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 static int nfs3_ftypes[] = {
19 0, /* NF3NON */
20 S_IFREG, /* NF3REG */
21 S_IFDIR, /* NF3DIR */
22 S_IFBLK, /* NF3BLK */
23 S_IFCHR, /* NF3CHR */
24 S_IFLNK, /* NF3LNK */
25 S_IFSOCK, /* NF3SOCK */
26 S_IFIFO, /* NF3FIFO */
27 };
28
29 /*
30 * NULL call.
31 */
32 static __be32
nfsd3_proc_null(struct svc_rqst * rqstp)33 nfsd3_proc_null(struct svc_rqst *rqstp)
34 {
35 return rpc_success;
36 }
37
38 /*
39 * Get a file's attributes
40 */
41 static __be32
nfsd3_proc_getattr(struct svc_rqst * rqstp)42 nfsd3_proc_getattr(struct svc_rqst *rqstp)
43 {
44 struct nfsd_fhandle *argp = rqstp->rq_argp;
45 struct nfsd3_attrstat *resp = rqstp->rq_resp;
46
47 dprintk("nfsd: GETATTR(3) %s\n",
48 SVCFH_fmt(&argp->fh));
49
50 fh_copy(&resp->fh, &argp->fh);
51 resp->status = fh_verify(rqstp, &resp->fh, 0,
52 NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT);
53 if (resp->status != nfs_ok)
54 goto out;
55
56 resp->status = fh_getattr(&resp->fh, &resp->stat);
57 out:
58 return rpc_success;
59 }
60
61 /*
62 * Set a file's attributes
63 */
64 static __be32
nfsd3_proc_setattr(struct svc_rqst * rqstp)65 nfsd3_proc_setattr(struct svc_rqst *rqstp)
66 {
67 struct nfsd3_sattrargs *argp = rqstp->rq_argp;
68 struct nfsd3_attrstat *resp = rqstp->rq_resp;
69
70 dprintk("nfsd: SETATTR(3) %s\n",
71 SVCFH_fmt(&argp->fh));
72
73 fh_copy(&resp->fh, &argp->fh);
74 resp->status = nfsd_setattr(rqstp, &resp->fh, &argp->attrs,
75 argp->check_guard, argp->guardtime);
76 return rpc_success;
77 }
78
79 /*
80 * Look up a path name component
81 */
82 static __be32
nfsd3_proc_lookup(struct svc_rqst * rqstp)83 nfsd3_proc_lookup(struct svc_rqst *rqstp)
84 {
85 struct nfsd3_diropargs *argp = rqstp->rq_argp;
86 struct nfsd3_diropres *resp = rqstp->rq_resp;
87
88 dprintk("nfsd: LOOKUP(3) %s %.*s\n",
89 SVCFH_fmt(&argp->fh),
90 argp->len,
91 argp->name);
92
93 fh_copy(&resp->dirfh, &argp->fh);
94 fh_init(&resp->fh, NFS3_FHSIZE);
95
96 resp->status = nfsd_lookup(rqstp, &resp->dirfh,
97 argp->name, argp->len,
98 &resp->fh);
99 return rpc_success;
100 }
101
102 /*
103 * Check file access
104 */
105 static __be32
nfsd3_proc_access(struct svc_rqst * rqstp)106 nfsd3_proc_access(struct svc_rqst *rqstp)
107 {
108 struct nfsd3_accessargs *argp = rqstp->rq_argp;
109 struct nfsd3_accessres *resp = rqstp->rq_resp;
110
111 dprintk("nfsd: ACCESS(3) %s 0x%x\n",
112 SVCFH_fmt(&argp->fh),
113 argp->access);
114
115 fh_copy(&resp->fh, &argp->fh);
116 resp->access = argp->access;
117 resp->status = nfsd_access(rqstp, &resp->fh, &resp->access, NULL);
118 return rpc_success;
119 }
120
121 /*
122 * Read a symlink.
123 */
124 static __be32
nfsd3_proc_readlink(struct svc_rqst * rqstp)125 nfsd3_proc_readlink(struct svc_rqst *rqstp)
126 {
127 struct nfsd_fhandle *argp = rqstp->rq_argp;
128 struct nfsd3_readlinkres *resp = rqstp->rq_resp;
129
130 dprintk("nfsd: READLINK(3) %s\n", SVCFH_fmt(&argp->fh));
131
132 /* Read the symlink. */
133 fh_copy(&resp->fh, &argp->fh);
134 resp->len = NFS3_MAXPATHLEN;
135 resp->pages = rqstp->rq_next_page++;
136 resp->status = nfsd_readlink(rqstp, &resp->fh,
137 page_address(*resp->pages), &resp->len);
138 return rpc_success;
139 }
140
141 /*
142 * Read a portion of a file.
143 */
144 static __be32
nfsd3_proc_read(struct svc_rqst * rqstp)145 nfsd3_proc_read(struct svc_rqst *rqstp)
146 {
147 struct nfsd3_readargs *argp = rqstp->rq_argp;
148 struct nfsd3_readres *resp = rqstp->rq_resp;
149 u32 max_blocksize = svc_max_payload(rqstp);
150 unsigned int len;
151 int v;
152
153 argp->count = min_t(u32, argp->count, max_blocksize);
154
155 dprintk("nfsd: READ(3) %s %lu bytes at %Lu\n",
156 SVCFH_fmt(&argp->fh),
157 (unsigned long) argp->count,
158 (unsigned long long) argp->offset);
159
160 v = 0;
161 len = argp->count;
162 resp->pages = rqstp->rq_next_page;
163 while (len > 0) {
164 struct page *page = *(rqstp->rq_next_page++);
165
166 rqstp->rq_vec[v].iov_base = page_address(page);
167 rqstp->rq_vec[v].iov_len = min_t(unsigned int, len, PAGE_SIZE);
168 len -= rqstp->rq_vec[v].iov_len;
169 v++;
170 }
171
172 /* Obtain buffer pointer for payload.
173 * 1 (status) + 22 (post_op_attr) + 1 (count) + 1 (eof)
174 * + 1 (xdr opaque byte count) = 26
175 */
176 resp->count = argp->count;
177 svc_reserve_auth(rqstp, ((1 + NFS3_POST_OP_ATTR_WORDS + 3)<<2) + resp->count +4);
178
179 fh_copy(&resp->fh, &argp->fh);
180 resp->status = nfsd_read(rqstp, &resp->fh, argp->offset,
181 rqstp->rq_vec, v, &resp->count, &resp->eof);
182 return rpc_success;
183 }
184
185 /*
186 * Write data to a file
187 */
188 static __be32
nfsd3_proc_write(struct svc_rqst * rqstp)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 unsigned long cnt = argp->len;
194 unsigned int nvecs;
195
196 dprintk("nfsd: WRITE(3) %s %d bytes at %Lu%s\n",
197 SVCFH_fmt(&argp->fh),
198 argp->len,
199 (unsigned long long) argp->offset,
200 argp->stable? " stable" : "");
201
202 fh_copy(&resp->fh, &argp->fh);
203 resp->committed = argp->stable;
204 nvecs = svc_fill_write_vector(rqstp, rqstp->rq_arg.pages,
205 &argp->first, cnt);
206 if (!nvecs) {
207 resp->status = nfserr_io;
208 goto out;
209 }
210 resp->status = nfsd_write(rqstp, &resp->fh, argp->offset,
211 rqstp->rq_vec, nvecs, &cnt,
212 resp->committed, resp->verf);
213 resp->count = cnt;
214 out:
215 return rpc_success;
216 }
217
218 /*
219 * With NFSv3, CREATE processing is a lot easier than with NFSv2.
220 * At least in theory; we'll see how it fares in practice when the
221 * first reports about SunOS compatibility problems start to pour in...
222 */
223 static __be32
nfsd3_proc_create(struct svc_rqst * rqstp)224 nfsd3_proc_create(struct svc_rqst *rqstp)
225 {
226 struct nfsd3_createargs *argp = rqstp->rq_argp;
227 struct nfsd3_diropres *resp = rqstp->rq_resp;
228 svc_fh *dirfhp, *newfhp = NULL;
229 struct iattr *attr;
230
231 dprintk("nfsd: CREATE(3) %s %.*s\n",
232 SVCFH_fmt(&argp->fh),
233 argp->len,
234 argp->name);
235
236 dirfhp = fh_copy(&resp->dirfh, &argp->fh);
237 newfhp = fh_init(&resp->fh, NFS3_FHSIZE);
238 attr = &argp->attrs;
239
240 /* Unfudge the mode bits */
241 attr->ia_mode &= ~S_IFMT;
242 if (!(attr->ia_valid & ATTR_MODE)) {
243 attr->ia_valid |= ATTR_MODE;
244 attr->ia_mode = S_IFREG;
245 } else {
246 attr->ia_mode = (attr->ia_mode & ~S_IFMT) | S_IFREG;
247 }
248
249 /* Now create the file and set attributes */
250 resp->status = do_nfsd_create(rqstp, dirfhp, argp->name, argp->len,
251 attr, newfhp, argp->createmode,
252 (u32 *)argp->verf, NULL, NULL);
253 return rpc_success;
254 }
255
256 /*
257 * Make directory. This operation is not idempotent.
258 */
259 static __be32
nfsd3_proc_mkdir(struct svc_rqst * rqstp)260 nfsd3_proc_mkdir(struct svc_rqst *rqstp)
261 {
262 struct nfsd3_createargs *argp = rqstp->rq_argp;
263 struct nfsd3_diropres *resp = rqstp->rq_resp;
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 resp->status = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len,
274 &argp->attrs, S_IFDIR, 0, &resp->fh);
275 fh_unlock(&resp->dirfh);
276 return rpc_success;
277 }
278
279 static __be32
nfsd3_proc_symlink(struct svc_rqst * rqstp)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
285 if (argp->tlen == 0) {
286 resp->status = nfserr_inval;
287 goto out;
288 }
289 if (argp->tlen > NFS3_MAXPATHLEN) {
290 resp->status = nfserr_nametoolong;
291 goto out;
292 }
293
294 argp->tname = svc_fill_symlink_pathname(rqstp, &argp->first,
295 page_address(rqstp->rq_arg.pages[0]),
296 argp->tlen);
297 if (IS_ERR(argp->tname)) {
298 resp->status = nfserrno(PTR_ERR(argp->tname));
299 goto out;
300 }
301
302 dprintk("nfsd: SYMLINK(3) %s %.*s -> %.*s\n",
303 SVCFH_fmt(&argp->ffh),
304 argp->flen, argp->fname,
305 argp->tlen, argp->tname);
306
307 fh_copy(&resp->dirfh, &argp->ffh);
308 fh_init(&resp->fh, NFS3_FHSIZE);
309 resp->status = nfsd_symlink(rqstp, &resp->dirfh, argp->fname,
310 argp->flen, argp->tname, &resp->fh);
311 kfree(argp->tname);
312 out:
313 return rpc_success;
314 }
315
316 /*
317 * Make socket/fifo/device.
318 */
319 static __be32
nfsd3_proc_mknod(struct svc_rqst * rqstp)320 nfsd3_proc_mknod(struct svc_rqst *rqstp)
321 {
322 struct nfsd3_mknodargs *argp = rqstp->rq_argp;
323 struct nfsd3_diropres *resp = rqstp->rq_resp;
324 int type;
325 dev_t rdev = 0;
326
327 dprintk("nfsd: MKNOD(3) %s %.*s\n",
328 SVCFH_fmt(&argp->fh),
329 argp->len,
330 argp->name);
331
332 fh_copy(&resp->dirfh, &argp->fh);
333 fh_init(&resp->fh, NFS3_FHSIZE);
334
335 if (argp->ftype == NF3CHR || argp->ftype == NF3BLK) {
336 rdev = MKDEV(argp->major, argp->minor);
337 if (MAJOR(rdev) != argp->major ||
338 MINOR(rdev) != argp->minor) {
339 resp->status = nfserr_inval;
340 goto out;
341 }
342 } else if (argp->ftype != NF3SOCK && argp->ftype != NF3FIFO) {
343 resp->status = nfserr_badtype;
344 goto out;
345 }
346
347 type = nfs3_ftypes[argp->ftype];
348 resp->status = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len,
349 &argp->attrs, type, rdev, &resp->fh);
350 fh_unlock(&resp->dirfh);
351 out:
352 return rpc_success;
353 }
354
355 /*
356 * Remove file/fifo/socket etc.
357 */
358 static __be32
nfsd3_proc_remove(struct svc_rqst * rqstp)359 nfsd3_proc_remove(struct svc_rqst *rqstp)
360 {
361 struct nfsd3_diropargs *argp = rqstp->rq_argp;
362 struct nfsd3_attrstat *resp = rqstp->rq_resp;
363
364 dprintk("nfsd: REMOVE(3) %s %.*s\n",
365 SVCFH_fmt(&argp->fh),
366 argp->len,
367 argp->name);
368
369 /* Unlink. -S_IFDIR means file must not be a directory */
370 fh_copy(&resp->fh, &argp->fh);
371 resp->status = nfsd_unlink(rqstp, &resp->fh, -S_IFDIR,
372 argp->name, argp->len);
373 fh_unlock(&resp->fh);
374 return rpc_success;
375 }
376
377 /*
378 * Remove a directory
379 */
380 static __be32
nfsd3_proc_rmdir(struct svc_rqst * rqstp)381 nfsd3_proc_rmdir(struct svc_rqst *rqstp)
382 {
383 struct nfsd3_diropargs *argp = rqstp->rq_argp;
384 struct nfsd3_attrstat *resp = rqstp->rq_resp;
385
386 dprintk("nfsd: RMDIR(3) %s %.*s\n",
387 SVCFH_fmt(&argp->fh),
388 argp->len,
389 argp->name);
390
391 fh_copy(&resp->fh, &argp->fh);
392 resp->status = nfsd_unlink(rqstp, &resp->fh, S_IFDIR,
393 argp->name, argp->len);
394 fh_unlock(&resp->fh);
395 return rpc_success;
396 }
397
398 static __be32
nfsd3_proc_rename(struct svc_rqst * rqstp)399 nfsd3_proc_rename(struct svc_rqst *rqstp)
400 {
401 struct nfsd3_renameargs *argp = rqstp->rq_argp;
402 struct nfsd3_renameres *resp = rqstp->rq_resp;
403
404 dprintk("nfsd: RENAME(3) %s %.*s ->\n",
405 SVCFH_fmt(&argp->ffh),
406 argp->flen,
407 argp->fname);
408 dprintk("nfsd: -> %s %.*s\n",
409 SVCFH_fmt(&argp->tfh),
410 argp->tlen,
411 argp->tname);
412
413 fh_copy(&resp->ffh, &argp->ffh);
414 fh_copy(&resp->tfh, &argp->tfh);
415 resp->status = nfsd_rename(rqstp, &resp->ffh, argp->fname, argp->flen,
416 &resp->tfh, argp->tname, argp->tlen);
417 return rpc_success;
418 }
419
420 static __be32
nfsd3_proc_link(struct svc_rqst * rqstp)421 nfsd3_proc_link(struct svc_rqst *rqstp)
422 {
423 struct nfsd3_linkargs *argp = rqstp->rq_argp;
424 struct nfsd3_linkres *resp = rqstp->rq_resp;
425
426 dprintk("nfsd: LINK(3) %s ->\n",
427 SVCFH_fmt(&argp->ffh));
428 dprintk("nfsd: -> %s %.*s\n",
429 SVCFH_fmt(&argp->tfh),
430 argp->tlen,
431 argp->tname);
432
433 fh_copy(&resp->fh, &argp->ffh);
434 fh_copy(&resp->tfh, &argp->tfh);
435 resp->status = nfsd_link(rqstp, &resp->tfh, argp->tname, argp->tlen,
436 &resp->fh);
437 return rpc_success;
438 }
439
nfsd3_init_dirlist_pages(struct svc_rqst * rqstp,struct nfsd3_readdirres * resp,int count)440 static void nfsd3_init_dirlist_pages(struct svc_rqst *rqstp,
441 struct nfsd3_readdirres *resp,
442 int count)
443 {
444 struct xdr_buf *buf = &resp->dirlist;
445 struct xdr_stream *xdr = &resp->xdr;
446
447 count = min_t(u32, count, svc_max_payload(rqstp));
448
449 memset(buf, 0, sizeof(*buf));
450
451 /* Reserve room for the NULL ptr & eof flag (-2 words) */
452 buf->buflen = count - XDR_UNIT * 2;
453 buf->pages = rqstp->rq_next_page;
454 while (count > 0) {
455 rqstp->rq_next_page++;
456 count -= PAGE_SIZE;
457 }
458
459 /* This is xdr_init_encode(), but it assumes that
460 * the head kvec has already been consumed. */
461 xdr_set_scratch_buffer(xdr, NULL, 0);
462 xdr->buf = buf;
463 xdr->page_ptr = buf->pages;
464 xdr->iov = NULL;
465 xdr->p = page_address(*buf->pages);
466 xdr->end = xdr->p + (PAGE_SIZE >> 2);
467 xdr->rqst = NULL;
468 }
469
470 /*
471 * Read a portion of a directory.
472 */
473 static __be32
nfsd3_proc_readdir(struct svc_rqst * rqstp)474 nfsd3_proc_readdir(struct svc_rqst *rqstp)
475 {
476 struct nfsd3_readdirargs *argp = rqstp->rq_argp;
477 struct nfsd3_readdirres *resp = rqstp->rq_resp;
478 loff_t offset;
479
480 dprintk("nfsd: READDIR(3) %s %d bytes at %d\n",
481 SVCFH_fmt(&argp->fh),
482 argp->count, (u32) argp->cookie);
483
484 nfsd3_init_dirlist_pages(rqstp, resp, argp->count);
485
486 fh_copy(&resp->fh, &argp->fh);
487 resp->common.err = nfs_ok;
488 resp->cookie_offset = 0;
489 resp->rqstp = rqstp;
490 offset = argp->cookie;
491 resp->status = nfsd_readdir(rqstp, &resp->fh, &offset,
492 &resp->common, nfs3svc_encode_entry3);
493 memcpy(resp->verf, argp->verf, 8);
494 nfs3svc_encode_cookie3(resp, offset);
495
496 /* Recycle only pages that were part of the reply */
497 rqstp->rq_next_page = resp->xdr.page_ptr + 1;
498
499 return rpc_success;
500 }
501
502 /*
503 * Read a portion of a directory, including file handles and attrs.
504 * For now, we choose to ignore the dircount parameter.
505 */
506 static __be32
nfsd3_proc_readdirplus(struct svc_rqst * rqstp)507 nfsd3_proc_readdirplus(struct svc_rqst *rqstp)
508 {
509 struct nfsd3_readdirargs *argp = rqstp->rq_argp;
510 struct nfsd3_readdirres *resp = rqstp->rq_resp;
511 loff_t offset;
512
513 dprintk("nfsd: READDIR+(3) %s %d bytes at %d\n",
514 SVCFH_fmt(&argp->fh),
515 argp->count, (u32) argp->cookie);
516
517 nfsd3_init_dirlist_pages(rqstp, resp, argp->count);
518
519 fh_copy(&resp->fh, &argp->fh);
520 resp->common.err = nfs_ok;
521 resp->cookie_offset = 0;
522 resp->rqstp = rqstp;
523 offset = argp->cookie;
524
525 resp->status = fh_verify(rqstp, &resp->fh, S_IFDIR, NFSD_MAY_NOP);
526 if (resp->status != nfs_ok)
527 goto out;
528
529 if (resp->fh.fh_export->ex_flags & NFSEXP_NOREADDIRPLUS) {
530 resp->status = nfserr_notsupp;
531 goto out;
532 }
533
534 resp->status = nfsd_readdir(rqstp, &resp->fh, &offset,
535 &resp->common, nfs3svc_encode_entryplus3);
536 memcpy(resp->verf, argp->verf, 8);
537 nfs3svc_encode_cookie3(resp, offset);
538
539 /* Recycle only pages that were part of the reply */
540 rqstp->rq_next_page = resp->xdr.page_ptr + 1;
541
542 out:
543 return rpc_success;
544 }
545
546 /*
547 * Get file system stats
548 */
549 static __be32
nfsd3_proc_fsstat(struct svc_rqst * rqstp)550 nfsd3_proc_fsstat(struct svc_rqst *rqstp)
551 {
552 struct nfsd_fhandle *argp = rqstp->rq_argp;
553 struct nfsd3_fsstatres *resp = rqstp->rq_resp;
554
555 dprintk("nfsd: FSSTAT(3) %s\n",
556 SVCFH_fmt(&argp->fh));
557
558 resp->status = nfsd_statfs(rqstp, &argp->fh, &resp->stats, 0);
559 fh_put(&argp->fh);
560 return rpc_success;
561 }
562
563 /*
564 * Get file system info
565 */
566 static __be32
nfsd3_proc_fsinfo(struct svc_rqst * rqstp)567 nfsd3_proc_fsinfo(struct svc_rqst *rqstp)
568 {
569 struct nfsd_fhandle *argp = rqstp->rq_argp;
570 struct nfsd3_fsinfores *resp = rqstp->rq_resp;
571 u32 max_blocksize = svc_max_payload(rqstp);
572
573 dprintk("nfsd: FSINFO(3) %s\n",
574 SVCFH_fmt(&argp->fh));
575
576 resp->f_rtmax = max_blocksize;
577 resp->f_rtpref = max_blocksize;
578 resp->f_rtmult = PAGE_SIZE;
579 resp->f_wtmax = max_blocksize;
580 resp->f_wtpref = max_blocksize;
581 resp->f_wtmult = PAGE_SIZE;
582 resp->f_dtpref = max_blocksize;
583 resp->f_maxfilesize = ~(u32) 0;
584 resp->f_properties = NFS3_FSF_DEFAULT;
585
586 resp->status = fh_verify(rqstp, &argp->fh, 0,
587 NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT);
588
589 /* Check special features of the file system. May request
590 * different read/write sizes for file systems known to have
591 * problems with large blocks */
592 if (resp->status == nfs_ok) {
593 struct super_block *sb = argp->fh.fh_dentry->d_sb;
594
595 /* Note that we don't care for remote fs's here */
596 if (sb->s_magic == MSDOS_SUPER_MAGIC) {
597 resp->f_properties = NFS3_FSF_BILLYBOY;
598 }
599 resp->f_maxfilesize = sb->s_maxbytes;
600 }
601
602 fh_put(&argp->fh);
603 return rpc_success;
604 }
605
606 /*
607 * Get pathconf info for the specified file
608 */
609 static __be32
nfsd3_proc_pathconf(struct svc_rqst * rqstp)610 nfsd3_proc_pathconf(struct svc_rqst *rqstp)
611 {
612 struct nfsd_fhandle *argp = rqstp->rq_argp;
613 struct nfsd3_pathconfres *resp = rqstp->rq_resp;
614
615 dprintk("nfsd: PATHCONF(3) %s\n",
616 SVCFH_fmt(&argp->fh));
617
618 /* Set default pathconf */
619 resp->p_link_max = 255; /* at least */
620 resp->p_name_max = 255; /* at least */
621 resp->p_no_trunc = 0;
622 resp->p_chown_restricted = 1;
623 resp->p_case_insensitive = 0;
624 resp->p_case_preserving = 1;
625
626 resp->status = fh_verify(rqstp, &argp->fh, 0, NFSD_MAY_NOP);
627
628 if (resp->status == nfs_ok) {
629 struct super_block *sb = argp->fh.fh_dentry->d_sb;
630
631 /* Note that we don't care for remote fs's here */
632 switch (sb->s_magic) {
633 case EXT2_SUPER_MAGIC:
634 resp->p_link_max = EXT2_LINK_MAX;
635 resp->p_name_max = EXT2_NAME_LEN;
636 break;
637 case MSDOS_SUPER_MAGIC:
638 resp->p_case_insensitive = 1;
639 resp->p_case_preserving = 0;
640 break;
641 }
642 }
643
644 fh_put(&argp->fh);
645 return rpc_success;
646 }
647
648 /*
649 * Commit a file (range) to stable storage.
650 */
651 static __be32
nfsd3_proc_commit(struct svc_rqst * rqstp)652 nfsd3_proc_commit(struct svc_rqst *rqstp)
653 {
654 struct nfsd3_commitargs *argp = rqstp->rq_argp;
655 struct nfsd3_commitres *resp = rqstp->rq_resp;
656
657 dprintk("nfsd: COMMIT(3) %s %u@%Lu\n",
658 SVCFH_fmt(&argp->fh),
659 argp->count,
660 (unsigned long long) argp->offset);
661
662 if (argp->offset > NFS_OFFSET_MAX) {
663 resp->status = nfserr_inval;
664 goto out;
665 }
666
667 fh_copy(&resp->fh, &argp->fh);
668 resp->status = nfsd_commit(rqstp, &resp->fh, argp->offset,
669 argp->count, resp->verf);
670 out:
671 return rpc_success;
672 }
673
674
675 /*
676 * NFSv3 Server procedures.
677 * Only the results of non-idempotent operations are cached.
678 */
679 #define nfs3svc_encode_attrstatres nfs3svc_encode_attrstat
680 #define nfs3svc_encode_wccstatres nfs3svc_encode_wccstat
681 #define nfsd3_mkdirargs nfsd3_createargs
682 #define nfsd3_readdirplusargs nfsd3_readdirargs
683 #define nfsd3_fhandleargs nfsd_fhandle
684 #define nfsd3_attrstatres nfsd3_attrstat
685 #define nfsd3_wccstatres nfsd3_attrstat
686 #define nfsd3_createres nfsd3_diropres
687
688 #define ST 1 /* status*/
689 #define FH 17 /* filehandle with length */
690 #define AT 21 /* attributes */
691 #define pAT (1+AT) /* post attributes - conditional */
692 #define WC (7+pAT) /* WCC attributes */
693
694 static const struct svc_procedure nfsd_procedures3[22] = {
695 [NFS3PROC_NULL] = {
696 .pc_func = nfsd3_proc_null,
697 .pc_decode = nfssvc_decode_voidarg,
698 .pc_encode = nfssvc_encode_voidres,
699 .pc_argsize = sizeof(struct nfsd_voidargs),
700 .pc_ressize = sizeof(struct nfsd_voidres),
701 .pc_cachetype = RC_NOCACHE,
702 .pc_xdrressize = ST,
703 .pc_name = "NULL",
704 },
705 [NFS3PROC_GETATTR] = {
706 .pc_func = nfsd3_proc_getattr,
707 .pc_decode = nfs3svc_decode_fhandleargs,
708 .pc_encode = nfs3svc_encode_getattrres,
709 .pc_release = nfs3svc_release_fhandle,
710 .pc_argsize = sizeof(struct nfsd_fhandle),
711 .pc_ressize = sizeof(struct nfsd3_attrstatres),
712 .pc_cachetype = RC_NOCACHE,
713 .pc_xdrressize = ST+AT,
714 .pc_name = "GETATTR",
715 },
716 [NFS3PROC_SETATTR] = {
717 .pc_func = nfsd3_proc_setattr,
718 .pc_decode = nfs3svc_decode_sattrargs,
719 .pc_encode = nfs3svc_encode_wccstatres,
720 .pc_release = nfs3svc_release_fhandle,
721 .pc_argsize = sizeof(struct nfsd3_sattrargs),
722 .pc_ressize = sizeof(struct nfsd3_wccstatres),
723 .pc_cachetype = RC_REPLBUFF,
724 .pc_xdrressize = ST+WC,
725 .pc_name = "SETATTR",
726 },
727 [NFS3PROC_LOOKUP] = {
728 .pc_func = nfsd3_proc_lookup,
729 .pc_decode = nfs3svc_decode_diropargs,
730 .pc_encode = nfs3svc_encode_lookupres,
731 .pc_release = nfs3svc_release_fhandle2,
732 .pc_argsize = sizeof(struct nfsd3_diropargs),
733 .pc_ressize = sizeof(struct nfsd3_diropres),
734 .pc_cachetype = RC_NOCACHE,
735 .pc_xdrressize = ST+FH+pAT+pAT,
736 .pc_name = "LOOKUP",
737 },
738 [NFS3PROC_ACCESS] = {
739 .pc_func = nfsd3_proc_access,
740 .pc_decode = nfs3svc_decode_accessargs,
741 .pc_encode = nfs3svc_encode_accessres,
742 .pc_release = nfs3svc_release_fhandle,
743 .pc_argsize = sizeof(struct nfsd3_accessargs),
744 .pc_ressize = sizeof(struct nfsd3_accessres),
745 .pc_cachetype = RC_NOCACHE,
746 .pc_xdrressize = ST+pAT+1,
747 .pc_name = "ACCESS",
748 },
749 [NFS3PROC_READLINK] = {
750 .pc_func = nfsd3_proc_readlink,
751 .pc_decode = nfs3svc_decode_fhandleargs,
752 .pc_encode = nfs3svc_encode_readlinkres,
753 .pc_release = nfs3svc_release_fhandle,
754 .pc_argsize = sizeof(struct nfsd_fhandle),
755 .pc_ressize = sizeof(struct nfsd3_readlinkres),
756 .pc_cachetype = RC_NOCACHE,
757 .pc_xdrressize = ST+pAT+1+NFS3_MAXPATHLEN/4,
758 .pc_name = "READLINK",
759 },
760 [NFS3PROC_READ] = {
761 .pc_func = nfsd3_proc_read,
762 .pc_decode = nfs3svc_decode_readargs,
763 .pc_encode = nfs3svc_encode_readres,
764 .pc_release = nfs3svc_release_fhandle,
765 .pc_argsize = sizeof(struct nfsd3_readargs),
766 .pc_ressize = sizeof(struct nfsd3_readres),
767 .pc_cachetype = RC_NOCACHE,
768 .pc_xdrressize = ST+pAT+4+NFSSVC_MAXBLKSIZE/4,
769 .pc_name = "READ",
770 },
771 [NFS3PROC_WRITE] = {
772 .pc_func = nfsd3_proc_write,
773 .pc_decode = nfs3svc_decode_writeargs,
774 .pc_encode = nfs3svc_encode_writeres,
775 .pc_release = nfs3svc_release_fhandle,
776 .pc_argsize = sizeof(struct nfsd3_writeargs),
777 .pc_ressize = sizeof(struct nfsd3_writeres),
778 .pc_cachetype = RC_REPLBUFF,
779 .pc_xdrressize = ST+WC+4,
780 .pc_name = "WRITE",
781 },
782 [NFS3PROC_CREATE] = {
783 .pc_func = nfsd3_proc_create,
784 .pc_decode = nfs3svc_decode_createargs,
785 .pc_encode = nfs3svc_encode_createres,
786 .pc_release = nfs3svc_release_fhandle2,
787 .pc_argsize = sizeof(struct nfsd3_createargs),
788 .pc_ressize = sizeof(struct nfsd3_createres),
789 .pc_cachetype = RC_REPLBUFF,
790 .pc_xdrressize = ST+(1+FH+pAT)+WC,
791 .pc_name = "CREATE",
792 },
793 [NFS3PROC_MKDIR] = {
794 .pc_func = nfsd3_proc_mkdir,
795 .pc_decode = nfs3svc_decode_mkdirargs,
796 .pc_encode = nfs3svc_encode_createres,
797 .pc_release = nfs3svc_release_fhandle2,
798 .pc_argsize = sizeof(struct nfsd3_mkdirargs),
799 .pc_ressize = sizeof(struct nfsd3_createres),
800 .pc_cachetype = RC_REPLBUFF,
801 .pc_xdrressize = ST+(1+FH+pAT)+WC,
802 .pc_name = "MKDIR",
803 },
804 [NFS3PROC_SYMLINK] = {
805 .pc_func = nfsd3_proc_symlink,
806 .pc_decode = nfs3svc_decode_symlinkargs,
807 .pc_encode = nfs3svc_encode_createres,
808 .pc_release = nfs3svc_release_fhandle2,
809 .pc_argsize = sizeof(struct nfsd3_symlinkargs),
810 .pc_ressize = sizeof(struct nfsd3_createres),
811 .pc_cachetype = RC_REPLBUFF,
812 .pc_xdrressize = ST+(1+FH+pAT)+WC,
813 .pc_name = "SYMLINK",
814 },
815 [NFS3PROC_MKNOD] = {
816 .pc_func = nfsd3_proc_mknod,
817 .pc_decode = nfs3svc_decode_mknodargs,
818 .pc_encode = nfs3svc_encode_createres,
819 .pc_release = nfs3svc_release_fhandle2,
820 .pc_argsize = sizeof(struct nfsd3_mknodargs),
821 .pc_ressize = sizeof(struct nfsd3_createres),
822 .pc_cachetype = RC_REPLBUFF,
823 .pc_xdrressize = ST+(1+FH+pAT)+WC,
824 .pc_name = "MKNOD",
825 },
826 [NFS3PROC_REMOVE] = {
827 .pc_func = nfsd3_proc_remove,
828 .pc_decode = nfs3svc_decode_diropargs,
829 .pc_encode = nfs3svc_encode_wccstatres,
830 .pc_release = nfs3svc_release_fhandle,
831 .pc_argsize = sizeof(struct nfsd3_diropargs),
832 .pc_ressize = sizeof(struct nfsd3_wccstatres),
833 .pc_cachetype = RC_REPLBUFF,
834 .pc_xdrressize = ST+WC,
835 .pc_name = "REMOVE",
836 },
837 [NFS3PROC_RMDIR] = {
838 .pc_func = nfsd3_proc_rmdir,
839 .pc_decode = nfs3svc_decode_diropargs,
840 .pc_encode = nfs3svc_encode_wccstatres,
841 .pc_release = nfs3svc_release_fhandle,
842 .pc_argsize = sizeof(struct nfsd3_diropargs),
843 .pc_ressize = sizeof(struct nfsd3_wccstatres),
844 .pc_cachetype = RC_REPLBUFF,
845 .pc_xdrressize = ST+WC,
846 .pc_name = "RMDIR",
847 },
848 [NFS3PROC_RENAME] = {
849 .pc_func = nfsd3_proc_rename,
850 .pc_decode = nfs3svc_decode_renameargs,
851 .pc_encode = nfs3svc_encode_renameres,
852 .pc_release = nfs3svc_release_fhandle2,
853 .pc_argsize = sizeof(struct nfsd3_renameargs),
854 .pc_ressize = sizeof(struct nfsd3_renameres),
855 .pc_cachetype = RC_REPLBUFF,
856 .pc_xdrressize = ST+WC+WC,
857 .pc_name = "RENAME",
858 },
859 [NFS3PROC_LINK] = {
860 .pc_func = nfsd3_proc_link,
861 .pc_decode = nfs3svc_decode_linkargs,
862 .pc_encode = nfs3svc_encode_linkres,
863 .pc_release = nfs3svc_release_fhandle2,
864 .pc_argsize = sizeof(struct nfsd3_linkargs),
865 .pc_ressize = sizeof(struct nfsd3_linkres),
866 .pc_cachetype = RC_REPLBUFF,
867 .pc_xdrressize = ST+pAT+WC,
868 .pc_name = "LINK",
869 },
870 [NFS3PROC_READDIR] = {
871 .pc_func = nfsd3_proc_readdir,
872 .pc_decode = nfs3svc_decode_readdirargs,
873 .pc_encode = nfs3svc_encode_readdirres,
874 .pc_release = nfs3svc_release_fhandle,
875 .pc_argsize = sizeof(struct nfsd3_readdirargs),
876 .pc_ressize = sizeof(struct nfsd3_readdirres),
877 .pc_cachetype = RC_NOCACHE,
878 .pc_name = "READDIR",
879 },
880 [NFS3PROC_READDIRPLUS] = {
881 .pc_func = nfsd3_proc_readdirplus,
882 .pc_decode = nfs3svc_decode_readdirplusargs,
883 .pc_encode = nfs3svc_encode_readdirres,
884 .pc_release = nfs3svc_release_fhandle,
885 .pc_argsize = sizeof(struct nfsd3_readdirplusargs),
886 .pc_ressize = sizeof(struct nfsd3_readdirres),
887 .pc_cachetype = RC_NOCACHE,
888 .pc_name = "READDIRPLUS",
889 },
890 [NFS3PROC_FSSTAT] = {
891 .pc_func = nfsd3_proc_fsstat,
892 .pc_decode = nfs3svc_decode_fhandleargs,
893 .pc_encode = nfs3svc_encode_fsstatres,
894 .pc_argsize = sizeof(struct nfsd3_fhandleargs),
895 .pc_ressize = sizeof(struct nfsd3_fsstatres),
896 .pc_cachetype = RC_NOCACHE,
897 .pc_xdrressize = ST+pAT+2*6+1,
898 .pc_name = "FSSTAT",
899 },
900 [NFS3PROC_FSINFO] = {
901 .pc_func = nfsd3_proc_fsinfo,
902 .pc_decode = nfs3svc_decode_fhandleargs,
903 .pc_encode = nfs3svc_encode_fsinfores,
904 .pc_argsize = sizeof(struct nfsd3_fhandleargs),
905 .pc_ressize = sizeof(struct nfsd3_fsinfores),
906 .pc_cachetype = RC_NOCACHE,
907 .pc_xdrressize = ST+pAT+12,
908 .pc_name = "FSINFO",
909 },
910 [NFS3PROC_PATHCONF] = {
911 .pc_func = nfsd3_proc_pathconf,
912 .pc_decode = nfs3svc_decode_fhandleargs,
913 .pc_encode = nfs3svc_encode_pathconfres,
914 .pc_argsize = sizeof(struct nfsd3_fhandleargs),
915 .pc_ressize = sizeof(struct nfsd3_pathconfres),
916 .pc_cachetype = RC_NOCACHE,
917 .pc_xdrressize = ST+pAT+6,
918 .pc_name = "PATHCONF",
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 .pc_name = "COMMIT",
930 },
931 };
932
933 static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures3)];
934 const struct svc_version nfsd_version3 = {
935 .vs_vers = 3,
936 .vs_nproc = 22,
937 .vs_proc = nfsd_procedures3,
938 .vs_dispatch = nfsd_dispatch,
939 .vs_count = nfsd_count3,
940 .vs_xdrsize = NFS3_SVC_XDRSIZE,
941 };
942