blob: 7e84a852cdae8117334fec6ee00d085fc29c0c66 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 * XDR support for nfsd/protocol version 3.
3 *
4 * Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@monad.swb.de>
5 *
6 * 2003-08-09 Jamie Lokier: Use htonl() for nanoseconds, not htons()!
7 */
8
Linus Torvalds1da177e2005-04-16 15:20:36 -07009#include <linux/namei.h>
Boaz Harrosh9a74af22009-12-03 20:30:56 +020010#include "xdr3.h"
J. Bruce Fields2e8138a2007-11-15 17:05:43 -050011#include "auth.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070012
13#define NFSDDBG_FACILITY NFSDDBG_XDR
14
Linus Torvalds1da177e2005-04-16 15:20:36 -070015
16/*
17 * Mapping of S_IF* types to NFS file types
18 */
19static u32 nfs3_ftypes[] = {
20 NF3NON, NF3FIFO, NF3CHR, NF3BAD,
21 NF3DIR, NF3BAD, NF3BLK, NF3BAD,
22 NF3REG, NF3BAD, NF3LNK, NF3BAD,
23 NF3SOCK, NF3BAD, NF3LNK, NF3BAD,
24};
25
26/*
27 * XDR functions for basic NFS types
28 */
Adrian Bunk3ee6f612006-12-06 20:40:23 -080029static __be32 *
Al Viro91f07162006-10-19 23:28:57 -070030encode_time3(__be32 *p, struct timespec *time)
Linus Torvalds1da177e2005-04-16 15:20:36 -070031{
32 *p++ = htonl((u32) time->tv_sec); *p++ = htonl(time->tv_nsec);
33 return p;
34}
35
Adrian Bunk3ee6f612006-12-06 20:40:23 -080036static __be32 *
Al Viro91f07162006-10-19 23:28:57 -070037decode_time3(__be32 *p, struct timespec *time)
Linus Torvalds1da177e2005-04-16 15:20:36 -070038{
39 time->tv_sec = ntohl(*p++);
40 time->tv_nsec = ntohl(*p++);
41 return p;
42}
43
Adrian Bunk3ee6f612006-12-06 20:40:23 -080044static __be32 *
Al Viro91f07162006-10-19 23:28:57 -070045decode_fh(__be32 *p, struct svc_fh *fhp)
Linus Torvalds1da177e2005-04-16 15:20:36 -070046{
47 unsigned int size;
48 fh_init(fhp, NFS3_FHSIZE);
49 size = ntohl(*p++);
50 if (size > NFS3_FHSIZE)
51 return NULL;
52
53 memcpy(&fhp->fh_handle.fh_base, p, size);
54 fhp->fh_handle.fh_size = size;
55 return p + XDR_QUADLEN(size);
56}
57
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +000058/* Helper function for NFSv3 ACL code */
Al Viro91f07162006-10-19 23:28:57 -070059__be32 *nfs3svc_decode_fh(__be32 *p, struct svc_fh *fhp)
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +000060{
61 return decode_fh(p, fhp);
62}
63
Adrian Bunk3ee6f612006-12-06 20:40:23 -080064static __be32 *
Al Viro91f07162006-10-19 23:28:57 -070065encode_fh(__be32 *p, struct svc_fh *fhp)
Linus Torvalds1da177e2005-04-16 15:20:36 -070066{
67 unsigned int size = fhp->fh_handle.fh_size;
68 *p++ = htonl(size);
69 if (size) p[XDR_QUADLEN(size)-1]=0;
70 memcpy(p, &fhp->fh_handle.fh_base, size);
71 return p + XDR_QUADLEN(size);
72}
73
74/*
75 * Decode a file name and make sure that the path contains
76 * no slashes or null bytes.
77 */
Adrian Bunk3ee6f612006-12-06 20:40:23 -080078static __be32 *
Chuck Leveree1a95b2007-11-01 16:56:58 -040079decode_filename(__be32 *p, char **namp, unsigned int *lenp)
Linus Torvalds1da177e2005-04-16 15:20:36 -070080{
81 char *name;
Chuck Leveree1a95b2007-11-01 16:56:58 -040082 unsigned int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -070083
84 if ((p = xdr_decode_string_inplace(p, namp, lenp, NFS3_MAXNAMLEN)) != NULL) {
85 for (i = 0, name = *namp; i < *lenp; i++, name++) {
86 if (*name == '\0' || *name == '/')
87 return NULL;
88 }
89 }
90
91 return p;
92}
93
Adrian Bunk3ee6f612006-12-06 20:40:23 -080094static __be32 *
Al Viro91f07162006-10-19 23:28:57 -070095decode_sattr3(__be32 *p, struct iattr *iap)
Linus Torvalds1da177e2005-04-16 15:20:36 -070096{
97 u32 tmp;
98
99 iap->ia_valid = 0;
100
101 if (*p++) {
102 iap->ia_valid |= ATTR_MODE;
103 iap->ia_mode = ntohl(*p++);
104 }
105 if (*p++) {
106 iap->ia_valid |= ATTR_UID;
107 iap->ia_uid = ntohl(*p++);
108 }
109 if (*p++) {
110 iap->ia_valid |= ATTR_GID;
111 iap->ia_gid = ntohl(*p++);
112 }
113 if (*p++) {
114 u64 newsize;
115
116 iap->ia_valid |= ATTR_SIZE;
117 p = xdr_decode_hyper(p, &newsize);
118 if (newsize <= NFS_OFFSET_MAX)
119 iap->ia_size = newsize;
120 else
121 iap->ia_size = NFS_OFFSET_MAX;
122 }
123 if ((tmp = ntohl(*p++)) == 1) { /* set to server time */
124 iap->ia_valid |= ATTR_ATIME;
125 } else if (tmp == 2) { /* set to client time */
126 iap->ia_valid |= ATTR_ATIME | ATTR_ATIME_SET;
127 iap->ia_atime.tv_sec = ntohl(*p++);
128 iap->ia_atime.tv_nsec = ntohl(*p++);
129 }
130 if ((tmp = ntohl(*p++)) == 1) { /* set to server time */
131 iap->ia_valid |= ATTR_MTIME;
132 } else if (tmp == 2) { /* set to client time */
133 iap->ia_valid |= ATTR_MTIME | ATTR_MTIME_SET;
134 iap->ia_mtime.tv_sec = ntohl(*p++);
135 iap->ia_mtime.tv_nsec = ntohl(*p++);
136 }
137 return p;
138}
139
NeilBrownaf6a4e22007-02-14 00:33:12 -0800140static __be32 *encode_fsid(__be32 *p, struct svc_fh *fhp)
141{
142 u64 f;
143 switch(fsid_source(fhp)) {
144 default:
145 case FSIDSOURCE_DEV:
146 p = xdr_encode_hyper(p, (u64)huge_encode_dev
147 (fhp->fh_dentry->d_inode->i_sb->s_dev));
148 break;
149 case FSIDSOURCE_FSID:
150 p = xdr_encode_hyper(p, (u64) fhp->fh_export->ex_fsid);
151 break;
152 case FSIDSOURCE_UUID:
153 f = ((u64*)fhp->fh_export->ex_uuid)[0];
154 f ^= ((u64*)fhp->fh_export->ex_uuid)[1];
155 p = xdr_encode_hyper(p, f);
156 break;
157 }
158 return p;
159}
160
Adrian Bunk3ee6f612006-12-06 20:40:23 -0800161static __be32 *
Al Viro91f07162006-10-19 23:28:57 -0700162encode_fattr3(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp,
David Shawa334de22006-01-06 00:19:58 -0800163 struct kstat *stat)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164{
David Shawa334de22006-01-06 00:19:58 -0800165 *p++ = htonl(nfs3_ftypes[(stat->mode & S_IFMT) >> 12]);
166 *p++ = htonl((u32) stat->mode);
167 *p++ = htonl((u32) stat->nlink);
168 *p++ = htonl((u32) nfsd_ruid(rqstp, stat->uid));
169 *p++ = htonl((u32) nfsd_rgid(rqstp, stat->gid));
170 if (S_ISLNK(stat->mode) && stat->size > NFS3_MAXPATHLEN) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 p = xdr_encode_hyper(p, (u64) NFS3_MAXPATHLEN);
172 } else {
David Shawa334de22006-01-06 00:19:58 -0800173 p = xdr_encode_hyper(p, (u64) stat->size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174 }
David Shawa334de22006-01-06 00:19:58 -0800175 p = xdr_encode_hyper(p, ((u64)stat->blocks) << 9);
176 *p++ = htonl((u32) MAJOR(stat->rdev));
177 *p++ = htonl((u32) MINOR(stat->rdev));
NeilBrownaf6a4e22007-02-14 00:33:12 -0800178 p = encode_fsid(p, fhp);
Peter Staubach40ee5dc2007-08-16 12:10:07 -0400179 p = xdr_encode_hyper(p, stat->ino);
David Shawa334de22006-01-06 00:19:58 -0800180 p = encode_time3(p, &stat->atime);
Peter Staubach40ee5dc2007-08-16 12:10:07 -0400181 p = encode_time3(p, &stat->mtime);
David Shawa334de22006-01-06 00:19:58 -0800182 p = encode_time3(p, &stat->ctime);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183
184 return p;
185}
186
Adrian Bunk3ee6f612006-12-06 20:40:23 -0800187static __be32 *
Al Viro91f07162006-10-19 23:28:57 -0700188encode_saved_post_attr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 /* Attributes to follow */
191 *p++ = xdr_one;
Peter Staubach40ee5dc2007-08-16 12:10:07 -0400192 return encode_fattr3(rqstp, p, fhp, &fhp->fh_post_attr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193}
194
195/*
196 * Encode post-operation attributes.
197 * The inode may be NULL if the call failed because of a stale file
198 * handle. In this case, no attributes are returned.
199 */
Al Viro91f07162006-10-19 23:28:57 -0700200static __be32 *
201encode_post_op_attr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202{
203 struct dentry *dentry = fhp->fh_dentry;
NeilBrown072f62e2007-05-09 02:34:57 -0700204 if (dentry && dentry->d_inode) {
David Shawa334de22006-01-06 00:19:58 -0800205 int err;
206 struct kstat stat;
207
Jan Blunck54775492008-02-14 19:38:39 -0800208 err = vfs_getattr(fhp->fh_export->ex_path.mnt, dentry, &stat);
David Shawa334de22006-01-06 00:19:58 -0800209 if (!err) {
210 *p++ = xdr_one; /* attributes follow */
Peter Staubach40ee5dc2007-08-16 12:10:07 -0400211 lease_get_mtime(dentry->d_inode, &stat.mtime);
David Shawa334de22006-01-06 00:19:58 -0800212 return encode_fattr3(rqstp, p, fhp, &stat);
213 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 }
215 *p++ = xdr_zero;
216 return p;
217}
218
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000219/* Helper for NFSv3 ACLs */
Al Viro91f07162006-10-19 23:28:57 -0700220__be32 *
221nfs3svc_encode_post_op_attr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp)
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000222{
223 return encode_post_op_attr(rqstp, p, fhp);
224}
225
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226/*
227 * Enocde weak cache consistency data
228 */
Al Viro91f07162006-10-19 23:28:57 -0700229static __be32 *
230encode_wcc_data(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231{
232 struct dentry *dentry = fhp->fh_dentry;
233
234 if (dentry && dentry->d_inode && fhp->fh_post_saved) {
235 if (fhp->fh_pre_saved) {
236 *p++ = xdr_one;
237 p = xdr_encode_hyper(p, (u64) fhp->fh_pre_size);
238 p = encode_time3(p, &fhp->fh_pre_mtime);
239 p = encode_time3(p, &fhp->fh_pre_ctime);
240 } else {
241 *p++ = xdr_zero;
242 }
243 return encode_saved_post_attr(rqstp, p, fhp);
244 }
245 /* no pre- or post-attrs */
246 *p++ = xdr_zero;
247 return encode_post_op_attr(rqstp, p, fhp);
248}
249
Peter Staubach40ee5dc2007-08-16 12:10:07 -0400250/*
251 * Fill in the post_op attr for the wcc data
252 */
253void fill_post_wcc(struct svc_fh *fhp)
254{
255 int err;
256
257 if (fhp->fh_post_saved)
258 printk("nfsd: inode locked twice during operation.\n");
259
Jan Blunck54775492008-02-14 19:38:39 -0800260 err = vfs_getattr(fhp->fh_export->ex_path.mnt, fhp->fh_dentry,
Peter Staubach40ee5dc2007-08-16 12:10:07 -0400261 &fhp->fh_post_attr);
J. Bruce Fieldsc654b8a2009-04-16 17:33:25 -0400262 fhp->fh_post_change = fhp->fh_dentry->d_inode->i_version;
Neil Brownc1ac3ff2010-12-02 11:14:30 +1100263 if (err) {
Peter Staubach40ee5dc2007-08-16 12:10:07 -0400264 fhp->fh_post_saved = 0;
Neil Brownc1ac3ff2010-12-02 11:14:30 +1100265 /* Grab the ctime anyway - set_change_info might use it */
266 fhp->fh_post_attr.ctime = fhp->fh_dentry->d_inode->i_ctime;
267 } else
Peter Staubach40ee5dc2007-08-16 12:10:07 -0400268 fhp->fh_post_saved = 1;
269}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270
271/*
272 * XDR decode functions
273 */
274int
Al Viro91f07162006-10-19 23:28:57 -0700275nfs3svc_decode_fhandle(struct svc_rqst *rqstp, __be32 *p, struct nfsd_fhandle *args)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276{
277 if (!(p = decode_fh(p, &args->fh)))
278 return 0;
279 return xdr_argsize_check(rqstp, p);
280}
281
282int
Al Viro91f07162006-10-19 23:28:57 -0700283nfs3svc_decode_sattrargs(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284 struct nfsd3_sattrargs *args)
285{
NeilBrown072f62e2007-05-09 02:34:57 -0700286 if (!(p = decode_fh(p, &args->fh)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287 return 0;
NeilBrown072f62e2007-05-09 02:34:57 -0700288 p = decode_sattr3(p, &args->attrs);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289
290 if ((args->check_guard = ntohl(*p++)) != 0) {
291 struct timespec time;
292 p = decode_time3(p, &time);
293 args->guardtime = time.tv_sec;
294 }
295
296 return xdr_argsize_check(rqstp, p);
297}
298
299int
Al Viro91f07162006-10-19 23:28:57 -0700300nfs3svc_decode_diropargs(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 struct nfsd3_diropargs *args)
302{
303 if (!(p = decode_fh(p, &args->fh))
304 || !(p = decode_filename(p, &args->name, &args->len)))
305 return 0;
306
307 return xdr_argsize_check(rqstp, p);
308}
309
310int
Al Viro91f07162006-10-19 23:28:57 -0700311nfs3svc_decode_accessargs(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312 struct nfsd3_accessargs *args)
313{
314 if (!(p = decode_fh(p, &args->fh)))
315 return 0;
316 args->access = ntohl(*p++);
317
318 return xdr_argsize_check(rqstp, p);
319}
320
321int
Al Viro91f07162006-10-19 23:28:57 -0700322nfs3svc_decode_readargs(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323 struct nfsd3_readargs *args)
324{
325 unsigned int len;
326 int v,pn;
Greg Banks7adae482006-10-04 02:15:47 -0700327 u32 max_blocksize = svc_max_payload(rqstp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328
NeilBrown072f62e2007-05-09 02:34:57 -0700329 if (!(p = decode_fh(p, &args->fh)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330 return 0;
NeilBrown072f62e2007-05-09 02:34:57 -0700331 p = xdr_decode_hyper(p, &args->offset);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332
333 len = args->count = ntohl(*p++);
334
Greg Banks7adae482006-10-04 02:15:47 -0700335 if (len > max_blocksize)
336 len = max_blocksize;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337
338 /* set up the kvec */
339 v=0;
340 while (len > 0) {
NeilBrown44524352006-10-04 02:15:46 -0700341 pn = rqstp->rq_resused++;
NeilBrown3cc03b12006-10-04 02:15:47 -0700342 rqstp->rq_vec[v].iov_base = page_address(rqstp->rq_respages[pn]);
343 rqstp->rq_vec[v].iov_len = len < PAGE_SIZE? len : PAGE_SIZE;
344 len -= rqstp->rq_vec[v].iov_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345 v++;
346 }
347 args->vlen = v;
348 return xdr_argsize_check(rqstp, p);
349}
350
351int
Al Viro91f07162006-10-19 23:28:57 -0700352nfs3svc_decode_writeargs(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353 struct nfsd3_writeargs *args)
354{
Peter Staubachf34b9562007-05-09 02:34:48 -0700355 unsigned int len, v, hdr, dlen;
Greg Banks7adae482006-10-04 02:15:47 -0700356 u32 max_blocksize = svc_max_payload(rqstp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357
NeilBrown072f62e2007-05-09 02:34:57 -0700358 if (!(p = decode_fh(p, &args->fh)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359 return 0;
NeilBrown072f62e2007-05-09 02:34:57 -0700360 p = xdr_decode_hyper(p, &args->offset);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361
362 args->count = ntohl(*p++);
363 args->stable = ntohl(*p++);
364 len = args->len = ntohl(*p++);
Peter Staubachf34b9562007-05-09 02:34:48 -0700365 /*
366 * The count must equal the amount of data passed.
367 */
368 if (args->count != args->len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369 return 0;
370
Peter Staubachf34b9562007-05-09 02:34:48 -0700371 /*
372 * Check to make sure that we got the right number of
373 * bytes.
Peter Staubachf34b9562007-05-09 02:34:48 -0700374 */
375 hdr = (void*)p - rqstp->rq_arg.head[0].iov_base;
NeilBrown072f62e2007-05-09 02:34:57 -0700376 dlen = rqstp->rq_arg.head[0].iov_len + rqstp->rq_arg.page_len
377 - hdr;
Peter Staubachf34b9562007-05-09 02:34:48 -0700378 /*
379 * Round the length of the data which was specified up to
380 * the next multiple of XDR units and then compare that
381 * against the length which was actually received.
NeilBrownba67a392008-01-11 17:06:52 -0500382 * Note that when RPCSEC/GSS (for example) is used, the
383 * data buffer can be padded so dlen might be larger
384 * than required. It must never be smaller.
Peter Staubachf34b9562007-05-09 02:34:48 -0700385 */
NeilBrownba67a392008-01-11 17:06:52 -0500386 if (dlen < XDR_QUADLEN(len)*4)
Peter Staubachf34b9562007-05-09 02:34:48 -0700387 return 0;
388
389 if (args->count > max_blocksize) {
390 args->count = max_blocksize;
391 len = args->len = max_blocksize;
392 }
NeilBrown3cc03b12006-10-04 02:15:47 -0700393 rqstp->rq_vec[0].iov_base = (void*)p;
394 rqstp->rq_vec[0].iov_len = rqstp->rq_arg.head[0].iov_len - hdr;
Peter Staubachf34b9562007-05-09 02:34:48 -0700395 v = 0;
NeilBrown3cc03b12006-10-04 02:15:47 -0700396 while (len > rqstp->rq_vec[v].iov_len) {
397 len -= rqstp->rq_vec[v].iov_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398 v++;
NeilBrown3cc03b12006-10-04 02:15:47 -0700399 rqstp->rq_vec[v].iov_base = page_address(rqstp->rq_pages[v]);
400 rqstp->rq_vec[v].iov_len = PAGE_SIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401 }
NeilBrown3cc03b12006-10-04 02:15:47 -0700402 rqstp->rq_vec[v].iov_len = len;
Peter Staubachf34b9562007-05-09 02:34:48 -0700403 args->vlen = v + 1;
404 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405}
406
407int
Al Viro91f07162006-10-19 23:28:57 -0700408nfs3svc_decode_createargs(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409 struct nfsd3_createargs *args)
410{
411 if (!(p = decode_fh(p, &args->fh))
412 || !(p = decode_filename(p, &args->name, &args->len)))
413 return 0;
414
415 switch (args->createmode = ntohl(*p++)) {
416 case NFS3_CREATE_UNCHECKED:
417 case NFS3_CREATE_GUARDED:
NeilBrown072f62e2007-05-09 02:34:57 -0700418 p = decode_sattr3(p, &args->attrs);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419 break;
420 case NFS3_CREATE_EXCLUSIVE:
421 args->verf = p;
422 p += 2;
423 break;
424 default:
425 return 0;
426 }
427
428 return xdr_argsize_check(rqstp, p);
429}
430int
Al Viro91f07162006-10-19 23:28:57 -0700431nfs3svc_decode_mkdirargs(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432 struct nfsd3_createargs *args)
433{
NeilBrown072f62e2007-05-09 02:34:57 -0700434 if (!(p = decode_fh(p, &args->fh)) ||
435 !(p = decode_filename(p, &args->name, &args->len)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436 return 0;
NeilBrown072f62e2007-05-09 02:34:57 -0700437 p = decode_sattr3(p, &args->attrs);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438
439 return xdr_argsize_check(rqstp, p);
440}
441
442int
Al Viro91f07162006-10-19 23:28:57 -0700443nfs3svc_decode_symlinkargs(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 struct nfsd3_symlinkargs *args)
445{
Chuck Levera628f662007-11-01 16:57:20 -0400446 unsigned int len, avail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447 char *old, *new;
448 struct kvec *vec;
449
NeilBrown072f62e2007-05-09 02:34:57 -0700450 if (!(p = decode_fh(p, &args->ffh)) ||
451 !(p = decode_filename(p, &args->fname, &args->flen))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452 )
453 return 0;
NeilBrown072f62e2007-05-09 02:34:57 -0700454 p = decode_sattr3(p, &args->attrs);
455
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456 /* now decode the pathname, which might be larger than the first page.
457 * As we have to check for nul's anyway, we copy it into a new page
458 * This page appears in the rq_res.pages list, but as pages_len is always
459 * 0, it won't get in the way
460 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461 len = ntohl(*p++);
462 if (len == 0 || len > NFS3_MAXPATHLEN || len >= PAGE_SIZE)
463 return 0;
NeilBrown44524352006-10-04 02:15:46 -0700464 args->tname = new =
465 page_address(rqstp->rq_respages[rqstp->rq_resused++]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466 args->tlen = len;
467 /* first copy and check from the first page */
468 old = (char*)p;
469 vec = &rqstp->rq_arg.head[0];
470 avail = vec->iov_len - (old - (char*)vec->iov_base);
471 while (len && avail && *old) {
472 *new++ = *old++;
473 len--;
474 avail--;
475 }
476 /* now copy next page if there is one */
477 if (len && !avail && rqstp->rq_arg.page_len) {
478 avail = rqstp->rq_arg.page_len;
Chuck Levera628f662007-11-01 16:57:20 -0400479 if (avail > PAGE_SIZE)
480 avail = PAGE_SIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481 old = page_address(rqstp->rq_arg.pages[0]);
482 }
483 while (len && avail && *old) {
484 *new++ = *old++;
485 len--;
486 avail--;
487 }
488 *new = '\0';
489 if (len)
490 return 0;
491
492 return 1;
493}
494
495int
Al Viro91f07162006-10-19 23:28:57 -0700496nfs3svc_decode_mknodargs(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497 struct nfsd3_mknodargs *args)
498{
499 if (!(p = decode_fh(p, &args->fh))
500 || !(p = decode_filename(p, &args->name, &args->len)))
501 return 0;
502
503 args->ftype = ntohl(*p++);
504
505 if (args->ftype == NF3BLK || args->ftype == NF3CHR
NeilBrown072f62e2007-05-09 02:34:57 -0700506 || args->ftype == NF3SOCK || args->ftype == NF3FIFO)
507 p = decode_sattr3(p, &args->attrs);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508
509 if (args->ftype == NF3BLK || args->ftype == NF3CHR) {
510 args->major = ntohl(*p++);
511 args->minor = ntohl(*p++);
512 }
513
514 return xdr_argsize_check(rqstp, p);
515}
516
517int
Al Viro91f07162006-10-19 23:28:57 -0700518nfs3svc_decode_renameargs(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519 struct nfsd3_renameargs *args)
520{
521 if (!(p = decode_fh(p, &args->ffh))
522 || !(p = decode_filename(p, &args->fname, &args->flen))
523 || !(p = decode_fh(p, &args->tfh))
524 || !(p = decode_filename(p, &args->tname, &args->tlen)))
525 return 0;
526
527 return xdr_argsize_check(rqstp, p);
528}
529
530int
Al Viro91f07162006-10-19 23:28:57 -0700531nfs3svc_decode_readlinkargs(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532 struct nfsd3_readlinkargs *args)
533{
534 if (!(p = decode_fh(p, &args->fh)))
535 return 0;
NeilBrown44524352006-10-04 02:15:46 -0700536 args->buffer =
537 page_address(rqstp->rq_respages[rqstp->rq_resused++]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538
539 return xdr_argsize_check(rqstp, p);
540}
541
542int
Al Viro91f07162006-10-19 23:28:57 -0700543nfs3svc_decode_linkargs(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544 struct nfsd3_linkargs *args)
545{
546 if (!(p = decode_fh(p, &args->ffh))
547 || !(p = decode_fh(p, &args->tfh))
548 || !(p = decode_filename(p, &args->tname, &args->tlen)))
549 return 0;
550
551 return xdr_argsize_check(rqstp, p);
552}
553
554int
Al Viro91f07162006-10-19 23:28:57 -0700555nfs3svc_decode_readdirargs(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556 struct nfsd3_readdirargs *args)
557{
558 if (!(p = decode_fh(p, &args->fh)))
559 return 0;
560 p = xdr_decode_hyper(p, &args->cookie);
561 args->verf = p; p += 2;
562 args->dircount = ~0;
563 args->count = ntohl(*p++);
564
565 if (args->count > PAGE_SIZE)
566 args->count = PAGE_SIZE;
567
NeilBrown44524352006-10-04 02:15:46 -0700568 args->buffer =
569 page_address(rqstp->rq_respages[rqstp->rq_resused++]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570
571 return xdr_argsize_check(rqstp, p);
572}
573
574int
Al Viro91f07162006-10-19 23:28:57 -0700575nfs3svc_decode_readdirplusargs(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576 struct nfsd3_readdirargs *args)
577{
578 int len, pn;
Greg Banks7adae482006-10-04 02:15:47 -0700579 u32 max_blocksize = svc_max_payload(rqstp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580
581 if (!(p = decode_fh(p, &args->fh)))
582 return 0;
583 p = xdr_decode_hyper(p, &args->cookie);
584 args->verf = p; p += 2;
585 args->dircount = ntohl(*p++);
586 args->count = ntohl(*p++);
587
Greg Banks7adae482006-10-04 02:15:47 -0700588 len = (args->count > max_blocksize) ? max_blocksize :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589 args->count;
590 args->count = len;
591
592 while (len > 0) {
NeilBrown44524352006-10-04 02:15:46 -0700593 pn = rqstp->rq_resused++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594 if (!args->buffer)
595 args->buffer = page_address(rqstp->rq_respages[pn]);
596 len -= PAGE_SIZE;
597 }
598
599 return xdr_argsize_check(rqstp, p);
600}
601
602int
Al Viro91f07162006-10-19 23:28:57 -0700603nfs3svc_decode_commitargs(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604 struct nfsd3_commitargs *args)
605{
606 if (!(p = decode_fh(p, &args->fh)))
607 return 0;
608 p = xdr_decode_hyper(p, &args->offset);
609 args->count = ntohl(*p++);
610
611 return xdr_argsize_check(rqstp, p);
612}
613
614/*
615 * XDR encode functions
616 */
617/*
618 * There must be an encoding function for void results so svc_process
619 * will work properly.
620 */
621int
Al Viro91f07162006-10-19 23:28:57 -0700622nfs3svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623{
624 return xdr_ressize_check(rqstp, p);
625}
626
627/* GETATTR */
628int
Al Viro91f07162006-10-19 23:28:57 -0700629nfs3svc_encode_attrstat(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630 struct nfsd3_attrstat *resp)
631{
Peter Staubach40ee5dc2007-08-16 12:10:07 -0400632 if (resp->status == 0) {
633 lease_get_mtime(resp->fh.fh_dentry->d_inode,
634 &resp->stat.mtime);
David Shawa334de22006-01-06 00:19:58 -0800635 p = encode_fattr3(rqstp, p, &resp->fh, &resp->stat);
Peter Staubach40ee5dc2007-08-16 12:10:07 -0400636 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637 return xdr_ressize_check(rqstp, p);
638}
639
640/* SETATTR, REMOVE, RMDIR */
641int
Al Viro91f07162006-10-19 23:28:57 -0700642nfs3svc_encode_wccstat(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643 struct nfsd3_attrstat *resp)
644{
645 p = encode_wcc_data(rqstp, p, &resp->fh);
646 return xdr_ressize_check(rqstp, p);
647}
648
649/* LOOKUP */
650int
Al Viro91f07162006-10-19 23:28:57 -0700651nfs3svc_encode_diropres(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700652 struct nfsd3_diropres *resp)
653{
654 if (resp->status == 0) {
655 p = encode_fh(p, &resp->fh);
656 p = encode_post_op_attr(rqstp, p, &resp->fh);
657 }
658 p = encode_post_op_attr(rqstp, p, &resp->dirfh);
659 return xdr_ressize_check(rqstp, p);
660}
661
662/* ACCESS */
663int
Al Viro91f07162006-10-19 23:28:57 -0700664nfs3svc_encode_accessres(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665 struct nfsd3_accessres *resp)
666{
667 p = encode_post_op_attr(rqstp, p, &resp->fh);
668 if (resp->status == 0)
669 *p++ = htonl(resp->access);
670 return xdr_ressize_check(rqstp, p);
671}
672
673/* READLINK */
674int
Al Viro91f07162006-10-19 23:28:57 -0700675nfs3svc_encode_readlinkres(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676 struct nfsd3_readlinkres *resp)
677{
678 p = encode_post_op_attr(rqstp, p, &resp->fh);
679 if (resp->status == 0) {
680 *p++ = htonl(resp->len);
681 xdr_ressize_check(rqstp, p);
682 rqstp->rq_res.page_len = resp->len;
683 if (resp->len & 3) {
684 /* need to pad the tail */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685 rqstp->rq_res.tail[0].iov_base = p;
686 *p = 0;
687 rqstp->rq_res.tail[0].iov_len = 4 - (resp->len&3);
688 }
689 return 1;
690 } else
691 return xdr_ressize_check(rqstp, p);
692}
693
694/* READ */
695int
Al Viro91f07162006-10-19 23:28:57 -0700696nfs3svc_encode_readres(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700697 struct nfsd3_readres *resp)
698{
699 p = encode_post_op_attr(rqstp, p, &resp->fh);
700 if (resp->status == 0) {
701 *p++ = htonl(resp->count);
702 *p++ = htonl(resp->eof);
703 *p++ = htonl(resp->count); /* xdr opaque count */
704 xdr_ressize_check(rqstp, p);
705 /* now update rqstp->rq_res to reflect data aswell */
706 rqstp->rq_res.page_len = resp->count;
707 if (resp->count & 3) {
708 /* need to pad the tail */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700709 rqstp->rq_res.tail[0].iov_base = p;
710 *p = 0;
711 rqstp->rq_res.tail[0].iov_len = 4 - (resp->count & 3);
712 }
713 return 1;
714 } else
715 return xdr_ressize_check(rqstp, p);
716}
717
718/* WRITE */
719int
Al Viro91f07162006-10-19 23:28:57 -0700720nfs3svc_encode_writeres(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721 struct nfsd3_writeres *resp)
722{
723 p = encode_wcc_data(rqstp, p, &resp->fh);
724 if (resp->status == 0) {
725 *p++ = htonl(resp->count);
726 *p++ = htonl(resp->committed);
727 *p++ = htonl(nfssvc_boot.tv_sec);
728 *p++ = htonl(nfssvc_boot.tv_usec);
729 }
730 return xdr_ressize_check(rqstp, p);
731}
732
733/* CREATE, MKDIR, SYMLINK, MKNOD */
734int
Al Viro91f07162006-10-19 23:28:57 -0700735nfs3svc_encode_createres(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700736 struct nfsd3_diropres *resp)
737{
738 if (resp->status == 0) {
739 *p++ = xdr_one;
740 p = encode_fh(p, &resp->fh);
741 p = encode_post_op_attr(rqstp, p, &resp->fh);
742 }
743 p = encode_wcc_data(rqstp, p, &resp->dirfh);
744 return xdr_ressize_check(rqstp, p);
745}
746
747/* RENAME */
748int
Al Viro91f07162006-10-19 23:28:57 -0700749nfs3svc_encode_renameres(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700750 struct nfsd3_renameres *resp)
751{
752 p = encode_wcc_data(rqstp, p, &resp->ffh);
753 p = encode_wcc_data(rqstp, p, &resp->tfh);
754 return xdr_ressize_check(rqstp, p);
755}
756
757/* LINK */
758int
Al Viro91f07162006-10-19 23:28:57 -0700759nfs3svc_encode_linkres(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760 struct nfsd3_linkres *resp)
761{
762 p = encode_post_op_attr(rqstp, p, &resp->fh);
763 p = encode_wcc_data(rqstp, p, &resp->tfh);
764 return xdr_ressize_check(rqstp, p);
765}
766
767/* READDIR */
768int
Al Viro91f07162006-10-19 23:28:57 -0700769nfs3svc_encode_readdirres(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770 struct nfsd3_readdirres *resp)
771{
772 p = encode_post_op_attr(rqstp, p, &resp->fh);
773
774 if (resp->status == 0) {
775 /* stupid readdir cookie */
776 memcpy(p, resp->verf, 8); p += 2;
777 xdr_ressize_check(rqstp, p);
778 if (rqstp->rq_res.head[0].iov_len + (2<<2) > PAGE_SIZE)
779 return 1; /*No room for trailer */
780 rqstp->rq_res.page_len = (resp->count) << 2;
781
782 /* add the 'tail' to the end of the 'head' page - page 0. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700783 rqstp->rq_res.tail[0].iov_base = p;
784 *p++ = 0; /* no more entries */
785 *p++ = htonl(resp->common.err == nfserr_eof);
786 rqstp->rq_res.tail[0].iov_len = 2<<2;
787 return 1;
788 } else
789 return xdr_ressize_check(rqstp, p);
790}
791
Adrian Bunk3ee6f612006-12-06 20:40:23 -0800792static __be32 *
Al Viro91f07162006-10-19 23:28:57 -0700793encode_entry_baggage(struct nfsd3_readdirres *cd, __be32 *p, const char *name,
Peter Staubach40ee5dc2007-08-16 12:10:07 -0400794 int namlen, u64 ino)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700795{
796 *p++ = xdr_one; /* mark entry present */
797 p = xdr_encode_hyper(p, ino); /* file id */
798 p = xdr_encode_array(p, name, namlen);/* name length & name */
799
800 cd->offset = p; /* remember pointer */
801 p = xdr_encode_hyper(p, NFS_OFFSET_MAX);/* offset of next entry */
802
803 return p;
804}
805
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806static int
807compose_entry_fh(struct nfsd3_readdirres *cd, struct svc_fh *fhp,
808 const char *name, int namlen)
809{
810 struct svc_export *exp;
811 struct dentry *dparent, *dchild;
812 int rv = 0;
813
814 dparent = cd->fh.fh_dentry;
815 exp = cd->fh.fh_export;
816
Linus Torvalds1da177e2005-04-16 15:20:36 -0700817 if (isdotent(name, namlen)) {
818 if (namlen == 2) {
819 dchild = dget_parent(dparent);
820 if (dchild == dparent) {
821 /* filesystem root - cannot return filehandle for ".." */
822 dput(dchild);
J. Bruce Fields8177e6d2009-09-04 14:13:09 -0400823 return -ENOENT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824 }
825 } else
826 dchild = dget(dparent);
827 } else
828 dchild = lookup_one_len(name, dparent, namlen);
829 if (IS_ERR(dchild))
J. Bruce Fields8177e6d2009-09-04 14:13:09 -0400830 return -ENOENT;
831 rv = -ENOENT;
832 if (d_mountpoint(dchild))
833 goto out;
834 rv = fh_compose(fhp, exp, dchild, &cd->fh);
835 if (rv)
836 goto out;
837 if (!dchild->d_inode)
838 goto out;
839 rv = 0;
840out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700841 dput(dchild);
842 return rv;
843}
844
J. Bruce Fields8177e6d2009-09-04 14:13:09 -0400845__be32 *encode_entryplus_baggage(struct nfsd3_readdirres *cd, __be32 *p, const char *name, int namlen)
846{
847 struct svc_fh fh;
848 int err;
849
J. Bruce Fieldsaed100f2009-09-04 14:40:36 -0400850 fh_init(&fh, NFS3_FHSIZE);
J. Bruce Fields8177e6d2009-09-04 14:13:09 -0400851 err = compose_entry_fh(cd, &fh, name, namlen);
852 if (err) {
853 *p++ = 0;
854 *p++ = 0;
J. Bruce Fieldsaed100f2009-09-04 14:40:36 -0400855 goto out;
J. Bruce Fields8177e6d2009-09-04 14:13:09 -0400856 }
857 p = encode_post_op_attr(cd->rqstp, p, &fh);
858 *p++ = xdr_one; /* yes, a file handle follows */
859 p = encode_fh(p, &fh);
J. Bruce Fieldsaed100f2009-09-04 14:40:36 -0400860out:
J. Bruce Fields8177e6d2009-09-04 14:13:09 -0400861 fh_put(&fh);
862 return p;
863}
864
Linus Torvalds1da177e2005-04-16 15:20:36 -0700865/*
866 * Encode a directory entry. This one works for both normal readdir
867 * and readdirplus.
868 * The normal readdir reply requires 2 (fileid) + 1 (stringlen)
869 * + string + 2 (cookie) + 1 (next) words, i.e. 6 + strlen.
870 *
871 * The readdirplus baggage is 1+21 words for post_op_attr, plus the
872 * file handle.
873 */
874
875#define NFS3_ENTRY_BAGGAGE (2 + 1 + 2 + 1)
876#define NFS3_ENTRYPLUS_BAGGAGE (1 + 21 + 1 + (NFS3_FHSIZE >> 2))
877static int
NeilBrown598b9a52007-03-26 21:32:08 -0800878encode_entry(struct readdir_cd *ccd, const char *name, int namlen,
Peter Staubach40ee5dc2007-08-16 12:10:07 -0400879 loff_t offset, u64 ino, unsigned int d_type, int plus)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880{
881 struct nfsd3_readdirres *cd = container_of(ccd, struct nfsd3_readdirres,
882 common);
Al Viro91f07162006-10-19 23:28:57 -0700883 __be32 *p = cd->buffer;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700884 caddr_t curr_page_addr = NULL;
885 int pn; /* current page number */
886 int slen; /* string (name) length */
887 int elen; /* estimated entry length in words */
888 int num_entry_words = 0; /* actual number of words */
889
890 if (cd->offset) {
891 u64 offset64 = offset;
892
893 if (unlikely(cd->offset1)) {
894 /* we ended up with offset on a page boundary */
895 *cd->offset = htonl(offset64 >> 32);
896 *cd->offset1 = htonl(offset64 & 0xffffffff);
897 cd->offset1 = NULL;
898 } else {
NeilBrown598b9a52007-03-26 21:32:08 -0800899 xdr_encode_hyper(cd->offset, offset64);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700900 }
901 }
902
903 /*
904 dprintk("encode_entry(%.*s @%ld%s)\n",
905 namlen, name, (long) offset, plus? " plus" : "");
906 */
907
908 /* truncate filename if too long */
909 if (namlen > NFS3_MAXNAMLEN)
910 namlen = NFS3_MAXNAMLEN;
911
912 slen = XDR_QUADLEN(namlen);
913 elen = slen + NFS3_ENTRY_BAGGAGE
914 + (plus? NFS3_ENTRYPLUS_BAGGAGE : 0);
915
916 if (cd->buflen < elen) {
917 cd->common.err = nfserr_toosmall;
918 return -EINVAL;
919 }
920
921 /* determine which page in rq_respages[] we are currently filling */
922 for (pn=1; pn < cd->rqstp->rq_resused; pn++) {
923 curr_page_addr = page_address(cd->rqstp->rq_respages[pn]);
924
925 if (((caddr_t)cd->buffer >= curr_page_addr) &&
926 ((caddr_t)cd->buffer < curr_page_addr + PAGE_SIZE))
927 break;
928 }
929
930 if ((caddr_t)(cd->buffer + elen) < (curr_page_addr + PAGE_SIZE)) {
931 /* encode entry in current page */
932
933 p = encode_entry_baggage(cd, p, name, namlen, ino);
934
J. Bruce Fields8177e6d2009-09-04 14:13:09 -0400935 if (plus)
936 p = encode_entryplus_baggage(cd, p, name, namlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700937 num_entry_words = p - cd->buffer;
938 } else if (cd->rqstp->rq_respages[pn+1] != NULL) {
939 /* temporarily encode entry into next page, then move back to
940 * current and next page in rq_respages[] */
Al Viro91f07162006-10-19 23:28:57 -0700941 __be32 *p1, *tmp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700942 int len1, len2;
943
944 /* grab next page for temporary storage of entry */
945 p1 = tmp = page_address(cd->rqstp->rq_respages[pn+1]);
946
947 p1 = encode_entry_baggage(cd, p1, name, namlen, ino);
948
J. Bruce Fields8177e6d2009-09-04 14:13:09 -0400949 if (plus)
Petr Vandrovec479c2552009-11-14 10:47:07 +0100950 p1 = encode_entryplus_baggage(cd, p1, name, namlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700951
952 /* determine entry word length and lengths to go in pages */
953 num_entry_words = p1 - tmp;
954 len1 = curr_page_addr + PAGE_SIZE - (caddr_t)cd->buffer;
955 if ((num_entry_words << 2) < len1) {
956 /* the actual number of words in the entry is less
957 * than elen and can still fit in the current page
958 */
959 memmove(p, tmp, num_entry_words << 2);
960 p += num_entry_words;
961
962 /* update offset */
963 cd->offset = cd->buffer + (cd->offset - tmp);
964 } else {
965 unsigned int offset_r = (cd->offset - tmp) << 2;
966
967 /* update pointer to offset location.
968 * This is a 64bit quantity, so we need to
969 * deal with 3 cases:
970 * - entirely in first page
971 * - entirely in second page
972 * - 4 bytes in each page
973 */
974 if (offset_r + 8 <= len1) {
975 cd->offset = p + (cd->offset - tmp);
976 } else if (offset_r >= len1) {
977 cd->offset -= len1 >> 2;
978 } else {
979 /* sitting on the fence */
980 BUG_ON(offset_r != len1 - 4);
981 cd->offset = p + (cd->offset - tmp);
982 cd->offset1 = tmp;
983 }
984
985 len2 = (num_entry_words << 2) - len1;
986
987 /* move from temp page to current and next pages */
988 memmove(p, tmp, len1);
989 memmove(tmp, (caddr_t)tmp+len1, len2);
990
991 p = tmp + (len2 >> 2);
992 }
993 }
994 else {
995 cd->common.err = nfserr_toosmall;
996 return -EINVAL;
997 }
998
999 cd->buflen -= num_entry_words;
1000 cd->buffer = p;
1001 cd->common.err = nfs_ok;
1002 return 0;
1003
1004}
1005
1006int
NeilBrowna0ad13e2007-01-26 00:57:10 -08001007nfs3svc_encode_entry(void *cd, const char *name,
1008 int namlen, loff_t offset, u64 ino, unsigned int d_type)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001009{
1010 return encode_entry(cd, name, namlen, offset, ino, d_type, 0);
1011}
1012
1013int
NeilBrowna0ad13e2007-01-26 00:57:10 -08001014nfs3svc_encode_entry_plus(void *cd, const char *name,
1015 int namlen, loff_t offset, u64 ino,
1016 unsigned int d_type)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001017{
1018 return encode_entry(cd, name, namlen, offset, ino, d_type, 1);
1019}
1020
1021/* FSSTAT */
1022int
Al Viro91f07162006-10-19 23:28:57 -07001023nfs3svc_encode_fsstatres(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001024 struct nfsd3_fsstatres *resp)
1025{
1026 struct kstatfs *s = &resp->stats;
1027 u64 bs = s->f_bsize;
1028
1029 *p++ = xdr_zero; /* no post_op_attr */
1030
1031 if (resp->status == 0) {
1032 p = xdr_encode_hyper(p, bs * s->f_blocks); /* total bytes */
1033 p = xdr_encode_hyper(p, bs * s->f_bfree); /* free bytes */
1034 p = xdr_encode_hyper(p, bs * s->f_bavail); /* user available bytes */
1035 p = xdr_encode_hyper(p, s->f_files); /* total inodes */
1036 p = xdr_encode_hyper(p, s->f_ffree); /* free inodes */
1037 p = xdr_encode_hyper(p, s->f_ffree); /* user available inodes */
1038 *p++ = htonl(resp->invarsec); /* mean unchanged time */
1039 }
1040 return xdr_ressize_check(rqstp, p);
1041}
1042
1043/* FSINFO */
1044int
Al Viro91f07162006-10-19 23:28:57 -07001045nfs3svc_encode_fsinfores(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001046 struct nfsd3_fsinfores *resp)
1047{
1048 *p++ = xdr_zero; /* no post_op_attr */
1049
1050 if (resp->status == 0) {
1051 *p++ = htonl(resp->f_rtmax);
1052 *p++ = htonl(resp->f_rtpref);
1053 *p++ = htonl(resp->f_rtmult);
1054 *p++ = htonl(resp->f_wtmax);
1055 *p++ = htonl(resp->f_wtpref);
1056 *p++ = htonl(resp->f_wtmult);
1057 *p++ = htonl(resp->f_dtpref);
1058 p = xdr_encode_hyper(p, resp->f_maxfilesize);
1059 *p++ = xdr_one;
1060 *p++ = xdr_zero;
1061 *p++ = htonl(resp->f_properties);
1062 }
1063
1064 return xdr_ressize_check(rqstp, p);
1065}
1066
1067/* PATHCONF */
1068int
Al Viro91f07162006-10-19 23:28:57 -07001069nfs3svc_encode_pathconfres(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070 struct nfsd3_pathconfres *resp)
1071{
1072 *p++ = xdr_zero; /* no post_op_attr */
1073
1074 if (resp->status == 0) {
1075 *p++ = htonl(resp->p_link_max);
1076 *p++ = htonl(resp->p_name_max);
1077 *p++ = htonl(resp->p_no_trunc);
1078 *p++ = htonl(resp->p_chown_restricted);
1079 *p++ = htonl(resp->p_case_insensitive);
1080 *p++ = htonl(resp->p_case_preserving);
1081 }
1082
1083 return xdr_ressize_check(rqstp, p);
1084}
1085
1086/* COMMIT */
1087int
Al Viro91f07162006-10-19 23:28:57 -07001088nfs3svc_encode_commitres(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001089 struct nfsd3_commitres *resp)
1090{
1091 p = encode_wcc_data(rqstp, p, &resp->fh);
1092 /* Write verifier */
1093 if (resp->status == 0) {
1094 *p++ = htonl(nfssvc_boot.tv_sec);
1095 *p++ = htonl(nfssvc_boot.tv_usec);
1096 }
1097 return xdr_ressize_check(rqstp, p);
1098}
1099
1100/*
1101 * XDR release functions
1102 */
1103int
Al Viro91f07162006-10-19 23:28:57 -07001104nfs3svc_release_fhandle(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001105 struct nfsd3_attrstat *resp)
1106{
1107 fh_put(&resp->fh);
1108 return 1;
1109}
1110
1111int
Al Viro91f07162006-10-19 23:28:57 -07001112nfs3svc_release_fhandle2(struct svc_rqst *rqstp, __be32 *p,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113 struct nfsd3_fhandle_pair *resp)
1114{
1115 fh_put(&resp->fh1);
1116 fh_put(&resp->fh2);
1117 return 1;
1118}