blob: 65ec595e2226c0aa4e1f051abef5ef995f1d9fce [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 * XDR support for nfsd
3 *
4 * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
5 */
6
Boaz Harrosh9a74af22009-12-03 20:30:56 +02007#include "xdr.h"
J. Bruce Fields2e8138a2007-11-15 17:05:43 -05008#include "auth.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -07009
10#define NFSDDBG_FACILITY NFSDDBG_XDR
11
Linus Torvalds1da177e2005-04-16 15:20:36 -070012/*
13 * Mapping of S_IF* types to NFS file types
14 */
15static u32 nfs_ftypes[] = {
16 NFNON, NFCHR, NFCHR, NFBAD,
17 NFDIR, NFBAD, NFBLK, NFBAD,
18 NFREG, NFBAD, NFLNK, NFBAD,
19 NFSOCK, NFBAD, NFLNK, NFBAD,
20};
21
22
23/*
24 * XDR functions for basic NFS types
25 */
Al Viro131a21c2006-10-19 23:28:56 -070026static __be32 *
27decode_fh(__be32 *p, struct svc_fh *fhp)
Linus Torvalds1da177e2005-04-16 15:20:36 -070028{
29 fh_init(fhp, NFS_FHSIZE);
30 memcpy(&fhp->fh_handle.fh_base, p, NFS_FHSIZE);
31 fhp->fh_handle.fh_size = NFS_FHSIZE;
32
33 /* FIXME: Look up export pointer here and verify
34 * Sun Secure RPC if requested */
35 return p + (NFS_FHSIZE >> 2);
36}
37
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +000038/* Helper function for NFSv2 ACL code */
Al Viro131a21c2006-10-19 23:28:56 -070039__be32 *nfs2svc_decode_fh(__be32 *p, struct svc_fh *fhp)
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +000040{
41 return decode_fh(p, fhp);
42}
43
Adrian Bunk3ee6f612006-12-06 20:40:23 -080044static __be32 *
Al Viro131a21c2006-10-19 23:28:56 -070045encode_fh(__be32 *p, struct svc_fh *fhp)
Linus Torvalds1da177e2005-04-16 15:20:36 -070046{
47 memcpy(p, &fhp->fh_handle.fh_base, NFS_FHSIZE);
48 return p + (NFS_FHSIZE>> 2);
49}
50
51/*
52 * Decode a file name and make sure that the path contains
53 * no slashes or null bytes.
54 */
Adrian Bunk3ee6f612006-12-06 20:40:23 -080055static __be32 *
Chuck Leveree1a95b2007-11-01 16:56:58 -040056decode_filename(__be32 *p, char **namp, unsigned int *lenp)
Linus Torvalds1da177e2005-04-16 15:20:36 -070057{
58 char *name;
Chuck Leveree1a95b2007-11-01 16:56:58 -040059 unsigned int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -070060
61 if ((p = xdr_decode_string_inplace(p, namp, lenp, NFS_MAXNAMLEN)) != NULL) {
62 for (i = 0, name = *namp; i < *lenp; i++, name++) {
63 if (*name == '\0' || *name == '/')
64 return NULL;
65 }
66 }
67
68 return p;
69}
70
Adrian Bunk3ee6f612006-12-06 20:40:23 -080071static __be32 *
Chuck Lever9c7544d2007-11-01 16:57:14 -040072decode_pathname(__be32 *p, char **namp, unsigned int *lenp)
Linus Torvalds1da177e2005-04-16 15:20:36 -070073{
74 char *name;
Chuck Lever9c7544d2007-11-01 16:57:14 -040075 unsigned int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -070076
77 if ((p = xdr_decode_string_inplace(p, namp, lenp, NFS_MAXPATHLEN)) != NULL) {
78 for (i = 0, name = *namp; i < *lenp; i++, name++) {
79 if (*name == '\0')
80 return NULL;
81 }
82 }
83
84 return p;
85}
86
Adrian Bunk3ee6f612006-12-06 20:40:23 -080087static __be32 *
Al Viro131a21c2006-10-19 23:28:56 -070088decode_sattr(__be32 *p, struct iattr *iap)
Linus Torvalds1da177e2005-04-16 15:20:36 -070089{
90 u32 tmp, tmp1;
91
92 iap->ia_valid = 0;
93
94 /* Sun client bug compatibility check: some sun clients seem to
95 * put 0xffff in the mode field when they mean 0xffffffff.
96 * Quoting the 4.4BSD nfs server code: Nah nah nah nah na nah.
97 */
98 if ((tmp = ntohl(*p++)) != (u32)-1 && tmp != 0xffff) {
99 iap->ia_valid |= ATTR_MODE;
100 iap->ia_mode = tmp;
101 }
102 if ((tmp = ntohl(*p++)) != (u32)-1) {
103 iap->ia_valid |= ATTR_UID;
104 iap->ia_uid = tmp;
105 }
106 if ((tmp = ntohl(*p++)) != (u32)-1) {
107 iap->ia_valid |= ATTR_GID;
108 iap->ia_gid = tmp;
109 }
110 if ((tmp = ntohl(*p++)) != (u32)-1) {
111 iap->ia_valid |= ATTR_SIZE;
112 iap->ia_size = tmp;
113 }
114 tmp = ntohl(*p++); tmp1 = ntohl(*p++);
115 if (tmp != (u32)-1 && tmp1 != (u32)-1) {
116 iap->ia_valid |= ATTR_ATIME | ATTR_ATIME_SET;
117 iap->ia_atime.tv_sec = tmp;
118 iap->ia_atime.tv_nsec = tmp1 * 1000;
119 }
120 tmp = ntohl(*p++); tmp1 = ntohl(*p++);
121 if (tmp != (u32)-1 && tmp1 != (u32)-1) {
122 iap->ia_valid |= ATTR_MTIME | ATTR_MTIME_SET;
123 iap->ia_mtime.tv_sec = tmp;
124 iap->ia_mtime.tv_nsec = tmp1 * 1000;
125 /*
126 * Passing the invalid value useconds=1000000 for mtime
127 * is a Sun convention for "set both mtime and atime to
128 * current server time". It's needed to make permissions
129 * checks for the "touch" program across v2 mounts to
130 * Solaris and Irix boxes work correctly. See description of
131 * sattr in section 6.1 of "NFS Illustrated" by
132 * Brent Callaghan, Addison-Wesley, ISBN 0-201-32750-5
133 */
134 if (tmp1 == 1000000)
135 iap->ia_valid &= ~(ATTR_ATIME_SET|ATTR_MTIME_SET);
136 }
137 return p;
138}
139
Al Viro131a21c2006-10-19 23:28:56 -0700140static __be32 *
141encode_fattr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp,
David Shawa334de22006-01-06 00:19:58 -0800142 struct kstat *stat)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144 struct dentry *dentry = fhp->fh_dentry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145 int type;
146 struct timespec time;
NeilBrownaf6a4e22007-02-14 00:33:12 -0800147 u32 f;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148
David Shawa334de22006-01-06 00:19:58 -0800149 type = (stat->mode & S_IFMT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150
151 *p++ = htonl(nfs_ftypes[type >> 12]);
David Shawa334de22006-01-06 00:19:58 -0800152 *p++ = htonl((u32) stat->mode);
153 *p++ = htonl((u32) stat->nlink);
154 *p++ = htonl((u32) nfsd_ruid(rqstp, stat->uid));
155 *p++ = htonl((u32) nfsd_rgid(rqstp, stat->gid));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156
David Shawa334de22006-01-06 00:19:58 -0800157 if (S_ISLNK(type) && stat->size > NFS_MAXPATHLEN) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 *p++ = htonl(NFS_MAXPATHLEN);
159 } else {
David Shawa334de22006-01-06 00:19:58 -0800160 *p++ = htonl((u32) stat->size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161 }
David Shawa334de22006-01-06 00:19:58 -0800162 *p++ = htonl((u32) stat->blksize);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163 if (S_ISCHR(type) || S_ISBLK(type))
David Shawa334de22006-01-06 00:19:58 -0800164 *p++ = htonl(new_encode_dev(stat->rdev));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165 else
166 *p++ = htonl(0xffffffff);
David Shawa334de22006-01-06 00:19:58 -0800167 *p++ = htonl((u32) stat->blocks);
NeilBrownaf6a4e22007-02-14 00:33:12 -0800168 switch (fsid_source(fhp)) {
169 default:
170 case FSIDSOURCE_DEV:
David Shawa334de22006-01-06 00:19:58 -0800171 *p++ = htonl(new_encode_dev(stat->dev));
NeilBrownaf6a4e22007-02-14 00:33:12 -0800172 break;
173 case FSIDSOURCE_FSID:
174 *p++ = htonl((u32) fhp->fh_export->ex_fsid);
175 break;
176 case FSIDSOURCE_UUID:
177 f = ((u32*)fhp->fh_export->ex_uuid)[0];
178 f ^= ((u32*)fhp->fh_export->ex_uuid)[1];
179 f ^= ((u32*)fhp->fh_export->ex_uuid)[2];
180 f ^= ((u32*)fhp->fh_export->ex_uuid)[3];
181 *p++ = htonl(f);
182 break;
183 }
David Shawa334de22006-01-06 00:19:58 -0800184 *p++ = htonl((u32) stat->ino);
185 *p++ = htonl((u32) stat->atime.tv_sec);
186 *p++ = htonl(stat->atime.tv_nsec ? stat->atime.tv_nsec / 1000 : 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187 lease_get_mtime(dentry->d_inode, &time);
188 *p++ = htonl((u32) time.tv_sec);
189 *p++ = htonl(time.tv_nsec ? time.tv_nsec / 1000 : 0);
David Shawa334de22006-01-06 00:19:58 -0800190 *p++ = htonl((u32) stat->ctime.tv_sec);
191 *p++ = htonl(stat->ctime.tv_nsec ? stat->ctime.tv_nsec / 1000 : 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192
193 return p;
194}
195
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000196/* Helper function for NFSv2 ACL code */
Al Viro131a21c2006-10-19 23:28:56 -0700197__be32 *nfs2svc_encode_fattr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp)
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000198{
David Shawa334de22006-01-06 00:19:58 -0800199 struct kstat stat;
Jan Blunck54775492008-02-14 19:38:39 -0800200 vfs_getattr(fhp->fh_export->ex_path.mnt, fhp->fh_dentry, &stat);
David Shawa334de22006-01-06 00:19:58 -0800201 return encode_fattr(rqstp, p, fhp, &stat);
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000202}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203
204/*
205 * XDR decode functions
206 */
207int
Al Viro131a21c2006-10-19 23:28:56 -0700208nfssvc_decode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209{
210 return xdr_argsize_check(rqstp, p);
211}
212
213int
Al Viro131a21c2006-10-19 23:28:56 -0700214nfssvc_decode_fhandle(struct svc_rqst *rqstp, __be32 *p, struct nfsd_fhandle *args)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215{
216 if (!(p = decode_fh(p, &args->fh)))
217 return 0;
218 return xdr_argsize_check(rqstp, p);
219}
220
221int
Al Viro131a21c2006-10-19 23:28:56 -0700222nfssvc_decode_sattrargs(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223 struct nfsd_sattrargs *args)
224{
NeilBrown072f62e2007-05-09 02:34:57 -0700225 p = decode_fh(p, &args->fh);
226 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227 return 0;
NeilBrown072f62e2007-05-09 02:34:57 -0700228 p = decode_sattr(p, &args->attrs);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229
230 return xdr_argsize_check(rqstp, p);
231}
232
233int
Al Viro131a21c2006-10-19 23:28:56 -0700234nfssvc_decode_diropargs(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235 struct nfsd_diropargs *args)
236{
237 if (!(p = decode_fh(p, &args->fh))
238 || !(p = decode_filename(p, &args->name, &args->len)))
239 return 0;
240
241 return xdr_argsize_check(rqstp, p);
242}
243
244int
Al Viro131a21c2006-10-19 23:28:56 -0700245nfssvc_decode_readargs(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246 struct nfsd_readargs *args)
247{
248 unsigned int len;
249 int v,pn;
250 if (!(p = decode_fh(p, &args->fh)))
251 return 0;
252
253 args->offset = ntohl(*p++);
254 len = args->count = ntohl(*p++);
255 p++; /* totalcount - unused */
256
Greg Banks7adae482006-10-04 02:15:47 -0700257 if (len > NFSSVC_MAXBLKSIZE_V2)
258 len = NFSSVC_MAXBLKSIZE_V2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259
260 /* set up somewhere to store response.
261 * We take pages, put them on reslist and include in iovec
262 */
263 v=0;
264 while (len > 0) {
NeilBrown44524352006-10-04 02:15:46 -0700265 pn = rqstp->rq_resused++;
NeilBrown3cc03b12006-10-04 02:15:47 -0700266 rqstp->rq_vec[v].iov_base = page_address(rqstp->rq_respages[pn]);
267 rqstp->rq_vec[v].iov_len = len < PAGE_SIZE?len:PAGE_SIZE;
268 len -= rqstp->rq_vec[v].iov_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269 v++;
270 }
271 args->vlen = v;
272 return xdr_argsize_check(rqstp, p);
273}
274
275int
Al Viro131a21c2006-10-19 23:28:56 -0700276nfssvc_decode_writeargs(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277 struct nfsd_writeargs *args)
278{
Peter Staubachf34b9562007-05-09 02:34:48 -0700279 unsigned int len, hdr, dlen;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280 int v;
Peter Staubachf34b9562007-05-09 02:34:48 -0700281
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282 if (!(p = decode_fh(p, &args->fh)))
283 return 0;
284
285 p++; /* beginoffset */
286 args->offset = ntohl(*p++); /* offset */
287 p++; /* totalcount */
288 len = args->len = ntohl(*p++);
Peter Staubachf34b9562007-05-09 02:34:48 -0700289 /*
290 * The protocol specifies a maximum of 8192 bytes.
291 */
Greg Banks7adae482006-10-04 02:15:47 -0700292 if (len > NFSSVC_MAXBLKSIZE_V2)
Peter Staubachf34b9562007-05-09 02:34:48 -0700293 return 0;
294
295 /*
296 * Check to make sure that we got the right number of
297 * bytes.
Peter Staubachf34b9562007-05-09 02:34:48 -0700298 */
299 hdr = (void*)p - rqstp->rq_arg.head[0].iov_base;
NeilBrown072f62e2007-05-09 02:34:57 -0700300 dlen = rqstp->rq_arg.head[0].iov_len + rqstp->rq_arg.page_len
301 - hdr;
302
Peter Staubachf34b9562007-05-09 02:34:48 -0700303 /*
304 * Round the length of the data which was specified up to
305 * the next multiple of XDR units and then compare that
306 * against the length which was actually received.
NeilBrownba67a392008-01-11 17:06:52 -0500307 * Note that when RPCSEC/GSS (for example) is used, the
308 * data buffer can be padded so dlen might be larger
309 * than required. It must never be smaller.
Peter Staubachf34b9562007-05-09 02:34:48 -0700310 */
NeilBrownba67a392008-01-11 17:06:52 -0500311 if (dlen < XDR_QUADLEN(len)*4)
Peter Staubachf34b9562007-05-09 02:34:48 -0700312 return 0;
313
314 rqstp->rq_vec[0].iov_base = (void*)p;
315 rqstp->rq_vec[0].iov_len = rqstp->rq_arg.head[0].iov_len - hdr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316 v = 0;
NeilBrown3cc03b12006-10-04 02:15:47 -0700317 while (len > rqstp->rq_vec[v].iov_len) {
318 len -= rqstp->rq_vec[v].iov_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319 v++;
NeilBrown3cc03b12006-10-04 02:15:47 -0700320 rqstp->rq_vec[v].iov_base = page_address(rqstp->rq_pages[v]);
321 rqstp->rq_vec[v].iov_len = PAGE_SIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322 }
NeilBrown3cc03b12006-10-04 02:15:47 -0700323 rqstp->rq_vec[v].iov_len = len;
Peter Staubachf34b9562007-05-09 02:34:48 -0700324 args->vlen = v + 1;
325 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326}
327
328int
Al Viro131a21c2006-10-19 23:28:56 -0700329nfssvc_decode_createargs(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330 struct nfsd_createargs *args)
331{
NeilBrown072f62e2007-05-09 02:34:57 -0700332 if ( !(p = decode_fh(p, &args->fh))
333 || !(p = decode_filename(p, &args->name, &args->len)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334 return 0;
NeilBrown072f62e2007-05-09 02:34:57 -0700335 p = decode_sattr(p, &args->attrs);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336
337 return xdr_argsize_check(rqstp, p);
338}
339
340int
Al Viro131a21c2006-10-19 23:28:56 -0700341nfssvc_decode_renameargs(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 struct nfsd_renameargs *args)
343{
344 if (!(p = decode_fh(p, &args->ffh))
345 || !(p = decode_filename(p, &args->fname, &args->flen))
346 || !(p = decode_fh(p, &args->tfh))
347 || !(p = decode_filename(p, &args->tname, &args->tlen)))
348 return 0;
349
350 return xdr_argsize_check(rqstp, p);
351}
352
353int
Al Viro131a21c2006-10-19 23:28:56 -0700354nfssvc_decode_readlinkargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd_readlinkargs *args)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355{
356 if (!(p = decode_fh(p, &args->fh)))
357 return 0;
NeilBrown44524352006-10-04 02:15:46 -0700358 args->buffer = page_address(rqstp->rq_respages[rqstp->rq_resused++]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359
360 return xdr_argsize_check(rqstp, p);
361}
362
363int
Al Viro131a21c2006-10-19 23:28:56 -0700364nfssvc_decode_linkargs(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365 struct nfsd_linkargs *args)
366{
367 if (!(p = decode_fh(p, &args->ffh))
368 || !(p = decode_fh(p, &args->tfh))
369 || !(p = decode_filename(p, &args->tname, &args->tlen)))
370 return 0;
371
372 return xdr_argsize_check(rqstp, p);
373}
374
375int
Al Viro131a21c2006-10-19 23:28:56 -0700376nfssvc_decode_symlinkargs(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377 struct nfsd_symlinkargs *args)
378{
NeilBrown072f62e2007-05-09 02:34:57 -0700379 if ( !(p = decode_fh(p, &args->ffh))
380 || !(p = decode_filename(p, &args->fname, &args->flen))
381 || !(p = decode_pathname(p, &args->tname, &args->tlen)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382 return 0;
NeilBrown072f62e2007-05-09 02:34:57 -0700383 p = decode_sattr(p, &args->attrs);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384
385 return xdr_argsize_check(rqstp, p);
386}
387
388int
Al Viro131a21c2006-10-19 23:28:56 -0700389nfssvc_decode_readdirargs(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390 struct nfsd_readdirargs *args)
391{
392 if (!(p = decode_fh(p, &args->fh)))
393 return 0;
394 args->cookie = ntohl(*p++);
395 args->count = ntohl(*p++);
396 if (args->count > PAGE_SIZE)
397 args->count = PAGE_SIZE;
398
NeilBrown44524352006-10-04 02:15:46 -0700399 args->buffer = page_address(rqstp->rq_respages[rqstp->rq_resused++]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400
401 return xdr_argsize_check(rqstp, p);
402}
403
404/*
405 * XDR encode functions
406 */
407int
Al Viro131a21c2006-10-19 23:28:56 -0700408nfssvc_encode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409{
410 return xdr_ressize_check(rqstp, p);
411}
412
413int
Al Viro131a21c2006-10-19 23:28:56 -0700414nfssvc_encode_attrstat(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415 struct nfsd_attrstat *resp)
416{
David Shawa334de22006-01-06 00:19:58 -0800417 p = encode_fattr(rqstp, p, &resp->fh, &resp->stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418 return xdr_ressize_check(rqstp, p);
419}
420
421int
Al Viro131a21c2006-10-19 23:28:56 -0700422nfssvc_encode_diropres(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423 struct nfsd_diropres *resp)
424{
425 p = encode_fh(p, &resp->fh);
David Shawa334de22006-01-06 00:19:58 -0800426 p = encode_fattr(rqstp, p, &resp->fh, &resp->stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427 return xdr_ressize_check(rqstp, p);
428}
429
430int
Al Viro131a21c2006-10-19 23:28:56 -0700431nfssvc_encode_readlinkres(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432 struct nfsd_readlinkres *resp)
433{
434 *p++ = htonl(resp->len);
435 xdr_ressize_check(rqstp, p);
436 rqstp->rq_res.page_len = resp->len;
437 if (resp->len & 3) {
438 /* need to pad the tail */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439 rqstp->rq_res.tail[0].iov_base = p;
440 *p = 0;
441 rqstp->rq_res.tail[0].iov_len = 4 - (resp->len&3);
442 }
443 return 1;
444}
445
446int
Al Viro131a21c2006-10-19 23:28:56 -0700447nfssvc_encode_readres(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448 struct nfsd_readres *resp)
449{
David Shawa334de22006-01-06 00:19:58 -0800450 p = encode_fattr(rqstp, p, &resp->fh, &resp->stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451 *p++ = htonl(resp->count);
452 xdr_ressize_check(rqstp, p);
453
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300454 /* now update rqstp->rq_res to reflect data as well */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455 rqstp->rq_res.page_len = resp->count;
456 if (resp->count & 3) {
457 /* need to pad the tail */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458 rqstp->rq_res.tail[0].iov_base = p;
459 *p = 0;
460 rqstp->rq_res.tail[0].iov_len = 4 - (resp->count&3);
461 }
462 return 1;
463}
464
465int
Al Viro131a21c2006-10-19 23:28:56 -0700466nfssvc_encode_readdirres(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467 struct nfsd_readdirres *resp)
468{
469 xdr_ressize_check(rqstp, p);
470 p = resp->buffer;
471 *p++ = 0; /* no more entries */
472 *p++ = htonl((resp->common.err == nfserr_eof));
473 rqstp->rq_res.page_len = (((unsigned long)p-1) & ~PAGE_MASK)+1;
474
475 return 1;
476}
477
478int
Al Viro131a21c2006-10-19 23:28:56 -0700479nfssvc_encode_statfsres(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480 struct nfsd_statfsres *resp)
481{
482 struct kstatfs *stat = &resp->stats;
483
Greg Banks7adae482006-10-04 02:15:47 -0700484 *p++ = htonl(NFSSVC_MAXBLKSIZE_V2); /* max transfer size */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485 *p++ = htonl(stat->f_bsize);
486 *p++ = htonl(stat->f_blocks);
487 *p++ = htonl(stat->f_bfree);
488 *p++ = htonl(stat->f_bavail);
489 return xdr_ressize_check(rqstp, p);
490}
491
492int
NeilBrowna0ad13e2007-01-26 00:57:10 -0800493nfssvc_encode_entry(void *ccdv, const char *name,
494 int namlen, loff_t offset, u64 ino, unsigned int d_type)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495{
NeilBrowna0ad13e2007-01-26 00:57:10 -0800496 struct readdir_cd *ccd = ccdv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497 struct nfsd_readdirres *cd = container_of(ccd, struct nfsd_readdirres, common);
Al Viro131a21c2006-10-19 23:28:56 -0700498 __be32 *p = cd->buffer;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499 int buflen, slen;
500
501 /*
502 dprintk("nfsd: entry(%.*s off %ld ino %ld)\n",
503 namlen, name, offset, ino);
504 */
505
506 if (offset > ~((u32) 0)) {
507 cd->common.err = nfserr_fbig;
508 return -EINVAL;
509 }
510 if (cd->offset)
511 *cd->offset = htonl(offset);
512 if (namlen > NFS2_MAXNAMLEN)
513 namlen = NFS2_MAXNAMLEN;/* truncate filename */
514
515 slen = XDR_QUADLEN(namlen);
516 if ((buflen = cd->buflen - slen - 4) < 0) {
517 cd->common.err = nfserr_toosmall;
518 return -EINVAL;
519 }
Peter Staubach40ee5dc2007-08-16 12:10:07 -0400520 if (ino > ~((u32) 0)) {
521 cd->common.err = nfserr_fbig;
522 return -EINVAL;
523 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524 *p++ = xdr_one; /* mark entry present */
525 *p++ = htonl((u32) ino); /* file id */
526 p = xdr_encode_array(p, name, namlen);/* name length & name */
527 cd->offset = p; /* remember pointer */
Al Viro131a21c2006-10-19 23:28:56 -0700528 *p++ = htonl(~0U); /* offset of next entry */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529
530 cd->buflen = buflen;
531 cd->buffer = p;
532 cd->common.err = nfs_ok;
533 return 0;
534}
535
536/*
537 * XDR release functions
538 */
539int
Al Viro131a21c2006-10-19 23:28:56 -0700540nfssvc_release_fhandle(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700541 struct nfsd_fhandle *resp)
542{
543 fh_put(&resp->fh);
544 return 1;
545}