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 resp->status = nfserr_fbig;
187 if (argp->offset > (u64)OFFSET_MAX ||
188 argp->offset + argp->len > (u64)OFFSET_MAX)
189 return rpc_success;
190
191 fh_copy(&resp->fh, &argp->fh);
192 resp->committed = argp->stable;
193 nvecs = svc_fill_write_vector(rqstp, rqstp->rq_arg.pages,
194 &argp->first, cnt);
195 if (!nvecs) {
196 resp->status = nfserr_io;
197 goto out;
198 }
199 resp->status = nfsd_write(rqstp, &resp->fh, argp->offset,
200 rqstp->rq_vec, nvecs, &cnt,
201 resp->committed, resp->verf);
202 resp->count = cnt;
203 out:
204 return rpc_success;
205 }
206
207 /*
208 * With NFSv3, CREATE processing is a lot easier than with NFSv2.
209 * At least in theory; we'll see how it fares in practice when the
210 * first reports about SunOS compatibility problems start to pour in...
211 */
212 static __be32
nfsd3_proc_create(struct svc_rqst * rqstp)213 nfsd3_proc_create(struct svc_rqst *rqstp)
214 {
215 struct nfsd3_createargs *argp = rqstp->rq_argp;
216 struct nfsd3_diropres *resp = rqstp->rq_resp;
217 svc_fh *dirfhp, *newfhp = NULL;
218 struct iattr *attr;
219
220 dprintk("nfsd: CREATE(3) %s %.*s\n",
221 SVCFH_fmt(&argp->fh),
222 argp->len,
223 argp->name);
224
225 dirfhp = fh_copy(&resp->dirfh, &argp->fh);
226 newfhp = fh_init(&resp->fh, NFS3_FHSIZE);
227 attr = &argp->attrs;
228
229 /* Unfudge the mode bits */
230 attr->ia_mode &= ~S_IFMT;
231 if (!(attr->ia_valid & ATTR_MODE)) {
232 attr->ia_valid |= ATTR_MODE;
233 attr->ia_mode = S_IFREG;
234 } else {
235 attr->ia_mode = (attr->ia_mode & ~S_IFMT) | S_IFREG;
236 }
237
238 /* Now create the file and set attributes */
239 resp->status = do_nfsd_create(rqstp, dirfhp, argp->name, argp->len,
240 attr, newfhp, argp->createmode,
241 (u32 *)argp->verf, NULL, NULL);
242 return rpc_success;
243 }
244
245 /*
246 * Make directory. This operation is not idempotent.
247 */
248 static __be32
nfsd3_proc_mkdir(struct svc_rqst * rqstp)249 nfsd3_proc_mkdir(struct svc_rqst *rqstp)
250 {
251 struct nfsd3_createargs *argp = rqstp->rq_argp;
252 struct nfsd3_diropres *resp = rqstp->rq_resp;
253
254 dprintk("nfsd: MKDIR(3) %s %.*s\n",
255 SVCFH_fmt(&argp->fh),
256 argp->len,
257 argp->name);
258
259 argp->attrs.ia_valid &= ~ATTR_SIZE;
260 fh_copy(&resp->dirfh, &argp->fh);
261 fh_init(&resp->fh, NFS3_FHSIZE);
262 resp->status = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len,
263 &argp->attrs, S_IFDIR, 0, &resp->fh);
264 fh_unlock(&resp->dirfh);
265 return rpc_success;
266 }
267
268 static __be32
nfsd3_proc_symlink(struct svc_rqst * rqstp)269 nfsd3_proc_symlink(struct svc_rqst *rqstp)
270 {
271 struct nfsd3_symlinkargs *argp = rqstp->rq_argp;
272 struct nfsd3_diropres *resp = rqstp->rq_resp;
273
274 if (argp->tlen == 0) {
275 resp->status = nfserr_inval;
276 goto out;
277 }
278 if (argp->tlen > NFS3_MAXPATHLEN) {
279 resp->status = nfserr_nametoolong;
280 goto out;
281 }
282
283 argp->tname = svc_fill_symlink_pathname(rqstp, &argp->first,
284 page_address(rqstp->rq_arg.pages[0]),
285 argp->tlen);
286 if (IS_ERR(argp->tname)) {
287 resp->status = nfserrno(PTR_ERR(argp->tname));
288 goto out;
289 }
290
291 dprintk("nfsd: SYMLINK(3) %s %.*s -> %.*s\n",
292 SVCFH_fmt(&argp->ffh),
293 argp->flen, argp->fname,
294 argp->tlen, argp->tname);
295
296 fh_copy(&resp->dirfh, &argp->ffh);
297 fh_init(&resp->fh, NFS3_FHSIZE);
298 resp->status = nfsd_symlink(rqstp, &resp->dirfh, argp->fname,
299 argp->flen, argp->tname, &resp->fh);
300 kfree(argp->tname);
301 out:
302 return rpc_success;
303 }
304
305 /*
306 * Make socket/fifo/device.
307 */
308 static __be32
nfsd3_proc_mknod(struct svc_rqst * rqstp)309 nfsd3_proc_mknod(struct svc_rqst *rqstp)
310 {
311 struct nfsd3_mknodargs *argp = rqstp->rq_argp;
312 struct nfsd3_diropres *resp = rqstp->rq_resp;
313 int type;
314 dev_t rdev = 0;
315
316 dprintk("nfsd: MKNOD(3) %s %.*s\n",
317 SVCFH_fmt(&argp->fh),
318 argp->len,
319 argp->name);
320
321 fh_copy(&resp->dirfh, &argp->fh);
322 fh_init(&resp->fh, NFS3_FHSIZE);
323
324 if (argp->ftype == NF3CHR || argp->ftype == NF3BLK) {
325 rdev = MKDEV(argp->major, argp->minor);
326 if (MAJOR(rdev) != argp->major ||
327 MINOR(rdev) != argp->minor) {
328 resp->status = nfserr_inval;
329 goto out;
330 }
331 } else if (argp->ftype != NF3SOCK && argp->ftype != NF3FIFO) {
332 resp->status = nfserr_badtype;
333 goto out;
334 }
335
336 type = nfs3_ftypes[argp->ftype];
337 resp->status = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len,
338 &argp->attrs, type, rdev, &resp->fh);
339 fh_unlock(&resp->dirfh);
340 out:
341 return rpc_success;
342 }
343
344 /*
345 * Remove file/fifo/socket etc.
346 */
347 static __be32
nfsd3_proc_remove(struct svc_rqst * rqstp)348 nfsd3_proc_remove(struct svc_rqst *rqstp)
349 {
350 struct nfsd3_diropargs *argp = rqstp->rq_argp;
351 struct nfsd3_attrstat *resp = rqstp->rq_resp;
352
353 dprintk("nfsd: REMOVE(3) %s %.*s\n",
354 SVCFH_fmt(&argp->fh),
355 argp->len,
356 argp->name);
357
358 /* Unlink. -S_IFDIR means file must not be a directory */
359 fh_copy(&resp->fh, &argp->fh);
360 resp->status = nfsd_unlink(rqstp, &resp->fh, -S_IFDIR,
361 argp->name, argp->len);
362 fh_unlock(&resp->fh);
363 return rpc_success;
364 }
365
366 /*
367 * Remove a directory
368 */
369 static __be32
nfsd3_proc_rmdir(struct svc_rqst * rqstp)370 nfsd3_proc_rmdir(struct svc_rqst *rqstp)
371 {
372 struct nfsd3_diropargs *argp = rqstp->rq_argp;
373 struct nfsd3_attrstat *resp = rqstp->rq_resp;
374
375 dprintk("nfsd: RMDIR(3) %s %.*s\n",
376 SVCFH_fmt(&argp->fh),
377 argp->len,
378 argp->name);
379
380 fh_copy(&resp->fh, &argp->fh);
381 resp->status = nfsd_unlink(rqstp, &resp->fh, S_IFDIR,
382 argp->name, argp->len);
383 fh_unlock(&resp->fh);
384 return rpc_success;
385 }
386
387 static __be32
nfsd3_proc_rename(struct svc_rqst * rqstp)388 nfsd3_proc_rename(struct svc_rqst *rqstp)
389 {
390 struct nfsd3_renameargs *argp = rqstp->rq_argp;
391 struct nfsd3_renameres *resp = rqstp->rq_resp;
392
393 dprintk("nfsd: RENAME(3) %s %.*s ->\n",
394 SVCFH_fmt(&argp->ffh),
395 argp->flen,
396 argp->fname);
397 dprintk("nfsd: -> %s %.*s\n",
398 SVCFH_fmt(&argp->tfh),
399 argp->tlen,
400 argp->tname);
401
402 fh_copy(&resp->ffh, &argp->ffh);
403 fh_copy(&resp->tfh, &argp->tfh);
404 resp->status = nfsd_rename(rqstp, &resp->ffh, argp->fname, argp->flen,
405 &resp->tfh, argp->tname, argp->tlen);
406 return rpc_success;
407 }
408
409 static __be32
nfsd3_proc_link(struct svc_rqst * rqstp)410 nfsd3_proc_link(struct svc_rqst *rqstp)
411 {
412 struct nfsd3_linkargs *argp = rqstp->rq_argp;
413 struct nfsd3_linkres *resp = rqstp->rq_resp;
414
415 dprintk("nfsd: LINK(3) %s ->\n",
416 SVCFH_fmt(&argp->ffh));
417 dprintk("nfsd: -> %s %.*s\n",
418 SVCFH_fmt(&argp->tfh),
419 argp->tlen,
420 argp->tname);
421
422 fh_copy(&resp->fh, &argp->ffh);
423 fh_copy(&resp->tfh, &argp->tfh);
424 resp->status = nfsd_link(rqstp, &resp->tfh, argp->tname, argp->tlen,
425 &resp->fh);
426 return rpc_success;
427 }
428
429 /*
430 * Read a portion of a directory.
431 */
432 static __be32
nfsd3_proc_readdir(struct svc_rqst * rqstp)433 nfsd3_proc_readdir(struct svc_rqst *rqstp)
434 {
435 struct nfsd3_readdirargs *argp = rqstp->rq_argp;
436 struct nfsd3_readdirres *resp = rqstp->rq_resp;
437 int count = 0;
438 struct page **p;
439 caddr_t page_addr = NULL;
440
441 dprintk("nfsd: READDIR(3) %s %d bytes at %d\n",
442 SVCFH_fmt(&argp->fh),
443 argp->count, (u32) argp->cookie);
444
445 /* Make sure we've room for the NULL ptr & eof flag, and shrink to
446 * client read size */
447 count = (argp->count >> 2) - 2;
448
449 /* Read directory and encode entries on the fly */
450 fh_copy(&resp->fh, &argp->fh);
451
452 resp->buflen = count;
453 resp->common.err = nfs_ok;
454 resp->buffer = argp->buffer;
455 resp->rqstp = rqstp;
456 resp->status = nfsd_readdir(rqstp, &resp->fh, (loff_t *)&argp->cookie,
457 &resp->common, nfs3svc_encode_entry);
458 memcpy(resp->verf, argp->verf, 8);
459 count = 0;
460 for (p = rqstp->rq_respages + 1; p < rqstp->rq_next_page; p++) {
461 page_addr = page_address(*p);
462
463 if (((caddr_t)resp->buffer >= page_addr) &&
464 ((caddr_t)resp->buffer < page_addr + PAGE_SIZE)) {
465 count += (caddr_t)resp->buffer - page_addr;
466 break;
467 }
468 count += PAGE_SIZE;
469 }
470 resp->count = count >> 2;
471 if (resp->offset) {
472 loff_t offset = argp->cookie;
473
474 if (unlikely(resp->offset1)) {
475 /* we ended up with offset on a page boundary */
476 *resp->offset = htonl(offset >> 32);
477 *resp->offset1 = htonl(offset & 0xffffffff);
478 resp->offset1 = NULL;
479 } else {
480 xdr_encode_hyper(resp->offset, offset);
481 }
482 resp->offset = NULL;
483 }
484
485 return rpc_success;
486 }
487
488 /*
489 * Read a portion of a directory, including file handles and attrs.
490 * For now, we choose to ignore the dircount parameter.
491 */
492 static __be32
nfsd3_proc_readdirplus(struct svc_rqst * rqstp)493 nfsd3_proc_readdirplus(struct svc_rqst *rqstp)
494 {
495 struct nfsd3_readdirargs *argp = rqstp->rq_argp;
496 struct nfsd3_readdirres *resp = rqstp->rq_resp;
497 int count = 0;
498 loff_t offset;
499 struct page **p;
500 caddr_t page_addr = NULL;
501
502 dprintk("nfsd: READDIR+(3) %s %d bytes at %d\n",
503 SVCFH_fmt(&argp->fh),
504 argp->count, (u32) argp->cookie);
505
506 /* Convert byte count to number of words (i.e. >> 2),
507 * and reserve room for the NULL ptr & eof flag (-2 words) */
508 resp->count = (argp->count >> 2) - 2;
509
510 /* Read directory and encode entries on the fly */
511 fh_copy(&resp->fh, &argp->fh);
512
513 resp->common.err = nfs_ok;
514 resp->buffer = argp->buffer;
515 resp->buflen = resp->count;
516 resp->rqstp = rqstp;
517 offset = argp->cookie;
518
519 resp->status = fh_verify(rqstp, &resp->fh, S_IFDIR, NFSD_MAY_NOP);
520 if (resp->status != nfs_ok)
521 goto out;
522
523 if (resp->fh.fh_export->ex_flags & NFSEXP_NOREADDIRPLUS) {
524 resp->status = nfserr_notsupp;
525 goto out;
526 }
527
528 resp->status = nfsd_readdir(rqstp, &resp->fh, &offset,
529 &resp->common, nfs3svc_encode_entry_plus);
530 memcpy(resp->verf, argp->verf, 8);
531 for (p = rqstp->rq_respages + 1; p < rqstp->rq_next_page; p++) {
532 page_addr = page_address(*p);
533
534 if (((caddr_t)resp->buffer >= page_addr) &&
535 ((caddr_t)resp->buffer < page_addr + PAGE_SIZE)) {
536 count += (caddr_t)resp->buffer - page_addr;
537 break;
538 }
539 count += PAGE_SIZE;
540 }
541 resp->count = count >> 2;
542 if (resp->offset) {
543 if (unlikely(resp->offset1)) {
544 /* we ended up with offset on a page boundary */
545 *resp->offset = htonl(offset >> 32);
546 *resp->offset1 = htonl(offset & 0xffffffff);
547 resp->offset1 = NULL;
548 } else {
549 xdr_encode_hyper(resp->offset, offset);
550 }
551 resp->offset = NULL;
552 }
553
554 out:
555 return rpc_success;
556 }
557
558 /*
559 * Get file system stats
560 */
561 static __be32
nfsd3_proc_fsstat(struct svc_rqst * rqstp)562 nfsd3_proc_fsstat(struct svc_rqst *rqstp)
563 {
564 struct nfsd_fhandle *argp = rqstp->rq_argp;
565 struct nfsd3_fsstatres *resp = rqstp->rq_resp;
566
567 dprintk("nfsd: FSSTAT(3) %s\n",
568 SVCFH_fmt(&argp->fh));
569
570 resp->status = nfsd_statfs(rqstp, &argp->fh, &resp->stats, 0);
571 fh_put(&argp->fh);
572 return rpc_success;
573 }
574
575 /*
576 * Get file system info
577 */
578 static __be32
nfsd3_proc_fsinfo(struct svc_rqst * rqstp)579 nfsd3_proc_fsinfo(struct svc_rqst *rqstp)
580 {
581 struct nfsd_fhandle *argp = rqstp->rq_argp;
582 struct nfsd3_fsinfores *resp = rqstp->rq_resp;
583 u32 max_blocksize = svc_max_payload(rqstp);
584
585 dprintk("nfsd: FSINFO(3) %s\n",
586 SVCFH_fmt(&argp->fh));
587
588 resp->f_rtmax = max_blocksize;
589 resp->f_rtpref = max_blocksize;
590 resp->f_rtmult = PAGE_SIZE;
591 resp->f_wtmax = max_blocksize;
592 resp->f_wtpref = max_blocksize;
593 resp->f_wtmult = PAGE_SIZE;
594 resp->f_dtpref = max_blocksize;
595 resp->f_maxfilesize = ~(u32) 0;
596 resp->f_properties = NFS3_FSF_DEFAULT;
597
598 resp->status = fh_verify(rqstp, &argp->fh, 0,
599 NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT);
600
601 /* Check special features of the file system. May request
602 * different read/write sizes for file systems known to have
603 * problems with large blocks */
604 if (resp->status == nfs_ok) {
605 struct super_block *sb = argp->fh.fh_dentry->d_sb;
606
607 /* Note that we don't care for remote fs's here */
608 if (sb->s_magic == MSDOS_SUPER_MAGIC) {
609 resp->f_properties = NFS3_FSF_BILLYBOY;
610 }
611 resp->f_maxfilesize = sb->s_maxbytes;
612 }
613
614 fh_put(&argp->fh);
615 return rpc_success;
616 }
617
618 /*
619 * Get pathconf info for the specified file
620 */
621 static __be32
nfsd3_proc_pathconf(struct svc_rqst * rqstp)622 nfsd3_proc_pathconf(struct svc_rqst *rqstp)
623 {
624 struct nfsd_fhandle *argp = rqstp->rq_argp;
625 struct nfsd3_pathconfres *resp = rqstp->rq_resp;
626
627 dprintk("nfsd: PATHCONF(3) %s\n",
628 SVCFH_fmt(&argp->fh));
629
630 /* Set default pathconf */
631 resp->p_link_max = 255; /* at least */
632 resp->p_name_max = 255; /* at least */
633 resp->p_no_trunc = 0;
634 resp->p_chown_restricted = 1;
635 resp->p_case_insensitive = 0;
636 resp->p_case_preserving = 1;
637
638 resp->status = fh_verify(rqstp, &argp->fh, 0, NFSD_MAY_NOP);
639
640 if (resp->status == nfs_ok) {
641 struct super_block *sb = argp->fh.fh_dentry->d_sb;
642
643 /* Note that we don't care for remote fs's here */
644 switch (sb->s_magic) {
645 case EXT2_SUPER_MAGIC:
646 resp->p_link_max = EXT2_LINK_MAX;
647 resp->p_name_max = EXT2_NAME_LEN;
648 break;
649 case MSDOS_SUPER_MAGIC:
650 resp->p_case_insensitive = 1;
651 resp->p_case_preserving = 0;
652 break;
653 }
654 }
655
656 fh_put(&argp->fh);
657 return rpc_success;
658 }
659
660 /*
661 * Commit a file (range) to stable storage.
662 */
663 static __be32
nfsd3_proc_commit(struct svc_rqst * rqstp)664 nfsd3_proc_commit(struct svc_rqst *rqstp)
665 {
666 struct nfsd3_commitargs *argp = rqstp->rq_argp;
667 struct nfsd3_commitres *resp = rqstp->rq_resp;
668
669 dprintk("nfsd: COMMIT(3) %s %u@%Lu\n",
670 SVCFH_fmt(&argp->fh),
671 argp->count,
672 (unsigned long long) argp->offset);
673
674 if (argp->offset > NFS_OFFSET_MAX) {
675 resp->status = nfserr_inval;
676 goto out;
677 }
678
679 fh_copy(&resp->fh, &argp->fh);
680 resp->status = nfsd_commit(rqstp, &resp->fh, argp->offset,
681 argp->count, resp->verf);
682 out:
683 return rpc_success;
684 }
685
686
687 /*
688 * NFSv3 Server procedures.
689 * Only the results of non-idempotent operations are cached.
690 */
691 #define nfs3svc_decode_fhandleargs nfs3svc_decode_fhandle
692 #define nfs3svc_encode_attrstatres nfs3svc_encode_attrstat
693 #define nfs3svc_encode_wccstatres nfs3svc_encode_wccstat
694 #define nfsd3_mkdirargs nfsd3_createargs
695 #define nfsd3_readdirplusargs nfsd3_readdirargs
696 #define nfsd3_fhandleargs nfsd_fhandle
697 #define nfsd3_fhandleres nfsd3_attrstat
698 #define nfsd3_attrstatres nfsd3_attrstat
699 #define nfsd3_wccstatres nfsd3_attrstat
700 #define nfsd3_createres nfsd3_diropres
701 #define nfsd3_voidres nfsd3_voidargs
702 struct nfsd3_voidargs { int dummy; };
703
704 #define ST 1 /* status*/
705 #define FH 17 /* filehandle with length */
706 #define AT 21 /* attributes */
707 #define pAT (1+AT) /* post attributes - conditional */
708 #define WC (7+pAT) /* WCC attributes */
709
710 static const struct svc_procedure nfsd_procedures3[22] = {
711 [NFS3PROC_NULL] = {
712 .pc_func = nfsd3_proc_null,
713 .pc_decode = nfs3svc_decode_voidarg,
714 .pc_encode = nfs3svc_encode_voidres,
715 .pc_argsize = sizeof(struct nfsd3_voidargs),
716 .pc_ressize = sizeof(struct nfsd3_voidres),
717 .pc_cachetype = RC_NOCACHE,
718 .pc_xdrressize = ST,
719 },
720 [NFS3PROC_GETATTR] = {
721 .pc_func = nfsd3_proc_getattr,
722 .pc_decode = nfs3svc_decode_fhandleargs,
723 .pc_encode = nfs3svc_encode_attrstatres,
724 .pc_release = nfs3svc_release_fhandle,
725 .pc_argsize = sizeof(struct nfsd3_fhandleargs),
726 .pc_ressize = sizeof(struct nfsd3_attrstatres),
727 .pc_cachetype = RC_NOCACHE,
728 .pc_xdrressize = ST+AT,
729 },
730 [NFS3PROC_SETATTR] = {
731 .pc_func = nfsd3_proc_setattr,
732 .pc_decode = nfs3svc_decode_sattrargs,
733 .pc_encode = nfs3svc_encode_wccstatres,
734 .pc_release = nfs3svc_release_fhandle,
735 .pc_argsize = sizeof(struct nfsd3_sattrargs),
736 .pc_ressize = sizeof(struct nfsd3_wccstatres),
737 .pc_cachetype = RC_REPLBUFF,
738 .pc_xdrressize = ST+WC,
739 },
740 [NFS3PROC_LOOKUP] = {
741 .pc_func = nfsd3_proc_lookup,
742 .pc_decode = nfs3svc_decode_diropargs,
743 .pc_encode = nfs3svc_encode_diropres,
744 .pc_release = nfs3svc_release_fhandle2,
745 .pc_argsize = sizeof(struct nfsd3_diropargs),
746 .pc_ressize = sizeof(struct nfsd3_diropres),
747 .pc_cachetype = RC_NOCACHE,
748 .pc_xdrressize = ST+FH+pAT+pAT,
749 },
750 [NFS3PROC_ACCESS] = {
751 .pc_func = nfsd3_proc_access,
752 .pc_decode = nfs3svc_decode_accessargs,
753 .pc_encode = nfs3svc_encode_accessres,
754 .pc_release = nfs3svc_release_fhandle,
755 .pc_argsize = sizeof(struct nfsd3_accessargs),
756 .pc_ressize = sizeof(struct nfsd3_accessres),
757 .pc_cachetype = RC_NOCACHE,
758 .pc_xdrressize = ST+pAT+1,
759 },
760 [NFS3PROC_READLINK] = {
761 .pc_func = nfsd3_proc_readlink,
762 .pc_decode = nfs3svc_decode_readlinkargs,
763 .pc_encode = nfs3svc_encode_readlinkres,
764 .pc_release = nfs3svc_release_fhandle,
765 .pc_argsize = sizeof(struct nfsd3_readlinkargs),
766 .pc_ressize = sizeof(struct nfsd3_readlinkres),
767 .pc_cachetype = RC_NOCACHE,
768 .pc_xdrressize = ST+pAT+1+NFS3_MAXPATHLEN/4,
769 },
770 [NFS3PROC_READ] = {
771 .pc_func = nfsd3_proc_read,
772 .pc_decode = nfs3svc_decode_readargs,
773 .pc_encode = nfs3svc_encode_readres,
774 .pc_release = nfs3svc_release_fhandle,
775 .pc_argsize = sizeof(struct nfsd3_readargs),
776 .pc_ressize = sizeof(struct nfsd3_readres),
777 .pc_cachetype = RC_NOCACHE,
778 .pc_xdrressize = ST+pAT+4+NFSSVC_MAXBLKSIZE/4,
779 },
780 [NFS3PROC_WRITE] = {
781 .pc_func = nfsd3_proc_write,
782 .pc_decode = nfs3svc_decode_writeargs,
783 .pc_encode = nfs3svc_encode_writeres,
784 .pc_release = nfs3svc_release_fhandle,
785 .pc_argsize = sizeof(struct nfsd3_writeargs),
786 .pc_ressize = sizeof(struct nfsd3_writeres),
787 .pc_cachetype = RC_REPLBUFF,
788 .pc_xdrressize = ST+WC+4,
789 },
790 [NFS3PROC_CREATE] = {
791 .pc_func = nfsd3_proc_create,
792 .pc_decode = nfs3svc_decode_createargs,
793 .pc_encode = nfs3svc_encode_createres,
794 .pc_release = nfs3svc_release_fhandle2,
795 .pc_argsize = sizeof(struct nfsd3_createargs),
796 .pc_ressize = sizeof(struct nfsd3_createres),
797 .pc_cachetype = RC_REPLBUFF,
798 .pc_xdrressize = ST+(1+FH+pAT)+WC,
799 },
800 [NFS3PROC_MKDIR] = {
801 .pc_func = nfsd3_proc_mkdir,
802 .pc_decode = nfs3svc_decode_mkdirargs,
803 .pc_encode = nfs3svc_encode_createres,
804 .pc_release = nfs3svc_release_fhandle2,
805 .pc_argsize = sizeof(struct nfsd3_mkdirargs),
806 .pc_ressize = sizeof(struct nfsd3_createres),
807 .pc_cachetype = RC_REPLBUFF,
808 .pc_xdrressize = ST+(1+FH+pAT)+WC,
809 },
810 [NFS3PROC_SYMLINK] = {
811 .pc_func = nfsd3_proc_symlink,
812 .pc_decode = nfs3svc_decode_symlinkargs,
813 .pc_encode = nfs3svc_encode_createres,
814 .pc_release = nfs3svc_release_fhandle2,
815 .pc_argsize = sizeof(struct nfsd3_symlinkargs),
816 .pc_ressize = sizeof(struct nfsd3_createres),
817 .pc_cachetype = RC_REPLBUFF,
818 .pc_xdrressize = ST+(1+FH+pAT)+WC,
819 },
820 [NFS3PROC_MKNOD] = {
821 .pc_func = nfsd3_proc_mknod,
822 .pc_decode = nfs3svc_decode_mknodargs,
823 .pc_encode = nfs3svc_encode_createres,
824 .pc_release = nfs3svc_release_fhandle2,
825 .pc_argsize = sizeof(struct nfsd3_mknodargs),
826 .pc_ressize = sizeof(struct nfsd3_createres),
827 .pc_cachetype = RC_REPLBUFF,
828 .pc_xdrressize = ST+(1+FH+pAT)+WC,
829 },
830 [NFS3PROC_REMOVE] = {
831 .pc_func = nfsd3_proc_remove,
832 .pc_decode = nfs3svc_decode_diropargs,
833 .pc_encode = nfs3svc_encode_wccstatres,
834 .pc_release = nfs3svc_release_fhandle,
835 .pc_argsize = sizeof(struct nfsd3_diropargs),
836 .pc_ressize = sizeof(struct nfsd3_wccstatres),
837 .pc_cachetype = RC_REPLBUFF,
838 .pc_xdrressize = ST+WC,
839 },
840 [NFS3PROC_RMDIR] = {
841 .pc_func = nfsd3_proc_rmdir,
842 .pc_decode = nfs3svc_decode_diropargs,
843 .pc_encode = nfs3svc_encode_wccstatres,
844 .pc_release = nfs3svc_release_fhandle,
845 .pc_argsize = sizeof(struct nfsd3_diropargs),
846 .pc_ressize = sizeof(struct nfsd3_wccstatres),
847 .pc_cachetype = RC_REPLBUFF,
848 .pc_xdrressize = ST+WC,
849 },
850 [NFS3PROC_RENAME] = {
851 .pc_func = nfsd3_proc_rename,
852 .pc_decode = nfs3svc_decode_renameargs,
853 .pc_encode = nfs3svc_encode_renameres,
854 .pc_release = nfs3svc_release_fhandle2,
855 .pc_argsize = sizeof(struct nfsd3_renameargs),
856 .pc_ressize = sizeof(struct nfsd3_renameres),
857 .pc_cachetype = RC_REPLBUFF,
858 .pc_xdrressize = ST+WC+WC,
859 },
860 [NFS3PROC_LINK] = {
861 .pc_func = nfsd3_proc_link,
862 .pc_decode = nfs3svc_decode_linkargs,
863 .pc_encode = nfs3svc_encode_linkres,
864 .pc_release = nfs3svc_release_fhandle2,
865 .pc_argsize = sizeof(struct nfsd3_linkargs),
866 .pc_ressize = sizeof(struct nfsd3_linkres),
867 .pc_cachetype = RC_REPLBUFF,
868 .pc_xdrressize = ST+pAT+WC,
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 },
879 [NFS3PROC_READDIRPLUS] = {
880 .pc_func = nfsd3_proc_readdirplus,
881 .pc_decode = nfs3svc_decode_readdirplusargs,
882 .pc_encode = nfs3svc_encode_readdirres,
883 .pc_release = nfs3svc_release_fhandle,
884 .pc_argsize = sizeof(struct nfsd3_readdirplusargs),
885 .pc_ressize = sizeof(struct nfsd3_readdirres),
886 .pc_cachetype = RC_NOCACHE,
887 },
888 [NFS3PROC_FSSTAT] = {
889 .pc_func = nfsd3_proc_fsstat,
890 .pc_decode = nfs3svc_decode_fhandleargs,
891 .pc_encode = nfs3svc_encode_fsstatres,
892 .pc_argsize = sizeof(struct nfsd3_fhandleargs),
893 .pc_ressize = sizeof(struct nfsd3_fsstatres),
894 .pc_cachetype = RC_NOCACHE,
895 .pc_xdrressize = ST+pAT+2*6+1,
896 },
897 [NFS3PROC_FSINFO] = {
898 .pc_func = nfsd3_proc_fsinfo,
899 .pc_decode = nfs3svc_decode_fhandleargs,
900 .pc_encode = nfs3svc_encode_fsinfores,
901 .pc_argsize = sizeof(struct nfsd3_fhandleargs),
902 .pc_ressize = sizeof(struct nfsd3_fsinfores),
903 .pc_cachetype = RC_NOCACHE,
904 .pc_xdrressize = ST+pAT+12,
905 },
906 [NFS3PROC_PATHCONF] = {
907 .pc_func = nfsd3_proc_pathconf,
908 .pc_decode = nfs3svc_decode_fhandleargs,
909 .pc_encode = nfs3svc_encode_pathconfres,
910 .pc_argsize = sizeof(struct nfsd3_fhandleargs),
911 .pc_ressize = sizeof(struct nfsd3_pathconfres),
912 .pc_cachetype = RC_NOCACHE,
913 .pc_xdrressize = ST+pAT+6,
914 },
915 [NFS3PROC_COMMIT] = {
916 .pc_func = nfsd3_proc_commit,
917 .pc_decode = nfs3svc_decode_commitargs,
918 .pc_encode = nfs3svc_encode_commitres,
919 .pc_release = nfs3svc_release_fhandle,
920 .pc_argsize = sizeof(struct nfsd3_commitargs),
921 .pc_ressize = sizeof(struct nfsd3_commitres),
922 .pc_cachetype = RC_NOCACHE,
923 .pc_xdrressize = ST+WC+2,
924 },
925 };
926
927 static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures3)];
928 const struct svc_version nfsd_version3 = {
929 .vs_vers = 3,
930 .vs_nproc = 22,
931 .vs_proc = nfsd_procedures3,
932 .vs_dispatch = nfsd_dispatch,
933 .vs_count = nfsd_count3,
934 .vs_xdrsize = NFS3_SVC_XDRSIZE,
935 };
936