NFSD: Clean up legacy NFS WRITE argument XDR decoders
[linux-2.6-block.git] / fs / nfsd / nfs3proc.c
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Process version 3 NFS requests.
4  *
5  * Copyright (C) 1996, 1997, 1998 Olaf Kirch <okir@monad.swb.de>
6  */
7
8 #include <linux/fs.h>
9 #include <linux/ext2_fs.h>
10 #include <linux/magic.h>
11
12 #include "cache.h"
13 #include "xdr3.h"
14 #include "vfs.h"
15
16 #define NFSDDBG_FACILITY                NFSDDBG_PROC
17
18 #define RETURN_STATUS(st)       { resp->status = (st); return (st); }
19
20 static int      nfs3_ftypes[] = {
21         0,                      /* NF3NON */
22         S_IFREG,                /* NF3REG */
23         S_IFDIR,                /* NF3DIR */
24         S_IFBLK,                /* NF3BLK */
25         S_IFCHR,                /* NF3CHR */
26         S_IFLNK,                /* NF3LNK */
27         S_IFSOCK,               /* NF3SOCK */
28         S_IFIFO,                /* NF3FIFO */
29 };
30
31 /*
32  * NULL call.
33  */
34 static __be32
35 nfsd3_proc_null(struct svc_rqst *rqstp)
36 {
37         return nfs_ok;
38 }
39
40 /*
41  * Get a file's attributes
42  */
43 static __be32
44 nfsd3_proc_getattr(struct svc_rqst *rqstp)
45 {
46         struct nfsd_fhandle *argp = rqstp->rq_argp;
47         struct nfsd3_attrstat *resp = rqstp->rq_resp;
48         __be32  nfserr;
49
50         dprintk("nfsd: GETATTR(3)  %s\n",
51                 SVCFH_fmt(&argp->fh));
52
53         fh_copy(&resp->fh, &argp->fh);
54         nfserr = fh_verify(rqstp, &resp->fh, 0,
55                         NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT);
56         if (nfserr)
57                 RETURN_STATUS(nfserr);
58
59         nfserr = fh_getattr(&resp->fh, &resp->stat);
60
61         RETURN_STATUS(nfserr);
62 }
63
64 /*
65  * Set a file's attributes
66  */
67 static __be32
68 nfsd3_proc_setattr(struct svc_rqst *rqstp)
69 {
70         struct nfsd3_sattrargs *argp = rqstp->rq_argp;
71         struct nfsd3_attrstat *resp = rqstp->rq_resp;
72         __be32  nfserr;
73
74         dprintk("nfsd: SETATTR(3)  %s\n",
75                                 SVCFH_fmt(&argp->fh));
76
77         fh_copy(&resp->fh, &argp->fh);
78         nfserr = nfsd_setattr(rqstp, &resp->fh, &argp->attrs,
79                               argp->check_guard, argp->guardtime);
80         RETURN_STATUS(nfserr);
81 }
82
83 /*
84  * Look up a path name component
85  */
86 static __be32
87 nfsd3_proc_lookup(struct svc_rqst *rqstp)
88 {
89         struct nfsd3_diropargs *argp = rqstp->rq_argp;
90         struct nfsd3_diropres  *resp = rqstp->rq_resp;
91         __be32  nfserr;
92
93         dprintk("nfsd: LOOKUP(3)   %s %.*s\n",
94                                 SVCFH_fmt(&argp->fh),
95                                 argp->len,
96                                 argp->name);
97
98         fh_copy(&resp->dirfh, &argp->fh);
99         fh_init(&resp->fh, NFS3_FHSIZE);
100
101         nfserr = nfsd_lookup(rqstp, &resp->dirfh,
102                                     argp->name,
103                                     argp->len,
104                                     &resp->fh);
105         RETURN_STATUS(nfserr);
106 }
107
108 /*
109  * Check file access
110  */
111 static __be32
112 nfsd3_proc_access(struct svc_rqst *rqstp)
113 {
114         struct nfsd3_accessargs *argp = rqstp->rq_argp;
115         struct nfsd3_accessres *resp = rqstp->rq_resp;
116         __be32  nfserr;
117
118         dprintk("nfsd: ACCESS(3)   %s 0x%x\n",
119                                 SVCFH_fmt(&argp->fh),
120                                 argp->access);
121
122         fh_copy(&resp->fh, &argp->fh);
123         resp->access = argp->access;
124         nfserr = nfsd_access(rqstp, &resp->fh, &resp->access, NULL);
125         RETURN_STATUS(nfserr);
126 }
127
128 /*
129  * Read a symlink.
130  */
131 static __be32
132 nfsd3_proc_readlink(struct svc_rqst *rqstp)
133 {
134         struct nfsd3_readlinkargs *argp = rqstp->rq_argp;
135         struct nfsd3_readlinkres *resp = rqstp->rq_resp;
136         __be32 nfserr;
137
138         dprintk("nfsd: READLINK(3) %s\n", SVCFH_fmt(&argp->fh));
139
140         /* Read the symlink. */
141         fh_copy(&resp->fh, &argp->fh);
142         resp->len = NFS3_MAXPATHLEN;
143         nfserr = nfsd_readlink(rqstp, &resp->fh, argp->buffer, &resp->len);
144         RETURN_STATUS(nfserr);
145 }
146
147 /*
148  * Read a portion of a file.
149  */
150 static __be32
151 nfsd3_proc_read(struct svc_rqst *rqstp)
152 {
153         struct nfsd3_readargs *argp = rqstp->rq_argp;
154         struct nfsd3_readres *resp = rqstp->rq_resp;
155         __be32  nfserr;
156         u32     max_blocksize = svc_max_payload(rqstp);
157         unsigned long cnt = min(argp->count, max_blocksize);
158
159         dprintk("nfsd: READ(3) %s %lu bytes at %Lu\n",
160                                 SVCFH_fmt(&argp->fh),
161                                 (unsigned long) argp->count,
162                                 (unsigned long long) argp->offset);
163
164         /* Obtain buffer pointer for payload.
165          * 1 (status) + 22 (post_op_attr) + 1 (count) + 1 (eof)
166          * + 1 (xdr opaque byte count) = 26
167          */
168         resp->count = cnt;
169         svc_reserve_auth(rqstp, ((1 + NFS3_POST_OP_ATTR_WORDS + 3)<<2) + resp->count +4);
170
171         fh_copy(&resp->fh, &argp->fh);
172         nfserr = nfsd_read(rqstp, &resp->fh,
173                                   argp->offset,
174                                   rqstp->rq_vec, argp->vlen,
175                                   &resp->count);
176         if (nfserr == 0) {
177                 struct inode    *inode = d_inode(resp->fh.fh_dentry);
178                 resp->eof = nfsd_eof_on_read(cnt, resp->count, argp->offset,
179                                                         inode->i_size);
180         }
181
182         RETURN_STATUS(nfserr);
183 }
184
185 /*
186  * Write data to a file
187  */
188 static __be32
189 nfsd3_proc_write(struct svc_rqst *rqstp)
190 {
191         struct nfsd3_writeargs *argp = rqstp->rq_argp;
192         struct nfsd3_writeres *resp = rqstp->rq_resp;
193         __be32  nfserr;
194         unsigned long cnt = argp->len;
195         unsigned int nvecs;
196
197         dprintk("nfsd: WRITE(3)    %s %d bytes at %Lu%s\n",
198                                 SVCFH_fmt(&argp->fh),
199                                 argp->len,
200                                 (unsigned long long) argp->offset,
201                                 argp->stable? " stable" : "");
202
203         fh_copy(&resp->fh, &argp->fh);
204         resp->committed = argp->stable;
205         nvecs = svc_fill_write_vector(rqstp, &argp->first, cnt);
206         if (!nvecs)
207                 RETURN_STATUS(nfserr_io);
208         nfserr = nfsd_write(rqstp, &resp->fh, argp->offset,
209                             rqstp->rq_vec, nvecs, &cnt,
210                             resp->committed);
211         resp->count = cnt;
212         RETURN_STATUS(nfserr);
213 }
214
215 /*
216  * With NFSv3, CREATE processing is a lot easier than with NFSv2.
217  * At least in theory; we'll see how it fares in practice when the
218  * first reports about SunOS compatibility problems start to pour in...
219  */
220 static __be32
221 nfsd3_proc_create(struct svc_rqst *rqstp)
222 {
223         struct nfsd3_createargs *argp = rqstp->rq_argp;
224         struct nfsd3_diropres *resp = rqstp->rq_resp;
225         svc_fh          *dirfhp, *newfhp = NULL;
226         struct iattr    *attr;
227         __be32          nfserr;
228
229         dprintk("nfsd: CREATE(3)   %s %.*s\n",
230                                 SVCFH_fmt(&argp->fh),
231                                 argp->len,
232                                 argp->name);
233
234         dirfhp = fh_copy(&resp->dirfh, &argp->fh);
235         newfhp = fh_init(&resp->fh, NFS3_FHSIZE);
236         attr   = &argp->attrs;
237
238         /* Unfudge the mode bits */
239         attr->ia_mode &= ~S_IFMT;
240         if (!(attr->ia_valid & ATTR_MODE)) { 
241                 attr->ia_valid |= ATTR_MODE;
242                 attr->ia_mode = S_IFREG;
243         } else {
244                 attr->ia_mode = (attr->ia_mode & ~S_IFMT) | S_IFREG;
245         }
246
247         /* Now create the file and set attributes */
248         nfserr = do_nfsd_create(rqstp, dirfhp, argp->name, argp->len,
249                                 attr, newfhp,
250                                 argp->createmode, (u32 *)argp->verf, NULL, NULL);
251
252         RETURN_STATUS(nfserr);
253 }
254
255 /*
256  * Make directory. This operation is not idempotent.
257  */
258 static __be32
259 nfsd3_proc_mkdir(struct svc_rqst *rqstp)
260 {
261         struct nfsd3_createargs *argp = rqstp->rq_argp;
262         struct nfsd3_diropres *resp = rqstp->rq_resp;
263         __be32  nfserr;
264
265         dprintk("nfsd: MKDIR(3)    %s %.*s\n",
266                                 SVCFH_fmt(&argp->fh),
267                                 argp->len,
268                                 argp->name);
269
270         argp->attrs.ia_valid &= ~ATTR_SIZE;
271         fh_copy(&resp->dirfh, &argp->fh);
272         fh_init(&resp->fh, NFS3_FHSIZE);
273         nfserr = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len,
274                                     &argp->attrs, S_IFDIR, 0, &resp->fh);
275         fh_unlock(&resp->dirfh);
276         RETURN_STATUS(nfserr);
277 }
278
279 static __be32
280 nfsd3_proc_symlink(struct svc_rqst *rqstp)
281 {
282         struct nfsd3_symlinkargs *argp = rqstp->rq_argp;
283         struct nfsd3_diropres *resp = rqstp->rq_resp;
284         __be32  nfserr;
285
286         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         nfserr = nfsd_symlink(rqstp, &resp->dirfh, argp->fname, argp->flen,
294                                                    argp->tname, &resp->fh);
295         RETURN_STATUS(nfserr);
296 }
297
298 /*
299  * Make socket/fifo/device.
300  */
301 static __be32
302 nfsd3_proc_mknod(struct svc_rqst *rqstp)
303 {
304         struct nfsd3_mknodargs *argp = rqstp->rq_argp;
305         struct nfsd3_diropres  *resp = rqstp->rq_resp;
306         __be32  nfserr;
307         int type;
308         dev_t   rdev = 0;
309
310         dprintk("nfsd: MKNOD(3)    %s %.*s\n",
311                                 SVCFH_fmt(&argp->fh),
312                                 argp->len,
313                                 argp->name);
314
315         fh_copy(&resp->dirfh, &argp->fh);
316         fh_init(&resp->fh, NFS3_FHSIZE);
317
318         if (argp->ftype == 0 || argp->ftype >= NF3BAD)
319                 RETURN_STATUS(nfserr_inval);
320         if (argp->ftype == NF3CHR || argp->ftype == NF3BLK) {
321                 rdev = MKDEV(argp->major, argp->minor);
322                 if (MAJOR(rdev) != argp->major ||
323                     MINOR(rdev) != argp->minor)
324                         RETURN_STATUS(nfserr_inval);
325         } else
326                 if (argp->ftype != NF3SOCK && argp->ftype != NF3FIFO)
327                         RETURN_STATUS(nfserr_inval);
328
329         type = nfs3_ftypes[argp->ftype];
330         nfserr = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len,
331                                     &argp->attrs, type, rdev, &resp->fh);
332         fh_unlock(&resp->dirfh);
333         RETURN_STATUS(nfserr);
334 }
335
336 /*
337  * Remove file/fifo/socket etc.
338  */
339 static __be32
340 nfsd3_proc_remove(struct svc_rqst *rqstp)
341 {
342         struct nfsd3_diropargs *argp = rqstp->rq_argp;
343         struct nfsd3_attrstat *resp = rqstp->rq_resp;
344         __be32  nfserr;
345
346         dprintk("nfsd: REMOVE(3)   %s %.*s\n",
347                                 SVCFH_fmt(&argp->fh),
348                                 argp->len,
349                                 argp->name);
350
351         /* Unlink. -S_IFDIR means file must not be a directory */
352         fh_copy(&resp->fh, &argp->fh);
353         nfserr = nfsd_unlink(rqstp, &resp->fh, -S_IFDIR, argp->name, argp->len);
354         fh_unlock(&resp->fh);
355         RETURN_STATUS(nfserr);
356 }
357
358 /*
359  * Remove a directory
360  */
361 static __be32
362 nfsd3_proc_rmdir(struct svc_rqst *rqstp)
363 {
364         struct nfsd3_diropargs *argp = rqstp->rq_argp;
365         struct nfsd3_attrstat *resp = rqstp->rq_resp;
366         __be32  nfserr;
367
368         dprintk("nfsd: RMDIR(3)    %s %.*s\n",
369                                 SVCFH_fmt(&argp->fh),
370                                 argp->len,
371                                 argp->name);
372
373         fh_copy(&resp->fh, &argp->fh);
374         nfserr = nfsd_unlink(rqstp, &resp->fh, S_IFDIR, argp->name, argp->len);
375         fh_unlock(&resp->fh);
376         RETURN_STATUS(nfserr);
377 }
378
379 static __be32
380 nfsd3_proc_rename(struct svc_rqst *rqstp)
381 {
382         struct nfsd3_renameargs *argp = rqstp->rq_argp;
383         struct nfsd3_renameres *resp = rqstp->rq_resp;
384         __be32  nfserr;
385
386         dprintk("nfsd: RENAME(3)   %s %.*s ->\n",
387                                 SVCFH_fmt(&argp->ffh),
388                                 argp->flen,
389                                 argp->fname);
390         dprintk("nfsd: -> %s %.*s\n",
391                                 SVCFH_fmt(&argp->tfh),
392                                 argp->tlen,
393                                 argp->tname);
394
395         fh_copy(&resp->ffh, &argp->ffh);
396         fh_copy(&resp->tfh, &argp->tfh);
397         nfserr = nfsd_rename(rqstp, &resp->ffh, argp->fname, argp->flen,
398                                     &resp->tfh, argp->tname, argp->tlen);
399         RETURN_STATUS(nfserr);
400 }
401
402 static __be32
403 nfsd3_proc_link(struct svc_rqst *rqstp)
404 {
405         struct nfsd3_linkargs *argp = rqstp->rq_argp;
406         struct nfsd3_linkres  *resp = rqstp->rq_resp;
407         __be32  nfserr;
408
409         dprintk("nfsd: LINK(3)     %s ->\n",
410                                 SVCFH_fmt(&argp->ffh));
411         dprintk("nfsd:   -> %s %.*s\n",
412                                 SVCFH_fmt(&argp->tfh),
413                                 argp->tlen,
414                                 argp->tname);
415
416         fh_copy(&resp->fh,  &argp->ffh);
417         fh_copy(&resp->tfh, &argp->tfh);
418         nfserr = nfsd_link(rqstp, &resp->tfh, argp->tname, argp->tlen,
419                                   &resp->fh);
420         RETURN_STATUS(nfserr);
421 }
422
423 /*
424  * Read a portion of a directory.
425  */
426 static __be32
427 nfsd3_proc_readdir(struct svc_rqst *rqstp)
428 {
429         struct nfsd3_readdirargs *argp = rqstp->rq_argp;
430         struct nfsd3_readdirres  *resp = rqstp->rq_resp;
431         __be32          nfserr;
432         int             count;
433
434         dprintk("nfsd: READDIR(3)  %s %d bytes at %d\n",
435                                 SVCFH_fmt(&argp->fh),
436                                 argp->count, (u32) argp->cookie);
437
438         /* Make sure we've room for the NULL ptr & eof flag, and shrink to
439          * client read size */
440         count = (argp->count >> 2) - 2;
441
442         /* Read directory and encode entries on the fly */
443         fh_copy(&resp->fh, &argp->fh);
444
445         resp->buflen = count;
446         resp->common.err = nfs_ok;
447         resp->buffer = argp->buffer;
448         resp->rqstp = rqstp;
449         nfserr = nfsd_readdir(rqstp, &resp->fh, (loff_t*) &argp->cookie, 
450                                         &resp->common, nfs3svc_encode_entry);
451         memcpy(resp->verf, argp->verf, 8);
452         resp->count = resp->buffer - argp->buffer;
453         if (resp->offset)
454                 xdr_encode_hyper(resp->offset, argp->cookie);
455
456         RETURN_STATUS(nfserr);
457 }
458
459 /*
460  * Read a portion of a directory, including file handles and attrs.
461  * For now, we choose to ignore the dircount parameter.
462  */
463 static __be32
464 nfsd3_proc_readdirplus(struct svc_rqst *rqstp)
465 {
466         struct nfsd3_readdirargs *argp = rqstp->rq_argp;
467         struct nfsd3_readdirres  *resp = rqstp->rq_resp;
468         __be32  nfserr;
469         int     count = 0;
470         loff_t  offset;
471         struct page **p;
472         caddr_t page_addr = NULL;
473
474         dprintk("nfsd: READDIR+(3) %s %d bytes at %d\n",
475                                 SVCFH_fmt(&argp->fh),
476                                 argp->count, (u32) argp->cookie);
477
478         /* Convert byte count to number of words (i.e. >> 2),
479          * and reserve room for the NULL ptr & eof flag (-2 words) */
480         resp->count = (argp->count >> 2) - 2;
481
482         /* Read directory and encode entries on the fly */
483         fh_copy(&resp->fh, &argp->fh);
484
485         resp->common.err = nfs_ok;
486         resp->buffer = argp->buffer;
487         resp->buflen = resp->count;
488         resp->rqstp = rqstp;
489         offset = argp->cookie;
490
491         nfserr = fh_verify(rqstp, &resp->fh, S_IFDIR, NFSD_MAY_NOP);
492         if (nfserr)
493                 RETURN_STATUS(nfserr);
494
495         if (resp->fh.fh_export->ex_flags & NFSEXP_NOREADDIRPLUS)
496                 RETURN_STATUS(nfserr_notsupp);
497
498         nfserr = nfsd_readdir(rqstp, &resp->fh,
499                                      &offset,
500                                      &resp->common,
501                                      nfs3svc_encode_entry_plus);
502         memcpy(resp->verf, argp->verf, 8);
503         for (p = rqstp->rq_respages + 1; p < rqstp->rq_next_page; p++) {
504                 page_addr = page_address(*p);
505
506                 if (((caddr_t)resp->buffer >= page_addr) &&
507                     ((caddr_t)resp->buffer < page_addr + PAGE_SIZE)) {
508                         count += (caddr_t)resp->buffer - page_addr;
509                         break;
510                 }
511                 count += PAGE_SIZE;
512         }
513         resp->count = count >> 2;
514         if (resp->offset) {
515                 if (unlikely(resp->offset1)) {
516                         /* we ended up with offset on a page boundary */
517                         *resp->offset = htonl(offset >> 32);
518                         *resp->offset1 = htonl(offset & 0xffffffff);
519                         resp->offset1 = NULL;
520                 } else {
521                         xdr_encode_hyper(resp->offset, offset);
522                 }
523         }
524
525         RETURN_STATUS(nfserr);
526 }
527
528 /*
529  * Get file system stats
530  */
531 static __be32
532 nfsd3_proc_fsstat(struct svc_rqst *rqstp)
533 {
534         struct nfsd_fhandle *argp = rqstp->rq_argp;
535         struct nfsd3_fsstatres *resp = rqstp->rq_resp;
536         __be32  nfserr;
537
538         dprintk("nfsd: FSSTAT(3)   %s\n",
539                                 SVCFH_fmt(&argp->fh));
540
541         nfserr = nfsd_statfs(rqstp, &argp->fh, &resp->stats, 0);
542         fh_put(&argp->fh);
543         RETURN_STATUS(nfserr);
544 }
545
546 /*
547  * Get file system info
548  */
549 static __be32
550 nfsd3_proc_fsinfo(struct svc_rqst *rqstp)
551 {
552         struct nfsd_fhandle *argp = rqstp->rq_argp;
553         struct nfsd3_fsinfores *resp = rqstp->rq_resp;
554         __be32  nfserr;
555         u32     max_blocksize = svc_max_payload(rqstp);
556
557         dprintk("nfsd: FSINFO(3)   %s\n",
558                                 SVCFH_fmt(&argp->fh));
559
560         resp->f_rtmax  = max_blocksize;
561         resp->f_rtpref = max_blocksize;
562         resp->f_rtmult = PAGE_SIZE;
563         resp->f_wtmax  = max_blocksize;
564         resp->f_wtpref = max_blocksize;
565         resp->f_wtmult = PAGE_SIZE;
566         resp->f_dtpref = PAGE_SIZE;
567         resp->f_maxfilesize = ~(u32) 0;
568         resp->f_properties = NFS3_FSF_DEFAULT;
569
570         nfserr = fh_verify(rqstp, &argp->fh, 0,
571                         NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT);
572
573         /* Check special features of the file system. May request
574          * different read/write sizes for file systems known to have
575          * problems with large blocks */
576         if (nfserr == 0) {
577                 struct super_block *sb = argp->fh.fh_dentry->d_sb;
578
579                 /* Note that we don't care for remote fs's here */
580                 if (sb->s_magic == MSDOS_SUPER_MAGIC) {
581                         resp->f_properties = NFS3_FSF_BILLYBOY;
582                 }
583                 resp->f_maxfilesize = sb->s_maxbytes;
584         }
585
586         fh_put(&argp->fh);
587         RETURN_STATUS(nfserr);
588 }
589
590 /*
591  * Get pathconf info for the specified file
592  */
593 static __be32
594 nfsd3_proc_pathconf(struct svc_rqst *rqstp)
595 {
596         struct nfsd_fhandle *argp = rqstp->rq_argp;
597         struct nfsd3_pathconfres *resp = rqstp->rq_resp;
598         __be32  nfserr;
599
600         dprintk("nfsd: PATHCONF(3) %s\n",
601                                 SVCFH_fmt(&argp->fh));
602
603         /* Set default pathconf */
604         resp->p_link_max = 255;         /* at least */
605         resp->p_name_max = 255;         /* at least */
606         resp->p_no_trunc = 0;
607         resp->p_chown_restricted = 1;
608         resp->p_case_insensitive = 0;
609         resp->p_case_preserving = 1;
610
611         nfserr = fh_verify(rqstp, &argp->fh, 0, NFSD_MAY_NOP);
612
613         if (nfserr == 0) {
614                 struct super_block *sb = argp->fh.fh_dentry->d_sb;
615
616                 /* Note that we don't care for remote fs's here */
617                 switch (sb->s_magic) {
618                 case EXT2_SUPER_MAGIC:
619                         resp->p_link_max = EXT2_LINK_MAX;
620                         resp->p_name_max = EXT2_NAME_LEN;
621                         break;
622                 case MSDOS_SUPER_MAGIC:
623                         resp->p_case_insensitive = 1;
624                         resp->p_case_preserving  = 0;
625                         break;
626                 }
627         }
628
629         fh_put(&argp->fh);
630         RETURN_STATUS(nfserr);
631 }
632
633
634 /*
635  * Commit a file (range) to stable storage.
636  */
637 static __be32
638 nfsd3_proc_commit(struct svc_rqst *rqstp)
639 {
640         struct nfsd3_commitargs *argp = rqstp->rq_argp;
641         struct nfsd3_commitres *resp = rqstp->rq_resp;
642         __be32  nfserr;
643
644         dprintk("nfsd: COMMIT(3)   %s %u@%Lu\n",
645                                 SVCFH_fmt(&argp->fh),
646                                 argp->count,
647                                 (unsigned long long) argp->offset);
648
649         if (argp->offset > NFS_OFFSET_MAX)
650                 RETURN_STATUS(nfserr_inval);
651
652         fh_copy(&resp->fh, &argp->fh);
653         nfserr = nfsd_commit(rqstp, &resp->fh, argp->offset, argp->count);
654
655         RETURN_STATUS(nfserr);
656 }
657
658
659 /*
660  * NFSv3 Server procedures.
661  * Only the results of non-idempotent operations are cached.
662  */
663 #define nfs3svc_decode_fhandleargs      nfs3svc_decode_fhandle
664 #define nfs3svc_encode_attrstatres      nfs3svc_encode_attrstat
665 #define nfs3svc_encode_wccstatres       nfs3svc_encode_wccstat
666 #define nfsd3_mkdirargs                 nfsd3_createargs
667 #define nfsd3_readdirplusargs           nfsd3_readdirargs
668 #define nfsd3_fhandleargs               nfsd_fhandle
669 #define nfsd3_fhandleres                nfsd3_attrstat
670 #define nfsd3_attrstatres               nfsd3_attrstat
671 #define nfsd3_wccstatres                nfsd3_attrstat
672 #define nfsd3_createres                 nfsd3_diropres
673 #define nfsd3_voidres                   nfsd3_voidargs
674 struct nfsd3_voidargs { int dummy; };
675
676 #define ST 1            /* status*/
677 #define FH 17           /* filehandle with length */
678 #define AT 21           /* attributes */
679 #define pAT (1+AT)      /* post attributes - conditional */
680 #define WC (7+pAT)      /* WCC attributes */
681
682 static const struct svc_procedure nfsd_procedures3[22] = {
683         [NFS3PROC_NULL] = {
684                 .pc_func = nfsd3_proc_null,
685                 .pc_encode = nfs3svc_encode_voidres,
686                 .pc_argsize = sizeof(struct nfsd3_voidargs),
687                 .pc_ressize = sizeof(struct nfsd3_voidres),
688                 .pc_cachetype = RC_NOCACHE,
689                 .pc_xdrressize = ST,
690         },
691         [NFS3PROC_GETATTR] = {
692                 .pc_func = nfsd3_proc_getattr,
693                 .pc_decode = nfs3svc_decode_fhandleargs,
694                 .pc_encode = nfs3svc_encode_attrstatres,
695                 .pc_release = nfs3svc_release_fhandle,
696                 .pc_argsize = sizeof(struct nfsd3_fhandleargs),
697                 .pc_ressize = sizeof(struct nfsd3_attrstatres),
698                 .pc_cachetype = RC_NOCACHE,
699                 .pc_xdrressize = ST+AT,
700         },
701         [NFS3PROC_SETATTR] = {
702                 .pc_func = nfsd3_proc_setattr,
703                 .pc_decode = nfs3svc_decode_sattrargs,
704                 .pc_encode = nfs3svc_encode_wccstatres,
705                 .pc_release = nfs3svc_release_fhandle,
706                 .pc_argsize = sizeof(struct nfsd3_sattrargs),
707                 .pc_ressize = sizeof(struct nfsd3_wccstatres),
708                 .pc_cachetype = RC_REPLBUFF,
709                 .pc_xdrressize = ST+WC,
710         },
711         [NFS3PROC_LOOKUP] = {
712                 .pc_func = nfsd3_proc_lookup,
713                 .pc_decode = nfs3svc_decode_diropargs,
714                 .pc_encode = nfs3svc_encode_diropres,
715                 .pc_release = nfs3svc_release_fhandle2,
716                 .pc_argsize = sizeof(struct nfsd3_diropargs),
717                 .pc_ressize = sizeof(struct nfsd3_diropres),
718                 .pc_cachetype = RC_NOCACHE,
719                 .pc_xdrressize = ST+FH+pAT+pAT,
720         },
721         [NFS3PROC_ACCESS] = {
722                 .pc_func = nfsd3_proc_access,
723                 .pc_decode = nfs3svc_decode_accessargs,
724                 .pc_encode = nfs3svc_encode_accessres,
725                 .pc_release = nfs3svc_release_fhandle,
726                 .pc_argsize = sizeof(struct nfsd3_accessargs),
727                 .pc_ressize = sizeof(struct nfsd3_accessres),
728                 .pc_cachetype = RC_NOCACHE,
729                 .pc_xdrressize = ST+pAT+1,
730         },
731         [NFS3PROC_READLINK] = {
732                 .pc_func = nfsd3_proc_readlink,
733                 .pc_decode = nfs3svc_decode_readlinkargs,
734                 .pc_encode = nfs3svc_encode_readlinkres,
735                 .pc_release = nfs3svc_release_fhandle,
736                 .pc_argsize = sizeof(struct nfsd3_readlinkargs),
737                 .pc_ressize = sizeof(struct nfsd3_readlinkres),
738                 .pc_cachetype = RC_NOCACHE,
739                 .pc_xdrressize = ST+pAT+1+NFS3_MAXPATHLEN/4,
740         },
741         [NFS3PROC_READ] = {
742                 .pc_func = nfsd3_proc_read,
743                 .pc_decode = nfs3svc_decode_readargs,
744                 .pc_encode = nfs3svc_encode_readres,
745                 .pc_release = nfs3svc_release_fhandle,
746                 .pc_argsize = sizeof(struct nfsd3_readargs),
747                 .pc_ressize = sizeof(struct nfsd3_readres),
748                 .pc_cachetype = RC_NOCACHE,
749                 .pc_xdrressize = ST+pAT+4+NFSSVC_MAXBLKSIZE/4,
750         },
751         [NFS3PROC_WRITE] = {
752                 .pc_func = nfsd3_proc_write,
753                 .pc_decode = nfs3svc_decode_writeargs,
754                 .pc_encode = nfs3svc_encode_writeres,
755                 .pc_release = nfs3svc_release_fhandle,
756                 .pc_argsize = sizeof(struct nfsd3_writeargs),
757                 .pc_ressize = sizeof(struct nfsd3_writeres),
758                 .pc_cachetype = RC_REPLBUFF,
759                 .pc_xdrressize = ST+WC+4,
760         },
761         [NFS3PROC_CREATE] = {
762                 .pc_func = nfsd3_proc_create,
763                 .pc_decode = nfs3svc_decode_createargs,
764                 .pc_encode = nfs3svc_encode_createres,
765                 .pc_release = nfs3svc_release_fhandle2,
766                 .pc_argsize = sizeof(struct nfsd3_createargs),
767                 .pc_ressize = sizeof(struct nfsd3_createres),
768                 .pc_cachetype = RC_REPLBUFF,
769                 .pc_xdrressize = ST+(1+FH+pAT)+WC,
770         },
771         [NFS3PROC_MKDIR] = {
772                 .pc_func = nfsd3_proc_mkdir,
773                 .pc_decode = nfs3svc_decode_mkdirargs,
774                 .pc_encode = nfs3svc_encode_createres,
775                 .pc_release = nfs3svc_release_fhandle2,
776                 .pc_argsize = sizeof(struct nfsd3_mkdirargs),
777                 .pc_ressize = sizeof(struct nfsd3_createres),
778                 .pc_cachetype = RC_REPLBUFF,
779                 .pc_xdrressize = ST+(1+FH+pAT)+WC,
780         },
781         [NFS3PROC_SYMLINK] = {
782                 .pc_func = nfsd3_proc_symlink,
783                 .pc_decode = nfs3svc_decode_symlinkargs,
784                 .pc_encode = nfs3svc_encode_createres,
785                 .pc_release = nfs3svc_release_fhandle2,
786                 .pc_argsize = sizeof(struct nfsd3_symlinkargs),
787                 .pc_ressize = sizeof(struct nfsd3_createres),
788                 .pc_cachetype = RC_REPLBUFF,
789                 .pc_xdrressize = ST+(1+FH+pAT)+WC,
790         },
791         [NFS3PROC_MKNOD] = {
792                 .pc_func = nfsd3_proc_mknod,
793                 .pc_decode = nfs3svc_decode_mknodargs,
794                 .pc_encode = nfs3svc_encode_createres,
795                 .pc_release = nfs3svc_release_fhandle2,
796                 .pc_argsize = sizeof(struct nfsd3_mknodargs),
797                 .pc_ressize = sizeof(struct nfsd3_createres),
798                 .pc_cachetype = RC_REPLBUFF,
799                 .pc_xdrressize = ST+(1+FH+pAT)+WC,
800         },
801         [NFS3PROC_REMOVE] = {
802                 .pc_func = nfsd3_proc_remove,
803                 .pc_decode = nfs3svc_decode_diropargs,
804                 .pc_encode = nfs3svc_encode_wccstatres,
805                 .pc_release = nfs3svc_release_fhandle,
806                 .pc_argsize = sizeof(struct nfsd3_diropargs),
807                 .pc_ressize = sizeof(struct nfsd3_wccstatres),
808                 .pc_cachetype = RC_REPLBUFF,
809                 .pc_xdrressize = ST+WC,
810         },
811         [NFS3PROC_RMDIR] = {
812                 .pc_func = nfsd3_proc_rmdir,
813                 .pc_decode = nfs3svc_decode_diropargs,
814                 .pc_encode = nfs3svc_encode_wccstatres,
815                 .pc_release = nfs3svc_release_fhandle,
816                 .pc_argsize = sizeof(struct nfsd3_diropargs),
817                 .pc_ressize = sizeof(struct nfsd3_wccstatres),
818                 .pc_cachetype = RC_REPLBUFF,
819                 .pc_xdrressize = ST+WC,
820         },
821         [NFS3PROC_RENAME] = {
822                 .pc_func = nfsd3_proc_rename,
823                 .pc_decode = nfs3svc_decode_renameargs,
824                 .pc_encode = nfs3svc_encode_renameres,
825                 .pc_release = nfs3svc_release_fhandle2,
826                 .pc_argsize = sizeof(struct nfsd3_renameargs),
827                 .pc_ressize = sizeof(struct nfsd3_renameres),
828                 .pc_cachetype = RC_REPLBUFF,
829                 .pc_xdrressize = ST+WC+WC,
830         },
831         [NFS3PROC_LINK] = {
832                 .pc_func = nfsd3_proc_link,
833                 .pc_decode = nfs3svc_decode_linkargs,
834                 .pc_encode = nfs3svc_encode_linkres,
835                 .pc_release = nfs3svc_release_fhandle2,
836                 .pc_argsize = sizeof(struct nfsd3_linkargs),
837                 .pc_ressize = sizeof(struct nfsd3_linkres),
838                 .pc_cachetype = RC_REPLBUFF,
839                 .pc_xdrressize = ST+pAT+WC,
840         },
841         [NFS3PROC_READDIR] = {
842                 .pc_func = nfsd3_proc_readdir,
843                 .pc_decode = nfs3svc_decode_readdirargs,
844                 .pc_encode = nfs3svc_encode_readdirres,
845                 .pc_release = nfs3svc_release_fhandle,
846                 .pc_argsize = sizeof(struct nfsd3_readdirargs),
847                 .pc_ressize = sizeof(struct nfsd3_readdirres),
848                 .pc_cachetype = RC_NOCACHE,
849         },
850         [NFS3PROC_READDIRPLUS] = {
851                 .pc_func = nfsd3_proc_readdirplus,
852                 .pc_decode = nfs3svc_decode_readdirplusargs,
853                 .pc_encode = nfs3svc_encode_readdirres,
854                 .pc_release = nfs3svc_release_fhandle,
855                 .pc_argsize = sizeof(struct nfsd3_readdirplusargs),
856                 .pc_ressize = sizeof(struct nfsd3_readdirres),
857                 .pc_cachetype = RC_NOCACHE,
858         },
859         [NFS3PROC_FSSTAT] = {
860                 .pc_func = nfsd3_proc_fsstat,
861                 .pc_decode = nfs3svc_decode_fhandleargs,
862                 .pc_encode = nfs3svc_encode_fsstatres,
863                 .pc_argsize = sizeof(struct nfsd3_fhandleargs),
864                 .pc_ressize = sizeof(struct nfsd3_fsstatres),
865                 .pc_cachetype = RC_NOCACHE,
866                 .pc_xdrressize = ST+pAT+2*6+1,
867         },
868         [NFS3PROC_FSINFO] = {
869                 .pc_func = nfsd3_proc_fsinfo,
870                 .pc_decode = nfs3svc_decode_fhandleargs,
871                 .pc_encode = nfs3svc_encode_fsinfores,
872                 .pc_argsize = sizeof(struct nfsd3_fhandleargs),
873                 .pc_ressize = sizeof(struct nfsd3_fsinfores),
874                 .pc_cachetype = RC_NOCACHE,
875                 .pc_xdrressize = ST+pAT+12,
876         },
877         [NFS3PROC_PATHCONF] = {
878                 .pc_func = nfsd3_proc_pathconf,
879                 .pc_decode = nfs3svc_decode_fhandleargs,
880                 .pc_encode = nfs3svc_encode_pathconfres,
881                 .pc_argsize = sizeof(struct nfsd3_fhandleargs),
882                 .pc_ressize = sizeof(struct nfsd3_pathconfres),
883                 .pc_cachetype = RC_NOCACHE,
884                 .pc_xdrressize = ST+pAT+6,
885         },
886         [NFS3PROC_COMMIT] = {
887                 .pc_func = nfsd3_proc_commit,
888                 .pc_decode = nfs3svc_decode_commitargs,
889                 .pc_encode = nfs3svc_encode_commitres,
890                 .pc_release = nfs3svc_release_fhandle,
891                 .pc_argsize = sizeof(struct nfsd3_commitargs),
892                 .pc_ressize = sizeof(struct nfsd3_commitres),
893                 .pc_cachetype = RC_NOCACHE,
894                 .pc_xdrressize = ST+WC+2,
895         },
896 };
897
898 static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures3)];
899 const struct svc_version nfsd_version3 = {
900         .vs_vers        = 3,
901         .vs_nproc       = 22,
902         .vs_proc        = nfsd_procedures3,
903         .vs_dispatch    = nfsd_dispatch,
904         .vs_count       = nfsd_count3,
905         .vs_xdrsize     = NFS3_SVC_XDRSIZE,
906 };