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12#include <linux/param.h>
13#include <linux/time.h>
14#include <linux/mm.h>
15#include <linux/errno.h>
16#include <linux/string.h>
17#include <linux/in.h>
18#include <linux/pagemap.h>
19#include <linux/proc_fs.h>
20#include <linux/sunrpc/clnt.h>
21#include <linux/nfs.h>
22#include <linux/nfs2.h>
23#include <linux/nfs_fs.h>
24#include "internal.h"
25
26#define NFSDBG_FACILITY NFSDBG_XDR
27
28
29#define errno_NFSERR_IO EIO
30
31
32
33
34
35#define NFS_fhandle_sz (8)
36#define NFS_sattr_sz (8)
37#define NFS_filename_sz (1+(NFS2_MAXNAMLEN>>2))
38#define NFS_path_sz (1+(NFS2_MAXPATHLEN>>2))
39#define NFS_fattr_sz (17)
40#define NFS_info_sz (5)
41#define NFS_entry_sz (NFS_filename_sz+3)
42
43#define NFS_diropargs_sz (NFS_fhandle_sz+NFS_filename_sz)
44#define NFS_removeargs_sz (NFS_fhandle_sz+NFS_filename_sz)
45#define NFS_sattrargs_sz (NFS_fhandle_sz+NFS_sattr_sz)
46#define NFS_readlinkargs_sz (NFS_fhandle_sz)
47#define NFS_readargs_sz (NFS_fhandle_sz+3)
48#define NFS_writeargs_sz (NFS_fhandle_sz+4)
49#define NFS_createargs_sz (NFS_diropargs_sz+NFS_sattr_sz)
50#define NFS_renameargs_sz (NFS_diropargs_sz+NFS_diropargs_sz)
51#define NFS_linkargs_sz (NFS_fhandle_sz+NFS_diropargs_sz)
52#define NFS_symlinkargs_sz (NFS_diropargs_sz+1+NFS_sattr_sz)
53#define NFS_readdirargs_sz (NFS_fhandle_sz+2)
54
55#define NFS_attrstat_sz (1+NFS_fattr_sz)
56#define NFS_diropres_sz (1+NFS_fhandle_sz+NFS_fattr_sz)
57#define NFS_readlinkres_sz (2)
58#define NFS_readres_sz (1+NFS_fattr_sz+1)
59#define NFS_writeres_sz (NFS_attrstat_sz)
60#define NFS_stat_sz (1)
61#define NFS_readdirres_sz (1)
62#define NFS_statfsres_sz (1+NFS_info_sz)
63
64static int nfs_stat_to_errno(enum nfs_stat);
65
66
67
68
69
70static void prepare_reply_buffer(struct rpc_rqst *req, struct page **pages,
71 unsigned int base, unsigned int len,
72 unsigned int bufsize)
73{
74 struct rpc_auth *auth = req->rq_cred->cr_auth;
75 unsigned int replen;
76
77 replen = RPC_REPHDRSIZE + auth->au_rslack + bufsize;
78 xdr_inline_pages(&req->rq_rcv_buf, replen << 2, pages, base, len);
79}
80
81
82
83
84static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
85{
86 dprintk("NFS: %s prematurely hit the end of our receive buffer. "
87 "Remaining buffer length is %tu words.\n",
88 func, xdr->end - xdr->p);
89}
90
91
92
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95
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103
104
105
106static int decode_nfsdata(struct xdr_stream *xdr, struct nfs_readres *result)
107{
108 u32 recvd, count;
109 __be32 *p;
110
111 p = xdr_inline_decode(xdr, 4);
112 if (unlikely(p == NULL))
113 goto out_overflow;
114 count = be32_to_cpup(p);
115 recvd = xdr_read_pages(xdr, count);
116 if (unlikely(count > recvd))
117 goto out_cheating;
118out:
119 result->eof = 0;
120 result->count = count;
121 return count;
122out_cheating:
123 dprintk("NFS: server cheating in read result: "
124 "count %u > recvd %u\n", count, recvd);
125 count = recvd;
126 goto out;
127out_overflow:
128 print_overflow_msg(__func__, xdr);
129 return -EIO;
130}
131
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152
153
154static int decode_stat(struct xdr_stream *xdr, enum nfs_stat *status)
155{
156 __be32 *p;
157
158 p = xdr_inline_decode(xdr, 4);
159 if (unlikely(p == NULL))
160 goto out_overflow;
161 *status = be32_to_cpup(p);
162 return 0;
163out_overflow:
164 print_overflow_msg(__func__, xdr);
165 return -EIO;
166}
167
168
169
170
171
172
173
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178
179
180
181static __be32 *xdr_decode_ftype(__be32 *p, u32 *type)
182{
183 *type = be32_to_cpup(p++);
184 if (unlikely(*type > NF2FIFO))
185 *type = NFBAD;
186 return p;
187}
188
189
190
191
192
193
194static void encode_fhandle(struct xdr_stream *xdr, const struct nfs_fh *fh)
195{
196 __be32 *p;
197
198 p = xdr_reserve_space(xdr, NFS2_FHSIZE);
199 memcpy(p, fh->data, NFS2_FHSIZE);
200}
201
202static int decode_fhandle(struct xdr_stream *xdr, struct nfs_fh *fh)
203{
204 __be32 *p;
205
206 p = xdr_inline_decode(xdr, NFS2_FHSIZE);
207 if (unlikely(p == NULL))
208 goto out_overflow;
209 fh->size = NFS2_FHSIZE;
210 memcpy(fh->data, p, NFS2_FHSIZE);
211 return 0;
212out_overflow:
213 print_overflow_msg(__func__, xdr);
214 return -EIO;
215}
216
217
218
219
220
221
222
223
224
225static __be32 *xdr_encode_time(__be32 *p, const struct timespec *timep)
226{
227 *p++ = cpu_to_be32(timep->tv_sec);
228 if (timep->tv_nsec != 0)
229 *p++ = cpu_to_be32(timep->tv_nsec / NSEC_PER_USEC);
230 else
231 *p++ = cpu_to_be32(0);
232 return p;
233}
234
235
236
237
238
239
240
241
242static __be32 *xdr_encode_current_server_time(__be32 *p,
243 const struct timespec *timep)
244{
245 *p++ = cpu_to_be32(timep->tv_sec);
246 *p++ = cpu_to_be32(1000000);
247 return p;
248}
249
250static __be32 *xdr_decode_time(__be32 *p, struct timespec *timep)
251{
252 timep->tv_sec = be32_to_cpup(p++);
253 timep->tv_nsec = be32_to_cpup(p++) * NSEC_PER_USEC;
254 return p;
255}
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277
278static int decode_fattr(struct xdr_stream *xdr, struct nfs_fattr *fattr)
279{
280 u32 rdev, type;
281 __be32 *p;
282
283 p = xdr_inline_decode(xdr, NFS_fattr_sz << 2);
284 if (unlikely(p == NULL))
285 goto out_overflow;
286
287 fattr->valid |= NFS_ATTR_FATTR_V2;
288
289 p = xdr_decode_ftype(p, &type);
290
291 fattr->mode = be32_to_cpup(p++);
292 fattr->nlink = be32_to_cpup(p++);
293 fattr->uid = make_kuid(&init_user_ns, be32_to_cpup(p++));
294 if (!uid_valid(fattr->uid))
295 goto out_uid;
296 fattr->gid = make_kgid(&init_user_ns, be32_to_cpup(p++));
297 if (!gid_valid(fattr->gid))
298 goto out_gid;
299
300 fattr->size = be32_to_cpup(p++);
301 fattr->du.nfs2.blocksize = be32_to_cpup(p++);
302
303 rdev = be32_to_cpup(p++);
304 fattr->rdev = new_decode_dev(rdev);
305 if (type == (u32)NFCHR && rdev == (u32)NFS2_FIFO_DEV) {
306 fattr->mode = (fattr->mode & ~S_IFMT) | S_IFIFO;
307 fattr->rdev = 0;
308 }
309
310 fattr->du.nfs2.blocks = be32_to_cpup(p++);
311 fattr->fsid.major = be32_to_cpup(p++);
312 fattr->fsid.minor = 0;
313 fattr->fileid = be32_to_cpup(p++);
314
315 p = xdr_decode_time(p, &fattr->atime);
316 p = xdr_decode_time(p, &fattr->mtime);
317 xdr_decode_time(p, &fattr->ctime);
318 fattr->change_attr = nfs_timespec_to_change_attr(&fattr->ctime);
319
320 return 0;
321out_uid:
322 dprintk("NFS: returned invalid uid\n");
323 return -EINVAL;
324out_gid:
325 dprintk("NFS: returned invalid gid\n");
326 return -EINVAL;
327out_overflow:
328 print_overflow_msg(__func__, xdr);
329 return -EIO;
330}
331
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335
336
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338
339
340
341
342
343
344
345#define NFS2_SATTR_NOT_SET (0xffffffff)
346
347static __be32 *xdr_time_not_set(__be32 *p)
348{
349 *p++ = cpu_to_be32(NFS2_SATTR_NOT_SET);
350 *p++ = cpu_to_be32(NFS2_SATTR_NOT_SET);
351 return p;
352}
353
354static void encode_sattr(struct xdr_stream *xdr, const struct iattr *attr)
355{
356 __be32 *p;
357
358 p = xdr_reserve_space(xdr, NFS_sattr_sz << 2);
359
360 if (attr->ia_valid & ATTR_MODE)
361 *p++ = cpu_to_be32(attr->ia_mode);
362 else
363 *p++ = cpu_to_be32(NFS2_SATTR_NOT_SET);
364 if (attr->ia_valid & ATTR_UID)
365 *p++ = cpu_to_be32(from_kuid(&init_user_ns, attr->ia_uid));
366 else
367 *p++ = cpu_to_be32(NFS2_SATTR_NOT_SET);
368 if (attr->ia_valid & ATTR_GID)
369 *p++ = cpu_to_be32(from_kgid(&init_user_ns, attr->ia_gid));
370 else
371 *p++ = cpu_to_be32(NFS2_SATTR_NOT_SET);
372 if (attr->ia_valid & ATTR_SIZE)
373 *p++ = cpu_to_be32((u32)attr->ia_size);
374 else
375 *p++ = cpu_to_be32(NFS2_SATTR_NOT_SET);
376
377 if (attr->ia_valid & ATTR_ATIME_SET)
378 p = xdr_encode_time(p, &attr->ia_atime);
379 else if (attr->ia_valid & ATTR_ATIME)
380 p = xdr_encode_current_server_time(p, &attr->ia_atime);
381 else
382 p = xdr_time_not_set(p);
383 if (attr->ia_valid & ATTR_MTIME_SET)
384 xdr_encode_time(p, &attr->ia_mtime);
385 else if (attr->ia_valid & ATTR_MTIME)
386 xdr_encode_current_server_time(p, &attr->ia_mtime);
387 else
388 xdr_time_not_set(p);
389}
390
391
392
393
394
395
396static void encode_filename(struct xdr_stream *xdr,
397 const char *name, u32 length)
398{
399 __be32 *p;
400
401 WARN_ON_ONCE(length > NFS2_MAXNAMLEN);
402 p = xdr_reserve_space(xdr, 4 + length);
403 xdr_encode_opaque(p, name, length);
404}
405
406static int decode_filename_inline(struct xdr_stream *xdr,
407 const char **name, u32 *length)
408{
409 __be32 *p;
410 u32 count;
411
412 p = xdr_inline_decode(xdr, 4);
413 if (unlikely(p == NULL))
414 goto out_overflow;
415 count = be32_to_cpup(p);
416 if (count > NFS3_MAXNAMLEN)
417 goto out_nametoolong;
418 p = xdr_inline_decode(xdr, count);
419 if (unlikely(p == NULL))
420 goto out_overflow;
421 *name = (const char *)p;
422 *length = count;
423 return 0;
424out_nametoolong:
425 dprintk("NFS: returned filename too long: %u\n", count);
426 return -ENAMETOOLONG;
427out_overflow:
428 print_overflow_msg(__func__, xdr);
429 return -EIO;
430}
431
432
433
434
435
436
437static void encode_path(struct xdr_stream *xdr, struct page **pages, u32 length)
438{
439 __be32 *p;
440
441 p = xdr_reserve_space(xdr, 4);
442 *p = cpu_to_be32(length);
443 xdr_write_pages(xdr, pages, 0, length);
444}
445
446static int decode_path(struct xdr_stream *xdr)
447{
448 u32 length, recvd;
449 __be32 *p;
450
451 p = xdr_inline_decode(xdr, 4);
452 if (unlikely(p == NULL))
453 goto out_overflow;
454 length = be32_to_cpup(p);
455 if (unlikely(length >= xdr->buf->page_len || length > NFS_MAXPATHLEN))
456 goto out_size;
457 recvd = xdr_read_pages(xdr, length);
458 if (unlikely(length > recvd))
459 goto out_cheating;
460 xdr_terminate_string(xdr->buf, length);
461 return 0;
462out_size:
463 dprintk("NFS: returned pathname too long: %u\n", length);
464 return -ENAMETOOLONG;
465out_cheating:
466 dprintk("NFS: server cheating in pathname result: "
467 "length %u > received %u\n", length, recvd);
468 return -EIO;
469out_overflow:
470 print_overflow_msg(__func__, xdr);
471 return -EIO;
472}
473
474
475
476
477
478
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481
482
483
484static int decode_attrstat(struct xdr_stream *xdr, struct nfs_fattr *result)
485{
486 enum nfs_stat status;
487 int error;
488
489 error = decode_stat(xdr, &status);
490 if (unlikely(error))
491 goto out;
492 if (status != NFS_OK)
493 goto out_default;
494 error = decode_fattr(xdr, result);
495out:
496 return error;
497out_default:
498 return nfs_stat_to_errno(status);
499}
500
501
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503
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506
507
508
509static void encode_diropargs(struct xdr_stream *xdr, const struct nfs_fh *fh,
510 const char *name, u32 length)
511{
512 encode_fhandle(xdr, fh);
513 encode_filename(xdr, name, length);
514}
515
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517
518
519
520
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527
528
529static int decode_diropok(struct xdr_stream *xdr, struct nfs_diropok *result)
530{
531 int error;
532
533 error = decode_fhandle(xdr, result->fh);
534 if (unlikely(error))
535 goto out;
536 error = decode_fattr(xdr, result->fattr);
537out:
538 return error;
539}
540
541static int decode_diropres(struct xdr_stream *xdr, struct nfs_diropok *result)
542{
543 enum nfs_stat status;
544 int error;
545
546 error = decode_stat(xdr, &status);
547 if (unlikely(error))
548 goto out;
549 if (status != NFS_OK)
550 goto out_default;
551 error = decode_diropok(xdr, result);
552out:
553 return error;
554out_default:
555 return nfs_stat_to_errno(status);
556}
557
558
559
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564
565
566static void nfs2_xdr_enc_fhandle(struct rpc_rqst *req,
567 struct xdr_stream *xdr,
568 const struct nfs_fh *fh)
569{
570 encode_fhandle(xdr, fh);
571}
572
573
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575
576
577
578
579
580
581static void nfs2_xdr_enc_sattrargs(struct rpc_rqst *req,
582 struct xdr_stream *xdr,
583 const struct nfs_sattrargs *args)
584{
585 encode_fhandle(xdr, args->fh);
586 encode_sattr(xdr, args->sattr);
587}
588
589static void nfs2_xdr_enc_diropargs(struct rpc_rqst *req,
590 struct xdr_stream *xdr,
591 const struct nfs_diropargs *args)
592{
593 encode_diropargs(xdr, args->fh, args->name, args->len);
594}
595
596static void nfs2_xdr_enc_readlinkargs(struct rpc_rqst *req,
597 struct xdr_stream *xdr,
598 const struct nfs_readlinkargs *args)
599{
600 encode_fhandle(xdr, args->fh);
601 prepare_reply_buffer(req, args->pages, args->pgbase,
602 args->pglen, NFS_readlinkres_sz);
603}
604
605
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608
609
610
611
612
613
614
615static void encode_readargs(struct xdr_stream *xdr,
616 const struct nfs_readargs *args)
617{
618 u32 offset = args->offset;
619 u32 count = args->count;
620 __be32 *p;
621
622 encode_fhandle(xdr, args->fh);
623
624 p = xdr_reserve_space(xdr, 4 + 4 + 4);
625 *p++ = cpu_to_be32(offset);
626 *p++ = cpu_to_be32(count);
627 *p = cpu_to_be32(count);
628}
629
630static void nfs2_xdr_enc_readargs(struct rpc_rqst *req,
631 struct xdr_stream *xdr,
632 const struct nfs_readargs *args)
633{
634 encode_readargs(xdr, args);
635 prepare_reply_buffer(req, args->pages, args->pgbase,
636 args->count, NFS_readres_sz);
637 req->rq_rcv_buf.flags |= XDRBUF_READ;
638}
639
640
641
642
643
644
645
646
647
648
649
650
651static void encode_writeargs(struct xdr_stream *xdr,
652 const struct nfs_writeargs *args)
653{
654 u32 offset = args->offset;
655 u32 count = args->count;
656 __be32 *p;
657
658 encode_fhandle(xdr, args->fh);
659
660 p = xdr_reserve_space(xdr, 4 + 4 + 4 + 4);
661 *p++ = cpu_to_be32(offset);
662 *p++ = cpu_to_be32(offset);
663 *p++ = cpu_to_be32(count);
664
665
666 *p = cpu_to_be32(count);
667 xdr_write_pages(xdr, args->pages, args->pgbase, count);
668}
669
670static void nfs2_xdr_enc_writeargs(struct rpc_rqst *req,
671 struct xdr_stream *xdr,
672 const struct nfs_writeargs *args)
673{
674 encode_writeargs(xdr, args);
675 xdr->buf->flags |= XDRBUF_WRITE;
676}
677
678
679
680
681
682
683
684
685
686static void nfs2_xdr_enc_createargs(struct rpc_rqst *req,
687 struct xdr_stream *xdr,
688 const struct nfs_createargs *args)
689{
690 encode_diropargs(xdr, args->fh, args->name, args->len);
691 encode_sattr(xdr, args->sattr);
692}
693
694static void nfs2_xdr_enc_removeargs(struct rpc_rqst *req,
695 struct xdr_stream *xdr,
696 const struct nfs_removeargs *args)
697{
698 encode_diropargs(xdr, args->fh, args->name.name, args->name.len);
699}
700
701
702
703
704
705
706
707
708
709static void nfs2_xdr_enc_renameargs(struct rpc_rqst *req,
710 struct xdr_stream *xdr,
711 const struct nfs_renameargs *args)
712{
713 const struct qstr *old = args->old_name;
714 const struct qstr *new = args->new_name;
715
716 encode_diropargs(xdr, args->old_dir, old->name, old->len);
717 encode_diropargs(xdr, args->new_dir, new->name, new->len);
718}
719
720
721
722
723
724
725
726
727
728static void nfs2_xdr_enc_linkargs(struct rpc_rqst *req,
729 struct xdr_stream *xdr,
730 const struct nfs_linkargs *args)
731{
732 encode_fhandle(xdr, args->fromfh);
733 encode_diropargs(xdr, args->tofh, args->toname, args->tolen);
734}
735
736
737
738
739
740
741
742
743
744
745static void nfs2_xdr_enc_symlinkargs(struct rpc_rqst *req,
746 struct xdr_stream *xdr,
747 const struct nfs_symlinkargs *args)
748{
749 encode_diropargs(xdr, args->fromfh, args->fromname, args->fromlen);
750 encode_path(xdr, args->pages, args->pathlen);
751 encode_sattr(xdr, args->sattr);
752}
753
754
755
756
757
758
759
760
761
762
763static void encode_readdirargs(struct xdr_stream *xdr,
764 const struct nfs_readdirargs *args)
765{
766 __be32 *p;
767
768 encode_fhandle(xdr, args->fh);
769
770 p = xdr_reserve_space(xdr, 4 + 4);
771 *p++ = cpu_to_be32(args->cookie);
772 *p = cpu_to_be32(args->count);
773}
774
775static void nfs2_xdr_enc_readdirargs(struct rpc_rqst *req,
776 struct xdr_stream *xdr,
777 const struct nfs_readdirargs *args)
778{
779 encode_readdirargs(xdr, args);
780 prepare_reply_buffer(req, args->pages, 0,
781 args->count, NFS_readdirres_sz);
782}
783
784
785
786
787
788
789
790
791static int nfs2_xdr_dec_stat(struct rpc_rqst *req, struct xdr_stream *xdr,
792 void *__unused)
793{
794 enum nfs_stat status;
795 int error;
796
797 error = decode_stat(xdr, &status);
798 if (unlikely(error))
799 goto out;
800 if (status != NFS_OK)
801 goto out_default;
802out:
803 return error;
804out_default:
805 return nfs_stat_to_errno(status);
806}
807
808static int nfs2_xdr_dec_attrstat(struct rpc_rqst *req, struct xdr_stream *xdr,
809 struct nfs_fattr *result)
810{
811 return decode_attrstat(xdr, result);
812}
813
814static int nfs2_xdr_dec_diropres(struct rpc_rqst *req, struct xdr_stream *xdr,
815 struct nfs_diropok *result)
816{
817 return decode_diropres(xdr, result);
818}
819
820
821
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823
824
825
826
827
828
829
830static int nfs2_xdr_dec_readlinkres(struct rpc_rqst *req,
831 struct xdr_stream *xdr, void *__unused)
832{
833 enum nfs_stat status;
834 int error;
835
836 error = decode_stat(xdr, &status);
837 if (unlikely(error))
838 goto out;
839 if (status != NFS_OK)
840 goto out_default;
841 error = decode_path(xdr);
842out:
843 return error;
844out_default:
845 return nfs_stat_to_errno(status);
846}
847
848
849
850
851
852
853
854
855
856
857
858
859static int nfs2_xdr_dec_readres(struct rpc_rqst *req, struct xdr_stream *xdr,
860 struct nfs_readres *result)
861{
862 enum nfs_stat status;
863 int error;
864
865 error = decode_stat(xdr, &status);
866 if (unlikely(error))
867 goto out;
868 if (status != NFS_OK)
869 goto out_default;
870 error = decode_fattr(xdr, result->fattr);
871 if (unlikely(error))
872 goto out;
873 error = decode_nfsdata(xdr, result);
874out:
875 return error;
876out_default:
877 return nfs_stat_to_errno(status);
878}
879
880static int nfs2_xdr_dec_writeres(struct rpc_rqst *req, struct xdr_stream *xdr,
881 struct nfs_writeres *result)
882{
883
884 result->verf->committed = NFS_FILE_SYNC;
885 return decode_attrstat(xdr, result->fattr);
886}
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911int nfs2_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
912 int plus)
913{
914 __be32 *p;
915 int error;
916
917 p = xdr_inline_decode(xdr, 4);
918 if (unlikely(p == NULL))
919 goto out_overflow;
920 if (*p++ == xdr_zero) {
921 p = xdr_inline_decode(xdr, 4);
922 if (unlikely(p == NULL))
923 goto out_overflow;
924 if (*p++ == xdr_zero)
925 return -EAGAIN;
926 entry->eof = 1;
927 return -EBADCOOKIE;
928 }
929
930 p = xdr_inline_decode(xdr, 4);
931 if (unlikely(p == NULL))
932 goto out_overflow;
933 entry->ino = be32_to_cpup(p);
934
935 error = decode_filename_inline(xdr, &entry->name, &entry->len);
936 if (unlikely(error))
937 return error;
938
939
940
941
942
943 entry->prev_cookie = entry->cookie;
944 p = xdr_inline_decode(xdr, 4);
945 if (unlikely(p == NULL))
946 goto out_overflow;
947 entry->cookie = be32_to_cpup(p);
948
949 entry->d_type = DT_UNKNOWN;
950
951 return 0;
952
953out_overflow:
954 print_overflow_msg(__func__, xdr);
955 return -EAGAIN;
956}
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975static int decode_readdirok(struct xdr_stream *xdr)
976{
977 return xdr_read_pages(xdr, xdr->buf->page_len);
978}
979
980static int nfs2_xdr_dec_readdirres(struct rpc_rqst *req,
981 struct xdr_stream *xdr, void *__unused)
982{
983 enum nfs_stat status;
984 int error;
985
986 error = decode_stat(xdr, &status);
987 if (unlikely(error))
988 goto out;
989 if (status != NFS_OK)
990 goto out_default;
991 error = decode_readdirok(xdr);
992out:
993 return error;
994out_default:
995 return nfs_stat_to_errno(status);
996}
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014static int decode_info(struct xdr_stream *xdr, struct nfs2_fsstat *result)
1015{
1016 __be32 *p;
1017
1018 p = xdr_inline_decode(xdr, NFS_info_sz << 2);
1019 if (unlikely(p == NULL))
1020 goto out_overflow;
1021 result->tsize = be32_to_cpup(p++);
1022 result->bsize = be32_to_cpup(p++);
1023 result->blocks = be32_to_cpup(p++);
1024 result->bfree = be32_to_cpup(p++);
1025 result->bavail = be32_to_cpup(p);
1026 return 0;
1027out_overflow:
1028 print_overflow_msg(__func__, xdr);
1029 return -EIO;
1030}
1031
1032static int nfs2_xdr_dec_statfsres(struct rpc_rqst *req, struct xdr_stream *xdr,
1033 struct nfs2_fsstat *result)
1034{
1035 enum nfs_stat status;
1036 int error;
1037
1038 error = decode_stat(xdr, &status);
1039 if (unlikely(error))
1040 goto out;
1041 if (status != NFS_OK)
1042 goto out_default;
1043 error = decode_info(xdr, result);
1044out:
1045 return error;
1046out_default:
1047 return nfs_stat_to_errno(status);
1048}
1049
1050
1051
1052
1053
1054
1055static const struct {
1056 int stat;
1057 int errno;
1058} nfs_errtbl[] = {
1059 { NFS_OK, 0 },
1060 { NFSERR_PERM, -EPERM },
1061 { NFSERR_NOENT, -ENOENT },
1062 { NFSERR_IO, -errno_NFSERR_IO},
1063 { NFSERR_NXIO, -ENXIO },
1064
1065 { NFSERR_ACCES, -EACCES },
1066 { NFSERR_EXIST, -EEXIST },
1067 { NFSERR_XDEV, -EXDEV },
1068 { NFSERR_NODEV, -ENODEV },
1069 { NFSERR_NOTDIR, -ENOTDIR },
1070 { NFSERR_ISDIR, -EISDIR },
1071 { NFSERR_INVAL, -EINVAL },
1072 { NFSERR_FBIG, -EFBIG },
1073 { NFSERR_NOSPC, -ENOSPC },
1074 { NFSERR_ROFS, -EROFS },
1075 { NFSERR_MLINK, -EMLINK },
1076 { NFSERR_NAMETOOLONG, -ENAMETOOLONG },
1077 { NFSERR_NOTEMPTY, -ENOTEMPTY },
1078 { NFSERR_DQUOT, -EDQUOT },
1079 { NFSERR_STALE, -ESTALE },
1080 { NFSERR_REMOTE, -EREMOTE },
1081#ifdef EWFLUSH
1082 { NFSERR_WFLUSH, -EWFLUSH },
1083#endif
1084 { NFSERR_BADHANDLE, -EBADHANDLE },
1085 { NFSERR_NOT_SYNC, -ENOTSYNC },
1086 { NFSERR_BAD_COOKIE, -EBADCOOKIE },
1087 { NFSERR_NOTSUPP, -ENOTSUPP },
1088 { NFSERR_TOOSMALL, -ETOOSMALL },
1089 { NFSERR_SERVERFAULT, -EREMOTEIO },
1090 { NFSERR_BADTYPE, -EBADTYPE },
1091 { NFSERR_JUKEBOX, -EJUKEBOX },
1092 { -1, -EIO }
1093};
1094
1095
1096
1097
1098
1099
1100
1101
1102static int nfs_stat_to_errno(enum nfs_stat status)
1103{
1104 int i;
1105
1106 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
1107 if (nfs_errtbl[i].stat == (int)status)
1108 return nfs_errtbl[i].errno;
1109 }
1110 dprintk("NFS: Unrecognized nfs status value: %u\n", status);
1111 return nfs_errtbl[i].errno;
1112}
1113
1114#define PROC(proc, argtype, restype, timer) \
1115[NFSPROC_##proc] = { \
1116 .p_proc = NFSPROC_##proc, \
1117 .p_encode = (kxdreproc_t)nfs2_xdr_enc_##argtype, \
1118 .p_decode = (kxdrdproc_t)nfs2_xdr_dec_##restype, \
1119 .p_arglen = NFS_##argtype##_sz, \
1120 .p_replen = NFS_##restype##_sz, \
1121 .p_timer = timer, \
1122 .p_statidx = NFSPROC_##proc, \
1123 .p_name = #proc, \
1124 }
1125struct rpc_procinfo nfs_procedures[] = {
1126 PROC(GETATTR, fhandle, attrstat, 1),
1127 PROC(SETATTR, sattrargs, attrstat, 0),
1128 PROC(LOOKUP, diropargs, diropres, 2),
1129 PROC(READLINK, readlinkargs, readlinkres, 3),
1130 PROC(READ, readargs, readres, 3),
1131 PROC(WRITE, writeargs, writeres, 4),
1132 PROC(CREATE, createargs, diropres, 0),
1133 PROC(REMOVE, removeargs, stat, 0),
1134 PROC(RENAME, renameargs, stat, 0),
1135 PROC(LINK, linkargs, stat, 0),
1136 PROC(SYMLINK, symlinkargs, stat, 0),
1137 PROC(MKDIR, createargs, diropres, 0),
1138 PROC(RMDIR, diropargs, stat, 0),
1139 PROC(READDIR, readdirargs, readdirres, 3),
1140 PROC(STATFS, fhandle, statfsres, 0),
1141};
1142
1143const struct rpc_version nfs_version2 = {
1144 .number = 2,
1145 .nrprocs = ARRAY_SIZE(nfs_procedures),
1146 .procs = nfs_procedures
1147};
1148