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; | |
249 | size_t hdrlen; | |
250 | __be32 *p; | |
251 | ||
252 | p = xdr_inline_decode(xdr, 4); | |
253 | if (unlikely(p == NULL)) | |
254 | goto out_overflow; | |
255 | count = be32_to_cpup(p); | |
256 | if (unlikely(count >= xdr->buf->page_len || count > NFS3_MAXPATHLEN)) | |
257 | goto out_nametoolong; | |
258 | hdrlen = (u8 *)xdr->p - (u8 *)xdr->iov->iov_base; | |
259 | recvd = xdr->buf->len - hdrlen; | |
260 | if (unlikely(count > recvd)) | |
261 | goto out_cheating; | |
262 | ||
263 | xdr_read_pages(xdr, count); | |
264 | xdr_terminate_string(xdr->buf, count); | |
265 | return 0; | |
266 | ||
267 | out_nametoolong: | |
268 | dprintk("NFS: returned pathname too long: %u\n", count); | |
269 | return -ENAMETOOLONG; | |
270 | out_cheating: | |
271 | dprintk("NFS: server cheating in pathname result: " | |
272 | "count %u > recvd %u\n", count, recvd); | |
273 | return -EIO; | |
274 | out_overflow: | |
275 | print_overflow_msg(__func__, xdr); | |
276 | return -EIO; | |
277 | } | |
278 | ||
d9c407b1 CL |
279 | /* |
280 | * cookie3 | |
281 | * | |
282 | * typedef uint64 cookie3 | |
283 | */ | |
284 | static __be32 *xdr_encode_cookie3(__be32 *p, u64 cookie) | |
285 | { | |
286 | return xdr_encode_hyper(p, cookie); | |
287 | } | |
288 | ||
e4f93234 CL |
289 | static int decode_cookie3(struct xdr_stream *xdr, u64 *cookie) |
290 | { | |
291 | return decode_uint64(xdr, cookie); | |
292 | } | |
293 | ||
d9c407b1 CL |
294 | /* |
295 | * cookieverf3 | |
296 | * | |
297 | * typedef opaque cookieverf3[NFS3_COOKIEVERFSIZE]; | |
298 | */ | |
299 | static __be32 *xdr_encode_cookieverf3(__be32 *p, const __be32 *verifier) | |
300 | { | |
301 | memcpy(p, verifier, NFS3_COOKIEVERFSIZE); | |
302 | return p + XDR_QUADLEN(NFS3_COOKIEVERFSIZE); | |
303 | } | |
304 | ||
e4f93234 CL |
305 | static int decode_cookieverf3(struct xdr_stream *xdr, __be32 *verifier) |
306 | { | |
307 | __be32 *p; | |
308 | ||
309 | p = xdr_inline_decode(xdr, NFS3_COOKIEVERFSIZE); | |
310 | if (unlikely(p == NULL)) | |
311 | goto out_overflow; | |
312 | memcpy(verifier, p, NFS3_COOKIEVERFSIZE); | |
313 | return 0; | |
314 | out_overflow: | |
315 | print_overflow_msg(__func__, xdr); | |
316 | return -EIO; | |
317 | } | |
318 | ||
d9c407b1 CL |
319 | /* |
320 | * createverf3 | |
321 | * | |
322 | * typedef opaque createverf3[NFS3_CREATEVERFSIZE]; | |
323 | */ | |
324 | static void encode_createverf3(struct xdr_stream *xdr, const __be32 *verifier) | |
325 | { | |
326 | __be32 *p; | |
327 | ||
328 | p = xdr_reserve_space(xdr, NFS3_CREATEVERFSIZE); | |
329 | memcpy(p, verifier, NFS3_CREATEVERFSIZE); | |
330 | } | |
331 | ||
e4f93234 CL |
332 | static int decode_writeverf3(struct xdr_stream *xdr, __be32 *verifier) |
333 | { | |
334 | __be32 *p; | |
335 | ||
336 | p = xdr_inline_decode(xdr, NFS3_WRITEVERFSIZE); | |
337 | if (unlikely(p == NULL)) | |
338 | goto out_overflow; | |
339 | memcpy(verifier, p, NFS3_WRITEVERFSIZE); | |
340 | return 0; | |
341 | out_overflow: | |
342 | print_overflow_msg(__func__, xdr); | |
343 | return -EIO; | |
344 | } | |
345 | ||
346 | /* | |
347 | * size3 | |
348 | * | |
349 | * typedef uint64 size3; | |
350 | */ | |
351 | static __be32 *xdr_decode_size3(__be32 *p, u64 *size) | |
352 | { | |
353 | return xdr_decode_hyper(p, size); | |
354 | } | |
355 | ||
356 | /* | |
357 | * nfsstat3 | |
358 | * | |
359 | * enum nfsstat3 { | |
360 | * NFS3_OK = 0, | |
361 | * ... | |
362 | * } | |
363 | */ | |
364 | #define NFS3_OK NFS_OK | |
365 | ||
366 | static int decode_nfsstat3(struct xdr_stream *xdr, enum nfs_stat *status) | |
367 | { | |
368 | __be32 *p; | |
369 | ||
370 | p = xdr_inline_decode(xdr, 4); | |
371 | if (unlikely(p == NULL)) | |
372 | goto out_overflow; | |
373 | *status = be32_to_cpup(p); | |
374 | return 0; | |
375 | out_overflow: | |
376 | print_overflow_msg(__func__, xdr); | |
377 | return -EIO; | |
378 | } | |
379 | ||
d9c407b1 CL |
380 | /* |
381 | * ftype3 | |
382 | * | |
383 | * enum ftype3 { | |
384 | * NF3REG = 1, | |
385 | * NF3DIR = 2, | |
386 | * NF3BLK = 3, | |
387 | * NF3CHR = 4, | |
388 | * NF3LNK = 5, | |
389 | * NF3SOCK = 6, | |
390 | * NF3FIFO = 7 | |
391 | * }; | |
392 | */ | |
393 | static void encode_ftype3(struct xdr_stream *xdr, const u32 type) | |
394 | { | |
395 | BUG_ON(type > NF3FIFO); | |
396 | encode_uint32(xdr, type); | |
397 | } | |
398 | ||
f6048709 CL |
399 | static __be32 *xdr_decode_ftype3(__be32 *p, umode_t *mode) |
400 | { | |
401 | u32 type; | |
402 | ||
403 | type = be32_to_cpup(p++); | |
404 | if (type > NF3FIFO) | |
405 | type = NF3NON; | |
406 | *mode = nfs_type2fmt[type]; | |
407 | return p; | |
408 | } | |
409 | ||
d9c407b1 CL |
410 | /* |
411 | * specdata3 | |
412 | * | |
413 | * struct specdata3 { | |
414 | * uint32 specdata1; | |
415 | * uint32 specdata2; | |
416 | * }; | |
417 | */ | |
418 | static void encode_specdata3(struct xdr_stream *xdr, const dev_t rdev) | |
419 | { | |
420 | __be32 *p; | |
421 | ||
422 | p = xdr_reserve_space(xdr, 8); | |
423 | *p++ = cpu_to_be32(MAJOR(rdev)); | |
424 | *p = cpu_to_be32(MINOR(rdev)); | |
425 | } | |
426 | ||
f6048709 CL |
427 | static __be32 *xdr_decode_specdata3(__be32 *p, dev_t *rdev) |
428 | { | |
429 | unsigned int major, minor; | |
430 | ||
431 | major = be32_to_cpup(p++); | |
432 | minor = be32_to_cpup(p++); | |
433 | *rdev = MKDEV(major, minor); | |
434 | if (MAJOR(*rdev) != major || MINOR(*rdev) != minor) | |
435 | *rdev = 0; | |
436 | return p; | |
437 | } | |
438 | ||
d9c407b1 CL |
439 | /* |
440 | * nfs_fh3 | |
441 | * | |
442 | * struct nfs_fh3 { | |
443 | * opaque data<NFS3_FHSIZE>; | |
444 | * }; | |
445 | */ | |
446 | static void encode_nfs_fh3(struct xdr_stream *xdr, const struct nfs_fh *fh) | |
447 | { | |
448 | __be32 *p; | |
449 | ||
450 | BUG_ON(fh->size > NFS3_FHSIZE); | |
451 | p = xdr_reserve_space(xdr, 4 + fh->size); | |
452 | xdr_encode_opaque(p, fh->data, fh->size); | |
453 | } | |
454 | ||
e4f93234 CL |
455 | static int decode_nfs_fh3(struct xdr_stream *xdr, struct nfs_fh *fh) |
456 | { | |
457 | u32 length; | |
458 | __be32 *p; | |
459 | ||
460 | p = xdr_inline_decode(xdr, 4); | |
461 | if (unlikely(p == NULL)) | |
462 | goto out_overflow; | |
463 | length = be32_to_cpup(p++); | |
464 | if (unlikely(length > NFS3_FHSIZE)) | |
465 | goto out_toobig; | |
466 | p = xdr_inline_decode(xdr, length); | |
467 | if (unlikely(p == NULL)) | |
468 | goto out_overflow; | |
469 | fh->size = length; | |
470 | memcpy(fh->data, p, length); | |
471 | return 0; | |
472 | out_toobig: | |
473 | dprintk("NFS: file handle size (%u) too big\n", length); | |
474 | return -E2BIG; | |
475 | out_overflow: | |
476 | print_overflow_msg(__func__, xdr); | |
477 | return -EIO; | |
478 | } | |
479 | ||
480 | static void zero_nfs_fh3(struct nfs_fh *fh) | |
481 | { | |
482 | memset(fh, 0, sizeof(*fh)); | |
483 | } | |
484 | ||
9d5a6434 CL |
485 | /* |
486 | * nfstime3 | |
487 | * | |
488 | * struct nfstime3 { | |
489 | * uint32 seconds; | |
490 | * uint32 nseconds; | |
491 | * }; | |
492 | */ | |
493 | static __be32 *xdr_encode_nfstime3(__be32 *p, const struct timespec *timep) | |
494 | { | |
495 | *p++ = cpu_to_be32(timep->tv_sec); | |
496 | *p++ = cpu_to_be32(timep->tv_nsec); | |
497 | return p; | |
498 | } | |
499 | ||
f6048709 CL |
500 | static __be32 *xdr_decode_nfstime3(__be32 *p, struct timespec *timep) |
501 | { | |
502 | timep->tv_sec = be32_to_cpup(p++); | |
503 | timep->tv_nsec = be32_to_cpup(p++); | |
504 | return p; | |
505 | } | |
506 | ||
d9c407b1 CL |
507 | /* |
508 | * sattr3 | |
509 | * | |
510 | * enum time_how { | |
511 | * DONT_CHANGE = 0, | |
512 | * SET_TO_SERVER_TIME = 1, | |
513 | * SET_TO_CLIENT_TIME = 2 | |
514 | * }; | |
515 | * | |
516 | * union set_mode3 switch (bool set_it) { | |
517 | * case TRUE: | |
518 | * mode3 mode; | |
519 | * default: | |
520 | * void; | |
521 | * }; | |
522 | * | |
523 | * union set_uid3 switch (bool set_it) { | |
524 | * case TRUE: | |
525 | * uid3 uid; | |
526 | * default: | |
527 | * void; | |
528 | * }; | |
529 | * | |
530 | * union set_gid3 switch (bool set_it) { | |
531 | * case TRUE: | |
532 | * gid3 gid; | |
533 | * default: | |
534 | * void; | |
535 | * }; | |
536 | * | |
537 | * union set_size3 switch (bool set_it) { | |
538 | * case TRUE: | |
539 | * size3 size; | |
540 | * default: | |
541 | * void; | |
542 | * }; | |
543 | * | |
544 | * union set_atime switch (time_how set_it) { | |
545 | * case SET_TO_CLIENT_TIME: | |
546 | * nfstime3 atime; | |
547 | * default: | |
548 | * void; | |
549 | * }; | |
550 | * | |
551 | * union set_mtime switch (time_how set_it) { | |
552 | * case SET_TO_CLIENT_TIME: | |
553 | * nfstime3 mtime; | |
554 | * default: | |
555 | * void; | |
556 | * }; | |
557 | * | |
558 | * struct sattr3 { | |
559 | * set_mode3 mode; | |
560 | * set_uid3 uid; | |
561 | * set_gid3 gid; | |
562 | * set_size3 size; | |
563 | * set_atime atime; | |
564 | * set_mtime mtime; | |
565 | * }; | |
566 | */ | |
567 | static void encode_sattr3(struct xdr_stream *xdr, const struct iattr *attr) | |
568 | { | |
569 | u32 nbytes; | |
570 | __be32 *p; | |
571 | ||
572 | /* | |
573 | * In order to make only a single xdr_reserve_space() call, | |
574 | * pre-compute the total number of bytes to be reserved. | |
575 | * Six boolean values, one for each set_foo field, are always | |
576 | * present in the encoded result, so start there. | |
577 | */ | |
578 | nbytes = 6 * 4; | |
579 | if (attr->ia_valid & ATTR_MODE) | |
580 | nbytes += 4; | |
581 | if (attr->ia_valid & ATTR_UID) | |
582 | nbytes += 4; | |
583 | if (attr->ia_valid & ATTR_GID) | |
584 | nbytes += 4; | |
585 | if (attr->ia_valid & ATTR_SIZE) | |
586 | nbytes += 8; | |
587 | if (attr->ia_valid & ATTR_ATIME_SET) | |
588 | nbytes += 8; | |
589 | if (attr->ia_valid & ATTR_MTIME_SET) | |
590 | nbytes += 8; | |
591 | p = xdr_reserve_space(xdr, nbytes); | |
592 | ||
9d5a6434 CL |
593 | if (attr->ia_valid & ATTR_MODE) { |
594 | *p++ = xdr_one; | |
595 | *p++ = cpu_to_be32(attr->ia_mode & S_IALLUGO); | |
596 | } else | |
597 | *p++ = xdr_zero; | |
598 | ||
599 | if (attr->ia_valid & ATTR_UID) { | |
600 | *p++ = xdr_one; | |
601 | *p++ = cpu_to_be32(attr->ia_uid); | |
602 | } else | |
603 | *p++ = xdr_zero; | |
604 | ||
605 | if (attr->ia_valid & ATTR_GID) { | |
606 | *p++ = xdr_one; | |
607 | *p++ = cpu_to_be32(attr->ia_gid); | |
608 | } else | |
609 | *p++ = xdr_zero; | |
610 | ||
611 | if (attr->ia_valid & ATTR_SIZE) { | |
612 | *p++ = xdr_one; | |
613 | p = xdr_encode_hyper(p, (u64)attr->ia_size); | |
614 | } else | |
615 | *p++ = xdr_zero; | |
616 | ||
617 | if (attr->ia_valid & ATTR_ATIME_SET) { | |
618 | *p++ = xdr_two; | |
619 | p = xdr_encode_nfstime3(p, &attr->ia_atime); | |
620 | } else if (attr->ia_valid & ATTR_ATIME) { | |
621 | *p++ = xdr_one; | |
622 | } else | |
623 | *p++ = xdr_zero; | |
624 | ||
625 | if (attr->ia_valid & ATTR_MTIME_SET) { | |
626 | *p++ = xdr_two; | |
627 | xdr_encode_nfstime3(p, &attr->ia_mtime); | |
628 | } else if (attr->ia_valid & ATTR_MTIME) { | |
629 | *p = xdr_one; | |
630 | } else | |
631 | *p = xdr_zero; | |
d9c407b1 CL |
632 | } |
633 | ||
e4f93234 CL |
634 | /* |
635 | * fattr3 | |
636 | * | |
637 | * struct fattr3 { | |
638 | * ftype3 type; | |
639 | * mode3 mode; | |
640 | * uint32 nlink; | |
641 | * uid3 uid; | |
642 | * gid3 gid; | |
643 | * size3 size; | |
644 | * size3 used; | |
645 | * specdata3 rdev; | |
646 | * uint64 fsid; | |
647 | * fileid3 fileid; | |
648 | * nfstime3 atime; | |
649 | * nfstime3 mtime; | |
650 | * nfstime3 ctime; | |
651 | * }; | |
652 | */ | |
653 | static int decode_fattr3(struct xdr_stream *xdr, struct nfs_fattr *fattr) | |
654 | { | |
f6048709 | 655 | umode_t fmode; |
e4f93234 CL |
656 | __be32 *p; |
657 | ||
658 | p = xdr_inline_decode(xdr, NFS3_fattr_sz << 2); | |
659 | if (unlikely(p == NULL)) | |
660 | goto out_overflow; | |
f6048709 CL |
661 | |
662 | p = xdr_decode_ftype3(p, &fmode); | |
663 | ||
664 | fattr->mode = (be32_to_cpup(p++) & ~S_IFMT) | fmode; | |
665 | fattr->nlink = be32_to_cpup(p++); | |
666 | fattr->uid = be32_to_cpup(p++); | |
667 | fattr->gid = be32_to_cpup(p++); | |
668 | ||
669 | p = xdr_decode_size3(p, &fattr->size); | |
670 | p = xdr_decode_size3(p, &fattr->du.nfs3.used); | |
671 | p = xdr_decode_specdata3(p, &fattr->rdev); | |
672 | ||
673 | p = xdr_decode_hyper(p, &fattr->fsid.major); | |
674 | fattr->fsid.minor = 0; | |
675 | ||
676 | p = xdr_decode_fileid3(p, &fattr->fileid); | |
677 | p = xdr_decode_nfstime3(p, &fattr->atime); | |
678 | p = xdr_decode_nfstime3(p, &fattr->mtime); | |
679 | xdr_decode_nfstime3(p, &fattr->ctime); | |
3a1556e8 | 680 | fattr->change_attr = nfs_timespec_to_change_attr(&fattr->ctime); |
f6048709 CL |
681 | |
682 | fattr->valid |= NFS_ATTR_FATTR_V3; | |
e4f93234 CL |
683 | return 0; |
684 | out_overflow: | |
685 | print_overflow_msg(__func__, xdr); | |
686 | return -EIO; | |
687 | } | |
688 | ||
689 | /* | |
690 | * post_op_attr | |
691 | * | |
692 | * union post_op_attr switch (bool attributes_follow) { | |
693 | * case TRUE: | |
694 | * fattr3 attributes; | |
695 | * case FALSE: | |
696 | * void; | |
697 | * }; | |
698 | */ | |
699 | static int decode_post_op_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr) | |
700 | { | |
701 | __be32 *p; | |
702 | ||
703 | p = xdr_inline_decode(xdr, 4); | |
704 | if (unlikely(p == NULL)) | |
705 | goto out_overflow; | |
706 | if (*p != xdr_zero) | |
707 | return decode_fattr3(xdr, fattr); | |
708 | return 0; | |
709 | out_overflow: | |
710 | print_overflow_msg(__func__, xdr); | |
711 | return -EIO; | |
712 | } | |
713 | ||
714 | /* | |
715 | * wcc_attr | |
716 | * struct wcc_attr { | |
717 | * size3 size; | |
718 | * nfstime3 mtime; | |
719 | * nfstime3 ctime; | |
720 | * }; | |
721 | */ | |
722 | static int decode_wcc_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr) | |
723 | { | |
724 | __be32 *p; | |
725 | ||
726 | p = xdr_inline_decode(xdr, NFS3_wcc_attr_sz << 2); | |
727 | if (unlikely(p == NULL)) | |
728 | goto out_overflow; | |
f6048709 CL |
729 | |
730 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE | |
3a1556e8 | 731 | | NFS_ATTR_FATTR_PRECHANGE |
f6048709 CL |
732 | | NFS_ATTR_FATTR_PREMTIME |
733 | | NFS_ATTR_FATTR_PRECTIME; | |
734 | ||
735 | p = xdr_decode_size3(p, &fattr->pre_size); | |
736 | p = xdr_decode_nfstime3(p, &fattr->pre_mtime); | |
737 | xdr_decode_nfstime3(p, &fattr->pre_ctime); | |
3a1556e8 | 738 | fattr->pre_change_attr = nfs_timespec_to_change_attr(&fattr->pre_ctime); |
f6048709 | 739 | |
e4f93234 CL |
740 | return 0; |
741 | out_overflow: | |
742 | print_overflow_msg(__func__, xdr); | |
743 | return -EIO; | |
744 | } | |
745 | ||
746 | /* | |
747 | * pre_op_attr | |
748 | * union pre_op_attr switch (bool attributes_follow) { | |
749 | * case TRUE: | |
750 | * wcc_attr attributes; | |
751 | * case FALSE: | |
752 | * void; | |
753 | * }; | |
754 | * | |
755 | * wcc_data | |
756 | * | |
757 | * struct wcc_data { | |
758 | * pre_op_attr before; | |
759 | * post_op_attr after; | |
760 | * }; | |
761 | */ | |
762 | static int decode_pre_op_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr) | |
763 | { | |
764 | __be32 *p; | |
765 | ||
766 | p = xdr_inline_decode(xdr, 4); | |
767 | if (unlikely(p == NULL)) | |
768 | goto out_overflow; | |
769 | if (*p != xdr_zero) | |
770 | return decode_wcc_attr(xdr, fattr); | |
771 | return 0; | |
772 | out_overflow: | |
773 | print_overflow_msg(__func__, xdr); | |
774 | return -EIO; | |
775 | } | |
776 | ||
777 | static int decode_wcc_data(struct xdr_stream *xdr, struct nfs_fattr *fattr) | |
778 | { | |
779 | int error; | |
780 | ||
781 | error = decode_pre_op_attr(xdr, fattr); | |
782 | if (unlikely(error)) | |
783 | goto out; | |
784 | error = decode_post_op_attr(xdr, fattr); | |
785 | out: | |
786 | return error; | |
787 | } | |
788 | ||
789 | /* | |
790 | * post_op_fh3 | |
791 | * | |
792 | * union post_op_fh3 switch (bool handle_follows) { | |
793 | * case TRUE: | |
794 | * nfs_fh3 handle; | |
795 | * case FALSE: | |
796 | * void; | |
797 | * }; | |
798 | */ | |
799 | static int decode_post_op_fh3(struct xdr_stream *xdr, struct nfs_fh *fh) | |
800 | { | |
801 | __be32 *p = xdr_inline_decode(xdr, 4); | |
802 | if (unlikely(p == NULL)) | |
803 | goto out_overflow; | |
804 | if (*p != xdr_zero) | |
805 | return decode_nfs_fh3(xdr, fh); | |
806 | zero_nfs_fh3(fh); | |
807 | return 0; | |
808 | out_overflow: | |
809 | print_overflow_msg(__func__, xdr); | |
810 | return -EIO; | |
811 | } | |
812 | ||
d9c407b1 CL |
813 | /* |
814 | * diropargs3 | |
815 | * | |
816 | * struct diropargs3 { | |
817 | * nfs_fh3 dir; | |
818 | * filename3 name; | |
819 | * }; | |
820 | */ | |
821 | static void encode_diropargs3(struct xdr_stream *xdr, const struct nfs_fh *fh, | |
822 | const char *name, u32 length) | |
823 | { | |
824 | encode_nfs_fh3(xdr, fh); | |
825 | encode_filename3(xdr, name, length); | |
826 | } | |
827 | ||
828 | ||
1da177e4 | 829 | /* |
499ff710 CL |
830 | * NFSv3 XDR encode functions |
831 | * | |
832 | * NFSv3 argument types are defined in section 3.3 of RFC 1813: | |
833 | * "NFS Version 3 Protocol Specification". | |
1da177e4 LT |
834 | */ |
835 | ||
d9c407b1 CL |
836 | /* |
837 | * 3.3.1 GETATTR3args | |
838 | * | |
839 | * struct GETATTR3args { | |
840 | * nfs_fh3 object; | |
841 | * }; | |
842 | */ | |
9f06c719 CL |
843 | static void nfs3_xdr_enc_getattr3args(struct rpc_rqst *req, |
844 | struct xdr_stream *xdr, | |
845 | const struct nfs_fh *fh) | |
d9c407b1 | 846 | { |
9f06c719 | 847 | encode_nfs_fh3(xdr, fh); |
d9c407b1 CL |
848 | } |
849 | ||
d9c407b1 CL |
850 | /* |
851 | * 3.3.2 SETATTR3args | |
852 | * | |
853 | * union sattrguard3 switch (bool check) { | |
854 | * case TRUE: | |
855 | * nfstime3 obj_ctime; | |
856 | * case FALSE: | |
857 | * void; | |
858 | * }; | |
859 | * | |
860 | * struct SETATTR3args { | |
861 | * nfs_fh3 object; | |
862 | * sattr3 new_attributes; | |
863 | * sattrguard3 guard; | |
864 | * }; | |
865 | */ | |
866 | static void encode_sattrguard3(struct xdr_stream *xdr, | |
867 | const struct nfs3_sattrargs *args) | |
868 | { | |
869 | __be32 *p; | |
870 | ||
871 | if (args->guard) { | |
872 | p = xdr_reserve_space(xdr, 4 + 8); | |
873 | *p++ = xdr_one; | |
9d5a6434 | 874 | xdr_encode_nfstime3(p, &args->guardtime); |
d9c407b1 CL |
875 | } else { |
876 | p = xdr_reserve_space(xdr, 4); | |
877 | *p = xdr_zero; | |
878 | } | |
879 | } | |
880 | ||
9f06c719 CL |
881 | static void nfs3_xdr_enc_setattr3args(struct rpc_rqst *req, |
882 | struct xdr_stream *xdr, | |
883 | const struct nfs3_sattrargs *args) | |
d9c407b1 | 884 | { |
9f06c719 CL |
885 | encode_nfs_fh3(xdr, args->fh); |
886 | encode_sattr3(xdr, args->sattr); | |
887 | encode_sattrguard3(xdr, args); | |
d9c407b1 CL |
888 | } |
889 | ||
d9c407b1 CL |
890 | /* |
891 | * 3.3.3 LOOKUP3args | |
892 | * | |
893 | * struct LOOKUP3args { | |
894 | * diropargs3 what; | |
895 | * }; | |
896 | */ | |
9f06c719 CL |
897 | static void nfs3_xdr_enc_lookup3args(struct rpc_rqst *req, |
898 | struct xdr_stream *xdr, | |
899 | const struct nfs3_diropargs *args) | |
d9c407b1 | 900 | { |
9f06c719 | 901 | encode_diropargs3(xdr, args->fh, args->name, args->len); |
d9c407b1 CL |
902 | } |
903 | ||
d9c407b1 CL |
904 | /* |
905 | * 3.3.4 ACCESS3args | |
906 | * | |
907 | * struct ACCESS3args { | |
908 | * nfs_fh3 object; | |
909 | * uint32 access; | |
910 | * }; | |
911 | */ | |
912 | static void encode_access3args(struct xdr_stream *xdr, | |
913 | const struct nfs3_accessargs *args) | |
914 | { | |
915 | encode_nfs_fh3(xdr, args->fh); | |
916 | encode_uint32(xdr, args->access); | |
917 | } | |
918 | ||
9f06c719 CL |
919 | static void nfs3_xdr_enc_access3args(struct rpc_rqst *req, |
920 | struct xdr_stream *xdr, | |
921 | const struct nfs3_accessargs *args) | |
d9c407b1 | 922 | { |
9f06c719 | 923 | encode_access3args(xdr, args); |
d9c407b1 CL |
924 | } |
925 | ||
926 | /* | |
927 | * 3.3.5 READLINK3args | |
928 | * | |
929 | * struct READLINK3args { | |
930 | * nfs_fh3 symlink; | |
931 | * }; | |
932 | */ | |
9f06c719 CL |
933 | static void nfs3_xdr_enc_readlink3args(struct rpc_rqst *req, |
934 | struct xdr_stream *xdr, | |
935 | const struct nfs3_readlinkargs *args) | |
d9c407b1 | 936 | { |
9f06c719 | 937 | encode_nfs_fh3(xdr, args->fh); |
d9c407b1 CL |
938 | prepare_reply_buffer(req, args->pages, args->pgbase, |
939 | args->pglen, NFS3_readlinkres_sz); | |
d9c407b1 CL |
940 | } |
941 | ||
d9c407b1 CL |
942 | /* |
943 | * 3.3.6 READ3args | |
944 | * | |
945 | * struct READ3args { | |
946 | * nfs_fh3 file; | |
947 | * offset3 offset; | |
948 | * count3 count; | |
949 | * }; | |
950 | */ | |
951 | static void encode_read3args(struct xdr_stream *xdr, | |
952 | const struct nfs_readargs *args) | |
953 | { | |
954 | __be32 *p; | |
955 | ||
956 | encode_nfs_fh3(xdr, args->fh); | |
957 | ||
958 | p = xdr_reserve_space(xdr, 8 + 4); | |
959 | p = xdr_encode_hyper(p, args->offset); | |
960 | *p = cpu_to_be32(args->count); | |
961 | } | |
962 | ||
9f06c719 CL |
963 | static void nfs3_xdr_enc_read3args(struct rpc_rqst *req, |
964 | struct xdr_stream *xdr, | |
965 | const struct nfs_readargs *args) | |
d9c407b1 | 966 | { |
9f06c719 | 967 | encode_read3args(xdr, args); |
d9c407b1 CL |
968 | prepare_reply_buffer(req, args->pages, args->pgbase, |
969 | args->count, NFS3_readres_sz); | |
970 | req->rq_rcv_buf.flags |= XDRBUF_READ; | |
d9c407b1 CL |
971 | } |
972 | ||
d9c407b1 CL |
973 | /* |
974 | * 3.3.7 WRITE3args | |
975 | * | |
976 | * enum stable_how { | |
977 | * UNSTABLE = 0, | |
978 | * DATA_SYNC = 1, | |
979 | * FILE_SYNC = 2 | |
980 | * }; | |
981 | * | |
982 | * struct WRITE3args { | |
983 | * nfs_fh3 file; | |
984 | * offset3 offset; | |
985 | * count3 count; | |
986 | * stable_how stable; | |
987 | * opaque data<>; | |
988 | * }; | |
989 | */ | |
990 | static void encode_write3args(struct xdr_stream *xdr, | |
991 | const struct nfs_writeargs *args) | |
992 | { | |
993 | __be32 *p; | |
994 | ||
995 | encode_nfs_fh3(xdr, args->fh); | |
996 | ||
997 | p = xdr_reserve_space(xdr, 8 + 4 + 4 + 4); | |
998 | p = xdr_encode_hyper(p, args->offset); | |
999 | *p++ = cpu_to_be32(args->count); | |
d9c407b1 | 1000 | *p++ = cpu_to_be32(args->stable); |
d9c407b1 CL |
1001 | *p = cpu_to_be32(args->count); |
1002 | xdr_write_pages(xdr, args->pages, args->pgbase, args->count); | |
1003 | } | |
1004 | ||
9f06c719 CL |
1005 | static void nfs3_xdr_enc_write3args(struct rpc_rqst *req, |
1006 | struct xdr_stream *xdr, | |
1007 | const struct nfs_writeargs *args) | |
d9c407b1 | 1008 | { |
9f06c719 CL |
1009 | encode_write3args(xdr, args); |
1010 | xdr->buf->flags |= XDRBUF_WRITE; | |
d9c407b1 CL |
1011 | } |
1012 | ||
d9c407b1 CL |
1013 | /* |
1014 | * 3.3.8 CREATE3args | |
1015 | * | |
1016 | * enum createmode3 { | |
1017 | * UNCHECKED = 0, | |
1018 | * GUARDED = 1, | |
1019 | * EXCLUSIVE = 2 | |
1020 | * }; | |
1021 | * | |
1022 | * union createhow3 switch (createmode3 mode) { | |
1023 | * case UNCHECKED: | |
1024 | * case GUARDED: | |
1025 | * sattr3 obj_attributes; | |
1026 | * case EXCLUSIVE: | |
1027 | * createverf3 verf; | |
1028 | * }; | |
1029 | * | |
1030 | * struct CREATE3args { | |
1031 | * diropargs3 where; | |
1032 | * createhow3 how; | |
1033 | * }; | |
1034 | */ | |
1035 | static void encode_createhow3(struct xdr_stream *xdr, | |
1036 | const struct nfs3_createargs *args) | |
1037 | { | |
1038 | encode_uint32(xdr, args->createmode); | |
1039 | switch (args->createmode) { | |
1040 | case NFS3_CREATE_UNCHECKED: | |
1041 | case NFS3_CREATE_GUARDED: | |
1042 | encode_sattr3(xdr, args->sattr); | |
1043 | break; | |
1044 | case NFS3_CREATE_EXCLUSIVE: | |
1045 | encode_createverf3(xdr, args->verifier); | |
1046 | break; | |
1047 | default: | |
1048 | BUG(); | |
1049 | } | |
1050 | } | |
1051 | ||
9f06c719 CL |
1052 | static void nfs3_xdr_enc_create3args(struct rpc_rqst *req, |
1053 | struct xdr_stream *xdr, | |
1054 | const struct nfs3_createargs *args) | |
d9c407b1 | 1055 | { |
9f06c719 CL |
1056 | encode_diropargs3(xdr, args->fh, args->name, args->len); |
1057 | encode_createhow3(xdr, args); | |
d9c407b1 CL |
1058 | } |
1059 | ||
d9c407b1 CL |
1060 | /* |
1061 | * 3.3.9 MKDIR3args | |
1062 | * | |
1063 | * struct MKDIR3args { | |
1064 | * diropargs3 where; | |
1065 | * sattr3 attributes; | |
1066 | * }; | |
1067 | */ | |
9f06c719 CL |
1068 | static void nfs3_xdr_enc_mkdir3args(struct rpc_rqst *req, |
1069 | struct xdr_stream *xdr, | |
1070 | const struct nfs3_mkdirargs *args) | |
d9c407b1 | 1071 | { |
9f06c719 CL |
1072 | encode_diropargs3(xdr, args->fh, args->name, args->len); |
1073 | encode_sattr3(xdr, args->sattr); | |
d9c407b1 CL |
1074 | } |
1075 | ||
d9c407b1 CL |
1076 | /* |
1077 | * 3.3.10 SYMLINK3args | |
1078 | * | |
1079 | * struct symlinkdata3 { | |
1080 | * sattr3 symlink_attributes; | |
1081 | * nfspath3 symlink_data; | |
1082 | * }; | |
1083 | * | |
1084 | * struct SYMLINK3args { | |
1085 | * diropargs3 where; | |
1086 | * symlinkdata3 symlink; | |
1087 | * }; | |
1088 | */ | |
1089 | static void encode_symlinkdata3(struct xdr_stream *xdr, | |
1090 | const struct nfs3_symlinkargs *args) | |
1091 | { | |
1092 | encode_sattr3(xdr, args->sattr); | |
1093 | encode_nfspath3(xdr, args->pages, args->pathlen); | |
1094 | } | |
1095 | ||
9f06c719 CL |
1096 | static void nfs3_xdr_enc_symlink3args(struct rpc_rqst *req, |
1097 | struct xdr_stream *xdr, | |
1098 | const struct nfs3_symlinkargs *args) | |
d9c407b1 | 1099 | { |
9f06c719 CL |
1100 | encode_diropargs3(xdr, args->fromfh, args->fromname, args->fromlen); |
1101 | encode_symlinkdata3(xdr, args); | |
d9c407b1 CL |
1102 | } |
1103 | ||
d9c407b1 CL |
1104 | /* |
1105 | * 3.3.11 MKNOD3args | |
1106 | * | |
1107 | * struct devicedata3 { | |
1108 | * sattr3 dev_attributes; | |
1109 | * specdata3 spec; | |
1110 | * }; | |
1111 | * | |
1112 | * union mknoddata3 switch (ftype3 type) { | |
1113 | * case NF3CHR: | |
1114 | * case NF3BLK: | |
1115 | * devicedata3 device; | |
1116 | * case NF3SOCK: | |
1117 | * case NF3FIFO: | |
1118 | * sattr3 pipe_attributes; | |
1119 | * default: | |
1120 | * void; | |
1121 | * }; | |
1122 | * | |
1123 | * struct MKNOD3args { | |
1124 | * diropargs3 where; | |
1125 | * mknoddata3 what; | |
1126 | * }; | |
1127 | */ | |
1128 | static void encode_devicedata3(struct xdr_stream *xdr, | |
1129 | const struct nfs3_mknodargs *args) | |
1130 | { | |
1131 | encode_sattr3(xdr, args->sattr); | |
1132 | encode_specdata3(xdr, args->rdev); | |
1133 | } | |
1134 | ||
1135 | static void encode_mknoddata3(struct xdr_stream *xdr, | |
1136 | const struct nfs3_mknodargs *args) | |
1137 | { | |
1138 | encode_ftype3(xdr, args->type); | |
1139 | switch (args->type) { | |
1140 | case NF3CHR: | |
1141 | case NF3BLK: | |
1142 | encode_devicedata3(xdr, args); | |
1143 | break; | |
1144 | case NF3SOCK: | |
1145 | case NF3FIFO: | |
1146 | encode_sattr3(xdr, args->sattr); | |
1147 | break; | |
1148 | case NF3REG: | |
1149 | case NF3DIR: | |
1150 | break; | |
1151 | default: | |
1152 | BUG(); | |
1153 | } | |
1154 | } | |
1155 | ||
9f06c719 CL |
1156 | static void nfs3_xdr_enc_mknod3args(struct rpc_rqst *req, |
1157 | struct xdr_stream *xdr, | |
1158 | const struct nfs3_mknodargs *args) | |
d9c407b1 | 1159 | { |
9f06c719 CL |
1160 | encode_diropargs3(xdr, args->fh, args->name, args->len); |
1161 | encode_mknoddata3(xdr, args); | |
d9c407b1 CL |
1162 | } |
1163 | ||
1164 | /* | |
1165 | * 3.3.12 REMOVE3args | |
1166 | * | |
1167 | * struct REMOVE3args { | |
1168 | * diropargs3 object; | |
1169 | * }; | |
1170 | */ | |
9f06c719 CL |
1171 | static void nfs3_xdr_enc_remove3args(struct rpc_rqst *req, |
1172 | struct xdr_stream *xdr, | |
1173 | const struct nfs_removeargs *args) | |
d9c407b1 | 1174 | { |
9f06c719 | 1175 | encode_diropargs3(xdr, args->fh, args->name.name, args->name.len); |
d9c407b1 CL |
1176 | } |
1177 | ||
d9c407b1 CL |
1178 | /* |
1179 | * 3.3.14 RENAME3args | |
1180 | * | |
1181 | * struct RENAME3args { | |
1182 | * diropargs3 from; | |
1183 | * diropargs3 to; | |
1184 | * }; | |
1185 | */ | |
9f06c719 CL |
1186 | static void nfs3_xdr_enc_rename3args(struct rpc_rqst *req, |
1187 | struct xdr_stream *xdr, | |
1188 | const struct nfs_renameargs *args) | |
d9c407b1 CL |
1189 | { |
1190 | const struct qstr *old = args->old_name; | |
1191 | const struct qstr *new = args->new_name; | |
d9c407b1 | 1192 | |
9f06c719 CL |
1193 | encode_diropargs3(xdr, args->old_dir, old->name, old->len); |
1194 | encode_diropargs3(xdr, args->new_dir, new->name, new->len); | |
d9c407b1 CL |
1195 | } |
1196 | ||
d9c407b1 CL |
1197 | /* |
1198 | * 3.3.15 LINK3args | |
1199 | * | |
1200 | * struct LINK3args { | |
1201 | * nfs_fh3 file; | |
1202 | * diropargs3 link; | |
1203 | * }; | |
1204 | */ | |
9f06c719 CL |
1205 | static void nfs3_xdr_enc_link3args(struct rpc_rqst *req, |
1206 | struct xdr_stream *xdr, | |
1207 | const struct nfs3_linkargs *args) | |
d9c407b1 | 1208 | { |
9f06c719 CL |
1209 | encode_nfs_fh3(xdr, args->fromfh); |
1210 | encode_diropargs3(xdr, args->tofh, args->toname, args->tolen); | |
d9c407b1 CL |
1211 | } |
1212 | ||
d9c407b1 CL |
1213 | /* |
1214 | * 3.3.16 READDIR3args | |
1215 | * | |
1216 | * struct READDIR3args { | |
1217 | * nfs_fh3 dir; | |
1218 | * cookie3 cookie; | |
1219 | * cookieverf3 cookieverf; | |
1220 | * count3 count; | |
1221 | * }; | |
1222 | */ | |
1223 | static void encode_readdir3args(struct xdr_stream *xdr, | |
1224 | const struct nfs3_readdirargs *args) | |
1225 | { | |
1226 | __be32 *p; | |
1227 | ||
1228 | encode_nfs_fh3(xdr, args->fh); | |
1229 | ||
1230 | p = xdr_reserve_space(xdr, 8 + NFS3_COOKIEVERFSIZE + 4); | |
1231 | p = xdr_encode_cookie3(p, args->cookie); | |
1232 | p = xdr_encode_cookieverf3(p, args->verf); | |
1233 | *p = cpu_to_be32(args->count); | |
1234 | } | |
1235 | ||
9f06c719 CL |
1236 | static void nfs3_xdr_enc_readdir3args(struct rpc_rqst *req, |
1237 | struct xdr_stream *xdr, | |
1238 | const struct nfs3_readdirargs *args) | |
d9c407b1 | 1239 | { |
9f06c719 | 1240 | encode_readdir3args(xdr, args); |
d9c407b1 CL |
1241 | prepare_reply_buffer(req, args->pages, 0, |
1242 | args->count, NFS3_readdirres_sz); | |
d9c407b1 CL |
1243 | } |
1244 | ||
1245 | /* | |
1246 | * 3.3.17 READDIRPLUS3args | |
1247 | * | |
1248 | * struct READDIRPLUS3args { | |
1249 | * nfs_fh3 dir; | |
1250 | * cookie3 cookie; | |
1251 | * cookieverf3 cookieverf; | |
1252 | * count3 dircount; | |
1253 | * count3 maxcount; | |
1254 | * }; | |
1255 | */ | |
1256 | static void encode_readdirplus3args(struct xdr_stream *xdr, | |
1257 | const struct nfs3_readdirargs *args) | |
1258 | { | |
1259 | __be32 *p; | |
1260 | ||
1261 | encode_nfs_fh3(xdr, args->fh); | |
1262 | ||
1263 | p = xdr_reserve_space(xdr, 8 + NFS3_COOKIEVERFSIZE + 4 + 4); | |
1264 | p = xdr_encode_cookie3(p, args->cookie); | |
1265 | p = xdr_encode_cookieverf3(p, args->verf); | |
1266 | ||
1267 | /* | |
1268 | * readdirplus: need dircount + buffer size. | |
1269 | * We just make sure we make dircount big enough | |
1270 | */ | |
1271 | *p++ = cpu_to_be32(args->count >> 3); | |
1272 | ||
1273 | *p = cpu_to_be32(args->count); | |
1274 | } | |
1275 | ||
9f06c719 CL |
1276 | static void nfs3_xdr_enc_readdirplus3args(struct rpc_rqst *req, |
1277 | struct xdr_stream *xdr, | |
1278 | const struct nfs3_readdirargs *args) | |
d9c407b1 | 1279 | { |
9f06c719 | 1280 | encode_readdirplus3args(xdr, args); |
d9c407b1 CL |
1281 | prepare_reply_buffer(req, args->pages, 0, |
1282 | args->count, NFS3_readdirres_sz); | |
d9c407b1 CL |
1283 | } |
1284 | ||
d9c407b1 CL |
1285 | /* |
1286 | * 3.3.21 COMMIT3args | |
1287 | * | |
1288 | * struct COMMIT3args { | |
1289 | * nfs_fh3 file; | |
1290 | * offset3 offset; | |
1291 | * count3 count; | |
1292 | * }; | |
1293 | */ | |
1294 | static void encode_commit3args(struct xdr_stream *xdr, | |
0b7c0153 | 1295 | const struct nfs_commitargs *args) |
d9c407b1 CL |
1296 | { |
1297 | __be32 *p; | |
1298 | ||
1299 | encode_nfs_fh3(xdr, args->fh); | |
1300 | ||
1301 | p = xdr_reserve_space(xdr, 8 + 4); | |
1302 | p = xdr_encode_hyper(p, args->offset); | |
1303 | *p = cpu_to_be32(args->count); | |
1304 | } | |
1305 | ||
9f06c719 CL |
1306 | static void nfs3_xdr_enc_commit3args(struct rpc_rqst *req, |
1307 | struct xdr_stream *xdr, | |
0b7c0153 | 1308 | const struct nfs_commitargs *args) |
d9c407b1 | 1309 | { |
9f06c719 | 1310 | encode_commit3args(xdr, args); |
d9c407b1 CL |
1311 | } |
1312 | ||
b7fa0554 | 1313 | #ifdef CONFIG_NFS_V3_ACL |
b7fa0554 | 1314 | |
9f06c719 CL |
1315 | static void nfs3_xdr_enc_getacl3args(struct rpc_rqst *req, |
1316 | struct xdr_stream *xdr, | |
1317 | const struct nfs3_getaclargs *args) | |
d9c407b1 | 1318 | { |
9f06c719 CL |
1319 | encode_nfs_fh3(xdr, args->fh); |
1320 | encode_uint32(xdr, args->mask); | |
d9c407b1 CL |
1321 | if (args->mask & (NFS_ACL | NFS_DFACL)) |
1322 | prepare_reply_buffer(req, args->pages, 0, | |
1323 | NFSACL_MAXPAGES << PAGE_SHIFT, | |
1324 | ACL3_getaclres_sz); | |
d9c407b1 CL |
1325 | } |
1326 | ||
9f06c719 CL |
1327 | static void nfs3_xdr_enc_setacl3args(struct rpc_rqst *req, |
1328 | struct xdr_stream *xdr, | |
1329 | const struct nfs3_setaclargs *args) | |
d9c407b1 | 1330 | { |
d9c407b1 CL |
1331 | unsigned int base; |
1332 | int error; | |
1333 | ||
9f06c719 CL |
1334 | encode_nfs_fh3(xdr, NFS_FH(args->inode)); |
1335 | encode_uint32(xdr, args->mask); | |
ee5dc773 CL |
1336 | |
1337 | base = req->rq_slen; | |
d9c407b1 | 1338 | if (args->npages != 0) |
9f06c719 | 1339 | xdr_write_pages(xdr, args->pages, 0, args->len); |
ee5dc773 CL |
1340 | else |
1341 | xdr_reserve_space(xdr, NFS_ACL_INLINE_BUFSIZE); | |
d9c407b1 | 1342 | |
9f06c719 | 1343 | error = nfsacl_encode(xdr->buf, base, args->inode, |
d9c407b1 CL |
1344 | (args->mask & NFS_ACL) ? |
1345 | args->acl_access : NULL, 1, 0); | |
1346 | BUG_ON(error < 0); | |
9f06c719 | 1347 | error = nfsacl_encode(xdr->buf, base + error, args->inode, |
d9c407b1 CL |
1348 | (args->mask & NFS_DFACL) ? |
1349 | args->acl_default : NULL, 1, | |
1350 | NFS_ACL_DEFAULT); | |
1351 | BUG_ON(error < 0); | |
d9c407b1 CL |
1352 | } |
1353 | ||
b7fa0554 AG |
1354 | #endif /* CONFIG_NFS_V3_ACL */ |
1355 | ||
1da177e4 | 1356 | /* |
b2cdd9c9 CL |
1357 | * NFSv3 XDR decode functions |
1358 | * | |
1359 | * NFSv3 result types are defined in section 3.3 of RFC 1813: | |
1360 | * "NFS Version 3 Protocol Specification". | |
1da177e4 | 1361 | */ |
1da177e4 LT |
1362 | |
1363 | /* | |
e4f93234 CL |
1364 | * 3.3.1 GETATTR3res |
1365 | * | |
1366 | * struct GETATTR3resok { | |
1367 | * fattr3 obj_attributes; | |
1368 | * }; | |
1369 | * | |
1370 | * union GETATTR3res switch (nfsstat3 status) { | |
1371 | * case NFS3_OK: | |
1372 | * GETATTR3resok resok; | |
1373 | * default: | |
1374 | * void; | |
1375 | * }; | |
1da177e4 | 1376 | */ |
bf269551 CL |
1377 | static int nfs3_xdr_dec_getattr3res(struct rpc_rqst *req, |
1378 | struct xdr_stream *xdr, | |
e4f93234 | 1379 | struct nfs_fattr *result) |
1da177e4 | 1380 | { |
e4f93234 CL |
1381 | enum nfs_stat status; |
1382 | int error; | |
1383 | ||
bf269551 | 1384 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1385 | if (unlikely(error)) |
1386 | goto out; | |
1387 | if (status != NFS3_OK) | |
1388 | goto out_default; | |
bf269551 | 1389 | error = decode_fattr3(xdr, result); |
e4f93234 CL |
1390 | out: |
1391 | return error; | |
1392 | out_default: | |
5e7e5a0d | 1393 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1394 | } |
1395 | ||
e4f93234 CL |
1396 | /* |
1397 | * 3.3.2 SETATTR3res | |
1398 | * | |
1399 | * struct SETATTR3resok { | |
1400 | * wcc_data obj_wcc; | |
1401 | * }; | |
1402 | * | |
1403 | * struct SETATTR3resfail { | |
1404 | * wcc_data obj_wcc; | |
1405 | * }; | |
1406 | * | |
1407 | * union SETATTR3res switch (nfsstat3 status) { | |
1408 | * case NFS3_OK: | |
1409 | * SETATTR3resok resok; | |
1410 | * default: | |
1411 | * SETATTR3resfail resfail; | |
1412 | * }; | |
1413 | */ | |
bf269551 CL |
1414 | static int nfs3_xdr_dec_setattr3res(struct rpc_rqst *req, |
1415 | struct xdr_stream *xdr, | |
e4f93234 CL |
1416 | struct nfs_fattr *result) |
1417 | { | |
e4f93234 CL |
1418 | enum nfs_stat status; |
1419 | int error; | |
1420 | ||
bf269551 | 1421 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1422 | if (unlikely(error)) |
1423 | goto out; | |
bf269551 | 1424 | error = decode_wcc_data(xdr, result); |
e4f93234 CL |
1425 | if (unlikely(error)) |
1426 | goto out; | |
1427 | if (status != NFS3_OK) | |
1428 | goto out_status; | |
1429 | out: | |
1430 | return error; | |
1431 | out_status: | |
5e7e5a0d | 1432 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1433 | } |
1434 | ||
e4f93234 CL |
1435 | /* |
1436 | * 3.3.3 LOOKUP3res | |
1437 | * | |
1438 | * struct LOOKUP3resok { | |
1439 | * nfs_fh3 object; | |
1440 | * post_op_attr obj_attributes; | |
1441 | * post_op_attr dir_attributes; | |
1442 | * }; | |
1443 | * | |
1444 | * struct LOOKUP3resfail { | |
1445 | * post_op_attr dir_attributes; | |
1446 | * }; | |
1447 | * | |
1448 | * union LOOKUP3res switch (nfsstat3 status) { | |
1449 | * case NFS3_OK: | |
1450 | * LOOKUP3resok resok; | |
1451 | * default: | |
1452 | * LOOKUP3resfail resfail; | |
1453 | * }; | |
1454 | */ | |
bf269551 CL |
1455 | static int nfs3_xdr_dec_lookup3res(struct rpc_rqst *req, |
1456 | struct xdr_stream *xdr, | |
e4f93234 CL |
1457 | struct nfs3_diropres *result) |
1458 | { | |
e4f93234 CL |
1459 | enum nfs_stat status; |
1460 | int error; | |
1461 | ||
bf269551 | 1462 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1463 | if (unlikely(error)) |
1464 | goto out; | |
1465 | if (status != NFS3_OK) | |
1466 | goto out_default; | |
bf269551 | 1467 | error = decode_nfs_fh3(xdr, result->fh); |
e4f93234 CL |
1468 | if (unlikely(error)) |
1469 | goto out; | |
bf269551 | 1470 | error = decode_post_op_attr(xdr, result->fattr); |
e4f93234 CL |
1471 | if (unlikely(error)) |
1472 | goto out; | |
bf269551 | 1473 | error = decode_post_op_attr(xdr, result->dir_attr); |
e4f93234 CL |
1474 | out: |
1475 | return error; | |
1476 | out_default: | |
bf269551 | 1477 | error = decode_post_op_attr(xdr, result->dir_attr); |
e4f93234 CL |
1478 | if (unlikely(error)) |
1479 | goto out; | |
5e7e5a0d | 1480 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1481 | } |
1482 | ||
e4f93234 CL |
1483 | /* |
1484 | * 3.3.4 ACCESS3res | |
1485 | * | |
1486 | * struct ACCESS3resok { | |
1487 | * post_op_attr obj_attributes; | |
1488 | * uint32 access; | |
1489 | * }; | |
1490 | * | |
1491 | * struct ACCESS3resfail { | |
1492 | * post_op_attr obj_attributes; | |
1493 | * }; | |
1494 | * | |
1495 | * union ACCESS3res switch (nfsstat3 status) { | |
1496 | * case NFS3_OK: | |
1497 | * ACCESS3resok resok; | |
1498 | * default: | |
1499 | * ACCESS3resfail resfail; | |
1500 | * }; | |
1501 | */ | |
bf269551 CL |
1502 | static int nfs3_xdr_dec_access3res(struct rpc_rqst *req, |
1503 | struct xdr_stream *xdr, | |
e4f93234 CL |
1504 | struct nfs3_accessres *result) |
1505 | { | |
e4f93234 CL |
1506 | enum nfs_stat status; |
1507 | int error; | |
1508 | ||
bf269551 | 1509 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1510 | if (unlikely(error)) |
1511 | goto out; | |
bf269551 | 1512 | error = decode_post_op_attr(xdr, result->fattr); |
e4f93234 CL |
1513 | if (unlikely(error)) |
1514 | goto out; | |
1515 | if (status != NFS3_OK) | |
1516 | goto out_default; | |
bf269551 | 1517 | error = decode_uint32(xdr, &result->access); |
e4f93234 CL |
1518 | out: |
1519 | return error; | |
1520 | out_default: | |
5e7e5a0d | 1521 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1522 | } |
1523 | ||
e4f93234 CL |
1524 | /* |
1525 | * 3.3.5 READLINK3res | |
1526 | * | |
1527 | * struct READLINK3resok { | |
1528 | * post_op_attr symlink_attributes; | |
1529 | * nfspath3 data; | |
1530 | * }; | |
1531 | * | |
1532 | * struct READLINK3resfail { | |
1533 | * post_op_attr symlink_attributes; | |
1534 | * }; | |
1535 | * | |
1536 | * union READLINK3res switch (nfsstat3 status) { | |
1537 | * case NFS3_OK: | |
1538 | * READLINK3resok resok; | |
1539 | * default: | |
1540 | * READLINK3resfail resfail; | |
1541 | * }; | |
1542 | */ | |
bf269551 CL |
1543 | static int nfs3_xdr_dec_readlink3res(struct rpc_rqst *req, |
1544 | struct xdr_stream *xdr, | |
e4f93234 CL |
1545 | struct nfs_fattr *result) |
1546 | { | |
e4f93234 CL |
1547 | enum nfs_stat status; |
1548 | int error; | |
1549 | ||
bf269551 | 1550 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1551 | if (unlikely(error)) |
1552 | goto out; | |
bf269551 | 1553 | error = decode_post_op_attr(xdr, result); |
e4f93234 CL |
1554 | if (unlikely(error)) |
1555 | goto out; | |
1556 | if (status != NFS3_OK) | |
1557 | goto out_default; | |
bf269551 | 1558 | error = decode_nfspath3(xdr); |
e4f93234 CL |
1559 | out: |
1560 | return error; | |
1561 | out_default: | |
5e7e5a0d | 1562 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1563 | } |
1564 | ||
e4f93234 CL |
1565 | /* |
1566 | * 3.3.6 READ3res | |
1567 | * | |
1568 | * struct READ3resok { | |
1569 | * post_op_attr file_attributes; | |
1570 | * count3 count; | |
1571 | * bool eof; | |
1572 | * opaque data<>; | |
1573 | * }; | |
1574 | * | |
1575 | * struct READ3resfail { | |
1576 | * post_op_attr file_attributes; | |
1577 | * }; | |
1578 | * | |
1579 | * union READ3res switch (nfsstat3 status) { | |
1580 | * case NFS3_OK: | |
1581 | * READ3resok resok; | |
1582 | * default: | |
1583 | * READ3resfail resfail; | |
1584 | * }; | |
1585 | */ | |
1586 | static int decode_read3resok(struct xdr_stream *xdr, | |
1587 | struct nfs_readres *result) | |
1588 | { | |
1589 | u32 eof, count, ocount, recvd; | |
1590 | size_t hdrlen; | |
1591 | __be32 *p; | |
1592 | ||
1593 | p = xdr_inline_decode(xdr, 4 + 4 + 4); | |
1594 | if (unlikely(p == NULL)) | |
1595 | goto out_overflow; | |
1596 | count = be32_to_cpup(p++); | |
1597 | eof = be32_to_cpup(p++); | |
1598 | ocount = be32_to_cpup(p++); | |
1599 | if (unlikely(ocount != count)) | |
1600 | goto out_mismatch; | |
1601 | hdrlen = (u8 *)xdr->p - (u8 *)xdr->iov->iov_base; | |
1602 | recvd = xdr->buf->len - hdrlen; | |
1603 | if (unlikely(count > recvd)) | |
1604 | goto out_cheating; | |
1605 | ||
1606 | out: | |
1607 | xdr_read_pages(xdr, count); | |
1608 | result->eof = eof; | |
1609 | result->count = count; | |
1610 | return count; | |
1611 | out_mismatch: | |
1612 | dprintk("NFS: READ count doesn't match length of opaque: " | |
1613 | "count %u != ocount %u\n", count, ocount); | |
1614 | return -EIO; | |
1615 | out_cheating: | |
1616 | dprintk("NFS: server cheating in read result: " | |
1617 | "count %u > recvd %u\n", count, recvd); | |
1618 | count = recvd; | |
1619 | eof = 0; | |
1620 | goto out; | |
1621 | out_overflow: | |
1622 | print_overflow_msg(__func__, xdr); | |
1623 | return -EIO; | |
1624 | } | |
1625 | ||
bf269551 | 1626 | static int nfs3_xdr_dec_read3res(struct rpc_rqst *req, struct xdr_stream *xdr, |
e4f93234 CL |
1627 | struct nfs_readres *result) |
1628 | { | |
e4f93234 CL |
1629 | enum nfs_stat status; |
1630 | int error; | |
1631 | ||
bf269551 | 1632 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1633 | if (unlikely(error)) |
1634 | goto out; | |
bf269551 | 1635 | error = decode_post_op_attr(xdr, result->fattr); |
e4f93234 CL |
1636 | if (unlikely(error)) |
1637 | goto out; | |
1638 | if (status != NFS3_OK) | |
1639 | goto out_status; | |
bf269551 | 1640 | error = decode_read3resok(xdr, result); |
e4f93234 CL |
1641 | out: |
1642 | return error; | |
1643 | out_status: | |
5e7e5a0d | 1644 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1645 | } |
1646 | ||
e4f93234 CL |
1647 | /* |
1648 | * 3.3.7 WRITE3res | |
1649 | * | |
1650 | * enum stable_how { | |
1651 | * UNSTABLE = 0, | |
1652 | * DATA_SYNC = 1, | |
1653 | * FILE_SYNC = 2 | |
1654 | * }; | |
1655 | * | |
1656 | * struct WRITE3resok { | |
1657 | * wcc_data file_wcc; | |
1658 | * count3 count; | |
1659 | * stable_how committed; | |
1660 | * writeverf3 verf; | |
1661 | * }; | |
1662 | * | |
1663 | * struct WRITE3resfail { | |
1664 | * wcc_data file_wcc; | |
1665 | * }; | |
1666 | * | |
1667 | * union WRITE3res switch (nfsstat3 status) { | |
1668 | * case NFS3_OK: | |
1669 | * WRITE3resok resok; | |
1670 | * default: | |
1671 | * WRITE3resfail resfail; | |
1672 | * }; | |
1673 | */ | |
1674 | static int decode_write3resok(struct xdr_stream *xdr, | |
1675 | struct nfs_writeres *result) | |
1676 | { | |
1677 | __be32 *p; | |
1678 | ||
1679 | p = xdr_inline_decode(xdr, 4 + 4 + NFS3_WRITEVERFSIZE); | |
1680 | if (unlikely(p == NULL)) | |
1681 | goto out_overflow; | |
1682 | result->count = be32_to_cpup(p++); | |
1683 | result->verf->committed = be32_to_cpup(p++); | |
1684 | if (unlikely(result->verf->committed > NFS_FILE_SYNC)) | |
1685 | goto out_badvalue; | |
1686 | memcpy(result->verf->verifier, p, NFS3_WRITEVERFSIZE); | |
1687 | return result->count; | |
1688 | out_badvalue: | |
1689 | dprintk("NFS: bad stable_how value: %u\n", result->verf->committed); | |
1690 | return -EIO; | |
1691 | out_overflow: | |
1692 | print_overflow_msg(__func__, xdr); | |
1693 | return -EIO; | |
1694 | } | |
1695 | ||
bf269551 | 1696 | static int nfs3_xdr_dec_write3res(struct rpc_rqst *req, struct xdr_stream *xdr, |
e4f93234 CL |
1697 | struct nfs_writeres *result) |
1698 | { | |
e4f93234 CL |
1699 | enum nfs_stat status; |
1700 | int error; | |
1701 | ||
bf269551 | 1702 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1703 | if (unlikely(error)) |
1704 | goto out; | |
bf269551 | 1705 | error = decode_wcc_data(xdr, result->fattr); |
e4f93234 CL |
1706 | if (unlikely(error)) |
1707 | goto out; | |
1708 | if (status != NFS3_OK) | |
1709 | goto out_status; | |
bf269551 | 1710 | error = decode_write3resok(xdr, result); |
e4f93234 CL |
1711 | out: |
1712 | return error; | |
1713 | out_status: | |
5e7e5a0d | 1714 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1715 | } |
1716 | ||
e4f93234 CL |
1717 | /* |
1718 | * 3.3.8 CREATE3res | |
1719 | * | |
1720 | * struct CREATE3resok { | |
1721 | * post_op_fh3 obj; | |
1722 | * post_op_attr obj_attributes; | |
1723 | * wcc_data dir_wcc; | |
1724 | * }; | |
1725 | * | |
1726 | * struct CREATE3resfail { | |
1727 | * wcc_data dir_wcc; | |
1728 | * }; | |
1729 | * | |
1730 | * union CREATE3res switch (nfsstat3 status) { | |
1731 | * case NFS3_OK: | |
1732 | * CREATE3resok resok; | |
1733 | * default: | |
1734 | * CREATE3resfail resfail; | |
1735 | * }; | |
1736 | */ | |
1737 | static int decode_create3resok(struct xdr_stream *xdr, | |
1738 | struct nfs3_diropres *result) | |
1739 | { | |
1740 | int error; | |
1741 | ||
1742 | error = decode_post_op_fh3(xdr, result->fh); | |
1743 | if (unlikely(error)) | |
1744 | goto out; | |
1745 | error = decode_post_op_attr(xdr, result->fattr); | |
1746 | if (unlikely(error)) | |
1747 | goto out; | |
1748 | /* The server isn't required to return a file handle. | |
1749 | * If it didn't, force the client to perform a LOOKUP | |
1750 | * to determine the correct file handle and attribute | |
1751 | * values for the new object. */ | |
1752 | if (result->fh->size == 0) | |
1753 | result->fattr->valid = 0; | |
1754 | error = decode_wcc_data(xdr, result->dir_attr); | |
1755 | out: | |
1756 | return error; | |
1757 | } | |
1758 | ||
bf269551 CL |
1759 | static int nfs3_xdr_dec_create3res(struct rpc_rqst *req, |
1760 | struct xdr_stream *xdr, | |
e4f93234 CL |
1761 | struct nfs3_diropres *result) |
1762 | { | |
e4f93234 CL |
1763 | enum nfs_stat status; |
1764 | int error; | |
1765 | ||
bf269551 | 1766 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1767 | if (unlikely(error)) |
1768 | goto out; | |
1769 | if (status != NFS3_OK) | |
1770 | goto out_default; | |
bf269551 | 1771 | error = decode_create3resok(xdr, result); |
e4f93234 CL |
1772 | out: |
1773 | return error; | |
1774 | out_default: | |
bf269551 | 1775 | error = decode_wcc_data(xdr, result->dir_attr); |
e4f93234 CL |
1776 | if (unlikely(error)) |
1777 | goto out; | |
5e7e5a0d | 1778 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1779 | } |
1780 | ||
1781 | /* | |
1782 | * 3.3.12 REMOVE3res | |
1783 | * | |
1784 | * struct REMOVE3resok { | |
1785 | * wcc_data dir_wcc; | |
1786 | * }; | |
1787 | * | |
1788 | * struct REMOVE3resfail { | |
1789 | * wcc_data dir_wcc; | |
1790 | * }; | |
1791 | * | |
1792 | * union REMOVE3res switch (nfsstat3 status) { | |
1793 | * case NFS3_OK: | |
1794 | * REMOVE3resok resok; | |
1795 | * default: | |
1796 | * REMOVE3resfail resfail; | |
1797 | * }; | |
1798 | */ | |
bf269551 CL |
1799 | static int nfs3_xdr_dec_remove3res(struct rpc_rqst *req, |
1800 | struct xdr_stream *xdr, | |
e4f93234 CL |
1801 | struct nfs_removeres *result) |
1802 | { | |
e4f93234 CL |
1803 | enum nfs_stat status; |
1804 | int error; | |
1805 | ||
bf269551 | 1806 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1807 | if (unlikely(error)) |
1808 | goto out; | |
bf269551 | 1809 | error = decode_wcc_data(xdr, result->dir_attr); |
e4f93234 CL |
1810 | if (unlikely(error)) |
1811 | goto out; | |
1812 | if (status != NFS3_OK) | |
1813 | goto out_status; | |
1814 | out: | |
1815 | return error; | |
1816 | out_status: | |
5e7e5a0d | 1817 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1818 | } |
1819 | ||
e4f93234 CL |
1820 | /* |
1821 | * 3.3.14 RENAME3res | |
1822 | * | |
1823 | * struct RENAME3resok { | |
1824 | * wcc_data fromdir_wcc; | |
1825 | * wcc_data todir_wcc; | |
1826 | * }; | |
1827 | * | |
1828 | * struct RENAME3resfail { | |
1829 | * wcc_data fromdir_wcc; | |
1830 | * wcc_data todir_wcc; | |
1831 | * }; | |
1832 | * | |
1833 | * union RENAME3res switch (nfsstat3 status) { | |
1834 | * case NFS3_OK: | |
1835 | * RENAME3resok resok; | |
1836 | * default: | |
1837 | * RENAME3resfail resfail; | |
1838 | * }; | |
1839 | */ | |
bf269551 CL |
1840 | static int nfs3_xdr_dec_rename3res(struct rpc_rqst *req, |
1841 | struct xdr_stream *xdr, | |
e4f93234 CL |
1842 | struct nfs_renameres *result) |
1843 | { | |
e4f93234 CL |
1844 | enum nfs_stat status; |
1845 | int error; | |
1846 | ||
bf269551 | 1847 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1848 | if (unlikely(error)) |
1849 | goto out; | |
bf269551 | 1850 | error = decode_wcc_data(xdr, result->old_fattr); |
e4f93234 CL |
1851 | if (unlikely(error)) |
1852 | goto out; | |
bf269551 | 1853 | error = decode_wcc_data(xdr, result->new_fattr); |
e4f93234 CL |
1854 | if (unlikely(error)) |
1855 | goto out; | |
1856 | if (status != NFS3_OK) | |
1857 | goto out_status; | |
1858 | out: | |
1859 | return error; | |
1860 | out_status: | |
5e7e5a0d | 1861 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1862 | } |
1863 | ||
e4f93234 CL |
1864 | /* |
1865 | * 3.3.15 LINK3res | |
1866 | * | |
1867 | * struct LINK3resok { | |
1868 | * post_op_attr file_attributes; | |
1869 | * wcc_data linkdir_wcc; | |
1870 | * }; | |
1871 | * | |
1872 | * struct LINK3resfail { | |
1873 | * post_op_attr file_attributes; | |
1874 | * wcc_data linkdir_wcc; | |
1875 | * }; | |
1876 | * | |
1877 | * union LINK3res switch (nfsstat3 status) { | |
1878 | * case NFS3_OK: | |
1879 | * LINK3resok resok; | |
1880 | * default: | |
1881 | * LINK3resfail resfail; | |
1882 | * }; | |
1883 | */ | |
bf269551 | 1884 | static int nfs3_xdr_dec_link3res(struct rpc_rqst *req, struct xdr_stream *xdr, |
e4f93234 CL |
1885 | struct nfs3_linkres *result) |
1886 | { | |
e4f93234 CL |
1887 | enum nfs_stat status; |
1888 | int error; | |
1889 | ||
bf269551 | 1890 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1891 | if (unlikely(error)) |
1892 | goto out; | |
bf269551 | 1893 | error = decode_post_op_attr(xdr, result->fattr); |
e4f93234 CL |
1894 | if (unlikely(error)) |
1895 | goto out; | |
bf269551 | 1896 | error = decode_wcc_data(xdr, result->dir_attr); |
e4f93234 CL |
1897 | if (unlikely(error)) |
1898 | goto out; | |
1899 | if (status != NFS3_OK) | |
1900 | goto out_status; | |
1901 | out: | |
1902 | return error; | |
1903 | out_status: | |
5e7e5a0d | 1904 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1905 | } |
1906 | ||
1907 | /** | |
1908 | * nfs3_decode_dirent - Decode a single NFSv3 directory entry stored in | |
1909 | * the local page cache | |
1910 | * @xdr: XDR stream where entry resides | |
1911 | * @entry: buffer to fill in with entry data | |
e4f93234 CL |
1912 | * @plus: boolean indicating whether this should be a readdirplus entry |
1913 | * | |
573c4e1e CL |
1914 | * Returns zero if successful, otherwise a negative errno value is |
1915 | * returned. | |
e4f93234 CL |
1916 | * |
1917 | * This function is not invoked during READDIR reply decoding, but | |
1918 | * rather whenever an application invokes the getdents(2) system call | |
1919 | * on a directory already in our cache. | |
1920 | * | |
1921 | * 3.3.16 entry3 | |
1922 | * | |
1923 | * struct entry3 { | |
1924 | * fileid3 fileid; | |
1925 | * filename3 name; | |
1926 | * cookie3 cookie; | |
1927 | * fhandle3 filehandle; | |
1928 | * post_op_attr3 attributes; | |
1929 | * entry3 *nextentry; | |
1930 | * }; | |
1931 | * | |
1932 | * 3.3.17 entryplus3 | |
1933 | * struct entryplus3 { | |
1934 | * fileid3 fileid; | |
1935 | * filename3 name; | |
1936 | * cookie3 cookie; | |
1937 | * post_op_attr name_attributes; | |
1938 | * post_op_fh3 name_handle; | |
1939 | * entryplus3 *nextentry; | |
1940 | * }; | |
1941 | */ | |
573c4e1e CL |
1942 | int nfs3_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, |
1943 | int plus) | |
e4f93234 CL |
1944 | { |
1945 | struct nfs_entry old = *entry; | |
1946 | __be32 *p; | |
1947 | int error; | |
1948 | ||
1949 | p = xdr_inline_decode(xdr, 4); | |
1950 | if (unlikely(p == NULL)) | |
1951 | goto out_overflow; | |
1952 | if (*p == xdr_zero) { | |
1953 | p = xdr_inline_decode(xdr, 4); | |
1954 | if (unlikely(p == NULL)) | |
1955 | goto out_overflow; | |
1956 | if (*p == xdr_zero) | |
573c4e1e | 1957 | return -EAGAIN; |
e4f93234 | 1958 | entry->eof = 1; |
573c4e1e | 1959 | return -EBADCOOKIE; |
e4f93234 CL |
1960 | } |
1961 | ||
1962 | error = decode_fileid3(xdr, &entry->ino); | |
1963 | if (unlikely(error)) | |
573c4e1e | 1964 | return error; |
e4f93234 CL |
1965 | |
1966 | error = decode_inline_filename3(xdr, &entry->name, &entry->len); | |
1967 | if (unlikely(error)) | |
573c4e1e | 1968 | return error; |
e4f93234 CL |
1969 | |
1970 | entry->prev_cookie = entry->cookie; | |
1971 | error = decode_cookie3(xdr, &entry->cookie); | |
1972 | if (unlikely(error)) | |
573c4e1e | 1973 | return error; |
e4f93234 CL |
1974 | |
1975 | entry->d_type = DT_UNKNOWN; | |
1976 | ||
1977 | if (plus) { | |
1978 | entry->fattr->valid = 0; | |
1979 | error = decode_post_op_attr(xdr, entry->fattr); | |
1980 | if (unlikely(error)) | |
573c4e1e | 1981 | return error; |
e4f93234 CL |
1982 | if (entry->fattr->valid & NFS_ATTR_FATTR_V3) |
1983 | entry->d_type = nfs_umode_to_dtype(entry->fattr->mode); | |
1984 | ||
1985 | /* In fact, a post_op_fh3: */ | |
1986 | p = xdr_inline_decode(xdr, 4); | |
1987 | if (unlikely(p == NULL)) | |
1988 | goto out_overflow; | |
1989 | if (*p != xdr_zero) { | |
1990 | error = decode_nfs_fh3(xdr, entry->fh); | |
1991 | if (unlikely(error)) { | |
1992 | if (error == -E2BIG) | |
1993 | goto out_truncated; | |
573c4e1e | 1994 | return error; |
e4f93234 CL |
1995 | } |
1996 | } else | |
1997 | zero_nfs_fh3(entry->fh); | |
1998 | } | |
1999 | ||
573c4e1e | 2000 | return 0; |
e4f93234 CL |
2001 | |
2002 | out_overflow: | |
2003 | print_overflow_msg(__func__, xdr); | |
573c4e1e | 2004 | return -EAGAIN; |
e4f93234 CL |
2005 | out_truncated: |
2006 | dprintk("NFS: directory entry contains invalid file handle\n"); | |
2007 | *entry = old; | |
573c4e1e | 2008 | return -EAGAIN; |
e4f93234 CL |
2009 | } |
2010 | ||
2011 | /* | |
2012 | * 3.3.16 READDIR3res | |
2013 | * | |
2014 | * struct dirlist3 { | |
2015 | * entry3 *entries; | |
2016 | * bool eof; | |
2017 | * }; | |
2018 | * | |
2019 | * struct READDIR3resok { | |
2020 | * post_op_attr dir_attributes; | |
2021 | * cookieverf3 cookieverf; | |
2022 | * dirlist3 reply; | |
2023 | * }; | |
2024 | * | |
2025 | * struct READDIR3resfail { | |
2026 | * post_op_attr dir_attributes; | |
2027 | * }; | |
2028 | * | |
2029 | * union READDIR3res switch (nfsstat3 status) { | |
2030 | * case NFS3_OK: | |
2031 | * READDIR3resok resok; | |
2032 | * default: | |
2033 | * READDIR3resfail resfail; | |
2034 | * }; | |
2035 | * | |
2036 | * Read the directory contents into the page cache, but otherwise | |
2037 | * don't touch them. The actual decoding is done by nfs3_decode_entry() | |
2038 | * during subsequent nfs_readdir() calls. | |
2039 | */ | |
2040 | static int decode_dirlist3(struct xdr_stream *xdr) | |
2041 | { | |
2042 | u32 recvd, pglen; | |
2043 | size_t hdrlen; | |
2044 | ||
2045 | pglen = xdr->buf->page_len; | |
2046 | hdrlen = (u8 *)xdr->p - (u8 *)xdr->iov->iov_base; | |
2047 | recvd = xdr->buf->len - hdrlen; | |
2048 | if (unlikely(pglen > recvd)) | |
2049 | goto out_cheating; | |
2050 | out: | |
2051 | xdr_read_pages(xdr, pglen); | |
2052 | return pglen; | |
2053 | out_cheating: | |
2054 | dprintk("NFS: server cheating in readdir result: " | |
2055 | "pglen %u > recvd %u\n", pglen, recvd); | |
2056 | pglen = recvd; | |
2057 | goto out; | |
2058 | } | |
2059 | ||
2060 | static int decode_readdir3resok(struct xdr_stream *xdr, | |
2061 | struct nfs3_readdirres *result) | |
2062 | { | |
2063 | int error; | |
2064 | ||
2065 | error = decode_post_op_attr(xdr, result->dir_attr); | |
2066 | if (unlikely(error)) | |
2067 | goto out; | |
2068 | /* XXX: do we need to check if result->verf != NULL ? */ | |
2069 | error = decode_cookieverf3(xdr, result->verf); | |
2070 | if (unlikely(error)) | |
2071 | goto out; | |
2072 | error = decode_dirlist3(xdr); | |
2073 | out: | |
2074 | return error; | |
2075 | } | |
2076 | ||
bf269551 CL |
2077 | static int nfs3_xdr_dec_readdir3res(struct rpc_rqst *req, |
2078 | struct xdr_stream *xdr, | |
e4f93234 CL |
2079 | struct nfs3_readdirres *result) |
2080 | { | |
e4f93234 CL |
2081 | enum nfs_stat status; |
2082 | int error; | |
2083 | ||
bf269551 | 2084 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
2085 | if (unlikely(error)) |
2086 | goto out; | |
2087 | if (status != NFS3_OK) | |
2088 | goto out_default; | |
bf269551 | 2089 | error = decode_readdir3resok(xdr, result); |
e4f93234 CL |
2090 | out: |
2091 | return error; | |
2092 | out_default: | |
bf269551 | 2093 | error = decode_post_op_attr(xdr, result->dir_attr); |
e4f93234 CL |
2094 | if (unlikely(error)) |
2095 | goto out; | |
5e7e5a0d | 2096 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
2097 | } |
2098 | ||
e4f93234 CL |
2099 | /* |
2100 | * 3.3.18 FSSTAT3res | |
2101 | * | |
2102 | * struct FSSTAT3resok { | |
2103 | * post_op_attr obj_attributes; | |
2104 | * size3 tbytes; | |
2105 | * size3 fbytes; | |
2106 | * size3 abytes; | |
2107 | * size3 tfiles; | |
2108 | * size3 ffiles; | |
2109 | * size3 afiles; | |
2110 | * uint32 invarsec; | |
2111 | * }; | |
2112 | * | |
2113 | * struct FSSTAT3resfail { | |
2114 | * post_op_attr obj_attributes; | |
2115 | * }; | |
2116 | * | |
2117 | * union FSSTAT3res switch (nfsstat3 status) { | |
2118 | * case NFS3_OK: | |
2119 | * FSSTAT3resok resok; | |
2120 | * default: | |
2121 | * FSSTAT3resfail resfail; | |
2122 | * }; | |
2123 | */ | |
2124 | static int decode_fsstat3resok(struct xdr_stream *xdr, | |
2125 | struct nfs_fsstat *result) | |
2126 | { | |
2127 | __be32 *p; | |
2128 | ||
2129 | p = xdr_inline_decode(xdr, 8 * 6 + 4); | |
2130 | if (unlikely(p == NULL)) | |
2131 | goto out_overflow; | |
2132 | p = xdr_decode_size3(p, &result->tbytes); | |
2133 | p = xdr_decode_size3(p, &result->fbytes); | |
2134 | p = xdr_decode_size3(p, &result->abytes); | |
2135 | p = xdr_decode_size3(p, &result->tfiles); | |
2136 | p = xdr_decode_size3(p, &result->ffiles); | |
2137 | xdr_decode_size3(p, &result->afiles); | |
2138 | /* ignore invarsec */ | |
2139 | return 0; | |
2140 | out_overflow: | |
2141 | print_overflow_msg(__func__, xdr); | |
2142 | return -EIO; | |
2143 | } | |
2144 | ||
bf269551 CL |
2145 | static int nfs3_xdr_dec_fsstat3res(struct rpc_rqst *req, |
2146 | struct xdr_stream *xdr, | |
e4f93234 CL |
2147 | struct nfs_fsstat *result) |
2148 | { | |
e4f93234 CL |
2149 | enum nfs_stat status; |
2150 | int error; | |
2151 | ||
bf269551 | 2152 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
2153 | if (unlikely(error)) |
2154 | goto out; | |
bf269551 | 2155 | error = decode_post_op_attr(xdr, result->fattr); |
e4f93234 CL |
2156 | if (unlikely(error)) |
2157 | goto out; | |
2158 | if (status != NFS3_OK) | |
2159 | goto out_status; | |
bf269551 | 2160 | error = decode_fsstat3resok(xdr, result); |
e4f93234 CL |
2161 | out: |
2162 | return error; | |
2163 | out_status: | |
5e7e5a0d | 2164 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
2165 | } |
2166 | ||
e4f93234 CL |
2167 | /* |
2168 | * 3.3.19 FSINFO3res | |
2169 | * | |
2170 | * struct FSINFO3resok { | |
2171 | * post_op_attr obj_attributes; | |
2172 | * uint32 rtmax; | |
2173 | * uint32 rtpref; | |
2174 | * uint32 rtmult; | |
2175 | * uint32 wtmax; | |
2176 | * uint32 wtpref; | |
2177 | * uint32 wtmult; | |
2178 | * uint32 dtpref; | |
2179 | * size3 maxfilesize; | |
2180 | * nfstime3 time_delta; | |
2181 | * uint32 properties; | |
2182 | * }; | |
2183 | * | |
2184 | * struct FSINFO3resfail { | |
2185 | * post_op_attr obj_attributes; | |
2186 | * }; | |
2187 | * | |
2188 | * union FSINFO3res switch (nfsstat3 status) { | |
2189 | * case NFS3_OK: | |
2190 | * FSINFO3resok resok; | |
2191 | * default: | |
2192 | * FSINFO3resfail resfail; | |
2193 | * }; | |
2194 | */ | |
2195 | static int decode_fsinfo3resok(struct xdr_stream *xdr, | |
2196 | struct nfs_fsinfo *result) | |
2197 | { | |
2198 | __be32 *p; | |
2199 | ||
2200 | p = xdr_inline_decode(xdr, 4 * 7 + 8 + 8 + 4); | |
2201 | if (unlikely(p == NULL)) | |
2202 | goto out_overflow; | |
2203 | result->rtmax = be32_to_cpup(p++); | |
2204 | result->rtpref = be32_to_cpup(p++); | |
2205 | result->rtmult = be32_to_cpup(p++); | |
2206 | result->wtmax = be32_to_cpup(p++); | |
2207 | result->wtpref = be32_to_cpup(p++); | |
2208 | result->wtmult = be32_to_cpup(p++); | |
2209 | result->dtpref = be32_to_cpup(p++); | |
2210 | p = xdr_decode_size3(p, &result->maxfilesize); | |
f6048709 | 2211 | xdr_decode_nfstime3(p, &result->time_delta); |
e4f93234 CL |
2212 | |
2213 | /* ignore properties */ | |
2214 | result->lease_time = 0; | |
2215 | return 0; | |
2216 | out_overflow: | |
2217 | print_overflow_msg(__func__, xdr); | |
2218 | return -EIO; | |
2219 | } | |
2220 | ||
bf269551 CL |
2221 | static int nfs3_xdr_dec_fsinfo3res(struct rpc_rqst *req, |
2222 | struct xdr_stream *xdr, | |
e4f93234 CL |
2223 | struct nfs_fsinfo *result) |
2224 | { | |
e4f93234 CL |
2225 | enum nfs_stat status; |
2226 | int error; | |
2227 | ||
bf269551 | 2228 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
2229 | if (unlikely(error)) |
2230 | goto out; | |
bf269551 | 2231 | error = decode_post_op_attr(xdr, result->fattr); |
e4f93234 CL |
2232 | if (unlikely(error)) |
2233 | goto out; | |
2234 | if (status != NFS3_OK) | |
2235 | goto out_status; | |
bf269551 | 2236 | error = decode_fsinfo3resok(xdr, result); |
e4f93234 CL |
2237 | out: |
2238 | return error; | |
2239 | out_status: | |
5e7e5a0d | 2240 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
2241 | } |
2242 | ||
e4f93234 CL |
2243 | /* |
2244 | * 3.3.20 PATHCONF3res | |
2245 | * | |
2246 | * struct PATHCONF3resok { | |
2247 | * post_op_attr obj_attributes; | |
2248 | * uint32 linkmax; | |
2249 | * uint32 name_max; | |
2250 | * bool no_trunc; | |
2251 | * bool chown_restricted; | |
2252 | * bool case_insensitive; | |
2253 | * bool case_preserving; | |
2254 | * }; | |
2255 | * | |
2256 | * struct PATHCONF3resfail { | |
2257 | * post_op_attr obj_attributes; | |
2258 | * }; | |
2259 | * | |
2260 | * union PATHCONF3res switch (nfsstat3 status) { | |
2261 | * case NFS3_OK: | |
2262 | * PATHCONF3resok resok; | |
2263 | * default: | |
2264 | * PATHCONF3resfail resfail; | |
2265 | * }; | |
2266 | */ | |
2267 | static int decode_pathconf3resok(struct xdr_stream *xdr, | |
2268 | struct nfs_pathconf *result) | |
2269 | { | |
2270 | __be32 *p; | |
2271 | ||
2272 | p = xdr_inline_decode(xdr, 4 * 6); | |
2273 | if (unlikely(p == NULL)) | |
2274 | goto out_overflow; | |
2275 | result->max_link = be32_to_cpup(p++); | |
2276 | result->max_namelen = be32_to_cpup(p); | |
2277 | /* ignore remaining fields */ | |
2278 | return 0; | |
2279 | out_overflow: | |
2280 | print_overflow_msg(__func__, xdr); | |
2281 | return -EIO; | |
2282 | } | |
2283 | ||
bf269551 CL |
2284 | static int nfs3_xdr_dec_pathconf3res(struct rpc_rqst *req, |
2285 | struct xdr_stream *xdr, | |
e4f93234 CL |
2286 | struct nfs_pathconf *result) |
2287 | { | |
e4f93234 CL |
2288 | enum nfs_stat status; |
2289 | int error; | |
2290 | ||
bf269551 | 2291 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
2292 | if (unlikely(error)) |
2293 | goto out; | |
bf269551 | 2294 | error = decode_post_op_attr(xdr, result->fattr); |
e4f93234 CL |
2295 | if (unlikely(error)) |
2296 | goto out; | |
2297 | if (status != NFS3_OK) | |
2298 | goto out_status; | |
bf269551 | 2299 | error = decode_pathconf3resok(xdr, result); |
e4f93234 CL |
2300 | out: |
2301 | return error; | |
2302 | out_status: | |
5e7e5a0d | 2303 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
2304 | } |
2305 | ||
e4f93234 CL |
2306 | /* |
2307 | * 3.3.21 COMMIT3res | |
2308 | * | |
2309 | * struct COMMIT3resok { | |
2310 | * wcc_data file_wcc; | |
2311 | * writeverf3 verf; | |
2312 | * }; | |
2313 | * | |
2314 | * struct COMMIT3resfail { | |
2315 | * wcc_data file_wcc; | |
2316 | * }; | |
2317 | * | |
2318 | * union COMMIT3res switch (nfsstat3 status) { | |
2319 | * case NFS3_OK: | |
2320 | * COMMIT3resok resok; | |
2321 | * default: | |
2322 | * COMMIT3resfail resfail; | |
2323 | * }; | |
2324 | */ | |
bf269551 CL |
2325 | static int nfs3_xdr_dec_commit3res(struct rpc_rqst *req, |
2326 | struct xdr_stream *xdr, | |
0b7c0153 | 2327 | struct nfs_commitres *result) |
e4f93234 | 2328 | { |
e4f93234 CL |
2329 | enum nfs_stat status; |
2330 | int error; | |
2331 | ||
bf269551 | 2332 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
2333 | if (unlikely(error)) |
2334 | goto out; | |
bf269551 | 2335 | error = decode_wcc_data(xdr, result->fattr); |
e4f93234 CL |
2336 | if (unlikely(error)) |
2337 | goto out; | |
2338 | if (status != NFS3_OK) | |
2339 | goto out_status; | |
bf269551 | 2340 | error = decode_writeverf3(xdr, result->verf->verifier); |
e4f93234 CL |
2341 | out: |
2342 | return error; | |
2343 | out_status: | |
5e7e5a0d | 2344 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
2345 | } |
2346 | ||
b7fa0554 | 2347 | #ifdef CONFIG_NFS_V3_ACL |
b7fa0554 | 2348 | |
e4f93234 CL |
2349 | static inline int decode_getacl3resok(struct xdr_stream *xdr, |
2350 | struct nfs3_getaclres *result) | |
2351 | { | |
2352 | struct posix_acl **acl; | |
2353 | unsigned int *aclcnt; | |
2354 | size_t hdrlen; | |
2355 | int error; | |
2356 | ||
2357 | error = decode_post_op_attr(xdr, result->fattr); | |
2358 | if (unlikely(error)) | |
2359 | goto out; | |
2360 | error = decode_uint32(xdr, &result->mask); | |
2361 | if (unlikely(error)) | |
2362 | goto out; | |
2363 | error = -EINVAL; | |
2364 | if (result->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT)) | |
2365 | goto out; | |
2366 | ||
2367 | hdrlen = (u8 *)xdr->p - (u8 *)xdr->iov->iov_base; | |
2368 | ||
2369 | acl = NULL; | |
2370 | if (result->mask & NFS_ACL) | |
2371 | acl = &result->acl_access; | |
2372 | aclcnt = NULL; | |
2373 | if (result->mask & NFS_ACLCNT) | |
2374 | aclcnt = &result->acl_access_count; | |
2375 | error = nfsacl_decode(xdr->buf, hdrlen, aclcnt, acl); | |
2376 | if (unlikely(error <= 0)) | |
2377 | goto out; | |
2378 | ||
2379 | acl = NULL; | |
2380 | if (result->mask & NFS_DFACL) | |
2381 | acl = &result->acl_default; | |
2382 | aclcnt = NULL; | |
2383 | if (result->mask & NFS_DFACLCNT) | |
2384 | aclcnt = &result->acl_default_count; | |
2385 | error = nfsacl_decode(xdr->buf, hdrlen + error, aclcnt, acl); | |
2386 | if (unlikely(error <= 0)) | |
2387 | return error; | |
2388 | error = 0; | |
2389 | out: | |
2390 | return error; | |
2391 | } | |
2392 | ||
bf269551 CL |
2393 | static int nfs3_xdr_dec_getacl3res(struct rpc_rqst *req, |
2394 | struct xdr_stream *xdr, | |
e4f93234 CL |
2395 | struct nfs3_getaclres *result) |
2396 | { | |
e4f93234 CL |
2397 | enum nfs_stat status; |
2398 | int error; | |
2399 | ||
bf269551 | 2400 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
2401 | if (unlikely(error)) |
2402 | goto out; | |
2403 | if (status != NFS3_OK) | |
2404 | goto out_default; | |
bf269551 | 2405 | error = decode_getacl3resok(xdr, result); |
e4f93234 CL |
2406 | out: |
2407 | return error; | |
2408 | out_default: | |
5e7e5a0d | 2409 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
2410 | } |
2411 | ||
bf269551 CL |
2412 | static int nfs3_xdr_dec_setacl3res(struct rpc_rqst *req, |
2413 | struct xdr_stream *xdr, | |
e4f93234 CL |
2414 | struct nfs_fattr *result) |
2415 | { | |
e4f93234 CL |
2416 | enum nfs_stat status; |
2417 | int error; | |
2418 | ||
bf269551 | 2419 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
2420 | if (unlikely(error)) |
2421 | goto out; | |
2422 | if (status != NFS3_OK) | |
2423 | goto out_default; | |
bf269551 | 2424 | error = decode_post_op_attr(xdr, result); |
e4f93234 CL |
2425 | out: |
2426 | return error; | |
2427 | out_default: | |
5e7e5a0d | 2428 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
2429 | } |
2430 | ||
b7fa0554 AG |
2431 | #endif /* CONFIG_NFS_V3_ACL */ |
2432 | ||
5e7e5a0d BS |
2433 | |
2434 | /* | |
2435 | * We need to translate between nfs status return values and | |
2436 | * the local errno values which may not be the same. | |
2437 | */ | |
2438 | static const struct { | |
2439 | int stat; | |
2440 | int errno; | |
2441 | } nfs_errtbl[] = { | |
2442 | { NFS_OK, 0 }, | |
2443 | { NFSERR_PERM, -EPERM }, | |
2444 | { NFSERR_NOENT, -ENOENT }, | |
2445 | { NFSERR_IO, -errno_NFSERR_IO}, | |
2446 | { NFSERR_NXIO, -ENXIO }, | |
2447 | /* { NFSERR_EAGAIN, -EAGAIN }, */ | |
2448 | { NFSERR_ACCES, -EACCES }, | |
2449 | { NFSERR_EXIST, -EEXIST }, | |
2450 | { NFSERR_XDEV, -EXDEV }, | |
2451 | { NFSERR_NODEV, -ENODEV }, | |
2452 | { NFSERR_NOTDIR, -ENOTDIR }, | |
2453 | { NFSERR_ISDIR, -EISDIR }, | |
2454 | { NFSERR_INVAL, -EINVAL }, | |
2455 | { NFSERR_FBIG, -EFBIG }, | |
2456 | { NFSERR_NOSPC, -ENOSPC }, | |
2457 | { NFSERR_ROFS, -EROFS }, | |
2458 | { NFSERR_MLINK, -EMLINK }, | |
2459 | { NFSERR_NAMETOOLONG, -ENAMETOOLONG }, | |
2460 | { NFSERR_NOTEMPTY, -ENOTEMPTY }, | |
2461 | { NFSERR_DQUOT, -EDQUOT }, | |
2462 | { NFSERR_STALE, -ESTALE }, | |
2463 | { NFSERR_REMOTE, -EREMOTE }, | |
2464 | #ifdef EWFLUSH | |
2465 | { NFSERR_WFLUSH, -EWFLUSH }, | |
2466 | #endif | |
2467 | { NFSERR_BADHANDLE, -EBADHANDLE }, | |
2468 | { NFSERR_NOT_SYNC, -ENOTSYNC }, | |
2469 | { NFSERR_BAD_COOKIE, -EBADCOOKIE }, | |
2470 | { NFSERR_NOTSUPP, -ENOTSUPP }, | |
2471 | { NFSERR_TOOSMALL, -ETOOSMALL }, | |
2472 | { NFSERR_SERVERFAULT, -EREMOTEIO }, | |
2473 | { NFSERR_BADTYPE, -EBADTYPE }, | |
2474 | { NFSERR_JUKEBOX, -EJUKEBOX }, | |
2475 | { -1, -EIO } | |
2476 | }; | |
2477 | ||
2478 | /** | |
2479 | * nfs3_stat_to_errno - convert an NFS status code to a local errno | |
2480 | * @status: NFS status code to convert | |
2481 | * | |
2482 | * Returns a local errno value, or -EIO if the NFS status code is | |
2483 | * not recognized. This function is used jointly by NFSv2 and NFSv3. | |
2484 | */ | |
2485 | static int nfs3_stat_to_errno(enum nfs_stat status) | |
2486 | { | |
2487 | int i; | |
2488 | ||
2489 | for (i = 0; nfs_errtbl[i].stat != -1; i++) { | |
2490 | if (nfs_errtbl[i].stat == (int)status) | |
2491 | return nfs_errtbl[i].errno; | |
2492 | } | |
2493 | dprintk("NFS: Unrecognized nfs status value: %u\n", status); | |
2494 | return nfs_errtbl[i].errno; | |
2495 | } | |
2496 | ||
2497 | ||
1da177e4 LT |
2498 | #define PROC(proc, argtype, restype, timer) \ |
2499 | [NFS3PROC_##proc] = { \ | |
2500 | .p_proc = NFS3PROC_##proc, \ | |
9f06c719 | 2501 | .p_encode = (kxdreproc_t)nfs3_xdr_enc_##argtype##3args, \ |
bf269551 | 2502 | .p_decode = (kxdrdproc_t)nfs3_xdr_dec_##restype##3res, \ |
ad96b5b5 | 2503 | .p_arglen = NFS3_##argtype##args_sz, \ |
f5fc3c50 | 2504 | .p_replen = NFS3_##restype##res_sz, \ |
cc0175c1 CL |
2505 | .p_timer = timer, \ |
2506 | .p_statidx = NFS3PROC_##proc, \ | |
2507 | .p_name = #proc, \ | |
1da177e4 LT |
2508 | } |
2509 | ||
2510 | struct rpc_procinfo nfs3_procedures[] = { | |
f5fc3c50 CL |
2511 | PROC(GETATTR, getattr, getattr, 1), |
2512 | PROC(SETATTR, setattr, setattr, 0), | |
2513 | PROC(LOOKUP, lookup, lookup, 2), | |
2514 | PROC(ACCESS, access, access, 1), | |
2515 | PROC(READLINK, readlink, readlink, 3), | |
2516 | PROC(READ, read, read, 3), | |
2517 | PROC(WRITE, write, write, 4), | |
2518 | PROC(CREATE, create, create, 0), | |
2519 | PROC(MKDIR, mkdir, create, 0), | |
2520 | PROC(SYMLINK, symlink, create, 0), | |
2521 | PROC(MKNOD, mknod, create, 0), | |
2522 | PROC(REMOVE, remove, remove, 0), | |
2523 | PROC(RMDIR, lookup, setattr, 0), | |
2524 | PROC(RENAME, rename, rename, 0), | |
2525 | PROC(LINK, link, link, 0), | |
2526 | PROC(READDIR, readdir, readdir, 3), | |
2527 | PROC(READDIRPLUS, readdirplus, readdir, 3), | |
2528 | PROC(FSSTAT, getattr, fsstat, 0), | |
2529 | PROC(FSINFO, getattr, fsinfo, 0), | |
2530 | PROC(PATHCONF, getattr, pathconf, 0), | |
2531 | PROC(COMMIT, commit, commit, 5), | |
1da177e4 LT |
2532 | }; |
2533 | ||
a613fa16 | 2534 | const struct rpc_version nfs_version3 = { |
1da177e4 | 2535 | .number = 3, |
e8c96f8c | 2536 | .nrprocs = ARRAY_SIZE(nfs3_procedures), |
1da177e4 LT |
2537 | .procs = nfs3_procedures |
2538 | }; | |
2539 | ||
b7fa0554 AG |
2540 | #ifdef CONFIG_NFS_V3_ACL |
2541 | static struct rpc_procinfo nfs3_acl_procedures[] = { | |
2542 | [ACLPROC3_GETACL] = { | |
2543 | .p_proc = ACLPROC3_GETACL, | |
9f06c719 | 2544 | .p_encode = (kxdreproc_t)nfs3_xdr_enc_getacl3args, |
bf269551 | 2545 | .p_decode = (kxdrdproc_t)nfs3_xdr_dec_getacl3res, |
2bea90d4 CL |
2546 | .p_arglen = ACL3_getaclargs_sz, |
2547 | .p_replen = ACL3_getaclres_sz, | |
b7fa0554 | 2548 | .p_timer = 1, |
cc0175c1 | 2549 | .p_name = "GETACL", |
b7fa0554 AG |
2550 | }, |
2551 | [ACLPROC3_SETACL] = { | |
2552 | .p_proc = ACLPROC3_SETACL, | |
9f06c719 | 2553 | .p_encode = (kxdreproc_t)nfs3_xdr_enc_setacl3args, |
bf269551 | 2554 | .p_decode = (kxdrdproc_t)nfs3_xdr_dec_setacl3res, |
2bea90d4 CL |
2555 | .p_arglen = ACL3_setaclargs_sz, |
2556 | .p_replen = ACL3_setaclres_sz, | |
b7fa0554 | 2557 | .p_timer = 0, |
cc0175c1 | 2558 | .p_name = "SETACL", |
b7fa0554 AG |
2559 | }, |
2560 | }; | |
2561 | ||
a613fa16 | 2562 | const struct rpc_version nfsacl_version3 = { |
b7fa0554 AG |
2563 | .number = 3, |
2564 | .nrprocs = sizeof(nfs3_acl_procedures)/ | |
2565 | sizeof(nfs3_acl_procedures[0]), | |
2566 | .procs = nfs3_acl_procedures, | |
2567 | }; | |
2568 | #endif /* CONFIG_NFS_V3_ACL */ |