Linux kernel & device driver programming

Cross-Referenced Linux and Device Driver Code

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Version: [ 2.6.11.8 ] [ 2.6.25 ] [ 2.6.25.8 ] [ 2.6.31.13 ] Architecture: [ i386 ]
  1 /*
  2  * linux/fs/nfsd/nfs3proc.c
  3  *
  4  * Process version 3 NFS requests.
  5  *
  6  * Copyright (C) 1996, 1997, 1998 Olaf Kirch <okir@monad.swb.de>
  7  */
  8 
  9 #include <linux/linkage.h>
 10 #include <linux/time.h>
 11 #include <linux/errno.h>
 12 #include <linux/fs.h>
 13 #include <linux/ext2_fs.h>
 14 #include <linux/stat.h>
 15 #include <linux/fcntl.h>
 16 #include <linux/net.h>
 17 #include <linux/in.h>
 18 #include <linux/unistd.h>
 19 #include <linux/slab.h>
 20 #include <linux/major.h>
 21 
 22 #include <linux/sunrpc/svc.h>
 23 #include <linux/nfsd/nfsd.h>
 24 #include <linux/nfsd/cache.h>
 25 #include <linux/nfsd/xdr3.h>
 26 #include <linux/nfs3.h>
 27 
 28 #define NFSDDBG_FACILITY                NFSDDBG_PROC
 29 
 30 #define RETURN_STATUS(st)       { resp->status = (st); return (st); }
 31 
 32 static int      nfs3_ftypes[] = {
 33         0,                      /* NF3NON */
 34         S_IFREG,                /* NF3REG */
 35         S_IFDIR,                /* NF3DIR */
 36         S_IFBLK,                /* NF3BLK */
 37         S_IFCHR,                /* NF3CHR */
 38         S_IFLNK,                /* NF3LNK */
 39         S_IFSOCK,               /* NF3SOCK */
 40         S_IFIFO,                /* NF3FIFO */
 41 };
 42 
 43 /*
 44  * NULL call.
 45  */
 46 static int
 47 nfsd3_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
 48 {
 49         return nfs_ok;
 50 }
 51 
 52 /*
 53  * Get a file's attributes
 54  */
 55 static int
 56 nfsd3_proc_getattr(struct svc_rqst *rqstp, struct nfsd_fhandle  *argp,
 57                                            struct nfsd3_attrstat *resp)
 58 {
 59         int     nfserr;
 60 
 61         dprintk("nfsd: GETATTR(3)  %s\n",
 62                                 SVCFH_fmt(&argp->fh));
 63 
 64         fh_copy(&resp->fh, &argp->fh);
 65         nfserr = fh_verify(rqstp, &resp->fh, 0, MAY_NOP);
 66         RETURN_STATUS(nfserr);
 67 }
 68 
 69 /*
 70  * Set a file's attributes
 71  */
 72 static int
 73 nfsd3_proc_setattr(struct svc_rqst *rqstp, struct nfsd3_sattrargs *argp,
 74                                            struct nfsd3_attrstat  *resp)
 75 {
 76         int     nfserr;
 77 
 78         dprintk("nfsd: SETATTR(3)  %s\n",
 79                                 SVCFH_fmt(&argp->fh));
 80 
 81         fh_copy(&resp->fh, &argp->fh);
 82         nfserr = nfsd_setattr(rqstp, &resp->fh, &argp->attrs,
 83                               argp->check_guard, argp->guardtime);
 84         RETURN_STATUS(nfserr);
 85 }
 86 
 87 /*
 88  * Look up a path name component
 89  */
 90 static int
 91 nfsd3_proc_lookup(struct svc_rqst *rqstp, struct nfsd3_diropargs *argp,
 92                                           struct nfsd3_diropres  *resp)
 93 {
 94         int     nfserr;
 95 
 96         dprintk("nfsd: LOOKUP(3)   %s %.*s\n",
 97                                 SVCFH_fmt(&argp->fh),
 98                                 argp->len,
 99                                 argp->name);
100 
101         fh_copy(&resp->dirfh, &argp->fh);
102         fh_init(&resp->fh, NFS3_FHSIZE);
103 
104         nfserr = nfsd_lookup(rqstp, &resp->dirfh,
105                                     argp->name,
106                                     argp->len,
107                                     &resp->fh);
108         RETURN_STATUS(nfserr);
109 }
110 
111 /*
112  * Check file access
113  */
114 static int
115 nfsd3_proc_access(struct svc_rqst *rqstp, struct nfsd3_accessargs *argp,
116                                           struct nfsd3_accessres *resp)
117 {
118         int     nfserr;
119 
120         dprintk("nfsd: ACCESS(3)   %s 0x%x\n",
121                                 SVCFH_fmt(&argp->fh),
122                                 argp->access);
123 
124         fh_copy(&resp->fh, &argp->fh);
125         resp->access = argp->access;
126         nfserr = nfsd_access(rqstp, &resp->fh, &resp->access, NULL);
127         RETURN_STATUS(nfserr);
128 }
129 
130 /*
131  * Read a symlink.
132  */
133 static int
134 nfsd3_proc_readlink(struct svc_rqst *rqstp, struct nfsd3_readlinkargs *argp,
135                                            struct nfsd3_readlinkres *resp)
136 {
137         int nfserr;
138 
139         dprintk("nfsd: READLINK(3) %s\n", SVCFH_fmt(&argp->fh));
140 
141         /* Read the symlink. */
142         fh_copy(&resp->fh, &argp->fh);
143         resp->len = NFS3_MAXPATHLEN;
144         nfserr = nfsd_readlink(rqstp, &resp->fh, argp->buffer, &resp->len);
145         RETURN_STATUS(nfserr);
146 }
147 
148 /*
149  * Read a portion of a file.
150  */
151 static int
152 nfsd3_proc_read(struct svc_rqst *rqstp, struct nfsd3_readargs *argp,
153                                         struct nfsd3_readres  *resp)
154 {
155         int     nfserr;
156 
157         dprintk("nfsd: READ(3) %s %lu bytes at %lu\n",
158                                 SVCFH_fmt(&argp->fh),
159                                 (unsigned long) argp->count,
160                                 (unsigned long) argp->offset);
161 
162         /* Obtain buffer pointer for payload.
163          * 1 (status) + 22 (post_op_attr) + 1 (count) + 1 (eof)
164          * + 1 (xdr opaque byte count) = 26
165          */
166 
167         resp->count = argp->count;
168         if (NFSSVC_MAXBLKSIZE < resp->count)
169                 resp->count = NFSSVC_MAXBLKSIZE;
170 
171         svc_reserve(rqstp, ((1 + NFS3_POST_OP_ATTR_WORDS + 3)<<2) + resp->count +4);
172 
173         fh_copy(&resp->fh, &argp->fh);
174         nfserr = nfsd_read(rqstp, &resp->fh,
175                                   argp->offset,
176                                   argp->vec, argp->vlen,
177                                   &resp->count);
178         if (nfserr == 0) {
179                 struct inode    *inode = resp->fh.fh_dentry->d_inode;
180 
181                 resp->eof = (argp->offset + resp->count) >= inode->i_size;
182         }
183 
184         RETURN_STATUS(nfserr);
185 }
186 
187 /*
188  * Write data to a file
189  */
190 static int
191 nfsd3_proc_write(struct svc_rqst *rqstp, struct nfsd3_writeargs *argp,
192                                          struct nfsd3_writeres  *resp)
193 {
194         int     nfserr;
195 
196         dprintk("nfsd: WRITE(3)    %s %d bytes at %ld%s\n",
197                                 SVCFH_fmt(&argp->fh),
198                                 argp->len,
199                                 (unsigned long) argp->offset,
200                                 argp->stable? " stable" : "");
201 
202         fh_copy(&resp->fh, &argp->fh);
203         resp->committed = argp->stable;
204         nfserr = nfsd_write(rqstp, &resp->fh,
205                                    argp->offset,
206                                    argp->vec, argp->vlen,
207                                    argp->len,
208                                    &resp->committed);
209         resp->count = argp->count;
210         RETURN_STATUS(nfserr);
211 }
212 
213 /*
214  * With NFSv3, CREATE processing is a lot easier than with NFSv2.
215  * At least in theory; we'll see how it fares in practice when the
216  * first reports about SunOS compatibility problems start to pour in...
217  */
218 static int
219 nfsd3_proc_create(struct svc_rqst *rqstp, struct nfsd3_createargs *argp,
220                                           struct nfsd3_diropres   *resp)
221 {
222         svc_fh          *dirfhp, *newfhp = NULL;
223         struct iattr    *attr;
224         u32             nfserr;
225 
226         dprintk("nfsd: CREATE(3)   %s %.*s\n",
227                                 SVCFH_fmt(&argp->fh),
228                                 argp->len,
229                                 argp->name);
230 
231         dirfhp = fh_copy(&resp->dirfh, &argp->fh);
232         newfhp = fh_init(&resp->fh, NFS3_FHSIZE);
233         attr   = &argp->attrs;
234 
235         /* Get the directory inode */
236         nfserr = fh_verify(rqstp, dirfhp, S_IFDIR, MAY_CREATE);
237         if (nfserr)
238                 RETURN_STATUS(nfserr);
239 
240         /* Unfudge the mode bits */
241         attr->ia_mode &= ~S_IFMT;
242         if (!(attr->ia_valid & ATTR_MODE)) { 
243                 attr->ia_valid |= ATTR_MODE;
244                 attr->ia_mode = S_IFREG;
245         } else {
246                 attr->ia_mode = (attr->ia_mode & ~S_IFMT) | S_IFREG;
247         }
248 
249         /* Now create the file and set attributes */
250         nfserr = nfsd_create_v3(rqstp, dirfhp, argp->name, argp->len,
251                                 attr, newfhp,
252                                 argp->createmode, argp->verf, NULL);
253 
254         RETURN_STATUS(nfserr);
255 }
256 
257 /*
258  * Make directory. This operation is not idempotent.
259  */
260 static int
261 nfsd3_proc_mkdir(struct svc_rqst *rqstp, struct nfsd3_createargs *argp,
262                                          struct nfsd3_diropres   *resp)
263 {
264         int     nfserr;
265 
266         dprintk("nfsd: MKDIR(3)    %s %.*s\n",
267                                 SVCFH_fmt(&argp->fh),
268                                 argp->len,
269                                 argp->name);
270 
271         argp->attrs.ia_valid &= ~ATTR_SIZE;
272         fh_copy(&resp->dirfh, &argp->fh);
273         fh_init(&resp->fh, NFS3_FHSIZE);
274         nfserr = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len,
275                                     &argp->attrs, S_IFDIR, 0, &resp->fh);
276 
277         RETURN_STATUS(nfserr);
278 }
279 
280 static int
281 nfsd3_proc_symlink(struct svc_rqst *rqstp, struct nfsd3_symlinkargs *argp,
282                                            struct nfsd3_diropres    *resp)
283 {
284         int     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, argp->tlen,
295                                                    &resp->fh, &argp->attrs);
296         RETURN_STATUS(nfserr);
297 }
298 
299 /*
300  * Make socket/fifo/device.
301  */
302 static int
303 nfsd3_proc_mknod(struct svc_rqst *rqstp, struct nfsd3_mknodargs *argp,
304                                          struct nfsd3_diropres  *resp)
305 {
306         int     nfserr, type;
307         dev_t   rdev = 0;
308 
309         dprintk("nfsd: MKNOD(3)    %s %.*s\n",
310                                 SVCFH_fmt(&argp->fh),
311                                 argp->len,
312                                 argp->name);
313 
314         fh_copy(&resp->dirfh, &argp->fh);
315         fh_init(&resp->fh, NFS3_FHSIZE);
316 
317         if (argp->ftype == 0 || argp->ftype >= NF3BAD)
318                 RETURN_STATUS(nfserr_inval);
319         if (argp->ftype == NF3CHR || argp->ftype == NF3BLK) {
320                 rdev = MKDEV(argp->major, argp->minor);
321                 if (MAJOR(rdev) != argp->major ||
322                     MINOR(rdev) != argp->minor)
323                         RETURN_STATUS(nfserr_inval);
324         } else
325                 if (argp->ftype != NF3SOCK && argp->ftype != NF3FIFO)
326                         RETURN_STATUS(nfserr_inval);
327 
328         type = nfs3_ftypes[argp->ftype];
329         nfserr = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len,
330                                     &argp->attrs, type, rdev, &resp->fh);
331 
332         RETURN_STATUS(nfserr);
333 }
334 
335 /*
336  * Remove file/fifo/socket etc.
337  */
338 static int
339 nfsd3_proc_remove(struct svc_rqst *rqstp, struct nfsd3_diropargs *argp,
340                                           struct nfsd3_attrstat  *resp)
341 {
342         int     nfserr;
343 
344         dprintk("nfsd: REMOVE(3)   %s %.*s\n",
345                                 SVCFH_fmt(&argp->fh),
346                                 argp->len,
347                                 argp->name);
348 
349         /* Unlink. -S_IFDIR means file must not be a directory */
350         fh_copy(&resp->fh, &argp->fh);
351         nfserr = nfsd_unlink(rqstp, &resp->fh, -S_IFDIR, argp->name, argp->len);
352         RETURN_STATUS(nfserr);
353 }
354 
355 /*
356  * Remove a directory
357  */
358 static int
359 nfsd3_proc_rmdir(struct svc_rqst *rqstp, struct nfsd3_diropargs *argp,
360                                          struct nfsd3_attrstat  *resp)
361 {
362         int     nfserr;
363 
364         dprintk("nfsd: RMDIR(3)    %s %.*s\n",
365                                 SVCFH_fmt(&argp->fh),
366                                 argp->len,
367                                 argp->name);
368 
369         fh_copy(&resp->fh, &argp->fh);
370         nfserr = nfsd_unlink(rqstp, &resp->fh, S_IFDIR, argp->name, argp->len);
371         RETURN_STATUS(nfserr);
372 }
373 
374 static int
375 nfsd3_proc_rename(struct svc_rqst *rqstp, struct nfsd3_renameargs *argp,
376                                           struct nfsd3_renameres  *resp)
377 {
378         int     nfserr;
379 
380         dprintk("nfsd: RENAME(3)   %s %.*s ->\n",
381                                 SVCFH_fmt(&argp->ffh),
382                                 argp->flen,
383                                 argp->fname);
384         dprintk("nfsd: -> %s %.*s\n",
385                                 SVCFH_fmt(&argp->tfh),
386                                 argp->tlen,
387                                 argp->tname);
388 
389         fh_copy(&resp->ffh, &argp->ffh);
390         fh_copy(&resp->tfh, &argp->tfh);
391         nfserr = nfsd_rename(rqstp, &resp->ffh, argp->fname, argp->flen,
392                                     &resp->tfh, argp->tname, argp->tlen);
393         RETURN_STATUS(nfserr);
394 }
395 
396 static int
397 nfsd3_proc_link(struct svc_rqst *rqstp, struct nfsd3_linkargs *argp,
398                                         struct nfsd3_linkres  *resp)
399 {
400         int     nfserr;
401 
402         dprintk("nfsd: LINK(3)     %s ->\n",
403                                 SVCFH_fmt(&argp->ffh));
404         dprintk("nfsd:   -> %s %.*s\n",
405                                 SVCFH_fmt(&argp->tfh),
406                                 argp->tlen,
407                                 argp->tname);
408 
409         fh_copy(&resp->fh,  &argp->ffh);
410         fh_copy(&resp->tfh, &argp->tfh);
411         nfserr = nfsd_link(rqstp, &resp->tfh, argp->tname, argp->tlen,
412                                   &resp->fh);
413         RETURN_STATUS(nfserr);
414 }
415 
416 /*
417  * Read a portion of a directory.
418  */
419 static int
420 nfsd3_proc_readdir(struct svc_rqst *rqstp, struct nfsd3_readdirargs *argp,
421                                            struct nfsd3_readdirres  *resp)
422 {
423         int             nfserr, count;
424 
425         dprintk("nfsd: READDIR(3)  %s %d bytes at %d\n",
426                                 SVCFH_fmt(&argp->fh),
427                                 argp->count, (u32) argp->cookie);
428 
429         /* Make sure we've room for the NULL ptr & eof flag, and shrink to
430          * client read size */
431         count = (argp->count >> 2) - 2;
432 
433         /* Read directory and encode entries on the fly */
434         fh_copy(&resp->fh, &argp->fh);
435 
436         resp->buflen = count;
437         resp->common.err = nfs_ok;
438         resp->buffer = argp->buffer;
439         resp->rqstp = rqstp;
440         nfserr = nfsd_readdir(rqstp, &resp->fh, (loff_t*) &argp->cookie, 
441                                         &resp->common, nfs3svc_encode_entry);
442         memcpy(resp->verf, argp->verf, 8);
443         resp->count = resp->buffer - argp->buffer;
444         if (resp->offset)
445                 xdr_encode_hyper(resp->offset, argp->cookie);
446 
447         RETURN_STATUS(nfserr);
448 }
449 
450 /*
451  * Read a portion of a directory, including file handles and attrs.
452  * For now, we choose to ignore the dircount parameter.
453  */
454 static int
455 nfsd3_proc_readdirplus(struct svc_rqst *rqstp, struct nfsd3_readdirargs *argp,
456                                                struct nfsd3_readdirres  *resp)
457 {
458         int     nfserr, count = 0;
459         loff_t  offset;
460         int     i;
461         caddr_t page_addr = NULL;
462 
463         dprintk("nfsd: READDIR+(3) %s %d bytes at %d\n",
464                                 SVCFH_fmt(&argp->fh),
465                                 argp->count, (u32) argp->cookie);
466 
467         /* Convert byte count to number of words (i.e. >> 2),
468          * and reserve room for the NULL ptr & eof flag (-2 words) */
469         resp->count = (argp->count >> 2) - 2;
470 
471         /* Read directory and encode entries on the fly */
472         fh_copy(&resp->fh, &argp->fh);
473 
474         resp->common.err = nfs_ok;
475         resp->buffer = argp->buffer;
476         resp->buflen = resp->count;
477         resp->rqstp = rqstp;
478         offset = argp->cookie;
479         nfserr = nfsd_readdir(rqstp, &resp->fh,
480                                      &offset,
481                                      &resp->common,
482                                      nfs3svc_encode_entry_plus);
483         memcpy(resp->verf, argp->verf, 8);
484         for (i=1; i<rqstp->rq_resused ; i++) {
485                 page_addr = page_address(rqstp->rq_respages[i]);
486 
487                 if (((caddr_t)resp->buffer >= page_addr) &&
488                     ((caddr_t)resp->buffer < page_addr + PAGE_SIZE)) {
489                         count += (caddr_t)resp->buffer - page_addr;
490                         break;
491                 }
492                 count += PAGE_SIZE;
493         }
494         resp->count = count >> 2;
495         if (resp->offset) {
496                 if (unlikely(resp->offset1)) {
497                         /* we ended up with offset on a page boundary */
498                         *resp->offset = htonl(offset >> 32);
499                         *resp->offset1 = htonl(offset & 0xffffffff);
500                         resp->offset1 = NULL;
501                 } else {
502                         xdr_encode_hyper(resp->offset, offset);
503                 }
504         }
505 
506         RETURN_STATUS(nfserr);
507 }
508 
509 /*
510  * Get file system stats
511  */
512 static int
513 nfsd3_proc_fsstat(struct svc_rqst * rqstp, struct nfsd_fhandle    *argp,
514                                            struct nfsd3_fsstatres *resp)
515 {
516         int     nfserr;
517 
518         dprintk("nfsd: FSSTAT(3)   %s\n",
519                                 SVCFH_fmt(&argp->fh));
520 
521         nfserr = nfsd_statfs(rqstp, &argp->fh, &resp->stats);
522         fh_put(&argp->fh);
523         RETURN_STATUS(nfserr);
524 }
525 
526 /*
527  * Get file system info
528  */
529 static int
530 nfsd3_proc_fsinfo(struct svc_rqst * rqstp, struct nfsd_fhandle    *argp,
531                                            struct nfsd3_fsinfores *resp)
532 {
533         int     nfserr;
534 
535         dprintk("nfsd: FSINFO(3)   %s\n",
536                                 SVCFH_fmt(&argp->fh));
537 
538         resp->f_rtmax  = NFSSVC_MAXBLKSIZE;
539         resp->f_rtpref = NFSSVC_MAXBLKSIZE;
540         resp->f_rtmult = PAGE_SIZE;
541         resp->f_wtmax  = NFSSVC_MAXBLKSIZE;
542         resp->f_wtpref = NFSSVC_MAXBLKSIZE;
543         resp->f_wtmult = PAGE_SIZE;
544         resp->f_dtpref = PAGE_SIZE;
545         resp->f_maxfilesize = ~(u32) 0;
546         resp->f_properties = NFS3_FSF_DEFAULT;
547 
548         nfserr = fh_verify(rqstp, &argp->fh, 0, MAY_NOP);
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) {
554                 struct super_block *sb = argp->fh.fh_dentry->d_inode->i_sb;
555 
556                 /* Note that we don't care for remote fs's here */
557                 if (sb->s_magic == 0x4d44 /* MSDOS_SUPER_MAGIC */) {
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  */
570 static int
571 nfsd3_proc_pathconf(struct svc_rqst * rqstp, struct nfsd_fhandle      *argp,
572                                              struct nfsd3_pathconfres *resp)
573 {
574         int     nfserr;
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 
587         nfserr = fh_verify(rqstp, &argp->fh, 0, MAY_NOP);
588 
589         if (nfserr == 0) {
590                 struct super_block *sb = argp->fh.fh_dentry->d_inode->i_sb;
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;
598                 case 0x4d44:    /* MSDOS_SUPER_MAGIC */
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  */
613 static int
614 nfsd3_proc_commit(struct svc_rqst * rqstp, struct nfsd3_commitargs *argp,
615                                            struct nfsd3_commitres  *resp)
616 {
617         int     nfserr;
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  */
638 #define nfs3svc_decode_voidargs         NULL
639 #define nfs3svc_release_void            NULL
640 #define nfs3svc_decode_fhandleargs      nfs3svc_decode_fhandle
641 #define nfs3svc_encode_attrstatres      nfs3svc_encode_attrstat
642 #define nfs3svc_encode_wccstatres       nfs3svc_encode_wccstat
643 #define nfsd3_mkdirargs                 nfsd3_createargs
644 #define nfsd3_readdirplusargs           nfsd3_readdirargs
645 #define nfsd3_fhandleargs               nfsd_fhandle
646 #define nfsd3_fhandleres                nfsd3_attrstat
647 #define nfsd3_attrstatres               nfsd3_attrstat
648 #define nfsd3_wccstatres                nfsd3_attrstat
649 #define nfsd3_createres                 nfsd3_diropres
650 #define nfsd3_voidres                   nfsd3_voidargs
651 struct nfsd3_voidargs { int dummy; };
652 
653 #define PROC(name, argt, rest, relt, cache, respsize)   \
654  { (svc_procfunc) nfsd3_proc_##name,            \
655    (kxdrproc_t) nfs3svc_decode_##argt##args,    \
656    (kxdrproc_t) nfs3svc_encode_##rest##res,     \
657    (kxdrproc_t) nfs3svc_release_##relt,         \
658    sizeof(struct nfsd3_##argt##args),           \
659    sizeof(struct nfsd3_##rest##res),            \
660    0,                                           \
661    cache,                                       \
662    respsize,                                    \
663  }
664 
665 #define ST 1            /* status*/
666 #define FH 17           /* filehandle with length */
667 #define AT 21           /* attributes */
668 #define pAT (1+AT)      /* post attributes - conditional */
669 #define WC (7+pAT)      /* WCC attributes */
670 
671 static struct svc_procedure             nfsd_procedures3[22] = {
672   PROC(null,     void,          void,           void,     RC_NOCACHE, ST),
673   PROC(getattr,  fhandle,       attrstat,       fhandle,  RC_NOCACHE, ST+AT),
674   PROC(setattr,  sattr,         wccstat,        fhandle,  RC_REPLBUFF, ST+WC),
675   PROC(lookup,   dirop,         dirop,          fhandle2, RC_NOCACHE, ST+FH+pAT+pAT),
676   PROC(access,   access,        access,         fhandle,  RC_NOCACHE, ST+pAT+1),
677   PROC(readlink, readlink,      readlink,       fhandle,  RC_NOCACHE, ST+pAT+1+NFS3_MAXPATHLEN/4),
678   PROC(read,     read,          read,           fhandle,  RC_NOCACHE, ST+pAT+4+NFSSVC_MAXBLKSIZE),
679   PROC(write,    write,         write,          fhandle,  RC_REPLBUFF, ST+WC+4),
680   PROC(create,   create,        create,         fhandle2, RC_REPLBUFF, ST+(1+FH+pAT)+WC),
681   PROC(mkdir,    mkdir,         create,         fhandle2, RC_REPLBUFF, ST+(1+FH+pAT)+WC),
682   PROC(symlink,  symlink,       create,         fhandle2, RC_REPLBUFF, ST+(1+FH+pAT)+WC),
683   PROC(mknod,    mknod,         create,         fhandle2, RC_REPLBUFF, ST+(1+FH+pAT)+WC),
684   PROC(remove,   dirop,         wccstat,        fhandle,  RC_REPLBUFF, ST+WC),
685   PROC(rmdir,    dirop,         wccstat,        fhandle,  RC_REPLBUFF, ST+WC),
686   PROC(rename,   rename,        rename,         fhandle2, RC_REPLBUFF, ST+WC+WC),
687   PROC(link,     link,          link,           fhandle2, RC_REPLBUFF, ST+pAT+WC),
688   PROC(readdir,  readdir,       readdir,        fhandle,  RC_NOCACHE, 0),
689   PROC(readdirplus,readdirplus, readdir,        fhandle,  RC_NOCACHE, 0),
690   PROC(fsstat,   fhandle,       fsstat,         void,     RC_NOCACHE, ST+pAT+2*6+1),
691   PROC(fsinfo,   fhandle,       fsinfo,         void,     RC_NOCACHE, ST+pAT+12),
692   PROC(pathconf, fhandle,       pathconf,       void,     RC_NOCACHE, ST+pAT+6),
693   PROC(commit,   commit,        commit,         fhandle,  RC_NOCACHE, ST+WC+2),
694 };
695 
696 struct svc_version      nfsd_version3 = {
697                 .vs_vers        = 3,
698                 .vs_nproc       = 22,
699                 .vs_proc        = nfsd_procedures3,
700                 .vs_dispatch    = nfsd_dispatch,
701                 .vs_xdrsize     = NFS3_SVC_XDRSIZE,
702 };
703 
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