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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/fs/nfs/nfs3xdr.c | |
3 | * | |
4 | * XDR functions to encode/decode NFSv3 RPC arguments and results. | |
5 | * | |
6 | * Copyright (C) 1996, 1997 Olaf Kirch | |
7 | */ | |
8 | ||
9 | #include <linux/param.h> | |
10 | #include <linux/time.h> | |
11 | #include <linux/mm.h> | |
1da177e4 LT |
12 | #include <linux/errno.h> |
13 | #include <linux/string.h> | |
14 | #include <linux/in.h> | |
15 | #include <linux/pagemap.h> | |
16 | #include <linux/proc_fs.h> | |
17 | #include <linux/kdev_t.h> | |
18 | #include <linux/sunrpc/clnt.h> | |
19 | #include <linux/nfs.h> | |
20 | #include <linux/nfs3.h> | |
21 | #include <linux/nfs_fs.h> | |
b7fa0554 | 22 | #include <linux/nfsacl.h> |
f7b422b1 | 23 | #include "internal.h" |
1da177e4 LT |
24 | |
25 | #define NFSDBG_FACILITY NFSDBG_XDR | |
26 | ||
27 | /* Mapping from NFS error code to "errno" error code. */ | |
28 | #define errno_NFSERR_IO EIO | |
29 | ||
1da177e4 LT |
30 | /* |
31 | * Declare the space requirements for NFS arguments and replies as | |
32 | * number of 32bit-words | |
33 | */ | |
34 | #define NFS3_fhandle_sz (1+16) | |
35 | #define NFS3_fh_sz (NFS3_fhandle_sz) /* shorthand */ | |
36 | #define NFS3_sattr_sz (15) | |
37 | #define NFS3_filename_sz (1+(NFS3_MAXNAMLEN>>2)) | |
38 | #define NFS3_path_sz (1+(NFS3_MAXPATHLEN>>2)) | |
39 | #define NFS3_fattr_sz (21) | |
d9c407b1 | 40 | #define NFS3_cookieverf_sz (NFS3_COOKIEVERFSIZE>>2) |
1da177e4 LT |
41 | #define NFS3_wcc_attr_sz (6) |
42 | #define NFS3_pre_op_attr_sz (1+NFS3_wcc_attr_sz) | |
43 | #define NFS3_post_op_attr_sz (1+NFS3_fattr_sz) | |
44 | #define NFS3_wcc_data_sz (NFS3_pre_op_attr_sz+NFS3_post_op_attr_sz) | |
45 | #define NFS3_fsstat_sz | |
46 | #define NFS3_fsinfo_sz | |
47 | #define NFS3_pathconf_sz | |
48 | #define NFS3_entry_sz (NFS3_filename_sz+3) | |
49 | ||
50 | #define NFS3_sattrargs_sz (NFS3_fh_sz+NFS3_sattr_sz+3) | |
51 | #define NFS3_diropargs_sz (NFS3_fh_sz+NFS3_filename_sz) | |
4fdc17b2 | 52 | #define NFS3_removeargs_sz (NFS3_fh_sz+NFS3_filename_sz) |
1da177e4 LT |
53 | #define NFS3_accessargs_sz (NFS3_fh_sz+1) |
54 | #define NFS3_readlinkargs_sz (NFS3_fh_sz) | |
55 | #define NFS3_readargs_sz (NFS3_fh_sz+3) | |
56 | #define NFS3_writeargs_sz (NFS3_fh_sz+5) | |
57 | #define NFS3_createargs_sz (NFS3_diropargs_sz+NFS3_sattr_sz) | |
58 | #define NFS3_mkdirargs_sz (NFS3_diropargs_sz+NFS3_sattr_sz) | |
94a6d753 | 59 | #define NFS3_symlinkargs_sz (NFS3_diropargs_sz+1+NFS3_sattr_sz) |
1da177e4 LT |
60 | #define NFS3_mknodargs_sz (NFS3_diropargs_sz+2+NFS3_sattr_sz) |
61 | #define NFS3_renameargs_sz (NFS3_diropargs_sz+NFS3_diropargs_sz) | |
62 | #define NFS3_linkargs_sz (NFS3_fh_sz+NFS3_diropargs_sz) | |
d9c407b1 CL |
63 | #define NFS3_readdirargs_sz (NFS3_fh_sz+NFS3_cookieverf_sz+3) |
64 | #define NFS3_readdirplusargs_sz (NFS3_fh_sz+NFS3_cookieverf_sz+4) | |
1da177e4 LT |
65 | #define NFS3_commitargs_sz (NFS3_fh_sz+3) |
66 | ||
67 | #define NFS3_attrstat_sz (1+NFS3_fattr_sz) | |
68 | #define NFS3_wccstat_sz (1+NFS3_wcc_data_sz) | |
4fdc17b2 | 69 | #define NFS3_removeres_sz (NFS3_wccstat_sz) |
1da177e4 LT |
70 | #define NFS3_lookupres_sz (1+NFS3_fh_sz+(2 * NFS3_post_op_attr_sz)) |
71 | #define NFS3_accessres_sz (1+NFS3_post_op_attr_sz+1) | |
72 | #define NFS3_readlinkres_sz (1+NFS3_post_op_attr_sz+1) | |
73 | #define NFS3_readres_sz (1+NFS3_post_op_attr_sz+3) | |
74 | #define NFS3_writeres_sz (1+NFS3_wcc_data_sz+4) | |
75 | #define NFS3_createres_sz (1+NFS3_fh_sz+NFS3_post_op_attr_sz+NFS3_wcc_data_sz) | |
76 | #define NFS3_renameres_sz (1+(2 * NFS3_wcc_data_sz)) | |
77 | #define NFS3_linkres_sz (1+NFS3_post_op_attr_sz+NFS3_wcc_data_sz) | |
78 | #define NFS3_readdirres_sz (1+NFS3_post_op_attr_sz+2) | |
79 | #define NFS3_fsstatres_sz (1+NFS3_post_op_attr_sz+13) | |
80 | #define NFS3_fsinfores_sz (1+NFS3_post_op_attr_sz+12) | |
81 | #define NFS3_pathconfres_sz (1+NFS3_post_op_attr_sz+6) | |
82 | #define NFS3_commitres_sz (1+NFS3_wcc_data_sz+2) | |
83 | ||
b7fa0554 | 84 | #define ACL3_getaclargs_sz (NFS3_fh_sz+1) |
ae46141f TM |
85 | #define ACL3_setaclargs_sz (NFS3_fh_sz+1+ \ |
86 | XDR_QUADLEN(NFS_ACL_INLINE_BUFSIZE)) | |
87 | #define ACL3_getaclres_sz (1+NFS3_post_op_attr_sz+1+ \ | |
88 | XDR_QUADLEN(NFS_ACL_INLINE_BUFSIZE)) | |
b7fa0554 AG |
89 | #define ACL3_setaclres_sz (1+NFS3_post_op_attr_sz) |
90 | ||
1da177e4 LT |
91 | /* |
92 | * Map file type to S_IFMT bits | |
93 | */ | |
bca79478 TM |
94 | static const umode_t nfs_type2fmt[] = { |
95 | [NF3BAD] = 0, | |
96 | [NF3REG] = S_IFREG, | |
97 | [NF3DIR] = S_IFDIR, | |
98 | [NF3BLK] = S_IFBLK, | |
99 | [NF3CHR] = S_IFCHR, | |
100 | [NF3LNK] = S_IFLNK, | |
101 | [NF3SOCK] = S_IFSOCK, | |
102 | [NF3FIFO] = S_IFIFO, | |
1da177e4 LT |
103 | }; |
104 | ||
babddc72 BS |
105 | static void print_overflow_msg(const char *func, const struct xdr_stream *xdr) |
106 | { | |
107 | dprintk("nfs: %s: prematurely hit end of receive buffer. " | |
108 | "Remaining buffer length is %tu words.\n", | |
109 | func, xdr->end - xdr->p); | |
110 | } | |
111 | ||
d9c407b1 CL |
112 | /* |
113 | * While encoding arguments, set up the reply buffer in advance to | |
114 | * receive reply data directly into the page cache. | |
115 | */ | |
116 | static void prepare_reply_buffer(struct rpc_rqst *req, struct page **pages, | |
117 | unsigned int base, unsigned int len, | |
118 | unsigned int bufsize) | |
119 | { | |
120 | struct rpc_auth *auth = req->rq_cred->cr_auth; | |
121 | unsigned int replen; | |
122 | ||
123 | replen = RPC_REPHDRSIZE + auth->au_rslack + bufsize; | |
124 | xdr_inline_pages(&req->rq_rcv_buf, replen << 2, pages, base, len); | |
125 | } | |
126 | ||
127 | ||
1da177e4 LT |
128 | /* |
129 | * Common NFS XDR functions as inlines | |
130 | */ | |
d61005a6 | 131 | static inline __be32 * |
4fdc17b2 | 132 | xdr_encode_fhandle(__be32 *p, const struct nfs_fh *fh) |
1da177e4 LT |
133 | { |
134 | return xdr_encode_array(p, fh->data, fh->size); | |
135 | } | |
136 | ||
d61005a6 AV |
137 | static inline __be32 * |
138 | xdr_decode_fhandle(__be32 *p, struct nfs_fh *fh) | |
1da177e4 LT |
139 | { |
140 | if ((fh->size = ntohl(*p++)) <= NFS3_FHSIZE) { | |
141 | memcpy(fh->data, p, fh->size); | |
142 | return p + XDR_QUADLEN(fh->size); | |
143 | } | |
144 | return NULL; | |
145 | } | |
146 | ||
babddc72 BS |
147 | static inline __be32 * |
148 | xdr_decode_fhandle_stream(struct xdr_stream *xdr, struct nfs_fh *fh) | |
149 | { | |
150 | __be32 *p; | |
151 | p = xdr_inline_decode(xdr, 4); | |
152 | if (unlikely(!p)) | |
153 | goto out_overflow; | |
154 | fh->size = ntohl(*p++); | |
155 | ||
156 | if (fh->size <= NFS3_FHSIZE) { | |
157 | p = xdr_inline_decode(xdr, fh->size); | |
158 | if (unlikely(!p)) | |
159 | goto out_overflow; | |
160 | memcpy(fh->data, p, fh->size); | |
161 | return p + XDR_QUADLEN(fh->size); | |
162 | } | |
163 | return NULL; | |
164 | ||
165 | out_overflow: | |
166 | print_overflow_msg(__func__, xdr); | |
167 | return ERR_PTR(-EIO); | |
168 | } | |
169 | ||
1da177e4 LT |
170 | /* |
171 | * Encode/decode time. | |
172 | */ | |
d61005a6 | 173 | static inline __be32 * |
d9c407b1 | 174 | xdr_encode_time3(__be32 *p, const struct timespec *timep) |
1da177e4 LT |
175 | { |
176 | *p++ = htonl(timep->tv_sec); | |
177 | *p++ = htonl(timep->tv_nsec); | |
178 | return p; | |
179 | } | |
180 | ||
d61005a6 AV |
181 | static inline __be32 * |
182 | xdr_decode_time3(__be32 *p, struct timespec *timep) | |
1da177e4 LT |
183 | { |
184 | timep->tv_sec = ntohl(*p++); | |
185 | timep->tv_nsec = ntohl(*p++); | |
186 | return p; | |
187 | } | |
188 | ||
d61005a6 AV |
189 | static __be32 * |
190 | xdr_decode_fattr(__be32 *p, struct nfs_fattr *fattr) | |
1da177e4 LT |
191 | { |
192 | unsigned int type, major, minor; | |
bca79478 | 193 | umode_t fmode; |
1da177e4 LT |
194 | |
195 | type = ntohl(*p++); | |
bca79478 TM |
196 | if (type > NF3FIFO) |
197 | type = NF3NON; | |
198 | fmode = nfs_type2fmt[type]; | |
1da177e4 LT |
199 | fattr->mode = (ntohl(*p++) & ~S_IFMT) | fmode; |
200 | fattr->nlink = ntohl(*p++); | |
201 | fattr->uid = ntohl(*p++); | |
202 | fattr->gid = ntohl(*p++); | |
203 | p = xdr_decode_hyper(p, &fattr->size); | |
204 | p = xdr_decode_hyper(p, &fattr->du.nfs3.used); | |
205 | ||
206 | /* Turn remote device info into Linux-specific dev_t */ | |
207 | major = ntohl(*p++); | |
208 | minor = ntohl(*p++); | |
209 | fattr->rdev = MKDEV(major, minor); | |
210 | if (MAJOR(fattr->rdev) != major || MINOR(fattr->rdev) != minor) | |
211 | fattr->rdev = 0; | |
212 | ||
8b4bdcf8 TM |
213 | p = xdr_decode_hyper(p, &fattr->fsid.major); |
214 | fattr->fsid.minor = 0; | |
1da177e4 LT |
215 | p = xdr_decode_hyper(p, &fattr->fileid); |
216 | p = xdr_decode_time3(p, &fattr->atime); | |
217 | p = xdr_decode_time3(p, &fattr->mtime); | |
218 | p = xdr_decode_time3(p, &fattr->ctime); | |
219 | ||
220 | /* Update the mode bits */ | |
9e6e70f8 | 221 | fattr->valid |= NFS_ATTR_FATTR_V3; |
1da177e4 LT |
222 | return p; |
223 | } | |
224 | ||
d61005a6 | 225 | static inline __be32 * |
d9c407b1 | 226 | xdr_encode_sattr(__be32 *p, const struct iattr *attr) |
1da177e4 LT |
227 | { |
228 | if (attr->ia_valid & ATTR_MODE) { | |
229 | *p++ = xdr_one; | |
cf3fff54 | 230 | *p++ = htonl(attr->ia_mode & S_IALLUGO); |
1da177e4 LT |
231 | } else { |
232 | *p++ = xdr_zero; | |
233 | } | |
234 | if (attr->ia_valid & ATTR_UID) { | |
235 | *p++ = xdr_one; | |
236 | *p++ = htonl(attr->ia_uid); | |
237 | } else { | |
238 | *p++ = xdr_zero; | |
239 | } | |
240 | if (attr->ia_valid & ATTR_GID) { | |
241 | *p++ = xdr_one; | |
242 | *p++ = htonl(attr->ia_gid); | |
243 | } else { | |
244 | *p++ = xdr_zero; | |
245 | } | |
246 | if (attr->ia_valid & ATTR_SIZE) { | |
247 | *p++ = xdr_one; | |
248 | p = xdr_encode_hyper(p, (__u64) attr->ia_size); | |
249 | } else { | |
250 | *p++ = xdr_zero; | |
251 | } | |
252 | if (attr->ia_valid & ATTR_ATIME_SET) { | |
253 | *p++ = xdr_two; | |
254 | p = xdr_encode_time3(p, &attr->ia_atime); | |
255 | } else if (attr->ia_valid & ATTR_ATIME) { | |
256 | *p++ = xdr_one; | |
257 | } else { | |
258 | *p++ = xdr_zero; | |
259 | } | |
260 | if (attr->ia_valid & ATTR_MTIME_SET) { | |
261 | *p++ = xdr_two; | |
262 | p = xdr_encode_time3(p, &attr->ia_mtime); | |
263 | } else if (attr->ia_valid & ATTR_MTIME) { | |
264 | *p++ = xdr_one; | |
265 | } else { | |
266 | *p++ = xdr_zero; | |
267 | } | |
268 | return p; | |
269 | } | |
270 | ||
d61005a6 AV |
271 | static inline __be32 * |
272 | xdr_decode_wcc_attr(__be32 *p, struct nfs_fattr *fattr) | |
1da177e4 LT |
273 | { |
274 | p = xdr_decode_hyper(p, &fattr->pre_size); | |
275 | p = xdr_decode_time3(p, &fattr->pre_mtime); | |
276 | p = xdr_decode_time3(p, &fattr->pre_ctime); | |
9e6e70f8 TM |
277 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE |
278 | | NFS_ATTR_FATTR_PREMTIME | |
279 | | NFS_ATTR_FATTR_PRECTIME; | |
1da177e4 LT |
280 | return p; |
281 | } | |
282 | ||
d61005a6 AV |
283 | static inline __be32 * |
284 | xdr_decode_post_op_attr(__be32 *p, struct nfs_fattr *fattr) | |
1da177e4 LT |
285 | { |
286 | if (*p++) | |
287 | p = xdr_decode_fattr(p, fattr); | |
288 | return p; | |
289 | } | |
290 | ||
babddc72 BS |
291 | static inline __be32 * |
292 | xdr_decode_post_op_attr_stream(struct xdr_stream *xdr, struct nfs_fattr *fattr) | |
293 | { | |
294 | __be32 *p; | |
295 | ||
296 | p = xdr_inline_decode(xdr, 4); | |
297 | if (unlikely(!p)) | |
298 | goto out_overflow; | |
299 | if (ntohl(*p++)) { | |
300 | p = xdr_inline_decode(xdr, 84); | |
301 | if (unlikely(!p)) | |
302 | goto out_overflow; | |
303 | p = xdr_decode_fattr(p, fattr); | |
304 | } | |
305 | return p; | |
306 | out_overflow: | |
307 | print_overflow_msg(__func__, xdr); | |
308 | return ERR_PTR(-EIO); | |
309 | } | |
310 | ||
d61005a6 AV |
311 | static inline __be32 * |
312 | xdr_decode_pre_op_attr(__be32 *p, struct nfs_fattr *fattr) | |
1da177e4 LT |
313 | { |
314 | if (*p++) | |
315 | return xdr_decode_wcc_attr(p, fattr); | |
316 | return p; | |
317 | } | |
318 | ||
319 | ||
d61005a6 AV |
320 | static inline __be32 * |
321 | xdr_decode_wcc_data(__be32 *p, struct nfs_fattr *fattr) | |
1da177e4 LT |
322 | { |
323 | p = xdr_decode_pre_op_attr(p, fattr); | |
324 | return xdr_decode_post_op_attr(p, fattr); | |
325 | } | |
326 | ||
d9c407b1 CL |
327 | |
328 | /* | |
329 | * Encode/decode NFSv3 basic data types | |
330 | * | |
331 | * Basic NFSv3 data types are defined in section 2.5 of RFC 1813: | |
332 | * "NFS Version 3 Protocol Specification". | |
333 | * | |
334 | * Not all basic data types have their own encoding and decoding | |
335 | * functions. For run-time efficiency, some data types are encoded | |
336 | * or decoded inline. | |
337 | */ | |
338 | ||
339 | static void encode_uint32(struct xdr_stream *xdr, u32 value) | |
340 | { | |
341 | __be32 *p = xdr_reserve_space(xdr, 4); | |
342 | *p = cpu_to_be32(value); | |
343 | } | |
344 | ||
345 | /* | |
346 | * filename3 | |
347 | * | |
348 | * typedef string filename3<>; | |
349 | */ | |
350 | static void encode_filename3(struct xdr_stream *xdr, | |
351 | const char *name, u32 length) | |
352 | { | |
353 | __be32 *p; | |
354 | ||
355 | BUG_ON(length > NFS3_MAXNAMLEN); | |
356 | p = xdr_reserve_space(xdr, 4 + length); | |
357 | xdr_encode_opaque(p, name, length); | |
358 | } | |
359 | ||
360 | /* | |
361 | * nfspath3 | |
362 | * | |
363 | * typedef string nfspath3<>; | |
364 | */ | |
365 | static void encode_nfspath3(struct xdr_stream *xdr, struct page **pages, | |
366 | const u32 length) | |
367 | { | |
368 | BUG_ON(length > NFS3_MAXPATHLEN); | |
369 | encode_uint32(xdr, length); | |
370 | xdr_write_pages(xdr, pages, 0, length); | |
371 | } | |
372 | ||
373 | /* | |
374 | * cookie3 | |
375 | * | |
376 | * typedef uint64 cookie3 | |
377 | */ | |
378 | static __be32 *xdr_encode_cookie3(__be32 *p, u64 cookie) | |
379 | { | |
380 | return xdr_encode_hyper(p, cookie); | |
381 | } | |
382 | ||
383 | /* | |
384 | * cookieverf3 | |
385 | * | |
386 | * typedef opaque cookieverf3[NFS3_COOKIEVERFSIZE]; | |
387 | */ | |
388 | static __be32 *xdr_encode_cookieverf3(__be32 *p, const __be32 *verifier) | |
389 | { | |
390 | memcpy(p, verifier, NFS3_COOKIEVERFSIZE); | |
391 | return p + XDR_QUADLEN(NFS3_COOKIEVERFSIZE); | |
392 | } | |
393 | ||
394 | /* | |
395 | * createverf3 | |
396 | * | |
397 | * typedef opaque createverf3[NFS3_CREATEVERFSIZE]; | |
398 | */ | |
399 | static void encode_createverf3(struct xdr_stream *xdr, const __be32 *verifier) | |
400 | { | |
401 | __be32 *p; | |
402 | ||
403 | p = xdr_reserve_space(xdr, NFS3_CREATEVERFSIZE); | |
404 | memcpy(p, verifier, NFS3_CREATEVERFSIZE); | |
405 | } | |
406 | ||
407 | /* | |
408 | * ftype3 | |
409 | * | |
410 | * enum ftype3 { | |
411 | * NF3REG = 1, | |
412 | * NF3DIR = 2, | |
413 | * NF3BLK = 3, | |
414 | * NF3CHR = 4, | |
415 | * NF3LNK = 5, | |
416 | * NF3SOCK = 6, | |
417 | * NF3FIFO = 7 | |
418 | * }; | |
419 | */ | |
420 | static void encode_ftype3(struct xdr_stream *xdr, const u32 type) | |
421 | { | |
422 | BUG_ON(type > NF3FIFO); | |
423 | encode_uint32(xdr, type); | |
424 | } | |
425 | ||
426 | /* | |
427 | * specdata3 | |
428 | * | |
429 | * struct specdata3 { | |
430 | * uint32 specdata1; | |
431 | * uint32 specdata2; | |
432 | * }; | |
433 | */ | |
434 | static void encode_specdata3(struct xdr_stream *xdr, const dev_t rdev) | |
435 | { | |
436 | __be32 *p; | |
437 | ||
438 | p = xdr_reserve_space(xdr, 8); | |
439 | *p++ = cpu_to_be32(MAJOR(rdev)); | |
440 | *p = cpu_to_be32(MINOR(rdev)); | |
441 | } | |
442 | ||
443 | /* | |
444 | * nfs_fh3 | |
445 | * | |
446 | * struct nfs_fh3 { | |
447 | * opaque data<NFS3_FHSIZE>; | |
448 | * }; | |
449 | */ | |
450 | static void encode_nfs_fh3(struct xdr_stream *xdr, const struct nfs_fh *fh) | |
451 | { | |
452 | __be32 *p; | |
453 | ||
454 | BUG_ON(fh->size > NFS3_FHSIZE); | |
455 | p = xdr_reserve_space(xdr, 4 + fh->size); | |
456 | xdr_encode_opaque(p, fh->data, fh->size); | |
457 | } | |
458 | ||
459 | /* | |
460 | * sattr3 | |
461 | * | |
462 | * enum time_how { | |
463 | * DONT_CHANGE = 0, | |
464 | * SET_TO_SERVER_TIME = 1, | |
465 | * SET_TO_CLIENT_TIME = 2 | |
466 | * }; | |
467 | * | |
468 | * union set_mode3 switch (bool set_it) { | |
469 | * case TRUE: | |
470 | * mode3 mode; | |
471 | * default: | |
472 | * void; | |
473 | * }; | |
474 | * | |
475 | * union set_uid3 switch (bool set_it) { | |
476 | * case TRUE: | |
477 | * uid3 uid; | |
478 | * default: | |
479 | * void; | |
480 | * }; | |
481 | * | |
482 | * union set_gid3 switch (bool set_it) { | |
483 | * case TRUE: | |
484 | * gid3 gid; | |
485 | * default: | |
486 | * void; | |
487 | * }; | |
488 | * | |
489 | * union set_size3 switch (bool set_it) { | |
490 | * case TRUE: | |
491 | * size3 size; | |
492 | * default: | |
493 | * void; | |
494 | * }; | |
495 | * | |
496 | * union set_atime switch (time_how set_it) { | |
497 | * case SET_TO_CLIENT_TIME: | |
498 | * nfstime3 atime; | |
499 | * default: | |
500 | * void; | |
501 | * }; | |
502 | * | |
503 | * union set_mtime switch (time_how set_it) { | |
504 | * case SET_TO_CLIENT_TIME: | |
505 | * nfstime3 mtime; | |
506 | * default: | |
507 | * void; | |
508 | * }; | |
509 | * | |
510 | * struct sattr3 { | |
511 | * set_mode3 mode; | |
512 | * set_uid3 uid; | |
513 | * set_gid3 gid; | |
514 | * set_size3 size; | |
515 | * set_atime atime; | |
516 | * set_mtime mtime; | |
517 | * }; | |
518 | */ | |
519 | static void encode_sattr3(struct xdr_stream *xdr, const struct iattr *attr) | |
520 | { | |
521 | u32 nbytes; | |
522 | __be32 *p; | |
523 | ||
524 | /* | |
525 | * In order to make only a single xdr_reserve_space() call, | |
526 | * pre-compute the total number of bytes to be reserved. | |
527 | * Six boolean values, one for each set_foo field, are always | |
528 | * present in the encoded result, so start there. | |
529 | */ | |
530 | nbytes = 6 * 4; | |
531 | if (attr->ia_valid & ATTR_MODE) | |
532 | nbytes += 4; | |
533 | if (attr->ia_valid & ATTR_UID) | |
534 | nbytes += 4; | |
535 | if (attr->ia_valid & ATTR_GID) | |
536 | nbytes += 4; | |
537 | if (attr->ia_valid & ATTR_SIZE) | |
538 | nbytes += 8; | |
539 | if (attr->ia_valid & ATTR_ATIME_SET) | |
540 | nbytes += 8; | |
541 | if (attr->ia_valid & ATTR_MTIME_SET) | |
542 | nbytes += 8; | |
543 | p = xdr_reserve_space(xdr, nbytes); | |
544 | ||
545 | xdr_encode_sattr(p, attr); | |
546 | } | |
547 | ||
548 | /* | |
549 | * diropargs3 | |
550 | * | |
551 | * struct diropargs3 { | |
552 | * nfs_fh3 dir; | |
553 | * filename3 name; | |
554 | * }; | |
555 | */ | |
556 | static void encode_diropargs3(struct xdr_stream *xdr, const struct nfs_fh *fh, | |
557 | const char *name, u32 length) | |
558 | { | |
559 | encode_nfs_fh3(xdr, fh); | |
560 | encode_filename3(xdr, name, length); | |
561 | } | |
562 | ||
563 | ||
1da177e4 LT |
564 | /* |
565 | * NFS encode functions | |
566 | */ | |
567 | ||
568 | /* | |
569 | * Encode file handle argument | |
570 | */ | |
571 | static int | |
d61005a6 | 572 | nfs3_xdr_fhandle(struct rpc_rqst *req, __be32 *p, struct nfs_fh *fh) |
1da177e4 LT |
573 | { |
574 | p = xdr_encode_fhandle(p, fh); | |
575 | req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); | |
576 | return 0; | |
577 | } | |
578 | ||
d9c407b1 CL |
579 | /* |
580 | * 3.3.1 GETATTR3args | |
581 | * | |
582 | * struct GETATTR3args { | |
583 | * nfs_fh3 object; | |
584 | * }; | |
585 | */ | |
586 | static int nfs3_xdr_enc_getattr3args(struct rpc_rqst *req, __be32 *p, | |
587 | const struct nfs_fh *fh) | |
588 | { | |
589 | struct xdr_stream xdr; | |
590 | ||
591 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
592 | encode_nfs_fh3(&xdr, fh); | |
593 | return 0; | |
594 | } | |
595 | ||
1da177e4 LT |
596 | /* |
597 | * Encode SETATTR arguments | |
598 | */ | |
599 | static int | |
d61005a6 | 600 | nfs3_xdr_sattrargs(struct rpc_rqst *req, __be32 *p, struct nfs3_sattrargs *args) |
1da177e4 LT |
601 | { |
602 | p = xdr_encode_fhandle(p, args->fh); | |
603 | p = xdr_encode_sattr(p, args->sattr); | |
604 | *p++ = htonl(args->guard); | |
605 | if (args->guard) | |
606 | p = xdr_encode_time3(p, &args->guardtime); | |
607 | req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); | |
608 | return 0; | |
609 | } | |
610 | ||
d9c407b1 CL |
611 | /* |
612 | * 3.3.2 SETATTR3args | |
613 | * | |
614 | * union sattrguard3 switch (bool check) { | |
615 | * case TRUE: | |
616 | * nfstime3 obj_ctime; | |
617 | * case FALSE: | |
618 | * void; | |
619 | * }; | |
620 | * | |
621 | * struct SETATTR3args { | |
622 | * nfs_fh3 object; | |
623 | * sattr3 new_attributes; | |
624 | * sattrguard3 guard; | |
625 | * }; | |
626 | */ | |
627 | static void encode_sattrguard3(struct xdr_stream *xdr, | |
628 | const struct nfs3_sattrargs *args) | |
629 | { | |
630 | __be32 *p; | |
631 | ||
632 | if (args->guard) { | |
633 | p = xdr_reserve_space(xdr, 4 + 8); | |
634 | *p++ = xdr_one; | |
635 | xdr_encode_time3(p, &args->guardtime); | |
636 | } else { | |
637 | p = xdr_reserve_space(xdr, 4); | |
638 | *p = xdr_zero; | |
639 | } | |
640 | } | |
641 | ||
642 | static int nfs3_xdr_enc_setattr3args(struct rpc_rqst *req, __be32 *p, | |
643 | const struct nfs3_sattrargs *args) | |
644 | { | |
645 | struct xdr_stream xdr; | |
646 | ||
647 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
648 | encode_nfs_fh3(&xdr, args->fh); | |
649 | encode_sattr3(&xdr, args->sattr); | |
650 | encode_sattrguard3(&xdr, args); | |
651 | return 0; | |
652 | } | |
653 | ||
1da177e4 LT |
654 | /* |
655 | * Encode directory ops argument | |
656 | */ | |
657 | static int | |
d61005a6 | 658 | nfs3_xdr_diropargs(struct rpc_rqst *req, __be32 *p, struct nfs3_diropargs *args) |
1da177e4 LT |
659 | { |
660 | p = xdr_encode_fhandle(p, args->fh); | |
661 | p = xdr_encode_array(p, args->name, args->len); | |
662 | req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); | |
663 | return 0; | |
664 | } | |
665 | ||
d9c407b1 CL |
666 | /* |
667 | * 3.3.3 LOOKUP3args | |
668 | * | |
669 | * struct LOOKUP3args { | |
670 | * diropargs3 what; | |
671 | * }; | |
672 | */ | |
673 | static int nfs3_xdr_enc_lookup3args(struct rpc_rqst *req, __be32 *p, | |
674 | const struct nfs3_diropargs *args) | |
675 | { | |
676 | struct xdr_stream xdr; | |
677 | ||
678 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
679 | encode_diropargs3(&xdr, args->fh, args->name, args->len); | |
680 | return 0; | |
681 | } | |
682 | ||
4fdc17b2 TM |
683 | /* |
684 | * Encode REMOVE argument | |
685 | */ | |
686 | static int | |
687 | nfs3_xdr_removeargs(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args) | |
688 | { | |
689 | p = xdr_encode_fhandle(p, args->fh); | |
690 | p = xdr_encode_array(p, args->name.name, args->name.len); | |
691 | req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); | |
692 | return 0; | |
693 | } | |
694 | ||
1da177e4 LT |
695 | /* |
696 | * Encode access() argument | |
697 | */ | |
698 | static int | |
d61005a6 | 699 | nfs3_xdr_accessargs(struct rpc_rqst *req, __be32 *p, struct nfs3_accessargs *args) |
1da177e4 LT |
700 | { |
701 | p = xdr_encode_fhandle(p, args->fh); | |
702 | *p++ = htonl(args->access); | |
703 | req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); | |
704 | return 0; | |
705 | } | |
706 | ||
d9c407b1 CL |
707 | /* |
708 | * 3.3.4 ACCESS3args | |
709 | * | |
710 | * struct ACCESS3args { | |
711 | * nfs_fh3 object; | |
712 | * uint32 access; | |
713 | * }; | |
714 | */ | |
715 | static void encode_access3args(struct xdr_stream *xdr, | |
716 | const struct nfs3_accessargs *args) | |
717 | { | |
718 | encode_nfs_fh3(xdr, args->fh); | |
719 | encode_uint32(xdr, args->access); | |
720 | } | |
721 | ||
722 | static int nfs3_xdr_enc_access3args(struct rpc_rqst *req, __be32 *p, | |
723 | const struct nfs3_accessargs *args) | |
724 | { | |
725 | struct xdr_stream xdr; | |
726 | ||
727 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
728 | encode_access3args(&xdr, args); | |
729 | return 0; | |
730 | } | |
731 | ||
732 | /* | |
733 | * 3.3.5 READLINK3args | |
734 | * | |
735 | * struct READLINK3args { | |
736 | * nfs_fh3 symlink; | |
737 | * }; | |
738 | */ | |
739 | static int nfs3_xdr_enc_readlink3args(struct rpc_rqst *req, __be32 *p, | |
740 | const struct nfs3_readlinkargs *args) | |
741 | { | |
742 | struct xdr_stream xdr; | |
743 | ||
744 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
745 | encode_nfs_fh3(&xdr, args->fh); | |
746 | prepare_reply_buffer(req, args->pages, args->pgbase, | |
747 | args->pglen, NFS3_readlinkres_sz); | |
748 | return 0; | |
749 | } | |
750 | ||
1da177e4 LT |
751 | /* |
752 | * Arguments to a READ call. Since we read data directly into the page | |
753 | * cache, we also set up the reply iovec here so that iov[1] points | |
754 | * exactly to the page we want to fetch. | |
755 | */ | |
756 | static int | |
d61005a6 | 757 | nfs3_xdr_readargs(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args) |
1da177e4 | 758 | { |
a17c2153 | 759 | struct rpc_auth *auth = req->rq_cred->cr_auth; |
1da177e4 LT |
760 | unsigned int replen; |
761 | u32 count = args->count; | |
762 | ||
763 | p = xdr_encode_fhandle(p, args->fh); | |
764 | p = xdr_encode_hyper(p, args->offset); | |
765 | *p++ = htonl(count); | |
766 | req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); | |
767 | ||
768 | /* Inline the page array */ | |
769 | replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS3_readres_sz) << 2; | |
770 | xdr_inline_pages(&req->rq_rcv_buf, replen, | |
771 | args->pages, args->pgbase, count); | |
4f22ccc3 | 772 | req->rq_rcv_buf.flags |= XDRBUF_READ; |
1da177e4 LT |
773 | return 0; |
774 | } | |
775 | ||
d9c407b1 CL |
776 | /* |
777 | * 3.3.6 READ3args | |
778 | * | |
779 | * struct READ3args { | |
780 | * nfs_fh3 file; | |
781 | * offset3 offset; | |
782 | * count3 count; | |
783 | * }; | |
784 | */ | |
785 | static void encode_read3args(struct xdr_stream *xdr, | |
786 | const struct nfs_readargs *args) | |
787 | { | |
788 | __be32 *p; | |
789 | ||
790 | encode_nfs_fh3(xdr, args->fh); | |
791 | ||
792 | p = xdr_reserve_space(xdr, 8 + 4); | |
793 | p = xdr_encode_hyper(p, args->offset); | |
794 | *p = cpu_to_be32(args->count); | |
795 | } | |
796 | ||
797 | static int nfs3_xdr_enc_read3args(struct rpc_rqst *req, __be32 *p, | |
798 | const struct nfs_readargs *args) | |
799 | { | |
800 | struct xdr_stream xdr; | |
801 | ||
802 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
803 | encode_read3args(&xdr, args); | |
804 | prepare_reply_buffer(req, args->pages, args->pgbase, | |
805 | args->count, NFS3_readres_sz); | |
806 | req->rq_rcv_buf.flags |= XDRBUF_READ; | |
807 | return 0; | |
808 | } | |
809 | ||
1da177e4 LT |
810 | /* |
811 | * Write arguments. Splice the buffer to be written into the iovec. | |
812 | */ | |
813 | static int | |
d61005a6 | 814 | nfs3_xdr_writeargs(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args) |
1da177e4 LT |
815 | { |
816 | struct xdr_buf *sndbuf = &req->rq_snd_buf; | |
817 | u32 count = args->count; | |
818 | ||
819 | p = xdr_encode_fhandle(p, args->fh); | |
820 | p = xdr_encode_hyper(p, args->offset); | |
821 | *p++ = htonl(count); | |
822 | *p++ = htonl(args->stable); | |
823 | *p++ = htonl(count); | |
824 | sndbuf->len = xdr_adjust_iovec(sndbuf->head, p); | |
825 | ||
826 | /* Copy the page array */ | |
827 | xdr_encode_pages(sndbuf, args->pages, args->pgbase, count); | |
4f22ccc3 | 828 | sndbuf->flags |= XDRBUF_WRITE; |
1da177e4 LT |
829 | return 0; |
830 | } | |
831 | ||
d9c407b1 CL |
832 | /* |
833 | * 3.3.7 WRITE3args | |
834 | * | |
835 | * enum stable_how { | |
836 | * UNSTABLE = 0, | |
837 | * DATA_SYNC = 1, | |
838 | * FILE_SYNC = 2 | |
839 | * }; | |
840 | * | |
841 | * struct WRITE3args { | |
842 | * nfs_fh3 file; | |
843 | * offset3 offset; | |
844 | * count3 count; | |
845 | * stable_how stable; | |
846 | * opaque data<>; | |
847 | * }; | |
848 | */ | |
849 | static void encode_write3args(struct xdr_stream *xdr, | |
850 | const struct nfs_writeargs *args) | |
851 | { | |
852 | __be32 *p; | |
853 | ||
854 | encode_nfs_fh3(xdr, args->fh); | |
855 | ||
856 | p = xdr_reserve_space(xdr, 8 + 4 + 4 + 4); | |
857 | p = xdr_encode_hyper(p, args->offset); | |
858 | *p++ = cpu_to_be32(args->count); | |
859 | ||
860 | BUG_ON(args->stable > NFS_FILE_SYNC); | |
861 | *p++ = cpu_to_be32(args->stable); | |
862 | ||
863 | *p = cpu_to_be32(args->count); | |
864 | xdr_write_pages(xdr, args->pages, args->pgbase, args->count); | |
865 | } | |
866 | ||
867 | static int nfs3_xdr_enc_write3args(struct rpc_rqst *req, __be32 *p, | |
868 | const struct nfs_writeargs *args) | |
869 | { | |
870 | struct xdr_stream xdr; | |
871 | ||
872 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
873 | encode_write3args(&xdr, args); | |
874 | xdr.buf->flags |= XDRBUF_WRITE; | |
875 | return 0; | |
876 | } | |
877 | ||
1da177e4 LT |
878 | /* |
879 | * Encode CREATE arguments | |
880 | */ | |
881 | static int | |
d61005a6 | 882 | nfs3_xdr_createargs(struct rpc_rqst *req, __be32 *p, struct nfs3_createargs *args) |
1da177e4 LT |
883 | { |
884 | p = xdr_encode_fhandle(p, args->fh); | |
885 | p = xdr_encode_array(p, args->name, args->len); | |
886 | ||
887 | *p++ = htonl(args->createmode); | |
888 | if (args->createmode == NFS3_CREATE_EXCLUSIVE) { | |
889 | *p++ = args->verifier[0]; | |
890 | *p++ = args->verifier[1]; | |
891 | } else | |
892 | p = xdr_encode_sattr(p, args->sattr); | |
893 | ||
894 | req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); | |
895 | return 0; | |
896 | } | |
897 | ||
d9c407b1 CL |
898 | /* |
899 | * 3.3.8 CREATE3args | |
900 | * | |
901 | * enum createmode3 { | |
902 | * UNCHECKED = 0, | |
903 | * GUARDED = 1, | |
904 | * EXCLUSIVE = 2 | |
905 | * }; | |
906 | * | |
907 | * union createhow3 switch (createmode3 mode) { | |
908 | * case UNCHECKED: | |
909 | * case GUARDED: | |
910 | * sattr3 obj_attributes; | |
911 | * case EXCLUSIVE: | |
912 | * createverf3 verf; | |
913 | * }; | |
914 | * | |
915 | * struct CREATE3args { | |
916 | * diropargs3 where; | |
917 | * createhow3 how; | |
918 | * }; | |
919 | */ | |
920 | static void encode_createhow3(struct xdr_stream *xdr, | |
921 | const struct nfs3_createargs *args) | |
922 | { | |
923 | encode_uint32(xdr, args->createmode); | |
924 | switch (args->createmode) { | |
925 | case NFS3_CREATE_UNCHECKED: | |
926 | case NFS3_CREATE_GUARDED: | |
927 | encode_sattr3(xdr, args->sattr); | |
928 | break; | |
929 | case NFS3_CREATE_EXCLUSIVE: | |
930 | encode_createverf3(xdr, args->verifier); | |
931 | break; | |
932 | default: | |
933 | BUG(); | |
934 | } | |
935 | } | |
936 | ||
937 | static int nfs3_xdr_enc_create3args(struct rpc_rqst *req, __be32 *p, | |
938 | const struct nfs3_createargs *args) | |
939 | { | |
940 | struct xdr_stream xdr; | |
941 | ||
942 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
943 | encode_diropargs3(&xdr, args->fh, args->name, args->len); | |
944 | encode_createhow3(&xdr, args); | |
945 | return 0; | |
946 | } | |
947 | ||
1da177e4 LT |
948 | /* |
949 | * Encode MKDIR arguments | |
950 | */ | |
951 | static int | |
d61005a6 | 952 | nfs3_xdr_mkdirargs(struct rpc_rqst *req, __be32 *p, struct nfs3_mkdirargs *args) |
1da177e4 LT |
953 | { |
954 | p = xdr_encode_fhandle(p, args->fh); | |
955 | p = xdr_encode_array(p, args->name, args->len); | |
956 | p = xdr_encode_sattr(p, args->sattr); | |
957 | req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); | |
958 | return 0; | |
959 | } | |
960 | ||
d9c407b1 CL |
961 | /* |
962 | * 3.3.9 MKDIR3args | |
963 | * | |
964 | * struct MKDIR3args { | |
965 | * diropargs3 where; | |
966 | * sattr3 attributes; | |
967 | * }; | |
968 | */ | |
969 | static int nfs3_xdr_enc_mkdir3args(struct rpc_rqst *req, __be32 *p, | |
970 | const struct nfs3_mkdirargs *args) | |
971 | { | |
972 | struct xdr_stream xdr; | |
973 | ||
974 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
975 | encode_diropargs3(&xdr, args->fh, args->name, args->len); | |
976 | encode_sattr3(&xdr, args->sattr); | |
977 | return 0; | |
978 | } | |
979 | ||
1da177e4 LT |
980 | /* |
981 | * Encode SYMLINK arguments | |
982 | */ | |
983 | static int | |
d61005a6 | 984 | nfs3_xdr_symlinkargs(struct rpc_rqst *req, __be32 *p, struct nfs3_symlinkargs *args) |
1da177e4 LT |
985 | { |
986 | p = xdr_encode_fhandle(p, args->fromfh); | |
987 | p = xdr_encode_array(p, args->fromname, args->fromlen); | |
988 | p = xdr_encode_sattr(p, args->sattr); | |
94a6d753 | 989 | *p++ = htonl(args->pathlen); |
1da177e4 | 990 | req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); |
94a6d753 CL |
991 | |
992 | /* Copy the page */ | |
993 | xdr_encode_pages(&req->rq_snd_buf, args->pages, 0, args->pathlen); | |
1da177e4 LT |
994 | return 0; |
995 | } | |
996 | ||
d9c407b1 CL |
997 | /* |
998 | * 3.3.10 SYMLINK3args | |
999 | * | |
1000 | * struct symlinkdata3 { | |
1001 | * sattr3 symlink_attributes; | |
1002 | * nfspath3 symlink_data; | |
1003 | * }; | |
1004 | * | |
1005 | * struct SYMLINK3args { | |
1006 | * diropargs3 where; | |
1007 | * symlinkdata3 symlink; | |
1008 | * }; | |
1009 | */ | |
1010 | static void encode_symlinkdata3(struct xdr_stream *xdr, | |
1011 | const struct nfs3_symlinkargs *args) | |
1012 | { | |
1013 | encode_sattr3(xdr, args->sattr); | |
1014 | encode_nfspath3(xdr, args->pages, args->pathlen); | |
1015 | } | |
1016 | ||
1017 | static int nfs3_xdr_enc_symlink3args(struct rpc_rqst *req, __be32 *p, | |
1018 | const struct nfs3_symlinkargs *args) | |
1019 | { | |
1020 | struct xdr_stream xdr; | |
1021 | ||
1022 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
1023 | encode_diropargs3(&xdr, args->fromfh, args->fromname, args->fromlen); | |
1024 | encode_symlinkdata3(&xdr, args); | |
1025 | return 0; | |
1026 | } | |
1027 | ||
1da177e4 LT |
1028 | /* |
1029 | * Encode MKNOD arguments | |
1030 | */ | |
1031 | static int | |
d61005a6 | 1032 | nfs3_xdr_mknodargs(struct rpc_rqst *req, __be32 *p, struct nfs3_mknodargs *args) |
1da177e4 LT |
1033 | { |
1034 | p = xdr_encode_fhandle(p, args->fh); | |
1035 | p = xdr_encode_array(p, args->name, args->len); | |
1036 | *p++ = htonl(args->type); | |
1037 | p = xdr_encode_sattr(p, args->sattr); | |
1038 | if (args->type == NF3CHR || args->type == NF3BLK) { | |
1039 | *p++ = htonl(MAJOR(args->rdev)); | |
1040 | *p++ = htonl(MINOR(args->rdev)); | |
1041 | } | |
1042 | ||
1043 | req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); | |
1044 | return 0; | |
1045 | } | |
1046 | ||
d9c407b1 CL |
1047 | /* |
1048 | * 3.3.11 MKNOD3args | |
1049 | * | |
1050 | * struct devicedata3 { | |
1051 | * sattr3 dev_attributes; | |
1052 | * specdata3 spec; | |
1053 | * }; | |
1054 | * | |
1055 | * union mknoddata3 switch (ftype3 type) { | |
1056 | * case NF3CHR: | |
1057 | * case NF3BLK: | |
1058 | * devicedata3 device; | |
1059 | * case NF3SOCK: | |
1060 | * case NF3FIFO: | |
1061 | * sattr3 pipe_attributes; | |
1062 | * default: | |
1063 | * void; | |
1064 | * }; | |
1065 | * | |
1066 | * struct MKNOD3args { | |
1067 | * diropargs3 where; | |
1068 | * mknoddata3 what; | |
1069 | * }; | |
1070 | */ | |
1071 | static void encode_devicedata3(struct xdr_stream *xdr, | |
1072 | const struct nfs3_mknodargs *args) | |
1073 | { | |
1074 | encode_sattr3(xdr, args->sattr); | |
1075 | encode_specdata3(xdr, args->rdev); | |
1076 | } | |
1077 | ||
1078 | static void encode_mknoddata3(struct xdr_stream *xdr, | |
1079 | const struct nfs3_mknodargs *args) | |
1080 | { | |
1081 | encode_ftype3(xdr, args->type); | |
1082 | switch (args->type) { | |
1083 | case NF3CHR: | |
1084 | case NF3BLK: | |
1085 | encode_devicedata3(xdr, args); | |
1086 | break; | |
1087 | case NF3SOCK: | |
1088 | case NF3FIFO: | |
1089 | encode_sattr3(xdr, args->sattr); | |
1090 | break; | |
1091 | case NF3REG: | |
1092 | case NF3DIR: | |
1093 | break; | |
1094 | default: | |
1095 | BUG(); | |
1096 | } | |
1097 | } | |
1098 | ||
1099 | static int nfs3_xdr_enc_mknod3args(struct rpc_rqst *req, __be32 *p, | |
1100 | const struct nfs3_mknodargs *args) | |
1101 | { | |
1102 | struct xdr_stream xdr; | |
1103 | ||
1104 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
1105 | encode_diropargs3(&xdr, args->fh, args->name, args->len); | |
1106 | encode_mknoddata3(&xdr, args); | |
1107 | return 0; | |
1108 | } | |
1109 | ||
1110 | /* | |
1111 | * 3.3.12 REMOVE3args | |
1112 | * | |
1113 | * struct REMOVE3args { | |
1114 | * diropargs3 object; | |
1115 | * }; | |
1116 | */ | |
1117 | static int nfs3_xdr_enc_remove3args(struct rpc_rqst *req, __be32 *p, | |
1118 | const struct nfs_removeargs *args) | |
1119 | { | |
1120 | struct xdr_stream xdr; | |
1121 | ||
1122 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
1123 | encode_diropargs3(&xdr, args->fh, args->name.name, args->name.len); | |
1124 | return 0; | |
1125 | } | |
1126 | ||
1da177e4 LT |
1127 | /* |
1128 | * Encode RENAME arguments | |
1129 | */ | |
1130 | static int | |
920769f0 | 1131 | nfs3_xdr_renameargs(struct rpc_rqst *req, __be32 *p, struct nfs_renameargs *args) |
1da177e4 | 1132 | { |
920769f0 JL |
1133 | p = xdr_encode_fhandle(p, args->old_dir); |
1134 | p = xdr_encode_array(p, args->old_name->name, args->old_name->len); | |
1135 | p = xdr_encode_fhandle(p, args->new_dir); | |
1136 | p = xdr_encode_array(p, args->new_name->name, args->new_name->len); | |
1da177e4 LT |
1137 | req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); |
1138 | return 0; | |
1139 | } | |
1140 | ||
d9c407b1 CL |
1141 | /* |
1142 | * 3.3.14 RENAME3args | |
1143 | * | |
1144 | * struct RENAME3args { | |
1145 | * diropargs3 from; | |
1146 | * diropargs3 to; | |
1147 | * }; | |
1148 | */ | |
1149 | static int nfs3_xdr_enc_rename3args(struct rpc_rqst *req, __be32 *p, | |
1150 | const struct nfs_renameargs *args) | |
1151 | { | |
1152 | const struct qstr *old = args->old_name; | |
1153 | const struct qstr *new = args->new_name; | |
1154 | struct xdr_stream xdr; | |
1155 | ||
1156 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
1157 | encode_diropargs3(&xdr, args->old_dir, old->name, old->len); | |
1158 | encode_diropargs3(&xdr, args->new_dir, new->name, new->len); | |
1159 | return 0; | |
1160 | } | |
1161 | ||
1da177e4 LT |
1162 | /* |
1163 | * Encode LINK arguments | |
1164 | */ | |
1165 | static int | |
d61005a6 | 1166 | nfs3_xdr_linkargs(struct rpc_rqst *req, __be32 *p, struct nfs3_linkargs *args) |
1da177e4 LT |
1167 | { |
1168 | p = xdr_encode_fhandle(p, args->fromfh); | |
1169 | p = xdr_encode_fhandle(p, args->tofh); | |
1170 | p = xdr_encode_array(p, args->toname, args->tolen); | |
1171 | req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); | |
1172 | return 0; | |
1173 | } | |
1174 | ||
d9c407b1 CL |
1175 | /* |
1176 | * 3.3.15 LINK3args | |
1177 | * | |
1178 | * struct LINK3args { | |
1179 | * nfs_fh3 file; | |
1180 | * diropargs3 link; | |
1181 | * }; | |
1182 | */ | |
1183 | static int nfs3_xdr_enc_link3args(struct rpc_rqst *req, __be32 *p, | |
1184 | const struct nfs3_linkargs *args) | |
1185 | { | |
1186 | struct xdr_stream xdr; | |
1187 | ||
1188 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
1189 | encode_nfs_fh3(&xdr, args->fromfh); | |
1190 | encode_diropargs3(&xdr, args->tofh, args->toname, args->tolen); | |
1191 | return 0; | |
1192 | } | |
1193 | ||
1da177e4 LT |
1194 | /* |
1195 | * Encode arguments to readdir call | |
1196 | */ | |
1197 | static int | |
d61005a6 | 1198 | nfs3_xdr_readdirargs(struct rpc_rqst *req, __be32 *p, struct nfs3_readdirargs *args) |
1da177e4 | 1199 | { |
a17c2153 | 1200 | struct rpc_auth *auth = req->rq_cred->cr_auth; |
1da177e4 LT |
1201 | unsigned int replen; |
1202 | u32 count = args->count; | |
1203 | ||
1204 | p = xdr_encode_fhandle(p, args->fh); | |
1205 | p = xdr_encode_hyper(p, args->cookie); | |
1206 | *p++ = args->verf[0]; | |
1207 | *p++ = args->verf[1]; | |
1208 | if (args->plus) { | |
1209 | /* readdirplus: need dircount + buffer size. | |
1210 | * We just make sure we make dircount big enough */ | |
1211 | *p++ = htonl(count >> 3); | |
1212 | } | |
1213 | *p++ = htonl(count); | |
1214 | req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); | |
1215 | ||
1216 | /* Inline the page array */ | |
1217 | replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS3_readdirres_sz) << 2; | |
1218 | xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages, 0, count); | |
1219 | return 0; | |
1220 | } | |
1221 | ||
d9c407b1 CL |
1222 | /* |
1223 | * 3.3.16 READDIR3args | |
1224 | * | |
1225 | * struct READDIR3args { | |
1226 | * nfs_fh3 dir; | |
1227 | * cookie3 cookie; | |
1228 | * cookieverf3 cookieverf; | |
1229 | * count3 count; | |
1230 | * }; | |
1231 | */ | |
1232 | static void encode_readdir3args(struct xdr_stream *xdr, | |
1233 | const struct nfs3_readdirargs *args) | |
1234 | { | |
1235 | __be32 *p; | |
1236 | ||
1237 | encode_nfs_fh3(xdr, args->fh); | |
1238 | ||
1239 | p = xdr_reserve_space(xdr, 8 + NFS3_COOKIEVERFSIZE + 4); | |
1240 | p = xdr_encode_cookie3(p, args->cookie); | |
1241 | p = xdr_encode_cookieverf3(p, args->verf); | |
1242 | *p = cpu_to_be32(args->count); | |
1243 | } | |
1244 | ||
1245 | static int nfs3_xdr_enc_readdir3args(struct rpc_rqst *req, __be32 *p, | |
1246 | const struct nfs3_readdirargs *args) | |
1247 | { | |
1248 | struct xdr_stream xdr; | |
1249 | ||
1250 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
1251 | encode_readdir3args(&xdr, args); | |
1252 | prepare_reply_buffer(req, args->pages, 0, | |
1253 | args->count, NFS3_readdirres_sz); | |
1254 | return 0; | |
1255 | } | |
1256 | ||
1257 | /* | |
1258 | * 3.3.17 READDIRPLUS3args | |
1259 | * | |
1260 | * struct READDIRPLUS3args { | |
1261 | * nfs_fh3 dir; | |
1262 | * cookie3 cookie; | |
1263 | * cookieverf3 cookieverf; | |
1264 | * count3 dircount; | |
1265 | * count3 maxcount; | |
1266 | * }; | |
1267 | */ | |
1268 | static void encode_readdirplus3args(struct xdr_stream *xdr, | |
1269 | const struct nfs3_readdirargs *args) | |
1270 | { | |
1271 | __be32 *p; | |
1272 | ||
1273 | encode_nfs_fh3(xdr, args->fh); | |
1274 | ||
1275 | p = xdr_reserve_space(xdr, 8 + NFS3_COOKIEVERFSIZE + 4 + 4); | |
1276 | p = xdr_encode_cookie3(p, args->cookie); | |
1277 | p = xdr_encode_cookieverf3(p, args->verf); | |
1278 | ||
1279 | /* | |
1280 | * readdirplus: need dircount + buffer size. | |
1281 | * We just make sure we make dircount big enough | |
1282 | */ | |
1283 | *p++ = cpu_to_be32(args->count >> 3); | |
1284 | ||
1285 | *p = cpu_to_be32(args->count); | |
1286 | } | |
1287 | ||
1288 | static int nfs3_xdr_enc_readdirplus3args(struct rpc_rqst *req, __be32 *p, | |
1289 | const struct nfs3_readdirargs *args) | |
1290 | { | |
1291 | struct xdr_stream xdr; | |
1292 | ||
1293 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
1294 | encode_readdirplus3args(&xdr, args); | |
1295 | prepare_reply_buffer(req, args->pages, 0, | |
1296 | args->count, NFS3_readdirres_sz); | |
1297 | return 0; | |
1298 | } | |
1299 | ||
1da177e4 LT |
1300 | /* |
1301 | * Decode the result of a readdir call. | |
1302 | * We just check for syntactical correctness. | |
1303 | */ | |
1304 | static int | |
d61005a6 | 1305 | nfs3_xdr_readdirres(struct rpc_rqst *req, __be32 *p, struct nfs3_readdirres *res) |
1da177e4 LT |
1306 | { |
1307 | struct xdr_buf *rcvbuf = &req->rq_rcv_buf; | |
1308 | struct kvec *iov = rcvbuf->head; | |
1309 | struct page **page; | |
c957c526 | 1310 | size_t hdrlen; |
afa8ccc9 | 1311 | u32 recvd, pglen; |
ac396128 | 1312 | int status; |
1da177e4 LT |
1313 | |
1314 | status = ntohl(*p++); | |
1315 | /* Decode post_op_attrs */ | |
1316 | p = xdr_decode_post_op_attr(p, res->dir_attr); | |
1317 | if (status) | |
856dff3d | 1318 | return nfs_stat_to_errno(status); |
1da177e4 LT |
1319 | /* Decode verifier cookie */ |
1320 | if (res->verf) { | |
1321 | res->verf[0] = *p++; | |
1322 | res->verf[1] = *p++; | |
1323 | } else { | |
1324 | p += 2; | |
1325 | } | |
1326 | ||
1327 | hdrlen = (u8 *) p - (u8 *) iov->iov_base; | |
1328 | if (iov->iov_len < hdrlen) { | |
fe82a183 | 1329 | dprintk("NFS: READDIR reply header overflowed:" |
c957c526 | 1330 | "length %Zu > %Zu\n", hdrlen, iov->iov_len); |
1da177e4 LT |
1331 | return -errno_NFSERR_IO; |
1332 | } else if (iov->iov_len != hdrlen) { | |
1333 | dprintk("NFS: READDIR header is short. iovec will be shifted.\n"); | |
1334 | xdr_shift_buf(rcvbuf, iov->iov_len - hdrlen); | |
1335 | } | |
1336 | ||
1337 | pglen = rcvbuf->page_len; | |
1338 | recvd = rcvbuf->len - hdrlen; | |
1339 | if (pglen > recvd) | |
1340 | pglen = recvd; | |
1341 | page = rcvbuf->pages; | |
643f8111 | 1342 | |
ac396128 | 1343 | return pglen; |
1da177e4 LT |
1344 | } |
1345 | ||
0dbb4c67 | 1346 | __be32 * |
82f2e547 | 1347 | nfs3_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, struct nfs_server *server, int plus) |
1da177e4 | 1348 | { |
babddc72 | 1349 | __be32 *p; |
1da177e4 LT |
1350 | struct nfs_entry old = *entry; |
1351 | ||
babddc72 BS |
1352 | p = xdr_inline_decode(xdr, 4); |
1353 | if (unlikely(!p)) | |
1354 | goto out_overflow; | |
1355 | if (!ntohl(*p++)) { | |
1356 | p = xdr_inline_decode(xdr, 4); | |
1357 | if (unlikely(!p)) | |
1358 | goto out_overflow; | |
1359 | if (!ntohl(*p++)) | |
1da177e4 LT |
1360 | return ERR_PTR(-EAGAIN); |
1361 | entry->eof = 1; | |
1362 | return ERR_PTR(-EBADCOOKIE); | |
1363 | } | |
1364 | ||
babddc72 BS |
1365 | p = xdr_inline_decode(xdr, 12); |
1366 | if (unlikely(!p)) | |
1367 | goto out_overflow; | |
1da177e4 LT |
1368 | p = xdr_decode_hyper(p, &entry->ino); |
1369 | entry->len = ntohl(*p++); | |
babddc72 BS |
1370 | |
1371 | p = xdr_inline_decode(xdr, entry->len + 8); | |
1372 | if (unlikely(!p)) | |
1373 | goto out_overflow; | |
1da177e4 LT |
1374 | entry->name = (const char *) p; |
1375 | p += XDR_QUADLEN(entry->len); | |
1376 | entry->prev_cookie = entry->cookie; | |
1377 | p = xdr_decode_hyper(p, &entry->cookie); | |
1378 | ||
0b26a0bf | 1379 | entry->d_type = DT_UNKNOWN; |
1da177e4 LT |
1380 | if (plus) { |
1381 | entry->fattr->valid = 0; | |
babddc72 BS |
1382 | p = xdr_decode_post_op_attr_stream(xdr, entry->fattr); |
1383 | if (IS_ERR(p)) | |
1384 | goto out_overflow_exit; | |
0b26a0bf | 1385 | entry->d_type = nfs_umode_to_dtype(entry->fattr->mode); |
1da177e4 | 1386 | /* In fact, a post_op_fh3: */ |
babddc72 BS |
1387 | p = xdr_inline_decode(xdr, 4); |
1388 | if (unlikely(!p)) | |
1389 | goto out_overflow; | |
1da177e4 | 1390 | if (*p++) { |
babddc72 BS |
1391 | p = xdr_decode_fhandle_stream(xdr, entry->fh); |
1392 | if (IS_ERR(p)) | |
1393 | goto out_overflow_exit; | |
1da177e4 LT |
1394 | /* Ugh -- server reply was truncated */ |
1395 | if (p == NULL) { | |
1396 | dprintk("NFS: FH truncated\n"); | |
1397 | *entry = old; | |
1398 | return ERR_PTR(-EAGAIN); | |
1399 | } | |
1400 | } else | |
1401 | memset((u8*)(entry->fh), 0, sizeof(*entry->fh)); | |
1402 | } | |
1403 | ||
babddc72 BS |
1404 | p = xdr_inline_peek(xdr, 8); |
1405 | if (p != NULL) | |
1406 | entry->eof = !p[0] && p[1]; | |
1407 | else | |
1408 | entry->eof = 0; | |
1409 | ||
1da177e4 | 1410 | return p; |
babddc72 BS |
1411 | |
1412 | out_overflow: | |
1413 | print_overflow_msg(__func__, xdr); | |
1414 | out_overflow_exit: | |
463a376e | 1415 | return ERR_PTR(-EAGAIN); |
1da177e4 LT |
1416 | } |
1417 | ||
1418 | /* | |
1419 | * Encode COMMIT arguments | |
1420 | */ | |
1421 | static int | |
d61005a6 | 1422 | nfs3_xdr_commitargs(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args) |
1da177e4 LT |
1423 | { |
1424 | p = xdr_encode_fhandle(p, args->fh); | |
1425 | p = xdr_encode_hyper(p, args->offset); | |
1426 | *p++ = htonl(args->count); | |
1427 | req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); | |
1428 | return 0; | |
1429 | } | |
1430 | ||
d9c407b1 CL |
1431 | /* |
1432 | * 3.3.21 COMMIT3args | |
1433 | * | |
1434 | * struct COMMIT3args { | |
1435 | * nfs_fh3 file; | |
1436 | * offset3 offset; | |
1437 | * count3 count; | |
1438 | * }; | |
1439 | */ | |
1440 | static void encode_commit3args(struct xdr_stream *xdr, | |
1441 | const struct nfs_writeargs *args) | |
1442 | { | |
1443 | __be32 *p; | |
1444 | ||
1445 | encode_nfs_fh3(xdr, args->fh); | |
1446 | ||
1447 | p = xdr_reserve_space(xdr, 8 + 4); | |
1448 | p = xdr_encode_hyper(p, args->offset); | |
1449 | *p = cpu_to_be32(args->count); | |
1450 | } | |
1451 | ||
1452 | static int nfs3_xdr_enc_commit3args(struct rpc_rqst *req, __be32 *p, | |
1453 | const struct nfs_writeargs *args) | |
1454 | { | |
1455 | struct xdr_stream xdr; | |
1456 | ||
1457 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
1458 | encode_commit3args(&xdr, args); | |
1459 | return 0; | |
1460 | } | |
1461 | ||
b7fa0554 AG |
1462 | #ifdef CONFIG_NFS_V3_ACL |
1463 | /* | |
1464 | * Encode GETACL arguments | |
1465 | */ | |
1466 | static int | |
d61005a6 | 1467 | nfs3_xdr_getaclargs(struct rpc_rqst *req, __be32 *p, |
b7fa0554 AG |
1468 | struct nfs3_getaclargs *args) |
1469 | { | |
a17c2153 | 1470 | struct rpc_auth *auth = req->rq_cred->cr_auth; |
b7fa0554 AG |
1471 | unsigned int replen; |
1472 | ||
1473 | p = xdr_encode_fhandle(p, args->fh); | |
1474 | *p++ = htonl(args->mask); | |
1475 | req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); | |
1476 | ||
1477 | if (args->mask & (NFS_ACL | NFS_DFACL)) { | |
1478 | /* Inline the page array */ | |
1479 | replen = (RPC_REPHDRSIZE + auth->au_rslack + | |
1480 | ACL3_getaclres_sz) << 2; | |
1481 | xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages, 0, | |
1482 | NFSACL_MAXPAGES << PAGE_SHIFT); | |
1483 | } | |
1484 | return 0; | |
1485 | } | |
1486 | ||
d9c407b1 CL |
1487 | static int nfs3_xdr_enc_getacl3args(struct rpc_rqst *req, __be32 *p, |
1488 | const struct nfs3_getaclargs *args) | |
1489 | { | |
1490 | struct xdr_stream xdr; | |
1491 | ||
1492 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
1493 | encode_nfs_fh3(&xdr, args->fh); | |
1494 | encode_uint32(&xdr, args->mask); | |
1495 | if (args->mask & (NFS_ACL | NFS_DFACL)) | |
1496 | prepare_reply_buffer(req, args->pages, 0, | |
1497 | NFSACL_MAXPAGES << PAGE_SHIFT, | |
1498 | ACL3_getaclres_sz); | |
1499 | return 0; | |
1500 | } | |
1501 | ||
b7fa0554 AG |
1502 | /* |
1503 | * Encode SETACL arguments | |
1504 | */ | |
1505 | static int | |
d61005a6 | 1506 | nfs3_xdr_setaclargs(struct rpc_rqst *req, __be32 *p, |
b7fa0554 AG |
1507 | struct nfs3_setaclargs *args) |
1508 | { | |
1509 | struct xdr_buf *buf = &req->rq_snd_buf; | |
ae46141f TM |
1510 | unsigned int base; |
1511 | int err; | |
b7fa0554 AG |
1512 | |
1513 | p = xdr_encode_fhandle(p, NFS_FH(args->inode)); | |
1514 | *p++ = htonl(args->mask); | |
ae46141f TM |
1515 | req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); |
1516 | base = req->rq_slen; | |
1517 | ||
1518 | if (args->npages != 0) | |
1519 | xdr_encode_pages(buf, args->pages, 0, args->len); | |
1520 | else | |
83404372 TM |
1521 | req->rq_slen = xdr_adjust_iovec(req->rq_svec, |
1522 | p + XDR_QUADLEN(args->len)); | |
b7fa0554 AG |
1523 | |
1524 | err = nfsacl_encode(buf, base, args->inode, | |
1525 | (args->mask & NFS_ACL) ? | |
1526 | args->acl_access : NULL, 1, 0); | |
1527 | if (err > 0) | |
1528 | err = nfsacl_encode(buf, base + err, args->inode, | |
1529 | (args->mask & NFS_DFACL) ? | |
1530 | args->acl_default : NULL, 1, | |
1531 | NFS_ACL_DEFAULT); | |
1532 | return (err > 0) ? 0 : err; | |
1533 | } | |
d9c407b1 CL |
1534 | |
1535 | static int nfs3_xdr_enc_setacl3args(struct rpc_rqst *req, __be32 *p, | |
1536 | const struct nfs3_setaclargs *args) | |
1537 | { | |
1538 | struct xdr_stream xdr; | |
1539 | unsigned int base; | |
1540 | int error; | |
1541 | ||
1542 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
1543 | encode_nfs_fh3(&xdr, NFS_FH(args->inode)); | |
1544 | encode_uint32(&xdr, args->mask); | |
1545 | if (args->npages != 0) | |
1546 | xdr_write_pages(&xdr, args->pages, 0, args->len); | |
1547 | ||
1548 | base = req->rq_slen; | |
1549 | error = nfsacl_encode(xdr.buf, base, args->inode, | |
1550 | (args->mask & NFS_ACL) ? | |
1551 | args->acl_access : NULL, 1, 0); | |
1552 | BUG_ON(error < 0); | |
1553 | error = nfsacl_encode(xdr.buf, base + error, args->inode, | |
1554 | (args->mask & NFS_DFACL) ? | |
1555 | args->acl_default : NULL, 1, | |
1556 | NFS_ACL_DEFAULT); | |
1557 | BUG_ON(error < 0); | |
1558 | return 0; | |
1559 | } | |
1560 | ||
b7fa0554 AG |
1561 | #endif /* CONFIG_NFS_V3_ACL */ |
1562 | ||
1da177e4 LT |
1563 | /* |
1564 | * NFS XDR decode functions | |
1565 | */ | |
1566 | ||
1567 | /* | |
1568 | * Decode attrstat reply. | |
1569 | */ | |
1570 | static int | |
d61005a6 | 1571 | nfs3_xdr_attrstat(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr) |
1da177e4 LT |
1572 | { |
1573 | int status; | |
1574 | ||
1575 | if ((status = ntohl(*p++))) | |
856dff3d | 1576 | return nfs_stat_to_errno(status); |
1da177e4 LT |
1577 | xdr_decode_fattr(p, fattr); |
1578 | return 0; | |
1579 | } | |
1580 | ||
1581 | /* | |
1582 | * Decode status+wcc_data reply | |
1583 | * SATTR, REMOVE, RMDIR | |
1584 | */ | |
1585 | static int | |
d61005a6 | 1586 | nfs3_xdr_wccstat(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr) |
1da177e4 LT |
1587 | { |
1588 | int status; | |
1589 | ||
1590 | if ((status = ntohl(*p++))) | |
856dff3d | 1591 | status = nfs_stat_to_errno(status); |
1da177e4 LT |
1592 | xdr_decode_wcc_data(p, fattr); |
1593 | return status; | |
1594 | } | |
1595 | ||
4fdc17b2 TM |
1596 | static int |
1597 | nfs3_xdr_removeres(struct rpc_rqst *req, __be32 *p, struct nfs_removeres *res) | |
1598 | { | |
d346890b | 1599 | return nfs3_xdr_wccstat(req, p, res->dir_attr); |
4fdc17b2 TM |
1600 | } |
1601 | ||
1da177e4 LT |
1602 | /* |
1603 | * Decode LOOKUP reply | |
1604 | */ | |
1605 | static int | |
d61005a6 | 1606 | nfs3_xdr_lookupres(struct rpc_rqst *req, __be32 *p, struct nfs3_diropres *res) |
1da177e4 LT |
1607 | { |
1608 | int status; | |
1609 | ||
1610 | if ((status = ntohl(*p++))) { | |
856dff3d | 1611 | status = nfs_stat_to_errno(status); |
1da177e4 LT |
1612 | } else { |
1613 | if (!(p = xdr_decode_fhandle(p, res->fh))) | |
1614 | return -errno_NFSERR_IO; | |
1615 | p = xdr_decode_post_op_attr(p, res->fattr); | |
1616 | } | |
1617 | xdr_decode_post_op_attr(p, res->dir_attr); | |
1618 | return status; | |
1619 | } | |
1620 | ||
1621 | /* | |
1622 | * Decode ACCESS reply | |
1623 | */ | |
1624 | static int | |
d61005a6 | 1625 | nfs3_xdr_accessres(struct rpc_rqst *req, __be32 *p, struct nfs3_accessres *res) |
1da177e4 LT |
1626 | { |
1627 | int status = ntohl(*p++); | |
1628 | ||
1629 | p = xdr_decode_post_op_attr(p, res->fattr); | |
1630 | if (status) | |
856dff3d | 1631 | return nfs_stat_to_errno(status); |
1da177e4 LT |
1632 | res->access = ntohl(*p++); |
1633 | return 0; | |
1634 | } | |
1635 | ||
1636 | static int | |
d61005a6 | 1637 | nfs3_xdr_readlinkargs(struct rpc_rqst *req, __be32 *p, struct nfs3_readlinkargs *args) |
1da177e4 | 1638 | { |
a17c2153 | 1639 | struct rpc_auth *auth = req->rq_cred->cr_auth; |
1da177e4 LT |
1640 | unsigned int replen; |
1641 | ||
1642 | p = xdr_encode_fhandle(p, args->fh); | |
1643 | req->rq_slen = xdr_adjust_iovec(req->rq_svec, p); | |
1644 | ||
1645 | /* Inline the page array */ | |
1646 | replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS3_readlinkres_sz) << 2; | |
1647 | xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages, args->pgbase, args->pglen); | |
1648 | return 0; | |
1649 | } | |
1650 | ||
1651 | /* | |
1652 | * Decode READLINK reply | |
1653 | */ | |
1654 | static int | |
d61005a6 | 1655 | nfs3_xdr_readlinkres(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr) |
1da177e4 LT |
1656 | { |
1657 | struct xdr_buf *rcvbuf = &req->rq_rcv_buf; | |
1658 | struct kvec *iov = rcvbuf->head; | |
c957c526 CL |
1659 | size_t hdrlen; |
1660 | u32 len, recvd; | |
1da177e4 LT |
1661 | int status; |
1662 | ||
1663 | status = ntohl(*p++); | |
1664 | p = xdr_decode_post_op_attr(p, fattr); | |
1665 | ||
1666 | if (status != 0) | |
856dff3d | 1667 | return nfs_stat_to_errno(status); |
1da177e4 LT |
1668 | |
1669 | /* Convert length of symlink */ | |
1670 | len = ntohl(*p++); | |
c957c526 | 1671 | if (len >= rcvbuf->page_len) { |
fe82a183 | 1672 | dprintk("nfs: server returned giant symlink!\n"); |
1da177e4 LT |
1673 | return -ENAMETOOLONG; |
1674 | } | |
1675 | ||
1676 | hdrlen = (u8 *) p - (u8 *) iov->iov_base; | |
1677 | if (iov->iov_len < hdrlen) { | |
fe82a183 | 1678 | dprintk("NFS: READLINK reply header overflowed:" |
c957c526 | 1679 | "length %Zu > %Zu\n", hdrlen, iov->iov_len); |
1da177e4 LT |
1680 | return -errno_NFSERR_IO; |
1681 | } else if (iov->iov_len != hdrlen) { | |
fe82a183 CL |
1682 | dprintk("NFS: READLINK header is short. " |
1683 | "iovec will be shifted.\n"); | |
1da177e4 LT |
1684 | xdr_shift_buf(rcvbuf, iov->iov_len - hdrlen); |
1685 | } | |
1686 | recvd = req->rq_rcv_buf.len - hdrlen; | |
1687 | if (recvd < len) { | |
fe82a183 | 1688 | dprintk("NFS: server cheating in readlink reply: " |
1da177e4 LT |
1689 | "count %u > recvd %u\n", len, recvd); |
1690 | return -EIO; | |
1691 | } | |
1692 | ||
b4687da7 | 1693 | xdr_terminate_string(rcvbuf, len); |
1da177e4 LT |
1694 | return 0; |
1695 | } | |
1696 | ||
1697 | /* | |
1698 | * Decode READ reply | |
1699 | */ | |
1700 | static int | |
d61005a6 | 1701 | nfs3_xdr_readres(struct rpc_rqst *req, __be32 *p, struct nfs_readres *res) |
1da177e4 LT |
1702 | { |
1703 | struct kvec *iov = req->rq_rcv_buf.head; | |
c957c526 CL |
1704 | size_t hdrlen; |
1705 | u32 count, ocount, recvd; | |
1706 | int status; | |
1da177e4 LT |
1707 | |
1708 | status = ntohl(*p++); | |
1709 | p = xdr_decode_post_op_attr(p, res->fattr); | |
1710 | ||
1711 | if (status != 0) | |
856dff3d | 1712 | return nfs_stat_to_errno(status); |
1da177e4 | 1713 | |
c957c526 | 1714 | /* Decode reply count and EOF flag. NFSv3 is somewhat redundant |
1da177e4 LT |
1715 | * in that it puts the count both in the res struct and in the |
1716 | * opaque data count. */ | |
1717 | count = ntohl(*p++); | |
1718 | res->eof = ntohl(*p++); | |
1719 | ocount = ntohl(*p++); | |
1720 | ||
1721 | if (ocount != count) { | |
fe82a183 | 1722 | dprintk("NFS: READ count doesn't match RPC opaque count.\n"); |
1da177e4 LT |
1723 | return -errno_NFSERR_IO; |
1724 | } | |
1725 | ||
1726 | hdrlen = (u8 *) p - (u8 *) iov->iov_base; | |
1727 | if (iov->iov_len < hdrlen) { | |
fe82a183 | 1728 | dprintk("NFS: READ reply header overflowed:" |
c957c526 | 1729 | "length %Zu > %Zu\n", hdrlen, iov->iov_len); |
1da177e4 LT |
1730 | return -errno_NFSERR_IO; |
1731 | } else if (iov->iov_len != hdrlen) { | |
1732 | dprintk("NFS: READ header is short. iovec will be shifted.\n"); | |
1733 | xdr_shift_buf(&req->rq_rcv_buf, iov->iov_len - hdrlen); | |
1734 | } | |
1735 | ||
1736 | recvd = req->rq_rcv_buf.len - hdrlen; | |
1737 | if (count > recvd) { | |
fe82a183 | 1738 | dprintk("NFS: server cheating in read reply: " |
c957c526 | 1739 | "count %u > recvd %u\n", count, recvd); |
1da177e4 LT |
1740 | count = recvd; |
1741 | res->eof = 0; | |
1742 | } | |
1743 | ||
1744 | if (count < res->count) | |
1745 | res->count = count; | |
1746 | ||
1747 | return count; | |
1748 | } | |
1749 | ||
1750 | /* | |
1751 | * Decode WRITE response | |
1752 | */ | |
1753 | static int | |
d61005a6 | 1754 | nfs3_xdr_writeres(struct rpc_rqst *req, __be32 *p, struct nfs_writeres *res) |
1da177e4 LT |
1755 | { |
1756 | int status; | |
1757 | ||
1758 | status = ntohl(*p++); | |
1759 | p = xdr_decode_wcc_data(p, res->fattr); | |
1760 | ||
1761 | if (status != 0) | |
856dff3d | 1762 | return nfs_stat_to_errno(status); |
1da177e4 LT |
1763 | |
1764 | res->count = ntohl(*p++); | |
1765 | res->verf->committed = (enum nfs3_stable_how)ntohl(*p++); | |
1766 | res->verf->verifier[0] = *p++; | |
1767 | res->verf->verifier[1] = *p++; | |
1768 | ||
1769 | return res->count; | |
1770 | } | |
1771 | ||
1772 | /* | |
1773 | * Decode a CREATE response | |
1774 | */ | |
1775 | static int | |
d61005a6 | 1776 | nfs3_xdr_createres(struct rpc_rqst *req, __be32 *p, struct nfs3_diropres *res) |
1da177e4 LT |
1777 | { |
1778 | int status; | |
1779 | ||
1780 | status = ntohl(*p++); | |
1781 | if (status == 0) { | |
1782 | if (*p++) { | |
1783 | if (!(p = xdr_decode_fhandle(p, res->fh))) | |
1784 | return -errno_NFSERR_IO; | |
1785 | p = xdr_decode_post_op_attr(p, res->fattr); | |
1786 | } else { | |
1787 | memset(res->fh, 0, sizeof(*res->fh)); | |
1788 | /* Do decode post_op_attr but set it to NULL */ | |
1789 | p = xdr_decode_post_op_attr(p, res->fattr); | |
1790 | res->fattr->valid = 0; | |
1791 | } | |
1792 | } else { | |
856dff3d | 1793 | status = nfs_stat_to_errno(status); |
1da177e4 LT |
1794 | } |
1795 | p = xdr_decode_wcc_data(p, res->dir_attr); | |
1796 | return status; | |
1797 | } | |
1798 | ||
1799 | /* | |
1800 | * Decode RENAME reply | |
1801 | */ | |
1802 | static int | |
e8582a8b | 1803 | nfs3_xdr_renameres(struct rpc_rqst *req, __be32 *p, struct nfs_renameres *res) |
1da177e4 LT |
1804 | { |
1805 | int status; | |
1806 | ||
1807 | if ((status = ntohl(*p++)) != 0) | |
856dff3d | 1808 | status = nfs_stat_to_errno(status); |
e8582a8b JL |
1809 | p = xdr_decode_wcc_data(p, res->old_fattr); |
1810 | p = xdr_decode_wcc_data(p, res->new_fattr); | |
1da177e4 LT |
1811 | return status; |
1812 | } | |
1813 | ||
1814 | /* | |
1815 | * Decode LINK reply | |
1816 | */ | |
1817 | static int | |
d61005a6 | 1818 | nfs3_xdr_linkres(struct rpc_rqst *req, __be32 *p, struct nfs3_linkres *res) |
1da177e4 LT |
1819 | { |
1820 | int status; | |
1821 | ||
1822 | if ((status = ntohl(*p++)) != 0) | |
856dff3d | 1823 | status = nfs_stat_to_errno(status); |
1da177e4 LT |
1824 | p = xdr_decode_post_op_attr(p, res->fattr); |
1825 | p = xdr_decode_wcc_data(p, res->dir_attr); | |
1826 | return status; | |
1827 | } | |
1828 | ||
1829 | /* | |
1830 | * Decode FSSTAT reply | |
1831 | */ | |
1832 | static int | |
d61005a6 | 1833 | nfs3_xdr_fsstatres(struct rpc_rqst *req, __be32 *p, struct nfs_fsstat *res) |
1da177e4 LT |
1834 | { |
1835 | int status; | |
1836 | ||
1837 | status = ntohl(*p++); | |
1838 | ||
1839 | p = xdr_decode_post_op_attr(p, res->fattr); | |
1840 | if (status != 0) | |
856dff3d | 1841 | return nfs_stat_to_errno(status); |
1da177e4 LT |
1842 | |
1843 | p = xdr_decode_hyper(p, &res->tbytes); | |
1844 | p = xdr_decode_hyper(p, &res->fbytes); | |
1845 | p = xdr_decode_hyper(p, &res->abytes); | |
1846 | p = xdr_decode_hyper(p, &res->tfiles); | |
1847 | p = xdr_decode_hyper(p, &res->ffiles); | |
1848 | p = xdr_decode_hyper(p, &res->afiles); | |
1849 | ||
1850 | /* ignore invarsec */ | |
1851 | return 0; | |
1852 | } | |
1853 | ||
1854 | /* | |
1855 | * Decode FSINFO reply | |
1856 | */ | |
1857 | static int | |
d61005a6 | 1858 | nfs3_xdr_fsinfores(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *res) |
1da177e4 LT |
1859 | { |
1860 | int status; | |
1861 | ||
1862 | status = ntohl(*p++); | |
1863 | ||
1864 | p = xdr_decode_post_op_attr(p, res->fattr); | |
1865 | if (status != 0) | |
856dff3d | 1866 | return nfs_stat_to_errno(status); |
1da177e4 LT |
1867 | |
1868 | res->rtmax = ntohl(*p++); | |
1869 | res->rtpref = ntohl(*p++); | |
1870 | res->rtmult = ntohl(*p++); | |
1871 | res->wtmax = ntohl(*p++); | |
1872 | res->wtpref = ntohl(*p++); | |
1873 | res->wtmult = ntohl(*p++); | |
1874 | res->dtpref = ntohl(*p++); | |
1875 | p = xdr_decode_hyper(p, &res->maxfilesize); | |
6b96724e | 1876 | p = xdr_decode_time3(p, &res->time_delta); |
1da177e4 | 1877 | |
6b96724e | 1878 | /* ignore properties */ |
1da177e4 LT |
1879 | res->lease_time = 0; |
1880 | return 0; | |
1881 | } | |
1882 | ||
1883 | /* | |
1884 | * Decode PATHCONF reply | |
1885 | */ | |
1886 | static int | |
d61005a6 | 1887 | nfs3_xdr_pathconfres(struct rpc_rqst *req, __be32 *p, struct nfs_pathconf *res) |
1da177e4 LT |
1888 | { |
1889 | int status; | |
1890 | ||
1891 | status = ntohl(*p++); | |
1892 | ||
1893 | p = xdr_decode_post_op_attr(p, res->fattr); | |
1894 | if (status != 0) | |
856dff3d | 1895 | return nfs_stat_to_errno(status); |
1da177e4 LT |
1896 | res->max_link = ntohl(*p++); |
1897 | res->max_namelen = ntohl(*p++); | |
1898 | ||
1899 | /* ignore remaining fields */ | |
1900 | return 0; | |
1901 | } | |
1902 | ||
1903 | /* | |
1904 | * Decode COMMIT reply | |
1905 | */ | |
1906 | static int | |
d61005a6 | 1907 | nfs3_xdr_commitres(struct rpc_rqst *req, __be32 *p, struct nfs_writeres *res) |
1da177e4 LT |
1908 | { |
1909 | int status; | |
1910 | ||
1911 | status = ntohl(*p++); | |
1912 | p = xdr_decode_wcc_data(p, res->fattr); | |
1913 | if (status != 0) | |
856dff3d | 1914 | return nfs_stat_to_errno(status); |
1da177e4 LT |
1915 | |
1916 | res->verf->verifier[0] = *p++; | |
1917 | res->verf->verifier[1] = *p++; | |
1918 | return 0; | |
1919 | } | |
1920 | ||
b7fa0554 AG |
1921 | #ifdef CONFIG_NFS_V3_ACL |
1922 | /* | |
1923 | * Decode GETACL reply | |
1924 | */ | |
1925 | static int | |
d61005a6 | 1926 | nfs3_xdr_getaclres(struct rpc_rqst *req, __be32 *p, |
b7fa0554 AG |
1927 | struct nfs3_getaclres *res) |
1928 | { | |
1929 | struct xdr_buf *buf = &req->rq_rcv_buf; | |
1930 | int status = ntohl(*p++); | |
1931 | struct posix_acl **acl; | |
1932 | unsigned int *aclcnt; | |
1933 | int err, base; | |
1934 | ||
1935 | if (status != 0) | |
856dff3d | 1936 | return nfs_stat_to_errno(status); |
b7fa0554 AG |
1937 | p = xdr_decode_post_op_attr(p, res->fattr); |
1938 | res->mask = ntohl(*p++); | |
1939 | if (res->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT)) | |
1940 | return -EINVAL; | |
1941 | base = (char *)p - (char *)req->rq_rcv_buf.head->iov_base; | |
1942 | ||
1943 | acl = (res->mask & NFS_ACL) ? &res->acl_access : NULL; | |
1944 | aclcnt = (res->mask & NFS_ACLCNT) ? &res->acl_access_count : NULL; | |
1945 | err = nfsacl_decode(buf, base, aclcnt, acl); | |
1946 | ||
1947 | acl = (res->mask & NFS_DFACL) ? &res->acl_default : NULL; | |
1948 | aclcnt = (res->mask & NFS_DFACLCNT) ? &res->acl_default_count : NULL; | |
1949 | if (err > 0) | |
1950 | err = nfsacl_decode(buf, base + err, aclcnt, acl); | |
1951 | return (err > 0) ? 0 : err; | |
1952 | } | |
1953 | ||
1954 | /* | |
1955 | * Decode setacl reply. | |
1956 | */ | |
1957 | static int | |
d61005a6 | 1958 | nfs3_xdr_setaclres(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr) |
b7fa0554 AG |
1959 | { |
1960 | int status = ntohl(*p++); | |
1961 | ||
1962 | if (status) | |
856dff3d | 1963 | return nfs_stat_to_errno(status); |
b7fa0554 AG |
1964 | xdr_decode_post_op_attr(p, fattr); |
1965 | return 0; | |
1966 | } | |
1967 | #endif /* CONFIG_NFS_V3_ACL */ | |
1968 | ||
1da177e4 LT |
1969 | #define PROC(proc, argtype, restype, timer) \ |
1970 | [NFS3PROC_##proc] = { \ | |
1971 | .p_proc = NFS3PROC_##proc, \ | |
1972 | .p_encode = (kxdrproc_t) nfs3_xdr_##argtype, \ | |
1973 | .p_decode = (kxdrproc_t) nfs3_xdr_##restype, \ | |
2bea90d4 CL |
1974 | .p_arglen = NFS3_##argtype##_sz, \ |
1975 | .p_replen = NFS3_##restype##_sz, \ | |
cc0175c1 CL |
1976 | .p_timer = timer, \ |
1977 | .p_statidx = NFS3PROC_##proc, \ | |
1978 | .p_name = #proc, \ | |
1da177e4 LT |
1979 | } |
1980 | ||
1981 | struct rpc_procinfo nfs3_procedures[] = { | |
1982 | PROC(GETATTR, fhandle, attrstat, 1), | |
1983 | PROC(SETATTR, sattrargs, wccstat, 0), | |
1984 | PROC(LOOKUP, diropargs, lookupres, 2), | |
1985 | PROC(ACCESS, accessargs, accessres, 1), | |
1986 | PROC(READLINK, readlinkargs, readlinkres, 3), | |
1987 | PROC(READ, readargs, readres, 3), | |
1988 | PROC(WRITE, writeargs, writeres, 4), | |
1989 | PROC(CREATE, createargs, createres, 0), | |
1990 | PROC(MKDIR, mkdirargs, createres, 0), | |
1991 | PROC(SYMLINK, symlinkargs, createres, 0), | |
1992 | PROC(MKNOD, mknodargs, createres, 0), | |
4fdc17b2 | 1993 | PROC(REMOVE, removeargs, removeres, 0), |
1da177e4 LT |
1994 | PROC(RMDIR, diropargs, wccstat, 0), |
1995 | PROC(RENAME, renameargs, renameres, 0), | |
1996 | PROC(LINK, linkargs, linkres, 0), | |
1997 | PROC(READDIR, readdirargs, readdirres, 3), | |
1998 | PROC(READDIRPLUS, readdirargs, readdirres, 3), | |
1999 | PROC(FSSTAT, fhandle, fsstatres, 0), | |
2000 | PROC(FSINFO, fhandle, fsinfores, 0), | |
2001 | PROC(PATHCONF, fhandle, pathconfres, 0), | |
2002 | PROC(COMMIT, commitargs, commitres, 5), | |
2003 | }; | |
2004 | ||
2005 | struct rpc_version nfs_version3 = { | |
2006 | .number = 3, | |
e8c96f8c | 2007 | .nrprocs = ARRAY_SIZE(nfs3_procedures), |
1da177e4 LT |
2008 | .procs = nfs3_procedures |
2009 | }; | |
2010 | ||
b7fa0554 AG |
2011 | #ifdef CONFIG_NFS_V3_ACL |
2012 | static struct rpc_procinfo nfs3_acl_procedures[] = { | |
2013 | [ACLPROC3_GETACL] = { | |
2014 | .p_proc = ACLPROC3_GETACL, | |
2015 | .p_encode = (kxdrproc_t) nfs3_xdr_getaclargs, | |
2016 | .p_decode = (kxdrproc_t) nfs3_xdr_getaclres, | |
2bea90d4 CL |
2017 | .p_arglen = ACL3_getaclargs_sz, |
2018 | .p_replen = ACL3_getaclres_sz, | |
b7fa0554 | 2019 | .p_timer = 1, |
cc0175c1 | 2020 | .p_name = "GETACL", |
b7fa0554 AG |
2021 | }, |
2022 | [ACLPROC3_SETACL] = { | |
2023 | .p_proc = ACLPROC3_SETACL, | |
2024 | .p_encode = (kxdrproc_t) nfs3_xdr_setaclargs, | |
2025 | .p_decode = (kxdrproc_t) nfs3_xdr_setaclres, | |
2bea90d4 CL |
2026 | .p_arglen = ACL3_setaclargs_sz, |
2027 | .p_replen = ACL3_setaclres_sz, | |
b7fa0554 | 2028 | .p_timer = 0, |
cc0175c1 | 2029 | .p_name = "SETACL", |
b7fa0554 AG |
2030 | }, |
2031 | }; | |
2032 | ||
2033 | struct rpc_version nfsacl_version3 = { | |
2034 | .number = 3, | |
2035 | .nrprocs = sizeof(nfs3_acl_procedures)/ | |
2036 | sizeof(nfs3_acl_procedures[0]), | |
2037 | .procs = nfs3_acl_procedures, | |
2038 | }; | |
2039 | #endif /* CONFIG_NFS_V3_ACL */ |