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