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uio: documentation fixups
[zen-stable.git] / fs / nfsd / nfsproc.c
blobe15dc45fc5ec01c09a05d42b8ac600ed39e3892f
1 /*
2 * Process version 2 NFS requests.
3 *
4 * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
5 */
6
7 #include <linux/namei.h>
8
9 #include "cache.h"
10 #include "xdr.h"
11 #include "vfs.h"
12
13 typedef struct svc_rqst svc_rqst;
14 typedef struct svc_buf svc_buf;
15
16 #define NFSDDBG_FACILITY NFSDDBG_PROC
17
18
19 static __be32
20 nfsd_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
21 {
22 return nfs_ok;
23 }
24
25 static __be32
26 nfsd_return_attrs(__be32 err, struct nfsd_attrstat *resp)
27 {
28 if (err) return err;
29 return nfserrno(vfs_getattr(resp->fh.fh_export->ex_path.mnt,
30 resp->fh.fh_dentry,
31 &resp->stat));
32 }
33 static __be32
34 nfsd_return_dirop(__be32 err, struct nfsd_diropres *resp)
35 {
36 if (err) return err;
37 return nfserrno(vfs_getattr(resp->fh.fh_export->ex_path.mnt,
38 resp->fh.fh_dentry,
39 &resp->stat));
40 }
41 /*
42 * Get a file's attributes
43 * N.B. After this call resp->fh needs an fh_put
44 */
45 static __be32
46 nfsd_proc_getattr(struct svc_rqst *rqstp, struct nfsd_fhandle *argp,
47 struct nfsd_attrstat *resp)
48 {
49 __be32 nfserr;
50 dprintk("nfsd: GETATTR %s\n", SVCFH_fmt(&argp->fh));
51
52 fh_copy(&resp->fh, &argp->fh);
53 nfserr = fh_verify(rqstp, &resp->fh, 0,
54 NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT);
55 return nfsd_return_attrs(nfserr, resp);
56 }
57
58 /*
59 * Set a file's attributes
60 * N.B. After this call resp->fh needs an fh_put
61 */
62 static __be32
63 nfsd_proc_setattr(struct svc_rqst *rqstp, struct nfsd_sattrargs *argp,
64 struct nfsd_attrstat *resp)
65 {
66 __be32 nfserr;
67 dprintk("nfsd: SETATTR %s, valid=%x, size=%ld\n",
68 SVCFH_fmt(&argp->fh),
69 argp->attrs.ia_valid, (long) argp->attrs.ia_size);
70
71 fh_copy(&resp->fh, &argp->fh);
72 nfserr = nfsd_setattr(rqstp, &resp->fh, &argp->attrs,0, (time_t)0);
73 return nfsd_return_attrs(nfserr, resp);
74 }
75
76 /*
77 * Look up a path name component
78 * Note: the dentry in the resp->fh may be negative if the file
79 * doesn't exist yet.
80 * N.B. After this call resp->fh needs an fh_put
81 */
82 static __be32
83 nfsd_proc_lookup(struct svc_rqst *rqstp, struct nfsd_diropargs *argp,
84 struct nfsd_diropres *resp)
85 {
86 __be32 nfserr;
87
88 dprintk("nfsd: LOOKUP %s %.*s\n",
89 SVCFH_fmt(&argp->fh), argp->len, argp->name);
90
91 fh_init(&resp->fh, NFS_FHSIZE);
92 nfserr = nfsd_lookup(rqstp, &argp->fh, argp->name, argp->len,
93 &resp->fh);
94
95 fh_put(&argp->fh);
96 return nfsd_return_dirop(nfserr, resp);
97 }
98
99 /*
100 * Read a symlink.
101 */
102 static __be32
103 nfsd_proc_readlink(struct svc_rqst *rqstp, struct nfsd_readlinkargs *argp,
104 struct nfsd_readlinkres *resp)
105 {
106 __be32 nfserr;
107
108 dprintk("nfsd: READLINK %s\n", SVCFH_fmt(&argp->fh));
109
110 /* Read the symlink. */
111 resp->len = NFS_MAXPATHLEN;
112 nfserr = nfsd_readlink(rqstp, &argp->fh, argp->buffer, &resp->len);
113
114 fh_put(&argp->fh);
115 return nfserr;
116 }
117
118 /*
119 * Read a portion of a file.
120 * N.B. After this call resp->fh needs an fh_put
121 */
122 static __be32
123 nfsd_proc_read(struct svc_rqst *rqstp, struct nfsd_readargs *argp,
124 struct nfsd_readres *resp)
125 {
126 __be32 nfserr;
127
128 dprintk("nfsd: READ %s %d bytes at %d\n",
129 SVCFH_fmt(&argp->fh),
130 argp->count, argp->offset);
131
132 /* Obtain buffer pointer for payload. 19 is 1 word for
133 * status, 17 words for fattr, and 1 word for the byte count.
134 */
135
136 if (NFSSVC_MAXBLKSIZE_V2 < argp->count) {
137 char buf[RPC_MAX_ADDRBUFLEN];
138 printk(KERN_NOTICE
139 "oversized read request from %s (%d bytes)\n",
140 svc_print_addr(rqstp, buf, sizeof(buf)),
141 argp->count);
142 argp->count = NFSSVC_MAXBLKSIZE_V2;
143 }
144 svc_reserve_auth(rqstp, (19<<2) + argp->count + 4);
145
146 resp->count = argp->count;
147 nfserr = nfsd_read(rqstp, fh_copy(&resp->fh, &argp->fh),
148 argp->offset,
149 rqstp->rq_vec, argp->vlen,
150 &resp->count);
151
152 if (nfserr) return nfserr;
153 return nfserrno(vfs_getattr(resp->fh.fh_export->ex_path.mnt,
154 resp->fh.fh_dentry,
155 &resp->stat));
156 }
157
158 /*
159 * Write data to a file
160 * N.B. After this call resp->fh needs an fh_put
161 */
162 static __be32
163 nfsd_proc_write(struct svc_rqst *rqstp, struct nfsd_writeargs *argp,
164 struct nfsd_attrstat *resp)
165 {
166 __be32 nfserr;
167 int stable = 1;
168 unsigned long cnt = argp->len;
169
170 dprintk("nfsd: WRITE %s %d bytes at %d\n",
171 SVCFH_fmt(&argp->fh),
172 argp->len, argp->offset);
173
174 nfserr = nfsd_write(rqstp, fh_copy(&resp->fh, &argp->fh), NULL,
175 argp->offset,
176 rqstp->rq_vec, argp->vlen,
177 &cnt,
178 &stable);
179 return nfsd_return_attrs(nfserr, resp);
180 }
181
182 /*
183 * CREATE processing is complicated. The keyword here is `overloaded.'
184 * The parent directory is kept locked between the check for existence
185 * and the actual create() call in compliance with VFS protocols.
186 * N.B. After this call _both_ argp->fh and resp->fh need an fh_put
187 */
188 static __be32
189 nfsd_proc_create(struct svc_rqst *rqstp, struct nfsd_createargs *argp,
190 struct nfsd_diropres *resp)
191 {
192 svc_fh *dirfhp = &argp->fh;
193 svc_fh *newfhp = &resp->fh;
194 struct iattr *attr = &argp->attrs;
195 struct inode *inode;
196 struct dentry *dchild;
197 int type, mode;
198 __be32 nfserr;
199 dev_t rdev = 0, wanted = new_decode_dev(attr->ia_size);
200
201 dprintk("nfsd: CREATE %s %.*s\n",
202 SVCFH_fmt(dirfhp), argp->len, argp->name);
203
204 /* First verify the parent file handle */
205 nfserr = fh_verify(rqstp, dirfhp, S_IFDIR, NFSD_MAY_EXEC);
206 if (nfserr)
207 goto done; /* must fh_put dirfhp even on error */
208
209 /* Check for NFSD_MAY_WRITE in nfsd_create if necessary */
210
211 nfserr = nfserr_acces;
212 if (!argp->len)
213 goto done;
214 nfserr = nfserr_exist;
215 if (isdotent(argp->name, argp->len))
216 goto done;
217 fh_lock_nested(dirfhp, I_MUTEX_PARENT);
218 dchild = lookup_one_len(argp->name, dirfhp->fh_dentry, argp->len);
219 if (IS_ERR(dchild)) {
220 nfserr = nfserrno(PTR_ERR(dchild));
221 goto out_unlock;
222 }
223 fh_init(newfhp, NFS_FHSIZE);
224 nfserr = fh_compose(newfhp, dirfhp->fh_export, dchild, dirfhp);
225 if (!nfserr && !dchild->d_inode)
226 nfserr = nfserr_noent;
227 dput(dchild);
228 if (nfserr) {
229 if (nfserr != nfserr_noent)
230 goto out_unlock;
231 /*
232 * If the new file handle wasn't verified, we can't tell
233 * whether the file exists or not. Time to bail ...
234 */
235 nfserr = nfserr_acces;
236 if (!newfhp->fh_dentry) {
237 printk(KERN_WARNING
238 "nfsd_proc_create: file handle not verified\n");
239 goto out_unlock;
240 }
241 }
242
243 inode = newfhp->fh_dentry->d_inode;
244
245 /* Unfudge the mode bits */
246 if (attr->ia_valid & ATTR_MODE) {
247 type = attr->ia_mode & S_IFMT;
248 mode = attr->ia_mode & ~S_IFMT;
249 if (!type) {
250 /* no type, so if target exists, assume same as that,
251 * else assume a file */
252 if (inode) {
253 type = inode->i_mode & S_IFMT;
254 switch(type) {
255 case S_IFCHR:
256 case S_IFBLK:
257 /* reserve rdev for later checking */
258 rdev = inode->i_rdev;
259 attr->ia_valid |= ATTR_SIZE;
260
261 /* FALLTHROUGH */
262 case S_IFIFO:
263 /* this is probably a permission check..
264 * at least IRIX implements perm checking on
265 * echo thing > device-special-file-or-pipe
266 * by doing a CREATE with type==0
267 */
268 nfserr = nfsd_permission(rqstp,
269 newfhp->fh_export,
270 newfhp->fh_dentry,
271 NFSD_MAY_WRITE|NFSD_MAY_LOCAL_ACCESS);
272 if (nfserr && nfserr != nfserr_rofs)
273 goto out_unlock;
274 }
275 } else
276 type = S_IFREG;
277 }
278 } else if (inode) {
279 type = inode->i_mode & S_IFMT;
280 mode = inode->i_mode & ~S_IFMT;
281 } else {
282 type = S_IFREG;
283 mode = 0; /* ??? */
284 }
285
286 attr->ia_valid |= ATTR_MODE;
287 attr->ia_mode = mode;
288
289 /* Special treatment for non-regular files according to the
290 * gospel of sun micro
291 */
292 if (type != S_IFREG) {
293 if (type != S_IFBLK && type != S_IFCHR) {
294 rdev = 0;
295 } else if (type == S_IFCHR && !(attr->ia_valid & ATTR_SIZE)) {
296 /* If you think you've seen the worst, grok this. */
297 type = S_IFIFO;
298 } else {
299 /* Okay, char or block special */
300 if (!rdev)
301 rdev = wanted;
302 }
303
304 /* we've used the SIZE information, so discard it */
305 attr->ia_valid &= ~ATTR_SIZE;
306
307 /* Make sure the type and device matches */
308 nfserr = nfserr_exist;
309 if (inode && type != (inode->i_mode & S_IFMT))
310 goto out_unlock;
311 }
312
313 nfserr = 0;
314 if (!inode) {
315 /* File doesn't exist. Create it and set attrs */
316 nfserr = nfsd_create(rqstp, dirfhp, argp->name, argp->len,
317 attr, type, rdev, newfhp);
318 } else if (type == S_IFREG) {
319 dprintk("nfsd: existing %s, valid=%x, size=%ld\n",
320 argp->name, attr->ia_valid, (long) attr->ia_size);
321 /* File already exists. We ignore all attributes except
322 * size, so that creat() behaves exactly like
323 * open(..., O_CREAT|O_TRUNC|O_WRONLY).
324 */
325 attr->ia_valid &= ATTR_SIZE;
326 if (attr->ia_valid)
327 nfserr = nfsd_setattr(rqstp, newfhp, attr, 0, (time_t)0);
328 }
329
330 out_unlock:
331 /* We don't really need to unlock, as fh_put does it. */
332 fh_unlock(dirfhp);
333
334 done:
335 fh_put(dirfhp);
336 return nfsd_return_dirop(nfserr, resp);
337 }
338
339 static __be32
340 nfsd_proc_remove(struct svc_rqst *rqstp, struct nfsd_diropargs *argp,
341 void *resp)
342 {
343 __be32 nfserr;
344
345 dprintk("nfsd: REMOVE %s %.*s\n", SVCFH_fmt(&argp->fh),
346 argp->len, argp->name);
347
348 /* Unlink. -SIFDIR means file must not be a directory */
349 nfserr = nfsd_unlink(rqstp, &argp->fh, -S_IFDIR, argp->name, argp->len);
350 fh_put(&argp->fh);
351 return nfserr;
352 }
353
354 static __be32
355 nfsd_proc_rename(struct svc_rqst *rqstp, struct nfsd_renameargs *argp,
356 void *resp)
357 {
358 __be32 nfserr;
359
360 dprintk("nfsd: RENAME %s %.*s -> \n",
361 SVCFH_fmt(&argp->ffh), argp->flen, argp->fname);
362 dprintk("nfsd: -> %s %.*s\n",
363 SVCFH_fmt(&argp->tfh), argp->tlen, argp->tname);
364
365 nfserr = nfsd_rename(rqstp, &argp->ffh, argp->fname, argp->flen,
366 &argp->tfh, argp->tname, argp->tlen);
367 fh_put(&argp->ffh);
368 fh_put(&argp->tfh);
369 return nfserr;
370 }
371
372 static __be32
373 nfsd_proc_link(struct svc_rqst *rqstp, struct nfsd_linkargs *argp,
374 void *resp)
375 {
376 __be32 nfserr;
377
378 dprintk("nfsd: LINK %s ->\n",
379 SVCFH_fmt(&argp->ffh));
380 dprintk("nfsd: %s %.*s\n",
381 SVCFH_fmt(&argp->tfh),
382 argp->tlen,
383 argp->tname);
384
385 nfserr = nfsd_link(rqstp, &argp->tfh, argp->tname, argp->tlen,
386 &argp->ffh);
387 fh_put(&argp->ffh);
388 fh_put(&argp->tfh);
389 return nfserr;
390 }
391
392 static __be32
393 nfsd_proc_symlink(struct svc_rqst *rqstp, struct nfsd_symlinkargs *argp,
394 void *resp)
395 {
396 struct svc_fh newfh;
397 __be32 nfserr;
398
399 dprintk("nfsd: SYMLINK %s %.*s -> %.*s\n",
400 SVCFH_fmt(&argp->ffh), argp->flen, argp->fname,
401 argp->tlen, argp->tname);
402
403 fh_init(&newfh, NFS_FHSIZE);
404 /*
405 * Create the link, look up new file and set attrs.
406 */
407 nfserr = nfsd_symlink(rqstp, &argp->ffh, argp->fname, argp->flen,
408 argp->tname, argp->tlen,
409 &newfh, &argp->attrs);
410
411
412 fh_put(&argp->ffh);
413 fh_put(&newfh);
414 return nfserr;
415 }
416
417 /*
418 * Make directory. This operation is not idempotent.
419 * N.B. After this call resp->fh needs an fh_put
420 */
421 static __be32
422 nfsd_proc_mkdir(struct svc_rqst *rqstp, struct nfsd_createargs *argp,
423 struct nfsd_diropres *resp)
424 {
425 __be32 nfserr;
426
427 dprintk("nfsd: MKDIR %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name);
428
429 if (resp->fh.fh_dentry) {
430 printk(KERN_WARNING
431 "nfsd_proc_mkdir: response already verified??\n");
432 }
433
434 argp->attrs.ia_valid &= ~ATTR_SIZE;
435 fh_init(&resp->fh, NFS_FHSIZE);
436 nfserr = nfsd_create(rqstp, &argp->fh, argp->name, argp->len,
437 &argp->attrs, S_IFDIR, 0, &resp->fh);
438 fh_put(&argp->fh);
439 return nfsd_return_dirop(nfserr, resp);
440 }
441
442 /*
443 * Remove a directory
444 */
445 static __be32
446 nfsd_proc_rmdir(struct svc_rqst *rqstp, struct nfsd_diropargs *argp,
447 void *resp)
448 {
449 __be32 nfserr;
450
451 dprintk("nfsd: RMDIR %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name);
452
453 nfserr = nfsd_unlink(rqstp, &argp->fh, S_IFDIR, argp->name, argp->len);
454 fh_put(&argp->fh);
455 return nfserr;
456 }
457
458 /*
459 * Read a portion of a directory.
460 */
461 static __be32
462 nfsd_proc_readdir(struct svc_rqst *rqstp, struct nfsd_readdirargs *argp,
463 struct nfsd_readdirres *resp)
464 {
465 int count;
466 __be32 nfserr;
467 loff_t offset;
468
469 dprintk("nfsd: READDIR %s %d bytes at %d\n",
470 SVCFH_fmt(&argp->fh),
471 argp->count, argp->cookie);
472
473 /* Shrink to the client read size */
474 count = (argp->count >> 2) - 2;
475
476 /* Make sure we've room for the NULL ptr & eof flag */
477 count -= 2;
478 if (count < 0)
479 count = 0;
480
481 resp->buffer = argp->buffer;
482 resp->offset = NULL;
483 resp->buflen = count;
484 resp->common.err = nfs_ok;
485 /* Read directory and encode entries on the fly */
486 offset = argp->cookie;
487 nfserr = nfsd_readdir(rqstp, &argp->fh, &offset,
488 &resp->common, nfssvc_encode_entry);
489
490 resp->count = resp->buffer - argp->buffer;
491 if (resp->offset)
492 *resp->offset = htonl(offset);
493
494 fh_put(&argp->fh);
495 return nfserr;
496 }
497
498 /*
499 * Get file system info
500 */
501 static __be32
502 nfsd_proc_statfs(struct svc_rqst * rqstp, struct nfsd_fhandle *argp,
503 struct nfsd_statfsres *resp)
504 {
505 __be32 nfserr;
506
507 dprintk("nfsd: STATFS %s\n", SVCFH_fmt(&argp->fh));
508
509 nfserr = nfsd_statfs(rqstp, &argp->fh, &resp->stats,
510 NFSD_MAY_BYPASS_GSS_ON_ROOT);
511 fh_put(&argp->fh);
512 return nfserr;
513 }
514
515 /*
516 * NFSv2 Server procedures.
517 * Only the results of non-idempotent operations are cached.
518 */
519 struct nfsd_void { int dummy; };
520
521 #define ST 1 /* status */
522 #define FH 8 /* filehandle */
523 #define AT 18 /* attributes */
524
525 static struct svc_procedure nfsd_procedures2[18] = {
526 [NFSPROC_NULL] = {
527 .pc_func = (svc_procfunc) nfsd_proc_null,
528 .pc_decode = (kxdrproc_t) nfssvc_decode_void,
529 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
530 .pc_argsize = sizeof(struct nfsd_void),
531 .pc_ressize = sizeof(struct nfsd_void),
532 .pc_cachetype = RC_NOCACHE,
533 .pc_xdrressize = ST,
534 },
535 [NFSPROC_GETATTR] = {
536 .pc_func = (svc_procfunc) nfsd_proc_getattr,
537 .pc_decode = (kxdrproc_t) nfssvc_decode_fhandle,
538 .pc_encode = (kxdrproc_t) nfssvc_encode_attrstat,
539 .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
540 .pc_argsize = sizeof(struct nfsd_fhandle),
541 .pc_ressize = sizeof(struct nfsd_attrstat),
542 .pc_cachetype = RC_NOCACHE,
543 .pc_xdrressize = ST+AT,
544 },
545 [NFSPROC_SETATTR] = {
546 .pc_func = (svc_procfunc) nfsd_proc_setattr,
547 .pc_decode = (kxdrproc_t) nfssvc_decode_sattrargs,
548 .pc_encode = (kxdrproc_t) nfssvc_encode_attrstat,
549 .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
550 .pc_argsize = sizeof(struct nfsd_sattrargs),
551 .pc_ressize = sizeof(struct nfsd_attrstat),
552 .pc_cachetype = RC_REPLBUFF,
553 .pc_xdrressize = ST+AT,
554 },
555 [NFSPROC_ROOT] = {
556 .pc_decode = (kxdrproc_t) nfssvc_decode_void,
557 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
558 .pc_argsize = sizeof(struct nfsd_void),
559 .pc_ressize = sizeof(struct nfsd_void),
560 .pc_cachetype = RC_NOCACHE,
561 .pc_xdrressize = ST,
562 },
563 [NFSPROC_LOOKUP] = {
564 .pc_func = (svc_procfunc) nfsd_proc_lookup,
565 .pc_decode = (kxdrproc_t) nfssvc_decode_diropargs,
566 .pc_encode = (kxdrproc_t) nfssvc_encode_diropres,
567 .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
568 .pc_argsize = sizeof(struct nfsd_diropargs),
569 .pc_ressize = sizeof(struct nfsd_diropres),
570 .pc_cachetype = RC_NOCACHE,
571 .pc_xdrressize = ST+FH+AT,
572 },
573 [NFSPROC_READLINK] = {
574 .pc_func = (svc_procfunc) nfsd_proc_readlink,
575 .pc_decode = (kxdrproc_t) nfssvc_decode_readlinkargs,
576 .pc_encode = (kxdrproc_t) nfssvc_encode_readlinkres,
577 .pc_argsize = sizeof(struct nfsd_readlinkargs),
578 .pc_ressize = sizeof(struct nfsd_readlinkres),
579 .pc_cachetype = RC_NOCACHE,
580 .pc_xdrressize = ST+1+NFS_MAXPATHLEN/4,
581 },
582 [NFSPROC_READ] = {
583 .pc_func = (svc_procfunc) nfsd_proc_read,
584 .pc_decode = (kxdrproc_t) nfssvc_decode_readargs,
585 .pc_encode = (kxdrproc_t) nfssvc_encode_readres,
586 .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
587 .pc_argsize = sizeof(struct nfsd_readargs),
588 .pc_ressize = sizeof(struct nfsd_readres),
589 .pc_cachetype = RC_NOCACHE,
590 .pc_xdrressize = ST+AT+1+NFSSVC_MAXBLKSIZE_V2/4,
591 },
592 [NFSPROC_WRITECACHE] = {
593 .pc_decode = (kxdrproc_t) nfssvc_decode_void,
594 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
595 .pc_argsize = sizeof(struct nfsd_void),
596 .pc_ressize = sizeof(struct nfsd_void),
597 .pc_cachetype = RC_NOCACHE,
598 .pc_xdrressize = ST,
599 },
600 [NFSPROC_WRITE] = {
601 .pc_func = (svc_procfunc) nfsd_proc_write,
602 .pc_decode = (kxdrproc_t) nfssvc_decode_writeargs,
603 .pc_encode = (kxdrproc_t) nfssvc_encode_attrstat,
604 .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
605 .pc_argsize = sizeof(struct nfsd_writeargs),
606 .pc_ressize = sizeof(struct nfsd_attrstat),
607 .pc_cachetype = RC_REPLBUFF,
608 .pc_xdrressize = ST+AT,
609 },
610 [NFSPROC_CREATE] = {
611 .pc_func = (svc_procfunc) nfsd_proc_create,
612 .pc_decode = (kxdrproc_t) nfssvc_decode_createargs,
613 .pc_encode = (kxdrproc_t) nfssvc_encode_diropres,
614 .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
615 .pc_argsize = sizeof(struct nfsd_createargs),
616 .pc_ressize = sizeof(struct nfsd_diropres),
617 .pc_cachetype = RC_REPLBUFF,
618 .pc_xdrressize = ST+FH+AT,
619 },
620 [NFSPROC_REMOVE] = {
621 .pc_func = (svc_procfunc) nfsd_proc_remove,
622 .pc_decode = (kxdrproc_t) nfssvc_decode_diropargs,
623 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
624 .pc_argsize = sizeof(struct nfsd_diropargs),
625 .pc_ressize = sizeof(struct nfsd_void),
626 .pc_cachetype = RC_REPLSTAT,
627 .pc_xdrressize = ST,
628 },
629 [NFSPROC_RENAME] = {
630 .pc_func = (svc_procfunc) nfsd_proc_rename,
631 .pc_decode = (kxdrproc_t) nfssvc_decode_renameargs,
632 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
633 .pc_argsize = sizeof(struct nfsd_renameargs),
634 .pc_ressize = sizeof(struct nfsd_void),
635 .pc_cachetype = RC_REPLSTAT,
636 .pc_xdrressize = ST,
637 },
638 [NFSPROC_LINK] = {
639 .pc_func = (svc_procfunc) nfsd_proc_link,
640 .pc_decode = (kxdrproc_t) nfssvc_decode_linkargs,
641 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
642 .pc_argsize = sizeof(struct nfsd_linkargs),
643 .pc_ressize = sizeof(struct nfsd_void),
644 .pc_cachetype = RC_REPLSTAT,
645 .pc_xdrressize = ST,
646 },
647 [NFSPROC_SYMLINK] = {
648 .pc_func = (svc_procfunc) nfsd_proc_symlink,
649 .pc_decode = (kxdrproc_t) nfssvc_decode_symlinkargs,
650 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
651 .pc_argsize = sizeof(struct nfsd_symlinkargs),
652 .pc_ressize = sizeof(struct nfsd_void),
653 .pc_cachetype = RC_REPLSTAT,
654 .pc_xdrressize = ST,
655 },
656 [NFSPROC_MKDIR] = {
657 .pc_func = (svc_procfunc) nfsd_proc_mkdir,
658 .pc_decode = (kxdrproc_t) nfssvc_decode_createargs,
659 .pc_encode = (kxdrproc_t) nfssvc_encode_diropres,
660 .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
661 .pc_argsize = sizeof(struct nfsd_createargs),
662 .pc_ressize = sizeof(struct nfsd_diropres),
663 .pc_cachetype = RC_REPLBUFF,
664 .pc_xdrressize = ST+FH+AT,
665 },
666 [NFSPROC_RMDIR] = {
667 .pc_func = (svc_procfunc) nfsd_proc_rmdir,
668 .pc_decode = (kxdrproc_t) nfssvc_decode_diropargs,
669 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
670 .pc_argsize = sizeof(struct nfsd_diropargs),
671 .pc_ressize = sizeof(struct nfsd_void),
672 .pc_cachetype = RC_REPLSTAT,
673 .pc_xdrressize = ST,
674 },
675 [NFSPROC_READDIR] = {
676 .pc_func = (svc_procfunc) nfsd_proc_readdir,
677 .pc_decode = (kxdrproc_t) nfssvc_decode_readdirargs,
678 .pc_encode = (kxdrproc_t) nfssvc_encode_readdirres,
679 .pc_argsize = sizeof(struct nfsd_readdirargs),
680 .pc_ressize = sizeof(struct nfsd_readdirres),
681 .pc_cachetype = RC_NOCACHE,
682 },
683 [NFSPROC_STATFS] = {
684 .pc_func = (svc_procfunc) nfsd_proc_statfs,
685 .pc_decode = (kxdrproc_t) nfssvc_decode_fhandle,
686 .pc_encode = (kxdrproc_t) nfssvc_encode_statfsres,
687 .pc_argsize = sizeof(struct nfsd_fhandle),
688 .pc_ressize = sizeof(struct nfsd_statfsres),
689 .pc_cachetype = RC_NOCACHE,
690 .pc_xdrressize = ST+5,
691 },
692 };
693
694
695 struct svc_version nfsd_version2 = {
696 .vs_vers = 2,
697 .vs_nproc = 18,
698 .vs_proc = nfsd_procedures2,
699 .vs_dispatch = nfsd_dispatch,
700 .vs_xdrsize = NFS2_SVC_XDRSIZE,
701 };
702
703 /*
704 * Map errnos to NFS errnos.
705 */
706 __be32
707 nfserrno (int errno)
708 {
709 static struct {
710 __be32 nfserr;
711 int syserr;
712 } nfs_errtbl[] = {
713 { nfs_ok, 0 },
714 { nfserr_perm, -EPERM },
715 { nfserr_noent, -ENOENT },
716 { nfserr_io, -EIO },
717 { nfserr_nxio, -ENXIO },
718 { nfserr_acces, -EACCES },
719 { nfserr_exist, -EEXIST },
720 { nfserr_xdev, -EXDEV },
721 { nfserr_mlink, -EMLINK },
722 { nfserr_nodev, -ENODEV },
723 { nfserr_notdir, -ENOTDIR },
724 { nfserr_isdir, -EISDIR },
725 { nfserr_inval, -EINVAL },
726 { nfserr_fbig, -EFBIG },
727 { nfserr_nospc, -ENOSPC },
728 { nfserr_rofs, -EROFS },
729 { nfserr_mlink, -EMLINK },
730 { nfserr_nametoolong, -ENAMETOOLONG },
731 { nfserr_notempty, -ENOTEMPTY },
732 #ifdef EDQUOT
733 { nfserr_dquot, -EDQUOT },
734 #endif
735 { nfserr_stale, -ESTALE },
736 { nfserr_jukebox, -ETIMEDOUT },
737 { nfserr_jukebox, -ERESTARTSYS },
738 { nfserr_jukebox, -EAGAIN },
739 { nfserr_jukebox, -EWOULDBLOCK },
740 { nfserr_jukebox, -ENOMEM },
741 { nfserr_io, -ETXTBSY },
742 { nfserr_notsupp, -EOPNOTSUPP },
743 { nfserr_toosmall, -ETOOSMALL },
744 { nfserr_serverfault, -ESERVERFAULT },
745 };
746 int i;
747
748 for (i = 0; i < ARRAY_SIZE(nfs_errtbl); i++) {
749 if (nfs_errtbl[i].syserr == errno)
750 return nfs_errtbl[i].nfserr;
751 }
752 printk (KERN_INFO "nfsd: non-standard errno: %d\n", errno);
753 return nfserr_io;
754 }
755