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x86/amd-iommu: Add per IOMMU reference counting
[linux/fpc-iii.git] / fs / nfsd / nfsproc.c
blob0eb9c820b7a6282340df2f840f5e8ed86dcdff0e
1 /*
2 * nfsproc2.c Process version 2 NFS requests.
3 * linux/fs/nfsd/nfs2proc.c
4 *
5 * Process version 2 NFS requests.
6 *
7 * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
8 */
9
10 #include <linux/linkage.h>
11 #include <linux/time.h>
12 #include <linux/errno.h>
13 #include <linux/fs.h>
14 #include <linux/stat.h>
15 #include <linux/fcntl.h>
16 #include <linux/net.h>
17 #include <linux/in.h>
18 #include <linux/namei.h>
19 #include <linux/unistd.h>
20 #include <linux/slab.h>
21
22 #include <linux/sunrpc/clnt.h>
23 #include <linux/sunrpc/svc.h>
24 #include <linux/nfsd/nfsd.h>
25 #include <linux/nfsd/cache.h>
26 #include <linux/nfsd/xdr.h>
27
28 typedef struct svc_rqst svc_rqst;
29 typedef struct svc_buf svc_buf;
30
31 #define NFSDDBG_FACILITY NFSDDBG_PROC
32
33
34 static __be32
35 nfsd_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
36 {
37 return nfs_ok;
38 }
39
40 static __be32
41 nfsd_return_attrs(__be32 err, struct nfsd_attrstat *resp)
42 {
43 if (err) return err;
44 return nfserrno(vfs_getattr(resp->fh.fh_export->ex_path.mnt,
45 resp->fh.fh_dentry,
46 &resp->stat));
47 }
48 static __be32
49 nfsd_return_dirop(__be32 err, struct nfsd_diropres *resp)
50 {
51 if (err) return err;
52 return nfserrno(vfs_getattr(resp->fh.fh_export->ex_path.mnt,
53 resp->fh.fh_dentry,
54 &resp->stat));
55 }
56 /*
57 * Get a file's attributes
58 * N.B. After this call resp->fh needs an fh_put
59 */
60 static __be32
61 nfsd_proc_getattr(struct svc_rqst *rqstp, struct nfsd_fhandle *argp,
62 struct nfsd_attrstat *resp)
63 {
64 __be32 nfserr;
65 dprintk("nfsd: GETATTR %s\n", SVCFH_fmt(&argp->fh));
66
67 fh_copy(&resp->fh, &argp->fh);
68 nfserr = fh_verify(rqstp, &resp->fh, 0,
69 NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT);
70 return nfsd_return_attrs(nfserr, resp);
71 }
72
73 /*
74 * Set a file's attributes
75 * N.B. After this call resp->fh needs an fh_put
76 */
77 static __be32
78 nfsd_proc_setattr(struct svc_rqst *rqstp, struct nfsd_sattrargs *argp,
79 struct nfsd_attrstat *resp)
80 {
81 __be32 nfserr;
82 dprintk("nfsd: SETATTR %s, valid=%x, size=%ld\n",
83 SVCFH_fmt(&argp->fh),
84 argp->attrs.ia_valid, (long) argp->attrs.ia_size);
85
86 fh_copy(&resp->fh, &argp->fh);
87 nfserr = nfsd_setattr(rqstp, &resp->fh, &argp->attrs,0, (time_t)0);
88 return nfsd_return_attrs(nfserr, resp);
89 }
90
91 /*
92 * Look up a path name component
93 * Note: the dentry in the resp->fh may be negative if the file
94 * doesn't exist yet.
95 * N.B. After this call resp->fh needs an fh_put
96 */
97 static __be32
98 nfsd_proc_lookup(struct svc_rqst *rqstp, struct nfsd_diropargs *argp,
99 struct nfsd_diropres *resp)
100 {
101 __be32 nfserr;
102
103 dprintk("nfsd: LOOKUP %s %.*s\n",
104 SVCFH_fmt(&argp->fh), argp->len, argp->name);
105
106 fh_init(&resp->fh, NFS_FHSIZE);
107 nfserr = nfsd_lookup(rqstp, &argp->fh, argp->name, argp->len,
108 &resp->fh);
109
110 fh_put(&argp->fh);
111 return nfsd_return_dirop(nfserr, resp);
112 }
113
114 /*
115 * Read a symlink.
116 */
117 static __be32
118 nfsd_proc_readlink(struct svc_rqst *rqstp, struct nfsd_readlinkargs *argp,
119 struct nfsd_readlinkres *resp)
120 {
121 __be32 nfserr;
122
123 dprintk("nfsd: READLINK %s\n", SVCFH_fmt(&argp->fh));
124
125 /* Read the symlink. */
126 resp->len = NFS_MAXPATHLEN;
127 nfserr = nfsd_readlink(rqstp, &argp->fh, argp->buffer, &resp->len);
128
129 fh_put(&argp->fh);
130 return nfserr;
131 }
132
133 /*
134 * Read a portion of a file.
135 * N.B. After this call resp->fh needs an fh_put
136 */
137 static __be32
138 nfsd_proc_read(struct svc_rqst *rqstp, struct nfsd_readargs *argp,
139 struct nfsd_readres *resp)
140 {
141 __be32 nfserr;
142
143 dprintk("nfsd: READ %s %d bytes at %d\n",
144 SVCFH_fmt(&argp->fh),
145 argp->count, argp->offset);
146
147 /* Obtain buffer pointer for payload. 19 is 1 word for
148 * status, 17 words for fattr, and 1 word for the byte count.
149 */
150
151 if (NFSSVC_MAXBLKSIZE_V2 < argp->count) {
152 char buf[RPC_MAX_ADDRBUFLEN];
153 printk(KERN_NOTICE
154 "oversized read request from %s (%d bytes)\n",
155 svc_print_addr(rqstp, buf, sizeof(buf)),
156 argp->count);
157 argp->count = NFSSVC_MAXBLKSIZE_V2;
158 }
159 svc_reserve_auth(rqstp, (19<<2) + argp->count + 4);
160
161 resp->count = argp->count;
162 nfserr = nfsd_read(rqstp, fh_copy(&resp->fh, &argp->fh), NULL,
163 argp->offset,
164 rqstp->rq_vec, argp->vlen,
165 &resp->count);
166
167 if (nfserr) return nfserr;
168 return nfserrno(vfs_getattr(resp->fh.fh_export->ex_path.mnt,
169 resp->fh.fh_dentry,
170 &resp->stat));
171 }
172
173 /*
174 * Write data to a file
175 * N.B. After this call resp->fh needs an fh_put
176 */
177 static __be32
178 nfsd_proc_write(struct svc_rqst *rqstp, struct nfsd_writeargs *argp,
179 struct nfsd_attrstat *resp)
180 {
181 __be32 nfserr;
182 int stable = 1;
183 unsigned long cnt = argp->len;
184
185 dprintk("nfsd: WRITE %s %d bytes at %d\n",
186 SVCFH_fmt(&argp->fh),
187 argp->len, argp->offset);
188
189 nfserr = nfsd_write(rqstp, fh_copy(&resp->fh, &argp->fh), NULL,
190 argp->offset,
191 rqstp->rq_vec, argp->vlen,
192 &cnt,
193 &stable);
194 return nfsd_return_attrs(nfserr, resp);
195 }
196
197 /*
198 * CREATE processing is complicated. The keyword here is `overloaded.'
199 * The parent directory is kept locked between the check for existence
200 * and the actual create() call in compliance with VFS protocols.
201 * N.B. After this call _both_ argp->fh and resp->fh need an fh_put
202 */
203 static __be32
204 nfsd_proc_create(struct svc_rqst *rqstp, struct nfsd_createargs *argp,
205 struct nfsd_diropres *resp)
206 {
207 svc_fh *dirfhp = &argp->fh;
208 svc_fh *newfhp = &resp->fh;
209 struct iattr *attr = &argp->attrs;
210 struct inode *inode;
211 struct dentry *dchild;
212 int type, mode;
213 __be32 nfserr;
214 dev_t rdev = 0, wanted = new_decode_dev(attr->ia_size);
215
216 dprintk("nfsd: CREATE %s %.*s\n",
217 SVCFH_fmt(dirfhp), argp->len, argp->name);
218
219 /* First verify the parent file handle */
220 nfserr = fh_verify(rqstp, dirfhp, S_IFDIR, NFSD_MAY_EXEC);
221 if (nfserr)
222 goto done; /* must fh_put dirfhp even on error */
223
224 /* Check for NFSD_MAY_WRITE in nfsd_create if necessary */
225
226 nfserr = nfserr_acces;
227 if (!argp->len)
228 goto done;
229 nfserr = nfserr_exist;
230 if (isdotent(argp->name, argp->len))
231 goto done;
232 fh_lock_nested(dirfhp, I_MUTEX_PARENT);
233 dchild = lookup_one_len(argp->name, dirfhp->fh_dentry, argp->len);
234 if (IS_ERR(dchild)) {
235 nfserr = nfserrno(PTR_ERR(dchild));
236 goto out_unlock;
237 }
238 fh_init(newfhp, NFS_FHSIZE);
239 nfserr = fh_compose(newfhp, dirfhp->fh_export, dchild, dirfhp);
240 if (!nfserr && !dchild->d_inode)
241 nfserr = nfserr_noent;
242 dput(dchild);
243 if (nfserr) {
244 if (nfserr != nfserr_noent)
245 goto out_unlock;
246 /*
247 * If the new file handle wasn't verified, we can't tell
248 * whether the file exists or not. Time to bail ...
249 */
250 nfserr = nfserr_acces;
251 if (!newfhp->fh_dentry) {
252 printk(KERN_WARNING
253 "nfsd_proc_create: file handle not verified\n");
254 goto out_unlock;
255 }
256 }
257
258 inode = newfhp->fh_dentry->d_inode;
259
260 /* Unfudge the mode bits */
261 if (attr->ia_valid & ATTR_MODE) {
262 type = attr->ia_mode & S_IFMT;
263 mode = attr->ia_mode & ~S_IFMT;
264 if (!type) {
265 /* no type, so if target exists, assume same as that,
266 * else assume a file */
267 if (inode) {
268 type = inode->i_mode & S_IFMT;
269 switch(type) {
270 case S_IFCHR:
271 case S_IFBLK:
272 /* reserve rdev for later checking */
273 rdev = inode->i_rdev;
274 attr->ia_valid |= ATTR_SIZE;
275
276 /* FALLTHROUGH */
277 case S_IFIFO:
278 /* this is probably a permission check..
279 * at least IRIX implements perm checking on
280 * echo thing > device-special-file-or-pipe
281 * by doing a CREATE with type==0
282 */
283 nfserr = nfsd_permission(rqstp,
284 newfhp->fh_export,
285 newfhp->fh_dentry,
286 NFSD_MAY_WRITE|NFSD_MAY_LOCAL_ACCESS);
287 if (nfserr && nfserr != nfserr_rofs)
288 goto out_unlock;
289 }
290 } else
291 type = S_IFREG;
292 }
293 } else if (inode) {
294 type = inode->i_mode & S_IFMT;
295 mode = inode->i_mode & ~S_IFMT;
296 } else {
297 type = S_IFREG;
298 mode = 0; /* ??? */
299 }
300
301 attr->ia_valid |= ATTR_MODE;
302 attr->ia_mode = mode;
303
304 /* Special treatment for non-regular files according to the
305 * gospel of sun micro
306 */
307 if (type != S_IFREG) {
308 int is_borc = 0;
309 if (type != S_IFBLK && type != S_IFCHR) {
310 rdev = 0;
311 } else if (type == S_IFCHR && !(attr->ia_valid & ATTR_SIZE)) {
312 /* If you think you've seen the worst, grok this. */
313 type = S_IFIFO;
314 } else {
315 /* Okay, char or block special */
316 is_borc = 1;
317 if (!rdev)
318 rdev = wanted;
319 }
320
321 /* we've used the SIZE information, so discard it */
322 attr->ia_valid &= ~ATTR_SIZE;
323
324 /* Make sure the type and device matches */
325 nfserr = nfserr_exist;
326 if (inode && type != (inode->i_mode & S_IFMT))
327 goto out_unlock;
328 }
329
330 nfserr = 0;
331 if (!inode) {
332 /* File doesn't exist. Create it and set attrs */
333 nfserr = nfsd_create(rqstp, dirfhp, argp->name, argp->len,
334 attr, type, rdev, newfhp);
335 } else if (type == S_IFREG) {
336 dprintk("nfsd: existing %s, valid=%x, size=%ld\n",
337 argp->name, attr->ia_valid, (long) attr->ia_size);
338 /* File already exists. We ignore all attributes except
339 * size, so that creat() behaves exactly like
340 * open(..., O_CREAT|O_TRUNC|O_WRONLY).
341 */
342 attr->ia_valid &= ATTR_SIZE;
343 if (attr->ia_valid)
344 nfserr = nfsd_setattr(rqstp, newfhp, attr, 0, (time_t)0);
345 }
346
347 out_unlock:
348 /* We don't really need to unlock, as fh_put does it. */
349 fh_unlock(dirfhp);
350
351 done:
352 fh_put(dirfhp);
353 return nfsd_return_dirop(nfserr, resp);
354 }
355
356 static __be32
357 nfsd_proc_remove(struct svc_rqst *rqstp, struct nfsd_diropargs *argp,
358 void *resp)
359 {
360 __be32 nfserr;
361
362 dprintk("nfsd: REMOVE %s %.*s\n", SVCFH_fmt(&argp->fh),
363 argp->len, argp->name);
364
365 /* Unlink. -SIFDIR means file must not be a directory */
366 nfserr = nfsd_unlink(rqstp, &argp->fh, -S_IFDIR, argp->name, argp->len);
367 fh_put(&argp->fh);
368 return nfserr;
369 }
370
371 static __be32
372 nfsd_proc_rename(struct svc_rqst *rqstp, struct nfsd_renameargs *argp,
373 void *resp)
374 {
375 __be32 nfserr;
376
377 dprintk("nfsd: RENAME %s %.*s -> \n",
378 SVCFH_fmt(&argp->ffh), argp->flen, argp->fname);
379 dprintk("nfsd: -> %s %.*s\n",
380 SVCFH_fmt(&argp->tfh), argp->tlen, argp->tname);
381
382 nfserr = nfsd_rename(rqstp, &argp->ffh, argp->fname, argp->flen,
383 &argp->tfh, argp->tname, argp->tlen);
384 fh_put(&argp->ffh);
385 fh_put(&argp->tfh);
386 return nfserr;
387 }
388
389 static __be32
390 nfsd_proc_link(struct svc_rqst *rqstp, struct nfsd_linkargs *argp,
391 void *resp)
392 {
393 __be32 nfserr;
394
395 dprintk("nfsd: LINK %s ->\n",
396 SVCFH_fmt(&argp->ffh));
397 dprintk("nfsd: %s %.*s\n",
398 SVCFH_fmt(&argp->tfh),
399 argp->tlen,
400 argp->tname);
401
402 nfserr = nfsd_link(rqstp, &argp->tfh, argp->tname, argp->tlen,
403 &argp->ffh);
404 fh_put(&argp->ffh);
405 fh_put(&argp->tfh);
406 return nfserr;
407 }
408
409 static __be32
410 nfsd_proc_symlink(struct svc_rqst *rqstp, struct nfsd_symlinkargs *argp,
411 void *resp)
412 {
413 struct svc_fh newfh;
414 __be32 nfserr;
415
416 dprintk("nfsd: SYMLINK %s %.*s -> %.*s\n",
417 SVCFH_fmt(&argp->ffh), argp->flen, argp->fname,
418 argp->tlen, argp->tname);
419
420 fh_init(&newfh, NFS_FHSIZE);
421 /*
422 * Create the link, look up new file and set attrs.
423 */
424 nfserr = nfsd_symlink(rqstp, &argp->ffh, argp->fname, argp->flen,
425 argp->tname, argp->tlen,
426 &newfh, &argp->attrs);
427
428
429 fh_put(&argp->ffh);
430 fh_put(&newfh);
431 return nfserr;
432 }
433
434 /*
435 * Make directory. This operation is not idempotent.
436 * N.B. After this call resp->fh needs an fh_put
437 */
438 static __be32
439 nfsd_proc_mkdir(struct svc_rqst *rqstp, struct nfsd_createargs *argp,
440 struct nfsd_diropres *resp)
441 {
442 __be32 nfserr;
443
444 dprintk("nfsd: MKDIR %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name);
445
446 if (resp->fh.fh_dentry) {
447 printk(KERN_WARNING
448 "nfsd_proc_mkdir: response already verified??\n");
449 }
450
451 argp->attrs.ia_valid &= ~ATTR_SIZE;
452 fh_init(&resp->fh, NFS_FHSIZE);
453 nfserr = nfsd_create(rqstp, &argp->fh, argp->name, argp->len,
454 &argp->attrs, S_IFDIR, 0, &resp->fh);
455 fh_put(&argp->fh);
456 return nfsd_return_dirop(nfserr, resp);
457 }
458
459 /*
460 * Remove a directory
461 */
462 static __be32
463 nfsd_proc_rmdir(struct svc_rqst *rqstp, struct nfsd_diropargs *argp,
464 void *resp)
465 {
466 __be32 nfserr;
467
468 dprintk("nfsd: RMDIR %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name);
469
470 nfserr = nfsd_unlink(rqstp, &argp->fh, S_IFDIR, argp->name, argp->len);
471 fh_put(&argp->fh);
472 return nfserr;
473 }
474
475 /*
476 * Read a portion of a directory.
477 */
478 static __be32
479 nfsd_proc_readdir(struct svc_rqst *rqstp, struct nfsd_readdirargs *argp,
480 struct nfsd_readdirres *resp)
481 {
482 int count;
483 __be32 nfserr;
484 loff_t offset;
485
486 dprintk("nfsd: READDIR %s %d bytes at %d\n",
487 SVCFH_fmt(&argp->fh),
488 argp->count, argp->cookie);
489
490 /* Shrink to the client read size */
491 count = (argp->count >> 2) - 2;
492
493 /* Make sure we've room for the NULL ptr & eof flag */
494 count -= 2;
495 if (count < 0)
496 count = 0;
497
498 resp->buffer = argp->buffer;
499 resp->offset = NULL;
500 resp->buflen = count;
501 resp->common.err = nfs_ok;
502 /* Read directory and encode entries on the fly */
503 offset = argp->cookie;
504 nfserr = nfsd_readdir(rqstp, &argp->fh, &offset,
505 &resp->common, nfssvc_encode_entry);
506
507 resp->count = resp->buffer - argp->buffer;
508 if (resp->offset)
509 *resp->offset = htonl(offset);
510
511 fh_put(&argp->fh);
512 return nfserr;
513 }
514
515 /*
516 * Get file system info
517 */
518 static __be32
519 nfsd_proc_statfs(struct svc_rqst * rqstp, struct nfsd_fhandle *argp,
520 struct nfsd_statfsres *resp)
521 {
522 __be32 nfserr;
523
524 dprintk("nfsd: STATFS %s\n", SVCFH_fmt(&argp->fh));
525
526 nfserr = nfsd_statfs(rqstp, &argp->fh, &resp->stats,
527 NFSD_MAY_BYPASS_GSS_ON_ROOT);
528 fh_put(&argp->fh);
529 return nfserr;
530 }
531
532 /*
533 * NFSv2 Server procedures.
534 * Only the results of non-idempotent operations are cached.
535 */
536 struct nfsd_void { int dummy; };
537
538 #define ST 1 /* status */
539 #define FH 8 /* filehandle */
540 #define AT 18 /* attributes */
541
542 static struct svc_procedure nfsd_procedures2[18] = {
543 [NFSPROC_NULL] = {
544 .pc_func = (svc_procfunc) nfsd_proc_null,
545 .pc_decode = (kxdrproc_t) nfssvc_decode_void,
546 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
547 .pc_argsize = sizeof(struct nfsd_void),
548 .pc_ressize = sizeof(struct nfsd_void),
549 .pc_cachetype = RC_NOCACHE,
550 .pc_xdrressize = ST,
551 },
552 [NFSPROC_GETATTR] = {
553 .pc_func = (svc_procfunc) nfsd_proc_getattr,
554 .pc_decode = (kxdrproc_t) nfssvc_decode_fhandle,
555 .pc_encode = (kxdrproc_t) nfssvc_encode_attrstat,
556 .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
557 .pc_argsize = sizeof(struct nfsd_fhandle),
558 .pc_ressize = sizeof(struct nfsd_attrstat),
559 .pc_cachetype = RC_NOCACHE,
560 .pc_xdrressize = ST+AT,
561 },
562 [NFSPROC_SETATTR] = {
563 .pc_func = (svc_procfunc) nfsd_proc_setattr,
564 .pc_decode = (kxdrproc_t) nfssvc_decode_sattrargs,
565 .pc_encode = (kxdrproc_t) nfssvc_encode_attrstat,
566 .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
567 .pc_argsize = sizeof(struct nfsd_sattrargs),
568 .pc_ressize = sizeof(struct nfsd_attrstat),
569 .pc_cachetype = RC_REPLBUFF,
570 .pc_xdrressize = ST+AT,
571 },
572 [NFSPROC_ROOT] = {
573 .pc_decode = (kxdrproc_t) nfssvc_decode_void,
574 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
575 .pc_argsize = sizeof(struct nfsd_void),
576 .pc_ressize = sizeof(struct nfsd_void),
577 .pc_cachetype = RC_NOCACHE,
578 .pc_xdrressize = ST,
579 },
580 [NFSPROC_LOOKUP] = {
581 .pc_func = (svc_procfunc) nfsd_proc_lookup,
582 .pc_decode = (kxdrproc_t) nfssvc_decode_diropargs,
583 .pc_encode = (kxdrproc_t) nfssvc_encode_diropres,
584 .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
585 .pc_argsize = sizeof(struct nfsd_diropargs),
586 .pc_ressize = sizeof(struct nfsd_diropres),
587 .pc_cachetype = RC_NOCACHE,
588 .pc_xdrressize = ST+FH+AT,
589 },
590 [NFSPROC_READLINK] = {
591 .pc_func = (svc_procfunc) nfsd_proc_readlink,
592 .pc_decode = (kxdrproc_t) nfssvc_decode_readlinkargs,
593 .pc_encode = (kxdrproc_t) nfssvc_encode_readlinkres,
594 .pc_argsize = sizeof(struct nfsd_readlinkargs),
595 .pc_ressize = sizeof(struct nfsd_readlinkres),
596 .pc_cachetype = RC_NOCACHE,
597 .pc_xdrressize = ST+1+NFS_MAXPATHLEN/4,
598 },
599 [NFSPROC_READ] = {
600 .pc_func = (svc_procfunc) nfsd_proc_read,
601 .pc_decode = (kxdrproc_t) nfssvc_decode_readargs,
602 .pc_encode = (kxdrproc_t) nfssvc_encode_readres,
603 .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
604 .pc_argsize = sizeof(struct nfsd_readargs),
605 .pc_ressize = sizeof(struct nfsd_readres),
606 .pc_cachetype = RC_NOCACHE,
607 .pc_xdrressize = ST+AT+1+NFSSVC_MAXBLKSIZE_V2/4,
608 },
609 [NFSPROC_WRITECACHE] = {
610 .pc_decode = (kxdrproc_t) nfssvc_decode_void,
611 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
612 .pc_argsize = sizeof(struct nfsd_void),
613 .pc_ressize = sizeof(struct nfsd_void),
614 .pc_cachetype = RC_NOCACHE,
615 .pc_xdrressize = ST,
616 },
617 [NFSPROC_WRITE] = {
618 .pc_func = (svc_procfunc) nfsd_proc_write,
619 .pc_decode = (kxdrproc_t) nfssvc_decode_writeargs,
620 .pc_encode = (kxdrproc_t) nfssvc_encode_attrstat,
621 .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
622 .pc_argsize = sizeof(struct nfsd_writeargs),
623 .pc_ressize = sizeof(struct nfsd_attrstat),
624 .pc_cachetype = RC_REPLBUFF,
625 .pc_xdrressize = ST+AT,
626 },
627 [NFSPROC_CREATE] = {
628 .pc_func = (svc_procfunc) nfsd_proc_create,
629 .pc_decode = (kxdrproc_t) nfssvc_decode_createargs,
630 .pc_encode = (kxdrproc_t) nfssvc_encode_diropres,
631 .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
632 .pc_argsize = sizeof(struct nfsd_createargs),
633 .pc_ressize = sizeof(struct nfsd_diropres),
634 .pc_cachetype = RC_REPLBUFF,
635 .pc_xdrressize = ST+FH+AT,
636 },
637 [NFSPROC_REMOVE] = {
638 .pc_func = (svc_procfunc) nfsd_proc_remove,
639 .pc_decode = (kxdrproc_t) nfssvc_decode_diropargs,
640 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
641 .pc_argsize = sizeof(struct nfsd_diropargs),
642 .pc_ressize = sizeof(struct nfsd_void),
643 .pc_cachetype = RC_REPLSTAT,
644 .pc_xdrressize = ST,
645 },
646 [NFSPROC_RENAME] = {
647 .pc_func = (svc_procfunc) nfsd_proc_rename,
648 .pc_decode = (kxdrproc_t) nfssvc_decode_renameargs,
649 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
650 .pc_argsize = sizeof(struct nfsd_renameargs),
651 .pc_ressize = sizeof(struct nfsd_void),
652 .pc_cachetype = RC_REPLSTAT,
653 .pc_xdrressize = ST,
654 },
655 [NFSPROC_LINK] = {
656 .pc_func = (svc_procfunc) nfsd_proc_link,
657 .pc_decode = (kxdrproc_t) nfssvc_decode_linkargs,
658 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
659 .pc_argsize = sizeof(struct nfsd_linkargs),
660 .pc_ressize = sizeof(struct nfsd_void),
661 .pc_cachetype = RC_REPLSTAT,
662 .pc_xdrressize = ST,
663 },
664 [NFSPROC_SYMLINK] = {
665 .pc_func = (svc_procfunc) nfsd_proc_symlink,
666 .pc_decode = (kxdrproc_t) nfssvc_decode_symlinkargs,
667 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
668 .pc_argsize = sizeof(struct nfsd_symlinkargs),
669 .pc_ressize = sizeof(struct nfsd_void),
670 .pc_cachetype = RC_REPLSTAT,
671 .pc_xdrressize = ST,
672 },
673 [NFSPROC_MKDIR] = {
674 .pc_func = (svc_procfunc) nfsd_proc_mkdir,
675 .pc_decode = (kxdrproc_t) nfssvc_decode_createargs,
676 .pc_encode = (kxdrproc_t) nfssvc_encode_diropres,
677 .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
678 .pc_argsize = sizeof(struct nfsd_createargs),
679 .pc_ressize = sizeof(struct nfsd_diropres),
680 .pc_cachetype = RC_REPLBUFF,
681 .pc_xdrressize = ST+FH+AT,
682 },
683 [NFSPROC_RMDIR] = {
684 .pc_func = (svc_procfunc) nfsd_proc_rmdir,
685 .pc_decode = (kxdrproc_t) nfssvc_decode_diropargs,
686 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
687 .pc_argsize = sizeof(struct nfsd_diropargs),
688 .pc_ressize = sizeof(struct nfsd_void),
689 .pc_cachetype = RC_REPLSTAT,
690 .pc_xdrressize = ST,
691 },
692 [NFSPROC_READDIR] = {
693 .pc_func = (svc_procfunc) nfsd_proc_readdir,
694 .pc_decode = (kxdrproc_t) nfssvc_decode_readdirargs,
695 .pc_encode = (kxdrproc_t) nfssvc_encode_readdirres,
696 .pc_argsize = sizeof(struct nfsd_readdirargs),
697 .pc_ressize = sizeof(struct nfsd_readdirres),
698 .pc_cachetype = RC_NOCACHE,
699 },
700 [NFSPROC_STATFS] = {
701 .pc_func = (svc_procfunc) nfsd_proc_statfs,
702 .pc_decode = (kxdrproc_t) nfssvc_decode_fhandle,
703 .pc_encode = (kxdrproc_t) nfssvc_encode_statfsres,
704 .pc_argsize = sizeof(struct nfsd_fhandle),
705 .pc_ressize = sizeof(struct nfsd_statfsres),
706 .pc_cachetype = RC_NOCACHE,
707 .pc_xdrressize = ST+5,
708 },
709 };
710
711
712 struct svc_version nfsd_version2 = {
713 .vs_vers = 2,
714 .vs_nproc = 18,
715 .vs_proc = nfsd_procedures2,
716 .vs_dispatch = nfsd_dispatch,
717 .vs_xdrsize = NFS2_SVC_XDRSIZE,
718 };
719
720 /*
721 * Map errnos to NFS errnos.
722 */
723 __be32
724 nfserrno (int errno)
725 {
726 static struct {
727 __be32 nfserr;
728 int syserr;
729 } nfs_errtbl[] = {
730 { nfs_ok, 0 },
731 { nfserr_perm, -EPERM },
732 { nfserr_noent, -ENOENT },
733 { nfserr_io, -EIO },
734 { nfserr_nxio, -ENXIO },
735 { nfserr_acces, -EACCES },
736 { nfserr_exist, -EEXIST },
737 { nfserr_xdev, -EXDEV },
738 { nfserr_mlink, -EMLINK },
739 { nfserr_nodev, -ENODEV },
740 { nfserr_notdir, -ENOTDIR },
741 { nfserr_isdir, -EISDIR },
742 { nfserr_inval, -EINVAL },
743 { nfserr_fbig, -EFBIG },
744 { nfserr_nospc, -ENOSPC },
745 { nfserr_rofs, -EROFS },
746 { nfserr_mlink, -EMLINK },
747 { nfserr_nametoolong, -ENAMETOOLONG },
748 { nfserr_notempty, -ENOTEMPTY },
749 #ifdef EDQUOT
750 { nfserr_dquot, -EDQUOT },
751 #endif
752 { nfserr_stale, -ESTALE },
753 { nfserr_jukebox, -ETIMEDOUT },
754 { nfserr_jukebox, -ERESTARTSYS },
755 { nfserr_dropit, -EAGAIN },
756 { nfserr_dropit, -ENOMEM },
757 { nfserr_badname, -ESRCH },
758 { nfserr_io, -ETXTBSY },
759 { nfserr_notsupp, -EOPNOTSUPP },
760 { nfserr_toosmall, -ETOOSMALL },
761 };
762 int i;
763
764 for (i = 0; i < ARRAY_SIZE(nfs_errtbl); i++) {
765 if (nfs_errtbl[i].syserr == errno)
766 return nfs_errtbl[i].nfserr;
767 }
768 printk (KERN_INFO "nfsd: non-standard errno: %d\n", errno);
769 return nfserr_io;
770 }
771
Linux with added FPC-III support