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 nfsd3_readlinkargs *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->status = nfsd_readlink(rqstp, &resp->fh, argp->buffer, &resp->len);
136 return rpc_success;
137 }
138
139 /*
140 * Read a portion of a file.
141 */
142 static __be32
nfsd3_proc_read(struct svc_rqst * rqstp)143 nfsd3_proc_read(struct svc_rqst *rqstp)
144 {
145 struct nfsd3_readargs *argp = rqstp->rq_argp;
146 struct nfsd3_readres *resp = rqstp->rq_resp;
147 u32 max_blocksize = svc_max_payload(rqstp);
148 unsigned long cnt = min(argp->count, max_blocksize);
149
150 dprintk("nfsd: READ(3) %s %lu bytes at %Lu\n",
151 SVCFH_fmt(&argp->fh),
152 (unsigned long) argp->count,
153 (unsigned long long) argp->offset);
154
155 /* Obtain buffer pointer for payload.
156 * 1 (status) + 22 (post_op_attr) + 1 (count) + 1 (eof)
157 * + 1 (xdr opaque byte count) = 26
158 */
159 resp->count = cnt;
160 svc_reserve_auth(rqstp, ((1 + NFS3_POST_OP_ATTR_WORDS + 3)<<2) + resp->count +4);
161
162 fh_copy(&resp->fh, &argp->fh);
163 resp->status = nfsd_read(rqstp, &resp->fh, argp->offset,
164 rqstp->rq_vec, argp->vlen, &resp->count,
165 &resp->eof);
166 return rpc_success;
167 }
168
169 /*
170 * Write data to a file
171 */
172 static __be32
nfsd3_proc_write(struct svc_rqst * rqstp)173 nfsd3_proc_write(struct svc_rqst *rqstp)
174 {
175 struct nfsd3_writeargs *argp = rqstp->rq_argp;
176 struct nfsd3_writeres *resp = rqstp->rq_resp;
177 unsigned long cnt = argp->len;
178 unsigned int nvecs;
179
180 dprintk("nfsd: WRITE(3) %s %d bytes at %Lu%s\n",
181 SVCFH_fmt(&argp->fh),
182 argp->len,
183 (unsigned long long) argp->offset,
184 argp->stable? " stable" : "");
185
186 fh_copy(&resp->fh, &argp->fh);
187 resp->committed = argp->stable;
188 nvecs = svc_fill_write_vector(rqstp, rqstp->rq_arg.pages,
189 &argp->first, cnt);
190 if (!nvecs) {
191 resp->status = nfserr_io;
192 goto out;
193 }
194 resp->status = nfsd_write(rqstp, &resp->fh, argp->offset,
195 rqstp->rq_vec, nvecs, &cnt,
196 resp->committed, resp->verf);
197 resp->count = cnt;
198 out:
199 return rpc_success;
200 }
201
202 /*
203 * With NFSv3, CREATE processing is a lot easier than with NFSv2.
204 * At least in theory; we'll see how it fares in practice when the
205 * first reports about SunOS compatibility problems start to pour in...
206 */
207 static __be32
nfsd3_proc_create(struct svc_rqst * rqstp)208 nfsd3_proc_create(struct svc_rqst *rqstp)
209 {
210 struct nfsd3_createargs *argp = rqstp->rq_argp;
211 struct nfsd3_diropres *resp = rqstp->rq_resp;
212 svc_fh *dirfhp, *newfhp = NULL;
213 struct iattr *attr;
214
215 dprintk("nfsd: CREATE(3) %s %.*s\n",
216 SVCFH_fmt(&argp->fh),
217 argp->len,
218 argp->name);
219
220 dirfhp = fh_copy(&resp->dirfh, &argp->fh);
221 newfhp = fh_init(&resp->fh, NFS3_FHSIZE);
222 attr = &argp->attrs;
223
224 /* Unfudge the mode bits */
225 attr->ia_mode &= ~S_IFMT;
226 if (!(attr->ia_valid & ATTR_MODE)) {
227 attr->ia_valid |= ATTR_MODE;
228 attr->ia_mode = S_IFREG;
229 } else {
230 attr->ia_mode = (attr->ia_mode & ~S_IFMT) | S_IFREG;
231 }
232
233 /* Now create the file and set attributes */
234 resp->status = do_nfsd_create(rqstp, dirfhp, argp->name, argp->len,
235 attr, newfhp, argp->createmode,
236 (u32 *)argp->verf, NULL, NULL);
237 return rpc_success;
238 }
239
240 /*
241 * Make directory. This operation is not idempotent.
242 */
243 static __be32
nfsd3_proc_mkdir(struct svc_rqst * rqstp)244 nfsd3_proc_mkdir(struct svc_rqst *rqstp)
245 {
246 struct nfsd3_createargs *argp = rqstp->rq_argp;
247 struct nfsd3_diropres *resp = rqstp->rq_resp;
248
249 dprintk("nfsd: MKDIR(3) %s %.*s\n",
250 SVCFH_fmt(&argp->fh),
251 argp->len,
252 argp->name);
253
254 argp->attrs.ia_valid &= ~ATTR_SIZE;
255 fh_copy(&resp->dirfh, &argp->fh);
256 fh_init(&resp->fh, NFS3_FHSIZE);
257 resp->status = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len,
258 &argp->attrs, S_IFDIR, 0, &resp->fh);
259 fh_unlock(&resp->dirfh);
260 return rpc_success;
261 }
262
263 static __be32
nfsd3_proc_symlink(struct svc_rqst * rqstp)264 nfsd3_proc_symlink(struct svc_rqst *rqstp)
265 {
266 struct nfsd3_symlinkargs *argp = rqstp->rq_argp;
267 struct nfsd3_diropres *resp = rqstp->rq_resp;
268
269 if (argp->tlen == 0) {
270 resp->status = nfserr_inval;
271 goto out;
272 }
273 if (argp->tlen > NFS3_MAXPATHLEN) {
274 resp->status = nfserr_nametoolong;
275 goto out;
276 }
277
278 argp->tname = svc_fill_symlink_pathname(rqstp, &argp->first,
279 page_address(rqstp->rq_arg.pages[0]),
280 argp->tlen);
281 if (IS_ERR(argp->tname)) {
282 resp->status = nfserrno(PTR_ERR(argp->tname));
283 goto out;
284 }
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 resp->status = nfsd_symlink(rqstp, &resp->dirfh, argp->fname,
294 argp->flen, argp->tname, &resp->fh);
295 kfree(argp->tname);
296 out:
297 return rpc_success;
298 }
299
300 /*
301 * Make socket/fifo/device.
302 */
303 static __be32
nfsd3_proc_mknod(struct svc_rqst * rqstp)304 nfsd3_proc_mknod(struct svc_rqst *rqstp)
305 {
306 struct nfsd3_mknodargs *argp = rqstp->rq_argp;
307 struct nfsd3_diropres *resp = rqstp->rq_resp;
308 int type;
309 dev_t rdev = 0;
310
311 dprintk("nfsd: MKNOD(3) %s %.*s\n",
312 SVCFH_fmt(&argp->fh),
313 argp->len,
314 argp->name);
315
316 fh_copy(&resp->dirfh, &argp->fh);
317 fh_init(&resp->fh, NFS3_FHSIZE);
318
319 if (argp->ftype == NF3CHR || argp->ftype == NF3BLK) {
320 rdev = MKDEV(argp->major, argp->minor);
321 if (MAJOR(rdev) != argp->major ||
322 MINOR(rdev) != argp->minor) {
323 resp->status = nfserr_inval;
324 goto out;
325 }
326 } else if (argp->ftype != NF3SOCK && argp->ftype != NF3FIFO) {
327 resp->status = nfserr_badtype;
328 goto out;
329 }
330
331 type = nfs3_ftypes[argp->ftype];
332 resp->status = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len,
333 &argp->attrs, type, rdev, &resp->fh);
334 fh_unlock(&resp->dirfh);
335 out:
336 return rpc_success;
337 }
338
339 /*
340 * Remove file/fifo/socket etc.
341 */
342 static __be32
nfsd3_proc_remove(struct svc_rqst * rqstp)343 nfsd3_proc_remove(struct svc_rqst *rqstp)
344 {
345 struct nfsd3_diropargs *argp = rqstp->rq_argp;
346 struct nfsd3_attrstat *resp = rqstp->rq_resp;
347
348 dprintk("nfsd: REMOVE(3) %s %.*s\n",
349 SVCFH_fmt(&argp->fh),
350 argp->len,
351 argp->name);
352
353 /* Unlink. -S_IFDIR means file must not be a directory */
354 fh_copy(&resp->fh, &argp->fh);
355 resp->status = nfsd_unlink(rqstp, &resp->fh, -S_IFDIR,
356 argp->name, argp->len);
357 fh_unlock(&resp->fh);
358 return rpc_success;
359 }
360
361 /*
362 * Remove a directory
363 */
364 static __be32
nfsd3_proc_rmdir(struct svc_rqst * rqstp)365 nfsd3_proc_rmdir(struct svc_rqst *rqstp)
366 {
367 struct nfsd3_diropargs *argp = rqstp->rq_argp;
368 struct nfsd3_attrstat *resp = rqstp->rq_resp;
369
370 dprintk("nfsd: RMDIR(3) %s %.*s\n",
371 SVCFH_fmt(&argp->fh),
372 argp->len,
373 argp->name);
374
375 fh_copy(&resp->fh, &argp->fh);
376 resp->status = nfsd_unlink(rqstp, &resp->fh, S_IFDIR,
377 argp->name, argp->len);
378 fh_unlock(&resp->fh);
379 return rpc_success;
380 }
381
382 static __be32
nfsd3_proc_rename(struct svc_rqst * rqstp)383 nfsd3_proc_rename(struct svc_rqst *rqstp)
384 {
385 struct nfsd3_renameargs *argp = rqstp->rq_argp;
386 struct nfsd3_renameres *resp = rqstp->rq_resp;
387
388 dprintk("nfsd: RENAME(3) %s %.*s ->\n",
389 SVCFH_fmt(&argp->ffh),
390 argp->flen,
391 argp->fname);
392 dprintk("nfsd: -> %s %.*s\n",
393 SVCFH_fmt(&argp->tfh),
394 argp->tlen,
395 argp->tname);
396
397 fh_copy(&resp->ffh, &argp->ffh);
398 fh_copy(&resp->tfh, &argp->tfh);
399 resp->status = nfsd_rename(rqstp, &resp->ffh, argp->fname, argp->flen,
400 &resp->tfh, argp->tname, argp->tlen);
401 return rpc_success;
402 }
403
404 static __be32
nfsd3_proc_link(struct svc_rqst * rqstp)405 nfsd3_proc_link(struct svc_rqst *rqstp)
406 {
407 struct nfsd3_linkargs *argp = rqstp->rq_argp;
408 struct nfsd3_linkres *resp = rqstp->rq_resp;
409
410 dprintk("nfsd: LINK(3) %s ->\n",
411 SVCFH_fmt(&argp->ffh));
412 dprintk("nfsd: -> %s %.*s\n",
413 SVCFH_fmt(&argp->tfh),
414 argp->tlen,
415 argp->tname);
416
417 fh_copy(&resp->fh, &argp->ffh);
418 fh_copy(&resp->tfh, &argp->tfh);
419 resp->status = nfsd_link(rqstp, &resp->tfh, argp->tname, argp->tlen,
420 &resp->fh);
421 return rpc_success;
422 }
423
424 /*
425 * Read a portion of a directory.
426 */
427 static __be32
nfsd3_proc_readdir(struct svc_rqst * rqstp)428 nfsd3_proc_readdir(struct svc_rqst *rqstp)
429 {
430 struct nfsd3_readdirargs *argp = rqstp->rq_argp;
431 struct nfsd3_readdirres *resp = rqstp->rq_resp;
432 int count = 0;
433 struct page **p;
434 caddr_t page_addr = NULL;
435
436 dprintk("nfsd: READDIR(3) %s %d bytes at %d\n",
437 SVCFH_fmt(&argp->fh),
438 argp->count, (u32) argp->cookie);
439
440 /* Make sure we've room for the NULL ptr & eof flag, and shrink to
441 * client read size */
442 count = (argp->count >> 2) - 2;
443
444 /* Read directory and encode entries on the fly */
445 fh_copy(&resp->fh, &argp->fh);
446
447 resp->buflen = count;
448 resp->common.err = nfs_ok;
449 resp->buffer = argp->buffer;
450 resp->rqstp = rqstp;
451 resp->status = nfsd_readdir(rqstp, &resp->fh, (loff_t *)&argp->cookie,
452 &resp->common, nfs3svc_encode_entry);
453 memcpy(resp->verf, argp->verf, 8);
454 count = 0;
455 for (p = rqstp->rq_respages + 1; p < rqstp->rq_next_page; p++) {
456 page_addr = page_address(*p);
457
458 if (((caddr_t)resp->buffer >= page_addr) &&
459 ((caddr_t)resp->buffer < page_addr + PAGE_SIZE)) {
460 count += (caddr_t)resp->buffer - page_addr;
461 break;
462 }
463 count += PAGE_SIZE;
464 }
465 resp->count = count >> 2;
466 if (resp->offset) {
467 loff_t offset = argp->cookie;
468
469 if (unlikely(resp->offset1)) {
470 /* we ended up with offset on a page boundary */
471 *resp->offset = htonl(offset >> 32);
472 *resp->offset1 = htonl(offset & 0xffffffff);
473 resp->offset1 = NULL;
474 } else {
475 xdr_encode_hyper(resp->offset, offset);
476 }
477 resp->offset = NULL;
478 }
479
480 return rpc_success;
481 }
482
483 /*
484 * Read a portion of a directory, including file handles and attrs.
485 * For now, we choose to ignore the dircount parameter.
486 */
487 static __be32
nfsd3_proc_readdirplus(struct svc_rqst * rqstp)488 nfsd3_proc_readdirplus(struct svc_rqst *rqstp)
489 {
490 struct nfsd3_readdirargs *argp = rqstp->rq_argp;
491 struct nfsd3_readdirres *resp = rqstp->rq_resp;
492 int count = 0;
493 loff_t offset;
494 struct page **p;
495 caddr_t page_addr = NULL;
496
497 dprintk("nfsd: READDIR+(3) %s %d bytes at %d\n",
498 SVCFH_fmt(&argp->fh),
499 argp->count, (u32) argp->cookie);
500
501 /* Convert byte count to number of words (i.e. >> 2),
502 * and reserve room for the NULL ptr & eof flag (-2 words) */
503 resp->count = (argp->count >> 2) - 2;
504
505 /* Read directory and encode entries on the fly */
506 fh_copy(&resp->fh, &argp->fh);
507
508 resp->common.err = nfs_ok;
509 resp->buffer = argp->buffer;
510 resp->buflen = resp->count;
511 resp->rqstp = rqstp;
512 offset = argp->cookie;
513
514 resp->status = fh_verify(rqstp, &resp->fh, S_IFDIR, NFSD_MAY_NOP);
515 if (resp->status != nfs_ok)
516 goto out;
517
518 if (resp->fh.fh_export->ex_flags & NFSEXP_NOREADDIRPLUS) {
519 resp->status = nfserr_notsupp;
520 goto out;
521 }
522
523 resp->status = nfsd_readdir(rqstp, &resp->fh, &offset,
524 &resp->common, nfs3svc_encode_entry_plus);
525 memcpy(resp->verf, argp->verf, 8);
526 for (p = rqstp->rq_respages + 1; p < rqstp->rq_next_page; p++) {
527 page_addr = page_address(*p);
528
529 if (((caddr_t)resp->buffer >= page_addr) &&
530 ((caddr_t)resp->buffer < page_addr + PAGE_SIZE)) {
531 count += (caddr_t)resp->buffer - page_addr;
532 break;
533 }
534 count += PAGE_SIZE;
535 }
536 resp->count = count >> 2;
537 if (resp->offset) {
538 if (unlikely(resp->offset1)) {
539 /* we ended up with offset on a page boundary */
540 *resp->offset = htonl(offset >> 32);
541 *resp->offset1 = htonl(offset & 0xffffffff);
542 resp->offset1 = NULL;
543 } else {
544 xdr_encode_hyper(resp->offset, offset);
545 }
546 resp->offset = NULL;
547 }
548
549 out:
550 return rpc_success;
551 }
552
553 /*
554 * Get file system stats
555 */
556 static __be32
nfsd3_proc_fsstat(struct svc_rqst * rqstp)557 nfsd3_proc_fsstat(struct svc_rqst *rqstp)
558 {
559 struct nfsd_fhandle *argp = rqstp->rq_argp;
560 struct nfsd3_fsstatres *resp = rqstp->rq_resp;
561
562 dprintk("nfsd: FSSTAT(3) %s\n",
563 SVCFH_fmt(&argp->fh));
564
565 resp->status = nfsd_statfs(rqstp, &argp->fh, &resp->stats, 0);
566 fh_put(&argp->fh);
567 return rpc_success;
568 }
569
570 /*
571 * Get file system info
572 */
573 static __be32
nfsd3_proc_fsinfo(struct svc_rqst * rqstp)574 nfsd3_proc_fsinfo(struct svc_rqst *rqstp)
575 {
576 struct nfsd_fhandle *argp = rqstp->rq_argp;
577 struct nfsd3_fsinfores *resp = rqstp->rq_resp;
578 u32 max_blocksize = svc_max_payload(rqstp);
579
580 dprintk("nfsd: FSINFO(3) %s\n",
581 SVCFH_fmt(&argp->fh));
582
583 resp->f_rtmax = max_blocksize;
584 resp->f_rtpref = max_blocksize;
585 resp->f_rtmult = PAGE_SIZE;
586 resp->f_wtmax = max_blocksize;
587 resp->f_wtpref = max_blocksize;
588 resp->f_wtmult = PAGE_SIZE;
589 resp->f_dtpref = max_blocksize;
590 resp->f_maxfilesize = ~(u32) 0;
591 resp->f_properties = NFS3_FSF_DEFAULT;
592
593 resp->status = fh_verify(rqstp, &argp->fh, 0,
594 NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT);
595
596 /* Check special features of the file system. May request
597 * different read/write sizes for file systems known to have
598 * problems with large blocks */
599 if (resp->status == nfs_ok) {
600 struct super_block *sb = argp->fh.fh_dentry->d_sb;
601
602 /* Note that we don't care for remote fs's here */
603 if (sb->s_magic == MSDOS_SUPER_MAGIC) {
604 resp->f_properties = NFS3_FSF_BILLYBOY;
605 }
606 resp->f_maxfilesize = sb->s_maxbytes;
607 }
608
609 fh_put(&argp->fh);
610 return rpc_success;
611 }
612
613 /*
614 * Get pathconf info for the specified file
615 */
616 static __be32
nfsd3_proc_pathconf(struct svc_rqst * rqstp)617 nfsd3_proc_pathconf(struct svc_rqst *rqstp)
618 {
619 struct nfsd_fhandle *argp = rqstp->rq_argp;
620 struct nfsd3_pathconfres *resp = rqstp->rq_resp;
621
622 dprintk("nfsd: PATHCONF(3) %s\n",
623 SVCFH_fmt(&argp->fh));
624
625 /* Set default pathconf */
626 resp->p_link_max = 255; /* at least */
627 resp->p_name_max = 255; /* at least */
628 resp->p_no_trunc = 0;
629 resp->p_chown_restricted = 1;
630 resp->p_case_insensitive = 0;
631 resp->p_case_preserving = 1;
632
633 resp->status = fh_verify(rqstp, &argp->fh, 0, NFSD_MAY_NOP);
634
635 if (resp->status == nfs_ok) {
636 struct super_block *sb = argp->fh.fh_dentry->d_sb;
637
638 /* Note that we don't care for remote fs's here */
639 switch (sb->s_magic) {
640 case EXT2_SUPER_MAGIC:
641 resp->p_link_max = EXT2_LINK_MAX;
642 resp->p_name_max = EXT2_NAME_LEN;
643 break;
644 case MSDOS_SUPER_MAGIC:
645 resp->p_case_insensitive = 1;
646 resp->p_case_preserving = 0;
647 break;
648 }
649 }
650
651 fh_put(&argp->fh);
652 return rpc_success;
653 }
654
655 /*
656 * Commit a file (range) to stable storage.
657 */
658 static __be32
nfsd3_proc_commit(struct svc_rqst * rqstp)659 nfsd3_proc_commit(struct svc_rqst *rqstp)
660 {
661 struct nfsd3_commitargs *argp = rqstp->rq_argp;
662 struct nfsd3_commitres *resp = rqstp->rq_resp;
663
664 dprintk("nfsd: COMMIT(3) %s %u@%Lu\n",
665 SVCFH_fmt(&argp->fh),
666 argp->count,
667 (unsigned long long) argp->offset);
668
669 if (argp->offset > NFS_OFFSET_MAX) {
670 resp->status = nfserr_inval;
671 goto out;
672 }
673
674 fh_copy(&resp->fh, &argp->fh);
675 resp->status = nfsd_commit(rqstp, &resp->fh, argp->offset,
676 argp->count, resp->verf);
677 out:
678 return rpc_success;
679 }
680
681
682 /*
683 * NFSv3 Server procedures.
684 * Only the results of non-idempotent operations are cached.
685 */
686 #define nfs3svc_decode_fhandleargs nfs3svc_decode_fhandle
687 #define nfs3svc_encode_attrstatres nfs3svc_encode_attrstat
688 #define nfs3svc_encode_wccstatres nfs3svc_encode_wccstat
689 #define nfsd3_mkdirargs nfsd3_createargs
690 #define nfsd3_readdirplusargs nfsd3_readdirargs
691 #define nfsd3_fhandleargs nfsd_fhandle
692 #define nfsd3_fhandleres nfsd3_attrstat
693 #define nfsd3_attrstatres nfsd3_attrstat
694 #define nfsd3_wccstatres nfsd3_attrstat
695 #define nfsd3_createres nfsd3_diropres
696 #define nfsd3_voidres nfsd3_voidargs
697 struct nfsd3_voidargs { int dummy; };
698
699 #define ST 1 /* status*/
700 #define FH 17 /* filehandle with length */
701 #define AT 21 /* attributes */
702 #define pAT (1+AT) /* post attributes - conditional */
703 #define WC (7+pAT) /* WCC attributes */
704
705 static const struct svc_procedure nfsd_procedures3[22] = {
706 [NFS3PROC_NULL] = {
707 .pc_func = nfsd3_proc_null,
708 .pc_decode = nfs3svc_decode_voidarg,
709 .pc_encode = nfs3svc_encode_voidres,
710 .pc_argsize = sizeof(struct nfsd3_voidargs),
711 .pc_ressize = sizeof(struct nfsd3_voidres),
712 .pc_cachetype = RC_NOCACHE,
713 .pc_xdrressize = ST,
714 },
715 [NFS3PROC_GETATTR] = {
716 .pc_func = nfsd3_proc_getattr,
717 .pc_decode = nfs3svc_decode_fhandleargs,
718 .pc_encode = nfs3svc_encode_attrstatres,
719 .pc_release = nfs3svc_release_fhandle,
720 .pc_argsize = sizeof(struct nfsd3_fhandleargs),
721 .pc_ressize = sizeof(struct nfsd3_attrstatres),
722 .pc_cachetype = RC_NOCACHE,
723 .pc_xdrressize = ST+AT,
724 },
725 [NFS3PROC_SETATTR] = {
726 .pc_func = nfsd3_proc_setattr,
727 .pc_decode = nfs3svc_decode_sattrargs,
728 .pc_encode = nfs3svc_encode_wccstatres,
729 .pc_release = nfs3svc_release_fhandle,
730 .pc_argsize = sizeof(struct nfsd3_sattrargs),
731 .pc_ressize = sizeof(struct nfsd3_wccstatres),
732 .pc_cachetype = RC_REPLBUFF,
733 .pc_xdrressize = ST+WC,
734 },
735 [NFS3PROC_LOOKUP] = {
736 .pc_func = nfsd3_proc_lookup,
737 .pc_decode = nfs3svc_decode_diropargs,
738 .pc_encode = nfs3svc_encode_diropres,
739 .pc_release = nfs3svc_release_fhandle2,
740 .pc_argsize = sizeof(struct nfsd3_diropargs),
741 .pc_ressize = sizeof(struct nfsd3_diropres),
742 .pc_cachetype = RC_NOCACHE,
743 .pc_xdrressize = ST+FH+pAT+pAT,
744 },
745 [NFS3PROC_ACCESS] = {
746 .pc_func = nfsd3_proc_access,
747 .pc_decode = nfs3svc_decode_accessargs,
748 .pc_encode = nfs3svc_encode_accessres,
749 .pc_release = nfs3svc_release_fhandle,
750 .pc_argsize = sizeof(struct nfsd3_accessargs),
751 .pc_ressize = sizeof(struct nfsd3_accessres),
752 .pc_cachetype = RC_NOCACHE,
753 .pc_xdrressize = ST+pAT+1,
754 },
755 [NFS3PROC_READLINK] = {
756 .pc_func = nfsd3_proc_readlink,
757 .pc_decode = nfs3svc_decode_readlinkargs,
758 .pc_encode = nfs3svc_encode_readlinkres,
759 .pc_release = nfs3svc_release_fhandle,
760 .pc_argsize = sizeof(struct nfsd3_readlinkargs),
761 .pc_ressize = sizeof(struct nfsd3_readlinkres),
762 .pc_cachetype = RC_NOCACHE,
763 .pc_xdrressize = ST+pAT+1+NFS3_MAXPATHLEN/4,
764 },
765 [NFS3PROC_READ] = {
766 .pc_func = nfsd3_proc_read,
767 .pc_decode = nfs3svc_decode_readargs,
768 .pc_encode = nfs3svc_encode_readres,
769 .pc_release = nfs3svc_release_fhandle,
770 .pc_argsize = sizeof(struct nfsd3_readargs),
771 .pc_ressize = sizeof(struct nfsd3_readres),
772 .pc_cachetype = RC_NOCACHE,
773 .pc_xdrressize = ST+pAT+4+NFSSVC_MAXBLKSIZE/4,
774 },
775 [NFS3PROC_WRITE] = {
776 .pc_func = nfsd3_proc_write,
777 .pc_decode = nfs3svc_decode_writeargs,
778 .pc_encode = nfs3svc_encode_writeres,
779 .pc_release = nfs3svc_release_fhandle,
780 .pc_argsize = sizeof(struct nfsd3_writeargs),
781 .pc_ressize = sizeof(struct nfsd3_writeres),
782 .pc_cachetype = RC_REPLBUFF,
783 .pc_xdrressize = ST+WC+4,
784 },
785 [NFS3PROC_CREATE] = {
786 .pc_func = nfsd3_proc_create,
787 .pc_decode = nfs3svc_decode_createargs,
788 .pc_encode = nfs3svc_encode_createres,
789 .pc_release = nfs3svc_release_fhandle2,
790 .pc_argsize = sizeof(struct nfsd3_createargs),
791 .pc_ressize = sizeof(struct nfsd3_createres),
792 .pc_cachetype = RC_REPLBUFF,
793 .pc_xdrressize = ST+(1+FH+pAT)+WC,
794 },
795 [NFS3PROC_MKDIR] = {
796 .pc_func = nfsd3_proc_mkdir,
797 .pc_decode = nfs3svc_decode_mkdirargs,
798 .pc_encode = nfs3svc_encode_createres,
799 .pc_release = nfs3svc_release_fhandle2,
800 .pc_argsize = sizeof(struct nfsd3_mkdirargs),
801 .pc_ressize = sizeof(struct nfsd3_createres),
802 .pc_cachetype = RC_REPLBUFF,
803 .pc_xdrressize = ST+(1+FH+pAT)+WC,
804 },
805 [NFS3PROC_SYMLINK] = {
806 .pc_func = nfsd3_proc_symlink,
807 .pc_decode = nfs3svc_decode_symlinkargs,
808 .pc_encode = nfs3svc_encode_createres,
809 .pc_release = nfs3svc_release_fhandle2,
810 .pc_argsize = sizeof(struct nfsd3_symlinkargs),
811 .pc_ressize = sizeof(struct nfsd3_createres),
812 .pc_cachetype = RC_REPLBUFF,
813 .pc_xdrressize = ST+(1+FH+pAT)+WC,
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 },
825 [NFS3PROC_REMOVE] = {
826 .pc_func = nfsd3_proc_remove,
827 .pc_decode = nfs3svc_decode_diropargs,
828 .pc_encode = nfs3svc_encode_wccstatres,
829 .pc_release = nfs3svc_release_fhandle,
830 .pc_argsize = sizeof(struct nfsd3_diropargs),
831 .pc_ressize = sizeof(struct nfsd3_wccstatres),
832 .pc_cachetype = RC_REPLBUFF,
833 .pc_xdrressize = ST+WC,
834 },
835 [NFS3PROC_RMDIR] = {
836 .pc_func = nfsd3_proc_rmdir,
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_RENAME] = {
846 .pc_func = nfsd3_proc_rename,
847 .pc_decode = nfs3svc_decode_renameargs,
848 .pc_encode = nfs3svc_encode_renameres,
849 .pc_release = nfs3svc_release_fhandle2,
850 .pc_argsize = sizeof(struct nfsd3_renameargs),
851 .pc_ressize = sizeof(struct nfsd3_renameres),
852 .pc_cachetype = RC_REPLBUFF,
853 .pc_xdrressize = ST+WC+WC,
854 },
855 [NFS3PROC_LINK] = {
856 .pc_func = nfsd3_proc_link,
857 .pc_decode = nfs3svc_decode_linkargs,
858 .pc_encode = nfs3svc_encode_linkres,
859 .pc_release = nfs3svc_release_fhandle2,
860 .pc_argsize = sizeof(struct nfsd3_linkargs),
861 .pc_ressize = sizeof(struct nfsd3_linkres),
862 .pc_cachetype = RC_REPLBUFF,
863 .pc_xdrressize = ST+pAT+WC,
864 },
865 [NFS3PROC_READDIR] = {
866 .pc_func = nfsd3_proc_readdir,
867 .pc_decode = nfs3svc_decode_readdirargs,
868 .pc_encode = nfs3svc_encode_readdirres,
869 .pc_release = nfs3svc_release_fhandle,
870 .pc_argsize = sizeof(struct nfsd3_readdirargs),
871 .pc_ressize = sizeof(struct nfsd3_readdirres),
872 .pc_cachetype = RC_NOCACHE,
873 },
874 [NFS3PROC_READDIRPLUS] = {
875 .pc_func = nfsd3_proc_readdirplus,
876 .pc_decode = nfs3svc_decode_readdirplusargs,
877 .pc_encode = nfs3svc_encode_readdirres,
878 .pc_release = nfs3svc_release_fhandle,
879 .pc_argsize = sizeof(struct nfsd3_readdirplusargs),
880 .pc_ressize = sizeof(struct nfsd3_readdirres),
881 .pc_cachetype = RC_NOCACHE,
882 },
883 [NFS3PROC_FSSTAT] = {
884 .pc_func = nfsd3_proc_fsstat,
885 .pc_decode = nfs3svc_decode_fhandleargs,
886 .pc_encode = nfs3svc_encode_fsstatres,
887 .pc_argsize = sizeof(struct nfsd3_fhandleargs),
888 .pc_ressize = sizeof(struct nfsd3_fsstatres),
889 .pc_cachetype = RC_NOCACHE,
890 .pc_xdrressize = ST+pAT+2*6+1,
891 },
892 [NFS3PROC_FSINFO] = {
893 .pc_func = nfsd3_proc_fsinfo,
894 .pc_decode = nfs3svc_decode_fhandleargs,
895 .pc_encode = nfs3svc_encode_fsinfores,
896 .pc_argsize = sizeof(struct nfsd3_fhandleargs),
897 .pc_ressize = sizeof(struct nfsd3_fsinfores),
898 .pc_cachetype = RC_NOCACHE,
899 .pc_xdrressize = ST+pAT+12,
900 },
901 [NFS3PROC_PATHCONF] = {
902 .pc_func = nfsd3_proc_pathconf,
903 .pc_decode = nfs3svc_decode_fhandleargs,
904 .pc_encode = nfs3svc_encode_pathconfres,
905 .pc_argsize = sizeof(struct nfsd3_fhandleargs),
906 .pc_ressize = sizeof(struct nfsd3_pathconfres),
907 .pc_cachetype = RC_NOCACHE,
908 .pc_xdrressize = ST+pAT+6,
909 },
910 [NFS3PROC_COMMIT] = {
911 .pc_func = nfsd3_proc_commit,
912 .pc_decode = nfs3svc_decode_commitargs,
913 .pc_encode = nfs3svc_encode_commitres,
914 .pc_release = nfs3svc_release_fhandle,
915 .pc_argsize = sizeof(struct nfsd3_commitargs),
916 .pc_ressize = sizeof(struct nfsd3_commitres),
917 .pc_cachetype = RC_NOCACHE,
918 .pc_xdrressize = ST+WC+2,
919 },
920 };
921
922 static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures3)];
923 const struct svc_version nfsd_version3 = {
924 .vs_vers = 3,
925 .vs_nproc = 22,
926 .vs_proc = nfsd_procedures3,
927 .vs_dispatch = nfsd_dispatch,
928 .vs_count = nfsd_count3,
929 .vs_xdrsize = NFS3_SVC_XDRSIZE,
930 };
931
