Commit | Line | Data |
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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 | { | |
95582b00 | 564 | struct timespec ts; |
d9c407b1 CL |
565 | u32 nbytes; |
566 | __be32 *p; | |
567 | ||
568 | /* | |
569 | * In order to make only a single xdr_reserve_space() call, | |
570 | * pre-compute the total number of bytes to be reserved. | |
571 | * Six boolean values, one for each set_foo field, are always | |
572 | * present in the encoded result, so start there. | |
573 | */ | |
574 | nbytes = 6 * 4; | |
575 | if (attr->ia_valid & ATTR_MODE) | |
576 | nbytes += 4; | |
577 | if (attr->ia_valid & ATTR_UID) | |
578 | nbytes += 4; | |
579 | if (attr->ia_valid & ATTR_GID) | |
580 | nbytes += 4; | |
581 | if (attr->ia_valid & ATTR_SIZE) | |
582 | nbytes += 8; | |
583 | if (attr->ia_valid & ATTR_ATIME_SET) | |
584 | nbytes += 8; | |
585 | if (attr->ia_valid & ATTR_MTIME_SET) | |
586 | nbytes += 8; | |
587 | p = xdr_reserve_space(xdr, nbytes); | |
588 | ||
9d5a6434 CL |
589 | if (attr->ia_valid & ATTR_MODE) { |
590 | *p++ = xdr_one; | |
591 | *p++ = cpu_to_be32(attr->ia_mode & S_IALLUGO); | |
592 | } else | |
593 | *p++ = xdr_zero; | |
594 | ||
595 | if (attr->ia_valid & ATTR_UID) { | |
596 | *p++ = xdr_one; | |
57a38dae | 597 | *p++ = cpu_to_be32(from_kuid(&init_user_ns, attr->ia_uid)); |
9d5a6434 CL |
598 | } else |
599 | *p++ = xdr_zero; | |
600 | ||
601 | if (attr->ia_valid & ATTR_GID) { | |
602 | *p++ = xdr_one; | |
57a38dae | 603 | *p++ = cpu_to_be32(from_kgid(&init_user_ns, attr->ia_gid)); |
9d5a6434 CL |
604 | } else |
605 | *p++ = xdr_zero; | |
606 | ||
607 | if (attr->ia_valid & ATTR_SIZE) { | |
608 | *p++ = xdr_one; | |
609 | p = xdr_encode_hyper(p, (u64)attr->ia_size); | |
610 | } else | |
611 | *p++ = xdr_zero; | |
612 | ||
613 | if (attr->ia_valid & ATTR_ATIME_SET) { | |
95582b00 | 614 | struct timespec ts; |
9d5a6434 | 615 | *p++ = xdr_two; |
95582b00 DD |
616 | ts = timespec64_to_timespec(attr->ia_atime); |
617 | p = xdr_encode_nfstime3(p, &ts); | |
9d5a6434 CL |
618 | } else if (attr->ia_valid & ATTR_ATIME) { |
619 | *p++ = xdr_one; | |
620 | } else | |
621 | *p++ = xdr_zero; | |
622 | ||
623 | if (attr->ia_valid & ATTR_MTIME_SET) { | |
624 | *p++ = xdr_two; | |
95582b00 DD |
625 | ts = timespec64_to_timespec(attr->ia_mtime); |
626 | xdr_encode_nfstime3(p, &ts); | |
9d5a6434 CL |
627 | } else if (attr->ia_valid & ATTR_MTIME) { |
628 | *p = xdr_one; | |
629 | } else | |
630 | *p = xdr_zero; | |
d9c407b1 CL |
631 | } |
632 | ||
e4f93234 CL |
633 | /* |
634 | * fattr3 | |
635 | * | |
636 | * struct fattr3 { | |
637 | * ftype3 type; | |
638 | * mode3 mode; | |
639 | * uint32 nlink; | |
640 | * uid3 uid; | |
641 | * gid3 gid; | |
642 | * size3 size; | |
643 | * size3 used; | |
644 | * specdata3 rdev; | |
645 | * uint64 fsid; | |
646 | * fileid3 fileid; | |
647 | * nfstime3 atime; | |
648 | * nfstime3 mtime; | |
649 | * nfstime3 ctime; | |
650 | * }; | |
651 | */ | |
652 | static int decode_fattr3(struct xdr_stream *xdr, struct nfs_fattr *fattr) | |
653 | { | |
f6048709 | 654 | umode_t fmode; |
e4f93234 CL |
655 | __be32 *p; |
656 | ||
657 | p = xdr_inline_decode(xdr, NFS3_fattr_sz << 2); | |
658 | if (unlikely(p == NULL)) | |
659 | goto out_overflow; | |
f6048709 CL |
660 | |
661 | p = xdr_decode_ftype3(p, &fmode); | |
662 | ||
663 | fattr->mode = (be32_to_cpup(p++) & ~S_IFMT) | fmode; | |
664 | fattr->nlink = be32_to_cpup(p++); | |
57a38dae EB |
665 | fattr->uid = make_kuid(&init_user_ns, be32_to_cpup(p++)); |
666 | if (!uid_valid(fattr->uid)) | |
667 | goto out_uid; | |
668 | fattr->gid = make_kgid(&init_user_ns, be32_to_cpup(p++)); | |
669 | if (!gid_valid(fattr->gid)) | |
670 | goto out_gid; | |
f6048709 CL |
671 | |
672 | p = xdr_decode_size3(p, &fattr->size); | |
673 | p = xdr_decode_size3(p, &fattr->du.nfs3.used); | |
674 | p = xdr_decode_specdata3(p, &fattr->rdev); | |
675 | ||
676 | p = xdr_decode_hyper(p, &fattr->fsid.major); | |
677 | fattr->fsid.minor = 0; | |
678 | ||
679 | p = xdr_decode_fileid3(p, &fattr->fileid); | |
680 | p = xdr_decode_nfstime3(p, &fattr->atime); | |
681 | p = xdr_decode_nfstime3(p, &fattr->mtime); | |
682 | xdr_decode_nfstime3(p, &fattr->ctime); | |
3a1556e8 | 683 | fattr->change_attr = nfs_timespec_to_change_attr(&fattr->ctime); |
f6048709 CL |
684 | |
685 | fattr->valid |= NFS_ATTR_FATTR_V3; | |
e4f93234 | 686 | return 0; |
57a38dae EB |
687 | out_uid: |
688 | dprintk("NFS: returned invalid uid\n"); | |
689 | return -EINVAL; | |
690 | out_gid: | |
691 | dprintk("NFS: returned invalid gid\n"); | |
692 | return -EINVAL; | |
e4f93234 CL |
693 | out_overflow: |
694 | print_overflow_msg(__func__, xdr); | |
695 | return -EIO; | |
696 | } | |
697 | ||
698 | /* | |
699 | * post_op_attr | |
700 | * | |
701 | * union post_op_attr switch (bool attributes_follow) { | |
702 | * case TRUE: | |
703 | * fattr3 attributes; | |
704 | * case FALSE: | |
705 | * void; | |
706 | * }; | |
707 | */ | |
708 | static int decode_post_op_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr) | |
709 | { | |
710 | __be32 *p; | |
711 | ||
712 | p = xdr_inline_decode(xdr, 4); | |
713 | if (unlikely(p == NULL)) | |
714 | goto out_overflow; | |
715 | if (*p != xdr_zero) | |
716 | return decode_fattr3(xdr, fattr); | |
717 | return 0; | |
718 | out_overflow: | |
719 | print_overflow_msg(__func__, xdr); | |
720 | return -EIO; | |
721 | } | |
722 | ||
723 | /* | |
724 | * wcc_attr | |
725 | * struct wcc_attr { | |
726 | * size3 size; | |
727 | * nfstime3 mtime; | |
728 | * nfstime3 ctime; | |
729 | * }; | |
730 | */ | |
731 | static int decode_wcc_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr) | |
732 | { | |
733 | __be32 *p; | |
734 | ||
735 | p = xdr_inline_decode(xdr, NFS3_wcc_attr_sz << 2); | |
736 | if (unlikely(p == NULL)) | |
737 | goto out_overflow; | |
f6048709 CL |
738 | |
739 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE | |
3a1556e8 | 740 | | NFS_ATTR_FATTR_PRECHANGE |
f6048709 CL |
741 | | NFS_ATTR_FATTR_PREMTIME |
742 | | NFS_ATTR_FATTR_PRECTIME; | |
743 | ||
744 | p = xdr_decode_size3(p, &fattr->pre_size); | |
745 | p = xdr_decode_nfstime3(p, &fattr->pre_mtime); | |
746 | xdr_decode_nfstime3(p, &fattr->pre_ctime); | |
3a1556e8 | 747 | fattr->pre_change_attr = nfs_timespec_to_change_attr(&fattr->pre_ctime); |
f6048709 | 748 | |
e4f93234 CL |
749 | return 0; |
750 | out_overflow: | |
751 | print_overflow_msg(__func__, xdr); | |
752 | return -EIO; | |
753 | } | |
754 | ||
755 | /* | |
756 | * pre_op_attr | |
757 | * union pre_op_attr switch (bool attributes_follow) { | |
758 | * case TRUE: | |
759 | * wcc_attr attributes; | |
760 | * case FALSE: | |
761 | * void; | |
762 | * }; | |
763 | * | |
764 | * wcc_data | |
765 | * | |
766 | * struct wcc_data { | |
767 | * pre_op_attr before; | |
768 | * post_op_attr after; | |
769 | * }; | |
770 | */ | |
771 | static int decode_pre_op_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr) | |
772 | { | |
773 | __be32 *p; | |
774 | ||
775 | p = xdr_inline_decode(xdr, 4); | |
776 | if (unlikely(p == NULL)) | |
777 | goto out_overflow; | |
778 | if (*p != xdr_zero) | |
779 | return decode_wcc_attr(xdr, fattr); | |
780 | return 0; | |
781 | out_overflow: | |
782 | print_overflow_msg(__func__, xdr); | |
783 | return -EIO; | |
784 | } | |
785 | ||
786 | static int decode_wcc_data(struct xdr_stream *xdr, struct nfs_fattr *fattr) | |
787 | { | |
788 | int error; | |
789 | ||
790 | error = decode_pre_op_attr(xdr, fattr); | |
791 | if (unlikely(error)) | |
792 | goto out; | |
793 | error = decode_post_op_attr(xdr, fattr); | |
794 | out: | |
795 | return error; | |
796 | } | |
797 | ||
798 | /* | |
799 | * post_op_fh3 | |
800 | * | |
801 | * union post_op_fh3 switch (bool handle_follows) { | |
802 | * case TRUE: | |
803 | * nfs_fh3 handle; | |
804 | * case FALSE: | |
805 | * void; | |
806 | * }; | |
807 | */ | |
808 | static int decode_post_op_fh3(struct xdr_stream *xdr, struct nfs_fh *fh) | |
809 | { | |
810 | __be32 *p = xdr_inline_decode(xdr, 4); | |
811 | if (unlikely(p == NULL)) | |
812 | goto out_overflow; | |
813 | if (*p != xdr_zero) | |
814 | return decode_nfs_fh3(xdr, fh); | |
815 | zero_nfs_fh3(fh); | |
816 | return 0; | |
817 | out_overflow: | |
818 | print_overflow_msg(__func__, xdr); | |
819 | return -EIO; | |
820 | } | |
821 | ||
d9c407b1 CL |
822 | /* |
823 | * diropargs3 | |
824 | * | |
825 | * struct diropargs3 { | |
826 | * nfs_fh3 dir; | |
827 | * filename3 name; | |
828 | * }; | |
829 | */ | |
830 | static void encode_diropargs3(struct xdr_stream *xdr, const struct nfs_fh *fh, | |
831 | const char *name, u32 length) | |
832 | { | |
833 | encode_nfs_fh3(xdr, fh); | |
834 | encode_filename3(xdr, name, length); | |
835 | } | |
836 | ||
837 | ||
1da177e4 | 838 | /* |
499ff710 CL |
839 | * NFSv3 XDR encode functions |
840 | * | |
841 | * NFSv3 argument types are defined in section 3.3 of RFC 1813: | |
842 | * "NFS Version 3 Protocol Specification". | |
1da177e4 LT |
843 | */ |
844 | ||
d9c407b1 CL |
845 | /* |
846 | * 3.3.1 GETATTR3args | |
847 | * | |
848 | * struct GETATTR3args { | |
849 | * nfs_fh3 object; | |
850 | * }; | |
851 | */ | |
9f06c719 CL |
852 | static void nfs3_xdr_enc_getattr3args(struct rpc_rqst *req, |
853 | struct xdr_stream *xdr, | |
fcc85819 | 854 | const void *data) |
d9c407b1 | 855 | { |
fcc85819 CH |
856 | const struct nfs_fh *fh = data; |
857 | ||
9f06c719 | 858 | encode_nfs_fh3(xdr, fh); |
d9c407b1 CL |
859 | } |
860 | ||
d9c407b1 CL |
861 | /* |
862 | * 3.3.2 SETATTR3args | |
863 | * | |
864 | * union sattrguard3 switch (bool check) { | |
865 | * case TRUE: | |
866 | * nfstime3 obj_ctime; | |
867 | * case FALSE: | |
868 | * void; | |
869 | * }; | |
870 | * | |
871 | * struct SETATTR3args { | |
872 | * nfs_fh3 object; | |
873 | * sattr3 new_attributes; | |
874 | * sattrguard3 guard; | |
875 | * }; | |
876 | */ | |
877 | static void encode_sattrguard3(struct xdr_stream *xdr, | |
878 | const struct nfs3_sattrargs *args) | |
879 | { | |
880 | __be32 *p; | |
881 | ||
882 | if (args->guard) { | |
883 | p = xdr_reserve_space(xdr, 4 + 8); | |
884 | *p++ = xdr_one; | |
9d5a6434 | 885 | xdr_encode_nfstime3(p, &args->guardtime); |
d9c407b1 CL |
886 | } else { |
887 | p = xdr_reserve_space(xdr, 4); | |
888 | *p = xdr_zero; | |
889 | } | |
890 | } | |
891 | ||
9f06c719 CL |
892 | static void nfs3_xdr_enc_setattr3args(struct rpc_rqst *req, |
893 | struct xdr_stream *xdr, | |
fcc85819 | 894 | const void *data) |
d9c407b1 | 895 | { |
fcc85819 | 896 | const struct nfs3_sattrargs *args = data; |
9f06c719 CL |
897 | encode_nfs_fh3(xdr, args->fh); |
898 | encode_sattr3(xdr, args->sattr); | |
899 | encode_sattrguard3(xdr, args); | |
d9c407b1 CL |
900 | } |
901 | ||
d9c407b1 CL |
902 | /* |
903 | * 3.3.3 LOOKUP3args | |
904 | * | |
905 | * struct LOOKUP3args { | |
906 | * diropargs3 what; | |
907 | * }; | |
908 | */ | |
9f06c719 CL |
909 | static void nfs3_xdr_enc_lookup3args(struct rpc_rqst *req, |
910 | struct xdr_stream *xdr, | |
fcc85819 | 911 | const void *data) |
d9c407b1 | 912 | { |
fcc85819 CH |
913 | const struct nfs3_diropargs *args = data; |
914 | ||
9f06c719 | 915 | encode_diropargs3(xdr, args->fh, args->name, args->len); |
d9c407b1 CL |
916 | } |
917 | ||
d9c407b1 CL |
918 | /* |
919 | * 3.3.4 ACCESS3args | |
920 | * | |
921 | * struct ACCESS3args { | |
922 | * nfs_fh3 object; | |
923 | * uint32 access; | |
924 | * }; | |
925 | */ | |
926 | static void encode_access3args(struct xdr_stream *xdr, | |
927 | const struct nfs3_accessargs *args) | |
928 | { | |
929 | encode_nfs_fh3(xdr, args->fh); | |
930 | encode_uint32(xdr, args->access); | |
931 | } | |
932 | ||
9f06c719 CL |
933 | static void nfs3_xdr_enc_access3args(struct rpc_rqst *req, |
934 | struct xdr_stream *xdr, | |
fcc85819 | 935 | const void *data) |
d9c407b1 | 936 | { |
fcc85819 CH |
937 | const struct nfs3_accessargs *args = data; |
938 | ||
9f06c719 | 939 | encode_access3args(xdr, args); |
d9c407b1 CL |
940 | } |
941 | ||
942 | /* | |
943 | * 3.3.5 READLINK3args | |
944 | * | |
945 | * struct READLINK3args { | |
946 | * nfs_fh3 symlink; | |
947 | * }; | |
948 | */ | |
9f06c719 CL |
949 | static void nfs3_xdr_enc_readlink3args(struct rpc_rqst *req, |
950 | struct xdr_stream *xdr, | |
fcc85819 | 951 | const void *data) |
d9c407b1 | 952 | { |
fcc85819 CH |
953 | const struct nfs3_readlinkargs *args = data; |
954 | ||
9f06c719 | 955 | encode_nfs_fh3(xdr, args->fh); |
d9c407b1 CL |
956 | prepare_reply_buffer(req, args->pages, args->pgbase, |
957 | args->pglen, NFS3_readlinkres_sz); | |
d9c407b1 CL |
958 | } |
959 | ||
d9c407b1 CL |
960 | /* |
961 | * 3.3.6 READ3args | |
962 | * | |
963 | * struct READ3args { | |
964 | * nfs_fh3 file; | |
965 | * offset3 offset; | |
966 | * count3 count; | |
967 | * }; | |
968 | */ | |
969 | static void encode_read3args(struct xdr_stream *xdr, | |
3c6b899c | 970 | const struct nfs_pgio_args *args) |
d9c407b1 CL |
971 | { |
972 | __be32 *p; | |
973 | ||
974 | encode_nfs_fh3(xdr, args->fh); | |
975 | ||
976 | p = xdr_reserve_space(xdr, 8 + 4); | |
977 | p = xdr_encode_hyper(p, args->offset); | |
978 | *p = cpu_to_be32(args->count); | |
979 | } | |
980 | ||
9f06c719 CL |
981 | static void nfs3_xdr_enc_read3args(struct rpc_rqst *req, |
982 | struct xdr_stream *xdr, | |
fcc85819 | 983 | const void *data) |
d9c407b1 | 984 | { |
fcc85819 CH |
985 | const struct nfs_pgio_args *args = data; |
986 | ||
9f06c719 | 987 | encode_read3args(xdr, args); |
d9c407b1 CL |
988 | prepare_reply_buffer(req, args->pages, args->pgbase, |
989 | args->count, NFS3_readres_sz); | |
990 | req->rq_rcv_buf.flags |= XDRBUF_READ; | |
d9c407b1 CL |
991 | } |
992 | ||
d9c407b1 CL |
993 | /* |
994 | * 3.3.7 WRITE3args | |
995 | * | |
996 | * enum stable_how { | |
997 | * UNSTABLE = 0, | |
998 | * DATA_SYNC = 1, | |
999 | * FILE_SYNC = 2 | |
1000 | * }; | |
1001 | * | |
1002 | * struct WRITE3args { | |
1003 | * nfs_fh3 file; | |
1004 | * offset3 offset; | |
1005 | * count3 count; | |
1006 | * stable_how stable; | |
1007 | * opaque data<>; | |
1008 | * }; | |
1009 | */ | |
1010 | static void encode_write3args(struct xdr_stream *xdr, | |
3c6b899c | 1011 | const struct nfs_pgio_args *args) |
d9c407b1 CL |
1012 | { |
1013 | __be32 *p; | |
1014 | ||
1015 | encode_nfs_fh3(xdr, args->fh); | |
1016 | ||
1017 | p = xdr_reserve_space(xdr, 8 + 4 + 4 + 4); | |
1018 | p = xdr_encode_hyper(p, args->offset); | |
1019 | *p++ = cpu_to_be32(args->count); | |
d9c407b1 | 1020 | *p++ = cpu_to_be32(args->stable); |
d9c407b1 CL |
1021 | *p = cpu_to_be32(args->count); |
1022 | xdr_write_pages(xdr, args->pages, args->pgbase, args->count); | |
1023 | } | |
1024 | ||
9f06c719 CL |
1025 | static void nfs3_xdr_enc_write3args(struct rpc_rqst *req, |
1026 | struct xdr_stream *xdr, | |
fcc85819 | 1027 | const void *data) |
d9c407b1 | 1028 | { |
fcc85819 CH |
1029 | const struct nfs_pgio_args *args = data; |
1030 | ||
9f06c719 CL |
1031 | encode_write3args(xdr, args); |
1032 | xdr->buf->flags |= XDRBUF_WRITE; | |
d9c407b1 CL |
1033 | } |
1034 | ||
d9c407b1 CL |
1035 | /* |
1036 | * 3.3.8 CREATE3args | |
1037 | * | |
1038 | * enum createmode3 { | |
1039 | * UNCHECKED = 0, | |
1040 | * GUARDED = 1, | |
1041 | * EXCLUSIVE = 2 | |
1042 | * }; | |
1043 | * | |
1044 | * union createhow3 switch (createmode3 mode) { | |
1045 | * case UNCHECKED: | |
1046 | * case GUARDED: | |
1047 | * sattr3 obj_attributes; | |
1048 | * case EXCLUSIVE: | |
1049 | * createverf3 verf; | |
1050 | * }; | |
1051 | * | |
1052 | * struct CREATE3args { | |
1053 | * diropargs3 where; | |
1054 | * createhow3 how; | |
1055 | * }; | |
1056 | */ | |
1057 | static void encode_createhow3(struct xdr_stream *xdr, | |
1058 | const struct nfs3_createargs *args) | |
1059 | { | |
1060 | encode_uint32(xdr, args->createmode); | |
1061 | switch (args->createmode) { | |
1062 | case NFS3_CREATE_UNCHECKED: | |
1063 | case NFS3_CREATE_GUARDED: | |
1064 | encode_sattr3(xdr, args->sattr); | |
1065 | break; | |
1066 | case NFS3_CREATE_EXCLUSIVE: | |
1067 | encode_createverf3(xdr, args->verifier); | |
1068 | break; | |
1069 | default: | |
1070 | BUG(); | |
1071 | } | |
1072 | } | |
1073 | ||
9f06c719 CL |
1074 | static void nfs3_xdr_enc_create3args(struct rpc_rqst *req, |
1075 | struct xdr_stream *xdr, | |
fcc85819 | 1076 | const void *data) |
d9c407b1 | 1077 | { |
fcc85819 CH |
1078 | const struct nfs3_createargs *args = data; |
1079 | ||
9f06c719 CL |
1080 | encode_diropargs3(xdr, args->fh, args->name, args->len); |
1081 | encode_createhow3(xdr, args); | |
d9c407b1 CL |
1082 | } |
1083 | ||
d9c407b1 CL |
1084 | /* |
1085 | * 3.3.9 MKDIR3args | |
1086 | * | |
1087 | * struct MKDIR3args { | |
1088 | * diropargs3 where; | |
1089 | * sattr3 attributes; | |
1090 | * }; | |
1091 | */ | |
9f06c719 CL |
1092 | static void nfs3_xdr_enc_mkdir3args(struct rpc_rqst *req, |
1093 | struct xdr_stream *xdr, | |
fcc85819 | 1094 | const void *data) |
d9c407b1 | 1095 | { |
fcc85819 CH |
1096 | const struct nfs3_mkdirargs *args = data; |
1097 | ||
9f06c719 CL |
1098 | encode_diropargs3(xdr, args->fh, args->name, args->len); |
1099 | encode_sattr3(xdr, args->sattr); | |
d9c407b1 CL |
1100 | } |
1101 | ||
d9c407b1 CL |
1102 | /* |
1103 | * 3.3.10 SYMLINK3args | |
1104 | * | |
1105 | * struct symlinkdata3 { | |
1106 | * sattr3 symlink_attributes; | |
1107 | * nfspath3 symlink_data; | |
1108 | * }; | |
1109 | * | |
1110 | * struct SYMLINK3args { | |
1111 | * diropargs3 where; | |
1112 | * symlinkdata3 symlink; | |
1113 | * }; | |
1114 | */ | |
1115 | static void encode_symlinkdata3(struct xdr_stream *xdr, | |
fcc85819 | 1116 | const void *data) |
d9c407b1 | 1117 | { |
fcc85819 CH |
1118 | const struct nfs3_symlinkargs *args = data; |
1119 | ||
d9c407b1 CL |
1120 | encode_sattr3(xdr, args->sattr); |
1121 | encode_nfspath3(xdr, args->pages, args->pathlen); | |
1122 | } | |
1123 | ||
9f06c719 CL |
1124 | static void nfs3_xdr_enc_symlink3args(struct rpc_rqst *req, |
1125 | struct xdr_stream *xdr, | |
fcc85819 | 1126 | const void *data) |
d9c407b1 | 1127 | { |
fcc85819 CH |
1128 | const struct nfs3_symlinkargs *args = data; |
1129 | ||
9f06c719 CL |
1130 | encode_diropargs3(xdr, args->fromfh, args->fromname, args->fromlen); |
1131 | encode_symlinkdata3(xdr, args); | |
2fcc213a | 1132 | xdr->buf->flags |= XDRBUF_WRITE; |
d9c407b1 CL |
1133 | } |
1134 | ||
d9c407b1 CL |
1135 | /* |
1136 | * 3.3.11 MKNOD3args | |
1137 | * | |
1138 | * struct devicedata3 { | |
1139 | * sattr3 dev_attributes; | |
1140 | * specdata3 spec; | |
1141 | * }; | |
1142 | * | |
1143 | * union mknoddata3 switch (ftype3 type) { | |
1144 | * case NF3CHR: | |
1145 | * case NF3BLK: | |
1146 | * devicedata3 device; | |
1147 | * case NF3SOCK: | |
1148 | * case NF3FIFO: | |
1149 | * sattr3 pipe_attributes; | |
1150 | * default: | |
1151 | * void; | |
1152 | * }; | |
1153 | * | |
1154 | * struct MKNOD3args { | |
1155 | * diropargs3 where; | |
1156 | * mknoddata3 what; | |
1157 | * }; | |
1158 | */ | |
1159 | static void encode_devicedata3(struct xdr_stream *xdr, | |
1160 | const struct nfs3_mknodargs *args) | |
1161 | { | |
1162 | encode_sattr3(xdr, args->sattr); | |
1163 | encode_specdata3(xdr, args->rdev); | |
1164 | } | |
1165 | ||
1166 | static void encode_mknoddata3(struct xdr_stream *xdr, | |
1167 | const struct nfs3_mknodargs *args) | |
1168 | { | |
1169 | encode_ftype3(xdr, args->type); | |
1170 | switch (args->type) { | |
1171 | case NF3CHR: | |
1172 | case NF3BLK: | |
1173 | encode_devicedata3(xdr, args); | |
1174 | break; | |
1175 | case NF3SOCK: | |
1176 | case NF3FIFO: | |
1177 | encode_sattr3(xdr, args->sattr); | |
1178 | break; | |
1179 | case NF3REG: | |
1180 | case NF3DIR: | |
1181 | break; | |
1182 | default: | |
1183 | BUG(); | |
1184 | } | |
1185 | } | |
1186 | ||
9f06c719 CL |
1187 | static void nfs3_xdr_enc_mknod3args(struct rpc_rqst *req, |
1188 | struct xdr_stream *xdr, | |
fcc85819 | 1189 | const void *data) |
d9c407b1 | 1190 | { |
fcc85819 CH |
1191 | const struct nfs3_mknodargs *args = data; |
1192 | ||
9f06c719 CL |
1193 | encode_diropargs3(xdr, args->fh, args->name, args->len); |
1194 | encode_mknoddata3(xdr, args); | |
d9c407b1 CL |
1195 | } |
1196 | ||
1197 | /* | |
1198 | * 3.3.12 REMOVE3args | |
1199 | * | |
1200 | * struct REMOVE3args { | |
1201 | * diropargs3 object; | |
1202 | * }; | |
1203 | */ | |
9f06c719 CL |
1204 | static void nfs3_xdr_enc_remove3args(struct rpc_rqst *req, |
1205 | struct xdr_stream *xdr, | |
fcc85819 | 1206 | const void *data) |
d9c407b1 | 1207 | { |
fcc85819 CH |
1208 | const struct nfs_removeargs *args = data; |
1209 | ||
9f06c719 | 1210 | encode_diropargs3(xdr, args->fh, args->name.name, args->name.len); |
d9c407b1 CL |
1211 | } |
1212 | ||
d9c407b1 CL |
1213 | /* |
1214 | * 3.3.14 RENAME3args | |
1215 | * | |
1216 | * struct RENAME3args { | |
1217 | * diropargs3 from; | |
1218 | * diropargs3 to; | |
1219 | * }; | |
1220 | */ | |
9f06c719 CL |
1221 | static void nfs3_xdr_enc_rename3args(struct rpc_rqst *req, |
1222 | struct xdr_stream *xdr, | |
fcc85819 | 1223 | const void *data) |
d9c407b1 | 1224 | { |
fcc85819 | 1225 | const struct nfs_renameargs *args = data; |
d9c407b1 CL |
1226 | const struct qstr *old = args->old_name; |
1227 | const struct qstr *new = args->new_name; | |
d9c407b1 | 1228 | |
9f06c719 CL |
1229 | encode_diropargs3(xdr, args->old_dir, old->name, old->len); |
1230 | encode_diropargs3(xdr, args->new_dir, new->name, new->len); | |
d9c407b1 CL |
1231 | } |
1232 | ||
d9c407b1 CL |
1233 | /* |
1234 | * 3.3.15 LINK3args | |
1235 | * | |
1236 | * struct LINK3args { | |
1237 | * nfs_fh3 file; | |
1238 | * diropargs3 link; | |
1239 | * }; | |
1240 | */ | |
9f06c719 CL |
1241 | static void nfs3_xdr_enc_link3args(struct rpc_rqst *req, |
1242 | struct xdr_stream *xdr, | |
fcc85819 | 1243 | const void *data) |
d9c407b1 | 1244 | { |
fcc85819 CH |
1245 | const struct nfs3_linkargs *args = data; |
1246 | ||
9f06c719 CL |
1247 | encode_nfs_fh3(xdr, args->fromfh); |
1248 | encode_diropargs3(xdr, args->tofh, args->toname, args->tolen); | |
d9c407b1 CL |
1249 | } |
1250 | ||
d9c407b1 CL |
1251 | /* |
1252 | * 3.3.16 READDIR3args | |
1253 | * | |
1254 | * struct READDIR3args { | |
1255 | * nfs_fh3 dir; | |
1256 | * cookie3 cookie; | |
1257 | * cookieverf3 cookieverf; | |
1258 | * count3 count; | |
1259 | * }; | |
1260 | */ | |
1261 | static void encode_readdir3args(struct xdr_stream *xdr, | |
1262 | const struct nfs3_readdirargs *args) | |
1263 | { | |
1264 | __be32 *p; | |
1265 | ||
1266 | encode_nfs_fh3(xdr, args->fh); | |
1267 | ||
1268 | p = xdr_reserve_space(xdr, 8 + NFS3_COOKIEVERFSIZE + 4); | |
1269 | p = xdr_encode_cookie3(p, args->cookie); | |
1270 | p = xdr_encode_cookieverf3(p, args->verf); | |
1271 | *p = cpu_to_be32(args->count); | |
1272 | } | |
1273 | ||
9f06c719 CL |
1274 | static void nfs3_xdr_enc_readdir3args(struct rpc_rqst *req, |
1275 | struct xdr_stream *xdr, | |
fcc85819 | 1276 | const void *data) |
d9c407b1 | 1277 | { |
fcc85819 CH |
1278 | const struct nfs3_readdirargs *args = data; |
1279 | ||
9f06c719 | 1280 | encode_readdir3args(xdr, args); |
d9c407b1 CL |
1281 | prepare_reply_buffer(req, args->pages, 0, |
1282 | args->count, NFS3_readdirres_sz); | |
d9c407b1 CL |
1283 | } |
1284 | ||
1285 | /* | |
1286 | * 3.3.17 READDIRPLUS3args | |
1287 | * | |
1288 | * struct READDIRPLUS3args { | |
1289 | * nfs_fh3 dir; | |
1290 | * cookie3 cookie; | |
1291 | * cookieverf3 cookieverf; | |
1292 | * count3 dircount; | |
1293 | * count3 maxcount; | |
1294 | * }; | |
1295 | */ | |
1296 | static void encode_readdirplus3args(struct xdr_stream *xdr, | |
1297 | const struct nfs3_readdirargs *args) | |
1298 | { | |
1299 | __be32 *p; | |
1300 | ||
1301 | encode_nfs_fh3(xdr, args->fh); | |
1302 | ||
1303 | p = xdr_reserve_space(xdr, 8 + NFS3_COOKIEVERFSIZE + 4 + 4); | |
1304 | p = xdr_encode_cookie3(p, args->cookie); | |
1305 | p = xdr_encode_cookieverf3(p, args->verf); | |
1306 | ||
1307 | /* | |
1308 | * readdirplus: need dircount + buffer size. | |
1309 | * We just make sure we make dircount big enough | |
1310 | */ | |
1311 | *p++ = cpu_to_be32(args->count >> 3); | |
1312 | ||
1313 | *p = cpu_to_be32(args->count); | |
1314 | } | |
1315 | ||
9f06c719 CL |
1316 | static void nfs3_xdr_enc_readdirplus3args(struct rpc_rqst *req, |
1317 | struct xdr_stream *xdr, | |
fcc85819 | 1318 | const void *data) |
d9c407b1 | 1319 | { |
fcc85819 CH |
1320 | const struct nfs3_readdirargs *args = data; |
1321 | ||
9f06c719 | 1322 | encode_readdirplus3args(xdr, args); |
d9c407b1 CL |
1323 | prepare_reply_buffer(req, args->pages, 0, |
1324 | args->count, NFS3_readdirres_sz); | |
d9c407b1 CL |
1325 | } |
1326 | ||
d9c407b1 CL |
1327 | /* |
1328 | * 3.3.21 COMMIT3args | |
1329 | * | |
1330 | * struct COMMIT3args { | |
1331 | * nfs_fh3 file; | |
1332 | * offset3 offset; | |
1333 | * count3 count; | |
1334 | * }; | |
1335 | */ | |
1336 | static void encode_commit3args(struct xdr_stream *xdr, | |
0b7c0153 | 1337 | const struct nfs_commitargs *args) |
d9c407b1 CL |
1338 | { |
1339 | __be32 *p; | |
1340 | ||
1341 | encode_nfs_fh3(xdr, args->fh); | |
1342 | ||
1343 | p = xdr_reserve_space(xdr, 8 + 4); | |
1344 | p = xdr_encode_hyper(p, args->offset); | |
1345 | *p = cpu_to_be32(args->count); | |
1346 | } | |
1347 | ||
9f06c719 CL |
1348 | static void nfs3_xdr_enc_commit3args(struct rpc_rqst *req, |
1349 | struct xdr_stream *xdr, | |
fcc85819 | 1350 | const void *data) |
d9c407b1 | 1351 | { |
fcc85819 CH |
1352 | const struct nfs_commitargs *args = data; |
1353 | ||
9f06c719 | 1354 | encode_commit3args(xdr, args); |
d9c407b1 CL |
1355 | } |
1356 | ||
b7fa0554 | 1357 | #ifdef CONFIG_NFS_V3_ACL |
b7fa0554 | 1358 | |
9f06c719 CL |
1359 | static void nfs3_xdr_enc_getacl3args(struct rpc_rqst *req, |
1360 | struct xdr_stream *xdr, | |
fcc85819 | 1361 | const void *data) |
d9c407b1 | 1362 | { |
fcc85819 CH |
1363 | const struct nfs3_getaclargs *args = data; |
1364 | ||
9f06c719 CL |
1365 | encode_nfs_fh3(xdr, args->fh); |
1366 | encode_uint32(xdr, args->mask); | |
d9c407b1 CL |
1367 | if (args->mask & (NFS_ACL | NFS_DFACL)) |
1368 | prepare_reply_buffer(req, args->pages, 0, | |
1369 | NFSACL_MAXPAGES << PAGE_SHIFT, | |
1370 | ACL3_getaclres_sz); | |
d9c407b1 CL |
1371 | } |
1372 | ||
9f06c719 CL |
1373 | static void nfs3_xdr_enc_setacl3args(struct rpc_rqst *req, |
1374 | struct xdr_stream *xdr, | |
fcc85819 | 1375 | const void *data) |
d9c407b1 | 1376 | { |
fcc85819 | 1377 | const struct nfs3_setaclargs *args = data; |
d9c407b1 CL |
1378 | unsigned int base; |
1379 | int error; | |
1380 | ||
9f06c719 CL |
1381 | encode_nfs_fh3(xdr, NFS_FH(args->inode)); |
1382 | encode_uint32(xdr, args->mask); | |
ee5dc773 CL |
1383 | |
1384 | base = req->rq_slen; | |
d9c407b1 | 1385 | if (args->npages != 0) |
9f06c719 | 1386 | xdr_write_pages(xdr, args->pages, 0, args->len); |
ee5dc773 | 1387 | else |
d683cc49 | 1388 | xdr_reserve_space(xdr, args->len); |
d9c407b1 | 1389 | |
9f06c719 | 1390 | error = nfsacl_encode(xdr->buf, base, args->inode, |
d9c407b1 CL |
1391 | (args->mask & NFS_ACL) ? |
1392 | args->acl_access : NULL, 1, 0); | |
7fc38846 | 1393 | /* FIXME: this is just broken */ |
d9c407b1 | 1394 | BUG_ON(error < 0); |
9f06c719 | 1395 | error = nfsacl_encode(xdr->buf, base + error, args->inode, |
d9c407b1 CL |
1396 | (args->mask & NFS_DFACL) ? |
1397 | args->acl_default : NULL, 1, | |
1398 | NFS_ACL_DEFAULT); | |
1399 | BUG_ON(error < 0); | |
d9c407b1 CL |
1400 | } |
1401 | ||
b7fa0554 AG |
1402 | #endif /* CONFIG_NFS_V3_ACL */ |
1403 | ||
1da177e4 | 1404 | /* |
b2cdd9c9 CL |
1405 | * NFSv3 XDR decode functions |
1406 | * | |
1407 | * NFSv3 result types are defined in section 3.3 of RFC 1813: | |
1408 | * "NFS Version 3 Protocol Specification". | |
1da177e4 | 1409 | */ |
1da177e4 LT |
1410 | |
1411 | /* | |
e4f93234 CL |
1412 | * 3.3.1 GETATTR3res |
1413 | * | |
1414 | * struct GETATTR3resok { | |
1415 | * fattr3 obj_attributes; | |
1416 | * }; | |
1417 | * | |
1418 | * union GETATTR3res switch (nfsstat3 status) { | |
1419 | * case NFS3_OK: | |
1420 | * GETATTR3resok resok; | |
1421 | * default: | |
1422 | * void; | |
1423 | * }; | |
1da177e4 | 1424 | */ |
bf269551 CL |
1425 | static int nfs3_xdr_dec_getattr3res(struct rpc_rqst *req, |
1426 | struct xdr_stream *xdr, | |
fc016483 | 1427 | void *result) |
1da177e4 | 1428 | { |
e4f93234 CL |
1429 | enum nfs_stat status; |
1430 | int error; | |
1431 | ||
bf269551 | 1432 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1433 | if (unlikely(error)) |
1434 | goto out; | |
1435 | if (status != NFS3_OK) | |
1436 | goto out_default; | |
bf269551 | 1437 | error = decode_fattr3(xdr, result); |
e4f93234 CL |
1438 | out: |
1439 | return error; | |
1440 | out_default: | |
5e7e5a0d | 1441 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1442 | } |
1443 | ||
e4f93234 CL |
1444 | /* |
1445 | * 3.3.2 SETATTR3res | |
1446 | * | |
1447 | * struct SETATTR3resok { | |
1448 | * wcc_data obj_wcc; | |
1449 | * }; | |
1450 | * | |
1451 | * struct SETATTR3resfail { | |
1452 | * wcc_data obj_wcc; | |
1453 | * }; | |
1454 | * | |
1455 | * union SETATTR3res switch (nfsstat3 status) { | |
1456 | * case NFS3_OK: | |
1457 | * SETATTR3resok resok; | |
1458 | * default: | |
1459 | * SETATTR3resfail resfail; | |
1460 | * }; | |
1461 | */ | |
bf269551 CL |
1462 | static int nfs3_xdr_dec_setattr3res(struct rpc_rqst *req, |
1463 | struct xdr_stream *xdr, | |
fc016483 | 1464 | void *result) |
e4f93234 | 1465 | { |
e4f93234 CL |
1466 | enum nfs_stat status; |
1467 | int error; | |
1468 | ||
bf269551 | 1469 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1470 | if (unlikely(error)) |
1471 | goto out; | |
bf269551 | 1472 | error = decode_wcc_data(xdr, result); |
e4f93234 CL |
1473 | if (unlikely(error)) |
1474 | goto out; | |
1475 | if (status != NFS3_OK) | |
1476 | goto out_status; | |
1477 | out: | |
1478 | return error; | |
1479 | out_status: | |
5e7e5a0d | 1480 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1481 | } |
1482 | ||
e4f93234 CL |
1483 | /* |
1484 | * 3.3.3 LOOKUP3res | |
1485 | * | |
1486 | * struct LOOKUP3resok { | |
1487 | * nfs_fh3 object; | |
1488 | * post_op_attr obj_attributes; | |
1489 | * post_op_attr dir_attributes; | |
1490 | * }; | |
1491 | * | |
1492 | * struct LOOKUP3resfail { | |
1493 | * post_op_attr dir_attributes; | |
1494 | * }; | |
1495 | * | |
1496 | * union LOOKUP3res switch (nfsstat3 status) { | |
1497 | * case NFS3_OK: | |
1498 | * LOOKUP3resok resok; | |
1499 | * default: | |
1500 | * LOOKUP3resfail resfail; | |
1501 | * }; | |
1502 | */ | |
bf269551 CL |
1503 | static int nfs3_xdr_dec_lookup3res(struct rpc_rqst *req, |
1504 | struct xdr_stream *xdr, | |
fc016483 | 1505 | void *data) |
e4f93234 | 1506 | { |
fc016483 | 1507 | struct nfs3_diropres *result = data; |
e4f93234 CL |
1508 | enum nfs_stat status; |
1509 | int error; | |
1510 | ||
bf269551 | 1511 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1512 | if (unlikely(error)) |
1513 | goto out; | |
1514 | if (status != NFS3_OK) | |
1515 | goto out_default; | |
bf269551 | 1516 | error = decode_nfs_fh3(xdr, result->fh); |
e4f93234 CL |
1517 | if (unlikely(error)) |
1518 | goto out; | |
bf269551 | 1519 | error = decode_post_op_attr(xdr, result->fattr); |
e4f93234 CL |
1520 | if (unlikely(error)) |
1521 | goto out; | |
bf269551 | 1522 | error = decode_post_op_attr(xdr, result->dir_attr); |
e4f93234 CL |
1523 | out: |
1524 | return error; | |
1525 | out_default: | |
bf269551 | 1526 | error = decode_post_op_attr(xdr, result->dir_attr); |
e4f93234 CL |
1527 | if (unlikely(error)) |
1528 | goto out; | |
5e7e5a0d | 1529 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1530 | } |
1531 | ||
e4f93234 CL |
1532 | /* |
1533 | * 3.3.4 ACCESS3res | |
1534 | * | |
1535 | * struct ACCESS3resok { | |
1536 | * post_op_attr obj_attributes; | |
1537 | * uint32 access; | |
1538 | * }; | |
1539 | * | |
1540 | * struct ACCESS3resfail { | |
1541 | * post_op_attr obj_attributes; | |
1542 | * }; | |
1543 | * | |
1544 | * union ACCESS3res switch (nfsstat3 status) { | |
1545 | * case NFS3_OK: | |
1546 | * ACCESS3resok resok; | |
1547 | * default: | |
1548 | * ACCESS3resfail resfail; | |
1549 | * }; | |
1550 | */ | |
bf269551 CL |
1551 | static int nfs3_xdr_dec_access3res(struct rpc_rqst *req, |
1552 | struct xdr_stream *xdr, | |
fc016483 | 1553 | void *data) |
e4f93234 | 1554 | { |
fc016483 | 1555 | struct nfs3_accessres *result = data; |
e4f93234 CL |
1556 | enum nfs_stat status; |
1557 | int error; | |
1558 | ||
bf269551 | 1559 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1560 | if (unlikely(error)) |
1561 | goto out; | |
bf269551 | 1562 | error = decode_post_op_attr(xdr, result->fattr); |
e4f93234 CL |
1563 | if (unlikely(error)) |
1564 | goto out; | |
1565 | if (status != NFS3_OK) | |
1566 | goto out_default; | |
bf269551 | 1567 | error = decode_uint32(xdr, &result->access); |
e4f93234 CL |
1568 | out: |
1569 | return error; | |
1570 | out_default: | |
5e7e5a0d | 1571 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1572 | } |
1573 | ||
e4f93234 CL |
1574 | /* |
1575 | * 3.3.5 READLINK3res | |
1576 | * | |
1577 | * struct READLINK3resok { | |
1578 | * post_op_attr symlink_attributes; | |
1579 | * nfspath3 data; | |
1580 | * }; | |
1581 | * | |
1582 | * struct READLINK3resfail { | |
1583 | * post_op_attr symlink_attributes; | |
1584 | * }; | |
1585 | * | |
1586 | * union READLINK3res switch (nfsstat3 status) { | |
1587 | * case NFS3_OK: | |
1588 | * READLINK3resok resok; | |
1589 | * default: | |
1590 | * READLINK3resfail resfail; | |
1591 | * }; | |
1592 | */ | |
bf269551 CL |
1593 | static int nfs3_xdr_dec_readlink3res(struct rpc_rqst *req, |
1594 | struct xdr_stream *xdr, | |
fc016483 | 1595 | void *result) |
e4f93234 | 1596 | { |
e4f93234 CL |
1597 | enum nfs_stat status; |
1598 | int error; | |
1599 | ||
bf269551 | 1600 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1601 | if (unlikely(error)) |
1602 | goto out; | |
bf269551 | 1603 | error = decode_post_op_attr(xdr, result); |
e4f93234 CL |
1604 | if (unlikely(error)) |
1605 | goto out; | |
1606 | if (status != NFS3_OK) | |
1607 | goto out_default; | |
bf269551 | 1608 | error = decode_nfspath3(xdr); |
e4f93234 CL |
1609 | out: |
1610 | return error; | |
1611 | out_default: | |
5e7e5a0d | 1612 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1613 | } |
1614 | ||
e4f93234 CL |
1615 | /* |
1616 | * 3.3.6 READ3res | |
1617 | * | |
1618 | * struct READ3resok { | |
1619 | * post_op_attr file_attributes; | |
1620 | * count3 count; | |
1621 | * bool eof; | |
1622 | * opaque data<>; | |
1623 | * }; | |
1624 | * | |
1625 | * struct READ3resfail { | |
1626 | * post_op_attr file_attributes; | |
1627 | * }; | |
1628 | * | |
1629 | * union READ3res switch (nfsstat3 status) { | |
1630 | * case NFS3_OK: | |
1631 | * READ3resok resok; | |
1632 | * default: | |
1633 | * READ3resfail resfail; | |
1634 | * }; | |
1635 | */ | |
1636 | static int decode_read3resok(struct xdr_stream *xdr, | |
9137bdf3 | 1637 | struct nfs_pgio_res *result) |
e4f93234 CL |
1638 | { |
1639 | u32 eof, count, ocount, recvd; | |
e4f93234 CL |
1640 | __be32 *p; |
1641 | ||
1642 | p = xdr_inline_decode(xdr, 4 + 4 + 4); | |
1643 | if (unlikely(p == NULL)) | |
1644 | goto out_overflow; | |
1645 | count = be32_to_cpup(p++); | |
1646 | eof = be32_to_cpup(p++); | |
1647 | ocount = be32_to_cpup(p++); | |
1648 | if (unlikely(ocount != count)) | |
1649 | goto out_mismatch; | |
64bd577e | 1650 | recvd = xdr_read_pages(xdr, count); |
e4f93234 CL |
1651 | if (unlikely(count > recvd)) |
1652 | goto out_cheating; | |
e4f93234 | 1653 | out: |
e4f93234 CL |
1654 | result->eof = eof; |
1655 | result->count = count; | |
1656 | return count; | |
1657 | out_mismatch: | |
1658 | dprintk("NFS: READ count doesn't match length of opaque: " | |
1659 | "count %u != ocount %u\n", count, ocount); | |
1660 | return -EIO; | |
1661 | out_cheating: | |
1662 | dprintk("NFS: server cheating in read result: " | |
1663 | "count %u > recvd %u\n", count, recvd); | |
1664 | count = recvd; | |
1665 | eof = 0; | |
1666 | goto out; | |
1667 | out_overflow: | |
1668 | print_overflow_msg(__func__, xdr); | |
1669 | return -EIO; | |
1670 | } | |
1671 | ||
bf269551 | 1672 | static int nfs3_xdr_dec_read3res(struct rpc_rqst *req, struct xdr_stream *xdr, |
fc016483 | 1673 | void *data) |
e4f93234 | 1674 | { |
fc016483 | 1675 | struct nfs_pgio_res *result = data; |
e4f93234 CL |
1676 | enum nfs_stat status; |
1677 | int error; | |
1678 | ||
bf269551 | 1679 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1680 | if (unlikely(error)) |
1681 | goto out; | |
bf269551 | 1682 | error = decode_post_op_attr(xdr, result->fattr); |
e4f93234 CL |
1683 | if (unlikely(error)) |
1684 | goto out; | |
aabff4dd | 1685 | result->op_status = status; |
e4f93234 CL |
1686 | if (status != NFS3_OK) |
1687 | goto out_status; | |
bf269551 | 1688 | error = decode_read3resok(xdr, result); |
e4f93234 CL |
1689 | out: |
1690 | return error; | |
1691 | out_status: | |
5e7e5a0d | 1692 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1693 | } |
1694 | ||
e4f93234 CL |
1695 | /* |
1696 | * 3.3.7 WRITE3res | |
1697 | * | |
1698 | * enum stable_how { | |
1699 | * UNSTABLE = 0, | |
1700 | * DATA_SYNC = 1, | |
1701 | * FILE_SYNC = 2 | |
1702 | * }; | |
1703 | * | |
1704 | * struct WRITE3resok { | |
1705 | * wcc_data file_wcc; | |
1706 | * count3 count; | |
1707 | * stable_how committed; | |
1708 | * writeverf3 verf; | |
1709 | * }; | |
1710 | * | |
1711 | * struct WRITE3resfail { | |
1712 | * wcc_data file_wcc; | |
1713 | * }; | |
1714 | * | |
1715 | * union WRITE3res switch (nfsstat3 status) { | |
1716 | * case NFS3_OK: | |
1717 | * WRITE3resok resok; | |
1718 | * default: | |
1719 | * WRITE3resfail resfail; | |
1720 | * }; | |
1721 | */ | |
1722 | static int decode_write3resok(struct xdr_stream *xdr, | |
9137bdf3 | 1723 | struct nfs_pgio_res *result) |
e4f93234 CL |
1724 | { |
1725 | __be32 *p; | |
1726 | ||
2f2c63bc | 1727 | p = xdr_inline_decode(xdr, 4 + 4); |
e4f93234 CL |
1728 | if (unlikely(p == NULL)) |
1729 | goto out_overflow; | |
1730 | result->count = be32_to_cpup(p++); | |
1731 | result->verf->committed = be32_to_cpup(p++); | |
1732 | if (unlikely(result->verf->committed > NFS_FILE_SYNC)) | |
1733 | goto out_badvalue; | |
2f2c63bc TM |
1734 | if (decode_writeverf3(xdr, &result->verf->verifier)) |
1735 | goto out_eio; | |
e4f93234 CL |
1736 | return result->count; |
1737 | out_badvalue: | |
1738 | dprintk("NFS: bad stable_how value: %u\n", result->verf->committed); | |
1739 | return -EIO; | |
1740 | out_overflow: | |
1741 | print_overflow_msg(__func__, xdr); | |
2f2c63bc | 1742 | out_eio: |
e4f93234 CL |
1743 | return -EIO; |
1744 | } | |
1745 | ||
bf269551 | 1746 | static int nfs3_xdr_dec_write3res(struct rpc_rqst *req, struct xdr_stream *xdr, |
fc016483 | 1747 | void *data) |
e4f93234 | 1748 | { |
fc016483 | 1749 | struct nfs_pgio_res *result = data; |
e4f93234 CL |
1750 | enum nfs_stat status; |
1751 | int error; | |
1752 | ||
bf269551 | 1753 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1754 | if (unlikely(error)) |
1755 | goto out; | |
bf269551 | 1756 | error = decode_wcc_data(xdr, result->fattr); |
e4f93234 CL |
1757 | if (unlikely(error)) |
1758 | goto out; | |
aabff4dd | 1759 | result->op_status = status; |
e4f93234 CL |
1760 | if (status != NFS3_OK) |
1761 | goto out_status; | |
bf269551 | 1762 | error = decode_write3resok(xdr, result); |
e4f93234 CL |
1763 | out: |
1764 | return error; | |
1765 | out_status: | |
5e7e5a0d | 1766 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1767 | } |
1768 | ||
e4f93234 CL |
1769 | /* |
1770 | * 3.3.8 CREATE3res | |
1771 | * | |
1772 | * struct CREATE3resok { | |
1773 | * post_op_fh3 obj; | |
1774 | * post_op_attr obj_attributes; | |
1775 | * wcc_data dir_wcc; | |
1776 | * }; | |
1777 | * | |
1778 | * struct CREATE3resfail { | |
1779 | * wcc_data dir_wcc; | |
1780 | * }; | |
1781 | * | |
1782 | * union CREATE3res switch (nfsstat3 status) { | |
1783 | * case NFS3_OK: | |
1784 | * CREATE3resok resok; | |
1785 | * default: | |
1786 | * CREATE3resfail resfail; | |
1787 | * }; | |
1788 | */ | |
1789 | static int decode_create3resok(struct xdr_stream *xdr, | |
1790 | struct nfs3_diropres *result) | |
1791 | { | |
1792 | int error; | |
1793 | ||
1794 | error = decode_post_op_fh3(xdr, result->fh); | |
1795 | if (unlikely(error)) | |
1796 | goto out; | |
1797 | error = decode_post_op_attr(xdr, result->fattr); | |
1798 | if (unlikely(error)) | |
1799 | goto out; | |
1800 | /* The server isn't required to return a file handle. | |
1801 | * If it didn't, force the client to perform a LOOKUP | |
1802 | * to determine the correct file handle and attribute | |
1803 | * values for the new object. */ | |
1804 | if (result->fh->size == 0) | |
1805 | result->fattr->valid = 0; | |
1806 | error = decode_wcc_data(xdr, result->dir_attr); | |
1807 | out: | |
1808 | return error; | |
1809 | } | |
1810 | ||
bf269551 CL |
1811 | static int nfs3_xdr_dec_create3res(struct rpc_rqst *req, |
1812 | struct xdr_stream *xdr, | |
fc016483 | 1813 | void *data) |
e4f93234 | 1814 | { |
fc016483 | 1815 | struct nfs3_diropres *result = data; |
e4f93234 CL |
1816 | enum nfs_stat status; |
1817 | int error; | |
1818 | ||
bf269551 | 1819 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1820 | if (unlikely(error)) |
1821 | goto out; | |
1822 | if (status != NFS3_OK) | |
1823 | goto out_default; | |
bf269551 | 1824 | error = decode_create3resok(xdr, result); |
e4f93234 CL |
1825 | out: |
1826 | return error; | |
1827 | out_default: | |
bf269551 | 1828 | error = decode_wcc_data(xdr, result->dir_attr); |
e4f93234 CL |
1829 | if (unlikely(error)) |
1830 | goto out; | |
5e7e5a0d | 1831 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1832 | } |
1833 | ||
1834 | /* | |
1835 | * 3.3.12 REMOVE3res | |
1836 | * | |
1837 | * struct REMOVE3resok { | |
1838 | * wcc_data dir_wcc; | |
1839 | * }; | |
1840 | * | |
1841 | * struct REMOVE3resfail { | |
1842 | * wcc_data dir_wcc; | |
1843 | * }; | |
1844 | * | |
1845 | * union REMOVE3res switch (nfsstat3 status) { | |
1846 | * case NFS3_OK: | |
1847 | * REMOVE3resok resok; | |
1848 | * default: | |
1849 | * REMOVE3resfail resfail; | |
1850 | * }; | |
1851 | */ | |
bf269551 CL |
1852 | static int nfs3_xdr_dec_remove3res(struct rpc_rqst *req, |
1853 | struct xdr_stream *xdr, | |
fc016483 | 1854 | void *data) |
e4f93234 | 1855 | { |
fc016483 | 1856 | struct nfs_removeres *result = data; |
e4f93234 CL |
1857 | enum nfs_stat status; |
1858 | int error; | |
1859 | ||
bf269551 | 1860 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1861 | if (unlikely(error)) |
1862 | goto out; | |
bf269551 | 1863 | error = decode_wcc_data(xdr, result->dir_attr); |
e4f93234 CL |
1864 | if (unlikely(error)) |
1865 | goto out; | |
1866 | if (status != NFS3_OK) | |
1867 | goto out_status; | |
1868 | out: | |
1869 | return error; | |
1870 | out_status: | |
5e7e5a0d | 1871 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1872 | } |
1873 | ||
e4f93234 CL |
1874 | /* |
1875 | * 3.3.14 RENAME3res | |
1876 | * | |
1877 | * struct RENAME3resok { | |
1878 | * wcc_data fromdir_wcc; | |
1879 | * wcc_data todir_wcc; | |
1880 | * }; | |
1881 | * | |
1882 | * struct RENAME3resfail { | |
1883 | * wcc_data fromdir_wcc; | |
1884 | * wcc_data todir_wcc; | |
1885 | * }; | |
1886 | * | |
1887 | * union RENAME3res switch (nfsstat3 status) { | |
1888 | * case NFS3_OK: | |
1889 | * RENAME3resok resok; | |
1890 | * default: | |
1891 | * RENAME3resfail resfail; | |
1892 | * }; | |
1893 | */ | |
bf269551 CL |
1894 | static int nfs3_xdr_dec_rename3res(struct rpc_rqst *req, |
1895 | struct xdr_stream *xdr, | |
fc016483 | 1896 | void *data) |
e4f93234 | 1897 | { |
fc016483 | 1898 | struct nfs_renameres *result = data; |
e4f93234 CL |
1899 | enum nfs_stat status; |
1900 | int error; | |
1901 | ||
bf269551 | 1902 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1903 | if (unlikely(error)) |
1904 | goto out; | |
bf269551 | 1905 | error = decode_wcc_data(xdr, result->old_fattr); |
e4f93234 CL |
1906 | if (unlikely(error)) |
1907 | goto out; | |
bf269551 | 1908 | error = decode_wcc_data(xdr, result->new_fattr); |
e4f93234 CL |
1909 | if (unlikely(error)) |
1910 | goto out; | |
1911 | if (status != NFS3_OK) | |
1912 | goto out_status; | |
1913 | out: | |
1914 | return error; | |
1915 | out_status: | |
5e7e5a0d | 1916 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1917 | } |
1918 | ||
e4f93234 CL |
1919 | /* |
1920 | * 3.3.15 LINK3res | |
1921 | * | |
1922 | * struct LINK3resok { | |
1923 | * post_op_attr file_attributes; | |
1924 | * wcc_data linkdir_wcc; | |
1925 | * }; | |
1926 | * | |
1927 | * struct LINK3resfail { | |
1928 | * post_op_attr file_attributes; | |
1929 | * wcc_data linkdir_wcc; | |
1930 | * }; | |
1931 | * | |
1932 | * union LINK3res switch (nfsstat3 status) { | |
1933 | * case NFS3_OK: | |
1934 | * LINK3resok resok; | |
1935 | * default: | |
1936 | * LINK3resfail resfail; | |
1937 | * }; | |
1938 | */ | |
bf269551 | 1939 | static int nfs3_xdr_dec_link3res(struct rpc_rqst *req, struct xdr_stream *xdr, |
fc016483 | 1940 | void *data) |
e4f93234 | 1941 | { |
fc016483 | 1942 | struct nfs3_linkres *result = data; |
e4f93234 CL |
1943 | enum nfs_stat status; |
1944 | int error; | |
1945 | ||
bf269551 | 1946 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
1947 | if (unlikely(error)) |
1948 | goto out; | |
bf269551 | 1949 | error = decode_post_op_attr(xdr, result->fattr); |
e4f93234 CL |
1950 | if (unlikely(error)) |
1951 | goto out; | |
bf269551 | 1952 | error = decode_wcc_data(xdr, result->dir_attr); |
e4f93234 CL |
1953 | if (unlikely(error)) |
1954 | goto out; | |
1955 | if (status != NFS3_OK) | |
1956 | goto out_status; | |
1957 | out: | |
1958 | return error; | |
1959 | out_status: | |
5e7e5a0d | 1960 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
1961 | } |
1962 | ||
1963 | /** | |
1964 | * nfs3_decode_dirent - Decode a single NFSv3 directory entry stored in | |
1965 | * the local page cache | |
1966 | * @xdr: XDR stream where entry resides | |
1967 | * @entry: buffer to fill in with entry data | |
e4f93234 CL |
1968 | * @plus: boolean indicating whether this should be a readdirplus entry |
1969 | * | |
573c4e1e CL |
1970 | * Returns zero if successful, otherwise a negative errno value is |
1971 | * returned. | |
e4f93234 CL |
1972 | * |
1973 | * This function is not invoked during READDIR reply decoding, but | |
1974 | * rather whenever an application invokes the getdents(2) system call | |
1975 | * on a directory already in our cache. | |
1976 | * | |
1977 | * 3.3.16 entry3 | |
1978 | * | |
1979 | * struct entry3 { | |
1980 | * fileid3 fileid; | |
1981 | * filename3 name; | |
1982 | * cookie3 cookie; | |
1983 | * fhandle3 filehandle; | |
1984 | * post_op_attr3 attributes; | |
1985 | * entry3 *nextentry; | |
1986 | * }; | |
1987 | * | |
1988 | * 3.3.17 entryplus3 | |
1989 | * struct entryplus3 { | |
1990 | * fileid3 fileid; | |
1991 | * filename3 name; | |
1992 | * cookie3 cookie; | |
1993 | * post_op_attr name_attributes; | |
1994 | * post_op_fh3 name_handle; | |
1995 | * entryplus3 *nextentry; | |
1996 | * }; | |
1997 | */ | |
573c4e1e | 1998 | int nfs3_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, |
a7a3b1e9 | 1999 | bool plus) |
e4f93234 CL |
2000 | { |
2001 | struct nfs_entry old = *entry; | |
2002 | __be32 *p; | |
2003 | int error; | |
98de9ce6 | 2004 | u64 new_cookie; |
e4f93234 CL |
2005 | |
2006 | p = xdr_inline_decode(xdr, 4); | |
2007 | if (unlikely(p == NULL)) | |
2008 | goto out_overflow; | |
2009 | if (*p == xdr_zero) { | |
2010 | p = xdr_inline_decode(xdr, 4); | |
2011 | if (unlikely(p == NULL)) | |
2012 | goto out_overflow; | |
2013 | if (*p == xdr_zero) | |
573c4e1e | 2014 | return -EAGAIN; |
e4f93234 | 2015 | entry->eof = 1; |
573c4e1e | 2016 | return -EBADCOOKIE; |
e4f93234 CL |
2017 | } |
2018 | ||
2019 | error = decode_fileid3(xdr, &entry->ino); | |
2020 | if (unlikely(error)) | |
573c4e1e | 2021 | return error; |
e4f93234 CL |
2022 | |
2023 | error = decode_inline_filename3(xdr, &entry->name, &entry->len); | |
2024 | if (unlikely(error)) | |
573c4e1e | 2025 | return error; |
e4f93234 | 2026 | |
98de9ce6 | 2027 | error = decode_cookie3(xdr, &new_cookie); |
e4f93234 | 2028 | if (unlikely(error)) |
573c4e1e | 2029 | return error; |
e4f93234 CL |
2030 | |
2031 | entry->d_type = DT_UNKNOWN; | |
2032 | ||
2033 | if (plus) { | |
2034 | entry->fattr->valid = 0; | |
2035 | error = decode_post_op_attr(xdr, entry->fattr); | |
2036 | if (unlikely(error)) | |
573c4e1e | 2037 | return error; |
e4f93234 CL |
2038 | if (entry->fattr->valid & NFS_ATTR_FATTR_V3) |
2039 | entry->d_type = nfs_umode_to_dtype(entry->fattr->mode); | |
2040 | ||
1ae04b25 TM |
2041 | if (entry->fattr->fileid != entry->ino) { |
2042 | entry->fattr->mounted_on_fileid = entry->ino; | |
2043 | entry->fattr->valid |= NFS_ATTR_FATTR_MOUNTED_ON_FILEID; | |
2044 | } | |
2045 | ||
e4f93234 CL |
2046 | /* In fact, a post_op_fh3: */ |
2047 | p = xdr_inline_decode(xdr, 4); | |
2048 | if (unlikely(p == NULL)) | |
2049 | goto out_overflow; | |
2050 | if (*p != xdr_zero) { | |
2051 | error = decode_nfs_fh3(xdr, entry->fh); | |
2052 | if (unlikely(error)) { | |
2053 | if (error == -E2BIG) | |
2054 | goto out_truncated; | |
573c4e1e | 2055 | return error; |
e4f93234 CL |
2056 | } |
2057 | } else | |
2058 | zero_nfs_fh3(entry->fh); | |
2059 | } | |
2060 | ||
98de9ce6 FS |
2061 | entry->prev_cookie = entry->cookie; |
2062 | entry->cookie = new_cookie; | |
2063 | ||
573c4e1e | 2064 | return 0; |
e4f93234 CL |
2065 | |
2066 | out_overflow: | |
2067 | print_overflow_msg(__func__, xdr); | |
573c4e1e | 2068 | return -EAGAIN; |
e4f93234 CL |
2069 | out_truncated: |
2070 | dprintk("NFS: directory entry contains invalid file handle\n"); | |
2071 | *entry = old; | |
573c4e1e | 2072 | return -EAGAIN; |
e4f93234 CL |
2073 | } |
2074 | ||
2075 | /* | |
2076 | * 3.3.16 READDIR3res | |
2077 | * | |
2078 | * struct dirlist3 { | |
2079 | * entry3 *entries; | |
2080 | * bool eof; | |
2081 | * }; | |
2082 | * | |
2083 | * struct READDIR3resok { | |
2084 | * post_op_attr dir_attributes; | |
2085 | * cookieverf3 cookieverf; | |
2086 | * dirlist3 reply; | |
2087 | * }; | |
2088 | * | |
2089 | * struct READDIR3resfail { | |
2090 | * post_op_attr dir_attributes; | |
2091 | * }; | |
2092 | * | |
2093 | * union READDIR3res switch (nfsstat3 status) { | |
2094 | * case NFS3_OK: | |
2095 | * READDIR3resok resok; | |
2096 | * default: | |
2097 | * READDIR3resfail resfail; | |
2098 | * }; | |
2099 | * | |
2100 | * Read the directory contents into the page cache, but otherwise | |
2101 | * don't touch them. The actual decoding is done by nfs3_decode_entry() | |
2102 | * during subsequent nfs_readdir() calls. | |
2103 | */ | |
2104 | static int decode_dirlist3(struct xdr_stream *xdr) | |
2105 | { | |
64bd577e | 2106 | return xdr_read_pages(xdr, xdr->buf->page_len); |
e4f93234 CL |
2107 | } |
2108 | ||
2109 | static int decode_readdir3resok(struct xdr_stream *xdr, | |
2110 | struct nfs3_readdirres *result) | |
2111 | { | |
2112 | int error; | |
2113 | ||
2114 | error = decode_post_op_attr(xdr, result->dir_attr); | |
2115 | if (unlikely(error)) | |
2116 | goto out; | |
2117 | /* XXX: do we need to check if result->verf != NULL ? */ | |
2118 | error = decode_cookieverf3(xdr, result->verf); | |
2119 | if (unlikely(error)) | |
2120 | goto out; | |
2121 | error = decode_dirlist3(xdr); | |
2122 | out: | |
2123 | return error; | |
2124 | } | |
2125 | ||
bf269551 CL |
2126 | static int nfs3_xdr_dec_readdir3res(struct rpc_rqst *req, |
2127 | struct xdr_stream *xdr, | |
fc016483 | 2128 | void *data) |
e4f93234 | 2129 | { |
fc016483 | 2130 | struct nfs3_readdirres *result = data; |
e4f93234 CL |
2131 | enum nfs_stat status; |
2132 | int error; | |
2133 | ||
bf269551 | 2134 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
2135 | if (unlikely(error)) |
2136 | goto out; | |
2137 | if (status != NFS3_OK) | |
2138 | goto out_default; | |
bf269551 | 2139 | error = decode_readdir3resok(xdr, result); |
e4f93234 CL |
2140 | out: |
2141 | return error; | |
2142 | out_default: | |
bf269551 | 2143 | error = decode_post_op_attr(xdr, result->dir_attr); |
e4f93234 CL |
2144 | if (unlikely(error)) |
2145 | goto out; | |
5e7e5a0d | 2146 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
2147 | } |
2148 | ||
e4f93234 CL |
2149 | /* |
2150 | * 3.3.18 FSSTAT3res | |
2151 | * | |
2152 | * struct FSSTAT3resok { | |
2153 | * post_op_attr obj_attributes; | |
2154 | * size3 tbytes; | |
2155 | * size3 fbytes; | |
2156 | * size3 abytes; | |
2157 | * size3 tfiles; | |
2158 | * size3 ffiles; | |
2159 | * size3 afiles; | |
2160 | * uint32 invarsec; | |
2161 | * }; | |
2162 | * | |
2163 | * struct FSSTAT3resfail { | |
2164 | * post_op_attr obj_attributes; | |
2165 | * }; | |
2166 | * | |
2167 | * union FSSTAT3res switch (nfsstat3 status) { | |
2168 | * case NFS3_OK: | |
2169 | * FSSTAT3resok resok; | |
2170 | * default: | |
2171 | * FSSTAT3resfail resfail; | |
2172 | * }; | |
2173 | */ | |
2174 | static int decode_fsstat3resok(struct xdr_stream *xdr, | |
2175 | struct nfs_fsstat *result) | |
2176 | { | |
2177 | __be32 *p; | |
2178 | ||
2179 | p = xdr_inline_decode(xdr, 8 * 6 + 4); | |
2180 | if (unlikely(p == NULL)) | |
2181 | goto out_overflow; | |
2182 | p = xdr_decode_size3(p, &result->tbytes); | |
2183 | p = xdr_decode_size3(p, &result->fbytes); | |
2184 | p = xdr_decode_size3(p, &result->abytes); | |
2185 | p = xdr_decode_size3(p, &result->tfiles); | |
2186 | p = xdr_decode_size3(p, &result->ffiles); | |
2187 | xdr_decode_size3(p, &result->afiles); | |
2188 | /* ignore invarsec */ | |
2189 | return 0; | |
2190 | out_overflow: | |
2191 | print_overflow_msg(__func__, xdr); | |
2192 | return -EIO; | |
2193 | } | |
2194 | ||
bf269551 CL |
2195 | static int nfs3_xdr_dec_fsstat3res(struct rpc_rqst *req, |
2196 | struct xdr_stream *xdr, | |
fc016483 | 2197 | void *data) |
e4f93234 | 2198 | { |
fc016483 | 2199 | struct nfs_fsstat *result = data; |
e4f93234 CL |
2200 | enum nfs_stat status; |
2201 | int error; | |
2202 | ||
bf269551 | 2203 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
2204 | if (unlikely(error)) |
2205 | goto out; | |
bf269551 | 2206 | error = decode_post_op_attr(xdr, result->fattr); |
e4f93234 CL |
2207 | if (unlikely(error)) |
2208 | goto out; | |
2209 | if (status != NFS3_OK) | |
2210 | goto out_status; | |
bf269551 | 2211 | error = decode_fsstat3resok(xdr, result); |
e4f93234 CL |
2212 | out: |
2213 | return error; | |
2214 | out_status: | |
5e7e5a0d | 2215 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
2216 | } |
2217 | ||
e4f93234 CL |
2218 | /* |
2219 | * 3.3.19 FSINFO3res | |
2220 | * | |
2221 | * struct FSINFO3resok { | |
2222 | * post_op_attr obj_attributes; | |
2223 | * uint32 rtmax; | |
2224 | * uint32 rtpref; | |
2225 | * uint32 rtmult; | |
2226 | * uint32 wtmax; | |
2227 | * uint32 wtpref; | |
2228 | * uint32 wtmult; | |
2229 | * uint32 dtpref; | |
2230 | * size3 maxfilesize; | |
2231 | * nfstime3 time_delta; | |
2232 | * uint32 properties; | |
2233 | * }; | |
2234 | * | |
2235 | * struct FSINFO3resfail { | |
2236 | * post_op_attr obj_attributes; | |
2237 | * }; | |
2238 | * | |
2239 | * union FSINFO3res switch (nfsstat3 status) { | |
2240 | * case NFS3_OK: | |
2241 | * FSINFO3resok resok; | |
2242 | * default: | |
2243 | * FSINFO3resfail resfail; | |
2244 | * }; | |
2245 | */ | |
2246 | static int decode_fsinfo3resok(struct xdr_stream *xdr, | |
2247 | struct nfs_fsinfo *result) | |
2248 | { | |
2249 | __be32 *p; | |
2250 | ||
2251 | p = xdr_inline_decode(xdr, 4 * 7 + 8 + 8 + 4); | |
2252 | if (unlikely(p == NULL)) | |
2253 | goto out_overflow; | |
2254 | result->rtmax = be32_to_cpup(p++); | |
2255 | result->rtpref = be32_to_cpup(p++); | |
2256 | result->rtmult = be32_to_cpup(p++); | |
2257 | result->wtmax = be32_to_cpup(p++); | |
2258 | result->wtpref = be32_to_cpup(p++); | |
2259 | result->wtmult = be32_to_cpup(p++); | |
2260 | result->dtpref = be32_to_cpup(p++); | |
2261 | p = xdr_decode_size3(p, &result->maxfilesize); | |
f6048709 | 2262 | xdr_decode_nfstime3(p, &result->time_delta); |
e4f93234 CL |
2263 | |
2264 | /* ignore properties */ | |
2265 | result->lease_time = 0; | |
2266 | return 0; | |
2267 | out_overflow: | |
2268 | print_overflow_msg(__func__, xdr); | |
2269 | return -EIO; | |
2270 | } | |
2271 | ||
bf269551 CL |
2272 | static int nfs3_xdr_dec_fsinfo3res(struct rpc_rqst *req, |
2273 | struct xdr_stream *xdr, | |
fc016483 | 2274 | void *data) |
e4f93234 | 2275 | { |
fc016483 | 2276 | struct nfs_fsinfo *result = data; |
e4f93234 CL |
2277 | enum nfs_stat status; |
2278 | int error; | |
2279 | ||
bf269551 | 2280 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
2281 | if (unlikely(error)) |
2282 | goto out; | |
bf269551 | 2283 | error = decode_post_op_attr(xdr, result->fattr); |
e4f93234 CL |
2284 | if (unlikely(error)) |
2285 | goto out; | |
2286 | if (status != NFS3_OK) | |
2287 | goto out_status; | |
bf269551 | 2288 | error = decode_fsinfo3resok(xdr, result); |
e4f93234 CL |
2289 | out: |
2290 | return error; | |
2291 | out_status: | |
5e7e5a0d | 2292 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
2293 | } |
2294 | ||
e4f93234 CL |
2295 | /* |
2296 | * 3.3.20 PATHCONF3res | |
2297 | * | |
2298 | * struct PATHCONF3resok { | |
2299 | * post_op_attr obj_attributes; | |
2300 | * uint32 linkmax; | |
2301 | * uint32 name_max; | |
2302 | * bool no_trunc; | |
2303 | * bool chown_restricted; | |
2304 | * bool case_insensitive; | |
2305 | * bool case_preserving; | |
2306 | * }; | |
2307 | * | |
2308 | * struct PATHCONF3resfail { | |
2309 | * post_op_attr obj_attributes; | |
2310 | * }; | |
2311 | * | |
2312 | * union PATHCONF3res switch (nfsstat3 status) { | |
2313 | * case NFS3_OK: | |
2314 | * PATHCONF3resok resok; | |
2315 | * default: | |
2316 | * PATHCONF3resfail resfail; | |
2317 | * }; | |
2318 | */ | |
2319 | static int decode_pathconf3resok(struct xdr_stream *xdr, | |
2320 | struct nfs_pathconf *result) | |
2321 | { | |
2322 | __be32 *p; | |
2323 | ||
2324 | p = xdr_inline_decode(xdr, 4 * 6); | |
2325 | if (unlikely(p == NULL)) | |
2326 | goto out_overflow; | |
2327 | result->max_link = be32_to_cpup(p++); | |
2328 | result->max_namelen = be32_to_cpup(p); | |
2329 | /* ignore remaining fields */ | |
2330 | return 0; | |
2331 | out_overflow: | |
2332 | print_overflow_msg(__func__, xdr); | |
2333 | return -EIO; | |
2334 | } | |
2335 | ||
bf269551 CL |
2336 | static int nfs3_xdr_dec_pathconf3res(struct rpc_rqst *req, |
2337 | struct xdr_stream *xdr, | |
fc016483 | 2338 | void *data) |
e4f93234 | 2339 | { |
fc016483 | 2340 | struct nfs_pathconf *result = data; |
e4f93234 CL |
2341 | enum nfs_stat status; |
2342 | int error; | |
2343 | ||
bf269551 | 2344 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
2345 | if (unlikely(error)) |
2346 | goto out; | |
bf269551 | 2347 | error = decode_post_op_attr(xdr, result->fattr); |
e4f93234 CL |
2348 | if (unlikely(error)) |
2349 | goto out; | |
2350 | if (status != NFS3_OK) | |
2351 | goto out_status; | |
bf269551 | 2352 | error = decode_pathconf3resok(xdr, result); |
e4f93234 CL |
2353 | out: |
2354 | return error; | |
2355 | out_status: | |
5e7e5a0d | 2356 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
2357 | } |
2358 | ||
e4f93234 CL |
2359 | /* |
2360 | * 3.3.21 COMMIT3res | |
2361 | * | |
2362 | * struct COMMIT3resok { | |
2363 | * wcc_data file_wcc; | |
2364 | * writeverf3 verf; | |
2365 | * }; | |
2366 | * | |
2367 | * struct COMMIT3resfail { | |
2368 | * wcc_data file_wcc; | |
2369 | * }; | |
2370 | * | |
2371 | * union COMMIT3res switch (nfsstat3 status) { | |
2372 | * case NFS3_OK: | |
2373 | * COMMIT3resok resok; | |
2374 | * default: | |
2375 | * COMMIT3resfail resfail; | |
2376 | * }; | |
2377 | */ | |
bf269551 CL |
2378 | static int nfs3_xdr_dec_commit3res(struct rpc_rqst *req, |
2379 | struct xdr_stream *xdr, | |
fc016483 | 2380 | void *data) |
e4f93234 | 2381 | { |
fc016483 | 2382 | struct nfs_commitres *result = data; |
e4f93234 CL |
2383 | enum nfs_stat status; |
2384 | int error; | |
2385 | ||
bf269551 | 2386 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
2387 | if (unlikely(error)) |
2388 | goto out; | |
bf269551 | 2389 | error = decode_wcc_data(xdr, result->fattr); |
e4f93234 CL |
2390 | if (unlikely(error)) |
2391 | goto out; | |
aabff4dd | 2392 | result->op_status = status; |
e4f93234 CL |
2393 | if (status != NFS3_OK) |
2394 | goto out_status; | |
2f2c63bc | 2395 | error = decode_writeverf3(xdr, &result->verf->verifier); |
e4f93234 CL |
2396 | out: |
2397 | return error; | |
2398 | out_status: | |
5e7e5a0d | 2399 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
2400 | } |
2401 | ||
b7fa0554 | 2402 | #ifdef CONFIG_NFS_V3_ACL |
b7fa0554 | 2403 | |
e4f93234 CL |
2404 | static inline int decode_getacl3resok(struct xdr_stream *xdr, |
2405 | struct nfs3_getaclres *result) | |
2406 | { | |
2407 | struct posix_acl **acl; | |
2408 | unsigned int *aclcnt; | |
2409 | size_t hdrlen; | |
2410 | int error; | |
2411 | ||
2412 | error = decode_post_op_attr(xdr, result->fattr); | |
2413 | if (unlikely(error)) | |
2414 | goto out; | |
2415 | error = decode_uint32(xdr, &result->mask); | |
2416 | if (unlikely(error)) | |
2417 | goto out; | |
2418 | error = -EINVAL; | |
2419 | if (result->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT)) | |
2420 | goto out; | |
2421 | ||
1aecca3e | 2422 | hdrlen = xdr_stream_pos(xdr); |
e4f93234 CL |
2423 | |
2424 | acl = NULL; | |
2425 | if (result->mask & NFS_ACL) | |
2426 | acl = &result->acl_access; | |
2427 | aclcnt = NULL; | |
2428 | if (result->mask & NFS_ACLCNT) | |
2429 | aclcnt = &result->acl_access_count; | |
2430 | error = nfsacl_decode(xdr->buf, hdrlen, aclcnt, acl); | |
2431 | if (unlikely(error <= 0)) | |
2432 | goto out; | |
2433 | ||
2434 | acl = NULL; | |
2435 | if (result->mask & NFS_DFACL) | |
2436 | acl = &result->acl_default; | |
2437 | aclcnt = NULL; | |
2438 | if (result->mask & NFS_DFACLCNT) | |
2439 | aclcnt = &result->acl_default_count; | |
2440 | error = nfsacl_decode(xdr->buf, hdrlen + error, aclcnt, acl); | |
2441 | if (unlikely(error <= 0)) | |
2442 | return error; | |
2443 | error = 0; | |
2444 | out: | |
2445 | return error; | |
2446 | } | |
2447 | ||
bf269551 CL |
2448 | static int nfs3_xdr_dec_getacl3res(struct rpc_rqst *req, |
2449 | struct xdr_stream *xdr, | |
fc016483 | 2450 | void *result) |
e4f93234 | 2451 | { |
e4f93234 CL |
2452 | enum nfs_stat status; |
2453 | int error; | |
2454 | ||
bf269551 | 2455 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
2456 | if (unlikely(error)) |
2457 | goto out; | |
2458 | if (status != NFS3_OK) | |
2459 | goto out_default; | |
bf269551 | 2460 | error = decode_getacl3resok(xdr, result); |
e4f93234 CL |
2461 | out: |
2462 | return error; | |
2463 | out_default: | |
5e7e5a0d | 2464 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
2465 | } |
2466 | ||
bf269551 CL |
2467 | static int nfs3_xdr_dec_setacl3res(struct rpc_rqst *req, |
2468 | struct xdr_stream *xdr, | |
fc016483 | 2469 | void *result) |
e4f93234 | 2470 | { |
e4f93234 CL |
2471 | enum nfs_stat status; |
2472 | int error; | |
2473 | ||
bf269551 | 2474 | error = decode_nfsstat3(xdr, &status); |
e4f93234 CL |
2475 | if (unlikely(error)) |
2476 | goto out; | |
2477 | if (status != NFS3_OK) | |
2478 | goto out_default; | |
bf269551 | 2479 | error = decode_post_op_attr(xdr, result); |
e4f93234 CL |
2480 | out: |
2481 | return error; | |
2482 | out_default: | |
5e7e5a0d | 2483 | return nfs3_stat_to_errno(status); |
e4f93234 CL |
2484 | } |
2485 | ||
b7fa0554 AG |
2486 | #endif /* CONFIG_NFS_V3_ACL */ |
2487 | ||
5e7e5a0d BS |
2488 | |
2489 | /* | |
2490 | * We need to translate between nfs status return values and | |
2491 | * the local errno values which may not be the same. | |
2492 | */ | |
2493 | static const struct { | |
2494 | int stat; | |
2495 | int errno; | |
2496 | } nfs_errtbl[] = { | |
2497 | { NFS_OK, 0 }, | |
2498 | { NFSERR_PERM, -EPERM }, | |
2499 | { NFSERR_NOENT, -ENOENT }, | |
2500 | { NFSERR_IO, -errno_NFSERR_IO}, | |
2501 | { NFSERR_NXIO, -ENXIO }, | |
2502 | /* { NFSERR_EAGAIN, -EAGAIN }, */ | |
2503 | { NFSERR_ACCES, -EACCES }, | |
2504 | { NFSERR_EXIST, -EEXIST }, | |
2505 | { NFSERR_XDEV, -EXDEV }, | |
2506 | { NFSERR_NODEV, -ENODEV }, | |
2507 | { NFSERR_NOTDIR, -ENOTDIR }, | |
2508 | { NFSERR_ISDIR, -EISDIR }, | |
2509 | { NFSERR_INVAL, -EINVAL }, | |
2510 | { NFSERR_FBIG, -EFBIG }, | |
2511 | { NFSERR_NOSPC, -ENOSPC }, | |
2512 | { NFSERR_ROFS, -EROFS }, | |
2513 | { NFSERR_MLINK, -EMLINK }, | |
2514 | { NFSERR_NAMETOOLONG, -ENAMETOOLONG }, | |
2515 | { NFSERR_NOTEMPTY, -ENOTEMPTY }, | |
2516 | { NFSERR_DQUOT, -EDQUOT }, | |
2517 | { NFSERR_STALE, -ESTALE }, | |
2518 | { NFSERR_REMOTE, -EREMOTE }, | |
2519 | #ifdef EWFLUSH | |
2520 | { NFSERR_WFLUSH, -EWFLUSH }, | |
2521 | #endif | |
2522 | { NFSERR_BADHANDLE, -EBADHANDLE }, | |
2523 | { NFSERR_NOT_SYNC, -ENOTSYNC }, | |
2524 | { NFSERR_BAD_COOKIE, -EBADCOOKIE }, | |
2525 | { NFSERR_NOTSUPP, -ENOTSUPP }, | |
2526 | { NFSERR_TOOSMALL, -ETOOSMALL }, | |
2527 | { NFSERR_SERVERFAULT, -EREMOTEIO }, | |
2528 | { NFSERR_BADTYPE, -EBADTYPE }, | |
2529 | { NFSERR_JUKEBOX, -EJUKEBOX }, | |
2530 | { -1, -EIO } | |
2531 | }; | |
2532 | ||
2533 | /** | |
2534 | * nfs3_stat_to_errno - convert an NFS status code to a local errno | |
2535 | * @status: NFS status code to convert | |
2536 | * | |
2537 | * Returns a local errno value, or -EIO if the NFS status code is | |
2538 | * not recognized. This function is used jointly by NFSv2 and NFSv3. | |
2539 | */ | |
2540 | static int nfs3_stat_to_errno(enum nfs_stat status) | |
2541 | { | |
2542 | int i; | |
2543 | ||
2544 | for (i = 0; nfs_errtbl[i].stat != -1; i++) { | |
2545 | if (nfs_errtbl[i].stat == (int)status) | |
2546 | return nfs_errtbl[i].errno; | |
2547 | } | |
2548 | dprintk("NFS: Unrecognized nfs status value: %u\n", status); | |
2549 | return nfs_errtbl[i].errno; | |
2550 | } | |
2551 | ||
2552 | ||
1da177e4 LT |
2553 | #define PROC(proc, argtype, restype, timer) \ |
2554 | [NFS3PROC_##proc] = { \ | |
2555 | .p_proc = NFS3PROC_##proc, \ | |
fcc85819 | 2556 | .p_encode = nfs3_xdr_enc_##argtype##3args, \ |
fc016483 | 2557 | .p_decode = nfs3_xdr_dec_##restype##3res, \ |
ad96b5b5 | 2558 | .p_arglen = NFS3_##argtype##args_sz, \ |
f5fc3c50 | 2559 | .p_replen = NFS3_##restype##res_sz, \ |
cc0175c1 CL |
2560 | .p_timer = timer, \ |
2561 | .p_statidx = NFS3PROC_##proc, \ | |
2562 | .p_name = #proc, \ | |
1da177e4 LT |
2563 | } |
2564 | ||
511e936b | 2565 | const struct rpc_procinfo nfs3_procedures[] = { |
f5fc3c50 CL |
2566 | PROC(GETATTR, getattr, getattr, 1), |
2567 | PROC(SETATTR, setattr, setattr, 0), | |
2568 | PROC(LOOKUP, lookup, lookup, 2), | |
2569 | PROC(ACCESS, access, access, 1), | |
2570 | PROC(READLINK, readlink, readlink, 3), | |
2571 | PROC(READ, read, read, 3), | |
2572 | PROC(WRITE, write, write, 4), | |
2573 | PROC(CREATE, create, create, 0), | |
2574 | PROC(MKDIR, mkdir, create, 0), | |
2575 | PROC(SYMLINK, symlink, create, 0), | |
2576 | PROC(MKNOD, mknod, create, 0), | |
2577 | PROC(REMOVE, remove, remove, 0), | |
2578 | PROC(RMDIR, lookup, setattr, 0), | |
2579 | PROC(RENAME, rename, rename, 0), | |
2580 | PROC(LINK, link, link, 0), | |
2581 | PROC(READDIR, readdir, readdir, 3), | |
2582 | PROC(READDIRPLUS, readdirplus, readdir, 3), | |
2583 | PROC(FSSTAT, getattr, fsstat, 0), | |
2584 | PROC(FSINFO, getattr, fsinfo, 0), | |
2585 | PROC(PATHCONF, getattr, pathconf, 0), | |
2586 | PROC(COMMIT, commit, commit, 5), | |
1da177e4 LT |
2587 | }; |
2588 | ||
c551858a | 2589 | static unsigned int nfs_version3_counts[ARRAY_SIZE(nfs3_procedures)]; |
a613fa16 | 2590 | const struct rpc_version nfs_version3 = { |
1da177e4 | 2591 | .number = 3, |
e8c96f8c | 2592 | .nrprocs = ARRAY_SIZE(nfs3_procedures), |
c551858a CH |
2593 | .procs = nfs3_procedures, |
2594 | .counts = nfs_version3_counts, | |
1da177e4 LT |
2595 | }; |
2596 | ||
b7fa0554 | 2597 | #ifdef CONFIG_NFS_V3_ACL |
511e936b | 2598 | static const struct rpc_procinfo nfs3_acl_procedures[] = { |
b7fa0554 AG |
2599 | [ACLPROC3_GETACL] = { |
2600 | .p_proc = ACLPROC3_GETACL, | |
fcc85819 | 2601 | .p_encode = nfs3_xdr_enc_getacl3args, |
fc016483 | 2602 | .p_decode = nfs3_xdr_dec_getacl3res, |
2bea90d4 CL |
2603 | .p_arglen = ACL3_getaclargs_sz, |
2604 | .p_replen = ACL3_getaclres_sz, | |
b7fa0554 | 2605 | .p_timer = 1, |
cc0175c1 | 2606 | .p_name = "GETACL", |
b7fa0554 AG |
2607 | }, |
2608 | [ACLPROC3_SETACL] = { | |
2609 | .p_proc = ACLPROC3_SETACL, | |
fcc85819 | 2610 | .p_encode = nfs3_xdr_enc_setacl3args, |
fc016483 | 2611 | .p_decode = nfs3_xdr_dec_setacl3res, |
2bea90d4 CL |
2612 | .p_arglen = ACL3_setaclargs_sz, |
2613 | .p_replen = ACL3_setaclres_sz, | |
b7fa0554 | 2614 | .p_timer = 0, |
cc0175c1 | 2615 | .p_name = "SETACL", |
b7fa0554 AG |
2616 | }, |
2617 | }; | |
2618 | ||
c551858a | 2619 | static unsigned int nfs3_acl_counts[ARRAY_SIZE(nfs3_acl_procedures)]; |
a613fa16 | 2620 | const struct rpc_version nfsacl_version3 = { |
b7fa0554 | 2621 | .number = 3, |
9ae7d8ff | 2622 | .nrprocs = ARRAY_SIZE(nfs3_acl_procedures), |
b7fa0554 | 2623 | .procs = nfs3_acl_procedures, |
c551858a | 2624 | .counts = nfs3_acl_counts, |
b7fa0554 AG |
2625 | }; |
2626 | #endif /* CONFIG_NFS_V3_ACL */ |