Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/fs/nfs/nfs2xdr.c | |
3 | * | |
4 | * XDR functions to encode/decode NFS RPC arguments and results. | |
5 | * | |
6 | * Copyright (C) 1992, 1993, 1994 Rick Sladkey | |
7 | * Copyright (C) 1996 Olaf Kirch | |
8 | * 04 Aug 1998 Ion Badulescu <ionut@cs.columbia.edu> | |
9 | * FIFO's need special handling in NFSv2 | |
10 | */ | |
11 | ||
12 | #include <linux/param.h> | |
13 | #include <linux/time.h> | |
14 | #include <linux/mm.h> | |
1da177e4 LT |
15 | #include <linux/errno.h> |
16 | #include <linux/string.h> | |
17 | #include <linux/in.h> | |
18 | #include <linux/pagemap.h> | |
19 | #include <linux/proc_fs.h> | |
20 | #include <linux/sunrpc/clnt.h> | |
21 | #include <linux/nfs.h> | |
22 | #include <linux/nfs2.h> | |
23 | #include <linux/nfs_fs.h> | |
816724e6 | 24 | #include "internal.h" |
1da177e4 LT |
25 | |
26 | #define NFSDBG_FACILITY NFSDBG_XDR | |
1da177e4 | 27 | |
1da177e4 LT |
28 | /* Mapping from NFS error code to "errno" error code. */ |
29 | #define errno_NFSERR_IO EIO | |
30 | ||
31 | /* | |
32 | * Declare the space requirements for NFS arguments and replies as | |
33 | * number of 32bit-words | |
34 | */ | |
35 | #define NFS_fhandle_sz (8) | |
36 | #define NFS_sattr_sz (8) | |
37 | #define NFS_filename_sz (1+(NFS2_MAXNAMLEN>>2)) | |
38 | #define NFS_path_sz (1+(NFS2_MAXPATHLEN>>2)) | |
39 | #define NFS_fattr_sz (17) | |
40 | #define NFS_info_sz (5) | |
41 | #define NFS_entry_sz (NFS_filename_sz+3) | |
42 | ||
43 | #define NFS_diropargs_sz (NFS_fhandle_sz+NFS_filename_sz) | |
4fdc17b2 | 44 | #define NFS_removeargs_sz (NFS_fhandle_sz+NFS_filename_sz) |
1da177e4 LT |
45 | #define NFS_sattrargs_sz (NFS_fhandle_sz+NFS_sattr_sz) |
46 | #define NFS_readlinkargs_sz (NFS_fhandle_sz) | |
47 | #define NFS_readargs_sz (NFS_fhandle_sz+3) | |
48 | #define NFS_writeargs_sz (NFS_fhandle_sz+4) | |
49 | #define NFS_createargs_sz (NFS_diropargs_sz+NFS_sattr_sz) | |
50 | #define NFS_renameargs_sz (NFS_diropargs_sz+NFS_diropargs_sz) | |
51 | #define NFS_linkargs_sz (NFS_fhandle_sz+NFS_diropargs_sz) | |
94a6d753 | 52 | #define NFS_symlinkargs_sz (NFS_diropargs_sz+1+NFS_sattr_sz) |
1da177e4 LT |
53 | #define NFS_readdirargs_sz (NFS_fhandle_sz+2) |
54 | ||
55 | #define NFS_attrstat_sz (1+NFS_fattr_sz) | |
56 | #define NFS_diropres_sz (1+NFS_fhandle_sz+NFS_fattr_sz) | |
57 | #define NFS_readlinkres_sz (2) | |
58 | #define NFS_readres_sz (1+NFS_fattr_sz+1) | |
59 | #define NFS_writeres_sz (NFS_attrstat_sz) | |
60 | #define NFS_stat_sz (1) | |
61 | #define NFS_readdirres_sz (1) | |
62 | #define NFS_statfsres_sz (1+NFS_info_sz) | |
63 | ||
5e7e5a0d | 64 | static int nfs_stat_to_errno(enum nfs_stat); |
25a0866c CL |
65 | |
66 | /* | |
67 | * While encoding arguments, set up the reply buffer in advance to | |
68 | * receive reply data directly into the page cache. | |
69 | */ | |
70 | static void prepare_reply_buffer(struct rpc_rqst *req, struct page **pages, | |
71 | unsigned int base, unsigned int len, | |
72 | unsigned int bufsize) | |
73 | { | |
74 | struct rpc_auth *auth = req->rq_cred->cr_auth; | |
75 | unsigned int replen; | |
76 | ||
77 | replen = RPC_REPHDRSIZE + auth->au_rslack + bufsize; | |
78 | xdr_inline_pages(&req->rq_rcv_buf, replen << 2, pages, base, len); | |
79 | } | |
80 | ||
f796f8b3 CL |
81 | /* |
82 | * Handle decode buffer overflows out-of-line. | |
83 | */ | |
84 | static void print_overflow_msg(const char *func, const struct xdr_stream *xdr) | |
85 | { | |
86 | dprintk("NFS: %s prematurely hit the end of our receive buffer. " | |
87 | "Remaining buffer length is %tu words.\n", | |
88 | func, xdr->end - xdr->p); | |
89 | } | |
90 | ||
25a0866c | 91 | |
25a0866c CL |
92 | /* |
93 | * Encode/decode NFSv2 basic data types | |
94 | * | |
95 | * Basic NFSv2 data types are defined in section 2.3 of RFC 1094: | |
96 | * "NFS: Network File System Protocol Specification". | |
97 | * | |
98 | * Not all basic data types have their own encoding and decoding | |
99 | * functions. For run-time efficiency, some data types are encoded | |
100 | * or decoded inline. | |
101 | */ | |
102 | ||
f796f8b3 CL |
103 | /* |
104 | * typedef opaque nfsdata<>; | |
105 | */ | |
106 | static int decode_nfsdata(struct xdr_stream *xdr, struct nfs_readres *result) | |
107 | { | |
108 | u32 recvd, count; | |
f796f8b3 CL |
109 | __be32 *p; |
110 | ||
111 | p = xdr_inline_decode(xdr, 4); | |
112 | if (unlikely(p == NULL)) | |
113 | goto out_overflow; | |
114 | count = be32_to_cpup(p); | |
64bd577e | 115 | recvd = xdr_read_pages(xdr, count); |
f796f8b3 CL |
116 | if (unlikely(count > recvd)) |
117 | goto out_cheating; | |
118 | out: | |
f796f8b3 CL |
119 | result->eof = 0; /* NFSv2 does not pass EOF flag on the wire. */ |
120 | result->count = count; | |
121 | return count; | |
122 | out_cheating: | |
123 | dprintk("NFS: server cheating in read result: " | |
124 | "count %u > recvd %u\n", count, recvd); | |
125 | count = recvd; | |
126 | goto out; | |
127 | out_overflow: | |
128 | print_overflow_msg(__func__, xdr); | |
129 | return -EIO; | |
130 | } | |
131 | ||
132 | /* | |
133 | * enum stat { | |
134 | * NFS_OK = 0, | |
135 | * NFSERR_PERM = 1, | |
136 | * NFSERR_NOENT = 2, | |
137 | * NFSERR_IO = 5, | |
138 | * NFSERR_NXIO = 6, | |
139 | * NFSERR_ACCES = 13, | |
140 | * NFSERR_EXIST = 17, | |
141 | * NFSERR_NODEV = 19, | |
142 | * NFSERR_NOTDIR = 20, | |
143 | * NFSERR_ISDIR = 21, | |
144 | * NFSERR_FBIG = 27, | |
145 | * NFSERR_NOSPC = 28, | |
146 | * NFSERR_ROFS = 30, | |
147 | * NFSERR_NAMETOOLONG = 63, | |
148 | * NFSERR_NOTEMPTY = 66, | |
149 | * NFSERR_DQUOT = 69, | |
150 | * NFSERR_STALE = 70, | |
151 | * NFSERR_WFLUSH = 99 | |
152 | * }; | |
153 | */ | |
154 | static int decode_stat(struct xdr_stream *xdr, enum nfs_stat *status) | |
155 | { | |
156 | __be32 *p; | |
157 | ||
158 | p = xdr_inline_decode(xdr, 4); | |
159 | if (unlikely(p == NULL)) | |
160 | goto out_overflow; | |
161 | *status = be32_to_cpup(p); | |
162 | return 0; | |
163 | out_overflow: | |
164 | print_overflow_msg(__func__, xdr); | |
165 | return -EIO; | |
166 | } | |
167 | ||
5f96e5e3 CL |
168 | /* |
169 | * 2.3.2. ftype | |
170 | * | |
171 | * enum ftype { | |
172 | * NFNON = 0, | |
173 | * NFREG = 1, | |
174 | * NFDIR = 2, | |
175 | * NFBLK = 3, | |
176 | * NFCHR = 4, | |
177 | * NFLNK = 5 | |
178 | * }; | |
179 | * | |
180 | */ | |
181 | static __be32 *xdr_decode_ftype(__be32 *p, u32 *type) | |
182 | { | |
183 | *type = be32_to_cpup(p++); | |
184 | if (unlikely(*type > NF2FIFO)) | |
185 | *type = NFBAD; | |
186 | return p; | |
187 | } | |
188 | ||
25a0866c CL |
189 | /* |
190 | * 2.3.3. fhandle | |
191 | * | |
192 | * typedef opaque fhandle[FHSIZE]; | |
193 | */ | |
194 | static void encode_fhandle(struct xdr_stream *xdr, const struct nfs_fh *fh) | |
195 | { | |
196 | __be32 *p; | |
197 | ||
25a0866c CL |
198 | p = xdr_reserve_space(xdr, NFS2_FHSIZE); |
199 | memcpy(p, fh->data, NFS2_FHSIZE); | |
200 | } | |
201 | ||
f796f8b3 CL |
202 | static int decode_fhandle(struct xdr_stream *xdr, struct nfs_fh *fh) |
203 | { | |
204 | __be32 *p; | |
205 | ||
206 | p = xdr_inline_decode(xdr, NFS2_FHSIZE); | |
207 | if (unlikely(p == NULL)) | |
208 | goto out_overflow; | |
209 | fh->size = NFS2_FHSIZE; | |
210 | memcpy(fh->data, p, NFS2_FHSIZE); | |
211 | return 0; | |
212 | out_overflow: | |
213 | print_overflow_msg(__func__, xdr); | |
214 | return -EIO; | |
215 | } | |
216 | ||
282ac2a5 CL |
217 | /* |
218 | * 2.3.4. timeval | |
219 | * | |
220 | * struct timeval { | |
221 | * unsigned int seconds; | |
222 | * unsigned int useconds; | |
223 | * }; | |
224 | */ | |
225 | static __be32 *xdr_encode_time(__be32 *p, const struct timespec *timep) | |
226 | { | |
227 | *p++ = cpu_to_be32(timep->tv_sec); | |
228 | if (timep->tv_nsec != 0) | |
229 | *p++ = cpu_to_be32(timep->tv_nsec / NSEC_PER_USEC); | |
230 | else | |
231 | *p++ = cpu_to_be32(0); | |
232 | return p; | |
233 | } | |
234 | ||
235 | /* | |
236 | * Passing the invalid value useconds=1000000 is a Sun convention for | |
237 | * "set to current server time". It's needed to make permissions checks | |
238 | * for the "touch" program across v2 mounts to Solaris and Irix servers | |
239 | * work correctly. See description of sattr in section 6.1 of "NFS | |
240 | * Illustrated" by Brent Callaghan, Addison-Wesley, ISBN 0-201-32750-5. | |
241 | */ | |
242 | static __be32 *xdr_encode_current_server_time(__be32 *p, | |
243 | const struct timespec *timep) | |
244 | { | |
245 | *p++ = cpu_to_be32(timep->tv_sec); | |
246 | *p++ = cpu_to_be32(1000000); | |
247 | return p; | |
248 | } | |
249 | ||
5f96e5e3 CL |
250 | static __be32 *xdr_decode_time(__be32 *p, struct timespec *timep) |
251 | { | |
252 | timep->tv_sec = be32_to_cpup(p++); | |
253 | timep->tv_nsec = be32_to_cpup(p++) * NSEC_PER_USEC; | |
254 | return p; | |
255 | } | |
256 | ||
f796f8b3 CL |
257 | /* |
258 | * 2.3.5. fattr | |
259 | * | |
260 | * struct fattr { | |
261 | * ftype type; | |
262 | * unsigned int mode; | |
263 | * unsigned int nlink; | |
264 | * unsigned int uid; | |
265 | * unsigned int gid; | |
266 | * unsigned int size; | |
267 | * unsigned int blocksize; | |
268 | * unsigned int rdev; | |
269 | * unsigned int blocks; | |
270 | * unsigned int fsid; | |
271 | * unsigned int fileid; | |
272 | * timeval atime; | |
273 | * timeval mtime; | |
274 | * timeval ctime; | |
275 | * }; | |
276 | * | |
277 | */ | |
278 | static int decode_fattr(struct xdr_stream *xdr, struct nfs_fattr *fattr) | |
279 | { | |
5f96e5e3 | 280 | u32 rdev, type; |
f796f8b3 CL |
281 | __be32 *p; |
282 | ||
283 | p = xdr_inline_decode(xdr, NFS_fattr_sz << 2); | |
284 | if (unlikely(p == NULL)) | |
285 | goto out_overflow; | |
5f96e5e3 CL |
286 | |
287 | fattr->valid |= NFS_ATTR_FATTR_V2; | |
288 | ||
289 | p = xdr_decode_ftype(p, &type); | |
290 | ||
291 | fattr->mode = be32_to_cpup(p++); | |
292 | fattr->nlink = be32_to_cpup(p++); | |
cfa0898d EB |
293 | fattr->uid = make_kuid(&init_user_ns, be32_to_cpup(p++)); |
294 | if (!uid_valid(fattr->uid)) | |
295 | goto out_uid; | |
296 | fattr->gid = make_kgid(&init_user_ns, be32_to_cpup(p++)); | |
297 | if (!gid_valid(fattr->gid)) | |
298 | goto out_gid; | |
299 | ||
5f96e5e3 CL |
300 | fattr->size = be32_to_cpup(p++); |
301 | fattr->du.nfs2.blocksize = be32_to_cpup(p++); | |
302 | ||
303 | rdev = be32_to_cpup(p++); | |
304 | fattr->rdev = new_decode_dev(rdev); | |
305 | if (type == (u32)NFCHR && rdev == (u32)NFS2_FIFO_DEV) { | |
306 | fattr->mode = (fattr->mode & ~S_IFMT) | S_IFIFO; | |
307 | fattr->rdev = 0; | |
308 | } | |
309 | ||
310 | fattr->du.nfs2.blocks = be32_to_cpup(p++); | |
311 | fattr->fsid.major = be32_to_cpup(p++); | |
312 | fattr->fsid.minor = 0; | |
313 | fattr->fileid = be32_to_cpup(p++); | |
314 | ||
315 | p = xdr_decode_time(p, &fattr->atime); | |
316 | p = xdr_decode_time(p, &fattr->mtime); | |
317 | xdr_decode_time(p, &fattr->ctime); | |
3a1556e8 TM |
318 | fattr->change_attr = nfs_timespec_to_change_attr(&fattr->ctime); |
319 | ||
f796f8b3 | 320 | return 0; |
cfa0898d EB |
321 | out_uid: |
322 | dprintk("NFS: returned invalid uid\n"); | |
323 | return -EINVAL; | |
324 | out_gid: | |
325 | dprintk("NFS: returned invalid gid\n"); | |
326 | return -EINVAL; | |
f796f8b3 CL |
327 | out_overflow: |
328 | print_overflow_msg(__func__, xdr); | |
329 | return -EIO; | |
330 | } | |
331 | ||
25a0866c CL |
332 | /* |
333 | * 2.3.6. sattr | |
334 | * | |
335 | * struct sattr { | |
336 | * unsigned int mode; | |
337 | * unsigned int uid; | |
338 | * unsigned int gid; | |
339 | * unsigned int size; | |
340 | * timeval atime; | |
341 | * timeval mtime; | |
342 | * }; | |
343 | */ | |
344 | ||
345 | #define NFS2_SATTR_NOT_SET (0xffffffff) | |
346 | ||
347 | static __be32 *xdr_time_not_set(__be32 *p) | |
348 | { | |
349 | *p++ = cpu_to_be32(NFS2_SATTR_NOT_SET); | |
350 | *p++ = cpu_to_be32(NFS2_SATTR_NOT_SET); | |
351 | return p; | |
352 | } | |
353 | ||
354 | static void encode_sattr(struct xdr_stream *xdr, const struct iattr *attr) | |
355 | { | |
356 | __be32 *p; | |
357 | ||
358 | p = xdr_reserve_space(xdr, NFS_sattr_sz << 2); | |
359 | ||
360 | if (attr->ia_valid & ATTR_MODE) | |
361 | *p++ = cpu_to_be32(attr->ia_mode); | |
362 | else | |
363 | *p++ = cpu_to_be32(NFS2_SATTR_NOT_SET); | |
364 | if (attr->ia_valid & ATTR_UID) | |
cfa0898d | 365 | *p++ = cpu_to_be32(from_kuid(&init_user_ns, attr->ia_uid)); |
25a0866c CL |
366 | else |
367 | *p++ = cpu_to_be32(NFS2_SATTR_NOT_SET); | |
368 | if (attr->ia_valid & ATTR_GID) | |
cfa0898d | 369 | *p++ = cpu_to_be32(from_kgid(&init_user_ns, attr->ia_gid)); |
25a0866c CL |
370 | else |
371 | *p++ = cpu_to_be32(NFS2_SATTR_NOT_SET); | |
372 | if (attr->ia_valid & ATTR_SIZE) | |
373 | *p++ = cpu_to_be32((u32)attr->ia_size); | |
374 | else | |
375 | *p++ = cpu_to_be32(NFS2_SATTR_NOT_SET); | |
376 | ||
377 | if (attr->ia_valid & ATTR_ATIME_SET) | |
378 | p = xdr_encode_time(p, &attr->ia_atime); | |
379 | else if (attr->ia_valid & ATTR_ATIME) | |
380 | p = xdr_encode_current_server_time(p, &attr->ia_atime); | |
381 | else | |
382 | p = xdr_time_not_set(p); | |
383 | if (attr->ia_valid & ATTR_MTIME_SET) | |
384 | xdr_encode_time(p, &attr->ia_mtime); | |
385 | else if (attr->ia_valid & ATTR_MTIME) | |
386 | xdr_encode_current_server_time(p, &attr->ia_mtime); | |
387 | else | |
388 | xdr_time_not_set(p); | |
389 | } | |
390 | ||
391 | /* | |
392 | * 2.3.7. filename | |
393 | * | |
394 | * typedef string filename<MAXNAMLEN>; | |
395 | */ | |
396 | static void encode_filename(struct xdr_stream *xdr, | |
397 | const char *name, u32 length) | |
398 | { | |
399 | __be32 *p; | |
400 | ||
7fc38846 | 401 | WARN_ON_ONCE(length > NFS2_MAXNAMLEN); |
25a0866c CL |
402 | p = xdr_reserve_space(xdr, 4 + length); |
403 | xdr_encode_opaque(p, name, length); | |
404 | } | |
405 | ||
f796f8b3 CL |
406 | static int decode_filename_inline(struct xdr_stream *xdr, |
407 | const char **name, u32 *length) | |
408 | { | |
409 | __be32 *p; | |
410 | u32 count; | |
411 | ||
412 | p = xdr_inline_decode(xdr, 4); | |
413 | if (unlikely(p == NULL)) | |
414 | goto out_overflow; | |
415 | count = be32_to_cpup(p); | |
416 | if (count > NFS3_MAXNAMLEN) | |
417 | goto out_nametoolong; | |
418 | p = xdr_inline_decode(xdr, count); | |
419 | if (unlikely(p == NULL)) | |
420 | goto out_overflow; | |
421 | *name = (const char *)p; | |
422 | *length = count; | |
423 | return 0; | |
424 | out_nametoolong: | |
425 | dprintk("NFS: returned filename too long: %u\n", count); | |
426 | return -ENAMETOOLONG; | |
427 | out_overflow: | |
428 | print_overflow_msg(__func__, xdr); | |
429 | return -EIO; | |
430 | } | |
431 | ||
25a0866c CL |
432 | /* |
433 | * 2.3.8. path | |
434 | * | |
435 | * typedef string path<MAXPATHLEN>; | |
436 | */ | |
437 | static void encode_path(struct xdr_stream *xdr, struct page **pages, u32 length) | |
438 | { | |
439 | __be32 *p; | |
440 | ||
25a0866c CL |
441 | p = xdr_reserve_space(xdr, 4); |
442 | *p = cpu_to_be32(length); | |
443 | xdr_write_pages(xdr, pages, 0, length); | |
444 | } | |
445 | ||
f796f8b3 CL |
446 | static int decode_path(struct xdr_stream *xdr) |
447 | { | |
448 | u32 length, recvd; | |
f796f8b3 CL |
449 | __be32 *p; |
450 | ||
451 | p = xdr_inline_decode(xdr, 4); | |
452 | if (unlikely(p == NULL)) | |
453 | goto out_overflow; | |
454 | length = be32_to_cpup(p); | |
455 | if (unlikely(length >= xdr->buf->page_len || length > NFS_MAXPATHLEN)) | |
456 | goto out_size; | |
64bd577e | 457 | recvd = xdr_read_pages(xdr, length); |
f796f8b3 CL |
458 | if (unlikely(length > recvd)) |
459 | goto out_cheating; | |
f796f8b3 CL |
460 | xdr_terminate_string(xdr->buf, length); |
461 | return 0; | |
462 | out_size: | |
463 | dprintk("NFS: returned pathname too long: %u\n", length); | |
464 | return -ENAMETOOLONG; | |
465 | out_cheating: | |
466 | dprintk("NFS: server cheating in pathname result: " | |
467 | "length %u > received %u\n", length, recvd); | |
468 | return -EIO; | |
469 | out_overflow: | |
470 | print_overflow_msg(__func__, xdr); | |
471 | return -EIO; | |
472 | } | |
473 | ||
474 | /* | |
475 | * 2.3.9. attrstat | |
476 | * | |
477 | * union attrstat switch (stat status) { | |
478 | * case NFS_OK: | |
479 | * fattr attributes; | |
480 | * default: | |
481 | * void; | |
482 | * }; | |
483 | */ | |
484 | static int decode_attrstat(struct xdr_stream *xdr, struct nfs_fattr *result) | |
485 | { | |
486 | enum nfs_stat status; | |
487 | int error; | |
488 | ||
489 | error = decode_stat(xdr, &status); | |
490 | if (unlikely(error)) | |
491 | goto out; | |
492 | if (status != NFS_OK) | |
493 | goto out_default; | |
494 | error = decode_fattr(xdr, result); | |
495 | out: | |
496 | return error; | |
497 | out_default: | |
498 | return nfs_stat_to_errno(status); | |
499 | } | |
500 | ||
25a0866c CL |
501 | /* |
502 | * 2.3.10. diropargs | |
503 | * | |
504 | * struct diropargs { | |
505 | * fhandle dir; | |
506 | * filename name; | |
507 | * }; | |
508 | */ | |
509 | static void encode_diropargs(struct xdr_stream *xdr, const struct nfs_fh *fh, | |
510 | const char *name, u32 length) | |
511 | { | |
512 | encode_fhandle(xdr, fh); | |
513 | encode_filename(xdr, name, length); | |
514 | } | |
515 | ||
f796f8b3 CL |
516 | /* |
517 | * 2.3.11. diropres | |
518 | * | |
519 | * union diropres switch (stat status) { | |
520 | * case NFS_OK: | |
521 | * struct { | |
522 | * fhandle file; | |
523 | * fattr attributes; | |
524 | * } diropok; | |
525 | * default: | |
526 | * void; | |
527 | * }; | |
528 | */ | |
529 | static int decode_diropok(struct xdr_stream *xdr, struct nfs_diropok *result) | |
530 | { | |
531 | int error; | |
532 | ||
533 | error = decode_fhandle(xdr, result->fh); | |
534 | if (unlikely(error)) | |
535 | goto out; | |
536 | error = decode_fattr(xdr, result->fattr); | |
537 | out: | |
538 | return error; | |
539 | } | |
540 | ||
541 | static int decode_diropres(struct xdr_stream *xdr, struct nfs_diropok *result) | |
542 | { | |
543 | enum nfs_stat status; | |
544 | int error; | |
545 | ||
546 | error = decode_stat(xdr, &status); | |
547 | if (unlikely(error)) | |
548 | goto out; | |
549 | if (status != NFS_OK) | |
550 | goto out_default; | |
551 | error = decode_diropok(xdr, result); | |
552 | out: | |
553 | return error; | |
554 | out_default: | |
555 | return nfs_stat_to_errno(status); | |
556 | } | |
557 | ||
25a0866c | 558 | |
1da177e4 | 559 | /* |
2d70f533 CL |
560 | * NFSv2 XDR encode functions |
561 | * | |
562 | * NFSv2 argument types are defined in section 2.2 of RFC 1094: | |
563 | * "NFS: Network File System Protocol Specification". | |
1da177e4 | 564 | */ |
1da177e4 | 565 | |
9f06c719 CL |
566 | static void nfs2_xdr_enc_fhandle(struct rpc_rqst *req, |
567 | struct xdr_stream *xdr, | |
568 | const struct nfs_fh *fh) | |
25a0866c | 569 | { |
9f06c719 | 570 | encode_fhandle(xdr, fh); |
25a0866c CL |
571 | } |
572 | ||
25a0866c CL |
573 | /* |
574 | * 2.2.3. sattrargs | |
575 | * | |
576 | * struct sattrargs { | |
577 | * fhandle file; | |
578 | * sattr attributes; | |
579 | * }; | |
580 | */ | |
9f06c719 CL |
581 | static void nfs2_xdr_enc_sattrargs(struct rpc_rqst *req, |
582 | struct xdr_stream *xdr, | |
583 | const struct nfs_sattrargs *args) | |
25a0866c | 584 | { |
9f06c719 CL |
585 | encode_fhandle(xdr, args->fh); |
586 | encode_sattr(xdr, args->sattr); | |
25a0866c CL |
587 | } |
588 | ||
9f06c719 CL |
589 | static void nfs2_xdr_enc_diropargs(struct rpc_rqst *req, |
590 | struct xdr_stream *xdr, | |
591 | const struct nfs_diropargs *args) | |
25a0866c | 592 | { |
9f06c719 | 593 | encode_diropargs(xdr, args->fh, args->name, args->len); |
25a0866c CL |
594 | } |
595 | ||
9f06c719 CL |
596 | static void nfs2_xdr_enc_readlinkargs(struct rpc_rqst *req, |
597 | struct xdr_stream *xdr, | |
598 | const struct nfs_readlinkargs *args) | |
25a0866c | 599 | { |
9f06c719 | 600 | encode_fhandle(xdr, args->fh); |
25a0866c CL |
601 | prepare_reply_buffer(req, args->pages, args->pgbase, |
602 | args->pglen, NFS_readlinkres_sz); | |
25a0866c CL |
603 | } |
604 | ||
25a0866c CL |
605 | /* |
606 | * 2.2.7. readargs | |
607 | * | |
608 | * struct readargs { | |
609 | * fhandle file; | |
610 | * unsigned offset; | |
611 | * unsigned count; | |
612 | * unsigned totalcount; | |
613 | * }; | |
614 | */ | |
615 | static void encode_readargs(struct xdr_stream *xdr, | |
616 | const struct nfs_readargs *args) | |
617 | { | |
618 | u32 offset = args->offset; | |
619 | u32 count = args->count; | |
620 | __be32 *p; | |
621 | ||
622 | encode_fhandle(xdr, args->fh); | |
623 | ||
624 | p = xdr_reserve_space(xdr, 4 + 4 + 4); | |
625 | *p++ = cpu_to_be32(offset); | |
626 | *p++ = cpu_to_be32(count); | |
627 | *p = cpu_to_be32(count); | |
628 | } | |
629 | ||
9f06c719 CL |
630 | static void nfs2_xdr_enc_readargs(struct rpc_rqst *req, |
631 | struct xdr_stream *xdr, | |
632 | const struct nfs_readargs *args) | |
25a0866c | 633 | { |
9f06c719 | 634 | encode_readargs(xdr, args); |
25a0866c CL |
635 | prepare_reply_buffer(req, args->pages, args->pgbase, |
636 | args->count, NFS_readres_sz); | |
637 | req->rq_rcv_buf.flags |= XDRBUF_READ; | |
25a0866c CL |
638 | } |
639 | ||
25a0866c CL |
640 | /* |
641 | * 2.2.9. writeargs | |
642 | * | |
643 | * struct writeargs { | |
644 | * fhandle file; | |
645 | * unsigned beginoffset; | |
646 | * unsigned offset; | |
647 | * unsigned totalcount; | |
648 | * nfsdata data; | |
649 | * }; | |
650 | */ | |
651 | static void encode_writeargs(struct xdr_stream *xdr, | |
652 | const struct nfs_writeargs *args) | |
653 | { | |
654 | u32 offset = args->offset; | |
655 | u32 count = args->count; | |
656 | __be32 *p; | |
657 | ||
658 | encode_fhandle(xdr, args->fh); | |
659 | ||
660 | p = xdr_reserve_space(xdr, 4 + 4 + 4 + 4); | |
661 | *p++ = cpu_to_be32(offset); | |
662 | *p++ = cpu_to_be32(offset); | |
663 | *p++ = cpu_to_be32(count); | |
664 | ||
665 | /* nfsdata */ | |
666 | *p = cpu_to_be32(count); | |
667 | xdr_write_pages(xdr, args->pages, args->pgbase, count); | |
668 | } | |
669 | ||
9f06c719 CL |
670 | static void nfs2_xdr_enc_writeargs(struct rpc_rqst *req, |
671 | struct xdr_stream *xdr, | |
672 | const struct nfs_writeargs *args) | |
25a0866c | 673 | { |
9f06c719 CL |
674 | encode_writeargs(xdr, args); |
675 | xdr->buf->flags |= XDRBUF_WRITE; | |
25a0866c CL |
676 | } |
677 | ||
25a0866c CL |
678 | /* |
679 | * 2.2.10. createargs | |
680 | * | |
681 | * struct createargs { | |
682 | * diropargs where; | |
683 | * sattr attributes; | |
684 | * }; | |
685 | */ | |
9f06c719 CL |
686 | static void nfs2_xdr_enc_createargs(struct rpc_rqst *req, |
687 | struct xdr_stream *xdr, | |
688 | const struct nfs_createargs *args) | |
25a0866c | 689 | { |
9f06c719 CL |
690 | encode_diropargs(xdr, args->fh, args->name, args->len); |
691 | encode_sattr(xdr, args->sattr); | |
25a0866c CL |
692 | } |
693 | ||
9f06c719 CL |
694 | static void nfs2_xdr_enc_removeargs(struct rpc_rqst *req, |
695 | struct xdr_stream *xdr, | |
696 | const struct nfs_removeargs *args) | |
25a0866c | 697 | { |
9f06c719 | 698 | encode_diropargs(xdr, args->fh, args->name.name, args->name.len); |
25a0866c CL |
699 | } |
700 | ||
25a0866c CL |
701 | /* |
702 | * 2.2.12. renameargs | |
703 | * | |
704 | * struct renameargs { | |
705 | * diropargs from; | |
706 | * diropargs to; | |
707 | * }; | |
708 | */ | |
9f06c719 CL |
709 | static void nfs2_xdr_enc_renameargs(struct rpc_rqst *req, |
710 | struct xdr_stream *xdr, | |
711 | const struct nfs_renameargs *args) | |
25a0866c CL |
712 | { |
713 | const struct qstr *old = args->old_name; | |
714 | const struct qstr *new = args->new_name; | |
25a0866c | 715 | |
9f06c719 CL |
716 | encode_diropargs(xdr, args->old_dir, old->name, old->len); |
717 | encode_diropargs(xdr, args->new_dir, new->name, new->len); | |
25a0866c CL |
718 | } |
719 | ||
25a0866c CL |
720 | /* |
721 | * 2.2.13. linkargs | |
722 | * | |
723 | * struct linkargs { | |
724 | * fhandle from; | |
725 | * diropargs to; | |
726 | * }; | |
727 | */ | |
9f06c719 CL |
728 | static void nfs2_xdr_enc_linkargs(struct rpc_rqst *req, |
729 | struct xdr_stream *xdr, | |
730 | const struct nfs_linkargs *args) | |
25a0866c | 731 | { |
9f06c719 CL |
732 | encode_fhandle(xdr, args->fromfh); |
733 | encode_diropargs(xdr, args->tofh, args->toname, args->tolen); | |
25a0866c CL |
734 | } |
735 | ||
25a0866c CL |
736 | /* |
737 | * 2.2.14. symlinkargs | |
738 | * | |
739 | * struct symlinkargs { | |
740 | * diropargs from; | |
741 | * path to; | |
742 | * sattr attributes; | |
743 | * }; | |
744 | */ | |
9f06c719 CL |
745 | static void nfs2_xdr_enc_symlinkargs(struct rpc_rqst *req, |
746 | struct xdr_stream *xdr, | |
747 | const struct nfs_symlinkargs *args) | |
25a0866c | 748 | { |
9f06c719 CL |
749 | encode_diropargs(xdr, args->fromfh, args->fromname, args->fromlen); |
750 | encode_path(xdr, args->pages, args->pathlen); | |
751 | encode_sattr(xdr, args->sattr); | |
25a0866c CL |
752 | } |
753 | ||
25a0866c CL |
754 | /* |
755 | * 2.2.17. readdirargs | |
756 | * | |
757 | * struct readdirargs { | |
758 | * fhandle dir; | |
759 | * nfscookie cookie; | |
760 | * unsigned count; | |
761 | * }; | |
762 | */ | |
763 | static void encode_readdirargs(struct xdr_stream *xdr, | |
764 | const struct nfs_readdirargs *args) | |
765 | { | |
766 | __be32 *p; | |
767 | ||
768 | encode_fhandle(xdr, args->fh); | |
769 | ||
770 | p = xdr_reserve_space(xdr, 4 + 4); | |
771 | *p++ = cpu_to_be32(args->cookie); | |
772 | *p = cpu_to_be32(args->count); | |
773 | } | |
774 | ||
9f06c719 CL |
775 | static void nfs2_xdr_enc_readdirargs(struct rpc_rqst *req, |
776 | struct xdr_stream *xdr, | |
777 | const struct nfs_readdirargs *args) | |
25a0866c | 778 | { |
9f06c719 | 779 | encode_readdirargs(xdr, args); |
25a0866c CL |
780 | prepare_reply_buffer(req, args->pages, 0, |
781 | args->count, NFS_readdirres_sz); | |
25a0866c CL |
782 | } |
783 | ||
1da177e4 | 784 | /* |
661ad423 CL |
785 | * NFSv2 XDR decode functions |
786 | * | |
787 | * NFSv2 result types are defined in section 2.2 of RFC 1094: | |
788 | * "NFS: Network File System Protocol Specification". | |
1da177e4 | 789 | */ |
1da177e4 | 790 | |
bf269551 | 791 | static int nfs2_xdr_dec_stat(struct rpc_rqst *req, struct xdr_stream *xdr, |
f796f8b3 CL |
792 | void *__unused) |
793 | { | |
f796f8b3 CL |
794 | enum nfs_stat status; |
795 | int error; | |
796 | ||
bf269551 | 797 | error = decode_stat(xdr, &status); |
f796f8b3 CL |
798 | if (unlikely(error)) |
799 | goto out; | |
800 | if (status != NFS_OK) | |
801 | goto out_default; | |
802 | out: | |
803 | return error; | |
804 | out_default: | |
805 | return nfs_stat_to_errno(status); | |
806 | } | |
807 | ||
bf269551 | 808 | static int nfs2_xdr_dec_attrstat(struct rpc_rqst *req, struct xdr_stream *xdr, |
f796f8b3 CL |
809 | struct nfs_fattr *result) |
810 | { | |
bf269551 | 811 | return decode_attrstat(xdr, result); |
f796f8b3 CL |
812 | } |
813 | ||
bf269551 | 814 | static int nfs2_xdr_dec_diropres(struct rpc_rqst *req, struct xdr_stream *xdr, |
f796f8b3 CL |
815 | struct nfs_diropok *result) |
816 | { | |
bf269551 | 817 | return decode_diropres(xdr, result); |
f796f8b3 CL |
818 | } |
819 | ||
f796f8b3 CL |
820 | /* |
821 | * 2.2.6. readlinkres | |
822 | * | |
823 | * union readlinkres switch (stat status) { | |
824 | * case NFS_OK: | |
825 | * path data; | |
826 | * default: | |
827 | * void; | |
828 | * }; | |
829 | */ | |
bf269551 CL |
830 | static int nfs2_xdr_dec_readlinkres(struct rpc_rqst *req, |
831 | struct xdr_stream *xdr, void *__unused) | |
f796f8b3 | 832 | { |
f796f8b3 CL |
833 | enum nfs_stat status; |
834 | int error; | |
835 | ||
bf269551 | 836 | error = decode_stat(xdr, &status); |
f796f8b3 CL |
837 | if (unlikely(error)) |
838 | goto out; | |
839 | if (status != NFS_OK) | |
840 | goto out_default; | |
bf269551 | 841 | error = decode_path(xdr); |
f796f8b3 CL |
842 | out: |
843 | return error; | |
844 | out_default: | |
845 | return nfs_stat_to_errno(status); | |
846 | } | |
847 | ||
848 | /* | |
849 | * 2.2.7. readres | |
850 | * | |
851 | * union readres switch (stat status) { | |
852 | * case NFS_OK: | |
853 | * fattr attributes; | |
854 | * nfsdata data; | |
855 | * default: | |
856 | * void; | |
857 | * }; | |
858 | */ | |
bf269551 | 859 | static int nfs2_xdr_dec_readres(struct rpc_rqst *req, struct xdr_stream *xdr, |
f796f8b3 CL |
860 | struct nfs_readres *result) |
861 | { | |
f796f8b3 CL |
862 | enum nfs_stat status; |
863 | int error; | |
864 | ||
bf269551 | 865 | error = decode_stat(xdr, &status); |
f796f8b3 CL |
866 | if (unlikely(error)) |
867 | goto out; | |
868 | if (status != NFS_OK) | |
869 | goto out_default; | |
bf269551 | 870 | error = decode_fattr(xdr, result->fattr); |
f796f8b3 CL |
871 | if (unlikely(error)) |
872 | goto out; | |
bf269551 | 873 | error = decode_nfsdata(xdr, result); |
f796f8b3 CL |
874 | out: |
875 | return error; | |
876 | out_default: | |
877 | return nfs_stat_to_errno(status); | |
878 | } | |
879 | ||
bf269551 | 880 | static int nfs2_xdr_dec_writeres(struct rpc_rqst *req, struct xdr_stream *xdr, |
f796f8b3 CL |
881 | struct nfs_writeres *result) |
882 | { | |
f796f8b3 CL |
883 | /* All NFSv2 writes are "file sync" writes */ |
884 | result->verf->committed = NFS_FILE_SYNC; | |
bf269551 | 885 | return decode_attrstat(xdr, result->fattr); |
f796f8b3 CL |
886 | } |
887 | ||
888 | /** | |
889 | * nfs2_decode_dirent - Decode a single NFSv2 directory entry stored in | |
890 | * the local page cache. | |
891 | * @xdr: XDR stream where entry resides | |
892 | * @entry: buffer to fill in with entry data | |
f796f8b3 CL |
893 | * @plus: boolean indicating whether this should be a readdirplus entry |
894 | * | |
573c4e1e CL |
895 | * Returns zero if successful, otherwise a negative errno value is |
896 | * returned. | |
f796f8b3 CL |
897 | * |
898 | * This function is not invoked during READDIR reply decoding, but | |
899 | * rather whenever an application invokes the getdents(2) system call | |
900 | * on a directory already in our cache. | |
901 | * | |
902 | * 2.2.17. entry | |
903 | * | |
904 | * struct entry { | |
905 | * unsigned fileid; | |
906 | * filename name; | |
907 | * nfscookie cookie; | |
908 | * entry *nextentry; | |
909 | * }; | |
910 | */ | |
573c4e1e CL |
911 | int nfs2_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, |
912 | int plus) | |
f796f8b3 CL |
913 | { |
914 | __be32 *p; | |
915 | int error; | |
916 | ||
917 | p = xdr_inline_decode(xdr, 4); | |
918 | if (unlikely(p == NULL)) | |
919 | goto out_overflow; | |
920 | if (*p++ == xdr_zero) { | |
921 | p = xdr_inline_decode(xdr, 4); | |
922 | if (unlikely(p == NULL)) | |
923 | goto out_overflow; | |
924 | if (*p++ == xdr_zero) | |
573c4e1e | 925 | return -EAGAIN; |
f796f8b3 | 926 | entry->eof = 1; |
573c4e1e | 927 | return -EBADCOOKIE; |
f796f8b3 CL |
928 | } |
929 | ||
930 | p = xdr_inline_decode(xdr, 4); | |
931 | if (unlikely(p == NULL)) | |
932 | goto out_overflow; | |
933 | entry->ino = be32_to_cpup(p); | |
934 | ||
935 | error = decode_filename_inline(xdr, &entry->name, &entry->len); | |
936 | if (unlikely(error)) | |
573c4e1e | 937 | return error; |
f796f8b3 CL |
938 | |
939 | /* | |
940 | * The type (size and byte order) of nfscookie isn't defined in | |
941 | * RFC 1094. This implementation assumes that it's an XDR uint32. | |
942 | */ | |
943 | entry->prev_cookie = entry->cookie; | |
944 | p = xdr_inline_decode(xdr, 4); | |
945 | if (unlikely(p == NULL)) | |
946 | goto out_overflow; | |
947 | entry->cookie = be32_to_cpup(p); | |
948 | ||
949 | entry->d_type = DT_UNKNOWN; | |
950 | ||
573c4e1e | 951 | return 0; |
f796f8b3 CL |
952 | |
953 | out_overflow: | |
954 | print_overflow_msg(__func__, xdr); | |
573c4e1e | 955 | return -EAGAIN; |
f796f8b3 CL |
956 | } |
957 | ||
958 | /* | |
959 | * 2.2.17. readdirres | |
960 | * | |
961 | * union readdirres switch (stat status) { | |
962 | * case NFS_OK: | |
963 | * struct { | |
964 | * entry *entries; | |
965 | * bool eof; | |
966 | * } readdirok; | |
967 | * default: | |
968 | * void; | |
969 | * }; | |
970 | * | |
971 | * Read the directory contents into the page cache, but don't | |
972 | * touch them. The actual decoding is done by nfs2_decode_dirent() | |
973 | * during subsequent nfs_readdir() calls. | |
974 | */ | |
975 | static int decode_readdirok(struct xdr_stream *xdr) | |
976 | { | |
64bd577e | 977 | return xdr_read_pages(xdr, xdr->buf->page_len); |
f796f8b3 CL |
978 | } |
979 | ||
bf269551 CL |
980 | static int nfs2_xdr_dec_readdirres(struct rpc_rqst *req, |
981 | struct xdr_stream *xdr, void *__unused) | |
f796f8b3 | 982 | { |
f796f8b3 CL |
983 | enum nfs_stat status; |
984 | int error; | |
985 | ||
bf269551 | 986 | error = decode_stat(xdr, &status); |
f796f8b3 CL |
987 | if (unlikely(error)) |
988 | goto out; | |
989 | if (status != NFS_OK) | |
990 | goto out_default; | |
bf269551 | 991 | error = decode_readdirok(xdr); |
f796f8b3 CL |
992 | out: |
993 | return error; | |
994 | out_default: | |
995 | return nfs_stat_to_errno(status); | |
996 | } | |
997 | ||
f796f8b3 CL |
998 | /* |
999 | * 2.2.18. statfsres | |
1000 | * | |
1001 | * union statfsres (stat status) { | |
1002 | * case NFS_OK: | |
1003 | * struct { | |
1004 | * unsigned tsize; | |
1005 | * unsigned bsize; | |
1006 | * unsigned blocks; | |
1007 | * unsigned bfree; | |
1008 | * unsigned bavail; | |
1009 | * } info; | |
1010 | * default: | |
1011 | * void; | |
1012 | * }; | |
1013 | */ | |
1014 | static int decode_info(struct xdr_stream *xdr, struct nfs2_fsstat *result) | |
1015 | { | |
1016 | __be32 *p; | |
1017 | ||
1018 | p = xdr_inline_decode(xdr, NFS_info_sz << 2); | |
1019 | if (unlikely(p == NULL)) | |
1020 | goto out_overflow; | |
1021 | result->tsize = be32_to_cpup(p++); | |
1022 | result->bsize = be32_to_cpup(p++); | |
1023 | result->blocks = be32_to_cpup(p++); | |
1024 | result->bfree = be32_to_cpup(p++); | |
1025 | result->bavail = be32_to_cpup(p); | |
1026 | return 0; | |
1027 | out_overflow: | |
1028 | print_overflow_msg(__func__, xdr); | |
1029 | return -EIO; | |
1030 | } | |
1031 | ||
bf269551 | 1032 | static int nfs2_xdr_dec_statfsres(struct rpc_rqst *req, struct xdr_stream *xdr, |
f796f8b3 CL |
1033 | struct nfs2_fsstat *result) |
1034 | { | |
f796f8b3 CL |
1035 | enum nfs_stat status; |
1036 | int error; | |
1037 | ||
bf269551 | 1038 | error = decode_stat(xdr, &status); |
f796f8b3 CL |
1039 | if (unlikely(error)) |
1040 | goto out; | |
1041 | if (status != NFS_OK) | |
1042 | goto out_default; | |
bf269551 | 1043 | error = decode_info(xdr, result); |
f796f8b3 CL |
1044 | out: |
1045 | return error; | |
1046 | out_default: | |
1047 | return nfs_stat_to_errno(status); | |
1048 | } | |
1049 | ||
1050 | ||
1da177e4 LT |
1051 | /* |
1052 | * We need to translate between nfs status return values and | |
1053 | * the local errno values which may not be the same. | |
1054 | */ | |
85828493 | 1055 | static const struct { |
1da177e4 LT |
1056 | int stat; |
1057 | int errno; | |
1058 | } nfs_errtbl[] = { | |
1059 | { NFS_OK, 0 }, | |
856dff3d BH |
1060 | { NFSERR_PERM, -EPERM }, |
1061 | { NFSERR_NOENT, -ENOENT }, | |
1062 | { NFSERR_IO, -errno_NFSERR_IO}, | |
1063 | { NFSERR_NXIO, -ENXIO }, | |
1064 | /* { NFSERR_EAGAIN, -EAGAIN }, */ | |
1065 | { NFSERR_ACCES, -EACCES }, | |
1066 | { NFSERR_EXIST, -EEXIST }, | |
1067 | { NFSERR_XDEV, -EXDEV }, | |
1068 | { NFSERR_NODEV, -ENODEV }, | |
1069 | { NFSERR_NOTDIR, -ENOTDIR }, | |
1070 | { NFSERR_ISDIR, -EISDIR }, | |
1071 | { NFSERR_INVAL, -EINVAL }, | |
1072 | { NFSERR_FBIG, -EFBIG }, | |
1073 | { NFSERR_NOSPC, -ENOSPC }, | |
1074 | { NFSERR_ROFS, -EROFS }, | |
1075 | { NFSERR_MLINK, -EMLINK }, | |
1076 | { NFSERR_NAMETOOLONG, -ENAMETOOLONG }, | |
1077 | { NFSERR_NOTEMPTY, -ENOTEMPTY }, | |
1078 | { NFSERR_DQUOT, -EDQUOT }, | |
1079 | { NFSERR_STALE, -ESTALE }, | |
1080 | { NFSERR_REMOTE, -EREMOTE }, | |
1da177e4 | 1081 | #ifdef EWFLUSH |
856dff3d | 1082 | { NFSERR_WFLUSH, -EWFLUSH }, |
1da177e4 | 1083 | #endif |
856dff3d BH |
1084 | { NFSERR_BADHANDLE, -EBADHANDLE }, |
1085 | { NFSERR_NOT_SYNC, -ENOTSYNC }, | |
1086 | { NFSERR_BAD_COOKIE, -EBADCOOKIE }, | |
1087 | { NFSERR_NOTSUPP, -ENOTSUPP }, | |
1088 | { NFSERR_TOOSMALL, -ETOOSMALL }, | |
fdcb4577 | 1089 | { NFSERR_SERVERFAULT, -EREMOTEIO }, |
856dff3d BH |
1090 | { NFSERR_BADTYPE, -EBADTYPE }, |
1091 | { NFSERR_JUKEBOX, -EJUKEBOX }, | |
1092 | { -1, -EIO } | |
1da177e4 LT |
1093 | }; |
1094 | ||
85828493 CL |
1095 | /** |
1096 | * nfs_stat_to_errno - convert an NFS status code to a local errno | |
1097 | * @status: NFS status code to convert | |
1098 | * | |
1099 | * Returns a local errno value, or -EIO if the NFS status code is | |
1100 | * not recognized. This function is used jointly by NFSv2 and NFSv3. | |
1da177e4 | 1101 | */ |
5e7e5a0d | 1102 | static int nfs_stat_to_errno(enum nfs_stat status) |
1da177e4 LT |
1103 | { |
1104 | int i; | |
1105 | ||
1106 | for (i = 0; nfs_errtbl[i].stat != -1; i++) { | |
85828493 | 1107 | if (nfs_errtbl[i].stat == (int)status) |
1da177e4 LT |
1108 | return nfs_errtbl[i].errno; |
1109 | } | |
85828493 | 1110 | dprintk("NFS: Unrecognized nfs status value: %u\n", status); |
1da177e4 LT |
1111 | return nfs_errtbl[i].errno; |
1112 | } | |
1113 | ||
1da177e4 LT |
1114 | #define PROC(proc, argtype, restype, timer) \ |
1115 | [NFSPROC_##proc] = { \ | |
1116 | .p_proc = NFSPROC_##proc, \ | |
9f06c719 | 1117 | .p_encode = (kxdreproc_t)nfs2_xdr_enc_##argtype, \ |
bf269551 | 1118 | .p_decode = (kxdrdproc_t)nfs2_xdr_dec_##restype, \ |
2bea90d4 CL |
1119 | .p_arglen = NFS_##argtype##_sz, \ |
1120 | .p_replen = NFS_##restype##_sz, \ | |
cc0175c1 CL |
1121 | .p_timer = timer, \ |
1122 | .p_statidx = NFSPROC_##proc, \ | |
1123 | .p_name = #proc, \ | |
1da177e4 LT |
1124 | } |
1125 | struct rpc_procinfo nfs_procedures[] = { | |
7d93bd71 CL |
1126 | PROC(GETATTR, fhandle, attrstat, 1), |
1127 | PROC(SETATTR, sattrargs, attrstat, 0), | |
1128 | PROC(LOOKUP, diropargs, diropres, 2), | |
1129 | PROC(READLINK, readlinkargs, readlinkres, 3), | |
1130 | PROC(READ, readargs, readres, 3), | |
1131 | PROC(WRITE, writeargs, writeres, 4), | |
1132 | PROC(CREATE, createargs, diropres, 0), | |
1133 | PROC(REMOVE, removeargs, stat, 0), | |
1134 | PROC(RENAME, renameargs, stat, 0), | |
1135 | PROC(LINK, linkargs, stat, 0), | |
1136 | PROC(SYMLINK, symlinkargs, stat, 0), | |
1137 | PROC(MKDIR, createargs, diropres, 0), | |
1138 | PROC(RMDIR, diropargs, stat, 0), | |
1139 | PROC(READDIR, readdirargs, readdirres, 3), | |
1140 | PROC(STATFS, fhandle, statfsres, 0), | |
1da177e4 LT |
1141 | }; |
1142 | ||
a613fa16 | 1143 | const struct rpc_version nfs_version2 = { |
1da177e4 | 1144 | .number = 2, |
e8c96f8c | 1145 | .nrprocs = ARRAY_SIZE(nfs_procedures), |
1da177e4 LT |
1146 | .procs = nfs_procedures |
1147 | }; |