Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
f30c2269 | 2 | * linux/fs/nfsd/nfsxdr.c |
1da177e4 LT |
3 | * |
4 | * XDR support for nfsd | |
5 | * | |
6 | * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de> | |
7 | */ | |
8 | ||
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 | ||
1da177e4 LT |
21 | /* |
22 | * Mapping of S_IF* types to NFS file types | |
23 | */ | |
24 | static 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 | * XDR functions for basic NFS types | |
34 | */ | |
131a21c2 AV |
35 | static __be32 * |
36 | decode_fh(__be32 *p, struct svc_fh *fhp) | |
1da177e4 LT |
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 | /* FIXME: Look up export pointer here and verify | |
43 | * Sun Secure RPC if requested */ | |
44 | return p + (NFS_FHSIZE >> 2); | |
45 | } | |
46 | ||
a257cdd0 | 47 | /* Helper function for NFSv2 ACL code */ |
131a21c2 | 48 | __be32 *nfs2svc_decode_fh(__be32 *p, struct svc_fh *fhp) |
a257cdd0 AG |
49 | { |
50 | return decode_fh(p, fhp); | |
51 | } | |
52 | ||
3ee6f61c | 53 | static __be32 * |
131a21c2 | 54 | encode_fh(__be32 *p, struct svc_fh *fhp) |
1da177e4 LT |
55 | { |
56 | memcpy(p, &fhp->fh_handle.fh_base, NFS_FHSIZE); | |
57 | return p + (NFS_FHSIZE>> 2); | |
58 | } | |
59 | ||
60 | /* | |
61 | * Decode a file name and make sure that the path contains | |
62 | * no slashes or null bytes. | |
63 | */ | |
3ee6f61c | 64 | static __be32 * |
131a21c2 | 65 | decode_filename(__be32 *p, char **namp, int *lenp) |
1da177e4 LT |
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 | ||
3ee6f61c | 80 | static __be32 * |
131a21c2 | 81 | decode_pathname(__be32 *p, char **namp, int *lenp) |
1da177e4 LT |
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 | ||
3ee6f61c | 96 | static __be32 * |
131a21c2 | 97 | decode_sattr(__be32 *p, struct iattr *iap) |
1da177e4 LT |
98 | { |
99 | u32 tmp, tmp1; | |
100 | ||
101 | iap->ia_valid = 0; | |
102 | ||
103 | /* Sun client bug compatibility check: some sun clients seem to | |
104 | * put 0xffff in the mode field when they mean 0xffffffff. | |
105 | * Quoting the 4.4BSD nfs server code: Nah nah nah nah na nah. | |
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 | * Passing the invalid value useconds=1000000 for mtime | |
136 | * is a Sun convention for "set both mtime and atime to | |
137 | * current server time". It's needed to make permissions | |
138 | * checks for the "touch" program across v2 mounts to | |
139 | * Solaris and Irix boxes work correctly. See description of | |
140 | * sattr in section 6.1 of "NFS Illustrated" by | |
141 | * Brent Callaghan, Addison-Wesley, ISBN 0-201-32750-5 | |
142 | */ | |
143 | if (tmp1 == 1000000) | |
144 | iap->ia_valid &= ~(ATTR_ATIME_SET|ATTR_MTIME_SET); | |
145 | } | |
146 | return p; | |
147 | } | |
148 | ||
131a21c2 AV |
149 | static __be32 * |
150 | encode_fattr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp, | |
a334de28 | 151 | struct kstat *stat) |
1da177e4 | 152 | { |
1da177e4 | 153 | struct dentry *dentry = fhp->fh_dentry; |
1da177e4 LT |
154 | int type; |
155 | struct timespec time; | |
af6a4e28 | 156 | u32 f; |
1da177e4 | 157 | |
a334de28 | 158 | type = (stat->mode & S_IFMT); |
1da177e4 LT |
159 | |
160 | *p++ = htonl(nfs_ftypes[type >> 12]); | |
a334de28 DS |
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)); | |
1da177e4 | 165 | |
a334de28 | 166 | if (S_ISLNK(type) && stat->size > NFS_MAXPATHLEN) { |
1da177e4 LT |
167 | *p++ = htonl(NFS_MAXPATHLEN); |
168 | } else { | |
a334de28 | 169 | *p++ = htonl((u32) stat->size); |
1da177e4 | 170 | } |
a334de28 | 171 | *p++ = htonl((u32) stat->blksize); |
1da177e4 | 172 | if (S_ISCHR(type) || S_ISBLK(type)) |
a334de28 | 173 | *p++ = htonl(new_encode_dev(stat->rdev)); |
1da177e4 LT |
174 | else |
175 | *p++ = htonl(0xffffffff); | |
a334de28 | 176 | *p++ = htonl((u32) stat->blocks); |
af6a4e28 N |
177 | switch (fsid_source(fhp)) { |
178 | default: | |
179 | case FSIDSOURCE_DEV: | |
a334de28 | 180 | *p++ = htonl(new_encode_dev(stat->dev)); |
af6a4e28 N |
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 | } | |
a334de28 DS |
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); | |
1da177e4 LT |
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); | |
a334de28 DS |
199 | *p++ = htonl((u32) stat->ctime.tv_sec); |
200 | *p++ = htonl(stat->ctime.tv_nsec ? stat->ctime.tv_nsec / 1000 : 0); | |
1da177e4 LT |
201 | |
202 | return p; | |
203 | } | |
204 | ||
a257cdd0 | 205 | /* Helper function for NFSv2 ACL code */ |
131a21c2 | 206 | __be32 *nfs2svc_encode_fattr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp) |
a257cdd0 | 207 | { |
a334de28 DS |
208 | struct kstat stat; |
209 | vfs_getattr(fhp->fh_export->ex_mnt, fhp->fh_dentry, &stat); | |
210 | return encode_fattr(rqstp, p, fhp, &stat); | |
a257cdd0 | 211 | } |
1da177e4 LT |
212 | |
213 | /* | |
214 | * XDR decode functions | |
215 | */ | |
216 | int | |
131a21c2 | 217 | nfssvc_decode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy) |
1da177e4 LT |
218 | { |
219 | return xdr_argsize_check(rqstp, p); | |
220 | } | |
221 | ||
222 | int | |
131a21c2 | 223 | nfssvc_decode_fhandle(struct svc_rqst *rqstp, __be32 *p, struct nfsd_fhandle *args) |
1da177e4 LT |
224 | { |
225 | if (!(p = decode_fh(p, &args->fh))) | |
226 | return 0; | |
227 | return xdr_argsize_check(rqstp, p); | |
228 | } | |
229 | ||
230 | int | |
131a21c2 | 231 | nfssvc_decode_sattrargs(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
232 | struct nfsd_sattrargs *args) |
233 | { | |
234 | if (!(p = decode_fh(p, &args->fh)) | |
235 | || !(p = decode_sattr(p, &args->attrs))) | |
236 | return 0; | |
237 | ||
238 | return xdr_argsize_check(rqstp, p); | |
239 | } | |
240 | ||
241 | int | |
131a21c2 | 242 | nfssvc_decode_diropargs(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
243 | struct nfsd_diropargs *args) |
244 | { | |
245 | if (!(p = decode_fh(p, &args->fh)) | |
246 | || !(p = decode_filename(p, &args->name, &args->len))) | |
247 | return 0; | |
248 | ||
249 | return xdr_argsize_check(rqstp, p); | |
250 | } | |
251 | ||
252 | int | |
131a21c2 | 253 | nfssvc_decode_readargs(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
254 | struct nfsd_readargs *args) |
255 | { | |
256 | unsigned int len; | |
257 | int v,pn; | |
258 | if (!(p = decode_fh(p, &args->fh))) | |
259 | return 0; | |
260 | ||
261 | args->offset = ntohl(*p++); | |
262 | len = args->count = ntohl(*p++); | |
263 | p++; /* totalcount - unused */ | |
264 | ||
7adae489 GB |
265 | if (len > NFSSVC_MAXBLKSIZE_V2) |
266 | len = NFSSVC_MAXBLKSIZE_V2; | |
1da177e4 LT |
267 | |
268 | /* set up somewhere to store response. | |
269 | * We take pages, put them on reslist and include in iovec | |
270 | */ | |
271 | v=0; | |
272 | while (len > 0) { | |
44524359 | 273 | pn = rqstp->rq_resused++; |
3cc03b16 N |
274 | rqstp->rq_vec[v].iov_base = page_address(rqstp->rq_respages[pn]); |
275 | rqstp->rq_vec[v].iov_len = len < PAGE_SIZE?len:PAGE_SIZE; | |
276 | len -= rqstp->rq_vec[v].iov_len; | |
1da177e4 LT |
277 | v++; |
278 | } | |
279 | args->vlen = v; | |
280 | return xdr_argsize_check(rqstp, p); | |
281 | } | |
282 | ||
283 | int | |
131a21c2 | 284 | nfssvc_decode_writeargs(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
285 | struct nfsd_writeargs *args) |
286 | { | |
f34b9568 | 287 | unsigned int len, hdr, dlen; |
1da177e4 | 288 | int v; |
f34b9568 | 289 | |
1da177e4 LT |
290 | if (!(p = decode_fh(p, &args->fh))) |
291 | return 0; | |
292 | ||
293 | p++; /* beginoffset */ | |
294 | args->offset = ntohl(*p++); /* offset */ | |
295 | p++; /* totalcount */ | |
296 | len = args->len = ntohl(*p++); | |
f34b9568 PS |
297 | /* |
298 | * The protocol specifies a maximum of 8192 bytes. | |
299 | */ | |
7adae489 | 300 | if (len > NFSSVC_MAXBLKSIZE_V2) |
f34b9568 PS |
301 | return 0; |
302 | ||
303 | /* | |
304 | * Check to make sure that we got the right number of | |
305 | * bytes. | |
306 | * | |
307 | * If more than one page was used, then compute the length | |
308 | * of the data in the request as the total size of the | |
309 | * request minus the transport protocol headers minus the | |
310 | * RPC protocol headers minus the NFS protocol fields | |
311 | * already consumed. If the request fits into a single | |
312 | * page, then compete the length of the data as the size | |
313 | * of the NFS portion of the request minus the NFS | |
314 | * protocol fields already consumed. | |
315 | */ | |
316 | hdr = (void*)p - rqstp->rq_arg.head[0].iov_base; | |
317 | if (rqstp->rq_respages != rqstp->rq_pages + 1) { | |
318 | dlen = rqstp->rq_arg.len - | |
319 | (PAGE_SIZE - rqstp->rq_arg.head[0].iov_len) - hdr; | |
320 | } else { | |
321 | dlen = rqstp->rq_arg.head[0].iov_len - hdr; | |
322 | } | |
323 | /* | |
324 | * Round the length of the data which was specified up to | |
325 | * the next multiple of XDR units and then compare that | |
326 | * against the length which was actually received. | |
327 | */ | |
328 | if (dlen != ((len + 3) & ~0x3)) | |
329 | return 0; | |
330 | ||
331 | rqstp->rq_vec[0].iov_base = (void*)p; | |
332 | rqstp->rq_vec[0].iov_len = rqstp->rq_arg.head[0].iov_len - hdr; | |
1da177e4 | 333 | v = 0; |
3cc03b16 N |
334 | while (len > rqstp->rq_vec[v].iov_len) { |
335 | len -= rqstp->rq_vec[v].iov_len; | |
1da177e4 | 336 | v++; |
3cc03b16 N |
337 | rqstp->rq_vec[v].iov_base = page_address(rqstp->rq_pages[v]); |
338 | rqstp->rq_vec[v].iov_len = PAGE_SIZE; | |
1da177e4 | 339 | } |
3cc03b16 | 340 | rqstp->rq_vec[v].iov_len = len; |
f34b9568 PS |
341 | args->vlen = v + 1; |
342 | return 1; | |
1da177e4 LT |
343 | } |
344 | ||
345 | int | |
131a21c2 | 346 | nfssvc_decode_createargs(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
347 | struct nfsd_createargs *args) |
348 | { | |
349 | if (!(p = decode_fh(p, &args->fh)) | |
350 | || !(p = decode_filename(p, &args->name, &args->len)) | |
351 | || !(p = decode_sattr(p, &args->attrs))) | |
352 | return 0; | |
353 | ||
354 | return xdr_argsize_check(rqstp, p); | |
355 | } | |
356 | ||
357 | int | |
131a21c2 | 358 | nfssvc_decode_renameargs(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
359 | struct nfsd_renameargs *args) |
360 | { | |
361 | if (!(p = decode_fh(p, &args->ffh)) | |
362 | || !(p = decode_filename(p, &args->fname, &args->flen)) | |
363 | || !(p = decode_fh(p, &args->tfh)) | |
364 | || !(p = decode_filename(p, &args->tname, &args->tlen))) | |
365 | return 0; | |
366 | ||
367 | return xdr_argsize_check(rqstp, p); | |
368 | } | |
369 | ||
370 | int | |
131a21c2 | 371 | nfssvc_decode_readlinkargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd_readlinkargs *args) |
1da177e4 LT |
372 | { |
373 | if (!(p = decode_fh(p, &args->fh))) | |
374 | return 0; | |
44524359 | 375 | args->buffer = page_address(rqstp->rq_respages[rqstp->rq_resused++]); |
1da177e4 LT |
376 | |
377 | return xdr_argsize_check(rqstp, p); | |
378 | } | |
379 | ||
380 | int | |
131a21c2 | 381 | nfssvc_decode_linkargs(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
382 | struct nfsd_linkargs *args) |
383 | { | |
384 | if (!(p = decode_fh(p, &args->ffh)) | |
385 | || !(p = decode_fh(p, &args->tfh)) | |
386 | || !(p = decode_filename(p, &args->tname, &args->tlen))) | |
387 | return 0; | |
388 | ||
389 | return xdr_argsize_check(rqstp, p); | |
390 | } | |
391 | ||
392 | int | |
131a21c2 | 393 | nfssvc_decode_symlinkargs(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
394 | struct nfsd_symlinkargs *args) |
395 | { | |
396 | if (!(p = decode_fh(p, &args->ffh)) | |
397 | || !(p = decode_filename(p, &args->fname, &args->flen)) | |
398 | || !(p = decode_pathname(p, &args->tname, &args->tlen)) | |
399 | || !(p = decode_sattr(p, &args->attrs))) | |
400 | return 0; | |
401 | ||
402 | return xdr_argsize_check(rqstp, p); | |
403 | } | |
404 | ||
405 | int | |
131a21c2 | 406 | nfssvc_decode_readdirargs(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
407 | struct nfsd_readdirargs *args) |
408 | { | |
409 | if (!(p = decode_fh(p, &args->fh))) | |
410 | return 0; | |
411 | args->cookie = ntohl(*p++); | |
412 | args->count = ntohl(*p++); | |
413 | if (args->count > PAGE_SIZE) | |
414 | args->count = PAGE_SIZE; | |
415 | ||
44524359 | 416 | args->buffer = page_address(rqstp->rq_respages[rqstp->rq_resused++]); |
1da177e4 LT |
417 | |
418 | return xdr_argsize_check(rqstp, p); | |
419 | } | |
420 | ||
421 | /* | |
422 | * XDR encode functions | |
423 | */ | |
424 | int | |
131a21c2 | 425 | nfssvc_encode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy) |
1da177e4 LT |
426 | { |
427 | return xdr_ressize_check(rqstp, p); | |
428 | } | |
429 | ||
430 | int | |
131a21c2 | 431 | nfssvc_encode_attrstat(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
432 | struct nfsd_attrstat *resp) |
433 | { | |
a334de28 | 434 | p = encode_fattr(rqstp, p, &resp->fh, &resp->stat); |
1da177e4 LT |
435 | return xdr_ressize_check(rqstp, p); |
436 | } | |
437 | ||
438 | int | |
131a21c2 | 439 | nfssvc_encode_diropres(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
440 | struct nfsd_diropres *resp) |
441 | { | |
442 | p = encode_fh(p, &resp->fh); | |
a334de28 | 443 | p = encode_fattr(rqstp, p, &resp->fh, &resp->stat); |
1da177e4 LT |
444 | return xdr_ressize_check(rqstp, p); |
445 | } | |
446 | ||
447 | int | |
131a21c2 | 448 | nfssvc_encode_readlinkres(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
449 | struct nfsd_readlinkres *resp) |
450 | { | |
451 | *p++ = htonl(resp->len); | |
452 | xdr_ressize_check(rqstp, p); | |
453 | rqstp->rq_res.page_len = resp->len; | |
454 | if (resp->len & 3) { | |
455 | /* need to pad the tail */ | |
1da177e4 LT |
456 | rqstp->rq_res.tail[0].iov_base = p; |
457 | *p = 0; | |
458 | rqstp->rq_res.tail[0].iov_len = 4 - (resp->len&3); | |
459 | } | |
460 | return 1; | |
461 | } | |
462 | ||
463 | int | |
131a21c2 | 464 | nfssvc_encode_readres(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
465 | struct nfsd_readres *resp) |
466 | { | |
a334de28 | 467 | p = encode_fattr(rqstp, p, &resp->fh, &resp->stat); |
1da177e4 LT |
468 | *p++ = htonl(resp->count); |
469 | xdr_ressize_check(rqstp, p); | |
470 | ||
471 | /* now update rqstp->rq_res to reflect data aswell */ | |
472 | rqstp->rq_res.page_len = resp->count; | |
473 | if (resp->count & 3) { | |
474 | /* need to pad the tail */ | |
1da177e4 LT |
475 | rqstp->rq_res.tail[0].iov_base = p; |
476 | *p = 0; | |
477 | rqstp->rq_res.tail[0].iov_len = 4 - (resp->count&3); | |
478 | } | |
479 | return 1; | |
480 | } | |
481 | ||
482 | int | |
131a21c2 | 483 | nfssvc_encode_readdirres(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
484 | struct nfsd_readdirres *resp) |
485 | { | |
486 | xdr_ressize_check(rqstp, p); | |
487 | p = resp->buffer; | |
488 | *p++ = 0; /* no more entries */ | |
489 | *p++ = htonl((resp->common.err == nfserr_eof)); | |
490 | rqstp->rq_res.page_len = (((unsigned long)p-1) & ~PAGE_MASK)+1; | |
491 | ||
492 | return 1; | |
493 | } | |
494 | ||
495 | int | |
131a21c2 | 496 | nfssvc_encode_statfsres(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
497 | struct nfsd_statfsres *resp) |
498 | { | |
499 | struct kstatfs *stat = &resp->stats; | |
500 | ||
7adae489 | 501 | *p++ = htonl(NFSSVC_MAXBLKSIZE_V2); /* max transfer size */ |
1da177e4 LT |
502 | *p++ = htonl(stat->f_bsize); |
503 | *p++ = htonl(stat->f_blocks); | |
504 | *p++ = htonl(stat->f_bfree); | |
505 | *p++ = htonl(stat->f_bavail); | |
506 | return xdr_ressize_check(rqstp, p); | |
507 | } | |
508 | ||
509 | int | |
a0ad13ef N |
510 | nfssvc_encode_entry(void *ccdv, const char *name, |
511 | int namlen, loff_t offset, u64 ino, unsigned int d_type) | |
1da177e4 | 512 | { |
a0ad13ef | 513 | struct readdir_cd *ccd = ccdv; |
1da177e4 | 514 | struct nfsd_readdirres *cd = container_of(ccd, struct nfsd_readdirres, common); |
131a21c2 | 515 | __be32 *p = cd->buffer; |
1da177e4 LT |
516 | int buflen, slen; |
517 | ||
518 | /* | |
519 | dprintk("nfsd: entry(%.*s off %ld ino %ld)\n", | |
520 | namlen, name, offset, ino); | |
521 | */ | |
522 | ||
523 | if (offset > ~((u32) 0)) { | |
524 | cd->common.err = nfserr_fbig; | |
525 | return -EINVAL; | |
526 | } | |
527 | if (cd->offset) | |
528 | *cd->offset = htonl(offset); | |
529 | if (namlen > NFS2_MAXNAMLEN) | |
530 | namlen = NFS2_MAXNAMLEN;/* truncate filename */ | |
531 | ||
532 | slen = XDR_QUADLEN(namlen); | |
533 | if ((buflen = cd->buflen - slen - 4) < 0) { | |
534 | cd->common.err = nfserr_toosmall; | |
535 | return -EINVAL; | |
536 | } | |
537 | *p++ = xdr_one; /* mark entry present */ | |
538 | *p++ = htonl((u32) ino); /* file id */ | |
539 | p = xdr_encode_array(p, name, namlen);/* name length & name */ | |
540 | cd->offset = p; /* remember pointer */ | |
131a21c2 | 541 | *p++ = htonl(~0U); /* offset of next entry */ |
1da177e4 LT |
542 | |
543 | cd->buflen = buflen; | |
544 | cd->buffer = p; | |
545 | cd->common.err = nfs_ok; | |
546 | return 0; | |
547 | } | |
548 | ||
549 | /* | |
550 | * XDR release functions | |
551 | */ | |
552 | int | |
131a21c2 | 553 | nfssvc_release_fhandle(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
554 | struct nfsd_fhandle *resp) |
555 | { | |
556 | fh_put(&resp->fh); | |
557 | return 1; | |
558 | } |