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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) |
f5fc3c50 | 41 | #define NFS3_wcc_attr_sz (6) |
1da177e4 LT |
42 | #define NFS3_pre_op_attr_sz (1+NFS3_wcc_attr_sz) |
43 | #define NFS3_post_op_attr_sz (1+NFS3_fattr_sz) | |
f5fc3c50 | 44 | #define NFS3_wcc_data_sz (NFS3_pre_op_attr_sz+NFS3_post_op_attr_sz) |
1da177e4 | 45 | #define NFS3_diropargs_sz (NFS3_fh_sz+NFS3_filename_sz) |
ad96b5b5 CL |
46 | |
47 | #define NFS3_getattrargs_sz (NFS3_fh_sz) | |
48 | #define NFS3_setattrargs_sz (NFS3_fh_sz+NFS3_sattr_sz+3) | |
49 | #define NFS3_lookupargs_sz (NFS3_fh_sz+NFS3_filename_sz) | |
1da177e4 LT |
50 | #define NFS3_accessargs_sz (NFS3_fh_sz+1) |
51 | #define NFS3_readlinkargs_sz (NFS3_fh_sz) | |
52 | #define NFS3_readargs_sz (NFS3_fh_sz+3) | |
53 | #define NFS3_writeargs_sz (NFS3_fh_sz+5) | |
54 | #define NFS3_createargs_sz (NFS3_diropargs_sz+NFS3_sattr_sz) | |
55 | #define NFS3_mkdirargs_sz (NFS3_diropargs_sz+NFS3_sattr_sz) | |
94a6d753 | 56 | #define NFS3_symlinkargs_sz (NFS3_diropargs_sz+1+NFS3_sattr_sz) |
1da177e4 | 57 | #define NFS3_mknodargs_sz (NFS3_diropargs_sz+2+NFS3_sattr_sz) |
ad96b5b5 | 58 | #define NFS3_removeargs_sz (NFS3_fh_sz+NFS3_filename_sz) |
1da177e4 LT |
59 | #define NFS3_renameargs_sz (NFS3_diropargs_sz+NFS3_diropargs_sz) |
60 | #define NFS3_linkargs_sz (NFS3_fh_sz+NFS3_diropargs_sz) | |
d9c407b1 CL |
61 | #define NFS3_readdirargs_sz (NFS3_fh_sz+NFS3_cookieverf_sz+3) |
62 | #define NFS3_readdirplusargs_sz (NFS3_fh_sz+NFS3_cookieverf_sz+4) | |
1da177e4 LT |
63 | #define NFS3_commitargs_sz (NFS3_fh_sz+3) |
64 | ||
f5fc3c50 CL |
65 | #define NFS3_getattrres_sz (1+NFS3_fattr_sz) |
66 | #define NFS3_setattrres_sz (1+NFS3_wcc_data_sz) | |
67 | #define NFS3_removeres_sz (NFS3_setattrres_sz) | |
1da177e4 LT |
68 | #define NFS3_lookupres_sz (1+NFS3_fh_sz+(2 * NFS3_post_op_attr_sz)) |
69 | #define NFS3_accessres_sz (1+NFS3_post_op_attr_sz+1) | |
70 | #define NFS3_readlinkres_sz (1+NFS3_post_op_attr_sz+1) | |
71 | #define NFS3_readres_sz (1+NFS3_post_op_attr_sz+3) | |
72 | #define NFS3_writeres_sz (1+NFS3_wcc_data_sz+4) | |
73 | #define NFS3_createres_sz (1+NFS3_fh_sz+NFS3_post_op_attr_sz+NFS3_wcc_data_sz) | |
74 | #define NFS3_renameres_sz (1+(2 * NFS3_wcc_data_sz)) | |
75 | #define NFS3_linkres_sz (1+NFS3_post_op_attr_sz+NFS3_wcc_data_sz) | |
76 | #define NFS3_readdirres_sz (1+NFS3_post_op_attr_sz+2) | |
77 | #define NFS3_fsstatres_sz (1+NFS3_post_op_attr_sz+13) | |
78 | #define NFS3_fsinfores_sz (1+NFS3_post_op_attr_sz+12) | |
79 | #define NFS3_pathconfres_sz (1+NFS3_post_op_attr_sz+6) | |
80 | #define NFS3_commitres_sz (1+NFS3_wcc_data_sz+2) | |
81 | ||
b7fa0554 | 82 | #define ACL3_getaclargs_sz (NFS3_fh_sz+1) |
ae46141f TM |
83 | #define ACL3_setaclargs_sz (NFS3_fh_sz+1+ \ |
84 | XDR_QUADLEN(NFS_ACL_INLINE_BUFSIZE)) | |
85 | #define ACL3_getaclres_sz (1+NFS3_post_op_attr_sz+1+ \ | |
86 | XDR_QUADLEN(NFS_ACL_INLINE_BUFSIZE)) | |
b7fa0554 AG |
87 | #define ACL3_setaclres_sz (1+NFS3_post_op_attr_sz) |
88 | ||
1da177e4 LT |
89 | /* |
90 | * Map file type to S_IFMT bits | |
91 | */ | |
bca79478 TM |
92 | static const umode_t nfs_type2fmt[] = { |
93 | [NF3BAD] = 0, | |
94 | [NF3REG] = S_IFREG, | |
95 | [NF3DIR] = S_IFDIR, | |
96 | [NF3BLK] = S_IFBLK, | |
97 | [NF3CHR] = S_IFCHR, | |
98 | [NF3LNK] = S_IFLNK, | |
99 | [NF3SOCK] = S_IFSOCK, | |
100 | [NF3FIFO] = S_IFIFO, | |
1da177e4 LT |
101 | }; |
102 | ||
d9c407b1 CL |
103 | /* |
104 | * While encoding arguments, set up the reply buffer in advance to | |
105 | * receive reply data directly into the page cache. | |
106 | */ | |
107 | static void prepare_reply_buffer(struct rpc_rqst *req, struct page **pages, | |
108 | unsigned int base, unsigned int len, | |
109 | unsigned int bufsize) | |
110 | { | |
111 | struct rpc_auth *auth = req->rq_cred->cr_auth; | |
112 | unsigned int replen; | |
113 | ||
114 | replen = RPC_REPHDRSIZE + auth->au_rslack + bufsize; | |
115 | xdr_inline_pages(&req->rq_rcv_buf, replen << 2, pages, base, len); | |
116 | } | |
117 | ||
e4f93234 CL |
118 | /* |
119 | * Handle decode buffer overflows out-of-line. | |
120 | */ | |
121 | static void print_overflow_msg(const char *func, const struct xdr_stream *xdr) | |
122 | { | |
123 | dprintk("NFS: %s prematurely hit the end of our receive buffer. " | |
124 | "Remaining buffer length is %tu words.\n", | |
125 | func, xdr->end - xdr->p); | |
126 | } | |
127 | ||
d9c407b1 | 128 | |
1da177e4 LT |
129 | /* |
130 | * Common NFS XDR functions as inlines | |
131 | */ | |
babddc72 | 132 | |
1da177e4 LT |
133 | /* |
134 | * Encode/decode time. | |
135 | */ | |
d61005a6 AV |
136 | static inline __be32 * |
137 | xdr_decode_time3(__be32 *p, struct timespec *timep) | |
1da177e4 LT |
138 | { |
139 | timep->tv_sec = ntohl(*p++); | |
140 | timep->tv_nsec = ntohl(*p++); | |
141 | return p; | |
142 | } | |
143 | ||
d61005a6 AV |
144 | static __be32 * |
145 | xdr_decode_fattr(__be32 *p, struct nfs_fattr *fattr) | |
1da177e4 LT |
146 | { |
147 | unsigned int type, major, minor; | |
bca79478 | 148 | umode_t fmode; |
1da177e4 LT |
149 | |
150 | type = ntohl(*p++); | |
bca79478 TM |
151 | if (type > NF3FIFO) |
152 | type = NF3NON; | |
153 | fmode = nfs_type2fmt[type]; | |
1da177e4 LT |
154 | fattr->mode = (ntohl(*p++) & ~S_IFMT) | fmode; |
155 | fattr->nlink = ntohl(*p++); | |
156 | fattr->uid = ntohl(*p++); | |
157 | fattr->gid = ntohl(*p++); | |
158 | p = xdr_decode_hyper(p, &fattr->size); | |
159 | p = xdr_decode_hyper(p, &fattr->du.nfs3.used); | |
160 | ||
161 | /* Turn remote device info into Linux-specific dev_t */ | |
162 | major = ntohl(*p++); | |
163 | minor = ntohl(*p++); | |
164 | fattr->rdev = MKDEV(major, minor); | |
165 | if (MAJOR(fattr->rdev) != major || MINOR(fattr->rdev) != minor) | |
166 | fattr->rdev = 0; | |
167 | ||
8b4bdcf8 TM |
168 | p = xdr_decode_hyper(p, &fattr->fsid.major); |
169 | fattr->fsid.minor = 0; | |
1da177e4 LT |
170 | p = xdr_decode_hyper(p, &fattr->fileid); |
171 | p = xdr_decode_time3(p, &fattr->atime); | |
172 | p = xdr_decode_time3(p, &fattr->mtime); | |
173 | p = xdr_decode_time3(p, &fattr->ctime); | |
174 | ||
175 | /* Update the mode bits */ | |
9e6e70f8 | 176 | fattr->valid |= NFS_ATTR_FATTR_V3; |
1da177e4 LT |
177 | return p; |
178 | } | |
179 | ||
d61005a6 AV |
180 | static inline __be32 * |
181 | xdr_decode_wcc_attr(__be32 *p, struct nfs_fattr *fattr) | |
1da177e4 LT |
182 | { |
183 | p = xdr_decode_hyper(p, &fattr->pre_size); | |
184 | p = xdr_decode_time3(p, &fattr->pre_mtime); | |
185 | p = xdr_decode_time3(p, &fattr->pre_ctime); | |
9e6e70f8 TM |
186 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE |
187 | | NFS_ATTR_FATTR_PREMTIME | |
188 | | NFS_ATTR_FATTR_PRECTIME; | |
1da177e4 LT |
189 | return p; |
190 | } | |
191 | ||
d9c407b1 CL |
192 | /* |
193 | * Encode/decode NFSv3 basic data types | |
194 | * | |
195 | * Basic NFSv3 data types are defined in section 2.5 of RFC 1813: | |
196 | * "NFS Version 3 Protocol Specification". | |
197 | * | |
198 | * Not all basic data types have their own encoding and decoding | |
199 | * functions. For run-time efficiency, some data types are encoded | |
200 | * or decoded inline. | |
201 | */ | |
202 | ||
203 | static void encode_uint32(struct xdr_stream *xdr, u32 value) | |
204 | { | |
205 | __be32 *p = xdr_reserve_space(xdr, 4); | |
206 | *p = cpu_to_be32(value); | |
207 | } | |
208 | ||
e4f93234 CL |
209 | static int decode_uint32(struct xdr_stream *xdr, u32 *value) |
210 | { | |
211 | __be32 *p; | |
212 | ||
213 | p = xdr_inline_decode(xdr, 4); | |
214 | if (unlikely(p == NULL)) | |
215 | goto out_overflow; | |
216 | *value = be32_to_cpup(p); | |
217 | return 0; | |
218 | out_overflow: | |
219 | print_overflow_msg(__func__, xdr); | |
220 | return -EIO; | |
221 | } | |
222 | ||
223 | static int decode_uint64(struct xdr_stream *xdr, u64 *value) | |
224 | { | |
225 | __be32 *p; | |
226 | ||
227 | p = xdr_inline_decode(xdr, 8); | |
228 | if (unlikely(p == NULL)) | |
229 | goto out_overflow; | |
230 | xdr_decode_hyper(p, value); | |
231 | return 0; | |
232 | out_overflow: | |
233 | print_overflow_msg(__func__, xdr); | |
234 | return -EIO; | |
235 | } | |
236 | ||
237 | /* | |
238 | * fileid3 | |
239 | * | |
240 | * typedef uint64 fileid3; | |
241 | */ | |
242 | static int decode_fileid3(struct xdr_stream *xdr, u64 *fileid) | |
243 | { | |
244 | return decode_uint64(xdr, fileid); | |
245 | } | |
246 | ||
d9c407b1 CL |
247 | /* |
248 | * filename3 | |
249 | * | |
250 | * typedef string filename3<>; | |
251 | */ | |
252 | static void encode_filename3(struct xdr_stream *xdr, | |
253 | const char *name, u32 length) | |
254 | { | |
255 | __be32 *p; | |
256 | ||
257 | BUG_ON(length > NFS3_MAXNAMLEN); | |
258 | p = xdr_reserve_space(xdr, 4 + length); | |
259 | xdr_encode_opaque(p, name, length); | |
260 | } | |
261 | ||
e4f93234 CL |
262 | static int decode_inline_filename3(struct xdr_stream *xdr, |
263 | const char **name, u32 *length) | |
264 | { | |
265 | __be32 *p; | |
266 | u32 count; | |
267 | ||
268 | p = xdr_inline_decode(xdr, 4); | |
269 | if (unlikely(p == NULL)) | |
270 | goto out_overflow; | |
271 | count = be32_to_cpup(p); | |
272 | if (count > NFS3_MAXNAMLEN) | |
273 | goto out_nametoolong; | |
274 | p = xdr_inline_decode(xdr, count); | |
275 | if (unlikely(p == NULL)) | |
276 | goto out_overflow; | |
277 | *name = (const char *)p; | |
278 | *length = count; | |
279 | return 0; | |
280 | ||
281 | out_nametoolong: | |
282 | dprintk("NFS: returned filename too long: %u\n", count); | |
283 | return -ENAMETOOLONG; | |
284 | out_overflow: | |
285 | print_overflow_msg(__func__, xdr); | |
286 | return -EIO; | |
287 | } | |
288 | ||
d9c407b1 CL |
289 | /* |
290 | * nfspath3 | |
291 | * | |
292 | * typedef string nfspath3<>; | |
293 | */ | |
294 | static void encode_nfspath3(struct xdr_stream *xdr, struct page **pages, | |
295 | const u32 length) | |
296 | { | |
297 | BUG_ON(length > NFS3_MAXPATHLEN); | |
298 | encode_uint32(xdr, length); | |
299 | xdr_write_pages(xdr, pages, 0, length); | |
300 | } | |
301 | ||
e4f93234 CL |
302 | static int decode_nfspath3(struct xdr_stream *xdr) |
303 | { | |
304 | u32 recvd, count; | |
305 | size_t hdrlen; | |
306 | __be32 *p; | |
307 | ||
308 | p = xdr_inline_decode(xdr, 4); | |
309 | if (unlikely(p == NULL)) | |
310 | goto out_overflow; | |
311 | count = be32_to_cpup(p); | |
312 | if (unlikely(count >= xdr->buf->page_len || count > NFS3_MAXPATHLEN)) | |
313 | goto out_nametoolong; | |
314 | hdrlen = (u8 *)xdr->p - (u8 *)xdr->iov->iov_base; | |
315 | recvd = xdr->buf->len - hdrlen; | |
316 | if (unlikely(count > recvd)) | |
317 | goto out_cheating; | |
318 | ||
319 | xdr_read_pages(xdr, count); | |
320 | xdr_terminate_string(xdr->buf, count); | |
321 | return 0; | |
322 | ||
323 | out_nametoolong: | |
324 | dprintk("NFS: returned pathname too long: %u\n", count); | |
325 | return -ENAMETOOLONG; | |
326 | out_cheating: | |
327 | dprintk("NFS: server cheating in pathname result: " | |
328 | "count %u > recvd %u\n", count, recvd); | |
329 | return -EIO; | |
330 | out_overflow: | |
331 | print_overflow_msg(__func__, xdr); | |
332 | return -EIO; | |
333 | } | |
334 | ||
d9c407b1 CL |
335 | /* |
336 | * cookie3 | |
337 | * | |
338 | * typedef uint64 cookie3 | |
339 | */ | |
340 | static __be32 *xdr_encode_cookie3(__be32 *p, u64 cookie) | |
341 | { | |
342 | return xdr_encode_hyper(p, cookie); | |
343 | } | |
344 | ||
e4f93234 CL |
345 | static int decode_cookie3(struct xdr_stream *xdr, u64 *cookie) |
346 | { | |
347 | return decode_uint64(xdr, cookie); | |
348 | } | |
349 | ||
d9c407b1 CL |
350 | /* |
351 | * cookieverf3 | |
352 | * | |
353 | * typedef opaque cookieverf3[NFS3_COOKIEVERFSIZE]; | |
354 | */ | |
355 | static __be32 *xdr_encode_cookieverf3(__be32 *p, const __be32 *verifier) | |
356 | { | |
357 | memcpy(p, verifier, NFS3_COOKIEVERFSIZE); | |
358 | return p + XDR_QUADLEN(NFS3_COOKIEVERFSIZE); | |
359 | } | |
360 | ||
e4f93234 CL |
361 | static int decode_cookieverf3(struct xdr_stream *xdr, __be32 *verifier) |
362 | { | |
363 | __be32 *p; | |
364 | ||
365 | p = xdr_inline_decode(xdr, NFS3_COOKIEVERFSIZE); | |
366 | if (unlikely(p == NULL)) | |
367 | goto out_overflow; | |
368 | memcpy(verifier, p, NFS3_COOKIEVERFSIZE); | |
369 | return 0; | |
370 | out_overflow: | |
371 | print_overflow_msg(__func__, xdr); | |
372 | return -EIO; | |
373 | } | |
374 | ||
d9c407b1 CL |
375 | /* |
376 | * createverf3 | |
377 | * | |
378 | * typedef opaque createverf3[NFS3_CREATEVERFSIZE]; | |
379 | */ | |
380 | static void encode_createverf3(struct xdr_stream *xdr, const __be32 *verifier) | |
381 | { | |
382 | __be32 *p; | |
383 | ||
384 | p = xdr_reserve_space(xdr, NFS3_CREATEVERFSIZE); | |
385 | memcpy(p, verifier, NFS3_CREATEVERFSIZE); | |
386 | } | |
387 | ||
e4f93234 CL |
388 | static int decode_writeverf3(struct xdr_stream *xdr, __be32 *verifier) |
389 | { | |
390 | __be32 *p; | |
391 | ||
392 | p = xdr_inline_decode(xdr, NFS3_WRITEVERFSIZE); | |
393 | if (unlikely(p == NULL)) | |
394 | goto out_overflow; | |
395 | memcpy(verifier, p, NFS3_WRITEVERFSIZE); | |
396 | return 0; | |
397 | out_overflow: | |
398 | print_overflow_msg(__func__, xdr); | |
399 | return -EIO; | |
400 | } | |
401 | ||
402 | /* | |
403 | * size3 | |
404 | * | |
405 | * typedef uint64 size3; | |
406 | */ | |
407 | static __be32 *xdr_decode_size3(__be32 *p, u64 *size) | |
408 | { | |
409 | return xdr_decode_hyper(p, size); | |
410 | } | |
411 | ||
412 | /* | |
413 | * nfsstat3 | |
414 | * | |
415 | * enum nfsstat3 { | |
416 | * NFS3_OK = 0, | |
417 | * ... | |
418 | * } | |
419 | */ | |
420 | #define NFS3_OK NFS_OK | |
421 | ||
422 | static int decode_nfsstat3(struct xdr_stream *xdr, enum nfs_stat *status) | |
423 | { | |
424 | __be32 *p; | |
425 | ||
426 | p = xdr_inline_decode(xdr, 4); | |
427 | if (unlikely(p == NULL)) | |
428 | goto out_overflow; | |
429 | *status = be32_to_cpup(p); | |
430 | return 0; | |
431 | out_overflow: | |
432 | print_overflow_msg(__func__, xdr); | |
433 | return -EIO; | |
434 | } | |
435 | ||
d9c407b1 CL |
436 | /* |
437 | * ftype3 | |
438 | * | |
439 | * enum ftype3 { | |
440 | * NF3REG = 1, | |
441 | * NF3DIR = 2, | |
442 | * NF3BLK = 3, | |
443 | * NF3CHR = 4, | |
444 | * NF3LNK = 5, | |
445 | * NF3SOCK = 6, | |
446 | * NF3FIFO = 7 | |
447 | * }; | |
448 | */ | |
449 | static void encode_ftype3(struct xdr_stream *xdr, const u32 type) | |
450 | { | |
451 | BUG_ON(type > NF3FIFO); | |
452 | encode_uint32(xdr, type); | |
453 | } | |
454 | ||
455 | /* | |
456 | * specdata3 | |
457 | * | |
458 | * struct specdata3 { | |
459 | * uint32 specdata1; | |
460 | * uint32 specdata2; | |
461 | * }; | |
462 | */ | |
463 | static void encode_specdata3(struct xdr_stream *xdr, const dev_t rdev) | |
464 | { | |
465 | __be32 *p; | |
466 | ||
467 | p = xdr_reserve_space(xdr, 8); | |
468 | *p++ = cpu_to_be32(MAJOR(rdev)); | |
469 | *p = cpu_to_be32(MINOR(rdev)); | |
470 | } | |
471 | ||
472 | /* | |
473 | * nfs_fh3 | |
474 | * | |
475 | * struct nfs_fh3 { | |
476 | * opaque data<NFS3_FHSIZE>; | |
477 | * }; | |
478 | */ | |
479 | static void encode_nfs_fh3(struct xdr_stream *xdr, const struct nfs_fh *fh) | |
480 | { | |
481 | __be32 *p; | |
482 | ||
483 | BUG_ON(fh->size > NFS3_FHSIZE); | |
484 | p = xdr_reserve_space(xdr, 4 + fh->size); | |
485 | xdr_encode_opaque(p, fh->data, fh->size); | |
486 | } | |
487 | ||
e4f93234 CL |
488 | static int decode_nfs_fh3(struct xdr_stream *xdr, struct nfs_fh *fh) |
489 | { | |
490 | u32 length; | |
491 | __be32 *p; | |
492 | ||
493 | p = xdr_inline_decode(xdr, 4); | |
494 | if (unlikely(p == NULL)) | |
495 | goto out_overflow; | |
496 | length = be32_to_cpup(p++); | |
497 | if (unlikely(length > NFS3_FHSIZE)) | |
498 | goto out_toobig; | |
499 | p = xdr_inline_decode(xdr, length); | |
500 | if (unlikely(p == NULL)) | |
501 | goto out_overflow; | |
502 | fh->size = length; | |
503 | memcpy(fh->data, p, length); | |
504 | return 0; | |
505 | out_toobig: | |
506 | dprintk("NFS: file handle size (%u) too big\n", length); | |
507 | return -E2BIG; | |
508 | out_overflow: | |
509 | print_overflow_msg(__func__, xdr); | |
510 | return -EIO; | |
511 | } | |
512 | ||
513 | static void zero_nfs_fh3(struct nfs_fh *fh) | |
514 | { | |
515 | memset(fh, 0, sizeof(*fh)); | |
516 | } | |
517 | ||
9d5a6434 CL |
518 | /* |
519 | * nfstime3 | |
520 | * | |
521 | * struct nfstime3 { | |
522 | * uint32 seconds; | |
523 | * uint32 nseconds; | |
524 | * }; | |
525 | */ | |
526 | static __be32 *xdr_encode_nfstime3(__be32 *p, const struct timespec *timep) | |
527 | { | |
528 | *p++ = cpu_to_be32(timep->tv_sec); | |
529 | *p++ = cpu_to_be32(timep->tv_nsec); | |
530 | return p; | |
531 | } | |
532 | ||
d9c407b1 CL |
533 | /* |
534 | * sattr3 | |
535 | * | |
536 | * enum time_how { | |
537 | * DONT_CHANGE = 0, | |
538 | * SET_TO_SERVER_TIME = 1, | |
539 | * SET_TO_CLIENT_TIME = 2 | |
540 | * }; | |
541 | * | |
542 | * union set_mode3 switch (bool set_it) { | |
543 | * case TRUE: | |
544 | * mode3 mode; | |
545 | * default: | |
546 | * void; | |
547 | * }; | |
548 | * | |
549 | * union set_uid3 switch (bool set_it) { | |
550 | * case TRUE: | |
551 | * uid3 uid; | |
552 | * default: | |
553 | * void; | |
554 | * }; | |
555 | * | |
556 | * union set_gid3 switch (bool set_it) { | |
557 | * case TRUE: | |
558 | * gid3 gid; | |
559 | * default: | |
560 | * void; | |
561 | * }; | |
562 | * | |
563 | * union set_size3 switch (bool set_it) { | |
564 | * case TRUE: | |
565 | * size3 size; | |
566 | * default: | |
567 | * void; | |
568 | * }; | |
569 | * | |
570 | * union set_atime switch (time_how set_it) { | |
571 | * case SET_TO_CLIENT_TIME: | |
572 | * nfstime3 atime; | |
573 | * default: | |
574 | * void; | |
575 | * }; | |
576 | * | |
577 | * union set_mtime switch (time_how set_it) { | |
578 | * case SET_TO_CLIENT_TIME: | |
579 | * nfstime3 mtime; | |
580 | * default: | |
581 | * void; | |
582 | * }; | |
583 | * | |
584 | * struct sattr3 { | |
585 | * set_mode3 mode; | |
586 | * set_uid3 uid; | |
587 | * set_gid3 gid; | |
588 | * set_size3 size; | |
589 | * set_atime atime; | |
590 | * set_mtime mtime; | |
591 | * }; | |
592 | */ | |
593 | static void encode_sattr3(struct xdr_stream *xdr, const struct iattr *attr) | |
594 | { | |
595 | u32 nbytes; | |
596 | __be32 *p; | |
597 | ||
598 | /* | |
599 | * In order to make only a single xdr_reserve_space() call, | |
600 | * pre-compute the total number of bytes to be reserved. | |
601 | * Six boolean values, one for each set_foo field, are always | |
602 | * present in the encoded result, so start there. | |
603 | */ | |
604 | nbytes = 6 * 4; | |
605 | if (attr->ia_valid & ATTR_MODE) | |
606 | nbytes += 4; | |
607 | if (attr->ia_valid & ATTR_UID) | |
608 | nbytes += 4; | |
609 | if (attr->ia_valid & ATTR_GID) | |
610 | nbytes += 4; | |
611 | if (attr->ia_valid & ATTR_SIZE) | |
612 | nbytes += 8; | |
613 | if (attr->ia_valid & ATTR_ATIME_SET) | |
614 | nbytes += 8; | |
615 | if (attr->ia_valid & ATTR_MTIME_SET) | |
616 | nbytes += 8; | |
617 | p = xdr_reserve_space(xdr, nbytes); | |
618 | ||
9d5a6434 CL |
619 | if (attr->ia_valid & ATTR_MODE) { |
620 | *p++ = xdr_one; | |
621 | *p++ = cpu_to_be32(attr->ia_mode & S_IALLUGO); | |
622 | } else | |
623 | *p++ = xdr_zero; | |
624 | ||
625 | if (attr->ia_valid & ATTR_UID) { | |
626 | *p++ = xdr_one; | |
627 | *p++ = cpu_to_be32(attr->ia_uid); | |
628 | } else | |
629 | *p++ = xdr_zero; | |
630 | ||
631 | if (attr->ia_valid & ATTR_GID) { | |
632 | *p++ = xdr_one; | |
633 | *p++ = cpu_to_be32(attr->ia_gid); | |
634 | } else | |
635 | *p++ = xdr_zero; | |
636 | ||
637 | if (attr->ia_valid & ATTR_SIZE) { | |
638 | *p++ = xdr_one; | |
639 | p = xdr_encode_hyper(p, (u64)attr->ia_size); | |
640 | } else | |
641 | *p++ = xdr_zero; | |
642 | ||
643 | if (attr->ia_valid & ATTR_ATIME_SET) { | |
644 | *p++ = xdr_two; | |
645 | p = xdr_encode_nfstime3(p, &attr->ia_atime); | |
646 | } else if (attr->ia_valid & ATTR_ATIME) { | |
647 | *p++ = xdr_one; | |
648 | } else | |
649 | *p++ = xdr_zero; | |
650 | ||
651 | if (attr->ia_valid & ATTR_MTIME_SET) { | |
652 | *p++ = xdr_two; | |
653 | xdr_encode_nfstime3(p, &attr->ia_mtime); | |
654 | } else if (attr->ia_valid & ATTR_MTIME) { | |
655 | *p = xdr_one; | |
656 | } else | |
657 | *p = xdr_zero; | |
d9c407b1 CL |
658 | } |
659 | ||
e4f93234 CL |
660 | /* |
661 | * fattr3 | |
662 | * | |
663 | * struct fattr3 { | |
664 | * ftype3 type; | |
665 | * mode3 mode; | |
666 | * uint32 nlink; | |
667 | * uid3 uid; | |
668 | * gid3 gid; | |
669 | * size3 size; | |
670 | * size3 used; | |
671 | * specdata3 rdev; | |
672 | * uint64 fsid; | |
673 | * fileid3 fileid; | |
674 | * nfstime3 atime; | |
675 | * nfstime3 mtime; | |
676 | * nfstime3 ctime; | |
677 | * }; | |
678 | */ | |
679 | static int decode_fattr3(struct xdr_stream *xdr, struct nfs_fattr *fattr) | |
680 | { | |
681 | __be32 *p; | |
682 | ||
683 | p = xdr_inline_decode(xdr, NFS3_fattr_sz << 2); | |
684 | if (unlikely(p == NULL)) | |
685 | goto out_overflow; | |
686 | xdr_decode_fattr(p, fattr); | |
687 | return 0; | |
688 | out_overflow: | |
689 | print_overflow_msg(__func__, xdr); | |
690 | return -EIO; | |
691 | } | |
692 | ||
693 | /* | |
694 | * post_op_attr | |
695 | * | |
696 | * union post_op_attr switch (bool attributes_follow) { | |
697 | * case TRUE: | |
698 | * fattr3 attributes; | |
699 | * case FALSE: | |
700 | * void; | |
701 | * }; | |
702 | */ | |
703 | static int decode_post_op_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr) | |
704 | { | |
705 | __be32 *p; | |
706 | ||
707 | p = xdr_inline_decode(xdr, 4); | |
708 | if (unlikely(p == NULL)) | |
709 | goto out_overflow; | |
710 | if (*p != xdr_zero) | |
711 | return decode_fattr3(xdr, fattr); | |
712 | return 0; | |
713 | out_overflow: | |
714 | print_overflow_msg(__func__, xdr); | |
715 | return -EIO; | |
716 | } | |
717 | ||
718 | /* | |
719 | * wcc_attr | |
720 | * struct wcc_attr { | |
721 | * size3 size; | |
722 | * nfstime3 mtime; | |
723 | * nfstime3 ctime; | |
724 | * }; | |
725 | */ | |
726 | static int decode_wcc_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr) | |
727 | { | |
728 | __be32 *p; | |
729 | ||
730 | p = xdr_inline_decode(xdr, NFS3_wcc_attr_sz << 2); | |
731 | if (unlikely(p == NULL)) | |
732 | goto out_overflow; | |
733 | xdr_decode_wcc_attr(p, fattr); | |
734 | return 0; | |
735 | out_overflow: | |
736 | print_overflow_msg(__func__, xdr); | |
737 | return -EIO; | |
738 | } | |
739 | ||
740 | /* | |
741 | * pre_op_attr | |
742 | * union pre_op_attr switch (bool attributes_follow) { | |
743 | * case TRUE: | |
744 | * wcc_attr attributes; | |
745 | * case FALSE: | |
746 | * void; | |
747 | * }; | |
748 | * | |
749 | * wcc_data | |
750 | * | |
751 | * struct wcc_data { | |
752 | * pre_op_attr before; | |
753 | * post_op_attr after; | |
754 | * }; | |
755 | */ | |
756 | static int decode_pre_op_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr) | |
757 | { | |
758 | __be32 *p; | |
759 | ||
760 | p = xdr_inline_decode(xdr, 4); | |
761 | if (unlikely(p == NULL)) | |
762 | goto out_overflow; | |
763 | if (*p != xdr_zero) | |
764 | return decode_wcc_attr(xdr, fattr); | |
765 | return 0; | |
766 | out_overflow: | |
767 | print_overflow_msg(__func__, xdr); | |
768 | return -EIO; | |
769 | } | |
770 | ||
771 | static int decode_wcc_data(struct xdr_stream *xdr, struct nfs_fattr *fattr) | |
772 | { | |
773 | int error; | |
774 | ||
775 | error = decode_pre_op_attr(xdr, fattr); | |
776 | if (unlikely(error)) | |
777 | goto out; | |
778 | error = decode_post_op_attr(xdr, fattr); | |
779 | out: | |
780 | return error; | |
781 | } | |
782 | ||
783 | /* | |
784 | * post_op_fh3 | |
785 | * | |
786 | * union post_op_fh3 switch (bool handle_follows) { | |
787 | * case TRUE: | |
788 | * nfs_fh3 handle; | |
789 | * case FALSE: | |
790 | * void; | |
791 | * }; | |
792 | */ | |
793 | static int decode_post_op_fh3(struct xdr_stream *xdr, struct nfs_fh *fh) | |
794 | { | |
795 | __be32 *p = xdr_inline_decode(xdr, 4); | |
796 | if (unlikely(p == NULL)) | |
797 | goto out_overflow; | |
798 | if (*p != xdr_zero) | |
799 | return decode_nfs_fh3(xdr, fh); | |
800 | zero_nfs_fh3(fh); | |
801 | return 0; | |
802 | out_overflow: | |
803 | print_overflow_msg(__func__, xdr); | |
804 | return -EIO; | |
805 | } | |
806 | ||
d9c407b1 CL |
807 | /* |
808 | * diropargs3 | |
809 | * | |
810 | * struct diropargs3 { | |
811 | * nfs_fh3 dir; | |
812 | * filename3 name; | |
813 | * }; | |
814 | */ | |
815 | static void encode_diropargs3(struct xdr_stream *xdr, const struct nfs_fh *fh, | |
816 | const char *name, u32 length) | |
817 | { | |
818 | encode_nfs_fh3(xdr, fh); | |
819 | encode_filename3(xdr, name, length); | |
820 | } | |
821 | ||
822 | ||
1da177e4 | 823 | /* |
499ff710 CL |
824 | * NFSv3 XDR encode functions |
825 | * | |
826 | * NFSv3 argument types are defined in section 3.3 of RFC 1813: | |
827 | * "NFS Version 3 Protocol Specification". | |
1da177e4 LT |
828 | */ |
829 | ||
d9c407b1 CL |
830 | /* |
831 | * 3.3.1 GETATTR3args | |
832 | * | |
833 | * struct GETATTR3args { | |
834 | * nfs_fh3 object; | |
835 | * }; | |
836 | */ | |
837 | static int nfs3_xdr_enc_getattr3args(struct rpc_rqst *req, __be32 *p, | |
838 | const struct nfs_fh *fh) | |
839 | { | |
840 | struct xdr_stream xdr; | |
841 | ||
842 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
843 | encode_nfs_fh3(&xdr, fh); | |
844 | return 0; | |
845 | } | |
846 | ||
d9c407b1 CL |
847 | /* |
848 | * 3.3.2 SETATTR3args | |
849 | * | |
850 | * union sattrguard3 switch (bool check) { | |
851 | * case TRUE: | |
852 | * nfstime3 obj_ctime; | |
853 | * case FALSE: | |
854 | * void; | |
855 | * }; | |
856 | * | |
857 | * struct SETATTR3args { | |
858 | * nfs_fh3 object; | |
859 | * sattr3 new_attributes; | |
860 | * sattrguard3 guard; | |
861 | * }; | |
862 | */ | |
863 | static void encode_sattrguard3(struct xdr_stream *xdr, | |
864 | const struct nfs3_sattrargs *args) | |
865 | { | |
866 | __be32 *p; | |
867 | ||
868 | if (args->guard) { | |
869 | p = xdr_reserve_space(xdr, 4 + 8); | |
870 | *p++ = xdr_one; | |
9d5a6434 | 871 | xdr_encode_nfstime3(p, &args->guardtime); |
d9c407b1 CL |
872 | } else { |
873 | p = xdr_reserve_space(xdr, 4); | |
874 | *p = xdr_zero; | |
875 | } | |
876 | } | |
877 | ||
878 | static int nfs3_xdr_enc_setattr3args(struct rpc_rqst *req, __be32 *p, | |
879 | const struct nfs3_sattrargs *args) | |
880 | { | |
881 | struct xdr_stream xdr; | |
882 | ||
883 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
884 | encode_nfs_fh3(&xdr, args->fh); | |
885 | encode_sattr3(&xdr, args->sattr); | |
886 | encode_sattrguard3(&xdr, args); | |
887 | return 0; | |
888 | } | |
889 | ||
d9c407b1 CL |
890 | /* |
891 | * 3.3.3 LOOKUP3args | |
892 | * | |
893 | * struct LOOKUP3args { | |
894 | * diropargs3 what; | |
895 | * }; | |
896 | */ | |
897 | static int nfs3_xdr_enc_lookup3args(struct rpc_rqst *req, __be32 *p, | |
898 | const struct nfs3_diropargs *args) | |
899 | { | |
900 | struct xdr_stream xdr; | |
901 | ||
902 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
903 | encode_diropargs3(&xdr, args->fh, args->name, args->len); | |
904 | return 0; | |
905 | } | |
906 | ||
d9c407b1 CL |
907 | /* |
908 | * 3.3.4 ACCESS3args | |
909 | * | |
910 | * struct ACCESS3args { | |
911 | * nfs_fh3 object; | |
912 | * uint32 access; | |
913 | * }; | |
914 | */ | |
915 | static void encode_access3args(struct xdr_stream *xdr, | |
916 | const struct nfs3_accessargs *args) | |
917 | { | |
918 | encode_nfs_fh3(xdr, args->fh); | |
919 | encode_uint32(xdr, args->access); | |
920 | } | |
921 | ||
922 | static int nfs3_xdr_enc_access3args(struct rpc_rqst *req, __be32 *p, | |
923 | const struct nfs3_accessargs *args) | |
924 | { | |
925 | struct xdr_stream xdr; | |
926 | ||
927 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
928 | encode_access3args(&xdr, args); | |
929 | return 0; | |
930 | } | |
931 | ||
932 | /* | |
933 | * 3.3.5 READLINK3args | |
934 | * | |
935 | * struct READLINK3args { | |
936 | * nfs_fh3 symlink; | |
937 | * }; | |
938 | */ | |
939 | static int nfs3_xdr_enc_readlink3args(struct rpc_rqst *req, __be32 *p, | |
940 | const struct nfs3_readlinkargs *args) | |
941 | { | |
942 | struct xdr_stream xdr; | |
943 | ||
944 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
945 | encode_nfs_fh3(&xdr, args->fh); | |
946 | prepare_reply_buffer(req, args->pages, args->pgbase, | |
947 | args->pglen, NFS3_readlinkres_sz); | |
948 | return 0; | |
949 | } | |
950 | ||
d9c407b1 CL |
951 | /* |
952 | * 3.3.6 READ3args | |
953 | * | |
954 | * struct READ3args { | |
955 | * nfs_fh3 file; | |
956 | * offset3 offset; | |
957 | * count3 count; | |
958 | * }; | |
959 | */ | |
960 | static void encode_read3args(struct xdr_stream *xdr, | |
961 | const struct nfs_readargs *args) | |
962 | { | |
963 | __be32 *p; | |
964 | ||
965 | encode_nfs_fh3(xdr, args->fh); | |
966 | ||
967 | p = xdr_reserve_space(xdr, 8 + 4); | |
968 | p = xdr_encode_hyper(p, args->offset); | |
969 | *p = cpu_to_be32(args->count); | |
970 | } | |
971 | ||
972 | static int nfs3_xdr_enc_read3args(struct rpc_rqst *req, __be32 *p, | |
973 | const struct nfs_readargs *args) | |
974 | { | |
975 | struct xdr_stream xdr; | |
976 | ||
977 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
978 | encode_read3args(&xdr, args); | |
979 | prepare_reply_buffer(req, args->pages, args->pgbase, | |
980 | args->count, NFS3_readres_sz); | |
981 | req->rq_rcv_buf.flags |= XDRBUF_READ; | |
982 | return 0; | |
983 | } | |
984 | ||
d9c407b1 CL |
985 | /* |
986 | * 3.3.7 WRITE3args | |
987 | * | |
988 | * enum stable_how { | |
989 | * UNSTABLE = 0, | |
990 | * DATA_SYNC = 1, | |
991 | * FILE_SYNC = 2 | |
992 | * }; | |
993 | * | |
994 | * struct WRITE3args { | |
995 | * nfs_fh3 file; | |
996 | * offset3 offset; | |
997 | * count3 count; | |
998 | * stable_how stable; | |
999 | * opaque data<>; | |
1000 | * }; | |
1001 | */ | |
1002 | static void encode_write3args(struct xdr_stream *xdr, | |
1003 | const struct nfs_writeargs *args) | |
1004 | { | |
1005 | __be32 *p; | |
1006 | ||
1007 | encode_nfs_fh3(xdr, args->fh); | |
1008 | ||
1009 | p = xdr_reserve_space(xdr, 8 + 4 + 4 + 4); | |
1010 | p = xdr_encode_hyper(p, args->offset); | |
1011 | *p++ = cpu_to_be32(args->count); | |
1012 | ||
1013 | BUG_ON(args->stable > NFS_FILE_SYNC); | |
1014 | *p++ = cpu_to_be32(args->stable); | |
1015 | ||
1016 | *p = cpu_to_be32(args->count); | |
1017 | xdr_write_pages(xdr, args->pages, args->pgbase, args->count); | |
1018 | } | |
1019 | ||
1020 | static int nfs3_xdr_enc_write3args(struct rpc_rqst *req, __be32 *p, | |
1021 | const struct nfs_writeargs *args) | |
1022 | { | |
1023 | struct xdr_stream xdr; | |
1024 | ||
1025 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
1026 | encode_write3args(&xdr, args); | |
1027 | xdr.buf->flags |= XDRBUF_WRITE; | |
1028 | return 0; | |
1029 | } | |
1030 | ||
d9c407b1 CL |
1031 | /* |
1032 | * 3.3.8 CREATE3args | |
1033 | * | |
1034 | * enum createmode3 { | |
1035 | * UNCHECKED = 0, | |
1036 | * GUARDED = 1, | |
1037 | * EXCLUSIVE = 2 | |
1038 | * }; | |
1039 | * | |
1040 | * union createhow3 switch (createmode3 mode) { | |
1041 | * case UNCHECKED: | |
1042 | * case GUARDED: | |
1043 | * sattr3 obj_attributes; | |
1044 | * case EXCLUSIVE: | |
1045 | * createverf3 verf; | |
1046 | * }; | |
1047 | * | |
1048 | * struct CREATE3args { | |
1049 | * diropargs3 where; | |
1050 | * createhow3 how; | |
1051 | * }; | |
1052 | */ | |
1053 | static void encode_createhow3(struct xdr_stream *xdr, | |
1054 | const struct nfs3_createargs *args) | |
1055 | { | |
1056 | encode_uint32(xdr, args->createmode); | |
1057 | switch (args->createmode) { | |
1058 | case NFS3_CREATE_UNCHECKED: | |
1059 | case NFS3_CREATE_GUARDED: | |
1060 | encode_sattr3(xdr, args->sattr); | |
1061 | break; | |
1062 | case NFS3_CREATE_EXCLUSIVE: | |
1063 | encode_createverf3(xdr, args->verifier); | |
1064 | break; | |
1065 | default: | |
1066 | BUG(); | |
1067 | } | |
1068 | } | |
1069 | ||
1070 | static int nfs3_xdr_enc_create3args(struct rpc_rqst *req, __be32 *p, | |
1071 | const struct nfs3_createargs *args) | |
1072 | { | |
1073 | struct xdr_stream xdr; | |
1074 | ||
1075 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
1076 | encode_diropargs3(&xdr, args->fh, args->name, args->len); | |
1077 | encode_createhow3(&xdr, args); | |
1078 | return 0; | |
1079 | } | |
1080 | ||
d9c407b1 CL |
1081 | /* |
1082 | * 3.3.9 MKDIR3args | |
1083 | * | |
1084 | * struct MKDIR3args { | |
1085 | * diropargs3 where; | |
1086 | * sattr3 attributes; | |
1087 | * }; | |
1088 | */ | |
1089 | static int nfs3_xdr_enc_mkdir3args(struct rpc_rqst *req, __be32 *p, | |
1090 | const struct nfs3_mkdirargs *args) | |
1091 | { | |
1092 | struct xdr_stream xdr; | |
1093 | ||
1094 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
1095 | encode_diropargs3(&xdr, args->fh, args->name, args->len); | |
1096 | encode_sattr3(&xdr, args->sattr); | |
1097 | return 0; | |
1098 | } | |
1099 | ||
d9c407b1 CL |
1100 | /* |
1101 | * 3.3.10 SYMLINK3args | |
1102 | * | |
1103 | * struct symlinkdata3 { | |
1104 | * sattr3 symlink_attributes; | |
1105 | * nfspath3 symlink_data; | |
1106 | * }; | |
1107 | * | |
1108 | * struct SYMLINK3args { | |
1109 | * diropargs3 where; | |
1110 | * symlinkdata3 symlink; | |
1111 | * }; | |
1112 | */ | |
1113 | static void encode_symlinkdata3(struct xdr_stream *xdr, | |
1114 | const struct nfs3_symlinkargs *args) | |
1115 | { | |
1116 | encode_sattr3(xdr, args->sattr); | |
1117 | encode_nfspath3(xdr, args->pages, args->pathlen); | |
1118 | } | |
1119 | ||
1120 | static int nfs3_xdr_enc_symlink3args(struct rpc_rqst *req, __be32 *p, | |
1121 | const struct nfs3_symlinkargs *args) | |
1122 | { | |
1123 | struct xdr_stream xdr; | |
1124 | ||
1125 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
1126 | encode_diropargs3(&xdr, args->fromfh, args->fromname, args->fromlen); | |
1127 | encode_symlinkdata3(&xdr, args); | |
1128 | return 0; | |
1129 | } | |
1130 | ||
d9c407b1 CL |
1131 | /* |
1132 | * 3.3.11 MKNOD3args | |
1133 | * | |
1134 | * struct devicedata3 { | |
1135 | * sattr3 dev_attributes; | |
1136 | * specdata3 spec; | |
1137 | * }; | |
1138 | * | |
1139 | * union mknoddata3 switch (ftype3 type) { | |
1140 | * case NF3CHR: | |
1141 | * case NF3BLK: | |
1142 | * devicedata3 device; | |
1143 | * case NF3SOCK: | |
1144 | * case NF3FIFO: | |
1145 | * sattr3 pipe_attributes; | |
1146 | * default: | |
1147 | * void; | |
1148 | * }; | |
1149 | * | |
1150 | * struct MKNOD3args { | |
1151 | * diropargs3 where; | |
1152 | * mknoddata3 what; | |
1153 | * }; | |
1154 | */ | |
1155 | static void encode_devicedata3(struct xdr_stream *xdr, | |
1156 | const struct nfs3_mknodargs *args) | |
1157 | { | |
1158 | encode_sattr3(xdr, args->sattr); | |
1159 | encode_specdata3(xdr, args->rdev); | |
1160 | } | |
1161 | ||
1162 | static void encode_mknoddata3(struct xdr_stream *xdr, | |
1163 | const struct nfs3_mknodargs *args) | |
1164 | { | |
1165 | encode_ftype3(xdr, args->type); | |
1166 | switch (args->type) { | |
1167 | case NF3CHR: | |
1168 | case NF3BLK: | |
1169 | encode_devicedata3(xdr, args); | |
1170 | break; | |
1171 | case NF3SOCK: | |
1172 | case NF3FIFO: | |
1173 | encode_sattr3(xdr, args->sattr); | |
1174 | break; | |
1175 | case NF3REG: | |
1176 | case NF3DIR: | |
1177 | break; | |
1178 | default: | |
1179 | BUG(); | |
1180 | } | |
1181 | } | |
1182 | ||
1183 | static int nfs3_xdr_enc_mknod3args(struct rpc_rqst *req, __be32 *p, | |
1184 | const struct nfs3_mknodargs *args) | |
1185 | { | |
1186 | struct xdr_stream xdr; | |
1187 | ||
1188 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
1189 | encode_diropargs3(&xdr, args->fh, args->name, args->len); | |
1190 | encode_mknoddata3(&xdr, args); | |
1191 | return 0; | |
1192 | } | |
1193 | ||
1194 | /* | |
1195 | * 3.3.12 REMOVE3args | |
1196 | * | |
1197 | * struct REMOVE3args { | |
1198 | * diropargs3 object; | |
1199 | * }; | |
1200 | */ | |
1201 | static int nfs3_xdr_enc_remove3args(struct rpc_rqst *req, __be32 *p, | |
1202 | const struct nfs_removeargs *args) | |
1203 | { | |
1204 | struct xdr_stream xdr; | |
1205 | ||
1206 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
1207 | encode_diropargs3(&xdr, args->fh, args->name.name, args->name.len); | |
1208 | return 0; | |
1209 | } | |
1210 | ||
d9c407b1 CL |
1211 | /* |
1212 | * 3.3.14 RENAME3args | |
1213 | * | |
1214 | * struct RENAME3args { | |
1215 | * diropargs3 from; | |
1216 | * diropargs3 to; | |
1217 | * }; | |
1218 | */ | |
1219 | static int nfs3_xdr_enc_rename3args(struct rpc_rqst *req, __be32 *p, | |
1220 | const struct nfs_renameargs *args) | |
1221 | { | |
1222 | const struct qstr *old = args->old_name; | |
1223 | const struct qstr *new = args->new_name; | |
1224 | struct xdr_stream xdr; | |
1225 | ||
1226 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
1227 | encode_diropargs3(&xdr, args->old_dir, old->name, old->len); | |
1228 | encode_diropargs3(&xdr, args->new_dir, new->name, new->len); | |
1229 | return 0; | |
1230 | } | |
1231 | ||
d9c407b1 CL |
1232 | /* |
1233 | * 3.3.15 LINK3args | |
1234 | * | |
1235 | * struct LINK3args { | |
1236 | * nfs_fh3 file; | |
1237 | * diropargs3 link; | |
1238 | * }; | |
1239 | */ | |
1240 | static int nfs3_xdr_enc_link3args(struct rpc_rqst *req, __be32 *p, | |
1241 | const struct nfs3_linkargs *args) | |
1242 | { | |
1243 | struct xdr_stream xdr; | |
1244 | ||
1245 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
1246 | encode_nfs_fh3(&xdr, args->fromfh); | |
1247 | encode_diropargs3(&xdr, args->tofh, args->toname, args->tolen); | |
1248 | return 0; | |
1249 | } | |
1250 | ||
d9c407b1 CL |
1251 | /* |
1252 | * 3.3.16 READDIR3args | |
1253 | * | |
1254 | * struct READDIR3args { | |
1255 | * nfs_fh3 dir; | |
1256 | * cookie3 cookie; | |
1257 | * cookieverf3 cookieverf; | |
1258 | * count3 count; | |
1259 | * }; | |
1260 | */ | |
1261 | static void encode_readdir3args(struct xdr_stream *xdr, | |
1262 | const struct nfs3_readdirargs *args) | |
1263 | { | |
1264 | __be32 *p; | |
1265 | ||
1266 | encode_nfs_fh3(xdr, args->fh); | |
1267 | ||
1268 | p = xdr_reserve_space(xdr, 8 + NFS3_COOKIEVERFSIZE + 4); | |
1269 | p = xdr_encode_cookie3(p, args->cookie); | |
1270 | p = xdr_encode_cookieverf3(p, args->verf); | |
1271 | *p = cpu_to_be32(args->count); | |
1272 | } | |
1273 | ||
1274 | static int nfs3_xdr_enc_readdir3args(struct rpc_rqst *req, __be32 *p, | |
1275 | const struct nfs3_readdirargs *args) | |
1276 | { | |
1277 | struct xdr_stream xdr; | |
1278 | ||
1279 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
1280 | encode_readdir3args(&xdr, args); | |
1281 | prepare_reply_buffer(req, args->pages, 0, | |
1282 | args->count, NFS3_readdirres_sz); | |
1283 | return 0; | |
1284 | } | |
1285 | ||
1286 | /* | |
1287 | * 3.3.17 READDIRPLUS3args | |
1288 | * | |
1289 | * struct READDIRPLUS3args { | |
1290 | * nfs_fh3 dir; | |
1291 | * cookie3 cookie; | |
1292 | * cookieverf3 cookieverf; | |
1293 | * count3 dircount; | |
1294 | * count3 maxcount; | |
1295 | * }; | |
1296 | */ | |
1297 | static void encode_readdirplus3args(struct xdr_stream *xdr, | |
1298 | const struct nfs3_readdirargs *args) | |
1299 | { | |
1300 | __be32 *p; | |
1301 | ||
1302 | encode_nfs_fh3(xdr, args->fh); | |
1303 | ||
1304 | p = xdr_reserve_space(xdr, 8 + NFS3_COOKIEVERFSIZE + 4 + 4); | |
1305 | p = xdr_encode_cookie3(p, args->cookie); | |
1306 | p = xdr_encode_cookieverf3(p, args->verf); | |
1307 | ||
1308 | /* | |
1309 | * readdirplus: need dircount + buffer size. | |
1310 | * We just make sure we make dircount big enough | |
1311 | */ | |
1312 | *p++ = cpu_to_be32(args->count >> 3); | |
1313 | ||
1314 | *p = cpu_to_be32(args->count); | |
1315 | } | |
1316 | ||
1317 | static int nfs3_xdr_enc_readdirplus3args(struct rpc_rqst *req, __be32 *p, | |
1318 | const struct nfs3_readdirargs *args) | |
1319 | { | |
1320 | struct xdr_stream xdr; | |
1321 | ||
1322 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
1323 | encode_readdirplus3args(&xdr, args); | |
1324 | prepare_reply_buffer(req, args->pages, 0, | |
1325 | args->count, NFS3_readdirres_sz); | |
1326 | return 0; | |
1327 | } | |
1328 | ||
d9c407b1 CL |
1329 | /* |
1330 | * 3.3.21 COMMIT3args | |
1331 | * | |
1332 | * struct COMMIT3args { | |
1333 | * nfs_fh3 file; | |
1334 | * offset3 offset; | |
1335 | * count3 count; | |
1336 | * }; | |
1337 | */ | |
1338 | static void encode_commit3args(struct xdr_stream *xdr, | |
1339 | const struct nfs_writeargs *args) | |
1340 | { | |
1341 | __be32 *p; | |
1342 | ||
1343 | encode_nfs_fh3(xdr, args->fh); | |
1344 | ||
1345 | p = xdr_reserve_space(xdr, 8 + 4); | |
1346 | p = xdr_encode_hyper(p, args->offset); | |
1347 | *p = cpu_to_be32(args->count); | |
1348 | } | |
1349 | ||
1350 | static int nfs3_xdr_enc_commit3args(struct rpc_rqst *req, __be32 *p, | |
1351 | const struct nfs_writeargs *args) | |
1352 | { | |
1353 | struct xdr_stream xdr; | |
1354 | ||
1355 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
1356 | encode_commit3args(&xdr, args); | |
1357 | return 0; | |
1358 | } | |
1359 | ||
b7fa0554 | 1360 | #ifdef CONFIG_NFS_V3_ACL |
b7fa0554 | 1361 | |
d9c407b1 CL |
1362 | static int nfs3_xdr_enc_getacl3args(struct rpc_rqst *req, __be32 *p, |
1363 | const struct nfs3_getaclargs *args) | |
1364 | { | |
1365 | struct xdr_stream xdr; | |
1366 | ||
1367 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
1368 | encode_nfs_fh3(&xdr, args->fh); | |
1369 | encode_uint32(&xdr, args->mask); | |
1370 | if (args->mask & (NFS_ACL | NFS_DFACL)) | |
1371 | prepare_reply_buffer(req, args->pages, 0, | |
1372 | NFSACL_MAXPAGES << PAGE_SHIFT, | |
1373 | ACL3_getaclres_sz); | |
1374 | return 0; | |
1375 | } | |
1376 | ||
d9c407b1 CL |
1377 | static int nfs3_xdr_enc_setacl3args(struct rpc_rqst *req, __be32 *p, |
1378 | const struct nfs3_setaclargs *args) | |
1379 | { | |
1380 | struct xdr_stream xdr; | |
1381 | unsigned int base; | |
1382 | int error; | |
1383 | ||
1384 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); | |
1385 | encode_nfs_fh3(&xdr, NFS_FH(args->inode)); | |
1386 | encode_uint32(&xdr, args->mask); | |
1387 | if (args->npages != 0) | |
1388 | xdr_write_pages(&xdr, args->pages, 0, args->len); | |
1389 | ||
1390 | base = req->rq_slen; | |
1391 | error = nfsacl_encode(xdr.buf, base, args->inode, | |
1392 | (args->mask & NFS_ACL) ? | |
1393 | args->acl_access : NULL, 1, 0); | |
1394 | BUG_ON(error < 0); | |
1395 | error = nfsacl_encode(xdr.buf, base + error, args->inode, | |
1396 | (args->mask & NFS_DFACL) ? | |
1397 | args->acl_default : NULL, 1, | |
1398 | NFS_ACL_DEFAULT); | |
1399 | BUG_ON(error < 0); | |
1400 | return 0; | |
1401 | } | |
1402 | ||
b7fa0554 AG |
1403 | #endif /* CONFIG_NFS_V3_ACL */ |
1404 | ||
1da177e4 | 1405 | /* |
b2cdd9c9 CL |
1406 | * NFSv3 XDR decode functions |
1407 | * | |
1408 | * NFSv3 result types are defined in section 3.3 of RFC 1813: | |
1409 | * "NFS Version 3 Protocol Specification". | |
1da177e4 | 1410 | */ |
1da177e4 LT |
1411 | |
1412 | /* | |
e4f93234 CL |
1413 | * 3.3.1 GETATTR3res |
1414 | * | |
1415 | * struct GETATTR3resok { | |
1416 | * fattr3 obj_attributes; | |
1417 | * }; | |
1418 | * | |
1419 | * union GETATTR3res switch (nfsstat3 status) { | |
1420 | * case NFS3_OK: | |
1421 | * GETATTR3resok resok; | |
1422 | * default: | |
1423 | * void; | |
1424 | * }; | |
1da177e4 | 1425 | */ |
e4f93234 CL |
1426 | static int nfs3_xdr_dec_getattr3res(struct rpc_rqst *req, __be32 *p, |
1427 | struct nfs_fattr *result) | |
1da177e4 | 1428 | { |
e4f93234 CL |
1429 | struct xdr_stream xdr; |
1430 | enum nfs_stat status; | |
1431 | int error; | |
1432 | ||
1433 | xdr_init_decode(&xdr, &req->rq_rcv_buf, p); | |
1434 | error = decode_nfsstat3(&xdr, &status); | |
1435 | if (unlikely(error)) | |
1436 | goto out; | |
1437 | if (status != NFS3_OK) | |
1438 | goto out_default; | |
1439 | error = decode_fattr3(&xdr, result); | |
1440 | out: | |
1441 | return error; | |
1442 | out_default: | |
1443 | return nfs_stat_to_errno(status); | |
1444 | } | |
1445 | ||
e4f93234 CL |
1446 | /* |
1447 | * 3.3.2 SETATTR3res | |
1448 | * | |
1449 | * struct SETATTR3resok { | |
1450 | * wcc_data obj_wcc; | |
1451 | * }; | |
1452 | * | |
1453 | * struct SETATTR3resfail { | |
1454 | * wcc_data obj_wcc; | |
1455 | * }; | |
1456 | * | |
1457 | * union SETATTR3res switch (nfsstat3 status) { | |
1458 | * case NFS3_OK: | |
1459 | * SETATTR3resok resok; | |
1460 | * default: | |
1461 | * SETATTR3resfail resfail; | |
1462 | * }; | |
1463 | */ | |
1464 | static int nfs3_xdr_dec_setattr3res(struct rpc_rqst *req, __be32 *p, | |
1465 | struct nfs_fattr *result) | |
1466 | { | |
1467 | struct xdr_stream xdr; | |
1468 | enum nfs_stat status; | |
1469 | int error; | |
1470 | ||
1471 | xdr_init_decode(&xdr, &req->rq_rcv_buf, p); | |
1472 | error = decode_nfsstat3(&xdr, &status); | |
1473 | if (unlikely(error)) | |
1474 | goto out; | |
1475 | error = decode_wcc_data(&xdr, result); | |
1476 | if (unlikely(error)) | |
1477 | goto out; | |
1478 | if (status != NFS3_OK) | |
1479 | goto out_status; | |
1480 | out: | |
1481 | return error; | |
1482 | out_status: | |
1483 | return nfs_stat_to_errno(status); | |
1484 | } | |
1485 | ||
e4f93234 CL |
1486 | /* |
1487 | * 3.3.3 LOOKUP3res | |
1488 | * | |
1489 | * struct LOOKUP3resok { | |
1490 | * nfs_fh3 object; | |
1491 | * post_op_attr obj_attributes; | |
1492 | * post_op_attr dir_attributes; | |
1493 | * }; | |
1494 | * | |
1495 | * struct LOOKUP3resfail { | |
1496 | * post_op_attr dir_attributes; | |
1497 | * }; | |
1498 | * | |
1499 | * union LOOKUP3res switch (nfsstat3 status) { | |
1500 | * case NFS3_OK: | |
1501 | * LOOKUP3resok resok; | |
1502 | * default: | |
1503 | * LOOKUP3resfail resfail; | |
1504 | * }; | |
1505 | */ | |
1506 | static int nfs3_xdr_dec_lookup3res(struct rpc_rqst *req, __be32 *p, | |
1507 | struct nfs3_diropres *result) | |
1508 | { | |
1509 | struct xdr_stream xdr; | |
1510 | enum nfs_stat status; | |
1511 | int error; | |
1512 | ||
1513 | xdr_init_decode(&xdr, &req->rq_rcv_buf, p); | |
1514 | error = decode_nfsstat3(&xdr, &status); | |
1515 | if (unlikely(error)) | |
1516 | goto out; | |
1517 | if (status != NFS3_OK) | |
1518 | goto out_default; | |
1519 | error = decode_nfs_fh3(&xdr, result->fh); | |
1520 | if (unlikely(error)) | |
1521 | goto out; | |
1522 | error = decode_post_op_attr(&xdr, result->fattr); | |
1523 | if (unlikely(error)) | |
1524 | goto out; | |
1525 | error = decode_post_op_attr(&xdr, result->dir_attr); | |
1526 | out: | |
1527 | return error; | |
1528 | out_default: | |
1529 | error = decode_post_op_attr(&xdr, result->dir_attr); | |
1530 | if (unlikely(error)) | |
1531 | goto out; | |
1532 | return nfs_stat_to_errno(status); | |
1533 | } | |
1534 | ||
e4f93234 CL |
1535 | /* |
1536 | * 3.3.4 ACCESS3res | |
1537 | * | |
1538 | * struct ACCESS3resok { | |
1539 | * post_op_attr obj_attributes; | |
1540 | * uint32 access; | |
1541 | * }; | |
1542 | * | |
1543 | * struct ACCESS3resfail { | |
1544 | * post_op_attr obj_attributes; | |
1545 | * }; | |
1546 | * | |
1547 | * union ACCESS3res switch (nfsstat3 status) { | |
1548 | * case NFS3_OK: | |
1549 | * ACCESS3resok resok; | |
1550 | * default: | |
1551 | * ACCESS3resfail resfail; | |
1552 | * }; | |
1553 | */ | |
1554 | static int nfs3_xdr_dec_access3res(struct rpc_rqst *req, __be32 *p, | |
1555 | struct nfs3_accessres *result) | |
1556 | { | |
1557 | struct xdr_stream xdr; | |
1558 | enum nfs_stat status; | |
1559 | int error; | |
1560 | ||
1561 | xdr_init_decode(&xdr, &req->rq_rcv_buf, p); | |
1562 | error = decode_nfsstat3(&xdr, &status); | |
1563 | if (unlikely(error)) | |
1564 | goto out; | |
1565 | error = decode_post_op_attr(&xdr, result->fattr); | |
1566 | if (unlikely(error)) | |
1567 | goto out; | |
1568 | if (status != NFS3_OK) | |
1569 | goto out_default; | |
1570 | error = decode_uint32(&xdr, &result->access); | |
1571 | out: | |
1572 | return error; | |
1573 | out_default: | |
1574 | return nfs_stat_to_errno(status); | |
1575 | } | |
1576 | ||
e4f93234 CL |
1577 | /* |
1578 | * 3.3.5 READLINK3res | |
1579 | * | |
1580 | * struct READLINK3resok { | |
1581 | * post_op_attr symlink_attributes; | |
1582 | * nfspath3 data; | |
1583 | * }; | |
1584 | * | |
1585 | * struct READLINK3resfail { | |
1586 | * post_op_attr symlink_attributes; | |
1587 | * }; | |
1588 | * | |
1589 | * union READLINK3res switch (nfsstat3 status) { | |
1590 | * case NFS3_OK: | |
1591 | * READLINK3resok resok; | |
1592 | * default: | |
1593 | * READLINK3resfail resfail; | |
1594 | * }; | |
1595 | */ | |
1596 | static int nfs3_xdr_dec_readlink3res(struct rpc_rqst *req, __be32 *p, | |
1597 | struct nfs_fattr *result) | |
1598 | { | |
1599 | struct xdr_stream xdr; | |
1600 | enum nfs_stat status; | |
1601 | int error; | |
1602 | ||
1603 | xdr_init_decode(&xdr, &req->rq_rcv_buf, p); | |
1604 | error = decode_nfsstat3(&xdr, &status); | |
1605 | if (unlikely(error)) | |
1606 | goto out; | |
1607 | error = decode_post_op_attr(&xdr, result); | |
1608 | if (unlikely(error)) | |
1609 | goto out; | |
1610 | if (status != NFS3_OK) | |
1611 | goto out_default; | |
1612 | error = decode_nfspath3(&xdr); | |
1613 | out: | |
1614 | return error; | |
1615 | out_default: | |
1616 | return nfs_stat_to_errno(status); | |
1617 | } | |
1618 | ||
e4f93234 CL |
1619 | /* |
1620 | * 3.3.6 READ3res | |
1621 | * | |
1622 | * struct READ3resok { | |
1623 | * post_op_attr file_attributes; | |
1624 | * count3 count; | |
1625 | * bool eof; | |
1626 | * opaque data<>; | |
1627 | * }; | |
1628 | * | |
1629 | * struct READ3resfail { | |
1630 | * post_op_attr file_attributes; | |
1631 | * }; | |
1632 | * | |
1633 | * union READ3res switch (nfsstat3 status) { | |
1634 | * case NFS3_OK: | |
1635 | * READ3resok resok; | |
1636 | * default: | |
1637 | * READ3resfail resfail; | |
1638 | * }; | |
1639 | */ | |
1640 | static int decode_read3resok(struct xdr_stream *xdr, | |
1641 | struct nfs_readres *result) | |
1642 | { | |
1643 | u32 eof, count, ocount, recvd; | |
1644 | size_t hdrlen; | |
1645 | __be32 *p; | |
1646 | ||
1647 | p = xdr_inline_decode(xdr, 4 + 4 + 4); | |
1648 | if (unlikely(p == NULL)) | |
1649 | goto out_overflow; | |
1650 | count = be32_to_cpup(p++); | |
1651 | eof = be32_to_cpup(p++); | |
1652 | ocount = be32_to_cpup(p++); | |
1653 | if (unlikely(ocount != count)) | |
1654 | goto out_mismatch; | |
1655 | hdrlen = (u8 *)xdr->p - (u8 *)xdr->iov->iov_base; | |
1656 | recvd = xdr->buf->len - hdrlen; | |
1657 | if (unlikely(count > recvd)) | |
1658 | goto out_cheating; | |
1659 | ||
1660 | out: | |
1661 | xdr_read_pages(xdr, count); | |
1662 | result->eof = eof; | |
1663 | result->count = count; | |
1664 | return count; | |
1665 | out_mismatch: | |
1666 | dprintk("NFS: READ count doesn't match length of opaque: " | |
1667 | "count %u != ocount %u\n", count, ocount); | |
1668 | return -EIO; | |
1669 | out_cheating: | |
1670 | dprintk("NFS: server cheating in read result: " | |
1671 | "count %u > recvd %u\n", count, recvd); | |
1672 | count = recvd; | |
1673 | eof = 0; | |
1674 | goto out; | |
1675 | out_overflow: | |
1676 | print_overflow_msg(__func__, xdr); | |
1677 | return -EIO; | |
1678 | } | |
1679 | ||
1680 | static int nfs3_xdr_dec_read3res(struct rpc_rqst *req, __be32 *p, | |
1681 | struct nfs_readres *result) | |
1682 | { | |
1683 | struct xdr_stream xdr; | |
1684 | enum nfs_stat status; | |
1685 | int error; | |
1686 | ||
1687 | xdr_init_decode(&xdr, &req->rq_rcv_buf, p); | |
1688 | error = decode_nfsstat3(&xdr, &status); | |
1689 | if (unlikely(error)) | |
1690 | goto out; | |
1691 | error = decode_post_op_attr(&xdr, result->fattr); | |
1692 | if (unlikely(error)) | |
1693 | goto out; | |
1694 | if (status != NFS3_OK) | |
1695 | goto out_status; | |
1696 | error = decode_read3resok(&xdr, result); | |
1697 | out: | |
1698 | return error; | |
1699 | out_status: | |
1700 | return nfs_stat_to_errno(status); | |
1701 | } | |
1702 | ||
e4f93234 CL |
1703 | /* |
1704 | * 3.3.7 WRITE3res | |
1705 | * | |
1706 | * enum stable_how { | |
1707 | * UNSTABLE = 0, | |
1708 | * DATA_SYNC = 1, | |
1709 | * FILE_SYNC = 2 | |
1710 | * }; | |
1711 | * | |
1712 | * struct WRITE3resok { | |
1713 | * wcc_data file_wcc; | |
1714 | * count3 count; | |
1715 | * stable_how committed; | |
1716 | * writeverf3 verf; | |
1717 | * }; | |
1718 | * | |
1719 | * struct WRITE3resfail { | |
1720 | * wcc_data file_wcc; | |
1721 | * }; | |
1722 | * | |
1723 | * union WRITE3res switch (nfsstat3 status) { | |
1724 | * case NFS3_OK: | |
1725 | * WRITE3resok resok; | |
1726 | * default: | |
1727 | * WRITE3resfail resfail; | |
1728 | * }; | |
1729 | */ | |
1730 | static int decode_write3resok(struct xdr_stream *xdr, | |
1731 | struct nfs_writeres *result) | |
1732 | { | |
1733 | __be32 *p; | |
1734 | ||
1735 | p = xdr_inline_decode(xdr, 4 + 4 + NFS3_WRITEVERFSIZE); | |
1736 | if (unlikely(p == NULL)) | |
1737 | goto out_overflow; | |
1738 | result->count = be32_to_cpup(p++); | |
1739 | result->verf->committed = be32_to_cpup(p++); | |
1740 | if (unlikely(result->verf->committed > NFS_FILE_SYNC)) | |
1741 | goto out_badvalue; | |
1742 | memcpy(result->verf->verifier, p, NFS3_WRITEVERFSIZE); | |
1743 | return result->count; | |
1744 | out_badvalue: | |
1745 | dprintk("NFS: bad stable_how value: %u\n", result->verf->committed); | |
1746 | return -EIO; | |
1747 | out_overflow: | |
1748 | print_overflow_msg(__func__, xdr); | |
1749 | return -EIO; | |
1750 | } | |
1751 | ||
1752 | static int nfs3_xdr_dec_write3res(struct rpc_rqst *req, __be32 *p, | |
1753 | struct nfs_writeres *result) | |
1754 | { | |
1755 | struct xdr_stream xdr; | |
1756 | enum nfs_stat status; | |
1757 | int error; | |
1758 | ||
1759 | xdr_init_decode(&xdr, &req->rq_rcv_buf, p); | |
1760 | error = decode_nfsstat3(&xdr, &status); | |
1761 | if (unlikely(error)) | |
1762 | goto out; | |
1763 | error = decode_wcc_data(&xdr, result->fattr); | |
1764 | if (unlikely(error)) | |
1765 | goto out; | |
1766 | if (status != NFS3_OK) | |
1767 | goto out_status; | |
1768 | error = decode_write3resok(&xdr, result); | |
1769 | out: | |
1770 | return error; | |
1771 | out_status: | |
1772 | return nfs_stat_to_errno(status); | |
1773 | } | |
1774 | ||
e4f93234 CL |
1775 | /* |
1776 | * 3.3.8 CREATE3res | |
1777 | * | |
1778 | * struct CREATE3resok { | |
1779 | * post_op_fh3 obj; | |
1780 | * post_op_attr obj_attributes; | |
1781 | * wcc_data dir_wcc; | |
1782 | * }; | |
1783 | * | |
1784 | * struct CREATE3resfail { | |
1785 | * wcc_data dir_wcc; | |
1786 | * }; | |
1787 | * | |
1788 | * union CREATE3res switch (nfsstat3 status) { | |
1789 | * case NFS3_OK: | |
1790 | * CREATE3resok resok; | |
1791 | * default: | |
1792 | * CREATE3resfail resfail; | |
1793 | * }; | |
1794 | */ | |
1795 | static int decode_create3resok(struct xdr_stream *xdr, | |
1796 | struct nfs3_diropres *result) | |
1797 | { | |
1798 | int error; | |
1799 | ||
1800 | error = decode_post_op_fh3(xdr, result->fh); | |
1801 | if (unlikely(error)) | |
1802 | goto out; | |
1803 | error = decode_post_op_attr(xdr, result->fattr); | |
1804 | if (unlikely(error)) | |
1805 | goto out; | |
1806 | /* The server isn't required to return a file handle. | |
1807 | * If it didn't, force the client to perform a LOOKUP | |
1808 | * to determine the correct file handle and attribute | |
1809 | * values for the new object. */ | |
1810 | if (result->fh->size == 0) | |
1811 | result->fattr->valid = 0; | |
1812 | error = decode_wcc_data(xdr, result->dir_attr); | |
1813 | out: | |
1814 | return error; | |
1815 | } | |
1816 | ||
1817 | static int nfs3_xdr_dec_create3res(struct rpc_rqst *req, __be32 *p, | |
1818 | struct nfs3_diropres *result) | |
1819 | { | |
1820 | struct xdr_stream xdr; | |
1821 | enum nfs_stat status; | |
1822 | int error; | |
1823 | ||
1824 | xdr_init_decode(&xdr, &req->rq_rcv_buf, p); | |
1825 | error = decode_nfsstat3(&xdr, &status); | |
1826 | if (unlikely(error)) | |
1827 | goto out; | |
1828 | if (status != NFS3_OK) | |
1829 | goto out_default; | |
1830 | error = decode_create3resok(&xdr, result); | |
1831 | out: | |
1832 | return error; | |
1833 | out_default: | |
1834 | error = decode_wcc_data(&xdr, result->dir_attr); | |
1835 | if (unlikely(error)) | |
1836 | goto out; | |
1837 | return nfs_stat_to_errno(status); | |
1838 | } | |
1839 | ||
1840 | /* | |
1841 | * 3.3.12 REMOVE3res | |
1842 | * | |
1843 | * struct REMOVE3resok { | |
1844 | * wcc_data dir_wcc; | |
1845 | * }; | |
1846 | * | |
1847 | * struct REMOVE3resfail { | |
1848 | * wcc_data dir_wcc; | |
1849 | * }; | |
1850 | * | |
1851 | * union REMOVE3res switch (nfsstat3 status) { | |
1852 | * case NFS3_OK: | |
1853 | * REMOVE3resok resok; | |
1854 | * default: | |
1855 | * REMOVE3resfail resfail; | |
1856 | * }; | |
1857 | */ | |
1858 | static int nfs3_xdr_dec_remove3res(struct rpc_rqst *req, __be32 *p, | |
1859 | struct nfs_removeres *result) | |
1860 | { | |
1861 | struct xdr_stream xdr; | |
1862 | enum nfs_stat status; | |
1863 | int error; | |
1864 | ||
1865 | xdr_init_decode(&xdr, &req->rq_rcv_buf, p); | |
1866 | error = decode_nfsstat3(&xdr, &status); | |
1867 | if (unlikely(error)) | |
1868 | goto out; | |
1869 | error = decode_wcc_data(&xdr, result->dir_attr); | |
1870 | if (unlikely(error)) | |
1871 | goto out; | |
1872 | if (status != NFS3_OK) | |
1873 | goto out_status; | |
1874 | out: | |
1875 | return error; | |
1876 | out_status: | |
1877 | return nfs_stat_to_errno(status); | |
1878 | } | |
1879 | ||
e4f93234 CL |
1880 | /* |
1881 | * 3.3.14 RENAME3res | |
1882 | * | |
1883 | * struct RENAME3resok { | |
1884 | * wcc_data fromdir_wcc; | |
1885 | * wcc_data todir_wcc; | |
1886 | * }; | |
1887 | * | |
1888 | * struct RENAME3resfail { | |
1889 | * wcc_data fromdir_wcc; | |
1890 | * wcc_data todir_wcc; | |
1891 | * }; | |
1892 | * | |
1893 | * union RENAME3res switch (nfsstat3 status) { | |
1894 | * case NFS3_OK: | |
1895 | * RENAME3resok resok; | |
1896 | * default: | |
1897 | * RENAME3resfail resfail; | |
1898 | * }; | |
1899 | */ | |
1900 | static int nfs3_xdr_dec_rename3res(struct rpc_rqst *req, __be32 *p, | |
1901 | struct nfs_renameres *result) | |
1902 | { | |
1903 | struct xdr_stream xdr; | |
1904 | enum nfs_stat status; | |
1905 | int error; | |
1906 | ||
1907 | xdr_init_decode(&xdr, &req->rq_rcv_buf, p); | |
1908 | error = decode_nfsstat3(&xdr, &status); | |
1909 | if (unlikely(error)) | |
1910 | goto out; | |
1911 | error = decode_wcc_data(&xdr, result->old_fattr); | |
1912 | if (unlikely(error)) | |
1913 | goto out; | |
1914 | error = decode_wcc_data(&xdr, result->new_fattr); | |
1915 | if (unlikely(error)) | |
1916 | goto out; | |
1917 | if (status != NFS3_OK) | |
1918 | goto out_status; | |
1919 | out: | |
1920 | return error; | |
1921 | out_status: | |
1922 | return nfs_stat_to_errno(status); | |
1923 | } | |
1924 | ||
e4f93234 CL |
1925 | /* |
1926 | * 3.3.15 LINK3res | |
1927 | * | |
1928 | * struct LINK3resok { | |
1929 | * post_op_attr file_attributes; | |
1930 | * wcc_data linkdir_wcc; | |
1931 | * }; | |
1932 | * | |
1933 | * struct LINK3resfail { | |
1934 | * post_op_attr file_attributes; | |
1935 | * wcc_data linkdir_wcc; | |
1936 | * }; | |
1937 | * | |
1938 | * union LINK3res switch (nfsstat3 status) { | |
1939 | * case NFS3_OK: | |
1940 | * LINK3resok resok; | |
1941 | * default: | |
1942 | * LINK3resfail resfail; | |
1943 | * }; | |
1944 | */ | |
1945 | static int nfs3_xdr_dec_link3res(struct rpc_rqst *req, __be32 *p, | |
1946 | struct nfs3_linkres *result) | |
1947 | { | |
1948 | struct xdr_stream xdr; | |
1949 | enum nfs_stat status; | |
1950 | int error; | |
1951 | ||
1952 | xdr_init_decode(&xdr, &req->rq_rcv_buf, p); | |
1953 | error = decode_nfsstat3(&xdr, &status); | |
1954 | if (unlikely(error)) | |
1955 | goto out; | |
1956 | error = decode_post_op_attr(&xdr, result->fattr); | |
1957 | if (unlikely(error)) | |
1958 | goto out; | |
1959 | error = decode_wcc_data(&xdr, result->dir_attr); | |
1960 | if (unlikely(error)) | |
1961 | goto out; | |
1962 | if (status != NFS3_OK) | |
1963 | goto out_status; | |
1964 | out: | |
1965 | return error; | |
1966 | out_status: | |
1967 | return nfs_stat_to_errno(status); | |
1968 | } | |
1969 | ||
1970 | /** | |
1971 | * nfs3_decode_dirent - Decode a single NFSv3 directory entry stored in | |
1972 | * the local page cache | |
1973 | * @xdr: XDR stream where entry resides | |
1974 | * @entry: buffer to fill in with entry data | |
1975 | * @server: nfs_server data for this directory | |
1976 | * @plus: boolean indicating whether this should be a readdirplus entry | |
1977 | * | |
1978 | * Returns the position of the next item in the buffer, or an ERR_PTR. | |
1979 | * | |
1980 | * This function is not invoked during READDIR reply decoding, but | |
1981 | * rather whenever an application invokes the getdents(2) system call | |
1982 | * on a directory already in our cache. | |
1983 | * | |
1984 | * 3.3.16 entry3 | |
1985 | * | |
1986 | * struct entry3 { | |
1987 | * fileid3 fileid; | |
1988 | * filename3 name; | |
1989 | * cookie3 cookie; | |
1990 | * fhandle3 filehandle; | |
1991 | * post_op_attr3 attributes; | |
1992 | * entry3 *nextentry; | |
1993 | * }; | |
1994 | * | |
1995 | * 3.3.17 entryplus3 | |
1996 | * struct entryplus3 { | |
1997 | * fileid3 fileid; | |
1998 | * filename3 name; | |
1999 | * cookie3 cookie; | |
2000 | * post_op_attr name_attributes; | |
2001 | * post_op_fh3 name_handle; | |
2002 | * entryplus3 *nextentry; | |
2003 | * }; | |
2004 | */ | |
2005 | __be32 *nfs3_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, | |
2006 | struct nfs_server *server, int plus) | |
2007 | { | |
2008 | struct nfs_entry old = *entry; | |
2009 | __be32 *p; | |
2010 | int error; | |
2011 | ||
2012 | p = xdr_inline_decode(xdr, 4); | |
2013 | if (unlikely(p == NULL)) | |
2014 | goto out_overflow; | |
2015 | if (*p == xdr_zero) { | |
2016 | p = xdr_inline_decode(xdr, 4); | |
2017 | if (unlikely(p == NULL)) | |
2018 | goto out_overflow; | |
2019 | if (*p == xdr_zero) | |
2020 | return ERR_PTR(-EAGAIN); | |
2021 | entry->eof = 1; | |
2022 | return ERR_PTR(-EBADCOOKIE); | |
2023 | } | |
2024 | ||
2025 | error = decode_fileid3(xdr, &entry->ino); | |
2026 | if (unlikely(error)) | |
2027 | return ERR_PTR(error); | |
2028 | ||
2029 | error = decode_inline_filename3(xdr, &entry->name, &entry->len); | |
2030 | if (unlikely(error)) | |
2031 | return ERR_PTR(error); | |
2032 | ||
2033 | entry->prev_cookie = entry->cookie; | |
2034 | error = decode_cookie3(xdr, &entry->cookie); | |
2035 | if (unlikely(error)) | |
2036 | return ERR_PTR(error); | |
2037 | ||
2038 | entry->d_type = DT_UNKNOWN; | |
2039 | ||
2040 | if (plus) { | |
2041 | entry->fattr->valid = 0; | |
2042 | error = decode_post_op_attr(xdr, entry->fattr); | |
2043 | if (unlikely(error)) | |
2044 | return ERR_PTR(error); | |
2045 | if (entry->fattr->valid & NFS_ATTR_FATTR_V3) | |
2046 | entry->d_type = nfs_umode_to_dtype(entry->fattr->mode); | |
2047 | ||
2048 | /* In fact, a post_op_fh3: */ | |
2049 | p = xdr_inline_decode(xdr, 4); | |
2050 | if (unlikely(p == NULL)) | |
2051 | goto out_overflow; | |
2052 | if (*p != xdr_zero) { | |
2053 | error = decode_nfs_fh3(xdr, entry->fh); | |
2054 | if (unlikely(error)) { | |
2055 | if (error == -E2BIG) | |
2056 | goto out_truncated; | |
2057 | return ERR_PTR(error); | |
2058 | } | |
2059 | } else | |
2060 | zero_nfs_fh3(entry->fh); | |
2061 | } | |
2062 | ||
2063 | /* Peek at the next entry to see if we're at EOD */ | |
2064 | p = xdr_inline_peek(xdr, 4 + 4); | |
2065 | entry->eof = 0; | |
2066 | if (p != NULL) | |
2067 | entry->eof = (p[0] == xdr_zero) && (p[1] != xdr_zero); | |
2068 | return p; | |
2069 | ||
2070 | out_overflow: | |
2071 | print_overflow_msg(__func__, xdr); | |
2072 | return ERR_PTR(-EAGAIN); | |
2073 | out_truncated: | |
2074 | dprintk("NFS: directory entry contains invalid file handle\n"); | |
2075 | *entry = old; | |
2076 | return ERR_PTR(-EAGAIN); | |
2077 | } | |
2078 | ||
2079 | /* | |
2080 | * 3.3.16 READDIR3res | |
2081 | * | |
2082 | * struct dirlist3 { | |
2083 | * entry3 *entries; | |
2084 | * bool eof; | |
2085 | * }; | |
2086 | * | |
2087 | * struct READDIR3resok { | |
2088 | * post_op_attr dir_attributes; | |
2089 | * cookieverf3 cookieverf; | |
2090 | * dirlist3 reply; | |
2091 | * }; | |
2092 | * | |
2093 | * struct READDIR3resfail { | |
2094 | * post_op_attr dir_attributes; | |
2095 | * }; | |
2096 | * | |
2097 | * union READDIR3res switch (nfsstat3 status) { | |
2098 | * case NFS3_OK: | |
2099 | * READDIR3resok resok; | |
2100 | * default: | |
2101 | * READDIR3resfail resfail; | |
2102 | * }; | |
2103 | * | |
2104 | * Read the directory contents into the page cache, but otherwise | |
2105 | * don't touch them. The actual decoding is done by nfs3_decode_entry() | |
2106 | * during subsequent nfs_readdir() calls. | |
2107 | */ | |
2108 | static int decode_dirlist3(struct xdr_stream *xdr) | |
2109 | { | |
2110 | u32 recvd, pglen; | |
2111 | size_t hdrlen; | |
2112 | ||
2113 | pglen = xdr->buf->page_len; | |
2114 | hdrlen = (u8 *)xdr->p - (u8 *)xdr->iov->iov_base; | |
2115 | recvd = xdr->buf->len - hdrlen; | |
2116 | if (unlikely(pglen > recvd)) | |
2117 | goto out_cheating; | |
2118 | out: | |
2119 | xdr_read_pages(xdr, pglen); | |
2120 | return pglen; | |
2121 | out_cheating: | |
2122 | dprintk("NFS: server cheating in readdir result: " | |
2123 | "pglen %u > recvd %u\n", pglen, recvd); | |
2124 | pglen = recvd; | |
2125 | goto out; | |
2126 | } | |
2127 | ||
2128 | static int decode_readdir3resok(struct xdr_stream *xdr, | |
2129 | struct nfs3_readdirres *result) | |
2130 | { | |
2131 | int error; | |
2132 | ||
2133 | error = decode_post_op_attr(xdr, result->dir_attr); | |
2134 | if (unlikely(error)) | |
2135 | goto out; | |
2136 | /* XXX: do we need to check if result->verf != NULL ? */ | |
2137 | error = decode_cookieverf3(xdr, result->verf); | |
2138 | if (unlikely(error)) | |
2139 | goto out; | |
2140 | error = decode_dirlist3(xdr); | |
2141 | out: | |
2142 | return error; | |
2143 | } | |
2144 | ||
2145 | static int nfs3_xdr_dec_readdir3res(struct rpc_rqst *req, __be32 *p, | |
2146 | struct nfs3_readdirres *result) | |
2147 | { | |
2148 | struct xdr_stream xdr; | |
2149 | enum nfs_stat status; | |
2150 | int error; | |
2151 | ||
2152 | xdr_init_decode(&xdr, &req->rq_rcv_buf, p); | |
2153 | error = decode_nfsstat3(&xdr, &status); | |
2154 | if (unlikely(error)) | |
2155 | goto out; | |
2156 | if (status != NFS3_OK) | |
2157 | goto out_default; | |
2158 | error = decode_readdir3resok(&xdr, result); | |
2159 | out: | |
2160 | return error; | |
2161 | out_default: | |
2162 | error = decode_post_op_attr(&xdr, result->dir_attr); | |
2163 | if (unlikely(error)) | |
2164 | goto out; | |
2165 | return nfs_stat_to_errno(status); | |
2166 | } | |
2167 | ||
e4f93234 CL |
2168 | /* |
2169 | * 3.3.18 FSSTAT3res | |
2170 | * | |
2171 | * struct FSSTAT3resok { | |
2172 | * post_op_attr obj_attributes; | |
2173 | * size3 tbytes; | |
2174 | * size3 fbytes; | |
2175 | * size3 abytes; | |
2176 | * size3 tfiles; | |
2177 | * size3 ffiles; | |
2178 | * size3 afiles; | |
2179 | * uint32 invarsec; | |
2180 | * }; | |
2181 | * | |
2182 | * struct FSSTAT3resfail { | |
2183 | * post_op_attr obj_attributes; | |
2184 | * }; | |
2185 | * | |
2186 | * union FSSTAT3res switch (nfsstat3 status) { | |
2187 | * case NFS3_OK: | |
2188 | * FSSTAT3resok resok; | |
2189 | * default: | |
2190 | * FSSTAT3resfail resfail; | |
2191 | * }; | |
2192 | */ | |
2193 | static int decode_fsstat3resok(struct xdr_stream *xdr, | |
2194 | struct nfs_fsstat *result) | |
2195 | { | |
2196 | __be32 *p; | |
2197 | ||
2198 | p = xdr_inline_decode(xdr, 8 * 6 + 4); | |
2199 | if (unlikely(p == NULL)) | |
2200 | goto out_overflow; | |
2201 | p = xdr_decode_size3(p, &result->tbytes); | |
2202 | p = xdr_decode_size3(p, &result->fbytes); | |
2203 | p = xdr_decode_size3(p, &result->abytes); | |
2204 | p = xdr_decode_size3(p, &result->tfiles); | |
2205 | p = xdr_decode_size3(p, &result->ffiles); | |
2206 | xdr_decode_size3(p, &result->afiles); | |
2207 | /* ignore invarsec */ | |
2208 | return 0; | |
2209 | out_overflow: | |
2210 | print_overflow_msg(__func__, xdr); | |
2211 | return -EIO; | |
2212 | } | |
2213 | ||
2214 | static int nfs3_xdr_dec_fsstat3res(struct rpc_rqst *req, __be32 *p, | |
2215 | struct nfs_fsstat *result) | |
2216 | { | |
2217 | struct xdr_stream xdr; | |
2218 | enum nfs_stat status; | |
2219 | int error; | |
2220 | ||
2221 | xdr_init_decode(&xdr, &req->rq_rcv_buf, p); | |
2222 | error = decode_nfsstat3(&xdr, &status); | |
2223 | if (unlikely(error)) | |
2224 | goto out; | |
2225 | error = decode_post_op_attr(&xdr, result->fattr); | |
2226 | if (unlikely(error)) | |
2227 | goto out; | |
2228 | if (status != NFS3_OK) | |
2229 | goto out_status; | |
2230 | error = decode_fsstat3resok(&xdr, result); | |
2231 | out: | |
2232 | return error; | |
2233 | out_status: | |
2234 | return nfs_stat_to_errno(status); | |
2235 | } | |
2236 | ||
e4f93234 CL |
2237 | /* |
2238 | * 3.3.19 FSINFO3res | |
2239 | * | |
2240 | * struct FSINFO3resok { | |
2241 | * post_op_attr obj_attributes; | |
2242 | * uint32 rtmax; | |
2243 | * uint32 rtpref; | |
2244 | * uint32 rtmult; | |
2245 | * uint32 wtmax; | |
2246 | * uint32 wtpref; | |
2247 | * uint32 wtmult; | |
2248 | * uint32 dtpref; | |
2249 | * size3 maxfilesize; | |
2250 | * nfstime3 time_delta; | |
2251 | * uint32 properties; | |
2252 | * }; | |
2253 | * | |
2254 | * struct FSINFO3resfail { | |
2255 | * post_op_attr obj_attributes; | |
2256 | * }; | |
2257 | * | |
2258 | * union FSINFO3res switch (nfsstat3 status) { | |
2259 | * case NFS3_OK: | |
2260 | * FSINFO3resok resok; | |
2261 | * default: | |
2262 | * FSINFO3resfail resfail; | |
2263 | * }; | |
2264 | */ | |
2265 | static int decode_fsinfo3resok(struct xdr_stream *xdr, | |
2266 | struct nfs_fsinfo *result) | |
2267 | { | |
2268 | __be32 *p; | |
2269 | ||
2270 | p = xdr_inline_decode(xdr, 4 * 7 + 8 + 8 + 4); | |
2271 | if (unlikely(p == NULL)) | |
2272 | goto out_overflow; | |
2273 | result->rtmax = be32_to_cpup(p++); | |
2274 | result->rtpref = be32_to_cpup(p++); | |
2275 | result->rtmult = be32_to_cpup(p++); | |
2276 | result->wtmax = be32_to_cpup(p++); | |
2277 | result->wtpref = be32_to_cpup(p++); | |
2278 | result->wtmult = be32_to_cpup(p++); | |
2279 | result->dtpref = be32_to_cpup(p++); | |
2280 | p = xdr_decode_size3(p, &result->maxfilesize); | |
2281 | xdr_decode_time3(p, &result->time_delta); | |
2282 | ||
2283 | /* ignore properties */ | |
2284 | result->lease_time = 0; | |
2285 | return 0; | |
2286 | out_overflow: | |
2287 | print_overflow_msg(__func__, xdr); | |
2288 | return -EIO; | |
2289 | } | |
2290 | ||
2291 | static int nfs3_xdr_dec_fsinfo3res(struct rpc_rqst *req, __be32 *p, | |
2292 | struct nfs_fsinfo *result) | |
2293 | { | |
2294 | struct xdr_stream xdr; | |
2295 | enum nfs_stat status; | |
2296 | int error; | |
2297 | ||
2298 | xdr_init_decode(&xdr, &req->rq_rcv_buf, p); | |
2299 | error = decode_nfsstat3(&xdr, &status); | |
2300 | if (unlikely(error)) | |
2301 | goto out; | |
2302 | error = decode_post_op_attr(&xdr, result->fattr); | |
2303 | if (unlikely(error)) | |
2304 | goto out; | |
2305 | if (status != NFS3_OK) | |
2306 | goto out_status; | |
2307 | error = decode_fsinfo3resok(&xdr, result); | |
2308 | out: | |
2309 | return error; | |
2310 | out_status: | |
2311 | return nfs_stat_to_errno(status); | |
2312 | } | |
2313 | ||
e4f93234 CL |
2314 | /* |
2315 | * 3.3.20 PATHCONF3res | |
2316 | * | |
2317 | * struct PATHCONF3resok { | |
2318 | * post_op_attr obj_attributes; | |
2319 | * uint32 linkmax; | |
2320 | * uint32 name_max; | |
2321 | * bool no_trunc; | |
2322 | * bool chown_restricted; | |
2323 | * bool case_insensitive; | |
2324 | * bool case_preserving; | |
2325 | * }; | |
2326 | * | |
2327 | * struct PATHCONF3resfail { | |
2328 | * post_op_attr obj_attributes; | |
2329 | * }; | |
2330 | * | |
2331 | * union PATHCONF3res switch (nfsstat3 status) { | |
2332 | * case NFS3_OK: | |
2333 | * PATHCONF3resok resok; | |
2334 | * default: | |
2335 | * PATHCONF3resfail resfail; | |
2336 | * }; | |
2337 | */ | |
2338 | static int decode_pathconf3resok(struct xdr_stream *xdr, | |
2339 | struct nfs_pathconf *result) | |
2340 | { | |
2341 | __be32 *p; | |
2342 | ||
2343 | p = xdr_inline_decode(xdr, 4 * 6); | |
2344 | if (unlikely(p == NULL)) | |
2345 | goto out_overflow; | |
2346 | result->max_link = be32_to_cpup(p++); | |
2347 | result->max_namelen = be32_to_cpup(p); | |
2348 | /* ignore remaining fields */ | |
2349 | return 0; | |
2350 | out_overflow: | |
2351 | print_overflow_msg(__func__, xdr); | |
2352 | return -EIO; | |
2353 | } | |
2354 | ||
2355 | static int nfs3_xdr_dec_pathconf3res(struct rpc_rqst *req, __be32 *p, | |
2356 | struct nfs_pathconf *result) | |
2357 | { | |
2358 | struct xdr_stream xdr; | |
2359 | enum nfs_stat status; | |
2360 | int error; | |
2361 | ||
2362 | xdr_init_decode(&xdr, &req->rq_rcv_buf, p); | |
2363 | error = decode_nfsstat3(&xdr, &status); | |
2364 | if (unlikely(error)) | |
2365 | goto out; | |
2366 | error = decode_post_op_attr(&xdr, result->fattr); | |
2367 | if (unlikely(error)) | |
2368 | goto out; | |
2369 | if (status != NFS3_OK) | |
2370 | goto out_status; | |
2371 | error = decode_pathconf3resok(&xdr, result); | |
2372 | out: | |
2373 | return error; | |
2374 | out_status: | |
2375 | return nfs_stat_to_errno(status); | |
2376 | } | |
2377 | ||
e4f93234 CL |
2378 | /* |
2379 | * 3.3.21 COMMIT3res | |
2380 | * | |
2381 | * struct COMMIT3resok { | |
2382 | * wcc_data file_wcc; | |
2383 | * writeverf3 verf; | |
2384 | * }; | |
2385 | * | |
2386 | * struct COMMIT3resfail { | |
2387 | * wcc_data file_wcc; | |
2388 | * }; | |
2389 | * | |
2390 | * union COMMIT3res switch (nfsstat3 status) { | |
2391 | * case NFS3_OK: | |
2392 | * COMMIT3resok resok; | |
2393 | * default: | |
2394 | * COMMIT3resfail resfail; | |
2395 | * }; | |
2396 | */ | |
2397 | static int nfs3_xdr_dec_commit3res(struct rpc_rqst *req, __be32 *p, | |
2398 | struct nfs_writeres *result) | |
2399 | { | |
2400 | struct xdr_stream xdr; | |
2401 | enum nfs_stat status; | |
2402 | int error; | |
2403 | ||
2404 | xdr_init_decode(&xdr, &req->rq_rcv_buf, p); | |
2405 | error = decode_nfsstat3(&xdr, &status); | |
2406 | if (unlikely(error)) | |
2407 | goto out; | |
2408 | error = decode_wcc_data(&xdr, result->fattr); | |
2409 | if (unlikely(error)) | |
2410 | goto out; | |
2411 | if (status != NFS3_OK) | |
2412 | goto out_status; | |
2413 | error = decode_writeverf3(&xdr, result->verf->verifier); | |
2414 | out: | |
2415 | return error; | |
2416 | out_status: | |
2417 | return nfs_stat_to_errno(status); | |
2418 | } | |
2419 | ||
b7fa0554 | 2420 | #ifdef CONFIG_NFS_V3_ACL |
b7fa0554 | 2421 | |
e4f93234 CL |
2422 | static inline int decode_getacl3resok(struct xdr_stream *xdr, |
2423 | struct nfs3_getaclres *result) | |
2424 | { | |
2425 | struct posix_acl **acl; | |
2426 | unsigned int *aclcnt; | |
2427 | size_t hdrlen; | |
2428 | int error; | |
2429 | ||
2430 | error = decode_post_op_attr(xdr, result->fattr); | |
2431 | if (unlikely(error)) | |
2432 | goto out; | |
2433 | error = decode_uint32(xdr, &result->mask); | |
2434 | if (unlikely(error)) | |
2435 | goto out; | |
2436 | error = -EINVAL; | |
2437 | if (result->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT)) | |
2438 | goto out; | |
2439 | ||
2440 | hdrlen = (u8 *)xdr->p - (u8 *)xdr->iov->iov_base; | |
2441 | ||
2442 | acl = NULL; | |
2443 | if (result->mask & NFS_ACL) | |
2444 | acl = &result->acl_access; | |
2445 | aclcnt = NULL; | |
2446 | if (result->mask & NFS_ACLCNT) | |
2447 | aclcnt = &result->acl_access_count; | |
2448 | error = nfsacl_decode(xdr->buf, hdrlen, aclcnt, acl); | |
2449 | if (unlikely(error <= 0)) | |
2450 | goto out; | |
2451 | ||
2452 | acl = NULL; | |
2453 | if (result->mask & NFS_DFACL) | |
2454 | acl = &result->acl_default; | |
2455 | aclcnt = NULL; | |
2456 | if (result->mask & NFS_DFACLCNT) | |
2457 | aclcnt = &result->acl_default_count; | |
2458 | error = nfsacl_decode(xdr->buf, hdrlen + error, aclcnt, acl); | |
2459 | if (unlikely(error <= 0)) | |
2460 | return error; | |
2461 | error = 0; | |
2462 | out: | |
2463 | return error; | |
2464 | } | |
2465 | ||
2466 | static int nfs3_xdr_dec_getacl3res(struct rpc_rqst *req, __be32 *p, | |
2467 | struct nfs3_getaclres *result) | |
2468 | { | |
2469 | struct xdr_stream xdr; | |
2470 | enum nfs_stat status; | |
2471 | int error; | |
2472 | ||
2473 | xdr_init_decode(&xdr, &req->rq_rcv_buf, p); | |
2474 | error = decode_nfsstat3(&xdr, &status); | |
2475 | if (unlikely(error)) | |
2476 | goto out; | |
2477 | if (status != NFS3_OK) | |
2478 | goto out_default; | |
2479 | error = decode_getacl3resok(&xdr, result); | |
2480 | out: | |
2481 | return error; | |
2482 | out_default: | |
2483 | return nfs_stat_to_errno(status); | |
2484 | } | |
2485 | ||
e4f93234 CL |
2486 | static int nfs3_xdr_dec_setacl3res(struct rpc_rqst *req, __be32 *p, |
2487 | struct nfs_fattr *result) | |
2488 | { | |
2489 | struct xdr_stream xdr; | |
2490 | enum nfs_stat status; | |
2491 | int error; | |
2492 | ||
2493 | xdr_init_decode(&xdr, &req->rq_rcv_buf, p); | |
2494 | error = decode_nfsstat3(&xdr, &status); | |
2495 | if (unlikely(error)) | |
2496 | goto out; | |
2497 | if (status != NFS3_OK) | |
2498 | goto out_default; | |
2499 | error = decode_post_op_attr(&xdr, result); | |
2500 | out: | |
2501 | return error; | |
2502 | out_default: | |
2503 | return nfs_stat_to_errno(status); | |
2504 | } | |
2505 | ||
b7fa0554 AG |
2506 | #endif /* CONFIG_NFS_V3_ACL */ |
2507 | ||
1da177e4 LT |
2508 | #define PROC(proc, argtype, restype, timer) \ |
2509 | [NFS3PROC_##proc] = { \ | |
2510 | .p_proc = NFS3PROC_##proc, \ | |
ad96b5b5 | 2511 | .p_encode = (kxdrproc_t)nfs3_xdr_enc_##argtype##3args, \ |
f5fc3c50 | 2512 | .p_decode = (kxdrproc_t)nfs3_xdr_dec_##restype##3res, \ |
ad96b5b5 | 2513 | .p_arglen = NFS3_##argtype##args_sz, \ |
f5fc3c50 | 2514 | .p_replen = NFS3_##restype##res_sz, \ |
cc0175c1 CL |
2515 | .p_timer = timer, \ |
2516 | .p_statidx = NFS3PROC_##proc, \ | |
2517 | .p_name = #proc, \ | |
1da177e4 LT |
2518 | } |
2519 | ||
2520 | struct rpc_procinfo nfs3_procedures[] = { | |
f5fc3c50 CL |
2521 | PROC(GETATTR, getattr, getattr, 1), |
2522 | PROC(SETATTR, setattr, setattr, 0), | |
2523 | PROC(LOOKUP, lookup, lookup, 2), | |
2524 | PROC(ACCESS, access, access, 1), | |
2525 | PROC(READLINK, readlink, readlink, 3), | |
2526 | PROC(READ, read, read, 3), | |
2527 | PROC(WRITE, write, write, 4), | |
2528 | PROC(CREATE, create, create, 0), | |
2529 | PROC(MKDIR, mkdir, create, 0), | |
2530 | PROC(SYMLINK, symlink, create, 0), | |
2531 | PROC(MKNOD, mknod, create, 0), | |
2532 | PROC(REMOVE, remove, remove, 0), | |
2533 | PROC(RMDIR, lookup, setattr, 0), | |
2534 | PROC(RENAME, rename, rename, 0), | |
2535 | PROC(LINK, link, link, 0), | |
2536 | PROC(READDIR, readdir, readdir, 3), | |
2537 | PROC(READDIRPLUS, readdirplus, readdir, 3), | |
2538 | PROC(FSSTAT, getattr, fsstat, 0), | |
2539 | PROC(FSINFO, getattr, fsinfo, 0), | |
2540 | PROC(PATHCONF, getattr, pathconf, 0), | |
2541 | PROC(COMMIT, commit, commit, 5), | |
1da177e4 LT |
2542 | }; |
2543 | ||
2544 | struct rpc_version nfs_version3 = { | |
2545 | .number = 3, | |
e8c96f8c | 2546 | .nrprocs = ARRAY_SIZE(nfs3_procedures), |
1da177e4 LT |
2547 | .procs = nfs3_procedures |
2548 | }; | |
2549 | ||
b7fa0554 AG |
2550 | #ifdef CONFIG_NFS_V3_ACL |
2551 | static struct rpc_procinfo nfs3_acl_procedures[] = { | |
2552 | [ACLPROC3_GETACL] = { | |
2553 | .p_proc = ACLPROC3_GETACL, | |
ad96b5b5 | 2554 | .p_encode = (kxdrproc_t)nfs3_xdr_enc_getacl3args, |
f5fc3c50 | 2555 | .p_decode = (kxdrproc_t)nfs3_xdr_dec_getacl3res, |
2bea90d4 CL |
2556 | .p_arglen = ACL3_getaclargs_sz, |
2557 | .p_replen = ACL3_getaclres_sz, | |
b7fa0554 | 2558 | .p_timer = 1, |
cc0175c1 | 2559 | .p_name = "GETACL", |
b7fa0554 AG |
2560 | }, |
2561 | [ACLPROC3_SETACL] = { | |
2562 | .p_proc = ACLPROC3_SETACL, | |
ad96b5b5 | 2563 | .p_encode = (kxdrproc_t)nfs3_xdr_enc_setacl3args, |
f5fc3c50 | 2564 | .p_decode = (kxdrproc_t)nfs3_xdr_dec_setacl3res, |
2bea90d4 CL |
2565 | .p_arglen = ACL3_setaclargs_sz, |
2566 | .p_replen = ACL3_setaclres_sz, | |
b7fa0554 | 2567 | .p_timer = 0, |
cc0175c1 | 2568 | .p_name = "SETACL", |
b7fa0554 AG |
2569 | }, |
2570 | }; | |
2571 | ||
2572 | struct rpc_version nfsacl_version3 = { | |
2573 | .number = 3, | |
2574 | .nrprocs = sizeof(nfs3_acl_procedures)/ | |
2575 | sizeof(nfs3_acl_procedures[0]), | |
2576 | .procs = nfs3_acl_procedures, | |
2577 | }; | |
2578 | #endif /* CONFIG_NFS_V3_ACL */ |