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NFSD: Clean up legacy NFS WRITE argument XDR decoders
[mirror_ubuntu-eoan-kernel.git] / fs / nfsd / nfs3proc.c
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 if (nfserr == 0) {
177 struct inode *inode = d_inode(resp->fh.fh_dentry);
178 resp->eof = nfsd_eof_on_read(cnt, resp->count, argp->offset,
179 inode->i_size);
180 }
181
182 RETURN_STATUS(nfserr);
183 }
184
185 /*
186 * Write data to a file
187 */
188 static __be32
189 nfsd3_proc_write(struct svc_rqst *rqstp)
190 {
191 struct nfsd3_writeargs *argp = rqstp->rq_argp;
192 struct nfsd3_writeres *resp = rqstp->rq_resp;
193 __be32 nfserr;
194 unsigned long cnt = argp->len;
195 unsigned int nvecs;
196
197 dprintk("nfsd: WRITE(3) %s %d bytes at %Lu%s\n",
198 SVCFH_fmt(&argp->fh),
199 argp->len,
200 (unsigned long long) argp->offset,
201 argp->stable? " stable" : "");
202
203 fh_copy(&resp->fh, &argp->fh);
204 resp->committed = argp->stable;
205 nvecs = svc_fill_write_vector(rqstp, &argp->first, cnt);
206 if (!nvecs)
207 RETURN_STATUS(nfserr_io);
208 nfserr = nfsd_write(rqstp, &resp->fh, argp->offset,
209 rqstp->rq_vec, nvecs, &cnt,
210 resp->committed);
211 resp->count = cnt;
212 RETURN_STATUS(nfserr);
213 }
214
215 /*
216 * With NFSv3, CREATE processing is a lot easier than with NFSv2.
217 * At least in theory; we'll see how it fares in practice when the
218 * first reports about SunOS compatibility problems start to pour in...
219 */
220 static __be32
221 nfsd3_proc_create(struct svc_rqst *rqstp)
222 {
223 struct nfsd3_createargs *argp = rqstp->rq_argp;
224 struct nfsd3_diropres *resp = rqstp->rq_resp;
225 svc_fh *dirfhp, *newfhp = NULL;
226 struct iattr *attr;
227 __be32 nfserr;
228
229 dprintk("nfsd: CREATE(3) %s %.*s\n",
230 SVCFH_fmt(&argp->fh),
231 argp->len,
232 argp->name);
233
234 dirfhp = fh_copy(&resp->dirfh, &argp->fh);
235 newfhp = fh_init(&resp->fh, NFS3_FHSIZE);
236 attr = &argp->attrs;
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, (u32 *)argp->verf, NULL, NULL);
251
252 RETURN_STATUS(nfserr);
253 }
254
255 /*
256 * Make directory. This operation is not idempotent.
257 */
258 static __be32
259 nfsd3_proc_mkdir(struct svc_rqst *rqstp)
260 {
261 struct nfsd3_createargs *argp = rqstp->rq_argp;
262 struct nfsd3_diropres *resp = rqstp->rq_resp;
263 __be32 nfserr;
264
265 dprintk("nfsd: MKDIR(3) %s %.*s\n",
266 SVCFH_fmt(&argp->fh),
267 argp->len,
268 argp->name);
269
270 argp->attrs.ia_valid &= ~ATTR_SIZE;
271 fh_copy(&resp->dirfh, &argp->fh);
272 fh_init(&resp->fh, NFS3_FHSIZE);
273 nfserr = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len,
274 &argp->attrs, S_IFDIR, 0, &resp->fh);
275 fh_unlock(&resp->dirfh);
276 RETURN_STATUS(nfserr);
277 }
278
279 static __be32
280 nfsd3_proc_symlink(struct svc_rqst *rqstp)
281 {
282 struct nfsd3_symlinkargs *argp = rqstp->rq_argp;
283 struct nfsd3_diropres *resp = rqstp->rq_resp;
284 __be32 nfserr;
285
286 dprintk("nfsd: SYMLINK(3) %s %.*s -> %.*s\n",
287 SVCFH_fmt(&argp->ffh),
288 argp->flen, argp->fname,
289 argp->tlen, argp->tname);
290
291 fh_copy(&resp->dirfh, &argp->ffh);
292 fh_init(&resp->fh, NFS3_FHSIZE);
293 nfserr = nfsd_symlink(rqstp, &resp->dirfh, argp->fname, argp->flen,
294 argp->tname, &resp->fh);
295 RETURN_STATUS(nfserr);
296 }
297
298 /*
299 * Make socket/fifo/device.
300 */
301 static __be32
302 nfsd3_proc_mknod(struct svc_rqst *rqstp)
303 {
304 struct nfsd3_mknodargs *argp = rqstp->rq_argp;
305 struct nfsd3_diropres *resp = rqstp->rq_resp;
306 __be32 nfserr;
307 int type;
308 dev_t rdev = 0;
309
310 dprintk("nfsd: MKNOD(3) %s %.*s\n",
311 SVCFH_fmt(&argp->fh),
312 argp->len,
313 argp->name);
314
315 fh_copy(&resp->dirfh, &argp->fh);
316 fh_init(&resp->fh, NFS3_FHSIZE);
317
318 if (argp->ftype == 0 || argp->ftype >= NF3BAD)
319 RETURN_STATUS(nfserr_inval);
320 if (argp->ftype == NF3CHR || argp->ftype == NF3BLK) {
321 rdev = MKDEV(argp->major, argp->minor);
322 if (MAJOR(rdev) != argp->major ||
323 MINOR(rdev) != argp->minor)
324 RETURN_STATUS(nfserr_inval);
325 } else
326 if (argp->ftype != NF3SOCK && argp->ftype != NF3FIFO)
327 RETURN_STATUS(nfserr_inval);
328
329 type = nfs3_ftypes[argp->ftype];
330 nfserr = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len,
331 &argp->attrs, type, rdev, &resp->fh);
332 fh_unlock(&resp->dirfh);
333 RETURN_STATUS(nfserr);
334 }
335
336 /*
337 * Remove file/fifo/socket etc.
338 */
339 static __be32
340 nfsd3_proc_remove(struct svc_rqst *rqstp)
341 {
342 struct nfsd3_diropargs *argp = rqstp->rq_argp;
343 struct nfsd3_attrstat *resp = rqstp->rq_resp;
344 __be32 nfserr;
345
346 dprintk("nfsd: REMOVE(3) %s %.*s\n",
347 SVCFH_fmt(&argp->fh),
348 argp->len,
349 argp->name);
350
351 /* Unlink. -S_IFDIR means file must not be a directory */
352 fh_copy(&resp->fh, &argp->fh);
353 nfserr = nfsd_unlink(rqstp, &resp->fh, -S_IFDIR, argp->name, argp->len);
354 fh_unlock(&resp->fh);
355 RETURN_STATUS(nfserr);
356 }
357
358 /*
359 * Remove a directory
360 */
361 static __be32
362 nfsd3_proc_rmdir(struct svc_rqst *rqstp)
363 {
364 struct nfsd3_diropargs *argp = rqstp->rq_argp;
365 struct nfsd3_attrstat *resp = rqstp->rq_resp;
366 __be32 nfserr;
367
368 dprintk("nfsd: RMDIR(3) %s %.*s\n",
369 SVCFH_fmt(&argp->fh),
370 argp->len,
371 argp->name);
372
373 fh_copy(&resp->fh, &argp->fh);
374 nfserr = nfsd_unlink(rqstp, &resp->fh, S_IFDIR, argp->name, argp->len);
375 fh_unlock(&resp->fh);
376 RETURN_STATUS(nfserr);
377 }
378
379 static __be32
380 nfsd3_proc_rename(struct svc_rqst *rqstp)
381 {
382 struct nfsd3_renameargs *argp = rqstp->rq_argp;
383 struct nfsd3_renameres *resp = rqstp->rq_resp;
384 __be32 nfserr;
385
386 dprintk("nfsd: RENAME(3) %s %.*s ->\n",
387 SVCFH_fmt(&argp->ffh),
388 argp->flen,
389 argp->fname);
390 dprintk("nfsd: -> %s %.*s\n",
391 SVCFH_fmt(&argp->tfh),
392 argp->tlen,
393 argp->tname);
394
395 fh_copy(&resp->ffh, &argp->ffh);
396 fh_copy(&resp->tfh, &argp->tfh);
397 nfserr = nfsd_rename(rqstp, &resp->ffh, argp->fname, argp->flen,
398 &resp->tfh, argp->tname, argp->tlen);
399 RETURN_STATUS(nfserr);
400 }
401
402 static __be32
403 nfsd3_proc_link(struct svc_rqst *rqstp)
404 {
405 struct nfsd3_linkargs *argp = rqstp->rq_argp;
406 struct nfsd3_linkres *resp = rqstp->rq_resp;
407 __be32 nfserr;
408
409 dprintk("nfsd: LINK(3) %s ->\n",
410 SVCFH_fmt(&argp->ffh));
411 dprintk("nfsd: -> %s %.*s\n",
412 SVCFH_fmt(&argp->tfh),
413 argp->tlen,
414 argp->tname);
415
416 fh_copy(&resp->fh, &argp->ffh);
417 fh_copy(&resp->tfh, &argp->tfh);
418 nfserr = nfsd_link(rqstp, &resp->tfh, argp->tname, argp->tlen,
419 &resp->fh);
420 RETURN_STATUS(nfserr);
421 }
422
423 /*
424 * Read a portion of a directory.
425 */
426 static __be32
427 nfsd3_proc_readdir(struct svc_rqst *rqstp)
428 {
429 struct nfsd3_readdirargs *argp = rqstp->rq_argp;
430 struct nfsd3_readdirres *resp = rqstp->rq_resp;
431 __be32 nfserr;
432 int count;
433
434 dprintk("nfsd: READDIR(3) %s %d bytes at %d\n",
435 SVCFH_fmt(&argp->fh),
436 argp->count, (u32) argp->cookie);
437
438 /* Make sure we've room for the NULL ptr & eof flag, and shrink to
439 * client read size */
440 count = (argp->count >> 2) - 2;
441
442 /* Read directory and encode entries on the fly */
443 fh_copy(&resp->fh, &argp->fh);
444
445 resp->buflen = count;
446 resp->common.err = nfs_ok;
447 resp->buffer = argp->buffer;
448 resp->rqstp = rqstp;
449 nfserr = nfsd_readdir(rqstp, &resp->fh, (loff_t*) &argp->cookie,
450 &resp->common, nfs3svc_encode_entry);
451 memcpy(resp->verf, argp->verf, 8);
452 resp->count = resp->buffer - argp->buffer;
453 if (resp->offset)
454 xdr_encode_hyper(resp->offset, argp->cookie);
455
456 RETURN_STATUS(nfserr);
457 }
458
459 /*
460 * Read a portion of a directory, including file handles and attrs.
461 * For now, we choose to ignore the dircount parameter.
462 */
463 static __be32
464 nfsd3_proc_readdirplus(struct svc_rqst *rqstp)
465 {
466 struct nfsd3_readdirargs *argp = rqstp->rq_argp;
467 struct nfsd3_readdirres *resp = rqstp->rq_resp;
468 __be32 nfserr;
469 int count = 0;
470 loff_t offset;
471 struct page **p;
472 caddr_t page_addr = NULL;
473
474 dprintk("nfsd: READDIR+(3) %s %d bytes at %d\n",
475 SVCFH_fmt(&argp->fh),
476 argp->count, (u32) argp->cookie);
477
478 /* Convert byte count to number of words (i.e. >> 2),
479 * and reserve room for the NULL ptr & eof flag (-2 words) */
480 resp->count = (argp->count >> 2) - 2;
481
482 /* Read directory and encode entries on the fly */
483 fh_copy(&resp->fh, &argp->fh);
484
485 resp->common.err = nfs_ok;
486 resp->buffer = argp->buffer;
487 resp->buflen = resp->count;
488 resp->rqstp = rqstp;
489 offset = argp->cookie;
490
491 nfserr = fh_verify(rqstp, &resp->fh, S_IFDIR, NFSD_MAY_NOP);
492 if (nfserr)
493 RETURN_STATUS(nfserr);
494
495 if (resp->fh.fh_export->ex_flags & NFSEXP_NOREADDIRPLUS)
496 RETURN_STATUS(nfserr_notsupp);
497
498 nfserr = nfsd_readdir(rqstp, &resp->fh,
499 &offset,
500 &resp->common,
501 nfs3svc_encode_entry_plus);
502 memcpy(resp->verf, argp->verf, 8);
503 for (p = rqstp->rq_respages + 1; p < rqstp->rq_next_page; p++) {
504 page_addr = page_address(*p);
505
506 if (((caddr_t)resp->buffer >= page_addr) &&
507 ((caddr_t)resp->buffer < page_addr + PAGE_SIZE)) {
508 count += (caddr_t)resp->buffer - page_addr;
509 break;
510 }
511 count += PAGE_SIZE;
512 }
513 resp->count = count >> 2;
514 if (resp->offset) {
515 if (unlikely(resp->offset1)) {
516 /* we ended up with offset on a page boundary */
517 *resp->offset = htonl(offset >> 32);
518 *resp->offset1 = htonl(offset & 0xffffffff);
519 resp->offset1 = NULL;
520 } else {
521 xdr_encode_hyper(resp->offset, offset);
522 }
523 }
524
525 RETURN_STATUS(nfserr);
526 }
527
528 /*
529 * Get file system stats
530 */
531 static __be32
532 nfsd3_proc_fsstat(struct svc_rqst *rqstp)
533 {
534 struct nfsd_fhandle *argp = rqstp->rq_argp;
535 struct nfsd3_fsstatres *resp = rqstp->rq_resp;
536 __be32 nfserr;
537
538 dprintk("nfsd: FSSTAT(3) %s\n",
539 SVCFH_fmt(&argp->fh));
540
541 nfserr = nfsd_statfs(rqstp, &argp->fh, &resp->stats, 0);
542 fh_put(&argp->fh);
543 RETURN_STATUS(nfserr);
544 }
545
546 /*
547 * Get file system info
548 */
549 static __be32
550 nfsd3_proc_fsinfo(struct svc_rqst *rqstp)
551 {
552 struct nfsd_fhandle *argp = rqstp->rq_argp;
553 struct nfsd3_fsinfores *resp = rqstp->rq_resp;
554 __be32 nfserr;
555 u32 max_blocksize = svc_max_payload(rqstp);
556
557 dprintk("nfsd: FSINFO(3) %s\n",
558 SVCFH_fmt(&argp->fh));
559
560 resp->f_rtmax = max_blocksize;
561 resp->f_rtpref = max_blocksize;
562 resp->f_rtmult = PAGE_SIZE;
563 resp->f_wtmax = max_blocksize;
564 resp->f_wtpref = max_blocksize;
565 resp->f_wtmult = PAGE_SIZE;
566 resp->f_dtpref = PAGE_SIZE;
567 resp->f_maxfilesize = ~(u32) 0;
568 resp->f_properties = NFS3_FSF_DEFAULT;
569
570 nfserr = fh_verify(rqstp, &argp->fh, 0,
571 NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT);
572
573 /* Check special features of the file system. May request
574 * different read/write sizes for file systems known to have
575 * problems with large blocks */
576 if (nfserr == 0) {
577 struct super_block *sb = argp->fh.fh_dentry->d_sb;
578
579 /* Note that we don't care for remote fs's here */
580 if (sb->s_magic == MSDOS_SUPER_MAGIC) {
581 resp->f_properties = NFS3_FSF_BILLYBOY;
582 }
583 resp->f_maxfilesize = sb->s_maxbytes;
584 }
585
586 fh_put(&argp->fh);
587 RETURN_STATUS(nfserr);
588 }
589
590 /*
591 * Get pathconf info for the specified file
592 */
593 static __be32
594 nfsd3_proc_pathconf(struct svc_rqst *rqstp)
595 {
596 struct nfsd_fhandle *argp = rqstp->rq_argp;
597 struct nfsd3_pathconfres *resp = rqstp->rq_resp;
598 __be32 nfserr;
599
600 dprintk("nfsd: PATHCONF(3) %s\n",
601 SVCFH_fmt(&argp->fh));
602
603 /* Set default pathconf */
604 resp->p_link_max = 255; /* at least */
605 resp->p_name_max = 255; /* at least */
606 resp->p_no_trunc = 0;
607 resp->p_chown_restricted = 1;
608 resp->p_case_insensitive = 0;
609 resp->p_case_preserving = 1;
610
611 nfserr = fh_verify(rqstp, &argp->fh, 0, NFSD_MAY_NOP);
612
613 if (nfserr == 0) {
614 struct super_block *sb = argp->fh.fh_dentry->d_sb;
615
616 /* Note that we don't care for remote fs's here */
617 switch (sb->s_magic) {
618 case EXT2_SUPER_MAGIC:
619 resp->p_link_max = EXT2_LINK_MAX;
620 resp->p_name_max = EXT2_NAME_LEN;
621 break;
622 case MSDOS_SUPER_MAGIC:
623 resp->p_case_insensitive = 1;
624 resp->p_case_preserving = 0;
625 break;
626 }
627 }
628
629 fh_put(&argp->fh);
630 RETURN_STATUS(nfserr);
631 }
632
633
634 /*
635 * Commit a file (range) to stable storage.
636 */
637 static __be32
638 nfsd3_proc_commit(struct svc_rqst *rqstp)
639 {
640 struct nfsd3_commitargs *argp = rqstp->rq_argp;
641 struct nfsd3_commitres *resp = rqstp->rq_resp;
642 __be32 nfserr;
643
644 dprintk("nfsd: COMMIT(3) %s %u@%Lu\n",
645 SVCFH_fmt(&argp->fh),
646 argp->count,
647 (unsigned long long) argp->offset);
648
649 if (argp->offset > NFS_OFFSET_MAX)
650 RETURN_STATUS(nfserr_inval);
651
652 fh_copy(&resp->fh, &argp->fh);
653 nfserr = nfsd_commit(rqstp, &resp->fh, argp->offset, argp->count);
654
655 RETURN_STATUS(nfserr);
656 }
657
658
659 /*
660 * NFSv3 Server procedures.
661 * Only the results of non-idempotent operations are cached.
662 */
663 #define nfs3svc_decode_fhandleargs nfs3svc_decode_fhandle
664 #define nfs3svc_encode_attrstatres nfs3svc_encode_attrstat
665 #define nfs3svc_encode_wccstatres nfs3svc_encode_wccstat
666 #define nfsd3_mkdirargs nfsd3_createargs
667 #define nfsd3_readdirplusargs nfsd3_readdirargs
668 #define nfsd3_fhandleargs nfsd_fhandle
669 #define nfsd3_fhandleres nfsd3_attrstat
670 #define nfsd3_attrstatres nfsd3_attrstat
671 #define nfsd3_wccstatres nfsd3_attrstat
672 #define nfsd3_createres nfsd3_diropres
673 #define nfsd3_voidres nfsd3_voidargs
674 struct nfsd3_voidargs { int dummy; };
675
676 #define ST 1 /* status*/
677 #define FH 17 /* filehandle with length */
678 #define AT 21 /* attributes */
679 #define pAT (1+AT) /* post attributes - conditional */
680 #define WC (7+pAT) /* WCC attributes */
681
682 static const struct svc_procedure nfsd_procedures3[22] = {
683 [NFS3PROC_NULL] = {
684 .pc_func = nfsd3_proc_null,
685 .pc_encode = nfs3svc_encode_voidres,
686 .pc_argsize = sizeof(struct nfsd3_voidargs),
687 .pc_ressize = sizeof(struct nfsd3_voidres),
688 .pc_cachetype = RC_NOCACHE,
689 .pc_xdrressize = ST,
690 },
691 [NFS3PROC_GETATTR] = {
692 .pc_func = nfsd3_proc_getattr,
693 .pc_decode = nfs3svc_decode_fhandleargs,
694 .pc_encode = nfs3svc_encode_attrstatres,
695 .pc_release = nfs3svc_release_fhandle,
696 .pc_argsize = sizeof(struct nfsd3_fhandleargs),
697 .pc_ressize = sizeof(struct nfsd3_attrstatres),
698 .pc_cachetype = RC_NOCACHE,
699 .pc_xdrressize = ST+AT,
700 },
701 [NFS3PROC_SETATTR] = {
702 .pc_func = nfsd3_proc_setattr,
703 .pc_decode = nfs3svc_decode_sattrargs,
704 .pc_encode = nfs3svc_encode_wccstatres,
705 .pc_release = nfs3svc_release_fhandle,
706 .pc_argsize = sizeof(struct nfsd3_sattrargs),
707 .pc_ressize = sizeof(struct nfsd3_wccstatres),
708 .pc_cachetype = RC_REPLBUFF,
709 .pc_xdrressize = ST+WC,
710 },
711 [NFS3PROC_LOOKUP] = {
712 .pc_func = nfsd3_proc_lookup,
713 .pc_decode = nfs3svc_decode_diropargs,
714 .pc_encode = nfs3svc_encode_diropres,
715 .pc_release = nfs3svc_release_fhandle2,
716 .pc_argsize = sizeof(struct nfsd3_diropargs),
717 .pc_ressize = sizeof(struct nfsd3_diropres),
718 .pc_cachetype = RC_NOCACHE,
719 .pc_xdrressize = ST+FH+pAT+pAT,
720 },
721 [NFS3PROC_ACCESS] = {
722 .pc_func = nfsd3_proc_access,
723 .pc_decode = nfs3svc_decode_accessargs,
724 .pc_encode = nfs3svc_encode_accessres,
725 .pc_release = nfs3svc_release_fhandle,
726 .pc_argsize = sizeof(struct nfsd3_accessargs),
727 .pc_ressize = sizeof(struct nfsd3_accessres),
728 .pc_cachetype = RC_NOCACHE,
729 .pc_xdrressize = ST+pAT+1,
730 },
731 [NFS3PROC_READLINK] = {
732 .pc_func = nfsd3_proc_readlink,
733 .pc_decode = nfs3svc_decode_readlinkargs,
734 .pc_encode = nfs3svc_encode_readlinkres,
735 .pc_release = nfs3svc_release_fhandle,
736 .pc_argsize = sizeof(struct nfsd3_readlinkargs),
737 .pc_ressize = sizeof(struct nfsd3_readlinkres),
738 .pc_cachetype = RC_NOCACHE,
739 .pc_xdrressize = ST+pAT+1+NFS3_MAXPATHLEN/4,
740 },
741 [NFS3PROC_READ] = {
742 .pc_func = nfsd3_proc_read,
743 .pc_decode = nfs3svc_decode_readargs,
744 .pc_encode = nfs3svc_encode_readres,
745 .pc_release = nfs3svc_release_fhandle,
746 .pc_argsize = sizeof(struct nfsd3_readargs),
747 .pc_ressize = sizeof(struct nfsd3_readres),
748 .pc_cachetype = RC_NOCACHE,
749 .pc_xdrressize = ST+pAT+4+NFSSVC_MAXBLKSIZE/4,
750 },
751 [NFS3PROC_WRITE] = {
752 .pc_func = nfsd3_proc_write,
753 .pc_decode = nfs3svc_decode_writeargs,
754 .pc_encode = nfs3svc_encode_writeres,
755 .pc_release = nfs3svc_release_fhandle,
756 .pc_argsize = sizeof(struct nfsd3_writeargs),
757 .pc_ressize = sizeof(struct nfsd3_writeres),
758 .pc_cachetype = RC_REPLBUFF,
759 .pc_xdrressize = ST+WC+4,
760 },
761 [NFS3PROC_CREATE] = {
762 .pc_func = nfsd3_proc_create,
763 .pc_decode = nfs3svc_decode_createargs,
764 .pc_encode = nfs3svc_encode_createres,
765 .pc_release = nfs3svc_release_fhandle2,
766 .pc_argsize = sizeof(struct nfsd3_createargs),
767 .pc_ressize = sizeof(struct nfsd3_createres),
768 .pc_cachetype = RC_REPLBUFF,
769 .pc_xdrressize = ST+(1+FH+pAT)+WC,
770 },
771 [NFS3PROC_MKDIR] = {
772 .pc_func = nfsd3_proc_mkdir,
773 .pc_decode = nfs3svc_decode_mkdirargs,
774 .pc_encode = nfs3svc_encode_createres,
775 .pc_release = nfs3svc_release_fhandle2,
776 .pc_argsize = sizeof(struct nfsd3_mkdirargs),
777 .pc_ressize = sizeof(struct nfsd3_createres),
778 .pc_cachetype = RC_REPLBUFF,
779 .pc_xdrressize = ST+(1+FH+pAT)+WC,
780 },
781 [NFS3PROC_SYMLINK] = {
782 .pc_func = nfsd3_proc_symlink,
783 .pc_decode = nfs3svc_decode_symlinkargs,
784 .pc_encode = nfs3svc_encode_createres,
785 .pc_release = nfs3svc_release_fhandle2,
786 .pc_argsize = sizeof(struct nfsd3_symlinkargs),
787 .pc_ressize = sizeof(struct nfsd3_createres),
788 .pc_cachetype = RC_REPLBUFF,
789 .pc_xdrressize = ST+(1+FH+pAT)+WC,
790 },
791 [NFS3PROC_MKNOD] = {
792 .pc_func = nfsd3_proc_mknod,
793 .pc_decode = nfs3svc_decode_mknodargs,
794 .pc_encode = nfs3svc_encode_createres,
795 .pc_release = nfs3svc_release_fhandle2,
796 .pc_argsize = sizeof(struct nfsd3_mknodargs),
797 .pc_ressize = sizeof(struct nfsd3_createres),
798 .pc_cachetype = RC_REPLBUFF,
799 .pc_xdrressize = ST+(1+FH+pAT)+WC,
800 },
801 [NFS3PROC_REMOVE] = {
802 .pc_func = nfsd3_proc_remove,
803 .pc_decode = nfs3svc_decode_diropargs,
804 .pc_encode = nfs3svc_encode_wccstatres,
805 .pc_release = nfs3svc_release_fhandle,
806 .pc_argsize = sizeof(struct nfsd3_diropargs),
807 .pc_ressize = sizeof(struct nfsd3_wccstatres),
808 .pc_cachetype = RC_REPLBUFF,
809 .pc_xdrressize = ST+WC,
810 },
811 [NFS3PROC_RMDIR] = {
812 .pc_func = nfsd3_proc_rmdir,
813 .pc_decode = nfs3svc_decode_diropargs,
814 .pc_encode = nfs3svc_encode_wccstatres,
815 .pc_release = nfs3svc_release_fhandle,
816 .pc_argsize = sizeof(struct nfsd3_diropargs),
817 .pc_ressize = sizeof(struct nfsd3_wccstatres),
818 .pc_cachetype = RC_REPLBUFF,
819 .pc_xdrressize = ST+WC,
820 },
821 [NFS3PROC_RENAME] = {
822 .pc_func = nfsd3_proc_rename,
823 .pc_decode = nfs3svc_decode_renameargs,
824 .pc_encode = nfs3svc_encode_renameres,
825 .pc_release = nfs3svc_release_fhandle2,
826 .pc_argsize = sizeof(struct nfsd3_renameargs),
827 .pc_ressize = sizeof(struct nfsd3_renameres),
828 .pc_cachetype = RC_REPLBUFF,
829 .pc_xdrressize = ST+WC+WC,
830 },
831 [NFS3PROC_LINK] = {
832 .pc_func = nfsd3_proc_link,
833 .pc_decode = nfs3svc_decode_linkargs,
834 .pc_encode = nfs3svc_encode_linkres,
835 .pc_release = nfs3svc_release_fhandle2,
836 .pc_argsize = sizeof(struct nfsd3_linkargs),
837 .pc_ressize = sizeof(struct nfsd3_linkres),
838 .pc_cachetype = RC_REPLBUFF,
839 .pc_xdrressize = ST+pAT+WC,
840 },
841 [NFS3PROC_READDIR] = {
842 .pc_func = nfsd3_proc_readdir,
843 .pc_decode = nfs3svc_decode_readdirargs,
844 .pc_encode = nfs3svc_encode_readdirres,
845 .pc_release = nfs3svc_release_fhandle,
846 .pc_argsize = sizeof(struct nfsd3_readdirargs),
847 .pc_ressize = sizeof(struct nfsd3_readdirres),
848 .pc_cachetype = RC_NOCACHE,
849 },
850 [NFS3PROC_READDIRPLUS] = {
851 .pc_func = nfsd3_proc_readdirplus,
852 .pc_decode = nfs3svc_decode_readdirplusargs,
853 .pc_encode = nfs3svc_encode_readdirres,
854 .pc_release = nfs3svc_release_fhandle,
855 .pc_argsize = sizeof(struct nfsd3_readdirplusargs),
856 .pc_ressize = sizeof(struct nfsd3_readdirres),
857 .pc_cachetype = RC_NOCACHE,
858 },
859 [NFS3PROC_FSSTAT] = {
860 .pc_func = nfsd3_proc_fsstat,
861 .pc_decode = nfs3svc_decode_fhandleargs,
862 .pc_encode = nfs3svc_encode_fsstatres,
863 .pc_argsize = sizeof(struct nfsd3_fhandleargs),
864 .pc_ressize = sizeof(struct nfsd3_fsstatres),
865 .pc_cachetype = RC_NOCACHE,
866 .pc_xdrressize = ST+pAT+2*6+1,
867 },
868 [NFS3PROC_FSINFO] = {
869 .pc_func = nfsd3_proc_fsinfo,
870 .pc_decode = nfs3svc_decode_fhandleargs,
871 .pc_encode = nfs3svc_encode_fsinfores,
872 .pc_argsize = sizeof(struct nfsd3_fhandleargs),
873 .pc_ressize = sizeof(struct nfsd3_fsinfores),
874 .pc_cachetype = RC_NOCACHE,
875 .pc_xdrressize = ST+pAT+12,
876 },
877 [NFS3PROC_PATHCONF] = {
878 .pc_func = nfsd3_proc_pathconf,
879 .pc_decode = nfs3svc_decode_fhandleargs,
880 .pc_encode = nfs3svc_encode_pathconfres,
881 .pc_argsize = sizeof(struct nfsd3_fhandleargs),
882 .pc_ressize = sizeof(struct nfsd3_pathconfres),
883 .pc_cachetype = RC_NOCACHE,
884 .pc_xdrressize = ST+pAT+6,
885 },
886 [NFS3PROC_COMMIT] = {
887 .pc_func = nfsd3_proc_commit,
888 .pc_decode = nfs3svc_decode_commitargs,
889 .pc_encode = nfs3svc_encode_commitres,
890 .pc_release = nfs3svc_release_fhandle,
891 .pc_argsize = sizeof(struct nfsd3_commitargs),
892 .pc_ressize = sizeof(struct nfsd3_commitres),
893 .pc_cachetype = RC_NOCACHE,
894 .pc_xdrressize = ST+WC+2,
895 },
896 };
897
898 static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures3)];
899 const struct svc_version nfsd_version3 = {
900 .vs_vers = 3,
901 .vs_nproc = 22,
902 .vs_proc = nfsd_procedures3,
903 .vs_dispatch = nfsd_dispatch,
904 .vs_count = nfsd_count3,
905 .vs_xdrsize = NFS3_SVC_XDRSIZE,
906 };
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