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Merge branch 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
[linux-2.6-block.git] / fs / nfsd / nfs3proc.c
CommitLineData
1da177e4 1/*
1da177e4
LT		 2 * Process version 3 NFS requests.
3 *
4 * Copyright (C) 1996, 1997, 1998 Olaf Kirch <okir@monad.swb.de>
5 */
6
1da177e4
LT		 7#include <linux/fs.h>
8#include <linux/ext2_fs.h>
12214cb7 9#include <linux/magic.h>
1da177e4 10
9a74af21
BH		 11#include "cache.h"
12#include "xdr3.h"
0a3adade 13#include "vfs.h"
1da177e4
LT		 14
15#define NFSDDBG_FACILITY NFSDDBG_PROC
16
17#define RETURN_STATUS(st) { resp->status = (st); return (st); }
18
19static int nfs3_ftypes[] = {
20 0, /* NF3NON */
21 S_IFREG, /* NF3REG */
22 S_IFDIR, /* NF3DIR */
23 S_IFBLK, /* NF3BLK */
24 S_IFCHR, /* NF3CHR */
25 S_IFLNK, /* NF3LNK */
26 S_IFSOCK, /* NF3SOCK */
27 S_IFIFO, /* NF3FIFO */
28};
29
30/*
31 * NULL call.
32 */
7111c66e 33static __be32
1da177e4
LT		 34nfsd3_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
35{
36 return nfs_ok;
37}
38
39/*
40 * Get a file's attributes
41 */
7111c66e 42static __be32
1da177e4
LT		 43nfsd3_proc_getattr(struct svc_rqst *rqstp, struct nfsd_fhandle *argp,
44 struct nfsd3_attrstat *resp)
45{
c4d987ba 46 __be32 nfserr;
1da177e4
LT		 47
48 dprintk("nfsd: GETATTR(3) %s\n",
a334de28 49 SVCFH_fmt(&argp->fh));
1da177e4
LT		 50
51 fh_copy(&resp->fh, &argp->fh);
04716e66
BF		 52 nfserr = fh_verify(rqstp, &resp->fh, 0,
53 NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT);
a334de28
DS		 54 if (nfserr)
55 RETURN_STATUS(nfserr);
56
3dadecce 57 nfserr = fh_getattr(&resp->fh, &resp->stat);
a334de28 58
1da177e4
LT		 59 RETURN_STATUS(nfserr);
60}
61
62/*
63 * Set a file's attributes
64 */
7111c66e 65static __be32
1da177e4
LT		 66nfsd3_proc_setattr(struct svc_rqst *rqstp, struct nfsd3_sattrargs *argp,
67 struct nfsd3_attrstat *resp)
68{
c4d987ba 69 __be32 nfserr;
1da177e4
LT		 70
71 dprintk("nfsd: SETATTR(3) %s\n",
72 SVCFH_fmt(&argp->fh));
73
74 fh_copy(&resp->fh, &argp->fh);
75 nfserr = nfsd_setattr(rqstp, &resp->fh, &argp->attrs,
76 argp->check_guard, argp->guardtime);
77 RETURN_STATUS(nfserr);
78}
79
80/*
81 * Look up a path name component
82 */
7111c66e 83static __be32
1da177e4
LT		 84nfsd3_proc_lookup(struct svc_rqst *rqstp, struct nfsd3_diropargs *argp,
85 struct nfsd3_diropres *resp)
86{
c4d987ba 87 __be32 nfserr;
1da177e4
LT		 88
89 dprintk("nfsd: LOOKUP(3) %s %.*s\n",
90 SVCFH_fmt(&argp->fh),
91 argp->len,
92 argp->name);
93
94 fh_copy(&resp->dirfh, &argp->fh);
95 fh_init(&resp->fh, NFS3_FHSIZE);
96
97 nfserr = nfsd_lookup(rqstp, &resp->dirfh,
98 argp->name,
99 argp->len,
100 &resp->fh);
101 RETURN_STATUS(nfserr);
102}
103
104/*
105 * Check file access
106 */
7111c66e 107static __be32
1da177e4
LT		 108nfsd3_proc_access(struct svc_rqst *rqstp, struct nfsd3_accessargs *argp,
109 struct nfsd3_accessres *resp)
110{
c4d987ba 111 __be32 nfserr;
1da177e4
LT		 112
113 dprintk("nfsd: ACCESS(3) %s 0x%x\n",
114 SVCFH_fmt(&argp->fh),
115 argp->access);
116
117 fh_copy(&resp->fh, &argp->fh);
118 resp->access = argp->access;
119 nfserr = nfsd_access(rqstp, &resp->fh, &resp->access, NULL);
120 RETURN_STATUS(nfserr);
121}
122
123/*
124 * Read a symlink.
125 */
7111c66e 126static __be32
1da177e4
LT		 127nfsd3_proc_readlink(struct svc_rqst *rqstp, struct nfsd3_readlinkargs *argp,
128 struct nfsd3_readlinkres *resp)
129{
c4d987ba 130 __be32 nfserr;
1da177e4
LT		 131
132 dprintk("nfsd: READLINK(3) %s\n", SVCFH_fmt(&argp->fh));
133
134 /* Read the symlink. */
135 fh_copy(&resp->fh, &argp->fh);
136 resp->len = NFS3_MAXPATHLEN;
137 nfserr = nfsd_readlink(rqstp, &resp->fh, argp->buffer, &resp->len);
138 RETURN_STATUS(nfserr);
139}
140
141/*
142 * Read a portion of a file.
143 */
7111c66e 144static __be32
1da177e4
LT		 145nfsd3_proc_read(struct svc_rqst *rqstp, struct nfsd3_readargs *argp,
146 struct nfsd3_readres *resp)
147{
c4d987ba 148 __be32 nfserr;
7adae489 149 u32 max_blocksize = svc_max_payload(rqstp);
1da177e4 150
18b631f8 151 dprintk("nfsd: READ(3) %s %lu bytes at %Lu\n",
1da177e4
LT		 152 SVCFH_fmt(&argp->fh),
153 (unsigned long) argp->count,
18b631f8 154 (unsigned long long) argp->offset);
1da177e4
LT		 155
156 /* Obtain buffer pointer for payload.
157 * 1 (status) + 22 (post_op_attr) + 1 (count) + 1 (eof)
158 * + 1 (xdr opaque byte count) = 26
159 */
3c7aa15d 160 resp->count = min(argp->count, max_blocksize);
cd123012 161 svc_reserve_auth(rqstp, ((1 + NFS3_POST_OP_ATTR_WORDS + 3)<<2) + resp->count +4);
1da177e4
LT		 162
163 fh_copy(&resp->fh, &argp->fh);
039a87ca 164 nfserr = nfsd_read(rqstp, &resp->fh,
1da177e4 165 argp->offset,
3cc03b16 166 rqstp->rq_vec, argp->vlen,
1da177e4
LT		 167 &resp->count);
168 if (nfserr == 0) {
2b0143b5 169 struct inode *inode = d_inode(resp->fh.fh_dentry);
1da177e4
LT		 170
171 resp->eof = (argp->offset + resp->count) >= inode->i_size;
172 }
173
174 RETURN_STATUS(nfserr);
175}
176
177/*
178 * Write data to a file
179 */
7111c66e 180static __be32
1da177e4
LT		 181nfsd3_proc_write(struct svc_rqst *rqstp, struct nfsd3_writeargs *argp,
182 struct nfsd3_writeres *resp)
183{
c4d987ba 184 __be32 nfserr;
31dec253 185 unsigned long cnt = argp->len;
1da177e4 186
18b631f8 187 dprintk("nfsd: WRITE(3) %s %d bytes at %Lu%s\n",
1da177e4
LT		 188 SVCFH_fmt(&argp->fh),
189 argp->len,
18b631f8 190 (unsigned long long) argp->offset,
1da177e4
LT		 191 argp->stable? " stable" : "");
192
193 fh_copy(&resp->fh, &argp->fh);
194 resp->committed = argp->stable;
195 nfserr = nfsd_write(rqstp, &resp->fh, NULL,
196 argp->offset,
3cc03b16 197 rqstp->rq_vec, argp->vlen,
31dec253 198 &cnt,
1da177e4 199 &resp->committed);
31dec253 200 resp->count = cnt;
1da177e4
LT		 201 RETURN_STATUS(nfserr);
202}
203
204/*
205 * With NFSv3, CREATE processing is a lot easier than with NFSv2.
206 * At least in theory; we'll see how it fares in practice when the
207 * first reports about SunOS compatibility problems start to pour in...
208 */
7111c66e 209static __be32
1da177e4
LT		 210nfsd3_proc_create(struct svc_rqst *rqstp, struct nfsd3_createargs *argp,
211 struct nfsd3_diropres *resp)
212{
213 svc_fh *dirfhp, *newfhp = NULL;
214 struct iattr *attr;
c4d987ba 215 __be32 nfserr;
1da177e4
LT		 216
217 dprintk("nfsd: CREATE(3) %s %.*s\n",
218 SVCFH_fmt(&argp->fh),
219 argp->len,
220 argp->name);
221
222 dirfhp = fh_copy(&resp->dirfh, &argp->fh);
223 newfhp = fh_init(&resp->fh, NFS3_FHSIZE);
224 attr = &argp->attrs;
225
1da177e4
LT		 226 /* Unfudge the mode bits */
227 attr->ia_mode &= ~S_IFMT;
228 if (!(attr->ia_valid & ATTR_MODE)) {
229 attr->ia_valid |= ATTR_MODE;
230 attr->ia_mode = S_IFREG;
231 } else {
232 attr->ia_mode = (attr->ia_mode & ~S_IFMT) | S_IFREG;
233 }
234
235 /* Now create the file and set attributes */
ac6721a1 236 nfserr = do_nfsd_create(rqstp, dirfhp, argp->name, argp->len,
1da177e4 237 attr, newfhp,
95c7a20a 238 argp->createmode, (u32 *)argp->verf, NULL, NULL);
1da177e4
LT		 239
240 RETURN_STATUS(nfserr);
241}
242
243/*
244 * Make directory. This operation is not idempotent.
245 */
7111c66e 246static __be32
1da177e4
LT		 247nfsd3_proc_mkdir(struct svc_rqst *rqstp, struct nfsd3_createargs *argp,
248 struct nfsd3_diropres *resp)
249{
c4d987ba 250 __be32 nfserr;
1da177e4
LT		 251
252 dprintk("nfsd: MKDIR(3) %s %.*s\n",
253 SVCFH_fmt(&argp->fh),
254 argp->len,
255 argp->name);
256
257 argp->attrs.ia_valid &= ~ATTR_SIZE;
258 fh_copy(&resp->dirfh, &argp->fh);
259 fh_init(&resp->fh, NFS3_FHSIZE);
260 nfserr = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len,
261 &argp->attrs, S_IFDIR, 0, &resp->fh);
43a9aa64 262 fh_unlock(&resp->dirfh);
1da177e4
LT		 263 RETURN_STATUS(nfserr);
264}
265
7111c66e 266static __be32
1da177e4
LT		 267nfsd3_proc_symlink(struct svc_rqst *rqstp, struct nfsd3_symlinkargs *argp,
268 struct nfsd3_diropres *resp)
269{
c4d987ba 270 __be32 nfserr;
1da177e4
LT		 271
272 dprintk("nfsd: SYMLINK(3) %s %.*s -> %.*s\n",
273 SVCFH_fmt(&argp->ffh),
274 argp->flen, argp->fname,
275 argp->tlen, argp->tname);
276
277 fh_copy(&resp->dirfh, &argp->ffh);
278 fh_init(&resp->fh, NFS3_FHSIZE);
279 nfserr = nfsd_symlink(rqstp, &resp->dirfh, argp->fname, argp->flen,
1e444f5b 280 argp->tname, &resp->fh);
1da177e4
LT		 281 RETURN_STATUS(nfserr);
282}
283
284/*
285 * Make socket/fifo/device.
286 */
7111c66e 287static __be32
1da177e4
LT		 288nfsd3_proc_mknod(struct svc_rqst *rqstp, struct nfsd3_mknodargs *argp,
289 struct nfsd3_diropres *resp)
290{
c4d987ba
AV		 291 __be32 nfserr;
292 int type;
1da177e4
LT		 293 dev_t rdev = 0;
294
295 dprintk("nfsd: MKNOD(3) %s %.*s\n",
296 SVCFH_fmt(&argp->fh),
297 argp->len,
298 argp->name);
299
300 fh_copy(&resp->dirfh, &argp->fh);
301 fh_init(&resp->fh, NFS3_FHSIZE);
302
303 if (argp->ftype == 0 || argp->ftype >= NF3BAD)
304 RETURN_STATUS(nfserr_inval);
305 if (argp->ftype == NF3CHR || argp->ftype == NF3BLK) {
306 rdev = MKDEV(argp->major, argp->minor);
307 if (MAJOR(rdev) != argp->major ||
308 MINOR(rdev) != argp->minor)
309 RETURN_STATUS(nfserr_inval);
310 } else
311 if (argp->ftype != NF3SOCK && argp->ftype != NF3FIFO)
312 RETURN_STATUS(nfserr_inval);
313
314 type = nfs3_ftypes[argp->ftype];
315 nfserr = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len,
316 &argp->attrs, type, rdev, &resp->fh);
43a9aa64 317 fh_unlock(&resp->dirfh);
1da177e4
LT		 318 RETURN_STATUS(nfserr);
319}
320
321/*
322 * Remove file/fifo/socket etc.
323 */
7111c66e 324static __be32
1da177e4
LT		 325nfsd3_proc_remove(struct svc_rqst *rqstp, struct nfsd3_diropargs *argp,
326 struct nfsd3_attrstat *resp)
327{
c4d987ba 328 __be32 nfserr;
1da177e4
LT		 329
330 dprintk("nfsd: REMOVE(3) %s %.*s\n",
331 SVCFH_fmt(&argp->fh),
332 argp->len,
333 argp->name);
334
335 /* Unlink. -S_IFDIR means file must not be a directory */
336 fh_copy(&resp->fh, &argp->fh);
337 nfserr = nfsd_unlink(rqstp, &resp->fh, -S_IFDIR, argp->name, argp->len);
43a9aa64 338 fh_unlock(&resp->fh);
1da177e4
LT		 339 RETURN_STATUS(nfserr);
340}
341
342/*
343 * Remove a directory
344 */
7111c66e 345static __be32
1da177e4
LT		 346nfsd3_proc_rmdir(struct svc_rqst *rqstp, struct nfsd3_diropargs *argp,
347 struct nfsd3_attrstat *resp)
348{
c4d987ba 349 __be32 nfserr;
1da177e4
LT		 350
351 dprintk("nfsd: RMDIR(3) %s %.*s\n",
352 SVCFH_fmt(&argp->fh),
353 argp->len,
354 argp->name);
355
356 fh_copy(&resp->fh, &argp->fh);
357 nfserr = nfsd_unlink(rqstp, &resp->fh, S_IFDIR, argp->name, argp->len);
43a9aa64 358 fh_unlock(&resp->fh);
1da177e4
LT		 359 RETURN_STATUS(nfserr);
360}
361
7111c66e 362static __be32
1da177e4
LT		 363nfsd3_proc_rename(struct svc_rqst *rqstp, struct nfsd3_renameargs *argp,
364 struct nfsd3_renameres *resp)
365{
c4d987ba 366 __be32 nfserr;
1da177e4
LT		 367
368 dprintk("nfsd: RENAME(3) %s %.*s ->\n",
369 SVCFH_fmt(&argp->ffh),
370 argp->flen,
371 argp->fname);
372 dprintk("nfsd: -> %s %.*s\n",
373 SVCFH_fmt(&argp->tfh),
374 argp->tlen,
375 argp->tname);
376
377 fh_copy(&resp->ffh, &argp->ffh);
378 fh_copy(&resp->tfh, &argp->tfh);
379 nfserr = nfsd_rename(rqstp, &resp->ffh, argp->fname, argp->flen,
380 &resp->tfh, argp->tname, argp->tlen);
381 RETURN_STATUS(nfserr);
382}
383
7111c66e 384static __be32
1da177e4
LT		 385nfsd3_proc_link(struct svc_rqst *rqstp, struct nfsd3_linkargs *argp,
386 struct nfsd3_linkres *resp)
387{
c4d987ba 388 __be32 nfserr;
1da177e4
LT		 389
390 dprintk("nfsd: LINK(3) %s ->\n",
391 SVCFH_fmt(&argp->ffh));
392 dprintk("nfsd: -> %s %.*s\n",
393 SVCFH_fmt(&argp->tfh),
394 argp->tlen,
395 argp->tname);
396
397 fh_copy(&resp->fh, &argp->ffh);
398 fh_copy(&resp->tfh, &argp->tfh);
399 nfserr = nfsd_link(rqstp, &resp->tfh, argp->tname, argp->tlen,
400 &resp->fh);
401 RETURN_STATUS(nfserr);
402}
403
404/*
405 * Read a portion of a directory.
406 */
7111c66e 407static __be32
1da177e4
LT		 408nfsd3_proc_readdir(struct svc_rqst *rqstp, struct nfsd3_readdirargs *argp,
409 struct nfsd3_readdirres *resp)
410{
c4d987ba
AV		 411 __be32 nfserr;
412 int count;
1da177e4
LT		 413
414 dprintk("nfsd: READDIR(3) %s %d bytes at %d\n",
415 SVCFH_fmt(&argp->fh),
416 argp->count, (u32) argp->cookie);
417
418 /* Make sure we've room for the NULL ptr & eof flag, and shrink to
419 * client read size */
420 count = (argp->count >> 2) - 2;
421
422 /* Read directory and encode entries on the fly */
423 fh_copy(&resp->fh, &argp->fh);
424
425 resp->buflen = count;
426 resp->common.err = nfs_ok;
427 resp->buffer = argp->buffer;
428 resp->rqstp = rqstp;
429 nfserr = nfsd_readdir(rqstp, &resp->fh, (loff_t*) &argp->cookie,
430 &resp->common, nfs3svc_encode_entry);
431 memcpy(resp->verf, argp->verf, 8);
432 resp->count = resp->buffer - argp->buffer;
433 if (resp->offset)
434 xdr_encode_hyper(resp->offset, argp->cookie);
435
436 RETURN_STATUS(nfserr);
437}
438
439/*
440 * Read a portion of a directory, including file handles and attrs.
441 * For now, we choose to ignore the dircount parameter.
442 */
7111c66e 443static __be32
1da177e4
LT		 444nfsd3_proc_readdirplus(struct svc_rqst *rqstp, struct nfsd3_readdirargs *argp,
445 struct nfsd3_readdirres *resp)
446{
c4d987ba
AV		 447 __be32 nfserr;
448 int count = 0;
1da177e4 449 loff_t offset;
afc59400 450 struct page **p;
1da177e4
LT		 451 caddr_t page_addr = NULL;
452
453 dprintk("nfsd: READDIR+(3) %s %d bytes at %d\n",
454 SVCFH_fmt(&argp->fh),
455 argp->count, (u32) argp->cookie);
456
457 /* Convert byte count to number of words (i.e. >> 2),
458 * and reserve room for the NULL ptr & eof flag (-2 words) */
459 resp->count = (argp->count >> 2) - 2;
460
461 /* Read directory and encode entries on the fly */
462 fh_copy(&resp->fh, &argp->fh);
463
464 resp->common.err = nfs_ok;
465 resp->buffer = argp->buffer;
466 resp->buflen = resp->count;
467 resp->rqstp = rqstp;
468 offset = argp->cookie;
18c01ab3
RG		 469
470 nfserr = fh_verify(rqstp, &resp->fh, S_IFDIR, NFSD_MAY_NOP);
471 if (nfserr)
472 RETURN_STATUS(nfserr);
473
474 if (resp->fh.fh_export->ex_flags & NFSEXP_NOREADDIRPLUS)
475 RETURN_STATUS(nfserr_notsupp);
476
1da177e4
LT		 477 nfserr = nfsd_readdir(rqstp, &resp->fh,
478 &offset,
479 &resp->common,
480 nfs3svc_encode_entry_plus);
481 memcpy(resp->verf, argp->verf, 8);
afc59400
BF		 482 for (p = rqstp->rq_respages + 1; p < rqstp->rq_next_page; p++) {
483 page_addr = page_address(*p);
1da177e4
LT		 484
485 if (((caddr_t)resp->buffer >= page_addr) &&
486 ((caddr_t)resp->buffer < page_addr + PAGE_SIZE)) {
487 count += (caddr_t)resp->buffer - page_addr;
488 break;
489 }
490 count += PAGE_SIZE;
491 }
492 resp->count = count >> 2;
493 if (resp->offset) {
494 if (unlikely(resp->offset1)) {
495 /* we ended up with offset on a page boundary */
496 *resp->offset = htonl(offset >> 32);
497 *resp->offset1 = htonl(offset & 0xffffffff);
498 resp->offset1 = NULL;
499 } else {
500 xdr_encode_hyper(resp->offset, offset);
501 }
502 }
503
504 RETURN_STATUS(nfserr);
505}
506
507/*
508 * Get file system stats
509 */
7111c66e 510static __be32
1da177e4
LT		 511nfsd3_proc_fsstat(struct svc_rqst * rqstp, struct nfsd_fhandle *argp,
512 struct nfsd3_fsstatres *resp)
513{
c4d987ba 514 __be32 nfserr;
1da177e4
LT		 515
516 dprintk("nfsd: FSSTAT(3) %s\n",
517 SVCFH_fmt(&argp->fh));
518
04716e66 519 nfserr = nfsd_statfs(rqstp, &argp->fh, &resp->stats, 0);
1da177e4
LT		 520 fh_put(&argp->fh);
521 RETURN_STATUS(nfserr);
522}
523
524/*
525 * Get file system info
526 */
7111c66e 527static __be32
1da177e4
LT		 528nfsd3_proc_fsinfo(struct svc_rqst * rqstp, struct nfsd_fhandle *argp,
529 struct nfsd3_fsinfores *resp)
530{
c4d987ba 531 __be32 nfserr;
7adae489 532 u32 max_blocksize = svc_max_payload(rqstp);
1da177e4
LT		 533
534 dprintk("nfsd: FSINFO(3) %s\n",
535 SVCFH_fmt(&argp->fh));
536
7adae489
GB		 537 resp->f_rtmax = max_blocksize;
538 resp->f_rtpref = max_blocksize;
1da177e4 539 resp->f_rtmult = PAGE_SIZE;
7adae489
GB		 540 resp->f_wtmax = max_blocksize;
541 resp->f_wtpref = max_blocksize;
1da177e4
LT		 542 resp->f_wtmult = PAGE_SIZE;
543 resp->f_dtpref = PAGE_SIZE;
544 resp->f_maxfilesize = ~(u32) 0;
545 resp->f_properties = NFS3_FSF_DEFAULT;
546
04716e66
BF		 547 nfserr = fh_verify(rqstp, &argp->fh, 0,
548 NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT);
1da177e4
LT		 549
550 /* Check special features of the file system. May request
551 * different read/write sizes for file systems known to have
552 * problems with large blocks */
553 if (nfserr == 0) {
2b0143b5 554 struct super_block *sb = d_inode(argp->fh.fh_dentry)->i_sb;
1da177e4
LT		 555
556 /* Note that we don't care for remote fs's here */
12214cb7 557 if (sb->s_magic == MSDOS_SUPER_MAGIC) {
1da177e4
LT		 558 resp->f_properties = NFS3_FSF_BILLYBOY;
559 }
560 resp->f_maxfilesize = sb->s_maxbytes;
561 }
562
563 fh_put(&argp->fh);
564 RETURN_STATUS(nfserr);
565}
566
567/*
568 * Get pathconf info for the specified file
569 */
7111c66e 570static __be32
1da177e4
LT		 571nfsd3_proc_pathconf(struct svc_rqst * rqstp, struct nfsd_fhandle *argp,
572 struct nfsd3_pathconfres *resp)
573{
c4d987ba 574 __be32 nfserr;
1da177e4
LT		 575
576 dprintk("nfsd: PATHCONF(3) %s\n",
577 SVCFH_fmt(&argp->fh));
578
579 /* Set default pathconf */
580 resp->p_link_max = 255; /* at least */
581 resp->p_name_max = 255; /* at least */
582 resp->p_no_trunc = 0;
583 resp->p_chown_restricted = 1;
584 resp->p_case_insensitive = 0;
585 resp->p_case_preserving = 1;
586
8837abca 587 nfserr = fh_verify(rqstp, &argp->fh, 0, NFSD_MAY_NOP);
1da177e4
LT		 588
589 if (nfserr == 0) {
2b0143b5 590 struct super_block *sb = d_inode(argp->fh.fh_dentry)->i_sb;
1da177e4
LT		 591
592 /* Note that we don't care for remote fs's here */
593 switch (sb->s_magic) {
594 case EXT2_SUPER_MAGIC:
595 resp->p_link_max = EXT2_LINK_MAX;
596 resp->p_name_max = EXT2_NAME_LEN;
597 break;
12214cb7 598 case MSDOS_SUPER_MAGIC:
1da177e4
LT		 599 resp->p_case_insensitive = 1;
600 resp->p_case_preserving = 0;
601 break;
602 }
603 }
604
605 fh_put(&argp->fh);
606 RETURN_STATUS(nfserr);
607}
608
609
610/*
611 * Commit a file (range) to stable storage.
612 */
7111c66e 613static __be32
1da177e4
LT		 614nfsd3_proc_commit(struct svc_rqst * rqstp, struct nfsd3_commitargs *argp,
615 struct nfsd3_commitres *resp)
616{
c4d987ba 617 __be32 nfserr;
1da177e4
LT		 618
619 dprintk("nfsd: COMMIT(3) %s %u@%Lu\n",
620 SVCFH_fmt(&argp->fh),
621 argp->count,
622 (unsigned long long) argp->offset);
623
624 if (argp->offset > NFS_OFFSET_MAX)
625 RETURN_STATUS(nfserr_inval);
626
627 fh_copy(&resp->fh, &argp->fh);
628 nfserr = nfsd_commit(rqstp, &resp->fh, argp->offset, argp->count);
629
630 RETURN_STATUS(nfserr);
631}
632
633
634/*
635 * NFSv3 Server procedures.
636 * Only the results of non-idempotent operations are cached.
637 */
1da177e4
LT		 638#define nfs3svc_decode_fhandleargs nfs3svc_decode_fhandle
639#define nfs3svc_encode_attrstatres nfs3svc_encode_attrstat
640#define nfs3svc_encode_wccstatres nfs3svc_encode_wccstat
641#define nfsd3_mkdirargs nfsd3_createargs
642#define nfsd3_readdirplusargs nfsd3_readdirargs
643#define nfsd3_fhandleargs nfsd_fhandle
644#define nfsd3_fhandleres nfsd3_attrstat
645#define nfsd3_attrstatres nfsd3_attrstat
646#define nfsd3_wccstatres nfsd3_attrstat
647#define nfsd3_createres nfsd3_diropres
648#define nfsd3_voidres nfsd3_voidargs
649struct nfsd3_voidargs { int dummy; };
650
651#define PROC(name, argt, rest, relt, cache, respsize) \
652 { (svc_procfunc) nfsd3_proc_##name, \
653 (kxdrproc_t) nfs3svc_decode_##argt##args, \
654 (kxdrproc_t) nfs3svc_encode_##rest##res, \
655 (kxdrproc_t) nfs3svc_release_##relt, \
656 sizeof(struct nfsd3_##argt##args), \
657 sizeof(struct nfsd3_##rest##res), \
658 0, \
659 cache, \
660 respsize, \
661 }
662
663#define ST 1 /* status*/
664#define FH 17 /* filehandle with length */
665#define AT 21 /* attributes */
666#define pAT (1+AT) /* post attributes - conditional */
667#define WC (7+pAT) /* WCC attributes */
668
669static struct svc_procedure nfsd_procedures3[22] = {
b9081d90
YZ		 670 [NFS3PROC_NULL] = {
671 .pc_func = (svc_procfunc) nfsd3_proc_null,
672 .pc_encode = (kxdrproc_t) nfs3svc_encode_voidres,
673 .pc_argsize = sizeof(struct nfsd3_voidargs),
674 .pc_ressize = sizeof(struct nfsd3_voidres),
675 .pc_cachetype = RC_NOCACHE,
676 .pc_xdrressize = ST,
677 },
678 [NFS3PROC_GETATTR] = {
679 .pc_func = (svc_procfunc) nfsd3_proc_getattr,
680 .pc_decode = (kxdrproc_t) nfs3svc_decode_fhandleargs,
681 .pc_encode = (kxdrproc_t) nfs3svc_encode_attrstatres,
682 .pc_release = (kxdrproc_t) nfs3svc_release_fhandle,
683 .pc_argsize = sizeof(struct nfsd3_fhandleargs),
684 .pc_ressize = sizeof(struct nfsd3_attrstatres),
685 .pc_cachetype = RC_NOCACHE,
686 .pc_xdrressize = ST+AT,
687 },
688 [NFS3PROC_SETATTR] = {
689 .pc_func = (svc_procfunc) nfsd3_proc_setattr,
690 .pc_decode = (kxdrproc_t) nfs3svc_decode_sattrargs,
691 .pc_encode = (kxdrproc_t) nfs3svc_encode_wccstatres,
692 .pc_release = (kxdrproc_t) nfs3svc_release_fhandle,
693 .pc_argsize = sizeof(struct nfsd3_sattrargs),
694 .pc_ressize = sizeof(struct nfsd3_wccstatres),
695 .pc_cachetype = RC_REPLBUFF,
696 .pc_xdrressize = ST+WC,
697 },
698 [NFS3PROC_LOOKUP] = {
699 .pc_func = (svc_procfunc) nfsd3_proc_lookup,
700 .pc_decode = (kxdrproc_t) nfs3svc_decode_diropargs,
701 .pc_encode = (kxdrproc_t) nfs3svc_encode_diropres,
702 .pc_release = (kxdrproc_t) nfs3svc_release_fhandle2,
703 .pc_argsize = sizeof(struct nfsd3_diropargs),
704 .pc_ressize = sizeof(struct nfsd3_diropres),
705 .pc_cachetype = RC_NOCACHE,
706 .pc_xdrressize = ST+FH+pAT+pAT,
707 },
708 [NFS3PROC_ACCESS] = {
709 .pc_func = (svc_procfunc) nfsd3_proc_access,
710 .pc_decode = (kxdrproc_t) nfs3svc_decode_accessargs,
711 .pc_encode = (kxdrproc_t) nfs3svc_encode_accessres,
712 .pc_release = (kxdrproc_t) nfs3svc_release_fhandle,
713 .pc_argsize = sizeof(struct nfsd3_accessargs),
714 .pc_ressize = sizeof(struct nfsd3_accessres),
715 .pc_cachetype = RC_NOCACHE,
716 .pc_xdrressize = ST+pAT+1,
717 },
718 [NFS3PROC_READLINK] = {
719 .pc_func = (svc_procfunc) nfsd3_proc_readlink,
720 .pc_decode = (kxdrproc_t) nfs3svc_decode_readlinkargs,
721 .pc_encode = (kxdrproc_t) nfs3svc_encode_readlinkres,
722 .pc_release = (kxdrproc_t) nfs3svc_release_fhandle,
723 .pc_argsize = sizeof(struct nfsd3_readlinkargs),
724 .pc_ressize = sizeof(struct nfsd3_readlinkres),
725 .pc_cachetype = RC_NOCACHE,
726 .pc_xdrressize = ST+pAT+1+NFS3_MAXPATHLEN/4,
727 },
728 [NFS3PROC_READ] = {
729 .pc_func = (svc_procfunc) nfsd3_proc_read,
730 .pc_decode = (kxdrproc_t) nfs3svc_decode_readargs,
731 .pc_encode = (kxdrproc_t) nfs3svc_encode_readres,
732 .pc_release = (kxdrproc_t) nfs3svc_release_fhandle,
733 .pc_argsize = sizeof(struct nfsd3_readargs),
734 .pc_ressize = sizeof(struct nfsd3_readres),
735 .pc_cachetype = RC_NOCACHE,
736 .pc_xdrressize = ST+pAT+4+NFSSVC_MAXBLKSIZE/4,
737 },
738 [NFS3PROC_WRITE] = {
739 .pc_func = (svc_procfunc) nfsd3_proc_write,
740 .pc_decode = (kxdrproc_t) nfs3svc_decode_writeargs,
741 .pc_encode = (kxdrproc_t) nfs3svc_encode_writeres,
742 .pc_release = (kxdrproc_t) nfs3svc_release_fhandle,
743 .pc_argsize = sizeof(struct nfsd3_writeargs),
744 .pc_ressize = sizeof(struct nfsd3_writeres),
745 .pc_cachetype = RC_REPLBUFF,
746 .pc_xdrressize = ST+WC+4,
747 },
748 [NFS3PROC_CREATE] = {
749 .pc_func = (svc_procfunc) nfsd3_proc_create,
750 .pc_decode = (kxdrproc_t) nfs3svc_decode_createargs,
751 .pc_encode = (kxdrproc_t) nfs3svc_encode_createres,
752 .pc_release = (kxdrproc_t) nfs3svc_release_fhandle2,
753 .pc_argsize = sizeof(struct nfsd3_createargs),
754 .pc_ressize = sizeof(struct nfsd3_createres),
755 .pc_cachetype = RC_REPLBUFF,
756 .pc_xdrressize = ST+(1+FH+pAT)+WC,
757 },
758 [NFS3PROC_MKDIR] = {
759 .pc_func = (svc_procfunc) nfsd3_proc_mkdir,
760 .pc_decode = (kxdrproc_t) nfs3svc_decode_mkdirargs,
761 .pc_encode = (kxdrproc_t) nfs3svc_encode_createres,
762 .pc_release = (kxdrproc_t) nfs3svc_release_fhandle2,
763 .pc_argsize = sizeof(struct nfsd3_mkdirargs),
764 .pc_ressize = sizeof(struct nfsd3_createres),
765 .pc_cachetype = RC_REPLBUFF,
766 .pc_xdrressize = ST+(1+FH+pAT)+WC,
767 },
768 [NFS3PROC_SYMLINK] = {
769 .pc_func = (svc_procfunc) nfsd3_proc_symlink,
770 .pc_decode = (kxdrproc_t) nfs3svc_decode_symlinkargs,
771 .pc_encode = (kxdrproc_t) nfs3svc_encode_createres,
772 .pc_release = (kxdrproc_t) nfs3svc_release_fhandle2,
773 .pc_argsize = sizeof(struct nfsd3_symlinkargs),
774 .pc_ressize = sizeof(struct nfsd3_createres),
775 .pc_cachetype = RC_REPLBUFF,
776 .pc_xdrressize = ST+(1+FH+pAT)+WC,
777 },
778 [NFS3PROC_MKNOD] = {
779 .pc_func = (svc_procfunc) nfsd3_proc_mknod,
780 .pc_decode = (kxdrproc_t) nfs3svc_decode_mknodargs,
781 .pc_encode = (kxdrproc_t) nfs3svc_encode_createres,
782 .pc_release = (kxdrproc_t) nfs3svc_release_fhandle2,
783 .pc_argsize = sizeof(struct nfsd3_mknodargs),
784 .pc_ressize = sizeof(struct nfsd3_createres),
785 .pc_cachetype = RC_REPLBUFF,
786 .pc_xdrressize = ST+(1+FH+pAT)+WC,
787 },
788 [NFS3PROC_REMOVE] = {
789 .pc_func = (svc_procfunc) nfsd3_proc_remove,
790 .pc_decode = (kxdrproc_t) nfs3svc_decode_diropargs,
791 .pc_encode = (kxdrproc_t) nfs3svc_encode_wccstatres,
792 .pc_release = (kxdrproc_t) nfs3svc_release_fhandle,
793 .pc_argsize = sizeof(struct nfsd3_diropargs),
794 .pc_ressize = sizeof(struct nfsd3_wccstatres),
795 .pc_cachetype = RC_REPLBUFF,
796 .pc_xdrressize = ST+WC,
797 },
798 [NFS3PROC_RMDIR] = {
799 .pc_func = (svc_procfunc) nfsd3_proc_rmdir,
800 .pc_decode = (kxdrproc_t) nfs3svc_decode_diropargs,
801 .pc_encode = (kxdrproc_t) nfs3svc_encode_wccstatres,
802 .pc_release = (kxdrproc_t) nfs3svc_release_fhandle,
803 .pc_argsize = sizeof(struct nfsd3_diropargs),
804 .pc_ressize = sizeof(struct nfsd3_wccstatres),
805 .pc_cachetype = RC_REPLBUFF,
806 .pc_xdrressize = ST+WC,
807 },
808 [NFS3PROC_RENAME] = {
809 .pc_func = (svc_procfunc) nfsd3_proc_rename,
810 .pc_decode = (kxdrproc_t) nfs3svc_decode_renameargs,
811 .pc_encode = (kxdrproc_t) nfs3svc_encode_renameres,
812 .pc_release = (kxdrproc_t) nfs3svc_release_fhandle2,
813 .pc_argsize = sizeof(struct nfsd3_renameargs),
814 .pc_ressize = sizeof(struct nfsd3_renameres),
815 .pc_cachetype = RC_REPLBUFF,
816 .pc_xdrressize = ST+WC+WC,
817 },
818 [NFS3PROC_LINK] = {
819 .pc_func = (svc_procfunc) nfsd3_proc_link,
820 .pc_decode = (kxdrproc_t) nfs3svc_decode_linkargs,
821 .pc_encode = (kxdrproc_t) nfs3svc_encode_linkres,
822 .pc_release = (kxdrproc_t) nfs3svc_release_fhandle2,
823 .pc_argsize = sizeof(struct nfsd3_linkargs),
824 .pc_ressize = sizeof(struct nfsd3_linkres),
825 .pc_cachetype = RC_REPLBUFF,
826 .pc_xdrressize = ST+pAT+WC,
827 },
828 [NFS3PROC_READDIR] = {
829 .pc_func = (svc_procfunc) nfsd3_proc_readdir,
830 .pc_decode = (kxdrproc_t) nfs3svc_decode_readdirargs,
831 .pc_encode = (kxdrproc_t) nfs3svc_encode_readdirres,
832 .pc_release = (kxdrproc_t) nfs3svc_release_fhandle,
833 .pc_argsize = sizeof(struct nfsd3_readdirargs),
834 .pc_ressize = sizeof(struct nfsd3_readdirres),
835 .pc_cachetype = RC_NOCACHE,
836 },
837 [NFS3PROC_READDIRPLUS] = {
838 .pc_func = (svc_procfunc) nfsd3_proc_readdirplus,
839 .pc_decode = (kxdrproc_t) nfs3svc_decode_readdirplusargs,
840 .pc_encode = (kxdrproc_t) nfs3svc_encode_readdirres,
841 .pc_release = (kxdrproc_t) nfs3svc_release_fhandle,
842 .pc_argsize = sizeof(struct nfsd3_readdirplusargs),
843 .pc_ressize = sizeof(struct nfsd3_readdirres),
844 .pc_cachetype = RC_NOCACHE,
845 },
846 [NFS3PROC_FSSTAT] = {
847 .pc_func = (svc_procfunc) nfsd3_proc_fsstat,
848 .pc_decode = (kxdrproc_t) nfs3svc_decode_fhandleargs,
849 .pc_encode = (kxdrproc_t) nfs3svc_encode_fsstatres,
850 .pc_argsize = sizeof(struct nfsd3_fhandleargs),
851 .pc_ressize = sizeof(struct nfsd3_fsstatres),
852 .pc_cachetype = RC_NOCACHE,
853 .pc_xdrressize = ST+pAT+2*6+1,
854 },
855 [NFS3PROC_FSINFO] = {
856 .pc_func = (svc_procfunc) nfsd3_proc_fsinfo,
857 .pc_decode = (kxdrproc_t) nfs3svc_decode_fhandleargs,
858 .pc_encode = (kxdrproc_t) nfs3svc_encode_fsinfores,
859 .pc_argsize = sizeof(struct nfsd3_fhandleargs),
860 .pc_ressize = sizeof(struct nfsd3_fsinfores),
861 .pc_cachetype = RC_NOCACHE,
862 .pc_xdrressize = ST+pAT+12,
863 },
864 [NFS3PROC_PATHCONF] = {
865 .pc_func = (svc_procfunc) nfsd3_proc_pathconf,
866 .pc_decode = (kxdrproc_t) nfs3svc_decode_fhandleargs,
867 .pc_encode = (kxdrproc_t) nfs3svc_encode_pathconfres,
868 .pc_argsize = sizeof(struct nfsd3_fhandleargs),
869 .pc_ressize = sizeof(struct nfsd3_pathconfres),
870 .pc_cachetype = RC_NOCACHE,
871 .pc_xdrressize = ST+pAT+6,
872 },
873 [NFS3PROC_COMMIT] = {
874 .pc_func = (svc_procfunc) nfsd3_proc_commit,
875 .pc_decode = (kxdrproc_t) nfs3svc_decode_commitargs,
876 .pc_encode = (kxdrproc_t) nfs3svc_encode_commitres,
877 .pc_release = (kxdrproc_t) nfs3svc_release_fhandle,
878 .pc_argsize = sizeof(struct nfsd3_commitargs),
879 .pc_ressize = sizeof(struct nfsd3_commitres),
880 .pc_cachetype = RC_NOCACHE,
881 .pc_xdrressize = ST+WC+2,
882 },
1da177e4
LT		 883};
884
885struct svc_version nfsd_version3 = {
886 .vs_vers = 3,
887 .vs_nproc = 22,
888 .vs_proc = nfsd_procedures3,
889 .vs_dispatch = nfsd_dispatch,
890 .vs_xdrsize = NFS3_SVC_XDRSIZE,
891};
Linux 6.x block layer and io_uring tree(s)