Commit | Line | Data |
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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; | |
109 | size_t hdrlen; | |
110 | __be32 *p; | |
111 | ||
112 | p = xdr_inline_decode(xdr, 4); | |
113 | if (unlikely(p == NULL)) | |
114 | goto out_overflow; | |
115 | count = be32_to_cpup(p); | |
116 | hdrlen = (u8 *)xdr->p - (u8 *)xdr->iov->iov_base; | |
117 | recvd = xdr->buf->len - hdrlen; | |
118 | if (unlikely(count > recvd)) | |
119 | goto out_cheating; | |
120 | out: | |
121 | xdr_read_pages(xdr, count); | |
122 | result->eof = 0; /* NFSv2 does not pass EOF flag on the wire. */ | |
123 | result->count = count; | |
124 | return count; | |
125 | out_cheating: | |
126 | dprintk("NFS: server cheating in read result: " | |
127 | "count %u > recvd %u\n", count, recvd); | |
128 | count = recvd; | |
129 | goto out; | |
130 | out_overflow: | |
131 | print_overflow_msg(__func__, xdr); | |
132 | return -EIO; | |
133 | } | |
134 | ||
135 | /* | |
136 | * enum stat { | |
137 | * NFS_OK = 0, | |
138 | * NFSERR_PERM = 1, | |
139 | * NFSERR_NOENT = 2, | |
140 | * NFSERR_IO = 5, | |
141 | * NFSERR_NXIO = 6, | |
142 | * NFSERR_ACCES = 13, | |
143 | * NFSERR_EXIST = 17, | |
144 | * NFSERR_NODEV = 19, | |
145 | * NFSERR_NOTDIR = 20, | |
146 | * NFSERR_ISDIR = 21, | |
147 | * NFSERR_FBIG = 27, | |
148 | * NFSERR_NOSPC = 28, | |
149 | * NFSERR_ROFS = 30, | |
150 | * NFSERR_NAMETOOLONG = 63, | |
151 | * NFSERR_NOTEMPTY = 66, | |
152 | * NFSERR_DQUOT = 69, | |
153 | * NFSERR_STALE = 70, | |
154 | * NFSERR_WFLUSH = 99 | |
155 | * }; | |
156 | */ | |
157 | static int decode_stat(struct xdr_stream *xdr, enum nfs_stat *status) | |
158 | { | |
159 | __be32 *p; | |
160 | ||
161 | p = xdr_inline_decode(xdr, 4); | |
162 | if (unlikely(p == NULL)) | |
163 | goto out_overflow; | |
164 | *status = be32_to_cpup(p); | |
165 | return 0; | |
166 | out_overflow: | |
167 | print_overflow_msg(__func__, xdr); | |
168 | return -EIO; | |
169 | } | |
170 | ||
5f96e5e3 CL |
171 | /* |
172 | * 2.3.2. ftype | |
173 | * | |
174 | * enum ftype { | |
175 | * NFNON = 0, | |
176 | * NFREG = 1, | |
177 | * NFDIR = 2, | |
178 | * NFBLK = 3, | |
179 | * NFCHR = 4, | |
180 | * NFLNK = 5 | |
181 | * }; | |
182 | * | |
183 | */ | |
184 | static __be32 *xdr_decode_ftype(__be32 *p, u32 *type) | |
185 | { | |
186 | *type = be32_to_cpup(p++); | |
187 | if (unlikely(*type > NF2FIFO)) | |
188 | *type = NFBAD; | |
189 | return p; | |
190 | } | |
191 | ||
25a0866c CL |
192 | /* |
193 | * 2.3.3. fhandle | |
194 | * | |
195 | * typedef opaque fhandle[FHSIZE]; | |
196 | */ | |
197 | static void encode_fhandle(struct xdr_stream *xdr, const struct nfs_fh *fh) | |
198 | { | |
199 | __be32 *p; | |
200 | ||
201 | BUG_ON(fh->size != NFS2_FHSIZE); | |
202 | p = xdr_reserve_space(xdr, NFS2_FHSIZE); | |
203 | memcpy(p, fh->data, NFS2_FHSIZE); | |
204 | } | |
205 | ||
f796f8b3 CL |
206 | static int decode_fhandle(struct xdr_stream *xdr, struct nfs_fh *fh) |
207 | { | |
208 | __be32 *p; | |
209 | ||
210 | p = xdr_inline_decode(xdr, NFS2_FHSIZE); | |
211 | if (unlikely(p == NULL)) | |
212 | goto out_overflow; | |
213 | fh->size = NFS2_FHSIZE; | |
214 | memcpy(fh->data, p, NFS2_FHSIZE); | |
215 | return 0; | |
216 | out_overflow: | |
217 | print_overflow_msg(__func__, xdr); | |
218 | return -EIO; | |
219 | } | |
220 | ||
282ac2a5 CL |
221 | /* |
222 | * 2.3.4. timeval | |
223 | * | |
224 | * struct timeval { | |
225 | * unsigned int seconds; | |
226 | * unsigned int useconds; | |
227 | * }; | |
228 | */ | |
229 | static __be32 *xdr_encode_time(__be32 *p, const struct timespec *timep) | |
230 | { | |
231 | *p++ = cpu_to_be32(timep->tv_sec); | |
232 | if (timep->tv_nsec != 0) | |
233 | *p++ = cpu_to_be32(timep->tv_nsec / NSEC_PER_USEC); | |
234 | else | |
235 | *p++ = cpu_to_be32(0); | |
236 | return p; | |
237 | } | |
238 | ||
239 | /* | |
240 | * Passing the invalid value useconds=1000000 is a Sun convention for | |
241 | * "set to current server time". It's needed to make permissions checks | |
242 | * for the "touch" program across v2 mounts to Solaris and Irix servers | |
243 | * work correctly. See description of sattr in section 6.1 of "NFS | |
244 | * Illustrated" by Brent Callaghan, Addison-Wesley, ISBN 0-201-32750-5. | |
245 | */ | |
246 | static __be32 *xdr_encode_current_server_time(__be32 *p, | |
247 | const struct timespec *timep) | |
248 | { | |
249 | *p++ = cpu_to_be32(timep->tv_sec); | |
250 | *p++ = cpu_to_be32(1000000); | |
251 | return p; | |
252 | } | |
253 | ||
5f96e5e3 CL |
254 | static __be32 *xdr_decode_time(__be32 *p, struct timespec *timep) |
255 | { | |
256 | timep->tv_sec = be32_to_cpup(p++); | |
257 | timep->tv_nsec = be32_to_cpup(p++) * NSEC_PER_USEC; | |
258 | return p; | |
259 | } | |
260 | ||
f796f8b3 CL |
261 | /* |
262 | * 2.3.5. fattr | |
263 | * | |
264 | * struct fattr { | |
265 | * ftype type; | |
266 | * unsigned int mode; | |
267 | * unsigned int nlink; | |
268 | * unsigned int uid; | |
269 | * unsigned int gid; | |
270 | * unsigned int size; | |
271 | * unsigned int blocksize; | |
272 | * unsigned int rdev; | |
273 | * unsigned int blocks; | |
274 | * unsigned int fsid; | |
275 | * unsigned int fileid; | |
276 | * timeval atime; | |
277 | * timeval mtime; | |
278 | * timeval ctime; | |
279 | * }; | |
280 | * | |
281 | */ | |
282 | static int decode_fattr(struct xdr_stream *xdr, struct nfs_fattr *fattr) | |
283 | { | |
5f96e5e3 | 284 | u32 rdev, type; |
f796f8b3 CL |
285 | __be32 *p; |
286 | ||
287 | p = xdr_inline_decode(xdr, NFS_fattr_sz << 2); | |
288 | if (unlikely(p == NULL)) | |
289 | goto out_overflow; | |
5f96e5e3 CL |
290 | |
291 | fattr->valid |= NFS_ATTR_FATTR_V2; | |
292 | ||
293 | p = xdr_decode_ftype(p, &type); | |
294 | ||
295 | fattr->mode = be32_to_cpup(p++); | |
296 | fattr->nlink = be32_to_cpup(p++); | |
297 | fattr->uid = be32_to_cpup(p++); | |
298 | fattr->gid = be32_to_cpup(p++); | |
299 | fattr->size = be32_to_cpup(p++); | |
300 | fattr->du.nfs2.blocksize = be32_to_cpup(p++); | |
301 | ||
302 | rdev = be32_to_cpup(p++); | |
303 | fattr->rdev = new_decode_dev(rdev); | |
304 | if (type == (u32)NFCHR && rdev == (u32)NFS2_FIFO_DEV) { | |
305 | fattr->mode = (fattr->mode & ~S_IFMT) | S_IFIFO; | |
306 | fattr->rdev = 0; | |
307 | } | |
308 | ||
309 | fattr->du.nfs2.blocks = be32_to_cpup(p++); | |
310 | fattr->fsid.major = be32_to_cpup(p++); | |
311 | fattr->fsid.minor = 0; | |
312 | fattr->fileid = be32_to_cpup(p++); | |
313 | ||
314 | p = xdr_decode_time(p, &fattr->atime); | |
315 | p = xdr_decode_time(p, &fattr->mtime); | |
316 | xdr_decode_time(p, &fattr->ctime); | |
3a1556e8 TM |
317 | fattr->change_attr = nfs_timespec_to_change_attr(&fattr->ctime); |
318 | ||
f796f8b3 CL |
319 | return 0; |
320 | out_overflow: | |
321 | print_overflow_msg(__func__, xdr); | |
322 | return -EIO; | |
323 | } | |
324 | ||
25a0866c CL |
325 | /* |
326 | * 2.3.6. sattr | |
327 | * | |
328 | * struct sattr { | |
329 | * unsigned int mode; | |
330 | * unsigned int uid; | |
331 | * unsigned int gid; | |
332 | * unsigned int size; | |
333 | * timeval atime; | |
334 | * timeval mtime; | |
335 | * }; | |
336 | */ | |
337 | ||
338 | #define NFS2_SATTR_NOT_SET (0xffffffff) | |
339 | ||
340 | static __be32 *xdr_time_not_set(__be32 *p) | |
341 | { | |
342 | *p++ = cpu_to_be32(NFS2_SATTR_NOT_SET); | |
343 | *p++ = cpu_to_be32(NFS2_SATTR_NOT_SET); | |
344 | return p; | |
345 | } | |
346 | ||
347 | static void encode_sattr(struct xdr_stream *xdr, const struct iattr *attr) | |
348 | { | |
349 | __be32 *p; | |
350 | ||
351 | p = xdr_reserve_space(xdr, NFS_sattr_sz << 2); | |
352 | ||
353 | if (attr->ia_valid & ATTR_MODE) | |
354 | *p++ = cpu_to_be32(attr->ia_mode); | |
355 | else | |
356 | *p++ = cpu_to_be32(NFS2_SATTR_NOT_SET); | |
357 | if (attr->ia_valid & ATTR_UID) | |
358 | *p++ = cpu_to_be32(attr->ia_uid); | |
359 | else | |
360 | *p++ = cpu_to_be32(NFS2_SATTR_NOT_SET); | |
361 | if (attr->ia_valid & ATTR_GID) | |
362 | *p++ = cpu_to_be32(attr->ia_gid); | |
363 | else | |
364 | *p++ = cpu_to_be32(NFS2_SATTR_NOT_SET); | |
365 | if (attr->ia_valid & ATTR_SIZE) | |
366 | *p++ = cpu_to_be32((u32)attr->ia_size); | |
367 | else | |
368 | *p++ = cpu_to_be32(NFS2_SATTR_NOT_SET); | |
369 | ||
370 | if (attr->ia_valid & ATTR_ATIME_SET) | |
371 | p = xdr_encode_time(p, &attr->ia_atime); | |
372 | else if (attr->ia_valid & ATTR_ATIME) | |
373 | p = xdr_encode_current_server_time(p, &attr->ia_atime); | |
374 | else | |
375 | p = xdr_time_not_set(p); | |
376 | if (attr->ia_valid & ATTR_MTIME_SET) | |
377 | xdr_encode_time(p, &attr->ia_mtime); | |
378 | else if (attr->ia_valid & ATTR_MTIME) | |
379 | xdr_encode_current_server_time(p, &attr->ia_mtime); | |
380 | else | |
381 | xdr_time_not_set(p); | |
382 | } | |
383 | ||
384 | /* | |
385 | * 2.3.7. filename | |
386 | * | |
387 | * typedef string filename<MAXNAMLEN>; | |
388 | */ | |
389 | static void encode_filename(struct xdr_stream *xdr, | |
390 | const char *name, u32 length) | |
391 | { | |
392 | __be32 *p; | |
393 | ||
394 | BUG_ON(length > NFS2_MAXNAMLEN); | |
395 | p = xdr_reserve_space(xdr, 4 + length); | |
396 | xdr_encode_opaque(p, name, length); | |
397 | } | |
398 | ||
f796f8b3 CL |
399 | static int decode_filename_inline(struct xdr_stream *xdr, |
400 | const char **name, u32 *length) | |
401 | { | |
402 | __be32 *p; | |
403 | u32 count; | |
404 | ||
405 | p = xdr_inline_decode(xdr, 4); | |
406 | if (unlikely(p == NULL)) | |
407 | goto out_overflow; | |
408 | count = be32_to_cpup(p); | |
409 | if (count > NFS3_MAXNAMLEN) | |
410 | goto out_nametoolong; | |
411 | p = xdr_inline_decode(xdr, count); | |
412 | if (unlikely(p == NULL)) | |
413 | goto out_overflow; | |
414 | *name = (const char *)p; | |
415 | *length = count; | |
416 | return 0; | |
417 | out_nametoolong: | |
418 | dprintk("NFS: returned filename too long: %u\n", count); | |
419 | return -ENAMETOOLONG; | |
420 | out_overflow: | |
421 | print_overflow_msg(__func__, xdr); | |
422 | return -EIO; | |
423 | } | |
424 | ||
25a0866c CL |
425 | /* |
426 | * 2.3.8. path | |
427 | * | |
428 | * typedef string path<MAXPATHLEN>; | |
429 | */ | |
430 | static void encode_path(struct xdr_stream *xdr, struct page **pages, u32 length) | |
431 | { | |
432 | __be32 *p; | |
433 | ||
434 | BUG_ON(length > NFS2_MAXPATHLEN); | |
435 | p = xdr_reserve_space(xdr, 4); | |
436 | *p = cpu_to_be32(length); | |
437 | xdr_write_pages(xdr, pages, 0, length); | |
438 | } | |
439 | ||
f796f8b3 CL |
440 | static int decode_path(struct xdr_stream *xdr) |
441 | { | |
442 | u32 length, recvd; | |
443 | size_t hdrlen; | |
444 | __be32 *p; | |
445 | ||
446 | p = xdr_inline_decode(xdr, 4); | |
447 | if (unlikely(p == NULL)) | |
448 | goto out_overflow; | |
449 | length = be32_to_cpup(p); | |
450 | if (unlikely(length >= xdr->buf->page_len || length > NFS_MAXPATHLEN)) | |
451 | goto out_size; | |
452 | hdrlen = (u8 *)xdr->p - (u8 *)xdr->iov->iov_base; | |
453 | recvd = xdr->buf->len - hdrlen; | |
454 | if (unlikely(length > recvd)) | |
455 | goto out_cheating; | |
456 | ||
457 | xdr_read_pages(xdr, length); | |
458 | xdr_terminate_string(xdr->buf, length); | |
459 | return 0; | |
460 | out_size: | |
461 | dprintk("NFS: returned pathname too long: %u\n", length); | |
462 | return -ENAMETOOLONG; | |
463 | out_cheating: | |
464 | dprintk("NFS: server cheating in pathname result: " | |
465 | "length %u > received %u\n", length, recvd); | |
466 | return -EIO; | |
467 | out_overflow: | |
468 | print_overflow_msg(__func__, xdr); | |
469 | return -EIO; | |
470 | } | |
471 | ||
472 | /* | |
473 | * 2.3.9. attrstat | |
474 | * | |
475 | * union attrstat switch (stat status) { | |
476 | * case NFS_OK: | |
477 | * fattr attributes; | |
478 | * default: | |
479 | * void; | |
480 | * }; | |
481 | */ | |
482 | static int decode_attrstat(struct xdr_stream *xdr, struct nfs_fattr *result) | |
483 | { | |
484 | enum nfs_stat status; | |
485 | int error; | |
486 | ||
487 | error = decode_stat(xdr, &status); | |
488 | if (unlikely(error)) | |
489 | goto out; | |
490 | if (status != NFS_OK) | |
491 | goto out_default; | |
492 | error = decode_fattr(xdr, result); | |
493 | out: | |
494 | return error; | |
495 | out_default: | |
496 | return nfs_stat_to_errno(status); | |
497 | } | |
498 | ||
25a0866c CL |
499 | /* |
500 | * 2.3.10. diropargs | |
501 | * | |
502 | * struct diropargs { | |
503 | * fhandle dir; | |
504 | * filename name; | |
505 | * }; | |
506 | */ | |
507 | static void encode_diropargs(struct xdr_stream *xdr, const struct nfs_fh *fh, | |
508 | const char *name, u32 length) | |
509 | { | |
510 | encode_fhandle(xdr, fh); | |
511 | encode_filename(xdr, name, length); | |
512 | } | |
513 | ||
f796f8b3 CL |
514 | /* |
515 | * 2.3.11. diropres | |
516 | * | |
517 | * union diropres switch (stat status) { | |
518 | * case NFS_OK: | |
519 | * struct { | |
520 | * fhandle file; | |
521 | * fattr attributes; | |
522 | * } diropok; | |
523 | * default: | |
524 | * void; | |
525 | * }; | |
526 | */ | |
527 | static int decode_diropok(struct xdr_stream *xdr, struct nfs_diropok *result) | |
528 | { | |
529 | int error; | |
530 | ||
531 | error = decode_fhandle(xdr, result->fh); | |
532 | if (unlikely(error)) | |
533 | goto out; | |
534 | error = decode_fattr(xdr, result->fattr); | |
535 | out: | |
536 | return error; | |
537 | } | |
538 | ||
539 | static int decode_diropres(struct xdr_stream *xdr, struct nfs_diropok *result) | |
540 | { | |
541 | enum nfs_stat status; | |
542 | int error; | |
543 | ||
544 | error = decode_stat(xdr, &status); | |
545 | if (unlikely(error)) | |
546 | goto out; | |
547 | if (status != NFS_OK) | |
548 | goto out_default; | |
549 | error = decode_diropok(xdr, result); | |
550 | out: | |
551 | return error; | |
552 | out_default: | |
553 | return nfs_stat_to_errno(status); | |
554 | } | |
555 | ||
25a0866c | 556 | |
1da177e4 | 557 | /* |
2d70f533 CL |
558 | * NFSv2 XDR encode functions |
559 | * | |
560 | * NFSv2 argument types are defined in section 2.2 of RFC 1094: | |
561 | * "NFS: Network File System Protocol Specification". | |
1da177e4 | 562 | */ |
1da177e4 | 563 | |
9f06c719 CL |
564 | static void nfs2_xdr_enc_fhandle(struct rpc_rqst *req, |
565 | struct xdr_stream *xdr, | |
566 | const struct nfs_fh *fh) | |
25a0866c | 567 | { |
9f06c719 | 568 | encode_fhandle(xdr, fh); |
25a0866c CL |
569 | } |
570 | ||
25a0866c CL |
571 | /* |
572 | * 2.2.3. sattrargs | |
573 | * | |
574 | * struct sattrargs { | |
575 | * fhandle file; | |
576 | * sattr attributes; | |
577 | * }; | |
578 | */ | |
9f06c719 CL |
579 | static void nfs2_xdr_enc_sattrargs(struct rpc_rqst *req, |
580 | struct xdr_stream *xdr, | |
581 | const struct nfs_sattrargs *args) | |
25a0866c | 582 | { |
9f06c719 CL |
583 | encode_fhandle(xdr, args->fh); |
584 | encode_sattr(xdr, args->sattr); | |
25a0866c CL |
585 | } |
586 | ||
9f06c719 CL |
587 | static void nfs2_xdr_enc_diropargs(struct rpc_rqst *req, |
588 | struct xdr_stream *xdr, | |
589 | const struct nfs_diropargs *args) | |
25a0866c | 590 | { |
9f06c719 | 591 | encode_diropargs(xdr, args->fh, args->name, args->len); |
25a0866c CL |
592 | } |
593 | ||
9f06c719 CL |
594 | static void nfs2_xdr_enc_readlinkargs(struct rpc_rqst *req, |
595 | struct xdr_stream *xdr, | |
596 | const struct nfs_readlinkargs *args) | |
25a0866c | 597 | { |
9f06c719 | 598 | encode_fhandle(xdr, args->fh); |
25a0866c CL |
599 | prepare_reply_buffer(req, args->pages, args->pgbase, |
600 | args->pglen, NFS_readlinkres_sz); | |
25a0866c CL |
601 | } |
602 | ||
25a0866c CL |
603 | /* |
604 | * 2.2.7. readargs | |
605 | * | |
606 | * struct readargs { | |
607 | * fhandle file; | |
608 | * unsigned offset; | |
609 | * unsigned count; | |
610 | * unsigned totalcount; | |
611 | * }; | |
612 | */ | |
613 | static void encode_readargs(struct xdr_stream *xdr, | |
614 | const struct nfs_readargs *args) | |
615 | { | |
616 | u32 offset = args->offset; | |
617 | u32 count = args->count; | |
618 | __be32 *p; | |
619 | ||
620 | encode_fhandle(xdr, args->fh); | |
621 | ||
622 | p = xdr_reserve_space(xdr, 4 + 4 + 4); | |
623 | *p++ = cpu_to_be32(offset); | |
624 | *p++ = cpu_to_be32(count); | |
625 | *p = cpu_to_be32(count); | |
626 | } | |
627 | ||
9f06c719 CL |
628 | static void nfs2_xdr_enc_readargs(struct rpc_rqst *req, |
629 | struct xdr_stream *xdr, | |
630 | const struct nfs_readargs *args) | |
25a0866c | 631 | { |
9f06c719 | 632 | encode_readargs(xdr, args); |
25a0866c CL |
633 | prepare_reply_buffer(req, args->pages, args->pgbase, |
634 | args->count, NFS_readres_sz); | |
635 | req->rq_rcv_buf.flags |= XDRBUF_READ; | |
25a0866c CL |
636 | } |
637 | ||
25a0866c CL |
638 | /* |
639 | * 2.2.9. writeargs | |
640 | * | |
641 | * struct writeargs { | |
642 | * fhandle file; | |
643 | * unsigned beginoffset; | |
644 | * unsigned offset; | |
645 | * unsigned totalcount; | |
646 | * nfsdata data; | |
647 | * }; | |
648 | */ | |
649 | static void encode_writeargs(struct xdr_stream *xdr, | |
650 | const struct nfs_writeargs *args) | |
651 | { | |
652 | u32 offset = args->offset; | |
653 | u32 count = args->count; | |
654 | __be32 *p; | |
655 | ||
656 | encode_fhandle(xdr, args->fh); | |
657 | ||
658 | p = xdr_reserve_space(xdr, 4 + 4 + 4 + 4); | |
659 | *p++ = cpu_to_be32(offset); | |
660 | *p++ = cpu_to_be32(offset); | |
661 | *p++ = cpu_to_be32(count); | |
662 | ||
663 | /* nfsdata */ | |
664 | *p = cpu_to_be32(count); | |
665 | xdr_write_pages(xdr, args->pages, args->pgbase, count); | |
666 | } | |
667 | ||
9f06c719 CL |
668 | static void nfs2_xdr_enc_writeargs(struct rpc_rqst *req, |
669 | struct xdr_stream *xdr, | |
670 | const struct nfs_writeargs *args) | |
25a0866c | 671 | { |
9f06c719 CL |
672 | encode_writeargs(xdr, args); |
673 | xdr->buf->flags |= XDRBUF_WRITE; | |
25a0866c CL |
674 | } |
675 | ||
25a0866c CL |
676 | /* |
677 | * 2.2.10. createargs | |
678 | * | |
679 | * struct createargs { | |
680 | * diropargs where; | |
681 | * sattr attributes; | |
682 | * }; | |
683 | */ | |
9f06c719 CL |
684 | static void nfs2_xdr_enc_createargs(struct rpc_rqst *req, |
685 | struct xdr_stream *xdr, | |
686 | const struct nfs_createargs *args) | |
25a0866c | 687 | { |
9f06c719 CL |
688 | encode_diropargs(xdr, args->fh, args->name, args->len); |
689 | encode_sattr(xdr, args->sattr); | |
25a0866c CL |
690 | } |
691 | ||
9f06c719 CL |
692 | static void nfs2_xdr_enc_removeargs(struct rpc_rqst *req, |
693 | struct xdr_stream *xdr, | |
694 | const struct nfs_removeargs *args) | |
25a0866c | 695 | { |
9f06c719 | 696 | encode_diropargs(xdr, args->fh, args->name.name, args->name.len); |
25a0866c CL |
697 | } |
698 | ||
25a0866c CL |
699 | /* |
700 | * 2.2.12. renameargs | |
701 | * | |
702 | * struct renameargs { | |
703 | * diropargs from; | |
704 | * diropargs to; | |
705 | * }; | |
706 | */ | |
9f06c719 CL |
707 | static void nfs2_xdr_enc_renameargs(struct rpc_rqst *req, |
708 | struct xdr_stream *xdr, | |
709 | const struct nfs_renameargs *args) | |
25a0866c CL |
710 | { |
711 | const struct qstr *old = args->old_name; | |
712 | const struct qstr *new = args->new_name; | |
25a0866c | 713 | |
9f06c719 CL |
714 | encode_diropargs(xdr, args->old_dir, old->name, old->len); |
715 | encode_diropargs(xdr, args->new_dir, new->name, new->len); | |
25a0866c CL |
716 | } |
717 | ||
25a0866c CL |
718 | /* |
719 | * 2.2.13. linkargs | |
720 | * | |
721 | * struct linkargs { | |
722 | * fhandle from; | |
723 | * diropargs to; | |
724 | * }; | |
725 | */ | |
9f06c719 CL |
726 | static void nfs2_xdr_enc_linkargs(struct rpc_rqst *req, |
727 | struct xdr_stream *xdr, | |
728 | const struct nfs_linkargs *args) | |
25a0866c | 729 | { |
9f06c719 CL |
730 | encode_fhandle(xdr, args->fromfh); |
731 | encode_diropargs(xdr, args->tofh, args->toname, args->tolen); | |
25a0866c CL |
732 | } |
733 | ||
25a0866c CL |
734 | /* |
735 | * 2.2.14. symlinkargs | |
736 | * | |
737 | * struct symlinkargs { | |
738 | * diropargs from; | |
739 | * path to; | |
740 | * sattr attributes; | |
741 | * }; | |
742 | */ | |
9f06c719 CL |
743 | static void nfs2_xdr_enc_symlinkargs(struct rpc_rqst *req, |
744 | struct xdr_stream *xdr, | |
745 | const struct nfs_symlinkargs *args) | |
25a0866c | 746 | { |
9f06c719 CL |
747 | encode_diropargs(xdr, args->fromfh, args->fromname, args->fromlen); |
748 | encode_path(xdr, args->pages, args->pathlen); | |
749 | encode_sattr(xdr, args->sattr); | |
25a0866c CL |
750 | } |
751 | ||
25a0866c CL |
752 | /* |
753 | * 2.2.17. readdirargs | |
754 | * | |
755 | * struct readdirargs { | |
756 | * fhandle dir; | |
757 | * nfscookie cookie; | |
758 | * unsigned count; | |
759 | * }; | |
760 | */ | |
761 | static void encode_readdirargs(struct xdr_stream *xdr, | |
762 | const struct nfs_readdirargs *args) | |
763 | { | |
764 | __be32 *p; | |
765 | ||
766 | encode_fhandle(xdr, args->fh); | |
767 | ||
768 | p = xdr_reserve_space(xdr, 4 + 4); | |
769 | *p++ = cpu_to_be32(args->cookie); | |
770 | *p = cpu_to_be32(args->count); | |
771 | } | |
772 | ||
9f06c719 CL |
773 | static void nfs2_xdr_enc_readdirargs(struct rpc_rqst *req, |
774 | struct xdr_stream *xdr, | |
775 | const struct nfs_readdirargs *args) | |
25a0866c | 776 | { |
9f06c719 | 777 | encode_readdirargs(xdr, args); |
25a0866c CL |
778 | prepare_reply_buffer(req, args->pages, 0, |
779 | args->count, NFS_readdirres_sz); | |
25a0866c CL |
780 | } |
781 | ||
1da177e4 | 782 | /* |
661ad423 CL |
783 | * NFSv2 XDR decode functions |
784 | * | |
785 | * NFSv2 result types are defined in section 2.2 of RFC 1094: | |
786 | * "NFS: Network File System Protocol Specification". | |
1da177e4 | 787 | */ |
1da177e4 | 788 | |
bf269551 | 789 | static int nfs2_xdr_dec_stat(struct rpc_rqst *req, struct xdr_stream *xdr, |
f796f8b3 CL |
790 | void *__unused) |
791 | { | |
f796f8b3 CL |
792 | enum nfs_stat status; |
793 | int error; | |
794 | ||
bf269551 | 795 | error = decode_stat(xdr, &status); |
f796f8b3 CL |
796 | if (unlikely(error)) |
797 | goto out; | |
798 | if (status != NFS_OK) | |
799 | goto out_default; | |
800 | out: | |
801 | return error; | |
802 | out_default: | |
803 | return nfs_stat_to_errno(status); | |
804 | } | |
805 | ||
bf269551 | 806 | static int nfs2_xdr_dec_attrstat(struct rpc_rqst *req, struct xdr_stream *xdr, |
f796f8b3 CL |
807 | struct nfs_fattr *result) |
808 | { | |
bf269551 | 809 | return decode_attrstat(xdr, result); |
f796f8b3 CL |
810 | } |
811 | ||
bf269551 | 812 | static int nfs2_xdr_dec_diropres(struct rpc_rqst *req, struct xdr_stream *xdr, |
f796f8b3 CL |
813 | struct nfs_diropok *result) |
814 | { | |
bf269551 | 815 | return decode_diropres(xdr, result); |
f796f8b3 CL |
816 | } |
817 | ||
f796f8b3 CL |
818 | /* |
819 | * 2.2.6. readlinkres | |
820 | * | |
821 | * union readlinkres switch (stat status) { | |
822 | * case NFS_OK: | |
823 | * path data; | |
824 | * default: | |
825 | * void; | |
826 | * }; | |
827 | */ | |
bf269551 CL |
828 | static int nfs2_xdr_dec_readlinkres(struct rpc_rqst *req, |
829 | struct xdr_stream *xdr, void *__unused) | |
f796f8b3 | 830 | { |
f796f8b3 CL |
831 | enum nfs_stat status; |
832 | int error; | |
833 | ||
bf269551 | 834 | error = decode_stat(xdr, &status); |
f796f8b3 CL |
835 | if (unlikely(error)) |
836 | goto out; | |
837 | if (status != NFS_OK) | |
838 | goto out_default; | |
bf269551 | 839 | error = decode_path(xdr); |
f796f8b3 CL |
840 | out: |
841 | return error; | |
842 | out_default: | |
843 | return nfs_stat_to_errno(status); | |
844 | } | |
845 | ||
846 | /* | |
847 | * 2.2.7. readres | |
848 | * | |
849 | * union readres switch (stat status) { | |
850 | * case NFS_OK: | |
851 | * fattr attributes; | |
852 | * nfsdata data; | |
853 | * default: | |
854 | * void; | |
855 | * }; | |
856 | */ | |
bf269551 | 857 | static int nfs2_xdr_dec_readres(struct rpc_rqst *req, struct xdr_stream *xdr, |
f796f8b3 CL |
858 | struct nfs_readres *result) |
859 | { | |
f796f8b3 CL |
860 | enum nfs_stat status; |
861 | int error; | |
862 | ||
bf269551 | 863 | error = decode_stat(xdr, &status); |
f796f8b3 CL |
864 | if (unlikely(error)) |
865 | goto out; | |
866 | if (status != NFS_OK) | |
867 | goto out_default; | |
bf269551 | 868 | error = decode_fattr(xdr, result->fattr); |
f796f8b3 CL |
869 | if (unlikely(error)) |
870 | goto out; | |
bf269551 | 871 | error = decode_nfsdata(xdr, result); |
f796f8b3 CL |
872 | out: |
873 | return error; | |
874 | out_default: | |
875 | return nfs_stat_to_errno(status); | |
876 | } | |
877 | ||
bf269551 | 878 | static int nfs2_xdr_dec_writeres(struct rpc_rqst *req, struct xdr_stream *xdr, |
f796f8b3 CL |
879 | struct nfs_writeres *result) |
880 | { | |
f796f8b3 CL |
881 | /* All NFSv2 writes are "file sync" writes */ |
882 | result->verf->committed = NFS_FILE_SYNC; | |
bf269551 | 883 | return decode_attrstat(xdr, result->fattr); |
f796f8b3 CL |
884 | } |
885 | ||
886 | /** | |
887 | * nfs2_decode_dirent - Decode a single NFSv2 directory entry stored in | |
888 | * the local page cache. | |
889 | * @xdr: XDR stream where entry resides | |
890 | * @entry: buffer to fill in with entry data | |
f796f8b3 CL |
891 | * @plus: boolean indicating whether this should be a readdirplus entry |
892 | * | |
573c4e1e CL |
893 | * Returns zero if successful, otherwise a negative errno value is |
894 | * returned. | |
f796f8b3 CL |
895 | * |
896 | * This function is not invoked during READDIR reply decoding, but | |
897 | * rather whenever an application invokes the getdents(2) system call | |
898 | * on a directory already in our cache. | |
899 | * | |
900 | * 2.2.17. entry | |
901 | * | |
902 | * struct entry { | |
903 | * unsigned fileid; | |
904 | * filename name; | |
905 | * nfscookie cookie; | |
906 | * entry *nextentry; | |
907 | * }; | |
908 | */ | |
573c4e1e CL |
909 | int nfs2_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, |
910 | int plus) | |
f796f8b3 CL |
911 | { |
912 | __be32 *p; | |
913 | int error; | |
914 | ||
915 | p = xdr_inline_decode(xdr, 4); | |
916 | if (unlikely(p == NULL)) | |
917 | goto out_overflow; | |
918 | if (*p++ == xdr_zero) { | |
919 | p = xdr_inline_decode(xdr, 4); | |
920 | if (unlikely(p == NULL)) | |
921 | goto out_overflow; | |
922 | if (*p++ == xdr_zero) | |
573c4e1e | 923 | return -EAGAIN; |
f796f8b3 | 924 | entry->eof = 1; |
573c4e1e | 925 | return -EBADCOOKIE; |
f796f8b3 CL |
926 | } |
927 | ||
928 | p = xdr_inline_decode(xdr, 4); | |
929 | if (unlikely(p == NULL)) | |
930 | goto out_overflow; | |
931 | entry->ino = be32_to_cpup(p); | |
932 | ||
933 | error = decode_filename_inline(xdr, &entry->name, &entry->len); | |
934 | if (unlikely(error)) | |
573c4e1e | 935 | return error; |
f796f8b3 CL |
936 | |
937 | /* | |
938 | * The type (size and byte order) of nfscookie isn't defined in | |
939 | * RFC 1094. This implementation assumes that it's an XDR uint32. | |
940 | */ | |
941 | entry->prev_cookie = entry->cookie; | |
942 | p = xdr_inline_decode(xdr, 4); | |
943 | if (unlikely(p == NULL)) | |
944 | goto out_overflow; | |
945 | entry->cookie = be32_to_cpup(p); | |
946 | ||
947 | entry->d_type = DT_UNKNOWN; | |
948 | ||
573c4e1e | 949 | return 0; |
f796f8b3 CL |
950 | |
951 | out_overflow: | |
952 | print_overflow_msg(__func__, xdr); | |
573c4e1e | 953 | return -EAGAIN; |
f796f8b3 CL |
954 | } |
955 | ||
956 | /* | |
957 | * 2.2.17. readdirres | |
958 | * | |
959 | * union readdirres switch (stat status) { | |
960 | * case NFS_OK: | |
961 | * struct { | |
962 | * entry *entries; | |
963 | * bool eof; | |
964 | * } readdirok; | |
965 | * default: | |
966 | * void; | |
967 | * }; | |
968 | * | |
969 | * Read the directory contents into the page cache, but don't | |
970 | * touch them. The actual decoding is done by nfs2_decode_dirent() | |
971 | * during subsequent nfs_readdir() calls. | |
972 | */ | |
973 | static int decode_readdirok(struct xdr_stream *xdr) | |
974 | { | |
975 | u32 recvd, pglen; | |
976 | size_t hdrlen; | |
977 | ||
978 | pglen = xdr->buf->page_len; | |
979 | hdrlen = (u8 *)xdr->p - (u8 *)xdr->iov->iov_base; | |
980 | recvd = xdr->buf->len - hdrlen; | |
981 | if (unlikely(pglen > recvd)) | |
982 | goto out_cheating; | |
983 | out: | |
984 | xdr_read_pages(xdr, pglen); | |
985 | return pglen; | |
986 | out_cheating: | |
987 | dprintk("NFS: server cheating in readdir result: " | |
988 | "pglen %u > recvd %u\n", pglen, recvd); | |
989 | pglen = recvd; | |
990 | goto out; | |
991 | } | |
992 | ||
bf269551 CL |
993 | static int nfs2_xdr_dec_readdirres(struct rpc_rqst *req, |
994 | struct xdr_stream *xdr, void *__unused) | |
f796f8b3 | 995 | { |
f796f8b3 CL |
996 | enum nfs_stat status; |
997 | int error; | |
998 | ||
bf269551 | 999 | error = decode_stat(xdr, &status); |
f796f8b3 CL |
1000 | if (unlikely(error)) |
1001 | goto out; | |
1002 | if (status != NFS_OK) | |
1003 | goto out_default; | |
bf269551 | 1004 | error = decode_readdirok(xdr); |
f796f8b3 CL |
1005 | out: |
1006 | return error; | |
1007 | out_default: | |
1008 | return nfs_stat_to_errno(status); | |
1009 | } | |
1010 | ||
f796f8b3 CL |
1011 | /* |
1012 | * 2.2.18. statfsres | |
1013 | * | |
1014 | * union statfsres (stat status) { | |
1015 | * case NFS_OK: | |
1016 | * struct { | |
1017 | * unsigned tsize; | |
1018 | * unsigned bsize; | |
1019 | * unsigned blocks; | |
1020 | * unsigned bfree; | |
1021 | * unsigned bavail; | |
1022 | * } info; | |
1023 | * default: | |
1024 | * void; | |
1025 | * }; | |
1026 | */ | |
1027 | static int decode_info(struct xdr_stream *xdr, struct nfs2_fsstat *result) | |
1028 | { | |
1029 | __be32 *p; | |
1030 | ||
1031 | p = xdr_inline_decode(xdr, NFS_info_sz << 2); | |
1032 | if (unlikely(p == NULL)) | |
1033 | goto out_overflow; | |
1034 | result->tsize = be32_to_cpup(p++); | |
1035 | result->bsize = be32_to_cpup(p++); | |
1036 | result->blocks = be32_to_cpup(p++); | |
1037 | result->bfree = be32_to_cpup(p++); | |
1038 | result->bavail = be32_to_cpup(p); | |
1039 | return 0; | |
1040 | out_overflow: | |
1041 | print_overflow_msg(__func__, xdr); | |
1042 | return -EIO; | |
1043 | } | |
1044 | ||
bf269551 | 1045 | static int nfs2_xdr_dec_statfsres(struct rpc_rqst *req, struct xdr_stream *xdr, |
f796f8b3 CL |
1046 | struct nfs2_fsstat *result) |
1047 | { | |
f796f8b3 CL |
1048 | enum nfs_stat status; |
1049 | int error; | |
1050 | ||
bf269551 | 1051 | error = decode_stat(xdr, &status); |
f796f8b3 CL |
1052 | if (unlikely(error)) |
1053 | goto out; | |
1054 | if (status != NFS_OK) | |
1055 | goto out_default; | |
bf269551 | 1056 | error = decode_info(xdr, result); |
f796f8b3 CL |
1057 | out: |
1058 | return error; | |
1059 | out_default: | |
1060 | return nfs_stat_to_errno(status); | |
1061 | } | |
1062 | ||
1063 | ||
1da177e4 LT |
1064 | /* |
1065 | * We need to translate between nfs status return values and | |
1066 | * the local errno values which may not be the same. | |
1067 | */ | |
85828493 | 1068 | static const struct { |
1da177e4 LT |
1069 | int stat; |
1070 | int errno; | |
1071 | } nfs_errtbl[] = { | |
1072 | { NFS_OK, 0 }, | |
856dff3d BH |
1073 | { NFSERR_PERM, -EPERM }, |
1074 | { NFSERR_NOENT, -ENOENT }, | |
1075 | { NFSERR_IO, -errno_NFSERR_IO}, | |
1076 | { NFSERR_NXIO, -ENXIO }, | |
1077 | /* { NFSERR_EAGAIN, -EAGAIN }, */ | |
1078 | { NFSERR_ACCES, -EACCES }, | |
1079 | { NFSERR_EXIST, -EEXIST }, | |
1080 | { NFSERR_XDEV, -EXDEV }, | |
1081 | { NFSERR_NODEV, -ENODEV }, | |
1082 | { NFSERR_NOTDIR, -ENOTDIR }, | |
1083 | { NFSERR_ISDIR, -EISDIR }, | |
1084 | { NFSERR_INVAL, -EINVAL }, | |
1085 | { NFSERR_FBIG, -EFBIG }, | |
1086 | { NFSERR_NOSPC, -ENOSPC }, | |
1087 | { NFSERR_ROFS, -EROFS }, | |
1088 | { NFSERR_MLINK, -EMLINK }, | |
1089 | { NFSERR_NAMETOOLONG, -ENAMETOOLONG }, | |
1090 | { NFSERR_NOTEMPTY, -ENOTEMPTY }, | |
1091 | { NFSERR_DQUOT, -EDQUOT }, | |
1092 | { NFSERR_STALE, -ESTALE }, | |
1093 | { NFSERR_REMOTE, -EREMOTE }, | |
1da177e4 | 1094 | #ifdef EWFLUSH |
856dff3d | 1095 | { NFSERR_WFLUSH, -EWFLUSH }, |
1da177e4 | 1096 | #endif |
856dff3d BH |
1097 | { NFSERR_BADHANDLE, -EBADHANDLE }, |
1098 | { NFSERR_NOT_SYNC, -ENOTSYNC }, | |
1099 | { NFSERR_BAD_COOKIE, -EBADCOOKIE }, | |
1100 | { NFSERR_NOTSUPP, -ENOTSUPP }, | |
1101 | { NFSERR_TOOSMALL, -ETOOSMALL }, | |
fdcb4577 | 1102 | { NFSERR_SERVERFAULT, -EREMOTEIO }, |
856dff3d BH |
1103 | { NFSERR_BADTYPE, -EBADTYPE }, |
1104 | { NFSERR_JUKEBOX, -EJUKEBOX }, | |
1105 | { -1, -EIO } | |
1da177e4 LT |
1106 | }; |
1107 | ||
85828493 CL |
1108 | /** |
1109 | * nfs_stat_to_errno - convert an NFS status code to a local errno | |
1110 | * @status: NFS status code to convert | |
1111 | * | |
1112 | * Returns a local errno value, or -EIO if the NFS status code is | |
1113 | * not recognized. This function is used jointly by NFSv2 and NFSv3. | |
1da177e4 | 1114 | */ |
5e7e5a0d | 1115 | static int nfs_stat_to_errno(enum nfs_stat status) |
1da177e4 LT |
1116 | { |
1117 | int i; | |
1118 | ||
1119 | for (i = 0; nfs_errtbl[i].stat != -1; i++) { | |
85828493 | 1120 | if (nfs_errtbl[i].stat == (int)status) |
1da177e4 LT |
1121 | return nfs_errtbl[i].errno; |
1122 | } | |
85828493 | 1123 | dprintk("NFS: Unrecognized nfs status value: %u\n", status); |
1da177e4 LT |
1124 | return nfs_errtbl[i].errno; |
1125 | } | |
1126 | ||
1da177e4 LT |
1127 | #define PROC(proc, argtype, restype, timer) \ |
1128 | [NFSPROC_##proc] = { \ | |
1129 | .p_proc = NFSPROC_##proc, \ | |
9f06c719 | 1130 | .p_encode = (kxdreproc_t)nfs2_xdr_enc_##argtype, \ |
bf269551 | 1131 | .p_decode = (kxdrdproc_t)nfs2_xdr_dec_##restype, \ |
2bea90d4 CL |
1132 | .p_arglen = NFS_##argtype##_sz, \ |
1133 | .p_replen = NFS_##restype##_sz, \ | |
cc0175c1 CL |
1134 | .p_timer = timer, \ |
1135 | .p_statidx = NFSPROC_##proc, \ | |
1136 | .p_name = #proc, \ | |
1da177e4 LT |
1137 | } |
1138 | struct rpc_procinfo nfs_procedures[] = { | |
7d93bd71 CL |
1139 | PROC(GETATTR, fhandle, attrstat, 1), |
1140 | PROC(SETATTR, sattrargs, attrstat, 0), | |
1141 | PROC(LOOKUP, diropargs, diropres, 2), | |
1142 | PROC(READLINK, readlinkargs, readlinkres, 3), | |
1143 | PROC(READ, readargs, readres, 3), | |
1144 | PROC(WRITE, writeargs, writeres, 4), | |
1145 | PROC(CREATE, createargs, diropres, 0), | |
1146 | PROC(REMOVE, removeargs, stat, 0), | |
1147 | PROC(RENAME, renameargs, stat, 0), | |
1148 | PROC(LINK, linkargs, stat, 0), | |
1149 | PROC(SYMLINK, symlinkargs, stat, 0), | |
1150 | PROC(MKDIR, createargs, diropres, 0), | |
1151 | PROC(RMDIR, diropargs, stat, 0), | |
1152 | PROC(READDIR, readdirargs, readdirres, 3), | |
1153 | PROC(STATFS, fhandle, statfsres, 0), | |
1da177e4 LT |
1154 | }; |
1155 | ||
a613fa16 | 1156 | const struct rpc_version nfs_version2 = { |
1da177e4 | 1157 | .number = 2, |
e8c96f8c | 1158 | .nrprocs = ARRAY_SIZE(nfs_procedures), |
1da177e4 LT |
1159 | .procs = nfs_procedures |
1160 | }; |