1
2
3
4
5
6
7
8
9
10#include <linux/namei.h>
11#include <linux/sunrpc/svc_xprt.h>
12#include "xdr3.h"
13#include "auth.h"
14#include "netns.h"
15#include "vfs.h"
16
17#define NFSDDBG_FACILITY NFSDDBG_XDR
18
19
20
21
22
23static u32 nfs3_ftypes[] = {
24 NF3NON, NF3FIFO, NF3CHR, NF3BAD,
25 NF3DIR, NF3BAD, NF3BLK, NF3BAD,
26 NF3REG, NF3BAD, NF3LNK, NF3BAD,
27 NF3SOCK, NF3BAD, NF3LNK, NF3BAD,
28};
29
30
31
32
33
34static __be32 *
35encode_time3(__be32 *p, struct timespec64 *time)
36{
37 *p++ = htonl((u32) time->tv_sec); *p++ = htonl(time->tv_nsec);
38 return p;
39}
40
41static __be32 *
42decode_time3(__be32 *p, struct timespec64 *time)
43{
44 time->tv_sec = ntohl(*p++);
45 time->tv_nsec = ntohl(*p++);
46 return p;
47}
48
49static __be32 *
50decode_fh(__be32 *p, struct svc_fh *fhp)
51{
52 unsigned int size;
53 fh_init(fhp, NFS3_FHSIZE);
54 size = ntohl(*p++);
55 if (size > NFS3_FHSIZE)
56 return NULL;
57
58 memcpy(&fhp->fh_handle.fh_base, p, size);
59 fhp->fh_handle.fh_size = size;
60 return p + XDR_QUADLEN(size);
61}
62
63
64__be32 *nfs3svc_decode_fh(__be32 *p, struct svc_fh *fhp)
65{
66 return decode_fh(p, fhp);
67}
68
69static __be32 *
70encode_fh(__be32 *p, struct svc_fh *fhp)
71{
72 unsigned int size = fhp->fh_handle.fh_size;
73 *p++ = htonl(size);
74 if (size) p[XDR_QUADLEN(size)-1]=0;
75 memcpy(p, &fhp->fh_handle.fh_base, size);
76 return p + XDR_QUADLEN(size);
77}
78
79
80
81
82
83static __be32 *
84decode_filename(__be32 *p, char **namp, unsigned int *lenp)
85{
86 char *name;
87 unsigned int i;
88
89 if ((p = xdr_decode_string_inplace(p, namp, lenp, NFS3_MAXNAMLEN)) != NULL) {
90 for (i = 0, name = *namp; i < *lenp; i++, name++) {
91 if (*name == '\0' || *name == '/')
92 return NULL;
93 }
94 }
95
96 return p;
97}
98
99static __be32 *
100decode_sattr3(__be32 *p, struct iattr *iap, struct user_namespace *userns)
101{
102 u32 tmp;
103
104 iap->ia_valid = 0;
105
106 if (*p++) {
107 iap->ia_valid |= ATTR_MODE;
108 iap->ia_mode = ntohl(*p++);
109 }
110 if (*p++) {
111 iap->ia_uid = make_kuid(userns, ntohl(*p++));
112 if (uid_valid(iap->ia_uid))
113 iap->ia_valid |= ATTR_UID;
114 }
115 if (*p++) {
116 iap->ia_gid = make_kgid(userns, ntohl(*p++));
117 if (gid_valid(iap->ia_gid))
118 iap->ia_valid |= ATTR_GID;
119 }
120 if (*p++) {
121 u64 newsize;
122
123 iap->ia_valid |= ATTR_SIZE;
124 p = xdr_decode_hyper(p, &newsize);
125 iap->ia_size = min_t(u64, newsize, NFS_OFFSET_MAX);
126 }
127 if ((tmp = ntohl(*p++)) == 1) {
128 iap->ia_valid |= ATTR_ATIME;
129 } else if (tmp == 2) {
130 iap->ia_valid |= ATTR_ATIME | ATTR_ATIME_SET;
131 iap->ia_atime.tv_sec = ntohl(*p++);
132 iap->ia_atime.tv_nsec = ntohl(*p++);
133 }
134 if ((tmp = ntohl(*p++)) == 1) {
135 iap->ia_valid |= ATTR_MTIME;
136 } else if (tmp == 2) {
137 iap->ia_valid |= ATTR_MTIME | ATTR_MTIME_SET;
138 iap->ia_mtime.tv_sec = ntohl(*p++);
139 iap->ia_mtime.tv_nsec = ntohl(*p++);
140 }
141 return p;
142}
143
144static __be32 *encode_fsid(__be32 *p, struct svc_fh *fhp)
145{
146 u64 f;
147 switch(fsid_source(fhp)) {
148 default:
149 case FSIDSOURCE_DEV:
150 p = xdr_encode_hyper(p, (u64)huge_encode_dev
151 (fhp->fh_dentry->d_sb->s_dev));
152 break;
153 case FSIDSOURCE_FSID:
154 p = xdr_encode_hyper(p, (u64) fhp->fh_export->ex_fsid);
155 break;
156 case FSIDSOURCE_UUID:
157 f = ((u64*)fhp->fh_export->ex_uuid)[0];
158 f ^= ((u64*)fhp->fh_export->ex_uuid)[1];
159 p = xdr_encode_hyper(p, f);
160 break;
161 }
162 return p;
163}
164
165static __be32 *
166encode_fattr3(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp,
167 struct kstat *stat)
168{
169 struct user_namespace *userns = nfsd_user_namespace(rqstp);
170 *p++ = htonl(nfs3_ftypes[(stat->mode & S_IFMT) >> 12]);
171 *p++ = htonl((u32) (stat->mode & S_IALLUGO));
172 *p++ = htonl((u32) stat->nlink);
173 *p++ = htonl((u32) from_kuid_munged(userns, stat->uid));
174 *p++ = htonl((u32) from_kgid_munged(userns, stat->gid));
175 if (S_ISLNK(stat->mode) && stat->size > NFS3_MAXPATHLEN) {
176 p = xdr_encode_hyper(p, (u64) NFS3_MAXPATHLEN);
177 } else {
178 p = xdr_encode_hyper(p, (u64) stat->size);
179 }
180 p = xdr_encode_hyper(p, ((u64)stat->blocks) << 9);
181 *p++ = htonl((u32) MAJOR(stat->rdev));
182 *p++ = htonl((u32) MINOR(stat->rdev));
183 p = encode_fsid(p, fhp);
184 p = xdr_encode_hyper(p, stat->ino);
185 p = encode_time3(p, &stat->atime);
186 p = encode_time3(p, &stat->mtime);
187 p = encode_time3(p, &stat->ctime);
188
189 return p;
190}
191
192static __be32 *
193encode_saved_post_attr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp)
194{
195
196 *p++ = xdr_one;
197 return encode_fattr3(rqstp, p, fhp, &fhp->fh_post_attr);
198}
199
200
201
202
203
204
205static __be32 *
206encode_post_op_attr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp)
207{
208 struct dentry *dentry = fhp->fh_dentry;
209 if (dentry && d_really_is_positive(dentry)) {
210 __be32 err;
211 struct kstat stat;
212
213 err = fh_getattr(fhp, &stat);
214 if (!err) {
215 *p++ = xdr_one;
216 lease_get_mtime(d_inode(dentry), &stat.mtime);
217 return encode_fattr3(rqstp, p, fhp, &stat);
218 }
219 }
220 *p++ = xdr_zero;
221 return p;
222}
223
224
225__be32 *
226nfs3svc_encode_post_op_attr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp)
227{
228 return encode_post_op_attr(rqstp, p, fhp);
229}
230
231
232
233
234static __be32 *
235encode_wcc_data(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp)
236{
237 struct dentry *dentry = fhp->fh_dentry;
238
239 if (dentry && d_really_is_positive(dentry) && fhp->fh_post_saved) {
240 if (fhp->fh_pre_saved) {
241 *p++ = xdr_one;
242 p = xdr_encode_hyper(p, (u64) fhp->fh_pre_size);
243 p = encode_time3(p, &fhp->fh_pre_mtime);
244 p = encode_time3(p, &fhp->fh_pre_ctime);
245 } else {
246 *p++ = xdr_zero;
247 }
248 return encode_saved_post_attr(rqstp, p, fhp);
249 }
250
251 *p++ = xdr_zero;
252 return encode_post_op_attr(rqstp, p, fhp);
253}
254
255
256
257
258void fill_pre_wcc(struct svc_fh *fhp)
259{
260 struct inode *inode;
261 struct kstat stat;
262 __be32 err;
263
264 if (fhp->fh_pre_saved)
265 return;
266
267 inode = d_inode(fhp->fh_dentry);
268 err = fh_getattr(fhp, &stat);
269 if (err) {
270
271 stat.mtime = inode->i_mtime;
272 stat.ctime = inode->i_ctime;
273 stat.size = inode->i_size;
274 }
275
276 fhp->fh_pre_mtime = stat.mtime;
277 fhp->fh_pre_ctime = stat.ctime;
278 fhp->fh_pre_size = stat.size;
279 fhp->fh_pre_change = nfsd4_change_attribute(&stat, inode);
280 fhp->fh_pre_saved = true;
281}
282
283
284
285
286void fill_post_wcc(struct svc_fh *fhp)
287{
288 __be32 err;
289
290 if (fhp->fh_post_saved)
291 printk("nfsd: inode locked twice during operation.\n");
292
293 err = fh_getattr(fhp, &fhp->fh_post_attr);
294 fhp->fh_post_change = nfsd4_change_attribute(&fhp->fh_post_attr,
295 d_inode(fhp->fh_dentry));
296 if (err) {
297 fhp->fh_post_saved = false;
298
299 fhp->fh_post_attr.ctime = d_inode(fhp->fh_dentry)->i_ctime;
300 } else
301 fhp->fh_post_saved = true;
302}
303
304
305
306
307int
308nfs3svc_decode_fhandle(struct svc_rqst *rqstp, __be32 *p)
309{
310 struct nfsd_fhandle *args = rqstp->rq_argp;
311
312 p = decode_fh(p, &args->fh);
313 if (!p)
314 return 0;
315 return xdr_argsize_check(rqstp, p);
316}
317
318int
319nfs3svc_decode_sattrargs(struct svc_rqst *rqstp, __be32 *p)
320{
321 struct nfsd3_sattrargs *args = rqstp->rq_argp;
322
323 p = decode_fh(p, &args->fh);
324 if (!p)
325 return 0;
326 p = decode_sattr3(p, &args->attrs, nfsd_user_namespace(rqstp));
327
328 if ((args->check_guard = ntohl(*p++)) != 0) {
329 struct timespec64 time;
330 p = decode_time3(p, &time);
331 args->guardtime = time.tv_sec;
332 }
333
334 return xdr_argsize_check(rqstp, p);
335}
336
337int
338nfs3svc_decode_diropargs(struct svc_rqst *rqstp, __be32 *p)
339{
340 struct nfsd3_diropargs *args = rqstp->rq_argp;
341
342 if (!(p = decode_fh(p, &args->fh))
343 || !(p = decode_filename(p, &args->name, &args->len)))
344 return 0;
345
346 return xdr_argsize_check(rqstp, p);
347}
348
349int
350nfs3svc_decode_accessargs(struct svc_rqst *rqstp, __be32 *p)
351{
352 struct nfsd3_accessargs *args = rqstp->rq_argp;
353
354 p = decode_fh(p, &args->fh);
355 if (!p)
356 return 0;
357 args->access = ntohl(*p++);
358
359 return xdr_argsize_check(rqstp, p);
360}
361
362int
363nfs3svc_decode_readargs(struct svc_rqst *rqstp, __be32 *p)
364{
365 struct nfsd3_readargs *args = rqstp->rq_argp;
366 unsigned int len;
367 int v;
368 u32 max_blocksize = svc_max_payload(rqstp);
369
370 p = decode_fh(p, &args->fh);
371 if (!p)
372 return 0;
373 p = xdr_decode_hyper(p, &args->offset);
374
375 args->count = ntohl(*p++);
376 len = min(args->count, max_blocksize);
377
378
379 v=0;
380 while (len > 0) {
381 struct page *p = *(rqstp->rq_next_page++);
382
383 rqstp->rq_vec[v].iov_base = page_address(p);
384 rqstp->rq_vec[v].iov_len = min_t(unsigned int, len, PAGE_SIZE);
385 len -= rqstp->rq_vec[v].iov_len;
386 v++;
387 }
388 args->vlen = v;
389 return xdr_argsize_check(rqstp, p);
390}
391
392int
393nfs3svc_decode_writeargs(struct svc_rqst *rqstp, __be32 *p)
394{
395 struct nfsd3_writeargs *args = rqstp->rq_argp;
396 unsigned int len, hdr, dlen;
397 u32 max_blocksize = svc_max_payload(rqstp);
398 struct kvec *head = rqstp->rq_arg.head;
399 struct kvec *tail = rqstp->rq_arg.tail;
400
401 p = decode_fh(p, &args->fh);
402 if (!p)
403 return 0;
404 p = xdr_decode_hyper(p, &args->offset);
405
406 args->count = ntohl(*p++);
407 args->stable = ntohl(*p++);
408 len = args->len = ntohl(*p++);
409 if ((void *)p > head->iov_base + head->iov_len)
410 return 0;
411
412
413
414 if (args->count != args->len)
415 return 0;
416
417
418
419
420
421 hdr = (void*)p - head->iov_base;
422 dlen = head->iov_len + rqstp->rq_arg.page_len + tail->iov_len - hdr;
423
424
425
426
427
428
429
430
431 if (dlen < XDR_QUADLEN(len)*4)
432 return 0;
433
434 if (args->count > max_blocksize) {
435 args->count = max_blocksize;
436 len = args->len = max_blocksize;
437 }
438
439 args->first.iov_base = (void *)p;
440 args->first.iov_len = head->iov_len - hdr;
441 return 1;
442}
443
444int
445nfs3svc_decode_createargs(struct svc_rqst *rqstp, __be32 *p)
446{
447 struct nfsd3_createargs *args = rqstp->rq_argp;
448
449 if (!(p = decode_fh(p, &args->fh))
450 || !(p = decode_filename(p, &args->name, &args->len)))
451 return 0;
452
453 switch (args->createmode = ntohl(*p++)) {
454 case NFS3_CREATE_UNCHECKED:
455 case NFS3_CREATE_GUARDED:
456 p = decode_sattr3(p, &args->attrs, nfsd_user_namespace(rqstp));
457 break;
458 case NFS3_CREATE_EXCLUSIVE:
459 args->verf = p;
460 p += 2;
461 break;
462 default:
463 return 0;
464 }
465
466 return xdr_argsize_check(rqstp, p);
467}
468
469int
470nfs3svc_decode_mkdirargs(struct svc_rqst *rqstp, __be32 *p)
471{
472 struct nfsd3_createargs *args = rqstp->rq_argp;
473
474 if (!(p = decode_fh(p, &args->fh)) ||
475 !(p = decode_filename(p, &args->name, &args->len)))
476 return 0;
477 p = decode_sattr3(p, &args->attrs, nfsd_user_namespace(rqstp));
478
479 return xdr_argsize_check(rqstp, p);
480}
481
482int
483nfs3svc_decode_symlinkargs(struct svc_rqst *rqstp, __be32 *p)
484{
485 struct nfsd3_symlinkargs *args = rqstp->rq_argp;
486 char *base = (char *)p;
487 size_t dlen;
488
489 if (!(p = decode_fh(p, &args->ffh)) ||
490 !(p = decode_filename(p, &args->fname, &args->flen)))
491 return 0;
492 p = decode_sattr3(p, &args->attrs, nfsd_user_namespace(rqstp));
493
494 args->tlen = ntohl(*p++);
495
496 args->first.iov_base = p;
497 args->first.iov_len = rqstp->rq_arg.head[0].iov_len;
498 args->first.iov_len -= (char *)p - base;
499
500 dlen = args->first.iov_len + rqstp->rq_arg.page_len +
501 rqstp->rq_arg.tail[0].iov_len;
502 if (dlen < XDR_QUADLEN(args->tlen) << 2)
503 return 0;
504 return 1;
505}
506
507int
508nfs3svc_decode_mknodargs(struct svc_rqst *rqstp, __be32 *p)
509{
510 struct nfsd3_mknodargs *args = rqstp->rq_argp;
511
512 if (!(p = decode_fh(p, &args->fh))
513 || !(p = decode_filename(p, &args->name, &args->len)))
514 return 0;
515
516 args->ftype = ntohl(*p++);
517
518 if (args->ftype == NF3BLK || args->ftype == NF3CHR
519 || args->ftype == NF3SOCK || args->ftype == NF3FIFO)
520 p = decode_sattr3(p, &args->attrs, nfsd_user_namespace(rqstp));
521
522 if (args->ftype == NF3BLK || args->ftype == NF3CHR) {
523 args->major = ntohl(*p++);
524 args->minor = ntohl(*p++);
525 }
526
527 return xdr_argsize_check(rqstp, p);
528}
529
530int
531nfs3svc_decode_renameargs(struct svc_rqst *rqstp, __be32 *p)
532{
533 struct nfsd3_renameargs *args = rqstp->rq_argp;
534
535 if (!(p = decode_fh(p, &args->ffh))
536 || !(p = decode_filename(p, &args->fname, &args->flen))
537 || !(p = decode_fh(p, &args->tfh))
538 || !(p = decode_filename(p, &args->tname, &args->tlen)))
539 return 0;
540
541 return xdr_argsize_check(rqstp, p);
542}
543
544int
545nfs3svc_decode_readlinkargs(struct svc_rqst *rqstp, __be32 *p)
546{
547 struct nfsd3_readlinkargs *args = rqstp->rq_argp;
548
549 p = decode_fh(p, &args->fh);
550 if (!p)
551 return 0;
552 args->buffer = page_address(*(rqstp->rq_next_page++));
553
554 return xdr_argsize_check(rqstp, p);
555}
556
557int
558nfs3svc_decode_linkargs(struct svc_rqst *rqstp, __be32 *p)
559{
560 struct nfsd3_linkargs *args = rqstp->rq_argp;
561
562 if (!(p = decode_fh(p, &args->ffh))
563 || !(p = decode_fh(p, &args->tfh))
564 || !(p = decode_filename(p, &args->tname, &args->tlen)))
565 return 0;
566
567 return xdr_argsize_check(rqstp, p);
568}
569
570int
571nfs3svc_decode_readdirargs(struct svc_rqst *rqstp, __be32 *p)
572{
573 struct nfsd3_readdirargs *args = rqstp->rq_argp;
574 int len;
575 u32 max_blocksize = svc_max_payload(rqstp);
576
577 p = decode_fh(p, &args->fh);
578 if (!p)
579 return 0;
580 p = xdr_decode_hyper(p, &args->cookie);
581 args->verf = p; p += 2;
582 args->dircount = ~0;
583 args->count = ntohl(*p++);
584 len = args->count = min_t(u32, args->count, max_blocksize);
585
586 while (len > 0) {
587 struct page *p = *(rqstp->rq_next_page++);
588 if (!args->buffer)
589 args->buffer = page_address(p);
590 len -= PAGE_SIZE;
591 }
592
593 return xdr_argsize_check(rqstp, p);
594}
595
596int
597nfs3svc_decode_readdirplusargs(struct svc_rqst *rqstp, __be32 *p)
598{
599 struct nfsd3_readdirargs *args = rqstp->rq_argp;
600 int len;
601 u32 max_blocksize = svc_max_payload(rqstp);
602
603 p = decode_fh(p, &args->fh);
604 if (!p)
605 return 0;
606 p = xdr_decode_hyper(p, &args->cookie);
607 args->verf = p; p += 2;
608 args->dircount = ntohl(*p++);
609 args->count = ntohl(*p++);
610
611 len = args->count = min(args->count, max_blocksize);
612 while (len > 0) {
613 struct page *p = *(rqstp->rq_next_page++);
614 if (!args->buffer)
615 args->buffer = page_address(p);
616 len -= PAGE_SIZE;
617 }
618
619 return xdr_argsize_check(rqstp, p);
620}
621
622int
623nfs3svc_decode_commitargs(struct svc_rqst *rqstp, __be32 *p)
624{
625 struct nfsd3_commitargs *args = rqstp->rq_argp;
626 p = decode_fh(p, &args->fh);
627 if (!p)
628 return 0;
629 p = xdr_decode_hyper(p, &args->offset);
630 args->count = ntohl(*p++);
631
632 return xdr_argsize_check(rqstp, p);
633}
634
635
636
637
638
639
640
641
642int
643nfs3svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p)
644{
645 return xdr_ressize_check(rqstp, p);
646}
647
648
649int
650nfs3svc_encode_attrstat(struct svc_rqst *rqstp, __be32 *p)
651{
652 struct nfsd3_attrstat *resp = rqstp->rq_resp;
653
654 if (resp->status == 0) {
655 lease_get_mtime(d_inode(resp->fh.fh_dentry),
656 &resp->stat.mtime);
657 p = encode_fattr3(rqstp, p, &resp->fh, &resp->stat);
658 }
659 return xdr_ressize_check(rqstp, p);
660}
661
662
663int
664nfs3svc_encode_wccstat(struct svc_rqst *rqstp, __be32 *p)
665{
666 struct nfsd3_attrstat *resp = rqstp->rq_resp;
667
668 p = encode_wcc_data(rqstp, p, &resp->fh);
669 return xdr_ressize_check(rqstp, p);
670}
671
672
673int
674nfs3svc_encode_diropres(struct svc_rqst *rqstp, __be32 *p)
675{
676 struct nfsd3_diropres *resp = rqstp->rq_resp;
677
678 if (resp->status == 0) {
679 p = encode_fh(p, &resp->fh);
680 p = encode_post_op_attr(rqstp, p, &resp->fh);
681 }
682 p = encode_post_op_attr(rqstp, p, &resp->dirfh);
683 return xdr_ressize_check(rqstp, p);
684}
685
686
687int
688nfs3svc_encode_accessres(struct svc_rqst *rqstp, __be32 *p)
689{
690 struct nfsd3_accessres *resp = rqstp->rq_resp;
691
692 p = encode_post_op_attr(rqstp, p, &resp->fh);
693 if (resp->status == 0)
694 *p++ = htonl(resp->access);
695 return xdr_ressize_check(rqstp, p);
696}
697
698
699int
700nfs3svc_encode_readlinkres(struct svc_rqst *rqstp, __be32 *p)
701{
702 struct nfsd3_readlinkres *resp = rqstp->rq_resp;
703
704 p = encode_post_op_attr(rqstp, p, &resp->fh);
705 if (resp->status == 0) {
706 *p++ = htonl(resp->len);
707 xdr_ressize_check(rqstp, p);
708 rqstp->rq_res.page_len = resp->len;
709 if (resp->len & 3) {
710
711 rqstp->rq_res.tail[0].iov_base = p;
712 *p = 0;
713 rqstp->rq_res.tail[0].iov_len = 4 - (resp->len&3);
714 }
715 return 1;
716 } else
717 return xdr_ressize_check(rqstp, p);
718}
719
720
721int
722nfs3svc_encode_readres(struct svc_rqst *rqstp, __be32 *p)
723{
724 struct nfsd3_readres *resp = rqstp->rq_resp;
725
726 p = encode_post_op_attr(rqstp, p, &resp->fh);
727 if (resp->status == 0) {
728 *p++ = htonl(resp->count);
729 *p++ = htonl(resp->eof);
730 *p++ = htonl(resp->count);
731 xdr_ressize_check(rqstp, p);
732
733 rqstp->rq_res.page_len = resp->count;
734 if (resp->count & 3) {
735
736 rqstp->rq_res.tail[0].iov_base = p;
737 *p = 0;
738 rqstp->rq_res.tail[0].iov_len = 4 - (resp->count & 3);
739 }
740 return 1;
741 } else
742 return xdr_ressize_check(rqstp, p);
743}
744
745
746int
747nfs3svc_encode_writeres(struct svc_rqst *rqstp, __be32 *p)
748{
749 struct nfsd3_writeres *resp = rqstp->rq_resp;
750
751 p = encode_wcc_data(rqstp, p, &resp->fh);
752 if (resp->status == 0) {
753 *p++ = htonl(resp->count);
754 *p++ = htonl(resp->committed);
755 *p++ = resp->verf[0];
756 *p++ = resp->verf[1];
757 }
758 return xdr_ressize_check(rqstp, p);
759}
760
761
762int
763nfs3svc_encode_createres(struct svc_rqst *rqstp, __be32 *p)
764{
765 struct nfsd3_diropres *resp = rqstp->rq_resp;
766
767 if (resp->status == 0) {
768 *p++ = xdr_one;
769 p = encode_fh(p, &resp->fh);
770 p = encode_post_op_attr(rqstp, p, &resp->fh);
771 }
772 p = encode_wcc_data(rqstp, p, &resp->dirfh);
773 return xdr_ressize_check(rqstp, p);
774}
775
776
777int
778nfs3svc_encode_renameres(struct svc_rqst *rqstp, __be32 *p)
779{
780 struct nfsd3_renameres *resp = rqstp->rq_resp;
781
782 p = encode_wcc_data(rqstp, p, &resp->ffh);
783 p = encode_wcc_data(rqstp, p, &resp->tfh);
784 return xdr_ressize_check(rqstp, p);
785}
786
787
788int
789nfs3svc_encode_linkres(struct svc_rqst *rqstp, __be32 *p)
790{
791 struct nfsd3_linkres *resp = rqstp->rq_resp;
792
793 p = encode_post_op_attr(rqstp, p, &resp->fh);
794 p = encode_wcc_data(rqstp, p, &resp->tfh);
795 return xdr_ressize_check(rqstp, p);
796}
797
798
799int
800nfs3svc_encode_readdirres(struct svc_rqst *rqstp, __be32 *p)
801{
802 struct nfsd3_readdirres *resp = rqstp->rq_resp;
803
804 p = encode_post_op_attr(rqstp, p, &resp->fh);
805
806 if (resp->status == 0) {
807
808 memcpy(p, resp->verf, 8); p += 2;
809 xdr_ressize_check(rqstp, p);
810 if (rqstp->rq_res.head[0].iov_len + (2<<2) > PAGE_SIZE)
811 return 1;
812 rqstp->rq_res.page_len = (resp->count) << 2;
813
814
815 rqstp->rq_res.tail[0].iov_base = p;
816 *p++ = 0;
817 *p++ = htonl(resp->common.err == nfserr_eof);
818 rqstp->rq_res.tail[0].iov_len = 2<<2;
819 return 1;
820 } else
821 return xdr_ressize_check(rqstp, p);
822}
823
824static __be32 *
825encode_entry_baggage(struct nfsd3_readdirres *cd, __be32 *p, const char *name,
826 int namlen, u64 ino)
827{
828 *p++ = xdr_one;
829 p = xdr_encode_hyper(p, ino);
830 p = xdr_encode_array(p, name, namlen);
831
832 cd->offset = p;
833 p = xdr_encode_hyper(p, NFS_OFFSET_MAX);
834
835 return p;
836}
837
838static __be32
839compose_entry_fh(struct nfsd3_readdirres *cd, struct svc_fh *fhp,
840 const char *name, int namlen, u64 ino)
841{
842 struct svc_export *exp;
843 struct dentry *dparent, *dchild;
844 __be32 rv = nfserr_noent;
845
846 dparent = cd->fh.fh_dentry;
847 exp = cd->fh.fh_export;
848
849 if (isdotent(name, namlen)) {
850 if (namlen == 2) {
851 dchild = dget_parent(dparent);
852
853 if (dchild == dparent)
854 goto out;
855 } else
856 dchild = dget(dparent);
857 } else
858 dchild = lookup_positive_unlocked(name, dparent, namlen);
859 if (IS_ERR(dchild))
860 return rv;
861 if (d_mountpoint(dchild))
862 goto out;
863 if (dchild->d_inode->i_ino != ino)
864 goto out;
865 rv = fh_compose(fhp, exp, dchild, &cd->fh);
866out:
867 dput(dchild);
868 return rv;
869}
870
871static __be32 *encode_entryplus_baggage(struct nfsd3_readdirres *cd, __be32 *p, const char *name, int namlen, u64 ino)
872{
873 struct svc_fh *fh = &cd->scratch;
874 __be32 err;
875
876 fh_init(fh, NFS3_FHSIZE);
877 err = compose_entry_fh(cd, fh, name, namlen, ino);
878 if (err) {
879 *p++ = 0;
880 *p++ = 0;
881 goto out;
882 }
883 p = encode_post_op_attr(cd->rqstp, p, fh);
884 *p++ = xdr_one;
885 p = encode_fh(p, fh);
886out:
887 fh_put(fh);
888 return p;
889}
890
891
892
893
894
895
896
897
898
899
900
901#define NFS3_ENTRY_BAGGAGE (2 + 1 + 2 + 1)
902#define NFS3_ENTRYPLUS_BAGGAGE (1 + 21 + 1 + (NFS3_FHSIZE >> 2))
903static int
904encode_entry(struct readdir_cd *ccd, const char *name, int namlen,
905 loff_t offset, u64 ino, unsigned int d_type, int plus)
906{
907 struct nfsd3_readdirres *cd = container_of(ccd, struct nfsd3_readdirres,
908 common);
909 __be32 *p = cd->buffer;
910 caddr_t curr_page_addr = NULL;
911 struct page ** page;
912 int slen;
913 int elen;
914 int num_entry_words = 0;
915
916 if (cd->offset) {
917 u64 offset64 = offset;
918
919 if (unlikely(cd->offset1)) {
920
921 *cd->offset = htonl(offset64 >> 32);
922 *cd->offset1 = htonl(offset64 & 0xffffffff);
923 cd->offset1 = NULL;
924 } else {
925 xdr_encode_hyper(cd->offset, offset64);
926 }
927 cd->offset = NULL;
928 }
929
930
931
932
933
934
935
936 namlen = min(namlen, NFS3_MAXNAMLEN);
937
938 slen = XDR_QUADLEN(namlen);
939 elen = slen + NFS3_ENTRY_BAGGAGE
940 + (plus? NFS3_ENTRYPLUS_BAGGAGE : 0);
941
942 if (cd->buflen < elen) {
943 cd->common.err = nfserr_toosmall;
944 return -EINVAL;
945 }
946
947
948 for (page = cd->rqstp->rq_respages + 1;
949 page < cd->rqstp->rq_next_page; page++) {
950 curr_page_addr = page_address(*page);
951
952 if (((caddr_t)cd->buffer >= curr_page_addr) &&
953 ((caddr_t)cd->buffer < curr_page_addr + PAGE_SIZE))
954 break;
955 }
956
957 if ((caddr_t)(cd->buffer + elen) < (curr_page_addr + PAGE_SIZE)) {
958
959
960 p = encode_entry_baggage(cd, p, name, namlen, ino);
961
962 if (plus)
963 p = encode_entryplus_baggage(cd, p, name, namlen, ino);
964 num_entry_words = p - cd->buffer;
965 } else if (*(page+1) != NULL) {
966
967
968 __be32 *p1, *tmp;
969 int len1, len2;
970
971
972 p1 = tmp = page_address(*(page+1));
973
974 p1 = encode_entry_baggage(cd, p1, name, namlen, ino);
975
976 if (plus)
977 p1 = encode_entryplus_baggage(cd, p1, name, namlen, ino);
978
979
980 num_entry_words = p1 - tmp;
981 len1 = curr_page_addr + PAGE_SIZE - (caddr_t)cd->buffer;
982 if ((num_entry_words << 2) < len1) {
983
984
985
986 memmove(p, tmp, num_entry_words << 2);
987 p += num_entry_words;
988
989
990 cd->offset = cd->buffer + (cd->offset - tmp);
991 } else {
992 unsigned int offset_r = (cd->offset - tmp) << 2;
993
994
995
996
997
998
999
1000
1001 if (offset_r + 8 <= len1) {
1002 cd->offset = p + (cd->offset - tmp);
1003 } else if (offset_r >= len1) {
1004 cd->offset -= len1 >> 2;
1005 } else {
1006
1007 BUG_ON(offset_r != len1 - 4);
1008 cd->offset = p + (cd->offset - tmp);
1009 cd->offset1 = tmp;
1010 }
1011
1012 len2 = (num_entry_words << 2) - len1;
1013
1014
1015 memmove(p, tmp, len1);
1016 memmove(tmp, (caddr_t)tmp+len1, len2);
1017
1018 p = tmp + (len2 >> 2);
1019 }
1020 }
1021 else {
1022 cd->common.err = nfserr_toosmall;
1023 return -EINVAL;
1024 }
1025
1026 cd->buflen -= num_entry_words;
1027 cd->buffer = p;
1028 cd->common.err = nfs_ok;
1029 return 0;
1030
1031}
1032
1033int
1034nfs3svc_encode_entry(void *cd, const char *name,
1035 int namlen, loff_t offset, u64 ino, unsigned int d_type)
1036{
1037 return encode_entry(cd, name, namlen, offset, ino, d_type, 0);
1038}
1039
1040int
1041nfs3svc_encode_entry_plus(void *cd, const char *name,
1042 int namlen, loff_t offset, u64 ino,
1043 unsigned int d_type)
1044{
1045 return encode_entry(cd, name, namlen, offset, ino, d_type, 1);
1046}
1047
1048
1049int
1050nfs3svc_encode_fsstatres(struct svc_rqst *rqstp, __be32 *p)
1051{
1052 struct nfsd3_fsstatres *resp = rqstp->rq_resp;
1053 struct kstatfs *s = &resp->stats;
1054 u64 bs = s->f_bsize;
1055
1056 *p++ = xdr_zero;
1057
1058 if (resp->status == 0) {
1059 p = xdr_encode_hyper(p, bs * s->f_blocks);
1060 p = xdr_encode_hyper(p, bs * s->f_bfree);
1061 p = xdr_encode_hyper(p, bs * s->f_bavail);
1062 p = xdr_encode_hyper(p, s->f_files);
1063 p = xdr_encode_hyper(p, s->f_ffree);
1064 p = xdr_encode_hyper(p, s->f_ffree);
1065 *p++ = htonl(resp->invarsec);
1066 }
1067 return xdr_ressize_check(rqstp, p);
1068}
1069
1070
1071int
1072nfs3svc_encode_fsinfores(struct svc_rqst *rqstp, __be32 *p)
1073{
1074 struct nfsd3_fsinfores *resp = rqstp->rq_resp;
1075
1076 *p++ = xdr_zero;
1077
1078 if (resp->status == 0) {
1079 *p++ = htonl(resp->f_rtmax);
1080 *p++ = htonl(resp->f_rtpref);
1081 *p++ = htonl(resp->f_rtmult);
1082 *p++ = htonl(resp->f_wtmax);
1083 *p++ = htonl(resp->f_wtpref);
1084 *p++ = htonl(resp->f_wtmult);
1085 *p++ = htonl(resp->f_dtpref);
1086 p = xdr_encode_hyper(p, resp->f_maxfilesize);
1087 *p++ = xdr_one;
1088 *p++ = xdr_zero;
1089 *p++ = htonl(resp->f_properties);
1090 }
1091
1092 return xdr_ressize_check(rqstp, p);
1093}
1094
1095
1096int
1097nfs3svc_encode_pathconfres(struct svc_rqst *rqstp, __be32 *p)
1098{
1099 struct nfsd3_pathconfres *resp = rqstp->rq_resp;
1100
1101 *p++ = xdr_zero;
1102
1103 if (resp->status == 0) {
1104 *p++ = htonl(resp->p_link_max);
1105 *p++ = htonl(resp->p_name_max);
1106 *p++ = htonl(resp->p_no_trunc);
1107 *p++ = htonl(resp->p_chown_restricted);
1108 *p++ = htonl(resp->p_case_insensitive);
1109 *p++ = htonl(resp->p_case_preserving);
1110 }
1111
1112 return xdr_ressize_check(rqstp, p);
1113}
1114
1115
1116int
1117nfs3svc_encode_commitres(struct svc_rqst *rqstp, __be32 *p)
1118{
1119 struct nfsd3_commitres *resp = rqstp->rq_resp;
1120
1121 p = encode_wcc_data(rqstp, p, &resp->fh);
1122
1123 if (resp->status == 0) {
1124 *p++ = resp->verf[0];
1125 *p++ = resp->verf[1];
1126 }
1127 return xdr_ressize_check(rqstp, p);
1128}
1129
1130
1131
1132
1133void
1134nfs3svc_release_fhandle(struct svc_rqst *rqstp)
1135{
1136 struct nfsd3_attrstat *resp = rqstp->rq_resp;
1137
1138 fh_put(&resp->fh);
1139}
1140
1141void
1142nfs3svc_release_fhandle2(struct svc_rqst *rqstp)
1143{
1144 struct nfsd3_fhandle_pair *resp = rqstp->rq_resp;
1145
1146 fh_put(&resp->fh1);
1147 fh_put(&resp->fh2);
1148}
1149