]> git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blame - fs/nfsd/nfsproc.c
nfsd: only WARN once on unmapped errors
[mirror_ubuntu-artful-kernel.git] / fs / nfsd / nfsproc.c
CommitLineData
1da177e4 1/*
1da177e4
LT
2 * Process version 2 NFS requests.
3 *
4 * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
5 */
6
1da177e4 7#include <linux/namei.h>
1da177e4 8
9a74af21
BH
9#include "cache.h"
10#include "xdr.h"
0a3adade 11#include "vfs.h"
1da177e4
LT
12
13typedef struct svc_rqst svc_rqst;
14typedef struct svc_buf svc_buf;
15
16#define NFSDDBG_FACILITY NFSDDBG_PROC
17
18
7111c66e 19static __be32
1da177e4
LT
20nfsd_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
21{
22 return nfs_ok;
23}
24
c4d987ba
AV
25static __be32
26nfsd_return_attrs(__be32 err, struct nfsd_attrstat *resp)
846f2fcd
DS
27{
28 if (err) return err;
3dadecce 29 return fh_getattr(&resp->fh, &resp->stat);
846f2fcd 30}
c4d987ba
AV
31static __be32
32nfsd_return_dirop(__be32 err, struct nfsd_diropres *resp)
846f2fcd
DS
33{
34 if (err) return err;
3dadecce 35 return fh_getattr(&resp->fh, &resp->stat);
846f2fcd 36}
1da177e4
LT
37/*
38 * Get a file's attributes
39 * N.B. After this call resp->fh needs an fh_put
40 */
7111c66e 41static __be32
1da177e4
LT
42nfsd_proc_getattr(struct svc_rqst *rqstp, struct nfsd_fhandle *argp,
43 struct nfsd_attrstat *resp)
44{
c4d987ba 45 __be32 nfserr;
1da177e4
LT
46 dprintk("nfsd: GETATTR %s\n", SVCFH_fmt(&argp->fh));
47
48 fh_copy(&resp->fh, &argp->fh);
04716e66
BF
49 nfserr = fh_verify(rqstp, &resp->fh, 0,
50 NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT);
846f2fcd 51 return nfsd_return_attrs(nfserr, resp);
1da177e4
LT
52}
53
54/*
55 * Set a file's attributes
56 * N.B. After this call resp->fh needs an fh_put
57 */
7111c66e 58static __be32
1da177e4
LT
59nfsd_proc_setattr(struct svc_rqst *rqstp, struct nfsd_sattrargs *argp,
60 struct nfsd_attrstat *resp)
61{
cc265089
AG
62 struct iattr *iap = &argp->attrs;
63 struct svc_fh *fhp;
c4d987ba 64 __be32 nfserr;
cc265089 65
1da177e4
LT
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
cc265089
AG
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);
116done:
846f2fcd 117 return nfsd_return_attrs(nfserr, resp);
1da177e4
LT
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 */
7111c66e 126static __be32
1da177e4
LT
127nfsd_proc_lookup(struct svc_rqst *rqstp, struct nfsd_diropargs *argp,
128 struct nfsd_diropres *resp)
129{
c4d987ba 130 __be32 nfserr;
1da177e4
LT
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);
846f2fcd 140 return nfsd_return_dirop(nfserr, resp);
1da177e4
LT
141}
142
143/*
144 * Read a symlink.
145 */
7111c66e 146static __be32
1da177e4
LT
147nfsd_proc_readlink(struct svc_rqst *rqstp, struct nfsd_readlinkargs *argp,
148 struct nfsd_readlinkres *resp)
149{
c4d987ba 150 __be32 nfserr;
1da177e4
LT
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 */
7111c66e 166static __be32
1da177e4
LT
167nfsd_proc_read(struct svc_rqst *rqstp, struct nfsd_readargs *argp,
168 struct nfsd_readres *resp)
169{
c4d987ba 170 __be32 nfserr;
1da177e4
LT
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
7adae489 180 if (NFSSVC_MAXBLKSIZE_V2 < argp->count) {
ad06e4bd 181 char buf[RPC_MAX_ADDRBUFLEN];
1da177e4 182 printk(KERN_NOTICE
ad06e4bd
CL
183 "oversized read request from %s (%d bytes)\n",
184 svc_print_addr(rqstp, buf, sizeof(buf)),
1da177e4 185 argp->count);
7adae489 186 argp->count = NFSSVC_MAXBLKSIZE_V2;
1da177e4 187 }
cd123012 188 svc_reserve_auth(rqstp, (19<<2) + argp->count + 4);
1da177e4
LT
189
190 resp->count = argp->count;
039a87ca 191 nfserr = nfsd_read(rqstp, fh_copy(&resp->fh, &argp->fh),
1da177e4 192 argp->offset,
3cc03b16 193 rqstp->rq_vec, argp->vlen,
1da177e4
LT
194 &resp->count);
195
846f2fcd 196 if (nfserr) return nfserr;
3dadecce 197 return fh_getattr(&resp->fh, &resp->stat);
1da177e4
LT
198}
199
200/*
201 * Write data to a file
202 * N.B. After this call resp->fh needs an fh_put
203 */
7111c66e 204static __be32
1da177e4
LT
205nfsd_proc_write(struct svc_rqst *rqstp, struct nfsd_writeargs *argp,
206 struct nfsd_attrstat *resp)
207{
c4d987ba 208 __be32 nfserr;
1da177e4 209 int stable = 1;
31dec253 210 unsigned long cnt = argp->len;
1da177e4
LT
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,
3cc03b16 218 rqstp->rq_vec, argp->vlen,
31dec253 219 &cnt,
1da177e4 220 &stable);
846f2fcd 221 return nfsd_return_attrs(nfserr, resp);
1da177e4
LT
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 */
7111c66e 230static __be32
1da177e4
LT
231nfsd_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;
c4d987ba
AV
239 int type, mode;
240 __be32 nfserr;
4a55c101 241 int hosterr;
1da177e4
LT
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 */
8837abca 248 nfserr = fh_verify(rqstp, dirfhp, S_IFDIR, NFSD_MAY_EXEC);
1da177e4
LT
249 if (nfserr)
250 goto done; /* must fh_put dirfhp even on error */
251
8837abca 252 /* Check for NFSD_MAY_WRITE in nfsd_create if necessary */
1da177e4 253
1da177e4
LT
254 nfserr = nfserr_exist;
255 if (isdotent(argp->name, argp->len))
256 goto done;
4a55c101
JK
257 hosterr = fh_want_write(dirfhp);
258 if (hosterr) {
259 nfserr = nfserrno(hosterr);
260 goto done;
261 }
262
7ed94296 263 fh_lock_nested(dirfhp, I_MUTEX_PARENT);
1da177e4
LT
264 dchild = lookup_one_len(argp->name, dirfhp->fh_dentry, argp->len);
265 if (IS_ERR(dchild)) {
266 nfserr = nfserrno(PTR_ERR(dchild));
267 goto out_unlock;
268 }
269 fh_init(newfhp, NFS_FHSIZE);
270 nfserr = fh_compose(newfhp, dirfhp->fh_export, dchild, dirfhp);
2b0143b5 271 if (!nfserr && d_really_is_negative(dchild))
1da177e4
LT
272 nfserr = nfserr_noent;
273 dput(dchild);
274 if (nfserr) {
275 if (nfserr != nfserr_noent)
276 goto out_unlock;
277 /*
278 * If the new file handle wasn't verified, we can't tell
279 * whether the file exists or not. Time to bail ...
280 */
281 nfserr = nfserr_acces;
282 if (!newfhp->fh_dentry) {
283 printk(KERN_WARNING
284 "nfsd_proc_create: file handle not verified\n");
285 goto out_unlock;
286 }
287 }
288
2b0143b5 289 inode = d_inode(newfhp->fh_dentry);
1da177e4
LT
290
291 /* Unfudge the mode bits */
292 if (attr->ia_valid & ATTR_MODE) {
293 type = attr->ia_mode & S_IFMT;
294 mode = attr->ia_mode & ~S_IFMT;
295 if (!type) {
296 /* no type, so if target exists, assume same as that,
297 * else assume a file */
298 if (inode) {
299 type = inode->i_mode & S_IFMT;
300 switch(type) {
301 case S_IFCHR:
302 case S_IFBLK:
303 /* reserve rdev for later checking */
304 rdev = inode->i_rdev;
305 attr->ia_valid |= ATTR_SIZE;
306
307 /* FALLTHROUGH */
308 case S_IFIFO:
309 /* this is probably a permission check..
310 * at least IRIX implements perm checking on
311 * echo thing > device-special-file-or-pipe
312 * by doing a CREATE with type==0
313 */
0ec757df
BF
314 nfserr = nfsd_permission(rqstp,
315 newfhp->fh_export,
1da177e4 316 newfhp->fh_dentry,
8837abca 317 NFSD_MAY_WRITE|NFSD_MAY_LOCAL_ACCESS);
1da177e4
LT
318 if (nfserr && nfserr != nfserr_rofs)
319 goto out_unlock;
320 }
321 } else
322 type = S_IFREG;
323 }
324 } else if (inode) {
325 type = inode->i_mode & S_IFMT;
326 mode = inode->i_mode & ~S_IFMT;
327 } else {
328 type = S_IFREG;
329 mode = 0; /* ??? */
330 }
331
332 attr->ia_valid |= ATTR_MODE;
333 attr->ia_mode = mode;
334
335 /* Special treatment for non-regular files according to the
336 * gospel of sun micro
337 */
338 if (type != S_IFREG) {
1da177e4
LT
339 if (type != S_IFBLK && type != S_IFCHR) {
340 rdev = 0;
341 } else if (type == S_IFCHR && !(attr->ia_valid & ATTR_SIZE)) {
342 /* If you think you've seen the worst, grok this. */
343 type = S_IFIFO;
344 } else {
345 /* Okay, char or block special */
1da177e4
LT
346 if (!rdev)
347 rdev = wanted;
348 }
349
350 /* we've used the SIZE information, so discard it */
351 attr->ia_valid &= ~ATTR_SIZE;
352
353 /* Make sure the type and device matches */
354 nfserr = nfserr_exist;
355 if (inode && type != (inode->i_mode & S_IFMT))
356 goto out_unlock;
357 }
358
359 nfserr = 0;
360 if (!inode) {
361 /* File doesn't exist. Create it and set attrs */
b44061d0
BF
362 nfserr = nfsd_create_locked(rqstp, dirfhp, argp->name,
363 argp->len, attr, type, rdev, newfhp);
1da177e4
LT
364 } else if (type == S_IFREG) {
365 dprintk("nfsd: existing %s, valid=%x, size=%ld\n",
366 argp->name, attr->ia_valid, (long) attr->ia_size);
367 /* File already exists. We ignore all attributes except
368 * size, so that creat() behaves exactly like
369 * open(..., O_CREAT|O_TRUNC|O_WRONLY).
370 */
371 attr->ia_valid &= ATTR_SIZE;
372 if (attr->ia_valid)
373 nfserr = nfsd_setattr(rqstp, newfhp, attr, 0, (time_t)0);
374 }
375
376out_unlock:
377 /* We don't really need to unlock, as fh_put does it. */
378 fh_unlock(dirfhp);
4a55c101 379 fh_drop_write(dirfhp);
1da177e4
LT
380done:
381 fh_put(dirfhp);
846f2fcd 382 return nfsd_return_dirop(nfserr, resp);
1da177e4
LT
383}
384
7111c66e 385static __be32
1da177e4
LT
386nfsd_proc_remove(struct svc_rqst *rqstp, struct nfsd_diropargs *argp,
387 void *resp)
388{
c4d987ba 389 __be32 nfserr;
1da177e4
LT
390
391 dprintk("nfsd: REMOVE %s %.*s\n", SVCFH_fmt(&argp->fh),
392 argp->len, argp->name);
393
394 /* Unlink. -SIFDIR means file must not be a directory */
395 nfserr = nfsd_unlink(rqstp, &argp->fh, -S_IFDIR, argp->name, argp->len);
396 fh_put(&argp->fh);
397 return nfserr;
398}
399
7111c66e 400static __be32
1da177e4
LT
401nfsd_proc_rename(struct svc_rqst *rqstp, struct nfsd_renameargs *argp,
402 void *resp)
403{
c4d987ba 404 __be32 nfserr;
1da177e4
LT
405
406 dprintk("nfsd: RENAME %s %.*s -> \n",
407 SVCFH_fmt(&argp->ffh), argp->flen, argp->fname);
408 dprintk("nfsd: -> %s %.*s\n",
409 SVCFH_fmt(&argp->tfh), argp->tlen, argp->tname);
410
411 nfserr = nfsd_rename(rqstp, &argp->ffh, argp->fname, argp->flen,
412 &argp->tfh, argp->tname, argp->tlen);
413 fh_put(&argp->ffh);
414 fh_put(&argp->tfh);
415 return nfserr;
416}
417
7111c66e 418static __be32
1da177e4
LT
419nfsd_proc_link(struct svc_rqst *rqstp, struct nfsd_linkargs *argp,
420 void *resp)
421{
c4d987ba 422 __be32 nfserr;
1da177e4
LT
423
424 dprintk("nfsd: LINK %s ->\n",
425 SVCFH_fmt(&argp->ffh));
426 dprintk("nfsd: %s %.*s\n",
427 SVCFH_fmt(&argp->tfh),
428 argp->tlen,
429 argp->tname);
430
431 nfserr = nfsd_link(rqstp, &argp->tfh, argp->tname, argp->tlen,
432 &argp->ffh);
433 fh_put(&argp->ffh);
434 fh_put(&argp->tfh);
435 return nfserr;
436}
437
7111c66e 438static __be32
1da177e4
LT
439nfsd_proc_symlink(struct svc_rqst *rqstp, struct nfsd_symlinkargs *argp,
440 void *resp)
441{
442 struct svc_fh newfh;
c4d987ba 443 __be32 nfserr;
1da177e4
LT
444
445 dprintk("nfsd: SYMLINK %s %.*s -> %.*s\n",
446 SVCFH_fmt(&argp->ffh), argp->flen, argp->fname,
447 argp->tlen, argp->tname);
448
449 fh_init(&newfh, NFS_FHSIZE);
450 /*
0aeae33f
BF
451 * Crazy hack: the request fits in a page, and already-decoded
452 * attributes follow argp->tname, so it's safe to just write a
453 * null to ensure it's null-terminated:
1da177e4 454 */
0aeae33f 455 argp->tname[argp->tlen] = '\0';
1da177e4 456 nfserr = nfsd_symlink(rqstp, &argp->ffh, argp->fname, argp->flen,
1e444f5b 457 argp->tname, &newfh);
1da177e4
LT
458
459 fh_put(&argp->ffh);
460 fh_put(&newfh);
461 return nfserr;
462}
463
464/*
465 * Make directory. This operation is not idempotent.
466 * N.B. After this call resp->fh needs an fh_put
467 */
7111c66e 468static __be32
1da177e4
LT
469nfsd_proc_mkdir(struct svc_rqst *rqstp, struct nfsd_createargs *argp,
470 struct nfsd_diropres *resp)
471{
c4d987ba 472 __be32 nfserr;
1da177e4
LT
473
474 dprintk("nfsd: MKDIR %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name);
475
476 if (resp->fh.fh_dentry) {
477 printk(KERN_WARNING
478 "nfsd_proc_mkdir: response already verified??\n");
479 }
480
481 argp->attrs.ia_valid &= ~ATTR_SIZE;
482 fh_init(&resp->fh, NFS_FHSIZE);
483 nfserr = nfsd_create(rqstp, &argp->fh, argp->name, argp->len,
484 &argp->attrs, S_IFDIR, 0, &resp->fh);
485 fh_put(&argp->fh);
846f2fcd 486 return nfsd_return_dirop(nfserr, resp);
1da177e4
LT
487}
488
489/*
490 * Remove a directory
491 */
7111c66e 492static __be32
1da177e4
LT
493nfsd_proc_rmdir(struct svc_rqst *rqstp, struct nfsd_diropargs *argp,
494 void *resp)
495{
c4d987ba 496 __be32 nfserr;
1da177e4
LT
497
498 dprintk("nfsd: RMDIR %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name);
499
500 nfserr = nfsd_unlink(rqstp, &argp->fh, S_IFDIR, argp->name, argp->len);
501 fh_put(&argp->fh);
502 return nfserr;
503}
504
505/*
506 * Read a portion of a directory.
507 */
7111c66e 508static __be32
1da177e4
LT
509nfsd_proc_readdir(struct svc_rqst *rqstp, struct nfsd_readdirargs *argp,
510 struct nfsd_readdirres *resp)
511{
c4d987ba
AV
512 int count;
513 __be32 nfserr;
1da177e4
LT
514 loff_t offset;
515
516 dprintk("nfsd: READDIR %s %d bytes at %d\n",
517 SVCFH_fmt(&argp->fh),
518 argp->count, argp->cookie);
519
520 /* Shrink to the client read size */
521 count = (argp->count >> 2) - 2;
522
523 /* Make sure we've room for the NULL ptr & eof flag */
524 count -= 2;
525 if (count < 0)
526 count = 0;
527
528 resp->buffer = argp->buffer;
529 resp->offset = NULL;
530 resp->buflen = count;
531 resp->common.err = nfs_ok;
532 /* Read directory and encode entries on the fly */
533 offset = argp->cookie;
534 nfserr = nfsd_readdir(rqstp, &argp->fh, &offset,
535 &resp->common, nfssvc_encode_entry);
536
537 resp->count = resp->buffer - argp->buffer;
538 if (resp->offset)
539 *resp->offset = htonl(offset);
540
541 fh_put(&argp->fh);
542 return nfserr;
543}
544
545/*
546 * Get file system info
547 */
7111c66e 548static __be32
1da177e4
LT
549nfsd_proc_statfs(struct svc_rqst * rqstp, struct nfsd_fhandle *argp,
550 struct nfsd_statfsres *resp)
551{
c4d987ba 552 __be32 nfserr;
1da177e4
LT
553
554 dprintk("nfsd: STATFS %s\n", SVCFH_fmt(&argp->fh));
555
04716e66
BF
556 nfserr = nfsd_statfs(rqstp, &argp->fh, &resp->stats,
557 NFSD_MAY_BYPASS_GSS_ON_ROOT);
1da177e4
LT
558 fh_put(&argp->fh);
559 return nfserr;
560}
561
562/*
563 * NFSv2 Server procedures.
564 * Only the results of non-idempotent operations are cached.
565 */
1da177e4
LT
566struct nfsd_void { int dummy; };
567
1da177e4
LT
568#define ST 1 /* status */
569#define FH 8 /* filehandle */
570#define AT 18 /* attributes */
571
572static struct svc_procedure nfsd_procedures2[18] = {
b9081d90
YZ
573 [NFSPROC_NULL] = {
574 .pc_func = (svc_procfunc) nfsd_proc_null,
575 .pc_decode = (kxdrproc_t) nfssvc_decode_void,
576 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
577 .pc_argsize = sizeof(struct nfsd_void),
578 .pc_ressize = sizeof(struct nfsd_void),
579 .pc_cachetype = RC_NOCACHE,
580 .pc_xdrressize = ST,
581 },
582 [NFSPROC_GETATTR] = {
583 .pc_func = (svc_procfunc) nfsd_proc_getattr,
584 .pc_decode = (kxdrproc_t) nfssvc_decode_fhandle,
585 .pc_encode = (kxdrproc_t) nfssvc_encode_attrstat,
586 .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
587 .pc_argsize = sizeof(struct nfsd_fhandle),
588 .pc_ressize = sizeof(struct nfsd_attrstat),
589 .pc_cachetype = RC_NOCACHE,
590 .pc_xdrressize = ST+AT,
591 },
592 [NFSPROC_SETATTR] = {
593 .pc_func = (svc_procfunc) nfsd_proc_setattr,
594 .pc_decode = (kxdrproc_t) nfssvc_decode_sattrargs,
595 .pc_encode = (kxdrproc_t) nfssvc_encode_attrstat,
596 .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
597 .pc_argsize = sizeof(struct nfsd_sattrargs),
598 .pc_ressize = sizeof(struct nfsd_attrstat),
599 .pc_cachetype = RC_REPLBUFF,
600 .pc_xdrressize = ST+AT,
601 },
602 [NFSPROC_ROOT] = {
603 .pc_decode = (kxdrproc_t) nfssvc_decode_void,
604 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
605 .pc_argsize = sizeof(struct nfsd_void),
606 .pc_ressize = sizeof(struct nfsd_void),
607 .pc_cachetype = RC_NOCACHE,
608 .pc_xdrressize = ST,
609 },
610 [NFSPROC_LOOKUP] = {
611 .pc_func = (svc_procfunc) nfsd_proc_lookup,
612 .pc_decode = (kxdrproc_t) nfssvc_decode_diropargs,
613 .pc_encode = (kxdrproc_t) nfssvc_encode_diropres,
614 .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
615 .pc_argsize = sizeof(struct nfsd_diropargs),
616 .pc_ressize = sizeof(struct nfsd_diropres),
617 .pc_cachetype = RC_NOCACHE,
618 .pc_xdrressize = ST+FH+AT,
619 },
620 [NFSPROC_READLINK] = {
621 .pc_func = (svc_procfunc) nfsd_proc_readlink,
622 .pc_decode = (kxdrproc_t) nfssvc_decode_readlinkargs,
623 .pc_encode = (kxdrproc_t) nfssvc_encode_readlinkres,
624 .pc_argsize = sizeof(struct nfsd_readlinkargs),
625 .pc_ressize = sizeof(struct nfsd_readlinkres),
626 .pc_cachetype = RC_NOCACHE,
627 .pc_xdrressize = ST+1+NFS_MAXPATHLEN/4,
628 },
629 [NFSPROC_READ] = {
630 .pc_func = (svc_procfunc) nfsd_proc_read,
631 .pc_decode = (kxdrproc_t) nfssvc_decode_readargs,
632 .pc_encode = (kxdrproc_t) nfssvc_encode_readres,
633 .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
634 .pc_argsize = sizeof(struct nfsd_readargs),
635 .pc_ressize = sizeof(struct nfsd_readres),
636 .pc_cachetype = RC_NOCACHE,
637 .pc_xdrressize = ST+AT+1+NFSSVC_MAXBLKSIZE_V2/4,
638 },
639 [NFSPROC_WRITECACHE] = {
640 .pc_decode = (kxdrproc_t) nfssvc_decode_void,
641 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
642 .pc_argsize = sizeof(struct nfsd_void),
643 .pc_ressize = sizeof(struct nfsd_void),
644 .pc_cachetype = RC_NOCACHE,
645 .pc_xdrressize = ST,
646 },
647 [NFSPROC_WRITE] = {
648 .pc_func = (svc_procfunc) nfsd_proc_write,
649 .pc_decode = (kxdrproc_t) nfssvc_decode_writeargs,
650 .pc_encode = (kxdrproc_t) nfssvc_encode_attrstat,
651 .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
652 .pc_argsize = sizeof(struct nfsd_writeargs),
653 .pc_ressize = sizeof(struct nfsd_attrstat),
654 .pc_cachetype = RC_REPLBUFF,
655 .pc_xdrressize = ST+AT,
656 },
657 [NFSPROC_CREATE] = {
658 .pc_func = (svc_procfunc) nfsd_proc_create,
659 .pc_decode = (kxdrproc_t) nfssvc_decode_createargs,
660 .pc_encode = (kxdrproc_t) nfssvc_encode_diropres,
661 .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
662 .pc_argsize = sizeof(struct nfsd_createargs),
663 .pc_ressize = sizeof(struct nfsd_diropres),
664 .pc_cachetype = RC_REPLBUFF,
665 .pc_xdrressize = ST+FH+AT,
666 },
667 [NFSPROC_REMOVE] = {
668 .pc_func = (svc_procfunc) nfsd_proc_remove,
669 .pc_decode = (kxdrproc_t) nfssvc_decode_diropargs,
670 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
671 .pc_argsize = sizeof(struct nfsd_diropargs),
672 .pc_ressize = sizeof(struct nfsd_void),
673 .pc_cachetype = RC_REPLSTAT,
674 .pc_xdrressize = ST,
675 },
676 [NFSPROC_RENAME] = {
677 .pc_func = (svc_procfunc) nfsd_proc_rename,
678 .pc_decode = (kxdrproc_t) nfssvc_decode_renameargs,
679 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
680 .pc_argsize = sizeof(struct nfsd_renameargs),
681 .pc_ressize = sizeof(struct nfsd_void),
682 .pc_cachetype = RC_REPLSTAT,
683 .pc_xdrressize = ST,
684 },
685 [NFSPROC_LINK] = {
686 .pc_func = (svc_procfunc) nfsd_proc_link,
687 .pc_decode = (kxdrproc_t) nfssvc_decode_linkargs,
688 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
689 .pc_argsize = sizeof(struct nfsd_linkargs),
690 .pc_ressize = sizeof(struct nfsd_void),
691 .pc_cachetype = RC_REPLSTAT,
692 .pc_xdrressize = ST,
693 },
694 [NFSPROC_SYMLINK] = {
695 .pc_func = (svc_procfunc) nfsd_proc_symlink,
696 .pc_decode = (kxdrproc_t) nfssvc_decode_symlinkargs,
697 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
698 .pc_argsize = sizeof(struct nfsd_symlinkargs),
699 .pc_ressize = sizeof(struct nfsd_void),
700 .pc_cachetype = RC_REPLSTAT,
701 .pc_xdrressize = ST,
702 },
703 [NFSPROC_MKDIR] = {
704 .pc_func = (svc_procfunc) nfsd_proc_mkdir,
705 .pc_decode = (kxdrproc_t) nfssvc_decode_createargs,
706 .pc_encode = (kxdrproc_t) nfssvc_encode_diropres,
707 .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
708 .pc_argsize = sizeof(struct nfsd_createargs),
709 .pc_ressize = sizeof(struct nfsd_diropres),
710 .pc_cachetype = RC_REPLBUFF,
711 .pc_xdrressize = ST+FH+AT,
712 },
713 [NFSPROC_RMDIR] = {
714 .pc_func = (svc_procfunc) nfsd_proc_rmdir,
715 .pc_decode = (kxdrproc_t) nfssvc_decode_diropargs,
716 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
717 .pc_argsize = sizeof(struct nfsd_diropargs),
718 .pc_ressize = sizeof(struct nfsd_void),
719 .pc_cachetype = RC_REPLSTAT,
720 .pc_xdrressize = ST,
721 },
722 [NFSPROC_READDIR] = {
723 .pc_func = (svc_procfunc) nfsd_proc_readdir,
724 .pc_decode = (kxdrproc_t) nfssvc_decode_readdirargs,
725 .pc_encode = (kxdrproc_t) nfssvc_encode_readdirres,
726 .pc_argsize = sizeof(struct nfsd_readdirargs),
727 .pc_ressize = sizeof(struct nfsd_readdirres),
728 .pc_cachetype = RC_NOCACHE,
729 },
730 [NFSPROC_STATFS] = {
731 .pc_func = (svc_procfunc) nfsd_proc_statfs,
732 .pc_decode = (kxdrproc_t) nfssvc_decode_fhandle,
733 .pc_encode = (kxdrproc_t) nfssvc_encode_statfsres,
734 .pc_argsize = sizeof(struct nfsd_fhandle),
735 .pc_ressize = sizeof(struct nfsd_statfsres),
736 .pc_cachetype = RC_NOCACHE,
737 .pc_xdrressize = ST+5,
738 },
1da177e4
LT
739};
740
741
742struct svc_version nfsd_version2 = {
743 .vs_vers = 2,
744 .vs_nproc = 18,
745 .vs_proc = nfsd_procedures2,
746 .vs_dispatch = nfsd_dispatch,
747 .vs_xdrsize = NFS2_SVC_XDRSIZE,
748};
749
750/*
751 * Map errnos to NFS errnos.
752 */
63f10311 753__be32
1da177e4
LT
754nfserrno (int errno)
755{
756 static struct {
63f10311 757 __be32 nfserr;
1da177e4
LT
758 int syserr;
759 } nfs_errtbl[] = {
760 { nfs_ok, 0 },
761 { nfserr_perm, -EPERM },
762 { nfserr_noent, -ENOENT },
763 { nfserr_io, -EIO },
764 { nfserr_nxio, -ENXIO },
62814d6a 765 { nfserr_fbig, -E2BIG },
1da177e4
LT
766 { nfserr_acces, -EACCES },
767 { nfserr_exist, -EEXIST },
768 { nfserr_xdev, -EXDEV },
769 { nfserr_mlink, -EMLINK },
770 { nfserr_nodev, -ENODEV },
771 { nfserr_notdir, -ENOTDIR },
772 { nfserr_isdir, -EISDIR },
773 { nfserr_inval, -EINVAL },
774 { nfserr_fbig, -EFBIG },
775 { nfserr_nospc, -ENOSPC },
776 { nfserr_rofs, -EROFS },
777 { nfserr_mlink, -EMLINK },
778 { nfserr_nametoolong, -ENAMETOOLONG },
779 { nfserr_notempty, -ENOTEMPTY },
780#ifdef EDQUOT
781 { nfserr_dquot, -EDQUOT },
782#endif
783 { nfserr_stale, -ESTALE },
784 { nfserr_jukebox, -ETIMEDOUT },
599eb304 785 { nfserr_jukebox, -ERESTARTSYS },
062304a8
BF
786 { nfserr_jukebox, -EAGAIN },
787 { nfserr_jukebox, -EWOULDBLOCK },
3beb6cd1 788 { nfserr_jukebox, -ENOMEM },
1da177e4 789 { nfserr_io, -ETXTBSY },
a838cc49 790 { nfserr_notsupp, -EOPNOTSUPP },
b7aeda40 791 { nfserr_toosmall, -ETOOSMALL },
f39bde24 792 { nfserr_serverfault, -ESERVERFAULT },
b3fbfe0e 793 { nfserr_serverfault, -ENFILE },
1da177e4
LT
794 };
795 int i;
796
63f10311 797 for (i = 0; i < ARRAY_SIZE(nfs_errtbl); i++) {
1da177e4
LT
798 if (nfs_errtbl[i].syserr == errno)
799 return nfs_errtbl[i].nfserr;
800 }
ff30f08c 801 WARN_ONCE(1, "nfsd: non-standard errno: %d\n", errno);
1da177e4
LT
802 return nfserr_io;
803}
804