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gpio: rcar: Fix runtime PM imbalance on error
[linux/fpc-iii.git] / fs / nfsd / nfs3proc.c
blob288bc76b4574de1eb22b3754572a2d18cb756f0d
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Process version 3 NFS requests.
4 *
5 * Copyright (C) 1996, 1997, 1998 Olaf Kirch <okir@monad.swb.de>
6 */
7
8 #include <linux/fs.h>
9 #include <linux/ext2_fs.h>
10 #include <linux/magic.h>
11
12 #include "cache.h"
13 #include "xdr3.h"
14 #include "vfs.h"
15
16 #define NFSDDBG_FACILITY NFSDDBG_PROC
17
18 #define RETURN_STATUS(st) { resp->status = (st); return (st); }
19
20 static int nfs3_ftypes[] = {
21 0, /* NF3NON */
22 S_IFREG, /* NF3REG */
23 S_IFDIR, /* NF3DIR */
24 S_IFBLK, /* NF3BLK */
25 S_IFCHR, /* NF3CHR */
26 S_IFLNK, /* NF3LNK */
27 S_IFSOCK, /* NF3SOCK */
28 S_IFIFO, /* NF3FIFO */
29 };
30
31 /*
32 * NULL call.
33 */
34 static __be32
35 nfsd3_proc_null(struct svc_rqst *rqstp)
36 {
37 return nfs_ok;
38 }
39
40 /*
41 * Get a file's attributes
42 */
43 static __be32
44 nfsd3_proc_getattr(struct svc_rqst *rqstp)
45 {
46 struct nfsd_fhandle *argp = rqstp->rq_argp;
47 struct nfsd3_attrstat *resp = rqstp->rq_resp;
48 __be32 nfserr;
49
50 dprintk("nfsd: GETATTR(3) %s\n",
51 SVCFH_fmt(&argp->fh));
52
53 fh_copy(&resp->fh, &argp->fh);
54 nfserr = fh_verify(rqstp, &resp->fh, 0,
55 NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT);
56 if (nfserr)
57 RETURN_STATUS(nfserr);
58
59 nfserr = fh_getattr(&resp->fh, &resp->stat);
60
61 RETURN_STATUS(nfserr);
62 }
63
64 /*
65 * Set a file's attributes
66 */
67 static __be32
68 nfsd3_proc_setattr(struct svc_rqst *rqstp)
69 {
70 struct nfsd3_sattrargs *argp = rqstp->rq_argp;
71 struct nfsd3_attrstat *resp = rqstp->rq_resp;
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
87 nfsd3_proc_lookup(struct svc_rqst *rqstp)
88 {
89 struct nfsd3_diropargs *argp = rqstp->rq_argp;
90 struct nfsd3_diropres *resp = rqstp->rq_resp;
91 __be32 nfserr;
92
93 dprintk("nfsd: LOOKUP(3) %s %.*s\n",
94 SVCFH_fmt(&argp->fh),
95 argp->len,
96 argp->name);
97
98 fh_copy(&resp->dirfh, &argp->fh);
99 fh_init(&resp->fh, NFS3_FHSIZE);
100
101 nfserr = nfsd_lookup(rqstp, &resp->dirfh,
102 argp->name,
103 argp->len,
104 &resp->fh);
105 RETURN_STATUS(nfserr);
106 }
107
108 /*
109 * Check file access
110 */
111 static __be32
112 nfsd3_proc_access(struct svc_rqst *rqstp)
113 {
114 struct nfsd3_accessargs *argp = rqstp->rq_argp;
115 struct nfsd3_accessres *resp = rqstp->rq_resp;
116 __be32 nfserr;
117
118 dprintk("nfsd: ACCESS(3) %s 0x%x\n",
119 SVCFH_fmt(&argp->fh),
120 argp->access);
121
122 fh_copy(&resp->fh, &argp->fh);
123 resp->access = argp->access;
124 nfserr = nfsd_access(rqstp, &resp->fh, &resp->access, NULL);
125 RETURN_STATUS(nfserr);
126 }
127
128 /*
129 * Read a symlink.
130 */
131 static __be32
132 nfsd3_proc_readlink(struct svc_rqst *rqstp)
133 {
134 struct nfsd3_readlinkargs *argp = rqstp->rq_argp;
135 struct nfsd3_readlinkres *resp = rqstp->rq_resp;
136 __be32 nfserr;
137
138 dprintk("nfsd: READLINK(3) %s\n", SVCFH_fmt(&argp->fh));
139
140 /* Read the symlink. */
141 fh_copy(&resp->fh, &argp->fh);
142 resp->len = NFS3_MAXPATHLEN;
143 nfserr = nfsd_readlink(rqstp, &resp->fh, argp->buffer, &resp->len);
144 RETURN_STATUS(nfserr);
145 }
146
147 /*
148 * Read a portion of a file.
149 */
150 static __be32
151 nfsd3_proc_read(struct svc_rqst *rqstp)
152 {
153 struct nfsd3_readargs *argp = rqstp->rq_argp;
154 struct nfsd3_readres *resp = rqstp->rq_resp;
155 __be32 nfserr;
156 u32 max_blocksize = svc_max_payload(rqstp);
157 unsigned long cnt = min(argp->count, max_blocksize);
158
159 dprintk("nfsd: READ(3) %s %lu bytes at %Lu\n",
160 SVCFH_fmt(&argp->fh),
161 (unsigned long) argp->count,
162 (unsigned long long) argp->offset);
163
164 /* Obtain buffer pointer for payload.
165 * 1 (status) + 22 (post_op_attr) + 1 (count) + 1 (eof)
166 * + 1 (xdr opaque byte count) = 26
167 */
168 resp->count = cnt;
169 svc_reserve_auth(rqstp, ((1 + NFS3_POST_OP_ATTR_WORDS + 3)<<2) + resp->count +4);
170
171 fh_copy(&resp->fh, &argp->fh);
172 nfserr = nfsd_read(rqstp, &resp->fh,
173 argp->offset,
174 rqstp->rq_vec, argp->vlen,
175 &resp->count,
176 &resp->eof);
177 RETURN_STATUS(nfserr);
178 }
179
180 /*
181 * Write data to a file
182 */
183 static __be32
184 nfsd3_proc_write(struct svc_rqst *rqstp)
185 {
186 struct nfsd3_writeargs *argp = rqstp->rq_argp;
187 struct nfsd3_writeres *resp = rqstp->rq_resp;
188 __be32 nfserr;
189 unsigned long cnt = argp->len;
190 unsigned int nvecs;
191
192 dprintk("nfsd: WRITE(3) %s %d bytes at %Lu%s\n",
193 SVCFH_fmt(&argp->fh),
194 argp->len,
195 (unsigned long long) argp->offset,
196 argp->stable? " stable" : "");
197
198 fh_copy(&resp->fh, &argp->fh);
199 resp->committed = argp->stable;
200 nvecs = svc_fill_write_vector(rqstp, rqstp->rq_arg.pages,
201 &argp->first, cnt);
202 if (!nvecs)
203 RETURN_STATUS(nfserr_io);
204 nfserr = nfsd_write(rqstp, &resp->fh, argp->offset,
205 rqstp->rq_vec, nvecs, &cnt,
206 resp->committed, resp->verf);
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
217 nfsd3_proc_create(struct svc_rqst *rqstp)
218 {
219 struct nfsd3_createargs *argp = rqstp->rq_argp;
220 struct nfsd3_diropres *resp = rqstp->rq_resp;
221 svc_fh *dirfhp, *newfhp = NULL;
222 struct iattr *attr;
223 __be32 nfserr;
224
225 dprintk("nfsd: CREATE(3) %s %.*s\n",
226 SVCFH_fmt(&argp->fh),
227 argp->len,
228 argp->name);
229
230 dirfhp = fh_copy(&resp->dirfh, &argp->fh);
231 newfhp = fh_init(&resp->fh, NFS3_FHSIZE);
232 attr = &argp->attrs;
233
234 /* Unfudge the mode bits */
235 attr->ia_mode &= ~S_IFMT;
236 if (!(attr->ia_valid & ATTR_MODE)) {
237 attr->ia_valid |= ATTR_MODE;
238 attr->ia_mode = S_IFREG;
239 } else {
240 attr->ia_mode = (attr->ia_mode & ~S_IFMT) | S_IFREG;
241 }
242
243 /* Now create the file and set attributes */
244 nfserr = do_nfsd_create(rqstp, dirfhp, argp->name, argp->len,
245 attr, newfhp,
246 argp->createmode, (u32 *)argp->verf, NULL, NULL);
247
248 RETURN_STATUS(nfserr);
249 }
250
251 /*
252 * Make directory. This operation is not idempotent.
253 */
254 static __be32
255 nfsd3_proc_mkdir(struct svc_rqst *rqstp)
256 {
257 struct nfsd3_createargs *argp = rqstp->rq_argp;
258 struct nfsd3_diropres *resp = rqstp->rq_resp;
259 __be32 nfserr;
260
261 dprintk("nfsd: MKDIR(3) %s %.*s\n",
262 SVCFH_fmt(&argp->fh),
263 argp->len,
264 argp->name);
265
266 argp->attrs.ia_valid &= ~ATTR_SIZE;
267 fh_copy(&resp->dirfh, &argp->fh);
268 fh_init(&resp->fh, NFS3_FHSIZE);
269 nfserr = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len,
270 &argp->attrs, S_IFDIR, 0, &resp->fh);
271 fh_unlock(&resp->dirfh);
272 RETURN_STATUS(nfserr);
273 }
274
275 static __be32
276 nfsd3_proc_symlink(struct svc_rqst *rqstp)
277 {
278 struct nfsd3_symlinkargs *argp = rqstp->rq_argp;
279 struct nfsd3_diropres *resp = rqstp->rq_resp;
280 __be32 nfserr;
281
282 if (argp->tlen == 0)
283 RETURN_STATUS(nfserr_inval);
284 if (argp->tlen > NFS3_MAXPATHLEN)
285 RETURN_STATUS(nfserr_nametoolong);
286
287 argp->tname = svc_fill_symlink_pathname(rqstp, &argp->first,
288 page_address(rqstp->rq_arg.pages[0]),
289 argp->tlen);
290 if (IS_ERR(argp->tname))
291 RETURN_STATUS(nfserrno(PTR_ERR(argp->tname)));
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, &resp->fh);
302 kfree(argp->tname);
303 RETURN_STATUS(nfserr);
304 }
305
306 /*
307 * Make socket/fifo/device.
308 */
309 static __be32
310 nfsd3_proc_mknod(struct svc_rqst *rqstp)
311 {
312 struct nfsd3_mknodargs *argp = rqstp->rq_argp;
313 struct nfsd3_diropres *resp = rqstp->rq_resp;
314 __be32 nfserr;
315 int type;
316 dev_t rdev = 0;
317
318 dprintk("nfsd: MKNOD(3) %s %.*s\n",
319 SVCFH_fmt(&argp->fh),
320 argp->len,
321 argp->name);
322
323 fh_copy(&resp->dirfh, &argp->fh);
324 fh_init(&resp->fh, NFS3_FHSIZE);
325
326 if (argp->ftype == 0 || argp->ftype >= NF3BAD)
327 RETURN_STATUS(nfserr_inval);
328 if (argp->ftype == NF3CHR || argp->ftype == NF3BLK) {
329 rdev = MKDEV(argp->major, argp->minor);
330 if (MAJOR(rdev) != argp->major ||
331 MINOR(rdev) != argp->minor)
332 RETURN_STATUS(nfserr_inval);
333 } else
334 if (argp->ftype != NF3SOCK && argp->ftype != NF3FIFO)
335 RETURN_STATUS(nfserr_inval);
336
337 type = nfs3_ftypes[argp->ftype];
338 nfserr = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len,
339 &argp->attrs, type, rdev, &resp->fh);
340 fh_unlock(&resp->dirfh);
341 RETURN_STATUS(nfserr);
342 }
343
344 /*
345 * Remove file/fifo/socket etc.
346 */
347 static __be32
348 nfsd3_proc_remove(struct svc_rqst *rqstp)
349 {
350 struct nfsd3_diropargs *argp = rqstp->rq_argp;
351 struct nfsd3_attrstat *resp = rqstp->rq_resp;
352 __be32 nfserr;
353
354 dprintk("nfsd: REMOVE(3) %s %.*s\n",
355 SVCFH_fmt(&argp->fh),
356 argp->len,
357 argp->name);
358
359 /* Unlink. -S_IFDIR means file must not be a directory */
360 fh_copy(&resp->fh, &argp->fh);
361 nfserr = nfsd_unlink(rqstp, &resp->fh, -S_IFDIR, argp->name, argp->len);
362 fh_unlock(&resp->fh);
363 RETURN_STATUS(nfserr);
364 }
365
366 /*
367 * Remove a directory
368 */
369 static __be32
370 nfsd3_proc_rmdir(struct svc_rqst *rqstp)
371 {
372 struct nfsd3_diropargs *argp = rqstp->rq_argp;
373 struct nfsd3_attrstat *resp = rqstp->rq_resp;
374 __be32 nfserr;
375
376 dprintk("nfsd: RMDIR(3) %s %.*s\n",
377 SVCFH_fmt(&argp->fh),
378 argp->len,
379 argp->name);
380
381 fh_copy(&resp->fh, &argp->fh);
382 nfserr = nfsd_unlink(rqstp, &resp->fh, S_IFDIR, argp->name, argp->len);
383 fh_unlock(&resp->fh);
384 RETURN_STATUS(nfserr);
385 }
386
387 static __be32
388 nfsd3_proc_rename(struct svc_rqst *rqstp)
389 {
390 struct nfsd3_renameargs *argp = rqstp->rq_argp;
391 struct nfsd3_renameres *resp = rqstp->rq_resp;
392 __be32 nfserr;
393
394 dprintk("nfsd: RENAME(3) %s %.*s ->\n",
395 SVCFH_fmt(&argp->ffh),
396 argp->flen,
397 argp->fname);
398 dprintk("nfsd: -> %s %.*s\n",
399 SVCFH_fmt(&argp->tfh),
400 argp->tlen,
401 argp->tname);
402
403 fh_copy(&resp->ffh, &argp->ffh);
404 fh_copy(&resp->tfh, &argp->tfh);
405 nfserr = nfsd_rename(rqstp, &resp->ffh, argp->fname, argp->flen,
406 &resp->tfh, argp->tname, argp->tlen);
407 RETURN_STATUS(nfserr);
408 }
409
410 static __be32
411 nfsd3_proc_link(struct svc_rqst *rqstp)
412 {
413 struct nfsd3_linkargs *argp = rqstp->rq_argp;
414 struct nfsd3_linkres *resp = rqstp->rq_resp;
415 __be32 nfserr;
416
417 dprintk("nfsd: LINK(3) %s ->\n",
418 SVCFH_fmt(&argp->ffh));
419 dprintk("nfsd: -> %s %.*s\n",
420 SVCFH_fmt(&argp->tfh),
421 argp->tlen,
422 argp->tname);
423
424 fh_copy(&resp->fh, &argp->ffh);
425 fh_copy(&resp->tfh, &argp->tfh);
426 nfserr = nfsd_link(rqstp, &resp->tfh, argp->tname, argp->tlen,
427 &resp->fh);
428 RETURN_STATUS(nfserr);
429 }
430
431 /*
432 * Read a portion of a directory.
433 */
434 static __be32
435 nfsd3_proc_readdir(struct svc_rqst *rqstp)
436 {
437 struct nfsd3_readdirargs *argp = rqstp->rq_argp;
438 struct nfsd3_readdirres *resp = rqstp->rq_resp;
439 __be32 nfserr;
440 int count = 0;
441 struct page **p;
442 caddr_t page_addr = NULL;
443
444 dprintk("nfsd: READDIR(3) %s %d bytes at %d\n",
445 SVCFH_fmt(&argp->fh),
446 argp->count, (u32) argp->cookie);
447
448 /* Make sure we've room for the NULL ptr & eof flag, and shrink to
449 * client read size */
450 count = (argp->count >> 2) - 2;
451
452 /* Read directory and encode entries on the fly */
453 fh_copy(&resp->fh, &argp->fh);
454
455 resp->buflen = count;
456 resp->common.err = nfs_ok;
457 resp->buffer = argp->buffer;
458 resp->rqstp = rqstp;
459 nfserr = nfsd_readdir(rqstp, &resp->fh, (loff_t*) &argp->cookie,
460 &resp->common, nfs3svc_encode_entry);
461 memcpy(resp->verf, argp->verf, 8);
462 count = 0;
463 for (p = rqstp->rq_respages + 1; p < rqstp->rq_next_page; p++) {
464 page_addr = page_address(*p);
465
466 if (((caddr_t)resp->buffer >= page_addr) &&
467 ((caddr_t)resp->buffer < page_addr + PAGE_SIZE)) {
468 count += (caddr_t)resp->buffer - page_addr;
469 break;
470 }
471 count += PAGE_SIZE;
472 }
473 resp->count = count >> 2;
474 if (resp->offset) {
475 loff_t offset = argp->cookie;
476
477 if (unlikely(resp->offset1)) {
478 /* we ended up with offset on a page boundary */
479 *resp->offset = htonl(offset >> 32);
480 *resp->offset1 = htonl(offset & 0xffffffff);
481 resp->offset1 = NULL;
482 } else {
483 xdr_encode_hyper(resp->offset, offset);
484 }
485 resp->offset = NULL;
486 }
487
488 RETURN_STATUS(nfserr);
489 }
490
491 /*
492 * Read a portion of a directory, including file handles and attrs.
493 * For now, we choose to ignore the dircount parameter.
494 */
495 static __be32
496 nfsd3_proc_readdirplus(struct svc_rqst *rqstp)
497 {
498 struct nfsd3_readdirargs *argp = rqstp->rq_argp;
499 struct nfsd3_readdirres *resp = rqstp->rq_resp;
500 __be32 nfserr;
501 int count = 0;
502 loff_t offset;
503 struct page **p;
504 caddr_t page_addr = NULL;
505
506 dprintk("nfsd: READDIR+(3) %s %d bytes at %d\n",
507 SVCFH_fmt(&argp->fh),
508 argp->count, (u32) argp->cookie);
509
510 /* Convert byte count to number of words (i.e. >> 2),
511 * and reserve room for the NULL ptr & eof flag (-2 words) */
512 resp->count = (argp->count >> 2) - 2;
513
514 /* Read directory and encode entries on the fly */
515 fh_copy(&resp->fh, &argp->fh);
516
517 resp->common.err = nfs_ok;
518 resp->buffer = argp->buffer;
519 resp->buflen = resp->count;
520 resp->rqstp = rqstp;
521 offset = argp->cookie;
522
523 nfserr = fh_verify(rqstp, &resp->fh, S_IFDIR, NFSD_MAY_NOP);
524 if (nfserr)
525 RETURN_STATUS(nfserr);
526
527 if (resp->fh.fh_export->ex_flags & NFSEXP_NOREADDIRPLUS)
528 RETURN_STATUS(nfserr_notsupp);
529
530 nfserr = nfsd_readdir(rqstp, &resp->fh,
531 &offset,
532 &resp->common,
533 nfs3svc_encode_entry_plus);
534 memcpy(resp->verf, argp->verf, 8);
535 for (p = rqstp->rq_respages + 1; p < rqstp->rq_next_page; p++) {
536 page_addr = page_address(*p);
537
538 if (((caddr_t)resp->buffer >= page_addr) &&
539 ((caddr_t)resp->buffer < page_addr + PAGE_SIZE)) {
540 count += (caddr_t)resp->buffer - page_addr;
541 break;
542 }
543 count += PAGE_SIZE;
544 }
545 resp->count = count >> 2;
546 if (resp->offset) {
547 if (unlikely(resp->offset1)) {
548 /* we ended up with offset on a page boundary */
549 *resp->offset = htonl(offset >> 32);
550 *resp->offset1 = htonl(offset & 0xffffffff);
551 resp->offset1 = NULL;
552 } else {
553 xdr_encode_hyper(resp->offset, offset);
554 }
555 resp->offset = NULL;
556 }
557
558 RETURN_STATUS(nfserr);
559 }
560
561 /*
562 * Get file system stats
563 */
564 static __be32
565 nfsd3_proc_fsstat(struct svc_rqst *rqstp)
566 {
567 struct nfsd_fhandle *argp = rqstp->rq_argp;
568 struct nfsd3_fsstatres *resp = rqstp->rq_resp;
569 __be32 nfserr;
570
571 dprintk("nfsd: FSSTAT(3) %s\n",
572 SVCFH_fmt(&argp->fh));
573
574 nfserr = nfsd_statfs(rqstp, &argp->fh, &resp->stats, 0);
575 fh_put(&argp->fh);
576 RETURN_STATUS(nfserr);
577 }
578
579 /*
580 * Get file system info
581 */
582 static __be32
583 nfsd3_proc_fsinfo(struct svc_rqst *rqstp)
584 {
585 struct nfsd_fhandle *argp = rqstp->rq_argp;
586 struct nfsd3_fsinfores *resp = rqstp->rq_resp;
587 __be32 nfserr;
588 u32 max_blocksize = svc_max_payload(rqstp);
589
590 dprintk("nfsd: FSINFO(3) %s\n",
591 SVCFH_fmt(&argp->fh));
592
593 resp->f_rtmax = max_blocksize;
594 resp->f_rtpref = max_blocksize;
595 resp->f_rtmult = PAGE_SIZE;
596 resp->f_wtmax = max_blocksize;
597 resp->f_wtpref = max_blocksize;
598 resp->f_wtmult = PAGE_SIZE;
599 resp->f_dtpref = max_blocksize;
600 resp->f_maxfilesize = ~(u32) 0;
601 resp->f_properties = NFS3_FSF_DEFAULT;
602
603 nfserr = fh_verify(rqstp, &argp->fh, 0,
604 NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT);
605
606 /* Check special features of the file system. May request
607 * different read/write sizes for file systems known to have
608 * problems with large blocks */
609 if (nfserr == 0) {
610 struct super_block *sb = argp->fh.fh_dentry->d_sb;
611
612 /* Note that we don't care for remote fs's here */
613 if (sb->s_magic == MSDOS_SUPER_MAGIC) {
614 resp->f_properties = NFS3_FSF_BILLYBOY;
615 }
616 resp->f_maxfilesize = sb->s_maxbytes;
617 }
618
619 fh_put(&argp->fh);
620 RETURN_STATUS(nfserr);
621 }
622
623 /*
624 * Get pathconf info for the specified file
625 */
626 static __be32
627 nfsd3_proc_pathconf(struct svc_rqst *rqstp)
628 {
629 struct nfsd_fhandle *argp = rqstp->rq_argp;
630 struct nfsd3_pathconfres *resp = rqstp->rq_resp;
631 __be32 nfserr;
632
633 dprintk("nfsd: PATHCONF(3) %s\n",
634 SVCFH_fmt(&argp->fh));
635
636 /* Set default pathconf */
637 resp->p_link_max = 255; /* at least */
638 resp->p_name_max = 255; /* at least */
639 resp->p_no_trunc = 0;
640 resp->p_chown_restricted = 1;
641 resp->p_case_insensitive = 0;
642 resp->p_case_preserving = 1;
643
644 nfserr = fh_verify(rqstp, &argp->fh, 0, NFSD_MAY_NOP);
645
646 if (nfserr == 0) {
647 struct super_block *sb = argp->fh.fh_dentry->d_sb;
648
649 /* Note that we don't care for remote fs's here */
650 switch (sb->s_magic) {
651 case EXT2_SUPER_MAGIC:
652 resp->p_link_max = EXT2_LINK_MAX;
653 resp->p_name_max = EXT2_NAME_LEN;
654 break;
655 case MSDOS_SUPER_MAGIC:
656 resp->p_case_insensitive = 1;
657 resp->p_case_preserving = 0;
658 break;
659 }
660 }
661
662 fh_put(&argp->fh);
663 RETURN_STATUS(nfserr);
664 }
665
666
667 /*
668 * Commit a file (range) to stable storage.
669 */
670 static __be32
671 nfsd3_proc_commit(struct svc_rqst *rqstp)
672 {
673 struct nfsd3_commitargs *argp = rqstp->rq_argp;
674 struct nfsd3_commitres *resp = rqstp->rq_resp;
675 __be32 nfserr;
676
677 dprintk("nfsd: COMMIT(3) %s %u@%Lu\n",
678 SVCFH_fmt(&argp->fh),
679 argp->count,
680 (unsigned long long) argp->offset);
681
682 if (argp->offset > NFS_OFFSET_MAX)
683 RETURN_STATUS(nfserr_inval);
684
685 fh_copy(&resp->fh, &argp->fh);
686 nfserr = nfsd_commit(rqstp, &resp->fh, argp->offset, argp->count,
687 resp->verf);
688
689 RETURN_STATUS(nfserr);
690 }
691
692
693 /*
694 * NFSv3 Server procedures.
695 * Only the results of non-idempotent operations are cached.
696 */
697 #define nfs3svc_decode_fhandleargs nfs3svc_decode_fhandle
698 #define nfs3svc_encode_attrstatres nfs3svc_encode_attrstat
699 #define nfs3svc_encode_wccstatres nfs3svc_encode_wccstat
700 #define nfsd3_mkdirargs nfsd3_createargs
701 #define nfsd3_readdirplusargs nfsd3_readdirargs
702 #define nfsd3_fhandleargs nfsd_fhandle
703 #define nfsd3_fhandleres nfsd3_attrstat
704 #define nfsd3_attrstatres nfsd3_attrstat
705 #define nfsd3_wccstatres nfsd3_attrstat
706 #define nfsd3_createres nfsd3_diropres
707 #define nfsd3_voidres nfsd3_voidargs
708 struct nfsd3_voidargs { int dummy; };
709
710 #define ST 1 /* status*/
711 #define FH 17 /* filehandle with length */
712 #define AT 21 /* attributes */
713 #define pAT (1+AT) /* post attributes - conditional */
714 #define WC (7+pAT) /* WCC attributes */
715
716 static const struct svc_procedure nfsd_procedures3[22] = {
717 [NFS3PROC_NULL] = {
718 .pc_func = nfsd3_proc_null,
719 .pc_encode = nfs3svc_encode_voidres,
720 .pc_argsize = sizeof(struct nfsd3_voidargs),
721 .pc_ressize = sizeof(struct nfsd3_voidres),
722 .pc_cachetype = RC_NOCACHE,
723 .pc_xdrressize = ST,
724 },
725 [NFS3PROC_GETATTR] = {
726 .pc_func = nfsd3_proc_getattr,
727 .pc_decode = nfs3svc_decode_fhandleargs,
728 .pc_encode = nfs3svc_encode_attrstatres,
729 .pc_release = nfs3svc_release_fhandle,
730 .pc_argsize = sizeof(struct nfsd3_fhandleargs),
731 .pc_ressize = sizeof(struct nfsd3_attrstatres),
732 .pc_cachetype = RC_NOCACHE,
733 .pc_xdrressize = ST+AT,
734 },
735 [NFS3PROC_SETATTR] = {
736 .pc_func = nfsd3_proc_setattr,
737 .pc_decode = nfs3svc_decode_sattrargs,
738 .pc_encode = nfs3svc_encode_wccstatres,
739 .pc_release = nfs3svc_release_fhandle,
740 .pc_argsize = sizeof(struct nfsd3_sattrargs),
741 .pc_ressize = sizeof(struct nfsd3_wccstatres),
742 .pc_cachetype = RC_REPLBUFF,
743 .pc_xdrressize = ST+WC,
744 },
745 [NFS3PROC_LOOKUP] = {
746 .pc_func = nfsd3_proc_lookup,
747 .pc_decode = nfs3svc_decode_diropargs,
748 .pc_encode = nfs3svc_encode_diropres,
749 .pc_release = nfs3svc_release_fhandle2,
750 .pc_argsize = sizeof(struct nfsd3_diropargs),
751 .pc_ressize = sizeof(struct nfsd3_diropres),
752 .pc_cachetype = RC_NOCACHE,
753 .pc_xdrressize = ST+FH+pAT+pAT,
754 },
755 [NFS3PROC_ACCESS] = {
756 .pc_func = nfsd3_proc_access,
757 .pc_decode = nfs3svc_decode_accessargs,
758 .pc_encode = nfs3svc_encode_accessres,
759 .pc_release = nfs3svc_release_fhandle,
760 .pc_argsize = sizeof(struct nfsd3_accessargs),
761 .pc_ressize = sizeof(struct nfsd3_accessres),
762 .pc_cachetype = RC_NOCACHE,
763 .pc_xdrressize = ST+pAT+1,
764 },
765 [NFS3PROC_READLINK] = {
766 .pc_func = nfsd3_proc_readlink,
767 .pc_decode = nfs3svc_decode_readlinkargs,
768 .pc_encode = nfs3svc_encode_readlinkres,
769 .pc_release = nfs3svc_release_fhandle,
770 .pc_argsize = sizeof(struct nfsd3_readlinkargs),
771 .pc_ressize = sizeof(struct nfsd3_readlinkres),
772 .pc_cachetype = RC_NOCACHE,
773 .pc_xdrressize = ST+pAT+1+NFS3_MAXPATHLEN/4,
774 },
775 [NFS3PROC_READ] = {
776 .pc_func = nfsd3_proc_read,
777 .pc_decode = nfs3svc_decode_readargs,
778 .pc_encode = nfs3svc_encode_readres,
779 .pc_release = nfs3svc_release_fhandle,
780 .pc_argsize = sizeof(struct nfsd3_readargs),
781 .pc_ressize = sizeof(struct nfsd3_readres),
782 .pc_cachetype = RC_NOCACHE,
783 .pc_xdrressize = ST+pAT+4+NFSSVC_MAXBLKSIZE/4,
784 },
785 [NFS3PROC_WRITE] = {
786 .pc_func = nfsd3_proc_write,
787 .pc_decode = nfs3svc_decode_writeargs,
788 .pc_encode = nfs3svc_encode_writeres,
789 .pc_release = nfs3svc_release_fhandle,
790 .pc_argsize = sizeof(struct nfsd3_writeargs),
791 .pc_ressize = sizeof(struct nfsd3_writeres),
792 .pc_cachetype = RC_REPLBUFF,
793 .pc_xdrressize = ST+WC+4,
794 },
795 [NFS3PROC_CREATE] = {
796 .pc_func = nfsd3_proc_create,
797 .pc_decode = nfs3svc_decode_createargs,
798 .pc_encode = nfs3svc_encode_createres,
799 .pc_release = nfs3svc_release_fhandle2,
800 .pc_argsize = sizeof(struct nfsd3_createargs),
801 .pc_ressize = sizeof(struct nfsd3_createres),
802 .pc_cachetype = RC_REPLBUFF,
803 .pc_xdrressize = ST+(1+FH+pAT)+WC,
804 },
805 [NFS3PROC_MKDIR] = {
806 .pc_func = nfsd3_proc_mkdir,
807 .pc_decode = nfs3svc_decode_mkdirargs,
808 .pc_encode = nfs3svc_encode_createres,
809 .pc_release = nfs3svc_release_fhandle2,
810 .pc_argsize = sizeof(struct nfsd3_mkdirargs),
811 .pc_ressize = sizeof(struct nfsd3_createres),
812 .pc_cachetype = RC_REPLBUFF,
813 .pc_xdrressize = ST+(1+FH+pAT)+WC,
814 },
815 [NFS3PROC_SYMLINK] = {
816 .pc_func = nfsd3_proc_symlink,
817 .pc_decode = nfs3svc_decode_symlinkargs,
818 .pc_encode = nfs3svc_encode_createres,
819 .pc_release = nfs3svc_release_fhandle2,
820 .pc_argsize = sizeof(struct nfsd3_symlinkargs),
821 .pc_ressize = sizeof(struct nfsd3_createres),
822 .pc_cachetype = RC_REPLBUFF,
823 .pc_xdrressize = ST+(1+FH+pAT)+WC,
824 },
825 [NFS3PROC_MKNOD] = {
826 .pc_func = nfsd3_proc_mknod,
827 .pc_decode = nfs3svc_decode_mknodargs,
828 .pc_encode = nfs3svc_encode_createres,
829 .pc_release = nfs3svc_release_fhandle2,
830 .pc_argsize = sizeof(struct nfsd3_mknodargs),
831 .pc_ressize = sizeof(struct nfsd3_createres),
832 .pc_cachetype = RC_REPLBUFF,
833 .pc_xdrressize = ST+(1+FH+pAT)+WC,
834 },
835 [NFS3PROC_REMOVE] = {
836 .pc_func = nfsd3_proc_remove,
837 .pc_decode = nfs3svc_decode_diropargs,
838 .pc_encode = nfs3svc_encode_wccstatres,
839 .pc_release = nfs3svc_release_fhandle,
840 .pc_argsize = sizeof(struct nfsd3_diropargs),
841 .pc_ressize = sizeof(struct nfsd3_wccstatres),
842 .pc_cachetype = RC_REPLBUFF,
843 .pc_xdrressize = ST+WC,
844 },
845 [NFS3PROC_RMDIR] = {
846 .pc_func = nfsd3_proc_rmdir,
847 .pc_decode = nfs3svc_decode_diropargs,
848 .pc_encode = nfs3svc_encode_wccstatres,
849 .pc_release = nfs3svc_release_fhandle,
850 .pc_argsize = sizeof(struct nfsd3_diropargs),
851 .pc_ressize = sizeof(struct nfsd3_wccstatres),
852 .pc_cachetype = RC_REPLBUFF,
853 .pc_xdrressize = ST+WC,
854 },
855 [NFS3PROC_RENAME] = {
856 .pc_func = nfsd3_proc_rename,
857 .pc_decode = nfs3svc_decode_renameargs,
858 .pc_encode = nfs3svc_encode_renameres,
859 .pc_release = nfs3svc_release_fhandle2,
860 .pc_argsize = sizeof(struct nfsd3_renameargs),
861 .pc_ressize = sizeof(struct nfsd3_renameres),
862 .pc_cachetype = RC_REPLBUFF,
863 .pc_xdrressize = ST+WC+WC,
864 },
865 [NFS3PROC_LINK] = {
866 .pc_func = nfsd3_proc_link,
867 .pc_decode = nfs3svc_decode_linkargs,
868 .pc_encode = nfs3svc_encode_linkres,
869 .pc_release = nfs3svc_release_fhandle2,
870 .pc_argsize = sizeof(struct nfsd3_linkargs),
871 .pc_ressize = sizeof(struct nfsd3_linkres),
872 .pc_cachetype = RC_REPLBUFF,
873 .pc_xdrressize = ST+pAT+WC,
874 },
875 [NFS3PROC_READDIR] = {
876 .pc_func = nfsd3_proc_readdir,
877 .pc_decode = nfs3svc_decode_readdirargs,
878 .pc_encode = nfs3svc_encode_readdirres,
879 .pc_release = nfs3svc_release_fhandle,
880 .pc_argsize = sizeof(struct nfsd3_readdirargs),
881 .pc_ressize = sizeof(struct nfsd3_readdirres),
882 .pc_cachetype = RC_NOCACHE,
883 },
884 [NFS3PROC_READDIRPLUS] = {
885 .pc_func = nfsd3_proc_readdirplus,
886 .pc_decode = nfs3svc_decode_readdirplusargs,
887 .pc_encode = nfs3svc_encode_readdirres,
888 .pc_release = nfs3svc_release_fhandle,
889 .pc_argsize = sizeof(struct nfsd3_readdirplusargs),
890 .pc_ressize = sizeof(struct nfsd3_readdirres),
891 .pc_cachetype = RC_NOCACHE,
892 },
893 [NFS3PROC_FSSTAT] = {
894 .pc_func = nfsd3_proc_fsstat,
895 .pc_decode = nfs3svc_decode_fhandleargs,
896 .pc_encode = nfs3svc_encode_fsstatres,
897 .pc_argsize = sizeof(struct nfsd3_fhandleargs),
898 .pc_ressize = sizeof(struct nfsd3_fsstatres),
899 .pc_cachetype = RC_NOCACHE,
900 .pc_xdrressize = ST+pAT+2*6+1,
901 },
902 [NFS3PROC_FSINFO] = {
903 .pc_func = nfsd3_proc_fsinfo,
904 .pc_decode = nfs3svc_decode_fhandleargs,
905 .pc_encode = nfs3svc_encode_fsinfores,
906 .pc_argsize = sizeof(struct nfsd3_fhandleargs),
907 .pc_ressize = sizeof(struct nfsd3_fsinfores),
908 .pc_cachetype = RC_NOCACHE,
909 .pc_xdrressize = ST+pAT+12,
910 },
911 [NFS3PROC_PATHCONF] = {
912 .pc_func = nfsd3_proc_pathconf,
913 .pc_decode = nfs3svc_decode_fhandleargs,
914 .pc_encode = nfs3svc_encode_pathconfres,
915 .pc_argsize = sizeof(struct nfsd3_fhandleargs),
916 .pc_ressize = sizeof(struct nfsd3_pathconfres),
917 .pc_cachetype = RC_NOCACHE,
918 .pc_xdrressize = ST+pAT+6,
919 },
920 [NFS3PROC_COMMIT] = {
921 .pc_func = nfsd3_proc_commit,
922 .pc_decode = nfs3svc_decode_commitargs,
923 .pc_encode = nfs3svc_encode_commitres,
924 .pc_release = nfs3svc_release_fhandle,
925 .pc_argsize = sizeof(struct nfsd3_commitargs),
926 .pc_ressize = sizeof(struct nfsd3_commitres),
927 .pc_cachetype = RC_NOCACHE,
928 .pc_xdrressize = ST+WC+2,
929 },
930 };
931
932 static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures3)];
933 const struct svc_version nfsd_version3 = {
934 .vs_vers = 3,
935 .vs_nproc = 22,
936 .vs_proc = nfsd_procedures3,
937 .vs_dispatch = nfsd_dispatch,
938 .vs_count = nfsd_count3,
939 .vs_xdrsize = NFS3_SVC_XDRSIZE,
940 };
Linux with added FPC-III support