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Commit | Line | Data |
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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 | ||
27c438f5 | 30 | |
1da177e4 LT |
31 | /* |
32 | * XDR functions for basic NFS types | |
33 | */ | |
3ee6f61c | 34 | static __be32 * |
92c5e469 | 35 | encode_time3(__be32 *p, struct timespec64 *time) |
1da177e4 LT |
36 | { |
37 | *p++ = htonl((u32) time->tv_sec); *p++ = htonl(time->tv_nsec); | |
38 | return p; | |
39 | } | |
40 | ||
3ee6f61c | 41 | static __be32 * |
92c5e469 | 42 | decode_time3(__be32 *p, struct timespec64 *time) |
1da177e4 LT |
43 | { |
44 | time->tv_sec = ntohl(*p++); | |
45 | time->tv_nsec = ntohl(*p++); | |
46 | return p; | |
47 | } | |
48 | ||
3ee6f61c | 49 | static __be32 * |
91f07168 | 50 | decode_fh(__be32 *p, struct svc_fh *fhp) |
1da177e4 LT |
51 | { |
52 | unsigned int size; | |
53 | fh_init(fhp, NFS3_FHSIZE); | |
54 | size = ntohl(*p++); | |
55 | if (size > NFS3_FHSIZE) | |
56 | return NULL; | |
57 | ||
58 | memcpy(&fhp->fh_handle.fh_base, p, size); | |
59 | fhp->fh_handle.fh_size = size; | |
60 | return p + XDR_QUADLEN(size); | |
61 | } | |
62 | ||
a257cdd0 | 63 | /* Helper function for NFSv3 ACL code */ |
91f07168 | 64 | __be32 *nfs3svc_decode_fh(__be32 *p, struct svc_fh *fhp) |
a257cdd0 AG |
65 | { |
66 | return decode_fh(p, fhp); | |
67 | } | |
68 | ||
3ee6f61c | 69 | static __be32 * |
91f07168 | 70 | encode_fh(__be32 *p, struct svc_fh *fhp) |
1da177e4 LT |
71 | { |
72 | unsigned int size = fhp->fh_handle.fh_size; | |
73 | *p++ = htonl(size); | |
74 | if (size) p[XDR_QUADLEN(size)-1]=0; | |
75 | memcpy(p, &fhp->fh_handle.fh_base, size); | |
76 | return p + XDR_QUADLEN(size); | |
77 | } | |
78 | ||
79 | /* | |
80 | * Decode a file name and make sure that the path contains | |
81 | * no slashes or null bytes. | |
82 | */ | |
3ee6f61c | 83 | static __be32 * |
ee1a95b3 | 84 | decode_filename(__be32 *p, char **namp, unsigned int *lenp) |
1da177e4 LT |
85 | { |
86 | char *name; | |
ee1a95b3 | 87 | unsigned int i; |
1da177e4 LT |
88 | |
89 | if ((p = xdr_decode_string_inplace(p, namp, lenp, NFS3_MAXNAMLEN)) != NULL) { | |
90 | for (i = 0, name = *namp; i < *lenp; i++, name++) { | |
91 | if (*name == '\0' || *name == '/') | |
92 | return NULL; | |
93 | } | |
94 | } | |
95 | ||
96 | return p; | |
97 | } | |
98 | ||
3ee6f61c | 99 | static __be32 * |
e45d1a18 | 100 | decode_sattr3(__be32 *p, struct iattr *iap, struct user_namespace *userns) |
1da177e4 LT |
101 | { |
102 | u32 tmp; | |
103 | ||
104 | iap->ia_valid = 0; | |
105 | ||
106 | if (*p++) { | |
107 | iap->ia_valid |= ATTR_MODE; | |
108 | iap->ia_mode = ntohl(*p++); | |
109 | } | |
110 | if (*p++) { | |
e45d1a18 | 111 | iap->ia_uid = make_kuid(userns, ntohl(*p++)); |
458878a7 EB |
112 | if (uid_valid(iap->ia_uid)) |
113 | iap->ia_valid |= ATTR_UID; | |
1da177e4 LT |
114 | } |
115 | if (*p++) { | |
e45d1a18 | 116 | iap->ia_gid = make_kgid(userns, ntohl(*p++)); |
458878a7 EB |
117 | if (gid_valid(iap->ia_gid)) |
118 | iap->ia_valid |= ATTR_GID; | |
1da177e4 LT |
119 | } |
120 | if (*p++) { | |
121 | u64 newsize; | |
122 | ||
123 | iap->ia_valid |= ATTR_SIZE; | |
124 | p = xdr_decode_hyper(p, &newsize); | |
3c7aa15d | 125 | iap->ia_size = min_t(u64, newsize, NFS_OFFSET_MAX); |
1da177e4 LT |
126 | } |
127 | if ((tmp = ntohl(*p++)) == 1) { /* set to server time */ | |
128 | iap->ia_valid |= ATTR_ATIME; | |
129 | } else if (tmp == 2) { /* set to client time */ | |
130 | iap->ia_valid |= ATTR_ATIME | ATTR_ATIME_SET; | |
131 | iap->ia_atime.tv_sec = ntohl(*p++); | |
132 | iap->ia_atime.tv_nsec = ntohl(*p++); | |
133 | } | |
134 | if ((tmp = ntohl(*p++)) == 1) { /* set to server time */ | |
135 | iap->ia_valid |= ATTR_MTIME; | |
136 | } else if (tmp == 2) { /* set to client time */ | |
137 | iap->ia_valid |= ATTR_MTIME | ATTR_MTIME_SET; | |
138 | iap->ia_mtime.tv_sec = ntohl(*p++); | |
139 | iap->ia_mtime.tv_nsec = ntohl(*p++); | |
140 | } | |
141 | return p; | |
142 | } | |
143 | ||
af6a4e28 N |
144 | static __be32 *encode_fsid(__be32 *p, struct svc_fh *fhp) |
145 | { | |
146 | u64 f; | |
147 | switch(fsid_source(fhp)) { | |
148 | default: | |
149 | case FSIDSOURCE_DEV: | |
150 | p = xdr_encode_hyper(p, (u64)huge_encode_dev | |
fc64005c | 151 | (fhp->fh_dentry->d_sb->s_dev)); |
af6a4e28 N |
152 | break; |
153 | case FSIDSOURCE_FSID: | |
154 | p = xdr_encode_hyper(p, (u64) fhp->fh_export->ex_fsid); | |
155 | break; | |
156 | case FSIDSOURCE_UUID: | |
157 | f = ((u64*)fhp->fh_export->ex_uuid)[0]; | |
158 | f ^= ((u64*)fhp->fh_export->ex_uuid)[1]; | |
159 | p = xdr_encode_hyper(p, f); | |
160 | break; | |
161 | } | |
162 | return p; | |
163 | } | |
164 | ||
3ee6f61c | 165 | static __be32 * |
91f07168 | 166 | encode_fattr3(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp, |
a334de28 | 167 | struct kstat *stat) |
1da177e4 | 168 | { |
e45d1a18 | 169 | struct user_namespace *userns = nfsd_user_namespace(rqstp); |
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); |
92c5e469 AB |
185 | p = encode_time3(p, &stat->atime); |
186 | p = encode_time3(p, &stat->mtime); | |
187 | p = encode_time3(p, &stat->ctime); | |
1da177e4 LT |
188 | |
189 | return p; | |
190 | } | |
191 | ||
3ee6f61c | 192 | static __be32 * |
91f07168 | 193 | encode_saved_post_attr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp) |
1da177e4 | 194 | { |
1da177e4 LT |
195 | /* Attributes to follow */ |
196 | *p++ = xdr_one; | |
40ee5dc6 | 197 | return encode_fattr3(rqstp, p, fhp, &fhp->fh_post_attr); |
1da177e4 LT |
198 | } |
199 | ||
200 | /* | |
201 | * Encode post-operation attributes. | |
202 | * The inode may be NULL if the call failed because of a stale file | |
203 | * handle. In this case, no attributes are returned. | |
204 | */ | |
91f07168 AV |
205 | static __be32 * |
206 | encode_post_op_attr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp) | |
1da177e4 LT |
207 | { |
208 | struct dentry *dentry = fhp->fh_dentry; | |
daab110e | 209 | if (!fhp->fh_no_wcc && dentry && d_really_is_positive(dentry)) { |
3dadecce | 210 | __be32 err; |
a334de28 DS |
211 | struct kstat stat; |
212 | ||
3dadecce | 213 | err = fh_getattr(fhp, &stat); |
a334de28 DS |
214 | if (!err) { |
215 | *p++ = xdr_one; /* attributes follow */ | |
2b0143b5 | 216 | lease_get_mtime(d_inode(dentry), &stat.mtime); |
a334de28 DS |
217 | return encode_fattr3(rqstp, p, fhp, &stat); |
218 | } | |
1da177e4 LT |
219 | } |
220 | *p++ = xdr_zero; | |
221 | return p; | |
222 | } | |
223 | ||
a257cdd0 | 224 | /* Helper for NFSv3 ACLs */ |
91f07168 AV |
225 | __be32 * |
226 | nfs3svc_encode_post_op_attr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp) | |
a257cdd0 AG |
227 | { |
228 | return encode_post_op_attr(rqstp, p, fhp); | |
229 | } | |
230 | ||
1da177e4 LT |
231 | /* |
232 | * Enocde weak cache consistency data | |
233 | */ | |
91f07168 AV |
234 | static __be32 * |
235 | encode_wcc_data(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp) | |
1da177e4 LT |
236 | { |
237 | struct dentry *dentry = fhp->fh_dentry; | |
238 | ||
2b0143b5 | 239 | if (dentry && d_really_is_positive(dentry) && fhp->fh_post_saved) { |
1da177e4 LT |
240 | if (fhp->fh_pre_saved) { |
241 | *p++ = xdr_one; | |
242 | p = xdr_encode_hyper(p, (u64) fhp->fh_pre_size); | |
243 | p = encode_time3(p, &fhp->fh_pre_mtime); | |
244 | p = encode_time3(p, &fhp->fh_pre_ctime); | |
245 | } else { | |
246 | *p++ = xdr_zero; | |
247 | } | |
248 | return encode_saved_post_attr(rqstp, p, fhp); | |
249 | } | |
250 | /* no pre- or post-attrs */ | |
251 | *p++ = xdr_zero; | |
252 | return encode_post_op_attr(rqstp, p, fhp); | |
253 | } | |
254 | ||
39ca1bf6 AG |
255 | /* |
256 | * Fill in the pre_op attr for the wcc data | |
257 | */ | |
258 | void fill_pre_wcc(struct svc_fh *fhp) | |
259 | { | |
260 | struct inode *inode; | |
261 | struct kstat stat; | |
942b20dc | 262 | bool v4 = (fhp->fh_maxsize == NFS4_FHSIZE); |
39ca1bf6 AG |
263 | __be32 err; |
264 | ||
daab110e | 265 | if (fhp->fh_no_wcc || fhp->fh_pre_saved) |
39ca1bf6 | 266 | return; |
39ca1bf6 AG |
267 | inode = d_inode(fhp->fh_dentry); |
268 | err = fh_getattr(fhp, &stat); | |
269 | if (err) { | |
270 | /* Grab the times from inode anyway */ | |
271 | stat.mtime = inode->i_mtime; | |
272 | stat.ctime = inode->i_ctime; | |
273 | stat.size = inode->i_size; | |
274 | } | |
942b20dc BF |
275 | if (v4) |
276 | fhp->fh_pre_change = nfsd4_change_attribute(&stat, inode); | |
39ca1bf6 | 277 | |
92c5e469 AB |
278 | fhp->fh_pre_mtime = stat.mtime; |
279 | fhp->fh_pre_ctime = stat.ctime; | |
39ca1bf6 | 280 | fhp->fh_pre_size = stat.size; |
39ca1bf6 AG |
281 | fhp->fh_pre_saved = true; |
282 | } | |
283 | ||
40ee5dc6 PS |
284 | /* |
285 | * Fill in the post_op attr for the wcc data | |
286 | */ | |
287 | void fill_post_wcc(struct svc_fh *fhp) | |
288 | { | |
942b20dc BF |
289 | bool v4 = (fhp->fh_maxsize == NFS4_FHSIZE); |
290 | struct inode *inode = d_inode(fhp->fh_dentry); | |
3dadecce | 291 | __be32 err; |
40ee5dc6 | 292 | |
daab110e JL |
293 | if (fhp->fh_no_wcc) |
294 | return; | |
295 | ||
40ee5dc6 PS |
296 | if (fhp->fh_post_saved) |
297 | printk("nfsd: inode locked twice during operation.\n"); | |
298 | ||
3dadecce | 299 | err = fh_getattr(fhp, &fhp->fh_post_attr); |
c1ac3ffc | 300 | if (err) { |
aaf91ec1 | 301 | fhp->fh_post_saved = false; |
942b20dc | 302 | fhp->fh_post_attr.ctime = inode->i_ctime; |
c1ac3ffc | 303 | } else |
aaf91ec1 | 304 | fhp->fh_post_saved = true; |
942b20dc BF |
305 | if (v4) |
306 | fhp->fh_post_change = | |
307 | nfsd4_change_attribute(&fhp->fh_post_attr, inode); | |
40ee5dc6 | 308 | } |
1da177e4 LT |
309 | |
310 | /* | |
311 | * XDR decode functions | |
312 | */ | |
dcc46991 | 313 | |
1da177e4 | 314 | int |
026fec7e | 315 | nfs3svc_decode_fhandle(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 316 | { |
026fec7e CH |
317 | struct nfsd_fhandle *args = rqstp->rq_argp; |
318 | ||
d40aa337 BT |
319 | p = decode_fh(p, &args->fh); |
320 | if (!p) | |
1da177e4 LT |
321 | return 0; |
322 | return xdr_argsize_check(rqstp, p); | |
323 | } | |
324 | ||
325 | int | |
026fec7e | 326 | nfs3svc_decode_sattrargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 327 | { |
026fec7e CH |
328 | struct nfsd3_sattrargs *args = rqstp->rq_argp; |
329 | ||
d40aa337 BT |
330 | p = decode_fh(p, &args->fh); |
331 | if (!p) | |
1da177e4 | 332 | return 0; |
e45d1a18 | 333 | p = decode_sattr3(p, &args->attrs, nfsd_user_namespace(rqstp)); |
1da177e4 LT |
334 | |
335 | if ((args->check_guard = ntohl(*p++)) != 0) { | |
92c5e469 | 336 | struct timespec64 time; |
1da177e4 LT |
337 | p = decode_time3(p, &time); |
338 | args->guardtime = time.tv_sec; | |
339 | } | |
340 | ||
341 | return xdr_argsize_check(rqstp, p); | |
342 | } | |
343 | ||
344 | int | |
026fec7e | 345 | nfs3svc_decode_diropargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 346 | { |
026fec7e CH |
347 | struct nfsd3_diropargs *args = rqstp->rq_argp; |
348 | ||
1da177e4 LT |
349 | if (!(p = decode_fh(p, &args->fh)) |
350 | || !(p = decode_filename(p, &args->name, &args->len))) | |
351 | return 0; | |
352 | ||
353 | return xdr_argsize_check(rqstp, p); | |
354 | } | |
355 | ||
356 | int | |
026fec7e | 357 | nfs3svc_decode_accessargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 358 | { |
026fec7e CH |
359 | struct nfsd3_accessargs *args = rqstp->rq_argp; |
360 | ||
d40aa337 BT |
361 | p = decode_fh(p, &args->fh); |
362 | if (!p) | |
1da177e4 LT |
363 | return 0; |
364 | args->access = ntohl(*p++); | |
365 | ||
366 | return xdr_argsize_check(rqstp, p); | |
367 | } | |
368 | ||
369 | int | |
026fec7e | 370 | nfs3svc_decode_readargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 371 | { |
026fec7e | 372 | struct nfsd3_readargs *args = rqstp->rq_argp; |
1da177e4 | 373 | unsigned int len; |
afc59400 | 374 | int v; |
7adae489 | 375 | u32 max_blocksize = svc_max_payload(rqstp); |
1da177e4 | 376 | |
d40aa337 BT |
377 | p = decode_fh(p, &args->fh); |
378 | if (!p) | |
1da177e4 | 379 | return 0; |
072f62ed | 380 | p = xdr_decode_hyper(p, &args->offset); |
51f56777 | 381 | |
9512a16b | 382 | args->count = ntohl(*p++); |
3c7aa15d | 383 | len = min(args->count, max_blocksize); |
1da177e4 LT |
384 | |
385 | /* set up the kvec */ | |
386 | v=0; | |
387 | while (len > 0) { | |
afc59400 BF |
388 | struct page *p = *(rqstp->rq_next_page++); |
389 | ||
390 | rqstp->rq_vec[v].iov_base = page_address(p); | |
3c7aa15d | 391 | rqstp->rq_vec[v].iov_len = min_t(unsigned int, len, PAGE_SIZE); |
3cc03b16 | 392 | len -= rqstp->rq_vec[v].iov_len; |
1da177e4 LT |
393 | v++; |
394 | } | |
395 | args->vlen = v; | |
9512a16b | 396 | return xdr_argsize_check(rqstp, p); |
1da177e4 LT |
397 | } |
398 | ||
399 | int | |
026fec7e | 400 | nfs3svc_decode_writeargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 401 | { |
026fec7e | 402 | struct nfsd3_writeargs *args = rqstp->rq_argp; |
8154ef27 | 403 | unsigned int len, hdr, dlen; |
7adae489 | 404 | u32 max_blocksize = svc_max_payload(rqstp); |
db44bac4 BF |
405 | struct kvec *head = rqstp->rq_arg.head; |
406 | struct kvec *tail = rqstp->rq_arg.tail; | |
1da177e4 | 407 | |
d40aa337 BT |
408 | p = decode_fh(p, &args->fh); |
409 | if (!p) | |
1da177e4 | 410 | return 0; |
072f62ed | 411 | p = xdr_decode_hyper(p, &args->offset); |
1da177e4 LT |
412 | |
413 | args->count = ntohl(*p++); | |
414 | args->stable = ntohl(*p++); | |
415 | len = args->len = ntohl(*p++); | |
13bf9fbf BF |
416 | if ((void *)p > head->iov_base + head->iov_len) |
417 | return 0; | |
f34b9568 PS |
418 | /* |
419 | * The count must equal the amount of data passed. | |
420 | */ | |
421 | if (args->count != args->len) | |
422 | return 0; | |
1da177e4 | 423 | |
f34b9568 PS |
424 | /* |
425 | * Check to make sure that we got the right number of | |
426 | * bytes. | |
f34b9568 | 427 | */ |
db44bac4 BF |
428 | hdr = (void*)p - head->iov_base; |
429 | dlen = head->iov_len + rqstp->rq_arg.page_len + tail->iov_len - hdr; | |
f34b9568 PS |
430 | /* |
431 | * Round the length of the data which was specified up to | |
432 | * the next multiple of XDR units and then compare that | |
433 | * against the length which was actually received. | |
ba67a39e N |
434 | * Note that when RPCSEC/GSS (for example) is used, the |
435 | * data buffer can be padded so dlen might be larger | |
436 | * than required. It must never be smaller. | |
f34b9568 | 437 | */ |
ba67a39e | 438 | if (dlen < XDR_QUADLEN(len)*4) |
1da177e4 LT |
439 | return 0; |
440 | ||
f34b9568 PS |
441 | if (args->count > max_blocksize) { |
442 | args->count = max_blocksize; | |
443 | len = args->len = max_blocksize; | |
444 | } | |
8154ef27 CL |
445 | |
446 | args->first.iov_base = (void *)p; | |
447 | args->first.iov_len = head->iov_len - hdr; | |
f34b9568 | 448 | return 1; |
1da177e4 LT |
449 | } |
450 | ||
451 | int | |
026fec7e | 452 | nfs3svc_decode_createargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 453 | { |
026fec7e CH |
454 | struct nfsd3_createargs *args = rqstp->rq_argp; |
455 | ||
1da177e4 LT |
456 | if (!(p = decode_fh(p, &args->fh)) |
457 | || !(p = decode_filename(p, &args->name, &args->len))) | |
458 | return 0; | |
459 | ||
460 | switch (args->createmode = ntohl(*p++)) { | |
461 | case NFS3_CREATE_UNCHECKED: | |
462 | case NFS3_CREATE_GUARDED: | |
e45d1a18 | 463 | p = decode_sattr3(p, &args->attrs, nfsd_user_namespace(rqstp)); |
1da177e4 LT |
464 | break; |
465 | case NFS3_CREATE_EXCLUSIVE: | |
466 | args->verf = p; | |
467 | p += 2; | |
468 | break; | |
469 | default: | |
470 | return 0; | |
471 | } | |
472 | ||
473 | return xdr_argsize_check(rqstp, p); | |
474 | } | |
026fec7e | 475 | |
1da177e4 | 476 | int |
026fec7e | 477 | nfs3svc_decode_mkdirargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 478 | { |
026fec7e CH |
479 | struct nfsd3_createargs *args = rqstp->rq_argp; |
480 | ||
072f62ed N |
481 | if (!(p = decode_fh(p, &args->fh)) || |
482 | !(p = decode_filename(p, &args->name, &args->len))) | |
1da177e4 | 483 | return 0; |
e45d1a18 | 484 | p = decode_sattr3(p, &args->attrs, nfsd_user_namespace(rqstp)); |
1da177e4 LT |
485 | |
486 | return xdr_argsize_check(rqstp, p); | |
487 | } | |
488 | ||
489 | int | |
026fec7e | 490 | nfs3svc_decode_symlinkargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 491 | { |
026fec7e | 492 | struct nfsd3_symlinkargs *args = rqstp->rq_argp; |
38a70315 CL |
493 | char *base = (char *)p; |
494 | size_t dlen; | |
1da177e4 | 495 | |
072f62ed | 496 | if (!(p = decode_fh(p, &args->ffh)) || |
38a70315 | 497 | !(p = decode_filename(p, &args->fname, &args->flen))) |
1da177e4 | 498 | return 0; |
e45d1a18 | 499 | p = decode_sattr3(p, &args->attrs, nfsd_user_namespace(rqstp)); |
072f62ed | 500 | |
38a70315 | 501 | args->tlen = ntohl(*p++); |
1da177e4 | 502 | |
38a70315 CL |
503 | args->first.iov_base = p; |
504 | args->first.iov_len = rqstp->rq_arg.head[0].iov_len; | |
505 | args->first.iov_len -= (char *)p - base; | |
506 | ||
507 | dlen = args->first.iov_len + rqstp->rq_arg.page_len + | |
508 | rqstp->rq_arg.tail[0].iov_len; | |
509 | if (dlen < XDR_QUADLEN(args->tlen) << 2) | |
510 | return 0; | |
1da177e4 LT |
511 | return 1; |
512 | } | |
513 | ||
514 | int | |
026fec7e | 515 | nfs3svc_decode_mknodargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 516 | { |
026fec7e CH |
517 | struct nfsd3_mknodargs *args = rqstp->rq_argp; |
518 | ||
1da177e4 LT |
519 | if (!(p = decode_fh(p, &args->fh)) |
520 | || !(p = decode_filename(p, &args->name, &args->len))) | |
521 | return 0; | |
522 | ||
523 | args->ftype = ntohl(*p++); | |
524 | ||
525 | if (args->ftype == NF3BLK || args->ftype == NF3CHR | |
072f62ed | 526 | || args->ftype == NF3SOCK || args->ftype == NF3FIFO) |
e45d1a18 | 527 | p = decode_sattr3(p, &args->attrs, nfsd_user_namespace(rqstp)); |
1da177e4 LT |
528 | |
529 | if (args->ftype == NF3BLK || args->ftype == NF3CHR) { | |
530 | args->major = ntohl(*p++); | |
531 | args->minor = ntohl(*p++); | |
532 | } | |
533 | ||
534 | return xdr_argsize_check(rqstp, p); | |
535 | } | |
536 | ||
537 | int | |
026fec7e | 538 | nfs3svc_decode_renameargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 539 | { |
026fec7e CH |
540 | struct nfsd3_renameargs *args = rqstp->rq_argp; |
541 | ||
1da177e4 LT |
542 | if (!(p = decode_fh(p, &args->ffh)) |
543 | || !(p = decode_filename(p, &args->fname, &args->flen)) | |
544 | || !(p = decode_fh(p, &args->tfh)) | |
545 | || !(p = decode_filename(p, &args->tname, &args->tlen))) | |
546 | return 0; | |
547 | ||
548 | return xdr_argsize_check(rqstp, p); | |
549 | } | |
550 | ||
551 | int | |
026fec7e | 552 | nfs3svc_decode_readlinkargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 553 | { |
026fec7e CH |
554 | struct nfsd3_readlinkargs *args = rqstp->rq_argp; |
555 | ||
d40aa337 BT |
556 | p = decode_fh(p, &args->fh); |
557 | if (!p) | |
1da177e4 | 558 | return 0; |
afc59400 | 559 | args->buffer = page_address(*(rqstp->rq_next_page++)); |
1da177e4 | 560 | |
9512a16b | 561 | return xdr_argsize_check(rqstp, p); |
1da177e4 LT |
562 | } |
563 | ||
564 | int | |
026fec7e | 565 | nfs3svc_decode_linkargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 566 | { |
026fec7e CH |
567 | struct nfsd3_linkargs *args = rqstp->rq_argp; |
568 | ||
1da177e4 LT |
569 | if (!(p = decode_fh(p, &args->ffh)) |
570 | || !(p = decode_fh(p, &args->tfh)) | |
571 | || !(p = decode_filename(p, &args->tname, &args->tlen))) | |
572 | return 0; | |
573 | ||
574 | return xdr_argsize_check(rqstp, p); | |
575 | } | |
576 | ||
577 | int | |
026fec7e | 578 | nfs3svc_decode_readdirargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 579 | { |
026fec7e | 580 | struct nfsd3_readdirargs *args = rqstp->rq_argp; |
3c86794a | 581 | int len; |
f875a792 N |
582 | u32 max_blocksize = svc_max_payload(rqstp); |
583 | ||
d40aa337 BT |
584 | p = decode_fh(p, &args->fh); |
585 | if (!p) | |
1da177e4 LT |
586 | return 0; |
587 | p = xdr_decode_hyper(p, &args->cookie); | |
588 | args->verf = p; p += 2; | |
589 | args->dircount = ~0; | |
590 | args->count = ntohl(*p++); | |
3c86794a MZ |
591 | len = args->count = min_t(u32, args->count, max_blocksize); |
592 | ||
593 | while (len > 0) { | |
594 | struct page *p = *(rqstp->rq_next_page++); | |
595 | if (!args->buffer) | |
596 | args->buffer = page_address(p); | |
597 | len -= PAGE_SIZE; | |
598 | } | |
1da177e4 | 599 | |
9512a16b | 600 | return xdr_argsize_check(rqstp, p); |
1da177e4 LT |
601 | } |
602 | ||
603 | int | |
026fec7e | 604 | nfs3svc_decode_readdirplusargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 605 | { |
026fec7e | 606 | struct nfsd3_readdirargs *args = rqstp->rq_argp; |
afc59400 | 607 | int len; |
7adae489 | 608 | u32 max_blocksize = svc_max_payload(rqstp); |
1da177e4 | 609 | |
d40aa337 BT |
610 | p = decode_fh(p, &args->fh); |
611 | if (!p) | |
1da177e4 LT |
612 | return 0; |
613 | p = xdr_decode_hyper(p, &args->cookie); | |
614 | args->verf = p; p += 2; | |
615 | args->dircount = ntohl(*p++); | |
616 | args->count = ntohl(*p++); | |
617 | ||
3c7aa15d | 618 | len = args->count = min(args->count, max_blocksize); |
1da177e4 | 619 | while (len > 0) { |
afc59400 | 620 | struct page *p = *(rqstp->rq_next_page++); |
1da177e4 | 621 | if (!args->buffer) |
afc59400 | 622 | args->buffer = page_address(p); |
1da177e4 LT |
623 | len -= PAGE_SIZE; |
624 | } | |
9512a16b BF |
625 | |
626 | return xdr_argsize_check(rqstp, p); | |
1da177e4 LT |
627 | } |
628 | ||
629 | int | |
026fec7e | 630 | nfs3svc_decode_commitargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 631 | { |
026fec7e | 632 | struct nfsd3_commitargs *args = rqstp->rq_argp; |
d40aa337 BT |
633 | p = decode_fh(p, &args->fh); |
634 | if (!p) | |
1da177e4 LT |
635 | return 0; |
636 | p = xdr_decode_hyper(p, &args->offset); | |
637 | args->count = ntohl(*p++); | |
638 | ||
639 | return xdr_argsize_check(rqstp, p); | |
640 | } | |
641 | ||
642 | /* | |
643 | * XDR encode functions | |
644 | */ | |
cc028a10 | 645 | |
1da177e4 LT |
646 | /* GETATTR */ |
647 | int | |
63f8de37 | 648 | nfs3svc_encode_attrstat(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 649 | { |
63f8de37 CH |
650 | struct nfsd3_attrstat *resp = rqstp->rq_resp; |
651 | ||
cc028a10 | 652 | *p++ = resp->status; |
40ee5dc6 | 653 | if (resp->status == 0) { |
2b0143b5 | 654 | lease_get_mtime(d_inode(resp->fh.fh_dentry), |
40ee5dc6 | 655 | &resp->stat.mtime); |
a334de28 | 656 | p = encode_fattr3(rqstp, p, &resp->fh, &resp->stat); |
40ee5dc6 | 657 | } |
1da177e4 LT |
658 | return xdr_ressize_check(rqstp, p); |
659 | } | |
660 | ||
661 | /* SETATTR, REMOVE, RMDIR */ | |
662 | int | |
63f8de37 | 663 | nfs3svc_encode_wccstat(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 664 | { |
63f8de37 CH |
665 | struct nfsd3_attrstat *resp = rqstp->rq_resp; |
666 | ||
cc028a10 | 667 | *p++ = resp->status; |
1da177e4 LT |
668 | p = encode_wcc_data(rqstp, p, &resp->fh); |
669 | return xdr_ressize_check(rqstp, p); | |
670 | } | |
671 | ||
672 | /* LOOKUP */ | |
673 | int | |
63f8de37 | 674 | nfs3svc_encode_diropres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 675 | { |
63f8de37 CH |
676 | struct nfsd3_diropres *resp = rqstp->rq_resp; |
677 | ||
cc028a10 | 678 | *p++ = resp->status; |
1da177e4 LT |
679 | if (resp->status == 0) { |
680 | p = encode_fh(p, &resp->fh); | |
681 | p = encode_post_op_attr(rqstp, p, &resp->fh); | |
682 | } | |
683 | p = encode_post_op_attr(rqstp, p, &resp->dirfh); | |
684 | return xdr_ressize_check(rqstp, p); | |
685 | } | |
686 | ||
687 | /* ACCESS */ | |
688 | int | |
63f8de37 | 689 | nfs3svc_encode_accessres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 690 | { |
63f8de37 CH |
691 | struct nfsd3_accessres *resp = rqstp->rq_resp; |
692 | ||
cc028a10 | 693 | *p++ = resp->status; |
1da177e4 LT |
694 | p = encode_post_op_attr(rqstp, p, &resp->fh); |
695 | if (resp->status == 0) | |
696 | *p++ = htonl(resp->access); | |
697 | return xdr_ressize_check(rqstp, p); | |
698 | } | |
699 | ||
700 | /* READLINK */ | |
701 | int | |
63f8de37 | 702 | nfs3svc_encode_readlinkres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 703 | { |
63f8de37 | 704 | struct nfsd3_readlinkres *resp = rqstp->rq_resp; |
76e5492b | 705 | struct kvec *head = rqstp->rq_res.head; |
63f8de37 | 706 | |
cc028a10 | 707 | *p++ = resp->status; |
1da177e4 LT |
708 | p = encode_post_op_attr(rqstp, p, &resp->fh); |
709 | if (resp->status == 0) { | |
710 | *p++ = htonl(resp->len); | |
711 | xdr_ressize_check(rqstp, p); | |
712 | rqstp->rq_res.page_len = resp->len; | |
713 | if (resp->len & 3) { | |
714 | /* need to pad the tail */ | |
1da177e4 LT |
715 | rqstp->rq_res.tail[0].iov_base = p; |
716 | *p = 0; | |
717 | rqstp->rq_res.tail[0].iov_len = 4 - (resp->len&3); | |
718 | } | |
76e5492b CL |
719 | if (svc_encode_result_payload(rqstp, head->iov_len, resp->len)) |
720 | return 0; | |
1da177e4 LT |
721 | return 1; |
722 | } else | |
723 | return xdr_ressize_check(rqstp, p); | |
724 | } | |
725 | ||
726 | /* READ */ | |
727 | int | |
63f8de37 | 728 | nfs3svc_encode_readres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 729 | { |
63f8de37 | 730 | struct nfsd3_readres *resp = rqstp->rq_resp; |
76e5492b | 731 | struct kvec *head = rqstp->rq_res.head; |
63f8de37 | 732 | |
cc028a10 | 733 | *p++ = resp->status; |
1da177e4 LT |
734 | p = encode_post_op_attr(rqstp, p, &resp->fh); |
735 | if (resp->status == 0) { | |
736 | *p++ = htonl(resp->count); | |
737 | *p++ = htonl(resp->eof); | |
738 | *p++ = htonl(resp->count); /* xdr opaque count */ | |
739 | xdr_ressize_check(rqstp, p); | |
25985edc | 740 | /* now update rqstp->rq_res to reflect data as well */ |
1da177e4 LT |
741 | rqstp->rq_res.page_len = resp->count; |
742 | if (resp->count & 3) { | |
743 | /* need to pad the tail */ | |
1da177e4 LT |
744 | rqstp->rq_res.tail[0].iov_base = p; |
745 | *p = 0; | |
746 | rqstp->rq_res.tail[0].iov_len = 4 - (resp->count & 3); | |
747 | } | |
76e5492b CL |
748 | if (svc_encode_result_payload(rqstp, head->iov_len, |
749 | resp->count)) | |
750 | return 0; | |
1da177e4 LT |
751 | return 1; |
752 | } else | |
753 | return xdr_ressize_check(rqstp, p); | |
754 | } | |
755 | ||
756 | /* WRITE */ | |
757 | int | |
63f8de37 | 758 | nfs3svc_encode_writeres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 759 | { |
63f8de37 | 760 | struct nfsd3_writeres *resp = rqstp->rq_resp; |
b9c0ef85 | 761 | |
cc028a10 | 762 | *p++ = resp->status; |
1da177e4 LT |
763 | p = encode_wcc_data(rqstp, p, &resp->fh); |
764 | if (resp->status == 0) { | |
765 | *p++ = htonl(resp->count); | |
766 | *p++ = htonl(resp->committed); | |
19e0663f TM |
767 | *p++ = resp->verf[0]; |
768 | *p++ = resp->verf[1]; | |
1da177e4 LT |
769 | } |
770 | return xdr_ressize_check(rqstp, p); | |
771 | } | |
772 | ||
773 | /* CREATE, MKDIR, SYMLINK, MKNOD */ | |
774 | int | |
63f8de37 | 775 | nfs3svc_encode_createres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 776 | { |
63f8de37 CH |
777 | struct nfsd3_diropres *resp = rqstp->rq_resp; |
778 | ||
cc028a10 | 779 | *p++ = resp->status; |
1da177e4 LT |
780 | if (resp->status == 0) { |
781 | *p++ = xdr_one; | |
782 | p = encode_fh(p, &resp->fh); | |
783 | p = encode_post_op_attr(rqstp, p, &resp->fh); | |
784 | } | |
785 | p = encode_wcc_data(rqstp, p, &resp->dirfh); | |
786 | return xdr_ressize_check(rqstp, p); | |
787 | } | |
788 | ||
789 | /* RENAME */ | |
790 | int | |
63f8de37 | 791 | nfs3svc_encode_renameres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 792 | { |
63f8de37 CH |
793 | struct nfsd3_renameres *resp = rqstp->rq_resp; |
794 | ||
cc028a10 | 795 | *p++ = resp->status; |
1da177e4 LT |
796 | p = encode_wcc_data(rqstp, p, &resp->ffh); |
797 | p = encode_wcc_data(rqstp, p, &resp->tfh); | |
798 | return xdr_ressize_check(rqstp, p); | |
799 | } | |
800 | ||
801 | /* LINK */ | |
802 | int | |
63f8de37 | 803 | nfs3svc_encode_linkres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 804 | { |
63f8de37 CH |
805 | struct nfsd3_linkres *resp = rqstp->rq_resp; |
806 | ||
cc028a10 | 807 | *p++ = resp->status; |
1da177e4 LT |
808 | p = encode_post_op_attr(rqstp, p, &resp->fh); |
809 | p = encode_wcc_data(rqstp, p, &resp->tfh); | |
810 | return xdr_ressize_check(rqstp, p); | |
811 | } | |
812 | ||
813 | /* READDIR */ | |
814 | int | |
63f8de37 | 815 | nfs3svc_encode_readdirres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 816 | { |
63f8de37 CH |
817 | struct nfsd3_readdirres *resp = rqstp->rq_resp; |
818 | ||
cc028a10 | 819 | *p++ = resp->status; |
1da177e4 LT |
820 | p = encode_post_op_attr(rqstp, p, &resp->fh); |
821 | ||
822 | if (resp->status == 0) { | |
823 | /* stupid readdir cookie */ | |
824 | memcpy(p, resp->verf, 8); p += 2; | |
825 | xdr_ressize_check(rqstp, p); | |
826 | if (rqstp->rq_res.head[0].iov_len + (2<<2) > PAGE_SIZE) | |
827 | return 1; /*No room for trailer */ | |
828 | rqstp->rq_res.page_len = (resp->count) << 2; | |
829 | ||
830 | /* add the 'tail' to the end of the 'head' page - page 0. */ | |
1da177e4 LT |
831 | rqstp->rq_res.tail[0].iov_base = p; |
832 | *p++ = 0; /* no more entries */ | |
833 | *p++ = htonl(resp->common.err == nfserr_eof); | |
834 | rqstp->rq_res.tail[0].iov_len = 2<<2; | |
835 | return 1; | |
836 | } else | |
837 | return xdr_ressize_check(rqstp, p); | |
838 | } | |
839 | ||
3ee6f61c | 840 | static __be32 * |
91f07168 | 841 | encode_entry_baggage(struct nfsd3_readdirres *cd, __be32 *p, const char *name, |
40ee5dc6 | 842 | int namlen, u64 ino) |
1da177e4 LT |
843 | { |
844 | *p++ = xdr_one; /* mark entry present */ | |
845 | p = xdr_encode_hyper(p, ino); /* file id */ | |
846 | p = xdr_encode_array(p, name, namlen);/* name length & name */ | |
847 | ||
848 | cd->offset = p; /* remember pointer */ | |
849 | p = xdr_encode_hyper(p, NFS_OFFSET_MAX);/* offset of next entry */ | |
850 | ||
851 | return p; | |
852 | } | |
853 | ||
efe39651 | 854 | static __be32 |
1da177e4 | 855 | compose_entry_fh(struct nfsd3_readdirres *cd, struct svc_fh *fhp, |
43b0e7ea | 856 | const char *name, int namlen, u64 ino) |
1da177e4 LT |
857 | { |
858 | struct svc_export *exp; | |
859 | struct dentry *dparent, *dchild; | |
efe39651 | 860 | __be32 rv = nfserr_noent; |
1da177e4 LT |
861 | |
862 | dparent = cd->fh.fh_dentry; | |
863 | exp = cd->fh.fh_export; | |
864 | ||
1da177e4 LT |
865 | if (isdotent(name, namlen)) { |
866 | if (namlen == 2) { | |
867 | dchild = dget_parent(dparent); | |
efe39651 AV |
868 | /* filesystem root - cannot return filehandle for ".." */ |
869 | if (dchild == dparent) | |
870 | goto out; | |
1da177e4 LT |
871 | } else |
872 | dchild = dget(dparent); | |
873 | } else | |
6c2d4798 | 874 | dchild = lookup_positive_unlocked(name, dparent, namlen); |
1da177e4 | 875 | if (IS_ERR(dchild)) |
efe39651 | 876 | return rv; |
8177e6d6 BF |
877 | if (d_mountpoint(dchild)) |
878 | goto out; | |
43b0e7ea N |
879 | if (dchild->d_inode->i_ino != ino) |
880 | goto out; | |
efe39651 | 881 | rv = fh_compose(fhp, exp, dchild, &cd->fh); |
8177e6d6 | 882 | out: |
1da177e4 LT |
883 | dput(dchild); |
884 | return rv; | |
885 | } | |
886 | ||
43b0e7ea | 887 | static __be32 *encode_entryplus_baggage(struct nfsd3_readdirres *cd, __be32 *p, const char *name, int namlen, u64 ino) |
8177e6d6 | 888 | { |
068c34c0 | 889 | struct svc_fh *fh = &cd->scratch; |
efe39651 | 890 | __be32 err; |
8177e6d6 | 891 | |
068c34c0 | 892 | fh_init(fh, NFS3_FHSIZE); |
43b0e7ea | 893 | err = compose_entry_fh(cd, fh, name, namlen, ino); |
8177e6d6 BF |
894 | if (err) { |
895 | *p++ = 0; | |
896 | *p++ = 0; | |
aed100fa | 897 | goto out; |
8177e6d6 | 898 | } |
068c34c0 | 899 | p = encode_post_op_attr(cd->rqstp, p, fh); |
8177e6d6 | 900 | *p++ = xdr_one; /* yes, a file handle follows */ |
068c34c0 | 901 | p = encode_fh(p, fh); |
aed100fa | 902 | out: |
068c34c0 | 903 | fh_put(fh); |
8177e6d6 BF |
904 | return p; |
905 | } | |
906 | ||
1da177e4 LT |
907 | /* |
908 | * Encode a directory entry. This one works for both normal readdir | |
909 | * and readdirplus. | |
910 | * The normal readdir reply requires 2 (fileid) + 1 (stringlen) | |
911 | * + string + 2 (cookie) + 1 (next) words, i.e. 6 + strlen. | |
912 | * | |
913 | * The readdirplus baggage is 1+21 words for post_op_attr, plus the | |
914 | * file handle. | |
915 | */ | |
916 | ||
917 | #define NFS3_ENTRY_BAGGAGE (2 + 1 + 2 + 1) | |
918 | #define NFS3_ENTRYPLUS_BAGGAGE (1 + 21 + 1 + (NFS3_FHSIZE >> 2)) | |
919 | static int | |
598b9a56 | 920 | encode_entry(struct readdir_cd *ccd, const char *name, int namlen, |
40ee5dc6 | 921 | loff_t offset, u64 ino, unsigned int d_type, int plus) |
1da177e4 LT |
922 | { |
923 | struct nfsd3_readdirres *cd = container_of(ccd, struct nfsd3_readdirres, | |
924 | common); | |
91f07168 | 925 | __be32 *p = cd->buffer; |
1da177e4 | 926 | caddr_t curr_page_addr = NULL; |
afc59400 | 927 | struct page ** page; |
1da177e4 LT |
928 | int slen; /* string (name) length */ |
929 | int elen; /* estimated entry length in words */ | |
930 | int num_entry_words = 0; /* actual number of words */ | |
931 | ||
932 | if (cd->offset) { | |
933 | u64 offset64 = offset; | |
934 | ||
935 | if (unlikely(cd->offset1)) { | |
936 | /* we ended up with offset on a page boundary */ | |
937 | *cd->offset = htonl(offset64 >> 32); | |
938 | *cd->offset1 = htonl(offset64 & 0xffffffff); | |
939 | cd->offset1 = NULL; | |
940 | } else { | |
598b9a56 | 941 | xdr_encode_hyper(cd->offset, offset64); |
1da177e4 | 942 | } |
b602345d | 943 | cd->offset = NULL; |
1da177e4 LT |
944 | } |
945 | ||
946 | /* | |
947 | dprintk("encode_entry(%.*s @%ld%s)\n", | |
948 | namlen, name, (long) offset, plus? " plus" : ""); | |
949 | */ | |
950 | ||
951 | /* truncate filename if too long */ | |
3c7aa15d | 952 | namlen = min(namlen, NFS3_MAXNAMLEN); |
1da177e4 LT |
953 | |
954 | slen = XDR_QUADLEN(namlen); | |
955 | elen = slen + NFS3_ENTRY_BAGGAGE | |
956 | + (plus? NFS3_ENTRYPLUS_BAGGAGE : 0); | |
957 | ||
958 | if (cd->buflen < elen) { | |
959 | cd->common.err = nfserr_toosmall; | |
960 | return -EINVAL; | |
961 | } | |
962 | ||
963 | /* determine which page in rq_respages[] we are currently filling */ | |
afc59400 BF |
964 | for (page = cd->rqstp->rq_respages + 1; |
965 | page < cd->rqstp->rq_next_page; page++) { | |
966 | curr_page_addr = page_address(*page); | |
1da177e4 LT |
967 | |
968 | if (((caddr_t)cd->buffer >= curr_page_addr) && | |
969 | ((caddr_t)cd->buffer < curr_page_addr + PAGE_SIZE)) | |
970 | break; | |
971 | } | |
972 | ||
973 | if ((caddr_t)(cd->buffer + elen) < (curr_page_addr + PAGE_SIZE)) { | |
974 | /* encode entry in current page */ | |
975 | ||
976 | p = encode_entry_baggage(cd, p, name, namlen, ino); | |
977 | ||
8177e6d6 | 978 | if (plus) |
43b0e7ea | 979 | p = encode_entryplus_baggage(cd, p, name, namlen, ino); |
1da177e4 | 980 | num_entry_words = p - cd->buffer; |
afc59400 | 981 | } else if (*(page+1) != NULL) { |
1da177e4 LT |
982 | /* temporarily encode entry into next page, then move back to |
983 | * current and next page in rq_respages[] */ | |
91f07168 | 984 | __be32 *p1, *tmp; |
1da177e4 LT |
985 | int len1, len2; |
986 | ||
987 | /* grab next page for temporary storage of entry */ | |
afc59400 | 988 | p1 = tmp = page_address(*(page+1)); |
1da177e4 LT |
989 | |
990 | p1 = encode_entry_baggage(cd, p1, name, namlen, ino); | |
991 | ||
8177e6d6 | 992 | if (plus) |
43b0e7ea | 993 | p1 = encode_entryplus_baggage(cd, p1, name, namlen, ino); |
1da177e4 LT |
994 | |
995 | /* determine entry word length and lengths to go in pages */ | |
996 | num_entry_words = p1 - tmp; | |
997 | len1 = curr_page_addr + PAGE_SIZE - (caddr_t)cd->buffer; | |
998 | if ((num_entry_words << 2) < len1) { | |
999 | /* the actual number of words in the entry is less | |
1000 | * than elen and can still fit in the current page | |
1001 | */ | |
1002 | memmove(p, tmp, num_entry_words << 2); | |
1003 | p += num_entry_words; | |
1004 | ||
1005 | /* update offset */ | |
1006 | cd->offset = cd->buffer + (cd->offset - tmp); | |
1007 | } else { | |
1008 | unsigned int offset_r = (cd->offset - tmp) << 2; | |
1009 | ||
1010 | /* update pointer to offset location. | |
1011 | * This is a 64bit quantity, so we need to | |
1012 | * deal with 3 cases: | |
1013 | * - entirely in first page | |
1014 | * - entirely in second page | |
1015 | * - 4 bytes in each page | |
1016 | */ | |
1017 | if (offset_r + 8 <= len1) { | |
1018 | cd->offset = p + (cd->offset - tmp); | |
1019 | } else if (offset_r >= len1) { | |
1020 | cd->offset -= len1 >> 2; | |
1021 | } else { | |
1022 | /* sitting on the fence */ | |
1023 | BUG_ON(offset_r != len1 - 4); | |
1024 | cd->offset = p + (cd->offset - tmp); | |
1025 | cd->offset1 = tmp; | |
1026 | } | |
1027 | ||
1028 | len2 = (num_entry_words << 2) - len1; | |
1029 | ||
1030 | /* move from temp page to current and next pages */ | |
1031 | memmove(p, tmp, len1); | |
1032 | memmove(tmp, (caddr_t)tmp+len1, len2); | |
1033 | ||
1034 | p = tmp + (len2 >> 2); | |
1035 | } | |
1036 | } | |
1037 | else { | |
1038 | cd->common.err = nfserr_toosmall; | |
1039 | return -EINVAL; | |
1040 | } | |
1041 | ||
1042 | cd->buflen -= num_entry_words; | |
1043 | cd->buffer = p; | |
1044 | cd->common.err = nfs_ok; | |
1045 | return 0; | |
1046 | ||
1047 | } | |
1048 | ||
1049 | int | |
a0ad13ef N |
1050 | nfs3svc_encode_entry(void *cd, const char *name, |
1051 | int namlen, loff_t offset, u64 ino, unsigned int d_type) | |
1da177e4 LT |
1052 | { |
1053 | return encode_entry(cd, name, namlen, offset, ino, d_type, 0); | |
1054 | } | |
1055 | ||
1056 | int | |
a0ad13ef N |
1057 | nfs3svc_encode_entry_plus(void *cd, const char *name, |
1058 | int namlen, loff_t offset, u64 ino, | |
1059 | unsigned int d_type) | |
1da177e4 LT |
1060 | { |
1061 | return encode_entry(cd, name, namlen, offset, ino, d_type, 1); | |
1062 | } | |
1063 | ||
1064 | /* FSSTAT */ | |
1065 | int | |
63f8de37 | 1066 | nfs3svc_encode_fsstatres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 1067 | { |
63f8de37 | 1068 | struct nfsd3_fsstatres *resp = rqstp->rq_resp; |
1da177e4 LT |
1069 | struct kstatfs *s = &resp->stats; |
1070 | u64 bs = s->f_bsize; | |
1071 | ||
cc028a10 | 1072 | *p++ = resp->status; |
1da177e4 LT |
1073 | *p++ = xdr_zero; /* no post_op_attr */ |
1074 | ||
1075 | if (resp->status == 0) { | |
1076 | p = xdr_encode_hyper(p, bs * s->f_blocks); /* total bytes */ | |
1077 | p = xdr_encode_hyper(p, bs * s->f_bfree); /* free bytes */ | |
1078 | p = xdr_encode_hyper(p, bs * s->f_bavail); /* user available bytes */ | |
1079 | p = xdr_encode_hyper(p, s->f_files); /* total inodes */ | |
1080 | p = xdr_encode_hyper(p, s->f_ffree); /* free inodes */ | |
1081 | p = xdr_encode_hyper(p, s->f_ffree); /* user available inodes */ | |
1082 | *p++ = htonl(resp->invarsec); /* mean unchanged time */ | |
1083 | } | |
1084 | return xdr_ressize_check(rqstp, p); | |
1085 | } | |
1086 | ||
1087 | /* FSINFO */ | |
1088 | int | |
63f8de37 | 1089 | nfs3svc_encode_fsinfores(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 1090 | { |
63f8de37 CH |
1091 | struct nfsd3_fsinfores *resp = rqstp->rq_resp; |
1092 | ||
cc028a10 | 1093 | *p++ = resp->status; |
1da177e4 LT |
1094 | *p++ = xdr_zero; /* no post_op_attr */ |
1095 | ||
1096 | if (resp->status == 0) { | |
1097 | *p++ = htonl(resp->f_rtmax); | |
1098 | *p++ = htonl(resp->f_rtpref); | |
1099 | *p++ = htonl(resp->f_rtmult); | |
1100 | *p++ = htonl(resp->f_wtmax); | |
1101 | *p++ = htonl(resp->f_wtpref); | |
1102 | *p++ = htonl(resp->f_wtmult); | |
1103 | *p++ = htonl(resp->f_dtpref); | |
1104 | p = xdr_encode_hyper(p, resp->f_maxfilesize); | |
1105 | *p++ = xdr_one; | |
1106 | *p++ = xdr_zero; | |
1107 | *p++ = htonl(resp->f_properties); | |
1108 | } | |
1109 | ||
1110 | return xdr_ressize_check(rqstp, p); | |
1111 | } | |
1112 | ||
1113 | /* PATHCONF */ | |
1114 | int | |
63f8de37 | 1115 | nfs3svc_encode_pathconfres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 1116 | { |
63f8de37 CH |
1117 | struct nfsd3_pathconfres *resp = rqstp->rq_resp; |
1118 | ||
1905cac9 | 1119 | *p++ = resp->status; |
1da177e4 LT |
1120 | *p++ = xdr_zero; /* no post_op_attr */ |
1121 | ||
1122 | if (resp->status == 0) { | |
1123 | *p++ = htonl(resp->p_link_max); | |
1124 | *p++ = htonl(resp->p_name_max); | |
1125 | *p++ = htonl(resp->p_no_trunc); | |
1126 | *p++ = htonl(resp->p_chown_restricted); | |
1127 | *p++ = htonl(resp->p_case_insensitive); | |
1128 | *p++ = htonl(resp->p_case_preserving); | |
1129 | } | |
1130 | ||
1131 | return xdr_ressize_check(rqstp, p); | |
1132 | } | |
1133 | ||
1134 | /* COMMIT */ | |
1135 | int | |
63f8de37 | 1136 | nfs3svc_encode_commitres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 1137 | { |
63f8de37 | 1138 | struct nfsd3_commitres *resp = rqstp->rq_resp; |
b9c0ef85 | 1139 | |
cc028a10 | 1140 | *p++ = resp->status; |
1da177e4 LT |
1141 | p = encode_wcc_data(rqstp, p, &resp->fh); |
1142 | /* Write verifier */ | |
1143 | if (resp->status == 0) { | |
524ff1af TM |
1144 | *p++ = resp->verf[0]; |
1145 | *p++ = resp->verf[1]; | |
1da177e4 LT |
1146 | } |
1147 | return xdr_ressize_check(rqstp, p); | |
1148 | } | |
1149 | ||
1150 | /* | |
1151 | * XDR release functions | |
1152 | */ | |
8537488b CH |
1153 | void |
1154 | nfs3svc_release_fhandle(struct svc_rqst *rqstp) | |
1da177e4 | 1155 | { |
8537488b CH |
1156 | struct nfsd3_attrstat *resp = rqstp->rq_resp; |
1157 | ||
1da177e4 | 1158 | fh_put(&resp->fh); |
1da177e4 LT |
1159 | } |
1160 | ||
8537488b CH |
1161 | void |
1162 | nfs3svc_release_fhandle2(struct svc_rqst *rqstp) | |
1da177e4 | 1163 | { |
8537488b CH |
1164 | struct nfsd3_fhandle_pair *resp = rqstp->rq_resp; |
1165 | ||
1da177e4 LT |
1166 | fh_put(&resp->fh1); |
1167 | fh_put(&resp->fh2); | |
1da177e4 | 1168 | } |