1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Process version 2 NFS requests.
4 *
5 * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
6 */
7
8 #include <linux/namei.h>
9
10 #include "cache.h"
11 #include "xdr.h"
12 #include "vfs.h"
13
14 #define NFSDDBG_FACILITY NFSDDBG_PROC
15
16 static __be32
nfsd_proc_null(struct svc_rqst * rqstp)17 nfsd_proc_null(struct svc_rqst *rqstp)
18 {
19 return rpc_success;
20 }
21
22 /*
23 * Get a file's attributes
24 * N.B. After this call resp->fh needs an fh_put
25 */
26 static __be32
nfsd_proc_getattr(struct svc_rqst * rqstp)27 nfsd_proc_getattr(struct svc_rqst *rqstp)
28 {
29 struct nfsd_fhandle *argp = rqstp->rq_argp;
30 struct nfsd_attrstat *resp = rqstp->rq_resp;
31
32 dprintk("nfsd: GETATTR %s\n", SVCFH_fmt(&argp->fh));
33
34 fh_copy(&resp->fh, &argp->fh);
35 resp->status = fh_verify(rqstp, &resp->fh, 0,
36 NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT);
37 if (resp->status != nfs_ok)
38 goto out;
39 resp->status = fh_getattr(&resp->fh, &resp->stat);
40 out:
41 return rpc_success;
42 }
43
44 /*
45 * Set a file's attributes
46 * N.B. After this call resp->fh needs an fh_put
47 */
48 static __be32
nfsd_proc_setattr(struct svc_rqst * rqstp)49 nfsd_proc_setattr(struct svc_rqst *rqstp)
50 {
51 struct nfsd_sattrargs *argp = rqstp->rq_argp;
52 struct nfsd_attrstat *resp = rqstp->rq_resp;
53 struct iattr *iap = &argp->attrs;
54 struct svc_fh *fhp;
55
56 dprintk("nfsd: SETATTR %s, valid=%x, size=%ld\n",
57 SVCFH_fmt(&argp->fh),
58 argp->attrs.ia_valid, (long) argp->attrs.ia_size);
59
60 fhp = fh_copy(&resp->fh, &argp->fh);
61
62 /*
63 * NFSv2 does not differentiate between "set-[ac]time-to-now"
64 * which only requires access, and "set-[ac]time-to-X" which
65 * requires ownership.
66 * So if it looks like it might be "set both to the same time which
67 * is close to now", and if setattr_prepare fails, then we
68 * convert to "set to now" instead of "set to explicit time"
69 *
70 * We only call setattr_prepare as the last test as technically
71 * it is not an interface that we should be using.
72 */
73 #define BOTH_TIME_SET (ATTR_ATIME_SET | ATTR_MTIME_SET)
74 #define MAX_TOUCH_TIME_ERROR (30*60)
75 if ((iap->ia_valid & BOTH_TIME_SET) == BOTH_TIME_SET &&
76 iap->ia_mtime.tv_sec == iap->ia_atime.tv_sec) {
77 /*
78 * Looks probable.
79 *
80 * Now just make sure time is in the right ballpark.
81 * Solaris, at least, doesn't seem to care what the time
82 * request is. We require it be within 30 minutes of now.
83 */
84 time64_t delta = iap->ia_atime.tv_sec - ktime_get_real_seconds();
85
86 resp->status = fh_verify(rqstp, fhp, 0, NFSD_MAY_NOP);
87 if (resp->status != nfs_ok)
88 goto out;
89
90 if (delta < 0)
91 delta = -delta;
92 if (delta < MAX_TOUCH_TIME_ERROR &&
93 setattr_prepare(&init_user_ns, fhp->fh_dentry, iap) != 0) {
94 /*
95 * Turn off ATTR_[AM]TIME_SET but leave ATTR_[AM]TIME.
96 * This will cause notify_change to set these times
97 * to "now"
98 */
99 iap->ia_valid &= ~BOTH_TIME_SET;
100 }
101 }
102
103 resp->status = nfsd_setattr(rqstp, fhp, iap, 0, (time64_t)0);
104 if (resp->status != nfs_ok)
105 goto out;
106
107 resp->status = fh_getattr(&resp->fh, &resp->stat);
108 out:
109 return rpc_success;
110 }
111
112 /* Obsolete, replaced by MNTPROC_MNT. */
113 static __be32
nfsd_proc_root(struct svc_rqst * rqstp)114 nfsd_proc_root(struct svc_rqst *rqstp)
115 {
116 return rpc_success;
117 }
118
119 /*
120 * Look up a path name component
121 * Note: the dentry in the resp->fh may be negative if the file
122 * doesn't exist yet.
123 * N.B. After this call resp->fh needs an fh_put
124 */
125 static __be32
nfsd_proc_lookup(struct svc_rqst * rqstp)126 nfsd_proc_lookup(struct svc_rqst *rqstp)
127 {
128 struct nfsd_diropargs *argp = rqstp->rq_argp;
129 struct nfsd_diropres *resp = rqstp->rq_resp;
130
131 dprintk("nfsd: LOOKUP %s %.*s\n",
132 SVCFH_fmt(&argp->fh), argp->len, argp->name);
133
134 fh_init(&resp->fh, NFS_FHSIZE);
135 resp->status = nfsd_lookup(rqstp, &argp->fh, argp->name, argp->len,
136 &resp->fh);
137 fh_put(&argp->fh);
138 if (resp->status != nfs_ok)
139 goto out;
140
141 resp->status = fh_getattr(&resp->fh, &resp->stat);
142 out:
143 return rpc_success;
144 }
145
146 /*
147 * Read a symlink.
148 */
149 static __be32
nfsd_proc_readlink(struct svc_rqst * rqstp)150 nfsd_proc_readlink(struct svc_rqst *rqstp)
151 {
152 struct nfsd_fhandle *argp = rqstp->rq_argp;
153 struct nfsd_readlinkres *resp = rqstp->rq_resp;
154
155 dprintk("nfsd: READLINK %s\n", SVCFH_fmt(&argp->fh));
156
157 /* Read the symlink. */
158 resp->len = NFS_MAXPATHLEN;
159 resp->page = *(rqstp->rq_next_page++);
160 resp->status = nfsd_readlink(rqstp, &argp->fh,
161 page_address(resp->page), &resp->len);
162
163 fh_put(&argp->fh);
164 return rpc_success;
165 }
166
167 /*
168 * Read a portion of a file.
169 * N.B. After this call resp->fh needs an fh_put
170 */
171 static __be32
nfsd_proc_read(struct svc_rqst * rqstp)172 nfsd_proc_read(struct svc_rqst *rqstp)
173 {
174 struct nfsd_readargs *argp = rqstp->rq_argp;
175 struct nfsd_readres *resp = rqstp->rq_resp;
176 unsigned int len;
177 u32 eof;
178 int v;
179
180 dprintk("nfsd: READ %s %d bytes at %d\n",
181 SVCFH_fmt(&argp->fh),
182 argp->count, argp->offset);
183
184 argp->count = min_t(u32, argp->count, NFSSVC_MAXBLKSIZE_V2);
185
186 v = 0;
187 len = argp->count;
188 resp->pages = rqstp->rq_next_page;
189 while (len > 0) {
190 struct page *page = *(rqstp->rq_next_page++);
191
192 rqstp->rq_vec[v].iov_base = page_address(page);
193 rqstp->rq_vec[v].iov_len = min_t(unsigned int, len, PAGE_SIZE);
194 len -= rqstp->rq_vec[v].iov_len;
195 v++;
196 }
197
198 /* Obtain buffer pointer for payload. 19 is 1 word for
199 * status, 17 words for fattr, and 1 word for the byte count.
200 */
201 svc_reserve_auth(rqstp, (19<<2) + argp->count + 4);
202
203 resp->count = argp->count;
204 fh_copy(&resp->fh, &argp->fh);
205 resp->status = nfsd_read(rqstp, &resp->fh, argp->offset,
206 rqstp->rq_vec, v, &resp->count, &eof);
207 if (resp->status == nfs_ok)
208 resp->status = fh_getattr(&resp->fh, &resp->stat);
209 else if (resp->status == nfserr_jukebox)
210 return rpc_drop_reply;
211 return rpc_success;
212 }
213
214 /* Reserved */
215 static __be32
nfsd_proc_writecache(struct svc_rqst * rqstp)216 nfsd_proc_writecache(struct svc_rqst *rqstp)
217 {
218 return rpc_success;
219 }
220
221 /*
222 * Write data to a file
223 * N.B. After this call resp->fh needs an fh_put
224 */
225 static __be32
nfsd_proc_write(struct svc_rqst * rqstp)226 nfsd_proc_write(struct svc_rqst *rqstp)
227 {
228 struct nfsd_writeargs *argp = rqstp->rq_argp;
229 struct nfsd_attrstat *resp = rqstp->rq_resp;
230 unsigned long cnt = argp->len;
231 unsigned int nvecs;
232
233 dprintk("nfsd: WRITE %s %d bytes at %d\n",
234 SVCFH_fmt(&argp->fh),
235 argp->len, argp->offset);
236
237 nvecs = svc_fill_write_vector(rqstp, &argp->payload);
238 if (!nvecs) {
239 resp->status = nfserr_io;
240 goto out;
241 }
242
243 resp->status = nfsd_write(rqstp, fh_copy(&resp->fh, &argp->fh),
244 argp->offset, rqstp->rq_vec, nvecs,
245 &cnt, NFS_DATA_SYNC, NULL);
246 if (resp->status == nfs_ok)
247 resp->status = fh_getattr(&resp->fh, &resp->stat);
248 else if (resp->status == nfserr_jukebox)
249 return rpc_drop_reply;
250 out:
251 return rpc_success;
252 }
253
254 /*
255 * CREATE processing is complicated. The keyword here is `overloaded.'
256 * The parent directory is kept locked between the check for existence
257 * and the actual create() call in compliance with VFS protocols.
258 * N.B. After this call _both_ argp->fh and resp->fh need an fh_put
259 */
260 static __be32
nfsd_proc_create(struct svc_rqst * rqstp)261 nfsd_proc_create(struct svc_rqst *rqstp)
262 {
263 struct nfsd_createargs *argp = rqstp->rq_argp;
264 struct nfsd_diropres *resp = rqstp->rq_resp;
265 svc_fh *dirfhp = &argp->fh;
266 svc_fh *newfhp = &resp->fh;
267 struct iattr *attr = &argp->attrs;
268 struct inode *inode;
269 struct dentry *dchild;
270 int type, mode;
271 int hosterr;
272 dev_t rdev = 0, wanted = new_decode_dev(attr->ia_size);
273
274 dprintk("nfsd: CREATE %s %.*s\n",
275 SVCFH_fmt(dirfhp), argp->len, argp->name);
276
277 /* First verify the parent file handle */
278 resp->status = fh_verify(rqstp, dirfhp, S_IFDIR, NFSD_MAY_EXEC);
279 if (resp->status != nfs_ok)
280 goto done; /* must fh_put dirfhp even on error */
281
282 /* Check for NFSD_MAY_WRITE in nfsd_create if necessary */
283
284 resp->status = nfserr_exist;
285 if (isdotent(argp->name, argp->len))
286 goto done;
287 hosterr = fh_want_write(dirfhp);
288 if (hosterr) {
289 resp->status = nfserrno(hosterr);
290 goto done;
291 }
292
293 fh_lock_nested(dirfhp, I_MUTEX_PARENT);
294 dchild = lookup_one_len(argp->name, dirfhp->fh_dentry, argp->len);
295 if (IS_ERR(dchild)) {
296 resp->status = nfserrno(PTR_ERR(dchild));
297 goto out_unlock;
298 }
299 fh_init(newfhp, NFS_FHSIZE);
300 resp->status = fh_compose(newfhp, dirfhp->fh_export, dchild, dirfhp);
301 if (!resp->status && d_really_is_negative(dchild))
302 resp->status = nfserr_noent;
303 dput(dchild);
304 if (resp->status) {
305 if (resp->status != nfserr_noent)
306 goto out_unlock;
307 /*
308 * If the new file handle wasn't verified, we can't tell
309 * whether the file exists or not. Time to bail ...
310 */
311 resp->status = nfserr_acces;
312 if (!newfhp->fh_dentry) {
313 printk(KERN_WARNING
314 "nfsd_proc_create: file handle not verified\n");
315 goto out_unlock;
316 }
317 }
318
319 inode = d_inode(newfhp->fh_dentry);
320
321 /* Unfudge the mode bits */
322 if (attr->ia_valid & ATTR_MODE) {
323 type = attr->ia_mode & S_IFMT;
324 mode = attr->ia_mode & ~S_IFMT;
325 if (!type) {
326 /* no type, so if target exists, assume same as that,
327 * else assume a file */
328 if (inode) {
329 type = inode->i_mode & S_IFMT;
330 switch(type) {
331 case S_IFCHR:
332 case S_IFBLK:
333 /* reserve rdev for later checking */
334 rdev = inode->i_rdev;
335 attr->ia_valid |= ATTR_SIZE;
336
337 fallthrough;
338 case S_IFIFO:
339 /* this is probably a permission check..
340 * at least IRIX implements perm checking on
341 * echo thing > device-special-file-or-pipe
342 * by doing a CREATE with type==0
343 */
344 resp->status = nfsd_permission(rqstp,
345 newfhp->fh_export,
346 newfhp->fh_dentry,
347 NFSD_MAY_WRITE|NFSD_MAY_LOCAL_ACCESS);
348 if (resp->status && resp->status != nfserr_rofs)
349 goto out_unlock;
350 }
351 } else
352 type = S_IFREG;
353 }
354 } else if (inode) {
355 type = inode->i_mode & S_IFMT;
356 mode = inode->i_mode & ~S_IFMT;
357 } else {
358 type = S_IFREG;
359 mode = 0; /* ??? */
360 }
361
362 attr->ia_valid |= ATTR_MODE;
363 attr->ia_mode = mode;
364
365 /* Special treatment for non-regular files according to the
366 * gospel of sun micro
367 */
368 if (type != S_IFREG) {
369 if (type != S_IFBLK && type != S_IFCHR) {
370 rdev = 0;
371 } else if (type == S_IFCHR && !(attr->ia_valid & ATTR_SIZE)) {
372 /* If you think you've seen the worst, grok this. */
373 type = S_IFIFO;
374 } else {
375 /* Okay, char or block special */
376 if (!rdev)
377 rdev = wanted;
378 }
379
380 /* we've used the SIZE information, so discard it */
381 attr->ia_valid &= ~ATTR_SIZE;
382
383 /* Make sure the type and device matches */
384 resp->status = nfserr_exist;
385 if (inode && inode_wrong_type(inode, type))
386 goto out_unlock;
387 }
388
389 resp->status = nfs_ok;
390 if (!inode) {
391 /* File doesn't exist. Create it and set attrs */
392 resp->status = nfsd_create_locked(rqstp, dirfhp, argp->name,
393 argp->len, attr, type, rdev,
394 newfhp);
395 } else if (type == S_IFREG) {
396 dprintk("nfsd: existing %s, valid=%x, size=%ld\n",
397 argp->name, attr->ia_valid, (long) attr->ia_size);
398 /* File already exists. We ignore all attributes except
399 * size, so that creat() behaves exactly like
400 * open(..., O_CREAT|O_TRUNC|O_WRONLY).
401 */
402 attr->ia_valid &= ATTR_SIZE;
403 if (attr->ia_valid)
404 resp->status = nfsd_setattr(rqstp, newfhp, attr, 0,
405 (time64_t)0);
406 }
407
408 out_unlock:
409 /* We don't really need to unlock, as fh_put does it. */
410 fh_unlock(dirfhp);
411 fh_drop_write(dirfhp);
412 done:
413 fh_put(dirfhp);
414 if (resp->status != nfs_ok)
415 goto out;
416 resp->status = fh_getattr(&resp->fh, &resp->stat);
417 out:
418 return rpc_success;
419 }
420
421 static __be32
nfsd_proc_remove(struct svc_rqst * rqstp)422 nfsd_proc_remove(struct svc_rqst *rqstp)
423 {
424 struct nfsd_diropargs *argp = rqstp->rq_argp;
425 struct nfsd_stat *resp = rqstp->rq_resp;
426
427 dprintk("nfsd: REMOVE %s %.*s\n", SVCFH_fmt(&argp->fh),
428 argp->len, argp->name);
429
430 /* Unlink. -SIFDIR means file must not be a directory */
431 resp->status = nfsd_unlink(rqstp, &argp->fh, -S_IFDIR,
432 argp->name, argp->len);
433 fh_put(&argp->fh);
434 return rpc_success;
435 }
436
437 static __be32
nfsd_proc_rename(struct svc_rqst * rqstp)438 nfsd_proc_rename(struct svc_rqst *rqstp)
439 {
440 struct nfsd_renameargs *argp = rqstp->rq_argp;
441 struct nfsd_stat *resp = rqstp->rq_resp;
442
443 dprintk("nfsd: RENAME %s %.*s -> \n",
444 SVCFH_fmt(&argp->ffh), argp->flen, argp->fname);
445 dprintk("nfsd: -> %s %.*s\n",
446 SVCFH_fmt(&argp->tfh), argp->tlen, argp->tname);
447
448 resp->status = nfsd_rename(rqstp, &argp->ffh, argp->fname, argp->flen,
449 &argp->tfh, argp->tname, argp->tlen);
450 fh_put(&argp->ffh);
451 fh_put(&argp->tfh);
452 return rpc_success;
453 }
454
455 static __be32
nfsd_proc_link(struct svc_rqst * rqstp)456 nfsd_proc_link(struct svc_rqst *rqstp)
457 {
458 struct nfsd_linkargs *argp = rqstp->rq_argp;
459 struct nfsd_stat *resp = rqstp->rq_resp;
460
461 dprintk("nfsd: LINK %s ->\n",
462 SVCFH_fmt(&argp->ffh));
463 dprintk("nfsd: %s %.*s\n",
464 SVCFH_fmt(&argp->tfh),
465 argp->tlen,
466 argp->tname);
467
468 resp->status = nfsd_link(rqstp, &argp->tfh, argp->tname, argp->tlen,
469 &argp->ffh);
470 fh_put(&argp->ffh);
471 fh_put(&argp->tfh);
472 return rpc_success;
473 }
474
475 static __be32
nfsd_proc_symlink(struct svc_rqst * rqstp)476 nfsd_proc_symlink(struct svc_rqst *rqstp)
477 {
478 struct nfsd_symlinkargs *argp = rqstp->rq_argp;
479 struct nfsd_stat *resp = rqstp->rq_resp;
480 struct svc_fh newfh;
481
482 if (argp->tlen > NFS_MAXPATHLEN) {
483 resp->status = nfserr_nametoolong;
484 goto out;
485 }
486
487 argp->tname = svc_fill_symlink_pathname(rqstp, &argp->first,
488 page_address(rqstp->rq_arg.pages[0]),
489 argp->tlen);
490 if (IS_ERR(argp->tname)) {
491 resp->status = nfserrno(PTR_ERR(argp->tname));
492 goto out;
493 }
494
495 dprintk("nfsd: SYMLINK %s %.*s -> %.*s\n",
496 SVCFH_fmt(&argp->ffh), argp->flen, argp->fname,
497 argp->tlen, argp->tname);
498
499 fh_init(&newfh, NFS_FHSIZE);
500 resp->status = nfsd_symlink(rqstp, &argp->ffh, argp->fname, argp->flen,
501 argp->tname, &newfh);
502
503 kfree(argp->tname);
504 fh_put(&argp->ffh);
505 fh_put(&newfh);
506 out:
507 return rpc_success;
508 }
509
510 /*
511 * Make directory. This operation is not idempotent.
512 * N.B. After this call resp->fh needs an fh_put
513 */
514 static __be32
nfsd_proc_mkdir(struct svc_rqst * rqstp)515 nfsd_proc_mkdir(struct svc_rqst *rqstp)
516 {
517 struct nfsd_createargs *argp = rqstp->rq_argp;
518 struct nfsd_diropres *resp = rqstp->rq_resp;
519
520 dprintk("nfsd: MKDIR %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name);
521
522 if (resp->fh.fh_dentry) {
523 printk(KERN_WARNING
524 "nfsd_proc_mkdir: response already verified??\n");
525 }
526
527 argp->attrs.ia_valid &= ~ATTR_SIZE;
528 fh_init(&resp->fh, NFS_FHSIZE);
529 resp->status = nfsd_create(rqstp, &argp->fh, argp->name, argp->len,
530 &argp->attrs, S_IFDIR, 0, &resp->fh);
531 fh_put(&argp->fh);
532 if (resp->status != nfs_ok)
533 goto out;
534
535 resp->status = fh_getattr(&resp->fh, &resp->stat);
536 out:
537 return rpc_success;
538 }
539
540 /*
541 * Remove a directory
542 */
543 static __be32
nfsd_proc_rmdir(struct svc_rqst * rqstp)544 nfsd_proc_rmdir(struct svc_rqst *rqstp)
545 {
546 struct nfsd_diropargs *argp = rqstp->rq_argp;
547 struct nfsd_stat *resp = rqstp->rq_resp;
548
549 dprintk("nfsd: RMDIR %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name);
550
551 resp->status = nfsd_unlink(rqstp, &argp->fh, S_IFDIR,
552 argp->name, argp->len);
553 fh_put(&argp->fh);
554 return rpc_success;
555 }
556
nfsd_init_dirlist_pages(struct svc_rqst * rqstp,struct nfsd_readdirres * resp,u32 count)557 static void nfsd_init_dirlist_pages(struct svc_rqst *rqstp,
558 struct nfsd_readdirres *resp,
559 u32 count)
560 {
561 struct xdr_buf *buf = &resp->dirlist;
562 struct xdr_stream *xdr = &resp->xdr;
563
564 count = clamp(count, (u32)(XDR_UNIT * 2), svc_max_payload(rqstp));
565
566 memset(buf, 0, sizeof(*buf));
567
568 /* Reserve room for the NULL ptr & eof flag (-2 words) */
569 buf->buflen = count - XDR_UNIT * 2;
570 buf->pages = rqstp->rq_next_page;
571 rqstp->rq_next_page++;
572
573 /* This is xdr_init_encode(), but it assumes that
574 * the head kvec has already been consumed. */
575 xdr_set_scratch_buffer(xdr, NULL, 0);
576 xdr->buf = buf;
577 xdr->page_ptr = buf->pages;
578 xdr->iov = NULL;
579 xdr->p = page_address(*buf->pages);
580 xdr->end = (void *)xdr->p + min_t(u32, buf->buflen, PAGE_SIZE);
581 xdr->rqst = NULL;
582 }
583
584 /*
585 * Read a portion of a directory.
586 */
587 static __be32
nfsd_proc_readdir(struct svc_rqst * rqstp)588 nfsd_proc_readdir(struct svc_rqst *rqstp)
589 {
590 struct nfsd_readdirargs *argp = rqstp->rq_argp;
591 struct nfsd_readdirres *resp = rqstp->rq_resp;
592 loff_t offset;
593
594 dprintk("nfsd: READDIR %s %d bytes at %d\n",
595 SVCFH_fmt(&argp->fh),
596 argp->count, argp->cookie);
597
598 nfsd_init_dirlist_pages(rqstp, resp, argp->count);
599
600 resp->common.err = nfs_ok;
601 resp->cookie_offset = 0;
602 offset = argp->cookie;
603 resp->status = nfsd_readdir(rqstp, &argp->fh, &offset,
604 &resp->common, nfssvc_encode_entry);
605 nfssvc_encode_nfscookie(resp, offset);
606
607 fh_put(&argp->fh);
608 return rpc_success;
609 }
610
611 /*
612 * Get file system info
613 */
614 static __be32
nfsd_proc_statfs(struct svc_rqst * rqstp)615 nfsd_proc_statfs(struct svc_rqst *rqstp)
616 {
617 struct nfsd_fhandle *argp = rqstp->rq_argp;
618 struct nfsd_statfsres *resp = rqstp->rq_resp;
619
620 dprintk("nfsd: STATFS %s\n", SVCFH_fmt(&argp->fh));
621
622 resp->status = nfsd_statfs(rqstp, &argp->fh, &resp->stats,
623 NFSD_MAY_BYPASS_GSS_ON_ROOT);
624 fh_put(&argp->fh);
625 return rpc_success;
626 }
627
628 /*
629 * NFSv2 Server procedures.
630 * Only the results of non-idempotent operations are cached.
631 */
632
633 #define ST 1 /* status */
634 #define FH 8 /* filehandle */
635 #define AT 18 /* attributes */
636
637 static const struct svc_procedure nfsd_procedures2[18] = {
638 [NFSPROC_NULL] = {
639 .pc_func = nfsd_proc_null,
640 .pc_decode = nfssvc_decode_voidarg,
641 .pc_encode = nfssvc_encode_voidres,
642 .pc_argsize = sizeof(struct nfsd_voidargs),
643 .pc_ressize = sizeof(struct nfsd_voidres),
644 .pc_cachetype = RC_NOCACHE,
645 .pc_xdrressize = 0,
646 .pc_name = "NULL",
647 },
648 [NFSPROC_GETATTR] = {
649 .pc_func = nfsd_proc_getattr,
650 .pc_decode = nfssvc_decode_fhandleargs,
651 .pc_encode = nfssvc_encode_attrstatres,
652 .pc_release = nfssvc_release_attrstat,
653 .pc_argsize = sizeof(struct nfsd_fhandle),
654 .pc_ressize = sizeof(struct nfsd_attrstat),
655 .pc_cachetype = RC_NOCACHE,
656 .pc_xdrressize = ST+AT,
657 .pc_name = "GETATTR",
658 },
659 [NFSPROC_SETATTR] = {
660 .pc_func = nfsd_proc_setattr,
661 .pc_decode = nfssvc_decode_sattrargs,
662 .pc_encode = nfssvc_encode_attrstatres,
663 .pc_release = nfssvc_release_attrstat,
664 .pc_argsize = sizeof(struct nfsd_sattrargs),
665 .pc_ressize = sizeof(struct nfsd_attrstat),
666 .pc_cachetype = RC_REPLBUFF,
667 .pc_xdrressize = ST+AT,
668 .pc_name = "SETATTR",
669 },
670 [NFSPROC_ROOT] = {
671 .pc_func = nfsd_proc_root,
672 .pc_decode = nfssvc_decode_voidarg,
673 .pc_encode = nfssvc_encode_voidres,
674 .pc_argsize = sizeof(struct nfsd_voidargs),
675 .pc_ressize = sizeof(struct nfsd_voidres),
676 .pc_cachetype = RC_NOCACHE,
677 .pc_xdrressize = 0,
678 .pc_name = "ROOT",
679 },
680 [NFSPROC_LOOKUP] = {
681 .pc_func = nfsd_proc_lookup,
682 .pc_decode = nfssvc_decode_diropargs,
683 .pc_encode = nfssvc_encode_diropres,
684 .pc_release = nfssvc_release_diropres,
685 .pc_argsize = sizeof(struct nfsd_diropargs),
686 .pc_ressize = sizeof(struct nfsd_diropres),
687 .pc_cachetype = RC_NOCACHE,
688 .pc_xdrressize = ST+FH+AT,
689 .pc_name = "LOOKUP",
690 },
691 [NFSPROC_READLINK] = {
692 .pc_func = nfsd_proc_readlink,
693 .pc_decode = nfssvc_decode_fhandleargs,
694 .pc_encode = nfssvc_encode_readlinkres,
695 .pc_argsize = sizeof(struct nfsd_fhandle),
696 .pc_ressize = sizeof(struct nfsd_readlinkres),
697 .pc_cachetype = RC_NOCACHE,
698 .pc_xdrressize = ST+1+NFS_MAXPATHLEN/4,
699 .pc_name = "READLINK",
700 },
701 [NFSPROC_READ] = {
702 .pc_func = nfsd_proc_read,
703 .pc_decode = nfssvc_decode_readargs,
704 .pc_encode = nfssvc_encode_readres,
705 .pc_release = nfssvc_release_readres,
706 .pc_argsize = sizeof(struct nfsd_readargs),
707 .pc_ressize = sizeof(struct nfsd_readres),
708 .pc_cachetype = RC_NOCACHE,
709 .pc_xdrressize = ST+AT+1+NFSSVC_MAXBLKSIZE_V2/4,
710 .pc_name = "READ",
711 },
712 [NFSPROC_WRITECACHE] = {
713 .pc_func = nfsd_proc_writecache,
714 .pc_decode = nfssvc_decode_voidarg,
715 .pc_encode = nfssvc_encode_voidres,
716 .pc_argsize = sizeof(struct nfsd_voidargs),
717 .pc_ressize = sizeof(struct nfsd_voidres),
718 .pc_cachetype = RC_NOCACHE,
719 .pc_xdrressize = 0,
720 .pc_name = "WRITECACHE",
721 },
722 [NFSPROC_WRITE] = {
723 .pc_func = nfsd_proc_write,
724 .pc_decode = nfssvc_decode_writeargs,
725 .pc_encode = nfssvc_encode_attrstatres,
726 .pc_release = nfssvc_release_attrstat,
727 .pc_argsize = sizeof(struct nfsd_writeargs),
728 .pc_ressize = sizeof(struct nfsd_attrstat),
729 .pc_cachetype = RC_REPLBUFF,
730 .pc_xdrressize = ST+AT,
731 .pc_name = "WRITE",
732 },
733 [NFSPROC_CREATE] = {
734 .pc_func = nfsd_proc_create,
735 .pc_decode = nfssvc_decode_createargs,
736 .pc_encode = nfssvc_encode_diropres,
737 .pc_release = nfssvc_release_diropres,
738 .pc_argsize = sizeof(struct nfsd_createargs),
739 .pc_ressize = sizeof(struct nfsd_diropres),
740 .pc_cachetype = RC_REPLBUFF,
741 .pc_xdrressize = ST+FH+AT,
742 .pc_name = "CREATE",
743 },
744 [NFSPROC_REMOVE] = {
745 .pc_func = nfsd_proc_remove,
746 .pc_decode = nfssvc_decode_diropargs,
747 .pc_encode = nfssvc_encode_statres,
748 .pc_argsize = sizeof(struct nfsd_diropargs),
749 .pc_ressize = sizeof(struct nfsd_stat),
750 .pc_cachetype = RC_REPLSTAT,
751 .pc_xdrressize = ST,
752 .pc_name = "REMOVE",
753 },
754 [NFSPROC_RENAME] = {
755 .pc_func = nfsd_proc_rename,
756 .pc_decode = nfssvc_decode_renameargs,
757 .pc_encode = nfssvc_encode_statres,
758 .pc_argsize = sizeof(struct nfsd_renameargs),
759 .pc_ressize = sizeof(struct nfsd_stat),
760 .pc_cachetype = RC_REPLSTAT,
761 .pc_xdrressize = ST,
762 .pc_name = "RENAME",
763 },
764 [NFSPROC_LINK] = {
765 .pc_func = nfsd_proc_link,
766 .pc_decode = nfssvc_decode_linkargs,
767 .pc_encode = nfssvc_encode_statres,
768 .pc_argsize = sizeof(struct nfsd_linkargs),
769 .pc_ressize = sizeof(struct nfsd_stat),
770 .pc_cachetype = RC_REPLSTAT,
771 .pc_xdrressize = ST,
772 .pc_name = "LINK",
773 },
774 [NFSPROC_SYMLINK] = {
775 .pc_func = nfsd_proc_symlink,
776 .pc_decode = nfssvc_decode_symlinkargs,
777 .pc_encode = nfssvc_encode_statres,
778 .pc_argsize = sizeof(struct nfsd_symlinkargs),
779 .pc_ressize = sizeof(struct nfsd_stat),
780 .pc_cachetype = RC_REPLSTAT,
781 .pc_xdrressize = ST,
782 .pc_name = "SYMLINK",
783 },
784 [NFSPROC_MKDIR] = {
785 .pc_func = nfsd_proc_mkdir,
786 .pc_decode = nfssvc_decode_createargs,
787 .pc_encode = nfssvc_encode_diropres,
788 .pc_release = nfssvc_release_diropres,
789 .pc_argsize = sizeof(struct nfsd_createargs),
790 .pc_ressize = sizeof(struct nfsd_diropres),
791 .pc_cachetype = RC_REPLBUFF,
792 .pc_xdrressize = ST+FH+AT,
793 .pc_name = "MKDIR",
794 },
795 [NFSPROC_RMDIR] = {
796 .pc_func = nfsd_proc_rmdir,
797 .pc_decode = nfssvc_decode_diropargs,
798 .pc_encode = nfssvc_encode_statres,
799 .pc_argsize = sizeof(struct nfsd_diropargs),
800 .pc_ressize = sizeof(struct nfsd_stat),
801 .pc_cachetype = RC_REPLSTAT,
802 .pc_xdrressize = ST,
803 .pc_name = "RMDIR",
804 },
805 [NFSPROC_READDIR] = {
806 .pc_func = nfsd_proc_readdir,
807 .pc_decode = nfssvc_decode_readdirargs,
808 .pc_encode = nfssvc_encode_readdirres,
809 .pc_argsize = sizeof(struct nfsd_readdirargs),
810 .pc_ressize = sizeof(struct nfsd_readdirres),
811 .pc_cachetype = RC_NOCACHE,
812 .pc_name = "READDIR",
813 },
814 [NFSPROC_STATFS] = {
815 .pc_func = nfsd_proc_statfs,
816 .pc_decode = nfssvc_decode_fhandleargs,
817 .pc_encode = nfssvc_encode_statfsres,
818 .pc_argsize = sizeof(struct nfsd_fhandle),
819 .pc_ressize = sizeof(struct nfsd_statfsres),
820 .pc_cachetype = RC_NOCACHE,
821 .pc_xdrressize = ST+5,
822 .pc_name = "STATFS",
823 },
824 };
825
826
827 static unsigned int nfsd_count2[ARRAY_SIZE(nfsd_procedures2)];
828 const struct svc_version nfsd_version2 = {
829 .vs_vers = 2,
830 .vs_nproc = 18,
831 .vs_proc = nfsd_procedures2,
832 .vs_count = nfsd_count2,
833 .vs_dispatch = nfsd_dispatch,
834 .vs_xdrsize = NFS2_SVC_XDRSIZE,
835 };
836
837 /*
838 * Map errnos to NFS errnos.
839 */
840 __be32
nfserrno(int errno)841 nfserrno (int errno)
842 {
843 static struct {
844 __be32 nfserr;
845 int syserr;
846 } nfs_errtbl[] = {
847 { nfs_ok, 0 },
848 { nfserr_perm, -EPERM },
849 { nfserr_noent, -ENOENT },
850 { nfserr_io, -EIO },
851 { nfserr_nxio, -ENXIO },
852 { nfserr_fbig, -E2BIG },
853 { nfserr_acces, -EACCES },
854 { nfserr_exist, -EEXIST },
855 { nfserr_xdev, -EXDEV },
856 { nfserr_mlink, -EMLINK },
857 { nfserr_nodev, -ENODEV },
858 { nfserr_notdir, -ENOTDIR },
859 { nfserr_isdir, -EISDIR },
860 { nfserr_inval, -EINVAL },
861 { nfserr_fbig, -EFBIG },
862 { nfserr_nospc, -ENOSPC },
863 { nfserr_rofs, -EROFS },
864 { nfserr_mlink, -EMLINK },
865 { nfserr_nametoolong, -ENAMETOOLONG },
866 { nfserr_notempty, -ENOTEMPTY },
867 #ifdef EDQUOT
868 { nfserr_dquot, -EDQUOT },
869 #endif
870 { nfserr_stale, -ESTALE },
871 { nfserr_jukebox, -ETIMEDOUT },
872 { nfserr_jukebox, -ERESTARTSYS },
873 { nfserr_jukebox, -EAGAIN },
874 { nfserr_jukebox, -EWOULDBLOCK },
875 { nfserr_jukebox, -ENOMEM },
876 { nfserr_io, -ETXTBSY },
877 { nfserr_notsupp, -EOPNOTSUPP },
878 { nfserr_toosmall, -ETOOSMALL },
879 { nfserr_serverfault, -ESERVERFAULT },
880 { nfserr_serverfault, -ENFILE },
881 { nfserr_io, -EUCLEAN },
882 { nfserr_perm, -ENOKEY },
883 { nfserr_no_grace, -ENOGRACE},
884 };
885 int i;
886
887 for (i = 0; i < ARRAY_SIZE(nfs_errtbl); i++) {
888 if (nfs_errtbl[i].syserr == errno)
889 return nfs_errtbl[i].nfserr;
890 }
891 WARN_ONCE(1, "nfsd: non-standard errno: %d\n", errno);
892 return nfserr_io;
893 }
894
895