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Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * nfsproc2.c Process version 2 NFS requests. | |
3 | * linux/fs/nfsd/nfs2proc.c | |
4 | * | |
5 | * Process version 2 NFS requests. | |
6 | * | |
7 | * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de> | |
8 | */ | |
9 | ||
1da177e4 | 10 | #include <linux/namei.h> |
1da177e4 | 11 | |
9a74af21 BH |
12 | #include "cache.h" |
13 | #include "xdr.h" | |
0a3adade | 14 | #include "vfs.h" |
1da177e4 LT |
15 | |
16 | typedef struct svc_rqst svc_rqst; | |
17 | typedef struct svc_buf svc_buf; | |
18 | ||
19 | #define NFSDDBG_FACILITY NFSDDBG_PROC | |
20 | ||
21 | ||
7111c66e | 22 | static __be32 |
1da177e4 LT |
23 | nfsd_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) |
24 | { | |
25 | return nfs_ok; | |
26 | } | |
27 | ||
c4d987ba AV |
28 | static __be32 |
29 | nfsd_return_attrs(__be32 err, struct nfsd_attrstat *resp) | |
846f2fcd DS |
30 | { |
31 | if (err) return err; | |
54775491 | 32 | return nfserrno(vfs_getattr(resp->fh.fh_export->ex_path.mnt, |
846f2fcd DS |
33 | resp->fh.fh_dentry, |
34 | &resp->stat)); | |
35 | } | |
c4d987ba AV |
36 | static __be32 |
37 | nfsd_return_dirop(__be32 err, struct nfsd_diropres *resp) | |
846f2fcd DS |
38 | { |
39 | if (err) return err; | |
54775491 | 40 | return nfserrno(vfs_getattr(resp->fh.fh_export->ex_path.mnt, |
846f2fcd DS |
41 | resp->fh.fh_dentry, |
42 | &resp->stat)); | |
43 | } | |
1da177e4 LT |
44 | /* |
45 | * Get a file's attributes | |
46 | * N.B. After this call resp->fh needs an fh_put | |
47 | */ | |
7111c66e | 48 | static __be32 |
1da177e4 LT |
49 | nfsd_proc_getattr(struct svc_rqst *rqstp, struct nfsd_fhandle *argp, |
50 | struct nfsd_attrstat *resp) | |
51 | { | |
c4d987ba | 52 | __be32 nfserr; |
1da177e4 LT |
53 | dprintk("nfsd: GETATTR %s\n", SVCFH_fmt(&argp->fh)); |
54 | ||
55 | fh_copy(&resp->fh, &argp->fh); | |
04716e66 BF |
56 | nfserr = fh_verify(rqstp, &resp->fh, 0, |
57 | NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT); | |
846f2fcd | 58 | return nfsd_return_attrs(nfserr, resp); |
1da177e4 LT |
59 | } |
60 | ||
61 | /* | |
62 | * Set a file's attributes | |
63 | * N.B. After this call resp->fh needs an fh_put | |
64 | */ | |
7111c66e | 65 | static __be32 |
1da177e4 LT |
66 | nfsd_proc_setattr(struct svc_rqst *rqstp, struct nfsd_sattrargs *argp, |
67 | struct nfsd_attrstat *resp) | |
68 | { | |
c4d987ba | 69 | __be32 nfserr; |
1da177e4 LT |
70 | dprintk("nfsd: SETATTR %s, valid=%x, size=%ld\n", |
71 | SVCFH_fmt(&argp->fh), | |
72 | argp->attrs.ia_valid, (long) argp->attrs.ia_size); | |
73 | ||
74 | fh_copy(&resp->fh, &argp->fh); | |
846f2fcd DS |
75 | nfserr = nfsd_setattr(rqstp, &resp->fh, &argp->attrs,0, (time_t)0); |
76 | return nfsd_return_attrs(nfserr, resp); | |
1da177e4 LT |
77 | } |
78 | ||
79 | /* | |
80 | * Look up a path name component | |
81 | * Note: the dentry in the resp->fh may be negative if the file | |
82 | * doesn't exist yet. | |
83 | * N.B. After this call resp->fh needs an fh_put | |
84 | */ | |
7111c66e | 85 | static __be32 |
1da177e4 LT |
86 | nfsd_proc_lookup(struct svc_rqst *rqstp, struct nfsd_diropargs *argp, |
87 | struct nfsd_diropres *resp) | |
88 | { | |
c4d987ba | 89 | __be32 nfserr; |
1da177e4 LT |
90 | |
91 | dprintk("nfsd: LOOKUP %s %.*s\n", | |
92 | SVCFH_fmt(&argp->fh), argp->len, argp->name); | |
93 | ||
94 | fh_init(&resp->fh, NFS_FHSIZE); | |
95 | nfserr = nfsd_lookup(rqstp, &argp->fh, argp->name, argp->len, | |
96 | &resp->fh); | |
97 | ||
98 | fh_put(&argp->fh); | |
846f2fcd | 99 | return nfsd_return_dirop(nfserr, resp); |
1da177e4 LT |
100 | } |
101 | ||
102 | /* | |
103 | * Read a symlink. | |
104 | */ | |
7111c66e | 105 | static __be32 |
1da177e4 LT |
106 | nfsd_proc_readlink(struct svc_rqst *rqstp, struct nfsd_readlinkargs *argp, |
107 | struct nfsd_readlinkres *resp) | |
108 | { | |
c4d987ba | 109 | __be32 nfserr; |
1da177e4 LT |
110 | |
111 | dprintk("nfsd: READLINK %s\n", SVCFH_fmt(&argp->fh)); | |
112 | ||
113 | /* Read the symlink. */ | |
114 | resp->len = NFS_MAXPATHLEN; | |
115 | nfserr = nfsd_readlink(rqstp, &argp->fh, argp->buffer, &resp->len); | |
116 | ||
117 | fh_put(&argp->fh); | |
118 | return nfserr; | |
119 | } | |
120 | ||
121 | /* | |
122 | * Read a portion of a file. | |
123 | * N.B. After this call resp->fh needs an fh_put | |
124 | */ | |
7111c66e | 125 | static __be32 |
1da177e4 LT |
126 | nfsd_proc_read(struct svc_rqst *rqstp, struct nfsd_readargs *argp, |
127 | struct nfsd_readres *resp) | |
128 | { | |
c4d987ba | 129 | __be32 nfserr; |
1da177e4 LT |
130 | |
131 | dprintk("nfsd: READ %s %d bytes at %d\n", | |
132 | SVCFH_fmt(&argp->fh), | |
133 | argp->count, argp->offset); | |
134 | ||
135 | /* Obtain buffer pointer for payload. 19 is 1 word for | |
136 | * status, 17 words for fattr, and 1 word for the byte count. | |
137 | */ | |
138 | ||
7adae489 | 139 | if (NFSSVC_MAXBLKSIZE_V2 < argp->count) { |
ad06e4bd | 140 | char buf[RPC_MAX_ADDRBUFLEN]; |
1da177e4 | 141 | printk(KERN_NOTICE |
ad06e4bd CL |
142 | "oversized read request from %s (%d bytes)\n", |
143 | svc_print_addr(rqstp, buf, sizeof(buf)), | |
1da177e4 | 144 | argp->count); |
7adae489 | 145 | argp->count = NFSSVC_MAXBLKSIZE_V2; |
1da177e4 | 146 | } |
cd123012 | 147 | svc_reserve_auth(rqstp, (19<<2) + argp->count + 4); |
1da177e4 LT |
148 | |
149 | resp->count = argp->count; | |
150 | nfserr = nfsd_read(rqstp, fh_copy(&resp->fh, &argp->fh), NULL, | |
151 | argp->offset, | |
3cc03b16 | 152 | rqstp->rq_vec, argp->vlen, |
1da177e4 LT |
153 | &resp->count); |
154 | ||
846f2fcd | 155 | if (nfserr) return nfserr; |
54775491 | 156 | return nfserrno(vfs_getattr(resp->fh.fh_export->ex_path.mnt, |
846f2fcd DS |
157 | resp->fh.fh_dentry, |
158 | &resp->stat)); | |
1da177e4 LT |
159 | } |
160 | ||
161 | /* | |
162 | * Write data to a file | |
163 | * N.B. After this call resp->fh needs an fh_put | |
164 | */ | |
7111c66e | 165 | static __be32 |
1da177e4 LT |
166 | nfsd_proc_write(struct svc_rqst *rqstp, struct nfsd_writeargs *argp, |
167 | struct nfsd_attrstat *resp) | |
168 | { | |
c4d987ba | 169 | __be32 nfserr; |
1da177e4 | 170 | int stable = 1; |
31dec253 | 171 | unsigned long cnt = argp->len; |
1da177e4 LT |
172 | |
173 | dprintk("nfsd: WRITE %s %d bytes at %d\n", | |
174 | SVCFH_fmt(&argp->fh), | |
175 | argp->len, argp->offset); | |
176 | ||
177 | nfserr = nfsd_write(rqstp, fh_copy(&resp->fh, &argp->fh), NULL, | |
178 | argp->offset, | |
3cc03b16 | 179 | rqstp->rq_vec, argp->vlen, |
31dec253 | 180 | &cnt, |
1da177e4 | 181 | &stable); |
846f2fcd | 182 | return nfsd_return_attrs(nfserr, resp); |
1da177e4 LT |
183 | } |
184 | ||
185 | /* | |
186 | * CREATE processing is complicated. The keyword here is `overloaded.' | |
187 | * The parent directory is kept locked between the check for existence | |
188 | * and the actual create() call in compliance with VFS protocols. | |
189 | * N.B. After this call _both_ argp->fh and resp->fh need an fh_put | |
190 | */ | |
7111c66e | 191 | static __be32 |
1da177e4 LT |
192 | nfsd_proc_create(struct svc_rqst *rqstp, struct nfsd_createargs *argp, |
193 | struct nfsd_diropres *resp) | |
194 | { | |
195 | svc_fh *dirfhp = &argp->fh; | |
196 | svc_fh *newfhp = &resp->fh; | |
197 | struct iattr *attr = &argp->attrs; | |
198 | struct inode *inode; | |
199 | struct dentry *dchild; | |
c4d987ba AV |
200 | int type, mode; |
201 | __be32 nfserr; | |
1da177e4 LT |
202 | dev_t rdev = 0, wanted = new_decode_dev(attr->ia_size); |
203 | ||
204 | dprintk("nfsd: CREATE %s %.*s\n", | |
205 | SVCFH_fmt(dirfhp), argp->len, argp->name); | |
206 | ||
207 | /* First verify the parent file handle */ | |
8837abca | 208 | nfserr = fh_verify(rqstp, dirfhp, S_IFDIR, NFSD_MAY_EXEC); |
1da177e4 LT |
209 | if (nfserr) |
210 | goto done; /* must fh_put dirfhp even on error */ | |
211 | ||
8837abca | 212 | /* Check for NFSD_MAY_WRITE in nfsd_create if necessary */ |
1da177e4 LT |
213 | |
214 | nfserr = nfserr_acces; | |
215 | if (!argp->len) | |
216 | goto done; | |
217 | nfserr = nfserr_exist; | |
218 | if (isdotent(argp->name, argp->len)) | |
219 | goto done; | |
7ed94296 | 220 | fh_lock_nested(dirfhp, I_MUTEX_PARENT); |
1da177e4 LT |
221 | dchild = lookup_one_len(argp->name, dirfhp->fh_dentry, argp->len); |
222 | if (IS_ERR(dchild)) { | |
223 | nfserr = nfserrno(PTR_ERR(dchild)); | |
224 | goto out_unlock; | |
225 | } | |
226 | fh_init(newfhp, NFS_FHSIZE); | |
227 | nfserr = fh_compose(newfhp, dirfhp->fh_export, dchild, dirfhp); | |
228 | if (!nfserr && !dchild->d_inode) | |
229 | nfserr = nfserr_noent; | |
230 | dput(dchild); | |
231 | if (nfserr) { | |
232 | if (nfserr != nfserr_noent) | |
233 | goto out_unlock; | |
234 | /* | |
235 | * If the new file handle wasn't verified, we can't tell | |
236 | * whether the file exists or not. Time to bail ... | |
237 | */ | |
238 | nfserr = nfserr_acces; | |
239 | if (!newfhp->fh_dentry) { | |
240 | printk(KERN_WARNING | |
241 | "nfsd_proc_create: file handle not verified\n"); | |
242 | goto out_unlock; | |
243 | } | |
244 | } | |
245 | ||
246 | inode = newfhp->fh_dentry->d_inode; | |
247 | ||
248 | /* Unfudge the mode bits */ | |
249 | if (attr->ia_valid & ATTR_MODE) { | |
250 | type = attr->ia_mode & S_IFMT; | |
251 | mode = attr->ia_mode & ~S_IFMT; | |
252 | if (!type) { | |
253 | /* no type, so if target exists, assume same as that, | |
254 | * else assume a file */ | |
255 | if (inode) { | |
256 | type = inode->i_mode & S_IFMT; | |
257 | switch(type) { | |
258 | case S_IFCHR: | |
259 | case S_IFBLK: | |
260 | /* reserve rdev for later checking */ | |
261 | rdev = inode->i_rdev; | |
262 | attr->ia_valid |= ATTR_SIZE; | |
263 | ||
264 | /* FALLTHROUGH */ | |
265 | case S_IFIFO: | |
266 | /* this is probably a permission check.. | |
267 | * at least IRIX implements perm checking on | |
268 | * echo thing > device-special-file-or-pipe | |
269 | * by doing a CREATE with type==0 | |
270 | */ | |
0ec757df BF |
271 | nfserr = nfsd_permission(rqstp, |
272 | newfhp->fh_export, | |
1da177e4 | 273 | newfhp->fh_dentry, |
8837abca | 274 | NFSD_MAY_WRITE|NFSD_MAY_LOCAL_ACCESS); |
1da177e4 LT |
275 | if (nfserr && nfserr != nfserr_rofs) |
276 | goto out_unlock; | |
277 | } | |
278 | } else | |
279 | type = S_IFREG; | |
280 | } | |
281 | } else if (inode) { | |
282 | type = inode->i_mode & S_IFMT; | |
283 | mode = inode->i_mode & ~S_IFMT; | |
284 | } else { | |
285 | type = S_IFREG; | |
286 | mode = 0; /* ??? */ | |
287 | } | |
288 | ||
289 | attr->ia_valid |= ATTR_MODE; | |
290 | attr->ia_mode = mode; | |
291 | ||
292 | /* Special treatment for non-regular files according to the | |
293 | * gospel of sun micro | |
294 | */ | |
295 | if (type != S_IFREG) { | |
296 | int is_borc = 0; | |
297 | if (type != S_IFBLK && type != S_IFCHR) { | |
298 | rdev = 0; | |
299 | } else if (type == S_IFCHR && !(attr->ia_valid & ATTR_SIZE)) { | |
300 | /* If you think you've seen the worst, grok this. */ | |
301 | type = S_IFIFO; | |
302 | } else { | |
303 | /* Okay, char or block special */ | |
304 | is_borc = 1; | |
305 | if (!rdev) | |
306 | rdev = wanted; | |
307 | } | |
308 | ||
309 | /* we've used the SIZE information, so discard it */ | |
310 | attr->ia_valid &= ~ATTR_SIZE; | |
311 | ||
312 | /* Make sure the type and device matches */ | |
313 | nfserr = nfserr_exist; | |
314 | if (inode && type != (inode->i_mode & S_IFMT)) | |
315 | goto out_unlock; | |
316 | } | |
317 | ||
318 | nfserr = 0; | |
319 | if (!inode) { | |
320 | /* File doesn't exist. Create it and set attrs */ | |
321 | nfserr = nfsd_create(rqstp, dirfhp, argp->name, argp->len, | |
322 | attr, type, rdev, newfhp); | |
323 | } else if (type == S_IFREG) { | |
324 | dprintk("nfsd: existing %s, valid=%x, size=%ld\n", | |
325 | argp->name, attr->ia_valid, (long) attr->ia_size); | |
326 | /* File already exists. We ignore all attributes except | |
327 | * size, so that creat() behaves exactly like | |
328 | * open(..., O_CREAT|O_TRUNC|O_WRONLY). | |
329 | */ | |
330 | attr->ia_valid &= ATTR_SIZE; | |
331 | if (attr->ia_valid) | |
332 | nfserr = nfsd_setattr(rqstp, newfhp, attr, 0, (time_t)0); | |
333 | } | |
334 | ||
335 | out_unlock: | |
336 | /* We don't really need to unlock, as fh_put does it. */ | |
337 | fh_unlock(dirfhp); | |
338 | ||
339 | done: | |
340 | fh_put(dirfhp); | |
846f2fcd | 341 | return nfsd_return_dirop(nfserr, resp); |
1da177e4 LT |
342 | } |
343 | ||
7111c66e | 344 | static __be32 |
1da177e4 LT |
345 | nfsd_proc_remove(struct svc_rqst *rqstp, struct nfsd_diropargs *argp, |
346 | void *resp) | |
347 | { | |
c4d987ba | 348 | __be32 nfserr; |
1da177e4 LT |
349 | |
350 | dprintk("nfsd: REMOVE %s %.*s\n", SVCFH_fmt(&argp->fh), | |
351 | argp->len, argp->name); | |
352 | ||
353 | /* Unlink. -SIFDIR means file must not be a directory */ | |
354 | nfserr = nfsd_unlink(rqstp, &argp->fh, -S_IFDIR, argp->name, argp->len); | |
355 | fh_put(&argp->fh); | |
356 | return nfserr; | |
357 | } | |
358 | ||
7111c66e | 359 | static __be32 |
1da177e4 LT |
360 | nfsd_proc_rename(struct svc_rqst *rqstp, struct nfsd_renameargs *argp, |
361 | void *resp) | |
362 | { | |
c4d987ba | 363 | __be32 nfserr; |
1da177e4 LT |
364 | |
365 | dprintk("nfsd: RENAME %s %.*s -> \n", | |
366 | SVCFH_fmt(&argp->ffh), argp->flen, argp->fname); | |
367 | dprintk("nfsd: -> %s %.*s\n", | |
368 | SVCFH_fmt(&argp->tfh), argp->tlen, argp->tname); | |
369 | ||
370 | nfserr = nfsd_rename(rqstp, &argp->ffh, argp->fname, argp->flen, | |
371 | &argp->tfh, argp->tname, argp->tlen); | |
372 | fh_put(&argp->ffh); | |
373 | fh_put(&argp->tfh); | |
374 | return nfserr; | |
375 | } | |
376 | ||
7111c66e | 377 | static __be32 |
1da177e4 LT |
378 | nfsd_proc_link(struct svc_rqst *rqstp, struct nfsd_linkargs *argp, |
379 | void *resp) | |
380 | { | |
c4d987ba | 381 | __be32 nfserr; |
1da177e4 LT |
382 | |
383 | dprintk("nfsd: LINK %s ->\n", | |
384 | SVCFH_fmt(&argp->ffh)); | |
385 | dprintk("nfsd: %s %.*s\n", | |
386 | SVCFH_fmt(&argp->tfh), | |
387 | argp->tlen, | |
388 | argp->tname); | |
389 | ||
390 | nfserr = nfsd_link(rqstp, &argp->tfh, argp->tname, argp->tlen, | |
391 | &argp->ffh); | |
392 | fh_put(&argp->ffh); | |
393 | fh_put(&argp->tfh); | |
394 | return nfserr; | |
395 | } | |
396 | ||
7111c66e | 397 | static __be32 |
1da177e4 LT |
398 | nfsd_proc_symlink(struct svc_rqst *rqstp, struct nfsd_symlinkargs *argp, |
399 | void *resp) | |
400 | { | |
401 | struct svc_fh newfh; | |
c4d987ba | 402 | __be32 nfserr; |
1da177e4 LT |
403 | |
404 | dprintk("nfsd: SYMLINK %s %.*s -> %.*s\n", | |
405 | SVCFH_fmt(&argp->ffh), argp->flen, argp->fname, | |
406 | argp->tlen, argp->tname); | |
407 | ||
408 | fh_init(&newfh, NFS_FHSIZE); | |
409 | /* | |
410 | * Create the link, look up new file and set attrs. | |
411 | */ | |
412 | nfserr = nfsd_symlink(rqstp, &argp->ffh, argp->fname, argp->flen, | |
413 | argp->tname, argp->tlen, | |
414 | &newfh, &argp->attrs); | |
415 | ||
416 | ||
417 | fh_put(&argp->ffh); | |
418 | fh_put(&newfh); | |
419 | return nfserr; | |
420 | } | |
421 | ||
422 | /* | |
423 | * Make directory. This operation is not idempotent. | |
424 | * N.B. After this call resp->fh needs an fh_put | |
425 | */ | |
7111c66e | 426 | static __be32 |
1da177e4 LT |
427 | nfsd_proc_mkdir(struct svc_rqst *rqstp, struct nfsd_createargs *argp, |
428 | struct nfsd_diropres *resp) | |
429 | { | |
c4d987ba | 430 | __be32 nfserr; |
1da177e4 LT |
431 | |
432 | dprintk("nfsd: MKDIR %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name); | |
433 | ||
434 | if (resp->fh.fh_dentry) { | |
435 | printk(KERN_WARNING | |
436 | "nfsd_proc_mkdir: response already verified??\n"); | |
437 | } | |
438 | ||
439 | argp->attrs.ia_valid &= ~ATTR_SIZE; | |
440 | fh_init(&resp->fh, NFS_FHSIZE); | |
441 | nfserr = nfsd_create(rqstp, &argp->fh, argp->name, argp->len, | |
442 | &argp->attrs, S_IFDIR, 0, &resp->fh); | |
443 | fh_put(&argp->fh); | |
846f2fcd | 444 | return nfsd_return_dirop(nfserr, resp); |
1da177e4 LT |
445 | } |
446 | ||
447 | /* | |
448 | * Remove a directory | |
449 | */ | |
7111c66e | 450 | static __be32 |
1da177e4 LT |
451 | nfsd_proc_rmdir(struct svc_rqst *rqstp, struct nfsd_diropargs *argp, |
452 | void *resp) | |
453 | { | |
c4d987ba | 454 | __be32 nfserr; |
1da177e4 LT |
455 | |
456 | dprintk("nfsd: RMDIR %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name); | |
457 | ||
458 | nfserr = nfsd_unlink(rqstp, &argp->fh, S_IFDIR, argp->name, argp->len); | |
459 | fh_put(&argp->fh); | |
460 | return nfserr; | |
461 | } | |
462 | ||
463 | /* | |
464 | * Read a portion of a directory. | |
465 | */ | |
7111c66e | 466 | static __be32 |
1da177e4 LT |
467 | nfsd_proc_readdir(struct svc_rqst *rqstp, struct nfsd_readdirargs *argp, |
468 | struct nfsd_readdirres *resp) | |
469 | { | |
c4d987ba AV |
470 | int count; |
471 | __be32 nfserr; | |
1da177e4 LT |
472 | loff_t offset; |
473 | ||
474 | dprintk("nfsd: READDIR %s %d bytes at %d\n", | |
475 | SVCFH_fmt(&argp->fh), | |
476 | argp->count, argp->cookie); | |
477 | ||
478 | /* Shrink to the client read size */ | |
479 | count = (argp->count >> 2) - 2; | |
480 | ||
481 | /* Make sure we've room for the NULL ptr & eof flag */ | |
482 | count -= 2; | |
483 | if (count < 0) | |
484 | count = 0; | |
485 | ||
486 | resp->buffer = argp->buffer; | |
487 | resp->offset = NULL; | |
488 | resp->buflen = count; | |
489 | resp->common.err = nfs_ok; | |
490 | /* Read directory and encode entries on the fly */ | |
491 | offset = argp->cookie; | |
492 | nfserr = nfsd_readdir(rqstp, &argp->fh, &offset, | |
493 | &resp->common, nfssvc_encode_entry); | |
494 | ||
495 | resp->count = resp->buffer - argp->buffer; | |
496 | if (resp->offset) | |
497 | *resp->offset = htonl(offset); | |
498 | ||
499 | fh_put(&argp->fh); | |
500 | return nfserr; | |
501 | } | |
502 | ||
503 | /* | |
504 | * Get file system info | |
505 | */ | |
7111c66e | 506 | static __be32 |
1da177e4 LT |
507 | nfsd_proc_statfs(struct svc_rqst * rqstp, struct nfsd_fhandle *argp, |
508 | struct nfsd_statfsres *resp) | |
509 | { | |
c4d987ba | 510 | __be32 nfserr; |
1da177e4 LT |
511 | |
512 | dprintk("nfsd: STATFS %s\n", SVCFH_fmt(&argp->fh)); | |
513 | ||
04716e66 BF |
514 | nfserr = nfsd_statfs(rqstp, &argp->fh, &resp->stats, |
515 | NFSD_MAY_BYPASS_GSS_ON_ROOT); | |
1da177e4 LT |
516 | fh_put(&argp->fh); |
517 | return nfserr; | |
518 | } | |
519 | ||
520 | /* | |
521 | * NFSv2 Server procedures. | |
522 | * Only the results of non-idempotent operations are cached. | |
523 | */ | |
1da177e4 LT |
524 | struct nfsd_void { int dummy; }; |
525 | ||
1da177e4 LT |
526 | #define ST 1 /* status */ |
527 | #define FH 8 /* filehandle */ | |
528 | #define AT 18 /* attributes */ | |
529 | ||
530 | static struct svc_procedure nfsd_procedures2[18] = { | |
b9081d90 YZ |
531 | [NFSPROC_NULL] = { |
532 | .pc_func = (svc_procfunc) nfsd_proc_null, | |
533 | .pc_decode = (kxdrproc_t) nfssvc_decode_void, | |
534 | .pc_encode = (kxdrproc_t) nfssvc_encode_void, | |
535 | .pc_argsize = sizeof(struct nfsd_void), | |
536 | .pc_ressize = sizeof(struct nfsd_void), | |
537 | .pc_cachetype = RC_NOCACHE, | |
538 | .pc_xdrressize = ST, | |
539 | }, | |
540 | [NFSPROC_GETATTR] = { | |
541 | .pc_func = (svc_procfunc) nfsd_proc_getattr, | |
542 | .pc_decode = (kxdrproc_t) nfssvc_decode_fhandle, | |
543 | .pc_encode = (kxdrproc_t) nfssvc_encode_attrstat, | |
544 | .pc_release = (kxdrproc_t) nfssvc_release_fhandle, | |
545 | .pc_argsize = sizeof(struct nfsd_fhandle), | |
546 | .pc_ressize = sizeof(struct nfsd_attrstat), | |
547 | .pc_cachetype = RC_NOCACHE, | |
548 | .pc_xdrressize = ST+AT, | |
549 | }, | |
550 | [NFSPROC_SETATTR] = { | |
551 | .pc_func = (svc_procfunc) nfsd_proc_setattr, | |
552 | .pc_decode = (kxdrproc_t) nfssvc_decode_sattrargs, | |
553 | .pc_encode = (kxdrproc_t) nfssvc_encode_attrstat, | |
554 | .pc_release = (kxdrproc_t) nfssvc_release_fhandle, | |
555 | .pc_argsize = sizeof(struct nfsd_sattrargs), | |
556 | .pc_ressize = sizeof(struct nfsd_attrstat), | |
557 | .pc_cachetype = RC_REPLBUFF, | |
558 | .pc_xdrressize = ST+AT, | |
559 | }, | |
560 | [NFSPROC_ROOT] = { | |
561 | .pc_decode = (kxdrproc_t) nfssvc_decode_void, | |
562 | .pc_encode = (kxdrproc_t) nfssvc_encode_void, | |
563 | .pc_argsize = sizeof(struct nfsd_void), | |
564 | .pc_ressize = sizeof(struct nfsd_void), | |
565 | .pc_cachetype = RC_NOCACHE, | |
566 | .pc_xdrressize = ST, | |
567 | }, | |
568 | [NFSPROC_LOOKUP] = { | |
569 | .pc_func = (svc_procfunc) nfsd_proc_lookup, | |
570 | .pc_decode = (kxdrproc_t) nfssvc_decode_diropargs, | |
571 | .pc_encode = (kxdrproc_t) nfssvc_encode_diropres, | |
572 | .pc_release = (kxdrproc_t) nfssvc_release_fhandle, | |
573 | .pc_argsize = sizeof(struct nfsd_diropargs), | |
574 | .pc_ressize = sizeof(struct nfsd_diropres), | |
575 | .pc_cachetype = RC_NOCACHE, | |
576 | .pc_xdrressize = ST+FH+AT, | |
577 | }, | |
578 | [NFSPROC_READLINK] = { | |
579 | .pc_func = (svc_procfunc) nfsd_proc_readlink, | |
580 | .pc_decode = (kxdrproc_t) nfssvc_decode_readlinkargs, | |
581 | .pc_encode = (kxdrproc_t) nfssvc_encode_readlinkres, | |
582 | .pc_argsize = sizeof(struct nfsd_readlinkargs), | |
583 | .pc_ressize = sizeof(struct nfsd_readlinkres), | |
584 | .pc_cachetype = RC_NOCACHE, | |
585 | .pc_xdrressize = ST+1+NFS_MAXPATHLEN/4, | |
586 | }, | |
587 | [NFSPROC_READ] = { | |
588 | .pc_func = (svc_procfunc) nfsd_proc_read, | |
589 | .pc_decode = (kxdrproc_t) nfssvc_decode_readargs, | |
590 | .pc_encode = (kxdrproc_t) nfssvc_encode_readres, | |
591 | .pc_release = (kxdrproc_t) nfssvc_release_fhandle, | |
592 | .pc_argsize = sizeof(struct nfsd_readargs), | |
593 | .pc_ressize = sizeof(struct nfsd_readres), | |
594 | .pc_cachetype = RC_NOCACHE, | |
595 | .pc_xdrressize = ST+AT+1+NFSSVC_MAXBLKSIZE_V2/4, | |
596 | }, | |
597 | [NFSPROC_WRITECACHE] = { | |
598 | .pc_decode = (kxdrproc_t) nfssvc_decode_void, | |
599 | .pc_encode = (kxdrproc_t) nfssvc_encode_void, | |
600 | .pc_argsize = sizeof(struct nfsd_void), | |
601 | .pc_ressize = sizeof(struct nfsd_void), | |
602 | .pc_cachetype = RC_NOCACHE, | |
603 | .pc_xdrressize = ST, | |
604 | }, | |
605 | [NFSPROC_WRITE] = { | |
606 | .pc_func = (svc_procfunc) nfsd_proc_write, | |
607 | .pc_decode = (kxdrproc_t) nfssvc_decode_writeargs, | |
608 | .pc_encode = (kxdrproc_t) nfssvc_encode_attrstat, | |
609 | .pc_release = (kxdrproc_t) nfssvc_release_fhandle, | |
610 | .pc_argsize = sizeof(struct nfsd_writeargs), | |
611 | .pc_ressize = sizeof(struct nfsd_attrstat), | |
612 | .pc_cachetype = RC_REPLBUFF, | |
613 | .pc_xdrressize = ST+AT, | |
614 | }, | |
615 | [NFSPROC_CREATE] = { | |
616 | .pc_func = (svc_procfunc) nfsd_proc_create, | |
617 | .pc_decode = (kxdrproc_t) nfssvc_decode_createargs, | |
618 | .pc_encode = (kxdrproc_t) nfssvc_encode_diropres, | |
619 | .pc_release = (kxdrproc_t) nfssvc_release_fhandle, | |
620 | .pc_argsize = sizeof(struct nfsd_createargs), | |
621 | .pc_ressize = sizeof(struct nfsd_diropres), | |
622 | .pc_cachetype = RC_REPLBUFF, | |
623 | .pc_xdrressize = ST+FH+AT, | |
624 | }, | |
625 | [NFSPROC_REMOVE] = { | |
626 | .pc_func = (svc_procfunc) nfsd_proc_remove, | |
627 | .pc_decode = (kxdrproc_t) nfssvc_decode_diropargs, | |
628 | .pc_encode = (kxdrproc_t) nfssvc_encode_void, | |
629 | .pc_argsize = sizeof(struct nfsd_diropargs), | |
630 | .pc_ressize = sizeof(struct nfsd_void), | |
631 | .pc_cachetype = RC_REPLSTAT, | |
632 | .pc_xdrressize = ST, | |
633 | }, | |
634 | [NFSPROC_RENAME] = { | |
635 | .pc_func = (svc_procfunc) nfsd_proc_rename, | |
636 | .pc_decode = (kxdrproc_t) nfssvc_decode_renameargs, | |
637 | .pc_encode = (kxdrproc_t) nfssvc_encode_void, | |
638 | .pc_argsize = sizeof(struct nfsd_renameargs), | |
639 | .pc_ressize = sizeof(struct nfsd_void), | |
640 | .pc_cachetype = RC_REPLSTAT, | |
641 | .pc_xdrressize = ST, | |
642 | }, | |
643 | [NFSPROC_LINK] = { | |
644 | .pc_func = (svc_procfunc) nfsd_proc_link, | |
645 | .pc_decode = (kxdrproc_t) nfssvc_decode_linkargs, | |
646 | .pc_encode = (kxdrproc_t) nfssvc_encode_void, | |
647 | .pc_argsize = sizeof(struct nfsd_linkargs), | |
648 | .pc_ressize = sizeof(struct nfsd_void), | |
649 | .pc_cachetype = RC_REPLSTAT, | |
650 | .pc_xdrressize = ST, | |
651 | }, | |
652 | [NFSPROC_SYMLINK] = { | |
653 | .pc_func = (svc_procfunc) nfsd_proc_symlink, | |
654 | .pc_decode = (kxdrproc_t) nfssvc_decode_symlinkargs, | |
655 | .pc_encode = (kxdrproc_t) nfssvc_encode_void, | |
656 | .pc_argsize = sizeof(struct nfsd_symlinkargs), | |
657 | .pc_ressize = sizeof(struct nfsd_void), | |
658 | .pc_cachetype = RC_REPLSTAT, | |
659 | .pc_xdrressize = ST, | |
660 | }, | |
661 | [NFSPROC_MKDIR] = { | |
662 | .pc_func = (svc_procfunc) nfsd_proc_mkdir, | |
663 | .pc_decode = (kxdrproc_t) nfssvc_decode_createargs, | |
664 | .pc_encode = (kxdrproc_t) nfssvc_encode_diropres, | |
665 | .pc_release = (kxdrproc_t) nfssvc_release_fhandle, | |
666 | .pc_argsize = sizeof(struct nfsd_createargs), | |
667 | .pc_ressize = sizeof(struct nfsd_diropres), | |
668 | .pc_cachetype = RC_REPLBUFF, | |
669 | .pc_xdrressize = ST+FH+AT, | |
670 | }, | |
671 | [NFSPROC_RMDIR] = { | |
672 | .pc_func = (svc_procfunc) nfsd_proc_rmdir, | |
673 | .pc_decode = (kxdrproc_t) nfssvc_decode_diropargs, | |
674 | .pc_encode = (kxdrproc_t) nfssvc_encode_void, | |
675 | .pc_argsize = sizeof(struct nfsd_diropargs), | |
676 | .pc_ressize = sizeof(struct nfsd_void), | |
677 | .pc_cachetype = RC_REPLSTAT, | |
678 | .pc_xdrressize = ST, | |
679 | }, | |
680 | [NFSPROC_READDIR] = { | |
681 | .pc_func = (svc_procfunc) nfsd_proc_readdir, | |
682 | .pc_decode = (kxdrproc_t) nfssvc_decode_readdirargs, | |
683 | .pc_encode = (kxdrproc_t) nfssvc_encode_readdirres, | |
684 | .pc_argsize = sizeof(struct nfsd_readdirargs), | |
685 | .pc_ressize = sizeof(struct nfsd_readdirres), | |
686 | .pc_cachetype = RC_NOCACHE, | |
687 | }, | |
688 | [NFSPROC_STATFS] = { | |
689 | .pc_func = (svc_procfunc) nfsd_proc_statfs, | |
690 | .pc_decode = (kxdrproc_t) nfssvc_decode_fhandle, | |
691 | .pc_encode = (kxdrproc_t) nfssvc_encode_statfsres, | |
692 | .pc_argsize = sizeof(struct nfsd_fhandle), | |
693 | .pc_ressize = sizeof(struct nfsd_statfsres), | |
694 | .pc_cachetype = RC_NOCACHE, | |
695 | .pc_xdrressize = ST+5, | |
696 | }, | |
1da177e4 LT |
697 | }; |
698 | ||
699 | ||
700 | struct svc_version nfsd_version2 = { | |
701 | .vs_vers = 2, | |
702 | .vs_nproc = 18, | |
703 | .vs_proc = nfsd_procedures2, | |
704 | .vs_dispatch = nfsd_dispatch, | |
705 | .vs_xdrsize = NFS2_SVC_XDRSIZE, | |
706 | }; | |
707 | ||
708 | /* | |
709 | * Map errnos to NFS errnos. | |
710 | */ | |
63f10311 | 711 | __be32 |
1da177e4 LT |
712 | nfserrno (int errno) |
713 | { | |
714 | static struct { | |
63f10311 | 715 | __be32 nfserr; |
1da177e4 LT |
716 | int syserr; |
717 | } nfs_errtbl[] = { | |
718 | { nfs_ok, 0 }, | |
719 | { nfserr_perm, -EPERM }, | |
720 | { nfserr_noent, -ENOENT }, | |
721 | { nfserr_io, -EIO }, | |
722 | { nfserr_nxio, -ENXIO }, | |
723 | { nfserr_acces, -EACCES }, | |
724 | { nfserr_exist, -EEXIST }, | |
725 | { nfserr_xdev, -EXDEV }, | |
726 | { nfserr_mlink, -EMLINK }, | |
727 | { nfserr_nodev, -ENODEV }, | |
728 | { nfserr_notdir, -ENOTDIR }, | |
729 | { nfserr_isdir, -EISDIR }, | |
730 | { nfserr_inval, -EINVAL }, | |
731 | { nfserr_fbig, -EFBIG }, | |
732 | { nfserr_nospc, -ENOSPC }, | |
733 | { nfserr_rofs, -EROFS }, | |
734 | { nfserr_mlink, -EMLINK }, | |
735 | { nfserr_nametoolong, -ENAMETOOLONG }, | |
736 | { nfserr_notempty, -ENOTEMPTY }, | |
737 | #ifdef EDQUOT | |
738 | { nfserr_dquot, -EDQUOT }, | |
739 | #endif | |
740 | { nfserr_stale, -ESTALE }, | |
741 | { nfserr_jukebox, -ETIMEDOUT }, | |
599eb304 | 742 | { nfserr_jukebox, -ERESTARTSYS }, |
1da177e4 LT |
743 | { nfserr_dropit, -EAGAIN }, |
744 | { nfserr_dropit, -ENOMEM }, | |
745 | { nfserr_badname, -ESRCH }, | |
746 | { nfserr_io, -ETXTBSY }, | |
a838cc49 | 747 | { nfserr_notsupp, -EOPNOTSUPP }, |
b7aeda40 | 748 | { nfserr_toosmall, -ETOOSMALL }, |
f39bde24 | 749 | { nfserr_serverfault, -ESERVERFAULT }, |
1da177e4 LT |
750 | }; |
751 | int i; | |
752 | ||
63f10311 | 753 | for (i = 0; i < ARRAY_SIZE(nfs_errtbl); i++) { |
1da177e4 LT |
754 | if (nfs_errtbl[i].syserr == errno) |
755 | return nfs_errtbl[i].nfserr; | |
756 | } | |
757 | printk (KERN_INFO "nfsd: non-standard errno: %d\n", errno); | |
758 | return nfserr_io; | |
759 | } | |
760 |