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
nfsd_proc_null(struct svc_rqst * rqstp,void * argp,void * resp)20 nfsd_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
21 {
22 return nfs_ok;
23 }
24
25 static __be32
nfsd_return_attrs(__be32 err,struct nfsd_attrstat * resp)26 nfsd_return_attrs(__be32 err, struct nfsd_attrstat *resp)
27 {
28 if (err) return err;
29 return fh_getattr(&resp->fh, &resp->stat);
30 }
31 static __be32
nfsd_return_dirop(__be32 err,struct nfsd_diropres * resp)32 nfsd_return_dirop(__be32 err, struct nfsd_diropres *resp)
33 {
34 if (err) return err;
35 return fh_getattr(&resp->fh, &resp->stat);
36 }
37 /*
38 * Get a file's attributes
39 * N.B. After this call resp->fh needs an fh_put
40 */
41 static __be32
nfsd_proc_getattr(struct svc_rqst * rqstp,struct nfsd_fhandle * argp,struct nfsd_attrstat * resp)42 nfsd_proc_getattr(struct svc_rqst *rqstp, struct nfsd_fhandle *argp,
43 struct nfsd_attrstat *resp)
44 {
45 __be32 nfserr;
46 dprintk("nfsd: GETATTR %s\n", SVCFH_fmt(&argp->fh));
47
48 fh_copy(&resp->fh, &argp->fh);
49 nfserr = fh_verify(rqstp, &resp->fh, 0,
50 NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT);
51 return nfsd_return_attrs(nfserr, resp);
52 }
53
54 /*
55 * Set a file's attributes
56 * N.B. After this call resp->fh needs an fh_put
57 */
58 static __be32
nfsd_proc_setattr(struct svc_rqst * rqstp,struct nfsd_sattrargs * argp,struct nfsd_attrstat * resp)59 nfsd_proc_setattr(struct svc_rqst *rqstp, struct nfsd_sattrargs *argp,
60 struct nfsd_attrstat *resp)
61 {
62 struct iattr *iap = &argp->attrs;
63 struct svc_fh *fhp;
64 __be32 nfserr;
65
66 dprintk("nfsd: SETATTR %s, valid=%x, size=%ld\n",
67 SVCFH_fmt(&argp->fh),
68 argp->attrs.ia_valid, (long) argp->attrs.ia_size);
69
70 fhp = fh_copy(&resp->fh, &argp->fh);
71
72 /*
73 * NFSv2 does not differentiate between "set-[ac]time-to-now"
74 * which only requires access, and "set-[ac]time-to-X" which
75 * requires ownership.
76 * So if it looks like it might be "set both to the same time which
77 * is close to now", and if inode_change_ok fails, then we
78 * convert to "set to now" instead of "set to explicit time"
79 *
80 * We only call inode_change_ok as the last test as technically
81 * it is not an interface that we should be using.
82 */
83 #define BOTH_TIME_SET (ATTR_ATIME_SET | ATTR_MTIME_SET)
84 #define MAX_TOUCH_TIME_ERROR (30*60)
85 if ((iap->ia_valid & BOTH_TIME_SET) == BOTH_TIME_SET &&
86 iap->ia_mtime.tv_sec == iap->ia_atime.tv_sec) {
87 /*
88 * Looks probable.
89 *
90 * Now just make sure time is in the right ballpark.
91 * Solaris, at least, doesn't seem to care what the time
92 * request is. We require it be within 30 minutes of now.
93 */
94 time_t delta = iap->ia_atime.tv_sec - get_seconds();
95 struct inode *inode;
96
97 nfserr = fh_verify(rqstp, fhp, 0, NFSD_MAY_NOP);
98 if (nfserr)
99 goto done;
100 inode = d_inode(fhp->fh_dentry);
101
102 if (delta < 0)
103 delta = -delta;
104 if (delta < MAX_TOUCH_TIME_ERROR &&
105 inode_change_ok(inode, iap) != 0) {
106 /*
107 * Turn off ATTR_[AM]TIME_SET but leave ATTR_[AM]TIME.
108 * This will cause notify_change to set these times
109 * to "now"
110 */
111 iap->ia_valid &= ~BOTH_TIME_SET;
112 }
113 }
114
115 nfserr = nfsd_setattr(rqstp, fhp, iap, 0, (time_t)0);
116 done:
117 return nfsd_return_attrs(nfserr, resp);
118 }
119
120 /*
121 * Look up a path name component
122 * Note: the dentry in the resp->fh may be negative if the file
123 * doesn't exist yet.
124 * N.B. After this call resp->fh needs an fh_put
125 */
126 static __be32
nfsd_proc_lookup(struct svc_rqst * rqstp,struct nfsd_diropargs * argp,struct nfsd_diropres * resp)127 nfsd_proc_lookup(struct svc_rqst *rqstp, struct nfsd_diropargs *argp,
128 struct nfsd_diropres *resp)
129 {
130 __be32 nfserr;
131
132 dprintk("nfsd: LOOKUP %s %.*s\n",
133 SVCFH_fmt(&argp->fh), argp->len, argp->name);
134
135 fh_init(&resp->fh, NFS_FHSIZE);
136 nfserr = nfsd_lookup(rqstp, &argp->fh, argp->name, argp->len,
137 &resp->fh);
138
139 fh_put(&argp->fh);
140 return nfsd_return_dirop(nfserr, resp);
141 }
142
143 /*
144 * Read a symlink.
145 */
146 static __be32
nfsd_proc_readlink(struct svc_rqst * rqstp,struct nfsd_readlinkargs * argp,struct nfsd_readlinkres * resp)147 nfsd_proc_readlink(struct svc_rqst *rqstp, struct nfsd_readlinkargs *argp,
148 struct nfsd_readlinkres *resp)
149 {
150 __be32 nfserr;
151
152 dprintk("nfsd: READLINK %s\n", SVCFH_fmt(&argp->fh));
153
154 /* Read the symlink. */
155 resp->len = NFS_MAXPATHLEN;
156 nfserr = nfsd_readlink(rqstp, &argp->fh, argp->buffer, &resp->len);
157
158 fh_put(&argp->fh);
159 return nfserr;
160 }
161
162 /*
163 * Read a portion of a file.
164 * N.B. After this call resp->fh needs an fh_put
165 */
166 static __be32
nfsd_proc_read(struct svc_rqst * rqstp,struct nfsd_readargs * argp,struct nfsd_readres * resp)167 nfsd_proc_read(struct svc_rqst *rqstp, struct nfsd_readargs *argp,
168 struct nfsd_readres *resp)
169 {
170 __be32 nfserr;
171
172 dprintk("nfsd: READ %s %d bytes at %d\n",
173 SVCFH_fmt(&argp->fh),
174 argp->count, argp->offset);
175
176 /* Obtain buffer pointer for payload. 19 is 1 word for
177 * status, 17 words for fattr, and 1 word for the byte count.
178 */
179
180 if (NFSSVC_MAXBLKSIZE_V2 < argp->count) {
181 char buf[RPC_MAX_ADDRBUFLEN];
182 printk(KERN_NOTICE
183 "oversized read request from %s (%d bytes)\n",
184 svc_print_addr(rqstp, buf, sizeof(buf)),
185 argp->count);
186 argp->count = NFSSVC_MAXBLKSIZE_V2;
187 }
188 svc_reserve_auth(rqstp, (19<<2) + argp->count + 4);
189
190 resp->count = argp->count;
191 nfserr = nfsd_read(rqstp, fh_copy(&resp->fh, &argp->fh),
192 argp->offset,
193 rqstp->rq_vec, argp->vlen,
194 &resp->count);
195
196 if (nfserr) return nfserr;
197 return fh_getattr(&resp->fh, &resp->stat);
198 }
199
200 /*
201 * Write data to a file
202 * N.B. After this call resp->fh needs an fh_put
203 */
204 static __be32
nfsd_proc_write(struct svc_rqst * rqstp,struct nfsd_writeargs * argp,struct nfsd_attrstat * resp)205 nfsd_proc_write(struct svc_rqst *rqstp, struct nfsd_writeargs *argp,
206 struct nfsd_attrstat *resp)
207 {
208 __be32 nfserr;
209 int stable = 1;
210 unsigned long cnt = argp->len;
211
212 dprintk("nfsd: WRITE %s %d bytes at %d\n",
213 SVCFH_fmt(&argp->fh),
214 argp->len, argp->offset);
215
216 nfserr = nfsd_write(rqstp, fh_copy(&resp->fh, &argp->fh), NULL,
217 argp->offset,
218 rqstp->rq_vec, argp->vlen,
219 &cnt,
220 &stable);
221 return nfsd_return_attrs(nfserr, resp);
222 }
223
224 /*
225 * CREATE processing is complicated. The keyword here is `overloaded.'
226 * The parent directory is kept locked between the check for existence
227 * and the actual create() call in compliance with VFS protocols.
228 * N.B. After this call _both_ argp->fh and resp->fh need an fh_put
229 */
230 static __be32
nfsd_proc_create(struct svc_rqst * rqstp,struct nfsd_createargs * argp,struct nfsd_diropres * resp)231 nfsd_proc_create(struct svc_rqst *rqstp, struct nfsd_createargs *argp,
232 struct nfsd_diropres *resp)
233 {
234 svc_fh *dirfhp = &argp->fh;
235 svc_fh *newfhp = &resp->fh;
236 struct iattr *attr = &argp->attrs;
237 struct inode *inode;
238 struct dentry *dchild;
239 int type, mode;
240 __be32 nfserr;
241 int hosterr;
242 dev_t rdev = 0, wanted = new_decode_dev(attr->ia_size);
243
244 dprintk("nfsd: CREATE %s %.*s\n",
245 SVCFH_fmt(dirfhp), argp->len, argp->name);
246
247 /* First verify the parent file handle */
248 nfserr = fh_verify(rqstp, dirfhp, S_IFDIR, NFSD_MAY_EXEC);
249 if (nfserr)
250 goto done; /* must fh_put dirfhp even on error */
251
252 /* Check for NFSD_MAY_WRITE in nfsd_create if necessary */
253
254 nfserr = nfserr_acces;
255 if (!argp->len)
256 goto done;
257 nfserr = nfserr_exist;
258 if (isdotent(argp->name, argp->len))
259 goto done;
260 hosterr = fh_want_write(dirfhp);
261 if (hosterr) {
262 nfserr = nfserrno(hosterr);
263 goto done;
264 }
265
266 fh_lock_nested(dirfhp, I_MUTEX_PARENT);
267 dchild = lookup_one_len(argp->name, dirfhp->fh_dentry, argp->len);
268 if (IS_ERR(dchild)) {
269 nfserr = nfserrno(PTR_ERR(dchild));
270 goto out_unlock;
271 }
272 fh_init(newfhp, NFS_FHSIZE);
273 nfserr = fh_compose(newfhp, dirfhp->fh_export, dchild, dirfhp);
274 if (!nfserr && d_really_is_negative(dchild))
275 nfserr = nfserr_noent;
276 dput(dchild);
277 if (nfserr) {
278 if (nfserr != nfserr_noent)
279 goto out_unlock;
280 /*
281 * If the new file handle wasn't verified, we can't tell
282 * whether the file exists or not. Time to bail ...
283 */
284 nfserr = nfserr_acces;
285 if (!newfhp->fh_dentry) {
286 printk(KERN_WARNING
287 "nfsd_proc_create: file handle not verified\n");
288 goto out_unlock;
289 }
290 }
291
292 inode = d_inode(newfhp->fh_dentry);
293
294 /* Unfudge the mode bits */
295 if (attr->ia_valid & ATTR_MODE) {
296 type = attr->ia_mode & S_IFMT;
297 mode = attr->ia_mode & ~S_IFMT;
298 if (!type) {
299 /* no type, so if target exists, assume same as that,
300 * else assume a file */
301 if (inode) {
302 type = inode->i_mode & S_IFMT;
303 switch(type) {
304 case S_IFCHR:
305 case S_IFBLK:
306 /* reserve rdev for later checking */
307 rdev = inode->i_rdev;
308 attr->ia_valid |= ATTR_SIZE;
309
310 /* FALLTHROUGH */
311 case S_IFIFO:
312 /* this is probably a permission check..
313 * at least IRIX implements perm checking on
314 * echo thing > device-special-file-or-pipe
315 * by doing a CREATE with type==0
316 */
317 nfserr = nfsd_permission(rqstp,
318 newfhp->fh_export,
319 newfhp->fh_dentry,
320 NFSD_MAY_WRITE|NFSD_MAY_LOCAL_ACCESS);
321 if (nfserr && nfserr != nfserr_rofs)
322 goto out_unlock;
323 }
324 } else
325 type = S_IFREG;
326 }
327 } else if (inode) {
328 type = inode->i_mode & S_IFMT;
329 mode = inode->i_mode & ~S_IFMT;
330 } else {
331 type = S_IFREG;
332 mode = 0; /* ??? */
333 }
334
335 attr->ia_valid |= ATTR_MODE;
336 attr->ia_mode = mode;
337
338 /* Special treatment for non-regular files according to the
339 * gospel of sun micro
340 */
341 if (type != S_IFREG) {
342 if (type != S_IFBLK && type != S_IFCHR) {
343 rdev = 0;
344 } else if (type == S_IFCHR && !(attr->ia_valid & ATTR_SIZE)) {
345 /* If you think you've seen the worst, grok this. */
346 type = S_IFIFO;
347 } else {
348 /* Okay, char or block special */
349 if (!rdev)
350 rdev = wanted;
351 }
352
353 /* we've used the SIZE information, so discard it */
354 attr->ia_valid &= ~ATTR_SIZE;
355
356 /* Make sure the type and device matches */
357 nfserr = nfserr_exist;
358 if (inode && type != (inode->i_mode & S_IFMT))
359 goto out_unlock;
360 }
361
362 nfserr = 0;
363 if (!inode) {
364 /* File doesn't exist. Create it and set attrs */
365 nfserr = nfsd_create(rqstp, dirfhp, argp->name, argp->len,
366 attr, type, rdev, newfhp);
367 } else if (type == S_IFREG) {
368 dprintk("nfsd: existing %s, valid=%x, size=%ld\n",
369 argp->name, attr->ia_valid, (long) attr->ia_size);
370 /* File already exists. We ignore all attributes except
371 * size, so that creat() behaves exactly like
372 * open(..., O_CREAT|O_TRUNC|O_WRONLY).
373 */
374 attr->ia_valid &= ATTR_SIZE;
375 if (attr->ia_valid)
376 nfserr = nfsd_setattr(rqstp, newfhp, attr, 0, (time_t)0);
377 }
378
379 out_unlock:
380 /* We don't really need to unlock, as fh_put does it. */
381 fh_unlock(dirfhp);
382 fh_drop_write(dirfhp);
383 done:
384 fh_put(dirfhp);
385 return nfsd_return_dirop(nfserr, resp);
386 }
387
388 static __be32
nfsd_proc_remove(struct svc_rqst * rqstp,struct nfsd_diropargs * argp,void * resp)389 nfsd_proc_remove(struct svc_rqst *rqstp, struct nfsd_diropargs *argp,
390 void *resp)
391 {
392 __be32 nfserr;
393
394 dprintk("nfsd: REMOVE %s %.*s\n", SVCFH_fmt(&argp->fh),
395 argp->len, argp->name);
396
397 /* Unlink. -SIFDIR means file must not be a directory */
398 nfserr = nfsd_unlink(rqstp, &argp->fh, -S_IFDIR, argp->name, argp->len);
399 fh_put(&argp->fh);
400 return nfserr;
401 }
402
403 static __be32
nfsd_proc_rename(struct svc_rqst * rqstp,struct nfsd_renameargs * argp,void * resp)404 nfsd_proc_rename(struct svc_rqst *rqstp, struct nfsd_renameargs *argp,
405 void *resp)
406 {
407 __be32 nfserr;
408
409 dprintk("nfsd: RENAME %s %.*s -> \n",
410 SVCFH_fmt(&argp->ffh), argp->flen, argp->fname);
411 dprintk("nfsd: -> %s %.*s\n",
412 SVCFH_fmt(&argp->tfh), argp->tlen, argp->tname);
413
414 nfserr = nfsd_rename(rqstp, &argp->ffh, argp->fname, argp->flen,
415 &argp->tfh, argp->tname, argp->tlen);
416 fh_put(&argp->ffh);
417 fh_put(&argp->tfh);
418 return nfserr;
419 }
420
421 static __be32
nfsd_proc_link(struct svc_rqst * rqstp,struct nfsd_linkargs * argp,void * resp)422 nfsd_proc_link(struct svc_rqst *rqstp, struct nfsd_linkargs *argp,
423 void *resp)
424 {
425 __be32 nfserr;
426
427 dprintk("nfsd: LINK %s ->\n",
428 SVCFH_fmt(&argp->ffh));
429 dprintk("nfsd: %s %.*s\n",
430 SVCFH_fmt(&argp->tfh),
431 argp->tlen,
432 argp->tname);
433
434 nfserr = nfsd_link(rqstp, &argp->tfh, argp->tname, argp->tlen,
435 &argp->ffh);
436 fh_put(&argp->ffh);
437 fh_put(&argp->tfh);
438 return nfserr;
439 }
440
441 static __be32
nfsd_proc_symlink(struct svc_rqst * rqstp,struct nfsd_symlinkargs * argp,void * resp)442 nfsd_proc_symlink(struct svc_rqst *rqstp, struct nfsd_symlinkargs *argp,
443 void *resp)
444 {
445 struct svc_fh newfh;
446 __be32 nfserr;
447
448 dprintk("nfsd: SYMLINK %s %.*s -> %.*s\n",
449 SVCFH_fmt(&argp->ffh), argp->flen, argp->fname,
450 argp->tlen, argp->tname);
451
452 fh_init(&newfh, NFS_FHSIZE);
453 /*
454 * Crazy hack: the request fits in a page, and already-decoded
455 * attributes follow argp->tname, so it's safe to just write a
456 * null to ensure it's null-terminated:
457 */
458 argp->tname[argp->tlen] = '\0';
459 nfserr = nfsd_symlink(rqstp, &argp->ffh, argp->fname, argp->flen,
460 argp->tname, &newfh);
461
462 fh_put(&argp->ffh);
463 fh_put(&newfh);
464 return nfserr;
465 }
466
467 /*
468 * Make directory. This operation is not idempotent.
469 * N.B. After this call resp->fh needs an fh_put
470 */
471 static __be32
nfsd_proc_mkdir(struct svc_rqst * rqstp,struct nfsd_createargs * argp,struct nfsd_diropres * resp)472 nfsd_proc_mkdir(struct svc_rqst *rqstp, struct nfsd_createargs *argp,
473 struct nfsd_diropres *resp)
474 {
475 __be32 nfserr;
476
477 dprintk("nfsd: MKDIR %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name);
478
479 if (resp->fh.fh_dentry) {
480 printk(KERN_WARNING
481 "nfsd_proc_mkdir: response already verified??\n");
482 }
483
484 argp->attrs.ia_valid &= ~ATTR_SIZE;
485 fh_init(&resp->fh, NFS_FHSIZE);
486 nfserr = nfsd_create(rqstp, &argp->fh, argp->name, argp->len,
487 &argp->attrs, S_IFDIR, 0, &resp->fh);
488 fh_put(&argp->fh);
489 return nfsd_return_dirop(nfserr, resp);
490 }
491
492 /*
493 * Remove a directory
494 */
495 static __be32
nfsd_proc_rmdir(struct svc_rqst * rqstp,struct nfsd_diropargs * argp,void * resp)496 nfsd_proc_rmdir(struct svc_rqst *rqstp, struct nfsd_diropargs *argp,
497 void *resp)
498 {
499 __be32 nfserr;
500
501 dprintk("nfsd: RMDIR %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name);
502
503 nfserr = nfsd_unlink(rqstp, &argp->fh, S_IFDIR, argp->name, argp->len);
504 fh_put(&argp->fh);
505 return nfserr;
506 }
507
508 /*
509 * Read a portion of a directory.
510 */
511 static __be32
nfsd_proc_readdir(struct svc_rqst * rqstp,struct nfsd_readdirargs * argp,struct nfsd_readdirres * resp)512 nfsd_proc_readdir(struct svc_rqst *rqstp, struct nfsd_readdirargs *argp,
513 struct nfsd_readdirres *resp)
514 {
515 int count;
516 __be32 nfserr;
517 loff_t offset;
518
519 dprintk("nfsd: READDIR %s %d bytes at %d\n",
520 SVCFH_fmt(&argp->fh),
521 argp->count, argp->cookie);
522
523 /* Shrink to the client read size */
524 count = (argp->count >> 2) - 2;
525
526 /* Make sure we've room for the NULL ptr & eof flag */
527 count -= 2;
528 if (count < 0)
529 count = 0;
530
531 resp->buffer = argp->buffer;
532 resp->offset = NULL;
533 resp->buflen = count;
534 resp->common.err = nfs_ok;
535 /* Read directory and encode entries on the fly */
536 offset = argp->cookie;
537 nfserr = nfsd_readdir(rqstp, &argp->fh, &offset,
538 &resp->common, nfssvc_encode_entry);
539
540 resp->count = resp->buffer - argp->buffer;
541 if (resp->offset)
542 *resp->offset = htonl(offset);
543
544 fh_put(&argp->fh);
545 return nfserr;
546 }
547
548 /*
549 * Get file system info
550 */
551 static __be32
nfsd_proc_statfs(struct svc_rqst * rqstp,struct nfsd_fhandle * argp,struct nfsd_statfsres * resp)552 nfsd_proc_statfs(struct svc_rqst * rqstp, struct nfsd_fhandle *argp,
553 struct nfsd_statfsres *resp)
554 {
555 __be32 nfserr;
556
557 dprintk("nfsd: STATFS %s\n", SVCFH_fmt(&argp->fh));
558
559 nfserr = nfsd_statfs(rqstp, &argp->fh, &resp->stats,
560 NFSD_MAY_BYPASS_GSS_ON_ROOT);
561 fh_put(&argp->fh);
562 return nfserr;
563 }
564
565 /*
566 * NFSv2 Server procedures.
567 * Only the results of non-idempotent operations are cached.
568 */
569 struct nfsd_void { int dummy; };
570
571 #define ST 1 /* status */
572 #define FH 8 /* filehandle */
573 #define AT 18 /* attributes */
574
575 static struct svc_procedure nfsd_procedures2[18] = {
576 [NFSPROC_NULL] = {
577 .pc_func = (svc_procfunc) nfsd_proc_null,
578 .pc_decode = (kxdrproc_t) nfssvc_decode_void,
579 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
580 .pc_argsize = sizeof(struct nfsd_void),
581 .pc_ressize = sizeof(struct nfsd_void),
582 .pc_cachetype = RC_NOCACHE,
583 .pc_xdrressize = ST,
584 },
585 [NFSPROC_GETATTR] = {
586 .pc_func = (svc_procfunc) nfsd_proc_getattr,
587 .pc_decode = (kxdrproc_t) nfssvc_decode_fhandle,
588 .pc_encode = (kxdrproc_t) nfssvc_encode_attrstat,
589 .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
590 .pc_argsize = sizeof(struct nfsd_fhandle),
591 .pc_ressize = sizeof(struct nfsd_attrstat),
592 .pc_cachetype = RC_NOCACHE,
593 .pc_xdrressize = ST+AT,
594 },
595 [NFSPROC_SETATTR] = {
596 .pc_func = (svc_procfunc) nfsd_proc_setattr,
597 .pc_decode = (kxdrproc_t) nfssvc_decode_sattrargs,
598 .pc_encode = (kxdrproc_t) nfssvc_encode_attrstat,
599 .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
600 .pc_argsize = sizeof(struct nfsd_sattrargs),
601 .pc_ressize = sizeof(struct nfsd_attrstat),
602 .pc_cachetype = RC_REPLBUFF,
603 .pc_xdrressize = ST+AT,
604 },
605 [NFSPROC_ROOT] = {
606 .pc_decode = (kxdrproc_t) nfssvc_decode_void,
607 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
608 .pc_argsize = sizeof(struct nfsd_void),
609 .pc_ressize = sizeof(struct nfsd_void),
610 .pc_cachetype = RC_NOCACHE,
611 .pc_xdrressize = ST,
612 },
613 [NFSPROC_LOOKUP] = {
614 .pc_func = (svc_procfunc) nfsd_proc_lookup,
615 .pc_decode = (kxdrproc_t) nfssvc_decode_diropargs,
616 .pc_encode = (kxdrproc_t) nfssvc_encode_diropres,
617 .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
618 .pc_argsize = sizeof(struct nfsd_diropargs),
619 .pc_ressize = sizeof(struct nfsd_diropres),
620 .pc_cachetype = RC_NOCACHE,
621 .pc_xdrressize = ST+FH+AT,
622 },
623 [NFSPROC_READLINK] = {
624 .pc_func = (svc_procfunc) nfsd_proc_readlink,
625 .pc_decode = (kxdrproc_t) nfssvc_decode_readlinkargs,
626 .pc_encode = (kxdrproc_t) nfssvc_encode_readlinkres,
627 .pc_argsize = sizeof(struct nfsd_readlinkargs),
628 .pc_ressize = sizeof(struct nfsd_readlinkres),
629 .pc_cachetype = RC_NOCACHE,
630 .pc_xdrressize = ST+1+NFS_MAXPATHLEN/4,
631 },
632 [NFSPROC_READ] = {
633 .pc_func = (svc_procfunc) nfsd_proc_read,
634 .pc_decode = (kxdrproc_t) nfssvc_decode_readargs,
635 .pc_encode = (kxdrproc_t) nfssvc_encode_readres,
636 .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
637 .pc_argsize = sizeof(struct nfsd_readargs),
638 .pc_ressize = sizeof(struct nfsd_readres),
639 .pc_cachetype = RC_NOCACHE,
640 .pc_xdrressize = ST+AT+1+NFSSVC_MAXBLKSIZE_V2/4,
641 },
642 [NFSPROC_WRITECACHE] = {
643 .pc_decode = (kxdrproc_t) nfssvc_decode_void,
644 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
645 .pc_argsize = sizeof(struct nfsd_void),
646 .pc_ressize = sizeof(struct nfsd_void),
647 .pc_cachetype = RC_NOCACHE,
648 .pc_xdrressize = ST,
649 },
650 [NFSPROC_WRITE] = {
651 .pc_func = (svc_procfunc) nfsd_proc_write,
652 .pc_decode = (kxdrproc_t) nfssvc_decode_writeargs,
653 .pc_encode = (kxdrproc_t) nfssvc_encode_attrstat,
654 .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
655 .pc_argsize = sizeof(struct nfsd_writeargs),
656 .pc_ressize = sizeof(struct nfsd_attrstat),
657 .pc_cachetype = RC_REPLBUFF,
658 .pc_xdrressize = ST+AT,
659 },
660 [NFSPROC_CREATE] = {
661 .pc_func = (svc_procfunc) nfsd_proc_create,
662 .pc_decode = (kxdrproc_t) nfssvc_decode_createargs,
663 .pc_encode = (kxdrproc_t) nfssvc_encode_diropres,
664 .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
665 .pc_argsize = sizeof(struct nfsd_createargs),
666 .pc_ressize = sizeof(struct nfsd_diropres),
667 .pc_cachetype = RC_REPLBUFF,
668 .pc_xdrressize = ST+FH+AT,
669 },
670 [NFSPROC_REMOVE] = {
671 .pc_func = (svc_procfunc) nfsd_proc_remove,
672 .pc_decode = (kxdrproc_t) nfssvc_decode_diropargs,
673 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
674 .pc_argsize = sizeof(struct nfsd_diropargs),
675 .pc_ressize = sizeof(struct nfsd_void),
676 .pc_cachetype = RC_REPLSTAT,
677 .pc_xdrressize = ST,
678 },
679 [NFSPROC_RENAME] = {
680 .pc_func = (svc_procfunc) nfsd_proc_rename,
681 .pc_decode = (kxdrproc_t) nfssvc_decode_renameargs,
682 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
683 .pc_argsize = sizeof(struct nfsd_renameargs),
684 .pc_ressize = sizeof(struct nfsd_void),
685 .pc_cachetype = RC_REPLSTAT,
686 .pc_xdrressize = ST,
687 },
688 [NFSPROC_LINK] = {
689 .pc_func = (svc_procfunc) nfsd_proc_link,
690 .pc_decode = (kxdrproc_t) nfssvc_decode_linkargs,
691 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
692 .pc_argsize = sizeof(struct nfsd_linkargs),
693 .pc_ressize = sizeof(struct nfsd_void),
694 .pc_cachetype = RC_REPLSTAT,
695 .pc_xdrressize = ST,
696 },
697 [NFSPROC_SYMLINK] = {
698 .pc_func = (svc_procfunc) nfsd_proc_symlink,
699 .pc_decode = (kxdrproc_t) nfssvc_decode_symlinkargs,
700 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
701 .pc_argsize = sizeof(struct nfsd_symlinkargs),
702 .pc_ressize = sizeof(struct nfsd_void),
703 .pc_cachetype = RC_REPLSTAT,
704 .pc_xdrressize = ST,
705 },
706 [NFSPROC_MKDIR] = {
707 .pc_func = (svc_procfunc) nfsd_proc_mkdir,
708 .pc_decode = (kxdrproc_t) nfssvc_decode_createargs,
709 .pc_encode = (kxdrproc_t) nfssvc_encode_diropres,
710 .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
711 .pc_argsize = sizeof(struct nfsd_createargs),
712 .pc_ressize = sizeof(struct nfsd_diropres),
713 .pc_cachetype = RC_REPLBUFF,
714 .pc_xdrressize = ST+FH+AT,
715 },
716 [NFSPROC_RMDIR] = {
717 .pc_func = (svc_procfunc) nfsd_proc_rmdir,
718 .pc_decode = (kxdrproc_t) nfssvc_decode_diropargs,
719 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
720 .pc_argsize = sizeof(struct nfsd_diropargs),
721 .pc_ressize = sizeof(struct nfsd_void),
722 .pc_cachetype = RC_REPLSTAT,
723 .pc_xdrressize = ST,
724 },
725 [NFSPROC_READDIR] = {
726 .pc_func = (svc_procfunc) nfsd_proc_readdir,
727 .pc_decode = (kxdrproc_t) nfssvc_decode_readdirargs,
728 .pc_encode = (kxdrproc_t) nfssvc_encode_readdirres,
729 .pc_argsize = sizeof(struct nfsd_readdirargs),
730 .pc_ressize = sizeof(struct nfsd_readdirres),
731 .pc_cachetype = RC_NOCACHE,
732 },
733 [NFSPROC_STATFS] = {
734 .pc_func = (svc_procfunc) nfsd_proc_statfs,
735 .pc_decode = (kxdrproc_t) nfssvc_decode_fhandle,
736 .pc_encode = (kxdrproc_t) nfssvc_encode_statfsres,
737 .pc_argsize = sizeof(struct nfsd_fhandle),
738 .pc_ressize = sizeof(struct nfsd_statfsres),
739 .pc_cachetype = RC_NOCACHE,
740 .pc_xdrressize = ST+5,
741 },
742 };
743
744
745 struct svc_version nfsd_version2 = {
746 .vs_vers = 2,
747 .vs_nproc = 18,
748 .vs_proc = nfsd_procedures2,
749 .vs_dispatch = nfsd_dispatch,
750 .vs_xdrsize = NFS2_SVC_XDRSIZE,
751 };
752
753 /*
754 * Map errnos to NFS errnos.
755 */
756 __be32
nfserrno(int errno)757 nfserrno (int errno)
758 {
759 static struct {
760 __be32 nfserr;
761 int syserr;
762 } nfs_errtbl[] = {
763 { nfs_ok, 0 },
764 { nfserr_perm, -EPERM },
765 { nfserr_noent, -ENOENT },
766 { nfserr_io, -EIO },
767 { nfserr_nxio, -ENXIO },
768 { nfserr_fbig, -E2BIG },
769 { nfserr_acces, -EACCES },
770 { nfserr_exist, -EEXIST },
771 { nfserr_xdev, -EXDEV },
772 { nfserr_mlink, -EMLINK },
773 { nfserr_nodev, -ENODEV },
774 { nfserr_notdir, -ENOTDIR },
775 { nfserr_isdir, -EISDIR },
776 { nfserr_inval, -EINVAL },
777 { nfserr_fbig, -EFBIG },
778 { nfserr_nospc, -ENOSPC },
779 { nfserr_rofs, -EROFS },
780 { nfserr_mlink, -EMLINK },
781 { nfserr_nametoolong, -ENAMETOOLONG },
782 { nfserr_notempty, -ENOTEMPTY },
783 #ifdef EDQUOT
784 { nfserr_dquot, -EDQUOT },
785 #endif
786 { nfserr_stale, -ESTALE },
787 { nfserr_jukebox, -ETIMEDOUT },
788 { nfserr_jukebox, -ERESTARTSYS },
789 { nfserr_jukebox, -EAGAIN },
790 { nfserr_jukebox, -EWOULDBLOCK },
791 { nfserr_jukebox, -ENOMEM },
792 { nfserr_io, -ETXTBSY },
793 { nfserr_notsupp, -EOPNOTSUPP },
794 { nfserr_toosmall, -ETOOSMALL },
795 { nfserr_serverfault, -ESERVERFAULT },
796 { nfserr_serverfault, -ENFILE },
797 };
798 int i;
799
800 for (i = 0; i < ARRAY_SIZE(nfs_errtbl); i++) {
801 if (nfs_errtbl[i].syserr == errno)
802 return nfs_errtbl[i].nfserr;
803 }
804 WARN(1, "nfsd: non-standard errno: %d\n", errno);
805 return nfserr_io;
806 }
807
808