount %u\n", count, ocount);
1609 return -EIO;
1610out_cheating:
1611 dprintk("NFS: server cheating in read result: "
1612 "count %u > recvd %u\n", count, recvd);
1613 count = recvd;
1614 eof = 0;
1615 goto out;
1616out_overflow:
1617 print_overflow_msg(__func__, xdr);
1618 return -EIO;
1619}
1620
1621static int nfs3_xdr_dec_read3res(struct rpc_rqst *req, struct xdr_stream *xdr,
1622 struct nfs_readres *result)
1623{
1624 enum nfs_stat status;
1625 int error;
1626
1627 error = decode_nfsstat3(xdr, &status);
1628 if (unlikely(error))
1629 goto out;
1630 error = decode_post_op_attr(xdr, result->fattr);
1631 if (unlikely(error))
1632 goto out;
1633 if (status != NFS3_OK)
1634 goto out_status;
1635 error = decode_read3resok(xdr, result);
1636out:
1637 return error;
1638out_status:
1639 return nfs_stat_to_errno(status);
1640}
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669static int decode_write3resok(struct xdr_stream *xdr,
1670 struct nfs_writeres *result)
1671{
1672 __be32 *p;
1673
1674 p = xdr_inline_decode(xdr, 4 + 4 + NFS3_WRITEVERFSIZE);
1675 if (unlikely(p == NULL))
1676 goto out_overflow;
1677 result->count = be32_to_cpup(p++);
1678 result->verf->committed = be32_to_cpup(p++);
1679 if (unlikely(result->verf->committed > NFS_FILE_SYNC))
1680 goto out_badvalue;
1681 memcpy(result->verf->verifier, p, NFS3_WRITEVERFSIZE);
1682 return result->count;
1683out_badvalue:
1684 dprintk("NFS: bad stable_how value: %u\n", result->verf->committed);
1685 return -EIO;
1686out_overflow:
1687 print_overflow_msg(__func__, xdr);
1688 return -EIO;
1689}
1690
1691static int nfs3_xdr_dec_write3res(struct rpc_rqst *req, struct xdr_stream *xdr,
1692 struct nfs_writeres *result)
1693{
1694 enum nfs_stat status;
1695 int error;
1696
1697 error = decode_nfsstat3(xdr, &status);
1698 if (unlikely(error))
1699 goto out;
1700 error = decode_wcc_data(xdr, result->fattr);
1701 if (unlikely(error))
1702 goto out;
1703 if (status != NFS3_OK)
1704 goto out_status;
1705 error = decode_write3resok(xdr, result);
1706out:
1707 return error;
1708out_status:
1709 return nfs_stat_to_errno(status);
1710}
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732static int decode_create3resok(struct xdr_stream *xdr,
1733 struct nfs3_diropres *result)
1734{
1735 int error;
1736
1737 error = decode_post_op_fh3(xdr, result->fh);
1738 if (unlikely(error))
1739 goto out;
1740 error = decode_post_op_attr(xdr, result->fattr);
1741 if (unlikely(error))
1742 goto out;
1743
1744
1745
1746
1747 if (result->fh->size == 0)
1748 result->fattr->valid = 0;
1749 error = decode_wcc_data(xdr, result->dir_attr);
1750out:
1751 return error;
1752}
1753
1754static int nfs3_xdr_dec_create3res(struct rpc_rqst *req,
1755 struct xdr_stream *xdr,
1756 struct nfs3_diropres *result)
1757{
1758 enum nfs_stat status;
1759 int error;
1760
1761 error = decode_nfsstat3(xdr, &status);
1762 if (unlikely(error))
1763 goto out;
1764 if (status != NFS3_OK)
1765 goto out_default;
1766 error = decode_create3resok(xdr, result);
1767out:
1768 return error;
1769out_default:
1770 error = decode_wcc_data(xdr, result->dir_attr);
1771 if (unlikely(error))
1772 goto out;
1773 return nfs_stat_to_errno(status);
1774}
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794static int nfs3_xdr_dec_remove3res(struct rpc_rqst *req,
1795 struct xdr_stream *xdr,
1796 struct nfs_removeres *result)
1797{
1798 enum nfs_stat status;
1799 int error;
1800
1801 error = decode_nfsstat3(xdr, &status);
1802 if (unlikely(error))
1803 goto out;
1804 error = decode_wcc_data(xdr, result->dir_attr);
1805 if (unlikely(error))
1806 goto out;
1807 if (status != NFS3_OK)
1808 goto out_status;
1809out:
1810 return error;
1811out_status:
1812 return nfs_stat_to_errno(status);
1813}
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835static int nfs3_xdr_dec_rename3res(struct rpc_rqst *req,
1836 struct xdr_stream *xdr,
1837 struct nfs_renameres *result)
1838{
1839 enum nfs_stat status;
1840 int error;
1841
1842 error = decode_nfsstat3(xdr, &status);
1843 if (unlikely(error))
1844 goto out;
1845 error = decode_wcc_data(xdr, result->old_fattr);
1846 if (unlikely(error))
1847 goto out;
1848 error = decode_wcc_data(xdr, result->new_fattr);
1849 if (unlikely(error))
1850 goto out;
1851 if (status != NFS3_OK)
1852 goto out_status;
1853out:
1854 return error;
1855out_status:
1856 return nfs_stat_to_errno(status);
1857}
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879static int nfs3_xdr_dec_link3res(struct rpc_rqst *req, struct xdr_stream *xdr,
1880 struct nfs3_linkres *result)
1881{
1882 enum nfs_stat status;
1883 int error;
1884
1885 error = decode_nfsstat3(xdr, &status);
1886 if (unlikely(error))
1887 goto out;
1888 error = decode_post_op_attr(xdr, result->fattr);
1889 if (unlikely(error))
1890 goto out;
1891 error = decode_wcc_data(xdr, result->dir_attr);
1892 if (unlikely(error))
1893 goto out;
1894 if (status != NFS3_OK)
1895 goto out_status;
1896out:
1897 return error;
1898out_status:
1899 return nfs_stat_to_errno(status);
1900}
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937int nfs3_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
1938 int plus)
1939{
1940 struct nfs_entry old = *entry;
1941 __be32 *p;
1942 int error;
1943
1944 p = xdr_inline_decode(xdr, 4);
1945 if (unlikely(p == NULL))
1946 goto out_overflow;
1947 if (*p == xdr_zero) {
1948 p = xdr_inline_decode(xdr, 4);
1949 if (unlikely(p == NULL))
1950 goto out_overflow;
1951 if (*p == xdr_zero)
1952 return -EAGAIN;
1953 entry->eof = 1;
1954 return -EBADCOOKIE;
1955 }
1956
1957 error = decode_fileid3(xdr, &entry->ino);
1958 if (unlikely(error))
1959 return error;
1960
1961 error = decode_inline_filename3(xdr, &entry->name, &entry->len);
1962 if (unlikely(error))
1963 return error;
1964
1965 entry->prev_cookie = entry->cookie;
1966 error = decode_cookie3(xdr, &entry->cookie);
1967 if (unlikely(error))
1968 return error;
1969
1970 entry->d_type = DT_UNKNOWN;
1971
1972 if (plus) {
1973 entry->fattr->valid = 0;
1974 error = decode_post_op_attr(xdr, entry->fattr);
1975 if (unlikely(error))
1976 return error;
1977 if (entry->fattr->valid & NFS_ATTR_FATTR_V3)
1978 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
1979
1980
1981 p = xdr_inline_decode(xdr, 4);
1982 if (unlikely(p == NULL))
1983 goto out_overflow;
1984 if (*p != xdr_zero) {
1985 error = decode_nfs_fh3(xdr, entry->fh);
1986 if (unlikely(error)) {
1987 if (error == -E2BIG)
1988 goto out_truncated;
1989 return error;
1990 }
1991 } else
1992 zero_nfs_fh3(entry->fh);
1993 }
1994
1995 return 0;
1996
1997out_overflow:
1998 print_overflow_msg(__func__, xdr);
1999 return -EAGAIN;
2000out_truncated:
2001 dprintk("NFS: directory entry contains invalid file handle\n");
2002 *entry = old;
2003 return -EAGAIN;
2004}
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035static int decode_dirlist3(struct xdr_stream *xdr)
2036{
2037 u32 recvd, pglen;
2038 size_t hdrlen;
2039
2040 pglen = xdr->buf->page_len;
2041 hdrlen = (u8 *)xdr->p - (u8 *)xdr->iov->iov_base;
2042 recvd = xdr->buf->len - hdrlen;
2043 if (unlikely(pglen > recvd))
2044 goto out_cheating;
2045out:
2046 xdr_read_pages(xdr, pglen);
2047 return pglen;
2048out_cheating:
2049 dprintk("NFS: server cheating in readdir result: "
2050 "pglen %u > recvd %u\n", pglen, recvd);
2051 pglen = recvd;
2052 goto out;
2053}
2054
2055static int decode_readdir3resok(struct xdr_stream *xdr,
2056 struct nfs3_readdirres *result)
2057{
2058 int error;
2059
2060 error = decode_post_op_attr(xdr, result->dir_attr);
2061 if (unlikely(error))
2062 goto out;
2063
2064 error = decode_cookieverf3(xdr, result->verf);
2065 if (unlikely(error))
2066 goto out;
2067 error = decode_dirlist3(xdr);
2068out:
2069 return error;
2070}
2071
2072static int nfs3_xdr_dec_readdir3res(struct rpc_rqst *req,
2073 struct xdr_stream *xdr,
2074 struct nfs3_readdirres *result)
2075{
2076 enum nfs_stat status;
2077 int error;
2078
2079 error = decode_nfsstat3(xdr, &status);
2080 if (unlikely(error))
2081 goto out;
2082 if (status != NFS3_OK)
2083 goto out_default;
2084 error = decode_readdir3resok(xdr, result);
2085out:
2086 return error;
2087out_default:
2088 error = decode_post_op_attr(xdr, result->dir_attr);
2089 if (unlikely(error))
2090 goto out;
2091 return nfs_stat_to_errno(status);
2092}
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119static int decode_fsstat3resok(struct xdr_stream *xdr,
2120 struct nfs_fsstat *result)
2121{
2122 __be32 *p;
2123
2124 p = xdr_inline_decode(xdr, 8 * 6 + 4);
2125 if (unlikely(p == NULL))
2126 goto out_overflow;
2127 p = xdr_decode_size3(p, &result->tbytes);
2128 p = xdr_decode_size3(p, &result->fbytes);
2129 p = xdr_decode_size3(p, &result->abytes);
2130 p = xdr_decode_size3(p, &result->tfiles);
2131 p = xdr_decode_size3(p, &result->ffiles);
2132 xdr_decode_size3(p, &result->afiles);
2133
2134 return 0;
2135out_overflow:
2136 print_overflow_msg(__func__, xdr);
2137 return -EIO;
2138}
2139
2140static int nfs3_xdr_dec_fsstat3res(struct rpc_rqst *req,
2141 struct xdr_stream *xdr,
2142 struct nfs_fsstat *result)
2143{
2144 enum nfs_stat status;
2145 int error;
2146
2147 error = decode_nfsstat3(xdr, &status);
2148 if (unlikely(error))
2149 goto out;
2150 error = decode_post_op_attr(xdr, result->fattr);
2151 if (unlikely(error))
2152 goto out;
2153 if (status != NFS3_OK)
2154 goto out_status;
2155 error = decode_fsstat3resok(xdr, result);
2156out:
2157 return error;
2158out_status:
2159 return nfs_stat_to_errno(status);
2160}
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190static int decode_fsinfo3resok(struct xdr_stream *xdr,
2191 struct nfs_fsinfo *result)
2192{
2193 __be32 *p;
2194
2195 p = xdr_inline_decode(xdr, 4 * 7 + 8 + 8 + 4);
2196 if (unlikely(p == NULL))
2197 goto out_overflow;
2198 result->rtmax = be32_to_cpup(p++);
2199 result->rtpref = be32_to_cpup(p++);
2200 result->rtmult = be32_to_cpup(p++);
2201 result->wtmax = be32_to_cpup(p++);
2202 result->wtpref = be32_to_cpup(p++);
2203 result->wtmult = be32_to_cpup(p++);
2204 result->dtpref = be32_to_cpup(p++);
2205 p = xdr_decode_size3(p, &result->maxfilesize);
2206 xdr_decode_nfstime3(p, &result->time_delta);
2207
2208
2209 result->lease_time = 0;
2210 return 0;
2211out_overflow:
2212 print_overflow_msg(__func__, xdr);
2213 return -EIO;
2214}
2215
2216static int nfs3_xdr_dec_fsinfo3res(struct rpc_rqst *req,
2217 struct xdr_stream *xdr,
2218 struct nfs_fsinfo *result)
2219{
2220 enum nfs_stat status;
2221 int error;
2222
2223 error = decode_nfsstat3(xdr, &status);
2224 if (unlikely(error))
2225 goto out;
2226 error = decode_post_op_attr(xdr, result->fattr);
2227 if (unlikely(error))
2228 goto out;
2229 if (status != NFS3_OK)
2230 goto out_status;
2231 error = decode_fsinfo3resok(xdr, result);
2232out:
2233 return error;
2234out_status:
2235 return nfs_stat_to_errno(status);
2236}
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262static int decode_pathconf3resok(struct xdr_stream *xdr,
2263 struct nfs_pathconf *result)
2264{
2265 __be32 *p;
2266
2267 p = xdr_inline_decode(xdr, 4 * 6);
2268 if (unlikely(p == NULL))
2269 goto out_overflow;
2270 result->max_link = be32_to_cpup(p++);
2271 result->max_namelen = be32_to_cpup(p);
2272
2273 return 0;
2274out_overflow:
2275 print_overflow_msg(__func__, xdr);
2276 return -EIO;
2277}
2278
2279static int nfs3_xdr_dec_pathconf3res(struct rpc_rqst *req,
2280 struct xdr_stream *xdr,
2281 struct nfs_pathconf *result)
2282{
2283 enum nfs_stat status;
2284 int error;
2285
2286 error = decode_nfsstat3(xdr, &status);
2287 if (unlikely(error))
2288 goto out;
2289 error = decode_post_op_attr(xdr, result->fattr);
2290 if (unlikely(error))
2291 goto out;
2292 if (status != NFS3_OK)
2293 goto out_status;
2294 error = decode_pathconf3resok(xdr, result);
2295out:
2296 return error;
2297out_status:
2298 return nfs_stat_to_errno(status);
2299}
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320static int nfs3_xdr_dec_commit3res(struct rpc_rqst *req,
2321 struct xdr_stream *xdr,
2322 struct nfs_writeres *result)
2323{
2324 enum nfs_stat status;
2325 int error;
2326
2327 error = decode_nfsstat3(xdr, &status);
2328 if (unlikely(error))
2329 goto out;
2330 error = decode_wcc_data(xdr, result->fattr);
2331 if (unlikely(error))
2332 goto out;
2333 if (status != NFS3_OK)
2334 goto out_status;
2335 error = decode_writeverf3(xdr, result->verf->verifier);
2336out:
2337 return error;
2338out_status:
2339 return nfs_stat_to_errno(status);
2340}
2341
2342#ifdef CONFIG_NFS_V3_ACL
2343
2344static inline int decode_getacl3resok(struct xdr_stream *xdr,
2345 struct nfs3_getaclres *result)
2346{
2347 struct posix_acl **acl;
2348 unsigned int *aclcnt;
2349 size_t hdrlen;
2350 int error;
2351
2352 error = decode_post_op_attr(xdr, result->fattr);
2353 if (unlikely(error))
2354 goto out;
2355 error = decode_uint32(xdr, &result->mask);
2356 if (unlikely(error))
2357 goto out;
2358 error = -EINVAL;
2359 if (result->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT))
2360 goto out;
2361
2362 hdrlen = (u8 *)xdr->p - (u8 *)xdr->iov->iov_base;
2363
2364 acl = NULL;
2365 if (result->mask & NFS_ACL)
2366 acl = &result->acl_access;
2367 aclcnt = NULL;
2368 if (result->mask & NFS_ACLCNT)
2369 aclcnt = &result->acl_access_count;
2370 error = nfsacl_decode(xdr->buf, hdrlen, aclcnt, acl);
2371 if (unlikely(error <= 0))
2372 goto out;
2373
2374 acl = NULL;
2375 if (result->mask & NFS_DFACL)
2376 acl = &result->acl_default;
2377 aclcnt = NULL;
2378 if (result->mask & NFS_DFACLCNT)
2379 aclcnt = &result->acl_default_count;
2380 error = nfsacl_decode(xdr->buf, hdrlen + error, aclcnt, acl);
2381 if (unlikely(error <= 0))
2382 return error;
2383 error = 0;
2384out:
2385 return error;
2386}
2387
2388static int nfs3_xdr_dec_getacl3res(struct rpc_rqst *req,
2389 struct xdr_stream *xdr,
2390 struct nfs3_getaclres *result)
2391{
2392 enum nfs_stat status;
2393 int error;
2394
2395 error = decode_nfsstat3(xdr, &status);
2396 if (unlikely(error))
2397 goto out;
2398 if (status != NFS3_OK)
2399 goto out_default;
2400 error = decode_getacl3resok(xdr, result);
2401out:
2402 return error;
2403out_default:
2404 return nfs_stat_to_errno(status);
2405}
2406
2407static int nfs3_xdr_dec_setacl3res(struct rpc_rqst *req,
2408 struct xdr_stream *xdr,
2409 struct nfs_fattr *result)
2410{
2411 enum nfs_stat status;
2412 int error;
2413
2414 error = decode_nfsstat3(xdr, &status);
2415 if (unlikely(error))
2416 goto out;
2417 if (status != NFS3_OK)
2418 goto out_default;
2419 error = decode_post_op_attr(xdr, result);
2420out:
2421 return error;
2422out_default:
2423 return nfs_stat_to_errno(status);
2424}
2425
2426#endif
2427
2428#define PROC(proc, argtype, restype, timer) \
2429[NFS3PROC_##proc] = { \
2430 .p_proc = NFS3PROC_##proc, \
2431 .p_encode = (kxdreproc_t)nfs3_xdr_enc_##argtype##3args, \
2432 .p_decode = (kxdrdproc_t)nfs3_xdr_dec_##restype##3res, \
2433 .p_arglen = NFS3_##argtype##args_sz, \
2434 .p_replen = NFS3_##restype##res_sz, \
2435 .p_timer = timer, \
2436 .p_statidx = NFS3PROC_##proc, \
2437 .p_name = #proc, \
2438 }
2439
2440struct rpc_procinfo nfs3_procedures[] = {
2441 PROC(GETATTR, getattr, getattr, 1),
2442 PROC(SETATTR, setattr, setattr, 0),
2443 PROC(LOOKUP, lookup, lookup, 2),
2444 PROC(ACCESS, access, access, 1),
2445 PROC(READLINK, readlink, readlink, 3),
2446 PROC(READ, read, read, 3),
2447 PROC(WRITE, write, write, 4),
2448 PROC(CREATE, create, create, 0),
2449 PROC(MKDIR, mkdir, create, 0),
2450 PROC(SYMLINK, symlink, create, 0),
2451 PROC(MKNOD, mknod, create, 0),
2452 PROC(REMOVE, remove, remove, 0),
2453 PROC(RMDIR, lookup, setattr, 0),
2454 PROC(RENAME, rename, rename, 0),
2455 PROC(LINK, link, link, 0),
2456 PROC(READDIR, readdir, readdir, 3),
2457 PROC(READDIRPLUS, readdirplus, readdir, 3),
2458 PROC(FSSTAT, getattr, fsstat, 0),
2459 PROC(FSINFO, getattr, fsinfo, 0),
2460 PROC(PATHCONF, getattr, pathconf, 0),
2461 PROC(COMMIT, commit, commit, 5),
2462};
2463
2464struct rpc_version nfs_version3 = {
2465 .number = 3,
2466 .nrprocs = ARRAY_SIZE(nfs3_procedures),
2467 .procs = nfs3_procedures
2468};
2469
2470#ifdef CONFIG_NFS_V3_ACL
2471static struct rpc_procinfo nfs3_acl_procedures[] = {
2472 [ACLPROC3_GETACL] = {
2473 .p_proc = ACLPROC3_GETACL,
2474 .p_encode = (kxdreproc_t)nfs3_xdr_enc_getacl3args,
2475 .p_decode = (kxdrdproc_t)nfs3_xdr_dec_getacl3res,
2476 .p_arglen = ACL3_getaclargs_sz,
2477 .p_replen = ACL3_getaclres_sz,
2478 .p_timer = 1,
2479 .p_name = "GETACL",
2480 },
2481 [ACLPROC3_SETACL] = {
2482 .p_proc = ACLPROC3_SETACL,
2483 .p_encode = (kxdreproc_t)nfs3_xdr_enc_setacl3args,
2484 .p_decode = (kxdrdproc_t)nfs3_xdr_dec_setacl3res,
2485 .p_arglen = ACL3_setaclargs_sz,
2486 .p_replen = ACL3_setaclres_sz,
2487 .p_timer = 0,
2488 .p_name = "SETACL",
2489 },
2490};
2491
2492struct rpc_version nfsacl_version3 = {
2493 .number = 3,
2494 .nrprocs = sizeof(nfs3_acl_procedures)/
2495 sizeof(nfs3_acl_procedures[0]),
2496 .procs = nfs3_acl_procedures,
2497};
2498#endif
2499