]>
Commit | Line | Data |
---|---|---|
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 | |
91f07168 | 276 | nfs3svc_decode_fhandle(struct svc_rqst *rqstp, __be32 *p, struct nfsd_fhandle *args) |
1da177e4 | 277 | { |
d40aa337 BT |
278 | p = decode_fh(p, &args->fh); |
279 | if (!p) | |
1da177e4 LT |
280 | return 0; |
281 | return xdr_argsize_check(rqstp, p); | |
282 | } | |
283 | ||
284 | int | |
91f07168 | 285 | nfs3svc_decode_sattrargs(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
286 | struct nfsd3_sattrargs *args) |
287 | { | |
d40aa337 BT |
288 | p = decode_fh(p, &args->fh); |
289 | if (!p) | |
1da177e4 | 290 | return 0; |
072f62ed | 291 | p = decode_sattr3(p, &args->attrs); |
1da177e4 LT |
292 | |
293 | if ((args->check_guard = ntohl(*p++)) != 0) { | |
294 | struct timespec time; | |
295 | p = decode_time3(p, &time); | |
296 | args->guardtime = time.tv_sec; | |
297 | } | |
298 | ||
299 | return xdr_argsize_check(rqstp, p); | |
300 | } | |
301 | ||
302 | int | |
91f07168 | 303 | nfs3svc_decode_diropargs(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
304 | struct nfsd3_diropargs *args) |
305 | { | |
306 | if (!(p = decode_fh(p, &args->fh)) | |
307 | || !(p = decode_filename(p, &args->name, &args->len))) | |
308 | return 0; | |
309 | ||
310 | return xdr_argsize_check(rqstp, p); | |
311 | } | |
312 | ||
313 | int | |
91f07168 | 314 | nfs3svc_decode_accessargs(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
315 | struct nfsd3_accessargs *args) |
316 | { | |
d40aa337 BT |
317 | p = decode_fh(p, &args->fh); |
318 | if (!p) | |
1da177e4 LT |
319 | return 0; |
320 | args->access = ntohl(*p++); | |
321 | ||
322 | return xdr_argsize_check(rqstp, p); | |
323 | } | |
324 | ||
325 | int | |
91f07168 | 326 | nfs3svc_decode_readargs(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
327 | struct nfsd3_readargs *args) |
328 | { | |
329 | unsigned int len; | |
afc59400 | 330 | int v; |
7adae489 | 331 | u32 max_blocksize = svc_max_payload(rqstp); |
1da177e4 | 332 | |
d40aa337 BT |
333 | p = decode_fh(p, &args->fh); |
334 | if (!p) | |
1da177e4 | 335 | return 0; |
072f62ed | 336 | p = xdr_decode_hyper(p, &args->offset); |
3c7aa15d | 337 | args->count = ntohl(*p++); |
51f56777 BF |
338 | |
339 | if (!xdr_argsize_check(rqstp, p)) | |
340 | return 0; | |
341 | ||
3c7aa15d | 342 | len = min(args->count, max_blocksize); |
1da177e4 LT |
343 | |
344 | /* set up the kvec */ | |
345 | v=0; | |
346 | while (len > 0) { | |
afc59400 BF |
347 | struct page *p = *(rqstp->rq_next_page++); |
348 | ||
349 | rqstp->rq_vec[v].iov_base = page_address(p); | |
3c7aa15d | 350 | rqstp->rq_vec[v].iov_len = min_t(unsigned int, len, PAGE_SIZE); |
3cc03b16 | 351 | len -= rqstp->rq_vec[v].iov_len; |
1da177e4 LT |
352 | v++; |
353 | } | |
354 | args->vlen = v; | |
51f56777 | 355 | return 1; |
1da177e4 LT |
356 | } |
357 | ||
358 | int | |
91f07168 | 359 | nfs3svc_decode_writeargs(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
360 | struct nfsd3_writeargs *args) |
361 | { | |
f34b9568 | 362 | unsigned int len, v, hdr, dlen; |
7adae489 | 363 | u32 max_blocksize = svc_max_payload(rqstp); |
db44bac4 BF |
364 | struct kvec *head = rqstp->rq_arg.head; |
365 | struct kvec *tail = rqstp->rq_arg.tail; | |
1da177e4 | 366 | |
d40aa337 BT |
367 | p = decode_fh(p, &args->fh); |
368 | if (!p) | |
1da177e4 | 369 | return 0; |
072f62ed | 370 | p = xdr_decode_hyper(p, &args->offset); |
1da177e4 LT |
371 | |
372 | args->count = ntohl(*p++); | |
373 | args->stable = ntohl(*p++); | |
374 | len = args->len = ntohl(*p++); | |
13bf9fbf BF |
375 | if ((void *)p > head->iov_base + head->iov_len) |
376 | return 0; | |
f34b9568 PS |
377 | /* |
378 | * The count must equal the amount of data passed. | |
379 | */ | |
380 | if (args->count != args->len) | |
381 | return 0; | |
1da177e4 | 382 | |
f34b9568 PS |
383 | /* |
384 | * Check to make sure that we got the right number of | |
385 | * bytes. | |
f34b9568 | 386 | */ |
db44bac4 BF |
387 | hdr = (void*)p - head->iov_base; |
388 | dlen = head->iov_len + rqstp->rq_arg.page_len + tail->iov_len - hdr; | |
f34b9568 PS |
389 | /* |
390 | * Round the length of the data which was specified up to | |
391 | * the next multiple of XDR units and then compare that | |
392 | * against the length which was actually received. | |
ba67a39e N |
393 | * Note that when RPCSEC/GSS (for example) is used, the |
394 | * data buffer can be padded so dlen might be larger | |
395 | * than required. It must never be smaller. | |
f34b9568 | 396 | */ |
ba67a39e | 397 | if (dlen < XDR_QUADLEN(len)*4) |
1da177e4 LT |
398 | return 0; |
399 | ||
f34b9568 PS |
400 | if (args->count > max_blocksize) { |
401 | args->count = max_blocksize; | |
402 | len = args->len = max_blocksize; | |
403 | } | |
3cc03b16 | 404 | rqstp->rq_vec[0].iov_base = (void*)p; |
db44bac4 | 405 | rqstp->rq_vec[0].iov_len = head->iov_len - hdr; |
f34b9568 | 406 | v = 0; |
3cc03b16 N |
407 | while (len > rqstp->rq_vec[v].iov_len) { |
408 | len -= rqstp->rq_vec[v].iov_len; | |
1da177e4 | 409 | v++; |
3cc03b16 N |
410 | rqstp->rq_vec[v].iov_base = page_address(rqstp->rq_pages[v]); |
411 | rqstp->rq_vec[v].iov_len = PAGE_SIZE; | |
1da177e4 | 412 | } |
3cc03b16 | 413 | rqstp->rq_vec[v].iov_len = len; |
f34b9568 PS |
414 | args->vlen = v + 1; |
415 | return 1; | |
1da177e4 LT |
416 | } |
417 | ||
418 | int | |
91f07168 | 419 | nfs3svc_decode_createargs(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
420 | struct nfsd3_createargs *args) |
421 | { | |
422 | if (!(p = decode_fh(p, &args->fh)) | |
423 | || !(p = decode_filename(p, &args->name, &args->len))) | |
424 | return 0; | |
425 | ||
426 | switch (args->createmode = ntohl(*p++)) { | |
427 | case NFS3_CREATE_UNCHECKED: | |
428 | case NFS3_CREATE_GUARDED: | |
072f62ed | 429 | p = decode_sattr3(p, &args->attrs); |
1da177e4 LT |
430 | break; |
431 | case NFS3_CREATE_EXCLUSIVE: | |
432 | args->verf = p; | |
433 | p += 2; | |
434 | break; | |
435 | default: | |
436 | return 0; | |
437 | } | |
438 | ||
439 | return xdr_argsize_check(rqstp, p); | |
440 | } | |
441 | int | |
91f07168 | 442 | nfs3svc_decode_mkdirargs(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
443 | struct nfsd3_createargs *args) |
444 | { | |
072f62ed N |
445 | if (!(p = decode_fh(p, &args->fh)) || |
446 | !(p = decode_filename(p, &args->name, &args->len))) | |
1da177e4 | 447 | return 0; |
072f62ed | 448 | p = decode_sattr3(p, &args->attrs); |
1da177e4 LT |
449 | |
450 | return xdr_argsize_check(rqstp, p); | |
451 | } | |
452 | ||
453 | int | |
91f07168 | 454 | nfs3svc_decode_symlinkargs(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
455 | struct nfsd3_symlinkargs *args) |
456 | { | |
a628f667 | 457 | unsigned int len, avail; |
1da177e4 LT |
458 | char *old, *new; |
459 | struct kvec *vec; | |
460 | ||
072f62ed N |
461 | if (!(p = decode_fh(p, &args->ffh)) || |
462 | !(p = decode_filename(p, &args->fname, &args->flen)) | |
1da177e4 LT |
463 | ) |
464 | return 0; | |
072f62ed N |
465 | p = decode_sattr3(p, &args->attrs); |
466 | ||
1da177e4 LT |
467 | /* now decode the pathname, which might be larger than the first page. |
468 | * As we have to check for nul's anyway, we copy it into a new page | |
469 | * This page appears in the rq_res.pages list, but as pages_len is always | |
470 | * 0, it won't get in the way | |
471 | */ | |
1da177e4 LT |
472 | len = ntohl(*p++); |
473 | if (len == 0 || len > NFS3_MAXPATHLEN || len >= PAGE_SIZE) | |
474 | return 0; | |
afc59400 | 475 | args->tname = new = page_address(*(rqstp->rq_next_page++)); |
1da177e4 LT |
476 | args->tlen = len; |
477 | /* first copy and check from the first page */ | |
478 | old = (char*)p; | |
479 | vec = &rqstp->rq_arg.head[0]; | |
13bf9fbf BF |
480 | if ((void *)old > vec->iov_base + vec->iov_len) |
481 | return 0; | |
1da177e4 LT |
482 | avail = vec->iov_len - (old - (char*)vec->iov_base); |
483 | while (len && avail && *old) { | |
484 | *new++ = *old++; | |
485 | len--; | |
486 | avail--; | |
487 | } | |
488 | /* now copy next page if there is one */ | |
489 | if (len && !avail && rqstp->rq_arg.page_len) { | |
3c7aa15d | 490 | avail = min_t(unsigned int, rqstp->rq_arg.page_len, PAGE_SIZE); |
1da177e4 LT |
491 | old = page_address(rqstp->rq_arg.pages[0]); |
492 | } | |
493 | while (len && avail && *old) { | |
494 | *new++ = *old++; | |
495 | len--; | |
496 | avail--; | |
497 | } | |
498 | *new = '\0'; | |
499 | if (len) | |
500 | return 0; | |
501 | ||
502 | return 1; | |
503 | } | |
504 | ||
505 | int | |
91f07168 | 506 | nfs3svc_decode_mknodargs(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
507 | struct nfsd3_mknodargs *args) |
508 | { | |
509 | if (!(p = decode_fh(p, &args->fh)) | |
510 | || !(p = decode_filename(p, &args->name, &args->len))) | |
511 | return 0; | |
512 | ||
513 | args->ftype = ntohl(*p++); | |
514 | ||
515 | if (args->ftype == NF3BLK || args->ftype == NF3CHR | |
072f62ed N |
516 | || args->ftype == NF3SOCK || args->ftype == NF3FIFO) |
517 | p = decode_sattr3(p, &args->attrs); | |
1da177e4 LT |
518 | |
519 | if (args->ftype == NF3BLK || args->ftype == NF3CHR) { | |
520 | args->major = ntohl(*p++); | |
521 | args->minor = ntohl(*p++); | |
522 | } | |
523 | ||
524 | return xdr_argsize_check(rqstp, p); | |
525 | } | |
526 | ||
527 | int | |
91f07168 | 528 | nfs3svc_decode_renameargs(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
529 | struct nfsd3_renameargs *args) |
530 | { | |
531 | if (!(p = decode_fh(p, &args->ffh)) | |
532 | || !(p = decode_filename(p, &args->fname, &args->flen)) | |
533 | || !(p = decode_fh(p, &args->tfh)) | |
534 | || !(p = decode_filename(p, &args->tname, &args->tlen))) | |
535 | return 0; | |
536 | ||
537 | return xdr_argsize_check(rqstp, p); | |
538 | } | |
539 | ||
540 | int | |
91f07168 | 541 | nfs3svc_decode_readlinkargs(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
542 | struct nfsd3_readlinkargs *args) |
543 | { | |
d40aa337 BT |
544 | p = decode_fh(p, &args->fh); |
545 | if (!p) | |
1da177e4 | 546 | return 0; |
51f56777 BF |
547 | if (!xdr_argsize_check(rqstp, p)) |
548 | return 0; | |
afc59400 | 549 | args->buffer = page_address(*(rqstp->rq_next_page++)); |
1da177e4 | 550 | |
51f56777 | 551 | return 1; |
1da177e4 LT |
552 | } |
553 | ||
554 | int | |
91f07168 | 555 | nfs3svc_decode_linkargs(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
556 | struct nfsd3_linkargs *args) |
557 | { | |
558 | if (!(p = decode_fh(p, &args->ffh)) | |
559 | || !(p = decode_fh(p, &args->tfh)) | |
560 | || !(p = decode_filename(p, &args->tname, &args->tlen))) | |
561 | return 0; | |
562 | ||
563 | return xdr_argsize_check(rqstp, p); | |
564 | } | |
565 | ||
566 | int | |
91f07168 | 567 | nfs3svc_decode_readdirargs(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
568 | struct nfsd3_readdirargs *args) |
569 | { | |
d40aa337 BT |
570 | p = decode_fh(p, &args->fh); |
571 | if (!p) | |
1da177e4 LT |
572 | return 0; |
573 | p = xdr_decode_hyper(p, &args->cookie); | |
574 | args->verf = p; p += 2; | |
575 | args->dircount = ~0; | |
576 | args->count = ntohl(*p++); | |
51f56777 BF |
577 | |
578 | if (!xdr_argsize_check(rqstp, p)) | |
579 | return 0; | |
580 | ||
3c7aa15d | 581 | args->count = min_t(u32, args->count, PAGE_SIZE); |
afc59400 | 582 | args->buffer = page_address(*(rqstp->rq_next_page++)); |
1da177e4 | 583 | |
51f56777 | 584 | return 1; |
1da177e4 LT |
585 | } |
586 | ||
587 | int | |
91f07168 | 588 | nfs3svc_decode_readdirplusargs(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
589 | struct nfsd3_readdirargs *args) |
590 | { | |
afc59400 | 591 | int len; |
7adae489 | 592 | u32 max_blocksize = svc_max_payload(rqstp); |
1da177e4 | 593 | |
d40aa337 BT |
594 | p = decode_fh(p, &args->fh); |
595 | if (!p) | |
1da177e4 LT |
596 | return 0; |
597 | p = xdr_decode_hyper(p, &args->cookie); | |
598 | args->verf = p; p += 2; | |
599 | args->dircount = ntohl(*p++); | |
600 | args->count = ntohl(*p++); | |
601 | ||
51f56777 BF |
602 | if (!xdr_argsize_check(rqstp, p)) |
603 | return 0; | |
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 | } | |
51f56777 | 612 | return 1; |
1da177e4 LT |
613 | } |
614 | ||
615 | int | |
91f07168 | 616 | nfs3svc_decode_commitargs(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
617 | struct nfsd3_commitargs *args) |
618 | { | |
d40aa337 BT |
619 | p = decode_fh(p, &args->fh); |
620 | if (!p) | |
1da177e4 LT |
621 | return 0; |
622 | p = xdr_decode_hyper(p, &args->offset); | |
623 | args->count = ntohl(*p++); | |
624 | ||
625 | return xdr_argsize_check(rqstp, p); | |
626 | } | |
627 | ||
628 | /* | |
629 | * XDR encode functions | |
630 | */ | |
631 | /* | |
632 | * There must be an encoding function for void results so svc_process | |
633 | * will work properly. | |
634 | */ | |
635 | int | |
91f07168 | 636 | nfs3svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy) |
1da177e4 LT |
637 | { |
638 | return xdr_ressize_check(rqstp, p); | |
639 | } | |
640 | ||
641 | /* GETATTR */ | |
642 | int | |
91f07168 | 643 | nfs3svc_encode_attrstat(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
644 | struct nfsd3_attrstat *resp) |
645 | { | |
40ee5dc6 | 646 | if (resp->status == 0) { |
2b0143b5 | 647 | lease_get_mtime(d_inode(resp->fh.fh_dentry), |
40ee5dc6 | 648 | &resp->stat.mtime); |
a334de28 | 649 | p = encode_fattr3(rqstp, p, &resp->fh, &resp->stat); |
40ee5dc6 | 650 | } |
1da177e4 LT |
651 | return xdr_ressize_check(rqstp, p); |
652 | } | |
653 | ||
654 | /* SETATTR, REMOVE, RMDIR */ | |
655 | int | |
91f07168 | 656 | nfs3svc_encode_wccstat(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
657 | struct nfsd3_attrstat *resp) |
658 | { | |
659 | p = encode_wcc_data(rqstp, p, &resp->fh); | |
660 | return xdr_ressize_check(rqstp, p); | |
661 | } | |
662 | ||
663 | /* LOOKUP */ | |
664 | int | |
91f07168 | 665 | nfs3svc_encode_diropres(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
666 | struct nfsd3_diropres *resp) |
667 | { | |
668 | if (resp->status == 0) { | |
669 | p = encode_fh(p, &resp->fh); | |
670 | p = encode_post_op_attr(rqstp, p, &resp->fh); | |
671 | } | |
672 | p = encode_post_op_attr(rqstp, p, &resp->dirfh); | |
673 | return xdr_ressize_check(rqstp, p); | |
674 | } | |
675 | ||
676 | /* ACCESS */ | |
677 | int | |
91f07168 | 678 | nfs3svc_encode_accessres(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
679 | struct nfsd3_accessres *resp) |
680 | { | |
681 | p = encode_post_op_attr(rqstp, p, &resp->fh); | |
682 | if (resp->status == 0) | |
683 | *p++ = htonl(resp->access); | |
684 | return xdr_ressize_check(rqstp, p); | |
685 | } | |
686 | ||
687 | /* READLINK */ | |
688 | int | |
91f07168 | 689 | nfs3svc_encode_readlinkres(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
690 | struct nfsd3_readlinkres *resp) |
691 | { | |
692 | p = encode_post_op_attr(rqstp, p, &resp->fh); | |
693 | if (resp->status == 0) { | |
694 | *p++ = htonl(resp->len); | |
695 | xdr_ressize_check(rqstp, p); | |
696 | rqstp->rq_res.page_len = resp->len; | |
697 | if (resp->len & 3) { | |
698 | /* need to pad the tail */ | |
1da177e4 LT |
699 | rqstp->rq_res.tail[0].iov_base = p; |
700 | *p = 0; | |
701 | rqstp->rq_res.tail[0].iov_len = 4 - (resp->len&3); | |
702 | } | |
703 | return 1; | |
704 | } else | |
705 | return xdr_ressize_check(rqstp, p); | |
706 | } | |
707 | ||
708 | /* READ */ | |
709 | int | |
91f07168 | 710 | nfs3svc_encode_readres(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
711 | struct nfsd3_readres *resp) |
712 | { | |
713 | p = encode_post_op_attr(rqstp, p, &resp->fh); | |
714 | if (resp->status == 0) { | |
715 | *p++ = htonl(resp->count); | |
716 | *p++ = htonl(resp->eof); | |
717 | *p++ = htonl(resp->count); /* xdr opaque count */ | |
718 | xdr_ressize_check(rqstp, p); | |
25985edc | 719 | /* now update rqstp->rq_res to reflect data as well */ |
1da177e4 LT |
720 | rqstp->rq_res.page_len = resp->count; |
721 | if (resp->count & 3) { | |
722 | /* need to pad the tail */ | |
1da177e4 LT |
723 | rqstp->rq_res.tail[0].iov_base = p; |
724 | *p = 0; | |
725 | rqstp->rq_res.tail[0].iov_len = 4 - (resp->count & 3); | |
726 | } | |
727 | return 1; | |
728 | } else | |
729 | return xdr_ressize_check(rqstp, p); | |
730 | } | |
731 | ||
732 | /* WRITE */ | |
733 | int | |
91f07168 | 734 | nfs3svc_encode_writeres(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
735 | struct nfsd3_writeres *resp) |
736 | { | |
b9c0ef85 SK |
737 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
738 | ||
1da177e4 LT |
739 | p = encode_wcc_data(rqstp, p, &resp->fh); |
740 | if (resp->status == 0) { | |
741 | *p++ = htonl(resp->count); | |
742 | *p++ = htonl(resp->committed); | |
b9c0ef85 SK |
743 | *p++ = htonl(nn->nfssvc_boot.tv_sec); |
744 | *p++ = htonl(nn->nfssvc_boot.tv_usec); | |
1da177e4 LT |
745 | } |
746 | return xdr_ressize_check(rqstp, p); | |
747 | } | |
748 | ||
749 | /* CREATE, MKDIR, SYMLINK, MKNOD */ | |
750 | int | |
91f07168 | 751 | nfs3svc_encode_createres(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
752 | struct nfsd3_diropres *resp) |
753 | { | |
754 | if (resp->status == 0) { | |
755 | *p++ = xdr_one; | |
756 | p = encode_fh(p, &resp->fh); | |
757 | p = encode_post_op_attr(rqstp, p, &resp->fh); | |
758 | } | |
759 | p = encode_wcc_data(rqstp, p, &resp->dirfh); | |
760 | return xdr_ressize_check(rqstp, p); | |
761 | } | |
762 | ||
763 | /* RENAME */ | |
764 | int | |
91f07168 | 765 | nfs3svc_encode_renameres(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
766 | struct nfsd3_renameres *resp) |
767 | { | |
768 | p = encode_wcc_data(rqstp, p, &resp->ffh); | |
769 | p = encode_wcc_data(rqstp, p, &resp->tfh); | |
770 | return xdr_ressize_check(rqstp, p); | |
771 | } | |
772 | ||
773 | /* LINK */ | |
774 | int | |
91f07168 | 775 | nfs3svc_encode_linkres(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
776 | struct nfsd3_linkres *resp) |
777 | { | |
778 | p = encode_post_op_attr(rqstp, p, &resp->fh); | |
779 | p = encode_wcc_data(rqstp, p, &resp->tfh); | |
780 | return xdr_ressize_check(rqstp, p); | |
781 | } | |
782 | ||
783 | /* READDIR */ | |
784 | int | |
91f07168 | 785 | nfs3svc_encode_readdirres(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
786 | struct nfsd3_readdirres *resp) |
787 | { | |
788 | p = encode_post_op_attr(rqstp, p, &resp->fh); | |
789 | ||
790 | if (resp->status == 0) { | |
791 | /* stupid readdir cookie */ | |
792 | memcpy(p, resp->verf, 8); p += 2; | |
793 | xdr_ressize_check(rqstp, p); | |
794 | if (rqstp->rq_res.head[0].iov_len + (2<<2) > PAGE_SIZE) | |
795 | return 1; /*No room for trailer */ | |
796 | rqstp->rq_res.page_len = (resp->count) << 2; | |
797 | ||
798 | /* add the 'tail' to the end of the 'head' page - page 0. */ | |
1da177e4 LT |
799 | rqstp->rq_res.tail[0].iov_base = p; |
800 | *p++ = 0; /* no more entries */ | |
801 | *p++ = htonl(resp->common.err == nfserr_eof); | |
802 | rqstp->rq_res.tail[0].iov_len = 2<<2; | |
803 | return 1; | |
804 | } else | |
805 | return xdr_ressize_check(rqstp, p); | |
806 | } | |
807 | ||
3ee6f61c | 808 | static __be32 * |
91f07168 | 809 | encode_entry_baggage(struct nfsd3_readdirres *cd, __be32 *p, const char *name, |
40ee5dc6 | 810 | int namlen, u64 ino) |
1da177e4 LT |
811 | { |
812 | *p++ = xdr_one; /* mark entry present */ | |
813 | p = xdr_encode_hyper(p, ino); /* file id */ | |
814 | p = xdr_encode_array(p, name, namlen);/* name length & name */ | |
815 | ||
816 | cd->offset = p; /* remember pointer */ | |
817 | p = xdr_encode_hyper(p, NFS_OFFSET_MAX);/* offset of next entry */ | |
818 | ||
819 | return p; | |
820 | } | |
821 | ||
efe39651 | 822 | static __be32 |
1da177e4 | 823 | compose_entry_fh(struct nfsd3_readdirres *cd, struct svc_fh *fhp, |
43b0e7ea | 824 | const char *name, int namlen, u64 ino) |
1da177e4 LT |
825 | { |
826 | struct svc_export *exp; | |
827 | struct dentry *dparent, *dchild; | |
efe39651 | 828 | __be32 rv = nfserr_noent; |
1da177e4 LT |
829 | |
830 | dparent = cd->fh.fh_dentry; | |
831 | exp = cd->fh.fh_export; | |
832 | ||
1da177e4 LT |
833 | if (isdotent(name, namlen)) { |
834 | if (namlen == 2) { | |
835 | dchild = dget_parent(dparent); | |
efe39651 AV |
836 | /* filesystem root - cannot return filehandle for ".." */ |
837 | if (dchild == dparent) | |
838 | goto out; | |
1da177e4 LT |
839 | } else |
840 | dchild = dget(dparent); | |
841 | } else | |
bbddca8e | 842 | dchild = lookup_one_len_unlocked(name, dparent, namlen); |
1da177e4 | 843 | if (IS_ERR(dchild)) |
efe39651 | 844 | return rv; |
8177e6d6 BF |
845 | if (d_mountpoint(dchild)) |
846 | goto out; | |
2b0143b5 | 847 | if (d_really_is_negative(dchild)) |
8177e6d6 | 848 | goto out; |
43b0e7ea N |
849 | if (dchild->d_inode->i_ino != ino) |
850 | goto out; | |
efe39651 | 851 | rv = fh_compose(fhp, exp, dchild, &cd->fh); |
8177e6d6 | 852 | out: |
1da177e4 LT |
853 | dput(dchild); |
854 | return rv; | |
855 | } | |
856 | ||
43b0e7ea | 857 | static __be32 *encode_entryplus_baggage(struct nfsd3_readdirres *cd, __be32 *p, const char *name, int namlen, u64 ino) |
8177e6d6 | 858 | { |
068c34c0 | 859 | struct svc_fh *fh = &cd->scratch; |
efe39651 | 860 | __be32 err; |
8177e6d6 | 861 | |
068c34c0 | 862 | fh_init(fh, NFS3_FHSIZE); |
43b0e7ea | 863 | err = compose_entry_fh(cd, fh, name, namlen, ino); |
8177e6d6 BF |
864 | if (err) { |
865 | *p++ = 0; | |
866 | *p++ = 0; | |
aed100fa | 867 | goto out; |
8177e6d6 | 868 | } |
068c34c0 | 869 | p = encode_post_op_attr(cd->rqstp, p, fh); |
8177e6d6 | 870 | *p++ = xdr_one; /* yes, a file handle follows */ |
068c34c0 | 871 | p = encode_fh(p, fh); |
aed100fa | 872 | out: |
068c34c0 | 873 | fh_put(fh); |
8177e6d6 BF |
874 | return p; |
875 | } | |
876 | ||
1da177e4 LT |
877 | /* |
878 | * Encode a directory entry. This one works for both normal readdir | |
879 | * and readdirplus. | |
880 | * The normal readdir reply requires 2 (fileid) + 1 (stringlen) | |
881 | * + string + 2 (cookie) + 1 (next) words, i.e. 6 + strlen. | |
882 | * | |
883 | * The readdirplus baggage is 1+21 words for post_op_attr, plus the | |
884 | * file handle. | |
885 | */ | |
886 | ||
887 | #define NFS3_ENTRY_BAGGAGE (2 + 1 + 2 + 1) | |
888 | #define NFS3_ENTRYPLUS_BAGGAGE (1 + 21 + 1 + (NFS3_FHSIZE >> 2)) | |
889 | static int | |
598b9a56 | 890 | encode_entry(struct readdir_cd *ccd, const char *name, int namlen, |
40ee5dc6 | 891 | loff_t offset, u64 ino, unsigned int d_type, int plus) |
1da177e4 LT |
892 | { |
893 | struct nfsd3_readdirres *cd = container_of(ccd, struct nfsd3_readdirres, | |
894 | common); | |
91f07168 | 895 | __be32 *p = cd->buffer; |
1da177e4 | 896 | caddr_t curr_page_addr = NULL; |
afc59400 | 897 | struct page ** page; |
1da177e4 LT |
898 | int slen; /* string (name) length */ |
899 | int elen; /* estimated entry length in words */ | |
900 | int num_entry_words = 0; /* actual number of words */ | |
901 | ||
902 | if (cd->offset) { | |
903 | u64 offset64 = offset; | |
904 | ||
905 | if (unlikely(cd->offset1)) { | |
906 | /* we ended up with offset on a page boundary */ | |
907 | *cd->offset = htonl(offset64 >> 32); | |
908 | *cd->offset1 = htonl(offset64 & 0xffffffff); | |
909 | cd->offset1 = NULL; | |
910 | } else { | |
598b9a56 | 911 | xdr_encode_hyper(cd->offset, offset64); |
1da177e4 LT |
912 | } |
913 | } | |
914 | ||
915 | /* | |
916 | dprintk("encode_entry(%.*s @%ld%s)\n", | |
917 | namlen, name, (long) offset, plus? " plus" : ""); | |
918 | */ | |
919 | ||
920 | /* truncate filename if too long */ | |
3c7aa15d | 921 | namlen = min(namlen, NFS3_MAXNAMLEN); |
1da177e4 LT |
922 | |
923 | slen = XDR_QUADLEN(namlen); | |
924 | elen = slen + NFS3_ENTRY_BAGGAGE | |
925 | + (plus? NFS3_ENTRYPLUS_BAGGAGE : 0); | |
926 | ||
927 | if (cd->buflen < elen) { | |
928 | cd->common.err = nfserr_toosmall; | |
929 | return -EINVAL; | |
930 | } | |
931 | ||
932 | /* determine which page in rq_respages[] we are currently filling */ | |
afc59400 BF |
933 | for (page = cd->rqstp->rq_respages + 1; |
934 | page < cd->rqstp->rq_next_page; page++) { | |
935 | curr_page_addr = page_address(*page); | |
1da177e4 LT |
936 | |
937 | if (((caddr_t)cd->buffer >= curr_page_addr) && | |
938 | ((caddr_t)cd->buffer < curr_page_addr + PAGE_SIZE)) | |
939 | break; | |
940 | } | |
941 | ||
942 | if ((caddr_t)(cd->buffer + elen) < (curr_page_addr + PAGE_SIZE)) { | |
943 | /* encode entry in current page */ | |
944 | ||
945 | p = encode_entry_baggage(cd, p, name, namlen, ino); | |
946 | ||
8177e6d6 | 947 | if (plus) |
43b0e7ea | 948 | p = encode_entryplus_baggage(cd, p, name, namlen, ino); |
1da177e4 | 949 | num_entry_words = p - cd->buffer; |
afc59400 | 950 | } else if (*(page+1) != NULL) { |
1da177e4 LT |
951 | /* temporarily encode entry into next page, then move back to |
952 | * current and next page in rq_respages[] */ | |
91f07168 | 953 | __be32 *p1, *tmp; |
1da177e4 LT |
954 | int len1, len2; |
955 | ||
956 | /* grab next page for temporary storage of entry */ | |
afc59400 | 957 | p1 = tmp = page_address(*(page+1)); |
1da177e4 LT |
958 | |
959 | p1 = encode_entry_baggage(cd, p1, name, namlen, ino); | |
960 | ||
8177e6d6 | 961 | if (plus) |
43b0e7ea | 962 | p1 = encode_entryplus_baggage(cd, p1, name, namlen, ino); |
1da177e4 LT |
963 | |
964 | /* determine entry word length and lengths to go in pages */ | |
965 | num_entry_words = p1 - tmp; | |
966 | len1 = curr_page_addr + PAGE_SIZE - (caddr_t)cd->buffer; | |
967 | if ((num_entry_words << 2) < len1) { | |
968 | /* the actual number of words in the entry is less | |
969 | * than elen and can still fit in the current page | |
970 | */ | |
971 | memmove(p, tmp, num_entry_words << 2); | |
972 | p += num_entry_words; | |
973 | ||
974 | /* update offset */ | |
975 | cd->offset = cd->buffer + (cd->offset - tmp); | |
976 | } else { | |
977 | unsigned int offset_r = (cd->offset - tmp) << 2; | |
978 | ||
979 | /* update pointer to offset location. | |
980 | * This is a 64bit quantity, so we need to | |
981 | * deal with 3 cases: | |
982 | * - entirely in first page | |
983 | * - entirely in second page | |
984 | * - 4 bytes in each page | |
985 | */ | |
986 | if (offset_r + 8 <= len1) { | |
987 | cd->offset = p + (cd->offset - tmp); | |
988 | } else if (offset_r >= len1) { | |
989 | cd->offset -= len1 >> 2; | |
990 | } else { | |
991 | /* sitting on the fence */ | |
992 | BUG_ON(offset_r != len1 - 4); | |
993 | cd->offset = p + (cd->offset - tmp); | |
994 | cd->offset1 = tmp; | |
995 | } | |
996 | ||
997 | len2 = (num_entry_words << 2) - len1; | |
998 | ||
999 | /* move from temp page to current and next pages */ | |
1000 | memmove(p, tmp, len1); | |
1001 | memmove(tmp, (caddr_t)tmp+len1, len2); | |
1002 | ||
1003 | p = tmp + (len2 >> 2); | |
1004 | } | |
1005 | } | |
1006 | else { | |
1007 | cd->common.err = nfserr_toosmall; | |
1008 | return -EINVAL; | |
1009 | } | |
1010 | ||
1011 | cd->buflen -= num_entry_words; | |
1012 | cd->buffer = p; | |
1013 | cd->common.err = nfs_ok; | |
1014 | return 0; | |
1015 | ||
1016 | } | |
1017 | ||
1018 | int | |
a0ad13ef N |
1019 | nfs3svc_encode_entry(void *cd, const char *name, |
1020 | int namlen, loff_t offset, u64 ino, unsigned int d_type) | |
1da177e4 LT |
1021 | { |
1022 | return encode_entry(cd, name, namlen, offset, ino, d_type, 0); | |
1023 | } | |
1024 | ||
1025 | int | |
a0ad13ef N |
1026 | nfs3svc_encode_entry_plus(void *cd, const char *name, |
1027 | int namlen, loff_t offset, u64 ino, | |
1028 | unsigned int d_type) | |
1da177e4 LT |
1029 | { |
1030 | return encode_entry(cd, name, namlen, offset, ino, d_type, 1); | |
1031 | } | |
1032 | ||
1033 | /* FSSTAT */ | |
1034 | int | |
91f07168 | 1035 | nfs3svc_encode_fsstatres(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
1036 | struct nfsd3_fsstatres *resp) |
1037 | { | |
1038 | struct kstatfs *s = &resp->stats; | |
1039 | u64 bs = s->f_bsize; | |
1040 | ||
1041 | *p++ = xdr_zero; /* no post_op_attr */ | |
1042 | ||
1043 | if (resp->status == 0) { | |
1044 | p = xdr_encode_hyper(p, bs * s->f_blocks); /* total bytes */ | |
1045 | p = xdr_encode_hyper(p, bs * s->f_bfree); /* free bytes */ | |
1046 | p = xdr_encode_hyper(p, bs * s->f_bavail); /* user available bytes */ | |
1047 | p = xdr_encode_hyper(p, s->f_files); /* total inodes */ | |
1048 | p = xdr_encode_hyper(p, s->f_ffree); /* free inodes */ | |
1049 | p = xdr_encode_hyper(p, s->f_ffree); /* user available inodes */ | |
1050 | *p++ = htonl(resp->invarsec); /* mean unchanged time */ | |
1051 | } | |
1052 | return xdr_ressize_check(rqstp, p); | |
1053 | } | |
1054 | ||
1055 | /* FSINFO */ | |
1056 | int | |
91f07168 | 1057 | nfs3svc_encode_fsinfores(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
1058 | struct nfsd3_fsinfores *resp) |
1059 | { | |
1060 | *p++ = xdr_zero; /* no post_op_attr */ | |
1061 | ||
1062 | if (resp->status == 0) { | |
1063 | *p++ = htonl(resp->f_rtmax); | |
1064 | *p++ = htonl(resp->f_rtpref); | |
1065 | *p++ = htonl(resp->f_rtmult); | |
1066 | *p++ = htonl(resp->f_wtmax); | |
1067 | *p++ = htonl(resp->f_wtpref); | |
1068 | *p++ = htonl(resp->f_wtmult); | |
1069 | *p++ = htonl(resp->f_dtpref); | |
1070 | p = xdr_encode_hyper(p, resp->f_maxfilesize); | |
1071 | *p++ = xdr_one; | |
1072 | *p++ = xdr_zero; | |
1073 | *p++ = htonl(resp->f_properties); | |
1074 | } | |
1075 | ||
1076 | return xdr_ressize_check(rqstp, p); | |
1077 | } | |
1078 | ||
1079 | /* PATHCONF */ | |
1080 | int | |
91f07168 | 1081 | nfs3svc_encode_pathconfres(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
1082 | struct nfsd3_pathconfres *resp) |
1083 | { | |
1084 | *p++ = xdr_zero; /* no post_op_attr */ | |
1085 | ||
1086 | if (resp->status == 0) { | |
1087 | *p++ = htonl(resp->p_link_max); | |
1088 | *p++ = htonl(resp->p_name_max); | |
1089 | *p++ = htonl(resp->p_no_trunc); | |
1090 | *p++ = htonl(resp->p_chown_restricted); | |
1091 | *p++ = htonl(resp->p_case_insensitive); | |
1092 | *p++ = htonl(resp->p_case_preserving); | |
1093 | } | |
1094 | ||
1095 | return xdr_ressize_check(rqstp, p); | |
1096 | } | |
1097 | ||
1098 | /* COMMIT */ | |
1099 | int | |
91f07168 | 1100 | nfs3svc_encode_commitres(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
1101 | struct nfsd3_commitres *resp) |
1102 | { | |
b9c0ef85 SK |
1103 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1104 | ||
1da177e4 LT |
1105 | p = encode_wcc_data(rqstp, p, &resp->fh); |
1106 | /* Write verifier */ | |
1107 | if (resp->status == 0) { | |
b9c0ef85 SK |
1108 | *p++ = htonl(nn->nfssvc_boot.tv_sec); |
1109 | *p++ = htonl(nn->nfssvc_boot.tv_usec); | |
1da177e4 LT |
1110 | } |
1111 | return xdr_ressize_check(rqstp, p); | |
1112 | } | |
1113 | ||
1114 | /* | |
1115 | * XDR release functions | |
1116 | */ | |
1117 | int | |
91f07168 | 1118 | nfs3svc_release_fhandle(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
1119 | struct nfsd3_attrstat *resp) |
1120 | { | |
1121 | fh_put(&resp->fh); | |
1122 | return 1; | |
1123 | } | |
1124 | ||
1125 | int | |
91f07168 | 1126 | nfs3svc_release_fhandle2(struct svc_rqst *rqstp, __be32 *p, |
1da177e4 LT |
1127 | struct nfsd3_fhandle_pair *resp) |
1128 | { | |
1129 | fh_put(&resp->fh1); | |
1130 | fh_put(&resp->fh2); | |
1131 | return 1; | |
1132 | } |