Commit | Line | Data |
---|---|---|
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 | ||
5e7e5a0d BS |
89 | static int nfs3_stat_to_errno(enum nfs_stat); |
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 | ||
d9c407b1 CL |
105 | /* |
106 | * While encoding arguments, set up the reply buffer in advance to | |
107 | * receive reply data directly into the page cache. | |
108 | */ | |
109 | static void prepare_reply_buffer(struct rpc_rqst *req, struct page **pages, | |
110 | unsigned int base, unsigned int len, | |
111 | unsigned int bufsize) | |
112 | { | |
113 | struct rpc_auth *auth = req->rq_cred->cr_auth; | |
114 | unsigned int replen; | |
115 | ||
116 | replen = RPC_REPHDRSIZE + auth->au_rslack + bufsize; | |
117 | xdr_inline_pages(&req->rq_rcv_buf, replen << 2, pages, base, len); | |
118 | } | |
119 | ||
e4f93234 CL |
120 | /* |
121 | * Handle decode buffer overflows out-of-line. | |
122 | */ | |
123 | static void print_overflow_msg(const char *func, const struct xdr_stream *xdr) | |
124 | { | |
125 | dprintk("NFS: %s prematurely hit the end of our receive buffer. " | |
126 | "Remaining buffer length is %tu words.\n", | |
127 | func, xdr->end - xdr->p); | |
128 | } | |
129 | ||
d9c407b1 | 130 | |
d9c407b1 CL |
131 | /* |
132 | * Encode/decode NFSv3 basic data types | |
133 | * | |
134 | * Basic NFSv3 data types are defined in section 2.5 of RFC 1813: | |
135 | * "NFS Version 3 Protocol Specification". | |
136 | * | |
137 | * Not all basic data types have their own encoding and decoding | |
138 | * functions. For run-time efficiency, some data types are encoded | |
139 | * or decoded inline. | |
140 | */ | |
141 | ||
142 | static void encode_uint32(struct xdr_stream *xdr, u32 value) | |
143 | { | |
144 | __be32 *p = xdr_reserve_space(xdr, 4); | |
145 | *p = cpu_to_be32(value); | |
146 | } | |
147 | ||
e4f93234 CL |
148 | static int decode_uint32(struct xdr_stream *xdr, u32 *value) |
149 | { | |
150 | __be32 *p; | |
151 | ||
152 | p = xdr_inline_decode(xdr, 4); | |
153 | if (unlikely(p == NULL)) | |
154 | goto out_overflow; | |
155 | *value = be32_to_cpup(p); | |
156 | return 0; | |
157 | out_overflow: | |
158 | print_overflow_msg(__func__, xdr); | |
159 | return -EIO; | |
160 | } | |
161 | ||
162 | static int decode_uint64(struct xdr_stream *xdr, u64 *value) | |
163 | { | |
164 | __be32 *p; | |
165 | ||
166 | p = xdr_inline_decode(xdr, 8); | |
167 | if (unlikely(p == NULL)) | |
168 | goto out_overflow; | |
169 | xdr_decode_hyper(p, value); | |
170 | return 0; | |
171 | out_overflow: | |
172 | print_overflow_msg(__func__, xdr); | |
173 | return -EIO; | |
174 | } | |
175 | ||
176 | /* | |
177 | * fileid3 | |
178 | * | |
179 | * typedef uint64 fileid3; | |
180 | */ | |
f6048709 CL |
181 | static __be32 *xdr_decode_fileid3(__be32 *p, u64 *fileid) |
182 | { | |
183 | return xdr_decode_hyper(p, fileid); | |
184 | } | |
185 | ||
e4f93234 CL |
186 | static int decode_fileid3(struct xdr_stream *xdr, u64 *fileid) |
187 | { | |
188 | return decode_uint64(xdr, fileid); | |
189 | } | |
190 | ||
d9c407b1 CL |
191 | /* |
192 | * filename3 | |
193 | * | |
194 | * typedef string filename3<>; | |
195 | */ | |
196 | static void encode_filename3(struct xdr_stream *xdr, | |
197 | const char *name, u32 length) | |
198 | { | |
199 | __be32 *p; | |
200 | ||
201 | BUG_ON(length > NFS3_MAXNAMLEN); | |
202 | p = xdr_reserve_space(xdr, 4 + length); | |
203 | xdr_encode_opaque(p, name, length); | |
204 | } | |
205 | ||
e4f93234 CL |
206 | static int decode_inline_filename3(struct xdr_stream *xdr, |
207 | const char **name, u32 *length) | |
208 | { | |
209 | __be32 *p; | |
210 | u32 count; | |
211 | ||
212 | p = xdr_inline_decode(xdr, 4); | |
213 | if (unlikely(p == NULL)) | |
214 | goto out_overflow; | |
215 | count = be32_to_cpup(p); | |
216 | if (count > NFS3_MAXNAMLEN) | |
217 | goto out_nametoolong; | |
218 | p = xdr_inline_decode(xdr, count); | |
219 | if (unlikely(p == NULL)) | |
220 | goto out_overflow; | |
221 | *name = (const char *)p; | |
222 | *length = count; | |
223 | return 0; | |
224 | ||
225 | out_nametoolong: | |
226 | dprintk("NFS: returned filename too long: %u\n", count); | |
227 | return -ENAMETOOLONG; | |
228 | out_overflow: | |
229 | print_overflow_msg(__func__, xdr); | |
230 | return -EIO; | |
231 | } | |
232 | ||
d9c407b1 CL |
233 | /* |
234 | * nfspath3 | |
235 | * | |
236 | * typedef string nfspath3<>; | |
237 | */ | |
238 | static void encode_nfspath3(struct xdr_stream *xdr, struct page **pages, | |
239 | const u32 length) | |
240 | { | |
241 | BUG_ON(length > NFS3_MAXPATHLEN); | |
242 | encode_uint32(xdr, length); | |
243 | xdr_write_pages(xdr, pages, 0, length); | |
244 | } | |
245 | ||
e4f93234 CL |
246 | static int decode_nfspath3(struct xdr_stream *xdr) |
247 | { | |
248 | u32 recvd, count; | |
e4f93234 CL |
249 | __be32 *p; |
250 | ||
251 | p = xdr_inline_decode(xdr, 4); | |
252 | if (unlikely(p == NULL)) | |
253 | goto out_overflow; | |
254 | count = be32_to_cpup(p); | |
255 | if (unlikely(count >= xdr->buf->page_len || count > NFS3_MAXPATHLEN)) | |
256 | goto out_nametoolong; | |
64bd577e | 257 | recvd = xdr_read_pages(xdr, count); |
e4f93234 CL |
258 | if (unlikely(count > recvd)) |
259 | goto out_cheating; | |
e4f93234 CL |
260 | xdr_terminate_string(xdr->buf, count); |
261 | return 0; | |
262 | ||
263 | out_nametoolong: | |
264 | dprintk("NFS: returned pathname too long: %u\n", count); | |
265 | return -ENAMETOOLONG; | |
266 | out_cheating: | |
267 | dprintk("NFS: server cheating in pathname result: " | |
268 | "count %u > recvd %u\n", count, recvd); | |
269 | return -EIO; | |
270 | out_overflow: | |
271 | print_overflow_msg(__func__, xdr); | |
272 | return -EIO; | |
273 | } | |
274 | ||
d9c407b1 CL |
275 | /* |
276 | * cookie3 | |
277 | * | |
278 | * typedef uint64 cookie3 | |
279 | */ | |
280 | static __be32 *xdr_encode_cookie3(__be32 *p, u64 cookie) | |
281 | { | |
282 | return xdr_encode_hyper(p, cookie); | |
283 | } | |
284 | ||
e4f93234 CL |
285 | static int decode_cookie3(struct xdr_stream *xdr, u64 *cookie) |
286 | { | |
287 | return decode_uint64(xdr, cookie); | |
288 | } | |
289 | ||
d9c407b1 CL |
290 | /* |
291 | * cookieverf3 | |
292 | * | |
293 | * typedef opaque cookieverf3[NFS3_COOKIEVERFSIZE]; | |
294 | */ | |
295 | static __be32 *xdr_encode_cookieverf3(__be32 *p, const __be32 *verifier) | |
296 | { | |
297 | memcpy(p, verifier, NFS3_COOKIEVERFSIZE); | |
298 | return p + XDR_QUADLEN(NFS3_COOKIEVERFSIZE); | |
299 | } | |
300 | ||
e4f93234 CL |
301 | static int decode_cookieverf3(struct xdr_stream *xdr, __be32 *verifier) |
302 | { | |
303 | __be32 *p; | |
304 | ||
305 | p = xdr_inline_decode(xdr, NFS3_COOKIEVERFSIZE); | |
306 | if (unlikely(p == NULL)) | |
307 | goto out_overflow; | |
308 | memcpy(verifier, p, NFS3_COOKIEVERFSIZE); | |
309 | return 0; | |
310 | out_overflow: | |
311 | print_overflow_msg(__func__, xdr); | |
312 | return -EIO; | |
313 | } | |
314 | ||
d9c407b1 CL |
315 | /* |
316 | * createverf3 | |
317 | * | |
318 | * typedef opaque createverf3[NFS3_CREATEVERFSIZE]; | |
319 | */ | |
320 | static void encode_createverf3(struct xdr_stream *xdr, const __be32 *verifier) | |
321 | { | |
322 | __be32 *p; | |
323 | ||
324 | p = xdr_reserve_space(xdr, NFS3_CREATEVERFSIZE); | |
325 | memcpy(p, verifier, NFS3_CREATEVERFSIZE); | |
326 | } | |
327 | ||
2f2c63bc | 328 | static int decode_writeverf3(struct xdr_stream *xdr, struct nfs_write_verifier *verifier) |
e4f93234 CL |
329 | { |
330 | __be32 *p; | |
331 | ||
332 | p = xdr_inline_decode(xdr, NFS3_WRITEVERFSIZE); | |
333 | if (unlikely(p == NULL)) | |
334 | goto out_overflow; | |
2f2c63bc | 335 | memcpy(verifier->data, p, NFS3_WRITEVERFSIZE); |
e4f93234 CL |
336 | return 0; |
337 | out_overflow: | |
338 | print_overflow_msg(__func__, xdr); | |
339 | return -EIO; | |
340 | } | |
341 | ||
342 | /* | |
343 | * size3 | |
344 | * | |
345 | * typedef uint64 size3; | |
346 | */ | |
347 | static __be32 *xdr_decode_size3(__be32 *p, u64 *size) | |
348 | { | |
349 | return xdr_decode_hyper(p, size); | |
350 | } | |
351 | ||
352 | /* | |
353 | * nfsstat3 | |
354 | * | |
355 | * enum nfsstat3 { | |
356 | * NFS3_OK = 0, | |
357 | * ... | |
358 | * } | |
359 | */ | |
360 | #define NFS3_OK NFS_OK | |
361 | ||
362 | static int decode_nfsstat3(struct xdr_stream *xdr, enum nfs_stat *status) | |
363 | { | |
364 | __be32 *p; | |
365 | ||
366 | p = xdr_inline_decode(xdr, 4); | |
367 | if (unlikely(p == NULL)) | |
368 | goto out_overflow; | |
369 | *status = be32_to_cpup(p); | |
370 | return 0; | |
371 | out_overflow: | |
372 | print_overflow_msg(__func__, xdr); | |
373 | return -EIO; | |
374 | } | |
375 | ||
d9c407b1 CL |
376 | /* |
377 | * ftype3 | |
378 | * | |
379 | * enum ftype3 { | |
380 | * NF3REG = 1, | |
381 | * NF3DIR = 2, | |
382 | * NF3BLK = 3, | |
383 | * NF3CHR = 4, | |
384 | * NF3LNK = 5, | |
385 | * NF3SOCK = 6, | |
386 | * NF3FIFO = 7 | |
387 | * }; | |
388 | */ | |
389 | static void encode_ftype3(struct xdr_stream *xdr, const u32 type) | |
390 | { | |
391 | BUG_ON(type > NF3FIFO); | |
392 | encode_uint32(xdr, type); | |
393 | } | |
394 | ||
f6048709 CL |
395 | static __be32 *xdr_decode_ftype3(__be32 *p, umode_t *mode) |
396 | { | |
397 | u32 type; | |
398 | ||
399 | type = be32_to_cpup(p++); | |
400 | if (type > NF3FIFO) | |
401 | type = NF3NON; | |
402 | *mode = nfs_type2fmt[type]; | |
403 | return p; | |
404 | } | |
405 | ||
d9c407b1 CL |
406 | /* |
407 | * specdata3 | |
408 | * | |
409 | * struct specdata3 { | |
410 | * uint32 specdata1; | |
411 | * uint32 specdata2; | |
412 | * }; | |
413 | */ | |
414 | static void encode_specdata3(struct xdr_stream *xdr, const dev_t rdev) | |
415 | { | |
416 | __be32 *p; | |
417 | ||
418 | p = xdr_reserve_space(xdr, 8); | |
419 | *p++ = cpu_to_be32(MAJOR(rdev)); | |
420 | *p = cpu_to_be32(MINOR(rdev)); | |
421 | } | |
422 | ||
f6048709 CL |
423 | static __be32 *xdr_decode_specdata3(__be32 *p, dev_t *rdev) |
424 | { | |
425 | unsigned int major, minor; | |
426 | ||
427 | major = be32_to_cpup(p++); | |
428 | minor = be32_to_cpup(p++); | |
429 | *rdev = MKDEV(major, minor); | |
430 | if (MAJOR(*rdev) != major || MINOR(*rdev) != minor) | |
431 | *rdev = 0; | |
432 | return p; | |
433 | } | |
434 | ||
d9c407b1 CL |
435 | /* |
436 | * nfs_fh3 | |
437 | * | |
438 | * struct nfs_fh3 { | |
439 | * opaque data<NFS3_FHSIZE>; | |
440 | * }; | |
441 | */ | |
442 | static void encode_nfs_fh3(struct xdr_stream *xdr, const struct nfs_fh *fh) | |
443 | { | |
444 | __be32 *p; | |
445 | ||
446 | BUG_ON(fh->size > NFS3_FHSIZE); | |
447 | p = xdr_reserve_space(xdr, 4 + fh->size); | |
448 | xdr_encode_opaque(p, fh->data, fh->size); | |
449 | } | |
450 | ||
e4f93234 CL |
451 | static int decode_nfs_fh3(struct xdr_stream *xdr, struct nfs_fh *fh) |
452 | { | |
453 | u32 length; | |
454 | __be32 *p; | |
455 | ||
456 | p = xdr_inline_decode(xdr, 4); | |
457 | if (unlikely(p == NULL)) | |
458 | goto out_overflow; | |
459 | length = be32_to_cpup(p++); | |
460 | if (unlikely(length > NFS3_FHSIZE)) | |
461 | goto out_toobig; | |
462 | p = xdr_inline_decode(xdr, length); | |
463 | if (unlikely(p == NULL)) | |
464 | goto out_overflow; | |
465 | fh->size = length; | |
466 | memcpy(fh->data, p, length); | |
467 | return 0; | |
468 | out_toobig: | |
469 | dprintk("NFS: file handle size (%u) too big\n", length); | |
470 | return -E2BIG; | |
471 | out_overflow: | |
472 | print_overflow_msg(__func__, xdr); | |
473 | return -EIO; | |
474 | } | |
475 | ||
476 | static void zero_nfs_fh3(struct nfs_fh *fh) | |
477 | { | |
478 | memset(fh, 0, sizeof(*fh)); | |
479 | } | |
480 | ||
9d5a6434 CL |
481 | /* |
482 | * nfstime3 | |
483 | * | |
484 | * struct nfstime3 { | |
485 | * uint32 seconds; | |
486 | * uint32 nseconds; | |
487 | * }; | |
488 | */ | |
489 | static __be32 *xdr_encode_nfstime3(__be32 *p, const struct timespec *timep) | |
490 | { | |
491 | *p++ = cpu_to_be32(timep->tv_sec); | |
492 | *p++ = cpu_to_be32(timep->tv_nsec); | |
493 | return p; | |
494 | } | |
495 | ||
f6048709 CL |
496 | static __be32 *xdr_decode_nfstime3(__be32 *p, struct timespec *timep) |
497 | { | |
498 | timep->tv_sec = be32_to_cpup(p++); | |
499 | timep->tv_nsec = be32_to_cpup(p++); | |
500 | return p; | |
501 | } | |
502 | ||
d9c407b1 CL |
503 | /* |
504 | * sattr3 | |
505 | * | |
506 | * enum time_how { | |
507 | * DONT_CHANGE = 0, | |
508 | * SET_TO_SERVER_TIME = 1, | |
509 | * SET_TO_CLIENT_TIME = 2 | |
510 | * }; | |
511 | * | |
512 | * union set_mode3 switch (bool set_it) { | |
513 | * case TRUE: | |
514 | * mode3 mode; | |
515 | * default: | |
516 | * void; | |
517 | * }; | |
518 | * | |
519 | * union set_uid3 switch (bool set_it) { | |
520 | * case TRUE: | |
521 | * uid3 uid; | |
522 | * default: | |
523 | * void; | |
524 | * }; | |
525 | * | |
526 | * union set_gid3 switch (bool set_it) { | |
527 | * case TRUE: | |
528 | * gid3 gid; | |
529 | * default: | |
530 | * void; | |
531 | * }; | |
532 | * | |
533 | * union set_size3 switch (bool set_it) { | |
534 | * case TRUE: | |
535 | * size3 size; | |
536 | * default: | |
537 | * void; | |
538 | * }; | |
539 | * | |
540 | * union set_atime switch (time_how set_it) { | |
541 | * case SET_TO_CLIENT_TIME: | |
542 | * nfstime3 atime; | |
543 | * default: | |
544 | * void; | |
545 | * }; | |
546 | * | |
547 | * union set_mtime switch (time_how set_it) { | |
548 | * case SET_TO_CLIENT_TIME: | |
549 | * nfstime3 mtime; | |
550 | * default: | |
551 | * void; | |
552 | * }; | |
553 | * | |
554 | * struct sattr3 { | |
555 | * set_mode3 mode; | |
556 | * set_uid3 uid; | |
557 | * set_gid3 gid; | |
558 | * set_size3 size; | |
559 | * set_atime atime; | |
560 | * set_mtime mtime; | |
561 | * }; | |
562 | */ | |
563 | static void encode_sattr3(struct xdr_stream *xdr, const struct iattr *attr) | |
564 | { | |
565 | u32 nbytes; | |
566 | __be32 *p; | |
567 | ||
568 | /* | |
569 | * In order to make only a single xdr_reserve_space() call, | |
570 | * pre-compute the total number of bytes to be reserved. | |
571 | * Six boolean values, one for each set_foo field, are always | |
572 | * present in the encoded result, so start there. | |
573 | */ | |
574 | nbytes = 6 * 4; | |
575 | if (attr->ia_valid & ATTR_MODE) | |
576 | nbytes += 4; | |
577 | if (attr->ia_valid & ATTR_UID) | |
578 | nbytes += 4; | |
579 | if (attr->ia_valid & ATTR_GID) | |
580 | nbytes += 4; | |
581 | if (attr->ia_valid & ATTR_SIZE) | |
582 | nbytes += 8; | |
583 | if (attr->ia_valid & ATTR_ATIME_SET) | |
584 | nbytes += 8; | |
585 | if (attr->ia_valid & ATTR_MTIME_SET) | |
586 | nbytes += 8; | |
587 | p = xdr_reserve_space(xdr, nbytes); | |
588 | ||
9d5a6434 CL |
589 | if (attr->ia_valid & ATTR_MODE) { |
590 | *p++ = xdr_one; | |
591 | *p++ = cpu_to_be32(attr->ia_mode & S_IALLUGO); | |
592 | } else | |
593 | *p++ = xdr_zero; | |
594 | ||
595 | if (attr->ia_valid & ATTR_UID) { | |
596 | *p++ = xdr_one; | |
597 | *p++ = cpu_to_be32(attr->ia_uid); | |
598 | } else | |
599 | *p++ = xdr_zero; | |
600 | ||
601 | if (attr->ia_valid & ATTR_GID) { | |
602 | *p++ = xdr_one; | |
603 | *p++ = cpu_to_be32(attr->ia_gid); | |
604 | } else | |
605 | *p++ = xdr_zero; | |
606 | ||
607 | if (attr->ia_valid & ATTR_SIZE) { | |
608 | *p++ = xdr_one; | |
609 | p = xdr_encode_hyper(p, (u64)attr->ia_size); | |
610 | } else | |
611 | *p++ = xdr_zero; | |
612 | ||
613 | if (attr->ia_valid & ATTR_ATIME_SET) { | |
614 | *p++ = xdr_two; | |
615 | p = xdr_encode_nfstime3(p, &attr->ia_atime); | |
616 | } else if (attr->ia_valid & ATTR_ATIME) { | |
617 | *p++ = xdr_one; | |
618 | } else | |
619 | *p++ = xdr_zero; | |
620 | ||
621 | if (attr->ia_valid & ATTR_MTIME_SET) { | |
622 | *p++ = xdr_two; | |
623 | xdr_encode_nfstime3(p, &attr->ia_mtime); | |
624 | } else if (attr->ia_valid & ATTR_MTIME) { | |
625 | *p = xdr_one; | |
626 | } else | |
627 | *p = xdr_zero; | |
d9c407b1 CL |
628 | } |
629 | ||
e4f93234 CL |
630 | /* |
631 | * fattr3 | |
632 | * | |
633 | * struct fattr3 { | |
634 | * ftype3 type; | |
635 | * mode3 mode; | |
636 | * uint32 nlink; | |
637 | * uid3 uid; | |
638 | * gid3 gid; | |
639 | * size3 size; | |
640 | * size3 used; | |
641 | * specdata3 rdev; | |
642 | * uint64 fsid; | |
643 | * fileid3 fileid; | |
644 | * nfstime3 atime; | |
645 | * nfstime3 mtime; | |
646 | * nfstime3 ctime; | |
647 | * }; | |
648 | */ | |
649 | static int decode_fattr3(struct xdr_stream *xdr, struct nfs_fattr *fattr) | |
650 | { | |
f6048709 | 651 | umode_t fmode; |
e4f93234 CL |
652 | __be32 *p; |
653 | ||
654 | p = xdr_inline_decode(xdr, NFS3_fattr_sz << 2); | |
655 | if (unlikely(p == NULL)) | |
656 | goto out_overflow; | |
f6048709 CL |
657 | |
658 | p = xdr_decode_ftype3(p, &fmode); | |
659 | ||
660 | fattr->mode = (be32_to_cpup(p++) & ~S_IFMT) | fmode; | |
661 | fattr->nlink = be32_to_cpup(p++); | |
662 | fattr->uid = be32_to_cpup(p++); | |
663 | fattr->gid = be32_to_cpup(p++); | |
664 | ||
665 | p = xdr_decode_size3(p, &fattr->size); | |
666 | p = xdr_decode_size3(p, &fattr->du.nfs3.used); | |
667 | p = xdr_decode_specdata3(p, &fattr->rdev); | |
668 | ||
669 | p = xdr_decode_hyper(p, &fattr->fsid.major); | |
670 | fattr->fsid.minor = 0; | |
671 | ||
672 | p = xdr_decode_fileid3(p, &fattr->fileid); | |
673 | p = xdr_decode_nfstime3(p, &fattr->atime); | |
674 | p = xdr_decode_nfstime3(p, &fattr->mtime); | |
675 | xdr_decode_nfstime3(p, &fattr->ctime); | |
3a1556e8 | 676 | fattr->change_attr = nfs_timespec_to_change_attr(&fattr->ctime); |
f6048709 CL |
677 | |
678 | fattr->valid |= NFS_ATTR_FATTR_V3; | |
e4f93234 CL |
679 | return 0; |
680 | out_overflow: | |
681 | print_overflow_msg(__func__, xdr); | |
682 | return -EIO; | |
683 | } | |
684 | ||
685 | /* | |
686 | * post_op_attr | |
687 | * | |
688 | * union post_op_attr switch (bool attributes_follow) { | |
689 | * case TRUE: | |
690 | * fattr3 attributes; | |
691 | * case FALSE: | |
692 | * void; | |
693 | * }; | |
694 | */ | |
695 | static int decode_post_op_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr) | |
696 | { | |
697 | __be32 *p; | |
698 | ||
699 | p = xdr_inline_decode(xdr, 4); | |
700 | if (unlikely(p == NULL)) | |
701 | goto out_overflow; | |
702 | if (*p != xdr_zero) | |
703 | return decode_fattr3(xdr, fattr); | |
704 | return 0; | |
705 | out_overflow: | |
706 | print_overflow_msg(__func__, xdr); | |
707 | return -EIO; | |
708 | } | |
709 | ||
710 | /* | |
711 | * wcc_attr | |
712 | * struct wcc_attr { | |
713 | * size3 size; | |
714 | * nfstime3 mtime; | |
715 | * nfstime3 ctime; | |
716 | * }; | |
717 | */ | |
718 | static int decode_wcc_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr) | |
719 | { | |
720 | __be32 *p; | |
721 | ||
722 | p = xdr_inline_decode(xdr, NFS3_wcc_attr_sz << 2); | |
723 | if (unlikely(p == NULL)) | |
724 | goto out_overflow; | |
f6048709 CL |
725 | |
726 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE | |
3a1556e8 | 727 | | NFS_ATTR_FATTR_PRECHANGE |
f6048709 CL |
728 | | NFS_ATTR_FATTR_PREMTIME |
729 | | NFS_ATTR_FATTR_PRECTIME; | |
730 | ||
731 | p = xdr_decode_size3(p, &fattr->pre_size); | |
732 | p = xdr_decode_nfstime3(p, &fattr->pre_mtime); | |
733 | xdr_decode_nfstime3(p, &fattr->pre_ctime); | |
3a1556e8 | 734 | fattr->pre_change_attr = nfs_timespec_to_change_attr(&fattr->pre_ctime); |
f6048709 | 735 | |
e4f93234 CL |
736 | return 0; |
737 | out_overflow: | |
738 | print_overflow_msg(__func__, xdr); | |
739 | return -EIO; | |
740 | } | |
741 | ||
742 | /* | |
743 | * pre_op_attr | |
744 | * union pre_op_attr switch (bool attributes_follow) { | |
745 | * case TRUE: | |
746 | * wcc_attr attributes; | |
747 | * case FALSE: | |
748 | * void; | |
749 | * }; | |
750 | * | |
751 | * wcc_data | |
752 | * | |
753 | * struct wcc_data { | |
754 | * pre_op_attr before; | |
755 | * post_op_attr after; | |
756 | * }; | |
757 | */ | |
758 | static int decode_pre_op_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr) | |
759 | { | |
760 | __be32 *p; | |
761 | ||
762 | p = xdr_inline_decode(xdr, 4); | |
763 | if (unlikely(p == NULL)) | |
764 | goto out_overflow; | |
765 | if (*p != xdr_zero) | |
766 | return decode_wcc_attr(xdr, fattr); | |
767 | return 0; | |
768 | out_overflow: | |
769 | print_overflow_msg(__func__, xdr); | |
770 | return -EIO; | |
771 | } | |
772 | ||
773 | static int decode_wcc_data(struct xdr_stream *xdr, struct nfs_fattr *fattr) | |
774 | { | |
775 | int error; | |
776 | ||
777 | error = decode_pre_op_attr(xdr, fattr); | |
778 | if (unlikely(error)) | |
779 | goto out; | |
780 | error = decode_post_op_attr(xdr, fattr); | |
781 | out: | |
782 | return error; | |
783 | } | |
784 | ||
785 | /* | |
786 | * post_op_fh3 | |
787 | * | |
788 | * union post_op_fh3 switch (bool handle_follows) { | |
789 | * case TRUE: | |
790 | * nfs_fh3 handle; | |
791 | * case FALSE: | |
792 | * void; | |
793 | * }; | |
794 | */ | |
795 | static int decode_post_op_fh3(struct xdr_stream *xdr, struct nfs_fh *fh) | |
796 | { | |
797 | __be32 *p = xdr_inline_decode(xdr, 4); | |
798 | if (unlikely(p == NULL)) | |
799 | goto out_overflow; | |
800 | if (*p != xdr_zero) | |
801 | return decode_nfs_fh3(xdr, fh); | |
802 | zero_nfs_fh3(fh); | |
803 | return 0; | |
804 | out_overflow: | |
805 | print_overflow_msg(__func__, xdr); | |
806 | return -EIO; | |
807 | } | |
808 | ||
d9c407b1 CL |
809 | /* |
810 | * diropargs3 | |
811 | * | |
812 | * struct diropargs3 { | |
813 | * nfs_fh3 dir; | |
814 | * filename3 name; | |
815 | * }; | |
816 | */ | |
817 | static void encode_diropargs3(struct xdr_stream *xdr, const struct nfs_fh *fh, | |
818 | const char *name, u32 length) | |
819 | { | |
820 | encode_nfs_fh3(xdr, fh); | |
821 | encode_filename3(xdr, name, length); | |
822 | } | |
823 | ||
824 | ||
1da177e4 | 825 | /* |
499ff710 CL |
826 | * NFSv3 XDR encode functions |
827 | * | |
828 | * NFSv3 argument types are defined in section 3.3 of RFC 1813: | |
829 | * "NFS Version 3 Protocol Specification". | |
1da177e4 LT |
830 | */ |
831 | ||
d9c407b1 CL |
832 | /* |
833 | * 3.3.1 GETATTR3args | |
834 | * | |
835 | * struct GETATTR3args { | |
836 | * nfs_fh3 object; | |
837 | * }; | |
838 | */ | |
9f06c719 CL |
839 | static void nfs3_xdr_enc_getattr3args(struct rpc_rqst *req, |
840 | struct xdr_stream *xdr, | |
841 | const struct nfs_fh *fh) | |
d9c407b1 | 842 | { |
9f06c719 | 843 | encode_nfs_fh3(xdr, fh); |
d9c407b1 CL |
844 | } |
845 | ||
d9c407b1 CL |
846 | /* |
847 | * 3.3.2 SETATTR3args | |
848 | * | |
849 | * union sattrguard3 switch (bool check) { | |
850 | * case TRUE: | |
851 | * nfstime3 obj_ctime; | |
852 | * case FALSE: | |
853 | * void; | |
854 | * }; | |
855 | * | |
856 | * struct SETATTR3args { | |
857 | * nfs_fh3 object; | |
858 | * sattr3 new_attributes; | |
859 | * sattrguard3 guard; | |
860 | * }; | |
861 | */ | |
862 | static void encode_sattrguard3(struct xdr_stream *xdr, | |
863 | const struct nfs3_sattrargs *args) | |
864 | { | |
865 | __be32 *p; | |
866 | ||
867 | if (args->guard) { | |
868 | p = xdr_reserve_space(xdr, 4 + 8); | |
869 | *p++ = xdr_one; | |
9d5a6434 | 870 | xdr_encode_nfstime3(p, &args->guardtime); |
d9c407b1 CL |
871 | } else { |
872 | p = xdr_reserve_space(xdr, 4); | |
873 | *p = xdr_zero; | |
874 | } | |
875 | } | |
876 | ||
9f06c719 CL |
877 | static void nfs3_xdr_enc_setattr3args(struct rpc_rqst *req, |
878 | struct xdr_stream *xdr, | |
879 | const struct nfs3_sattrargs *args) | |
d9c407b1 | 880 | { |
9f06c719 CL |
881 | encode_nfs_fh3(xdr, args->fh); |
882 | encode_sattr3(xdr, args->sattr); | |
883 | encode_sattrguard3(xdr, args); | |
d9c407b1 CL |
884 | } |
885 | ||
d9c407b1 CL |
886 | /* |
887 | * 3.3.3 LOOKUP3args | |
888 | * | |
889 | * struct LOOKUP3args { | |
890 | * diropargs3 what; | |
891 | * }; | |
892 | */ | |
9f06c719 CL |
893 | static void nfs3_xdr_enc_lookup3args(struct rpc_rqst *req, |
894 | struct xdr_stream *xdr, | |
895 | const struct nfs3_diropargs *args) | |
d9c407b1 | 896 | { |
9f06c719 | 897 | encode_diropargs3(xdr, args->fh, args->name, args->len); |
d9c407b1 CL |
898 | } |
899 | ||
d9c407b1 CL |
900 | /* |
901 | * 3.3.4 ACCESS3args | |
902 | * | |
903 | * struct ACCESS3args { | |
904 | * nfs_fh3 object; | |
905 | * uint32 access; | |
906 | * }; | |
907 | */ | |
908 | static void encode_access3args(struct xdr_stream *xdr, | |
909 | const struct nfs3_accessargs *args) | |
910 | { | |
911 | encode_nfs_fh3(xdr, args->fh); | |
912 | encode_uint32(xdr, args->access); | |
913 | } | |
914 | ||
9f06c719 CL |
915 | static void nfs3_xdr_enc_access3args(struct rpc_rqst *req, |
916 | struct xdr_stream *xdr, | |
917 | const struct nfs3_accessargs *args) | |
d9c407b1 | 918 | { |
9f06c719 | 919 | encode_access3args(xdr, args); |
d9c407b1 CL |
920 | } |
921 | ||
922 | /* | |
923 | * 3.3.5 READLINK3args | |
924 | * | |
925 | * struct READLINK3args { | |
926 | * nfs_fh3 symlink; | |
927 | * }; | |
928 | */ | |
9f06c719 CL |
929 | static void nfs3_xdr_enc_readlink3args(struct rpc_rqst *req, |
930 | struct xdr_stream *xdr, | |
931 | const struct nfs3_readlinkargs *args) | |
d9c407b1 | 932 | { |
9f06c719 | 933 | encode_nfs_fh3(xdr, args->fh); |
d9c407b1 CL |
934 | prepare_reply_buffer(req, args->pages, args->pgbase, |
935 | args->pglen, NFS3_readlinkres_sz); | |
d9c407b1 CL |
936 | } |
937 | ||
d9c407b1 CL |
938 | /* |
939 | * 3.3.6 READ3args | |
940 | * | |
941 | * struct READ3args { | |
942 | * nfs_fh3 file; | |
943 | * offset3 offset; | |
944 | * count3 count; | |
945 | * }; | |
946 | */ | |
947 | static void encode_read3args(struct xdr_stream *xdr, | |
948 | const struct nfs_readargs *args) | |
949 | { | |
950 | __be32 *p; | |
951 | ||
952 | encode_nfs_fh3(xdr, args->fh); | |
953 | ||
954 | p = xdr_reserve_space(xdr, 8 + 4); | |
955 | p = xdr_encode_hyper(p, args->offset); | |
956 | *p = cpu_to_be32(args->count); | |
957 | } | |
958 | ||
9f06c719 CL |
959 | static void nfs3_xdr_enc_read3args(struct rpc_rqst *req, |
960 | struct xdr_stream *xdr, | |
961 | const struct nfs_readargs *args) | |
d9c407b1 | 962 | { |
9f06c719 | 963 | encode_read3args(xdr, args); |
d9c407b1 CL |
964 | prepare_reply_buffer(req, args->pages, args->pgbase, |
965 | args->count, NFS3_readres_sz); | |
966 | req->rq_rcv_buf.flags |= XDRBUF_READ; | |
d9c407b1 CL |
967 | } |
968 | ||
d9c407b1 CL |
969 | /* |
970 | * 3.3.7 WRITE3args | |
971 | * | |
972 | * enum stable_how { | |
973 | * UNSTABLE = 0, | |
974 | * DATA_SYNC = 1, | |
975 | * FILE_SYNC = 2 | |
976 | * }; | |
977 | * | |
978 | * struct WRITE3args { | |
979 | * nfs_fh3 file; | |
980 | * offset3 offset; | |
981 | * count3 count; | |
982 | * stable_how stable; | |
983 | * opaque data<>; | |
984 | * }; | |
985 | */ | |
986 | static void encode_write3args(struct xdr_stream *xdr, | |
987 | const struct nfs_writeargs *args) | |
988 | { | |
989 | __be32 *p; | |
990 | ||
991 | encode_nfs_fh3(xdr, args->fh); | |
992 | ||
993 | p = xdr_reserve_space(xdr, 8 + 4 + 4 + 4); | |
994 | p = xdr_encode_hyper(p, args->offset); | |
995 | *p++ = cpu_to_be32(args->count); | |
d9c407b1 | 996 | *p++ = cpu_to_be32(args->stable); |
d9c407b1 CL |
997 | *p = cpu_to_be32(args->count); |
998 | xdr_write_pages(xdr, args->pages, args->pgbase, args->count); | |
999 | } | |
1000 | ||
9f06c719 CL |
1001 | static void nfs3_xdr_enc_write3args(struct rpc_rqst *req, |
1002 | struct xdr_stream *xdr, | |
1003 | const struct nfs_writeargs *args) | |
d9c407b1 | 1004 | { |
9f06c719 CL |
1005 | encode_write3args(xdr, args); |
1006 | xdr->buf->flags |= XDRBUF_WRITE; | |
d9c407b1 CL |
1007 | } |
1008 | ||
d9c407b1 CL |
1009 | /* |
1010 | * 3.3.8 CREATE3args | |
1011 | * | |
1012 | * enum createmode3 { | |
1013 | * UNCHECKED = 0, | |
1014 | * GUARDED = 1, | |
1015 | * EXCLUSIVE = 2 | |
1016 | * }; | |
1017 | * | |
1018 | * union createhow3 switch (createmode3 mode) { | |
1019 | * case UNCHECKED: | |
1020 | * case GUARDED: | |
1021 | * sattr3 obj_attributes; | |
1022 | * case EXCLUSIVE: | |
1023 | * createverf3 verf; | |
1024 | * }; | |
1025 | * | |
1026 | * struct CREATE3args { | |
1027 | * diropargs3 where; | |
1028 | * createhow3 how; | |
1029 | * }; | |
1030 | */ | |
1031 | static void encode_createhow3(struct xdr_stream *xdr, | |
1032 | const struct nfs3_createargs *args) | |
1033 | { | |
1034 | encode_uint32(xdr, args->createmode); | |
1035 | switch (args->createmode) { | |
1036 | case NFS3_CREATE_UNCHECKED: | |
1037 | case NFS3_CREATE_GUARDED: | |
1038 | encode_sattr3(xdr, args->sattr); | |
1039 | break; | |
1040 | case NFS3_CREATE_EXCLUSIVE: | |
1041 | encode_createverf3(xdr, args->verifier); | |
1042 | break; | |
1043 | default: | |
1044 | BUG(); | |
1045 | } | |
1046 | } | |
1047 | ||
9f06c719 CL |
1048 | static void nfs3_xdr_enc_create3args(struct rpc_rqst *req, |
1049 | struct xdr_stream *xdr, | |
1050 | const struct nfs3_createargs *args) | |
d9c407b1 | 1051 | { |
9f06c719 CL |
1052 | encode_diropargs3(xdr, args->fh, args->name, args->len); |
1053 | encode_createhow3(xdr, args); | |
d9c407b1 CL |
1054 | } |
1055 | ||
d9c407b1 CL |
1056 | /* |
1057 | * 3.3.9 MKDIR3args | |
1058 | * | |
1059 | * struct MKDIR3args { | |
1060 | * diropargs3 where; | |
1061 | * sattr3 attributes; | |
1062 | * }; | |
1063 | */ | |
9f06c719 CL |
1064 | static void nfs3_xdr_enc_mkdir3args(struct rpc_rqst *req, |
1065 | struct xdr_stream *xdr, | |
1066 | const struct nfs3_mkdirargs *args) | |
d9c407b1 | 1067 | { |
9f06c719 CL |
1068 | encode_diropargs3(xdr, args->fh, args->name, args->len); |
1069 | encode_sattr3(xdr, args->sattr); | |
d9c407b1 CL |
1070 | } |
1071 | ||
d9c407b1 CL |
1072 | /* |
1073 | * 3.3.10 SYMLINK3args | |
1074 | * | |
1075 | * struct symlinkdata3 { | |
1076 | * sattr3 symlink_attributes; | |
1077 | * nfspath3 symlink_data; | |
1078 | * }; | |
1079 | * | |
1080 | * struct SYMLINK3args { | |
1081 | * diropargs3 where; | |
1082 | * symlinkdata3 symlink; | |
1083 | * }; | |
1084 | */ | |
1085 | static void encode_symlinkdata3(struct xdr_stream *xdr, | |
1086 | const struct nfs3_symlinkargs *args) | |
1087 | { | |
1088 | encode_sattr3(xdr, args->sattr); | |
1089 | encode_nfspath3(xdr, args->pages, args->pathlen); | |
1090 | } | |
1091 | ||
9f06c719 CL |
1092 | static void nfs3_xdr_enc_symlink3args(struct rpc_rqst *req, |
1093 | struct xdr_stream *xdr, | |
1094 | const struct nfs3_symlinkargs *args) | |
d9c407b1 | 1095 | { |
9f06c719 CL |
1096 | encode_diropargs3(xdr, args->fromfh, args->fromname, args->fromlen); |
1097 | encode_symlinkdata3(xdr, args); | |
d9c407b1 CL |
1098 | } |
1099 | ||
d9c407b1 CL |
1100 | /* |
1101 | * 3.3.11 MKNOD3args | |
1102 | * | |
1103 | * struct devicedata3 { | |
1104 | * sattr3 dev_attributes; | |
1105 | * specdata3 spec; | |
1106 | * }; | |
1107 | * | |
1108 | * union mknoddata3 switch (ftype3 type) { | |
1109 | * case NF3CHR: | |
1110 | * case NF3BLK: | |
1111 | * devicedata3 device; | |
1112 | * case NF3SOCK: | |
1113 | * case NF3FIFO: | |
1114 | * sattr3 pipe_attributes; | |
1115 | * default: | |
1116 | * void; | |
1117 | * }; | |
1118 | * | |
1119 | * struct MKNOD3args { | |
1120 | * diropargs3 where; | |
1121 | * mknoddata3 what; | |
1122 | * }; | |
1123 | */ | |
1124 | static void encode_devicedata3(struct xdr_stream *xdr, | |
1125 | const struct nfs3_mknodargs *args) | |
1126 | { | |
1127 | encode_sattr3(xdr, args->sattr); | |
1128 | encode_specdata3(xdr, args->rdev); | |
1129 | } | |
1130 | ||
1131 | static void encode_mknoddata3(struct xdr_stream *xdr, | |
1132 | const struct nfs3_mknodargs *args) | |
1133 | { | |
1134 | encode_ftype3(xdr, args->type); | |
1135 | switch (args->type) { | |
1136 | case NF3CHR: | |
1137 | case NF3BLK: | |
1138 | encode_devicedata3(xdr, args); | |
1139 | break; | |
1140 | case NF3SOCK: | |
1141 | case NF3FIFO: | |
1142 | encode_sattr3(xdr, args->sattr); | |
1143 | break; | |
1144 | case NF3REG: | |
1145 | case NF3DIR: | |
1146 | break; | |
1147 | default: | |
1148 | BUG(); | |
1149 | } | |
1150 | } | |
1151 | ||
9f06c719 CL |
1152 | static void nfs3_xdr_enc_mknod3args(struct rpc_rqst *req, |
1153 | struct xdr_stream *xdr, | |
1154 | const struct nfs3_mknodargs *args) | |
d9c407b1 | 1155 | { |
9f06c719 CL |
1156 | encode_diropargs3(xdr, args->fh, args->name, args->len); |
1157 | encode_mknoddata3(xdr, args); | |
d9c407b1 CL |
1158 | } |
1159 | ||
1160 | /* | |
1161 | * 3.3.12 REMOVE3args | |
1162 | * | |
1163 | * struct REMOVE3args { | |
1164 | * diropargs3 object; | |
1165 | * }; | |
1166 | */ | |
9f06c719 CL |
1167 | static void nfs3_xdr_enc_remove3args(struct rpc_rqst *req, |
1168 | struct xdr_stream *xdr, | |
1169 | const struct nfs_removeargs *args) | |
d9c407b1 | 1170 | { |
9f06c719 | 1171 | encode_diropargs3(xdr, args->fh, args->name.name, args->name.len); |
d9c407b1 CL |
1172 | } |
1173 | ||
d9c407b1 CL |
1174 | /* |
1175 | * 3.3.14 RENAME3args | |
1176 | * | |
1177 | * struct RENAME3args { | |
1178 | * diropargs3 from; | |
1179 | * diropargs3 to; | |
1180 | * }; | |
1181 | */ | |
9f06c719 CL |
1182 | static void nfs3_xdr_enc_rename3args(struct rpc_rqst *req, |
1183 | struct xdr_stream *xdr, | |
1184 | const struct nfs_renameargs *args) | |
d9c407b1 CL |
1185 | { |
1186 | const struct qstr *old = args->old_name; | |
1187 | const struct qstr *new = args->new_name; | |
d9c407b1 | 1188 | |
9f06c719 CL |
1189 | encode_diropargs3(xdr, args->old_dir, old->name, old->len); |
1190 | encode_diropargs3(xdr, args->new_dir, new->name, new->len); | |
d9c407b1 CL |
1191 | } |
1192 | ||
d9c407b1 CL |
1193 | /* |
1194 | * 3.3.15 LINK3args | |
1195 | * | |
1196 | * struct LINK3args { | |
1197 | * nfs_fh3 file; | |
1198 | * diropargs3 link; | |
1199 | * }; | |
1200 | */ | |
9f06c719 CL |
1201 | static void nfs3_xdr_enc_link3args(struct rpc_rqst *req, |
1202 | struct xdr_stream *xdr, | |
1203 | const struct nfs3_linkargs *args) | |
d9c407b1 | 1204 | { |
9f06c719 CL |
1205 | encode_nfs_fh3(xdr, args->fromfh); |
1206 | encode_diropargs3(xdr, args->tofh, args->toname, args->tolen); | |
d9c407b1 CL |
1207 | } |
1208 | ||
d9c407b1 CL |
1209 | /* |
1210 | * 3.3.16 READDIR3args | |
1211 | * | |
1212 | * struct READDIR3args { | |
1213 | * nfs_fh3 dir; | |
1214 | * cookie3 cookie; | |
1215 | * cookieverf3 cookieverf; | |
1216 | * count3 count; | |
1217 | * }; | |
1218 | */ | |
1219 | static void encode_readdir3args(struct xdr_stream *xdr, | |
1220 | const struct nfs3_readdirargs *args) | |
1221 | { | |
1222 | __be32 *p; | |
1223 | ||
1224 | encode_nfs_fh3(xdr, args->fh); | |
1225 | ||
1226 | p = xdr_reserve_space(xdr, 8 + NFS3_COOKIEVERFSIZE + 4); | |
1227 | p = xdr_encode_cookie3(p, args->cookie); | |
1228 | p = xdr_encode_cookieverf3(p, args->verf); | |
1229 | *p = cpu_to_be32(args->count); | |
1230 | } | |
1231 | ||
9f06c719 CL |
1232 | static void nfs3_xdr_enc_readdir3args(struct rpc_rqst *req, |
1233 | struct xdr_stream *xdr, | |
1234 | const struct nfs3_readdirargs *args) | |
d9c407b1 | 1235 | { |
9f06c719 | 1236 | encode_readdir3args(xdr, args); |
d9c407b1 CL |
1237 | prepare_reply_buffer(req, args->pages, 0, |
1238 | args->count, NFS3_readdirres_sz); | |
d9c407b1 CL |
1239 | } |
1240 | ||
1241 | /* | |
1242 | * 3.3.17 READDIRPLUS3args | |
1243 | * | |
1244 | * struct READDIRPLUS3args { | |
1245 | * nfs_fh3 dir; | |
1246 | * cookie3 cookie; | |
1247 | * cookieverf3 cookieverf; | |
1248 | * count3 dircount; | |
1249 | * count3 maxcount; | |
1250 | * }; | |
1251 | */ | |
1252 | static void encode_readdirplus3args(struct xdr_stream *xdr, | |
1253 | const struct nfs3_readdirargs *args) | |
1254 | { | |
1255 | __be32 *p; | |
1256 | ||
1257 | encode_nfs_fh3(xdr, args->fh); | |
1258 | ||
1259 | p = xdr_reserve_space(xdr, 8 + NFS3_COOKIEVERFSIZE + 4 + 4); | |
1260 | p = xdr_encode_cookie3(p, args->cookie); | |
1261 | p = xdr_encode_cookieverf3(p, args->verf); | |
1262 | ||
1263 | /* | |
1264 | * readdirplus: need dircount + buffer size. | |
1265 | * We just make sure we make dircount big enough | |
1266 | */ | |
1267 | *p++ = cpu_to_be32(args->count >> 3); | |
1268 | ||
1269 | *p = cpu_to_be32(args->count); | |
1270 | } | |
1271 | ||
9f06c719 CL |
1272 | static void nfs3_xdr_enc_readdirplus3args(struct rpc_rqst *req, |
1273 | struct xdr_stream *xdr, | |
1274 | const struct nfs3_readdirargs *args) | |
d9c407b1 | 1275 | { |
9f06c719 | 1276 | encode_readdirplus3args(xdr, args); |
d9c407b1 CL |
1277 | prepare_reply_buffer(req, args->pages, 0, |
1278 | args->count, NFS3_readdirres_sz); | |
d9c407b1 CL |
1279 | } |
1280 | ||
d9c407b1 CL |
1281 | /* |
1282 | * 3.3.21 COMMIT3args | |
1283 | * | |
1284 | * struct COMMIT3args { | |
1285 | * nfs_fh3 file; | |
1286 | * offset3 offset; | |
1287 | * count3 count; | |
1288 | * }; | |
1289 | */ | |
1290 | static void encode_commit3args(struct xdr_stream *xdr, | |
0b7c0153 | 1291 | const struct nfs_commitargs *args) |
d9c407b1 CL |
1292 | { |
1293 | __be32 *p; | |
1294 | ||
1295 | encode_nfs_fh3(xdr, args->fh); | |
1296 | ||
1297 | p = xdr_reserve_space(xdr, 8 + 4); | |
1298 | p = xdr_encode_hyper(p, args->offset); | |
1299 | *p = cpu_to_be32(args->count); | |
1300 | } | |
1301 | ||
9f06c719 CL |
1302 | static void nfs3_xdr_enc_commit3args(struct rpc_rqst *req, |
1303 | struct xdr_stream *xdr, | |
0b7c0153 | 1304 | const struct nfs_commitargs *args) |
d9c407b1 | 1305 | { |
9f06c719 | 1306 | encode_commit3args(xdr, args); |
d9c407b1 CL |
1307 | } |
1308 | ||
b7fa0554 | 1309 | #ifdef CONFIG_NFS_V3_ACL |
b7fa0554 | 1310 | |
9f06c719 CL |
1311 | static void nfs3_xdr_enc_getacl3args(struct rpc_rqst *req, |
1312 | struct xdr_stream *xdr, | |
1313 | const struct nfs3_getaclargs *args) | |
d9c407b1 | 1314 | { |
9f06c719 CL |
1315 | encode_nfs_fh3(xdr, args->fh); |
1316 | encode_uint32(xdr, args->mask); | |
d9c407b1 CL |
1317 | if (args->mask & (NFS_ACL | NFS_DFACL)) |
1318 | prepare_reply_buffer(req, args->pages, 0, | |
1319 | NFSACL_MAXPAGES << PAGE_SHIFT, | |
1320 | ACL3_getaclres_sz); | |
d9c407b1 CL |
1321 | } |
1322 | ||
9f06c719 CL |
1323 | static void nfs3_xdr_enc_setacl3args(struct rpc_rqst *req, |
1324 | struct xdr_stream *xdr, | |
1325 | const struct nfs3_setaclargs *args) | |
d9c407b1 | 1326 | { |
d9c407b1 CL |
1327 | unsigned int base; |
1328 | int error; | |
1329 | ||
9f06c719 CL |
1330 | encode_nfs_fh3(xdr, NFS_FH(args->inode)); |
1331 | encode_uint32(xdr, args->mask); | |
ee5dc773 CL |
1332 | |
1333 | base = req->rq_slen; | |
d9c407b1 | 1334 | if (args->npages != 0) |
9f06c719 | 1335 | xdr_write_pages(xdr, args->pages, 0, args->len); |
ee5dc773 CL |
1336 | else |
1337 | xdr_reserve_space(xdr, NFS_ACL_INLINE_BUFSIZE); | |
d9c407b1 | 1338 | |
9f06c719 | 1339 | error = nfsacl_encode(xdr->buf, base, args->inode, |
d9c407b1 CL |
1340 | (args->mask & NFS_ACL) ? |
1341 | args->acl_access : NULL, 1, 0); | |
1342 | BUG_ON(error < 0); | |
9f06c719 | 1343 | error = nfsacl_encode(xdr->buf, base + error, args->inode, |
d9c407b1 CL |
1344 | (args->mask & NFS_DFACL) ? |
1345 | args->acl_default : NULL, 1, | |
1346 | NFS_ACL_DEFAULT); | |
1347 | BUG_ON(error < 0); | |
d9c407b1 CL |
1348 | } |
1349 | ||
b7fa0554 AG |
1350 | #endif /* CONFIG_NFS_V3_ACL */ |
1351 | ||
1da177e4 | 1352 | /* |
b2cdd9c9 CL |
1353 | * NFSv3 XDR decode functions |
1354 | * | |
1355 | * NFSv3 result types are defined in section 3.3 of RFC 1813: | |
1356 | * "NFS Version 3 Protocol Specification". | |
1da177e4 | 1357 | */ |
1da177e4 LT |
1358 | |
1359 | /* | |
e4f93234 CL |
1360 | * 3.3.1 GETATTR3res |
1361 | * | |
1362 | * struct GETATTR3resok { | |
1363 | * fattr3 obj_attributes; | |
1364 | * }; | |
1365 | * | |
1366 | * union GETATTR3res switch (nfsstat3 status) { | |
1367 | * case NFS3_OK: | |
1368 | * GETATTR3resok resok; | |
1369 | * default: | |
1370 | * void; | |
1371 | * }; | |
1da177e4 | 1372 | */ |
bf269551 CL |
1373 | static int nfs3_xdr_dec_getattr3res(struct rpc_rqst *req, |
1374 | struct xdr_stream *xdr, | |
e4f93234 | 1375 | struct nfs_fattr *result) |
1da177e4 | 1376 | { |
e4f93234 CL |
1377 | enum nfs_stat status; |
1378 | int error; | |
1379 | ||
bf269551 | 1380 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1381 | if (unlikely(error)) |
1382 | goto out; | |
1383 | if (status != NFS3_OK) | |
1384 | goto out_default; | |
bf269551 | 1385 | error = decode_fattr3(xdr, result); |
e4f93234 CL |
1386 | out: |
1387 | return error; | |
1388 | out_default: | |
5e7e5a0d | 1389 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1390 | } |
1391 | ||
e4f93234 CL |
1392 | /* |
1393 | * 3.3.2 SETATTR3res | |
1394 | * | |
1395 | * struct SETATTR3resok { | |
1396 | * wcc_data obj_wcc; | |
1397 | * }; | |
1398 | * | |
1399 | * struct SETATTR3resfail { | |
1400 | * wcc_data obj_wcc; | |
1401 | * }; | |
1402 | * | |
1403 | * union SETATTR3res switch (nfsstat3 status) { | |
1404 | * case NFS3_OK: | |
1405 | * SETATTR3resok resok; | |
1406 | * default: | |
1407 | * SETATTR3resfail resfail; | |
1408 | * }; | |
1409 | */ | |
bf269551 CL |
1410 | static int nfs3_xdr_dec_setattr3res(struct rpc_rqst *req, |
1411 | struct xdr_stream *xdr, | |
e4f93234 CL |
1412 | struct nfs_fattr *result) |
1413 | { | |
e4f93234 CL |
1414 | enum nfs_stat status; |
1415 | int error; | |
1416 | ||
bf269551 | 1417 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1418 | if (unlikely(error)) |
1419 | goto out; | |
bf269551 | 1420 | error = decode_wcc_data(xdr, result); |
e4f93234 CL |
1421 | if (unlikely(error)) |
1422 | goto out; | |
1423 | if (status != NFS3_OK) | |
1424 | goto out_status; | |
1425 | out: | |
1426 | return error; | |
1427 | out_status: | |
5e7e5a0d | 1428 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1429 | } |
1430 | ||
e4f93234 CL |
1431 | /* |
1432 | * 3.3.3 LOOKUP3res | |
1433 | * | |
1434 | * struct LOOKUP3resok { | |
1435 | * nfs_fh3 object; | |
1436 | * post_op_attr obj_attributes; | |
1437 | * post_op_attr dir_attributes; | |
1438 | * }; | |
1439 | * | |
1440 | * struct LOOKUP3resfail { | |
1441 | * post_op_attr dir_attributes; | |
1442 | * }; | |
1443 | * | |
1444 | * union LOOKUP3res switch (nfsstat3 status) { | |
1445 | * case NFS3_OK: | |
1446 | * LOOKUP3resok resok; | |
1447 | * default: | |
1448 | * LOOKUP3resfail resfail; | |
1449 | * }; | |
1450 | */ | |
bf269551 CL |
1451 | static int nfs3_xdr_dec_lookup3res(struct rpc_rqst *req, |
1452 | struct xdr_stream *xdr, | |
e4f93234 CL |
1453 | struct nfs3_diropres *result) |
1454 | { | |
e4f93234 CL |
1455 | enum nfs_stat status; |
1456 | int error; | |
1457 | ||
bf269551 | 1458 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1459 | if (unlikely(error)) |
1460 | goto out; | |
1461 | if (status != NFS3_OK) | |
1462 | goto out_default; | |
bf269551 | 1463 | error = decode_nfs_fh3(xdr, result->fh); |
e4f93234 CL |
1464 | if (unlikely(error)) |
1465 | goto out; | |
bf269551 | 1466 | error = decode_post_op_attr(xdr, result->fattr); |
e4f93234 CL |
1467 | if (unlikely(error)) |
1468 | goto out; | |
bf269551 | 1469 | error = decode_post_op_attr(xdr, result->dir_attr); |
e4f93234 CL |
1470 | out: |
1471 | return error; | |
1472 | out_default: | |
bf269551 | 1473 | error = decode_post_op_attr(xdr, result->dir_attr); |
e4f93234 CL |
1474 | if (unlikely(error)) |
1475 | goto out; | |
5e7e5a0d | 1476 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1477 | } |
1478 | ||
e4f93234 CL |
1479 | /* |
1480 | * 3.3.4 ACCESS3res | |
1481 | * | |
1482 | * struct ACCESS3resok { | |
1483 | * post_op_attr obj_attributes; | |
1484 | * uint32 access; | |
1485 | * }; | |
1486 | * | |
1487 | * struct ACCESS3resfail { | |
1488 | * post_op_attr obj_attributes; | |
1489 | * }; | |
1490 | * | |
1491 | * union ACCESS3res switch (nfsstat3 status) { | |
1492 | * case NFS3_OK: | |
1493 | * ACCESS3resok resok; | |
1494 | * default: | |
1495 | * ACCESS3resfail resfail; | |
1496 | * }; | |
1497 | */ | |
bf269551 CL |
1498 | static int nfs3_xdr_dec_access3res(struct rpc_rqst *req, |
1499 | struct xdr_stream *xdr, | |
e4f93234 CL |
1500 | struct nfs3_accessres *result) |
1501 | { | |
e4f93234 CL |
1502 | enum nfs_stat status; |
1503 | int error; | |
1504 | ||
bf269551 | 1505 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1506 | if (unlikely(error)) |
1507 | goto out; | |
bf269551 | 1508 | error = decode_post_op_attr(xdr, result->fattr); |
e4f93234 CL |
1509 | if (unlikely(error)) |
1510 | goto out; | |
1511 | if (status != NFS3_OK) | |
1512 | goto out_default; | |
bf269551 | 1513 | error = decode_uint32(xdr, &result->access); |
e4f93234 CL |
1514 | out: |
1515 | return error; | |
1516 | out_default: | |
5e7e5a0d | 1517 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1518 | } |
1519 | ||
e4f93234 CL |
1520 | /* |
1521 | * 3.3.5 READLINK3res | |
1522 | * | |
1523 | * struct READLINK3resok { | |
1524 | * post_op_attr symlink_attributes; | |
1525 | * nfspath3 data; | |
1526 | * }; | |
1527 | * | |
1528 | * struct READLINK3resfail { | |
1529 | * post_op_attr symlink_attributes; | |
1530 | * }; | |
1531 | * | |
1532 | * union READLINK3res switch (nfsstat3 status) { | |
1533 | * case NFS3_OK: | |
1534 | * READLINK3resok resok; | |
1535 | * default: | |
1536 | * READLINK3resfail resfail; | |
1537 | * }; | |
1538 | */ | |
bf269551 CL |
1539 | static int nfs3_xdr_dec_readlink3res(struct rpc_rqst *req, |
1540 | struct xdr_stream *xdr, | |
e4f93234 CL |
1541 | struct nfs_fattr *result) |
1542 | { | |
e4f93234 CL |
1543 | enum nfs_stat status; |
1544 | int error; | |
1545 | ||
bf269551 | 1546 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1547 | if (unlikely(error)) |
1548 | goto out; | |
bf269551 | 1549 | error = decode_post_op_attr(xdr, result); |
e4f93234 CL |
1550 | if (unlikely(error)) |
1551 | goto out; | |
1552 | if (status != NFS3_OK) | |
1553 | goto out_default; | |
bf269551 | 1554 | error = decode_nfspath3(xdr); |
e4f93234 CL |
1555 | out: |
1556 | return error; | |
1557 | out_default: | |
5e7e5a0d | 1558 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1559 | } |
1560 | ||
e4f93234 CL |
1561 | /* |
1562 | * 3.3.6 READ3res | |
1563 | * | |
1564 | * struct READ3resok { | |
1565 | * post_op_attr file_attributes; | |
1566 | * count3 count; | |
1567 | * bool eof; | |
1568 | * opaque data<>; | |
1569 | * }; | |
1570 | * | |
1571 | * struct READ3resfail { | |
1572 | * post_op_attr file_attributes; | |
1573 | * }; | |
1574 | * | |
1575 | * union READ3res switch (nfsstat3 status) { | |
1576 | * case NFS3_OK: | |
1577 | * READ3resok resok; | |
1578 | * default: | |
1579 | * READ3resfail resfail; | |
1580 | * }; | |
1581 | */ | |
1582 | static int decode_read3resok(struct xdr_stream *xdr, | |
1583 | struct nfs_readres *result) | |
1584 | { | |
1585 | u32 eof, count, ocount, recvd; | |
e4f93234 CL |
1586 | __be32 *p; |
1587 | ||
1588 | p = xdr_inline_decode(xdr, 4 + 4 + 4); | |
1589 | if (unlikely(p == NULL)) | |
1590 | goto out_overflow; | |
1591 | count = be32_to_cpup(p++); | |
1592 | eof = be32_to_cpup(p++); | |
1593 | ocount = be32_to_cpup(p++); | |
1594 | if (unlikely(ocount != count)) | |
1595 | goto out_mismatch; | |
64bd577e | 1596 | recvd = xdr_read_pages(xdr, count); |
e4f93234 CL |
1597 | if (unlikely(count > recvd)) |
1598 | goto out_cheating; | |
e4f93234 | 1599 | out: |
e4f93234 CL |
1600 | result->eof = eof; |
1601 | result->count = count; | |
1602 | return count; | |
1603 | out_mismatch: | |
1604 | dprintk("NFS: READ count doesn't match length of opaque: " | |
1605 | "count %u != ocount %u\n", count, ocount); | |
1606 | return -EIO; | |
1607 | out_cheating: | |
1608 | dprintk("NFS: server cheating in read result: " | |
1609 | "count %u > recvd %u\n", count, recvd); | |
1610 | count = recvd; | |
1611 | eof = 0; | |
1612 | goto out; | |
1613 | out_overflow: | |
1614 | print_overflow_msg(__func__, xdr); | |
1615 | return -EIO; | |
1616 | } | |
1617 | ||
bf269551 | 1618 | static int nfs3_xdr_dec_read3res(struct rpc_rqst *req, struct xdr_stream *xdr, |
e4f93234 CL |
1619 | struct nfs_readres *result) |
1620 | { | |
e4f93234 CL |
1621 | enum nfs_stat status; |
1622 | int error; | |
1623 | ||
bf269551 | 1624 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1625 | if (unlikely(error)) |
1626 | goto out; | |
bf269551 | 1627 | error = decode_post_op_attr(xdr, result->fattr); |
e4f93234 CL |
1628 | if (unlikely(error)) |
1629 | goto out; | |
1630 | if (status != NFS3_OK) | |
1631 | goto out_status; | |
bf269551 | 1632 | error = decode_read3resok(xdr, result); |
e4f93234 CL |
1633 | out: |
1634 | return error; | |
1635 | out_status: | |
5e7e5a0d | 1636 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1637 | } |
1638 | ||
e4f93234 CL |
1639 | /* |
1640 | * 3.3.7 WRITE3res | |
1641 | * | |
1642 | * enum stable_how { | |
1643 | * UNSTABLE = 0, | |
1644 | * DATA_SYNC = 1, | |
1645 | * FILE_SYNC = 2 | |
1646 | * }; | |
1647 | * | |
1648 | * struct WRITE3resok { | |
1649 | * wcc_data file_wcc; | |
1650 | * count3 count; | |
1651 | * stable_how committed; | |
1652 | * writeverf3 verf; | |
1653 | * }; | |
1654 | * | |
1655 | * struct WRITE3resfail { | |
1656 | * wcc_data file_wcc; | |
1657 | * }; | |
1658 | * | |
1659 | * union WRITE3res switch (nfsstat3 status) { | |
1660 | * case NFS3_OK: | |
1661 | * WRITE3resok resok; | |
1662 | * default: | |
1663 | * WRITE3resfail resfail; | |
1664 | * }; | |
1665 | */ | |
1666 | static int decode_write3resok(struct xdr_stream *xdr, | |
1667 | struct nfs_writeres *result) | |
1668 | { | |
1669 | __be32 *p; | |
1670 | ||
2f2c63bc | 1671 | p = xdr_inline_decode(xdr, 4 + 4); |
e4f93234 CL |
1672 | if (unlikely(p == NULL)) |
1673 | goto out_overflow; | |
1674 | result->count = be32_to_cpup(p++); | |
1675 | result->verf->committed = be32_to_cpup(p++); | |
1676 | if (unlikely(result->verf->committed > NFS_FILE_SYNC)) | |
1677 | goto out_badvalue; | |
2f2c63bc TM |
1678 | if (decode_writeverf3(xdr, &result->verf->verifier)) |
1679 | goto out_eio; | |
e4f93234 CL |
1680 | return result->count; |
1681 | out_badvalue: | |
1682 | dprintk("NFS: bad stable_how value: %u\n", result->verf->committed); | |
1683 | return -EIO; | |
1684 | out_overflow: | |
1685 | print_overflow_msg(__func__, xdr); | |
2f2c63bc | 1686 | out_eio: |
e4f93234 CL |
1687 | return -EIO; |
1688 | } | |
1689 | ||
bf269551 | 1690 | static int nfs3_xdr_dec_write3res(struct rpc_rqst *req, struct xdr_stream *xdr, |
e4f93234 CL |
1691 | struct nfs_writeres *result) |
1692 | { | |
e4f93234 CL |
1693 | enum nfs_stat status; |
1694 | int error; | |
1695 | ||
bf269551 | 1696 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1697 | if (unlikely(error)) |
1698 | goto out; | |
bf269551 | 1699 | error = decode_wcc_data(xdr, result->fattr); |
e4f93234 CL |
1700 | if (unlikely(error)) |
1701 | goto out; | |
1702 | if (status != NFS3_OK) | |
1703 | goto out_status; | |
bf269551 | 1704 | error = decode_write3resok(xdr, result); |
e4f93234 CL |
1705 | out: |
1706 | return error; | |
1707 | out_status: | |
5e7e5a0d | 1708 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1709 | } |
1710 | ||
e4f93234 CL |
1711 | /* |
1712 | * 3.3.8 CREATE3res | |
1713 | * | |
1714 | * struct CREATE3resok { | |
1715 | * post_op_fh3 obj; | |
1716 | * post_op_attr obj_attributes; | |
1717 | * wcc_data dir_wcc; | |
1718 | * }; | |
1719 | * | |
1720 | * struct CREATE3resfail { | |
1721 | * wcc_data dir_wcc; | |
1722 | * }; | |
1723 | * | |
1724 | * union CREATE3res switch (nfsstat3 status) { | |
1725 | * case NFS3_OK: | |
1726 | * CREATE3resok resok; | |
1727 | * default: | |
1728 | * CREATE3resfail resfail; | |
1729 | * }; | |
1730 | */ | |
1731 | static int decode_create3resok(struct xdr_stream *xdr, | |
1732 | struct nfs3_diropres *result) | |
1733 | { | |
1734 | int error; | |
1735 | ||
1736 | error = decode_post_op_fh3(xdr, result->fh); | |
1737 | if (unlikely(error)) | |
1738 | goto out; | |
1739 | error = decode_post_op_attr(xdr, result->fattr); | |
1740 | if (unlikely(error)) | |
1741 | goto out; | |
1742 | /* The server isn't required to return a file handle. | |
1743 | * If it didn't, force the client to perform a LOOKUP | |
1744 | * to determine the correct file handle and attribute | |
1745 | * values for the new object. */ | |
1746 | if (result->fh->size == 0) | |
1747 | result->fattr->valid = 0; | |
1748 | error = decode_wcc_data(xdr, result->dir_attr); | |
1749 | out: | |
1750 | return error; | |
1751 | } | |
1752 | ||
bf269551 CL |
1753 | static int nfs3_xdr_dec_create3res(struct rpc_rqst *req, |
1754 | struct xdr_stream *xdr, | |
e4f93234 CL |
1755 | struct nfs3_diropres *result) |
1756 | { | |
e4f93234 CL |
1757 | enum nfs_stat status; |
1758 | int error; | |
1759 | ||
bf269551 | 1760 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1761 | if (unlikely(error)) |
1762 | goto out; | |
1763 | if (status != NFS3_OK) | |
1764 | goto out_default; | |
bf269551 | 1765 | error = decode_create3resok(xdr, result); |
e4f93234 CL |
1766 | out: |
1767 | return error; | |
1768 | out_default: | |
bf269551 | 1769 | error = decode_wcc_data(xdr, result->dir_attr); |
e4f93234 CL |
1770 | if (unlikely(error)) |
1771 | goto out; | |
5e7e5a0d | 1772 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1773 | } |
1774 | ||
1775 | /* | |
1776 | * 3.3.12 REMOVE3res | |
1777 | * | |
1778 | * struct REMOVE3resok { | |
1779 | * wcc_data dir_wcc; | |
1780 | * }; | |
1781 | * | |
1782 | * struct REMOVE3resfail { | |
1783 | * wcc_data dir_wcc; | |
1784 | * }; | |
1785 | * | |
1786 | * union REMOVE3res switch (nfsstat3 status) { | |
1787 | * case NFS3_OK: | |
1788 | * REMOVE3resok resok; | |
1789 | * default: | |
1790 | * REMOVE3resfail resfail; | |
1791 | * }; | |
1792 | */ | |
bf269551 CL |
1793 | static int nfs3_xdr_dec_remove3res(struct rpc_rqst *req, |
1794 | struct xdr_stream *xdr, | |
e4f93234 CL |
1795 | struct nfs_removeres *result) |
1796 | { | |
e4f93234 CL |
1797 | enum nfs_stat status; |
1798 | int error; | |
1799 | ||
bf269551 | 1800 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1801 | if (unlikely(error)) |
1802 | goto out; | |
bf269551 | 1803 | error = decode_wcc_data(xdr, result->dir_attr); |
e4f93234 CL |
1804 | if (unlikely(error)) |
1805 | goto out; | |
1806 | if (status != NFS3_OK) | |
1807 | goto out_status; | |
1808 | out: | |
1809 | return error; | |
1810 | out_status: | |
5e7e5a0d | 1811 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1812 | } |
1813 | ||
e4f93234 CL |
1814 | /* |
1815 | * 3.3.14 RENAME3res | |
1816 | * | |
1817 | * struct RENAME3resok { | |
1818 | * wcc_data fromdir_wcc; | |
1819 | * wcc_data todir_wcc; | |
1820 | * }; | |
1821 | * | |
1822 | * struct RENAME3resfail { | |
1823 | * wcc_data fromdir_wcc; | |
1824 | * wcc_data todir_wcc; | |
1825 | * }; | |
1826 | * | |
1827 | * union RENAME3res switch (nfsstat3 status) { | |
1828 | * case NFS3_OK: | |
1829 | * RENAME3resok resok; | |
1830 | * default: | |
1831 | * RENAME3resfail resfail; | |
1832 | * }; | |
1833 | */ | |
bf269551 CL |
1834 | static int nfs3_xdr_dec_rename3res(struct rpc_rqst *req, |
1835 | struct xdr_stream *xdr, | |
e4f93234 CL |
1836 | struct nfs_renameres *result) |
1837 | { | |
e4f93234 CL |
1838 | enum nfs_stat status; |
1839 | int error; | |
1840 | ||
bf269551 | 1841 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1842 | if (unlikely(error)) |
1843 | goto out; | |
bf269551 | 1844 | error = decode_wcc_data(xdr, result->old_fattr); |
e4f93234 CL |
1845 | if (unlikely(error)) |
1846 | goto out; | |
bf269551 | 1847 | error = decode_wcc_data(xdr, result->new_fattr); |
e4f93234 CL |
1848 | if (unlikely(error)) |
1849 | goto out; | |
1850 | if (status != NFS3_OK) | |
1851 | goto out_status; | |
1852 | out: | |
1853 | return error; | |
1854 | out_status: | |
5e7e5a0d | 1855 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1856 | } |
1857 | ||
e4f93234 CL |
1858 | /* |
1859 | * 3.3.15 LINK3res | |
1860 | * | |
1861 | * struct LINK3resok { | |
1862 | * post_op_attr file_attributes; | |
1863 | * wcc_data linkdir_wcc; | |
1864 | * }; | |
1865 | * | |
1866 | * struct LINK3resfail { | |
1867 | * post_op_attr file_attributes; | |
1868 | * wcc_data linkdir_wcc; | |
1869 | * }; | |
1870 | * | |
1871 | * union LINK3res switch (nfsstat3 status) { | |
1872 | * case NFS3_OK: | |
1873 | * LINK3resok resok; | |
1874 | * default: | |
1875 | * LINK3resfail resfail; | |
1876 | * }; | |
1877 | */ | |
bf269551 | 1878 | static int nfs3_xdr_dec_link3res(struct rpc_rqst *req, struct xdr_stream *xdr, |
e4f93234 CL |
1879 | struct nfs3_linkres *result) |
1880 | { | |
e4f93234 CL |
1881 | enum nfs_stat status; |
1882 | int error; | |
1883 | ||
bf269551 | 1884 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1885 | if (unlikely(error)) |
1886 | goto out; | |
bf269551 | 1887 | error = decode_post_op_attr(xdr, result->fattr); |
e4f93234 CL |
1888 | if (unlikely(error)) |
1889 | goto out; | |
bf269551 | 1890 | error = decode_wcc_data(xdr, result->dir_attr); |
e4f93234 CL |
1891 | if (unlikely(error)) |
1892 | goto out; | |
1893 | if (status != NFS3_OK) | |
1894 | goto out_status; | |
1895 | out: | |
1896 | return error; | |
1897 | out_status: | |
5e7e5a0d | 1898 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1899 | } |
1900 | ||
1901 | /** | |
1902 | * nfs3_decode_dirent - Decode a single NFSv3 directory entry stored in | |
1903 | * the local page cache | |
1904 | * @xdr: XDR stream where entry resides | |
1905 | * @entry: buffer to fill in with entry data | |
e4f93234 CL |
1906 | * @plus: boolean indicating whether this should be a readdirplus entry |
1907 | * | |
573c4e1e CL |
1908 | * Returns zero if successful, otherwise a negative errno value is |
1909 | * returned. | |
e4f93234 CL |
1910 | * |
1911 | * This function is not invoked during READDIR reply decoding, but | |
1912 | * rather whenever an application invokes the getdents(2) system call | |
1913 | * on a directory already in our cache. | |
1914 | * | |
1915 | * 3.3.16 entry3 | |
1916 | * | |
1917 | * struct entry3 { | |
1918 | * fileid3 fileid; | |
1919 | * filename3 name; | |
1920 | * cookie3 cookie; | |
1921 | * fhandle3 filehandle; | |
1922 | * post_op_attr3 attributes; | |
1923 | * entry3 *nextentry; | |
1924 | * }; | |
1925 | * | |
1926 | * 3.3.17 entryplus3 | |
1927 | * struct entryplus3 { | |
1928 | * fileid3 fileid; | |
1929 | * filename3 name; | |
1930 | * cookie3 cookie; | |
1931 | * post_op_attr name_attributes; | |
1932 | * post_op_fh3 name_handle; | |
1933 | * entryplus3 *nextentry; | |
1934 | * }; | |
1935 | */ | |
573c4e1e CL |
1936 | int nfs3_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, |
1937 | int plus) | |
e4f93234 CL |
1938 | { |
1939 | struct nfs_entry old = *entry; | |
1940 | __be32 *p; | |
1941 | int error; | |
1942 | ||
1943 | p = xdr_inline_decode(xdr, 4); | |
1944 | if (unlikely(p == NULL)) | |
1945 | goto out_overflow; | |
1946 | if (*p == xdr_zero) { | |
1947 | p = xdr_inline_decode(xdr, 4); | |
1948 | if (unlikely(p == NULL)) | |
1949 | goto out_overflow; | |
1950 | if (*p == xdr_zero) | |
573c4e1e | 1951 | return -EAGAIN; |
e4f93234 | 1952 | entry->eof = 1; |
573c4e1e | 1953 | return -EBADCOOKIE; |
e4f93234 CL |
1954 | } |
1955 | ||
1956 | error = decode_fileid3(xdr, &entry->ino); | |
1957 | if (unlikely(error)) | |
573c4e1e | 1958 | return error; |
e4f93234 CL |
1959 | |
1960 | error = decode_inline_filename3(xdr, &entry->name, &entry->len); | |
1961 | if (unlikely(error)) | |
573c4e1e | 1962 | return error; |
e4f93234 CL |
1963 | |
1964 | entry->prev_cookie = entry->cookie; | |
1965 | error = decode_cookie3(xdr, &entry->cookie); | |
1966 | if (unlikely(error)) | |
573c4e1e | 1967 | return error; |
e4f93234 CL |
1968 | |
1969 | entry->d_type = DT_UNKNOWN; | |
1970 | ||
1971 | if (plus) { | |
1972 | entry->fattr->valid = 0; | |
1973 | error = decode_post_op_attr(xdr, entry->fattr); | |
1974 | if (unlikely(error)) | |
573c4e1e | 1975 | return error; |
e4f93234 CL |
1976 | if (entry->fattr->valid & NFS_ATTR_FATTR_V3) |
1977 | entry->d_type = nfs_umode_to_dtype(entry->fattr->mode); | |
1978 | ||
1979 | /* In fact, a post_op_fh3: */ | |
1980 | p = xdr_inline_decode(xdr, 4); | |
1981 | if (unlikely(p == NULL)) | |
1982 | goto out_overflow; | |
1983 | if (*p != xdr_zero) { | |
1984 | error = decode_nfs_fh3(xdr, entry->fh); | |
1985 | if (unlikely(error)) { | |
1986 | if (error == -E2BIG) | |
1987 | goto out_truncated; | |
573c4e1e | 1988 | return error; |
e4f93234 CL |
1989 | } |
1990 | } else | |
1991 | zero_nfs_fh3(entry->fh); | |
1992 | } | |
1993 | ||
573c4e1e | 1994 | return 0; |
e4f93234 CL |
1995 | |
1996 | out_overflow: | |
1997 | print_overflow_msg(__func__, xdr); | |
573c4e1e | 1998 | return -EAGAIN; |
e4f93234 CL |
1999 | out_truncated: |
2000 | dprintk("NFS: directory entry contains invalid file handle\n"); | |
2001 | *entry = old; | |
573c4e1e | 2002 | return -EAGAIN; |
e4f93234 CL |
2003 | } |
2004 | ||
2005 | /* | |
2006 | * 3.3.16 READDIR3res | |
2007 | * | |
2008 | * struct dirlist3 { | |
2009 | * entry3 *entries; | |
2010 | * bool eof; | |
2011 | * }; | |
2012 | * | |
2013 | * struct READDIR3resok { | |
2014 | * post_op_attr dir_attributes; | |
2015 | * cookieverf3 cookieverf; | |
2016 | * dirlist3 reply; | |
2017 | * }; | |
2018 | * | |
2019 | * struct READDIR3resfail { | |
2020 | * post_op_attr dir_attributes; | |
2021 | * }; | |
2022 | * | |
2023 | * union READDIR3res switch (nfsstat3 status) { | |
2024 | * case NFS3_OK: | |
2025 | * READDIR3resok resok; | |
2026 | * default: | |
2027 | * READDIR3resfail resfail; | |
2028 | * }; | |
2029 | * | |
2030 | * Read the directory contents into the page cache, but otherwise | |
2031 | * don't touch them. The actual decoding is done by nfs3_decode_entry() | |
2032 | * during subsequent nfs_readdir() calls. | |
2033 | */ | |
2034 | static int decode_dirlist3(struct xdr_stream *xdr) | |
2035 | { | |
64bd577e | 2036 | return xdr_read_pages(xdr, xdr->buf->page_len); |
e4f93234 CL |
2037 | } |
2038 | ||
2039 | static int decode_readdir3resok(struct xdr_stream *xdr, | |
2040 | struct nfs3_readdirres *result) | |
2041 | { | |
2042 | int error; | |
2043 | ||
2044 | error = decode_post_op_attr(xdr, result->dir_attr); | |
2045 | if (unlikely(error)) | |
2046 | goto out; | |
2047 | /* XXX: do we need to check if result->verf != NULL ? */ | |
2048 | error = decode_cookieverf3(xdr, result->verf); | |
2049 | if (unlikely(error)) | |
2050 | goto out; | |
2051 | error = decode_dirlist3(xdr); | |
2052 | out: | |
2053 | return error; | |
2054 | } | |
2055 | ||
bf269551 CL |
2056 | static int nfs3_xdr_dec_readdir3res(struct rpc_rqst *req, |
2057 | struct xdr_stream *xdr, | |
e4f93234 CL |
2058 | struct nfs3_readdirres *result) |
2059 | { | |
e4f93234 CL |
2060 | enum nfs_stat status; |
2061 | int error; | |
2062 | ||
bf269551 | 2063 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
2064 | if (unlikely(error)) |
2065 | goto out; | |
2066 | if (status != NFS3_OK) | |
2067 | goto out_default; | |
bf269551 | 2068 | error = decode_readdir3resok(xdr, result); |
e4f93234 CL |
2069 | out: |
2070 | return error; | |
2071 | out_default: | |
bf269551 | 2072 | error = decode_post_op_attr(xdr, result->dir_attr); |
e4f93234 CL |
2073 | if (unlikely(error)) |
2074 | goto out; | |
5e7e5a0d | 2075 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
2076 | } |
2077 | ||
e4f93234 CL |
2078 | /* |
2079 | * 3.3.18 FSSTAT3res | |
2080 | * | |
2081 | * struct FSSTAT3resok { | |
2082 | * post_op_attr obj_attributes; | |
2083 | * size3 tbytes; | |
2084 | * size3 fbytes; | |
2085 | * size3 abytes; | |
2086 | * size3 tfiles; | |
2087 | * size3 ffiles; | |
2088 | * size3 afiles; | |
2089 | * uint32 invarsec; | |
2090 | * }; | |
2091 | * | |
2092 | * struct FSSTAT3resfail { | |
2093 | * post_op_attr obj_attributes; | |
2094 | * }; | |
2095 | * | |
2096 | * union FSSTAT3res switch (nfsstat3 status) { | |
2097 | * case NFS3_OK: | |
2098 | * FSSTAT3resok resok; | |
2099 | * default: | |
2100 | * FSSTAT3resfail resfail; | |
2101 | * }; | |
2102 | */ | |
2103 | static int decode_fsstat3resok(struct xdr_stream *xdr, | |
2104 | struct nfs_fsstat *result) | |
2105 | { | |
2106 | __be32 *p; | |
2107 | ||
2108 | p = xdr_inline_decode(xdr, 8 * 6 + 4); | |
2109 | if (unlikely(p == NULL)) | |
2110 | goto out_overflow; | |
2111 | p = xdr_decode_size3(p, &result->tbytes); | |
2112 | p = xdr_decode_size3(p, &result->fbytes); | |
2113 | p = xdr_decode_size3(p, &result->abytes); | |
2114 | p = xdr_decode_size3(p, &result->tfiles); | |
2115 | p = xdr_decode_size3(p, &result->ffiles); | |
2116 | xdr_decode_size3(p, &result->afiles); | |
2117 | /* ignore invarsec */ | |
2118 | return 0; | |
2119 | out_overflow: | |
2120 | print_overflow_msg(__func__, xdr); | |
2121 | return -EIO; | |
2122 | } | |
2123 | ||
bf269551 CL |
2124 | static int nfs3_xdr_dec_fsstat3res(struct rpc_rqst *req, |
2125 | struct xdr_stream *xdr, | |
e4f93234 CL |
2126 | struct nfs_fsstat *result) |
2127 | { | |
e4f93234 CL |
2128 | enum nfs_stat status; |
2129 | int error; | |
2130 | ||
bf269551 | 2131 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
2132 | if (unlikely(error)) |
2133 | goto out; | |
bf269551 | 2134 | error = decode_post_op_attr(xdr, result->fattr); |
e4f93234 CL |
2135 | if (unlikely(error)) |
2136 | goto out; | |
2137 | if (status != NFS3_OK) | |
2138 | goto out_status; | |
bf269551 | 2139 | error = decode_fsstat3resok(xdr, result); |
e4f93234 CL |
2140 | out: |
2141 | return error; | |
2142 | out_status: | |
5e7e5a0d | 2143 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
2144 | } |
2145 | ||
e4f93234 CL |
2146 | /* |
2147 | * 3.3.19 FSINFO3res | |
2148 | * | |
2149 | * struct FSINFO3resok { | |
2150 | * post_op_attr obj_attributes; | |
2151 | * uint32 rtmax; | |
2152 | * uint32 rtpref; | |
2153 | * uint32 rtmult; | |
2154 | * uint32 wtmax; | |
2155 | * uint32 wtpref; | |
2156 | * uint32 wtmult; | |
2157 | * uint32 dtpref; | |
2158 | * size3 maxfilesize; | |
2159 | * nfstime3 time_delta; | |
2160 | * uint32 properties; | |
2161 | * }; | |
2162 | * | |
2163 | * struct FSINFO3resfail { | |
2164 | * post_op_attr obj_attributes; | |
2165 | * }; | |
2166 | * | |
2167 | * union FSINFO3res switch (nfsstat3 status) { | |
2168 | * case NFS3_OK: | |
2169 | * FSINFO3resok resok; | |
2170 | * default: | |
2171 | * FSINFO3resfail resfail; | |
2172 | * }; | |
2173 | */ | |
2174 | static int decode_fsinfo3resok(struct xdr_stream *xdr, | |
2175 | struct nfs_fsinfo *result) | |
2176 | { | |
2177 | __be32 *p; | |
2178 | ||
2179 | p = xdr_inline_decode(xdr, 4 * 7 + 8 + 8 + 4); | |
2180 | if (unlikely(p == NULL)) | |
2181 | goto out_overflow; | |
2182 | result->rtmax = be32_to_cpup(p++); | |
2183 | result->rtpref = be32_to_cpup(p++); | |
2184 | result->rtmult = be32_to_cpup(p++); | |
2185 | result->wtmax = be32_to_cpup(p++); | |
2186 | result->wtpref = be32_to_cpup(p++); | |
2187 | result->wtmult = be32_to_cpup(p++); | |
2188 | result->dtpref = be32_to_cpup(p++); | |
2189 | p = xdr_decode_size3(p, &result->maxfilesize); | |
f6048709 | 2190 | xdr_decode_nfstime3(p, &result->time_delta); |
e4f93234 CL |
2191 | |
2192 | /* ignore properties */ | |
2193 | result->lease_time = 0; | |
2194 | return 0; | |
2195 | out_overflow: | |
2196 | print_overflow_msg(__func__, xdr); | |
2197 | return -EIO; | |
2198 | } | |
2199 | ||
bf269551 CL |
2200 | static int nfs3_xdr_dec_fsinfo3res(struct rpc_rqst *req, |
2201 | struct xdr_stream *xdr, | |
e4f93234 CL |
2202 | struct nfs_fsinfo *result) |
2203 | { | |
e4f93234 CL |
2204 | enum nfs_stat status; |
2205 | int error; | |
2206 | ||
bf269551 | 2207 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
2208 | if (unlikely(error)) |
2209 | goto out; | |
bf269551 | 2210 | error = decode_post_op_attr(xdr, result->fattr); |
e4f93234 CL |
2211 | if (unlikely(error)) |
2212 | goto out; | |
2213 | if (status != NFS3_OK) | |
2214 | goto out_status; | |
bf269551 | 2215 | error = decode_fsinfo3resok(xdr, result); |
e4f93234 CL |
2216 | out: |
2217 | return error; | |
2218 | out_status: | |
5e7e5a0d | 2219 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
2220 | } |
2221 | ||
e4f93234 CL |
2222 | /* |
2223 | * 3.3.20 PATHCONF3res | |
2224 | * | |
2225 | * struct PATHCONF3resok { | |
2226 | * post_op_attr obj_attributes; | |
2227 | * uint32 linkmax; | |
2228 | * uint32 name_max; | |
2229 | * bool no_trunc; | |
2230 | * bool chown_restricted; | |
2231 | * bool case_insensitive; | |
2232 | * bool case_preserving; | |
2233 | * }; | |
2234 | * | |
2235 | * struct PATHCONF3resfail { | |
2236 | * post_op_attr obj_attributes; | |
2237 | * }; | |
2238 | * | |
2239 | * union PATHCONF3res switch (nfsstat3 status) { | |
2240 | * case NFS3_OK: | |
2241 | * PATHCONF3resok resok; | |
2242 | * default: | |
2243 | * PATHCONF3resfail resfail; | |
2244 | * }; | |
2245 | */ | |
2246 | static int decode_pathconf3resok(struct xdr_stream *xdr, | |
2247 | struct nfs_pathconf *result) | |
2248 | { | |
2249 | __be32 *p; | |
2250 | ||
2251 | p = xdr_inline_decode(xdr, 4 * 6); | |
2252 | if (unlikely(p == NULL)) | |
2253 | goto out_overflow; | |
2254 | result->max_link = be32_to_cpup(p++); | |
2255 | result->max_namelen = be32_to_cpup(p); | |
2256 | /* ignore remaining fields */ | |
2257 | return 0; | |
2258 | out_overflow: | |
2259 | print_overflow_msg(__func__, xdr); | |
2260 | return -EIO; | |
2261 | } | |
2262 | ||
bf269551 CL |
2263 | static int nfs3_xdr_dec_pathconf3res(struct rpc_rqst *req, |
2264 | struct xdr_stream *xdr, | |
e4f93234 CL |
2265 | struct nfs_pathconf *result) |
2266 | { | |
e4f93234 CL |
2267 | enum nfs_stat status; |
2268 | int error; | |
2269 | ||
bf269551 | 2270 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
2271 | if (unlikely(error)) |
2272 | goto out; | |
bf269551 | 2273 | error = decode_post_op_attr(xdr, result->fattr); |
e4f93234 CL |
2274 | if (unlikely(error)) |
2275 | goto out; | |
2276 | if (status != NFS3_OK) | |
2277 | goto out_status; | |
bf269551 | 2278 | error = decode_pathconf3resok(xdr, result); |
e4f93234 CL |
2279 | out: |
2280 | return error; | |
2281 | out_status: | |
5e7e5a0d | 2282 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
2283 | } |
2284 | ||
e4f93234 CL |
2285 | /* |
2286 | * 3.3.21 COMMIT3res | |
2287 | * | |
2288 | * struct COMMIT3resok { | |
2289 | * wcc_data file_wcc; | |
2290 | * writeverf3 verf; | |
2291 | * }; | |
2292 | * | |
2293 | * struct COMMIT3resfail { | |
2294 | * wcc_data file_wcc; | |
2295 | * }; | |
2296 | * | |
2297 | * union COMMIT3res switch (nfsstat3 status) { | |
2298 | * case NFS3_OK: | |
2299 | * COMMIT3resok resok; | |
2300 | * default: | |
2301 | * COMMIT3resfail resfail; | |
2302 | * }; | |
2303 | */ | |
bf269551 CL |
2304 | static int nfs3_xdr_dec_commit3res(struct rpc_rqst *req, |
2305 | struct xdr_stream *xdr, | |
0b7c0153 | 2306 | struct nfs_commitres *result) |
e4f93234 | 2307 | { |
e4f93234 CL |
2308 | enum nfs_stat status; |
2309 | int error; | |
2310 | ||
bf269551 | 2311 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
2312 | if (unlikely(error)) |
2313 | goto out; | |
bf269551 | 2314 | error = decode_wcc_data(xdr, result->fattr); |
e4f93234 CL |
2315 | if (unlikely(error)) |
2316 | goto out; | |
2317 | if (status != NFS3_OK) | |
2318 | goto out_status; | |
2f2c63bc | 2319 | error = decode_writeverf3(xdr, &result->verf->verifier); |
e4f93234 CL |
2320 | out: |
2321 | return error; | |
2322 | out_status: | |
5e7e5a0d | 2323 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
2324 | } |
2325 | ||
b7fa0554 | 2326 | #ifdef CONFIG_NFS_V3_ACL |
b7fa0554 | 2327 | |
e4f93234 CL |
2328 | static inline int decode_getacl3resok(struct xdr_stream *xdr, |
2329 | struct nfs3_getaclres *result) | |
2330 | { | |
2331 | struct posix_acl **acl; | |
2332 | unsigned int *aclcnt; | |
2333 | size_t hdrlen; | |
2334 | int error; | |
2335 | ||
2336 | error = decode_post_op_attr(xdr, result->fattr); | |
2337 | if (unlikely(error)) | |
2338 | goto out; | |
2339 | error = decode_uint32(xdr, &result->mask); | |
2340 | if (unlikely(error)) | |
2341 | goto out; | |
2342 | error = -EINVAL; | |
2343 | if (result->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT)) | |
2344 | goto out; | |
2345 | ||
1aecca3e | 2346 | hdrlen = xdr_stream_pos(xdr); |
e4f93234 CL |
2347 | |
2348 | acl = NULL; | |
2349 | if (result->mask & NFS_ACL) | |
2350 | acl = &result->acl_access; | |
2351 | aclcnt = NULL; | |
2352 | if (result->mask & NFS_ACLCNT) | |
2353 | aclcnt = &result->acl_access_count; | |
2354 | error = nfsacl_decode(xdr->buf, hdrlen, aclcnt, acl); | |
2355 | if (unlikely(error <= 0)) | |
2356 | goto out; | |
2357 | ||
2358 | acl = NULL; | |
2359 | if (result->mask & NFS_DFACL) | |
2360 | acl = &result->acl_default; | |
2361 | aclcnt = NULL; | |
2362 | if (result->mask & NFS_DFACLCNT) | |
2363 | aclcnt = &result->acl_default_count; | |
2364 | error = nfsacl_decode(xdr->buf, hdrlen + error, aclcnt, acl); | |
2365 | if (unlikely(error <= 0)) | |
2366 | return error; | |
2367 | error = 0; | |
2368 | out: | |
2369 | return error; | |
2370 | } | |
2371 | ||
bf269551 CL |
2372 | static int nfs3_xdr_dec_getacl3res(struct rpc_rqst *req, |
2373 | struct xdr_stream *xdr, | |
e4f93234 CL |
2374 | struct nfs3_getaclres *result) |
2375 | { | |
e4f93234 CL |
2376 | enum nfs_stat status; |
2377 | int error; | |
2378 | ||
bf269551 | 2379 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
2380 | if (unlikely(error)) |
2381 | goto out; | |
2382 | if (status != NFS3_OK) | |
2383 | goto out_default; | |
bf269551 | 2384 | error = decode_getacl3resok(xdr, result); |
e4f93234 CL |
2385 | out: |
2386 | return error; | |
2387 | out_default: | |
5e7e5a0d | 2388 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
2389 | } |
2390 | ||
bf269551 CL |
2391 | static int nfs3_xdr_dec_setacl3res(struct rpc_rqst *req, |
2392 | struct xdr_stream *xdr, | |
e4f93234 CL |
2393 | struct nfs_fattr *result) |
2394 | { | |
e4f93234 CL |
2395 | enum nfs_stat status; |
2396 | int error; | |
2397 | ||
bf269551 | 2398 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
2399 | if (unlikely(error)) |
2400 | goto out; | |
2401 | if (status != NFS3_OK) | |
2402 | goto out_default; | |
bf269551 | 2403 | error = decode_post_op_attr(xdr, result); |
e4f93234 CL |
2404 | out: |
2405 | return error; | |
2406 | out_default: | |
5e7e5a0d | 2407 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
2408 | } |
2409 | ||
b7fa0554 AG |
2410 | #endif /* CONFIG_NFS_V3_ACL */ |
2411 | ||
5e7e5a0d BS |
2412 | |
2413 | /* | |
2414 | * We need to translate between nfs status return values and | |
2415 | * the local errno values which may not be the same. | |
2416 | */ | |
2417 | static const struct { | |
2418 | int stat; | |
2419 | int errno; | |
2420 | } nfs_errtbl[] = { | |
2421 | { NFS_OK, 0 }, | |
2422 | { NFSERR_PERM, -EPERM }, | |
2423 | { NFSERR_NOENT, -ENOENT }, | |
2424 | { NFSERR_IO, -errno_NFSERR_IO}, | |
2425 | { NFSERR_NXIO, -ENXIO }, | |
2426 | /* { NFSERR_EAGAIN, -EAGAIN }, */ | |
2427 | { NFSERR_ACCES, -EACCES }, | |
2428 | { NFSERR_EXIST, -EEXIST }, | |
2429 | { NFSERR_XDEV, -EXDEV }, | |
2430 | { NFSERR_NODEV, -ENODEV }, | |
2431 | { NFSERR_NOTDIR, -ENOTDIR }, | |
2432 | { NFSERR_ISDIR, -EISDIR }, | |
2433 | { NFSERR_INVAL, -EINVAL }, | |
2434 | { NFSERR_FBIG, -EFBIG }, | |
2435 | { NFSERR_NOSPC, -ENOSPC }, | |
2436 | { NFSERR_ROFS, -EROFS }, | |
2437 | { NFSERR_MLINK, -EMLINK }, | |
2438 | { NFSERR_NAMETOOLONG, -ENAMETOOLONG }, | |
2439 | { NFSERR_NOTEMPTY, -ENOTEMPTY }, | |
2440 | { NFSERR_DQUOT, -EDQUOT }, | |
2441 | { NFSERR_STALE, -ESTALE }, | |
2442 | { NFSERR_REMOTE, -EREMOTE }, | |
2443 | #ifdef EWFLUSH | |
2444 | { NFSERR_WFLUSH, -EWFLUSH }, | |
2445 | #endif | |
2446 | { NFSERR_BADHANDLE, -EBADHANDLE }, | |
2447 | { NFSERR_NOT_SYNC, -ENOTSYNC }, | |
2448 | { NFSERR_BAD_COOKIE, -EBADCOOKIE }, | |
2449 | { NFSERR_NOTSUPP, -ENOTSUPP }, | |
2450 | { NFSERR_TOOSMALL, -ETOOSMALL }, | |
2451 | { NFSERR_SERVERFAULT, -EREMOTEIO }, | |
2452 | { NFSERR_BADTYPE, -EBADTYPE }, | |
2453 | { NFSERR_JUKEBOX, -EJUKEBOX }, | |
2454 | { -1, -EIO } | |
2455 | }; | |
2456 | ||
2457 | /** | |
2458 | * nfs3_stat_to_errno - convert an NFS status code to a local errno | |
2459 | * @status: NFS status code to convert | |
2460 | * | |
2461 | * Returns a local errno value, or -EIO if the NFS status code is | |
2462 | * not recognized. This function is used jointly by NFSv2 and NFSv3. | |
2463 | */ | |
2464 | static int nfs3_stat_to_errno(enum nfs_stat status) | |
2465 | { | |
2466 | int i; | |
2467 | ||
2468 | for (i = 0; nfs_errtbl[i].stat != -1; i++) { | |
2469 | if (nfs_errtbl[i].stat == (int)status) | |
2470 | return nfs_errtbl[i].errno; | |
2471 | } | |
2472 | dprintk("NFS: Unrecognized nfs status value: %u\n", status); | |
2473 | return nfs_errtbl[i].errno; | |
2474 | } | |
2475 | ||
2476 | ||
1da177e4 LT |
2477 | #define PROC(proc, argtype, restype, timer) \ |
2478 | [NFS3PROC_##proc] = { \ | |
2479 | .p_proc = NFS3PROC_##proc, \ | |
9f06c719 | 2480 | .p_encode = (kxdreproc_t)nfs3_xdr_enc_##argtype##3args, \ |
bf269551 | 2481 | .p_decode = (kxdrdproc_t)nfs3_xdr_dec_##restype##3res, \ |
ad96b5b5 | 2482 | .p_arglen = NFS3_##argtype##args_sz, \ |
f5fc3c50 | 2483 | .p_replen = NFS3_##restype##res_sz, \ |
cc0175c1 CL |
2484 | .p_timer = timer, \ |
2485 | .p_statidx = NFS3PROC_##proc, \ | |
2486 | .p_name = #proc, \ | |
1da177e4 LT |
2487 | } |
2488 | ||
2489 | struct rpc_procinfo nfs3_procedures[] = { | |
f5fc3c50 CL |
2490 | PROC(GETATTR, getattr, getattr, 1), |
2491 | PROC(SETATTR, setattr, setattr, 0), | |
2492 | PROC(LOOKUP, lookup, lookup, 2), | |
2493 | PROC(ACCESS, access, access, 1), | |
2494 | PROC(READLINK, readlink, readlink, 3), | |
2495 | PROC(READ, read, read, 3), | |
2496 | PROC(WRITE, write, write, 4), | |
2497 | PROC(CREATE, create, create, 0), | |
2498 | PROC(MKDIR, mkdir, create, 0), | |
2499 | PROC(SYMLINK, symlink, create, 0), | |
2500 | PROC(MKNOD, mknod, create, 0), | |
2501 | PROC(REMOVE, remove, remove, 0), | |
2502 | PROC(RMDIR, lookup, setattr, 0), | |
2503 | PROC(RENAME, rename, rename, 0), | |
2504 | PROC(LINK, link, link, 0), | |
2505 | PROC(READDIR, readdir, readdir, 3), | |
2506 | PROC(READDIRPLUS, readdirplus, readdir, 3), | |
2507 | PROC(FSSTAT, getattr, fsstat, 0), | |
2508 | PROC(FSINFO, getattr, fsinfo, 0), | |
2509 | PROC(PATHCONF, getattr, pathconf, 0), | |
2510 | PROC(COMMIT, commit, commit, 5), | |
1da177e4 LT |
2511 | }; |
2512 | ||
a613fa16 | 2513 | const struct rpc_version nfs_version3 = { |
1da177e4 | 2514 | .number = 3, |
e8c96f8c | 2515 | .nrprocs = ARRAY_SIZE(nfs3_procedures), |
1da177e4 LT |
2516 | .procs = nfs3_procedures |
2517 | }; | |
2518 | ||
b7fa0554 AG |
2519 | #ifdef CONFIG_NFS_V3_ACL |
2520 | static struct rpc_procinfo nfs3_acl_procedures[] = { | |
2521 | [ACLPROC3_GETACL] = { | |
2522 | .p_proc = ACLPROC3_GETACL, | |
9f06c719 | 2523 | .p_encode = (kxdreproc_t)nfs3_xdr_enc_getacl3args, |
bf269551 | 2524 | .p_decode = (kxdrdproc_t)nfs3_xdr_dec_getacl3res, |
2bea90d4 CL |
2525 | .p_arglen = ACL3_getaclargs_sz, |
2526 | .p_replen = ACL3_getaclres_sz, | |
b7fa0554 | 2527 | .p_timer = 1, |
cc0175c1 | 2528 | .p_name = "GETACL", |
b7fa0554 AG |
2529 | }, |
2530 | [ACLPROC3_SETACL] = { | |
2531 | .p_proc = ACLPROC3_SETACL, | |
9f06c719 | 2532 | .p_encode = (kxdreproc_t)nfs3_xdr_enc_setacl3args, |
bf269551 | 2533 | .p_decode = (kxdrdproc_t)nfs3_xdr_dec_setacl3res, |
2bea90d4 CL |
2534 | .p_arglen = ACL3_setaclargs_sz, |
2535 | .p_replen = ACL3_setaclres_sz, | |
b7fa0554 | 2536 | .p_timer = 0, |
cc0175c1 | 2537 | .p_name = "SETACL", |
b7fa0554 AG |
2538 | }, |
2539 | }; | |
2540 | ||
a613fa16 | 2541 | const struct rpc_version nfsacl_version3 = { |
b7fa0554 AG |
2542 | .number = 3, |
2543 | .nrprocs = sizeof(nfs3_acl_procedures)/ | |
2544 | sizeof(nfs3_acl_procedures[0]), | |
2545 | .procs = nfs3_acl_procedures, | |
2546 | }; | |
2547 | #endif /* CONFIG_NFS_V3_ACL */ |