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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
Al Viro3dadecc2013-01-24 02:18:08 -05007#include "vfs.h"
Boaz Harrosh9a74af22009-12-03 20:30:56 +02008#include "xdr.h"
J. Bruce Fields2e8138a2007-11-15 17:05:43 -05009#include "auth.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070010
11#define NFSDDBG_FACILITY NFSDDBG_XDR
12
Linus Torvalds1da177e2005-04-16 15:20:36 -070013/*
14 * Mapping of S_IF* types to NFS file types
15 */
16static u32 nfs_ftypes[] = {
17 NFNON, NFCHR, NFCHR, NFBAD,
18 NFDIR, NFBAD, NFBLK, NFBAD,
19 NFREG, NFBAD, NFLNK, NFBAD,
20 NFSOCK, NFBAD, NFLNK, NFBAD,
21};
22
23
24/*
25 * XDR functions for basic NFS types
26 */
Al Viro131a21c2006-10-19 23:28:56 -070027static __be32 *
28decode_fh(__be32 *p, struct svc_fh *fhp)
Linus Torvalds1da177e2005-04-16 15:20:36 -070029{
30 fh_init(fhp, NFS_FHSIZE);
31 memcpy(&fhp->fh_handle.fh_base, p, NFS_FHSIZE);
32 fhp->fh_handle.fh_size = NFS_FHSIZE;
33
34 /* FIXME: Look up export pointer here and verify
35 * Sun Secure RPC if requested */
36 return p + (NFS_FHSIZE >> 2);
37}
38
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +000039/* Helper function for NFSv2 ACL code */
Al Viro131a21c2006-10-19 23:28:56 -070040__be32 *nfs2svc_decode_fh(__be32 *p, struct svc_fh *fhp)
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +000041{
42 return decode_fh(p, fhp);
43}
44
Adrian Bunk3ee6f612006-12-06 20:40:23 -080045static __be32 *
Al Viro131a21c2006-10-19 23:28:56 -070046encode_fh(__be32 *p, struct svc_fh *fhp)
Linus Torvalds1da177e2005-04-16 15:20:36 -070047{
48 memcpy(p, &fhp->fh_handle.fh_base, NFS_FHSIZE);
49 return p + (NFS_FHSIZE>> 2);
50}
51
52/*
53 * Decode a file name and make sure that the path contains
54 * no slashes or null bytes.
55 */
Adrian Bunk3ee6f612006-12-06 20:40:23 -080056static __be32 *
Chuck Leveree1a95b2007-11-01 16:56:58 -040057decode_filename(__be32 *p, char **namp, unsigned int *lenp)
Linus Torvalds1da177e2005-04-16 15:20:36 -070058{
59 char *name;
Chuck Leveree1a95b2007-11-01 16:56:58 -040060 unsigned int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -070061
62 if ((p = xdr_decode_string_inplace(p, namp, lenp, NFS_MAXNAMLEN)) != NULL) {
63 for (i = 0, name = *namp; i < *lenp; i++, name++) {
64 if (*name == '\0' || *name == '/')
65 return NULL;
66 }
67 }
68
69 return p;
70}
71
Adrian Bunk3ee6f612006-12-06 20:40:23 -080072static __be32 *
Chuck Lever9c7544d2007-11-01 16:57:14 -040073decode_pathname(__be32 *p, char **namp, unsigned int *lenp)
Linus Torvalds1da177e2005-04-16 15:20:36 -070074{
75 char *name;
Chuck Lever9c7544d2007-11-01 16:57:14 -040076 unsigned int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -070077
78 if ((p = xdr_decode_string_inplace(p, namp, lenp, NFS_MAXPATHLEN)) != NULL) {
79 for (i = 0, name = *namp; i < *lenp; i++, name++) {
80 if (*name == '\0')
81 return NULL;
82 }
83 }
84
85 return p;
86}
87
Adrian Bunk3ee6f612006-12-06 20:40:23 -080088static __be32 *
Al Viro131a21c2006-10-19 23:28:56 -070089decode_sattr(__be32 *p, struct iattr *iap)
Linus Torvalds1da177e2005-04-16 15:20:36 -070090{
91 u32 tmp, tmp1;
92
93 iap->ia_valid = 0;
94
95 /* Sun client bug compatibility check: some sun clients seem to
96 * put 0xffff in the mode field when they mean 0xffffffff.
97 * Quoting the 4.4BSD nfs server code: Nah nah nah nah na nah.
98 */
99 if ((tmp = ntohl(*p++)) != (u32)-1 && tmp != 0xffff) {
100 iap->ia_valid |= ATTR_MODE;
101 iap->ia_mode = tmp;
102 }
103 if ((tmp = ntohl(*p++)) != (u32)-1) {
Eric W. Biederman7c197232013-02-02 04:32:35 -0800104 iap->ia_uid = make_kuid(&init_user_ns, tmp);
105 if (uid_valid(iap->ia_uid))
106 iap->ia_valid |= ATTR_UID;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 }
108 if ((tmp = ntohl(*p++)) != (u32)-1) {
Eric W. Biederman7c197232013-02-02 04:32:35 -0800109 iap->ia_gid = make_kgid(&init_user_ns, tmp);
110 if (gid_valid(iap->ia_gid))
111 iap->ia_valid |= ATTR_GID;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112 }
113 if ((tmp = ntohl(*p++)) != (u32)-1) {
114 iap->ia_valid |= ATTR_SIZE;
115 iap->ia_size = tmp;
116 }
117 tmp = ntohl(*p++); tmp1 = ntohl(*p++);
118 if (tmp != (u32)-1 && tmp1 != (u32)-1) {
119 iap->ia_valid |= ATTR_ATIME | ATTR_ATIME_SET;
120 iap->ia_atime.tv_sec = tmp;
121 iap->ia_atime.tv_nsec = tmp1 * 1000;
122 }
123 tmp = ntohl(*p++); tmp1 = ntohl(*p++);
124 if (tmp != (u32)-1 && tmp1 != (u32)-1) {
125 iap->ia_valid |= ATTR_MTIME | ATTR_MTIME_SET;
126 iap->ia_mtime.tv_sec = tmp;
127 iap->ia_mtime.tv_nsec = tmp1 * 1000;
128 /*
129 * Passing the invalid value useconds=1000000 for mtime
130 * is a Sun convention for "set both mtime and atime to
131 * current server time". It's needed to make permissions
132 * checks for the "touch" program across v2 mounts to
133 * Solaris and Irix boxes work correctly. See description of
134 * sattr in section 6.1 of "NFS Illustrated" by
135 * Brent Callaghan, Addison-Wesley, ISBN 0-201-32750-5
136 */
137 if (tmp1 == 1000000)
138 iap->ia_valid &= ~(ATTR_ATIME_SET|ATTR_MTIME_SET);
139 }
140 return p;
141}
142
Al Viro131a21c2006-10-19 23:28:56 -0700143static __be32 *
144encode_fattr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp,
David Shawa334de22006-01-06 00:19:58 -0800145 struct kstat *stat)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147 struct dentry *dentry = fhp->fh_dentry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148 int type;
149 struct timespec time;
NeilBrownaf6a4e22007-02-14 00:33:12 -0800150 u32 f;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151
David Shawa334de22006-01-06 00:19:58 -0800152 type = (stat->mode & S_IFMT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153
154 *p++ = htonl(nfs_ftypes[type >> 12]);
J. Bruce Fields082f31a2014-04-03 15:10:35 -0400155 *p++ = htonl((u32) stat->mode);
David Shawa334de22006-01-06 00:19:58 -0800156 *p++ = htonl((u32) stat->nlink);
Eric W. Biederman7c197232013-02-02 04:32:35 -0800157 *p++ = htonl((u32) from_kuid(&init_user_ns, stat->uid));
158 *p++ = htonl((u32) from_kgid(&init_user_ns, stat->gid));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159
David Shawa334de22006-01-06 00:19:58 -0800160 if (S_ISLNK(type) && stat->size > NFS_MAXPATHLEN) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161 *p++ = htonl(NFS_MAXPATHLEN);
162 } else {
David Shawa334de22006-01-06 00:19:58 -0800163 *p++ = htonl((u32) stat->size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164 }
David Shawa334de22006-01-06 00:19:58 -0800165 *p++ = htonl((u32) stat->blksize);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166 if (S_ISCHR(type) || S_ISBLK(type))
David Shawa334de22006-01-06 00:19:58 -0800167 *p++ = htonl(new_encode_dev(stat->rdev));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168 else
169 *p++ = htonl(0xffffffff);
David Shawa334de22006-01-06 00:19:58 -0800170 *p++ = htonl((u32) stat->blocks);
NeilBrownaf6a4e22007-02-14 00:33:12 -0800171 switch (fsid_source(fhp)) {
172 default:
173 case FSIDSOURCE_DEV:
David Shawa334de22006-01-06 00:19:58 -0800174 *p++ = htonl(new_encode_dev(stat->dev));
NeilBrownaf6a4e22007-02-14 00:33:12 -0800175 break;
176 case FSIDSOURCE_FSID:
177 *p++ = htonl((u32) fhp->fh_export->ex_fsid);
178 break;
179 case FSIDSOURCE_UUID:
180 f = ((u32*)fhp->fh_export->ex_uuid)[0];
181 f ^= ((u32*)fhp->fh_export->ex_uuid)[1];
182 f ^= ((u32*)fhp->fh_export->ex_uuid)[2];
183 f ^= ((u32*)fhp->fh_export->ex_uuid)[3];
184 *p++ = htonl(f);
185 break;
186 }
David Shawa334de22006-01-06 00:19:58 -0800187 *p++ = htonl((u32) stat->ino);
188 *p++ = htonl((u32) stat->atime.tv_sec);
189 *p++ = htonl(stat->atime.tv_nsec ? stat->atime.tv_nsec / 1000 : 0);
David Howells2b0143b2015-03-17 22:25:59 +0000190 lease_get_mtime(d_inode(dentry), &time);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191 *p++ = htonl((u32) time.tv_sec);
192 *p++ = htonl(time.tv_nsec ? time.tv_nsec / 1000 : 0);
David Shawa334de22006-01-06 00:19:58 -0800193 *p++ = htonl((u32) stat->ctime.tv_sec);
194 *p++ = htonl(stat->ctime.tv_nsec ? stat->ctime.tv_nsec / 1000 : 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195
196 return p;
197}
198
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000199/* Helper function for NFSv2 ACL code */
J. Bruce Fields4f4a4fa2013-02-01 15:13:04 -0500200__be32 *nfs2svc_encode_fattr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp, struct kstat *stat)
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000201{
J. Bruce Fields4f4a4fa2013-02-01 15:13:04 -0500202 return encode_fattr(rqstp, p, fhp, stat);
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000203}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204
205/*
206 * XDR decode functions
207 */
208int
Al Viro131a21c2006-10-19 23:28:56 -0700209nfssvc_decode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210{
211 return xdr_argsize_check(rqstp, p);
212}
213
214int
Al Viro131a21c2006-10-19 23:28:56 -0700215nfssvc_decode_fhandle(struct svc_rqst *rqstp, __be32 *p, struct nfsd_fhandle *args)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216{
Benoit Tained40aa332014-05-22 16:32:30 +0200217 p = decode_fh(p, &args->fh);
218 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 return 0;
220 return xdr_argsize_check(rqstp, p);
221}
222
223int
Al Viro131a21c2006-10-19 23:28:56 -0700224nfssvc_decode_sattrargs(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225 struct nfsd_sattrargs *args)
226{
NeilBrown072f62e2007-05-09 02:34:57 -0700227 p = decode_fh(p, &args->fh);
228 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 return 0;
NeilBrown072f62e2007-05-09 02:34:57 -0700230 p = decode_sattr(p, &args->attrs);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231
232 return xdr_argsize_check(rqstp, p);
233}
234
235int
Al Viro131a21c2006-10-19 23:28:56 -0700236nfssvc_decode_diropargs(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237 struct nfsd_diropargs *args)
238{
239 if (!(p = decode_fh(p, &args->fh))
240 || !(p = decode_filename(p, &args->name, &args->len)))
241 return 0;
242
Christophe JAILLETd28c4422016-07-02 08:24:32 +0200243 return xdr_argsize_check(rqstp, p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244}
245
246int
Al Viro131a21c2006-10-19 23:28:56 -0700247nfssvc_decode_readargs(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 struct nfsd_readargs *args)
249{
250 unsigned int len;
J. Bruce Fieldsafc59402012-12-10 18:01:37 -0500251 int v;
Benoit Tained40aa332014-05-22 16:32:30 +0200252 p = decode_fh(p, &args->fh);
253 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254 return 0;
255
256 args->offset = ntohl(*p++);
257 len = args->count = ntohl(*p++);
258 p++; /* totalcount - unused */
259
Kinglong Mee3c7aa152014-06-10 18:08:19 +0800260 len = min_t(unsigned int, len, NFSSVC_MAXBLKSIZE_V2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261
262 /* set up somewhere to store response.
263 * We take pages, put them on reslist and include in iovec
264 */
265 v=0;
266 while (len > 0) {
J. Bruce Fieldsafc59402012-12-10 18:01:37 -0500267 struct page *p = *(rqstp->rq_next_page++);
268
269 rqstp->rq_vec[v].iov_base = page_address(p);
Kinglong Mee3c7aa152014-06-10 18:08:19 +0800270 rqstp->rq_vec[v].iov_len = min_t(unsigned int, len, PAGE_SIZE);
NeilBrown3cc03b12006-10-04 02:15:47 -0700271 len -= rqstp->rq_vec[v].iov_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272 v++;
273 }
274 args->vlen = v;
275 return xdr_argsize_check(rqstp, p);
276}
277
278int
Al Viro131a21c2006-10-19 23:28:56 -0700279nfssvc_decode_writeargs(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280 struct nfsd_writeargs *args)
281{
Peter Staubachf34b9562007-05-09 02:34:48 -0700282 unsigned int len, hdr, dlen;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283 int v;
Peter Staubachf34b9562007-05-09 02:34:48 -0700284
Benoit Tained40aa332014-05-22 16:32:30 +0200285 p = decode_fh(p, &args->fh);
286 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287 return 0;
288
289 p++; /* beginoffset */
290 args->offset = ntohl(*p++); /* offset */
291 p++; /* totalcount */
292 len = args->len = ntohl(*p++);
Peter Staubachf34b9562007-05-09 02:34:48 -0700293 /*
294 * The protocol specifies a maximum of 8192 bytes.
295 */
Greg Banks7adae482006-10-04 02:15:47 -0700296 if (len > NFSSVC_MAXBLKSIZE_V2)
Peter Staubachf34b9562007-05-09 02:34:48 -0700297 return 0;
298
299 /*
300 * Check to make sure that we got the right number of
301 * bytes.
Peter Staubachf34b9562007-05-09 02:34:48 -0700302 */
303 hdr = (void*)p - rqstp->rq_arg.head[0].iov_base;
NeilBrown072f62e2007-05-09 02:34:57 -0700304 dlen = rqstp->rq_arg.head[0].iov_len + rqstp->rq_arg.page_len
305 - hdr;
306
Peter Staubachf34b9562007-05-09 02:34:48 -0700307 /*
308 * Round the length of the data which was specified up to
309 * the next multiple of XDR units and then compare that
310 * against the length which was actually received.
NeilBrownba67a392008-01-11 17:06:52 -0500311 * Note that when RPCSEC/GSS (for example) is used, the
312 * data buffer can be padded so dlen might be larger
313 * than required. It must never be smaller.
Peter Staubachf34b9562007-05-09 02:34:48 -0700314 */
NeilBrownba67a392008-01-11 17:06:52 -0500315 if (dlen < XDR_QUADLEN(len)*4)
Peter Staubachf34b9562007-05-09 02:34:48 -0700316 return 0;
317
318 rqstp->rq_vec[0].iov_base = (void*)p;
319 rqstp->rq_vec[0].iov_len = rqstp->rq_arg.head[0].iov_len - hdr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320 v = 0;
NeilBrown3cc03b12006-10-04 02:15:47 -0700321 while (len > rqstp->rq_vec[v].iov_len) {
322 len -= rqstp->rq_vec[v].iov_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323 v++;
NeilBrown3cc03b12006-10-04 02:15:47 -0700324 rqstp->rq_vec[v].iov_base = page_address(rqstp->rq_pages[v]);
325 rqstp->rq_vec[v].iov_len = PAGE_SIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326 }
NeilBrown3cc03b12006-10-04 02:15:47 -0700327 rqstp->rq_vec[v].iov_len = len;
Peter Staubachf34b9562007-05-09 02:34:48 -0700328 args->vlen = v + 1;
329 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330}
331
332int
Al Viro131a21c2006-10-19 23:28:56 -0700333nfssvc_decode_createargs(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334 struct nfsd_createargs *args)
335{
NeilBrown072f62e2007-05-09 02:34:57 -0700336 if ( !(p = decode_fh(p, &args->fh))
337 || !(p = decode_filename(p, &args->name, &args->len)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338 return 0;
NeilBrown072f62e2007-05-09 02:34:57 -0700339 p = decode_sattr(p, &args->attrs);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340
341 return xdr_argsize_check(rqstp, p);
342}
343
344int
Al Viro131a21c2006-10-19 23:28:56 -0700345nfssvc_decode_renameargs(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346 struct nfsd_renameargs *args)
347{
348 if (!(p = decode_fh(p, &args->ffh))
349 || !(p = decode_filename(p, &args->fname, &args->flen))
350 || !(p = decode_fh(p, &args->tfh))
351 || !(p = decode_filename(p, &args->tname, &args->tlen)))
352 return 0;
353
354 return xdr_argsize_check(rqstp, p);
355}
356
357int
Al Viro131a21c2006-10-19 23:28:56 -0700358nfssvc_decode_readlinkargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd_readlinkargs *args)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359{
Benoit Tained40aa332014-05-22 16:32:30 +0200360 p = decode_fh(p, &args->fh);
361 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362 return 0;
J. Bruce Fieldsafc59402012-12-10 18:01:37 -0500363 args->buffer = page_address(*(rqstp->rq_next_page++));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364
365 return xdr_argsize_check(rqstp, p);
366}
367
368int
Al Viro131a21c2006-10-19 23:28:56 -0700369nfssvc_decode_linkargs(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 struct nfsd_linkargs *args)
371{
372 if (!(p = decode_fh(p, &args->ffh))
373 || !(p = decode_fh(p, &args->tfh))
374 || !(p = decode_filename(p, &args->tname, &args->tlen)))
375 return 0;
376
377 return xdr_argsize_check(rqstp, p);
378}
379
380int
Al Viro131a21c2006-10-19 23:28:56 -0700381nfssvc_decode_symlinkargs(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382 struct nfsd_symlinkargs *args)
383{
NeilBrown072f62e2007-05-09 02:34:57 -0700384 if ( !(p = decode_fh(p, &args->ffh))
385 || !(p = decode_filename(p, &args->fname, &args->flen))
386 || !(p = decode_pathname(p, &args->tname, &args->tlen)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387 return 0;
NeilBrown072f62e2007-05-09 02:34:57 -0700388 p = decode_sattr(p, &args->attrs);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389
390 return xdr_argsize_check(rqstp, p);
391}
392
393int
Al Viro131a21c2006-10-19 23:28:56 -0700394nfssvc_decode_readdirargs(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395 struct nfsd_readdirargs *args)
396{
Benoit Tained40aa332014-05-22 16:32:30 +0200397 p = decode_fh(p, &args->fh);
398 if (!p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399 return 0;
400 args->cookie = ntohl(*p++);
401 args->count = ntohl(*p++);
Kinglong Mee3c7aa152014-06-10 18:08:19 +0800402 args->count = min_t(u32, args->count, PAGE_SIZE);
J. Bruce Fieldsafc59402012-12-10 18:01:37 -0500403 args->buffer = page_address(*(rqstp->rq_next_page++));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404
405 return xdr_argsize_check(rqstp, p);
406}
407
408/*
409 * XDR encode functions
410 */
411int
Al Viro131a21c2006-10-19 23:28:56 -0700412nfssvc_encode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413{
414 return xdr_ressize_check(rqstp, p);
415}
416
417int
Al Viro131a21c2006-10-19 23:28:56 -0700418nfssvc_encode_attrstat(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419 struct nfsd_attrstat *resp)
420{
David Shawa334de22006-01-06 00:19:58 -0800421 p = encode_fattr(rqstp, p, &resp->fh, &resp->stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422 return xdr_ressize_check(rqstp, p);
423}
424
425int
Al Viro131a21c2006-10-19 23:28:56 -0700426nfssvc_encode_diropres(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427 struct nfsd_diropres *resp)
428{
429 p = encode_fh(p, &resp->fh);
David Shawa334de22006-01-06 00:19:58 -0800430 p = encode_fattr(rqstp, p, &resp->fh, &resp->stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431 return xdr_ressize_check(rqstp, p);
432}
433
434int
Al Viro131a21c2006-10-19 23:28:56 -0700435nfssvc_encode_readlinkres(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436 struct nfsd_readlinkres *resp)
437{
438 *p++ = htonl(resp->len);
439 xdr_ressize_check(rqstp, p);
440 rqstp->rq_res.page_len = resp->len;
441 if (resp->len & 3) {
442 /* need to pad the tail */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443 rqstp->rq_res.tail[0].iov_base = p;
444 *p = 0;
445 rqstp->rq_res.tail[0].iov_len = 4 - (resp->len&3);
446 }
447 return 1;
448}
449
450int
Al Viro131a21c2006-10-19 23:28:56 -0700451nfssvc_encode_readres(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452 struct nfsd_readres *resp)
453{
David Shawa334de22006-01-06 00:19:58 -0800454 p = encode_fattr(rqstp, p, &resp->fh, &resp->stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455 *p++ = htonl(resp->count);
456 xdr_ressize_check(rqstp, p);
457
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300458 /* now update rqstp->rq_res to reflect data as well */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459 rqstp->rq_res.page_len = resp->count;
460 if (resp->count & 3) {
461 /* need to pad the tail */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462 rqstp->rq_res.tail[0].iov_base = p;
463 *p = 0;
464 rqstp->rq_res.tail[0].iov_len = 4 - (resp->count&3);
465 }
466 return 1;
467}
468
469int
Al Viro131a21c2006-10-19 23:28:56 -0700470nfssvc_encode_readdirres(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471 struct nfsd_readdirres *resp)
472{
473 xdr_ressize_check(rqstp, p);
474 p = resp->buffer;
475 *p++ = 0; /* no more entries */
476 *p++ = htonl((resp->common.err == nfserr_eof));
477 rqstp->rq_res.page_len = (((unsigned long)p-1) & ~PAGE_MASK)+1;
478
479 return 1;
480}
481
482int
Al Viro131a21c2006-10-19 23:28:56 -0700483nfssvc_encode_statfsres(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484 struct nfsd_statfsres *resp)
485{
486 struct kstatfs *stat = &resp->stats;
487
Greg Banks7adae482006-10-04 02:15:47 -0700488 *p++ = htonl(NFSSVC_MAXBLKSIZE_V2); /* max transfer size */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489 *p++ = htonl(stat->f_bsize);
490 *p++ = htonl(stat->f_blocks);
491 *p++ = htonl(stat->f_bfree);
492 *p++ = htonl(stat->f_bavail);
493 return xdr_ressize_check(rqstp, p);
494}
495
496int
NeilBrowna0ad13e2007-01-26 00:57:10 -0800497nfssvc_encode_entry(void *ccdv, const char *name,
498 int namlen, loff_t offset, u64 ino, unsigned int d_type)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499{
NeilBrowna0ad13e2007-01-26 00:57:10 -0800500 struct readdir_cd *ccd = ccdv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501 struct nfsd_readdirres *cd = container_of(ccd, struct nfsd_readdirres, common);
Al Viro131a21c2006-10-19 23:28:56 -0700502 __be32 *p = cd->buffer;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503 int buflen, slen;
504
505 /*
506 dprintk("nfsd: entry(%.*s off %ld ino %ld)\n",
507 namlen, name, offset, ino);
508 */
509
510 if (offset > ~((u32) 0)) {
511 cd->common.err = nfserr_fbig;
512 return -EINVAL;
513 }
514 if (cd->offset)
515 *cd->offset = htonl(offset);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516
Kinglong Mee3c7aa152014-06-10 18:08:19 +0800517 /* truncate filename */
518 namlen = min(namlen, NFS2_MAXNAMLEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519 slen = XDR_QUADLEN(namlen);
Kinglong Mee3c7aa152014-06-10 18:08:19 +0800520
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521 if ((buflen = cd->buflen - slen - 4) < 0) {
522 cd->common.err = nfserr_toosmall;
523 return -EINVAL;
524 }
Peter Staubach40ee5dc2007-08-16 12:10:07 -0400525 if (ino > ~((u32) 0)) {
526 cd->common.err = nfserr_fbig;
527 return -EINVAL;
528 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529 *p++ = xdr_one; /* mark entry present */
530 *p++ = htonl((u32) ino); /* file id */
531 p = xdr_encode_array(p, name, namlen);/* name length & name */
532 cd->offset = p; /* remember pointer */
Al Viro131a21c2006-10-19 23:28:56 -0700533 *p++ = htonl(~0U); /* offset of next entry */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534
535 cd->buflen = buflen;
536 cd->buffer = p;
537 cd->common.err = nfs_ok;
538 return 0;
539}
540
541/*
542 * XDR release functions
543 */
544int
Al Viro131a21c2006-10-19 23:28:56 -0700545nfssvc_release_fhandle(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546 struct nfsd_fhandle *resp)
547{
548 fh_put(&resp->fh);
549 return 1;
550}