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Commit | Line | Data |
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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * 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 | ||
1da177e4 | 9 | #include <linux/namei.h> |
b9c0ef85 | 10 | #include <linux/sunrpc/svc_xprt.h> |
9a74af21 | 11 | #include "xdr3.h" |
2e8138a2 | 12 | #include "auth.h" |
b9c0ef85 | 13 | #include "netns.h" |
3dadecce | 14 | #include "vfs.h" |
1da177e4 LT |
15 | |
16 | #define NFSDDBG_FACILITY NFSDDBG_XDR | |
17 | ||
1da177e4 LT |
18 | |
19 | /* | |
20 | * Mapping of S_IF* types to NFS file types | |
21 | */ | |
22 | static u32 nfs3_ftypes[] = { | |
23 | NF3NON, NF3FIFO, NF3CHR, NF3BAD, | |
24 | NF3DIR, NF3BAD, NF3BLK, NF3BAD, | |
25 | NF3REG, NF3BAD, NF3LNK, NF3BAD, | |
26 | NF3SOCK, NF3BAD, NF3LNK, NF3BAD, | |
27 | }; | |
28 | ||
29 | /* | |
30 | * XDR functions for basic NFS types | |
31 | */ | |
3ee6f61c | 32 | static __be32 * |
91f07168 | 33 | encode_time3(__be32 *p, struct timespec *time) |
1da177e4 LT |
34 | { |
35 | *p++ = htonl((u32) time->tv_sec); *p++ = htonl(time->tv_nsec); | |
36 | return p; | |
37 | } | |
38 | ||
3ee6f61c | 39 | static __be32 * |
91f07168 | 40 | decode_time3(__be32 *p, struct timespec *time) |
1da177e4 LT |
41 | { |
42 | time->tv_sec = ntohl(*p++); | |
43 | time->tv_nsec = ntohl(*p++); | |
44 | return p; | |
45 | } | |
46 | ||
3ee6f61c | 47 | static __be32 * |
91f07168 | 48 | decode_fh(__be32 *p, struct svc_fh *fhp) |
1da177e4 LT |
49 | { |
50 | unsigned int size; | |
51 | fh_init(fhp, NFS3_FHSIZE); | |
52 | size = ntohl(*p++); | |
53 | if (size > NFS3_FHSIZE) | |
54 | return NULL; | |
55 | ||
56 | memcpy(&fhp->fh_handle.fh_base, p, size); | |
57 | fhp->fh_handle.fh_size = size; | |
58 | return p + XDR_QUADLEN(size); | |
59 | } | |
60 | ||
a257cdd0 | 61 | /* Helper function for NFSv3 ACL code */ |
91f07168 | 62 | __be32 *nfs3svc_decode_fh(__be32 *p, struct svc_fh *fhp) |
a257cdd0 AG |
63 | { |
64 | return decode_fh(p, fhp); | |
65 | } | |
66 | ||
3ee6f61c | 67 | static __be32 * |
91f07168 | 68 | encode_fh(__be32 *p, struct svc_fh *fhp) |
1da177e4 LT |
69 | { |
70 | unsigned int size = fhp->fh_handle.fh_size; | |
71 | *p++ = htonl(size); | |
72 | if (size) p[XDR_QUADLEN(size)-1]=0; | |
73 | memcpy(p, &fhp->fh_handle.fh_base, size); | |
74 | return p + XDR_QUADLEN(size); | |
75 | } | |
76 | ||
77 | /* | |
78 | * Decode a file name and make sure that the path contains | |
79 | * no slashes or null bytes. | |
80 | */ | |
3ee6f61c | 81 | static __be32 * |
ee1a95b3 | 82 | decode_filename(__be32 *p, char **namp, unsigned int *lenp) |
1da177e4 LT |
83 | { |
84 | char *name; | |
ee1a95b3 | 85 | unsigned int i; |
1da177e4 LT |
86 | |
87 | if ((p = xdr_decode_string_inplace(p, namp, lenp, NFS3_MAXNAMLEN)) != NULL) { | |
88 | for (i = 0, name = *namp; i < *lenp; i++, name++) { | |
89 | if (*name == '\0' || *name == '/') | |
90 | return NULL; | |
91 | } | |
92 | } | |
93 | ||
94 | return p; | |
95 | } | |
96 | ||
3ee6f61c | 97 | static __be32 * |
91f07168 | 98 | decode_sattr3(__be32 *p, struct iattr *iap) |
1da177e4 LT |
99 | { |
100 | u32 tmp; | |
101 | ||
102 | iap->ia_valid = 0; | |
103 | ||
104 | if (*p++) { | |
105 | iap->ia_valid |= ATTR_MODE; | |
106 | iap->ia_mode = ntohl(*p++); | |
107 | } | |
108 | if (*p++) { | |
458878a7 EB |
109 | iap->ia_uid = make_kuid(&init_user_ns, ntohl(*p++)); |
110 | if (uid_valid(iap->ia_uid)) | |
111 | iap->ia_valid |= ATTR_UID; | |
1da177e4 LT |
112 | } |
113 | if (*p++) { | |
458878a7 EB |
114 | iap->ia_gid = make_kgid(&init_user_ns, ntohl(*p++)); |
115 | if (gid_valid(iap->ia_gid)) | |
116 | iap->ia_valid |= ATTR_GID; | |
1da177e4 LT |
117 | } |
118 | if (*p++) { | |
119 | u64 newsize; | |
120 | ||
121 | iap->ia_valid |= ATTR_SIZE; | |
122 | p = xdr_decode_hyper(p, &newsize); | |
3c7aa15d | 123 | iap->ia_size = min_t(u64, newsize, NFS_OFFSET_MAX); |
1da177e4 LT |
124 | } |
125 | if ((tmp = ntohl(*p++)) == 1) { /* set to server time */ | |
126 | iap->ia_valid |= ATTR_ATIME; | |
127 | } else if (tmp == 2) { /* set to client time */ | |
128 | iap->ia_valid |= ATTR_ATIME | ATTR_ATIME_SET; | |
129 | iap->ia_atime.tv_sec = ntohl(*p++); | |
130 | iap->ia_atime.tv_nsec = ntohl(*p++); | |
131 | } | |
132 | if ((tmp = ntohl(*p++)) == 1) { /* set to server time */ | |
133 | iap->ia_valid |= ATTR_MTIME; | |
134 | } else if (tmp == 2) { /* set to client time */ | |
135 | iap->ia_valid |= ATTR_MTIME | ATTR_MTIME_SET; | |
136 | iap->ia_mtime.tv_sec = ntohl(*p++); | |
137 | iap->ia_mtime.tv_nsec = ntohl(*p++); | |
138 | } | |
139 | return p; | |
140 | } | |
141 | ||
af6a4e28 N |
142 | static __be32 *encode_fsid(__be32 *p, struct svc_fh *fhp) |
143 | { | |
144 | u64 f; | |
145 | switch(fsid_source(fhp)) { | |
146 | default: | |
147 | case FSIDSOURCE_DEV: | |
148 | p = xdr_encode_hyper(p, (u64)huge_encode_dev | |
fc64005c | 149 | (fhp->fh_dentry->d_sb->s_dev)); |
af6a4e28 N |
150 | break; |
151 | case FSIDSOURCE_FSID: | |
152 | p = xdr_encode_hyper(p, (u64) fhp->fh_export->ex_fsid); | |
153 | break; | |
154 | case FSIDSOURCE_UUID: | |
155 | f = ((u64*)fhp->fh_export->ex_uuid)[0]; | |
156 | f ^= ((u64*)fhp->fh_export->ex_uuid)[1]; | |
157 | p = xdr_encode_hyper(p, f); | |
158 | break; | |
159 | } | |
160 | return p; | |
161 | } | |
162 | ||
3ee6f61c | 163 | static __be32 * |
91f07168 | 164 | encode_fattr3(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp, |
a334de28 | 165 | struct kstat *stat) |
1da177e4 | 166 | { |
a334de28 | 167 | *p++ = htonl(nfs3_ftypes[(stat->mode & S_IFMT) >> 12]); |
6e14b46b | 168 | *p++ = htonl((u32) (stat->mode & S_IALLUGO)); |
a334de28 | 169 | *p++ = htonl((u32) stat->nlink); |
458878a7 EB |
170 | *p++ = htonl((u32) from_kuid(&init_user_ns, stat->uid)); |
171 | *p++ = htonl((u32) from_kgid(&init_user_ns, stat->gid)); | |
a334de28 | 172 | if (S_ISLNK(stat->mode) && stat->size > NFS3_MAXPATHLEN) { |
1da177e4 LT |
173 | p = xdr_encode_hyper(p, (u64) NFS3_MAXPATHLEN); |
174 | } else { | |
a334de28 | 175 | p = xdr_encode_hyper(p, (u64) stat->size); |
1da177e4 | 176 | } |
a334de28 DS |
177 | p = xdr_encode_hyper(p, ((u64)stat->blocks) << 9); |
178 | *p++ = htonl((u32) MAJOR(stat->rdev)); | |
179 | *p++ = htonl((u32) MINOR(stat->rdev)); | |
af6a4e28 | 180 | p = encode_fsid(p, fhp); |
40ee5dc6 | 181 | p = xdr_encode_hyper(p, stat->ino); |
a334de28 | 182 | p = encode_time3(p, &stat->atime); |
40ee5dc6 | 183 | p = encode_time3(p, &stat->mtime); |
a334de28 | 184 | p = encode_time3(p, &stat->ctime); |
1da177e4 LT |
185 | |
186 | return p; | |
187 | } | |
188 | ||
3ee6f61c | 189 | static __be32 * |
91f07168 | 190 | encode_saved_post_attr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp) |
1da177e4 | 191 | { |
1da177e4 LT |
192 | /* Attributes to follow */ |
193 | *p++ = xdr_one; | |
40ee5dc6 | 194 | return encode_fattr3(rqstp, p, fhp, &fhp->fh_post_attr); |
1da177e4 LT |
195 | } |
196 | ||
197 | /* | |
198 | * Encode post-operation attributes. | |
199 | * The inode may be NULL if the call failed because of a stale file | |
200 | * handle. In this case, no attributes are returned. | |
201 | */ | |
91f07168 AV |
202 | static __be32 * |
203 | encode_post_op_attr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp) | |
1da177e4 LT |
204 | { |
205 | struct dentry *dentry = fhp->fh_dentry; | |
2b0143b5 | 206 | if (dentry && d_really_is_positive(dentry)) { |
3dadecce | 207 | __be32 err; |
a334de28 DS |
208 | struct kstat stat; |
209 | ||
3dadecce | 210 | err = fh_getattr(fhp, &stat); |
a334de28 DS |
211 | if (!err) { |
212 | *p++ = xdr_one; /* attributes follow */ | |
2b0143b5 | 213 | lease_get_mtime(d_inode(dentry), &stat.mtime); |
a334de28 DS |
214 | return encode_fattr3(rqstp, p, fhp, &stat); |
215 | } | |
1da177e4 LT |
216 | } |
217 | *p++ = xdr_zero; | |
218 | return p; | |
219 | } | |
220 | ||
a257cdd0 | 221 | /* Helper for NFSv3 ACLs */ |
91f07168 AV |
222 | __be32 * |
223 | nfs3svc_encode_post_op_attr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp) | |
a257cdd0 AG |
224 | { |
225 | return encode_post_op_attr(rqstp, p, fhp); | |
226 | } | |
227 | ||
1da177e4 LT |
228 | /* |
229 | * Enocde weak cache consistency data | |
230 | */ | |
91f07168 AV |
231 | static __be32 * |
232 | encode_wcc_data(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp) | |
1da177e4 LT |
233 | { |
234 | struct dentry *dentry = fhp->fh_dentry; | |
235 | ||
2b0143b5 | 236 | if (dentry && d_really_is_positive(dentry) && fhp->fh_post_saved) { |
1da177e4 LT |
237 | if (fhp->fh_pre_saved) { |
238 | *p++ = xdr_one; | |
239 | p = xdr_encode_hyper(p, (u64) fhp->fh_pre_size); | |
240 | p = encode_time3(p, &fhp->fh_pre_mtime); | |
241 | p = encode_time3(p, &fhp->fh_pre_ctime); | |
242 | } else { | |
243 | *p++ = xdr_zero; | |
244 | } | |
245 | return encode_saved_post_attr(rqstp, p, fhp); | |
246 | } | |
247 | /* no pre- or post-attrs */ | |
248 | *p++ = xdr_zero; | |
249 | return encode_post_op_attr(rqstp, p, fhp); | |
250 | } | |
251 | ||
40ee5dc6 PS |
252 | /* |
253 | * Fill in the post_op attr for the wcc data | |
254 | */ | |
255 | void fill_post_wcc(struct svc_fh *fhp) | |
256 | { | |
3dadecce | 257 | __be32 err; |
40ee5dc6 PS |
258 | |
259 | if (fhp->fh_post_saved) | |
260 | printk("nfsd: inode locked twice during operation.\n"); | |
261 | ||
3dadecce | 262 | err = fh_getattr(fhp, &fhp->fh_post_attr); |
2b0143b5 | 263 | fhp->fh_post_change = d_inode(fhp->fh_dentry)->i_version; |
c1ac3ffc | 264 | if (err) { |
aaf91ec1 | 265 | fhp->fh_post_saved = false; |
c1ac3ffc | 266 | /* Grab the ctime anyway - set_change_info might use it */ |
2b0143b5 | 267 | fhp->fh_post_attr.ctime = d_inode(fhp->fh_dentry)->i_ctime; |
c1ac3ffc | 268 | } else |
aaf91ec1 | 269 | fhp->fh_post_saved = true; |
40ee5dc6 | 270 | } |
1da177e4 LT |
271 | |
272 | /* | |
273 | * XDR decode functions | |
274 | */ | |
275 | int | |
cc6acc20 | 276 | nfs3svc_decode_fhandle(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 277 | { |
cc6acc20 CH |
278 | struct nfsd_fhandle *args = rqstp->rq_argp; |
279 | ||
d40aa337 BT |
280 | p = decode_fh(p, &args->fh); |
281 | if (!p) | |
1da177e4 LT |
282 | return 0; |
283 | return xdr_argsize_check(rqstp, p); | |
284 | } | |
285 | ||
286 | int | |
cc6acc20 | 287 | nfs3svc_decode_sattrargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 288 | { |
cc6acc20 CH |
289 | struct nfsd3_sattrargs *args = rqstp->rq_argp; |
290 | ||
d40aa337 BT |
291 | p = decode_fh(p, &args->fh); |
292 | if (!p) | |
1da177e4 | 293 | return 0; |
072f62ed | 294 | p = decode_sattr3(p, &args->attrs); |
1da177e4 LT |
295 | |
296 | if ((args->check_guard = ntohl(*p++)) != 0) { | |
297 | struct timespec time; | |
298 | p = decode_time3(p, &time); | |
299 | args->guardtime = time.tv_sec; | |
300 | } | |
301 | ||
302 | return xdr_argsize_check(rqstp, p); | |
303 | } | |
304 | ||
305 | int | |
cc6acc20 | 306 | nfs3svc_decode_diropargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 307 | { |
cc6acc20 CH |
308 | struct nfsd3_diropargs *args = rqstp->rq_argp; |
309 | ||
1da177e4 LT |
310 | if (!(p = decode_fh(p, &args->fh)) |
311 | || !(p = decode_filename(p, &args->name, &args->len))) | |
312 | return 0; | |
313 | ||
314 | return xdr_argsize_check(rqstp, p); | |
315 | } | |
316 | ||
317 | int | |
cc6acc20 | 318 | nfs3svc_decode_accessargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 319 | { |
cc6acc20 CH |
320 | struct nfsd3_accessargs *args = rqstp->rq_argp; |
321 | ||
d40aa337 BT |
322 | p = decode_fh(p, &args->fh); |
323 | if (!p) | |
1da177e4 LT |
324 | return 0; |
325 | args->access = ntohl(*p++); | |
326 | ||
327 | return xdr_argsize_check(rqstp, p); | |
328 | } | |
329 | ||
330 | int | |
cc6acc20 | 331 | nfs3svc_decode_readargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 332 | { |
cc6acc20 | 333 | struct nfsd3_readargs *args = rqstp->rq_argp; |
1da177e4 | 334 | unsigned int len; |
afc59400 | 335 | int v; |
7adae489 | 336 | u32 max_blocksize = svc_max_payload(rqstp); |
1da177e4 | 337 | |
d40aa337 BT |
338 | p = decode_fh(p, &args->fh); |
339 | if (!p) | |
1da177e4 | 340 | return 0; |
072f62ed | 341 | p = xdr_decode_hyper(p, &args->offset); |
51f56777 | 342 | |
9512a16b | 343 | args->count = ntohl(*p++); |
3c7aa15d | 344 | len = min(args->count, max_blocksize); |
1da177e4 LT |
345 | |
346 | /* set up the kvec */ | |
347 | v=0; | |
348 | while (len > 0) { | |
afc59400 BF |
349 | struct page *p = *(rqstp->rq_next_page++); |
350 | ||
351 | rqstp->rq_vec[v].iov_base = page_address(p); | |
3c7aa15d | 352 | rqstp->rq_vec[v].iov_len = min_t(unsigned int, len, PAGE_SIZE); |
3cc03b16 | 353 | len -= rqstp->rq_vec[v].iov_len; |
1da177e4 LT |
354 | v++; |
355 | } | |
356 | args->vlen = v; | |
9512a16b | 357 | return xdr_argsize_check(rqstp, p); |
1da177e4 LT |
358 | } |
359 | ||
360 | int | |
cc6acc20 | 361 | nfs3svc_decode_writeargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 362 | { |
cc6acc20 | 363 | struct nfsd3_writeargs *args = rqstp->rq_argp; |
f34b9568 | 364 | unsigned int len, v, hdr, dlen; |
7adae489 | 365 | u32 max_blocksize = svc_max_payload(rqstp); |
db44bac4 BF |
366 | struct kvec *head = rqstp->rq_arg.head; |
367 | struct kvec *tail = rqstp->rq_arg.tail; | |
1da177e4 | 368 | |
d40aa337 BT |
369 | p = decode_fh(p, &args->fh); |
370 | if (!p) | |
1da177e4 | 371 | return 0; |
072f62ed | 372 | p = xdr_decode_hyper(p, &args->offset); |
1da177e4 LT |
373 | |
374 | args->count = ntohl(*p++); | |
375 | args->stable = ntohl(*p++); | |
376 | len = args->len = ntohl(*p++); | |
13bf9fbf BF |
377 | if ((void *)p > head->iov_base + head->iov_len) |
378 | return 0; | |
f34b9568 PS |
379 | /* |
380 | * The count must equal the amount of data passed. | |
381 | */ | |
382 | if (args->count != args->len) | |
383 | return 0; | |
1da177e4 | 384 | |
f34b9568 PS |
385 | /* |
386 | * Check to make sure that we got the right number of | |
387 | * bytes. | |
f34b9568 | 388 | */ |
db44bac4 BF |
389 | hdr = (void*)p - head->iov_base; |
390 | dlen = head->iov_len + rqstp->rq_arg.page_len + tail->iov_len - hdr; | |
f34b9568 PS |
391 | /* |
392 | * Round the length of the data which was specified up to | |
393 | * the next multiple of XDR units and then compare that | |
394 | * against the length which was actually received. | |
ba67a39e N |
395 | * Note that when RPCSEC/GSS (for example) is used, the |
396 | * data buffer can be padded so dlen might be larger | |
397 | * than required. It must never be smaller. | |
f34b9568 | 398 | */ |
ba67a39e | 399 | if (dlen < XDR_QUADLEN(len)*4) |
1da177e4 LT |
400 | return 0; |
401 | ||
f34b9568 PS |
402 | if (args->count > max_blocksize) { |
403 | args->count = max_blocksize; | |
404 | len = args->len = max_blocksize; | |
405 | } | |
3cc03b16 | 406 | rqstp->rq_vec[0].iov_base = (void*)p; |
db44bac4 | 407 | rqstp->rq_vec[0].iov_len = head->iov_len - hdr; |
f34b9568 | 408 | v = 0; |
3cc03b16 N |
409 | while (len > rqstp->rq_vec[v].iov_len) { |
410 | len -= rqstp->rq_vec[v].iov_len; | |
1da177e4 | 411 | v++; |
3cc03b16 N |
412 | rqstp->rq_vec[v].iov_base = page_address(rqstp->rq_pages[v]); |
413 | rqstp->rq_vec[v].iov_len = PAGE_SIZE; | |
1da177e4 | 414 | } |
3cc03b16 | 415 | rqstp->rq_vec[v].iov_len = len; |
f34b9568 PS |
416 | args->vlen = v + 1; |
417 | return 1; | |
1da177e4 LT |
418 | } |
419 | ||
420 | int | |
cc6acc20 | 421 | nfs3svc_decode_createargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 422 | { |
cc6acc20 CH |
423 | struct nfsd3_createargs *args = rqstp->rq_argp; |
424 | ||
1da177e4 LT |
425 | if (!(p = decode_fh(p, &args->fh)) |
426 | || !(p = decode_filename(p, &args->name, &args->len))) | |
427 | return 0; | |
428 | ||
429 | switch (args->createmode = ntohl(*p++)) { | |
430 | case NFS3_CREATE_UNCHECKED: | |
431 | case NFS3_CREATE_GUARDED: | |
072f62ed | 432 | p = decode_sattr3(p, &args->attrs); |
1da177e4 LT |
433 | break; |
434 | case NFS3_CREATE_EXCLUSIVE: | |
435 | args->verf = p; | |
436 | p += 2; | |
437 | break; | |
438 | default: | |
439 | return 0; | |
440 | } | |
441 | ||
442 | return xdr_argsize_check(rqstp, p); | |
443 | } | |
cc6acc20 | 444 | |
1da177e4 | 445 | int |
cc6acc20 | 446 | nfs3svc_decode_mkdirargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 447 | { |
cc6acc20 CH |
448 | struct nfsd3_createargs *args = rqstp->rq_argp; |
449 | ||
072f62ed N |
450 | if (!(p = decode_fh(p, &args->fh)) || |
451 | !(p = decode_filename(p, &args->name, &args->len))) | |
1da177e4 | 452 | return 0; |
072f62ed | 453 | p = decode_sattr3(p, &args->attrs); |
1da177e4 LT |
454 | |
455 | return xdr_argsize_check(rqstp, p); | |
456 | } | |
457 | ||
458 | int | |
cc6acc20 | 459 | nfs3svc_decode_symlinkargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 460 | { |
cc6acc20 | 461 | struct nfsd3_symlinkargs *args = rqstp->rq_argp; |
a628f667 | 462 | unsigned int len, avail; |
1da177e4 LT |
463 | char *old, *new; |
464 | struct kvec *vec; | |
465 | ||
072f62ed N |
466 | if (!(p = decode_fh(p, &args->ffh)) || |
467 | !(p = decode_filename(p, &args->fname, &args->flen)) | |
1da177e4 LT |
468 | ) |
469 | return 0; | |
072f62ed N |
470 | p = decode_sattr3(p, &args->attrs); |
471 | ||
1da177e4 LT |
472 | /* now decode the pathname, which might be larger than the first page. |
473 | * As we have to check for nul's anyway, we copy it into a new page | |
474 | * This page appears in the rq_res.pages list, but as pages_len is always | |
475 | * 0, it won't get in the way | |
476 | */ | |
1da177e4 LT |
477 | len = ntohl(*p++); |
478 | if (len == 0 || len > NFS3_MAXPATHLEN || len >= PAGE_SIZE) | |
479 | return 0; | |
afc59400 | 480 | args->tname = new = page_address(*(rqstp->rq_next_page++)); |
1da177e4 LT |
481 | args->tlen = len; |
482 | /* first copy and check from the first page */ | |
483 | old = (char*)p; | |
484 | vec = &rqstp->rq_arg.head[0]; | |
13bf9fbf BF |
485 | if ((void *)old > vec->iov_base + vec->iov_len) |
486 | return 0; | |
1da177e4 LT |
487 | avail = vec->iov_len - (old - (char*)vec->iov_base); |
488 | while (len && avail && *old) { | |
489 | *new++ = *old++; | |
490 | len--; | |
491 | avail--; | |
492 | } | |
493 | /* now copy next page if there is one */ | |
494 | if (len && !avail && rqstp->rq_arg.page_len) { | |
3c7aa15d | 495 | avail = min_t(unsigned int, rqstp->rq_arg.page_len, PAGE_SIZE); |
1da177e4 LT |
496 | old = page_address(rqstp->rq_arg.pages[0]); |
497 | } | |
498 | while (len && avail && *old) { | |
499 | *new++ = *old++; | |
500 | len--; | |
501 | avail--; | |
502 | } | |
503 | *new = '\0'; | |
504 | if (len) | |
505 | return 0; | |
506 | ||
507 | return 1; | |
508 | } | |
509 | ||
510 | int | |
cc6acc20 | 511 | nfs3svc_decode_mknodargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 512 | { |
cc6acc20 CH |
513 | struct nfsd3_mknodargs *args = rqstp->rq_argp; |
514 | ||
1da177e4 LT |
515 | if (!(p = decode_fh(p, &args->fh)) |
516 | || !(p = decode_filename(p, &args->name, &args->len))) | |
517 | return 0; | |
518 | ||
519 | args->ftype = ntohl(*p++); | |
520 | ||
521 | if (args->ftype == NF3BLK || args->ftype == NF3CHR | |
072f62ed N |
522 | || args->ftype == NF3SOCK || args->ftype == NF3FIFO) |
523 | p = decode_sattr3(p, &args->attrs); | |
1da177e4 LT |
524 | |
525 | if (args->ftype == NF3BLK || args->ftype == NF3CHR) { | |
526 | args->major = ntohl(*p++); | |
527 | args->minor = ntohl(*p++); | |
528 | } | |
529 | ||
530 | return xdr_argsize_check(rqstp, p); | |
531 | } | |
532 | ||
533 | int | |
cc6acc20 | 534 | nfs3svc_decode_renameargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 535 | { |
cc6acc20 CH |
536 | struct nfsd3_renameargs *args = rqstp->rq_argp; |
537 | ||
1da177e4 LT |
538 | if (!(p = decode_fh(p, &args->ffh)) |
539 | || !(p = decode_filename(p, &args->fname, &args->flen)) | |
540 | || !(p = decode_fh(p, &args->tfh)) | |
541 | || !(p = decode_filename(p, &args->tname, &args->tlen))) | |
542 | return 0; | |
543 | ||
544 | return xdr_argsize_check(rqstp, p); | |
545 | } | |
546 | ||
547 | int | |
cc6acc20 | 548 | nfs3svc_decode_readlinkargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 549 | { |
cc6acc20 CH |
550 | struct nfsd3_readlinkargs *args = rqstp->rq_argp; |
551 | ||
d40aa337 BT |
552 | p = decode_fh(p, &args->fh); |
553 | if (!p) | |
1da177e4 | 554 | return 0; |
afc59400 | 555 | args->buffer = page_address(*(rqstp->rq_next_page++)); |
1da177e4 | 556 | |
9512a16b | 557 | return xdr_argsize_check(rqstp, p); |
1da177e4 LT |
558 | } |
559 | ||
560 | int | |
cc6acc20 | 561 | nfs3svc_decode_linkargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 562 | { |
cc6acc20 CH |
563 | struct nfsd3_linkargs *args = rqstp->rq_argp; |
564 | ||
1da177e4 LT |
565 | if (!(p = decode_fh(p, &args->ffh)) |
566 | || !(p = decode_fh(p, &args->tfh)) | |
567 | || !(p = decode_filename(p, &args->tname, &args->tlen))) | |
568 | return 0; | |
569 | ||
570 | return xdr_argsize_check(rqstp, p); | |
571 | } | |
572 | ||
573 | int | |
cc6acc20 | 574 | nfs3svc_decode_readdirargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 575 | { |
cc6acc20 | 576 | struct nfsd3_readdirargs *args = rqstp->rq_argp; |
d40aa337 BT |
577 | p = decode_fh(p, &args->fh); |
578 | if (!p) | |
1da177e4 LT |
579 | return 0; |
580 | p = xdr_decode_hyper(p, &args->cookie); | |
581 | args->verf = p; p += 2; | |
582 | args->dircount = ~0; | |
583 | args->count = ntohl(*p++); | |
3c7aa15d | 584 | args->count = min_t(u32, args->count, PAGE_SIZE); |
afc59400 | 585 | args->buffer = page_address(*(rqstp->rq_next_page++)); |
1da177e4 | 586 | |
9512a16b | 587 | return xdr_argsize_check(rqstp, p); |
1da177e4 LT |
588 | } |
589 | ||
590 | int | |
cc6acc20 | 591 | nfs3svc_decode_readdirplusargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 592 | { |
cc6acc20 | 593 | struct nfsd3_readdirargs *args = rqstp->rq_argp; |
afc59400 | 594 | int len; |
7adae489 | 595 | u32 max_blocksize = svc_max_payload(rqstp); |
1da177e4 | 596 | |
d40aa337 BT |
597 | p = decode_fh(p, &args->fh); |
598 | if (!p) | |
1da177e4 LT |
599 | return 0; |
600 | p = xdr_decode_hyper(p, &args->cookie); | |
601 | args->verf = p; p += 2; | |
602 | args->dircount = ntohl(*p++); | |
603 | args->count = ntohl(*p++); | |
604 | ||
3c7aa15d | 605 | len = args->count = min(args->count, max_blocksize); |
1da177e4 | 606 | while (len > 0) { |
afc59400 | 607 | struct page *p = *(rqstp->rq_next_page++); |
1da177e4 | 608 | if (!args->buffer) |
afc59400 | 609 | args->buffer = page_address(p); |
1da177e4 LT |
610 | len -= PAGE_SIZE; |
611 | } | |
9512a16b BF |
612 | |
613 | return xdr_argsize_check(rqstp, p); | |
1da177e4 LT |
614 | } |
615 | ||
616 | int | |
cc6acc20 | 617 | nfs3svc_decode_commitargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 618 | { |
cc6acc20 | 619 | struct nfsd3_commitargs *args = rqstp->rq_argp; |
d40aa337 BT |
620 | p = decode_fh(p, &args->fh); |
621 | if (!p) | |
1da177e4 LT |
622 | return 0; |
623 | p = xdr_decode_hyper(p, &args->offset); | |
624 | args->count = ntohl(*p++); | |
625 | ||
626 | return xdr_argsize_check(rqstp, p); | |
627 | } | |
628 | ||
629 | /* | |
630 | * XDR encode functions | |
631 | */ | |
632 | /* | |
633 | * There must be an encoding function for void results so svc_process | |
634 | * will work properly. | |
635 | */ | |
636 | int | |
d16d1867 | 637 | nfs3svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 LT |
638 | { |
639 | return xdr_ressize_check(rqstp, p); | |
640 | } | |
641 | ||
642 | /* GETATTR */ | |
643 | int | |
d16d1867 | 644 | nfs3svc_encode_attrstat(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 645 | { |
d16d1867 CH |
646 | struct nfsd3_attrstat *resp = rqstp->rq_resp; |
647 | ||
40ee5dc6 | 648 | if (resp->status == 0) { |
2b0143b5 | 649 | lease_get_mtime(d_inode(resp->fh.fh_dentry), |
40ee5dc6 | 650 | &resp->stat.mtime); |
a334de28 | 651 | p = encode_fattr3(rqstp, p, &resp->fh, &resp->stat); |
40ee5dc6 | 652 | } |
1da177e4 LT |
653 | return xdr_ressize_check(rqstp, p); |
654 | } | |
655 | ||
656 | /* SETATTR, REMOVE, RMDIR */ | |
657 | int | |
d16d1867 | 658 | nfs3svc_encode_wccstat(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 659 | { |
d16d1867 CH |
660 | struct nfsd3_attrstat *resp = rqstp->rq_resp; |
661 | ||
1da177e4 LT |
662 | p = encode_wcc_data(rqstp, p, &resp->fh); |
663 | return xdr_ressize_check(rqstp, p); | |
664 | } | |
665 | ||
666 | /* LOOKUP */ | |
667 | int | |
d16d1867 | 668 | nfs3svc_encode_diropres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 669 | { |
d16d1867 CH |
670 | struct nfsd3_diropres *resp = rqstp->rq_resp; |
671 | ||
1da177e4 LT |
672 | if (resp->status == 0) { |
673 | p = encode_fh(p, &resp->fh); | |
674 | p = encode_post_op_attr(rqstp, p, &resp->fh); | |
675 | } | |
676 | p = encode_post_op_attr(rqstp, p, &resp->dirfh); | |
677 | return xdr_ressize_check(rqstp, p); | |
678 | } | |
679 | ||
680 | /* ACCESS */ | |
681 | int | |
d16d1867 | 682 | nfs3svc_encode_accessres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 683 | { |
d16d1867 CH |
684 | struct nfsd3_accessres *resp = rqstp->rq_resp; |
685 | ||
1da177e4 LT |
686 | p = encode_post_op_attr(rqstp, p, &resp->fh); |
687 | if (resp->status == 0) | |
688 | *p++ = htonl(resp->access); | |
689 | return xdr_ressize_check(rqstp, p); | |
690 | } | |
691 | ||
692 | /* READLINK */ | |
693 | int | |
d16d1867 | 694 | nfs3svc_encode_readlinkres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 695 | { |
d16d1867 CH |
696 | struct nfsd3_readlinkres *resp = rqstp->rq_resp; |
697 | ||
1da177e4 LT |
698 | p = encode_post_op_attr(rqstp, p, &resp->fh); |
699 | if (resp->status == 0) { | |
700 | *p++ = htonl(resp->len); | |
701 | xdr_ressize_check(rqstp, p); | |
702 | rqstp->rq_res.page_len = resp->len; | |
703 | if (resp->len & 3) { | |
704 | /* need to pad the tail */ | |
1da177e4 LT |
705 | rqstp->rq_res.tail[0].iov_base = p; |
706 | *p = 0; | |
707 | rqstp->rq_res.tail[0].iov_len = 4 - (resp->len&3); | |
708 | } | |
709 | return 1; | |
710 | } else | |
711 | return xdr_ressize_check(rqstp, p); | |
712 | } | |
713 | ||
714 | /* READ */ | |
715 | int | |
d16d1867 | 716 | nfs3svc_encode_readres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 717 | { |
d16d1867 CH |
718 | struct nfsd3_readres *resp = rqstp->rq_resp; |
719 | ||
1da177e4 LT |
720 | p = encode_post_op_attr(rqstp, p, &resp->fh); |
721 | if (resp->status == 0) { | |
722 | *p++ = htonl(resp->count); | |
723 | *p++ = htonl(resp->eof); | |
724 | *p++ = htonl(resp->count); /* xdr opaque count */ | |
725 | xdr_ressize_check(rqstp, p); | |
25985edc | 726 | /* now update rqstp->rq_res to reflect data as well */ |
1da177e4 LT |
727 | rqstp->rq_res.page_len = resp->count; |
728 | if (resp->count & 3) { | |
729 | /* need to pad the tail */ | |
1da177e4 LT |
730 | rqstp->rq_res.tail[0].iov_base = p; |
731 | *p = 0; | |
732 | rqstp->rq_res.tail[0].iov_len = 4 - (resp->count & 3); | |
733 | } | |
734 | return 1; | |
735 | } else | |
736 | return xdr_ressize_check(rqstp, p); | |
737 | } | |
738 | ||
739 | /* WRITE */ | |
740 | int | |
d16d1867 | 741 | nfs3svc_encode_writeres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 742 | { |
d16d1867 | 743 | struct nfsd3_writeres *resp = rqstp->rq_resp; |
b9c0ef85 SK |
744 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
745 | ||
1da177e4 LT |
746 | p = encode_wcc_data(rqstp, p, &resp->fh); |
747 | if (resp->status == 0) { | |
748 | *p++ = htonl(resp->count); | |
749 | *p++ = htonl(resp->committed); | |
b9c0ef85 SK |
750 | *p++ = htonl(nn->nfssvc_boot.tv_sec); |
751 | *p++ = htonl(nn->nfssvc_boot.tv_usec); | |
1da177e4 LT |
752 | } |
753 | return xdr_ressize_check(rqstp, p); | |
754 | } | |
755 | ||
756 | /* CREATE, MKDIR, SYMLINK, MKNOD */ | |
757 | int | |
d16d1867 | 758 | nfs3svc_encode_createres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 759 | { |
d16d1867 CH |
760 | struct nfsd3_diropres *resp = rqstp->rq_resp; |
761 | ||
1da177e4 LT |
762 | if (resp->status == 0) { |
763 | *p++ = xdr_one; | |
764 | p = encode_fh(p, &resp->fh); | |
765 | p = encode_post_op_attr(rqstp, p, &resp->fh); | |
766 | } | |
767 | p = encode_wcc_data(rqstp, p, &resp->dirfh); | |
768 | return xdr_ressize_check(rqstp, p); | |
769 | } | |
770 | ||
771 | /* RENAME */ | |
772 | int | |
d16d1867 | 773 | nfs3svc_encode_renameres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 774 | { |
d16d1867 CH |
775 | struct nfsd3_renameres *resp = rqstp->rq_resp; |
776 | ||
1da177e4 LT |
777 | p = encode_wcc_data(rqstp, p, &resp->ffh); |
778 | p = encode_wcc_data(rqstp, p, &resp->tfh); | |
779 | return xdr_ressize_check(rqstp, p); | |
780 | } | |
781 | ||
782 | /* LINK */ | |
783 | int | |
d16d1867 | 784 | nfs3svc_encode_linkres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 785 | { |
d16d1867 CH |
786 | struct nfsd3_linkres *resp = rqstp->rq_resp; |
787 | ||
1da177e4 LT |
788 | p = encode_post_op_attr(rqstp, p, &resp->fh); |
789 | p = encode_wcc_data(rqstp, p, &resp->tfh); | |
790 | return xdr_ressize_check(rqstp, p); | |
791 | } | |
792 | ||
793 | /* READDIR */ | |
794 | int | |
d16d1867 | 795 | nfs3svc_encode_readdirres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 796 | { |
d16d1867 CH |
797 | struct nfsd3_readdirres *resp = rqstp->rq_resp; |
798 | ||
1da177e4 LT |
799 | p = encode_post_op_attr(rqstp, p, &resp->fh); |
800 | ||
801 | if (resp->status == 0) { | |
802 | /* stupid readdir cookie */ | |
803 | memcpy(p, resp->verf, 8); p += 2; | |
804 | xdr_ressize_check(rqstp, p); | |
805 | if (rqstp->rq_res.head[0].iov_len + (2<<2) > PAGE_SIZE) | |
806 | return 1; /*No room for trailer */ | |
807 | rqstp->rq_res.page_len = (resp->count) << 2; | |
808 | ||
809 | /* add the 'tail' to the end of the 'head' page - page 0. */ | |
1da177e4 LT |
810 | rqstp->rq_res.tail[0].iov_base = p; |
811 | *p++ = 0; /* no more entries */ | |
812 | *p++ = htonl(resp->common.err == nfserr_eof); | |
813 | rqstp->rq_res.tail[0].iov_len = 2<<2; | |
814 | return 1; | |
815 | } else | |
816 | return xdr_ressize_check(rqstp, p); | |
817 | } | |
818 | ||
3ee6f61c | 819 | static __be32 * |
91f07168 | 820 | encode_entry_baggage(struct nfsd3_readdirres *cd, __be32 *p, const char *name, |
40ee5dc6 | 821 | int namlen, u64 ino) |
1da177e4 LT |
822 | { |
823 | *p++ = xdr_one; /* mark entry present */ | |
824 | p = xdr_encode_hyper(p, ino); /* file id */ | |
825 | p = xdr_encode_array(p, name, namlen);/* name length & name */ | |
826 | ||
827 | cd->offset = p; /* remember pointer */ | |
828 | p = xdr_encode_hyper(p, NFS_OFFSET_MAX);/* offset of next entry */ | |
829 | ||
830 | return p; | |
831 | } | |
832 | ||
efe39651 | 833 | static __be32 |
1da177e4 | 834 | compose_entry_fh(struct nfsd3_readdirres *cd, struct svc_fh *fhp, |
43b0e7ea | 835 | const char *name, int namlen, u64 ino) |
1da177e4 LT |
836 | { |
837 | struct svc_export *exp; | |
838 | struct dentry *dparent, *dchild; | |
efe39651 | 839 | __be32 rv = nfserr_noent; |
1da177e4 LT |
840 | |
841 | dparent = cd->fh.fh_dentry; | |
842 | exp = cd->fh.fh_export; | |
843 | ||
1da177e4 LT |
844 | if (isdotent(name, namlen)) { |
845 | if (namlen == 2) { | |
846 | dchild = dget_parent(dparent); | |
efe39651 AV |
847 | /* filesystem root - cannot return filehandle for ".." */ |
848 | if (dchild == dparent) | |
849 | goto out; | |
1da177e4 LT |
850 | } else |
851 | dchild = dget(dparent); | |
852 | } else | |
bbddca8e | 853 | dchild = lookup_one_len_unlocked(name, dparent, namlen); |
1da177e4 | 854 | if (IS_ERR(dchild)) |
efe39651 | 855 | return rv; |
8177e6d6 BF |
856 | if (d_mountpoint(dchild)) |
857 | goto out; | |
2b0143b5 | 858 | if (d_really_is_negative(dchild)) |
8177e6d6 | 859 | goto out; |
43b0e7ea N |
860 | if (dchild->d_inode->i_ino != ino) |
861 | goto out; | |
efe39651 | 862 | rv = fh_compose(fhp, exp, dchild, &cd->fh); |
8177e6d6 | 863 | out: |
1da177e4 LT |
864 | dput(dchild); |
865 | return rv; | |
866 | } | |
867 | ||
43b0e7ea | 868 | static __be32 *encode_entryplus_baggage(struct nfsd3_readdirres *cd, __be32 *p, const char *name, int namlen, u64 ino) |
8177e6d6 | 869 | { |
068c34c0 | 870 | struct svc_fh *fh = &cd->scratch; |
efe39651 | 871 | __be32 err; |
8177e6d6 | 872 | |
068c34c0 | 873 | fh_init(fh, NFS3_FHSIZE); |
43b0e7ea | 874 | err = compose_entry_fh(cd, fh, name, namlen, ino); |
8177e6d6 BF |
875 | if (err) { |
876 | *p++ = 0; | |
877 | *p++ = 0; | |
aed100fa | 878 | goto out; |
8177e6d6 | 879 | } |
068c34c0 | 880 | p = encode_post_op_attr(cd->rqstp, p, fh); |
8177e6d6 | 881 | *p++ = xdr_one; /* yes, a file handle follows */ |
068c34c0 | 882 | p = encode_fh(p, fh); |
aed100fa | 883 | out: |
068c34c0 | 884 | fh_put(fh); |
8177e6d6 BF |
885 | return p; |
886 | } | |
887 | ||
1da177e4 LT |
888 | /* |
889 | * Encode a directory entry. This one works for both normal readdir | |
890 | * and readdirplus. | |
891 | * The normal readdir reply requires 2 (fileid) + 1 (stringlen) | |
892 | * + string + 2 (cookie) + 1 (next) words, i.e. 6 + strlen. | |
893 | * | |
894 | * The readdirplus baggage is 1+21 words for post_op_attr, plus the | |
895 | * file handle. | |
896 | */ | |
897 | ||
898 | #define NFS3_ENTRY_BAGGAGE (2 + 1 + 2 + 1) | |
899 | #define NFS3_ENTRYPLUS_BAGGAGE (1 + 21 + 1 + (NFS3_FHSIZE >> 2)) | |
900 | static int | |
598b9a56 | 901 | encode_entry(struct readdir_cd *ccd, const char *name, int namlen, |
40ee5dc6 | 902 | loff_t offset, u64 ino, unsigned int d_type, int plus) |
1da177e4 LT |
903 | { |
904 | struct nfsd3_readdirres *cd = container_of(ccd, struct nfsd3_readdirres, | |
905 | common); | |
91f07168 | 906 | __be32 *p = cd->buffer; |
1da177e4 | 907 | caddr_t curr_page_addr = NULL; |
afc59400 | 908 | struct page ** page; |
1da177e4 LT |
909 | int slen; /* string (name) length */ |
910 | int elen; /* estimated entry length in words */ | |
911 | int num_entry_words = 0; /* actual number of words */ | |
912 | ||
913 | if (cd->offset) { | |
914 | u64 offset64 = offset; | |
915 | ||
916 | if (unlikely(cd->offset1)) { | |
917 | /* we ended up with offset on a page boundary */ | |
918 | *cd->offset = htonl(offset64 >> 32); | |
919 | *cd->offset1 = htonl(offset64 & 0xffffffff); | |
920 | cd->offset1 = NULL; | |
921 | } else { | |
598b9a56 | 922 | xdr_encode_hyper(cd->offset, offset64); |
1da177e4 LT |
923 | } |
924 | } | |
925 | ||
926 | /* | |
927 | dprintk("encode_entry(%.*s @%ld%s)\n", | |
928 | namlen, name, (long) offset, plus? " plus" : ""); | |
929 | */ | |
930 | ||
931 | /* truncate filename if too long */ | |
3c7aa15d | 932 | namlen = min(namlen, NFS3_MAXNAMLEN); |
1da177e4 LT |
933 | |
934 | slen = XDR_QUADLEN(namlen); | |
935 | elen = slen + NFS3_ENTRY_BAGGAGE | |
936 | + (plus? NFS3_ENTRYPLUS_BAGGAGE : 0); | |
937 | ||
938 | if (cd->buflen < elen) { | |
939 | cd->common.err = nfserr_toosmall; | |
940 | return -EINVAL; | |
941 | } | |
942 | ||
943 | /* determine which page in rq_respages[] we are currently filling */ | |
afc59400 BF |
944 | for (page = cd->rqstp->rq_respages + 1; |
945 | page < cd->rqstp->rq_next_page; page++) { | |
946 | curr_page_addr = page_address(*page); | |
1da177e4 LT |
947 | |
948 | if (((caddr_t)cd->buffer >= curr_page_addr) && | |
949 | ((caddr_t)cd->buffer < curr_page_addr + PAGE_SIZE)) | |
950 | break; | |
951 | } | |
952 | ||
953 | if ((caddr_t)(cd->buffer + elen) < (curr_page_addr + PAGE_SIZE)) { | |
954 | /* encode entry in current page */ | |
955 | ||
956 | p = encode_entry_baggage(cd, p, name, namlen, ino); | |
957 | ||
8177e6d6 | 958 | if (plus) |
43b0e7ea | 959 | p = encode_entryplus_baggage(cd, p, name, namlen, ino); |
1da177e4 | 960 | num_entry_words = p - cd->buffer; |
afc59400 | 961 | } else if (*(page+1) != NULL) { |
1da177e4 LT |
962 | /* temporarily encode entry into next page, then move back to |
963 | * current and next page in rq_respages[] */ | |
91f07168 | 964 | __be32 *p1, *tmp; |
1da177e4 LT |
965 | int len1, len2; |
966 | ||
967 | /* grab next page for temporary storage of entry */ | |
afc59400 | 968 | p1 = tmp = page_address(*(page+1)); |
1da177e4 LT |
969 | |
970 | p1 = encode_entry_baggage(cd, p1, name, namlen, ino); | |
971 | ||
8177e6d6 | 972 | if (plus) |
43b0e7ea | 973 | p1 = encode_entryplus_baggage(cd, p1, name, namlen, ino); |
1da177e4 LT |
974 | |
975 | /* determine entry word length and lengths to go in pages */ | |
976 | num_entry_words = p1 - tmp; | |
977 | len1 = curr_page_addr + PAGE_SIZE - (caddr_t)cd->buffer; | |
978 | if ((num_entry_words << 2) < len1) { | |
979 | /* the actual number of words in the entry is less | |
980 | * than elen and can still fit in the current page | |
981 | */ | |
982 | memmove(p, tmp, num_entry_words << 2); | |
983 | p += num_entry_words; | |
984 | ||
985 | /* update offset */ | |
986 | cd->offset = cd->buffer + (cd->offset - tmp); | |
987 | } else { | |
988 | unsigned int offset_r = (cd->offset - tmp) << 2; | |
989 | ||
990 | /* update pointer to offset location. | |
991 | * This is a 64bit quantity, so we need to | |
992 | * deal with 3 cases: | |
993 | * - entirely in first page | |
994 | * - entirely in second page | |
995 | * - 4 bytes in each page | |
996 | */ | |
997 | if (offset_r + 8 <= len1) { | |
998 | cd->offset = p + (cd->offset - tmp); | |
999 | } else if (offset_r >= len1) { | |
1000 | cd->offset -= len1 >> 2; | |
1001 | } else { | |
1002 | /* sitting on the fence */ | |
1003 | BUG_ON(offset_r != len1 - 4); | |
1004 | cd->offset = p + (cd->offset - tmp); | |
1005 | cd->offset1 = tmp; | |
1006 | } | |
1007 | ||
1008 | len2 = (num_entry_words << 2) - len1; | |
1009 | ||
1010 | /* move from temp page to current and next pages */ | |
1011 | memmove(p, tmp, len1); | |
1012 | memmove(tmp, (caddr_t)tmp+len1, len2); | |
1013 | ||
1014 | p = tmp + (len2 >> 2); | |
1015 | } | |
1016 | } | |
1017 | else { | |
1018 | cd->common.err = nfserr_toosmall; | |
1019 | return -EINVAL; | |
1020 | } | |
1021 | ||
1022 | cd->buflen -= num_entry_words; | |
1023 | cd->buffer = p; | |
1024 | cd->common.err = nfs_ok; | |
1025 | return 0; | |
1026 | ||
1027 | } | |
1028 | ||
1029 | int | |
a0ad13ef N |
1030 | nfs3svc_encode_entry(void *cd, const char *name, |
1031 | int namlen, loff_t offset, u64 ino, unsigned int d_type) | |
1da177e4 LT |
1032 | { |
1033 | return encode_entry(cd, name, namlen, offset, ino, d_type, 0); | |
1034 | } | |
1035 | ||
1036 | int | |
a0ad13ef N |
1037 | nfs3svc_encode_entry_plus(void *cd, const char *name, |
1038 | int namlen, loff_t offset, u64 ino, | |
1039 | unsigned int d_type) | |
1da177e4 LT |
1040 | { |
1041 | return encode_entry(cd, name, namlen, offset, ino, d_type, 1); | |
1042 | } | |
1043 | ||
1044 | /* FSSTAT */ | |
1045 | int | |
d16d1867 | 1046 | nfs3svc_encode_fsstatres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 1047 | { |
d16d1867 | 1048 | struct nfsd3_fsstatres *resp = rqstp->rq_resp; |
1da177e4 LT |
1049 | struct kstatfs *s = &resp->stats; |
1050 | u64 bs = s->f_bsize; | |
1051 | ||
1052 | *p++ = xdr_zero; /* no post_op_attr */ | |
1053 | ||
1054 | if (resp->status == 0) { | |
1055 | p = xdr_encode_hyper(p, bs * s->f_blocks); /* total bytes */ | |
1056 | p = xdr_encode_hyper(p, bs * s->f_bfree); /* free bytes */ | |
1057 | p = xdr_encode_hyper(p, bs * s->f_bavail); /* user available bytes */ | |
1058 | p = xdr_encode_hyper(p, s->f_files); /* total inodes */ | |
1059 | p = xdr_encode_hyper(p, s->f_ffree); /* free inodes */ | |
1060 | p = xdr_encode_hyper(p, s->f_ffree); /* user available inodes */ | |
1061 | *p++ = htonl(resp->invarsec); /* mean unchanged time */ | |
1062 | } | |
1063 | return xdr_ressize_check(rqstp, p); | |
1064 | } | |
1065 | ||
1066 | /* FSINFO */ | |
1067 | int | |
d16d1867 | 1068 | nfs3svc_encode_fsinfores(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 1069 | { |
d16d1867 CH |
1070 | struct nfsd3_fsinfores *resp = rqstp->rq_resp; |
1071 | ||
1da177e4 LT |
1072 | *p++ = xdr_zero; /* no post_op_attr */ |
1073 | ||
1074 | if (resp->status == 0) { | |
1075 | *p++ = htonl(resp->f_rtmax); | |
1076 | *p++ = htonl(resp->f_rtpref); | |
1077 | *p++ = htonl(resp->f_rtmult); | |
1078 | *p++ = htonl(resp->f_wtmax); | |
1079 | *p++ = htonl(resp->f_wtpref); | |
1080 | *p++ = htonl(resp->f_wtmult); | |
1081 | *p++ = htonl(resp->f_dtpref); | |
1082 | p = xdr_encode_hyper(p, resp->f_maxfilesize); | |
1083 | *p++ = xdr_one; | |
1084 | *p++ = xdr_zero; | |
1085 | *p++ = htonl(resp->f_properties); | |
1086 | } | |
1087 | ||
1088 | return xdr_ressize_check(rqstp, p); | |
1089 | } | |
1090 | ||
1091 | /* PATHCONF */ | |
1092 | int | |
d16d1867 | 1093 | nfs3svc_encode_pathconfres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 1094 | { |
d16d1867 CH |
1095 | struct nfsd3_pathconfres *resp = rqstp->rq_resp; |
1096 | ||
1da177e4 LT |
1097 | *p++ = xdr_zero; /* no post_op_attr */ |
1098 | ||
1099 | if (resp->status == 0) { | |
1100 | *p++ = htonl(resp->p_link_max); | |
1101 | *p++ = htonl(resp->p_name_max); | |
1102 | *p++ = htonl(resp->p_no_trunc); | |
1103 | *p++ = htonl(resp->p_chown_restricted); | |
1104 | *p++ = htonl(resp->p_case_insensitive); | |
1105 | *p++ = htonl(resp->p_case_preserving); | |
1106 | } | |
1107 | ||
1108 | return xdr_ressize_check(rqstp, p); | |
1109 | } | |
1110 | ||
1111 | /* COMMIT */ | |
1112 | int | |
d16d1867 | 1113 | nfs3svc_encode_commitres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 1114 | { |
d16d1867 | 1115 | struct nfsd3_commitres *resp = rqstp->rq_resp; |
b9c0ef85 SK |
1116 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1117 | ||
1da177e4 LT |
1118 | p = encode_wcc_data(rqstp, p, &resp->fh); |
1119 | /* Write verifier */ | |
1120 | if (resp->status == 0) { | |
b9c0ef85 SK |
1121 | *p++ = htonl(nn->nfssvc_boot.tv_sec); |
1122 | *p++ = htonl(nn->nfssvc_boot.tv_usec); | |
1da177e4 LT |
1123 | } |
1124 | return xdr_ressize_check(rqstp, p); | |
1125 | } | |
1126 | ||
1127 | /* | |
1128 | * XDR release functions | |
1129 | */ | |
1150ded8 CH |
1130 | void |
1131 | nfs3svc_release_fhandle(struct svc_rqst *rqstp) | |
1da177e4 | 1132 | { |
1150ded8 CH |
1133 | struct nfsd3_attrstat *resp = rqstp->rq_resp; |
1134 | ||
1da177e4 | 1135 | fh_put(&resp->fh); |
1da177e4 LT |
1136 | } |
1137 | ||
1150ded8 CH |
1138 | void |
1139 | nfs3svc_release_fhandle2(struct svc_rqst *rqstp) | |
1da177e4 | 1140 | { |
1150ded8 CH |
1141 | struct nfsd3_fhandle_pair *resp = rqstp->rq_resp; |
1142 | ||
1da177e4 LT |
1143 | fh_put(&resp->fh1); |
1144 | fh_put(&resp->fh2); | |
1da177e4 | 1145 | } |