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9#include <linux/types.h>
10#include <linux/time.h>
11#include <linux/nfs.h>
12#include <linux/vfs.h>
13#include <linux/sunrpc/xdr.h>
14#include <linux/sunrpc/svc.h>
15#include <linux/nfsd/nfsd.h>
16#include <linux/nfsd/xdr.h>
17#include <linux/mm.h>
18
19#define NFSDDBG_FACILITY NFSDDBG_XDR
20
21
22
23
24static u32 nfs_ftypes[] = {
25 NFNON, NFCHR, NFCHR, NFBAD,
26 NFDIR, NFBAD, NFBLK, NFBAD,
27 NFREG, NFBAD, NFLNK, NFBAD,
28 NFSOCK, NFBAD, NFLNK, NFBAD,
29};
30
31
32
33
34
35static __be32 *
36decode_fh(__be32 *p, struct svc_fh *fhp)
37{
38 fh_init(fhp, NFS_FHSIZE);
39 memcpy(&fhp->fh_handle.fh_base, p, NFS_FHSIZE);
40 fhp->fh_handle.fh_size = NFS_FHSIZE;
41
42
43
44 return p + (NFS_FHSIZE >> 2);
45}
46
47
48__be32 *nfs2svc_decode_fh(__be32 *p, struct svc_fh *fhp)
49{
50 return decode_fh(p, fhp);
51}
52
53static __be32 *
54encode_fh(__be32 *p, struct svc_fh *fhp)
55{
56 memcpy(p, &fhp->fh_handle.fh_base, NFS_FHSIZE);
57 return p + (NFS_FHSIZE>> 2);
58}
59
60
61
62
63
64static __be32 *
65decode_filename(__be32 *p, char **namp, int *lenp)
66{
67 char *name;
68 int i;
69
70 if ((p = xdr_decode_string_inplace(p, namp, lenp, NFS_MAXNAMLEN)) != NULL) {
71 for (i = 0, name = *namp; i < *lenp; i++, name++) {
72 if (*name == '\0' || *name == '/')
73 return NULL;
74 }
75 }
76
77 return p;
78}
79
80static __be32 *
81decode_pathname(__be32 *p, char **namp, int *lenp)
82{
83 char *name;
84 int i;
85
86 if ((p = xdr_decode_string_inplace(p, namp, lenp, NFS_MAXPATHLEN)) != NULL) {
87 for (i = 0, name = *namp; i < *lenp; i++, name++) {
88 if (*name == '\0')
89 return NULL;
90 }
91 }
92
93 return p;
94}
95
96static __be32 *
97decode_sattr(__be32 *p, struct iattr *iap)
98{
99 u32 tmp, tmp1;
100
101 iap->ia_valid = 0;
102
103
104
105
106
107 if ((tmp = ntohl(*p++)) != (u32)-1 && tmp != 0xffff) {
108 iap->ia_valid |= ATTR_MODE;
109 iap->ia_mode = tmp;
110 }
111 if ((tmp = ntohl(*p++)) != (u32)-1) {
112 iap->ia_valid |= ATTR_UID;
113 iap->ia_uid = tmp;
114 }
115 if ((tmp = ntohl(*p++)) != (u32)-1) {
116 iap->ia_valid |= ATTR_GID;
117 iap->ia_gid = tmp;
118 }
119 if ((tmp = ntohl(*p++)) != (u32)-1) {
120 iap->ia_valid |= ATTR_SIZE;
121 iap->ia_size = tmp;
122 }
123 tmp = ntohl(*p++); tmp1 = ntohl(*p++);
124 if (tmp != (u32)-1 && tmp1 != (u32)-1) {
125 iap->ia_valid |= ATTR_ATIME | ATTR_ATIME_SET;
126 iap->ia_atime.tv_sec = tmp;
127 iap->ia_atime.tv_nsec = tmp1 * 1000;
128 }
129 tmp = ntohl(*p++); tmp1 = ntohl(*p++);
130 if (tmp != (u32)-1 && tmp1 != (u32)-1) {
131 iap->ia_valid |= ATTR_MTIME | ATTR_MTIME_SET;
132 iap->ia_mtime.tv_sec = tmp;
133 iap->ia_mtime.tv_nsec = tmp1 * 1000;
134
135
136
137
138
139
140
141
142
143 if (tmp1 == 1000000)
144 iap->ia_valid &= ~(ATTR_ATIME_SET|ATTR_MTIME_SET);
145 }
146 return p;
147}
148
149static __be32 *
150encode_fattr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp,
151 struct kstat *stat)
152{
153 struct dentry *dentry = fhp->fh_dentry;
154 int type;
155 struct timespec time;
156 u32 f;
157
158 type = (stat->mode & S_IFMT);
159
160 *p++ = htonl(nfs_ftypes[type >> 12]);
161 *p++ = htonl((u32) stat->mode);
162 *p++ = htonl((u32) stat->nlink);
163 *p++ = htonl((u32) nfsd_ruid(rqstp, stat->uid));
164 *p++ = htonl((u32) nfsd_rgid(rqstp, stat->gid));
165
166 if (S_ISLNK(type) && stat->size > NFS_MAXPATHLEN) {
167 *p++ = htonl(NFS_MAXPATHLEN);
168 } else {
169 *p++ = htonl((u32) stat->size);
170 }
171 *p++ = htonl((u32) stat->blksize);
172 if (S_ISCHR(type) || S_ISBLK(type))
173 *p++ = htonl(new_encode_dev(stat->rdev));
174 else
175 *p++ = htonl(0xffffffff);
176 *p++ = htonl((u32) stat->blocks);
177 switch (fsid_source(fhp)) {
178 default:
179 case FSIDSOURCE_DEV:
180 *p++ = htonl(new_encode_dev(stat->dev));
181 break;
182 case FSIDSOURCE_FSID:
183 *p++ = htonl((u32) fhp->fh_export->ex_fsid);
184 break;
185 case FSIDSOURCE_UUID:
186 f = ((u32*)fhp->fh_export->ex_uuid)[0];
187 f ^= ((u32*)fhp->fh_export->ex_uuid)[1];
188 f ^= ((u32*)fhp->fh_export->ex_uuid)[2];
189 f ^= ((u32*)fhp->fh_export->ex_uuid)[3];
190 *p++ = htonl(f);
191 break;
192 }
193 *p++ = htonl((u32) stat->ino);
194 *p++ = htonl((u32) stat->atime.tv_sec);
195 *p++ = htonl(stat->atime.tv_nsec ? stat->atime.tv_nsec / 1000 : 0);
196 lease_get_mtime(dentry->d_inode, &time);
197 *p++ = htonl((u32) time.tv_sec);
198 *p++ = htonl(time.tv_nsec ? time.tv_nsec / 1000 : 0);
199 *p++ = htonl((u32) stat->ctime.tv_sec);
200 *p++ = htonl(stat->ctime.tv_nsec ? stat->ctime.tv_nsec / 1000 : 0);
201
202 return p;
203}
204
205
206__be32 *nfs2svc_encode_fattr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp)
207{
208 struct kstat stat;
209 vfs_getattr(fhp->fh_export->ex_mnt, fhp->fh_dentry, &stat);
210 return encode_fattr(rqstp, p, fhp, &stat);
211}
212
213
214
215
216int
217nfssvc_decode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy)
218{
219 return xdr_argsize_check(rqstp, p);
220}
221
222int
223nfssvc_decode_fhandle(struct svc_rqst *rqstp, __be32 *p, struct nfsd_fhandle *args)
224{
225 if (!(p = decode_fh(p, &args->fh)))
226 return 0;
227 return xdr_argsize_check(rqstp, p);
228}
229
230int
231nfssvc_decode_sattrargs(struct svc_rqst *rqstp, __be32 *p,
232 struct nfsd_sattrargs *args)
233{
234 p = decode_fh(p, &args->fh);
235 if (!p)
236 return 0;
237 p = decode_sattr(p, &args->attrs);
238
239 return xdr_argsize_check(rqstp, p);
240}
241
242int
243nfssvc_decode_diropargs(struct svc_rqst *rqstp, __be32 *p,
244 struct nfsd_diropargs *args)
245{
246 if (!(p = decode_fh(p, &args->fh))
247 || !(p = decode_filename(p, &args->name, &args->len)))
248 return 0;
249
250 return xdr_argsize_check(rqstp, p);
251}
252
253int
254nfssvc_decode_readargs(struct svc_rqst *rqstp, __be32 *p,
255 struct nfsd_readargs *args)
256{
257 unsigned int len;
258 int v,pn;
259 if (!(p = decode_fh(p, &args->fh)))
260 return 0;
261
262 args->offset = ntohl(*p++);
263 len = args->count = ntohl(*p++);
264 p++;
265
266 if (len > NFSSVC_MAXBLKSIZE_V2)
267 len = NFSSVC_MAXBLKSIZE_V2;
268
269
270
271
272 v=0;
273 while (len > 0) {
274 pn = rqstp->rq_resused++;
275 rqstp->rq_vec[v].iov_base = page_address(rqstp->rq_respages[pn]);
276 rqstp->rq_vec[v].iov_len = len < PAGE_SIZE?len:PAGE_SIZE;
277 len -= rqstp->rq_vec[v].iov_len;
278 v++;
279 }
280 args->vlen = v;
281 return xdr_argsize_check(rqstp, p);
282}
283
284int
285nfssvc_decode_writeargs(struct svc_rqst *rqstp, __be32 *p,
286 struct nfsd_writeargs *args)
287{
288 unsigned int len, hdr, dlen;
289 int v;
290
291 if (!(p = decode_fh(p, &args->fh)))
292 return 0;
293
294 p++;
295 args->offset = ntohl(*p++);
296 p++;
297 len = args->len = ntohl(*p++);
298
299
300
301 if (len > NFSSVC_MAXBLKSIZE_V2)
302 return 0;
303
304
305
306
307
308 hdr = (void*)p - rqstp->rq_arg.head[0].iov_base;
309 dlen = rqstp->rq_arg.head[0].iov_len + rqstp->rq_arg.page_len
310 - hdr;
311
312
313
314
315
316
317
318
319
320 if (dlen < XDR_QUADLEN(len)*4)
321 return 0;
322
323 rqstp->rq_vec[0].iov_base = (void*)p;
324 rqstp->rq_vec[0].iov_len = rqstp->rq_arg.head[0].iov_len - hdr;
325 v = 0;
326 while (len > rqstp->rq_vec[v].iov_len) {
327 len -= rqstp->rq_vec[v].iov_len;
328 v++;
329 rqstp->rq_vec[v].iov_base = page_address(rqstp->rq_pages[v]);
330 rqstp->rq_vec[v].iov_len = PAGE_SIZE;
331 }
332 rqstp->rq_vec[v].iov_len = len;
333 args->vlen = v + 1;
334 return 1;
335}
336
337int
338nfssvc_decode_createargs(struct svc_rqst *rqstp, __be32 *p,
339 struct nfsd_createargs *args)
340{
341 if ( !(p = decode_fh(p, &args->fh))
342 || !(p = decode_filename(p, &args->name, &args->len)))
343 return 0;
344 p = decode_sattr(p, &args->attrs);
345
346 return xdr_argsize_check(rqstp, p);
347}
348
349int
350nfssvc_decode_renameargs(struct svc_rqst *rqstp, __be32 *p,
351 struct nfsd_renameargs *args)
352{
353 if (!(p = decode_fh(p, &args->ffh))
354 || !(p = decode_filename(p, &args->fname, &args->flen))
355 || !(p = decode_fh(p, &args->tfh))
356 || !(p = decode_filename(p, &args->tname, &args->tlen)))
357 return 0;
358
359 return xdr_argsize_check(rqstp, p);
360}
361
362int
363nfssvc_decode_readlinkargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd_readlinkargs *args)
364{
365 if (!(p = decode_fh(p, &args->fh)))
366 return 0;
367 args->buffer = page_address(rqstp->rq_respages[rqstp->rq_resused++]);
368
369 return xdr_argsize_check(rqstp, p);
370}
371
372int
373nfssvc_decode_linkargs(struct svc_rqst *rqstp, __be32 *p,
374 struct nfsd_linkargs *args)
375{
376 if (!(p = decode_fh(p, &args->ffh))
377 || !(p = decode_fh(p, &args->tfh))
378 || !(p = decode_filename(p, &args->tname, &args->tlen)))
379 return 0;
380
381 return xdr_argsize_check(rqstp, p);
382}
383
384int
385nfssvc_decode_symlinkargs(struct svc_rqst *rqstp, __be32 *p,
386 struct nfsd_symlinkargs *args)
387{
388 if ( !(p = decode_fh(p, &args->ffh))
389 || !(p = decode_filename(p, &args->fname, &args->flen))
390 || !(p = decode_pathname(p, &args->tname, &args->tlen)))
391 return 0;
392 p = decode_sattr(p, &args->attrs);
393
394 return xdr_argsize_check(rqstp, p);
395}
396
397int
398nfssvc_decode_readdirargs(struct svc_rqst *rqstp, __be32 *p,
399 struct nfsd_readdirargs *args)
400{
401 if (!(p = decode_fh(p, &args->fh)))
402 return 0;
403 args->cookie = ntohl(*p++);
404 args->count = ntohl(*p++);
405 if (args->count > PAGE_SIZE)
406 args->count = PAGE_SIZE;
407
408 args->buffer = page_address(rqstp->rq_respages[rqstp->rq_resused++]);
409
410 return xdr_argsize_check(rqstp, p);
411}
412
413
414
415
416int
417nfssvc_encode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy)
418{
419 return xdr_ressize_check(rqstp, p);
420}
421
422int
423nfssvc_encode_attrstat(struct svc_rqst *rqstp, __be32 *p,
424 struct nfsd_attrstat *resp)
425{
426 p = encode_fattr(rqstp, p, &resp->fh, &resp->stat);
427 return xdr_ressize_check(rqstp, p);
428}
429
430int
431nfssvc_encode_diropres(struct svc_rqst *rqstp, __be32 *p,
432 struct nfsd_diropres *resp)
433{
434 p = encode_fh(p, &resp->fh);
435 p = encode_fattr(rqstp, p, &resp->fh, &resp->stat);
436 return xdr_ressize_check(rqstp, p);
437}
438
439int
440nfssvc_encode_readlinkres(struct svc_rqst *rqstp, __be32 *p,
441 struct nfsd_readlinkres *resp)
442{
443 *p++ = htonl(resp->len);
444 xdr_ressize_check(rqstp, p);
445 rqstp->rq_res.page_len = resp->len;
446 if (resp->len & 3) {
447
448 rqstp->rq_res.tail[0].iov_base = p;
449 *p = 0;
450 rqstp->rq_res.tail[0].iov_len = 4 - (resp->len&3);
451 }
452 return 1;
453}
454
455int
456nfssvc_encode_readres(struct svc_rqst *rqstp, __be32 *p,
457 struct nfsd_readres *resp)
458{
459 p = encode_fattr(rqstp, p, &resp->fh, &resp->stat);
460 *p++ = htonl(resp->count);
461 xdr_ressize_check(rqstp, p);
462
463
464 rqstp->rq_res.page_len = resp->count;
465 if (resp->count & 3) {
466
467 rqstp->rq_res.tail[0].iov_base = p;
468 *p = 0;
469 rqstp->rq_res.tail[0].iov_len = 4 - (resp->count&3);
470 }
471 return 1;
472}
473
474int
475nfssvc_encode_readdirres(struct svc_rqst *rqstp, __be32 *p,
476 struct nfsd_readdirres *resp)
477{
478 xdr_ressize_check(rqstp, p);
479 p = resp->buffer;
480 *p++ = 0;
481 *p++ = htonl((resp->common.err == nfserr_eof));
482 rqstp->rq_res.page_len = (((unsigned long)p-1) & ~PAGE_MASK)+1;
483
484 return 1;
485}
486
487int
488nfssvc_encode_statfsres(struct svc_rqst *rqstp, __be32 *p,
489 struct nfsd_statfsres *resp)
490{
491 struct kstatfs *stat = &resp->stats;
492
493 *p++ = htonl(NFSSVC_MAXBLKSIZE_V2);
494 *p++ = htonl(stat->f_bsize);
495 *p++ = htonl(stat->f_blocks);
496 *p++ = htonl(stat->f_bfree);
497 *p++ = htonl(stat->f_bavail);
498 return xdr_ressize_check(rqstp, p);
499}
500
501int
502nfssvc_encode_entry(void *ccdv, const char *name,
503 int namlen, loff_t offset, u64 ino, unsigned int d_type)
504{
505 struct readdir_cd *ccd = ccdv;
506 struct nfsd_readdirres *cd = container_of(ccd, struct nfsd_readdirres, common);
507 __be32 *p = cd->buffer;
508 int buflen, slen;
509
510
511
512
513
514
515 if (offset > ~((u32) 0)) {
516 cd->common.err = nfserr_fbig;
517 return -EINVAL;
518 }
519 if (cd->offset)
520 *cd->offset = htonl(offset);
521 if (namlen > NFS2_MAXNAMLEN)
522 namlen = NFS2_MAXNAMLEN;
523
524 slen = XDR_QUADLEN(namlen);
525 if ((buflen = cd->buflen - slen - 4) < 0) {
526 cd->common.err = nfserr_toosmall;
527 return -EINVAL;
528 }
529 if (ino > ~((u32) 0)) {
530 cd->common.err = nfserr_fbig;
531 return -EINVAL;
532 }
533 *p++ = xdr_one;
534 *p++ = htonl((u32) ino);
535 p = xdr_encode_array(p, name, namlen);
536 cd->offset = p;
537 *p++ = htonl(~0U);
538
539 cd->buflen = buflen;
540 cd->buffer = p;
541 cd->common.err = nfs_ok;
542 return 0;
543}
544
545
546
547
548int
549nfssvc_release_fhandle(struct svc_rqst *rqstp, __be32 *p,
550 struct nfsd_fhandle *resp)
551{
552 fh_put(&resp->fh);
553 return 1;
554}
555