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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | /* |
3 | * linux/fs/nfs/nfs3xdr.c | |
4 | * | |
5 | * XDR functions to encode/decode NFSv3 RPC arguments and results. | |
6 | * | |
7 | * Copyright (C) 1996, 1997 Olaf Kirch | |
8 | */ | |
9 | ||
10 | #include <linux/param.h> | |
11 | #include <linux/time.h> | |
12 | #include <linux/mm.h> | |
1da177e4 LT |
13 | #include <linux/errno.h> |
14 | #include <linux/string.h> | |
15 | #include <linux/in.h> | |
16 | #include <linux/pagemap.h> | |
17 | #include <linux/proc_fs.h> | |
18 | #include <linux/kdev_t.h> | |
19 | #include <linux/sunrpc/clnt.h> | |
20 | #include <linux/nfs.h> | |
21 | #include <linux/nfs3.h> | |
22 | #include <linux/nfs_fs.h> | |
b7fa0554 | 23 | #include <linux/nfsacl.h> |
f7b422b1 | 24 | #include "internal.h" |
1da177e4 LT |
25 | |
26 | #define NFSDBG_FACILITY NFSDBG_XDR | |
27 | ||
28 | /* Mapping from NFS error code to "errno" error code. */ | |
29 | #define errno_NFSERR_IO EIO | |
30 | ||
1da177e4 LT |
31 | /* |
32 | * Declare the space requirements for NFS arguments and replies as | |
33 | * number of 32bit-words | |
34 | */ | |
35 | #define NFS3_fhandle_sz (1+16) | |
36 | #define NFS3_fh_sz (NFS3_fhandle_sz) /* shorthand */ | |
37 | #define NFS3_sattr_sz (15) | |
38 | #define NFS3_filename_sz (1+(NFS3_MAXNAMLEN>>2)) | |
39 | #define NFS3_path_sz (1+(NFS3_MAXPATHLEN>>2)) | |
40 | #define NFS3_fattr_sz (21) | |
d9c407b1 | 41 | #define NFS3_cookieverf_sz (NFS3_COOKIEVERFSIZE>>2) |
f5fc3c50 | 42 | #define NFS3_wcc_attr_sz (6) |
1da177e4 LT |
43 | #define NFS3_pre_op_attr_sz (1+NFS3_wcc_attr_sz) |
44 | #define NFS3_post_op_attr_sz (1+NFS3_fattr_sz) | |
f5fc3c50 | 45 | #define NFS3_wcc_data_sz (NFS3_pre_op_attr_sz+NFS3_post_op_attr_sz) |
1da177e4 | 46 | #define NFS3_diropargs_sz (NFS3_fh_sz+NFS3_filename_sz) |
ad96b5b5 CL |
47 | |
48 | #define NFS3_getattrargs_sz (NFS3_fh_sz) | |
49 | #define NFS3_setattrargs_sz (NFS3_fh_sz+NFS3_sattr_sz+3) | |
50 | #define NFS3_lookupargs_sz (NFS3_fh_sz+NFS3_filename_sz) | |
1da177e4 LT |
51 | #define NFS3_accessargs_sz (NFS3_fh_sz+1) |
52 | #define NFS3_readlinkargs_sz (NFS3_fh_sz) | |
53 | #define NFS3_readargs_sz (NFS3_fh_sz+3) | |
54 | #define NFS3_writeargs_sz (NFS3_fh_sz+5) | |
55 | #define NFS3_createargs_sz (NFS3_diropargs_sz+NFS3_sattr_sz) | |
56 | #define NFS3_mkdirargs_sz (NFS3_diropargs_sz+NFS3_sattr_sz) | |
94a6d753 | 57 | #define NFS3_symlinkargs_sz (NFS3_diropargs_sz+1+NFS3_sattr_sz) |
1da177e4 | 58 | #define NFS3_mknodargs_sz (NFS3_diropargs_sz+2+NFS3_sattr_sz) |
ad96b5b5 | 59 | #define NFS3_removeargs_sz (NFS3_fh_sz+NFS3_filename_sz) |
1da177e4 LT |
60 | #define NFS3_renameargs_sz (NFS3_diropargs_sz+NFS3_diropargs_sz) |
61 | #define NFS3_linkargs_sz (NFS3_fh_sz+NFS3_diropargs_sz) | |
d9c407b1 CL |
62 | #define NFS3_readdirargs_sz (NFS3_fh_sz+NFS3_cookieverf_sz+3) |
63 | #define NFS3_readdirplusargs_sz (NFS3_fh_sz+NFS3_cookieverf_sz+4) | |
1da177e4 LT |
64 | #define NFS3_commitargs_sz (NFS3_fh_sz+3) |
65 | ||
f5fc3c50 CL |
66 | #define NFS3_getattrres_sz (1+NFS3_fattr_sz) |
67 | #define NFS3_setattrres_sz (1+NFS3_wcc_data_sz) | |
68 | #define NFS3_removeres_sz (NFS3_setattrres_sz) | |
1da177e4 LT |
69 | #define NFS3_lookupres_sz (1+NFS3_fh_sz+(2 * NFS3_post_op_attr_sz)) |
70 | #define NFS3_accessres_sz (1+NFS3_post_op_attr_sz+1) | |
71 | #define NFS3_readlinkres_sz (1+NFS3_post_op_attr_sz+1) | |
72 | #define NFS3_readres_sz (1+NFS3_post_op_attr_sz+3) | |
73 | #define NFS3_writeres_sz (1+NFS3_wcc_data_sz+4) | |
74 | #define NFS3_createres_sz (1+NFS3_fh_sz+NFS3_post_op_attr_sz+NFS3_wcc_data_sz) | |
75 | #define NFS3_renameres_sz (1+(2 * NFS3_wcc_data_sz)) | |
76 | #define NFS3_linkres_sz (1+NFS3_post_op_attr_sz+NFS3_wcc_data_sz) | |
77 | #define NFS3_readdirres_sz (1+NFS3_post_op_attr_sz+2) | |
78 | #define NFS3_fsstatres_sz (1+NFS3_post_op_attr_sz+13) | |
79 | #define NFS3_fsinfores_sz (1+NFS3_post_op_attr_sz+12) | |
80 | #define NFS3_pathconfres_sz (1+NFS3_post_op_attr_sz+6) | |
81 | #define NFS3_commitres_sz (1+NFS3_wcc_data_sz+2) | |
82 | ||
b7fa0554 | 83 | #define ACL3_getaclargs_sz (NFS3_fh_sz+1) |
ae46141f TM |
84 | #define ACL3_setaclargs_sz (NFS3_fh_sz+1+ \ |
85 | XDR_QUADLEN(NFS_ACL_INLINE_BUFSIZE)) | |
86 | #define ACL3_getaclres_sz (1+NFS3_post_op_attr_sz+1+ \ | |
87 | XDR_QUADLEN(NFS_ACL_INLINE_BUFSIZE)) | |
b7fa0554 AG |
88 | #define ACL3_setaclres_sz (1+NFS3_post_op_attr_sz) |
89 | ||
5e7e5a0d BS |
90 | static int nfs3_stat_to_errno(enum nfs_stat); |
91 | ||
1da177e4 LT |
92 | /* |
93 | * Map file type to S_IFMT bits | |
94 | */ | |
bca79478 TM |
95 | static const umode_t nfs_type2fmt[] = { |
96 | [NF3BAD] = 0, | |
97 | [NF3REG] = S_IFREG, | |
98 | [NF3DIR] = S_IFDIR, | |
99 | [NF3BLK] = S_IFBLK, | |
100 | [NF3CHR] = S_IFCHR, | |
101 | [NF3LNK] = S_IFLNK, | |
102 | [NF3SOCK] = S_IFSOCK, | |
103 | [NF3FIFO] = S_IFIFO, | |
1da177e4 LT |
104 | }; |
105 | ||
d9c407b1 CL |
106 | /* |
107 | * While encoding arguments, set up the reply buffer in advance to | |
108 | * receive reply data directly into the page cache. | |
109 | */ | |
110 | static void prepare_reply_buffer(struct rpc_rqst *req, struct page **pages, | |
111 | unsigned int base, unsigned int len, | |
112 | unsigned int bufsize) | |
113 | { | |
114 | struct rpc_auth *auth = req->rq_cred->cr_auth; | |
115 | unsigned int replen; | |
116 | ||
117 | replen = RPC_REPHDRSIZE + auth->au_rslack + bufsize; | |
118 | xdr_inline_pages(&req->rq_rcv_buf, replen << 2, pages, base, len); | |
119 | } | |
120 | ||
e4f93234 CL |
121 | /* |
122 | * Handle decode buffer overflows out-of-line. | |
123 | */ | |
124 | static void print_overflow_msg(const char *func, const struct xdr_stream *xdr) | |
125 | { | |
126 | dprintk("NFS: %s prematurely hit the end of our receive buffer. " | |
127 | "Remaining buffer length is %tu words.\n", | |
128 | func, xdr->end - xdr->p); | |
129 | } | |
130 | ||
d9c407b1 | 131 | |
d9c407b1 CL |
132 | /* |
133 | * Encode/decode NFSv3 basic data types | |
134 | * | |
135 | * Basic NFSv3 data types are defined in section 2.5 of RFC 1813: | |
136 | * "NFS Version 3 Protocol Specification". | |
137 | * | |
138 | * Not all basic data types have their own encoding and decoding | |
139 | * functions. For run-time efficiency, some data types are encoded | |
140 | * or decoded inline. | |
141 | */ | |
142 | ||
143 | static void encode_uint32(struct xdr_stream *xdr, u32 value) | |
144 | { | |
145 | __be32 *p = xdr_reserve_space(xdr, 4); | |
146 | *p = cpu_to_be32(value); | |
147 | } | |
148 | ||
e4f93234 CL |
149 | static int decode_uint32(struct xdr_stream *xdr, u32 *value) |
150 | { | |
151 | __be32 *p; | |
152 | ||
153 | p = xdr_inline_decode(xdr, 4); | |
154 | if (unlikely(p == NULL)) | |
155 | goto out_overflow; | |
156 | *value = be32_to_cpup(p); | |
157 | return 0; | |
158 | out_overflow: | |
159 | print_overflow_msg(__func__, xdr); | |
160 | return -EIO; | |
161 | } | |
162 | ||
163 | static int decode_uint64(struct xdr_stream *xdr, u64 *value) | |
164 | { | |
165 | __be32 *p; | |
166 | ||
167 | p = xdr_inline_decode(xdr, 8); | |
168 | if (unlikely(p == NULL)) | |
169 | goto out_overflow; | |
170 | xdr_decode_hyper(p, value); | |
171 | return 0; | |
172 | out_overflow: | |
173 | print_overflow_msg(__func__, xdr); | |
174 | return -EIO; | |
175 | } | |
176 | ||
177 | /* | |
178 | * fileid3 | |
179 | * | |
180 | * typedef uint64 fileid3; | |
181 | */ | |
f6048709 CL |
182 | static __be32 *xdr_decode_fileid3(__be32 *p, u64 *fileid) |
183 | { | |
184 | return xdr_decode_hyper(p, fileid); | |
185 | } | |
186 | ||
e4f93234 CL |
187 | static int decode_fileid3(struct xdr_stream *xdr, u64 *fileid) |
188 | { | |
189 | return decode_uint64(xdr, fileid); | |
190 | } | |
191 | ||
d9c407b1 CL |
192 | /* |
193 | * filename3 | |
194 | * | |
195 | * typedef string filename3<>; | |
196 | */ | |
197 | static void encode_filename3(struct xdr_stream *xdr, | |
198 | const char *name, u32 length) | |
199 | { | |
200 | __be32 *p; | |
201 | ||
7fc38846 | 202 | WARN_ON_ONCE(length > NFS3_MAXNAMLEN); |
d9c407b1 CL |
203 | p = xdr_reserve_space(xdr, 4 + length); |
204 | xdr_encode_opaque(p, name, length); | |
205 | } | |
206 | ||
e4f93234 CL |
207 | static int decode_inline_filename3(struct xdr_stream *xdr, |
208 | const char **name, u32 *length) | |
209 | { | |
210 | __be32 *p; | |
211 | u32 count; | |
212 | ||
213 | p = xdr_inline_decode(xdr, 4); | |
214 | if (unlikely(p == NULL)) | |
215 | goto out_overflow; | |
216 | count = be32_to_cpup(p); | |
217 | if (count > NFS3_MAXNAMLEN) | |
218 | goto out_nametoolong; | |
219 | p = xdr_inline_decode(xdr, count); | |
220 | if (unlikely(p == NULL)) | |
221 | goto out_overflow; | |
222 | *name = (const char *)p; | |
223 | *length = count; | |
224 | return 0; | |
225 | ||
226 | out_nametoolong: | |
227 | dprintk("NFS: returned filename too long: %u\n", count); | |
228 | return -ENAMETOOLONG; | |
229 | out_overflow: | |
230 | print_overflow_msg(__func__, xdr); | |
231 | return -EIO; | |
232 | } | |
233 | ||
d9c407b1 CL |
234 | /* |
235 | * nfspath3 | |
236 | * | |
237 | * typedef string nfspath3<>; | |
238 | */ | |
239 | static void encode_nfspath3(struct xdr_stream *xdr, struct page **pages, | |
240 | const u32 length) | |
241 | { | |
d9c407b1 CL |
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 | { | |
d9c407b1 CL |
391 | encode_uint32(xdr, type); |
392 | } | |
393 | ||
f6048709 CL |
394 | static __be32 *xdr_decode_ftype3(__be32 *p, umode_t *mode) |
395 | { | |
396 | u32 type; | |
397 | ||
398 | type = be32_to_cpup(p++); | |
399 | if (type > NF3FIFO) | |
400 | type = NF3NON; | |
401 | *mode = nfs_type2fmt[type]; | |
402 | return p; | |
403 | } | |
404 | ||
d9c407b1 CL |
405 | /* |
406 | * specdata3 | |
407 | * | |
408 | * struct specdata3 { | |
409 | * uint32 specdata1; | |
410 | * uint32 specdata2; | |
411 | * }; | |
412 | */ | |
413 | static void encode_specdata3(struct xdr_stream *xdr, const dev_t rdev) | |
414 | { | |
415 | __be32 *p; | |
416 | ||
417 | p = xdr_reserve_space(xdr, 8); | |
418 | *p++ = cpu_to_be32(MAJOR(rdev)); | |
419 | *p = cpu_to_be32(MINOR(rdev)); | |
420 | } | |
421 | ||
f6048709 CL |
422 | static __be32 *xdr_decode_specdata3(__be32 *p, dev_t *rdev) |
423 | { | |
424 | unsigned int major, minor; | |
425 | ||
426 | major = be32_to_cpup(p++); | |
427 | minor = be32_to_cpup(p++); | |
428 | *rdev = MKDEV(major, minor); | |
429 | if (MAJOR(*rdev) != major || MINOR(*rdev) != minor) | |
430 | *rdev = 0; | |
431 | return p; | |
432 | } | |
433 | ||
d9c407b1 CL |
434 | /* |
435 | * nfs_fh3 | |
436 | * | |
437 | * struct nfs_fh3 { | |
438 | * opaque data<NFS3_FHSIZE>; | |
439 | * }; | |
440 | */ | |
441 | static void encode_nfs_fh3(struct xdr_stream *xdr, const struct nfs_fh *fh) | |
442 | { | |
443 | __be32 *p; | |
444 | ||
7fc38846 | 445 | WARN_ON_ONCE(fh->size > NFS3_FHSIZE); |
d9c407b1 CL |
446 | p = xdr_reserve_space(xdr, 4 + fh->size); |
447 | xdr_encode_opaque(p, fh->data, fh->size); | |
448 | } | |
449 | ||
e4f93234 CL |
450 | static int decode_nfs_fh3(struct xdr_stream *xdr, struct nfs_fh *fh) |
451 | { | |
452 | u32 length; | |
453 | __be32 *p; | |
454 | ||
455 | p = xdr_inline_decode(xdr, 4); | |
456 | if (unlikely(p == NULL)) | |
457 | goto out_overflow; | |
458 | length = be32_to_cpup(p++); | |
459 | if (unlikely(length > NFS3_FHSIZE)) | |
460 | goto out_toobig; | |
461 | p = xdr_inline_decode(xdr, length); | |
462 | if (unlikely(p == NULL)) | |
463 | goto out_overflow; | |
464 | fh->size = length; | |
465 | memcpy(fh->data, p, length); | |
466 | return 0; | |
467 | out_toobig: | |
468 | dprintk("NFS: file handle size (%u) too big\n", length); | |
469 | return -E2BIG; | |
470 | out_overflow: | |
471 | print_overflow_msg(__func__, xdr); | |
472 | return -EIO; | |
473 | } | |
474 | ||
475 | static void zero_nfs_fh3(struct nfs_fh *fh) | |
476 | { | |
477 | memset(fh, 0, sizeof(*fh)); | |
478 | } | |
479 | ||
9d5a6434 CL |
480 | /* |
481 | * nfstime3 | |
482 | * | |
483 | * struct nfstime3 { | |
484 | * uint32 seconds; | |
485 | * uint32 nseconds; | |
486 | * }; | |
487 | */ | |
488 | static __be32 *xdr_encode_nfstime3(__be32 *p, const struct timespec *timep) | |
489 | { | |
490 | *p++ = cpu_to_be32(timep->tv_sec); | |
491 | *p++ = cpu_to_be32(timep->tv_nsec); | |
492 | return p; | |
493 | } | |
494 | ||
f6048709 CL |
495 | static __be32 *xdr_decode_nfstime3(__be32 *p, struct timespec *timep) |
496 | { | |
497 | timep->tv_sec = be32_to_cpup(p++); | |
498 | timep->tv_nsec = be32_to_cpup(p++); | |
499 | return p; | |
500 | } | |
501 | ||
d9c407b1 CL |
502 | /* |
503 | * sattr3 | |
504 | * | |
505 | * enum time_how { | |
506 | * DONT_CHANGE = 0, | |
507 | * SET_TO_SERVER_TIME = 1, | |
508 | * SET_TO_CLIENT_TIME = 2 | |
509 | * }; | |
510 | * | |
511 | * union set_mode3 switch (bool set_it) { | |
512 | * case TRUE: | |
513 | * mode3 mode; | |
514 | * default: | |
515 | * void; | |
516 | * }; | |
517 | * | |
518 | * union set_uid3 switch (bool set_it) { | |
519 | * case TRUE: | |
520 | * uid3 uid; | |
521 | * default: | |
522 | * void; | |
523 | * }; | |
524 | * | |
525 | * union set_gid3 switch (bool set_it) { | |
526 | * case TRUE: | |
527 | * gid3 gid; | |
528 | * default: | |
529 | * void; | |
530 | * }; | |
531 | * | |
532 | * union set_size3 switch (bool set_it) { | |
533 | * case TRUE: | |
534 | * size3 size; | |
535 | * default: | |
536 | * void; | |
537 | * }; | |
538 | * | |
539 | * union set_atime switch (time_how set_it) { | |
540 | * case SET_TO_CLIENT_TIME: | |
541 | * nfstime3 atime; | |
542 | * default: | |
543 | * void; | |
544 | * }; | |
545 | * | |
546 | * union set_mtime switch (time_how set_it) { | |
547 | * case SET_TO_CLIENT_TIME: | |
548 | * nfstime3 mtime; | |
549 | * default: | |
550 | * void; | |
551 | * }; | |
552 | * | |
553 | * struct sattr3 { | |
554 | * set_mode3 mode; | |
555 | * set_uid3 uid; | |
556 | * set_gid3 gid; | |
557 | * set_size3 size; | |
558 | * set_atime atime; | |
559 | * set_mtime mtime; | |
560 | * }; | |
561 | */ | |
562 | static void encode_sattr3(struct xdr_stream *xdr, const struct iattr *attr) | |
563 | { | |
564 | u32 nbytes; | |
565 | __be32 *p; | |
566 | ||
567 | /* | |
568 | * In order to make only a single xdr_reserve_space() call, | |
569 | * pre-compute the total number of bytes to be reserved. | |
570 | * Six boolean values, one for each set_foo field, are always | |
571 | * present in the encoded result, so start there. | |
572 | */ | |
573 | nbytes = 6 * 4; | |
574 | if (attr->ia_valid & ATTR_MODE) | |
575 | nbytes += 4; | |
576 | if (attr->ia_valid & ATTR_UID) | |
577 | nbytes += 4; | |
578 | if (attr->ia_valid & ATTR_GID) | |
579 | nbytes += 4; | |
580 | if (attr->ia_valid & ATTR_SIZE) | |
581 | nbytes += 8; | |
582 | if (attr->ia_valid & ATTR_ATIME_SET) | |
583 | nbytes += 8; | |
584 | if (attr->ia_valid & ATTR_MTIME_SET) | |
585 | nbytes += 8; | |
586 | p = xdr_reserve_space(xdr, nbytes); | |
587 | ||
9d5a6434 CL |
588 | if (attr->ia_valid & ATTR_MODE) { |
589 | *p++ = xdr_one; | |
590 | *p++ = cpu_to_be32(attr->ia_mode & S_IALLUGO); | |
591 | } else | |
592 | *p++ = xdr_zero; | |
593 | ||
594 | if (attr->ia_valid & ATTR_UID) { | |
595 | *p++ = xdr_one; | |
57a38dae | 596 | *p++ = cpu_to_be32(from_kuid(&init_user_ns, attr->ia_uid)); |
9d5a6434 CL |
597 | } else |
598 | *p++ = xdr_zero; | |
599 | ||
600 | if (attr->ia_valid & ATTR_GID) { | |
601 | *p++ = xdr_one; | |
57a38dae | 602 | *p++ = cpu_to_be32(from_kgid(&init_user_ns, attr->ia_gid)); |
9d5a6434 CL |
603 | } else |
604 | *p++ = xdr_zero; | |
605 | ||
606 | if (attr->ia_valid & ATTR_SIZE) { | |
607 | *p++ = xdr_one; | |
608 | p = xdr_encode_hyper(p, (u64)attr->ia_size); | |
609 | } else | |
610 | *p++ = xdr_zero; | |
611 | ||
612 | if (attr->ia_valid & ATTR_ATIME_SET) { | |
613 | *p++ = xdr_two; | |
614 | p = xdr_encode_nfstime3(p, &attr->ia_atime); | |
615 | } else if (attr->ia_valid & ATTR_ATIME) { | |
616 | *p++ = xdr_one; | |
617 | } else | |
618 | *p++ = xdr_zero; | |
619 | ||
620 | if (attr->ia_valid & ATTR_MTIME_SET) { | |
621 | *p++ = xdr_two; | |
622 | xdr_encode_nfstime3(p, &attr->ia_mtime); | |
623 | } else if (attr->ia_valid & ATTR_MTIME) { | |
624 | *p = xdr_one; | |
625 | } else | |
626 | *p = xdr_zero; | |
d9c407b1 CL |
627 | } |
628 | ||
e4f93234 CL |
629 | /* |
630 | * fattr3 | |
631 | * | |
632 | * struct fattr3 { | |
633 | * ftype3 type; | |
634 | * mode3 mode; | |
635 | * uint32 nlink; | |
636 | * uid3 uid; | |
637 | * gid3 gid; | |
638 | * size3 size; | |
639 | * size3 used; | |
640 | * specdata3 rdev; | |
641 | * uint64 fsid; | |
642 | * fileid3 fileid; | |
643 | * nfstime3 atime; | |
644 | * nfstime3 mtime; | |
645 | * nfstime3 ctime; | |
646 | * }; | |
647 | */ | |
648 | static int decode_fattr3(struct xdr_stream *xdr, struct nfs_fattr *fattr) | |
649 | { | |
f6048709 | 650 | umode_t fmode; |
e4f93234 CL |
651 | __be32 *p; |
652 | ||
653 | p = xdr_inline_decode(xdr, NFS3_fattr_sz << 2); | |
654 | if (unlikely(p == NULL)) | |
655 | goto out_overflow; | |
f6048709 CL |
656 | |
657 | p = xdr_decode_ftype3(p, &fmode); | |
658 | ||
659 | fattr->mode = (be32_to_cpup(p++) & ~S_IFMT) | fmode; | |
660 | fattr->nlink = be32_to_cpup(p++); | |
57a38dae EB |
661 | fattr->uid = make_kuid(&init_user_ns, be32_to_cpup(p++)); |
662 | if (!uid_valid(fattr->uid)) | |
663 | goto out_uid; | |
664 | fattr->gid = make_kgid(&init_user_ns, be32_to_cpup(p++)); | |
665 | if (!gid_valid(fattr->gid)) | |
666 | goto out_gid; | |
f6048709 CL |
667 | |
668 | p = xdr_decode_size3(p, &fattr->size); | |
669 | p = xdr_decode_size3(p, &fattr->du.nfs3.used); | |
670 | p = xdr_decode_specdata3(p, &fattr->rdev); | |
671 | ||
672 | p = xdr_decode_hyper(p, &fattr->fsid.major); | |
673 | fattr->fsid.minor = 0; | |
674 | ||
675 | p = xdr_decode_fileid3(p, &fattr->fileid); | |
676 | p = xdr_decode_nfstime3(p, &fattr->atime); | |
677 | p = xdr_decode_nfstime3(p, &fattr->mtime); | |
678 | xdr_decode_nfstime3(p, &fattr->ctime); | |
3a1556e8 | 679 | fattr->change_attr = nfs_timespec_to_change_attr(&fattr->ctime); |
f6048709 CL |
680 | |
681 | fattr->valid |= NFS_ATTR_FATTR_V3; | |
e4f93234 | 682 | return 0; |
57a38dae EB |
683 | out_uid: |
684 | dprintk("NFS: returned invalid uid\n"); | |
685 | return -EINVAL; | |
686 | out_gid: | |
687 | dprintk("NFS: returned invalid gid\n"); | |
688 | return -EINVAL; | |
e4f93234 CL |
689 | out_overflow: |
690 | print_overflow_msg(__func__, xdr); | |
691 | return -EIO; | |
692 | } | |
693 | ||
694 | /* | |
695 | * post_op_attr | |
696 | * | |
697 | * union post_op_attr switch (bool attributes_follow) { | |
698 | * case TRUE: | |
699 | * fattr3 attributes; | |
700 | * case FALSE: | |
701 | * void; | |
702 | * }; | |
703 | */ | |
704 | static int decode_post_op_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr) | |
705 | { | |
706 | __be32 *p; | |
707 | ||
708 | p = xdr_inline_decode(xdr, 4); | |
709 | if (unlikely(p == NULL)) | |
710 | goto out_overflow; | |
711 | if (*p != xdr_zero) | |
712 | return decode_fattr3(xdr, fattr); | |
713 | return 0; | |
714 | out_overflow: | |
715 | print_overflow_msg(__func__, xdr); | |
716 | return -EIO; | |
717 | } | |
718 | ||
719 | /* | |
720 | * wcc_attr | |
721 | * struct wcc_attr { | |
722 | * size3 size; | |
723 | * nfstime3 mtime; | |
724 | * nfstime3 ctime; | |
725 | * }; | |
726 | */ | |
727 | static int decode_wcc_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr) | |
728 | { | |
729 | __be32 *p; | |
730 | ||
731 | p = xdr_inline_decode(xdr, NFS3_wcc_attr_sz << 2); | |
732 | if (unlikely(p == NULL)) | |
733 | goto out_overflow; | |
f6048709 CL |
734 | |
735 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE | |
3a1556e8 | 736 | | NFS_ATTR_FATTR_PRECHANGE |
f6048709 CL |
737 | | NFS_ATTR_FATTR_PREMTIME |
738 | | NFS_ATTR_FATTR_PRECTIME; | |
739 | ||
740 | p = xdr_decode_size3(p, &fattr->pre_size); | |
741 | p = xdr_decode_nfstime3(p, &fattr->pre_mtime); | |
742 | xdr_decode_nfstime3(p, &fattr->pre_ctime); | |
3a1556e8 | 743 | fattr->pre_change_attr = nfs_timespec_to_change_attr(&fattr->pre_ctime); |
f6048709 | 744 | |
e4f93234 CL |
745 | return 0; |
746 | out_overflow: | |
747 | print_overflow_msg(__func__, xdr); | |
748 | return -EIO; | |
749 | } | |
750 | ||
751 | /* | |
752 | * pre_op_attr | |
753 | * union pre_op_attr switch (bool attributes_follow) { | |
754 | * case TRUE: | |
755 | * wcc_attr attributes; | |
756 | * case FALSE: | |
757 | * void; | |
758 | * }; | |
759 | * | |
760 | * wcc_data | |
761 | * | |
762 | * struct wcc_data { | |
763 | * pre_op_attr before; | |
764 | * post_op_attr after; | |
765 | * }; | |
766 | */ | |
767 | static int decode_pre_op_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr) | |
768 | { | |
769 | __be32 *p; | |
770 | ||
771 | p = xdr_inline_decode(xdr, 4); | |
772 | if (unlikely(p == NULL)) | |
773 | goto out_overflow; | |
774 | if (*p != xdr_zero) | |
775 | return decode_wcc_attr(xdr, fattr); | |
776 | return 0; | |
777 | out_overflow: | |
778 | print_overflow_msg(__func__, xdr); | |
779 | return -EIO; | |
780 | } | |
781 | ||
782 | static int decode_wcc_data(struct xdr_stream *xdr, struct nfs_fattr *fattr) | |
783 | { | |
784 | int error; | |
785 | ||
786 | error = decode_pre_op_attr(xdr, fattr); | |
787 | if (unlikely(error)) | |
788 | goto out; | |
789 | error = decode_post_op_attr(xdr, fattr); | |
790 | out: | |
791 | return error; | |
792 | } | |
793 | ||
794 | /* | |
795 | * post_op_fh3 | |
796 | * | |
797 | * union post_op_fh3 switch (bool handle_follows) { | |
798 | * case TRUE: | |
799 | * nfs_fh3 handle; | |
800 | * case FALSE: | |
801 | * void; | |
802 | * }; | |
803 | */ | |
804 | static int decode_post_op_fh3(struct xdr_stream *xdr, struct nfs_fh *fh) | |
805 | { | |
806 | __be32 *p = xdr_inline_decode(xdr, 4); | |
807 | if (unlikely(p == NULL)) | |
808 | goto out_overflow; | |
809 | if (*p != xdr_zero) | |
810 | return decode_nfs_fh3(xdr, fh); | |
811 | zero_nfs_fh3(fh); | |
812 | return 0; | |
813 | out_overflow: | |
814 | print_overflow_msg(__func__, xdr); | |
815 | return -EIO; | |
816 | } | |
817 | ||
d9c407b1 CL |
818 | /* |
819 | * diropargs3 | |
820 | * | |
821 | * struct diropargs3 { | |
822 | * nfs_fh3 dir; | |
823 | * filename3 name; | |
824 | * }; | |
825 | */ | |
826 | static void encode_diropargs3(struct xdr_stream *xdr, const struct nfs_fh *fh, | |
827 | const char *name, u32 length) | |
828 | { | |
829 | encode_nfs_fh3(xdr, fh); | |
830 | encode_filename3(xdr, name, length); | |
831 | } | |
832 | ||
833 | ||
1da177e4 | 834 | /* |
499ff710 CL |
835 | * NFSv3 XDR encode functions |
836 | * | |
837 | * NFSv3 argument types are defined in section 3.3 of RFC 1813: | |
838 | * "NFS Version 3 Protocol Specification". | |
1da177e4 LT |
839 | */ |
840 | ||
d9c407b1 CL |
841 | /* |
842 | * 3.3.1 GETATTR3args | |
843 | * | |
844 | * struct GETATTR3args { | |
845 | * nfs_fh3 object; | |
846 | * }; | |
847 | */ | |
9f06c719 CL |
848 | static void nfs3_xdr_enc_getattr3args(struct rpc_rqst *req, |
849 | struct xdr_stream *xdr, | |
fcc85819 | 850 | const void *data) |
d9c407b1 | 851 | { |
fcc85819 CH |
852 | const struct nfs_fh *fh = data; |
853 | ||
9f06c719 | 854 | encode_nfs_fh3(xdr, fh); |
d9c407b1 CL |
855 | } |
856 | ||
d9c407b1 CL |
857 | /* |
858 | * 3.3.2 SETATTR3args | |
859 | * | |
860 | * union sattrguard3 switch (bool check) { | |
861 | * case TRUE: | |
862 | * nfstime3 obj_ctime; | |
863 | * case FALSE: | |
864 | * void; | |
865 | * }; | |
866 | * | |
867 | * struct SETATTR3args { | |
868 | * nfs_fh3 object; | |
869 | * sattr3 new_attributes; | |
870 | * sattrguard3 guard; | |
871 | * }; | |
872 | */ | |
873 | static void encode_sattrguard3(struct xdr_stream *xdr, | |
874 | const struct nfs3_sattrargs *args) | |
875 | { | |
876 | __be32 *p; | |
877 | ||
878 | if (args->guard) { | |
879 | p = xdr_reserve_space(xdr, 4 + 8); | |
880 | *p++ = xdr_one; | |
9d5a6434 | 881 | xdr_encode_nfstime3(p, &args->guardtime); |
d9c407b1 CL |
882 | } else { |
883 | p = xdr_reserve_space(xdr, 4); | |
884 | *p = xdr_zero; | |
885 | } | |
886 | } | |
887 | ||
9f06c719 CL |
888 | static void nfs3_xdr_enc_setattr3args(struct rpc_rqst *req, |
889 | struct xdr_stream *xdr, | |
fcc85819 | 890 | const void *data) |
d9c407b1 | 891 | { |
fcc85819 | 892 | const struct nfs3_sattrargs *args = data; |
9f06c719 CL |
893 | encode_nfs_fh3(xdr, args->fh); |
894 | encode_sattr3(xdr, args->sattr); | |
895 | encode_sattrguard3(xdr, args); | |
d9c407b1 CL |
896 | } |
897 | ||
d9c407b1 CL |
898 | /* |
899 | * 3.3.3 LOOKUP3args | |
900 | * | |
901 | * struct LOOKUP3args { | |
902 | * diropargs3 what; | |
903 | * }; | |
904 | */ | |
9f06c719 CL |
905 | static void nfs3_xdr_enc_lookup3args(struct rpc_rqst *req, |
906 | struct xdr_stream *xdr, | |
fcc85819 | 907 | const void *data) |
d9c407b1 | 908 | { |
fcc85819 CH |
909 | const struct nfs3_diropargs *args = data; |
910 | ||
9f06c719 | 911 | encode_diropargs3(xdr, args->fh, args->name, args->len); |
d9c407b1 CL |
912 | } |
913 | ||
d9c407b1 CL |
914 | /* |
915 | * 3.3.4 ACCESS3args | |
916 | * | |
917 | * struct ACCESS3args { | |
918 | * nfs_fh3 object; | |
919 | * uint32 access; | |
920 | * }; | |
921 | */ | |
922 | static void encode_access3args(struct xdr_stream *xdr, | |
923 | const struct nfs3_accessargs *args) | |
924 | { | |
925 | encode_nfs_fh3(xdr, args->fh); | |
926 | encode_uint32(xdr, args->access); | |
927 | } | |
928 | ||
9f06c719 CL |
929 | static void nfs3_xdr_enc_access3args(struct rpc_rqst *req, |
930 | struct xdr_stream *xdr, | |
fcc85819 | 931 | const void *data) |
d9c407b1 | 932 | { |
fcc85819 CH |
933 | const struct nfs3_accessargs *args = data; |
934 | ||
9f06c719 | 935 | encode_access3args(xdr, args); |
d9c407b1 CL |
936 | } |
937 | ||
938 | /* | |
939 | * 3.3.5 READLINK3args | |
940 | * | |
941 | * struct READLINK3args { | |
942 | * nfs_fh3 symlink; | |
943 | * }; | |
944 | */ | |
9f06c719 CL |
945 | static void nfs3_xdr_enc_readlink3args(struct rpc_rqst *req, |
946 | struct xdr_stream *xdr, | |
fcc85819 | 947 | const void *data) |
d9c407b1 | 948 | { |
fcc85819 CH |
949 | const struct nfs3_readlinkargs *args = data; |
950 | ||
9f06c719 | 951 | encode_nfs_fh3(xdr, args->fh); |
d9c407b1 CL |
952 | prepare_reply_buffer(req, args->pages, args->pgbase, |
953 | args->pglen, NFS3_readlinkres_sz); | |
d9c407b1 CL |
954 | } |
955 | ||
d9c407b1 CL |
956 | /* |
957 | * 3.3.6 READ3args | |
958 | * | |
959 | * struct READ3args { | |
960 | * nfs_fh3 file; | |
961 | * offset3 offset; | |
962 | * count3 count; | |
963 | * }; | |
964 | */ | |
965 | static void encode_read3args(struct xdr_stream *xdr, | |
3c6b899c | 966 | const struct nfs_pgio_args *args) |
d9c407b1 CL |
967 | { |
968 | __be32 *p; | |
969 | ||
970 | encode_nfs_fh3(xdr, args->fh); | |
971 | ||
972 | p = xdr_reserve_space(xdr, 8 + 4); | |
973 | p = xdr_encode_hyper(p, args->offset); | |
974 | *p = cpu_to_be32(args->count); | |
975 | } | |
976 | ||
9f06c719 CL |
977 | static void nfs3_xdr_enc_read3args(struct rpc_rqst *req, |
978 | struct xdr_stream *xdr, | |
fcc85819 | 979 | const void *data) |
d9c407b1 | 980 | { |
fcc85819 CH |
981 | const struct nfs_pgio_args *args = data; |
982 | ||
9f06c719 | 983 | encode_read3args(xdr, args); |
d9c407b1 CL |
984 | prepare_reply_buffer(req, args->pages, args->pgbase, |
985 | args->count, NFS3_readres_sz); | |
986 | req->rq_rcv_buf.flags |= XDRBUF_READ; | |
d9c407b1 CL |
987 | } |
988 | ||
d9c407b1 CL |
989 | /* |
990 | * 3.3.7 WRITE3args | |
991 | * | |
992 | * enum stable_how { | |
993 | * UNSTABLE = 0, | |
994 | * DATA_SYNC = 1, | |
995 | * FILE_SYNC = 2 | |
996 | * }; | |
997 | * | |
998 | * struct WRITE3args { | |
999 | * nfs_fh3 file; | |
1000 | * offset3 offset; | |
1001 | * count3 count; | |
1002 | * stable_how stable; | |
1003 | * opaque data<>; | |
1004 | * }; | |
1005 | */ | |
1006 | static void encode_write3args(struct xdr_stream *xdr, | |
3c6b899c | 1007 | const struct nfs_pgio_args *args) |
d9c407b1 CL |
1008 | { |
1009 | __be32 *p; | |
1010 | ||
1011 | encode_nfs_fh3(xdr, args->fh); | |
1012 | ||
1013 | p = xdr_reserve_space(xdr, 8 + 4 + 4 + 4); | |
1014 | p = xdr_encode_hyper(p, args->offset); | |
1015 | *p++ = cpu_to_be32(args->count); | |
d9c407b1 | 1016 | *p++ = cpu_to_be32(args->stable); |
d9c407b1 CL |
1017 | *p = cpu_to_be32(args->count); |
1018 | xdr_write_pages(xdr, args->pages, args->pgbase, args->count); | |
1019 | } | |
1020 | ||
9f06c719 CL |
1021 | static void nfs3_xdr_enc_write3args(struct rpc_rqst *req, |
1022 | struct xdr_stream *xdr, | |
fcc85819 | 1023 | const void *data) |
d9c407b1 | 1024 | { |
fcc85819 CH |
1025 | const struct nfs_pgio_args *args = data; |
1026 | ||
9f06c719 CL |
1027 | encode_write3args(xdr, args); |
1028 | xdr->buf->flags |= XDRBUF_WRITE; | |
d9c407b1 CL |
1029 | } |
1030 | ||
d9c407b1 CL |
1031 | /* |
1032 | * 3.3.8 CREATE3args | |
1033 | * | |
1034 | * enum createmode3 { | |
1035 | * UNCHECKED = 0, | |
1036 | * GUARDED = 1, | |
1037 | * EXCLUSIVE = 2 | |
1038 | * }; | |
1039 | * | |
1040 | * union createhow3 switch (createmode3 mode) { | |
1041 | * case UNCHECKED: | |
1042 | * case GUARDED: | |
1043 | * sattr3 obj_attributes; | |
1044 | * case EXCLUSIVE: | |
1045 | * createverf3 verf; | |
1046 | * }; | |
1047 | * | |
1048 | * struct CREATE3args { | |
1049 | * diropargs3 where; | |
1050 | * createhow3 how; | |
1051 | * }; | |
1052 | */ | |
1053 | static void encode_createhow3(struct xdr_stream *xdr, | |
1054 | const struct nfs3_createargs *args) | |
1055 | { | |
1056 | encode_uint32(xdr, args->createmode); | |
1057 | switch (args->createmode) { | |
1058 | case NFS3_CREATE_UNCHECKED: | |
1059 | case NFS3_CREATE_GUARDED: | |
1060 | encode_sattr3(xdr, args->sattr); | |
1061 | break; | |
1062 | case NFS3_CREATE_EXCLUSIVE: | |
1063 | encode_createverf3(xdr, args->verifier); | |
1064 | break; | |
1065 | default: | |
1066 | BUG(); | |
1067 | } | |
1068 | } | |
1069 | ||
9f06c719 CL |
1070 | static void nfs3_xdr_enc_create3args(struct rpc_rqst *req, |
1071 | struct xdr_stream *xdr, | |
fcc85819 | 1072 | const void *data) |
d9c407b1 | 1073 | { |
fcc85819 CH |
1074 | const struct nfs3_createargs *args = data; |
1075 | ||
9f06c719 CL |
1076 | encode_diropargs3(xdr, args->fh, args->name, args->len); |
1077 | encode_createhow3(xdr, args); | |
d9c407b1 CL |
1078 | } |
1079 | ||
d9c407b1 CL |
1080 | /* |
1081 | * 3.3.9 MKDIR3args | |
1082 | * | |
1083 | * struct MKDIR3args { | |
1084 | * diropargs3 where; | |
1085 | * sattr3 attributes; | |
1086 | * }; | |
1087 | */ | |
9f06c719 CL |
1088 | static void nfs3_xdr_enc_mkdir3args(struct rpc_rqst *req, |
1089 | struct xdr_stream *xdr, | |
fcc85819 | 1090 | const void *data) |
d9c407b1 | 1091 | { |
fcc85819 CH |
1092 | const struct nfs3_mkdirargs *args = data; |
1093 | ||
9f06c719 CL |
1094 | encode_diropargs3(xdr, args->fh, args->name, args->len); |
1095 | encode_sattr3(xdr, args->sattr); | |
d9c407b1 CL |
1096 | } |
1097 | ||
d9c407b1 CL |
1098 | /* |
1099 | * 3.3.10 SYMLINK3args | |
1100 | * | |
1101 | * struct symlinkdata3 { | |
1102 | * sattr3 symlink_attributes; | |
1103 | * nfspath3 symlink_data; | |
1104 | * }; | |
1105 | * | |
1106 | * struct SYMLINK3args { | |
1107 | * diropargs3 where; | |
1108 | * symlinkdata3 symlink; | |
1109 | * }; | |
1110 | */ | |
1111 | static void encode_symlinkdata3(struct xdr_stream *xdr, | |
fcc85819 | 1112 | const void *data) |
d9c407b1 | 1113 | { |
fcc85819 CH |
1114 | const struct nfs3_symlinkargs *args = data; |
1115 | ||
d9c407b1 CL |
1116 | encode_sattr3(xdr, args->sattr); |
1117 | encode_nfspath3(xdr, args->pages, args->pathlen); | |
1118 | } | |
1119 | ||
9f06c719 CL |
1120 | static void nfs3_xdr_enc_symlink3args(struct rpc_rqst *req, |
1121 | struct xdr_stream *xdr, | |
fcc85819 | 1122 | const void *data) |
d9c407b1 | 1123 | { |
fcc85819 CH |
1124 | const struct nfs3_symlinkargs *args = data; |
1125 | ||
9f06c719 CL |
1126 | encode_diropargs3(xdr, args->fromfh, args->fromname, args->fromlen); |
1127 | encode_symlinkdata3(xdr, args); | |
2fcc213a | 1128 | xdr->buf->flags |= XDRBUF_WRITE; |
d9c407b1 CL |
1129 | } |
1130 | ||
d9c407b1 CL |
1131 | /* |
1132 | * 3.3.11 MKNOD3args | |
1133 | * | |
1134 | * struct devicedata3 { | |
1135 | * sattr3 dev_attributes; | |
1136 | * specdata3 spec; | |
1137 | * }; | |
1138 | * | |
1139 | * union mknoddata3 switch (ftype3 type) { | |
1140 | * case NF3CHR: | |
1141 | * case NF3BLK: | |
1142 | * devicedata3 device; | |
1143 | * case NF3SOCK: | |
1144 | * case NF3FIFO: | |
1145 | * sattr3 pipe_attributes; | |
1146 | * default: | |
1147 | * void; | |
1148 | * }; | |
1149 | * | |
1150 | * struct MKNOD3args { | |
1151 | * diropargs3 where; | |
1152 | * mknoddata3 what; | |
1153 | * }; | |
1154 | */ | |
1155 | static void encode_devicedata3(struct xdr_stream *xdr, | |
1156 | const struct nfs3_mknodargs *args) | |
1157 | { | |
1158 | encode_sattr3(xdr, args->sattr); | |
1159 | encode_specdata3(xdr, args->rdev); | |
1160 | } | |
1161 | ||
1162 | static void encode_mknoddata3(struct xdr_stream *xdr, | |
1163 | const struct nfs3_mknodargs *args) | |
1164 | { | |
1165 | encode_ftype3(xdr, args->type); | |
1166 | switch (args->type) { | |
1167 | case NF3CHR: | |
1168 | case NF3BLK: | |
1169 | encode_devicedata3(xdr, args); | |
1170 | break; | |
1171 | case NF3SOCK: | |
1172 | case NF3FIFO: | |
1173 | encode_sattr3(xdr, args->sattr); | |
1174 | break; | |
1175 | case NF3REG: | |
1176 | case NF3DIR: | |
1177 | break; | |
1178 | default: | |
1179 | BUG(); | |
1180 | } | |
1181 | } | |
1182 | ||
9f06c719 CL |
1183 | static void nfs3_xdr_enc_mknod3args(struct rpc_rqst *req, |
1184 | struct xdr_stream *xdr, | |
fcc85819 | 1185 | const void *data) |
d9c407b1 | 1186 | { |
fcc85819 CH |
1187 | const struct nfs3_mknodargs *args = data; |
1188 | ||
9f06c719 CL |
1189 | encode_diropargs3(xdr, args->fh, args->name, args->len); |
1190 | encode_mknoddata3(xdr, args); | |
d9c407b1 CL |
1191 | } |
1192 | ||
1193 | /* | |
1194 | * 3.3.12 REMOVE3args | |
1195 | * | |
1196 | * struct REMOVE3args { | |
1197 | * diropargs3 object; | |
1198 | * }; | |
1199 | */ | |
9f06c719 CL |
1200 | static void nfs3_xdr_enc_remove3args(struct rpc_rqst *req, |
1201 | struct xdr_stream *xdr, | |
fcc85819 | 1202 | const void *data) |
d9c407b1 | 1203 | { |
fcc85819 CH |
1204 | const struct nfs_removeargs *args = data; |
1205 | ||
9f06c719 | 1206 | encode_diropargs3(xdr, args->fh, args->name.name, args->name.len); |
d9c407b1 CL |
1207 | } |
1208 | ||
d9c407b1 CL |
1209 | /* |
1210 | * 3.3.14 RENAME3args | |
1211 | * | |
1212 | * struct RENAME3args { | |
1213 | * diropargs3 from; | |
1214 | * diropargs3 to; | |
1215 | * }; | |
1216 | */ | |
9f06c719 CL |
1217 | static void nfs3_xdr_enc_rename3args(struct rpc_rqst *req, |
1218 | struct xdr_stream *xdr, | |
fcc85819 | 1219 | const void *data) |
d9c407b1 | 1220 | { |
fcc85819 | 1221 | const struct nfs_renameargs *args = data; |
d9c407b1 CL |
1222 | const struct qstr *old = args->old_name; |
1223 | const struct qstr *new = args->new_name; | |
d9c407b1 | 1224 | |
9f06c719 CL |
1225 | encode_diropargs3(xdr, args->old_dir, old->name, old->len); |
1226 | encode_diropargs3(xdr, args->new_dir, new->name, new->len); | |
d9c407b1 CL |
1227 | } |
1228 | ||
d9c407b1 CL |
1229 | /* |
1230 | * 3.3.15 LINK3args | |
1231 | * | |
1232 | * struct LINK3args { | |
1233 | * nfs_fh3 file; | |
1234 | * diropargs3 link; | |
1235 | * }; | |
1236 | */ | |
9f06c719 CL |
1237 | static void nfs3_xdr_enc_link3args(struct rpc_rqst *req, |
1238 | struct xdr_stream *xdr, | |
fcc85819 | 1239 | const void *data) |
d9c407b1 | 1240 | { |
fcc85819 CH |
1241 | const struct nfs3_linkargs *args = data; |
1242 | ||
9f06c719 CL |
1243 | encode_nfs_fh3(xdr, args->fromfh); |
1244 | encode_diropargs3(xdr, args->tofh, args->toname, args->tolen); | |
d9c407b1 CL |
1245 | } |
1246 | ||
d9c407b1 CL |
1247 | /* |
1248 | * 3.3.16 READDIR3args | |
1249 | * | |
1250 | * struct READDIR3args { | |
1251 | * nfs_fh3 dir; | |
1252 | * cookie3 cookie; | |
1253 | * cookieverf3 cookieverf; | |
1254 | * count3 count; | |
1255 | * }; | |
1256 | */ | |
1257 | static void encode_readdir3args(struct xdr_stream *xdr, | |
1258 | const struct nfs3_readdirargs *args) | |
1259 | { | |
1260 | __be32 *p; | |
1261 | ||
1262 | encode_nfs_fh3(xdr, args->fh); | |
1263 | ||
1264 | p = xdr_reserve_space(xdr, 8 + NFS3_COOKIEVERFSIZE + 4); | |
1265 | p = xdr_encode_cookie3(p, args->cookie); | |
1266 | p = xdr_encode_cookieverf3(p, args->verf); | |
1267 | *p = cpu_to_be32(args->count); | |
1268 | } | |
1269 | ||
9f06c719 CL |
1270 | static void nfs3_xdr_enc_readdir3args(struct rpc_rqst *req, |
1271 | struct xdr_stream *xdr, | |
fcc85819 | 1272 | const void *data) |
d9c407b1 | 1273 | { |
fcc85819 CH |
1274 | const struct nfs3_readdirargs *args = data; |
1275 | ||
9f06c719 | 1276 | encode_readdir3args(xdr, args); |
d9c407b1 CL |
1277 | prepare_reply_buffer(req, args->pages, 0, |
1278 | args->count, NFS3_readdirres_sz); | |
d9c407b1 CL |
1279 | } |
1280 | ||
1281 | /* | |
1282 | * 3.3.17 READDIRPLUS3args | |
1283 | * | |
1284 | * struct READDIRPLUS3args { | |
1285 | * nfs_fh3 dir; | |
1286 | * cookie3 cookie; | |
1287 | * cookieverf3 cookieverf; | |
1288 | * count3 dircount; | |
1289 | * count3 maxcount; | |
1290 | * }; | |
1291 | */ | |
1292 | static void encode_readdirplus3args(struct xdr_stream *xdr, | |
1293 | const struct nfs3_readdirargs *args) | |
1294 | { | |
1295 | __be32 *p; | |
1296 | ||
1297 | encode_nfs_fh3(xdr, args->fh); | |
1298 | ||
1299 | p = xdr_reserve_space(xdr, 8 + NFS3_COOKIEVERFSIZE + 4 + 4); | |
1300 | p = xdr_encode_cookie3(p, args->cookie); | |
1301 | p = xdr_encode_cookieverf3(p, args->verf); | |
1302 | ||
1303 | /* | |
1304 | * readdirplus: need dircount + buffer size. | |
1305 | * We just make sure we make dircount big enough | |
1306 | */ | |
1307 | *p++ = cpu_to_be32(args->count >> 3); | |
1308 | ||
1309 | *p = cpu_to_be32(args->count); | |
1310 | } | |
1311 | ||
9f06c719 CL |
1312 | static void nfs3_xdr_enc_readdirplus3args(struct rpc_rqst *req, |
1313 | struct xdr_stream *xdr, | |
fcc85819 | 1314 | const void *data) |
d9c407b1 | 1315 | { |
fcc85819 CH |
1316 | const struct nfs3_readdirargs *args = data; |
1317 | ||
9f06c719 | 1318 | encode_readdirplus3args(xdr, args); |
d9c407b1 CL |
1319 | prepare_reply_buffer(req, args->pages, 0, |
1320 | args->count, NFS3_readdirres_sz); | |
d9c407b1 CL |
1321 | } |
1322 | ||
d9c407b1 CL |
1323 | /* |
1324 | * 3.3.21 COMMIT3args | |
1325 | * | |
1326 | * struct COMMIT3args { | |
1327 | * nfs_fh3 file; | |
1328 | * offset3 offset; | |
1329 | * count3 count; | |
1330 | * }; | |
1331 | */ | |
1332 | static void encode_commit3args(struct xdr_stream *xdr, | |
0b7c0153 | 1333 | const struct nfs_commitargs *args) |
d9c407b1 CL |
1334 | { |
1335 | __be32 *p; | |
1336 | ||
1337 | encode_nfs_fh3(xdr, args->fh); | |
1338 | ||
1339 | p = xdr_reserve_space(xdr, 8 + 4); | |
1340 | p = xdr_encode_hyper(p, args->offset); | |
1341 | *p = cpu_to_be32(args->count); | |
1342 | } | |
1343 | ||
9f06c719 CL |
1344 | static void nfs3_xdr_enc_commit3args(struct rpc_rqst *req, |
1345 | struct xdr_stream *xdr, | |
fcc85819 | 1346 | const void *data) |
d9c407b1 | 1347 | { |
fcc85819 CH |
1348 | const struct nfs_commitargs *args = data; |
1349 | ||
9f06c719 | 1350 | encode_commit3args(xdr, args); |
d9c407b1 CL |
1351 | } |
1352 | ||
b7fa0554 | 1353 | #ifdef CONFIG_NFS_V3_ACL |
b7fa0554 | 1354 | |
9f06c719 CL |
1355 | static void nfs3_xdr_enc_getacl3args(struct rpc_rqst *req, |
1356 | struct xdr_stream *xdr, | |
fcc85819 | 1357 | const void *data) |
d9c407b1 | 1358 | { |
fcc85819 CH |
1359 | const struct nfs3_getaclargs *args = data; |
1360 | ||
9f06c719 CL |
1361 | encode_nfs_fh3(xdr, args->fh); |
1362 | encode_uint32(xdr, args->mask); | |
d9c407b1 CL |
1363 | if (args->mask & (NFS_ACL | NFS_DFACL)) |
1364 | prepare_reply_buffer(req, args->pages, 0, | |
1365 | NFSACL_MAXPAGES << PAGE_SHIFT, | |
1366 | ACL3_getaclres_sz); | |
d9c407b1 CL |
1367 | } |
1368 | ||
9f06c719 CL |
1369 | static void nfs3_xdr_enc_setacl3args(struct rpc_rqst *req, |
1370 | struct xdr_stream *xdr, | |
fcc85819 | 1371 | const void *data) |
d9c407b1 | 1372 | { |
fcc85819 | 1373 | const struct nfs3_setaclargs *args = data; |
d9c407b1 CL |
1374 | unsigned int base; |
1375 | int error; | |
1376 | ||
9f06c719 CL |
1377 | encode_nfs_fh3(xdr, NFS_FH(args->inode)); |
1378 | encode_uint32(xdr, args->mask); | |
ee5dc773 CL |
1379 | |
1380 | base = req->rq_slen; | |
d9c407b1 | 1381 | if (args->npages != 0) |
9f06c719 | 1382 | xdr_write_pages(xdr, args->pages, 0, args->len); |
ee5dc773 | 1383 | else |
d683cc49 | 1384 | xdr_reserve_space(xdr, args->len); |
d9c407b1 | 1385 | |
9f06c719 | 1386 | error = nfsacl_encode(xdr->buf, base, args->inode, |
d9c407b1 CL |
1387 | (args->mask & NFS_ACL) ? |
1388 | args->acl_access : NULL, 1, 0); | |
7fc38846 | 1389 | /* FIXME: this is just broken */ |
d9c407b1 | 1390 | BUG_ON(error < 0); |
9f06c719 | 1391 | error = nfsacl_encode(xdr->buf, base + error, args->inode, |
d9c407b1 CL |
1392 | (args->mask & NFS_DFACL) ? |
1393 | args->acl_default : NULL, 1, | |
1394 | NFS_ACL_DEFAULT); | |
1395 | BUG_ON(error < 0); | |
d9c407b1 CL |
1396 | } |
1397 | ||
b7fa0554 AG |
1398 | #endif /* CONFIG_NFS_V3_ACL */ |
1399 | ||
1da177e4 | 1400 | /* |
b2cdd9c9 CL |
1401 | * NFSv3 XDR decode functions |
1402 | * | |
1403 | * NFSv3 result types are defined in section 3.3 of RFC 1813: | |
1404 | * "NFS Version 3 Protocol Specification". | |
1da177e4 | 1405 | */ |
1da177e4 LT |
1406 | |
1407 | /* | |
e4f93234 CL |
1408 | * 3.3.1 GETATTR3res |
1409 | * | |
1410 | * struct GETATTR3resok { | |
1411 | * fattr3 obj_attributes; | |
1412 | * }; | |
1413 | * | |
1414 | * union GETATTR3res switch (nfsstat3 status) { | |
1415 | * case NFS3_OK: | |
1416 | * GETATTR3resok resok; | |
1417 | * default: | |
1418 | * void; | |
1419 | * }; | |
1da177e4 | 1420 | */ |
bf269551 CL |
1421 | static int nfs3_xdr_dec_getattr3res(struct rpc_rqst *req, |
1422 | struct xdr_stream *xdr, | |
fc016483 | 1423 | void *result) |
1da177e4 | 1424 | { |
e4f93234 CL |
1425 | enum nfs_stat status; |
1426 | int error; | |
1427 | ||
bf269551 | 1428 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1429 | if (unlikely(error)) |
1430 | goto out; | |
1431 | if (status != NFS3_OK) | |
1432 | goto out_default; | |
bf269551 | 1433 | error = decode_fattr3(xdr, result); |
e4f93234 CL |
1434 | out: |
1435 | return error; | |
1436 | out_default: | |
5e7e5a0d | 1437 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1438 | } |
1439 | ||
e4f93234 CL |
1440 | /* |
1441 | * 3.3.2 SETATTR3res | |
1442 | * | |
1443 | * struct SETATTR3resok { | |
1444 | * wcc_data obj_wcc; | |
1445 | * }; | |
1446 | * | |
1447 | * struct SETATTR3resfail { | |
1448 | * wcc_data obj_wcc; | |
1449 | * }; | |
1450 | * | |
1451 | * union SETATTR3res switch (nfsstat3 status) { | |
1452 | * case NFS3_OK: | |
1453 | * SETATTR3resok resok; | |
1454 | * default: | |
1455 | * SETATTR3resfail resfail; | |
1456 | * }; | |
1457 | */ | |
bf269551 CL |
1458 | static int nfs3_xdr_dec_setattr3res(struct rpc_rqst *req, |
1459 | struct xdr_stream *xdr, | |
fc016483 | 1460 | void *result) |
e4f93234 | 1461 | { |
e4f93234 CL |
1462 | enum nfs_stat status; |
1463 | int error; | |
1464 | ||
bf269551 | 1465 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1466 | if (unlikely(error)) |
1467 | goto out; | |
bf269551 | 1468 | error = decode_wcc_data(xdr, result); |
e4f93234 CL |
1469 | if (unlikely(error)) |
1470 | goto out; | |
1471 | if (status != NFS3_OK) | |
1472 | goto out_status; | |
1473 | out: | |
1474 | return error; | |
1475 | out_status: | |
5e7e5a0d | 1476 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1477 | } |
1478 | ||
e4f93234 CL |
1479 | /* |
1480 | * 3.3.3 LOOKUP3res | |
1481 | * | |
1482 | * struct LOOKUP3resok { | |
1483 | * nfs_fh3 object; | |
1484 | * post_op_attr obj_attributes; | |
1485 | * post_op_attr dir_attributes; | |
1486 | * }; | |
1487 | * | |
1488 | * struct LOOKUP3resfail { | |
1489 | * post_op_attr dir_attributes; | |
1490 | * }; | |
1491 | * | |
1492 | * union LOOKUP3res switch (nfsstat3 status) { | |
1493 | * case NFS3_OK: | |
1494 | * LOOKUP3resok resok; | |
1495 | * default: | |
1496 | * LOOKUP3resfail resfail; | |
1497 | * }; | |
1498 | */ | |
bf269551 CL |
1499 | static int nfs3_xdr_dec_lookup3res(struct rpc_rqst *req, |
1500 | struct xdr_stream *xdr, | |
fc016483 | 1501 | void *data) |
e4f93234 | 1502 | { |
fc016483 | 1503 | struct nfs3_diropres *result = data; |
e4f93234 CL |
1504 | enum nfs_stat status; |
1505 | int error; | |
1506 | ||
bf269551 | 1507 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1508 | if (unlikely(error)) |
1509 | goto out; | |
1510 | if (status != NFS3_OK) | |
1511 | goto out_default; | |
bf269551 | 1512 | error = decode_nfs_fh3(xdr, result->fh); |
e4f93234 CL |
1513 | if (unlikely(error)) |
1514 | goto out; | |
bf269551 | 1515 | error = decode_post_op_attr(xdr, result->fattr); |
e4f93234 CL |
1516 | if (unlikely(error)) |
1517 | goto out; | |
bf269551 | 1518 | error = decode_post_op_attr(xdr, result->dir_attr); |
e4f93234 CL |
1519 | out: |
1520 | return error; | |
1521 | out_default: | |
bf269551 | 1522 | error = decode_post_op_attr(xdr, result->dir_attr); |
e4f93234 CL |
1523 | if (unlikely(error)) |
1524 | goto out; | |
5e7e5a0d | 1525 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1526 | } |
1527 | ||
e4f93234 CL |
1528 | /* |
1529 | * 3.3.4 ACCESS3res | |
1530 | * | |
1531 | * struct ACCESS3resok { | |
1532 | * post_op_attr obj_attributes; | |
1533 | * uint32 access; | |
1534 | * }; | |
1535 | * | |
1536 | * struct ACCESS3resfail { | |
1537 | * post_op_attr obj_attributes; | |
1538 | * }; | |
1539 | * | |
1540 | * union ACCESS3res switch (nfsstat3 status) { | |
1541 | * case NFS3_OK: | |
1542 | * ACCESS3resok resok; | |
1543 | * default: | |
1544 | * ACCESS3resfail resfail; | |
1545 | * }; | |
1546 | */ | |
bf269551 CL |
1547 | static int nfs3_xdr_dec_access3res(struct rpc_rqst *req, |
1548 | struct xdr_stream *xdr, | |
fc016483 | 1549 | void *data) |
e4f93234 | 1550 | { |
fc016483 | 1551 | struct nfs3_accessres *result = data; |
e4f93234 CL |
1552 | enum nfs_stat status; |
1553 | int error; | |
1554 | ||
bf269551 | 1555 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1556 | if (unlikely(error)) |
1557 | goto out; | |
bf269551 | 1558 | error = decode_post_op_attr(xdr, result->fattr); |
e4f93234 CL |
1559 | if (unlikely(error)) |
1560 | goto out; | |
1561 | if (status != NFS3_OK) | |
1562 | goto out_default; | |
bf269551 | 1563 | error = decode_uint32(xdr, &result->access); |
e4f93234 CL |
1564 | out: |
1565 | return error; | |
1566 | out_default: | |
5e7e5a0d | 1567 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1568 | } |
1569 | ||
e4f93234 CL |
1570 | /* |
1571 | * 3.3.5 READLINK3res | |
1572 | * | |
1573 | * struct READLINK3resok { | |
1574 | * post_op_attr symlink_attributes; | |
1575 | * nfspath3 data; | |
1576 | * }; | |
1577 | * | |
1578 | * struct READLINK3resfail { | |
1579 | * post_op_attr symlink_attributes; | |
1580 | * }; | |
1581 | * | |
1582 | * union READLINK3res switch (nfsstat3 status) { | |
1583 | * case NFS3_OK: | |
1584 | * READLINK3resok resok; | |
1585 | * default: | |
1586 | * READLINK3resfail resfail; | |
1587 | * }; | |
1588 | */ | |
bf269551 CL |
1589 | static int nfs3_xdr_dec_readlink3res(struct rpc_rqst *req, |
1590 | struct xdr_stream *xdr, | |
fc016483 | 1591 | void *result) |
e4f93234 | 1592 | { |
e4f93234 CL |
1593 | enum nfs_stat status; |
1594 | int error; | |
1595 | ||
bf269551 | 1596 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1597 | if (unlikely(error)) |
1598 | goto out; | |
bf269551 | 1599 | error = decode_post_op_attr(xdr, result); |
e4f93234 CL |
1600 | if (unlikely(error)) |
1601 | goto out; | |
1602 | if (status != NFS3_OK) | |
1603 | goto out_default; | |
bf269551 | 1604 | error = decode_nfspath3(xdr); |
e4f93234 CL |
1605 | out: |
1606 | return error; | |
1607 | out_default: | |
5e7e5a0d | 1608 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1609 | } |
1610 | ||
e4f93234 CL |
1611 | /* |
1612 | * 3.3.6 READ3res | |
1613 | * | |
1614 | * struct READ3resok { | |
1615 | * post_op_attr file_attributes; | |
1616 | * count3 count; | |
1617 | * bool eof; | |
1618 | * opaque data<>; | |
1619 | * }; | |
1620 | * | |
1621 | * struct READ3resfail { | |
1622 | * post_op_attr file_attributes; | |
1623 | * }; | |
1624 | * | |
1625 | * union READ3res switch (nfsstat3 status) { | |
1626 | * case NFS3_OK: | |
1627 | * READ3resok resok; | |
1628 | * default: | |
1629 | * READ3resfail resfail; | |
1630 | * }; | |
1631 | */ | |
1632 | static int decode_read3resok(struct xdr_stream *xdr, | |
9137bdf3 | 1633 | struct nfs_pgio_res *result) |
e4f93234 CL |
1634 | { |
1635 | u32 eof, count, ocount, recvd; | |
e4f93234 CL |
1636 | __be32 *p; |
1637 | ||
1638 | p = xdr_inline_decode(xdr, 4 + 4 + 4); | |
1639 | if (unlikely(p == NULL)) | |
1640 | goto out_overflow; | |
1641 | count = be32_to_cpup(p++); | |
1642 | eof = be32_to_cpup(p++); | |
1643 | ocount = be32_to_cpup(p++); | |
1644 | if (unlikely(ocount != count)) | |
1645 | goto out_mismatch; | |
64bd577e | 1646 | recvd = xdr_read_pages(xdr, count); |
e4f93234 CL |
1647 | if (unlikely(count > recvd)) |
1648 | goto out_cheating; | |
e4f93234 | 1649 | out: |
e4f93234 CL |
1650 | result->eof = eof; |
1651 | result->count = count; | |
1652 | return count; | |
1653 | out_mismatch: | |
1654 | dprintk("NFS: READ count doesn't match length of opaque: " | |
1655 | "count %u != ocount %u\n", count, ocount); | |
1656 | return -EIO; | |
1657 | out_cheating: | |
1658 | dprintk("NFS: server cheating in read result: " | |
1659 | "count %u > recvd %u\n", count, recvd); | |
1660 | count = recvd; | |
1661 | eof = 0; | |
1662 | goto out; | |
1663 | out_overflow: | |
1664 | print_overflow_msg(__func__, xdr); | |
1665 | return -EIO; | |
1666 | } | |
1667 | ||
bf269551 | 1668 | static int nfs3_xdr_dec_read3res(struct rpc_rqst *req, struct xdr_stream *xdr, |
fc016483 | 1669 | void *data) |
e4f93234 | 1670 | { |
fc016483 | 1671 | struct nfs_pgio_res *result = data; |
e4f93234 CL |
1672 | enum nfs_stat status; |
1673 | int error; | |
1674 | ||
bf269551 | 1675 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1676 | if (unlikely(error)) |
1677 | goto out; | |
bf269551 | 1678 | error = decode_post_op_attr(xdr, result->fattr); |
e4f93234 CL |
1679 | if (unlikely(error)) |
1680 | goto out; | |
aabff4dd | 1681 | result->op_status = status; |
e4f93234 CL |
1682 | if (status != NFS3_OK) |
1683 | goto out_status; | |
bf269551 | 1684 | error = decode_read3resok(xdr, result); |
e4f93234 CL |
1685 | out: |
1686 | return error; | |
1687 | out_status: | |
5e7e5a0d | 1688 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1689 | } |
1690 | ||
e4f93234 CL |
1691 | /* |
1692 | * 3.3.7 WRITE3res | |
1693 | * | |
1694 | * enum stable_how { | |
1695 | * UNSTABLE = 0, | |
1696 | * DATA_SYNC = 1, | |
1697 | * FILE_SYNC = 2 | |
1698 | * }; | |
1699 | * | |
1700 | * struct WRITE3resok { | |
1701 | * wcc_data file_wcc; | |
1702 | * count3 count; | |
1703 | * stable_how committed; | |
1704 | * writeverf3 verf; | |
1705 | * }; | |
1706 | * | |
1707 | * struct WRITE3resfail { | |
1708 | * wcc_data file_wcc; | |
1709 | * }; | |
1710 | * | |
1711 | * union WRITE3res switch (nfsstat3 status) { | |
1712 | * case NFS3_OK: | |
1713 | * WRITE3resok resok; | |
1714 | * default: | |
1715 | * WRITE3resfail resfail; | |
1716 | * }; | |
1717 | */ | |
1718 | static int decode_write3resok(struct xdr_stream *xdr, | |
9137bdf3 | 1719 | struct nfs_pgio_res *result) |
e4f93234 CL |
1720 | { |
1721 | __be32 *p; | |
1722 | ||
2f2c63bc | 1723 | p = xdr_inline_decode(xdr, 4 + 4); |
e4f93234 CL |
1724 | if (unlikely(p == NULL)) |
1725 | goto out_overflow; | |
1726 | result->count = be32_to_cpup(p++); | |
1727 | result->verf->committed = be32_to_cpup(p++); | |
1728 | if (unlikely(result->verf->committed > NFS_FILE_SYNC)) | |
1729 | goto out_badvalue; | |
2f2c63bc TM |
1730 | if (decode_writeverf3(xdr, &result->verf->verifier)) |
1731 | goto out_eio; | |
e4f93234 CL |
1732 | return result->count; |
1733 | out_badvalue: | |
1734 | dprintk("NFS: bad stable_how value: %u\n", result->verf->committed); | |
1735 | return -EIO; | |
1736 | out_overflow: | |
1737 | print_overflow_msg(__func__, xdr); | |
2f2c63bc | 1738 | out_eio: |
e4f93234 CL |
1739 | return -EIO; |
1740 | } | |
1741 | ||
bf269551 | 1742 | static int nfs3_xdr_dec_write3res(struct rpc_rqst *req, struct xdr_stream *xdr, |
fc016483 | 1743 | void *data) |
e4f93234 | 1744 | { |
fc016483 | 1745 | struct nfs_pgio_res *result = data; |
e4f93234 CL |
1746 | enum nfs_stat status; |
1747 | int error; | |
1748 | ||
bf269551 | 1749 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1750 | if (unlikely(error)) |
1751 | goto out; | |
bf269551 | 1752 | error = decode_wcc_data(xdr, result->fattr); |
e4f93234 CL |
1753 | if (unlikely(error)) |
1754 | goto out; | |
aabff4dd | 1755 | result->op_status = status; |
e4f93234 CL |
1756 | if (status != NFS3_OK) |
1757 | goto out_status; | |
bf269551 | 1758 | error = decode_write3resok(xdr, result); |
e4f93234 CL |
1759 | out: |
1760 | return error; | |
1761 | out_status: | |
5e7e5a0d | 1762 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1763 | } |
1764 | ||
e4f93234 CL |
1765 | /* |
1766 | * 3.3.8 CREATE3res | |
1767 | * | |
1768 | * struct CREATE3resok { | |
1769 | * post_op_fh3 obj; | |
1770 | * post_op_attr obj_attributes; | |
1771 | * wcc_data dir_wcc; | |
1772 | * }; | |
1773 | * | |
1774 | * struct CREATE3resfail { | |
1775 | * wcc_data dir_wcc; | |
1776 | * }; | |
1777 | * | |
1778 | * union CREATE3res switch (nfsstat3 status) { | |
1779 | * case NFS3_OK: | |
1780 | * CREATE3resok resok; | |
1781 | * default: | |
1782 | * CREATE3resfail resfail; | |
1783 | * }; | |
1784 | */ | |
1785 | static int decode_create3resok(struct xdr_stream *xdr, | |
1786 | struct nfs3_diropres *result) | |
1787 | { | |
1788 | int error; | |
1789 | ||
1790 | error = decode_post_op_fh3(xdr, result->fh); | |
1791 | if (unlikely(error)) | |
1792 | goto out; | |
1793 | error = decode_post_op_attr(xdr, result->fattr); | |
1794 | if (unlikely(error)) | |
1795 | goto out; | |
1796 | /* The server isn't required to return a file handle. | |
1797 | * If it didn't, force the client to perform a LOOKUP | |
1798 | * to determine the correct file handle and attribute | |
1799 | * values for the new object. */ | |
1800 | if (result->fh->size == 0) | |
1801 | result->fattr->valid = 0; | |
1802 | error = decode_wcc_data(xdr, result->dir_attr); | |
1803 | out: | |
1804 | return error; | |
1805 | } | |
1806 | ||
bf269551 CL |
1807 | static int nfs3_xdr_dec_create3res(struct rpc_rqst *req, |
1808 | struct xdr_stream *xdr, | |
fc016483 | 1809 | void *data) |
e4f93234 | 1810 | { |
fc016483 | 1811 | struct nfs3_diropres *result = data; |
e4f93234 CL |
1812 | enum nfs_stat status; |
1813 | int error; | |
1814 | ||
bf269551 | 1815 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1816 | if (unlikely(error)) |
1817 | goto out; | |
1818 | if (status != NFS3_OK) | |
1819 | goto out_default; | |
bf269551 | 1820 | error = decode_create3resok(xdr, result); |
e4f93234 CL |
1821 | out: |
1822 | return error; | |
1823 | out_default: | |
bf269551 | 1824 | error = decode_wcc_data(xdr, result->dir_attr); |
e4f93234 CL |
1825 | if (unlikely(error)) |
1826 | goto out; | |
5e7e5a0d | 1827 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1828 | } |
1829 | ||
1830 | /* | |
1831 | * 3.3.12 REMOVE3res | |
1832 | * | |
1833 | * struct REMOVE3resok { | |
1834 | * wcc_data dir_wcc; | |
1835 | * }; | |
1836 | * | |
1837 | * struct REMOVE3resfail { | |
1838 | * wcc_data dir_wcc; | |
1839 | * }; | |
1840 | * | |
1841 | * union REMOVE3res switch (nfsstat3 status) { | |
1842 | * case NFS3_OK: | |
1843 | * REMOVE3resok resok; | |
1844 | * default: | |
1845 | * REMOVE3resfail resfail; | |
1846 | * }; | |
1847 | */ | |
bf269551 CL |
1848 | static int nfs3_xdr_dec_remove3res(struct rpc_rqst *req, |
1849 | struct xdr_stream *xdr, | |
fc016483 | 1850 | void *data) |
e4f93234 | 1851 | { |
fc016483 | 1852 | struct nfs_removeres *result = data; |
e4f93234 CL |
1853 | enum nfs_stat status; |
1854 | int error; | |
1855 | ||
bf269551 | 1856 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1857 | if (unlikely(error)) |
1858 | goto out; | |
bf269551 | 1859 | error = decode_wcc_data(xdr, result->dir_attr); |
e4f93234 CL |
1860 | if (unlikely(error)) |
1861 | goto out; | |
1862 | if (status != NFS3_OK) | |
1863 | goto out_status; | |
1864 | out: | |
1865 | return error; | |
1866 | out_status: | |
5e7e5a0d | 1867 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1868 | } |
1869 | ||
e4f93234 CL |
1870 | /* |
1871 | * 3.3.14 RENAME3res | |
1872 | * | |
1873 | * struct RENAME3resok { | |
1874 | * wcc_data fromdir_wcc; | |
1875 | * wcc_data todir_wcc; | |
1876 | * }; | |
1877 | * | |
1878 | * struct RENAME3resfail { | |
1879 | * wcc_data fromdir_wcc; | |
1880 | * wcc_data todir_wcc; | |
1881 | * }; | |
1882 | * | |
1883 | * union RENAME3res switch (nfsstat3 status) { | |
1884 | * case NFS3_OK: | |
1885 | * RENAME3resok resok; | |
1886 | * default: | |
1887 | * RENAME3resfail resfail; | |
1888 | * }; | |
1889 | */ | |
bf269551 CL |
1890 | static int nfs3_xdr_dec_rename3res(struct rpc_rqst *req, |
1891 | struct xdr_stream *xdr, | |
fc016483 | 1892 | void *data) |
e4f93234 | 1893 | { |
fc016483 | 1894 | struct nfs_renameres *result = data; |
e4f93234 CL |
1895 | enum nfs_stat status; |
1896 | int error; | |
1897 | ||
bf269551 | 1898 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1899 | if (unlikely(error)) |
1900 | goto out; | |
bf269551 | 1901 | error = decode_wcc_data(xdr, result->old_fattr); |
e4f93234 CL |
1902 | if (unlikely(error)) |
1903 | goto out; | |
bf269551 | 1904 | error = decode_wcc_data(xdr, result->new_fattr); |
e4f93234 CL |
1905 | if (unlikely(error)) |
1906 | goto out; | |
1907 | if (status != NFS3_OK) | |
1908 | goto out_status; | |
1909 | out: | |
1910 | return error; | |
1911 | out_status: | |
5e7e5a0d | 1912 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1913 | } |
1914 | ||
e4f93234 CL |
1915 | /* |
1916 | * 3.3.15 LINK3res | |
1917 | * | |
1918 | * struct LINK3resok { | |
1919 | * post_op_attr file_attributes; | |
1920 | * wcc_data linkdir_wcc; | |
1921 | * }; | |
1922 | * | |
1923 | * struct LINK3resfail { | |
1924 | * post_op_attr file_attributes; | |
1925 | * wcc_data linkdir_wcc; | |
1926 | * }; | |
1927 | * | |
1928 | * union LINK3res switch (nfsstat3 status) { | |
1929 | * case NFS3_OK: | |
1930 | * LINK3resok resok; | |
1931 | * default: | |
1932 | * LINK3resfail resfail; | |
1933 | * }; | |
1934 | */ | |
bf269551 | 1935 | static int nfs3_xdr_dec_link3res(struct rpc_rqst *req, struct xdr_stream *xdr, |
fc016483 | 1936 | void *data) |
e4f93234 | 1937 | { |
fc016483 | 1938 | struct nfs3_linkres *result = data; |
e4f93234 CL |
1939 | enum nfs_stat status; |
1940 | int error; | |
1941 | ||
bf269551 | 1942 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1943 | if (unlikely(error)) |
1944 | goto out; | |
bf269551 | 1945 | error = decode_post_op_attr(xdr, result->fattr); |
e4f93234 CL |
1946 | if (unlikely(error)) |
1947 | goto out; | |
bf269551 | 1948 | error = decode_wcc_data(xdr, result->dir_attr); |
e4f93234 CL |
1949 | if (unlikely(error)) |
1950 | goto out; | |
1951 | if (status != NFS3_OK) | |
1952 | goto out_status; | |
1953 | out: | |
1954 | return error; | |
1955 | out_status: | |
5e7e5a0d | 1956 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1957 | } |
1958 | ||
1959 | /** | |
1960 | * nfs3_decode_dirent - Decode a single NFSv3 directory entry stored in | |
1961 | * the local page cache | |
1962 | * @xdr: XDR stream where entry resides | |
1963 | * @entry: buffer to fill in with entry data | |
e4f93234 CL |
1964 | * @plus: boolean indicating whether this should be a readdirplus entry |
1965 | * | |
573c4e1e CL |
1966 | * Returns zero if successful, otherwise a negative errno value is |
1967 | * returned. | |
e4f93234 CL |
1968 | * |
1969 | * This function is not invoked during READDIR reply decoding, but | |
1970 | * rather whenever an application invokes the getdents(2) system call | |
1971 | * on a directory already in our cache. | |
1972 | * | |
1973 | * 3.3.16 entry3 | |
1974 | * | |
1975 | * struct entry3 { | |
1976 | * fileid3 fileid; | |
1977 | * filename3 name; | |
1978 | * cookie3 cookie; | |
1979 | * fhandle3 filehandle; | |
1980 | * post_op_attr3 attributes; | |
1981 | * entry3 *nextentry; | |
1982 | * }; | |
1983 | * | |
1984 | * 3.3.17 entryplus3 | |
1985 | * struct entryplus3 { | |
1986 | * fileid3 fileid; | |
1987 | * filename3 name; | |
1988 | * cookie3 cookie; | |
1989 | * post_op_attr name_attributes; | |
1990 | * post_op_fh3 name_handle; | |
1991 | * entryplus3 *nextentry; | |
1992 | * }; | |
1993 | */ | |
573c4e1e | 1994 | int nfs3_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, |
a7a3b1e9 | 1995 | bool plus) |
e4f93234 CL |
1996 | { |
1997 | struct nfs_entry old = *entry; | |
1998 | __be32 *p; | |
1999 | int error; | |
2000 | ||
2001 | p = xdr_inline_decode(xdr, 4); | |
2002 | if (unlikely(p == NULL)) | |
2003 | goto out_overflow; | |
2004 | if (*p == xdr_zero) { | |
2005 | p = xdr_inline_decode(xdr, 4); | |
2006 | if (unlikely(p == NULL)) | |
2007 | goto out_overflow; | |
2008 | if (*p == xdr_zero) | |
573c4e1e | 2009 | return -EAGAIN; |
e4f93234 | 2010 | entry->eof = 1; |
573c4e1e | 2011 | return -EBADCOOKIE; |
e4f93234 CL |
2012 | } |
2013 | ||
2014 | error = decode_fileid3(xdr, &entry->ino); | |
2015 | if (unlikely(error)) | |
573c4e1e | 2016 | return error; |
e4f93234 CL |
2017 | |
2018 | error = decode_inline_filename3(xdr, &entry->name, &entry->len); | |
2019 | if (unlikely(error)) | |
573c4e1e | 2020 | return error; |
e4f93234 CL |
2021 | |
2022 | entry->prev_cookie = entry->cookie; | |
2023 | error = decode_cookie3(xdr, &entry->cookie); | |
2024 | if (unlikely(error)) | |
573c4e1e | 2025 | return error; |
e4f93234 CL |
2026 | |
2027 | entry->d_type = DT_UNKNOWN; | |
2028 | ||
2029 | if (plus) { | |
2030 | entry->fattr->valid = 0; | |
2031 | error = decode_post_op_attr(xdr, entry->fattr); | |
2032 | if (unlikely(error)) | |
573c4e1e | 2033 | return error; |
e4f93234 CL |
2034 | if (entry->fattr->valid & NFS_ATTR_FATTR_V3) |
2035 | entry->d_type = nfs_umode_to_dtype(entry->fattr->mode); | |
2036 | ||
1ae04b25 TM |
2037 | if (entry->fattr->fileid != entry->ino) { |
2038 | entry->fattr->mounted_on_fileid = entry->ino; | |
2039 | entry->fattr->valid |= NFS_ATTR_FATTR_MOUNTED_ON_FILEID; | |
2040 | } | |
2041 | ||
e4f93234 CL |
2042 | /* In fact, a post_op_fh3: */ |
2043 | p = xdr_inline_decode(xdr, 4); | |
2044 | if (unlikely(p == NULL)) | |
2045 | goto out_overflow; | |
2046 | if (*p != xdr_zero) { | |
2047 | error = decode_nfs_fh3(xdr, entry->fh); | |
2048 | if (unlikely(error)) { | |
2049 | if (error == -E2BIG) | |
2050 | goto out_truncated; | |
573c4e1e | 2051 | return error; |
e4f93234 CL |
2052 | } |
2053 | } else | |
2054 | zero_nfs_fh3(entry->fh); | |
2055 | } | |
2056 | ||
573c4e1e | 2057 | return 0; |
e4f93234 CL |
2058 | |
2059 | out_overflow: | |
2060 | print_overflow_msg(__func__, xdr); | |
573c4e1e | 2061 | return -EAGAIN; |
e4f93234 CL |
2062 | out_truncated: |
2063 | dprintk("NFS: directory entry contains invalid file handle\n"); | |
2064 | *entry = old; | |
573c4e1e | 2065 | return -EAGAIN; |
e4f93234 CL |
2066 | } |
2067 | ||
2068 | /* | |
2069 | * 3.3.16 READDIR3res | |
2070 | * | |
2071 | * struct dirlist3 { | |
2072 | * entry3 *entries; | |
2073 | * bool eof; | |
2074 | * }; | |
2075 | * | |
2076 | * struct READDIR3resok { | |
2077 | * post_op_attr dir_attributes; | |
2078 | * cookieverf3 cookieverf; | |
2079 | * dirlist3 reply; | |
2080 | * }; | |
2081 | * | |
2082 | * struct READDIR3resfail { | |
2083 | * post_op_attr dir_attributes; | |
2084 | * }; | |
2085 | * | |
2086 | * union READDIR3res switch (nfsstat3 status) { | |
2087 | * case NFS3_OK: | |
2088 | * READDIR3resok resok; | |
2089 | * default: | |
2090 | * READDIR3resfail resfail; | |
2091 | * }; | |
2092 | * | |
2093 | * Read the directory contents into the page cache, but otherwise | |
2094 | * don't touch them. The actual decoding is done by nfs3_decode_entry() | |
2095 | * during subsequent nfs_readdir() calls. | |
2096 | */ | |
2097 | static int decode_dirlist3(struct xdr_stream *xdr) | |
2098 | { | |
64bd577e | 2099 | return xdr_read_pages(xdr, xdr->buf->page_len); |
e4f93234 CL |
2100 | } |
2101 | ||
2102 | static int decode_readdir3resok(struct xdr_stream *xdr, | |
2103 | struct nfs3_readdirres *result) | |
2104 | { | |
2105 | int error; | |
2106 | ||
2107 | error = decode_post_op_attr(xdr, result->dir_attr); | |
2108 | if (unlikely(error)) | |
2109 | goto out; | |
2110 | /* XXX: do we need to check if result->verf != NULL ? */ | |
2111 | error = decode_cookieverf3(xdr, result->verf); | |
2112 | if (unlikely(error)) | |
2113 | goto out; | |
2114 | error = decode_dirlist3(xdr); | |
2115 | out: | |
2116 | return error; | |
2117 | } | |
2118 | ||
bf269551 CL |
2119 | static int nfs3_xdr_dec_readdir3res(struct rpc_rqst *req, |
2120 | struct xdr_stream *xdr, | |
fc016483 | 2121 | void *data) |
e4f93234 | 2122 | { |
fc016483 | 2123 | struct nfs3_readdirres *result = data; |
e4f93234 CL |
2124 | enum nfs_stat status; |
2125 | int error; | |
2126 | ||
bf269551 | 2127 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
2128 | if (unlikely(error)) |
2129 | goto out; | |
2130 | if (status != NFS3_OK) | |
2131 | goto out_default; | |
bf269551 | 2132 | error = decode_readdir3resok(xdr, result); |
e4f93234 CL |
2133 | out: |
2134 | return error; | |
2135 | out_default: | |
bf269551 | 2136 | error = decode_post_op_attr(xdr, result->dir_attr); |
e4f93234 CL |
2137 | if (unlikely(error)) |
2138 | goto out; | |
5e7e5a0d | 2139 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
2140 | } |
2141 | ||
e4f93234 CL |
2142 | /* |
2143 | * 3.3.18 FSSTAT3res | |
2144 | * | |
2145 | * struct FSSTAT3resok { | |
2146 | * post_op_attr obj_attributes; | |
2147 | * size3 tbytes; | |
2148 | * size3 fbytes; | |
2149 | * size3 abytes; | |
2150 | * size3 tfiles; | |
2151 | * size3 ffiles; | |
2152 | * size3 afiles; | |
2153 | * uint32 invarsec; | |
2154 | * }; | |
2155 | * | |
2156 | * struct FSSTAT3resfail { | |
2157 | * post_op_attr obj_attributes; | |
2158 | * }; | |
2159 | * | |
2160 | * union FSSTAT3res switch (nfsstat3 status) { | |
2161 | * case NFS3_OK: | |
2162 | * FSSTAT3resok resok; | |
2163 | * default: | |
2164 | * FSSTAT3resfail resfail; | |
2165 | * }; | |
2166 | */ | |
2167 | static int decode_fsstat3resok(struct xdr_stream *xdr, | |
2168 | struct nfs_fsstat *result) | |
2169 | { | |
2170 | __be32 *p; | |
2171 | ||
2172 | p = xdr_inline_decode(xdr, 8 * 6 + 4); | |
2173 | if (unlikely(p == NULL)) | |
2174 | goto out_overflow; | |
2175 | p = xdr_decode_size3(p, &result->tbytes); | |
2176 | p = xdr_decode_size3(p, &result->fbytes); | |
2177 | p = xdr_decode_size3(p, &result->abytes); | |
2178 | p = xdr_decode_size3(p, &result->tfiles); | |
2179 | p = xdr_decode_size3(p, &result->ffiles); | |
2180 | xdr_decode_size3(p, &result->afiles); | |
2181 | /* ignore invarsec */ | |
2182 | return 0; | |
2183 | out_overflow: | |
2184 | print_overflow_msg(__func__, xdr); | |
2185 | return -EIO; | |
2186 | } | |
2187 | ||
bf269551 CL |
2188 | static int nfs3_xdr_dec_fsstat3res(struct rpc_rqst *req, |
2189 | struct xdr_stream *xdr, | |
fc016483 | 2190 | void *data) |
e4f93234 | 2191 | { |
fc016483 | 2192 | struct nfs_fsstat *result = data; |
e4f93234 CL |
2193 | enum nfs_stat status; |
2194 | int error; | |
2195 | ||
bf269551 | 2196 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
2197 | if (unlikely(error)) |
2198 | goto out; | |
bf269551 | 2199 | error = decode_post_op_attr(xdr, result->fattr); |
e4f93234 CL |
2200 | if (unlikely(error)) |
2201 | goto out; | |
2202 | if (status != NFS3_OK) | |
2203 | goto out_status; | |
bf269551 | 2204 | error = decode_fsstat3resok(xdr, result); |
e4f93234 CL |
2205 | out: |
2206 | return error; | |
2207 | out_status: | |
5e7e5a0d | 2208 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
2209 | } |
2210 | ||
e4f93234 CL |
2211 | /* |
2212 | * 3.3.19 FSINFO3res | |
2213 | * | |
2214 | * struct FSINFO3resok { | |
2215 | * post_op_attr obj_attributes; | |
2216 | * uint32 rtmax; | |
2217 | * uint32 rtpref; | |
2218 | * uint32 rtmult; | |
2219 | * uint32 wtmax; | |
2220 | * uint32 wtpref; | |
2221 | * uint32 wtmult; | |
2222 | * uint32 dtpref; | |
2223 | * size3 maxfilesize; | |
2224 | * nfstime3 time_delta; | |
2225 | * uint32 properties; | |
2226 | * }; | |
2227 | * | |
2228 | * struct FSINFO3resfail { | |
2229 | * post_op_attr obj_attributes; | |
2230 | * }; | |
2231 | * | |
2232 | * union FSINFO3res switch (nfsstat3 status) { | |
2233 | * case NFS3_OK: | |
2234 | * FSINFO3resok resok; | |
2235 | * default: | |
2236 | * FSINFO3resfail resfail; | |
2237 | * }; | |
2238 | */ | |
2239 | static int decode_fsinfo3resok(struct xdr_stream *xdr, | |
2240 | struct nfs_fsinfo *result) | |
2241 | { | |
2242 | __be32 *p; | |
2243 | ||
2244 | p = xdr_inline_decode(xdr, 4 * 7 + 8 + 8 + 4); | |
2245 | if (unlikely(p == NULL)) | |
2246 | goto out_overflow; | |
2247 | result->rtmax = be32_to_cpup(p++); | |
2248 | result->rtpref = be32_to_cpup(p++); | |
2249 | result->rtmult = be32_to_cpup(p++); | |
2250 | result->wtmax = be32_to_cpup(p++); | |
2251 | result->wtpref = be32_to_cpup(p++); | |
2252 | result->wtmult = be32_to_cpup(p++); | |
2253 | result->dtpref = be32_to_cpup(p++); | |
2254 | p = xdr_decode_size3(p, &result->maxfilesize); | |
f6048709 | 2255 | xdr_decode_nfstime3(p, &result->time_delta); |
e4f93234 CL |
2256 | |
2257 | /* ignore properties */ | |
2258 | result->lease_time = 0; | |
2259 | return 0; | |
2260 | out_overflow: | |
2261 | print_overflow_msg(__func__, xdr); | |
2262 | return -EIO; | |
2263 | } | |
2264 | ||
bf269551 CL |
2265 | static int nfs3_xdr_dec_fsinfo3res(struct rpc_rqst *req, |
2266 | struct xdr_stream *xdr, | |
fc016483 | 2267 | void *data) |
e4f93234 | 2268 | { |
fc016483 | 2269 | struct nfs_fsinfo *result = data; |
e4f93234 CL |
2270 | enum nfs_stat status; |
2271 | int error; | |
2272 | ||
bf269551 | 2273 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
2274 | if (unlikely(error)) |
2275 | goto out; | |
bf269551 | 2276 | error = decode_post_op_attr(xdr, result->fattr); |
e4f93234 CL |
2277 | if (unlikely(error)) |
2278 | goto out; | |
2279 | if (status != NFS3_OK) | |
2280 | goto out_status; | |
bf269551 | 2281 | error = decode_fsinfo3resok(xdr, result); |
e4f93234 CL |
2282 | out: |
2283 | return error; | |
2284 | out_status: | |
5e7e5a0d | 2285 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
2286 | } |
2287 | ||
e4f93234 CL |
2288 | /* |
2289 | * 3.3.20 PATHCONF3res | |
2290 | * | |
2291 | * struct PATHCONF3resok { | |
2292 | * post_op_attr obj_attributes; | |
2293 | * uint32 linkmax; | |
2294 | * uint32 name_max; | |
2295 | * bool no_trunc; | |
2296 | * bool chown_restricted; | |
2297 | * bool case_insensitive; | |
2298 | * bool case_preserving; | |
2299 | * }; | |
2300 | * | |
2301 | * struct PATHCONF3resfail { | |
2302 | * post_op_attr obj_attributes; | |
2303 | * }; | |
2304 | * | |
2305 | * union PATHCONF3res switch (nfsstat3 status) { | |
2306 | * case NFS3_OK: | |
2307 | * PATHCONF3resok resok; | |
2308 | * default: | |
2309 | * PATHCONF3resfail resfail; | |
2310 | * }; | |
2311 | */ | |
2312 | static int decode_pathconf3resok(struct xdr_stream *xdr, | |
2313 | struct nfs_pathconf *result) | |
2314 | { | |
2315 | __be32 *p; | |
2316 | ||
2317 | p = xdr_inline_decode(xdr, 4 * 6); | |
2318 | if (unlikely(p == NULL)) | |
2319 | goto out_overflow; | |
2320 | result->max_link = be32_to_cpup(p++); | |
2321 | result->max_namelen = be32_to_cpup(p); | |
2322 | /* ignore remaining fields */ | |
2323 | return 0; | |
2324 | out_overflow: | |
2325 | print_overflow_msg(__func__, xdr); | |
2326 | return -EIO; | |
2327 | } | |
2328 | ||
bf269551 CL |
2329 | static int nfs3_xdr_dec_pathconf3res(struct rpc_rqst *req, |
2330 | struct xdr_stream *xdr, | |
fc016483 | 2331 | void *data) |
e4f93234 | 2332 | { |
fc016483 | 2333 | struct nfs_pathconf *result = data; |
e4f93234 CL |
2334 | enum nfs_stat status; |
2335 | int error; | |
2336 | ||
bf269551 | 2337 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
2338 | if (unlikely(error)) |
2339 | goto out; | |
bf269551 | 2340 | error = decode_post_op_attr(xdr, result->fattr); |
e4f93234 CL |
2341 | if (unlikely(error)) |
2342 | goto out; | |
2343 | if (status != NFS3_OK) | |
2344 | goto out_status; | |
bf269551 | 2345 | error = decode_pathconf3resok(xdr, result); |
e4f93234 CL |
2346 | out: |
2347 | return error; | |
2348 | out_status: | |
5e7e5a0d | 2349 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
2350 | } |
2351 | ||
e4f93234 CL |
2352 | /* |
2353 | * 3.3.21 COMMIT3res | |
2354 | * | |
2355 | * struct COMMIT3resok { | |
2356 | * wcc_data file_wcc; | |
2357 | * writeverf3 verf; | |
2358 | * }; | |
2359 | * | |
2360 | * struct COMMIT3resfail { | |
2361 | * wcc_data file_wcc; | |
2362 | * }; | |
2363 | * | |
2364 | * union COMMIT3res switch (nfsstat3 status) { | |
2365 | * case NFS3_OK: | |
2366 | * COMMIT3resok resok; | |
2367 | * default: | |
2368 | * COMMIT3resfail resfail; | |
2369 | * }; | |
2370 | */ | |
bf269551 CL |
2371 | static int nfs3_xdr_dec_commit3res(struct rpc_rqst *req, |
2372 | struct xdr_stream *xdr, | |
fc016483 | 2373 | void *data) |
e4f93234 | 2374 | { |
fc016483 | 2375 | struct nfs_commitres *result = data; |
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; | |
bf269551 | 2382 | error = decode_wcc_data(xdr, result->fattr); |
e4f93234 CL |
2383 | if (unlikely(error)) |
2384 | goto out; | |
aabff4dd | 2385 | result->op_status = status; |
e4f93234 CL |
2386 | if (status != NFS3_OK) |
2387 | goto out_status; | |
2f2c63bc | 2388 | error = decode_writeverf3(xdr, &result->verf->verifier); |
e4f93234 CL |
2389 | out: |
2390 | return error; | |
2391 | out_status: | |
5e7e5a0d | 2392 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
2393 | } |
2394 | ||
b7fa0554 | 2395 | #ifdef CONFIG_NFS_V3_ACL |
b7fa0554 | 2396 | |
e4f93234 CL |
2397 | static inline int decode_getacl3resok(struct xdr_stream *xdr, |
2398 | struct nfs3_getaclres *result) | |
2399 | { | |
2400 | struct posix_acl **acl; | |
2401 | unsigned int *aclcnt; | |
2402 | size_t hdrlen; | |
2403 | int error; | |
2404 | ||
2405 | error = decode_post_op_attr(xdr, result->fattr); | |
2406 | if (unlikely(error)) | |
2407 | goto out; | |
2408 | error = decode_uint32(xdr, &result->mask); | |
2409 | if (unlikely(error)) | |
2410 | goto out; | |
2411 | error = -EINVAL; | |
2412 | if (result->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT)) | |
2413 | goto out; | |
2414 | ||
1aecca3e | 2415 | hdrlen = xdr_stream_pos(xdr); |
e4f93234 CL |
2416 | |
2417 | acl = NULL; | |
2418 | if (result->mask & NFS_ACL) | |
2419 | acl = &result->acl_access; | |
2420 | aclcnt = NULL; | |
2421 | if (result->mask & NFS_ACLCNT) | |
2422 | aclcnt = &result->acl_access_count; | |
2423 | error = nfsacl_decode(xdr->buf, hdrlen, aclcnt, acl); | |
2424 | if (unlikely(error <= 0)) | |
2425 | goto out; | |
2426 | ||
2427 | acl = NULL; | |
2428 | if (result->mask & NFS_DFACL) | |
2429 | acl = &result->acl_default; | |
2430 | aclcnt = NULL; | |
2431 | if (result->mask & NFS_DFACLCNT) | |
2432 | aclcnt = &result->acl_default_count; | |
2433 | error = nfsacl_decode(xdr->buf, hdrlen + error, aclcnt, acl); | |
2434 | if (unlikely(error <= 0)) | |
2435 | return error; | |
2436 | error = 0; | |
2437 | out: | |
2438 | return error; | |
2439 | } | |
2440 | ||
bf269551 CL |
2441 | static int nfs3_xdr_dec_getacl3res(struct rpc_rqst *req, |
2442 | struct xdr_stream *xdr, | |
fc016483 | 2443 | void *result) |
e4f93234 | 2444 | { |
e4f93234 CL |
2445 | enum nfs_stat status; |
2446 | int error; | |
2447 | ||
bf269551 | 2448 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
2449 | if (unlikely(error)) |
2450 | goto out; | |
2451 | if (status != NFS3_OK) | |
2452 | goto out_default; | |
bf269551 | 2453 | error = decode_getacl3resok(xdr, result); |
e4f93234 CL |
2454 | out: |
2455 | return error; | |
2456 | out_default: | |
5e7e5a0d | 2457 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
2458 | } |
2459 | ||
bf269551 CL |
2460 | static int nfs3_xdr_dec_setacl3res(struct rpc_rqst *req, |
2461 | struct xdr_stream *xdr, | |
fc016483 | 2462 | void *result) |
e4f93234 | 2463 | { |
e4f93234 CL |
2464 | enum nfs_stat status; |
2465 | int error; | |
2466 | ||
bf269551 | 2467 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
2468 | if (unlikely(error)) |
2469 | goto out; | |
2470 | if (status != NFS3_OK) | |
2471 | goto out_default; | |
bf269551 | 2472 | error = decode_post_op_attr(xdr, result); |
e4f93234 CL |
2473 | out: |
2474 | return error; | |
2475 | out_default: | |
5e7e5a0d | 2476 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
2477 | } |
2478 | ||
b7fa0554 AG |
2479 | #endif /* CONFIG_NFS_V3_ACL */ |
2480 | ||
5e7e5a0d BS |
2481 | |
2482 | /* | |
2483 | * We need to translate between nfs status return values and | |
2484 | * the local errno values which may not be the same. | |
2485 | */ | |
2486 | static const struct { | |
2487 | int stat; | |
2488 | int errno; | |
2489 | } nfs_errtbl[] = { | |
2490 | { NFS_OK, 0 }, | |
2491 | { NFSERR_PERM, -EPERM }, | |
2492 | { NFSERR_NOENT, -ENOENT }, | |
2493 | { NFSERR_IO, -errno_NFSERR_IO}, | |
2494 | { NFSERR_NXIO, -ENXIO }, | |
2495 | /* { NFSERR_EAGAIN, -EAGAIN }, */ | |
2496 | { NFSERR_ACCES, -EACCES }, | |
2497 | { NFSERR_EXIST, -EEXIST }, | |
2498 | { NFSERR_XDEV, -EXDEV }, | |
2499 | { NFSERR_NODEV, -ENODEV }, | |
2500 | { NFSERR_NOTDIR, -ENOTDIR }, | |
2501 | { NFSERR_ISDIR, -EISDIR }, | |
2502 | { NFSERR_INVAL, -EINVAL }, | |
2503 | { NFSERR_FBIG, -EFBIG }, | |
2504 | { NFSERR_NOSPC, -ENOSPC }, | |
2505 | { NFSERR_ROFS, -EROFS }, | |
2506 | { NFSERR_MLINK, -EMLINK }, | |
2507 | { NFSERR_NAMETOOLONG, -ENAMETOOLONG }, | |
2508 | { NFSERR_NOTEMPTY, -ENOTEMPTY }, | |
2509 | { NFSERR_DQUOT, -EDQUOT }, | |
2510 | { NFSERR_STALE, -ESTALE }, | |
2511 | { NFSERR_REMOTE, -EREMOTE }, | |
2512 | #ifdef EWFLUSH | |
2513 | { NFSERR_WFLUSH, -EWFLUSH }, | |
2514 | #endif | |
2515 | { NFSERR_BADHANDLE, -EBADHANDLE }, | |
2516 | { NFSERR_NOT_SYNC, -ENOTSYNC }, | |
2517 | { NFSERR_BAD_COOKIE, -EBADCOOKIE }, | |
2518 | { NFSERR_NOTSUPP, -ENOTSUPP }, | |
2519 | { NFSERR_TOOSMALL, -ETOOSMALL }, | |
2520 | { NFSERR_SERVERFAULT, -EREMOTEIO }, | |
2521 | { NFSERR_BADTYPE, -EBADTYPE }, | |
2522 | { NFSERR_JUKEBOX, -EJUKEBOX }, | |
2523 | { -1, -EIO } | |
2524 | }; | |
2525 | ||
2526 | /** | |
2527 | * nfs3_stat_to_errno - convert an NFS status code to a local errno | |
2528 | * @status: NFS status code to convert | |
2529 | * | |
2530 | * Returns a local errno value, or -EIO if the NFS status code is | |
2531 | * not recognized. This function is used jointly by NFSv2 and NFSv3. | |
2532 | */ | |
2533 | static int nfs3_stat_to_errno(enum nfs_stat status) | |
2534 | { | |
2535 | int i; | |
2536 | ||
2537 | for (i = 0; nfs_errtbl[i].stat != -1; i++) { | |
2538 | if (nfs_errtbl[i].stat == (int)status) | |
2539 | return nfs_errtbl[i].errno; | |
2540 | } | |
2541 | dprintk("NFS: Unrecognized nfs status value: %u\n", status); | |
2542 | return nfs_errtbl[i].errno; | |
2543 | } | |
2544 | ||
2545 | ||
1da177e4 LT |
2546 | #define PROC(proc, argtype, restype, timer) \ |
2547 | [NFS3PROC_##proc] = { \ | |
2548 | .p_proc = NFS3PROC_##proc, \ | |
fcc85819 | 2549 | .p_encode = nfs3_xdr_enc_##argtype##3args, \ |
fc016483 | 2550 | .p_decode = nfs3_xdr_dec_##restype##3res, \ |
ad96b5b5 | 2551 | .p_arglen = NFS3_##argtype##args_sz, \ |
f5fc3c50 | 2552 | .p_replen = NFS3_##restype##res_sz, \ |
cc0175c1 CL |
2553 | .p_timer = timer, \ |
2554 | .p_statidx = NFS3PROC_##proc, \ | |
2555 | .p_name = #proc, \ | |
1da177e4 LT |
2556 | } |
2557 | ||
511e936b | 2558 | const struct rpc_procinfo nfs3_procedures[] = { |
f5fc3c50 CL |
2559 | PROC(GETATTR, getattr, getattr, 1), |
2560 | PROC(SETATTR, setattr, setattr, 0), | |
2561 | PROC(LOOKUP, lookup, lookup, 2), | |
2562 | PROC(ACCESS, access, access, 1), | |
2563 | PROC(READLINK, readlink, readlink, 3), | |
2564 | PROC(READ, read, read, 3), | |
2565 | PROC(WRITE, write, write, 4), | |
2566 | PROC(CREATE, create, create, 0), | |
2567 | PROC(MKDIR, mkdir, create, 0), | |
2568 | PROC(SYMLINK, symlink, create, 0), | |
2569 | PROC(MKNOD, mknod, create, 0), | |
2570 | PROC(REMOVE, remove, remove, 0), | |
2571 | PROC(RMDIR, lookup, setattr, 0), | |
2572 | PROC(RENAME, rename, rename, 0), | |
2573 | PROC(LINK, link, link, 0), | |
2574 | PROC(READDIR, readdir, readdir, 3), | |
2575 | PROC(READDIRPLUS, readdirplus, readdir, 3), | |
2576 | PROC(FSSTAT, getattr, fsstat, 0), | |
2577 | PROC(FSINFO, getattr, fsinfo, 0), | |
2578 | PROC(PATHCONF, getattr, pathconf, 0), | |
2579 | PROC(COMMIT, commit, commit, 5), | |
1da177e4 LT |
2580 | }; |
2581 | ||
c551858a | 2582 | static unsigned int nfs_version3_counts[ARRAY_SIZE(nfs3_procedures)]; |
a613fa16 | 2583 | const struct rpc_version nfs_version3 = { |
1da177e4 | 2584 | .number = 3, |
e8c96f8c | 2585 | .nrprocs = ARRAY_SIZE(nfs3_procedures), |
c551858a CH |
2586 | .procs = nfs3_procedures, |
2587 | .counts = nfs_version3_counts, | |
1da177e4 LT |
2588 | }; |
2589 | ||
b7fa0554 | 2590 | #ifdef CONFIG_NFS_V3_ACL |
511e936b | 2591 | static const struct rpc_procinfo nfs3_acl_procedures[] = { |
b7fa0554 AG |
2592 | [ACLPROC3_GETACL] = { |
2593 | .p_proc = ACLPROC3_GETACL, | |
fcc85819 | 2594 | .p_encode = nfs3_xdr_enc_getacl3args, |
fc016483 | 2595 | .p_decode = nfs3_xdr_dec_getacl3res, |
2bea90d4 CL |
2596 | .p_arglen = ACL3_getaclargs_sz, |
2597 | .p_replen = ACL3_getaclres_sz, | |
b7fa0554 | 2598 | .p_timer = 1, |
cc0175c1 | 2599 | .p_name = "GETACL", |
b7fa0554 AG |
2600 | }, |
2601 | [ACLPROC3_SETACL] = { | |
2602 | .p_proc = ACLPROC3_SETACL, | |
fcc85819 | 2603 | .p_encode = nfs3_xdr_enc_setacl3args, |
fc016483 | 2604 | .p_decode = nfs3_xdr_dec_setacl3res, |
2bea90d4 CL |
2605 | .p_arglen = ACL3_setaclargs_sz, |
2606 | .p_replen = ACL3_setaclres_sz, | |
b7fa0554 | 2607 | .p_timer = 0, |
cc0175c1 | 2608 | .p_name = "SETACL", |
b7fa0554 AG |
2609 | }, |
2610 | }; | |
2611 | ||
c551858a | 2612 | static unsigned int nfs3_acl_counts[ARRAY_SIZE(nfs3_acl_procedures)]; |
a613fa16 | 2613 | const struct rpc_version nfsacl_version3 = { |
b7fa0554 | 2614 | .number = 3, |
9ae7d8ff | 2615 | .nrprocs = ARRAY_SIZE(nfs3_acl_procedures), |
b7fa0554 | 2616 | .procs = nfs3_acl_procedures, |
c551858a | 2617 | .counts = nfs3_acl_counts, |
b7fa0554 AG |
2618 | }; |
2619 | #endif /* CONFIG_NFS_V3_ACL */ |