1 /*
2  * Process version 3 NFS requests.
3  *
4  * Copyright (C) 1996, 1997, 1998 Olaf Kirch <okir@monad.swb.de>
5  */
6 
7 #include <linux/fs.h>
8 #include <linux/ext2_fs.h>
9 #include <linux/magic.h>
10 
11 #include "cache.h"
12 #include "xdr3.h"
13 #include "vfs.h"
14 
15 #define NFSDDBG_FACILITY		NFSDDBG_PROC
16 
17 #define RETURN_STATUS(st)	{ resp->status = (st); return (st); }
18 
19 static int	nfs3_ftypes[] = {
20 	0,			/* NF3NON */
21 	S_IFREG,		/* NF3REG */
22 	S_IFDIR,		/* NF3DIR */
23 	S_IFBLK,		/* NF3BLK */
24 	S_IFCHR,		/* NF3CHR */
25 	S_IFLNK,		/* NF3LNK */
26 	S_IFSOCK,		/* NF3SOCK */
27 	S_IFIFO,		/* NF3FIFO */
28 };
29 
30 /*
31  * NULL call.
32  */
33 static __be32
nfsd3_proc_null(struct svc_rqst * rqstp,void * argp,void * resp)34 nfsd3_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
35 {
36 	return nfs_ok;
37 }
38 
39 /*
40  * Get a file's attributes
41  */
42 static __be32
nfsd3_proc_getattr(struct svc_rqst * rqstp,struct nfsd_fhandle * argp,struct nfsd3_attrstat * resp)43 nfsd3_proc_getattr(struct svc_rqst *rqstp, struct nfsd_fhandle  *argp,
44 					   struct nfsd3_attrstat *resp)
45 {
46 	int	err;
47 	__be32	nfserr;
48 
49 	dprintk("nfsd: GETATTR(3)  %s\n",
50 		SVCFH_fmt(&argp->fh));
51 
52 	fh_copy(&resp->fh, &argp->fh);
53 	nfserr = fh_verify(rqstp, &resp->fh, 0,
54 			NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT);
55 	if (nfserr)
56 		RETURN_STATUS(nfserr);
57 
58 	err = vfs_getattr(resp->fh.fh_export->ex_path.mnt,
59 			  resp->fh.fh_dentry, &resp->stat);
60 	nfserr = nfserrno(err);
61 
62 	RETURN_STATUS(nfserr);
63 }
64 
65 /*
66  * Set a file's attributes
67  */
68 static __be32
nfsd3_proc_setattr(struct svc_rqst * rqstp,struct nfsd3_sattrargs * argp,struct nfsd3_attrstat * resp)69 nfsd3_proc_setattr(struct svc_rqst *rqstp, struct nfsd3_sattrargs *argp,
70 					   struct nfsd3_attrstat  *resp)
71 {
72 	__be32	nfserr;
73 
74 	dprintk("nfsd: SETATTR(3)  %s\n",
75 				SVCFH_fmt(&argp->fh));
76 
77 	fh_copy(&resp->fh, &argp->fh);
78 	nfserr = nfsd_setattr(rqstp, &resp->fh, &argp->attrs,
79 			      argp->check_guard, argp->guardtime);
80 	RETURN_STATUS(nfserr);
81 }
82 
83 /*
84  * Look up a path name component
85  */
86 static __be32
nfsd3_proc_lookup(struct svc_rqst * rqstp,struct nfsd3_diropargs * argp,struct nfsd3_diropres * resp)87 nfsd3_proc_lookup(struct svc_rqst *rqstp, struct nfsd3_diropargs *argp,
88 					  struct nfsd3_diropres  *resp)
89 {
90 	__be32	nfserr;
91 
92 	dprintk("nfsd: LOOKUP(3)   %s %.*s\n",
93 				SVCFH_fmt(&argp->fh),
94 				argp->len,
95 				argp->name);
96 
97 	fh_copy(&resp->dirfh, &argp->fh);
98 	fh_init(&resp->fh, NFS3_FHSIZE);
99 
100 	nfserr = nfsd_lookup(rqstp, &resp->dirfh,
101 				    argp->name,
102 				    argp->len,
103 				    &resp->fh);
104 	RETURN_STATUS(nfserr);
105 }
106 
107 /*
108  * Check file access
109  */
110 static __be32
nfsd3_proc_access(struct svc_rqst * rqstp,struct nfsd3_accessargs * argp,struct nfsd3_accessres * resp)111 nfsd3_proc_access(struct svc_rqst *rqstp, struct nfsd3_accessargs *argp,
112 					  struct nfsd3_accessres *resp)
113 {
114 	__be32	nfserr;
115 
116 	dprintk("nfsd: ACCESS(3)   %s 0x%x\n",
117 				SVCFH_fmt(&argp->fh),
118 				argp->access);
119 
120 	fh_copy(&resp->fh, &argp->fh);
121 	resp->access = argp->access;
122 	nfserr = nfsd_access(rqstp, &resp->fh, &resp->access, NULL);
123 	RETURN_STATUS(nfserr);
124 }
125 
126 /*
127  * Read a symlink.
128  */
129 static __be32
nfsd3_proc_readlink(struct svc_rqst * rqstp,struct nfsd3_readlinkargs * argp,struct nfsd3_readlinkres * resp)130 nfsd3_proc_readlink(struct svc_rqst *rqstp, struct nfsd3_readlinkargs *argp,
131 					   struct nfsd3_readlinkres *resp)
132 {
133 	__be32 nfserr;
134 
135 	dprintk("nfsd: READLINK(3) %s\n", SVCFH_fmt(&argp->fh));
136 
137 	/* Read the symlink. */
138 	fh_copy(&resp->fh, &argp->fh);
139 	resp->len = NFS3_MAXPATHLEN;
140 	nfserr = nfsd_readlink(rqstp, &resp->fh, argp->buffer, &resp->len);
141 	RETURN_STATUS(nfserr);
142 }
143 
144 /*
145  * Read a portion of a file.
146  */
147 static __be32
nfsd3_proc_read(struct svc_rqst * rqstp,struct nfsd3_readargs * argp,struct nfsd3_readres * resp)148 nfsd3_proc_read(struct svc_rqst *rqstp, struct nfsd3_readargs *argp,
149 				        struct nfsd3_readres  *resp)
150 {
151 	__be32	nfserr;
152 	u32	max_blocksize = svc_max_payload(rqstp);
153 
154 	dprintk("nfsd: READ(3) %s %lu bytes at %Lu\n",
155 				SVCFH_fmt(&argp->fh),
156 				(unsigned long) argp->count,
157 				(unsigned long long) argp->offset);
158 
159 	/* Obtain buffer pointer for payload.
160 	 * 1 (status) + 22 (post_op_attr) + 1 (count) + 1 (eof)
161 	 * + 1 (xdr opaque byte count) = 26
162 	 */
163 
164 	resp->count = argp->count;
165 	if (max_blocksize < resp->count)
166 		resp->count = max_blocksize;
167 
168 	svc_reserve_auth(rqstp, ((1 + NFS3_POST_OP_ATTR_WORDS + 3)<<2) + resp->count +4);
169 
170 	fh_copy(&resp->fh, &argp->fh);
171 	nfserr = nfsd_read(rqstp, &resp->fh,
172 				  argp->offset,
173 			   	  rqstp->rq_vec, argp->vlen,
174 				  &resp->count);
175 	if (nfserr == 0) {
176 		struct inode	*inode = resp->fh.fh_dentry->d_inode;
177 
178 		resp->eof = (argp->offset + resp->count) >= inode->i_size;
179 	}
180 
181 	RETURN_STATUS(nfserr);
182 }
183 
184 /*
185  * Write data to a file
186  */
187 static __be32
nfsd3_proc_write(struct svc_rqst * rqstp,struct nfsd3_writeargs * argp,struct nfsd3_writeres * resp)188 nfsd3_proc_write(struct svc_rqst *rqstp, struct nfsd3_writeargs *argp,
189 					 struct nfsd3_writeres  *resp)
190 {
191 	__be32	nfserr;
192 	unsigned long cnt = argp->len;
193 
194 	dprintk("nfsd: WRITE(3)    %s %d bytes at %Lu%s\n",
195 				SVCFH_fmt(&argp->fh),
196 				argp->len,
197 				(unsigned long long) argp->offset,
198 				argp->stable? " stable" : "");
199 
200 	fh_copy(&resp->fh, &argp->fh);
201 	resp->committed = argp->stable;
202 	nfserr = nfsd_write(rqstp, &resp->fh, NULL,
203 				   argp->offset,
204 				   rqstp->rq_vec, argp->vlen,
205 				   &cnt,
206 				   &resp->committed);
207 	resp->count = cnt;
208 	RETURN_STATUS(nfserr);
209 }
210 
211 /*
212  * With NFSv3, CREATE processing is a lot easier than with NFSv2.
213  * At least in theory; we'll see how it fares in practice when the
214  * first reports about SunOS compatibility problems start to pour in...
215  */
216 static __be32
nfsd3_proc_create(struct svc_rqst * rqstp,struct nfsd3_createargs * argp,struct nfsd3_diropres * resp)217 nfsd3_proc_create(struct svc_rqst *rqstp, struct nfsd3_createargs *argp,
218 					  struct nfsd3_diropres   *resp)
219 {
220 	svc_fh		*dirfhp, *newfhp = NULL;
221 	struct iattr	*attr;
222 	__be32		nfserr;
223 
224 	dprintk("nfsd: CREATE(3)   %s %.*s\n",
225 				SVCFH_fmt(&argp->fh),
226 				argp->len,
227 				argp->name);
228 
229 	dirfhp = fh_copy(&resp->dirfh, &argp->fh);
230 	newfhp = fh_init(&resp->fh, NFS3_FHSIZE);
231 	attr   = &argp->attrs;
232 
233 	/* Get the directory inode */
234 	nfserr = fh_verify(rqstp, dirfhp, S_IFDIR, NFSD_MAY_CREATE);
235 	if (nfserr)
236 		RETURN_STATUS(nfserr);
237 
238 	/* Unfudge the mode bits */
239 	attr->ia_mode &= ~S_IFMT;
240 	if (!(attr->ia_valid & ATTR_MODE)) {
241 		attr->ia_valid |= ATTR_MODE;
242 		attr->ia_mode = S_IFREG;
243 	} else {
244 		attr->ia_mode = (attr->ia_mode & ~S_IFMT) | S_IFREG;
245 	}
246 
247 	/* Now create the file and set attributes */
248 	nfserr = do_nfsd_create(rqstp, dirfhp, argp->name, argp->len,
249 				attr, newfhp,
250 				argp->createmode, argp->verf, NULL, NULL);
251 
252 	RETURN_STATUS(nfserr);
253 }
254 
255 /*
256  * Make directory. This operation is not idempotent.
257  */
258 static __be32
nfsd3_proc_mkdir(struct svc_rqst * rqstp,struct nfsd3_createargs * argp,struct nfsd3_diropres * resp)259 nfsd3_proc_mkdir(struct svc_rqst *rqstp, struct nfsd3_createargs *argp,
260 					 struct nfsd3_diropres   *resp)
261 {
262 	__be32	nfserr;
263 
264 	dprintk("nfsd: MKDIR(3)    %s %.*s\n",
265 				SVCFH_fmt(&argp->fh),
266 				argp->len,
267 				argp->name);
268 
269 	argp->attrs.ia_valid &= ~ATTR_SIZE;
270 	fh_copy(&resp->dirfh, &argp->fh);
271 	fh_init(&resp->fh, NFS3_FHSIZE);
272 	nfserr = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len,
273 				    &argp->attrs, S_IFDIR, 0, &resp->fh);
274 	fh_unlock(&resp->dirfh);
275 	RETURN_STATUS(nfserr);
276 }
277 
278 static __be32
nfsd3_proc_symlink(struct svc_rqst * rqstp,struct nfsd3_symlinkargs * argp,struct nfsd3_diropres * resp)279 nfsd3_proc_symlink(struct svc_rqst *rqstp, struct nfsd3_symlinkargs *argp,
280 					   struct nfsd3_diropres    *resp)
281 {
282 	__be32	nfserr;
283 
284 	dprintk("nfsd: SYMLINK(3)  %s %.*s -> %.*s\n",
285 				SVCFH_fmt(&argp->ffh),
286 				argp->flen, argp->fname,
287 				argp->tlen, argp->tname);
288 
289 	fh_copy(&resp->dirfh, &argp->ffh);
290 	fh_init(&resp->fh, NFS3_FHSIZE);
291 	nfserr = nfsd_symlink(rqstp, &resp->dirfh, argp->fname, argp->flen,
292 						   argp->tname, argp->tlen,
293 						   &resp->fh, &argp->attrs);
294 	RETURN_STATUS(nfserr);
295 }
296 
297 /*
298  * Make socket/fifo/device.
299  */
300 static __be32
nfsd3_proc_mknod(struct svc_rqst * rqstp,struct nfsd3_mknodargs * argp,struct nfsd3_diropres * resp)301 nfsd3_proc_mknod(struct svc_rqst *rqstp, struct nfsd3_mknodargs *argp,
302 					 struct nfsd3_diropres  *resp)
303 {
304 	__be32	nfserr;
305 	int type;
306 	dev_t	rdev = 0;
307 
308 	dprintk("nfsd: MKNOD(3)    %s %.*s\n",
309 				SVCFH_fmt(&argp->fh),
310 				argp->len,
311 				argp->name);
312 
313 	fh_copy(&resp->dirfh, &argp->fh);
314 	fh_init(&resp->fh, NFS3_FHSIZE);
315 
316 	if (argp->ftype == 0 || argp->ftype >= NF3BAD)
317 		RETURN_STATUS(nfserr_inval);
318 	if (argp->ftype == NF3CHR || argp->ftype == NF3BLK) {
319 		rdev = MKDEV(argp->major, argp->minor);
320 		if (MAJOR(rdev) != argp->major ||
321 		    MINOR(rdev) != argp->minor)
322 			RETURN_STATUS(nfserr_inval);
323 	} else
324 		if (argp->ftype != NF3SOCK && argp->ftype != NF3FIFO)
325 			RETURN_STATUS(nfserr_inval);
326 
327 	type = nfs3_ftypes[argp->ftype];
328 	nfserr = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len,
329 				    &argp->attrs, type, rdev, &resp->fh);
330 	fh_unlock(&resp->dirfh);
331 	RETURN_STATUS(nfserr);
332 }
333 
334 /*
335  * Remove file/fifo/socket etc.
336  */
337 static __be32
nfsd3_proc_remove(struct svc_rqst * rqstp,struct nfsd3_diropargs * argp,struct nfsd3_attrstat * resp)338 nfsd3_proc_remove(struct svc_rqst *rqstp, struct nfsd3_diropargs *argp,
339 					  struct nfsd3_attrstat  *resp)
340 {
341 	__be32	nfserr;
342 
343 	dprintk("nfsd: REMOVE(3)   %s %.*s\n",
344 				SVCFH_fmt(&argp->fh),
345 				argp->len,
346 				argp->name);
347 
348 	/* Unlink. -S_IFDIR means file must not be a directory */
349 	fh_copy(&resp->fh, &argp->fh);
350 	nfserr = nfsd_unlink(rqstp, &resp->fh, -S_IFDIR, argp->name, argp->len);
351 	fh_unlock(&resp->fh);
352 	RETURN_STATUS(nfserr);
353 }
354 
355 /*
356  * Remove a directory
357  */
358 static __be32
nfsd3_proc_rmdir(struct svc_rqst * rqstp,struct nfsd3_diropargs * argp,struct nfsd3_attrstat * resp)359 nfsd3_proc_rmdir(struct svc_rqst *rqstp, struct nfsd3_diropargs *argp,
360 					 struct nfsd3_attrstat  *resp)
361 {
362 	__be32	nfserr;
363 
364 	dprintk("nfsd: RMDIR(3)    %s %.*s\n",
365 				SVCFH_fmt(&argp->fh),
366 				argp->len,
367 				argp->name);
368 
369 	fh_copy(&resp->fh, &argp->fh);
370 	nfserr = nfsd_unlink(rqstp, &resp->fh, S_IFDIR, argp->name, argp->len);
371 	fh_unlock(&resp->fh);
372 	RETURN_STATUS(nfserr);
373 }
374 
375 static __be32
nfsd3_proc_rename(struct svc_rqst * rqstp,struct nfsd3_renameargs * argp,struct nfsd3_renameres * resp)376 nfsd3_proc_rename(struct svc_rqst *rqstp, struct nfsd3_renameargs *argp,
377 					  struct nfsd3_renameres  *resp)
378 {
379 	__be32	nfserr;
380 
381 	dprintk("nfsd: RENAME(3)   %s %.*s ->\n",
382 				SVCFH_fmt(&argp->ffh),
383 				argp->flen,
384 				argp->fname);
385 	dprintk("nfsd: -> %s %.*s\n",
386 				SVCFH_fmt(&argp->tfh),
387 				argp->tlen,
388 				argp->tname);
389 
390 	fh_copy(&resp->ffh, &argp->ffh);
391 	fh_copy(&resp->tfh, &argp->tfh);
392 	nfserr = nfsd_rename(rqstp, &resp->ffh, argp->fname, argp->flen,
393 				    &resp->tfh, argp->tname, argp->tlen);
394 	RETURN_STATUS(nfserr);
395 }
396 
397 static __be32
nfsd3_proc_link(struct svc_rqst * rqstp,struct nfsd3_linkargs * argp,struct nfsd3_linkres * resp)398 nfsd3_proc_link(struct svc_rqst *rqstp, struct nfsd3_linkargs *argp,
399 					struct nfsd3_linkres  *resp)
400 {
401 	__be32	nfserr;
402 
403 	dprintk("nfsd: LINK(3)     %s ->\n",
404 				SVCFH_fmt(&argp->ffh));
405 	dprintk("nfsd:   -> %s %.*s\n",
406 				SVCFH_fmt(&argp->tfh),
407 				argp->tlen,
408 				argp->tname);
409 
410 	fh_copy(&resp->fh,  &argp->ffh);
411 	fh_copy(&resp->tfh, &argp->tfh);
412 	nfserr = nfsd_link(rqstp, &resp->tfh, argp->tname, argp->tlen,
413 				  &resp->fh);
414 	RETURN_STATUS(nfserr);
415 }
416 
417 /*
418  * Read a portion of a directory.
419  */
420 static __be32
nfsd3_proc_readdir(struct svc_rqst * rqstp,struct nfsd3_readdirargs * argp,struct nfsd3_readdirres * resp)421 nfsd3_proc_readdir(struct svc_rqst *rqstp, struct nfsd3_readdirargs *argp,
422 					   struct nfsd3_readdirres  *resp)
423 {
424 	__be32		nfserr;
425 	int		count;
426 
427 	dprintk("nfsd: READDIR(3)  %s %d bytes at %d\n",
428 				SVCFH_fmt(&argp->fh),
429 				argp->count, (u32) argp->cookie);
430 
431 	/* Make sure we've room for the NULL ptr & eof flag, and shrink to
432 	 * client read size */
433 	count = (argp->count >> 2) - 2;
434 
435 	/* Read directory and encode entries on the fly */
436 	fh_copy(&resp->fh, &argp->fh);
437 
438 	resp->buflen = count;
439 	resp->common.err = nfs_ok;
440 	resp->buffer = argp->buffer;
441 	resp->rqstp = rqstp;
442 	nfserr = nfsd_readdir(rqstp, &resp->fh, (loff_t*) &argp->cookie,
443 					&resp->common, nfs3svc_encode_entry);
444 	memcpy(resp->verf, argp->verf, 8);
445 	resp->count = resp->buffer - argp->buffer;
446 	if (resp->offset)
447 		xdr_encode_hyper(resp->offset, argp->cookie);
448 
449 	RETURN_STATUS(nfserr);
450 }
451 
452 /*
453  * Read a portion of a directory, including file handles and attrs.
454  * For now, we choose to ignore the dircount parameter.
455  */
456 static __be32
nfsd3_proc_readdirplus(struct svc_rqst * rqstp,struct nfsd3_readdirargs * argp,struct nfsd3_readdirres * resp)457 nfsd3_proc_readdirplus(struct svc_rqst *rqstp, struct nfsd3_readdirargs *argp,
458 					       struct nfsd3_readdirres  *resp)
459 {
460 	__be32	nfserr;
461 	int	count = 0;
462 	loff_t	offset;
463 	int	i;
464 	caddr_t	page_addr = NULL;
465 
466 	dprintk("nfsd: READDIR+(3) %s %d bytes at %d\n",
467 				SVCFH_fmt(&argp->fh),
468 				argp->count, (u32) argp->cookie);
469 
470 	/* Convert byte count to number of words (i.e. >> 2),
471 	 * and reserve room for the NULL ptr & eof flag (-2 words) */
472 	resp->count = (argp->count >> 2) - 2;
473 
474 	/* Read directory and encode entries on the fly */
475 	fh_copy(&resp->fh, &argp->fh);
476 
477 	resp->common.err = nfs_ok;
478 	resp->buffer = argp->buffer;
479 	resp->buflen = resp->count;
480 	resp->rqstp = rqstp;
481 	offset = argp->cookie;
482 	nfserr = nfsd_readdir(rqstp, &resp->fh,
483 				     &offset,
484 				     &resp->common,
485 				     nfs3svc_encode_entry_plus);
486 	memcpy(resp->verf, argp->verf, 8);
487 	for (i=1; i<rqstp->rq_resused ; i++) {
488 		page_addr = page_address(rqstp->rq_respages[i]);
489 
490 		if (((caddr_t)resp->buffer >= page_addr) &&
491 		    ((caddr_t)resp->buffer < page_addr + PAGE_SIZE)) {
492 			count += (caddr_t)resp->buffer - page_addr;
493 			break;
494 		}
495 		count += PAGE_SIZE;
496 	}
497 	resp->count = count >> 2;
498 	if (resp->offset) {
499 		if (unlikely(resp->offset1)) {
500 			/* we ended up with offset on a page boundary */
501 			*resp->offset = htonl(offset >> 32);
502 			*resp->offset1 = htonl(offset & 0xffffffff);
503 			resp->offset1 = NULL;
504 		} else {
505 			xdr_encode_hyper(resp->offset, offset);
506 		}
507 	}
508 
509 	RETURN_STATUS(nfserr);
510 }
511 
512 /*
513  * Get file system stats
514  */
515 static __be32
nfsd3_proc_fsstat(struct svc_rqst * rqstp,struct nfsd_fhandle * argp,struct nfsd3_fsstatres * resp)516 nfsd3_proc_fsstat(struct svc_rqst * rqstp, struct nfsd_fhandle    *argp,
517 					   struct nfsd3_fsstatres *resp)
518 {
519 	__be32	nfserr;
520 
521 	dprintk("nfsd: FSSTAT(3)   %s\n",
522 				SVCFH_fmt(&argp->fh));
523 
524 	nfserr = nfsd_statfs(rqstp, &argp->fh, &resp->stats, 0);
525 	fh_put(&argp->fh);
526 	RETURN_STATUS(nfserr);
527 }
528 
529 /*
530  * Get file system info
531  */
532 static __be32
nfsd3_proc_fsinfo(struct svc_rqst * rqstp,struct nfsd_fhandle * argp,struct nfsd3_fsinfores * resp)533 nfsd3_proc_fsinfo(struct svc_rqst * rqstp, struct nfsd_fhandle    *argp,
534 					   struct nfsd3_fsinfores *resp)
535 {
536 	__be32	nfserr;
537 	u32	max_blocksize = svc_max_payload(rqstp);
538 
539 	dprintk("nfsd: FSINFO(3)   %s\n",
540 				SVCFH_fmt(&argp->fh));
541 
542 	resp->f_rtmax  = max_blocksize;
543 	resp->f_rtpref = max_blocksize;
544 	resp->f_rtmult = PAGE_SIZE;
545 	resp->f_wtmax  = max_blocksize;
546 	resp->f_wtpref = max_blocksize;
547 	resp->f_wtmult = PAGE_SIZE;
548 	resp->f_dtpref = PAGE_SIZE;
549 	resp->f_maxfilesize = ~(u32) 0;
550 	resp->f_properties = NFS3_FSF_DEFAULT;
551 
552 	nfserr = fh_verify(rqstp, &argp->fh, 0,
553 			NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT);
554 
555 	/* Check special features of the file system. May request
556 	 * different read/write sizes for file systems known to have
557 	 * problems with large blocks */
558 	if (nfserr == 0) {
559 		struct super_block *sb = argp->fh.fh_dentry->d_inode->i_sb;
560 
561 		/* Note that we don't care for remote fs's here */
562 		if (sb->s_magic == MSDOS_SUPER_MAGIC) {
563 			resp->f_properties = NFS3_FSF_BILLYBOY;
564 		}
565 		resp->f_maxfilesize = sb->s_maxbytes;
566 	}
567 
568 	fh_put(&argp->fh);
569 	RETURN_STATUS(nfserr);
570 }
571 
572 /*
573  * Get pathconf info for the specified file
574  */
575 static __be32
nfsd3_proc_pathconf(struct svc_rqst * rqstp,struct nfsd_fhandle * argp,struct nfsd3_pathconfres * resp)576 nfsd3_proc_pathconf(struct svc_rqst * rqstp, struct nfsd_fhandle      *argp,
577 					     struct nfsd3_pathconfres *resp)
578 {
579 	__be32	nfserr;
580 
581 	dprintk("nfsd: PATHCONF(3) %s\n",
582 				SVCFH_fmt(&argp->fh));
583 
584 	/* Set default pathconf */
585 	resp->p_link_max = 255;		/* at least */
586 	resp->p_name_max = 255;		/* at least */
587 	resp->p_no_trunc = 0;
588 	resp->p_chown_restricted = 1;
589 	resp->p_case_insensitive = 0;
590 	resp->p_case_preserving = 1;
591 
592 	nfserr = fh_verify(rqstp, &argp->fh, 0, NFSD_MAY_NOP);
593 
594 	if (nfserr == 0) {
595 		struct super_block *sb = argp->fh.fh_dentry->d_inode->i_sb;
596 
597 		/* Note that we don't care for remote fs's here */
598 		switch (sb->s_magic) {
599 		case EXT2_SUPER_MAGIC:
600 			resp->p_link_max = EXT2_LINK_MAX;
601 			resp->p_name_max = EXT2_NAME_LEN;
602 			break;
603 		case MSDOS_SUPER_MAGIC:
604 			resp->p_case_insensitive = 1;
605 			resp->p_case_preserving  = 0;
606 			break;
607 		}
608 	}
609 
610 	fh_put(&argp->fh);
611 	RETURN_STATUS(nfserr);
612 }
613 
614 
615 /*
616  * Commit a file (range) to stable storage.
617  */
618 static __be32
nfsd3_proc_commit(struct svc_rqst * rqstp,struct nfsd3_commitargs * argp,struct nfsd3_commitres * resp)619 nfsd3_proc_commit(struct svc_rqst * rqstp, struct nfsd3_commitargs *argp,
620 					   struct nfsd3_commitres  *resp)
621 {
622 	__be32	nfserr;
623 
624 	dprintk("nfsd: COMMIT(3)   %s %u@%Lu\n",
625 				SVCFH_fmt(&argp->fh),
626 				argp->count,
627 				(unsigned long long) argp->offset);
628 
629 	if (argp->offset > NFS_OFFSET_MAX)
630 		RETURN_STATUS(nfserr_inval);
631 
632 	fh_copy(&resp->fh, &argp->fh);
633 	nfserr = nfsd_commit(rqstp, &resp->fh, argp->offset, argp->count);
634 
635 	RETURN_STATUS(nfserr);
636 }
637 
638 
639 /*
640  * NFSv3 Server procedures.
641  * Only the results of non-idempotent operations are cached.
642  */
643 #define nfs3svc_decode_fhandleargs	nfs3svc_decode_fhandle
644 #define nfs3svc_encode_attrstatres	nfs3svc_encode_attrstat
645 #define nfs3svc_encode_wccstatres	nfs3svc_encode_wccstat
646 #define nfsd3_mkdirargs			nfsd3_createargs
647 #define nfsd3_readdirplusargs		nfsd3_readdirargs
648 #define nfsd3_fhandleargs		nfsd_fhandle
649 #define nfsd3_fhandleres		nfsd3_attrstat
650 #define nfsd3_attrstatres		nfsd3_attrstat
651 #define nfsd3_wccstatres		nfsd3_attrstat
652 #define nfsd3_createres			nfsd3_diropres
653 #define nfsd3_voidres			nfsd3_voidargs
654 struct nfsd3_voidargs { int dummy; };
655 
656 #define PROC(name, argt, rest, relt, cache, respsize)	\
657  { (svc_procfunc) nfsd3_proc_##name,		\
658    (kxdrproc_t) nfs3svc_decode_##argt##args,	\
659    (kxdrproc_t) nfs3svc_encode_##rest##res,	\
660    (kxdrproc_t) nfs3svc_release_##relt,		\
661    sizeof(struct nfsd3_##argt##args),		\
662    sizeof(struct nfsd3_##rest##res),		\
663    0,						\
664    cache,					\
665    respsize,					\
666  }
667 
668 #define ST 1		/* status*/
669 #define FH 17		/* filehandle with length */
670 #define AT 21		/* attributes */
671 #define pAT (1+AT)	/* post attributes - conditional */
672 #define WC (7+pAT)	/* WCC attributes */
673 
674 static struct svc_procedure		nfsd_procedures3[22] = {
675 	[NFS3PROC_NULL] = {
676 		.pc_func = (svc_procfunc) nfsd3_proc_null,
677 		.pc_encode = (kxdrproc_t) nfs3svc_encode_voidres,
678 		.pc_argsize = sizeof(struct nfsd3_voidargs),
679 		.pc_ressize = sizeof(struct nfsd3_voidres),
680 		.pc_cachetype = RC_NOCACHE,
681 		.pc_xdrressize = ST,
682 	},
683 	[NFS3PROC_GETATTR] = {
684 		.pc_func = (svc_procfunc) nfsd3_proc_getattr,
685 		.pc_decode = (kxdrproc_t) nfs3svc_decode_fhandleargs,
686 		.pc_encode = (kxdrproc_t) nfs3svc_encode_attrstatres,
687 		.pc_release = (kxdrproc_t) nfs3svc_release_fhandle,
688 		.pc_argsize = sizeof(struct nfsd3_fhandleargs),
689 		.pc_ressize = sizeof(struct nfsd3_attrstatres),
690 		.pc_cachetype = RC_NOCACHE,
691 		.pc_xdrressize = ST+AT,
692 	},
693 	[NFS3PROC_SETATTR] = {
694 		.pc_func = (svc_procfunc) nfsd3_proc_setattr,
695 		.pc_decode = (kxdrproc_t) nfs3svc_decode_sattrargs,
696 		.pc_encode = (kxdrproc_t) nfs3svc_encode_wccstatres,
697 		.pc_release = (kxdrproc_t) nfs3svc_release_fhandle,
698 		.pc_argsize = sizeof(struct nfsd3_sattrargs),
699 		.pc_ressize = sizeof(struct nfsd3_wccstatres),
700 		.pc_cachetype = RC_REPLBUFF,
701 		.pc_xdrressize = ST+WC,
702 	},
703 	[NFS3PROC_LOOKUP] = {
704 		.pc_func = (svc_procfunc) nfsd3_proc_lookup,
705 		.pc_decode = (kxdrproc_t) nfs3svc_decode_diropargs,
706 		.pc_encode = (kxdrproc_t) nfs3svc_encode_diropres,
707 		.pc_release = (kxdrproc_t) nfs3svc_release_fhandle2,
708 		.pc_argsize = sizeof(struct nfsd3_diropargs),
709 		.pc_ressize = sizeof(struct nfsd3_diropres),
710 		.pc_cachetype = RC_NOCACHE,
711 		.pc_xdrressize = ST+FH+pAT+pAT,
712 	},
713 	[NFS3PROC_ACCESS] = {
714 		.pc_func = (svc_procfunc) nfsd3_proc_access,
715 		.pc_decode = (kxdrproc_t) nfs3svc_decode_accessargs,
716 		.pc_encode = (kxdrproc_t) nfs3svc_encode_accessres,
717 		.pc_release = (kxdrproc_t) nfs3svc_release_fhandle,
718 		.pc_argsize = sizeof(struct nfsd3_accessargs),
719 		.pc_ressize = sizeof(struct nfsd3_accessres),
720 		.pc_cachetype = RC_NOCACHE,
721 		.pc_xdrressize = ST+pAT+1,
722 	},
723 	[NFS3PROC_READLINK] = {
724 		.pc_func = (svc_procfunc) nfsd3_proc_readlink,
725 		.pc_decode = (kxdrproc_t) nfs3svc_decode_readlinkargs,
726 		.pc_encode = (kxdrproc_t) nfs3svc_encode_readlinkres,
727 		.pc_release = (kxdrproc_t) nfs3svc_release_fhandle,
728 		.pc_argsize = sizeof(struct nfsd3_readlinkargs),
729 		.pc_ressize = sizeof(struct nfsd3_readlinkres),
730 		.pc_cachetype = RC_NOCACHE,
731 		.pc_xdrressize = ST+pAT+1+NFS3_MAXPATHLEN/4,
732 	},
733 	[NFS3PROC_READ] = {
734 		.pc_func = (svc_procfunc) nfsd3_proc_read,
735 		.pc_decode = (kxdrproc_t) nfs3svc_decode_readargs,
736 		.pc_encode = (kxdrproc_t) nfs3svc_encode_readres,
737 		.pc_release = (kxdrproc_t) nfs3svc_release_fhandle,
738 		.pc_argsize = sizeof(struct nfsd3_readargs),
739 		.pc_ressize = sizeof(struct nfsd3_readres),
740 		.pc_cachetype = RC_NOCACHE,
741 		.pc_xdrressize = ST+pAT+4+NFSSVC_MAXBLKSIZE/4,
742 	},
743 	[NFS3PROC_WRITE] = {
744 		.pc_func = (svc_procfunc) nfsd3_proc_write,
745 		.pc_decode = (kxdrproc_t) nfs3svc_decode_writeargs,
746 		.pc_encode = (kxdrproc_t) nfs3svc_encode_writeres,
747 		.pc_release = (kxdrproc_t) nfs3svc_release_fhandle,
748 		.pc_argsize = sizeof(struct nfsd3_writeargs),
749 		.pc_ressize = sizeof(struct nfsd3_writeres),
750 		.pc_cachetype = RC_REPLBUFF,
751 		.pc_xdrressize = ST+WC+4,
752 	},
753 	[NFS3PROC_CREATE] = {
754 		.pc_func = (svc_procfunc) nfsd3_proc_create,
755 		.pc_decode = (kxdrproc_t) nfs3svc_decode_createargs,
756 		.pc_encode = (kxdrproc_t) nfs3svc_encode_createres,
757 		.pc_release = (kxdrproc_t) nfs3svc_release_fhandle2,
758 		.pc_argsize = sizeof(struct nfsd3_createargs),
759 		.pc_ressize = sizeof(struct nfsd3_createres),
760 		.pc_cachetype = RC_REPLBUFF,
761 		.pc_xdrressize = ST+(1+FH+pAT)+WC,
762 	},
763 	[NFS3PROC_MKDIR] = {
764 		.pc_func = (svc_procfunc) nfsd3_proc_mkdir,
765 		.pc_decode = (kxdrproc_t) nfs3svc_decode_mkdirargs,
766 		.pc_encode = (kxdrproc_t) nfs3svc_encode_createres,
767 		.pc_release = (kxdrproc_t) nfs3svc_release_fhandle2,
768 		.pc_argsize = sizeof(struct nfsd3_mkdirargs),
769 		.pc_ressize = sizeof(struct nfsd3_createres),
770 		.pc_cachetype = RC_REPLBUFF,
771 		.pc_xdrressize = ST+(1+FH+pAT)+WC,
772 	},
773 	[NFS3PROC_SYMLINK] = {
774 		.pc_func = (svc_procfunc) nfsd3_proc_symlink,
775 		.pc_decode = (kxdrproc_t) nfs3svc_decode_symlinkargs,
776 		.pc_encode = (kxdrproc_t) nfs3svc_encode_createres,
777 		.pc_release = (kxdrproc_t) nfs3svc_release_fhandle2,
778 		.pc_argsize = sizeof(struct nfsd3_symlinkargs),
779 		.pc_ressize = sizeof(struct nfsd3_createres),
780 		.pc_cachetype = RC_REPLBUFF,
781 		.pc_xdrressize = ST+(1+FH+pAT)+WC,
782 	},
783 	[NFS3PROC_MKNOD] = {
784 		.pc_func = (svc_procfunc) nfsd3_proc_mknod,
785 		.pc_decode = (kxdrproc_t) nfs3svc_decode_mknodargs,
786 		.pc_encode = (kxdrproc_t) nfs3svc_encode_createres,
787 		.pc_release = (kxdrproc_t) nfs3svc_release_fhandle2,
788 		.pc_argsize = sizeof(struct nfsd3_mknodargs),
789 		.pc_ressize = sizeof(struct nfsd3_createres),
790 		.pc_cachetype = RC_REPLBUFF,
791 		.pc_xdrressize = ST+(1+FH+pAT)+WC,
792 	},
793 	[NFS3PROC_REMOVE] = {
794 		.pc_func = (svc_procfunc) nfsd3_proc_remove,
795 		.pc_decode = (kxdrproc_t) nfs3svc_decode_diropargs,
796 		.pc_encode = (kxdrproc_t) nfs3svc_encode_wccstatres,
797 		.pc_release = (kxdrproc_t) nfs3svc_release_fhandle,
798 		.pc_argsize = sizeof(struct nfsd3_diropargs),
799 		.pc_ressize = sizeof(struct nfsd3_wccstatres),
800 		.pc_cachetype = RC_REPLBUFF,
801 		.pc_xdrressize = ST+WC,
802 	},
803 	[NFS3PROC_RMDIR] = {
804 		.pc_func = (svc_procfunc) nfsd3_proc_rmdir,
805 		.pc_decode = (kxdrproc_t) nfs3svc_decode_diropargs,
806 		.pc_encode = (kxdrproc_t) nfs3svc_encode_wccstatres,
807 		.pc_release = (kxdrproc_t) nfs3svc_release_fhandle,
808 		.pc_argsize = sizeof(struct nfsd3_diropargs),
809 		.pc_ressize = sizeof(struct nfsd3_wccstatres),
810 		.pc_cachetype = RC_REPLBUFF,
811 		.pc_xdrressize = ST+WC,
812 	},
813 	[NFS3PROC_RENAME] = {
814 		.pc_func = (svc_procfunc) nfsd3_proc_rename,
815 		.pc_decode = (kxdrproc_t) nfs3svc_decode_renameargs,
816 		.pc_encode = (kxdrproc_t) nfs3svc_encode_renameres,
817 		.pc_release = (kxdrproc_t) nfs3svc_release_fhandle2,
818 		.pc_argsize = sizeof(struct nfsd3_renameargs),
819 		.pc_ressize = sizeof(struct nfsd3_renameres),
820 		.pc_cachetype = RC_REPLBUFF,
821 		.pc_xdrressize = ST+WC+WC,
822 	},
823 	[NFS3PROC_LINK] = {
824 		.pc_func = (svc_procfunc) nfsd3_proc_link,
825 		.pc_decode = (kxdrproc_t) nfs3svc_decode_linkargs,
826 		.pc_encode = (kxdrproc_t) nfs3svc_encode_linkres,
827 		.pc_release = (kxdrproc_t) nfs3svc_release_fhandle2,
828 		.pc_argsize = sizeof(struct nfsd3_linkargs),
829 		.pc_ressize = sizeof(struct nfsd3_linkres),
830 		.pc_cachetype = RC_REPLBUFF,
831 		.pc_xdrressize = ST+pAT+WC,
832 	},
833 	[NFS3PROC_READDIR] = {
834 		.pc_func = (svc_procfunc) nfsd3_proc_readdir,
835 		.pc_decode = (kxdrproc_t) nfs3svc_decode_readdirargs,
836 		.pc_encode = (kxdrproc_t) nfs3svc_encode_readdirres,
837 		.pc_release = (kxdrproc_t) nfs3svc_release_fhandle,
838 		.pc_argsize = sizeof(struct nfsd3_readdirargs),
839 		.pc_ressize = sizeof(struct nfsd3_readdirres),
840 		.pc_cachetype = RC_NOCACHE,
841 	},
842 	[NFS3PROC_READDIRPLUS] = {
843 		.pc_func = (svc_procfunc) nfsd3_proc_readdirplus,
844 		.pc_decode = (kxdrproc_t) nfs3svc_decode_readdirplusargs,
845 		.pc_encode = (kxdrproc_t) nfs3svc_encode_readdirres,
846 		.pc_release = (kxdrproc_t) nfs3svc_release_fhandle,
847 		.pc_argsize = sizeof(struct nfsd3_readdirplusargs),
848 		.pc_ressize = sizeof(struct nfsd3_readdirres),
849 		.pc_cachetype = RC_NOCACHE,
850 	},
851 	[NFS3PROC_FSSTAT] = {
852 		.pc_func = (svc_procfunc) nfsd3_proc_fsstat,
853 		.pc_decode = (kxdrproc_t) nfs3svc_decode_fhandleargs,
854 		.pc_encode = (kxdrproc_t) nfs3svc_encode_fsstatres,
855 		.pc_argsize = sizeof(struct nfsd3_fhandleargs),
856 		.pc_ressize = sizeof(struct nfsd3_fsstatres),
857 		.pc_cachetype = RC_NOCACHE,
858 		.pc_xdrressize = ST+pAT+2*6+1,
859 	},
860 	[NFS3PROC_FSINFO] = {
861 		.pc_func = (svc_procfunc) nfsd3_proc_fsinfo,
862 		.pc_decode = (kxdrproc_t) nfs3svc_decode_fhandleargs,
863 		.pc_encode = (kxdrproc_t) nfs3svc_encode_fsinfores,
864 		.pc_argsize = sizeof(struct nfsd3_fhandleargs),
865 		.pc_ressize = sizeof(struct nfsd3_fsinfores),
866 		.pc_cachetype = RC_NOCACHE,
867 		.pc_xdrressize = ST+pAT+12,
868 	},
869 	[NFS3PROC_PATHCONF] = {
870 		.pc_func = (svc_procfunc) nfsd3_proc_pathconf,
871 		.pc_decode = (kxdrproc_t) nfs3svc_decode_fhandleargs,
872 		.pc_encode = (kxdrproc_t) nfs3svc_encode_pathconfres,
873 		.pc_argsize = sizeof(struct nfsd3_fhandleargs),
874 		.pc_ressize = sizeof(struct nfsd3_pathconfres),
875 		.pc_cachetype = RC_NOCACHE,
876 		.pc_xdrressize = ST+pAT+6,
877 	},
878 	[NFS3PROC_COMMIT] = {
879 		.pc_func = (svc_procfunc) nfsd3_proc_commit,
880 		.pc_decode = (kxdrproc_t) nfs3svc_decode_commitargs,
881 		.pc_encode = (kxdrproc_t) nfs3svc_encode_commitres,
882 		.pc_release = (kxdrproc_t) nfs3svc_release_fhandle,
883 		.pc_argsize = sizeof(struct nfsd3_commitargs),
884 		.pc_ressize = sizeof(struct nfsd3_commitres),
885 		.pc_cachetype = RC_NOCACHE,
886 		.pc_xdrressize = ST+WC+2,
887 	},
888 };
889 
890 struct svc_version	nfsd_version3 = {
891 		.vs_vers	= 3,
892 		.vs_nproc	= 22,
893 		.vs_proc	= nfsd_procedures3,
894 		.vs_dispatch	= nfsd_dispatch,
895 		.vs_xdrsize	= NFS3_SVC_XDRSIZE,
896 };
897