]> git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/blob - fs/nfsd/nfs3proc.c
projects / mirror_ubuntu-eoan-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge branch 'userns-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm...
[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 if (argp->tlen == 0)
287 RETURN_STATUS(nfserr_inval);
288 if (argp->tlen > NFS3_MAXPATHLEN)
289 RETURN_STATUS(nfserr_nametoolong);
290
291 argp->tname = svc_fill_symlink_pathname(rqstp, &argp->first,
292 argp->tlen);
293 if (IS_ERR(argp->tname))
294 RETURN_STATUS(nfserrno(PTR_ERR(argp->tname)));
295
296 dprintk("nfsd: SYMLINK(3) %s %.*s -> %.*s\n",
297 SVCFH_fmt(&argp->ffh),
298 argp->flen, argp->fname,
299 argp->tlen, argp->tname);
300
301 fh_copy(&resp->dirfh, &argp->ffh);
302 fh_init(&resp->fh, NFS3_FHSIZE);
303 nfserr = nfsd_symlink(rqstp, &resp->dirfh, argp->fname, argp->flen,
304 argp->tname, &resp->fh);
305 RETURN_STATUS(nfserr);
306 }
307
308 /*
309 * Make socket/fifo/device.
310 */
311 static __be32
312 nfsd3_proc_mknod(struct svc_rqst *rqstp)
313 {
314 struct nfsd3_mknodargs *argp = rqstp->rq_argp;
315 struct nfsd3_diropres *resp = rqstp->rq_resp;
316 __be32 nfserr;
317 int type;
318 dev_t rdev = 0;
319
320 dprintk("nfsd: MKNOD(3) %s %.*s\n",
321 SVCFH_fmt(&argp->fh),
322 argp->len,
323 argp->name);
324
325 fh_copy(&resp->dirfh, &argp->fh);
326 fh_init(&resp->fh, NFS3_FHSIZE);
327
328 if (argp->ftype == 0 || argp->ftype >= NF3BAD)
329 RETURN_STATUS(nfserr_inval);
330 if (argp->ftype == NF3CHR || argp->ftype == NF3BLK) {
331 rdev = MKDEV(argp->major, argp->minor);
332 if (MAJOR(rdev) != argp->major ||
333 MINOR(rdev) != argp->minor)
334 RETURN_STATUS(nfserr_inval);
335 } else
336 if (argp->ftype != NF3SOCK && argp->ftype != NF3FIFO)
337 RETURN_STATUS(nfserr_inval);
338
339 type = nfs3_ftypes[argp->ftype];
340 nfserr = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len,
341 &argp->attrs, type, rdev, &resp->fh);
342 fh_unlock(&resp->dirfh);
343 RETURN_STATUS(nfserr);
344 }
345
346 /*
347 * Remove file/fifo/socket etc.
348 */
349 static __be32
350 nfsd3_proc_remove(struct svc_rqst *rqstp)
351 {
352 struct nfsd3_diropargs *argp = rqstp->rq_argp;
353 struct nfsd3_attrstat *resp = rqstp->rq_resp;
354 __be32 nfserr;
355
356 dprintk("nfsd: REMOVE(3) %s %.*s\n",
357 SVCFH_fmt(&argp->fh),
358 argp->len,
359 argp->name);
360
361 /* Unlink. -S_IFDIR means file must not be a directory */
362 fh_copy(&resp->fh, &argp->fh);
363 nfserr = nfsd_unlink(rqstp, &resp->fh, -S_IFDIR, argp->name, argp->len);
364 fh_unlock(&resp->fh);
365 RETURN_STATUS(nfserr);
366 }
367
368 /*
369 * Remove a directory
370 */
371 static __be32
372 nfsd3_proc_rmdir(struct svc_rqst *rqstp)
373 {
374 struct nfsd3_diropargs *argp = rqstp->rq_argp;
375 struct nfsd3_attrstat *resp = rqstp->rq_resp;
376 __be32 nfserr;
377
378 dprintk("nfsd: RMDIR(3) %s %.*s\n",
379 SVCFH_fmt(&argp->fh),
380 argp->len,
381 argp->name);
382
383 fh_copy(&resp->fh, &argp->fh);
384 nfserr = nfsd_unlink(rqstp, &resp->fh, S_IFDIR, argp->name, argp->len);
385 fh_unlock(&resp->fh);
386 RETURN_STATUS(nfserr);
387 }
388
389 static __be32
390 nfsd3_proc_rename(struct svc_rqst *rqstp)
391 {
392 struct nfsd3_renameargs *argp = rqstp->rq_argp;
393 struct nfsd3_renameres *resp = rqstp->rq_resp;
394 __be32 nfserr;
395
396 dprintk("nfsd: RENAME(3) %s %.*s ->\n",
397 SVCFH_fmt(&argp->ffh),
398 argp->flen,
399 argp->fname);
400 dprintk("nfsd: -> %s %.*s\n",
401 SVCFH_fmt(&argp->tfh),
402 argp->tlen,
403 argp->tname);
404
405 fh_copy(&resp->ffh, &argp->ffh);
406 fh_copy(&resp->tfh, &argp->tfh);
407 nfserr = nfsd_rename(rqstp, &resp->ffh, argp->fname, argp->flen,
408 &resp->tfh, argp->tname, argp->tlen);
409 RETURN_STATUS(nfserr);
410 }
411
412 static __be32
413 nfsd3_proc_link(struct svc_rqst *rqstp)
414 {
415 struct nfsd3_linkargs *argp = rqstp->rq_argp;
416 struct nfsd3_linkres *resp = rqstp->rq_resp;
417 __be32 nfserr;
418
419 dprintk("nfsd: LINK(3) %s ->\n",
420 SVCFH_fmt(&argp->ffh));
421 dprintk("nfsd: -> %s %.*s\n",
422 SVCFH_fmt(&argp->tfh),
423 argp->tlen,
424 argp->tname);
425
426 fh_copy(&resp->fh, &argp->ffh);
427 fh_copy(&resp->tfh, &argp->tfh);
428 nfserr = nfsd_link(rqstp, &resp->tfh, argp->tname, argp->tlen,
429 &resp->fh);
430 RETURN_STATUS(nfserr);
431 }
432
433 /*
434 * Read a portion of a directory.
435 */
436 static __be32
437 nfsd3_proc_readdir(struct svc_rqst *rqstp)
438 {
439 struct nfsd3_readdirargs *argp = rqstp->rq_argp;
440 struct nfsd3_readdirres *resp = rqstp->rq_resp;
441 __be32 nfserr;
442 int count;
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 resp->count = resp->buffer - argp->buffer;
463 if (resp->offset)
464 xdr_encode_hyper(resp->offset, argp->cookie);
465
466 RETURN_STATUS(nfserr);
467 }
468
469 /*
470 * Read a portion of a directory, including file handles and attrs.
471 * For now, we choose to ignore the dircount parameter.
472 */
473 static __be32
474 nfsd3_proc_readdirplus(struct svc_rqst *rqstp)
475 {
476 struct nfsd3_readdirargs *argp = rqstp->rq_argp;
477 struct nfsd3_readdirres *resp = rqstp->rq_resp;
478 __be32 nfserr;
479 int count = 0;
480 loff_t offset;
481 struct page **p;
482 caddr_t page_addr = NULL;
483
484 dprintk("nfsd: READDIR+(3) %s %d bytes at %d\n",
485 SVCFH_fmt(&argp->fh),
486 argp->count, (u32) argp->cookie);
487
488 /* Convert byte count to number of words (i.e. >> 2),
489 * and reserve room for the NULL ptr & eof flag (-2 words) */
490 resp->count = (argp->count >> 2) - 2;
491
492 /* Read directory and encode entries on the fly */
493 fh_copy(&resp->fh, &argp->fh);
494
495 resp->common.err = nfs_ok;
496 resp->buffer = argp->buffer;
497 resp->buflen = resp->count;
498 resp->rqstp = rqstp;
499 offset = argp->cookie;
500
501 nfserr = fh_verify(rqstp, &resp->fh, S_IFDIR, NFSD_MAY_NOP);
502 if (nfserr)
503 RETURN_STATUS(nfserr);
504
505 if (resp->fh.fh_export->ex_flags & NFSEXP_NOREADDIRPLUS)
506 RETURN_STATUS(nfserr_notsupp);
507
508 nfserr = nfsd_readdir(rqstp, &resp->fh,
509 &offset,
510 &resp->common,
511 nfs3svc_encode_entry_plus);
512 memcpy(resp->verf, argp->verf, 8);
513 for (p = rqstp->rq_respages + 1; p < rqstp->rq_next_page; p++) {
514 page_addr = page_address(*p);
515
516 if (((caddr_t)resp->buffer >= page_addr) &&
517 ((caddr_t)resp->buffer < page_addr + PAGE_SIZE)) {
518 count += (caddr_t)resp->buffer - page_addr;
519 break;
520 }
521 count += PAGE_SIZE;
522 }
523 resp->count = count >> 2;
524 if (resp->offset) {
525 if (unlikely(resp->offset1)) {
526 /* we ended up with offset on a page boundary */
527 *resp->offset = htonl(offset >> 32);
528 *resp->offset1 = htonl(offset & 0xffffffff);
529 resp->offset1 = NULL;
530 } else {
531 xdr_encode_hyper(resp->offset, offset);
532 }
533 }
534
535 RETURN_STATUS(nfserr);
536 }
537
538 /*
539 * Get file system stats
540 */
541 static __be32
542 nfsd3_proc_fsstat(struct svc_rqst *rqstp)
543 {
544 struct nfsd_fhandle *argp = rqstp->rq_argp;
545 struct nfsd3_fsstatres *resp = rqstp->rq_resp;
546 __be32 nfserr;
547
548 dprintk("nfsd: FSSTAT(3) %s\n",
549 SVCFH_fmt(&argp->fh));
550
551 nfserr = nfsd_statfs(rqstp, &argp->fh, &resp->stats, 0);
552 fh_put(&argp->fh);
553 RETURN_STATUS(nfserr);
554 }
555
556 /*
557 * Get file system info
558 */
559 static __be32
560 nfsd3_proc_fsinfo(struct svc_rqst *rqstp)
561 {
562 struct nfsd_fhandle *argp = rqstp->rq_argp;
563 struct nfsd3_fsinfores *resp = rqstp->rq_resp;
564 __be32 nfserr;
565 u32 max_blocksize = svc_max_payload(rqstp);
566
567 dprintk("nfsd: FSINFO(3) %s\n",
568 SVCFH_fmt(&argp->fh));
569
570 resp->f_rtmax = max_blocksize;
571 resp->f_rtpref = max_blocksize;
572 resp->f_rtmult = PAGE_SIZE;
573 resp->f_wtmax = max_blocksize;
574 resp->f_wtpref = max_blocksize;
575 resp->f_wtmult = PAGE_SIZE;
576 resp->f_dtpref = PAGE_SIZE;
577 resp->f_maxfilesize = ~(u32) 0;
578 resp->f_properties = NFS3_FSF_DEFAULT;
579
580 nfserr = fh_verify(rqstp, &argp->fh, 0,
581 NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT);
582
583 /* Check special features of the file system. May request
584 * different read/write sizes for file systems known to have
585 * problems with large blocks */
586 if (nfserr == 0) {
587 struct super_block *sb = argp->fh.fh_dentry->d_sb;
588
589 /* Note that we don't care for remote fs's here */
590 if (sb->s_magic == MSDOS_SUPER_MAGIC) {
591 resp->f_properties = NFS3_FSF_BILLYBOY;
592 }
593 resp->f_maxfilesize = sb->s_maxbytes;
594 }
595
596 fh_put(&argp->fh);
597 RETURN_STATUS(nfserr);
598 }
599
600 /*
601 * Get pathconf info for the specified file
602 */
603 static __be32
604 nfsd3_proc_pathconf(struct svc_rqst *rqstp)
605 {
606 struct nfsd_fhandle *argp = rqstp->rq_argp;
607 struct nfsd3_pathconfres *resp = rqstp->rq_resp;
608 __be32 nfserr;
609
610 dprintk("nfsd: PATHCONF(3) %s\n",
611 SVCFH_fmt(&argp->fh));
612
613 /* Set default pathconf */
614 resp->p_link_max = 255; /* at least */
615 resp->p_name_max = 255; /* at least */
616 resp->p_no_trunc = 0;
617 resp->p_chown_restricted = 1;
618 resp->p_case_insensitive = 0;
619 resp->p_case_preserving = 1;
620
621 nfserr = fh_verify(rqstp, &argp->fh, 0, NFSD_MAY_NOP);
622
623 if (nfserr == 0) {
624 struct super_block *sb = argp->fh.fh_dentry->d_sb;
625
626 /* Note that we don't care for remote fs's here */
627 switch (sb->s_magic) {
628 case EXT2_SUPER_MAGIC:
629 resp->p_link_max = EXT2_LINK_MAX;
630 resp->p_name_max = EXT2_NAME_LEN;
631 break;
632 case MSDOS_SUPER_MAGIC:
633 resp->p_case_insensitive = 1;
634 resp->p_case_preserving = 0;
635 break;
636 }
637 }
638
639 fh_put(&argp->fh);
640 RETURN_STATUS(nfserr);
641 }
642
643
644 /*
645 * Commit a file (range) to stable storage.
646 */
647 static __be32
648 nfsd3_proc_commit(struct svc_rqst *rqstp)
649 {
650 struct nfsd3_commitargs *argp = rqstp->rq_argp;
651 struct nfsd3_commitres *resp = rqstp->rq_resp;
652 __be32 nfserr;
653
654 dprintk("nfsd: COMMIT(3) %s %u@%Lu\n",
655 SVCFH_fmt(&argp->fh),
656 argp->count,
657 (unsigned long long) argp->offset);
658
659 if (argp->offset > NFS_OFFSET_MAX)
660 RETURN_STATUS(nfserr_inval);
661
662 fh_copy(&resp->fh, &argp->fh);
663 nfserr = nfsd_commit(rqstp, &resp->fh, argp->offset, argp->count);
664
665 RETURN_STATUS(nfserr);
666 }
667
668
669 /*
670 * NFSv3 Server procedures.
671 * Only the results of non-idempotent operations are cached.
672 */
673 #define nfs3svc_decode_fhandleargs nfs3svc_decode_fhandle
674 #define nfs3svc_encode_attrstatres nfs3svc_encode_attrstat
675 #define nfs3svc_encode_wccstatres nfs3svc_encode_wccstat
676 #define nfsd3_mkdirargs nfsd3_createargs
677 #define nfsd3_readdirplusargs nfsd3_readdirargs
678 #define nfsd3_fhandleargs nfsd_fhandle
679 #define nfsd3_fhandleres nfsd3_attrstat
680 #define nfsd3_attrstatres nfsd3_attrstat
681 #define nfsd3_wccstatres nfsd3_attrstat
682 #define nfsd3_createres nfsd3_diropres
683 #define nfsd3_voidres nfsd3_voidargs
684 struct nfsd3_voidargs { int dummy; };
685
686 #define ST 1 /* status*/
687 #define FH 17 /* filehandle with length */
688 #define AT 21 /* attributes */
689 #define pAT (1+AT) /* post attributes - conditional */
690 #define WC (7+pAT) /* WCC attributes */
691
692 static const struct svc_procedure nfsd_procedures3[22] = {
693 [NFS3PROC_NULL] = {
694 .pc_func = nfsd3_proc_null,
695 .pc_encode = nfs3svc_encode_voidres,
696 .pc_argsize = sizeof(struct nfsd3_voidargs),
697 .pc_ressize = sizeof(struct nfsd3_voidres),
698 .pc_cachetype = RC_NOCACHE,
699 .pc_xdrressize = ST,
700 },
701 [NFS3PROC_GETATTR] = {
702 .pc_func = nfsd3_proc_getattr,
703 .pc_decode = nfs3svc_decode_fhandleargs,
704 .pc_encode = nfs3svc_encode_attrstatres,
705 .pc_release = nfs3svc_release_fhandle,
706 .pc_argsize = sizeof(struct nfsd3_fhandleargs),
707 .pc_ressize = sizeof(struct nfsd3_attrstatres),
708 .pc_cachetype = RC_NOCACHE,
709 .pc_xdrressize = ST+AT,
710 },
711 [NFS3PROC_SETATTR] = {
712 .pc_func = nfsd3_proc_setattr,
713 .pc_decode = nfs3svc_decode_sattrargs,
714 .pc_encode = nfs3svc_encode_wccstatres,
715 .pc_release = nfs3svc_release_fhandle,
716 .pc_argsize = sizeof(struct nfsd3_sattrargs),
717 .pc_ressize = sizeof(struct nfsd3_wccstatres),
718 .pc_cachetype = RC_REPLBUFF,
719 .pc_xdrressize = ST+WC,
720 },
721 [NFS3PROC_LOOKUP] = {
722 .pc_func = nfsd3_proc_lookup,
723 .pc_decode = nfs3svc_decode_diropargs,
724 .pc_encode = nfs3svc_encode_diropres,
725 .pc_release = nfs3svc_release_fhandle2,
726 .pc_argsize = sizeof(struct nfsd3_diropargs),
727 .pc_ressize = sizeof(struct nfsd3_diropres),
728 .pc_cachetype = RC_NOCACHE,
729 .pc_xdrressize = ST+FH+pAT+pAT,
730 },
731 [NFS3PROC_ACCESS] = {
732 .pc_func = nfsd3_proc_access,
733 .pc_decode = nfs3svc_decode_accessargs,
734 .pc_encode = nfs3svc_encode_accessres,
735 .pc_release = nfs3svc_release_fhandle,
736 .pc_argsize = sizeof(struct nfsd3_accessargs),
737 .pc_ressize = sizeof(struct nfsd3_accessres),
738 .pc_cachetype = RC_NOCACHE,
739 .pc_xdrressize = ST+pAT+1,
740 },
741 [NFS3PROC_READLINK] = {
742 .pc_func = nfsd3_proc_readlink,
743 .pc_decode = nfs3svc_decode_readlinkargs,
744 .pc_encode = nfs3svc_encode_readlinkres,
745 .pc_release = nfs3svc_release_fhandle,
746 .pc_argsize = sizeof(struct nfsd3_readlinkargs),
747 .pc_ressize = sizeof(struct nfsd3_readlinkres),
748 .pc_cachetype = RC_NOCACHE,
749 .pc_xdrressize = ST+pAT+1+NFS3_MAXPATHLEN/4,
750 },
751 [NFS3PROC_READ] = {
752 .pc_func = nfsd3_proc_read,
753 .pc_decode = nfs3svc_decode_readargs,
754 .pc_encode = nfs3svc_encode_readres,
755 .pc_release = nfs3svc_release_fhandle,
756 .pc_argsize = sizeof(struct nfsd3_readargs),
757 .pc_ressize = sizeof(struct nfsd3_readres),
758 .pc_cachetype = RC_NOCACHE,
759 .pc_xdrressize = ST+pAT+4+NFSSVC_MAXBLKSIZE/4,
760 },
761 [NFS3PROC_WRITE] = {
762 .pc_func = nfsd3_proc_write,
763 .pc_decode = nfs3svc_decode_writeargs,
764 .pc_encode = nfs3svc_encode_writeres,
765 .pc_release = nfs3svc_release_fhandle,
766 .pc_argsize = sizeof(struct nfsd3_writeargs),
767 .pc_ressize = sizeof(struct nfsd3_writeres),
768 .pc_cachetype = RC_REPLBUFF,
769 .pc_xdrressize = ST+WC+4,
770 },
771 [NFS3PROC_CREATE] = {
772 .pc_func = nfsd3_proc_create,
773 .pc_decode = nfs3svc_decode_createargs,
774 .pc_encode = nfs3svc_encode_createres,
775 .pc_release = nfs3svc_release_fhandle2,
776 .pc_argsize = sizeof(struct nfsd3_createargs),
777 .pc_ressize = sizeof(struct nfsd3_createres),
778 .pc_cachetype = RC_REPLBUFF,
779 .pc_xdrressize = ST+(1+FH+pAT)+WC,
780 },
781 [NFS3PROC_MKDIR] = {
782 .pc_func = nfsd3_proc_mkdir,
783 .pc_decode = nfs3svc_decode_mkdirargs,
784 .pc_encode = nfs3svc_encode_createres,
785 .pc_release = nfs3svc_release_fhandle2,
786 .pc_argsize = sizeof(struct nfsd3_mkdirargs),
787 .pc_ressize = sizeof(struct nfsd3_createres),
788 .pc_cachetype = RC_REPLBUFF,
789 .pc_xdrressize = ST+(1+FH+pAT)+WC,
790 },
791 [NFS3PROC_SYMLINK] = {
792 .pc_func = nfsd3_proc_symlink,
793 .pc_decode = nfs3svc_decode_symlinkargs,
794 .pc_encode = nfs3svc_encode_createres,
795 .pc_release = nfs3svc_release_fhandle2,
796 .pc_argsize = sizeof(struct nfsd3_symlinkargs),
797 .pc_ressize = sizeof(struct nfsd3_createres),
798 .pc_cachetype = RC_REPLBUFF,
799 .pc_xdrressize = ST+(1+FH+pAT)+WC,
800 },
801 [NFS3PROC_MKNOD] = {
802 .pc_func = nfsd3_proc_mknod,
803 .pc_decode = nfs3svc_decode_mknodargs,
804 .pc_encode = nfs3svc_encode_createres,
805 .pc_release = nfs3svc_release_fhandle2,
806 .pc_argsize = sizeof(struct nfsd3_mknodargs),
807 .pc_ressize = sizeof(struct nfsd3_createres),
808 .pc_cachetype = RC_REPLBUFF,
809 .pc_xdrressize = ST+(1+FH+pAT)+WC,
810 },
811 [NFS3PROC_REMOVE] = {
812 .pc_func = nfsd3_proc_remove,
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_RMDIR] = {
822 .pc_func = nfsd3_proc_rmdir,
823 .pc_decode = nfs3svc_decode_diropargs,
824 .pc_encode = nfs3svc_encode_wccstatres,
825 .pc_release = nfs3svc_release_fhandle,
826 .pc_argsize = sizeof(struct nfsd3_diropargs),
827 .pc_ressize = sizeof(struct nfsd3_wccstatres),
828 .pc_cachetype = RC_REPLBUFF,
829 .pc_xdrressize = ST+WC,
830 },
831 [NFS3PROC_RENAME] = {
832 .pc_func = nfsd3_proc_rename,
833 .pc_decode = nfs3svc_decode_renameargs,
834 .pc_encode = nfs3svc_encode_renameres,
835 .pc_release = nfs3svc_release_fhandle2,
836 .pc_argsize = sizeof(struct nfsd3_renameargs),
837 .pc_ressize = sizeof(struct nfsd3_renameres),
838 .pc_cachetype = RC_REPLBUFF,
839 .pc_xdrressize = ST+WC+WC,
840 },
841 [NFS3PROC_LINK] = {
842 .pc_func = nfsd3_proc_link,
843 .pc_decode = nfs3svc_decode_linkargs,
844 .pc_encode = nfs3svc_encode_linkres,
845 .pc_release = nfs3svc_release_fhandle2,
846 .pc_argsize = sizeof(struct nfsd3_linkargs),
847 .pc_ressize = sizeof(struct nfsd3_linkres),
848 .pc_cachetype = RC_REPLBUFF,
849 .pc_xdrressize = ST+pAT+WC,
850 },
851 [NFS3PROC_READDIR] = {
852 .pc_func = nfsd3_proc_readdir,
853 .pc_decode = nfs3svc_decode_readdirargs,
854 .pc_encode = nfs3svc_encode_readdirres,
855 .pc_release = nfs3svc_release_fhandle,
856 .pc_argsize = sizeof(struct nfsd3_readdirargs),
857 .pc_ressize = sizeof(struct nfsd3_readdirres),
858 .pc_cachetype = RC_NOCACHE,
859 },
860 [NFS3PROC_READDIRPLUS] = {
861 .pc_func = nfsd3_proc_readdirplus,
862 .pc_decode = nfs3svc_decode_readdirplusargs,
863 .pc_encode = nfs3svc_encode_readdirres,
864 .pc_release = nfs3svc_release_fhandle,
865 .pc_argsize = sizeof(struct nfsd3_readdirplusargs),
866 .pc_ressize = sizeof(struct nfsd3_readdirres),
867 .pc_cachetype = RC_NOCACHE,
868 },
869 [NFS3PROC_FSSTAT] = {
870 .pc_func = nfsd3_proc_fsstat,
871 .pc_decode = nfs3svc_decode_fhandleargs,
872 .pc_encode = nfs3svc_encode_fsstatres,
873 .pc_argsize = sizeof(struct nfsd3_fhandleargs),
874 .pc_ressize = sizeof(struct nfsd3_fsstatres),
875 .pc_cachetype = RC_NOCACHE,
876 .pc_xdrressize = ST+pAT+2*6+1,
877 },
878 [NFS3PROC_FSINFO] = {
879 .pc_func = nfsd3_proc_fsinfo,
880 .pc_decode = nfs3svc_decode_fhandleargs,
881 .pc_encode = nfs3svc_encode_fsinfores,
882 .pc_argsize = sizeof(struct nfsd3_fhandleargs),
883 .pc_ressize = sizeof(struct nfsd3_fsinfores),
884 .pc_cachetype = RC_NOCACHE,
885 .pc_xdrressize = ST+pAT+12,
886 },
887 [NFS3PROC_PATHCONF] = {
888 .pc_func = nfsd3_proc_pathconf,
889 .pc_decode = nfs3svc_decode_fhandleargs,
890 .pc_encode = nfs3svc_encode_pathconfres,
891 .pc_argsize = sizeof(struct nfsd3_fhandleargs),
892 .pc_ressize = sizeof(struct nfsd3_pathconfres),
893 .pc_cachetype = RC_NOCACHE,
894 .pc_xdrressize = ST+pAT+6,
895 },
896 [NFS3PROC_COMMIT] = {
897 .pc_func = nfsd3_proc_commit,
898 .pc_decode = nfs3svc_decode_commitargs,
899 .pc_encode = nfs3svc_encode_commitres,
900 .pc_release = nfs3svc_release_fhandle,
901 .pc_argsize = sizeof(struct nfsd3_commitargs),
902 .pc_ressize = sizeof(struct nfsd3_commitres),
903 .pc_cachetype = RC_NOCACHE,
904 .pc_xdrressize = ST+WC+2,
905 },
906 };
907
908 static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures3)];
909 const struct svc_version nfsd_version3 = {
910 .vs_vers = 3,
911 .vs_nproc = 22,
912 .vs_proc = nfsd_procedures3,
913 .vs_dispatch = nfsd_dispatch,
914 .vs_count = nfsd_count3,
915 .vs_xdrsize = NFS3_SVC_XDRSIZE,
916 };
Ubuntu Eoan Linux kernel mirror