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[karo-tx-linux.git] / fs / nfsd / nfs3proc.c
1 /*
2  * Process version 3 NFS requests.
3  *
4  * Copyright (C) 1996, 1997, 1998 Olaf Kirch <okir@monad.swb.de>
5  */
6
7 #include <linux/fs.h>
8 #include <linux/ext2_fs.h>
9 #include <linux/magic.h>
10
11 #include "cache.h"
12 #include "xdr3.h"
13 #include "vfs.h"
14
15 #define NFSDDBG_FACILITY                NFSDDBG_PROC
16
17 #define RETURN_STATUS(st)       { resp->status = (st); return (st); }
18
19 static 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  */
33 static __be32
34 nfsd3_proc_null(struct svc_rqst *rqstp)
35 {
36         return nfs_ok;
37 }
38
39 /*
40  * Get a file's attributes
41  */
42 static __be32
43 nfsd3_proc_getattr(struct svc_rqst *rqstp)
44 {
45         struct nfsd_fhandle *argp = rqstp->rq_argp;
46         struct nfsd3_attrstat *resp = rqstp->rq_resp;
47         __be32  nfserr;
48
49         dprintk("nfsd: GETATTR(3)  %s\n",
50                 SVCFH_fmt(&argp->fh));
51
52         fh_copy(&resp->fh, &argp->fh);
53         nfserr = fh_verify(rqstp, &resp->fh, 0,
54                         NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT);
55         if (nfserr)
56                 RETURN_STATUS(nfserr);
57
58         nfserr = fh_getattr(&resp->fh, &resp->stat);
59
60         RETURN_STATUS(nfserr);
61 }
62
63 /*
64  * Set a file's attributes
65  */
66 static __be32
67 nfsd3_proc_setattr(struct svc_rqst *rqstp)
68 {
69         struct nfsd3_sattrargs *argp = rqstp->rq_argp;
70         struct nfsd3_attrstat *resp = rqstp->rq_resp;
71         __be32  nfserr;
72
73         dprintk("nfsd: SETATTR(3)  %s\n",
74                                 SVCFH_fmt(&argp->fh));
75
76         fh_copy(&resp->fh, &argp->fh);
77         nfserr = nfsd_setattr(rqstp, &resp->fh, &argp->attrs,
78                               argp->check_guard, argp->guardtime);
79         RETURN_STATUS(nfserr);
80 }
81
82 /*
83  * Look up a path name component
84  */
85 static __be32
86 nfsd3_proc_lookup(struct svc_rqst *rqstp)
87 {
88         struct nfsd3_diropargs *argp = rqstp->rq_argp;
89         struct nfsd3_diropres  *resp = rqstp->rq_resp;
90         __be32  nfserr;
91
92         dprintk("nfsd: LOOKUP(3)   %s %.*s\n",
93                                 SVCFH_fmt(&argp->fh),
94                                 argp->len,
95                                 argp->name);
96
97         fh_copy(&resp->dirfh, &argp->fh);
98         fh_init(&resp->fh, NFS3_FHSIZE);
99
100         nfserr = nfsd_lookup(rqstp, &resp->dirfh,
101                                     argp->name,
102                                     argp->len,
103                                     &resp->fh);
104         RETURN_STATUS(nfserr);
105 }
106
107 /*
108  * Check file access
109  */
110 static __be32
111 nfsd3_proc_access(struct svc_rqst *rqstp)
112 {
113         struct nfsd3_accessargs *argp = rqstp->rq_argp;
114         struct nfsd3_accessres *resp = rqstp->rq_resp;
115         __be32  nfserr;
116
117         dprintk("nfsd: ACCESS(3)   %s 0x%x\n",
118                                 SVCFH_fmt(&argp->fh),
119                                 argp->access);
120
121         fh_copy(&resp->fh, &argp->fh);
122         resp->access = argp->access;
123         nfserr = nfsd_access(rqstp, &resp->fh, &resp->access, NULL);
124         RETURN_STATUS(nfserr);
125 }
126
127 /*
128  * Read a symlink.
129  */
130 static __be32
131 nfsd3_proc_readlink(struct svc_rqst *rqstp)
132 {
133         struct nfsd3_readlinkargs *argp = rqstp->rq_argp;
134         struct nfsd3_readlinkres *resp = rqstp->rq_resp;
135         __be32 nfserr;
136
137         dprintk("nfsd: READLINK(3) %s\n", SVCFH_fmt(&argp->fh));
138
139         /* Read the symlink. */
140         fh_copy(&resp->fh, &argp->fh);
141         resp->len = NFS3_MAXPATHLEN;
142         nfserr = nfsd_readlink(rqstp, &resp->fh, argp->buffer, &resp->len);
143         RETURN_STATUS(nfserr);
144 }
145
146 /*
147  * Read a portion of a file.
148  */
149 static __be32
150 nfsd3_proc_read(struct svc_rqst *rqstp)
151 {
152         struct nfsd3_readargs *argp = rqstp->rq_argp;
153         struct nfsd3_readres *resp = rqstp->rq_resp;
154         __be32  nfserr;
155         u32     max_blocksize = svc_max_payload(rqstp);
156         unsigned long cnt = min(argp->count, max_blocksize);
157
158         dprintk("nfsd: READ(3) %s %lu bytes at %Lu\n",
159                                 SVCFH_fmt(&argp->fh),
160                                 (unsigned long) argp->count,
161                                 (unsigned long long) argp->offset);
162
163         /* Obtain buffer pointer for payload.
164          * 1 (status) + 22 (post_op_attr) + 1 (count) + 1 (eof)
165          * + 1 (xdr opaque byte count) = 26
166          */
167         resp->count = cnt;
168         svc_reserve_auth(rqstp, ((1 + NFS3_POST_OP_ATTR_WORDS + 3)<<2) + resp->count +4);
169
170         fh_copy(&resp->fh, &argp->fh);
171         nfserr = nfsd_read(rqstp, &resp->fh,
172                                   argp->offset,
173                                   rqstp->rq_vec, argp->vlen,
174                                   &resp->count);
175         if (nfserr == 0) {
176                 struct inode    *inode = d_inode(resp->fh.fh_dentry);
177                 resp->eof = nfsd_eof_on_read(cnt, resp->count, argp->offset,
178                                                         inode->i_size);
179         }
180
181         RETURN_STATUS(nfserr);
182 }
183
184 /*
185  * Write data to a file
186  */
187 static __be32
188 nfsd3_proc_write(struct svc_rqst *rqstp)
189 {
190         struct nfsd3_writeargs *argp = rqstp->rq_argp;
191         struct nfsd3_writeres *resp = rqstp->rq_resp;
192         __be32  nfserr;
193         unsigned long cnt = argp->len;
194
195         dprintk("nfsd: WRITE(3)    %s %d bytes at %Lu%s\n",
196                                 SVCFH_fmt(&argp->fh),
197                                 argp->len,
198                                 (unsigned long long) argp->offset,
199                                 argp->stable? " stable" : "");
200
201         fh_copy(&resp->fh, &argp->fh);
202         resp->committed = argp->stable;
203         nfserr = nfsd_write(rqstp, &resp->fh, argp->offset,
204                                 rqstp->rq_vec, argp->vlen,
205                                 &cnt, resp->committed);
206         resp->count = cnt;
207         RETURN_STATUS(nfserr);
208 }
209
210 /*
211  * With NFSv3, CREATE processing is a lot easier than with NFSv2.
212  * At least in theory; we'll see how it fares in practice when the
213  * first reports about SunOS compatibility problems start to pour in...
214  */
215 static __be32
216 nfsd3_proc_create(struct svc_rqst *rqstp)
217 {
218         struct nfsd3_createargs *argp = rqstp->rq_argp;
219         struct nfsd3_diropres *resp = rqstp->rq_resp;
220         svc_fh          *dirfhp, *newfhp = NULL;
221         struct iattr    *attr;
222         __be32          nfserr;
223
224         dprintk("nfsd: CREATE(3)   %s %.*s\n",
225                                 SVCFH_fmt(&argp->fh),
226                                 argp->len,
227                                 argp->name);
228
229         dirfhp = fh_copy(&resp->dirfh, &argp->fh);
230         newfhp = fh_init(&resp->fh, NFS3_FHSIZE);
231         attr   = &argp->attrs;
232
233         /* Unfudge the mode bits */
234         attr->ia_mode &= ~S_IFMT;
235         if (!(attr->ia_valid & ATTR_MODE)) { 
236                 attr->ia_valid |= ATTR_MODE;
237                 attr->ia_mode = S_IFREG;
238         } else {
239                 attr->ia_mode = (attr->ia_mode & ~S_IFMT) | S_IFREG;
240         }
241
242         /* Now create the file and set attributes */
243         nfserr = do_nfsd_create(rqstp, dirfhp, argp->name, argp->len,
244                                 attr, newfhp,
245                                 argp->createmode, (u32 *)argp->verf, NULL, NULL);
246
247         RETURN_STATUS(nfserr);
248 }
249
250 /*
251  * Make directory. This operation is not idempotent.
252  */
253 static __be32
254 nfsd3_proc_mkdir(struct svc_rqst *rqstp)
255 {
256         struct nfsd3_createargs *argp = rqstp->rq_argp;
257         struct nfsd3_diropres *resp = rqstp->rq_resp;
258         __be32  nfserr;
259
260         dprintk("nfsd: MKDIR(3)    %s %.*s\n",
261                                 SVCFH_fmt(&argp->fh),
262                                 argp->len,
263                                 argp->name);
264
265         argp->attrs.ia_valid &= ~ATTR_SIZE;
266         fh_copy(&resp->dirfh, &argp->fh);
267         fh_init(&resp->fh, NFS3_FHSIZE);
268         nfserr = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len,
269                                     &argp->attrs, S_IFDIR, 0, &resp->fh);
270         fh_unlock(&resp->dirfh);
271         RETURN_STATUS(nfserr);
272 }
273
274 static __be32
275 nfsd3_proc_symlink(struct svc_rqst *rqstp)
276 {
277         struct nfsd3_symlinkargs *argp = rqstp->rq_argp;
278         struct nfsd3_diropres *resp = rqstp->rq_resp;
279         __be32  nfserr;
280
281         dprintk("nfsd: SYMLINK(3)  %s %.*s -> %.*s\n",
282                                 SVCFH_fmt(&argp->ffh),
283                                 argp->flen, argp->fname,
284                                 argp->tlen, argp->tname);
285
286         fh_copy(&resp->dirfh, &argp->ffh);
287         fh_init(&resp->fh, NFS3_FHSIZE);
288         nfserr = nfsd_symlink(rqstp, &resp->dirfh, argp->fname, argp->flen,
289                                                    argp->tname, &resp->fh);
290         RETURN_STATUS(nfserr);
291 }
292
293 /*
294  * Make socket/fifo/device.
295  */
296 static __be32
297 nfsd3_proc_mknod(struct svc_rqst *rqstp)
298 {
299         struct nfsd3_mknodargs *argp = rqstp->rq_argp;
300         struct nfsd3_diropres  *resp = rqstp->rq_resp;
301         __be32  nfserr;
302         int type;
303         dev_t   rdev = 0;
304
305         dprintk("nfsd: MKNOD(3)    %s %.*s\n",
306                                 SVCFH_fmt(&argp->fh),
307                                 argp->len,
308                                 argp->name);
309
310         fh_copy(&resp->dirfh, &argp->fh);
311         fh_init(&resp->fh, NFS3_FHSIZE);
312
313         if (argp->ftype == 0 || argp->ftype >= NF3BAD)
314                 RETURN_STATUS(nfserr_inval);
315         if (argp->ftype == NF3CHR || argp->ftype == NF3BLK) {
316                 rdev = MKDEV(argp->major, argp->minor);
317                 if (MAJOR(rdev) != argp->major ||
318                     MINOR(rdev) != argp->minor)
319                         RETURN_STATUS(nfserr_inval);
320         } else
321                 if (argp->ftype != NF3SOCK && argp->ftype != NF3FIFO)
322                         RETURN_STATUS(nfserr_inval);
323
324         type = nfs3_ftypes[argp->ftype];
325         nfserr = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len,
326                                     &argp->attrs, type, rdev, &resp->fh);
327         fh_unlock(&resp->dirfh);
328         RETURN_STATUS(nfserr);
329 }
330
331 /*
332  * Remove file/fifo/socket etc.
333  */
334 static __be32
335 nfsd3_proc_remove(struct svc_rqst *rqstp)
336 {
337         struct nfsd3_diropargs *argp = rqstp->rq_argp;
338         struct nfsd3_attrstat *resp = rqstp->rq_resp;
339         __be32  nfserr;
340
341         dprintk("nfsd: REMOVE(3)   %s %.*s\n",
342                                 SVCFH_fmt(&argp->fh),
343                                 argp->len,
344                                 argp->name);
345
346         /* Unlink. -S_IFDIR means file must not be a directory */
347         fh_copy(&resp->fh, &argp->fh);
348         nfserr = nfsd_unlink(rqstp, &resp->fh, -S_IFDIR, argp->name, argp->len);
349         fh_unlock(&resp->fh);
350         RETURN_STATUS(nfserr);
351 }
352
353 /*
354  * Remove a directory
355  */
356 static __be32
357 nfsd3_proc_rmdir(struct svc_rqst *rqstp)
358 {
359         struct nfsd3_diropargs *argp = rqstp->rq_argp;
360         struct nfsd3_attrstat *resp = rqstp->rq_resp;
361         __be32  nfserr;
362
363         dprintk("nfsd: RMDIR(3)    %s %.*s\n",
364                                 SVCFH_fmt(&argp->fh),
365                                 argp->len,
366                                 argp->name);
367
368         fh_copy(&resp->fh, &argp->fh);
369         nfserr = nfsd_unlink(rqstp, &resp->fh, S_IFDIR, argp->name, argp->len);
370         fh_unlock(&resp->fh);
371         RETURN_STATUS(nfserr);
372 }
373
374 static __be32
375 nfsd3_proc_rename(struct svc_rqst *rqstp)
376 {
377         struct nfsd3_renameargs *argp = rqstp->rq_argp;
378         struct nfsd3_renameres *resp = rqstp->rq_resp;
379         __be32  nfserr;
380
381         dprintk("nfsd: RENAME(3)   %s %.*s ->\n",
382                                 SVCFH_fmt(&argp->ffh),
383                                 argp->flen,
384                                 argp->fname);
385         dprintk("nfsd: -> %s %.*s\n",
386                                 SVCFH_fmt(&argp->tfh),
387                                 argp->tlen,
388                                 argp->tname);
389
390         fh_copy(&resp->ffh, &argp->ffh);
391         fh_copy(&resp->tfh, &argp->tfh);
392         nfserr = nfsd_rename(rqstp, &resp->ffh, argp->fname, argp->flen,
393                                     &resp->tfh, argp->tname, argp->tlen);
394         RETURN_STATUS(nfserr);
395 }
396
397 static __be32
398 nfsd3_proc_link(struct svc_rqst *rqstp)
399 {
400         struct nfsd3_linkargs *argp = rqstp->rq_argp;
401         struct nfsd3_linkres  *resp = rqstp->rq_resp;
402         __be32  nfserr;
403
404         dprintk("nfsd: LINK(3)     %s ->\n",
405                                 SVCFH_fmt(&argp->ffh));
406         dprintk("nfsd:   -> %s %.*s\n",
407                                 SVCFH_fmt(&argp->tfh),
408                                 argp->tlen,
409                                 argp->tname);
410
411         fh_copy(&resp->fh,  &argp->ffh);
412         fh_copy(&resp->tfh, &argp->tfh);
413         nfserr = nfsd_link(rqstp, &resp->tfh, argp->tname, argp->tlen,
414                                   &resp->fh);
415         RETURN_STATUS(nfserr);
416 }
417
418 /*
419  * Read a portion of a directory.
420  */
421 static __be32
422 nfsd3_proc_readdir(struct svc_rqst *rqstp)
423 {
424         struct nfsd3_readdirargs *argp = rqstp->rq_argp;
425         struct nfsd3_readdirres  *resp = rqstp->rq_resp;
426         __be32          nfserr;
427         int             count;
428
429         dprintk("nfsd: READDIR(3)  %s %d bytes at %d\n",
430                                 SVCFH_fmt(&argp->fh),
431                                 argp->count, (u32) argp->cookie);
432
433         /* Make sure we've room for the NULL ptr & eof flag, and shrink to
434          * client read size */
435         count = (argp->count >> 2) - 2;
436
437         /* Read directory and encode entries on the fly */
438         fh_copy(&resp->fh, &argp->fh);
439
440         resp->buflen = count;
441         resp->common.err = nfs_ok;
442         resp->buffer = argp->buffer;
443         resp->rqstp = rqstp;
444         nfserr = nfsd_readdir(rqstp, &resp->fh, (loff_t*) &argp->cookie, 
445                                         &resp->common, nfs3svc_encode_entry);
446         memcpy(resp->verf, argp->verf, 8);
447         resp->count = resp->buffer - argp->buffer;
448         if (resp->offset)
449                 xdr_encode_hyper(resp->offset, argp->cookie);
450
451         RETURN_STATUS(nfserr);
452 }
453
454 /*
455  * Read a portion of a directory, including file handles and attrs.
456  * For now, we choose to ignore the dircount parameter.
457  */
458 static __be32
459 nfsd3_proc_readdirplus(struct svc_rqst *rqstp)
460 {
461         struct nfsd3_readdirargs *argp = rqstp->rq_argp;
462         struct nfsd3_readdirres  *resp = rqstp->rq_resp;
463         __be32  nfserr;
464         int     count = 0;
465         loff_t  offset;
466         struct page **p;
467         caddr_t page_addr = NULL;
468
469         dprintk("nfsd: READDIR+(3) %s %d bytes at %d\n",
470                                 SVCFH_fmt(&argp->fh),
471                                 argp->count, (u32) argp->cookie);
472
473         /* Convert byte count to number of words (i.e. >> 2),
474          * and reserve room for the NULL ptr & eof flag (-2 words) */
475         resp->count = (argp->count >> 2) - 2;
476
477         /* Read directory and encode entries on the fly */
478         fh_copy(&resp->fh, &argp->fh);
479
480         resp->common.err = nfs_ok;
481         resp->buffer = argp->buffer;
482         resp->buflen = resp->count;
483         resp->rqstp = rqstp;
484         offset = argp->cookie;
485
486         nfserr = fh_verify(rqstp, &resp->fh, S_IFDIR, NFSD_MAY_NOP);
487         if (nfserr)
488                 RETURN_STATUS(nfserr);
489
490         if (resp->fh.fh_export->ex_flags & NFSEXP_NOREADDIRPLUS)
491                 RETURN_STATUS(nfserr_notsupp);
492
493         nfserr = nfsd_readdir(rqstp, &resp->fh,
494                                      &offset,
495                                      &resp->common,
496                                      nfs3svc_encode_entry_plus);
497         memcpy(resp->verf, argp->verf, 8);
498         for (p = rqstp->rq_respages + 1; p < rqstp->rq_next_page; p++) {
499                 page_addr = page_address(*p);
500
501                 if (((caddr_t)resp->buffer >= page_addr) &&
502                     ((caddr_t)resp->buffer < page_addr + PAGE_SIZE)) {
503                         count += (caddr_t)resp->buffer - page_addr;
504                         break;
505                 }
506                 count += PAGE_SIZE;
507         }
508         resp->count = count >> 2;
509         if (resp->offset) {
510                 if (unlikely(resp->offset1)) {
511                         /* we ended up with offset on a page boundary */
512                         *resp->offset = htonl(offset >> 32);
513                         *resp->offset1 = htonl(offset & 0xffffffff);
514                         resp->offset1 = NULL;
515                 } else {
516                         xdr_encode_hyper(resp->offset, offset);
517                 }
518         }
519
520         RETURN_STATUS(nfserr);
521 }
522
523 /*
524  * Get file system stats
525  */
526 static __be32
527 nfsd3_proc_fsstat(struct svc_rqst *rqstp)
528 {
529         struct nfsd_fhandle *argp = rqstp->rq_argp;
530         struct nfsd3_fsstatres *resp = rqstp->rq_resp;
531         __be32  nfserr;
532
533         dprintk("nfsd: FSSTAT(3)   %s\n",
534                                 SVCFH_fmt(&argp->fh));
535
536         nfserr = nfsd_statfs(rqstp, &argp->fh, &resp->stats, 0);
537         fh_put(&argp->fh);
538         RETURN_STATUS(nfserr);
539 }
540
541 /*
542  * Get file system info
543  */
544 static __be32
545 nfsd3_proc_fsinfo(struct svc_rqst *rqstp)
546 {
547         struct nfsd_fhandle *argp = rqstp->rq_argp;
548         struct nfsd3_fsinfores *resp = rqstp->rq_resp;
549         __be32  nfserr;
550         u32     max_blocksize = svc_max_payload(rqstp);
551
552         dprintk("nfsd: FSINFO(3)   %s\n",
553                                 SVCFH_fmt(&argp->fh));
554
555         resp->f_rtmax  = max_blocksize;
556         resp->f_rtpref = max_blocksize;
557         resp->f_rtmult = PAGE_SIZE;
558         resp->f_wtmax  = max_blocksize;
559         resp->f_wtpref = max_blocksize;
560         resp->f_wtmult = PAGE_SIZE;
561         resp->f_dtpref = PAGE_SIZE;
562         resp->f_maxfilesize = ~(u32) 0;
563         resp->f_properties = NFS3_FSF_DEFAULT;
564
565         nfserr = fh_verify(rqstp, &argp->fh, 0,
566                         NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT);
567
568         /* Check special features of the file system. May request
569          * different read/write sizes for file systems known to have
570          * problems with large blocks */
571         if (nfserr == 0) {
572                 struct super_block *sb = argp->fh.fh_dentry->d_sb;
573
574                 /* Note that we don't care for remote fs's here */
575                 if (sb->s_magic == MSDOS_SUPER_MAGIC) {
576                         resp->f_properties = NFS3_FSF_BILLYBOY;
577                 }
578                 resp->f_maxfilesize = sb->s_maxbytes;
579         }
580
581         fh_put(&argp->fh);
582         RETURN_STATUS(nfserr);
583 }
584
585 /*
586  * Get pathconf info for the specified file
587  */
588 static __be32
589 nfsd3_proc_pathconf(struct svc_rqst *rqstp)
590 {
591         struct nfsd_fhandle *argp = rqstp->rq_argp;
592         struct nfsd3_pathconfres *resp = rqstp->rq_resp;
593         __be32  nfserr;
594
595         dprintk("nfsd: PATHCONF(3) %s\n",
596                                 SVCFH_fmt(&argp->fh));
597
598         /* Set default pathconf */
599         resp->p_link_max = 255;         /* at least */
600         resp->p_name_max = 255;         /* at least */
601         resp->p_no_trunc = 0;
602         resp->p_chown_restricted = 1;
603         resp->p_case_insensitive = 0;
604         resp->p_case_preserving = 1;
605
606         nfserr = fh_verify(rqstp, &argp->fh, 0, NFSD_MAY_NOP);
607
608         if (nfserr == 0) {
609                 struct super_block *sb = argp->fh.fh_dentry->d_sb;
610
611                 /* Note that we don't care for remote fs's here */
612                 switch (sb->s_magic) {
613                 case EXT2_SUPER_MAGIC:
614                         resp->p_link_max = EXT2_LINK_MAX;
615                         resp->p_name_max = EXT2_NAME_LEN;
616                         break;
617                 case MSDOS_SUPER_MAGIC:
618                         resp->p_case_insensitive = 1;
619                         resp->p_case_preserving  = 0;
620                         break;
621                 }
622         }
623
624         fh_put(&argp->fh);
625         RETURN_STATUS(nfserr);
626 }
627
628
629 /*
630  * Commit a file (range) to stable storage.
631  */
632 static __be32
633 nfsd3_proc_commit(struct svc_rqst *rqstp)
634 {
635         struct nfsd3_commitargs *argp = rqstp->rq_argp;
636         struct nfsd3_commitres *resp = rqstp->rq_resp;
637         __be32  nfserr;
638
639         dprintk("nfsd: COMMIT(3)   %s %u@%Lu\n",
640                                 SVCFH_fmt(&argp->fh),
641                                 argp->count,
642                                 (unsigned long long) argp->offset);
643
644         if (argp->offset > NFS_OFFSET_MAX)
645                 RETURN_STATUS(nfserr_inval);
646
647         fh_copy(&resp->fh, &argp->fh);
648         nfserr = nfsd_commit(rqstp, &resp->fh, argp->offset, argp->count);
649
650         RETURN_STATUS(nfserr);
651 }
652
653
654 /*
655  * NFSv3 Server procedures.
656  * Only the results of non-idempotent operations are cached.
657  */
658 #define nfs3svc_decode_fhandleargs      nfs3svc_decode_fhandle
659 #define nfs3svc_encode_attrstatres      nfs3svc_encode_attrstat
660 #define nfs3svc_encode_wccstatres       nfs3svc_encode_wccstat
661 #define nfsd3_mkdirargs                 nfsd3_createargs
662 #define nfsd3_readdirplusargs           nfsd3_readdirargs
663 #define nfsd3_fhandleargs               nfsd_fhandle
664 #define nfsd3_fhandleres                nfsd3_attrstat
665 #define nfsd3_attrstatres               nfsd3_attrstat
666 #define nfsd3_wccstatres                nfsd3_attrstat
667 #define nfsd3_createres                 nfsd3_diropres
668 #define nfsd3_voidres                   nfsd3_voidargs
669 struct nfsd3_voidargs { int dummy; };
670
671 #define ST 1            /* status*/
672 #define FH 17           /* filehandle with length */
673 #define AT 21           /* attributes */
674 #define pAT (1+AT)      /* post attributes - conditional */
675 #define WC (7+pAT)      /* WCC attributes */
676
677 static const struct svc_procedure nfsd_procedures3[22] = {
678         [NFS3PROC_NULL] = {
679                 .pc_func = nfsd3_proc_null,
680                 .pc_encode = nfs3svc_encode_voidres,
681                 .pc_argsize = sizeof(struct nfsd3_voidargs),
682                 .pc_ressize = sizeof(struct nfsd3_voidres),
683                 .pc_cachetype = RC_NOCACHE,
684                 .pc_xdrressize = ST,
685         },
686         [NFS3PROC_GETATTR] = {
687                 .pc_func = nfsd3_proc_getattr,
688                 .pc_decode = nfs3svc_decode_fhandleargs,
689                 .pc_encode = nfs3svc_encode_attrstatres,
690                 .pc_release = nfs3svc_release_fhandle,
691                 .pc_argsize = sizeof(struct nfsd3_fhandleargs),
692                 .pc_ressize = sizeof(struct nfsd3_attrstatres),
693                 .pc_cachetype = RC_NOCACHE,
694                 .pc_xdrressize = ST+AT,
695         },
696         [NFS3PROC_SETATTR] = {
697                 .pc_func = nfsd3_proc_setattr,
698                 .pc_decode = nfs3svc_decode_sattrargs,
699                 .pc_encode = nfs3svc_encode_wccstatres,
700                 .pc_release = nfs3svc_release_fhandle,
701                 .pc_argsize = sizeof(struct nfsd3_sattrargs),
702                 .pc_ressize = sizeof(struct nfsd3_wccstatres),
703                 .pc_cachetype = RC_REPLBUFF,
704                 .pc_xdrressize = ST+WC,
705         },
706         [NFS3PROC_LOOKUP] = {
707                 .pc_func = nfsd3_proc_lookup,
708                 .pc_decode = nfs3svc_decode_diropargs,
709                 .pc_encode = nfs3svc_encode_diropres,
710                 .pc_release = nfs3svc_release_fhandle2,
711                 .pc_argsize = sizeof(struct nfsd3_diropargs),
712                 .pc_ressize = sizeof(struct nfsd3_diropres),
713                 .pc_cachetype = RC_NOCACHE,
714                 .pc_xdrressize = ST+FH+pAT+pAT,
715         },
716         [NFS3PROC_ACCESS] = {
717                 .pc_func = nfsd3_proc_access,
718                 .pc_decode = nfs3svc_decode_accessargs,
719                 .pc_encode = nfs3svc_encode_accessres,
720                 .pc_release = nfs3svc_release_fhandle,
721                 .pc_argsize = sizeof(struct nfsd3_accessargs),
722                 .pc_ressize = sizeof(struct nfsd3_accessres),
723                 .pc_cachetype = RC_NOCACHE,
724                 .pc_xdrressize = ST+pAT+1,
725         },
726         [NFS3PROC_READLINK] = {
727                 .pc_func = nfsd3_proc_readlink,
728                 .pc_decode = nfs3svc_decode_readlinkargs,
729                 .pc_encode = nfs3svc_encode_readlinkres,
730                 .pc_release = nfs3svc_release_fhandle,
731                 .pc_argsize = sizeof(struct nfsd3_readlinkargs),
732                 .pc_ressize = sizeof(struct nfsd3_readlinkres),
733                 .pc_cachetype = RC_NOCACHE,
734                 .pc_xdrressize = ST+pAT+1+NFS3_MAXPATHLEN/4,
735         },
736         [NFS3PROC_READ] = {
737                 .pc_func = nfsd3_proc_read,
738                 .pc_decode = nfs3svc_decode_readargs,
739                 .pc_encode = nfs3svc_encode_readres,
740                 .pc_release = nfs3svc_release_fhandle,
741                 .pc_argsize = sizeof(struct nfsd3_readargs),
742                 .pc_ressize = sizeof(struct nfsd3_readres),
743                 .pc_cachetype = RC_NOCACHE,
744                 .pc_xdrressize = ST+pAT+4+NFSSVC_MAXBLKSIZE/4,
745         },
746         [NFS3PROC_WRITE] = {
747                 .pc_func = nfsd3_proc_write,
748                 .pc_decode = nfs3svc_decode_writeargs,
749                 .pc_encode = nfs3svc_encode_writeres,
750                 .pc_release = nfs3svc_release_fhandle,
751                 .pc_argsize = sizeof(struct nfsd3_writeargs),
752                 .pc_ressize = sizeof(struct nfsd3_writeres),
753                 .pc_cachetype = RC_REPLBUFF,
754                 .pc_xdrressize = ST+WC+4,
755         },
756         [NFS3PROC_CREATE] = {
757                 .pc_func = nfsd3_proc_create,
758                 .pc_decode = nfs3svc_decode_createargs,
759                 .pc_encode = nfs3svc_encode_createres,
760                 .pc_release = nfs3svc_release_fhandle2,
761                 .pc_argsize = sizeof(struct nfsd3_createargs),
762                 .pc_ressize = sizeof(struct nfsd3_createres),
763                 .pc_cachetype = RC_REPLBUFF,
764                 .pc_xdrressize = ST+(1+FH+pAT)+WC,
765         },
766         [NFS3PROC_MKDIR] = {
767                 .pc_func = nfsd3_proc_mkdir,
768                 .pc_decode = nfs3svc_decode_mkdirargs,
769                 .pc_encode = nfs3svc_encode_createres,
770                 .pc_release = nfs3svc_release_fhandle2,
771                 .pc_argsize = sizeof(struct nfsd3_mkdirargs),
772                 .pc_ressize = sizeof(struct nfsd3_createres),
773                 .pc_cachetype = RC_REPLBUFF,
774                 .pc_xdrressize = ST+(1+FH+pAT)+WC,
775         },
776         [NFS3PROC_SYMLINK] = {
777                 .pc_func = nfsd3_proc_symlink,
778                 .pc_decode = nfs3svc_decode_symlinkargs,
779                 .pc_encode = nfs3svc_encode_createres,
780                 .pc_release = nfs3svc_release_fhandle2,
781                 .pc_argsize = sizeof(struct nfsd3_symlinkargs),
782                 .pc_ressize = sizeof(struct nfsd3_createres),
783                 .pc_cachetype = RC_REPLBUFF,
784                 .pc_xdrressize = ST+(1+FH+pAT)+WC,
785         },
786         [NFS3PROC_MKNOD] = {
787                 .pc_func = nfsd3_proc_mknod,
788                 .pc_decode = nfs3svc_decode_mknodargs,
789                 .pc_encode = nfs3svc_encode_createres,
790                 .pc_release = nfs3svc_release_fhandle2,
791                 .pc_argsize = sizeof(struct nfsd3_mknodargs),
792                 .pc_ressize = sizeof(struct nfsd3_createres),
793                 .pc_cachetype = RC_REPLBUFF,
794                 .pc_xdrressize = ST+(1+FH+pAT)+WC,
795         },
796         [NFS3PROC_REMOVE] = {
797                 .pc_func = nfsd3_proc_remove,
798                 .pc_decode = nfs3svc_decode_diropargs,
799                 .pc_encode = nfs3svc_encode_wccstatres,
800                 .pc_release = nfs3svc_release_fhandle,
801                 .pc_argsize = sizeof(struct nfsd3_diropargs),
802                 .pc_ressize = sizeof(struct nfsd3_wccstatres),
803                 .pc_cachetype = RC_REPLBUFF,
804                 .pc_xdrressize = ST+WC,
805         },
806         [NFS3PROC_RMDIR] = {
807                 .pc_func = nfsd3_proc_rmdir,
808                 .pc_decode = nfs3svc_decode_diropargs,
809                 .pc_encode = nfs3svc_encode_wccstatres,
810                 .pc_release = nfs3svc_release_fhandle,
811                 .pc_argsize = sizeof(struct nfsd3_diropargs),
812                 .pc_ressize = sizeof(struct nfsd3_wccstatres),
813                 .pc_cachetype = RC_REPLBUFF,
814                 .pc_xdrressize = ST+WC,
815         },
816         [NFS3PROC_RENAME] = {
817                 .pc_func = nfsd3_proc_rename,
818                 .pc_decode = nfs3svc_decode_renameargs,
819                 .pc_encode = nfs3svc_encode_renameres,
820                 .pc_release = nfs3svc_release_fhandle2,
821                 .pc_argsize = sizeof(struct nfsd3_renameargs),
822                 .pc_ressize = sizeof(struct nfsd3_renameres),
823                 .pc_cachetype = RC_REPLBUFF,
824                 .pc_xdrressize = ST+WC+WC,
825         },
826         [NFS3PROC_LINK] = {
827                 .pc_func = nfsd3_proc_link,
828                 .pc_decode = nfs3svc_decode_linkargs,
829                 .pc_encode = nfs3svc_encode_linkres,
830                 .pc_release = nfs3svc_release_fhandle2,
831                 .pc_argsize = sizeof(struct nfsd3_linkargs),
832                 .pc_ressize = sizeof(struct nfsd3_linkres),
833                 .pc_cachetype = RC_REPLBUFF,
834                 .pc_xdrressize = ST+pAT+WC,
835         },
836         [NFS3PROC_READDIR] = {
837                 .pc_func = nfsd3_proc_readdir,
838                 .pc_decode = nfs3svc_decode_readdirargs,
839                 .pc_encode = nfs3svc_encode_readdirres,
840                 .pc_release = nfs3svc_release_fhandle,
841                 .pc_argsize = sizeof(struct nfsd3_readdirargs),
842                 .pc_ressize = sizeof(struct nfsd3_readdirres),
843                 .pc_cachetype = RC_NOCACHE,
844         },
845         [NFS3PROC_READDIRPLUS] = {
846                 .pc_func = nfsd3_proc_readdirplus,
847                 .pc_decode = nfs3svc_decode_readdirplusargs,
848                 .pc_encode = nfs3svc_encode_readdirres,
849                 .pc_release = nfs3svc_release_fhandle,
850                 .pc_argsize = sizeof(struct nfsd3_readdirplusargs),
851                 .pc_ressize = sizeof(struct nfsd3_readdirres),
852                 .pc_cachetype = RC_NOCACHE,
853         },
854         [NFS3PROC_FSSTAT] = {
855                 .pc_func = nfsd3_proc_fsstat,
856                 .pc_decode = nfs3svc_decode_fhandleargs,
857                 .pc_encode = nfs3svc_encode_fsstatres,
858                 .pc_argsize = sizeof(struct nfsd3_fhandleargs),
859                 .pc_ressize = sizeof(struct nfsd3_fsstatres),
860                 .pc_cachetype = RC_NOCACHE,
861                 .pc_xdrressize = ST+pAT+2*6+1,
862         },
863         [NFS3PROC_FSINFO] = {
864                 .pc_func = nfsd3_proc_fsinfo,
865                 .pc_decode = nfs3svc_decode_fhandleargs,
866                 .pc_encode = nfs3svc_encode_fsinfores,
867                 .pc_argsize = sizeof(struct nfsd3_fhandleargs),
868                 .pc_ressize = sizeof(struct nfsd3_fsinfores),
869                 .pc_cachetype = RC_NOCACHE,
870                 .pc_xdrressize = ST+pAT+12,
871         },
872         [NFS3PROC_PATHCONF] = {
873                 .pc_func = nfsd3_proc_pathconf,
874                 .pc_decode = nfs3svc_decode_fhandleargs,
875                 .pc_encode = nfs3svc_encode_pathconfres,
876                 .pc_argsize = sizeof(struct nfsd3_fhandleargs),
877                 .pc_ressize = sizeof(struct nfsd3_pathconfres),
878                 .pc_cachetype = RC_NOCACHE,
879                 .pc_xdrressize = ST+pAT+6,
880         },
881         [NFS3PROC_COMMIT] = {
882                 .pc_func = nfsd3_proc_commit,
883                 .pc_decode = nfs3svc_decode_commitargs,
884                 .pc_encode = nfs3svc_encode_commitres,
885                 .pc_release = nfs3svc_release_fhandle,
886                 .pc_argsize = sizeof(struct nfsd3_commitargs),
887                 .pc_ressize = sizeof(struct nfsd3_commitres),
888                 .pc_cachetype = RC_NOCACHE,
889                 .pc_xdrressize = ST+WC+2,
890         },
891 };
892
893 static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures3)];
894 const struct svc_version nfsd_version3 = {
895         .vs_vers        = 3,
896         .vs_nproc       = 22,
897         .vs_proc        = nfsd_procedures3,
898         .vs_dispatch    = nfsd_dispatch,
899         .vs_count       = nfsd_count3,
900         .vs_xdrsize     = NFS3_SVC_XDRSIZE,
901 };