xref: /openbmc/linux/fs/nfsd/nfs3proc.c (revision 87c2ce3b)
1 /*
2  * linux/fs/nfsd/nfs3proc.c
3  *
4  * Process version 3 NFS requests.
5  *
6  * Copyright (C) 1996, 1997, 1998 Olaf Kirch <okir@monad.swb.de>
7  */
8 
9 #include <linux/linkage.h>
10 #include <linux/time.h>
11 #include <linux/errno.h>
12 #include <linux/fs.h>
13 #include <linux/ext2_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/unistd.h>
19 #include <linux/slab.h>
20 #include <linux/major.h>
21 
22 #include <linux/sunrpc/svc.h>
23 #include <linux/nfsd/nfsd.h>
24 #include <linux/nfsd/cache.h>
25 #include <linux/nfsd/xdr3.h>
26 #include <linux/nfs3.h>
27 
28 #define NFSDDBG_FACILITY		NFSDDBG_PROC
29 
30 #define RETURN_STATUS(st)	{ resp->status = (st); return (st); }
31 
32 static int	nfs3_ftypes[] = {
33 	0,			/* NF3NON */
34 	S_IFREG,		/* NF3REG */
35 	S_IFDIR,		/* NF3DIR */
36 	S_IFBLK,		/* NF3BLK */
37 	S_IFCHR,		/* NF3CHR */
38 	S_IFLNK,		/* NF3LNK */
39 	S_IFSOCK,		/* NF3SOCK */
40 	S_IFIFO,		/* NF3FIFO */
41 };
42 
43 /*
44  * NULL call.
45  */
46 static int
47 nfsd3_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
48 {
49 	return nfs_ok;
50 }
51 
52 /*
53  * Get a file's attributes
54  */
55 static int
56 nfsd3_proc_getattr(struct svc_rqst *rqstp, struct nfsd_fhandle  *argp,
57 					   struct nfsd3_attrstat *resp)
58 {
59 	int	err, nfserr;
60 
61 	dprintk("nfsd: GETATTR(3)  %s\n",
62 		SVCFH_fmt(&argp->fh));
63 
64 	fh_copy(&resp->fh, &argp->fh);
65 	nfserr = fh_verify(rqstp, &resp->fh, 0, MAY_NOP);
66 	if (nfserr)
67 		RETURN_STATUS(nfserr);
68 
69 	err = vfs_getattr(resp->fh.fh_export->ex_mnt,
70 			  resp->fh.fh_dentry, &resp->stat);
71 	nfserr = nfserrno(err);
72 
73 	RETURN_STATUS(nfserr);
74 }
75 
76 /*
77  * Set a file's attributes
78  */
79 static int
80 nfsd3_proc_setattr(struct svc_rqst *rqstp, struct nfsd3_sattrargs *argp,
81 					   struct nfsd3_attrstat  *resp)
82 {
83 	int	nfserr;
84 
85 	dprintk("nfsd: SETATTR(3)  %s\n",
86 				SVCFH_fmt(&argp->fh));
87 
88 	fh_copy(&resp->fh, &argp->fh);
89 	nfserr = nfsd_setattr(rqstp, &resp->fh, &argp->attrs,
90 			      argp->check_guard, argp->guardtime);
91 	RETURN_STATUS(nfserr);
92 }
93 
94 /*
95  * Look up a path name component
96  */
97 static int
98 nfsd3_proc_lookup(struct svc_rqst *rqstp, struct nfsd3_diropargs *argp,
99 					  struct nfsd3_diropres  *resp)
100 {
101 	int	nfserr;
102 
103 	dprintk("nfsd: LOOKUP(3)   %s %.*s\n",
104 				SVCFH_fmt(&argp->fh),
105 				argp->len,
106 				argp->name);
107 
108 	fh_copy(&resp->dirfh, &argp->fh);
109 	fh_init(&resp->fh, NFS3_FHSIZE);
110 
111 	nfserr = nfsd_lookup(rqstp, &resp->dirfh,
112 				    argp->name,
113 				    argp->len,
114 				    &resp->fh);
115 	RETURN_STATUS(nfserr);
116 }
117 
118 /*
119  * Check file access
120  */
121 static int
122 nfsd3_proc_access(struct svc_rqst *rqstp, struct nfsd3_accessargs *argp,
123 					  struct nfsd3_accessres *resp)
124 {
125 	int	nfserr;
126 
127 	dprintk("nfsd: ACCESS(3)   %s 0x%x\n",
128 				SVCFH_fmt(&argp->fh),
129 				argp->access);
130 
131 	fh_copy(&resp->fh, &argp->fh);
132 	resp->access = argp->access;
133 	nfserr = nfsd_access(rqstp, &resp->fh, &resp->access, NULL);
134 	RETURN_STATUS(nfserr);
135 }
136 
137 /*
138  * Read a symlink.
139  */
140 static int
141 nfsd3_proc_readlink(struct svc_rqst *rqstp, struct nfsd3_readlinkargs *argp,
142 					   struct nfsd3_readlinkres *resp)
143 {
144 	int nfserr;
145 
146 	dprintk("nfsd: READLINK(3) %s\n", SVCFH_fmt(&argp->fh));
147 
148 	/* Read the symlink. */
149 	fh_copy(&resp->fh, &argp->fh);
150 	resp->len = NFS3_MAXPATHLEN;
151 	nfserr = nfsd_readlink(rqstp, &resp->fh, argp->buffer, &resp->len);
152 	RETURN_STATUS(nfserr);
153 }
154 
155 /*
156  * Read a portion of a file.
157  */
158 static int
159 nfsd3_proc_read(struct svc_rqst *rqstp, struct nfsd3_readargs *argp,
160 				        struct nfsd3_readres  *resp)
161 {
162 	int	nfserr;
163 
164 	dprintk("nfsd: READ(3) %s %lu bytes at %lu\n",
165 				SVCFH_fmt(&argp->fh),
166 				(unsigned long) argp->count,
167 				(unsigned long) argp->offset);
168 
169 	/* Obtain buffer pointer for payload.
170 	 * 1 (status) + 22 (post_op_attr) + 1 (count) + 1 (eof)
171 	 * + 1 (xdr opaque byte count) = 26
172 	 */
173 
174 	resp->count = argp->count;
175 	if (NFSSVC_MAXBLKSIZE < resp->count)
176 		resp->count = NFSSVC_MAXBLKSIZE;
177 
178 	svc_reserve(rqstp, ((1 + NFS3_POST_OP_ATTR_WORDS + 3)<<2) + resp->count +4);
179 
180 	fh_copy(&resp->fh, &argp->fh);
181 	nfserr = nfsd_read(rqstp, &resp->fh, NULL,
182 				  argp->offset,
183 			   	  argp->vec, argp->vlen,
184 				  &resp->count);
185 	if (nfserr == 0) {
186 		struct inode	*inode = resp->fh.fh_dentry->d_inode;
187 
188 		resp->eof = (argp->offset + resp->count) >= inode->i_size;
189 	}
190 
191 	RETURN_STATUS(nfserr);
192 }
193 
194 /*
195  * Write data to a file
196  */
197 static int
198 nfsd3_proc_write(struct svc_rqst *rqstp, struct nfsd3_writeargs *argp,
199 					 struct nfsd3_writeres  *resp)
200 {
201 	int	nfserr;
202 
203 	dprintk("nfsd: WRITE(3)    %s %d bytes at %ld%s\n",
204 				SVCFH_fmt(&argp->fh),
205 				argp->len,
206 				(unsigned long) argp->offset,
207 				argp->stable? " stable" : "");
208 
209 	fh_copy(&resp->fh, &argp->fh);
210 	resp->committed = argp->stable;
211 	nfserr = nfsd_write(rqstp, &resp->fh, NULL,
212 				   argp->offset,
213 				   argp->vec, argp->vlen,
214 				   argp->len,
215 				   &resp->committed);
216 	resp->count = argp->count;
217 	RETURN_STATUS(nfserr);
218 }
219 
220 /*
221  * With NFSv3, CREATE processing is a lot easier than with NFSv2.
222  * At least in theory; we'll see how it fares in practice when the
223  * first reports about SunOS compatibility problems start to pour in...
224  */
225 static int
226 nfsd3_proc_create(struct svc_rqst *rqstp, struct nfsd3_createargs *argp,
227 					  struct nfsd3_diropres   *resp)
228 {
229 	svc_fh		*dirfhp, *newfhp = NULL;
230 	struct iattr	*attr;
231 	u32		nfserr;
232 
233 	dprintk("nfsd: CREATE(3)   %s %.*s\n",
234 				SVCFH_fmt(&argp->fh),
235 				argp->len,
236 				argp->name);
237 
238 	dirfhp = fh_copy(&resp->dirfh, &argp->fh);
239 	newfhp = fh_init(&resp->fh, NFS3_FHSIZE);
240 	attr   = &argp->attrs;
241 
242 	/* Get the directory inode */
243 	nfserr = fh_verify(rqstp, dirfhp, S_IFDIR, MAY_CREATE);
244 	if (nfserr)
245 		RETURN_STATUS(nfserr);
246 
247 	/* Unfudge the mode bits */
248 	attr->ia_mode &= ~S_IFMT;
249 	if (!(attr->ia_valid & ATTR_MODE)) {
250 		attr->ia_valid |= ATTR_MODE;
251 		attr->ia_mode = S_IFREG;
252 	} else {
253 		attr->ia_mode = (attr->ia_mode & ~S_IFMT) | S_IFREG;
254 	}
255 
256 	/* Now create the file and set attributes */
257 	nfserr = nfsd_create_v3(rqstp, dirfhp, argp->name, argp->len,
258 				attr, newfhp,
259 				argp->createmode, argp->verf, NULL);
260 
261 	RETURN_STATUS(nfserr);
262 }
263 
264 /*
265  * Make directory. This operation is not idempotent.
266  */
267 static int
268 nfsd3_proc_mkdir(struct svc_rqst *rqstp, struct nfsd3_createargs *argp,
269 					 struct nfsd3_diropres   *resp)
270 {
271 	int	nfserr;
272 
273 	dprintk("nfsd: MKDIR(3)    %s %.*s\n",
274 				SVCFH_fmt(&argp->fh),
275 				argp->len,
276 				argp->name);
277 
278 	argp->attrs.ia_valid &= ~ATTR_SIZE;
279 	fh_copy(&resp->dirfh, &argp->fh);
280 	fh_init(&resp->fh, NFS3_FHSIZE);
281 	nfserr = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len,
282 				    &argp->attrs, S_IFDIR, 0, &resp->fh);
283 
284 	RETURN_STATUS(nfserr);
285 }
286 
287 static int
288 nfsd3_proc_symlink(struct svc_rqst *rqstp, struct nfsd3_symlinkargs *argp,
289 					   struct nfsd3_diropres    *resp)
290 {
291 	int	nfserr;
292 
293 	dprintk("nfsd: SYMLINK(3)  %s %.*s -> %.*s\n",
294 				SVCFH_fmt(&argp->ffh),
295 				argp->flen, argp->fname,
296 				argp->tlen, argp->tname);
297 
298 	fh_copy(&resp->dirfh, &argp->ffh);
299 	fh_init(&resp->fh, NFS3_FHSIZE);
300 	nfserr = nfsd_symlink(rqstp, &resp->dirfh, argp->fname, argp->flen,
301 						   argp->tname, argp->tlen,
302 						   &resp->fh, &argp->attrs);
303 	RETURN_STATUS(nfserr);
304 }
305 
306 /*
307  * Make socket/fifo/device.
308  */
309 static int
310 nfsd3_proc_mknod(struct svc_rqst *rqstp, struct nfsd3_mknodargs *argp,
311 					 struct nfsd3_diropres  *resp)
312 {
313 	int	nfserr, type;
314 	dev_t	rdev = 0;
315 
316 	dprintk("nfsd: MKNOD(3)    %s %.*s\n",
317 				SVCFH_fmt(&argp->fh),
318 				argp->len,
319 				argp->name);
320 
321 	fh_copy(&resp->dirfh, &argp->fh);
322 	fh_init(&resp->fh, NFS3_FHSIZE);
323 
324 	if (argp->ftype == 0 || argp->ftype >= NF3BAD)
325 		RETURN_STATUS(nfserr_inval);
326 	if (argp->ftype == NF3CHR || argp->ftype == NF3BLK) {
327 		rdev = MKDEV(argp->major, argp->minor);
328 		if (MAJOR(rdev) != argp->major ||
329 		    MINOR(rdev) != argp->minor)
330 			RETURN_STATUS(nfserr_inval);
331 	} else
332 		if (argp->ftype != NF3SOCK && argp->ftype != NF3FIFO)
333 			RETURN_STATUS(nfserr_inval);
334 
335 	type = nfs3_ftypes[argp->ftype];
336 	nfserr = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len,
337 				    &argp->attrs, type, rdev, &resp->fh);
338 
339 	RETURN_STATUS(nfserr);
340 }
341 
342 /*
343  * Remove file/fifo/socket etc.
344  */
345 static int
346 nfsd3_proc_remove(struct svc_rqst *rqstp, struct nfsd3_diropargs *argp,
347 					  struct nfsd3_attrstat  *resp)
348 {
349 	int	nfserr;
350 
351 	dprintk("nfsd: REMOVE(3)   %s %.*s\n",
352 				SVCFH_fmt(&argp->fh),
353 				argp->len,
354 				argp->name);
355 
356 	/* Unlink. -S_IFDIR means file must not be a directory */
357 	fh_copy(&resp->fh, &argp->fh);
358 	nfserr = nfsd_unlink(rqstp, &resp->fh, -S_IFDIR, argp->name, argp->len);
359 	RETURN_STATUS(nfserr);
360 }
361 
362 /*
363  * Remove a directory
364  */
365 static int
366 nfsd3_proc_rmdir(struct svc_rqst *rqstp, struct nfsd3_diropargs *argp,
367 					 struct nfsd3_attrstat  *resp)
368 {
369 	int	nfserr;
370 
371 	dprintk("nfsd: RMDIR(3)    %s %.*s\n",
372 				SVCFH_fmt(&argp->fh),
373 				argp->len,
374 				argp->name);
375 
376 	fh_copy(&resp->fh, &argp->fh);
377 	nfserr = nfsd_unlink(rqstp, &resp->fh, S_IFDIR, argp->name, argp->len);
378 	RETURN_STATUS(nfserr);
379 }
380 
381 static int
382 nfsd3_proc_rename(struct svc_rqst *rqstp, struct nfsd3_renameargs *argp,
383 					  struct nfsd3_renameres  *resp)
384 {
385 	int	nfserr;
386 
387 	dprintk("nfsd: RENAME(3)   %s %.*s ->\n",
388 				SVCFH_fmt(&argp->ffh),
389 				argp->flen,
390 				argp->fname);
391 	dprintk("nfsd: -> %s %.*s\n",
392 				SVCFH_fmt(&argp->tfh),
393 				argp->tlen,
394 				argp->tname);
395 
396 	fh_copy(&resp->ffh, &argp->ffh);
397 	fh_copy(&resp->tfh, &argp->tfh);
398 	nfserr = nfsd_rename(rqstp, &resp->ffh, argp->fname, argp->flen,
399 				    &resp->tfh, argp->tname, argp->tlen);
400 	RETURN_STATUS(nfserr);
401 }
402 
403 static int
404 nfsd3_proc_link(struct svc_rqst *rqstp, struct nfsd3_linkargs *argp,
405 					struct nfsd3_linkres  *resp)
406 {
407 	int	nfserr;
408 
409 	dprintk("nfsd: LINK(3)     %s ->\n",
410 				SVCFH_fmt(&argp->ffh));
411 	dprintk("nfsd:   -> %s %.*s\n",
412 				SVCFH_fmt(&argp->tfh),
413 				argp->tlen,
414 				argp->tname);
415 
416 	fh_copy(&resp->fh,  &argp->ffh);
417 	fh_copy(&resp->tfh, &argp->tfh);
418 	nfserr = nfsd_link(rqstp, &resp->tfh, argp->tname, argp->tlen,
419 				  &resp->fh);
420 	RETURN_STATUS(nfserr);
421 }
422 
423 /*
424  * Read a portion of a directory.
425  */
426 static int
427 nfsd3_proc_readdir(struct svc_rqst *rqstp, struct nfsd3_readdirargs *argp,
428 					   struct nfsd3_readdirres  *resp)
429 {
430 	int		nfserr, count;
431 
432 	dprintk("nfsd: READDIR(3)  %s %d bytes at %d\n",
433 				SVCFH_fmt(&argp->fh),
434 				argp->count, (u32) argp->cookie);
435 
436 	/* Make sure we've room for the NULL ptr & eof flag, and shrink to
437 	 * client read size */
438 	count = (argp->count >> 2) - 2;
439 
440 	/* Read directory and encode entries on the fly */
441 	fh_copy(&resp->fh, &argp->fh);
442 
443 	resp->buflen = count;
444 	resp->common.err = nfs_ok;
445 	resp->buffer = argp->buffer;
446 	resp->rqstp = rqstp;
447 	nfserr = nfsd_readdir(rqstp, &resp->fh, (loff_t*) &argp->cookie,
448 					&resp->common, nfs3svc_encode_entry);
449 	memcpy(resp->verf, argp->verf, 8);
450 	resp->count = resp->buffer - argp->buffer;
451 	if (resp->offset)
452 		xdr_encode_hyper(resp->offset, argp->cookie);
453 
454 	RETURN_STATUS(nfserr);
455 }
456 
457 /*
458  * Read a portion of a directory, including file handles and attrs.
459  * For now, we choose to ignore the dircount parameter.
460  */
461 static int
462 nfsd3_proc_readdirplus(struct svc_rqst *rqstp, struct nfsd3_readdirargs *argp,
463 					       struct nfsd3_readdirres  *resp)
464 {
465 	int	nfserr, count = 0;
466 	loff_t	offset;
467 	int	i;
468 	caddr_t	page_addr = NULL;
469 
470 	dprintk("nfsd: READDIR+(3) %s %d bytes at %d\n",
471 				SVCFH_fmt(&argp->fh),
472 				argp->count, (u32) argp->cookie);
473 
474 	/* Convert byte count to number of words (i.e. >> 2),
475 	 * and reserve room for the NULL ptr & eof flag (-2 words) */
476 	resp->count = (argp->count >> 2) - 2;
477 
478 	/* Read directory and encode entries on the fly */
479 	fh_copy(&resp->fh, &argp->fh);
480 
481 	resp->common.err = nfs_ok;
482 	resp->buffer = argp->buffer;
483 	resp->buflen = resp->count;
484 	resp->rqstp = rqstp;
485 	offset = argp->cookie;
486 	nfserr = nfsd_readdir(rqstp, &resp->fh,
487 				     &offset,
488 				     &resp->common,
489 				     nfs3svc_encode_entry_plus);
490 	memcpy(resp->verf, argp->verf, 8);
491 	for (i=1; i<rqstp->rq_resused ; i++) {
492 		page_addr = page_address(rqstp->rq_respages[i]);
493 
494 		if (((caddr_t)resp->buffer >= page_addr) &&
495 		    ((caddr_t)resp->buffer < page_addr + PAGE_SIZE)) {
496 			count += (caddr_t)resp->buffer - page_addr;
497 			break;
498 		}
499 		count += PAGE_SIZE;
500 	}
501 	resp->count = count >> 2;
502 	if (resp->offset) {
503 		if (unlikely(resp->offset1)) {
504 			/* we ended up with offset on a page boundary */
505 			*resp->offset = htonl(offset >> 32);
506 			*resp->offset1 = htonl(offset & 0xffffffff);
507 			resp->offset1 = NULL;
508 		} else {
509 			xdr_encode_hyper(resp->offset, offset);
510 		}
511 	}
512 
513 	RETURN_STATUS(nfserr);
514 }
515 
516 /*
517  * Get file system stats
518  */
519 static int
520 nfsd3_proc_fsstat(struct svc_rqst * rqstp, struct nfsd_fhandle    *argp,
521 					   struct nfsd3_fsstatres *resp)
522 {
523 	int	nfserr;
524 
525 	dprintk("nfsd: FSSTAT(3)   %s\n",
526 				SVCFH_fmt(&argp->fh));
527 
528 	nfserr = nfsd_statfs(rqstp, &argp->fh, &resp->stats);
529 	fh_put(&argp->fh);
530 	RETURN_STATUS(nfserr);
531 }
532 
533 /*
534  * Get file system info
535  */
536 static int
537 nfsd3_proc_fsinfo(struct svc_rqst * rqstp, struct nfsd_fhandle    *argp,
538 					   struct nfsd3_fsinfores *resp)
539 {
540 	int	nfserr;
541 
542 	dprintk("nfsd: FSINFO(3)   %s\n",
543 				SVCFH_fmt(&argp->fh));
544 
545 	resp->f_rtmax  = NFSSVC_MAXBLKSIZE;
546 	resp->f_rtpref = NFSSVC_MAXBLKSIZE;
547 	resp->f_rtmult = PAGE_SIZE;
548 	resp->f_wtmax  = NFSSVC_MAXBLKSIZE;
549 	resp->f_wtpref = NFSSVC_MAXBLKSIZE;
550 	resp->f_wtmult = PAGE_SIZE;
551 	resp->f_dtpref = PAGE_SIZE;
552 	resp->f_maxfilesize = ~(u32) 0;
553 	resp->f_properties = NFS3_FSF_DEFAULT;
554 
555 	nfserr = fh_verify(rqstp, &argp->fh, 0, MAY_NOP);
556 
557 	/* Check special features of the file system. May request
558 	 * different read/write sizes for file systems known to have
559 	 * problems with large blocks */
560 	if (nfserr == 0) {
561 		struct super_block *sb = argp->fh.fh_dentry->d_inode->i_sb;
562 
563 		/* Note that we don't care for remote fs's here */
564 		if (sb->s_magic == 0x4d44 /* MSDOS_SUPER_MAGIC */) {
565 			resp->f_properties = NFS3_FSF_BILLYBOY;
566 		}
567 		resp->f_maxfilesize = sb->s_maxbytes;
568 	}
569 
570 	fh_put(&argp->fh);
571 	RETURN_STATUS(nfserr);
572 }
573 
574 /*
575  * Get pathconf info for the specified file
576  */
577 static int
578 nfsd3_proc_pathconf(struct svc_rqst * rqstp, struct nfsd_fhandle      *argp,
579 					     struct nfsd3_pathconfres *resp)
580 {
581 	int	nfserr;
582 
583 	dprintk("nfsd: PATHCONF(3) %s\n",
584 				SVCFH_fmt(&argp->fh));
585 
586 	/* Set default pathconf */
587 	resp->p_link_max = 255;		/* at least */
588 	resp->p_name_max = 255;		/* at least */
589 	resp->p_no_trunc = 0;
590 	resp->p_chown_restricted = 1;
591 	resp->p_case_insensitive = 0;
592 	resp->p_case_preserving = 1;
593 
594 	nfserr = fh_verify(rqstp, &argp->fh, 0, MAY_NOP);
595 
596 	if (nfserr == 0) {
597 		struct super_block *sb = argp->fh.fh_dentry->d_inode->i_sb;
598 
599 		/* Note that we don't care for remote fs's here */
600 		switch (sb->s_magic) {
601 		case EXT2_SUPER_MAGIC:
602 			resp->p_link_max = EXT2_LINK_MAX;
603 			resp->p_name_max = EXT2_NAME_LEN;
604 			break;
605 		case 0x4d44:	/* MSDOS_SUPER_MAGIC */
606 			resp->p_case_insensitive = 1;
607 			resp->p_case_preserving  = 0;
608 			break;
609 		}
610 	}
611 
612 	fh_put(&argp->fh);
613 	RETURN_STATUS(nfserr);
614 }
615 
616 
617 /*
618  * Commit a file (range) to stable storage.
619  */
620 static int
621 nfsd3_proc_commit(struct svc_rqst * rqstp, struct nfsd3_commitargs *argp,
622 					   struct nfsd3_commitres  *resp)
623 {
624 	int	nfserr;
625 
626 	dprintk("nfsd: COMMIT(3)   %s %u@%Lu\n",
627 				SVCFH_fmt(&argp->fh),
628 				argp->count,
629 				(unsigned long long) argp->offset);
630 
631 	if (argp->offset > NFS_OFFSET_MAX)
632 		RETURN_STATUS(nfserr_inval);
633 
634 	fh_copy(&resp->fh, &argp->fh);
635 	nfserr = nfsd_commit(rqstp, &resp->fh, argp->offset, argp->count);
636 
637 	RETURN_STATUS(nfserr);
638 }
639 
640 
641 /*
642  * NFSv3 Server procedures.
643  * Only the results of non-idempotent operations are cached.
644  */
645 #define nfs3svc_decode_voidargs		NULL
646 #define nfs3svc_release_void		NULL
647 #define nfs3svc_decode_fhandleargs	nfs3svc_decode_fhandle
648 #define nfs3svc_encode_attrstatres	nfs3svc_encode_attrstat
649 #define nfs3svc_encode_wccstatres	nfs3svc_encode_wccstat
650 #define nfsd3_mkdirargs			nfsd3_createargs
651 #define nfsd3_readdirplusargs		nfsd3_readdirargs
652 #define nfsd3_fhandleargs		nfsd_fhandle
653 #define nfsd3_fhandleres		nfsd3_attrstat
654 #define nfsd3_attrstatres		nfsd3_attrstat
655 #define nfsd3_wccstatres		nfsd3_attrstat
656 #define nfsd3_createres			nfsd3_diropres
657 #define nfsd3_voidres			nfsd3_voidargs
658 struct nfsd3_voidargs { int dummy; };
659 
660 #define PROC(name, argt, rest, relt, cache, respsize)	\
661  { (svc_procfunc) nfsd3_proc_##name,		\
662    (kxdrproc_t) nfs3svc_decode_##argt##args,	\
663    (kxdrproc_t) nfs3svc_encode_##rest##res,	\
664    (kxdrproc_t) nfs3svc_release_##relt,		\
665    sizeof(struct nfsd3_##argt##args),		\
666    sizeof(struct nfsd3_##rest##res),		\
667    0,						\
668    cache,					\
669    respsize,					\
670  }
671 
672 #define ST 1		/* status*/
673 #define FH 17		/* filehandle with length */
674 #define AT 21		/* attributes */
675 #define pAT (1+AT)	/* post attributes - conditional */
676 #define WC (7+pAT)	/* WCC attributes */
677 
678 static struct svc_procedure		nfsd_procedures3[22] = {
679   PROC(null,	 void,		void,		void,	  RC_NOCACHE, ST),
680   PROC(getattr,	 fhandle,	attrstat,	fhandle,  RC_NOCACHE, ST+AT),
681   PROC(setattr,  sattr,		wccstat,	fhandle,  RC_REPLBUFF, ST+WC),
682   PROC(lookup,	 dirop,		dirop,		fhandle2, RC_NOCACHE, ST+FH+pAT+pAT),
683   PROC(access,	 access,	access,		fhandle,  RC_NOCACHE, ST+pAT+1),
684   PROC(readlink, readlink,	readlink,	fhandle,  RC_NOCACHE, ST+pAT+1+NFS3_MAXPATHLEN/4),
685   PROC(read,	 read,		read,		fhandle,  RC_NOCACHE, ST+pAT+4+NFSSVC_MAXBLKSIZE),
686   PROC(write,	 write,		write,		fhandle,  RC_REPLBUFF, ST+WC+4),
687   PROC(create,	 create,	create,		fhandle2, RC_REPLBUFF, ST+(1+FH+pAT)+WC),
688   PROC(mkdir,	 mkdir,		create,		fhandle2, RC_REPLBUFF, ST+(1+FH+pAT)+WC),
689   PROC(symlink,	 symlink,	create,		fhandle2, RC_REPLBUFF, ST+(1+FH+pAT)+WC),
690   PROC(mknod,	 mknod,		create,		fhandle2, RC_REPLBUFF, ST+(1+FH+pAT)+WC),
691   PROC(remove,	 dirop,		wccstat,	fhandle,  RC_REPLBUFF, ST+WC),
692   PROC(rmdir,	 dirop,		wccstat,	fhandle,  RC_REPLBUFF, ST+WC),
693   PROC(rename,	 rename,	rename,		fhandle2, RC_REPLBUFF, ST+WC+WC),
694   PROC(link,	 link,		link,		fhandle2, RC_REPLBUFF, ST+pAT+WC),
695   PROC(readdir,	 readdir,	readdir,	fhandle,  RC_NOCACHE, 0),
696   PROC(readdirplus,readdirplus,	readdir,	fhandle,  RC_NOCACHE, 0),
697   PROC(fsstat,	 fhandle,	fsstat,		void,     RC_NOCACHE, ST+pAT+2*6+1),
698   PROC(fsinfo,   fhandle,	fsinfo,		void,     RC_NOCACHE, ST+pAT+12),
699   PROC(pathconf, fhandle,	pathconf,	void,     RC_NOCACHE, ST+pAT+6),
700   PROC(commit,	 commit,	commit,		fhandle,  RC_NOCACHE, ST+WC+2),
701 };
702 
703 struct svc_version	nfsd_version3 = {
704 		.vs_vers	= 3,
705 		.vs_nproc	= 22,
706 		.vs_proc	= nfsd_procedures3,
707 		.vs_dispatch	= nfsd_dispatch,
708 		.vs_xdrsize	= NFS3_SVC_XDRSIZE,
709 };
710