]>
Commit | Line | Data |
---|---|---|
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 * |
e45d1a18 | 99 | decode_sattr3(__be32 *p, struct iattr *iap, struct user_namespace *userns) |
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++) { | |
e45d1a18 | 110 | iap->ia_uid = make_kuid(userns, ntohl(*p++)); |
458878a7 EB |
111 | if (uid_valid(iap->ia_uid)) |
112 | iap->ia_valid |= ATTR_UID; | |
1da177e4 LT |
113 | } |
114 | if (*p++) { | |
e45d1a18 | 115 | iap->ia_gid = make_kgid(userns, ntohl(*p++)); |
458878a7 EB |
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 | { |
e45d1a18 | 168 | struct user_namespace *userns = nfsd_user_namespace(rqstp); |
95582b00 | 169 | struct timespec ts; |
a334de28 | 170 | *p++ = htonl(nfs3_ftypes[(stat->mode & S_IFMT) >> 12]); |
6e14b46b | 171 | *p++ = htonl((u32) (stat->mode & S_IALLUGO)); |
a334de28 | 172 | *p++ = htonl((u32) stat->nlink); |
e45d1a18 TM |
173 | *p++ = htonl((u32) from_kuid_munged(userns, stat->uid)); |
174 | *p++ = htonl((u32) from_kgid_munged(userns, stat->gid)); | |
a334de28 | 175 | if (S_ISLNK(stat->mode) && stat->size > NFS3_MAXPATHLEN) { |
1da177e4 LT |
176 | p = xdr_encode_hyper(p, (u64) NFS3_MAXPATHLEN); |
177 | } else { | |
a334de28 | 178 | p = xdr_encode_hyper(p, (u64) stat->size); |
1da177e4 | 179 | } |
a334de28 DS |
180 | p = xdr_encode_hyper(p, ((u64)stat->blocks) << 9); |
181 | *p++ = htonl((u32) MAJOR(stat->rdev)); | |
182 | *p++ = htonl((u32) MINOR(stat->rdev)); | |
af6a4e28 | 183 | p = encode_fsid(p, fhp); |
40ee5dc6 | 184 | p = xdr_encode_hyper(p, stat->ino); |
95582b00 DD |
185 | ts = timespec64_to_timespec(stat->atime); |
186 | p = encode_time3(p, &ts); | |
187 | ts = timespec64_to_timespec(stat->mtime); | |
188 | p = encode_time3(p, &ts); | |
189 | ts = timespec64_to_timespec(stat->ctime); | |
190 | p = encode_time3(p, &ts); | |
1da177e4 LT |
191 | |
192 | return p; | |
193 | } | |
194 | ||
3ee6f61c | 195 | static __be32 * |
91f07168 | 196 | encode_saved_post_attr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp) |
1da177e4 | 197 | { |
1da177e4 LT |
198 | /* Attributes to follow */ |
199 | *p++ = xdr_one; | |
40ee5dc6 | 200 | return encode_fattr3(rqstp, p, fhp, &fhp->fh_post_attr); |
1da177e4 LT |
201 | } |
202 | ||
203 | /* | |
204 | * Encode post-operation attributes. | |
205 | * The inode may be NULL if the call failed because of a stale file | |
206 | * handle. In this case, no attributes are returned. | |
207 | */ | |
91f07168 AV |
208 | static __be32 * |
209 | encode_post_op_attr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp) | |
1da177e4 LT |
210 | { |
211 | struct dentry *dentry = fhp->fh_dentry; | |
2b0143b5 | 212 | if (dentry && d_really_is_positive(dentry)) { |
3dadecce | 213 | __be32 err; |
a334de28 DS |
214 | struct kstat stat; |
215 | ||
3dadecce | 216 | err = fh_getattr(fhp, &stat); |
a334de28 DS |
217 | if (!err) { |
218 | *p++ = xdr_one; /* attributes follow */ | |
2b0143b5 | 219 | lease_get_mtime(d_inode(dentry), &stat.mtime); |
a334de28 DS |
220 | return encode_fattr3(rqstp, p, fhp, &stat); |
221 | } | |
1da177e4 LT |
222 | } |
223 | *p++ = xdr_zero; | |
224 | return p; | |
225 | } | |
226 | ||
a257cdd0 | 227 | /* Helper for NFSv3 ACLs */ |
91f07168 AV |
228 | __be32 * |
229 | nfs3svc_encode_post_op_attr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp) | |
a257cdd0 AG |
230 | { |
231 | return encode_post_op_attr(rqstp, p, fhp); | |
232 | } | |
233 | ||
1da177e4 LT |
234 | /* |
235 | * Enocde weak cache consistency data | |
236 | */ | |
91f07168 AV |
237 | static __be32 * |
238 | encode_wcc_data(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp) | |
1da177e4 LT |
239 | { |
240 | struct dentry *dentry = fhp->fh_dentry; | |
241 | ||
2b0143b5 | 242 | if (dentry && d_really_is_positive(dentry) && fhp->fh_post_saved) { |
1da177e4 LT |
243 | if (fhp->fh_pre_saved) { |
244 | *p++ = xdr_one; | |
245 | p = xdr_encode_hyper(p, (u64) fhp->fh_pre_size); | |
246 | p = encode_time3(p, &fhp->fh_pre_mtime); | |
247 | p = encode_time3(p, &fhp->fh_pre_ctime); | |
248 | } else { | |
249 | *p++ = xdr_zero; | |
250 | } | |
251 | return encode_saved_post_attr(rqstp, p, fhp); | |
252 | } | |
253 | /* no pre- or post-attrs */ | |
254 | *p++ = xdr_zero; | |
255 | return encode_post_op_attr(rqstp, p, fhp); | |
256 | } | |
257 | ||
39ca1bf6 AG |
258 | /* |
259 | * Fill in the pre_op attr for the wcc data | |
260 | */ | |
261 | void fill_pre_wcc(struct svc_fh *fhp) | |
262 | { | |
263 | struct inode *inode; | |
264 | struct kstat stat; | |
265 | __be32 err; | |
266 | ||
267 | if (fhp->fh_pre_saved) | |
268 | return; | |
269 | ||
270 | inode = d_inode(fhp->fh_dentry); | |
271 | err = fh_getattr(fhp, &stat); | |
272 | if (err) { | |
273 | /* Grab the times from inode anyway */ | |
274 | stat.mtime = inode->i_mtime; | |
275 | stat.ctime = inode->i_ctime; | |
276 | stat.size = inode->i_size; | |
277 | } | |
278 | ||
95582b00 DD |
279 | fhp->fh_pre_mtime = timespec64_to_timespec(stat.mtime); |
280 | fhp->fh_pre_ctime = timespec64_to_timespec(stat.ctime); | |
39ca1bf6 AG |
281 | fhp->fh_pre_size = stat.size; |
282 | fhp->fh_pre_change = nfsd4_change_attribute(&stat, inode); | |
283 | fhp->fh_pre_saved = true; | |
284 | } | |
285 | ||
40ee5dc6 PS |
286 | /* |
287 | * Fill in the post_op attr for the wcc data | |
288 | */ | |
289 | void fill_post_wcc(struct svc_fh *fhp) | |
290 | { | |
3dadecce | 291 | __be32 err; |
40ee5dc6 PS |
292 | |
293 | if (fhp->fh_post_saved) | |
294 | printk("nfsd: inode locked twice during operation.\n"); | |
295 | ||
3dadecce | 296 | err = fh_getattr(fhp, &fhp->fh_post_attr); |
39ca1bf6 AG |
297 | fhp->fh_post_change = nfsd4_change_attribute(&fhp->fh_post_attr, |
298 | d_inode(fhp->fh_dentry)); | |
c1ac3ffc | 299 | if (err) { |
aaf91ec1 | 300 | fhp->fh_post_saved = false; |
c1ac3ffc | 301 | /* Grab the ctime anyway - set_change_info might use it */ |
2b0143b5 | 302 | fhp->fh_post_attr.ctime = d_inode(fhp->fh_dentry)->i_ctime; |
c1ac3ffc | 303 | } else |
aaf91ec1 | 304 | fhp->fh_post_saved = true; |
40ee5dc6 | 305 | } |
1da177e4 LT |
306 | |
307 | /* | |
308 | * XDR decode functions | |
309 | */ | |
310 | int | |
026fec7e | 311 | nfs3svc_decode_fhandle(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 312 | { |
026fec7e CH |
313 | struct nfsd_fhandle *args = rqstp->rq_argp; |
314 | ||
d40aa337 BT |
315 | p = decode_fh(p, &args->fh); |
316 | if (!p) | |
1da177e4 LT |
317 | return 0; |
318 | return xdr_argsize_check(rqstp, p); | |
319 | } | |
320 | ||
321 | int | |
026fec7e | 322 | nfs3svc_decode_sattrargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 323 | { |
026fec7e CH |
324 | struct nfsd3_sattrargs *args = rqstp->rq_argp; |
325 | ||
d40aa337 BT |
326 | p = decode_fh(p, &args->fh); |
327 | if (!p) | |
1da177e4 | 328 | return 0; |
e45d1a18 | 329 | p = decode_sattr3(p, &args->attrs, nfsd_user_namespace(rqstp)); |
1da177e4 LT |
330 | |
331 | if ((args->check_guard = ntohl(*p++)) != 0) { | |
332 | struct timespec time; | |
333 | p = decode_time3(p, &time); | |
334 | args->guardtime = time.tv_sec; | |
335 | } | |
336 | ||
337 | return xdr_argsize_check(rqstp, p); | |
338 | } | |
339 | ||
340 | int | |
026fec7e | 341 | nfs3svc_decode_diropargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 342 | { |
026fec7e CH |
343 | struct nfsd3_diropargs *args = rqstp->rq_argp; |
344 | ||
1da177e4 LT |
345 | if (!(p = decode_fh(p, &args->fh)) |
346 | || !(p = decode_filename(p, &args->name, &args->len))) | |
347 | return 0; | |
348 | ||
349 | return xdr_argsize_check(rqstp, p); | |
350 | } | |
351 | ||
352 | int | |
026fec7e | 353 | nfs3svc_decode_accessargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 354 | { |
026fec7e CH |
355 | struct nfsd3_accessargs *args = rqstp->rq_argp; |
356 | ||
d40aa337 BT |
357 | p = decode_fh(p, &args->fh); |
358 | if (!p) | |
1da177e4 LT |
359 | return 0; |
360 | args->access = ntohl(*p++); | |
361 | ||
362 | return xdr_argsize_check(rqstp, p); | |
363 | } | |
364 | ||
365 | int | |
026fec7e | 366 | nfs3svc_decode_readargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 367 | { |
026fec7e | 368 | struct nfsd3_readargs *args = rqstp->rq_argp; |
1da177e4 | 369 | unsigned int len; |
afc59400 | 370 | int v; |
7adae489 | 371 | u32 max_blocksize = svc_max_payload(rqstp); |
1da177e4 | 372 | |
d40aa337 BT |
373 | p = decode_fh(p, &args->fh); |
374 | if (!p) | |
1da177e4 | 375 | return 0; |
072f62ed | 376 | p = xdr_decode_hyper(p, &args->offset); |
51f56777 | 377 | |
9512a16b | 378 | args->count = ntohl(*p++); |
3c7aa15d | 379 | len = min(args->count, max_blocksize); |
1da177e4 LT |
380 | |
381 | /* set up the kvec */ | |
382 | v=0; | |
383 | while (len > 0) { | |
afc59400 BF |
384 | struct page *p = *(rqstp->rq_next_page++); |
385 | ||
386 | rqstp->rq_vec[v].iov_base = page_address(p); | |
3c7aa15d | 387 | rqstp->rq_vec[v].iov_len = min_t(unsigned int, len, PAGE_SIZE); |
3cc03b16 | 388 | len -= rqstp->rq_vec[v].iov_len; |
1da177e4 LT |
389 | v++; |
390 | } | |
391 | args->vlen = v; | |
9512a16b | 392 | return xdr_argsize_check(rqstp, p); |
1da177e4 LT |
393 | } |
394 | ||
395 | int | |
026fec7e | 396 | nfs3svc_decode_writeargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 397 | { |
026fec7e | 398 | struct nfsd3_writeargs *args = rqstp->rq_argp; |
8154ef27 | 399 | unsigned int len, hdr, dlen; |
7adae489 | 400 | u32 max_blocksize = svc_max_payload(rqstp); |
db44bac4 BF |
401 | struct kvec *head = rqstp->rq_arg.head; |
402 | struct kvec *tail = rqstp->rq_arg.tail; | |
1da177e4 | 403 | |
d40aa337 BT |
404 | p = decode_fh(p, &args->fh); |
405 | if (!p) | |
1da177e4 | 406 | return 0; |
072f62ed | 407 | p = xdr_decode_hyper(p, &args->offset); |
1da177e4 LT |
408 | |
409 | args->count = ntohl(*p++); | |
410 | args->stable = ntohl(*p++); | |
411 | len = args->len = ntohl(*p++); | |
13bf9fbf BF |
412 | if ((void *)p > head->iov_base + head->iov_len) |
413 | return 0; | |
f34b9568 PS |
414 | /* |
415 | * The count must equal the amount of data passed. | |
416 | */ | |
417 | if (args->count != args->len) | |
418 | return 0; | |
1da177e4 | 419 | |
f34b9568 PS |
420 | /* |
421 | * Check to make sure that we got the right number of | |
422 | * bytes. | |
f34b9568 | 423 | */ |
db44bac4 BF |
424 | hdr = (void*)p - head->iov_base; |
425 | dlen = head->iov_len + rqstp->rq_arg.page_len + tail->iov_len - hdr; | |
f34b9568 PS |
426 | /* |
427 | * Round the length of the data which was specified up to | |
428 | * the next multiple of XDR units and then compare that | |
429 | * against the length which was actually received. | |
ba67a39e N |
430 | * Note that when RPCSEC/GSS (for example) is used, the |
431 | * data buffer can be padded so dlen might be larger | |
432 | * than required. It must never be smaller. | |
f34b9568 | 433 | */ |
ba67a39e | 434 | if (dlen < XDR_QUADLEN(len)*4) |
1da177e4 LT |
435 | return 0; |
436 | ||
f34b9568 PS |
437 | if (args->count > max_blocksize) { |
438 | args->count = max_blocksize; | |
439 | len = args->len = max_blocksize; | |
440 | } | |
8154ef27 CL |
441 | |
442 | args->first.iov_base = (void *)p; | |
443 | args->first.iov_len = head->iov_len - hdr; | |
f34b9568 | 444 | return 1; |
1da177e4 LT |
445 | } |
446 | ||
447 | int | |
026fec7e | 448 | nfs3svc_decode_createargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 449 | { |
026fec7e CH |
450 | struct nfsd3_createargs *args = rqstp->rq_argp; |
451 | ||
1da177e4 LT |
452 | if (!(p = decode_fh(p, &args->fh)) |
453 | || !(p = decode_filename(p, &args->name, &args->len))) | |
454 | return 0; | |
455 | ||
456 | switch (args->createmode = ntohl(*p++)) { | |
457 | case NFS3_CREATE_UNCHECKED: | |
458 | case NFS3_CREATE_GUARDED: | |
e45d1a18 | 459 | p = decode_sattr3(p, &args->attrs, nfsd_user_namespace(rqstp)); |
1da177e4 LT |
460 | break; |
461 | case NFS3_CREATE_EXCLUSIVE: | |
462 | args->verf = p; | |
463 | p += 2; | |
464 | break; | |
465 | default: | |
466 | return 0; | |
467 | } | |
468 | ||
469 | return xdr_argsize_check(rqstp, p); | |
470 | } | |
026fec7e | 471 | |
1da177e4 | 472 | int |
026fec7e | 473 | nfs3svc_decode_mkdirargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 474 | { |
026fec7e CH |
475 | struct nfsd3_createargs *args = rqstp->rq_argp; |
476 | ||
072f62ed N |
477 | if (!(p = decode_fh(p, &args->fh)) || |
478 | !(p = decode_filename(p, &args->name, &args->len))) | |
1da177e4 | 479 | return 0; |
e45d1a18 | 480 | p = decode_sattr3(p, &args->attrs, nfsd_user_namespace(rqstp)); |
1da177e4 LT |
481 | |
482 | return xdr_argsize_check(rqstp, p); | |
483 | } | |
484 | ||
485 | int | |
026fec7e | 486 | nfs3svc_decode_symlinkargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 487 | { |
026fec7e | 488 | struct nfsd3_symlinkargs *args = rqstp->rq_argp; |
38a70315 CL |
489 | char *base = (char *)p; |
490 | size_t dlen; | |
1da177e4 | 491 | |
072f62ed | 492 | if (!(p = decode_fh(p, &args->ffh)) || |
38a70315 | 493 | !(p = decode_filename(p, &args->fname, &args->flen))) |
1da177e4 | 494 | return 0; |
e45d1a18 | 495 | p = decode_sattr3(p, &args->attrs, nfsd_user_namespace(rqstp)); |
072f62ed | 496 | |
38a70315 | 497 | args->tlen = ntohl(*p++); |
1da177e4 | 498 | |
38a70315 CL |
499 | args->first.iov_base = p; |
500 | args->first.iov_len = rqstp->rq_arg.head[0].iov_len; | |
501 | args->first.iov_len -= (char *)p - base; | |
502 | ||
503 | dlen = args->first.iov_len + rqstp->rq_arg.page_len + | |
504 | rqstp->rq_arg.tail[0].iov_len; | |
505 | if (dlen < XDR_QUADLEN(args->tlen) << 2) | |
506 | return 0; | |
1da177e4 LT |
507 | return 1; |
508 | } | |
509 | ||
510 | int | |
026fec7e | 511 | nfs3svc_decode_mknodargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 512 | { |
026fec7e 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 | 522 | || args->ftype == NF3SOCK || args->ftype == NF3FIFO) |
e45d1a18 | 523 | p = decode_sattr3(p, &args->attrs, nfsd_user_namespace(rqstp)); |
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 | |
026fec7e | 534 | nfs3svc_decode_renameargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 535 | { |
026fec7e 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 | |
026fec7e | 548 | nfs3svc_decode_readlinkargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 549 | { |
026fec7e 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 | |
026fec7e | 561 | nfs3svc_decode_linkargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 562 | { |
026fec7e 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 | |
026fec7e | 574 | nfs3svc_decode_readdirargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 575 | { |
026fec7e | 576 | struct nfsd3_readdirargs *args = rqstp->rq_argp; |
3c86794a | 577 | int len; |
f875a792 N |
578 | u32 max_blocksize = svc_max_payload(rqstp); |
579 | ||
d40aa337 BT |
580 | p = decode_fh(p, &args->fh); |
581 | if (!p) | |
1da177e4 LT |
582 | return 0; |
583 | p = xdr_decode_hyper(p, &args->cookie); | |
584 | args->verf = p; p += 2; | |
585 | args->dircount = ~0; | |
586 | args->count = ntohl(*p++); | |
3c86794a MZ |
587 | len = args->count = min_t(u32, args->count, max_blocksize); |
588 | ||
589 | while (len > 0) { | |
590 | struct page *p = *(rqstp->rq_next_page++); | |
591 | if (!args->buffer) | |
592 | args->buffer = page_address(p); | |
593 | len -= PAGE_SIZE; | |
594 | } | |
1da177e4 | 595 | |
9512a16b | 596 | return xdr_argsize_check(rqstp, p); |
1da177e4 LT |
597 | } |
598 | ||
599 | int | |
026fec7e | 600 | nfs3svc_decode_readdirplusargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 601 | { |
026fec7e | 602 | struct nfsd3_readdirargs *args = rqstp->rq_argp; |
afc59400 | 603 | int len; |
7adae489 | 604 | u32 max_blocksize = svc_max_payload(rqstp); |
1da177e4 | 605 | |
d40aa337 BT |
606 | p = decode_fh(p, &args->fh); |
607 | if (!p) | |
1da177e4 LT |
608 | return 0; |
609 | p = xdr_decode_hyper(p, &args->cookie); | |
610 | args->verf = p; p += 2; | |
611 | args->dircount = ntohl(*p++); | |
612 | args->count = ntohl(*p++); | |
613 | ||
3c7aa15d | 614 | len = args->count = min(args->count, max_blocksize); |
1da177e4 | 615 | while (len > 0) { |
afc59400 | 616 | struct page *p = *(rqstp->rq_next_page++); |
1da177e4 | 617 | if (!args->buffer) |
afc59400 | 618 | args->buffer = page_address(p); |
1da177e4 LT |
619 | len -= PAGE_SIZE; |
620 | } | |
9512a16b BF |
621 | |
622 | return xdr_argsize_check(rqstp, p); | |
1da177e4 LT |
623 | } |
624 | ||
625 | int | |
026fec7e | 626 | nfs3svc_decode_commitargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 627 | { |
026fec7e | 628 | struct nfsd3_commitargs *args = rqstp->rq_argp; |
d40aa337 BT |
629 | p = decode_fh(p, &args->fh); |
630 | if (!p) | |
1da177e4 LT |
631 | return 0; |
632 | p = xdr_decode_hyper(p, &args->offset); | |
633 | args->count = ntohl(*p++); | |
634 | ||
635 | return xdr_argsize_check(rqstp, p); | |
636 | } | |
637 | ||
638 | /* | |
639 | * XDR encode functions | |
640 | */ | |
641 | /* | |
642 | * There must be an encoding function for void results so svc_process | |
643 | * will work properly. | |
644 | */ | |
645 | int | |
63f8de37 | 646 | nfs3svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 LT |
647 | { |
648 | return xdr_ressize_check(rqstp, p); | |
649 | } | |
650 | ||
651 | /* GETATTR */ | |
652 | int | |
63f8de37 | 653 | nfs3svc_encode_attrstat(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 654 | { |
63f8de37 CH |
655 | struct nfsd3_attrstat *resp = rqstp->rq_resp; |
656 | ||
40ee5dc6 | 657 | if (resp->status == 0) { |
2b0143b5 | 658 | lease_get_mtime(d_inode(resp->fh.fh_dentry), |
40ee5dc6 | 659 | &resp->stat.mtime); |
a334de28 | 660 | p = encode_fattr3(rqstp, p, &resp->fh, &resp->stat); |
40ee5dc6 | 661 | } |
1da177e4 LT |
662 | return xdr_ressize_check(rqstp, p); |
663 | } | |
664 | ||
665 | /* SETATTR, REMOVE, RMDIR */ | |
666 | int | |
63f8de37 | 667 | nfs3svc_encode_wccstat(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 668 | { |
63f8de37 CH |
669 | struct nfsd3_attrstat *resp = rqstp->rq_resp; |
670 | ||
1da177e4 LT |
671 | p = encode_wcc_data(rqstp, p, &resp->fh); |
672 | return xdr_ressize_check(rqstp, p); | |
673 | } | |
674 | ||
675 | /* LOOKUP */ | |
676 | int | |
63f8de37 | 677 | nfs3svc_encode_diropres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 678 | { |
63f8de37 CH |
679 | struct nfsd3_diropres *resp = rqstp->rq_resp; |
680 | ||
1da177e4 LT |
681 | if (resp->status == 0) { |
682 | p = encode_fh(p, &resp->fh); | |
683 | p = encode_post_op_attr(rqstp, p, &resp->fh); | |
684 | } | |
685 | p = encode_post_op_attr(rqstp, p, &resp->dirfh); | |
686 | return xdr_ressize_check(rqstp, p); | |
687 | } | |
688 | ||
689 | /* ACCESS */ | |
690 | int | |
63f8de37 | 691 | nfs3svc_encode_accessres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 692 | { |
63f8de37 CH |
693 | struct nfsd3_accessres *resp = rqstp->rq_resp; |
694 | ||
1da177e4 LT |
695 | p = encode_post_op_attr(rqstp, p, &resp->fh); |
696 | if (resp->status == 0) | |
697 | *p++ = htonl(resp->access); | |
698 | return xdr_ressize_check(rqstp, p); | |
699 | } | |
700 | ||
701 | /* READLINK */ | |
702 | int | |
63f8de37 | 703 | nfs3svc_encode_readlinkres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 704 | { |
63f8de37 CH |
705 | struct nfsd3_readlinkres *resp = rqstp->rq_resp; |
706 | ||
1da177e4 LT |
707 | p = encode_post_op_attr(rqstp, p, &resp->fh); |
708 | if (resp->status == 0) { | |
709 | *p++ = htonl(resp->len); | |
710 | xdr_ressize_check(rqstp, p); | |
711 | rqstp->rq_res.page_len = resp->len; | |
712 | if (resp->len & 3) { | |
713 | /* need to pad the tail */ | |
1da177e4 LT |
714 | rqstp->rq_res.tail[0].iov_base = p; |
715 | *p = 0; | |
716 | rqstp->rq_res.tail[0].iov_len = 4 - (resp->len&3); | |
717 | } | |
718 | return 1; | |
719 | } else | |
720 | return xdr_ressize_check(rqstp, p); | |
721 | } | |
722 | ||
723 | /* READ */ | |
724 | int | |
63f8de37 | 725 | nfs3svc_encode_readres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 726 | { |
63f8de37 CH |
727 | struct nfsd3_readres *resp = rqstp->rq_resp; |
728 | ||
1da177e4 LT |
729 | p = encode_post_op_attr(rqstp, p, &resp->fh); |
730 | if (resp->status == 0) { | |
731 | *p++ = htonl(resp->count); | |
732 | *p++ = htonl(resp->eof); | |
733 | *p++ = htonl(resp->count); /* xdr opaque count */ | |
734 | xdr_ressize_check(rqstp, p); | |
25985edc | 735 | /* now update rqstp->rq_res to reflect data as well */ |
1da177e4 LT |
736 | rqstp->rq_res.page_len = resp->count; |
737 | if (resp->count & 3) { | |
738 | /* need to pad the tail */ | |
1da177e4 LT |
739 | rqstp->rq_res.tail[0].iov_base = p; |
740 | *p = 0; | |
741 | rqstp->rq_res.tail[0].iov_len = 4 - (resp->count & 3); | |
742 | } | |
743 | return 1; | |
744 | } else | |
745 | return xdr_ressize_check(rqstp, p); | |
746 | } | |
747 | ||
748 | /* WRITE */ | |
749 | int | |
63f8de37 | 750 | nfs3svc_encode_writeres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 751 | { |
63f8de37 | 752 | struct nfsd3_writeres *resp = rqstp->rq_resp; |
b9c0ef85 SK |
753 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
754 | ||
1da177e4 LT |
755 | p = encode_wcc_data(rqstp, p, &resp->fh); |
756 | if (resp->status == 0) { | |
757 | *p++ = htonl(resp->count); | |
758 | *p++ = htonl(resp->committed); | |
256a89fa AB |
759 | /* unique identifier, y2038 overflow can be ignored */ |
760 | *p++ = htonl((u32)nn->nfssvc_boot.tv_sec); | |
761 | *p++ = htonl(nn->nfssvc_boot.tv_nsec); | |
1da177e4 LT |
762 | } |
763 | return xdr_ressize_check(rqstp, p); | |
764 | } | |
765 | ||
766 | /* CREATE, MKDIR, SYMLINK, MKNOD */ | |
767 | int | |
63f8de37 | 768 | nfs3svc_encode_createres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 769 | { |
63f8de37 CH |
770 | struct nfsd3_diropres *resp = rqstp->rq_resp; |
771 | ||
1da177e4 LT |
772 | if (resp->status == 0) { |
773 | *p++ = xdr_one; | |
774 | p = encode_fh(p, &resp->fh); | |
775 | p = encode_post_op_attr(rqstp, p, &resp->fh); | |
776 | } | |
777 | p = encode_wcc_data(rqstp, p, &resp->dirfh); | |
778 | return xdr_ressize_check(rqstp, p); | |
779 | } | |
780 | ||
781 | /* RENAME */ | |
782 | int | |
63f8de37 | 783 | nfs3svc_encode_renameres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 784 | { |
63f8de37 CH |
785 | struct nfsd3_renameres *resp = rqstp->rq_resp; |
786 | ||
1da177e4 LT |
787 | p = encode_wcc_data(rqstp, p, &resp->ffh); |
788 | p = encode_wcc_data(rqstp, p, &resp->tfh); | |
789 | return xdr_ressize_check(rqstp, p); | |
790 | } | |
791 | ||
792 | /* LINK */ | |
793 | int | |
63f8de37 | 794 | nfs3svc_encode_linkres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 795 | { |
63f8de37 CH |
796 | struct nfsd3_linkres *resp = rqstp->rq_resp; |
797 | ||
1da177e4 LT |
798 | p = encode_post_op_attr(rqstp, p, &resp->fh); |
799 | p = encode_wcc_data(rqstp, p, &resp->tfh); | |
800 | return xdr_ressize_check(rqstp, p); | |
801 | } | |
802 | ||
803 | /* READDIR */ | |
804 | int | |
63f8de37 | 805 | nfs3svc_encode_readdirres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 806 | { |
63f8de37 CH |
807 | struct nfsd3_readdirres *resp = rqstp->rq_resp; |
808 | ||
1da177e4 LT |
809 | p = encode_post_op_attr(rqstp, p, &resp->fh); |
810 | ||
811 | if (resp->status == 0) { | |
812 | /* stupid readdir cookie */ | |
813 | memcpy(p, resp->verf, 8); p += 2; | |
814 | xdr_ressize_check(rqstp, p); | |
815 | if (rqstp->rq_res.head[0].iov_len + (2<<2) > PAGE_SIZE) | |
816 | return 1; /*No room for trailer */ | |
817 | rqstp->rq_res.page_len = (resp->count) << 2; | |
818 | ||
819 | /* add the 'tail' to the end of the 'head' page - page 0. */ | |
1da177e4 LT |
820 | rqstp->rq_res.tail[0].iov_base = p; |
821 | *p++ = 0; /* no more entries */ | |
822 | *p++ = htonl(resp->common.err == nfserr_eof); | |
823 | rqstp->rq_res.tail[0].iov_len = 2<<2; | |
824 | return 1; | |
825 | } else | |
826 | return xdr_ressize_check(rqstp, p); | |
827 | } | |
828 | ||
3ee6f61c | 829 | static __be32 * |
91f07168 | 830 | encode_entry_baggage(struct nfsd3_readdirres *cd, __be32 *p, const char *name, |
40ee5dc6 | 831 | int namlen, u64 ino) |
1da177e4 LT |
832 | { |
833 | *p++ = xdr_one; /* mark entry present */ | |
834 | p = xdr_encode_hyper(p, ino); /* file id */ | |
835 | p = xdr_encode_array(p, name, namlen);/* name length & name */ | |
836 | ||
837 | cd->offset = p; /* remember pointer */ | |
838 | p = xdr_encode_hyper(p, NFS_OFFSET_MAX);/* offset of next entry */ | |
839 | ||
840 | return p; | |
841 | } | |
842 | ||
efe39651 | 843 | static __be32 |
1da177e4 | 844 | compose_entry_fh(struct nfsd3_readdirres *cd, struct svc_fh *fhp, |
43b0e7ea | 845 | const char *name, int namlen, u64 ino) |
1da177e4 LT |
846 | { |
847 | struct svc_export *exp; | |
848 | struct dentry *dparent, *dchild; | |
efe39651 | 849 | __be32 rv = nfserr_noent; |
1da177e4 LT |
850 | |
851 | dparent = cd->fh.fh_dentry; | |
852 | exp = cd->fh.fh_export; | |
853 | ||
1da177e4 LT |
854 | if (isdotent(name, namlen)) { |
855 | if (namlen == 2) { | |
856 | dchild = dget_parent(dparent); | |
efe39651 AV |
857 | /* filesystem root - cannot return filehandle for ".." */ |
858 | if (dchild == dparent) | |
859 | goto out; | |
1da177e4 LT |
860 | } else |
861 | dchild = dget(dparent); | |
862 | } else | |
bbddca8e | 863 | dchild = lookup_one_len_unlocked(name, dparent, namlen); |
1da177e4 | 864 | if (IS_ERR(dchild)) |
efe39651 | 865 | return rv; |
8177e6d6 BF |
866 | if (d_mountpoint(dchild)) |
867 | goto out; | |
2b0143b5 | 868 | if (d_really_is_negative(dchild)) |
8177e6d6 | 869 | goto out; |
43b0e7ea N |
870 | if (dchild->d_inode->i_ino != ino) |
871 | goto out; | |
efe39651 | 872 | rv = fh_compose(fhp, exp, dchild, &cd->fh); |
8177e6d6 | 873 | out: |
1da177e4 LT |
874 | dput(dchild); |
875 | return rv; | |
876 | } | |
877 | ||
43b0e7ea | 878 | static __be32 *encode_entryplus_baggage(struct nfsd3_readdirres *cd, __be32 *p, const char *name, int namlen, u64 ino) |
8177e6d6 | 879 | { |
068c34c0 | 880 | struct svc_fh *fh = &cd->scratch; |
efe39651 | 881 | __be32 err; |
8177e6d6 | 882 | |
068c34c0 | 883 | fh_init(fh, NFS3_FHSIZE); |
43b0e7ea | 884 | err = compose_entry_fh(cd, fh, name, namlen, ino); |
8177e6d6 BF |
885 | if (err) { |
886 | *p++ = 0; | |
887 | *p++ = 0; | |
aed100fa | 888 | goto out; |
8177e6d6 | 889 | } |
068c34c0 | 890 | p = encode_post_op_attr(cd->rqstp, p, fh); |
8177e6d6 | 891 | *p++ = xdr_one; /* yes, a file handle follows */ |
068c34c0 | 892 | p = encode_fh(p, fh); |
aed100fa | 893 | out: |
068c34c0 | 894 | fh_put(fh); |
8177e6d6 BF |
895 | return p; |
896 | } | |
897 | ||
1da177e4 LT |
898 | /* |
899 | * Encode a directory entry. This one works for both normal readdir | |
900 | * and readdirplus. | |
901 | * The normal readdir reply requires 2 (fileid) + 1 (stringlen) | |
902 | * + string + 2 (cookie) + 1 (next) words, i.e. 6 + strlen. | |
903 | * | |
904 | * The readdirplus baggage is 1+21 words for post_op_attr, plus the | |
905 | * file handle. | |
906 | */ | |
907 | ||
908 | #define NFS3_ENTRY_BAGGAGE (2 + 1 + 2 + 1) | |
909 | #define NFS3_ENTRYPLUS_BAGGAGE (1 + 21 + 1 + (NFS3_FHSIZE >> 2)) | |
910 | static int | |
598b9a56 | 911 | encode_entry(struct readdir_cd *ccd, const char *name, int namlen, |
40ee5dc6 | 912 | loff_t offset, u64 ino, unsigned int d_type, int plus) |
1da177e4 LT |
913 | { |
914 | struct nfsd3_readdirres *cd = container_of(ccd, struct nfsd3_readdirres, | |
915 | common); | |
91f07168 | 916 | __be32 *p = cd->buffer; |
1da177e4 | 917 | caddr_t curr_page_addr = NULL; |
afc59400 | 918 | struct page ** page; |
1da177e4 LT |
919 | int slen; /* string (name) length */ |
920 | int elen; /* estimated entry length in words */ | |
921 | int num_entry_words = 0; /* actual number of words */ | |
922 | ||
923 | if (cd->offset) { | |
924 | u64 offset64 = offset; | |
925 | ||
926 | if (unlikely(cd->offset1)) { | |
927 | /* we ended up with offset on a page boundary */ | |
928 | *cd->offset = htonl(offset64 >> 32); | |
929 | *cd->offset1 = htonl(offset64 & 0xffffffff); | |
930 | cd->offset1 = NULL; | |
931 | } else { | |
598b9a56 | 932 | xdr_encode_hyper(cd->offset, offset64); |
1da177e4 | 933 | } |
b602345d | 934 | cd->offset = NULL; |
1da177e4 LT |
935 | } |
936 | ||
937 | /* | |
938 | dprintk("encode_entry(%.*s @%ld%s)\n", | |
939 | namlen, name, (long) offset, plus? " plus" : ""); | |
940 | */ | |
941 | ||
942 | /* truncate filename if too long */ | |
3c7aa15d | 943 | namlen = min(namlen, NFS3_MAXNAMLEN); |
1da177e4 LT |
944 | |
945 | slen = XDR_QUADLEN(namlen); | |
946 | elen = slen + NFS3_ENTRY_BAGGAGE | |
947 | + (plus? NFS3_ENTRYPLUS_BAGGAGE : 0); | |
948 | ||
949 | if (cd->buflen < elen) { | |
950 | cd->common.err = nfserr_toosmall; | |
951 | return -EINVAL; | |
952 | } | |
953 | ||
954 | /* determine which page in rq_respages[] we are currently filling */ | |
afc59400 BF |
955 | for (page = cd->rqstp->rq_respages + 1; |
956 | page < cd->rqstp->rq_next_page; page++) { | |
957 | curr_page_addr = page_address(*page); | |
1da177e4 LT |
958 | |
959 | if (((caddr_t)cd->buffer >= curr_page_addr) && | |
960 | ((caddr_t)cd->buffer < curr_page_addr + PAGE_SIZE)) | |
961 | break; | |
962 | } | |
963 | ||
964 | if ((caddr_t)(cd->buffer + elen) < (curr_page_addr + PAGE_SIZE)) { | |
965 | /* encode entry in current page */ | |
966 | ||
967 | p = encode_entry_baggage(cd, p, name, namlen, ino); | |
968 | ||
8177e6d6 | 969 | if (plus) |
43b0e7ea | 970 | p = encode_entryplus_baggage(cd, p, name, namlen, ino); |
1da177e4 | 971 | num_entry_words = p - cd->buffer; |
afc59400 | 972 | } else if (*(page+1) != NULL) { |
1da177e4 LT |
973 | /* temporarily encode entry into next page, then move back to |
974 | * current and next page in rq_respages[] */ | |
91f07168 | 975 | __be32 *p1, *tmp; |
1da177e4 LT |
976 | int len1, len2; |
977 | ||
978 | /* grab next page for temporary storage of entry */ | |
afc59400 | 979 | p1 = tmp = page_address(*(page+1)); |
1da177e4 LT |
980 | |
981 | p1 = encode_entry_baggage(cd, p1, name, namlen, ino); | |
982 | ||
8177e6d6 | 983 | if (plus) |
43b0e7ea | 984 | p1 = encode_entryplus_baggage(cd, p1, name, namlen, ino); |
1da177e4 LT |
985 | |
986 | /* determine entry word length and lengths to go in pages */ | |
987 | num_entry_words = p1 - tmp; | |
988 | len1 = curr_page_addr + PAGE_SIZE - (caddr_t)cd->buffer; | |
989 | if ((num_entry_words << 2) < len1) { | |
990 | /* the actual number of words in the entry is less | |
991 | * than elen and can still fit in the current page | |
992 | */ | |
993 | memmove(p, tmp, num_entry_words << 2); | |
994 | p += num_entry_words; | |
995 | ||
996 | /* update offset */ | |
997 | cd->offset = cd->buffer + (cd->offset - tmp); | |
998 | } else { | |
999 | unsigned int offset_r = (cd->offset - tmp) << 2; | |
1000 | ||
1001 | /* update pointer to offset location. | |
1002 | * This is a 64bit quantity, so we need to | |
1003 | * deal with 3 cases: | |
1004 | * - entirely in first page | |
1005 | * - entirely in second page | |
1006 | * - 4 bytes in each page | |
1007 | */ | |
1008 | if (offset_r + 8 <= len1) { | |
1009 | cd->offset = p + (cd->offset - tmp); | |
1010 | } else if (offset_r >= len1) { | |
1011 | cd->offset -= len1 >> 2; | |
1012 | } else { | |
1013 | /* sitting on the fence */ | |
1014 | BUG_ON(offset_r != len1 - 4); | |
1015 | cd->offset = p + (cd->offset - tmp); | |
1016 | cd->offset1 = tmp; | |
1017 | } | |
1018 | ||
1019 | len2 = (num_entry_words << 2) - len1; | |
1020 | ||
1021 | /* move from temp page to current and next pages */ | |
1022 | memmove(p, tmp, len1); | |
1023 | memmove(tmp, (caddr_t)tmp+len1, len2); | |
1024 | ||
1025 | p = tmp + (len2 >> 2); | |
1026 | } | |
1027 | } | |
1028 | else { | |
1029 | cd->common.err = nfserr_toosmall; | |
1030 | return -EINVAL; | |
1031 | } | |
1032 | ||
1033 | cd->buflen -= num_entry_words; | |
1034 | cd->buffer = p; | |
1035 | cd->common.err = nfs_ok; | |
1036 | return 0; | |
1037 | ||
1038 | } | |
1039 | ||
1040 | int | |
a0ad13ef N |
1041 | nfs3svc_encode_entry(void *cd, const char *name, |
1042 | int namlen, loff_t offset, u64 ino, unsigned int d_type) | |
1da177e4 LT |
1043 | { |
1044 | return encode_entry(cd, name, namlen, offset, ino, d_type, 0); | |
1045 | } | |
1046 | ||
1047 | int | |
a0ad13ef N |
1048 | nfs3svc_encode_entry_plus(void *cd, const char *name, |
1049 | int namlen, loff_t offset, u64 ino, | |
1050 | unsigned int d_type) | |
1da177e4 LT |
1051 | { |
1052 | return encode_entry(cd, name, namlen, offset, ino, d_type, 1); | |
1053 | } | |
1054 | ||
1055 | /* FSSTAT */ | |
1056 | int | |
63f8de37 | 1057 | nfs3svc_encode_fsstatres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 1058 | { |
63f8de37 | 1059 | struct nfsd3_fsstatres *resp = rqstp->rq_resp; |
1da177e4 LT |
1060 | struct kstatfs *s = &resp->stats; |
1061 | u64 bs = s->f_bsize; | |
1062 | ||
1063 | *p++ = xdr_zero; /* no post_op_attr */ | |
1064 | ||
1065 | if (resp->status == 0) { | |
1066 | p = xdr_encode_hyper(p, bs * s->f_blocks); /* total bytes */ | |
1067 | p = xdr_encode_hyper(p, bs * s->f_bfree); /* free bytes */ | |
1068 | p = xdr_encode_hyper(p, bs * s->f_bavail); /* user available bytes */ | |
1069 | p = xdr_encode_hyper(p, s->f_files); /* total inodes */ | |
1070 | p = xdr_encode_hyper(p, s->f_ffree); /* free inodes */ | |
1071 | p = xdr_encode_hyper(p, s->f_ffree); /* user available inodes */ | |
1072 | *p++ = htonl(resp->invarsec); /* mean unchanged time */ | |
1073 | } | |
1074 | return xdr_ressize_check(rqstp, p); | |
1075 | } | |
1076 | ||
1077 | /* FSINFO */ | |
1078 | int | |
63f8de37 | 1079 | nfs3svc_encode_fsinfores(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 1080 | { |
63f8de37 CH |
1081 | struct nfsd3_fsinfores *resp = rqstp->rq_resp; |
1082 | ||
1da177e4 LT |
1083 | *p++ = xdr_zero; /* no post_op_attr */ |
1084 | ||
1085 | if (resp->status == 0) { | |
1086 | *p++ = htonl(resp->f_rtmax); | |
1087 | *p++ = htonl(resp->f_rtpref); | |
1088 | *p++ = htonl(resp->f_rtmult); | |
1089 | *p++ = htonl(resp->f_wtmax); | |
1090 | *p++ = htonl(resp->f_wtpref); | |
1091 | *p++ = htonl(resp->f_wtmult); | |
1092 | *p++ = htonl(resp->f_dtpref); | |
1093 | p = xdr_encode_hyper(p, resp->f_maxfilesize); | |
1094 | *p++ = xdr_one; | |
1095 | *p++ = xdr_zero; | |
1096 | *p++ = htonl(resp->f_properties); | |
1097 | } | |
1098 | ||
1099 | return xdr_ressize_check(rqstp, p); | |
1100 | } | |
1101 | ||
1102 | /* PATHCONF */ | |
1103 | int | |
63f8de37 | 1104 | nfs3svc_encode_pathconfres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 1105 | { |
63f8de37 CH |
1106 | struct nfsd3_pathconfres *resp = rqstp->rq_resp; |
1107 | ||
1da177e4 LT |
1108 | *p++ = xdr_zero; /* no post_op_attr */ |
1109 | ||
1110 | if (resp->status == 0) { | |
1111 | *p++ = htonl(resp->p_link_max); | |
1112 | *p++ = htonl(resp->p_name_max); | |
1113 | *p++ = htonl(resp->p_no_trunc); | |
1114 | *p++ = htonl(resp->p_chown_restricted); | |
1115 | *p++ = htonl(resp->p_case_insensitive); | |
1116 | *p++ = htonl(resp->p_case_preserving); | |
1117 | } | |
1118 | ||
1119 | return xdr_ressize_check(rqstp, p); | |
1120 | } | |
1121 | ||
1122 | /* COMMIT */ | |
1123 | int | |
63f8de37 | 1124 | nfs3svc_encode_commitres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 1125 | { |
63f8de37 | 1126 | struct nfsd3_commitres *resp = rqstp->rq_resp; |
b9c0ef85 SK |
1127 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1128 | ||
1da177e4 LT |
1129 | p = encode_wcc_data(rqstp, p, &resp->fh); |
1130 | /* Write verifier */ | |
1131 | if (resp->status == 0) { | |
256a89fa AB |
1132 | /* unique identifier, y2038 overflow can be ignored */ |
1133 | *p++ = htonl((u32)nn->nfssvc_boot.tv_sec); | |
1134 | *p++ = htonl(nn->nfssvc_boot.tv_nsec); | |
1da177e4 LT |
1135 | } |
1136 | return xdr_ressize_check(rqstp, p); | |
1137 | } | |
1138 | ||
1139 | /* | |
1140 | * XDR release functions | |
1141 | */ | |
8537488b CH |
1142 | void |
1143 | nfs3svc_release_fhandle(struct svc_rqst *rqstp) | |
1da177e4 | 1144 | { |
8537488b CH |
1145 | struct nfsd3_attrstat *resp = rqstp->rq_resp; |
1146 | ||
1da177e4 | 1147 | fh_put(&resp->fh); |
1da177e4 LT |
1148 | } |
1149 | ||
8537488b CH |
1150 | void |
1151 | nfs3svc_release_fhandle2(struct svc_rqst *rqstp) | |
1da177e4 | 1152 | { |
8537488b CH |
1153 | struct nfsd3_fhandle_pair *resp = rqstp->rq_resp; |
1154 | ||
1da177e4 LT |
1155 | fh_put(&resp->fh1); |
1156 | fh_put(&resp->fh2); | |
1da177e4 | 1157 | } |