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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 | 2 | /* |
1da177e4 LT |
3 | * XDR support for nfsd/protocol version 3. |
4 | * | |
5 | * Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@monad.swb.de> | |
6 | * | |
7 | * 2003-08-09 Jamie Lokier: Use htonl() for nanoseconds, not htons()! | |
8 | */ | |
9 | ||
1da177e4 | 10 | #include <linux/namei.h> |
b9c0ef85 | 11 | #include <linux/sunrpc/svc_xprt.h> |
9a74af21 | 12 | #include "xdr3.h" |
2e8138a2 | 13 | #include "auth.h" |
b9c0ef85 | 14 | #include "netns.h" |
3dadecce | 15 | #include "vfs.h" |
1da177e4 LT |
16 | |
17 | #define NFSDDBG_FACILITY NFSDDBG_XDR | |
18 | ||
1da177e4 LT |
19 | |
20 | /* | |
21 | * Mapping of S_IF* types to NFS file types | |
22 | */ | |
23 | static u32 nfs3_ftypes[] = { | |
24 | NF3NON, NF3FIFO, NF3CHR, NF3BAD, | |
25 | NF3DIR, NF3BAD, NF3BLK, NF3BAD, | |
26 | NF3REG, NF3BAD, NF3LNK, NF3BAD, | |
27 | NF3SOCK, NF3BAD, NF3LNK, NF3BAD, | |
28 | }; | |
29 | ||
30 | /* | |
31 | * XDR functions for basic NFS types | |
32 | */ | |
3ee6f61c | 33 | static __be32 * |
91f07168 | 34 | encode_time3(__be32 *p, struct timespec *time) |
1da177e4 LT |
35 | { |
36 | *p++ = htonl((u32) time->tv_sec); *p++ = htonl(time->tv_nsec); | |
37 | return p; | |
38 | } | |
39 | ||
3ee6f61c | 40 | static __be32 * |
91f07168 | 41 | decode_time3(__be32 *p, struct timespec *time) |
1da177e4 LT |
42 | { |
43 | time->tv_sec = ntohl(*p++); | |
44 | time->tv_nsec = ntohl(*p++); | |
45 | return p; | |
46 | } | |
47 | ||
3ee6f61c | 48 | static __be32 * |
91f07168 | 49 | decode_fh(__be32 *p, struct svc_fh *fhp) |
1da177e4 LT |
50 | { |
51 | unsigned int size; | |
52 | fh_init(fhp, NFS3_FHSIZE); | |
53 | size = ntohl(*p++); | |
54 | if (size > NFS3_FHSIZE) | |
55 | return NULL; | |
56 | ||
57 | memcpy(&fhp->fh_handle.fh_base, p, size); | |
58 | fhp->fh_handle.fh_size = size; | |
59 | return p + XDR_QUADLEN(size); | |
60 | } | |
61 | ||
a257cdd0 | 62 | /* Helper function for NFSv3 ACL code */ |
91f07168 | 63 | __be32 *nfs3svc_decode_fh(__be32 *p, struct svc_fh *fhp) |
a257cdd0 AG |
64 | { |
65 | return decode_fh(p, fhp); | |
66 | } | |
67 | ||
3ee6f61c | 68 | static __be32 * |
91f07168 | 69 | encode_fh(__be32 *p, struct svc_fh *fhp) |
1da177e4 LT |
70 | { |
71 | unsigned int size = fhp->fh_handle.fh_size; | |
72 | *p++ = htonl(size); | |
73 | if (size) p[XDR_QUADLEN(size)-1]=0; | |
74 | memcpy(p, &fhp->fh_handle.fh_base, size); | |
75 | return p + XDR_QUADLEN(size); | |
76 | } | |
77 | ||
78 | /* | |
79 | * Decode a file name and make sure that the path contains | |
80 | * no slashes or null bytes. | |
81 | */ | |
3ee6f61c | 82 | static __be32 * |
ee1a95b3 | 83 | decode_filename(__be32 *p, char **namp, unsigned int *lenp) |
1da177e4 LT |
84 | { |
85 | char *name; | |
ee1a95b3 | 86 | unsigned int i; |
1da177e4 LT |
87 | |
88 | if ((p = xdr_decode_string_inplace(p, namp, lenp, NFS3_MAXNAMLEN)) != NULL) { | |
89 | for (i = 0, name = *namp; i < *lenp; i++, name++) { | |
90 | if (*name == '\0' || *name == '/') | |
91 | return NULL; | |
92 | } | |
93 | } | |
94 | ||
95 | return p; | |
96 | } | |
97 | ||
3ee6f61c | 98 | static __be32 * |
91f07168 | 99 | decode_sattr3(__be32 *p, struct iattr *iap) |
1da177e4 LT |
100 | { |
101 | u32 tmp; | |
102 | ||
103 | iap->ia_valid = 0; | |
104 | ||
105 | if (*p++) { | |
106 | iap->ia_valid |= ATTR_MODE; | |
107 | iap->ia_mode = ntohl(*p++); | |
108 | } | |
109 | if (*p++) { | |
458878a7 EB |
110 | iap->ia_uid = make_kuid(&init_user_ns, ntohl(*p++)); |
111 | if (uid_valid(iap->ia_uid)) | |
112 | iap->ia_valid |= ATTR_UID; | |
1da177e4 LT |
113 | } |
114 | if (*p++) { | |
458878a7 EB |
115 | iap->ia_gid = make_kgid(&init_user_ns, ntohl(*p++)); |
116 | if (gid_valid(iap->ia_gid)) | |
117 | iap->ia_valid |= ATTR_GID; | |
1da177e4 LT |
118 | } |
119 | if (*p++) { | |
120 | u64 newsize; | |
121 | ||
122 | iap->ia_valid |= ATTR_SIZE; | |
123 | p = xdr_decode_hyper(p, &newsize); | |
3c7aa15d | 124 | iap->ia_size = min_t(u64, newsize, NFS_OFFSET_MAX); |
1da177e4 LT |
125 | } |
126 | if ((tmp = ntohl(*p++)) == 1) { /* set to server time */ | |
127 | iap->ia_valid |= ATTR_ATIME; | |
128 | } else if (tmp == 2) { /* set to client time */ | |
129 | iap->ia_valid |= ATTR_ATIME | ATTR_ATIME_SET; | |
130 | iap->ia_atime.tv_sec = ntohl(*p++); | |
131 | iap->ia_atime.tv_nsec = ntohl(*p++); | |
132 | } | |
133 | if ((tmp = ntohl(*p++)) == 1) { /* set to server time */ | |
134 | iap->ia_valid |= ATTR_MTIME; | |
135 | } else if (tmp == 2) { /* set to client time */ | |
136 | iap->ia_valid |= ATTR_MTIME | ATTR_MTIME_SET; | |
137 | iap->ia_mtime.tv_sec = ntohl(*p++); | |
138 | iap->ia_mtime.tv_nsec = ntohl(*p++); | |
139 | } | |
140 | return p; | |
141 | } | |
142 | ||
af6a4e28 N |
143 | static __be32 *encode_fsid(__be32 *p, struct svc_fh *fhp) |
144 | { | |
145 | u64 f; | |
146 | switch(fsid_source(fhp)) { | |
147 | default: | |
148 | case FSIDSOURCE_DEV: | |
149 | p = xdr_encode_hyper(p, (u64)huge_encode_dev | |
fc64005c | 150 | (fhp->fh_dentry->d_sb->s_dev)); |
af6a4e28 N |
151 | break; |
152 | case FSIDSOURCE_FSID: | |
153 | p = xdr_encode_hyper(p, (u64) fhp->fh_export->ex_fsid); | |
154 | break; | |
155 | case FSIDSOURCE_UUID: | |
156 | f = ((u64*)fhp->fh_export->ex_uuid)[0]; | |
157 | f ^= ((u64*)fhp->fh_export->ex_uuid)[1]; | |
158 | p = xdr_encode_hyper(p, f); | |
159 | break; | |
160 | } | |
161 | return p; | |
162 | } | |
163 | ||
3ee6f61c | 164 | static __be32 * |
91f07168 | 165 | encode_fattr3(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp, |
a334de28 | 166 | struct kstat *stat) |
1da177e4 | 167 | { |
a334de28 | 168 | *p++ = htonl(nfs3_ftypes[(stat->mode & S_IFMT) >> 12]); |
6e14b46b | 169 | *p++ = htonl((u32) (stat->mode & S_IALLUGO)); |
a334de28 | 170 | *p++ = htonl((u32) stat->nlink); |
458878a7 EB |
171 | *p++ = htonl((u32) from_kuid(&init_user_ns, stat->uid)); |
172 | *p++ = htonl((u32) from_kgid(&init_user_ns, stat->gid)); | |
a334de28 | 173 | if (S_ISLNK(stat->mode) && stat->size > NFS3_MAXPATHLEN) { |
1da177e4 LT |
174 | p = xdr_encode_hyper(p, (u64) NFS3_MAXPATHLEN); |
175 | } else { | |
a334de28 | 176 | p = xdr_encode_hyper(p, (u64) stat->size); |
1da177e4 | 177 | } |
a334de28 DS |
178 | p = xdr_encode_hyper(p, ((u64)stat->blocks) << 9); |
179 | *p++ = htonl((u32) MAJOR(stat->rdev)); | |
180 | *p++ = htonl((u32) MINOR(stat->rdev)); | |
af6a4e28 | 181 | p = encode_fsid(p, fhp); |
40ee5dc6 | 182 | p = xdr_encode_hyper(p, stat->ino); |
a334de28 | 183 | p = encode_time3(p, &stat->atime); |
40ee5dc6 | 184 | p = encode_time3(p, &stat->mtime); |
a334de28 | 185 | p = encode_time3(p, &stat->ctime); |
1da177e4 LT |
186 | |
187 | return p; | |
188 | } | |
189 | ||
3ee6f61c | 190 | static __be32 * |
91f07168 | 191 | encode_saved_post_attr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp) |
1da177e4 | 192 | { |
1da177e4 LT |
193 | /* Attributes to follow */ |
194 | *p++ = xdr_one; | |
40ee5dc6 | 195 | return encode_fattr3(rqstp, p, fhp, &fhp->fh_post_attr); |
1da177e4 LT |
196 | } |
197 | ||
198 | /* | |
199 | * Encode post-operation attributes. | |
200 | * The inode may be NULL if the call failed because of a stale file | |
201 | * handle. In this case, no attributes are returned. | |
202 | */ | |
91f07168 AV |
203 | static __be32 * |
204 | encode_post_op_attr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp) | |
1da177e4 LT |
205 | { |
206 | struct dentry *dentry = fhp->fh_dentry; | |
2b0143b5 | 207 | if (dentry && d_really_is_positive(dentry)) { |
3dadecce | 208 | __be32 err; |
a334de28 DS |
209 | struct kstat stat; |
210 | ||
3dadecce | 211 | err = fh_getattr(fhp, &stat); |
a334de28 DS |
212 | if (!err) { |
213 | *p++ = xdr_one; /* attributes follow */ | |
2b0143b5 | 214 | lease_get_mtime(d_inode(dentry), &stat.mtime); |
a334de28 DS |
215 | return encode_fattr3(rqstp, p, fhp, &stat); |
216 | } | |
1da177e4 LT |
217 | } |
218 | *p++ = xdr_zero; | |
219 | return p; | |
220 | } | |
221 | ||
a257cdd0 | 222 | /* Helper for NFSv3 ACLs */ |
91f07168 AV |
223 | __be32 * |
224 | nfs3svc_encode_post_op_attr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp) | |
a257cdd0 AG |
225 | { |
226 | return encode_post_op_attr(rqstp, p, fhp); | |
227 | } | |
228 | ||
1da177e4 LT |
229 | /* |
230 | * Enocde weak cache consistency data | |
231 | */ | |
91f07168 AV |
232 | static __be32 * |
233 | encode_wcc_data(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp) | |
1da177e4 LT |
234 | { |
235 | struct dentry *dentry = fhp->fh_dentry; | |
236 | ||
2b0143b5 | 237 | if (dentry && d_really_is_positive(dentry) && fhp->fh_post_saved) { |
1da177e4 LT |
238 | if (fhp->fh_pre_saved) { |
239 | *p++ = xdr_one; | |
240 | p = xdr_encode_hyper(p, (u64) fhp->fh_pre_size); | |
241 | p = encode_time3(p, &fhp->fh_pre_mtime); | |
242 | p = encode_time3(p, &fhp->fh_pre_ctime); | |
243 | } else { | |
244 | *p++ = xdr_zero; | |
245 | } | |
246 | return encode_saved_post_attr(rqstp, p, fhp); | |
247 | } | |
248 | /* no pre- or post-attrs */ | |
249 | *p++ = xdr_zero; | |
250 | return encode_post_op_attr(rqstp, p, fhp); | |
251 | } | |
252 | ||
40ee5dc6 PS |
253 | /* |
254 | * Fill in the post_op attr for the wcc data | |
255 | */ | |
256 | void fill_post_wcc(struct svc_fh *fhp) | |
257 | { | |
3dadecce | 258 | __be32 err; |
40ee5dc6 PS |
259 | |
260 | if (fhp->fh_post_saved) | |
261 | printk("nfsd: inode locked twice during operation.\n"); | |
262 | ||
3dadecce | 263 | err = fh_getattr(fhp, &fhp->fh_post_attr); |
630458e7 | 264 | fhp->fh_post_change = nfsd4_change_attribute(d_inode(fhp->fh_dentry)); |
c1ac3ffc | 265 | if (err) { |
aaf91ec1 | 266 | fhp->fh_post_saved = false; |
c1ac3ffc | 267 | /* Grab the ctime anyway - set_change_info might use it */ |
2b0143b5 | 268 | fhp->fh_post_attr.ctime = d_inode(fhp->fh_dentry)->i_ctime; |
c1ac3ffc | 269 | } else |
aaf91ec1 | 270 | fhp->fh_post_saved = true; |
40ee5dc6 | 271 | } |
1da177e4 LT |
272 | |
273 | /* | |
274 | * XDR decode functions | |
275 | */ | |
276 | int | |
026fec7e | 277 | nfs3svc_decode_fhandle(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 278 | { |
026fec7e CH |
279 | struct nfsd_fhandle *args = rqstp->rq_argp; |
280 | ||
d40aa337 BT |
281 | p = decode_fh(p, &args->fh); |
282 | if (!p) | |
1da177e4 LT |
283 | return 0; |
284 | return xdr_argsize_check(rqstp, p); | |
285 | } | |
286 | ||
287 | int | |
026fec7e | 288 | nfs3svc_decode_sattrargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 289 | { |
026fec7e CH |
290 | struct nfsd3_sattrargs *args = rqstp->rq_argp; |
291 | ||
d40aa337 BT |
292 | p = decode_fh(p, &args->fh); |
293 | if (!p) | |
1da177e4 | 294 | return 0; |
072f62ed | 295 | p = decode_sattr3(p, &args->attrs); |
1da177e4 LT |
296 | |
297 | if ((args->check_guard = ntohl(*p++)) != 0) { | |
298 | struct timespec time; | |
299 | p = decode_time3(p, &time); | |
300 | args->guardtime = time.tv_sec; | |
301 | } | |
302 | ||
303 | return xdr_argsize_check(rqstp, p); | |
304 | } | |
305 | ||
306 | int | |
026fec7e | 307 | nfs3svc_decode_diropargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 308 | { |
026fec7e CH |
309 | struct nfsd3_diropargs *args = rqstp->rq_argp; |
310 | ||
1da177e4 LT |
311 | if (!(p = decode_fh(p, &args->fh)) |
312 | || !(p = decode_filename(p, &args->name, &args->len))) | |
313 | return 0; | |
314 | ||
315 | return xdr_argsize_check(rqstp, p); | |
316 | } | |
317 | ||
318 | int | |
026fec7e | 319 | nfs3svc_decode_accessargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 320 | { |
026fec7e CH |
321 | struct nfsd3_accessargs *args = rqstp->rq_argp; |
322 | ||
d40aa337 BT |
323 | p = decode_fh(p, &args->fh); |
324 | if (!p) | |
1da177e4 LT |
325 | return 0; |
326 | args->access = ntohl(*p++); | |
327 | ||
328 | return xdr_argsize_check(rqstp, p); | |
329 | } | |
330 | ||
331 | int | |
026fec7e | 332 | nfs3svc_decode_readargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 333 | { |
026fec7e | 334 | struct nfsd3_readargs *args = rqstp->rq_argp; |
1da177e4 | 335 | unsigned int len; |
afc59400 | 336 | int v; |
7adae489 | 337 | u32 max_blocksize = svc_max_payload(rqstp); |
1da177e4 | 338 | |
d40aa337 BT |
339 | p = decode_fh(p, &args->fh); |
340 | if (!p) | |
1da177e4 | 341 | return 0; |
072f62ed | 342 | p = xdr_decode_hyper(p, &args->offset); |
51f56777 | 343 | |
9512a16b | 344 | args->count = ntohl(*p++); |
3c7aa15d | 345 | len = min(args->count, max_blocksize); |
1da177e4 LT |
346 | |
347 | /* set up the kvec */ | |
348 | v=0; | |
349 | while (len > 0) { | |
afc59400 BF |
350 | struct page *p = *(rqstp->rq_next_page++); |
351 | ||
352 | rqstp->rq_vec[v].iov_base = page_address(p); | |
3c7aa15d | 353 | rqstp->rq_vec[v].iov_len = min_t(unsigned int, len, PAGE_SIZE); |
3cc03b16 | 354 | len -= rqstp->rq_vec[v].iov_len; |
1da177e4 LT |
355 | v++; |
356 | } | |
357 | args->vlen = v; | |
9512a16b | 358 | return xdr_argsize_check(rqstp, p); |
1da177e4 LT |
359 | } |
360 | ||
361 | int | |
026fec7e | 362 | nfs3svc_decode_writeargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 363 | { |
026fec7e | 364 | struct nfsd3_writeargs *args = rqstp->rq_argp; |
f34b9568 | 365 | unsigned int len, v, hdr, dlen; |
7adae489 | 366 | u32 max_blocksize = svc_max_payload(rqstp); |
db44bac4 BF |
367 | struct kvec *head = rqstp->rq_arg.head; |
368 | struct kvec *tail = rqstp->rq_arg.tail; | |
1da177e4 | 369 | |
d40aa337 BT |
370 | p = decode_fh(p, &args->fh); |
371 | if (!p) | |
1da177e4 | 372 | return 0; |
072f62ed | 373 | p = xdr_decode_hyper(p, &args->offset); |
1da177e4 LT |
374 | |
375 | args->count = ntohl(*p++); | |
376 | args->stable = ntohl(*p++); | |
377 | len = args->len = ntohl(*p++); | |
13bf9fbf BF |
378 | if ((void *)p > head->iov_base + head->iov_len) |
379 | return 0; | |
f34b9568 PS |
380 | /* |
381 | * The count must equal the amount of data passed. | |
382 | */ | |
383 | if (args->count != args->len) | |
384 | return 0; | |
1da177e4 | 385 | |
f34b9568 PS |
386 | /* |
387 | * Check to make sure that we got the right number of | |
388 | * bytes. | |
f34b9568 | 389 | */ |
db44bac4 BF |
390 | hdr = (void*)p - head->iov_base; |
391 | dlen = head->iov_len + rqstp->rq_arg.page_len + tail->iov_len - hdr; | |
f34b9568 PS |
392 | /* |
393 | * Round the length of the data which was specified up to | |
394 | * the next multiple of XDR units and then compare that | |
395 | * against the length which was actually received. | |
ba67a39e N |
396 | * Note that when RPCSEC/GSS (for example) is used, the |
397 | * data buffer can be padded so dlen might be larger | |
398 | * than required. It must never be smaller. | |
f34b9568 | 399 | */ |
ba67a39e | 400 | if (dlen < XDR_QUADLEN(len)*4) |
1da177e4 LT |
401 | return 0; |
402 | ||
f34b9568 PS |
403 | if (args->count > max_blocksize) { |
404 | args->count = max_blocksize; | |
405 | len = args->len = max_blocksize; | |
406 | } | |
3cc03b16 | 407 | rqstp->rq_vec[0].iov_base = (void*)p; |
db44bac4 | 408 | rqstp->rq_vec[0].iov_len = head->iov_len - hdr; |
f34b9568 | 409 | v = 0; |
3cc03b16 N |
410 | while (len > rqstp->rq_vec[v].iov_len) { |
411 | len -= rqstp->rq_vec[v].iov_len; | |
1da177e4 | 412 | v++; |
3cc03b16 N |
413 | rqstp->rq_vec[v].iov_base = page_address(rqstp->rq_pages[v]); |
414 | rqstp->rq_vec[v].iov_len = PAGE_SIZE; | |
1da177e4 | 415 | } |
3cc03b16 | 416 | rqstp->rq_vec[v].iov_len = len; |
f34b9568 PS |
417 | args->vlen = v + 1; |
418 | return 1; | |
1da177e4 LT |
419 | } |
420 | ||
421 | int | |
026fec7e | 422 | nfs3svc_decode_createargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 423 | { |
026fec7e CH |
424 | struct nfsd3_createargs *args = rqstp->rq_argp; |
425 | ||
1da177e4 LT |
426 | if (!(p = decode_fh(p, &args->fh)) |
427 | || !(p = decode_filename(p, &args->name, &args->len))) | |
428 | return 0; | |
429 | ||
430 | switch (args->createmode = ntohl(*p++)) { | |
431 | case NFS3_CREATE_UNCHECKED: | |
432 | case NFS3_CREATE_GUARDED: | |
072f62ed | 433 | p = decode_sattr3(p, &args->attrs); |
1da177e4 LT |
434 | break; |
435 | case NFS3_CREATE_EXCLUSIVE: | |
436 | args->verf = p; | |
437 | p += 2; | |
438 | break; | |
439 | default: | |
440 | return 0; | |
441 | } | |
442 | ||
443 | return xdr_argsize_check(rqstp, p); | |
444 | } | |
026fec7e | 445 | |
1da177e4 | 446 | int |
026fec7e | 447 | nfs3svc_decode_mkdirargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 448 | { |
026fec7e CH |
449 | struct nfsd3_createargs *args = rqstp->rq_argp; |
450 | ||
072f62ed N |
451 | if (!(p = decode_fh(p, &args->fh)) || |
452 | !(p = decode_filename(p, &args->name, &args->len))) | |
1da177e4 | 453 | return 0; |
072f62ed | 454 | p = decode_sattr3(p, &args->attrs); |
1da177e4 LT |
455 | |
456 | return xdr_argsize_check(rqstp, p); | |
457 | } | |
458 | ||
459 | int | |
026fec7e | 460 | nfs3svc_decode_symlinkargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 461 | { |
026fec7e | 462 | struct nfsd3_symlinkargs *args = rqstp->rq_argp; |
a628f667 | 463 | unsigned int len, avail; |
1da177e4 LT |
464 | char *old, *new; |
465 | struct kvec *vec; | |
466 | ||
072f62ed N |
467 | if (!(p = decode_fh(p, &args->ffh)) || |
468 | !(p = decode_filename(p, &args->fname, &args->flen)) | |
1da177e4 LT |
469 | ) |
470 | return 0; | |
072f62ed N |
471 | p = decode_sattr3(p, &args->attrs); |
472 | ||
1da177e4 LT |
473 | /* now decode the pathname, which might be larger than the first page. |
474 | * As we have to check for nul's anyway, we copy it into a new page | |
475 | * This page appears in the rq_res.pages list, but as pages_len is always | |
476 | * 0, it won't get in the way | |
477 | */ | |
1da177e4 LT |
478 | len = ntohl(*p++); |
479 | if (len == 0 || len > NFS3_MAXPATHLEN || len >= PAGE_SIZE) | |
480 | return 0; | |
afc59400 | 481 | args->tname = new = page_address(*(rqstp->rq_next_page++)); |
1da177e4 LT |
482 | args->tlen = len; |
483 | /* first copy and check from the first page */ | |
484 | old = (char*)p; | |
485 | vec = &rqstp->rq_arg.head[0]; | |
13bf9fbf BF |
486 | if ((void *)old > vec->iov_base + vec->iov_len) |
487 | return 0; | |
1da177e4 LT |
488 | avail = vec->iov_len - (old - (char*)vec->iov_base); |
489 | while (len && avail && *old) { | |
490 | *new++ = *old++; | |
491 | len--; | |
492 | avail--; | |
493 | } | |
494 | /* now copy next page if there is one */ | |
495 | if (len && !avail && rqstp->rq_arg.page_len) { | |
3c7aa15d | 496 | avail = min_t(unsigned int, rqstp->rq_arg.page_len, PAGE_SIZE); |
1da177e4 LT |
497 | old = page_address(rqstp->rq_arg.pages[0]); |
498 | } | |
499 | while (len && avail && *old) { | |
500 | *new++ = *old++; | |
501 | len--; | |
502 | avail--; | |
503 | } | |
504 | *new = '\0'; | |
505 | if (len) | |
506 | return 0; | |
507 | ||
508 | return 1; | |
509 | } | |
510 | ||
511 | int | |
026fec7e | 512 | nfs3svc_decode_mknodargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 513 | { |
026fec7e CH |
514 | struct nfsd3_mknodargs *args = rqstp->rq_argp; |
515 | ||
1da177e4 LT |
516 | if (!(p = decode_fh(p, &args->fh)) |
517 | || !(p = decode_filename(p, &args->name, &args->len))) | |
518 | return 0; | |
519 | ||
520 | args->ftype = ntohl(*p++); | |
521 | ||
522 | if (args->ftype == NF3BLK || args->ftype == NF3CHR | |
072f62ed N |
523 | || args->ftype == NF3SOCK || args->ftype == NF3FIFO) |
524 | p = decode_sattr3(p, &args->attrs); | |
1da177e4 LT |
525 | |
526 | if (args->ftype == NF3BLK || args->ftype == NF3CHR) { | |
527 | args->major = ntohl(*p++); | |
528 | args->minor = ntohl(*p++); | |
529 | } | |
530 | ||
531 | return xdr_argsize_check(rqstp, p); | |
532 | } | |
533 | ||
534 | int | |
026fec7e | 535 | nfs3svc_decode_renameargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 536 | { |
026fec7e CH |
537 | struct nfsd3_renameargs *args = rqstp->rq_argp; |
538 | ||
1da177e4 LT |
539 | if (!(p = decode_fh(p, &args->ffh)) |
540 | || !(p = decode_filename(p, &args->fname, &args->flen)) | |
541 | || !(p = decode_fh(p, &args->tfh)) | |
542 | || !(p = decode_filename(p, &args->tname, &args->tlen))) | |
543 | return 0; | |
544 | ||
545 | return xdr_argsize_check(rqstp, p); | |
546 | } | |
547 | ||
548 | int | |
026fec7e | 549 | nfs3svc_decode_readlinkargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 550 | { |
026fec7e CH |
551 | struct nfsd3_readlinkargs *args = rqstp->rq_argp; |
552 | ||
d40aa337 BT |
553 | p = decode_fh(p, &args->fh); |
554 | if (!p) | |
1da177e4 | 555 | return 0; |
afc59400 | 556 | args->buffer = page_address(*(rqstp->rq_next_page++)); |
1da177e4 | 557 | |
9512a16b | 558 | return xdr_argsize_check(rqstp, p); |
1da177e4 LT |
559 | } |
560 | ||
561 | int | |
026fec7e | 562 | nfs3svc_decode_linkargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 563 | { |
026fec7e CH |
564 | struct nfsd3_linkargs *args = rqstp->rq_argp; |
565 | ||
1da177e4 LT |
566 | if (!(p = decode_fh(p, &args->ffh)) |
567 | || !(p = decode_fh(p, &args->tfh)) | |
568 | || !(p = decode_filename(p, &args->tname, &args->tlen))) | |
569 | return 0; | |
570 | ||
571 | return xdr_argsize_check(rqstp, p); | |
572 | } | |
573 | ||
574 | int | |
026fec7e | 575 | nfs3svc_decode_readdirargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 576 | { |
026fec7e | 577 | struct nfsd3_readdirargs *args = rqstp->rq_argp; |
d40aa337 BT |
578 | p = decode_fh(p, &args->fh); |
579 | if (!p) | |
1da177e4 LT |
580 | return 0; |
581 | p = xdr_decode_hyper(p, &args->cookie); | |
582 | args->verf = p; p += 2; | |
583 | args->dircount = ~0; | |
584 | args->count = ntohl(*p++); | |
3c7aa15d | 585 | args->count = min_t(u32, args->count, PAGE_SIZE); |
afc59400 | 586 | args->buffer = page_address(*(rqstp->rq_next_page++)); |
1da177e4 | 587 | |
9512a16b | 588 | return xdr_argsize_check(rqstp, p); |
1da177e4 LT |
589 | } |
590 | ||
591 | int | |
026fec7e | 592 | nfs3svc_decode_readdirplusargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 593 | { |
026fec7e | 594 | struct nfsd3_readdirargs *args = rqstp->rq_argp; |
afc59400 | 595 | int len; |
7adae489 | 596 | u32 max_blocksize = svc_max_payload(rqstp); |
1da177e4 | 597 | |
d40aa337 BT |
598 | p = decode_fh(p, &args->fh); |
599 | if (!p) | |
1da177e4 LT |
600 | return 0; |
601 | p = xdr_decode_hyper(p, &args->cookie); | |
602 | args->verf = p; p += 2; | |
603 | args->dircount = ntohl(*p++); | |
604 | args->count = ntohl(*p++); | |
605 | ||
3c7aa15d | 606 | len = args->count = min(args->count, max_blocksize); |
1da177e4 | 607 | while (len > 0) { |
afc59400 | 608 | struct page *p = *(rqstp->rq_next_page++); |
1da177e4 | 609 | if (!args->buffer) |
afc59400 | 610 | args->buffer = page_address(p); |
1da177e4 LT |
611 | len -= PAGE_SIZE; |
612 | } | |
9512a16b BF |
613 | |
614 | return xdr_argsize_check(rqstp, p); | |
1da177e4 LT |
615 | } |
616 | ||
617 | int | |
026fec7e | 618 | nfs3svc_decode_commitargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 619 | { |
026fec7e | 620 | struct nfsd3_commitargs *args = rqstp->rq_argp; |
d40aa337 BT |
621 | p = decode_fh(p, &args->fh); |
622 | if (!p) | |
1da177e4 LT |
623 | return 0; |
624 | p = xdr_decode_hyper(p, &args->offset); | |
625 | args->count = ntohl(*p++); | |
626 | ||
627 | return xdr_argsize_check(rqstp, p); | |
628 | } | |
629 | ||
630 | /* | |
631 | * XDR encode functions | |
632 | */ | |
633 | /* | |
634 | * There must be an encoding function for void results so svc_process | |
635 | * will work properly. | |
636 | */ | |
637 | int | |
63f8de37 | 638 | nfs3svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 LT |
639 | { |
640 | return xdr_ressize_check(rqstp, p); | |
641 | } | |
642 | ||
643 | /* GETATTR */ | |
644 | int | |
63f8de37 | 645 | nfs3svc_encode_attrstat(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 646 | { |
63f8de37 CH |
647 | struct nfsd3_attrstat *resp = rqstp->rq_resp; |
648 | ||
40ee5dc6 | 649 | if (resp->status == 0) { |
2b0143b5 | 650 | lease_get_mtime(d_inode(resp->fh.fh_dentry), |
40ee5dc6 | 651 | &resp->stat.mtime); |
a334de28 | 652 | p = encode_fattr3(rqstp, p, &resp->fh, &resp->stat); |
40ee5dc6 | 653 | } |
1da177e4 LT |
654 | return xdr_ressize_check(rqstp, p); |
655 | } | |
656 | ||
657 | /* SETATTR, REMOVE, RMDIR */ | |
658 | int | |
63f8de37 | 659 | nfs3svc_encode_wccstat(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 660 | { |
63f8de37 CH |
661 | struct nfsd3_attrstat *resp = rqstp->rq_resp; |
662 | ||
1da177e4 LT |
663 | p = encode_wcc_data(rqstp, p, &resp->fh); |
664 | return xdr_ressize_check(rqstp, p); | |
665 | } | |
666 | ||
667 | /* LOOKUP */ | |
668 | int | |
63f8de37 | 669 | nfs3svc_encode_diropres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 670 | { |
63f8de37 CH |
671 | struct nfsd3_diropres *resp = rqstp->rq_resp; |
672 | ||
1da177e4 LT |
673 | if (resp->status == 0) { |
674 | p = encode_fh(p, &resp->fh); | |
675 | p = encode_post_op_attr(rqstp, p, &resp->fh); | |
676 | } | |
677 | p = encode_post_op_attr(rqstp, p, &resp->dirfh); | |
678 | return xdr_ressize_check(rqstp, p); | |
679 | } | |
680 | ||
681 | /* ACCESS */ | |
682 | int | |
63f8de37 | 683 | nfs3svc_encode_accessres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 684 | { |
63f8de37 CH |
685 | struct nfsd3_accessres *resp = rqstp->rq_resp; |
686 | ||
1da177e4 LT |
687 | p = encode_post_op_attr(rqstp, p, &resp->fh); |
688 | if (resp->status == 0) | |
689 | *p++ = htonl(resp->access); | |
690 | return xdr_ressize_check(rqstp, p); | |
691 | } | |
692 | ||
693 | /* READLINK */ | |
694 | int | |
63f8de37 | 695 | nfs3svc_encode_readlinkres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 696 | { |
63f8de37 CH |
697 | struct nfsd3_readlinkres *resp = rqstp->rq_resp; |
698 | ||
1da177e4 LT |
699 | p = encode_post_op_attr(rqstp, p, &resp->fh); |
700 | if (resp->status == 0) { | |
701 | *p++ = htonl(resp->len); | |
702 | xdr_ressize_check(rqstp, p); | |
703 | rqstp->rq_res.page_len = resp->len; | |
704 | if (resp->len & 3) { | |
705 | /* need to pad the tail */ | |
1da177e4 LT |
706 | rqstp->rq_res.tail[0].iov_base = p; |
707 | *p = 0; | |
708 | rqstp->rq_res.tail[0].iov_len = 4 - (resp->len&3); | |
709 | } | |
710 | return 1; | |
711 | } else | |
712 | return xdr_ressize_check(rqstp, p); | |
713 | } | |
714 | ||
715 | /* READ */ | |
716 | int | |
63f8de37 | 717 | nfs3svc_encode_readres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 718 | { |
63f8de37 CH |
719 | struct nfsd3_readres *resp = rqstp->rq_resp; |
720 | ||
1da177e4 LT |
721 | p = encode_post_op_attr(rqstp, p, &resp->fh); |
722 | if (resp->status == 0) { | |
723 | *p++ = htonl(resp->count); | |
724 | *p++ = htonl(resp->eof); | |
725 | *p++ = htonl(resp->count); /* xdr opaque count */ | |
726 | xdr_ressize_check(rqstp, p); | |
25985edc | 727 | /* now update rqstp->rq_res to reflect data as well */ |
1da177e4 LT |
728 | rqstp->rq_res.page_len = resp->count; |
729 | if (resp->count & 3) { | |
730 | /* need to pad the tail */ | |
1da177e4 LT |
731 | rqstp->rq_res.tail[0].iov_base = p; |
732 | *p = 0; | |
733 | rqstp->rq_res.tail[0].iov_len = 4 - (resp->count & 3); | |
734 | } | |
735 | return 1; | |
736 | } else | |
737 | return xdr_ressize_check(rqstp, p); | |
738 | } | |
739 | ||
740 | /* WRITE */ | |
741 | int | |
63f8de37 | 742 | nfs3svc_encode_writeres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 743 | { |
63f8de37 | 744 | struct nfsd3_writeres *resp = rqstp->rq_resp; |
b9c0ef85 SK |
745 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
746 | ||
1da177e4 LT |
747 | p = encode_wcc_data(rqstp, p, &resp->fh); |
748 | if (resp->status == 0) { | |
749 | *p++ = htonl(resp->count); | |
750 | *p++ = htonl(resp->committed); | |
256a89fa AB |
751 | /* unique identifier, y2038 overflow can be ignored */ |
752 | *p++ = htonl((u32)nn->nfssvc_boot.tv_sec); | |
753 | *p++ = htonl(nn->nfssvc_boot.tv_nsec); | |
1da177e4 LT |
754 | } |
755 | return xdr_ressize_check(rqstp, p); | |
756 | } | |
757 | ||
758 | /* CREATE, MKDIR, SYMLINK, MKNOD */ | |
759 | int | |
63f8de37 | 760 | nfs3svc_encode_createres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 761 | { |
63f8de37 CH |
762 | struct nfsd3_diropres *resp = rqstp->rq_resp; |
763 | ||
1da177e4 LT |
764 | if (resp->status == 0) { |
765 | *p++ = xdr_one; | |
766 | p = encode_fh(p, &resp->fh); | |
767 | p = encode_post_op_attr(rqstp, p, &resp->fh); | |
768 | } | |
769 | p = encode_wcc_data(rqstp, p, &resp->dirfh); | |
770 | return xdr_ressize_check(rqstp, p); | |
771 | } | |
772 | ||
773 | /* RENAME */ | |
774 | int | |
63f8de37 | 775 | nfs3svc_encode_renameres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 776 | { |
63f8de37 CH |
777 | struct nfsd3_renameres *resp = rqstp->rq_resp; |
778 | ||
1da177e4 LT |
779 | p = encode_wcc_data(rqstp, p, &resp->ffh); |
780 | p = encode_wcc_data(rqstp, p, &resp->tfh); | |
781 | return xdr_ressize_check(rqstp, p); | |
782 | } | |
783 | ||
784 | /* LINK */ | |
785 | int | |
63f8de37 | 786 | nfs3svc_encode_linkres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 787 | { |
63f8de37 CH |
788 | struct nfsd3_linkres *resp = rqstp->rq_resp; |
789 | ||
1da177e4 LT |
790 | p = encode_post_op_attr(rqstp, p, &resp->fh); |
791 | p = encode_wcc_data(rqstp, p, &resp->tfh); | |
792 | return xdr_ressize_check(rqstp, p); | |
793 | } | |
794 | ||
795 | /* READDIR */ | |
796 | int | |
63f8de37 | 797 | nfs3svc_encode_readdirres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 798 | { |
63f8de37 CH |
799 | struct nfsd3_readdirres *resp = rqstp->rq_resp; |
800 | ||
1da177e4 LT |
801 | p = encode_post_op_attr(rqstp, p, &resp->fh); |
802 | ||
803 | if (resp->status == 0) { | |
804 | /* stupid readdir cookie */ | |
805 | memcpy(p, resp->verf, 8); p += 2; | |
806 | xdr_ressize_check(rqstp, p); | |
807 | if (rqstp->rq_res.head[0].iov_len + (2<<2) > PAGE_SIZE) | |
808 | return 1; /*No room for trailer */ | |
809 | rqstp->rq_res.page_len = (resp->count) << 2; | |
810 | ||
811 | /* add the 'tail' to the end of the 'head' page - page 0. */ | |
1da177e4 LT |
812 | rqstp->rq_res.tail[0].iov_base = p; |
813 | *p++ = 0; /* no more entries */ | |
814 | *p++ = htonl(resp->common.err == nfserr_eof); | |
815 | rqstp->rq_res.tail[0].iov_len = 2<<2; | |
816 | return 1; | |
817 | } else | |
818 | return xdr_ressize_check(rqstp, p); | |
819 | } | |
820 | ||
3ee6f61c | 821 | static __be32 * |
91f07168 | 822 | encode_entry_baggage(struct nfsd3_readdirres *cd, __be32 *p, const char *name, |
40ee5dc6 | 823 | int namlen, u64 ino) |
1da177e4 LT |
824 | { |
825 | *p++ = xdr_one; /* mark entry present */ | |
826 | p = xdr_encode_hyper(p, ino); /* file id */ | |
827 | p = xdr_encode_array(p, name, namlen);/* name length & name */ | |
828 | ||
829 | cd->offset = p; /* remember pointer */ | |
830 | p = xdr_encode_hyper(p, NFS_OFFSET_MAX);/* offset of next entry */ | |
831 | ||
832 | return p; | |
833 | } | |
834 | ||
efe39651 | 835 | static __be32 |
1da177e4 | 836 | compose_entry_fh(struct nfsd3_readdirres *cd, struct svc_fh *fhp, |
43b0e7ea | 837 | const char *name, int namlen, u64 ino) |
1da177e4 LT |
838 | { |
839 | struct svc_export *exp; | |
840 | struct dentry *dparent, *dchild; | |
efe39651 | 841 | __be32 rv = nfserr_noent; |
1da177e4 LT |
842 | |
843 | dparent = cd->fh.fh_dentry; | |
844 | exp = cd->fh.fh_export; | |
845 | ||
1da177e4 LT |
846 | if (isdotent(name, namlen)) { |
847 | if (namlen == 2) { | |
848 | dchild = dget_parent(dparent); | |
efe39651 AV |
849 | /* filesystem root - cannot return filehandle for ".." */ |
850 | if (dchild == dparent) | |
851 | goto out; | |
1da177e4 LT |
852 | } else |
853 | dchild = dget(dparent); | |
854 | } else | |
bbddca8e | 855 | dchild = lookup_one_len_unlocked(name, dparent, namlen); |
1da177e4 | 856 | if (IS_ERR(dchild)) |
efe39651 | 857 | return rv; |
8177e6d6 BF |
858 | if (d_mountpoint(dchild)) |
859 | goto out; | |
2b0143b5 | 860 | if (d_really_is_negative(dchild)) |
8177e6d6 | 861 | goto out; |
43b0e7ea N |
862 | if (dchild->d_inode->i_ino != ino) |
863 | goto out; | |
efe39651 | 864 | rv = fh_compose(fhp, exp, dchild, &cd->fh); |
8177e6d6 | 865 | out: |
1da177e4 LT |
866 | dput(dchild); |
867 | return rv; | |
868 | } | |
869 | ||
43b0e7ea | 870 | static __be32 *encode_entryplus_baggage(struct nfsd3_readdirres *cd, __be32 *p, const char *name, int namlen, u64 ino) |
8177e6d6 | 871 | { |
068c34c0 | 872 | struct svc_fh *fh = &cd->scratch; |
efe39651 | 873 | __be32 err; |
8177e6d6 | 874 | |
068c34c0 | 875 | fh_init(fh, NFS3_FHSIZE); |
43b0e7ea | 876 | err = compose_entry_fh(cd, fh, name, namlen, ino); |
8177e6d6 BF |
877 | if (err) { |
878 | *p++ = 0; | |
879 | *p++ = 0; | |
aed100fa | 880 | goto out; |
8177e6d6 | 881 | } |
068c34c0 | 882 | p = encode_post_op_attr(cd->rqstp, p, fh); |
8177e6d6 | 883 | *p++ = xdr_one; /* yes, a file handle follows */ |
068c34c0 | 884 | p = encode_fh(p, fh); |
aed100fa | 885 | out: |
068c34c0 | 886 | fh_put(fh); |
8177e6d6 BF |
887 | return p; |
888 | } | |
889 | ||
1da177e4 LT |
890 | /* |
891 | * Encode a directory entry. This one works for both normal readdir | |
892 | * and readdirplus. | |
893 | * The normal readdir reply requires 2 (fileid) + 1 (stringlen) | |
894 | * + string + 2 (cookie) + 1 (next) words, i.e. 6 + strlen. | |
895 | * | |
896 | * The readdirplus baggage is 1+21 words for post_op_attr, plus the | |
897 | * file handle. | |
898 | */ | |
899 | ||
900 | #define NFS3_ENTRY_BAGGAGE (2 + 1 + 2 + 1) | |
901 | #define NFS3_ENTRYPLUS_BAGGAGE (1 + 21 + 1 + (NFS3_FHSIZE >> 2)) | |
902 | static int | |
598b9a56 | 903 | encode_entry(struct readdir_cd *ccd, const char *name, int namlen, |
40ee5dc6 | 904 | loff_t offset, u64 ino, unsigned int d_type, int plus) |
1da177e4 LT |
905 | { |
906 | struct nfsd3_readdirres *cd = container_of(ccd, struct nfsd3_readdirres, | |
907 | common); | |
91f07168 | 908 | __be32 *p = cd->buffer; |
1da177e4 | 909 | caddr_t curr_page_addr = NULL; |
afc59400 | 910 | struct page ** page; |
1da177e4 LT |
911 | int slen; /* string (name) length */ |
912 | int elen; /* estimated entry length in words */ | |
913 | int num_entry_words = 0; /* actual number of words */ | |
914 | ||
915 | if (cd->offset) { | |
916 | u64 offset64 = offset; | |
917 | ||
918 | if (unlikely(cd->offset1)) { | |
919 | /* we ended up with offset on a page boundary */ | |
920 | *cd->offset = htonl(offset64 >> 32); | |
921 | *cd->offset1 = htonl(offset64 & 0xffffffff); | |
922 | cd->offset1 = NULL; | |
923 | } else { | |
598b9a56 | 924 | xdr_encode_hyper(cd->offset, offset64); |
1da177e4 LT |
925 | } |
926 | } | |
927 | ||
928 | /* | |
929 | dprintk("encode_entry(%.*s @%ld%s)\n", | |
930 | namlen, name, (long) offset, plus? " plus" : ""); | |
931 | */ | |
932 | ||
933 | /* truncate filename if too long */ | |
3c7aa15d | 934 | namlen = min(namlen, NFS3_MAXNAMLEN); |
1da177e4 LT |
935 | |
936 | slen = XDR_QUADLEN(namlen); | |
937 | elen = slen + NFS3_ENTRY_BAGGAGE | |
938 | + (plus? NFS3_ENTRYPLUS_BAGGAGE : 0); | |
939 | ||
940 | if (cd->buflen < elen) { | |
941 | cd->common.err = nfserr_toosmall; | |
942 | return -EINVAL; | |
943 | } | |
944 | ||
945 | /* determine which page in rq_respages[] we are currently filling */ | |
afc59400 BF |
946 | for (page = cd->rqstp->rq_respages + 1; |
947 | page < cd->rqstp->rq_next_page; page++) { | |
948 | curr_page_addr = page_address(*page); | |
1da177e4 LT |
949 | |
950 | if (((caddr_t)cd->buffer >= curr_page_addr) && | |
951 | ((caddr_t)cd->buffer < curr_page_addr + PAGE_SIZE)) | |
952 | break; | |
953 | } | |
954 | ||
955 | if ((caddr_t)(cd->buffer + elen) < (curr_page_addr + PAGE_SIZE)) { | |
956 | /* encode entry in current page */ | |
957 | ||
958 | p = encode_entry_baggage(cd, p, name, namlen, ino); | |
959 | ||
8177e6d6 | 960 | if (plus) |
43b0e7ea | 961 | p = encode_entryplus_baggage(cd, p, name, namlen, ino); |
1da177e4 | 962 | num_entry_words = p - cd->buffer; |
afc59400 | 963 | } else if (*(page+1) != NULL) { |
1da177e4 LT |
964 | /* temporarily encode entry into next page, then move back to |
965 | * current and next page in rq_respages[] */ | |
91f07168 | 966 | __be32 *p1, *tmp; |
1da177e4 LT |
967 | int len1, len2; |
968 | ||
969 | /* grab next page for temporary storage of entry */ | |
afc59400 | 970 | p1 = tmp = page_address(*(page+1)); |
1da177e4 LT |
971 | |
972 | p1 = encode_entry_baggage(cd, p1, name, namlen, ino); | |
973 | ||
8177e6d6 | 974 | if (plus) |
43b0e7ea | 975 | p1 = encode_entryplus_baggage(cd, p1, name, namlen, ino); |
1da177e4 LT |
976 | |
977 | /* determine entry word length and lengths to go in pages */ | |
978 | num_entry_words = p1 - tmp; | |
979 | len1 = curr_page_addr + PAGE_SIZE - (caddr_t)cd->buffer; | |
980 | if ((num_entry_words << 2) < len1) { | |
981 | /* the actual number of words in the entry is less | |
982 | * than elen and can still fit in the current page | |
983 | */ | |
984 | memmove(p, tmp, num_entry_words << 2); | |
985 | p += num_entry_words; | |
986 | ||
987 | /* update offset */ | |
988 | cd->offset = cd->buffer + (cd->offset - tmp); | |
989 | } else { | |
990 | unsigned int offset_r = (cd->offset - tmp) << 2; | |
991 | ||
992 | /* update pointer to offset location. | |
993 | * This is a 64bit quantity, so we need to | |
994 | * deal with 3 cases: | |
995 | * - entirely in first page | |
996 | * - entirely in second page | |
997 | * - 4 bytes in each page | |
998 | */ | |
999 | if (offset_r + 8 <= len1) { | |
1000 | cd->offset = p + (cd->offset - tmp); | |
1001 | } else if (offset_r >= len1) { | |
1002 | cd->offset -= len1 >> 2; | |
1003 | } else { | |
1004 | /* sitting on the fence */ | |
1005 | BUG_ON(offset_r != len1 - 4); | |
1006 | cd->offset = p + (cd->offset - tmp); | |
1007 | cd->offset1 = tmp; | |
1008 | } | |
1009 | ||
1010 | len2 = (num_entry_words << 2) - len1; | |
1011 | ||
1012 | /* move from temp page to current and next pages */ | |
1013 | memmove(p, tmp, len1); | |
1014 | memmove(tmp, (caddr_t)tmp+len1, len2); | |
1015 | ||
1016 | p = tmp + (len2 >> 2); | |
1017 | } | |
1018 | } | |
1019 | else { | |
1020 | cd->common.err = nfserr_toosmall; | |
1021 | return -EINVAL; | |
1022 | } | |
1023 | ||
1024 | cd->buflen -= num_entry_words; | |
1025 | cd->buffer = p; | |
1026 | cd->common.err = nfs_ok; | |
1027 | return 0; | |
1028 | ||
1029 | } | |
1030 | ||
1031 | int | |
a0ad13ef N |
1032 | nfs3svc_encode_entry(void *cd, const char *name, |
1033 | int namlen, loff_t offset, u64 ino, unsigned int d_type) | |
1da177e4 LT |
1034 | { |
1035 | return encode_entry(cd, name, namlen, offset, ino, d_type, 0); | |
1036 | } | |
1037 | ||
1038 | int | |
a0ad13ef N |
1039 | nfs3svc_encode_entry_plus(void *cd, const char *name, |
1040 | int namlen, loff_t offset, u64 ino, | |
1041 | unsigned int d_type) | |
1da177e4 LT |
1042 | { |
1043 | return encode_entry(cd, name, namlen, offset, ino, d_type, 1); | |
1044 | } | |
1045 | ||
1046 | /* FSSTAT */ | |
1047 | int | |
63f8de37 | 1048 | nfs3svc_encode_fsstatres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 1049 | { |
63f8de37 | 1050 | struct nfsd3_fsstatres *resp = rqstp->rq_resp; |
1da177e4 LT |
1051 | struct kstatfs *s = &resp->stats; |
1052 | u64 bs = s->f_bsize; | |
1053 | ||
1054 | *p++ = xdr_zero; /* no post_op_attr */ | |
1055 | ||
1056 | if (resp->status == 0) { | |
1057 | p = xdr_encode_hyper(p, bs * s->f_blocks); /* total bytes */ | |
1058 | p = xdr_encode_hyper(p, bs * s->f_bfree); /* free bytes */ | |
1059 | p = xdr_encode_hyper(p, bs * s->f_bavail); /* user available bytes */ | |
1060 | p = xdr_encode_hyper(p, s->f_files); /* total inodes */ | |
1061 | p = xdr_encode_hyper(p, s->f_ffree); /* free inodes */ | |
1062 | p = xdr_encode_hyper(p, s->f_ffree); /* user available inodes */ | |
1063 | *p++ = htonl(resp->invarsec); /* mean unchanged time */ | |
1064 | } | |
1065 | return xdr_ressize_check(rqstp, p); | |
1066 | } | |
1067 | ||
1068 | /* FSINFO */ | |
1069 | int | |
63f8de37 | 1070 | nfs3svc_encode_fsinfores(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 1071 | { |
63f8de37 CH |
1072 | struct nfsd3_fsinfores *resp = rqstp->rq_resp; |
1073 | ||
1da177e4 LT |
1074 | *p++ = xdr_zero; /* no post_op_attr */ |
1075 | ||
1076 | if (resp->status == 0) { | |
1077 | *p++ = htonl(resp->f_rtmax); | |
1078 | *p++ = htonl(resp->f_rtpref); | |
1079 | *p++ = htonl(resp->f_rtmult); | |
1080 | *p++ = htonl(resp->f_wtmax); | |
1081 | *p++ = htonl(resp->f_wtpref); | |
1082 | *p++ = htonl(resp->f_wtmult); | |
1083 | *p++ = htonl(resp->f_dtpref); | |
1084 | p = xdr_encode_hyper(p, resp->f_maxfilesize); | |
1085 | *p++ = xdr_one; | |
1086 | *p++ = xdr_zero; | |
1087 | *p++ = htonl(resp->f_properties); | |
1088 | } | |
1089 | ||
1090 | return xdr_ressize_check(rqstp, p); | |
1091 | } | |
1092 | ||
1093 | /* PATHCONF */ | |
1094 | int | |
63f8de37 | 1095 | nfs3svc_encode_pathconfres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 1096 | { |
63f8de37 CH |
1097 | struct nfsd3_pathconfres *resp = rqstp->rq_resp; |
1098 | ||
1da177e4 LT |
1099 | *p++ = xdr_zero; /* no post_op_attr */ |
1100 | ||
1101 | if (resp->status == 0) { | |
1102 | *p++ = htonl(resp->p_link_max); | |
1103 | *p++ = htonl(resp->p_name_max); | |
1104 | *p++ = htonl(resp->p_no_trunc); | |
1105 | *p++ = htonl(resp->p_chown_restricted); | |
1106 | *p++ = htonl(resp->p_case_insensitive); | |
1107 | *p++ = htonl(resp->p_case_preserving); | |
1108 | } | |
1109 | ||
1110 | return xdr_ressize_check(rqstp, p); | |
1111 | } | |
1112 | ||
1113 | /* COMMIT */ | |
1114 | int | |
63f8de37 | 1115 | nfs3svc_encode_commitres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 1116 | { |
63f8de37 | 1117 | struct nfsd3_commitres *resp = rqstp->rq_resp; |
b9c0ef85 SK |
1118 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1119 | ||
1da177e4 LT |
1120 | p = encode_wcc_data(rqstp, p, &resp->fh); |
1121 | /* Write verifier */ | |
1122 | if (resp->status == 0) { | |
256a89fa AB |
1123 | /* unique identifier, y2038 overflow can be ignored */ |
1124 | *p++ = htonl((u32)nn->nfssvc_boot.tv_sec); | |
1125 | *p++ = htonl(nn->nfssvc_boot.tv_nsec); | |
1da177e4 LT |
1126 | } |
1127 | return xdr_ressize_check(rqstp, p); | |
1128 | } | |
1129 | ||
1130 | /* | |
1131 | * XDR release functions | |
1132 | */ | |
8537488b CH |
1133 | void |
1134 | nfs3svc_release_fhandle(struct svc_rqst *rqstp) | |
1da177e4 | 1135 | { |
8537488b CH |
1136 | struct nfsd3_attrstat *resp = rqstp->rq_resp; |
1137 | ||
1da177e4 | 1138 | fh_put(&resp->fh); |
1da177e4 LT |
1139 | } |
1140 | ||
8537488b CH |
1141 | void |
1142 | nfs3svc_release_fhandle2(struct svc_rqst *rqstp) | |
1da177e4 | 1143 | { |
8537488b CH |
1144 | struct nfsd3_fhandle_pair *resp = rqstp->rq_resp; |
1145 | ||
1da177e4 LT |
1146 | fh_put(&resp->fh1); |
1147 | fh_put(&resp->fh2); | |
1da177e4 | 1148 | } |