blob: cb3e7fadb772127975898e14a43c6bd3dd4c4d92 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Uwe Zeisbergerf30c2262006-10-03 23:01:26 +02002 * linux/fs/nfsd/nfsxdr.c
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 *
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070021/*
22 * Mapping of S_IF* types to NFS file types
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 * XDR functions for basic NFS types
34 */
Al Viro131a21c2006-10-19 23:28:56 -070035static __be32 *
36decode_fh(__be32 *p, struct svc_fh *fhp)
Linus Torvalds1da177e2005-04-16 15:20:36 -070037{
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
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +000047/* Helper function for NFSv2 ACL code */
Al Viro131a21c2006-10-19 23:28:56 -070048__be32 *nfs2svc_decode_fh(__be32 *p, struct svc_fh *fhp)
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +000049{
50 return decode_fh(p, fhp);
51}
52
Adrian Bunk3ee6f612006-12-06 20:40:23 -080053static __be32 *
Al Viro131a21c2006-10-19 23:28:56 -070054encode_fh(__be32 *p, struct svc_fh *fhp)
Linus Torvalds1da177e2005-04-16 15:20:36 -070055{
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 */
Adrian Bunk3ee6f612006-12-06 20:40:23 -080064static __be32 *
Al Viro131a21c2006-10-19 23:28:56 -070065decode_filename(__be32 *p, char **namp, int *lenp)
Linus Torvalds1da177e2005-04-16 15:20:36 -070066{
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
Adrian Bunk3ee6f612006-12-06 20:40:23 -080080static __be32 *
Al Viro131a21c2006-10-19 23:28:56 -070081decode_pathname(__be32 *p, char **namp, int *lenp)
Linus Torvalds1da177e2005-04-16 15:20:36 -070082{
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
Adrian Bunk3ee6f612006-12-06 20:40:23 -080096static __be32 *
Al Viro131a21c2006-10-19 23:28:56 -070097decode_sattr(__be32 *p, struct iattr *iap)
Linus Torvalds1da177e2005-04-16 15:20:36 -070098{
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
Al Viro131a21c2006-10-19 23:28:56 -0700149static __be32 *
150encode_fattr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp,
David Shawa334de22006-01-06 00:19:58 -0800151 struct kstat *stat)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153 struct dentry *dentry = fhp->fh_dentry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154 int type;
155 struct timespec time;
NeilBrownaf6a4e22007-02-14 00:33:12 -0800156 u32 f;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157
David Shawa334de22006-01-06 00:19:58 -0800158 type = (stat->mode & S_IFMT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159
160 *p++ = htonl(nfs_ftypes[type >> 12]);
David Shawa334de22006-01-06 00:19:58 -0800161 *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));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165
David Shawa334de22006-01-06 00:19:58 -0800166 if (S_ISLNK(type) && stat->size > NFS_MAXPATHLEN) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167 *p++ = htonl(NFS_MAXPATHLEN);
168 } else {
David Shawa334de22006-01-06 00:19:58 -0800169 *p++ = htonl((u32) stat->size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 }
David Shawa334de22006-01-06 00:19:58 -0800171 *p++ = htonl((u32) stat->blksize);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172 if (S_ISCHR(type) || S_ISBLK(type))
David Shawa334de22006-01-06 00:19:58 -0800173 *p++ = htonl(new_encode_dev(stat->rdev));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174 else
175 *p++ = htonl(0xffffffff);
David Shawa334de22006-01-06 00:19:58 -0800176 *p++ = htonl((u32) stat->blocks);
NeilBrownaf6a4e22007-02-14 00:33:12 -0800177 switch (fsid_source(fhp)) {
178 default:
179 case FSIDSOURCE_DEV:
David Shawa334de22006-01-06 00:19:58 -0800180 *p++ = htonl(new_encode_dev(stat->dev));
NeilBrownaf6a4e22007-02-14 00:33:12 -0800181 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 }
David Shawa334de22006-01-06 00:19:58 -0800193 *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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196 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);
David Shawa334de22006-01-06 00:19:58 -0800199 *p++ = htonl((u32) stat->ctime.tv_sec);
200 *p++ = htonl(stat->ctime.tv_nsec ? stat->ctime.tv_nsec / 1000 : 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201
202 return p;
203}
204
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000205/* Helper function for NFSv2 ACL code */
Al Viro131a21c2006-10-19 23:28:56 -0700206__be32 *nfs2svc_encode_fattr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp)
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000207{
David Shawa334de22006-01-06 00:19:58 -0800208 struct kstat stat;
209 vfs_getattr(fhp->fh_export->ex_mnt, fhp->fh_dentry, &stat);
210 return encode_fattr(rqstp, p, fhp, &stat);
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000211}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212
213/*
214 * XDR decode functions
215 */
216int
Al Viro131a21c2006-10-19 23:28:56 -0700217nfssvc_decode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218{
219 return xdr_argsize_check(rqstp, p);
220}
221
222int
Al Viro131a21c2006-10-19 23:28:56 -0700223nfssvc_decode_fhandle(struct svc_rqst *rqstp, __be32 *p, struct nfsd_fhandle *args)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224{
225 if (!(p = decode_fh(p, &args->fh)))
226 return 0;
227 return xdr_argsize_check(rqstp, p);
228}
229
230int
Al Viro131a21c2006-10-19 23:28:56 -0700231nfssvc_decode_sattrargs(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232 struct nfsd_sattrargs *args)
233{
NeilBrown072f62e2007-05-09 02:34:57 -0700234 p = decode_fh(p, &args->fh);
235 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236 return 0;
NeilBrown072f62e2007-05-09 02:34:57 -0700237 p = decode_sattr(p, &args->attrs);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238
239 return xdr_argsize_check(rqstp, p);
240}
241
242int
Al Viro131a21c2006-10-19 23:28:56 -0700243nfssvc_decode_diropargs(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244 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
Al Viro131a21c2006-10-19 23:28:56 -0700254nfssvc_decode_readargs(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 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++; /* totalcount - unused */
265
Greg Banks7adae482006-10-04 02:15:47 -0700266 if (len > NFSSVC_MAXBLKSIZE_V2)
267 len = NFSSVC_MAXBLKSIZE_V2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268
269 /* set up somewhere to store response.
270 * We take pages, put them on reslist and include in iovec
271 */
272 v=0;
273 while (len > 0) {
NeilBrown44524352006-10-04 02:15:46 -0700274 pn = rqstp->rq_resused++;
NeilBrown3cc03b12006-10-04 02:15:47 -0700275 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278 v++;
279 }
280 args->vlen = v;
281 return xdr_argsize_check(rqstp, p);
282}
283
284int
Al Viro131a21c2006-10-19 23:28:56 -0700285nfssvc_decode_writeargs(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286 struct nfsd_writeargs *args)
287{
Peter Staubachf34b9562007-05-09 02:34:48 -0700288 unsigned int len, hdr, dlen;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 int v;
Peter Staubachf34b9562007-05-09 02:34:48 -0700290
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291 if (!(p = decode_fh(p, &args->fh)))
292 return 0;
293
294 p++; /* beginoffset */
295 args->offset = ntohl(*p++); /* offset */
296 p++; /* totalcount */
297 len = args->len = ntohl(*p++);
Peter Staubachf34b9562007-05-09 02:34:48 -0700298 /*
299 * The protocol specifies a maximum of 8192 bytes.
300 */
Greg Banks7adae482006-10-04 02:15:47 -0700301 if (len > NFSSVC_MAXBLKSIZE_V2)
Peter Staubachf34b9562007-05-09 02:34:48 -0700302 return 0;
303
304 /*
305 * Check to make sure that we got the right number of
306 * bytes.
Peter Staubachf34b9562007-05-09 02:34:48 -0700307 */
308 hdr = (void*)p - rqstp->rq_arg.head[0].iov_base;
NeilBrown072f62e2007-05-09 02:34:57 -0700309 dlen = rqstp->rq_arg.head[0].iov_len + rqstp->rq_arg.page_len
310 - hdr;
311
Peter Staubachf34b9562007-05-09 02:34:48 -0700312 /*
313 * Round the length of the data which was specified up to
314 * the next multiple of XDR units and then compare that
315 * against the length which was actually received.
316 */
NeilBrown072f62e2007-05-09 02:34:57 -0700317 if (dlen != XDR_QUADLEN(len)*4)
Peter Staubachf34b9562007-05-09 02:34:48 -0700318 return 0;
319
320 rqstp->rq_vec[0].iov_base = (void*)p;
321 rqstp->rq_vec[0].iov_len = rqstp->rq_arg.head[0].iov_len - hdr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322 v = 0;
NeilBrown3cc03b12006-10-04 02:15:47 -0700323 while (len > rqstp->rq_vec[v].iov_len) {
324 len -= rqstp->rq_vec[v].iov_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325 v++;
NeilBrown3cc03b12006-10-04 02:15:47 -0700326 rqstp->rq_vec[v].iov_base = page_address(rqstp->rq_pages[v]);
327 rqstp->rq_vec[v].iov_len = PAGE_SIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328 }
NeilBrown3cc03b12006-10-04 02:15:47 -0700329 rqstp->rq_vec[v].iov_len = len;
Peter Staubachf34b9562007-05-09 02:34:48 -0700330 args->vlen = v + 1;
331 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332}
333
334int
Al Viro131a21c2006-10-19 23:28:56 -0700335nfssvc_decode_createargs(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336 struct nfsd_createargs *args)
337{
NeilBrown072f62e2007-05-09 02:34:57 -0700338 if ( !(p = decode_fh(p, &args->fh))
339 || !(p = decode_filename(p, &args->name, &args->len)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340 return 0;
NeilBrown072f62e2007-05-09 02:34:57 -0700341 p = decode_sattr(p, &args->attrs);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342
343 return xdr_argsize_check(rqstp, p);
344}
345
346int
Al Viro131a21c2006-10-19 23:28:56 -0700347nfssvc_decode_renameargs(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348 struct nfsd_renameargs *args)
349{
350 if (!(p = decode_fh(p, &args->ffh))
351 || !(p = decode_filename(p, &args->fname, &args->flen))
352 || !(p = decode_fh(p, &args->tfh))
353 || !(p = decode_filename(p, &args->tname, &args->tlen)))
354 return 0;
355
356 return xdr_argsize_check(rqstp, p);
357}
358
359int
Al Viro131a21c2006-10-19 23:28:56 -0700360nfssvc_decode_readlinkargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd_readlinkargs *args)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361{
362 if (!(p = decode_fh(p, &args->fh)))
363 return 0;
NeilBrown44524352006-10-04 02:15:46 -0700364 args->buffer = page_address(rqstp->rq_respages[rqstp->rq_resused++]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365
366 return xdr_argsize_check(rqstp, p);
367}
368
369int
Al Viro131a21c2006-10-19 23:28:56 -0700370nfssvc_decode_linkargs(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371 struct nfsd_linkargs *args)
372{
373 if (!(p = decode_fh(p, &args->ffh))
374 || !(p = decode_fh(p, &args->tfh))
375 || !(p = decode_filename(p, &args->tname, &args->tlen)))
376 return 0;
377
378 return xdr_argsize_check(rqstp, p);
379}
380
381int
Al Viro131a21c2006-10-19 23:28:56 -0700382nfssvc_decode_symlinkargs(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383 struct nfsd_symlinkargs *args)
384{
NeilBrown072f62e2007-05-09 02:34:57 -0700385 if ( !(p = decode_fh(p, &args->ffh))
386 || !(p = decode_filename(p, &args->fname, &args->flen))
387 || !(p = decode_pathname(p, &args->tname, &args->tlen)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388 return 0;
NeilBrown072f62e2007-05-09 02:34:57 -0700389 p = decode_sattr(p, &args->attrs);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390
391 return xdr_argsize_check(rqstp, p);
392}
393
394int
Al Viro131a21c2006-10-19 23:28:56 -0700395nfssvc_decode_readdirargs(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396 struct nfsd_readdirargs *args)
397{
398 if (!(p = decode_fh(p, &args->fh)))
399 return 0;
400 args->cookie = ntohl(*p++);
401 args->count = ntohl(*p++);
402 if (args->count > PAGE_SIZE)
403 args->count = PAGE_SIZE;
404
NeilBrown44524352006-10-04 02:15:46 -0700405 args->buffer = page_address(rqstp->rq_respages[rqstp->rq_resused++]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406
407 return xdr_argsize_check(rqstp, p);
408}
409
410/*
411 * XDR encode functions
412 */
413int
Al Viro131a21c2006-10-19 23:28:56 -0700414nfssvc_encode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415{
416 return xdr_ressize_check(rqstp, p);
417}
418
419int
Al Viro131a21c2006-10-19 23:28:56 -0700420nfssvc_encode_attrstat(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421 struct nfsd_attrstat *resp)
422{
David Shawa334de22006-01-06 00:19:58 -0800423 p = encode_fattr(rqstp, p, &resp->fh, &resp->stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424 return xdr_ressize_check(rqstp, p);
425}
426
427int
Al Viro131a21c2006-10-19 23:28:56 -0700428nfssvc_encode_diropres(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429 struct nfsd_diropres *resp)
430{
431 p = encode_fh(p, &resp->fh);
David Shawa334de22006-01-06 00:19:58 -0800432 p = encode_fattr(rqstp, p, &resp->fh, &resp->stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433 return xdr_ressize_check(rqstp, p);
434}
435
436int
Al Viro131a21c2006-10-19 23:28:56 -0700437nfssvc_encode_readlinkres(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438 struct nfsd_readlinkres *resp)
439{
440 *p++ = htonl(resp->len);
441 xdr_ressize_check(rqstp, p);
442 rqstp->rq_res.page_len = resp->len;
443 if (resp->len & 3) {
444 /* need to pad the tail */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445 rqstp->rq_res.tail[0].iov_base = p;
446 *p = 0;
447 rqstp->rq_res.tail[0].iov_len = 4 - (resp->len&3);
448 }
449 return 1;
450}
451
452int
Al Viro131a21c2006-10-19 23:28:56 -0700453nfssvc_encode_readres(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 struct nfsd_readres *resp)
455{
David Shawa334de22006-01-06 00:19:58 -0800456 p = encode_fattr(rqstp, p, &resp->fh, &resp->stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457 *p++ = htonl(resp->count);
458 xdr_ressize_check(rqstp, p);
459
460 /* now update rqstp->rq_res to reflect data aswell */
461 rqstp->rq_res.page_len = resp->count;
462 if (resp->count & 3) {
463 /* need to pad the tail */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464 rqstp->rq_res.tail[0].iov_base = p;
465 *p = 0;
466 rqstp->rq_res.tail[0].iov_len = 4 - (resp->count&3);
467 }
468 return 1;
469}
470
471int
Al Viro131a21c2006-10-19 23:28:56 -0700472nfssvc_encode_readdirres(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473 struct nfsd_readdirres *resp)
474{
475 xdr_ressize_check(rqstp, p);
476 p = resp->buffer;
477 *p++ = 0; /* no more entries */
478 *p++ = htonl((resp->common.err == nfserr_eof));
479 rqstp->rq_res.page_len = (((unsigned long)p-1) & ~PAGE_MASK)+1;
480
481 return 1;
482}
483
484int
Al Viro131a21c2006-10-19 23:28:56 -0700485nfssvc_encode_statfsres(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486 struct nfsd_statfsres *resp)
487{
488 struct kstatfs *stat = &resp->stats;
489
Greg Banks7adae482006-10-04 02:15:47 -0700490 *p++ = htonl(NFSSVC_MAXBLKSIZE_V2); /* max transfer size */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491 *p++ = htonl(stat->f_bsize);
492 *p++ = htonl(stat->f_blocks);
493 *p++ = htonl(stat->f_bfree);
494 *p++ = htonl(stat->f_bavail);
495 return xdr_ressize_check(rqstp, p);
496}
497
498int
NeilBrowna0ad13e2007-01-26 00:57:10 -0800499nfssvc_encode_entry(void *ccdv, const char *name,
500 int namlen, loff_t offset, u64 ino, unsigned int d_type)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501{
NeilBrowna0ad13e2007-01-26 00:57:10 -0800502 struct readdir_cd *ccd = ccdv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503 struct nfsd_readdirres *cd = container_of(ccd, struct nfsd_readdirres, common);
Al Viro131a21c2006-10-19 23:28:56 -0700504 __be32 *p = cd->buffer;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505 int buflen, slen;
506
507 /*
508 dprintk("nfsd: entry(%.*s off %ld ino %ld)\n",
509 namlen, name, offset, ino);
510 */
511
512 if (offset > ~((u32) 0)) {
513 cd->common.err = nfserr_fbig;
514 return -EINVAL;
515 }
516 if (cd->offset)
517 *cd->offset = htonl(offset);
518 if (namlen > NFS2_MAXNAMLEN)
519 namlen = NFS2_MAXNAMLEN;/* truncate filename */
520
521 slen = XDR_QUADLEN(namlen);
522 if ((buflen = cd->buflen - slen - 4) < 0) {
523 cd->common.err = nfserr_toosmall;
524 return -EINVAL;
525 }
526 *p++ = xdr_one; /* mark entry present */
527 *p++ = htonl((u32) ino); /* file id */
528 p = xdr_encode_array(p, name, namlen);/* name length & name */
529 cd->offset = p; /* remember pointer */
Al Viro131a21c2006-10-19 23:28:56 -0700530 *p++ = htonl(~0U); /* offset of next entry */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531
532 cd->buflen = buflen;
533 cd->buffer = p;
534 cd->common.err = nfs_ok;
535 return 0;
536}
537
538/*
539 * XDR release functions
540 */
541int
Al Viro131a21c2006-10-19 23:28:56 -0700542nfssvc_release_fhandle(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543 struct nfsd_fhandle *resp)
544{
545 fh_put(&resp->fh);
546 return 1;
547}