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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 | #include <linux/magic.h> |
22 | |
23 | #include <linux/sunrpc/svc.h> |
24 | #include <linux/nfsd/nfsd.h> |
25 | #include <linux/nfsd/cache.h> |
26 | #include <linux/nfsd/xdr3.h> |
27 | #include <linux/nfs3.h> |
28 | |
29 | #define NFSDDBG_FACILITY NFSDDBG_PROC |
30 | |
31 | #define RETURN_STATUS(st) { resp->status = (st); return (st); } |
32 | |
33 | static int nfs3_ftypes[] = { |
34 | 0, /* NF3NON */ |
35 | S_IFREG, /* NF3REG */ |
36 | S_IFDIR, /* NF3DIR */ |
37 | S_IFBLK, /* NF3BLK */ |
38 | S_IFCHR, /* NF3CHR */ |
39 | S_IFLNK, /* NF3LNK */ |
40 | S_IFSOCK, /* NF3SOCK */ |
41 | S_IFIFO, /* NF3FIFO */ |
42 | }; |
43 | |
44 | /* |
45 | * NULL call. |
46 | */ |
47 | static __be32 |
48 | nfsd3_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) |
49 | { |
50 | return nfs_ok; |
51 | } |
52 | |
53 | /* |
54 | * Get a file's attributes |
55 | */ |
56 | static __be32 |
57 | nfsd3_proc_getattr(struct svc_rqst *rqstp, struct nfsd_fhandle *argp, |
58 | struct nfsd3_attrstat *resp) |
59 | { |
60 | int err; |
61 | __be32 nfserr; |
62 | |
63 | dprintk("nfsd: GETATTR(3) %s\n", |
64 | SVCFH_fmt(&argp->fh)); |
65 | |
66 | fh_copy(&resp->fh, &argp->fh); |
67 | nfserr = fh_verify(rqstp, &resp->fh, 0, |
68 | NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT); |
69 | if (nfserr) |
70 | RETURN_STATUS(nfserr); |
71 | |
72 | err = vfs_getattr(resp->fh.fh_export->ex_path.mnt, |
73 | resp->fh.fh_dentry, &resp->stat); |
74 | nfserr = nfserrno(err); |
75 | |
76 | RETURN_STATUS(nfserr); |
77 | } |
78 | |
79 | /* |
80 | * Set a file's attributes |
81 | */ |
82 | static __be32 |
83 | nfsd3_proc_setattr(struct svc_rqst *rqstp, struct nfsd3_sattrargs *argp, |
84 | struct nfsd3_attrstat *resp) |
85 | { |
86 | __be32 nfserr; |
87 | |
88 | dprintk("nfsd: SETATTR(3) %s\n", |
89 | SVCFH_fmt(&argp->fh)); |
90 | |
91 | fh_copy(&resp->fh, &argp->fh); |
92 | nfserr = nfsd_setattr(rqstp, &resp->fh, &argp->attrs, |
93 | argp->check_guard, argp->guardtime); |
94 | RETURN_STATUS(nfserr); |
95 | } |
96 | |
97 | /* |
98 | * Look up a path name component |
99 | */ |
100 | static __be32 |
101 | nfsd3_proc_lookup(struct svc_rqst *rqstp, struct nfsd3_diropargs *argp, |
102 | struct nfsd3_diropres *resp) |
103 | { |
104 | __be32 nfserr; |
105 | |
106 | dprintk("nfsd: LOOKUP(3) %s %.*s\n", |
107 | SVCFH_fmt(&argp->fh), |
108 | argp->len, |
109 | argp->name); |
110 | |
111 | fh_copy(&resp->dirfh, &argp->fh); |
112 | fh_init(&resp->fh, NFS3_FHSIZE); |
113 | |
114 | nfserr = nfsd_lookup(rqstp, &resp->dirfh, |
115 | argp->name, |
116 | argp->len, |
117 | &resp->fh); |
118 | RETURN_STATUS(nfserr); |
119 | } |
120 | |
121 | /* |
122 | * Check file access |
123 | */ |
124 | static __be32 |
125 | nfsd3_proc_access(struct svc_rqst *rqstp, struct nfsd3_accessargs *argp, |
126 | struct nfsd3_accessres *resp) |
127 | { |
128 | __be32 nfserr; |
129 | |
130 | dprintk("nfsd: ACCESS(3) %s 0x%x\n", |
131 | SVCFH_fmt(&argp->fh), |
132 | argp->access); |
133 | |
134 | fh_copy(&resp->fh, &argp->fh); |
135 | resp->access = argp->access; |
136 | nfserr = nfsd_access(rqstp, &resp->fh, &resp->access, NULL); |
137 | RETURN_STATUS(nfserr); |
138 | } |
139 | |
140 | /* |
141 | * Read a symlink. |
142 | */ |
143 | static __be32 |
144 | nfsd3_proc_readlink(struct svc_rqst *rqstp, struct nfsd3_readlinkargs *argp, |
145 | struct nfsd3_readlinkres *resp) |
146 | { |
147 | __be32 nfserr; |
148 | |
149 | dprintk("nfsd: READLINK(3) %s\n", SVCFH_fmt(&argp->fh)); |
150 | |
151 | /* Read the symlink. */ |
152 | fh_copy(&resp->fh, &argp->fh); |
153 | resp->len = NFS3_MAXPATHLEN; |
154 | nfserr = nfsd_readlink(rqstp, &resp->fh, argp->buffer, &resp->len); |
155 | RETURN_STATUS(nfserr); |
156 | } |
157 | |
158 | /* |
159 | * Read a portion of a file. |
160 | */ |
161 | static __be32 |
162 | nfsd3_proc_read(struct svc_rqst *rqstp, struct nfsd3_readargs *argp, |
163 | struct nfsd3_readres *resp) |
164 | { |
165 | __be32 nfserr; |
166 | u32 max_blocksize = svc_max_payload(rqstp); |
167 | |
168 | dprintk("nfsd: READ(3) %s %lu bytes at %lu\n", |
169 | SVCFH_fmt(&argp->fh), |
170 | (unsigned long) argp->count, |
171 | (unsigned long) argp->offset); |
172 | |
173 | /* Obtain buffer pointer for payload. |
174 | * 1 (status) + 22 (post_op_attr) + 1 (count) + 1 (eof) |
175 | * + 1 (xdr opaque byte count) = 26 |
176 | */ |
177 | |
178 | resp->count = argp->count; |
179 | if (max_blocksize < resp->count) |
180 | resp->count = max_blocksize; |
181 | |
182 | svc_reserve_auth(rqstp, ((1 + NFS3_POST_OP_ATTR_WORDS + 3)<<2) + resp->count +4); |
183 | |
184 | fh_copy(&resp->fh, &argp->fh); |
185 | nfserr = nfsd_read(rqstp, &resp->fh, NULL, |
186 | argp->offset, |
187 | rqstp->rq_vec, argp->vlen, |
188 | &resp->count); |
189 | if (nfserr == 0) { |
190 | struct inode *inode = resp->fh.fh_dentry->d_inode; |
191 | |
192 | resp->eof = (argp->offset + resp->count) >= inode->i_size; |
193 | } |
194 | |
195 | RETURN_STATUS(nfserr); |
196 | } |
197 | |
198 | /* |
199 | * Write data to a file |
200 | */ |
201 | static __be32 |
202 | nfsd3_proc_write(struct svc_rqst *rqstp, struct nfsd3_writeargs *argp, |
203 | struct nfsd3_writeres *resp) |
204 | { |
205 | __be32 nfserr; |
206 | unsigned long cnt = argp->len; |
207 | |
208 | dprintk("nfsd: WRITE(3) %s %d bytes at %ld%s\n", |
209 | SVCFH_fmt(&argp->fh), |
210 | argp->len, |
211 | (unsigned long) argp->offset, |
212 | argp->stable? " stable" : ""); |
213 | |
214 | fh_copy(&resp->fh, &argp->fh); |
215 | resp->committed = argp->stable; |
216 | nfserr = nfsd_write(rqstp, &resp->fh, NULL, |
217 | argp->offset, |
218 | rqstp->rq_vec, argp->vlen, |
219 | &cnt, |
220 | &resp->committed); |
221 | resp->count = cnt; |
222 | RETURN_STATUS(nfserr); |
223 | } |
224 | |
225 | /* |
226 | * With NFSv3, CREATE processing is a lot easier than with NFSv2. |
227 | * At least in theory; we'll see how it fares in practice when the |
228 | * first reports about SunOS compatibility problems start to pour in... |
229 | */ |
230 | static __be32 |
231 | nfsd3_proc_create(struct svc_rqst *rqstp, struct nfsd3_createargs *argp, |
232 | struct nfsd3_diropres *resp) |
233 | { |
234 | svc_fh *dirfhp, *newfhp = NULL; |
235 | struct iattr *attr; |
236 | __be32 nfserr; |
237 | |
238 | dprintk("nfsd: CREATE(3) %s %.*s\n", |
239 | SVCFH_fmt(&argp->fh), |
240 | argp->len, |
241 | argp->name); |
242 | |
243 | dirfhp = fh_copy(&resp->dirfh, &argp->fh); |
244 | newfhp = fh_init(&resp->fh, NFS3_FHSIZE); |
245 | attr = &argp->attrs; |
246 | |
247 | /* Get the directory inode */ |
248 | nfserr = fh_verify(rqstp, dirfhp, S_IFDIR, NFSD_MAY_CREATE); |
249 | if (nfserr) |
250 | RETURN_STATUS(nfserr); |
251 | |
252 | /* Unfudge the mode bits */ |
253 | attr->ia_mode &= ~S_IFMT; |
254 | if (!(attr->ia_valid & ATTR_MODE)) { |
255 | attr->ia_valid |= ATTR_MODE; |
256 | attr->ia_mode = S_IFREG; |
257 | } else { |
258 | attr->ia_mode = (attr->ia_mode & ~S_IFMT) | S_IFREG; |
259 | } |
260 | |
261 | /* Now create the file and set attributes */ |
262 | nfserr = nfsd_create_v3(rqstp, dirfhp, argp->name, argp->len, |
263 | attr, newfhp, |
264 | argp->createmode, argp->verf, NULL, NULL); |
265 | |
266 | RETURN_STATUS(nfserr); |
267 | } |
268 | |
269 | /* |
270 | * Make directory. This operation is not idempotent. |
271 | */ |
272 | static __be32 |
273 | nfsd3_proc_mkdir(struct svc_rqst *rqstp, struct nfsd3_createargs *argp, |
274 | struct nfsd3_diropres *resp) |
275 | { |
276 | __be32 nfserr; |
277 | |
278 | dprintk("nfsd: MKDIR(3) %s %.*s\n", |
279 | SVCFH_fmt(&argp->fh), |
280 | argp->len, |
281 | argp->name); |
282 | |
283 | argp->attrs.ia_valid &= ~ATTR_SIZE; |
284 | fh_copy(&resp->dirfh, &argp->fh); |
285 | fh_init(&resp->fh, NFS3_FHSIZE); |
286 | nfserr = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len, |
287 | &argp->attrs, S_IFDIR, 0, &resp->fh); |
288 | |
289 | RETURN_STATUS(nfserr); |
290 | } |
291 | |
292 | static __be32 |
293 | nfsd3_proc_symlink(struct svc_rqst *rqstp, struct nfsd3_symlinkargs *argp, |
294 | struct nfsd3_diropres *resp) |
295 | { |
296 | __be32 nfserr; |
297 | |
298 | dprintk("nfsd: SYMLINK(3) %s %.*s -> %.*s\n", |
299 | SVCFH_fmt(&argp->ffh), |
300 | argp->flen, argp->fname, |
301 | argp->tlen, argp->tname); |
302 | |
303 | fh_copy(&resp->dirfh, &argp->ffh); |
304 | fh_init(&resp->fh, NFS3_FHSIZE); |
305 | nfserr = nfsd_symlink(rqstp, &resp->dirfh, argp->fname, argp->flen, |
306 | argp->tname, argp->tlen, |
307 | &resp->fh, &argp->attrs); |
308 | RETURN_STATUS(nfserr); |
309 | } |
310 | |
311 | /* |
312 | * Make socket/fifo/device. |
313 | */ |
314 | static __be32 |
315 | nfsd3_proc_mknod(struct svc_rqst *rqstp, struct nfsd3_mknodargs *argp, |
316 | struct nfsd3_diropres *resp) |
317 | { |
318 | __be32 nfserr; |
319 | int type; |
320 | dev_t rdev = 0; |
321 | |
322 | dprintk("nfsd: MKNOD(3) %s %.*s\n", |
323 | SVCFH_fmt(&argp->fh), |
324 | argp->len, |
325 | argp->name); |
326 | |
327 | fh_copy(&resp->dirfh, &argp->fh); |
328 | fh_init(&resp->fh, NFS3_FHSIZE); |
329 | |
330 | if (argp->ftype == 0 || argp->ftype >= NF3BAD) |
331 | RETURN_STATUS(nfserr_inval); |
332 | if (argp->ftype == NF3CHR || argp->ftype == NF3BLK) { |
333 | rdev = MKDEV(argp->major, argp->minor); |
334 | if (MAJOR(rdev) != argp->major || |
335 | MINOR(rdev) != argp->minor) |
336 | RETURN_STATUS(nfserr_inval); |
337 | } else |
338 | if (argp->ftype != NF3SOCK && argp->ftype != NF3FIFO) |
339 | RETURN_STATUS(nfserr_inval); |
340 | |
341 | type = nfs3_ftypes[argp->ftype]; |
342 | nfserr = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len, |
343 | &argp->attrs, type, rdev, &resp->fh); |
344 | |
345 | RETURN_STATUS(nfserr); |
346 | } |
347 | |
348 | /* |
349 | * Remove file/fifo/socket etc. |
350 | */ |
351 | static __be32 |
352 | nfsd3_proc_remove(struct svc_rqst *rqstp, struct nfsd3_diropargs *argp, |
353 | struct nfsd3_attrstat *resp) |
354 | { |
355 | __be32 nfserr; |
356 | |
357 | dprintk("nfsd: REMOVE(3) %s %.*s\n", |
358 | SVCFH_fmt(&argp->fh), |
359 | argp->len, |
360 | argp->name); |
361 | |
362 | /* Unlink. -S_IFDIR means file must not be a directory */ |
363 | fh_copy(&resp->fh, &argp->fh); |
364 | nfserr = nfsd_unlink(rqstp, &resp->fh, -S_IFDIR, argp->name, argp->len); |
365 | RETURN_STATUS(nfserr); |
366 | } |
367 | |
368 | /* |
369 | * Remove a directory |
370 | */ |
371 | static __be32 |
372 | nfsd3_proc_rmdir(struct svc_rqst *rqstp, struct nfsd3_diropargs *argp, |
373 | struct nfsd3_attrstat *resp) |
374 | { |
375 | __be32 nfserr; |
376 | |
377 | dprintk("nfsd: RMDIR(3) %s %.*s\n", |
378 | SVCFH_fmt(&argp->fh), |
379 | argp->len, |
380 | argp->name); |
381 | |
382 | fh_copy(&resp->fh, &argp->fh); |
383 | nfserr = nfsd_unlink(rqstp, &resp->fh, S_IFDIR, argp->name, argp->len); |
384 | RETURN_STATUS(nfserr); |
385 | } |
386 | |
387 | static __be32 |
388 | nfsd3_proc_rename(struct svc_rqst *rqstp, struct nfsd3_renameargs *argp, |
389 | struct nfsd3_renameres *resp) |
390 | { |
391 | __be32 nfserr; |
392 | |
393 | dprintk("nfsd: RENAME(3) %s %.*s ->\n", |
394 | SVCFH_fmt(&argp->ffh), |
395 | argp->flen, |
396 | argp->fname); |
397 | dprintk("nfsd: -> %s %.*s\n", |
398 | SVCFH_fmt(&argp->tfh), |
399 | argp->tlen, |
400 | argp->tname); |
401 | |
402 | fh_copy(&resp->ffh, &argp->ffh); |
403 | fh_copy(&resp->tfh, &argp->tfh); |
404 | nfserr = nfsd_rename(rqstp, &resp->ffh, argp->fname, argp->flen, |
405 | &resp->tfh, argp->tname, argp->tlen); |
406 | RETURN_STATUS(nfserr); |
407 | } |
408 | |
409 | static __be32 |
410 | nfsd3_proc_link(struct svc_rqst *rqstp, struct nfsd3_linkargs *argp, |
411 | struct nfsd3_linkres *resp) |
412 | { |
413 | __be32 nfserr; |
414 | |
415 | dprintk("nfsd: LINK(3) %s ->\n", |
416 | SVCFH_fmt(&argp->ffh)); |
417 | dprintk("nfsd: -> %s %.*s\n", |
418 | SVCFH_fmt(&argp->tfh), |
419 | argp->tlen, |
420 | argp->tname); |
421 | |
422 | fh_copy(&resp->fh, &argp->ffh); |
423 | fh_copy(&resp->tfh, &argp->tfh); |
424 | nfserr = nfsd_link(rqstp, &resp->tfh, argp->tname, argp->tlen, |
425 | &resp->fh); |
426 | RETURN_STATUS(nfserr); |
427 | } |
428 | |
429 | /* |
430 | * Read a portion of a directory. |
431 | */ |
432 | static __be32 |
433 | nfsd3_proc_readdir(struct svc_rqst *rqstp, struct nfsd3_readdirargs *argp, |
434 | struct nfsd3_readdirres *resp) |
435 | { |
436 | __be32 nfserr; |
437 | int count; |
438 | |
439 | dprintk("nfsd: READDIR(3) %s %d bytes at %d\n", |
440 | SVCFH_fmt(&argp->fh), |
441 | argp->count, (u32) argp->cookie); |
442 | |
443 | /* Make sure we've room for the NULL ptr & eof flag, and shrink to |
444 | * client read size */ |
445 | count = (argp->count >> 2) - 2; |
446 | |
447 | /* Read directory and encode entries on the fly */ |
448 | fh_copy(&resp->fh, &argp->fh); |
449 | |
450 | resp->buflen = count; |
451 | resp->common.err = nfs_ok; |
452 | resp->buffer = argp->buffer; |
453 | resp->rqstp = rqstp; |
454 | nfserr = nfsd_readdir(rqstp, &resp->fh, (loff_t*) &argp->cookie, |
455 | &resp->common, nfs3svc_encode_entry); |
456 | memcpy(resp->verf, argp->verf, 8); |
457 | resp->count = resp->buffer - argp->buffer; |
458 | if (resp->offset) |
459 | xdr_encode_hyper(resp->offset, argp->cookie); |
460 | |
461 | RETURN_STATUS(nfserr); |
462 | } |
463 | |
464 | /* |
465 | * Read a portion of a directory, including file handles and attrs. |
466 | * For now, we choose to ignore the dircount parameter. |
467 | */ |
468 | static __be32 |
469 | nfsd3_proc_readdirplus(struct svc_rqst *rqstp, struct nfsd3_readdirargs *argp, |
470 | struct nfsd3_readdirres *resp) |
471 | { |
472 | __be32 nfserr; |
473 | int count = 0; |
474 | loff_t offset; |
475 | int i; |
476 | caddr_t page_addr = NULL; |
477 | |
478 | dprintk("nfsd: READDIR+(3) %s %d bytes at %d\n", |
479 | SVCFH_fmt(&argp->fh), |
480 | argp->count, (u32) argp->cookie); |
481 | |
482 | /* Convert byte count to number of words (i.e. >> 2), |
483 | * and reserve room for the NULL ptr & eof flag (-2 words) */ |
484 | resp->count = (argp->count >> 2) - 2; |
485 | |
486 | /* Read directory and encode entries on the fly */ |
487 | fh_copy(&resp->fh, &argp->fh); |
488 | |
489 | resp->common.err = nfs_ok; |
490 | resp->buffer = argp->buffer; |
491 | resp->buflen = resp->count; |
492 | resp->rqstp = rqstp; |
493 | offset = argp->cookie; |
494 | nfserr = nfsd_readdir(rqstp, &resp->fh, |
495 | &offset, |
496 | &resp->common, |
497 | nfs3svc_encode_entry_plus); |
498 | memcpy(resp->verf, argp->verf, 8); |
499 | for (i=1; i<rqstp->rq_resused ; i++) { |
500 | page_addr = page_address(rqstp->rq_respages[i]); |
501 | |
502 | if (((caddr_t)resp->buffer >= page_addr) && |
503 | ((caddr_t)resp->buffer < page_addr + PAGE_SIZE)) { |
504 | count += (caddr_t)resp->buffer - page_addr; |
505 | break; |
506 | } |
507 | count += PAGE_SIZE; |
508 | } |
509 | resp->count = count >> 2; |
510 | if (resp->offset) { |
511 | if (unlikely(resp->offset1)) { |
512 | /* we ended up with offset on a page boundary */ |
513 | *resp->offset = htonl(offset >> 32); |
514 | *resp->offset1 = htonl(offset & 0xffffffff); |
515 | resp->offset1 = NULL; |
516 | } else { |
517 | xdr_encode_hyper(resp->offset, offset); |
518 | } |
519 | } |
520 | |
521 | RETURN_STATUS(nfserr); |
522 | } |
523 | |
524 | /* |
525 | * Get file system stats |
526 | */ |
527 | static __be32 |
528 | nfsd3_proc_fsstat(struct svc_rqst * rqstp, struct nfsd_fhandle *argp, |
529 | struct nfsd3_fsstatres *resp) |
530 | { |
531 | __be32 nfserr; |
532 | |
533 | dprintk("nfsd: FSSTAT(3) %s\n", |
534 | SVCFH_fmt(&argp->fh)); |
535 | |
536 | nfserr = nfsd_statfs(rqstp, &argp->fh, &resp->stats, 0); |
537 | fh_put(&argp->fh); |
538 | RETURN_STATUS(nfserr); |
539 | } |
540 | |
541 | /* |
542 | * Get file system info |
543 | */ |
544 | static __be32 |
545 | nfsd3_proc_fsinfo(struct svc_rqst * rqstp, struct nfsd_fhandle *argp, |
546 | struct nfsd3_fsinfores *resp) |
547 | { |
548 | __be32 nfserr; |
549 | u32 max_blocksize = svc_max_payload(rqstp); |
550 | |
551 | dprintk("nfsd: FSINFO(3) %s\n", |
552 | SVCFH_fmt(&argp->fh)); |
553 | |
554 | resp->f_rtmax = max_blocksize; |
555 | resp->f_rtpref = max_blocksize; |
556 | resp->f_rtmult = PAGE_SIZE; |
557 | resp->f_wtmax = max_blocksize; |
558 | resp->f_wtpref = max_blocksize; |
559 | resp->f_wtmult = PAGE_SIZE; |
560 | resp->f_dtpref = PAGE_SIZE; |
561 | resp->f_maxfilesize = ~(u32) 0; |
562 | resp->f_properties = NFS3_FSF_DEFAULT; |
563 | |
564 | nfserr = fh_verify(rqstp, &argp->fh, 0, |
565 | NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT); |
566 | |
567 | /* Check special features of the file system. May request |
568 | * different read/write sizes for file systems known to have |
569 | * problems with large blocks */ |
570 | if (nfserr == 0) { |
571 | struct super_block *sb = argp->fh.fh_dentry->d_inode->i_sb; |
572 | |
573 | /* Note that we don't care for remote fs's here */ |
574 | if (sb->s_magic == MSDOS_SUPER_MAGIC) { |
575 | resp->f_properties = NFS3_FSF_BILLYBOY; |
576 | } |
577 | resp->f_maxfilesize = sb->s_maxbytes; |
578 | } |
579 | |
580 | fh_put(&argp->fh); |
581 | RETURN_STATUS(nfserr); |
582 | } |
583 | |
584 | /* |
585 | * Get pathconf info for the specified file |
586 | */ |
587 | static __be32 |
588 | nfsd3_proc_pathconf(struct svc_rqst * rqstp, struct nfsd_fhandle *argp, |
589 | struct nfsd3_pathconfres *resp) |
590 | { |
591 | __be32 nfserr; |
592 | |
593 | dprintk("nfsd: PATHCONF(3) %s\n", |
594 | SVCFH_fmt(&argp->fh)); |
595 | |
596 | /* Set default pathconf */ |
597 | resp->p_link_max = 255; /* at least */ |
598 | resp->p_name_max = 255; /* at least */ |
599 | resp->p_no_trunc = 0; |
600 | resp->p_chown_restricted = 1; |
601 | resp->p_case_insensitive = 0; |
602 | resp->p_case_preserving = 1; |
603 | |
604 | nfserr = fh_verify(rqstp, &argp->fh, 0, NFSD_MAY_NOP); |
605 | |
606 | if (nfserr == 0) { |
607 | struct super_block *sb = argp->fh.fh_dentry->d_inode->i_sb; |
608 | |
609 | /* Note that we don't care for remote fs's here */ |
610 | switch (sb->s_magic) { |
611 | case EXT2_SUPER_MAGIC: |
612 | resp->p_link_max = EXT2_LINK_MAX; |
613 | resp->p_name_max = EXT2_NAME_LEN; |
614 | break; |
615 | case MSDOS_SUPER_MAGIC: |
616 | resp->p_case_insensitive = 1; |
617 | resp->p_case_preserving = 0; |
618 | break; |
619 | } |
620 | } |
621 | |
622 | fh_put(&argp->fh); |
623 | RETURN_STATUS(nfserr); |
624 | } |
625 | |
626 | |
627 | /* |
628 | * Commit a file (range) to stable storage. |
629 | */ |
630 | static __be32 |
631 | nfsd3_proc_commit(struct svc_rqst * rqstp, struct nfsd3_commitargs *argp, |
632 | struct nfsd3_commitres *resp) |
633 | { |
634 | __be32 nfserr; |
635 | |
636 | dprintk("nfsd: COMMIT(3) %s %u@%Lu\n", |
637 | SVCFH_fmt(&argp->fh), |
638 | argp->count, |
639 | (unsigned long long) argp->offset); |
640 | |
641 | if (argp->offset > NFS_OFFSET_MAX) |
642 | RETURN_STATUS(nfserr_inval); |
643 | |
644 | fh_copy(&resp->fh, &argp->fh); |
645 | nfserr = nfsd_commit(rqstp, &resp->fh, argp->offset, argp->count); |
646 | |
647 | RETURN_STATUS(nfserr); |
648 | } |
649 | |
650 | |
651 | /* |
652 | * NFSv3 Server procedures. |
653 | * Only the results of non-idempotent operations are cached. |
654 | */ |
655 | #define nfs3svc_decode_fhandleargs nfs3svc_decode_fhandle |
656 | #define nfs3svc_encode_attrstatres nfs3svc_encode_attrstat |
657 | #define nfs3svc_encode_wccstatres nfs3svc_encode_wccstat |
658 | #define nfsd3_mkdirargs nfsd3_createargs |
659 | #define nfsd3_readdirplusargs nfsd3_readdirargs |
660 | #define nfsd3_fhandleargs nfsd_fhandle |
661 | #define nfsd3_fhandleres nfsd3_attrstat |
662 | #define nfsd3_attrstatres nfsd3_attrstat |
663 | #define nfsd3_wccstatres nfsd3_attrstat |
664 | #define nfsd3_createres nfsd3_diropres |
665 | #define nfsd3_voidres nfsd3_voidargs |
666 | struct nfsd3_voidargs { int dummy; }; |
667 | |
668 | #define PROC(name, argt, rest, relt, cache, respsize) \ |
669 | { (svc_procfunc) nfsd3_proc_##name, \ |
670 | (kxdrproc_t) nfs3svc_decode_##argt##args, \ |
671 | (kxdrproc_t) nfs3svc_encode_##rest##res, \ |
672 | (kxdrproc_t) nfs3svc_release_##relt, \ |
673 | sizeof(struct nfsd3_##argt##args), \ |
674 | sizeof(struct nfsd3_##rest##res), \ |
675 | 0, \ |
676 | cache, \ |
677 | respsize, \ |
678 | } |
679 | |
680 | #define ST 1 /* status*/ |
681 | #define FH 17 /* filehandle with length */ |
682 | #define AT 21 /* attributes */ |
683 | #define pAT (1+AT) /* post attributes - conditional */ |
684 | #define WC (7+pAT) /* WCC attributes */ |
685 | |
686 | static struct svc_procedure nfsd_procedures3[22] = { |
687 | [NFS3PROC_NULL] = { |
688 | .pc_func = (svc_procfunc) nfsd3_proc_null, |
689 | .pc_encode = (kxdrproc_t) nfs3svc_encode_voidres, |
690 | .pc_argsize = sizeof(struct nfsd3_voidargs), |
691 | .pc_ressize = sizeof(struct nfsd3_voidres), |
692 | .pc_cachetype = RC_NOCACHE, |
693 | .pc_xdrressize = ST, |
694 | }, |
695 | [NFS3PROC_GETATTR] = { |
696 | .pc_func = (svc_procfunc) nfsd3_proc_getattr, |
697 | .pc_decode = (kxdrproc_t) nfs3svc_decode_fhandleargs, |
698 | .pc_encode = (kxdrproc_t) nfs3svc_encode_attrstatres, |
699 | .pc_release = (kxdrproc_t) nfs3svc_release_fhandle, |
700 | .pc_argsize = sizeof(struct nfsd3_fhandleargs), |
701 | .pc_ressize = sizeof(struct nfsd3_attrstatres), |
702 | .pc_cachetype = RC_NOCACHE, |
703 | .pc_xdrressize = ST+AT, |
704 | }, |
705 | [NFS3PROC_SETATTR] = { |
706 | .pc_func = (svc_procfunc) nfsd3_proc_setattr, |
707 | .pc_decode = (kxdrproc_t) nfs3svc_decode_sattrargs, |
708 | .pc_encode = (kxdrproc_t) nfs3svc_encode_wccstatres, |
709 | .pc_release = (kxdrproc_t) nfs3svc_release_fhandle, |
710 | .pc_argsize = sizeof(struct nfsd3_sattrargs), |
711 | .pc_ressize = sizeof(struct nfsd3_wccstatres), |
712 | .pc_cachetype = RC_REPLBUFF, |
713 | .pc_xdrressize = ST+WC, |
714 | }, |
715 | [NFS3PROC_LOOKUP] = { |
716 | .pc_func = (svc_procfunc) nfsd3_proc_lookup, |
717 | .pc_decode = (kxdrproc_t) nfs3svc_decode_diropargs, |
718 | .pc_encode = (kxdrproc_t) nfs3svc_encode_diropres, |
719 | .pc_release = (kxdrproc_t) nfs3svc_release_fhandle2, |
720 | .pc_argsize = sizeof(struct nfsd3_diropargs), |
721 | .pc_ressize = sizeof(struct nfsd3_diropres), |
722 | .pc_cachetype = RC_NOCACHE, |
723 | .pc_xdrressize = ST+FH+pAT+pAT, |
724 | }, |
725 | [NFS3PROC_ACCESS] = { |
726 | .pc_func = (svc_procfunc) nfsd3_proc_access, |
727 | .pc_decode = (kxdrproc_t) nfs3svc_decode_accessargs, |
728 | .pc_encode = (kxdrproc_t) nfs3svc_encode_accessres, |
729 | .pc_release = (kxdrproc_t) nfs3svc_release_fhandle, |
730 | .pc_argsize = sizeof(struct nfsd3_accessargs), |
731 | .pc_ressize = sizeof(struct nfsd3_accessres), |
732 | .pc_cachetype = RC_NOCACHE, |
733 | .pc_xdrressize = ST+pAT+1, |
734 | }, |
735 | [NFS3PROC_READLINK] = { |
736 | .pc_func = (svc_procfunc) nfsd3_proc_readlink, |
737 | .pc_decode = (kxdrproc_t) nfs3svc_decode_readlinkargs, |
738 | .pc_encode = (kxdrproc_t) nfs3svc_encode_readlinkres, |
739 | .pc_release = (kxdrproc_t) nfs3svc_release_fhandle, |
740 | .pc_argsize = sizeof(struct nfsd3_readlinkargs), |
741 | .pc_ressize = sizeof(struct nfsd3_readlinkres), |
742 | .pc_cachetype = RC_NOCACHE, |
743 | .pc_xdrressize = ST+pAT+1+NFS3_MAXPATHLEN/4, |
744 | }, |
745 | [NFS3PROC_READ] = { |
746 | .pc_func = (svc_procfunc) nfsd3_proc_read, |
747 | .pc_decode = (kxdrproc_t) nfs3svc_decode_readargs, |
748 | .pc_encode = (kxdrproc_t) nfs3svc_encode_readres, |
749 | .pc_release = (kxdrproc_t) nfs3svc_release_fhandle, |
750 | .pc_argsize = sizeof(struct nfsd3_readargs), |
751 | .pc_ressize = sizeof(struct nfsd3_readres), |
752 | .pc_cachetype = RC_NOCACHE, |
753 | .pc_xdrressize = ST+pAT+4+NFSSVC_MAXBLKSIZE/4, |
754 | }, |
755 | [NFS3PROC_WRITE] = { |
756 | .pc_func = (svc_procfunc) nfsd3_proc_write, |
757 | .pc_decode = (kxdrproc_t) nfs3svc_decode_writeargs, |
758 | .pc_encode = (kxdrproc_t) nfs3svc_encode_writeres, |
759 | .pc_release = (kxdrproc_t) nfs3svc_release_fhandle, |
760 | .pc_argsize = sizeof(struct nfsd3_writeargs), |
761 | .pc_ressize = sizeof(struct nfsd3_writeres), |
762 | .pc_cachetype = RC_REPLBUFF, |
763 | .pc_xdrressize = ST+WC+4, |
764 | }, |
765 | [NFS3PROC_CREATE] = { |
766 | .pc_func = (svc_procfunc) nfsd3_proc_create, |
767 | .pc_decode = (kxdrproc_t) nfs3svc_decode_createargs, |
768 | .pc_encode = (kxdrproc_t) nfs3svc_encode_createres, |
769 | .pc_release = (kxdrproc_t) nfs3svc_release_fhandle2, |
770 | .pc_argsize = sizeof(struct nfsd3_createargs), |
771 | .pc_ressize = sizeof(struct nfsd3_createres), |
772 | .pc_cachetype = RC_REPLBUFF, |
773 | .pc_xdrressize = ST+(1+FH+pAT)+WC, |
774 | }, |
775 | [NFS3PROC_MKDIR] = { |
776 | .pc_func = (svc_procfunc) nfsd3_proc_mkdir, |
777 | .pc_decode = (kxdrproc_t) nfs3svc_decode_mkdirargs, |
778 | .pc_encode = (kxdrproc_t) nfs3svc_encode_createres, |
779 | .pc_release = (kxdrproc_t) nfs3svc_release_fhandle2, |
780 | .pc_argsize = sizeof(struct nfsd3_mkdirargs), |
781 | .pc_ressize = sizeof(struct nfsd3_createres), |
782 | .pc_cachetype = RC_REPLBUFF, |
783 | .pc_xdrressize = ST+(1+FH+pAT)+WC, |
784 | }, |
785 | [NFS3PROC_SYMLINK] = { |
786 | .pc_func = (svc_procfunc) nfsd3_proc_symlink, |
787 | .pc_decode = (kxdrproc_t) nfs3svc_decode_symlinkargs, |
788 | .pc_encode = (kxdrproc_t) nfs3svc_encode_createres, |
789 | .pc_release = (kxdrproc_t) nfs3svc_release_fhandle2, |
790 | .pc_argsize = sizeof(struct nfsd3_symlinkargs), |
791 | .pc_ressize = sizeof(struct nfsd3_createres), |
792 | .pc_cachetype = RC_REPLBUFF, |
793 | .pc_xdrressize = ST+(1+FH+pAT)+WC, |
794 | }, |
795 | [NFS3PROC_MKNOD] = { |
796 | .pc_func = (svc_procfunc) nfsd3_proc_mknod, |
797 | .pc_decode = (kxdrproc_t) nfs3svc_decode_mknodargs, |
798 | .pc_encode = (kxdrproc_t) nfs3svc_encode_createres, |
799 | .pc_release = (kxdrproc_t) nfs3svc_release_fhandle2, |
800 | .pc_argsize = sizeof(struct nfsd3_mknodargs), |
801 | .pc_ressize = sizeof(struct nfsd3_createres), |
802 | .pc_cachetype = RC_REPLBUFF, |
803 | .pc_xdrressize = ST+(1+FH+pAT)+WC, |
804 | }, |
805 | [NFS3PROC_REMOVE] = { |
806 | .pc_func = (svc_procfunc) nfsd3_proc_remove, |
807 | .pc_decode = (kxdrproc_t) nfs3svc_decode_diropargs, |
808 | .pc_encode = (kxdrproc_t) nfs3svc_encode_wccstatres, |
809 | .pc_release = (kxdrproc_t) nfs3svc_release_fhandle, |
810 | .pc_argsize = sizeof(struct nfsd3_diropargs), |
811 | .pc_ressize = sizeof(struct nfsd3_wccstatres), |
812 | .pc_cachetype = RC_REPLBUFF, |
813 | .pc_xdrressize = ST+WC, |
814 | }, |
815 | [NFS3PROC_RMDIR] = { |
816 | .pc_func = (svc_procfunc) nfsd3_proc_rmdir, |
817 | .pc_decode = (kxdrproc_t) nfs3svc_decode_diropargs, |
818 | .pc_encode = (kxdrproc_t) nfs3svc_encode_wccstatres, |
819 | .pc_release = (kxdrproc_t) nfs3svc_release_fhandle, |
820 | .pc_argsize = sizeof(struct nfsd3_diropargs), |
821 | .pc_ressize = sizeof(struct nfsd3_wccstatres), |
822 | .pc_cachetype = RC_REPLBUFF, |
823 | .pc_xdrressize = ST+WC, |
824 | }, |
825 | [NFS3PROC_RENAME] = { |
826 | .pc_func = (svc_procfunc) nfsd3_proc_rename, |
827 | .pc_decode = (kxdrproc_t) nfs3svc_decode_renameargs, |
828 | .pc_encode = (kxdrproc_t) nfs3svc_encode_renameres, |
829 | .pc_release = (kxdrproc_t) nfs3svc_release_fhandle2, |
830 | .pc_argsize = sizeof(struct nfsd3_renameargs), |
831 | .pc_ressize = sizeof(struct nfsd3_renameres), |
832 | .pc_cachetype = RC_REPLBUFF, |
833 | .pc_xdrressize = ST+WC+WC, |
834 | }, |
835 | [NFS3PROC_LINK] = { |
836 | .pc_func = (svc_procfunc) nfsd3_proc_link, |
837 | .pc_decode = (kxdrproc_t) nfs3svc_decode_linkargs, |
838 | .pc_encode = (kxdrproc_t) nfs3svc_encode_linkres, |
839 | .pc_release = (kxdrproc_t) nfs3svc_release_fhandle2, |
840 | .pc_argsize = sizeof(struct nfsd3_linkargs), |
841 | .pc_ressize = sizeof(struct nfsd3_linkres), |
842 | .pc_cachetype = RC_REPLBUFF, |
843 | .pc_xdrressize = ST+pAT+WC, |
844 | }, |
845 | [NFS3PROC_READDIR] = { |
846 | .pc_func = (svc_procfunc) nfsd3_proc_readdir, |
847 | .pc_decode = (kxdrproc_t) nfs3svc_decode_readdirargs, |
848 | .pc_encode = (kxdrproc_t) nfs3svc_encode_readdirres, |
849 | .pc_release = (kxdrproc_t) nfs3svc_release_fhandle, |
850 | .pc_argsize = sizeof(struct nfsd3_readdirargs), |
851 | .pc_ressize = sizeof(struct nfsd3_readdirres), |
852 | .pc_cachetype = RC_NOCACHE, |
853 | }, |
854 | [NFS3PROC_READDIRPLUS] = { |
855 | .pc_func = (svc_procfunc) nfsd3_proc_readdirplus, |
856 | .pc_decode = (kxdrproc_t) nfs3svc_decode_readdirplusargs, |
857 | .pc_encode = (kxdrproc_t) nfs3svc_encode_readdirres, |
858 | .pc_release = (kxdrproc_t) nfs3svc_release_fhandle, |
859 | .pc_argsize = sizeof(struct nfsd3_readdirplusargs), |
860 | .pc_ressize = sizeof(struct nfsd3_readdirres), |
861 | .pc_cachetype = RC_NOCACHE, |
862 | }, |
863 | [NFS3PROC_FSSTAT] = { |
864 | .pc_func = (svc_procfunc) nfsd3_proc_fsstat, |
865 | .pc_decode = (kxdrproc_t) nfs3svc_decode_fhandleargs, |
866 | .pc_encode = (kxdrproc_t) nfs3svc_encode_fsstatres, |
867 | .pc_argsize = sizeof(struct nfsd3_fhandleargs), |
868 | .pc_ressize = sizeof(struct nfsd3_fsstatres), |
869 | .pc_cachetype = RC_NOCACHE, |
870 | .pc_xdrressize = ST+pAT+2*6+1, |
871 | }, |
872 | [NFS3PROC_FSINFO] = { |
873 | .pc_func = (svc_procfunc) nfsd3_proc_fsinfo, |
874 | .pc_decode = (kxdrproc_t) nfs3svc_decode_fhandleargs, |
875 | .pc_encode = (kxdrproc_t) nfs3svc_encode_fsinfores, |
876 | .pc_argsize = sizeof(struct nfsd3_fhandleargs), |
877 | .pc_ressize = sizeof(struct nfsd3_fsinfores), |
878 | .pc_cachetype = RC_NOCACHE, |
879 | .pc_xdrressize = ST+pAT+12, |
880 | }, |
881 | [NFS3PROC_PATHCONF] = { |
882 | .pc_func = (svc_procfunc) nfsd3_proc_pathconf, |
883 | .pc_decode = (kxdrproc_t) nfs3svc_decode_fhandleargs, |
884 | .pc_encode = (kxdrproc_t) nfs3svc_encode_pathconfres, |
885 | .pc_argsize = sizeof(struct nfsd3_fhandleargs), |
886 | .pc_ressize = sizeof(struct nfsd3_pathconfres), |
887 | .pc_cachetype = RC_NOCACHE, |
888 | .pc_xdrressize = ST+pAT+6, |
889 | }, |
890 | [NFS3PROC_COMMIT] = { |
891 | .pc_func = (svc_procfunc) nfsd3_proc_commit, |
892 | .pc_decode = (kxdrproc_t) nfs3svc_decode_commitargs, |
893 | .pc_encode = (kxdrproc_t) nfs3svc_encode_commitres, |
894 | .pc_release = (kxdrproc_t) nfs3svc_release_fhandle, |
895 | .pc_argsize = sizeof(struct nfsd3_commitargs), |
896 | .pc_ressize = sizeof(struct nfsd3_commitres), |
897 | .pc_cachetype = RC_NOCACHE, |
898 | .pc_xdrressize = ST+WC+2, |
899 | }, |
900 | }; |
901 | |
902 | struct svc_version nfsd_version3 = { |
903 | .vs_vers = 3, |
904 | .vs_nproc = 22, |
905 | .vs_proc = nfsd_procedures3, |
906 | .vs_dispatch = nfsd_dispatch, |
907 | .vs_xdrsize = NFS3_SVC_XDRSIZE, |
908 | }; |
909 |
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