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