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
13typedef struct svc_rqst	svc_rqst;
14typedef struct svc_buf	svc_buf;
15
16#define NFSDDBG_FACILITY		NFSDDBG_PROC
17
18
19static __be32
20nfsd_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
21{
22	return nfs_ok;
23}
24
25static __be32
26nfsd_return_attrs(__be32 err, struct nfsd_attrstat *resp)
27{
28	if (err) return err;
29	return fh_getattr(&resp->fh, &resp->stat);
30}
31static __be32
32nfsd_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 */
41static __be32
42nfsd_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 */
58static __be32
59nfsd_proc_setattr(struct svc_rqst *rqstp, struct nfsd_sattrargs *argp,
60					  struct nfsd_attrstat  *resp)
61{
62	__be32 nfserr;
63	dprintk("nfsd: SETATTR  %s, valid=%x, size=%ld\n",
64		SVCFH_fmt(&argp->fh),
65		argp->attrs.ia_valid, (long) argp->attrs.ia_size);
66
67	fh_copy(&resp->fh, &argp->fh);
68	nfserr = nfsd_setattr(rqstp, &resp->fh, &argp->attrs,0, (time_t)0);
69	return nfsd_return_attrs(nfserr, resp);
70}
71
72/*
73 * Look up a path name component
74 * Note: the dentry in the resp->fh may be negative if the file
75 * doesn't exist yet.
76 * N.B. After this call resp->fh needs an fh_put
77 */
78static __be32
79nfsd_proc_lookup(struct svc_rqst *rqstp, struct nfsd_diropargs *argp,
80					 struct nfsd_diropres  *resp)
81{
82	__be32	nfserr;
83
84	dprintk("nfsd: LOOKUP   %s %.*s\n",
85		SVCFH_fmt(&argp->fh), argp->len, argp->name);
86
87	fh_init(&resp->fh, NFS_FHSIZE);
88	nfserr = nfsd_lookup(rqstp, &argp->fh, argp->name, argp->len,
89				 &resp->fh);
90
91	fh_put(&argp->fh);
92	return nfsd_return_dirop(nfserr, resp);
93}
94
95/*
96 * Read a symlink.
97 */
98static __be32
99nfsd_proc_readlink(struct svc_rqst *rqstp, struct nfsd_readlinkargs *argp,
100					   struct nfsd_readlinkres *resp)
101{
102	__be32	nfserr;
103
104	dprintk("nfsd: READLINK %s\n", SVCFH_fmt(&argp->fh));
105
106	/* Read the symlink. */
107	resp->len = NFS_MAXPATHLEN;
108	nfserr = nfsd_readlink(rqstp, &argp->fh, argp->buffer, &resp->len);
109
110	fh_put(&argp->fh);
111	return nfserr;
112}
113
114/*
115 * Read a portion of a file.
116 * N.B. After this call resp->fh needs an fh_put
117 */
118static __be32
119nfsd_proc_read(struct svc_rqst *rqstp, struct nfsd_readargs *argp,
120				       struct nfsd_readres  *resp)
121{
122	__be32	nfserr;
123
124	dprintk("nfsd: READ    %s %d bytes at %d\n",
125		SVCFH_fmt(&argp->fh),
126		argp->count, argp->offset);
127
128	/* Obtain buffer pointer for payload. 19 is 1 word for
129	 * status, 17 words for fattr, and 1 word for the byte count.
130	 */
131
132	if (NFSSVC_MAXBLKSIZE_V2 < argp->count) {
133		char buf[RPC_MAX_ADDRBUFLEN];
134		printk(KERN_NOTICE
135			"oversized read request from %s (%d bytes)\n",
136				svc_print_addr(rqstp, buf, sizeof(buf)),
137				argp->count);
138		argp->count = NFSSVC_MAXBLKSIZE_V2;
139	}
140	svc_reserve_auth(rqstp, (19<<2) + argp->count + 4);
141
142	resp->count = argp->count;
143	nfserr = nfsd_read(rqstp, fh_copy(&resp->fh, &argp->fh),
144				  argp->offset,
145			   	  rqstp->rq_vec, argp->vlen,
146				  &resp->count);
147
148	if (nfserr) return nfserr;
149	return fh_getattr(&resp->fh, &resp->stat);
150}
151
152/*
153 * Write data to a file
154 * N.B. After this call resp->fh needs an fh_put
155 */
156static __be32
157nfsd_proc_write(struct svc_rqst *rqstp, struct nfsd_writeargs *argp,
158					struct nfsd_attrstat  *resp)
159{
160	__be32	nfserr;
161	int	stable = 1;
162	unsigned long cnt = argp->len;
163
164	dprintk("nfsd: WRITE    %s %d bytes at %d\n",
165		SVCFH_fmt(&argp->fh),
166		argp->len, argp->offset);
167
168	nfserr = nfsd_write(rqstp, fh_copy(&resp->fh, &argp->fh), NULL,
169				   argp->offset,
170				   rqstp->rq_vec, argp->vlen,
171			           &cnt,
172				   &stable);
173	return nfsd_return_attrs(nfserr, resp);
174}
175
176/*
177 * CREATE processing is complicated. The keyword here is `overloaded.'
178 * The parent directory is kept locked between the check for existence
179 * and the actual create() call in compliance with VFS protocols.
180 * N.B. After this call _both_ argp->fh and resp->fh need an fh_put
181 */
182static __be32
183nfsd_proc_create(struct svc_rqst *rqstp, struct nfsd_createargs *argp,
184					 struct nfsd_diropres   *resp)
185{
186	svc_fh		*dirfhp = &argp->fh;
187	svc_fh		*newfhp = &resp->fh;
188	struct iattr	*attr = &argp->attrs;
189	struct inode	*inode;
190	struct dentry	*dchild;
191	int		type, mode;
192	__be32		nfserr;
193	int		hosterr;
194	dev_t		rdev = 0, wanted = new_decode_dev(attr->ia_size);
195
196	dprintk("nfsd: CREATE   %s %.*s\n",
197		SVCFH_fmt(dirfhp), argp->len, argp->name);
198
199	/* First verify the parent file handle */
200	nfserr = fh_verify(rqstp, dirfhp, S_IFDIR, NFSD_MAY_EXEC);
201	if (nfserr)
202		goto done; /* must fh_put dirfhp even on error */
203
204	/* Check for NFSD_MAY_WRITE in nfsd_create if necessary */
205
206	nfserr = nfserr_acces;
207	if (!argp->len)
208		goto done;
209	nfserr = nfserr_exist;
210	if (isdotent(argp->name, argp->len))
211		goto done;
212	hosterr = fh_want_write(dirfhp);
213	if (hosterr) {
214		nfserr = nfserrno(hosterr);
215		goto done;
216	}
217
218	fh_lock_nested(dirfhp, I_MUTEX_PARENT);
219	dchild = lookup_one_len(argp->name, dirfhp->fh_dentry, argp->len);
220	if (IS_ERR(dchild)) {
221		nfserr = nfserrno(PTR_ERR(dchild));
222		goto out_unlock;
223	}
224	fh_init(newfhp, NFS_FHSIZE);
225	nfserr = fh_compose(newfhp, dirfhp->fh_export, dchild, dirfhp);
226	if (!nfserr && d_really_is_negative(dchild))
227		nfserr = nfserr_noent;
228	dput(dchild);
229	if (nfserr) {
230		if (nfserr != nfserr_noent)
231			goto out_unlock;
232		/*
233		 * If the new file handle wasn't verified, we can't tell
234		 * whether the file exists or not. Time to bail ...
235		 */
236		nfserr = nfserr_acces;
237		if (!newfhp->fh_dentry) {
238			printk(KERN_WARNING
239				"nfsd_proc_create: file handle not verified\n");
240			goto out_unlock;
241		}
242	}
243
244	inode = d_inode(newfhp->fh_dentry);
245
246	/* Unfudge the mode bits */
247	if (attr->ia_valid & ATTR_MODE) {
248		type = attr->ia_mode & S_IFMT;
249		mode = attr->ia_mode & ~S_IFMT;
250		if (!type) {
251			/* no type, so if target exists, assume same as that,
252			 * else assume a file */
253			if (inode) {
254				type = inode->i_mode & S_IFMT;
255				switch(type) {
256				case S_IFCHR:
257				case S_IFBLK:
258					/* reserve rdev for later checking */
259					rdev = inode->i_rdev;
260					attr->ia_valid |= ATTR_SIZE;
261
262					/* FALLTHROUGH */
263				case S_IFIFO:
264					/* this is probably a permission check..
265					 * at least IRIX implements perm checking on
266					 *   echo thing > device-special-file-or-pipe
267					 * by doing a CREATE with type==0
268					 */
269					nfserr = nfsd_permission(rqstp,
270								 newfhp->fh_export,
271								 newfhp->fh_dentry,
272								 NFSD_MAY_WRITE|NFSD_MAY_LOCAL_ACCESS);
273					if (nfserr && nfserr != nfserr_rofs)
274						goto out_unlock;
275				}
276			} else
277				type = S_IFREG;
278		}
279	} else if (inode) {
280		type = inode->i_mode & S_IFMT;
281		mode = inode->i_mode & ~S_IFMT;
282	} else {
283		type = S_IFREG;
284		mode = 0;	/* ??? */
285	}
286
287	attr->ia_valid |= ATTR_MODE;
288	attr->ia_mode = mode;
289
290	/* Special treatment for non-regular files according to the
291	 * gospel of sun micro
292	 */
293	if (type != S_IFREG) {
294		if (type != S_IFBLK && type != S_IFCHR) {
295			rdev = 0;
296		} else if (type == S_IFCHR && !(attr->ia_valid & ATTR_SIZE)) {
297			/* If you think you've seen the worst, grok this. */
298			type = S_IFIFO;
299		} else {
300			/* Okay, char or block special */
301			if (!rdev)
302				rdev = wanted;
303		}
304
305		/* we've used the SIZE information, so discard it */
306		attr->ia_valid &= ~ATTR_SIZE;
307
308		/* Make sure the type and device matches */
309		nfserr = nfserr_exist;
310		if (inode && type != (inode->i_mode & S_IFMT))
311			goto out_unlock;
312	}
313
314	nfserr = 0;
315	if (!inode) {
316		/* File doesn't exist. Create it and set attrs */
317		nfserr = nfsd_create(rqstp, dirfhp, argp->name, argp->len,
318					attr, type, rdev, newfhp);
319	} else if (type == S_IFREG) {
320		dprintk("nfsd:   existing %s, valid=%x, size=%ld\n",
321			argp->name, attr->ia_valid, (long) attr->ia_size);
322		/* File already exists. We ignore all attributes except
323		 * size, so that creat() behaves exactly like
324		 * open(..., O_CREAT|O_TRUNC|O_WRONLY).
325		 */
326		attr->ia_valid &= ATTR_SIZE;
327		if (attr->ia_valid)
328			nfserr = nfsd_setattr(rqstp, newfhp, attr, 0, (time_t)0);
329	}
330
331out_unlock:
332	/* We don't really need to unlock, as fh_put does it. */
333	fh_unlock(dirfhp);
334	fh_drop_write(dirfhp);
335done:
336	fh_put(dirfhp);
337	return nfsd_return_dirop(nfserr, resp);
338}
339
340static __be32
341nfsd_proc_remove(struct svc_rqst *rqstp, struct nfsd_diropargs *argp,
342					 void		       *resp)
343{
344	__be32	nfserr;
345
346	dprintk("nfsd: REMOVE   %s %.*s\n", SVCFH_fmt(&argp->fh),
347		argp->len, argp->name);
348
349	/* Unlink. -SIFDIR means file must not be a directory */
350	nfserr = nfsd_unlink(rqstp, &argp->fh, -S_IFDIR, argp->name, argp->len);
351	fh_put(&argp->fh);
352	return nfserr;
353}
354
355static __be32
356nfsd_proc_rename(struct svc_rqst *rqstp, struct nfsd_renameargs *argp,
357				  	 void		        *resp)
358{
359	__be32	nfserr;
360
361	dprintk("nfsd: RENAME   %s %.*s -> \n",
362		SVCFH_fmt(&argp->ffh), argp->flen, argp->fname);
363	dprintk("nfsd:        ->  %s %.*s\n",
364		SVCFH_fmt(&argp->tfh), argp->tlen, argp->tname);
365
366	nfserr = nfsd_rename(rqstp, &argp->ffh, argp->fname, argp->flen,
367				    &argp->tfh, argp->tname, argp->tlen);
368	fh_put(&argp->ffh);
369	fh_put(&argp->tfh);
370	return nfserr;
371}
372
373static __be32
374nfsd_proc_link(struct svc_rqst *rqstp, struct nfsd_linkargs *argp,
375				void			    *resp)
376{
377	__be32	nfserr;
378
379	dprintk("nfsd: LINK     %s ->\n",
380		SVCFH_fmt(&argp->ffh));
381	dprintk("nfsd:    %s %.*s\n",
382		SVCFH_fmt(&argp->tfh),
383		argp->tlen,
384		argp->tname);
385
386	nfserr = nfsd_link(rqstp, &argp->tfh, argp->tname, argp->tlen,
387				  &argp->ffh);
388	fh_put(&argp->ffh);
389	fh_put(&argp->tfh);
390	return nfserr;
391}
392
393static __be32
394nfsd_proc_symlink(struct svc_rqst *rqstp, struct nfsd_symlinkargs *argp,
395				          void			  *resp)
396{
397	struct svc_fh	newfh;
398	__be32		nfserr;
399
400	dprintk("nfsd: SYMLINK  %s %.*s -> %.*s\n",
401		SVCFH_fmt(&argp->ffh), argp->flen, argp->fname,
402		argp->tlen, argp->tname);
403
404	fh_init(&newfh, NFS_FHSIZE);
405	/*
406	 * Crazy hack: the request fits in a page, and already-decoded
407	 * attributes follow argp->tname, so it's safe to just write a
408	 * null to ensure it's null-terminated:
409	 */
410	argp->tname[argp->tlen] = '\0';
411	nfserr = nfsd_symlink(rqstp, &argp->ffh, argp->fname, argp->flen,
412						 argp->tname, &newfh);
413
414	fh_put(&argp->ffh);
415	fh_put(&newfh);
416	return nfserr;
417}
418
419/*
420 * Make directory. This operation is not idempotent.
421 * N.B. After this call resp->fh needs an fh_put
422 */
423static __be32
424nfsd_proc_mkdir(struct svc_rqst *rqstp, struct nfsd_createargs *argp,
425					struct nfsd_diropres   *resp)
426{
427	__be32	nfserr;
428
429	dprintk("nfsd: MKDIR    %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name);
430
431	if (resp->fh.fh_dentry) {
432		printk(KERN_WARNING
433			"nfsd_proc_mkdir: response already verified??\n");
434	}
435
436	argp->attrs.ia_valid &= ~ATTR_SIZE;
437	fh_init(&resp->fh, NFS_FHSIZE);
438	nfserr = nfsd_create(rqstp, &argp->fh, argp->name, argp->len,
439				    &argp->attrs, S_IFDIR, 0, &resp->fh);
440	fh_put(&argp->fh);
441	return nfsd_return_dirop(nfserr, resp);
442}
443
444/*
445 * Remove a directory
446 */
447static __be32
448nfsd_proc_rmdir(struct svc_rqst *rqstp, struct nfsd_diropargs *argp,
449				 	void		      *resp)
450{
451	__be32	nfserr;
452
453	dprintk("nfsd: RMDIR    %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name);
454
455	nfserr = nfsd_unlink(rqstp, &argp->fh, S_IFDIR, argp->name, argp->len);
456	fh_put(&argp->fh);
457	return nfserr;
458}
459
460/*
461 * Read a portion of a directory.
462 */
463static __be32
464nfsd_proc_readdir(struct svc_rqst *rqstp, struct nfsd_readdirargs *argp,
465					  struct nfsd_readdirres  *resp)
466{
467	int		count;
468	__be32		nfserr;
469	loff_t		offset;
470
471	dprintk("nfsd: READDIR  %s %d bytes at %d\n",
472		SVCFH_fmt(&argp->fh),
473		argp->count, argp->cookie);
474
475	/* Shrink to the client read size */
476	count = (argp->count >> 2) - 2;
477
478	/* Make sure we've room for the NULL ptr & eof flag */
479	count -= 2;
480	if (count < 0)
481		count = 0;
482
483	resp->buffer = argp->buffer;
484	resp->offset = NULL;
485	resp->buflen = count;
486	resp->common.err = nfs_ok;
487	/* Read directory and encode entries on the fly */
488	offset = argp->cookie;
489	nfserr = nfsd_readdir(rqstp, &argp->fh, &offset,
490			      &resp->common, nfssvc_encode_entry);
491
492	resp->count = resp->buffer - argp->buffer;
493	if (resp->offset)
494		*resp->offset = htonl(offset);
495
496	fh_put(&argp->fh);
497	return nfserr;
498}
499
500/*
501 * Get file system info
502 */
503static __be32
504nfsd_proc_statfs(struct svc_rqst * rqstp, struct nfsd_fhandle   *argp,
505					  struct nfsd_statfsres *resp)
506{
507	__be32	nfserr;
508
509	dprintk("nfsd: STATFS   %s\n", SVCFH_fmt(&argp->fh));
510
511	nfserr = nfsd_statfs(rqstp, &argp->fh, &resp->stats,
512			NFSD_MAY_BYPASS_GSS_ON_ROOT);
513	fh_put(&argp->fh);
514	return nfserr;
515}
516
517/*
518 * NFSv2 Server procedures.
519 * Only the results of non-idempotent operations are cached.
520 */
521struct nfsd_void { int dummy; };
522
523#define ST 1		/* status */
524#define FH 8		/* filehandle */
525#define	AT 18		/* attributes */
526
527static struct svc_procedure		nfsd_procedures2[18] = {
528	[NFSPROC_NULL] = {
529		.pc_func = (svc_procfunc) nfsd_proc_null,
530		.pc_decode = (kxdrproc_t) nfssvc_decode_void,
531		.pc_encode = (kxdrproc_t) nfssvc_encode_void,
532		.pc_argsize = sizeof(struct nfsd_void),
533		.pc_ressize = sizeof(struct nfsd_void),
534		.pc_cachetype = RC_NOCACHE,
535		.pc_xdrressize = ST,
536	},
537	[NFSPROC_GETATTR] = {
538		.pc_func = (svc_procfunc) nfsd_proc_getattr,
539		.pc_decode = (kxdrproc_t) nfssvc_decode_fhandle,
540		.pc_encode = (kxdrproc_t) nfssvc_encode_attrstat,
541		.pc_release = (kxdrproc_t) nfssvc_release_fhandle,
542		.pc_argsize = sizeof(struct nfsd_fhandle),
543		.pc_ressize = sizeof(struct nfsd_attrstat),
544		.pc_cachetype = RC_NOCACHE,
545		.pc_xdrressize = ST+AT,
546	},
547	[NFSPROC_SETATTR] = {
548		.pc_func = (svc_procfunc) nfsd_proc_setattr,
549		.pc_decode = (kxdrproc_t) nfssvc_decode_sattrargs,
550		.pc_encode = (kxdrproc_t) nfssvc_encode_attrstat,
551		.pc_release = (kxdrproc_t) nfssvc_release_fhandle,
552		.pc_argsize = sizeof(struct nfsd_sattrargs),
553		.pc_ressize = sizeof(struct nfsd_attrstat),
554		.pc_cachetype = RC_REPLBUFF,
555		.pc_xdrressize = ST+AT,
556	},
557	[NFSPROC_ROOT] = {
558		.pc_decode = (kxdrproc_t) nfssvc_decode_void,
559		.pc_encode = (kxdrproc_t) nfssvc_encode_void,
560		.pc_argsize = sizeof(struct nfsd_void),
561		.pc_ressize = sizeof(struct nfsd_void),
562		.pc_cachetype = RC_NOCACHE,
563		.pc_xdrressize = ST,
564	},
565	[NFSPROC_LOOKUP] = {
566		.pc_func = (svc_procfunc) nfsd_proc_lookup,
567		.pc_decode = (kxdrproc_t) nfssvc_decode_diropargs,
568		.pc_encode = (kxdrproc_t) nfssvc_encode_diropres,
569		.pc_release = (kxdrproc_t) nfssvc_release_fhandle,
570		.pc_argsize = sizeof(struct nfsd_diropargs),
571		.pc_ressize = sizeof(struct nfsd_diropres),
572		.pc_cachetype = RC_NOCACHE,
573		.pc_xdrressize = ST+FH+AT,
574	},
575	[NFSPROC_READLINK] = {
576		.pc_func = (svc_procfunc) nfsd_proc_readlink,
577		.pc_decode = (kxdrproc_t) nfssvc_decode_readlinkargs,
578		.pc_encode = (kxdrproc_t) nfssvc_encode_readlinkres,
579		.pc_argsize = sizeof(struct nfsd_readlinkargs),
580		.pc_ressize = sizeof(struct nfsd_readlinkres),
581		.pc_cachetype = RC_NOCACHE,
582		.pc_xdrressize = ST+1+NFS_MAXPATHLEN/4,
583	},
584	[NFSPROC_READ] = {
585		.pc_func = (svc_procfunc) nfsd_proc_read,
586		.pc_decode = (kxdrproc_t) nfssvc_decode_readargs,
587		.pc_encode = (kxdrproc_t) nfssvc_encode_readres,
588		.pc_release = (kxdrproc_t) nfssvc_release_fhandle,
589		.pc_argsize = sizeof(struct nfsd_readargs),
590		.pc_ressize = sizeof(struct nfsd_readres),
591		.pc_cachetype = RC_NOCACHE,
592		.pc_xdrressize = ST+AT+1+NFSSVC_MAXBLKSIZE_V2/4,
593	},
594	[NFSPROC_WRITECACHE] = {
595		.pc_decode = (kxdrproc_t) nfssvc_decode_void,
596		.pc_encode = (kxdrproc_t) nfssvc_encode_void,
597		.pc_argsize = sizeof(struct nfsd_void),
598		.pc_ressize = sizeof(struct nfsd_void),
599		.pc_cachetype = RC_NOCACHE,
600		.pc_xdrressize = ST,
601	},
602	[NFSPROC_WRITE] = {
603		.pc_func = (svc_procfunc) nfsd_proc_write,
604		.pc_decode = (kxdrproc_t) nfssvc_decode_writeargs,
605		.pc_encode = (kxdrproc_t) nfssvc_encode_attrstat,
606		.pc_release = (kxdrproc_t) nfssvc_release_fhandle,
607		.pc_argsize = sizeof(struct nfsd_writeargs),
608		.pc_ressize = sizeof(struct nfsd_attrstat),
609		.pc_cachetype = RC_REPLBUFF,
610		.pc_xdrressize = ST+AT,
611	},
612	[NFSPROC_CREATE] = {
613		.pc_func = (svc_procfunc) nfsd_proc_create,
614		.pc_decode = (kxdrproc_t) nfssvc_decode_createargs,
615		.pc_encode = (kxdrproc_t) nfssvc_encode_diropres,
616		.pc_release = (kxdrproc_t) nfssvc_release_fhandle,
617		.pc_argsize = sizeof(struct nfsd_createargs),
618		.pc_ressize = sizeof(struct nfsd_diropres),
619		.pc_cachetype = RC_REPLBUFF,
620		.pc_xdrressize = ST+FH+AT,
621	},
622	[NFSPROC_REMOVE] = {
623		.pc_func = (svc_procfunc) nfsd_proc_remove,
624		.pc_decode = (kxdrproc_t) nfssvc_decode_diropargs,
625		.pc_encode = (kxdrproc_t) nfssvc_encode_void,
626		.pc_argsize = sizeof(struct nfsd_diropargs),
627		.pc_ressize = sizeof(struct nfsd_void),
628		.pc_cachetype = RC_REPLSTAT,
629		.pc_xdrressize = ST,
630	},
631	[NFSPROC_RENAME] = {
632		.pc_func = (svc_procfunc) nfsd_proc_rename,
633		.pc_decode = (kxdrproc_t) nfssvc_decode_renameargs,
634		.pc_encode = (kxdrproc_t) nfssvc_encode_void,
635		.pc_argsize = sizeof(struct nfsd_renameargs),
636		.pc_ressize = sizeof(struct nfsd_void),
637		.pc_cachetype = RC_REPLSTAT,
638		.pc_xdrressize = ST,
639	},
640	[NFSPROC_LINK] = {
641		.pc_func = (svc_procfunc) nfsd_proc_link,
642		.pc_decode = (kxdrproc_t) nfssvc_decode_linkargs,
643		.pc_encode = (kxdrproc_t) nfssvc_encode_void,
644		.pc_argsize = sizeof(struct nfsd_linkargs),
645		.pc_ressize = sizeof(struct nfsd_void),
646		.pc_cachetype = RC_REPLSTAT,
647		.pc_xdrressize = ST,
648	},
649	[NFSPROC_SYMLINK] = {
650		.pc_func = (svc_procfunc) nfsd_proc_symlink,
651		.pc_decode = (kxdrproc_t) nfssvc_decode_symlinkargs,
652		.pc_encode = (kxdrproc_t) nfssvc_encode_void,
653		.pc_argsize = sizeof(struct nfsd_symlinkargs),
654		.pc_ressize = sizeof(struct nfsd_void),
655		.pc_cachetype = RC_REPLSTAT,
656		.pc_xdrressize = ST,
657	},
658	[NFSPROC_MKDIR] = {
659		.pc_func = (svc_procfunc) nfsd_proc_mkdir,
660		.pc_decode = (kxdrproc_t) nfssvc_decode_createargs,
661		.pc_encode = (kxdrproc_t) nfssvc_encode_diropres,
662		.pc_release = (kxdrproc_t) nfssvc_release_fhandle,
663		.pc_argsize = sizeof(struct nfsd_createargs),
664		.pc_ressize = sizeof(struct nfsd_diropres),
665		.pc_cachetype = RC_REPLBUFF,
666		.pc_xdrressize = ST+FH+AT,
667	},
668	[NFSPROC_RMDIR] = {
669		.pc_func = (svc_procfunc) nfsd_proc_rmdir,
670		.pc_decode = (kxdrproc_t) nfssvc_decode_diropargs,
671		.pc_encode = (kxdrproc_t) nfssvc_encode_void,
672		.pc_argsize = sizeof(struct nfsd_diropargs),
673		.pc_ressize = sizeof(struct nfsd_void),
674		.pc_cachetype = RC_REPLSTAT,
675		.pc_xdrressize = ST,
676	},
677	[NFSPROC_READDIR] = {
678		.pc_func = (svc_procfunc) nfsd_proc_readdir,
679		.pc_decode = (kxdrproc_t) nfssvc_decode_readdirargs,
680		.pc_encode = (kxdrproc_t) nfssvc_encode_readdirres,
681		.pc_argsize = sizeof(struct nfsd_readdirargs),
682		.pc_ressize = sizeof(struct nfsd_readdirres),
683		.pc_cachetype = RC_NOCACHE,
684	},
685	[NFSPROC_STATFS] = {
686		.pc_func = (svc_procfunc) nfsd_proc_statfs,
687		.pc_decode = (kxdrproc_t) nfssvc_decode_fhandle,
688		.pc_encode = (kxdrproc_t) nfssvc_encode_statfsres,
689		.pc_argsize = sizeof(struct nfsd_fhandle),
690		.pc_ressize = sizeof(struct nfsd_statfsres),
691		.pc_cachetype = RC_NOCACHE,
692		.pc_xdrressize = ST+5,
693	},
694};
695
696
697struct svc_version	nfsd_version2 = {
698		.vs_vers	= 2,
699		.vs_nproc	= 18,
700		.vs_proc	= nfsd_procedures2,
701		.vs_dispatch	= nfsd_dispatch,
702		.vs_xdrsize	= NFS2_SVC_XDRSIZE,
703};
704
705/*
706 * Map errnos to NFS errnos.
707 */
708__be32
709nfserrno (int errno)
710{
711	static struct {
712		__be32	nfserr;
713		int	syserr;
714	} nfs_errtbl[] = {
715		{ nfs_ok, 0 },
716		{ nfserr_perm, -EPERM },
717		{ nfserr_noent, -ENOENT },
718		{ nfserr_io, -EIO },
719		{ nfserr_nxio, -ENXIO },
720		{ nfserr_fbig, -E2BIG },
721		{ nfserr_acces, -EACCES },
722		{ nfserr_exist, -EEXIST },
723		{ nfserr_xdev, -EXDEV },
724		{ nfserr_mlink, -EMLINK },
725		{ nfserr_nodev, -ENODEV },
726		{ nfserr_notdir, -ENOTDIR },
727		{ nfserr_isdir, -EISDIR },
728		{ nfserr_inval, -EINVAL },
729		{ nfserr_fbig, -EFBIG },
730		{ nfserr_nospc, -ENOSPC },
731		{ nfserr_rofs, -EROFS },
732		{ nfserr_mlink, -EMLINK },
733		{ nfserr_nametoolong, -ENAMETOOLONG },
734		{ nfserr_notempty, -ENOTEMPTY },
735#ifdef EDQUOT
736		{ nfserr_dquot, -EDQUOT },
737#endif
738		{ nfserr_stale, -ESTALE },
739		{ nfserr_jukebox, -ETIMEDOUT },
740		{ nfserr_jukebox, -ERESTARTSYS },
741		{ nfserr_jukebox, -EAGAIN },
742		{ nfserr_jukebox, -EWOULDBLOCK },
743		{ nfserr_jukebox, -ENOMEM },
744		{ nfserr_io, -ETXTBSY },
745		{ nfserr_notsupp, -EOPNOTSUPP },
746		{ nfserr_toosmall, -ETOOSMALL },
747		{ nfserr_serverfault, -ESERVERFAULT },
748		{ nfserr_serverfault, -ENFILE },
749	};
750	int	i;
751
752	for (i = 0; i < ARRAY_SIZE(nfs_errtbl); i++) {
753		if (nfs_errtbl[i].syserr == errno)
754			return nfs_errtbl[i].nfserr;
755	}
756	WARN(1, "nfsd: non-standard errno: %d\n", errno);
757	return nfserr_io;
758}
759
760