]>
Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Process version 2 NFS requests. |
3 | * | |
4 | * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de> | |
5 | */ | |
6 | ||
1da177e4 | 7 | #include <linux/namei.h> |
1da177e4 | 8 | |
9a74af21 BH |
9 | #include "cache.h" |
10 | #include "xdr.h" | |
0a3adade | 11 | #include "vfs.h" |
1da177e4 LT |
12 | |
13 | typedef struct svc_rqst svc_rqst; | |
14 | typedef struct svc_buf svc_buf; | |
15 | ||
16 | #define NFSDDBG_FACILITY NFSDDBG_PROC | |
17 | ||
18 | ||
7111c66e | 19 | static __be32 |
1da177e4 LT |
20 | nfsd_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) |
21 | { | |
22 | return nfs_ok; | |
23 | } | |
24 | ||
c4d987ba AV |
25 | static __be32 |
26 | nfsd_return_attrs(__be32 err, struct nfsd_attrstat *resp) | |
846f2fcd DS |
27 | { |
28 | if (err) return err; | |
3dadecce | 29 | return fh_getattr(&resp->fh, &resp->stat); |
846f2fcd | 30 | } |
c4d987ba AV |
31 | static __be32 |
32 | nfsd_return_dirop(__be32 err, struct nfsd_diropres *resp) | |
846f2fcd DS |
33 | { |
34 | if (err) return err; | |
3dadecce | 35 | return fh_getattr(&resp->fh, &resp->stat); |
846f2fcd | 36 | } |
1da177e4 LT |
37 | /* |
38 | * Get a file's attributes | |
39 | * N.B. After this call resp->fh needs an fh_put | |
40 | */ | |
7111c66e | 41 | static __be32 |
1da177e4 LT |
42 | nfsd_proc_getattr(struct svc_rqst *rqstp, struct nfsd_fhandle *argp, |
43 | struct nfsd_attrstat *resp) | |
44 | { | |
c4d987ba | 45 | __be32 nfserr; |
1da177e4 LT |
46 | dprintk("nfsd: GETATTR %s\n", SVCFH_fmt(&argp->fh)); |
47 | ||
48 | fh_copy(&resp->fh, &argp->fh); | |
04716e66 BF |
49 | nfserr = fh_verify(rqstp, &resp->fh, 0, |
50 | NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT); | |
846f2fcd | 51 | return nfsd_return_attrs(nfserr, resp); |
1da177e4 LT |
52 | } |
53 | ||
54 | /* | |
55 | * Set a file's attributes | |
56 | * N.B. After this call resp->fh needs an fh_put | |
57 | */ | |
7111c66e | 58 | static __be32 |
1da177e4 LT |
59 | nfsd_proc_setattr(struct svc_rqst *rqstp, struct nfsd_sattrargs *argp, |
60 | struct nfsd_attrstat *resp) | |
61 | { | |
cc265089 AG |
62 | struct iattr *iap = &argp->attrs; |
63 | struct svc_fh *fhp; | |
c4d987ba | 64 | __be32 nfserr; |
cc265089 | 65 | |
1da177e4 LT |
66 | dprintk("nfsd: SETATTR %s, valid=%x, size=%ld\n", |
67 | SVCFH_fmt(&argp->fh), | |
68 | argp->attrs.ia_valid, (long) argp->attrs.ia_size); | |
69 | ||
cc265089 AG |
70 | fhp = fh_copy(&resp->fh, &argp->fh); |
71 | ||
72 | /* | |
73 | * NFSv2 does not differentiate between "set-[ac]time-to-now" | |
74 | * which only requires access, and "set-[ac]time-to-X" which | |
75 | * requires ownership. | |
76 | * So if it looks like it might be "set both to the same time which | |
77 | * is close to now", and if inode_change_ok fails, then we | |
78 | * convert to "set to now" instead of "set to explicit time" | |
79 | * | |
80 | * We only call inode_change_ok as the last test as technically | |
81 | * it is not an interface that we should be using. | |
82 | */ | |
83 | #define BOTH_TIME_SET (ATTR_ATIME_SET | ATTR_MTIME_SET) | |
84 | #define MAX_TOUCH_TIME_ERROR (30*60) | |
85 | if ((iap->ia_valid & BOTH_TIME_SET) == BOTH_TIME_SET && | |
86 | iap->ia_mtime.tv_sec == iap->ia_atime.tv_sec) { | |
87 | /* | |
88 | * Looks probable. | |
89 | * | |
90 | * Now just make sure time is in the right ballpark. | |
91 | * Solaris, at least, doesn't seem to care what the time | |
92 | * request is. We require it be within 30 minutes of now. | |
93 | */ | |
94 | time_t delta = iap->ia_atime.tv_sec - get_seconds(); | |
95 | struct inode *inode; | |
96 | ||
97 | nfserr = fh_verify(rqstp, fhp, 0, NFSD_MAY_NOP); | |
98 | if (nfserr) | |
99 | goto done; | |
100 | inode = d_inode(fhp->fh_dentry); | |
101 | ||
102 | if (delta < 0) | |
103 | delta = -delta; | |
104 | if (delta < MAX_TOUCH_TIME_ERROR && | |
105 | inode_change_ok(inode, iap) != 0) { | |
106 | /* | |
107 | * Turn off ATTR_[AM]TIME_SET but leave ATTR_[AM]TIME. | |
108 | * This will cause notify_change to set these times | |
109 | * to "now" | |
110 | */ | |
111 | iap->ia_valid &= ~BOTH_TIME_SET; | |
112 | } | |
113 | } | |
114 | ||
115 | nfserr = nfsd_setattr(rqstp, fhp, iap, 0, (time_t)0); | |
116 | done: | |
846f2fcd | 117 | return nfsd_return_attrs(nfserr, resp); |
1da177e4 LT |
118 | } |
119 | ||
120 | /* | |
121 | * Look up a path name component | |
122 | * Note: the dentry in the resp->fh may be negative if the file | |
123 | * doesn't exist yet. | |
124 | * N.B. After this call resp->fh needs an fh_put | |
125 | */ | |
7111c66e | 126 | static __be32 |
1da177e4 LT |
127 | nfsd_proc_lookup(struct svc_rqst *rqstp, struct nfsd_diropargs *argp, |
128 | struct nfsd_diropres *resp) | |
129 | { | |
c4d987ba | 130 | __be32 nfserr; |
1da177e4 LT |
131 | |
132 | dprintk("nfsd: LOOKUP %s %.*s\n", | |
133 | SVCFH_fmt(&argp->fh), argp->len, argp->name); | |
134 | ||
135 | fh_init(&resp->fh, NFS_FHSIZE); | |
136 | nfserr = nfsd_lookup(rqstp, &argp->fh, argp->name, argp->len, | |
137 | &resp->fh); | |
138 | ||
139 | fh_put(&argp->fh); | |
846f2fcd | 140 | return nfsd_return_dirop(nfserr, resp); |
1da177e4 LT |
141 | } |
142 | ||
143 | /* | |
144 | * Read a symlink. | |
145 | */ | |
7111c66e | 146 | static __be32 |
1da177e4 LT |
147 | nfsd_proc_readlink(struct svc_rqst *rqstp, struct nfsd_readlinkargs *argp, |
148 | struct nfsd_readlinkres *resp) | |
149 | { | |
c4d987ba | 150 | __be32 nfserr; |
1da177e4 LT |
151 | |
152 | dprintk("nfsd: READLINK %s\n", SVCFH_fmt(&argp->fh)); | |
153 | ||
154 | /* Read the symlink. */ | |
155 | resp->len = NFS_MAXPATHLEN; | |
156 | nfserr = nfsd_readlink(rqstp, &argp->fh, argp->buffer, &resp->len); | |
157 | ||
158 | fh_put(&argp->fh); | |
159 | return nfserr; | |
160 | } | |
161 | ||
162 | /* | |
163 | * Read a portion of a file. | |
164 | * N.B. After this call resp->fh needs an fh_put | |
165 | */ | |
7111c66e | 166 | static __be32 |
1da177e4 LT |
167 | nfsd_proc_read(struct svc_rqst *rqstp, struct nfsd_readargs *argp, |
168 | struct nfsd_readres *resp) | |
169 | { | |
c4d987ba | 170 | __be32 nfserr; |
1da177e4 LT |
171 | |
172 | dprintk("nfsd: READ %s %d bytes at %d\n", | |
173 | SVCFH_fmt(&argp->fh), | |
174 | argp->count, argp->offset); | |
175 | ||
176 | /* Obtain buffer pointer for payload. 19 is 1 word for | |
177 | * status, 17 words for fattr, and 1 word for the byte count. | |
178 | */ | |
179 | ||
7adae489 | 180 | if (NFSSVC_MAXBLKSIZE_V2 < argp->count) { |
ad06e4bd | 181 | char buf[RPC_MAX_ADDRBUFLEN]; |
1da177e4 | 182 | printk(KERN_NOTICE |
ad06e4bd CL |
183 | "oversized read request from %s (%d bytes)\n", |
184 | svc_print_addr(rqstp, buf, sizeof(buf)), | |
1da177e4 | 185 | argp->count); |
7adae489 | 186 | argp->count = NFSSVC_MAXBLKSIZE_V2; |
1da177e4 | 187 | } |
cd123012 | 188 | svc_reserve_auth(rqstp, (19<<2) + argp->count + 4); |
1da177e4 LT |
189 | |
190 | resp->count = argp->count; | |
039a87ca | 191 | nfserr = nfsd_read(rqstp, fh_copy(&resp->fh, &argp->fh), |
1da177e4 | 192 | argp->offset, |
3cc03b16 | 193 | rqstp->rq_vec, argp->vlen, |
1da177e4 LT |
194 | &resp->count); |
195 | ||
846f2fcd | 196 | if (nfserr) return nfserr; |
3dadecce | 197 | return fh_getattr(&resp->fh, &resp->stat); |
1da177e4 LT |
198 | } |
199 | ||
200 | /* | |
201 | * Write data to a file | |
202 | * N.B. After this call resp->fh needs an fh_put | |
203 | */ | |
7111c66e | 204 | static __be32 |
1da177e4 LT |
205 | nfsd_proc_write(struct svc_rqst *rqstp, struct nfsd_writeargs *argp, |
206 | struct nfsd_attrstat *resp) | |
207 | { | |
c4d987ba | 208 | __be32 nfserr; |
1da177e4 | 209 | int stable = 1; |
31dec253 | 210 | unsigned long cnt = argp->len; |
1da177e4 LT |
211 | |
212 | dprintk("nfsd: WRITE %s %d bytes at %d\n", | |
213 | SVCFH_fmt(&argp->fh), | |
214 | argp->len, argp->offset); | |
215 | ||
216 | nfserr = nfsd_write(rqstp, fh_copy(&resp->fh, &argp->fh), NULL, | |
217 | argp->offset, | |
3cc03b16 | 218 | rqstp->rq_vec, argp->vlen, |
31dec253 | 219 | &cnt, |
1da177e4 | 220 | &stable); |
846f2fcd | 221 | return nfsd_return_attrs(nfserr, resp); |
1da177e4 LT |
222 | } |
223 | ||
224 | /* | |
225 | * CREATE processing is complicated. The keyword here is `overloaded.' | |
226 | * The parent directory is kept locked between the check for existence | |
227 | * and the actual create() call in compliance with VFS protocols. | |
228 | * N.B. After this call _both_ argp->fh and resp->fh need an fh_put | |
229 | */ | |
7111c66e | 230 | static __be32 |
1da177e4 LT |
231 | nfsd_proc_create(struct svc_rqst *rqstp, struct nfsd_createargs *argp, |
232 | struct nfsd_diropres *resp) | |
233 | { | |
234 | svc_fh *dirfhp = &argp->fh; | |
235 | svc_fh *newfhp = &resp->fh; | |
236 | struct iattr *attr = &argp->attrs; | |
237 | struct inode *inode; | |
238 | struct dentry *dchild; | |
c4d987ba AV |
239 | int type, mode; |
240 | __be32 nfserr; | |
4a55c101 | 241 | int hosterr; |
1da177e4 LT |
242 | dev_t rdev = 0, wanted = new_decode_dev(attr->ia_size); |
243 | ||
244 | dprintk("nfsd: CREATE %s %.*s\n", | |
245 | SVCFH_fmt(dirfhp), argp->len, argp->name); | |
246 | ||
247 | /* First verify the parent file handle */ | |
8837abca | 248 | nfserr = fh_verify(rqstp, dirfhp, S_IFDIR, NFSD_MAY_EXEC); |
1da177e4 LT |
249 | if (nfserr) |
250 | goto done; /* must fh_put dirfhp even on error */ | |
251 | ||
8837abca | 252 | /* Check for NFSD_MAY_WRITE in nfsd_create if necessary */ |
1da177e4 LT |
253 | |
254 | nfserr = nfserr_acces; | |
255 | if (!argp->len) | |
256 | goto done; | |
257 | nfserr = nfserr_exist; | |
258 | if (isdotent(argp->name, argp->len)) | |
259 | goto done; | |
4a55c101 JK |
260 | hosterr = fh_want_write(dirfhp); |
261 | if (hosterr) { | |
262 | nfserr = nfserrno(hosterr); | |
263 | goto done; | |
264 | } | |
265 | ||
7ed94296 | 266 | fh_lock_nested(dirfhp, I_MUTEX_PARENT); |
1da177e4 LT |
267 | dchild = lookup_one_len(argp->name, dirfhp->fh_dentry, argp->len); |
268 | if (IS_ERR(dchild)) { | |
269 | nfserr = nfserrno(PTR_ERR(dchild)); | |
270 | goto out_unlock; | |
271 | } | |
272 | fh_init(newfhp, NFS_FHSIZE); | |
273 | nfserr = fh_compose(newfhp, dirfhp->fh_export, dchild, dirfhp); | |
2b0143b5 | 274 | if (!nfserr && d_really_is_negative(dchild)) |
1da177e4 LT |
275 | nfserr = nfserr_noent; |
276 | dput(dchild); | |
277 | if (nfserr) { | |
278 | if (nfserr != nfserr_noent) | |
279 | goto out_unlock; | |
280 | /* | |
281 | * If the new file handle wasn't verified, we can't tell | |
282 | * whether the file exists or not. Time to bail ... | |
283 | */ | |
284 | nfserr = nfserr_acces; | |
285 | if (!newfhp->fh_dentry) { | |
286 | printk(KERN_WARNING | |
287 | "nfsd_proc_create: file handle not verified\n"); | |
288 | goto out_unlock; | |
289 | } | |
290 | } | |
291 | ||
2b0143b5 | 292 | inode = d_inode(newfhp->fh_dentry); |
1da177e4 LT |
293 | |
294 | /* Unfudge the mode bits */ | |
295 | if (attr->ia_valid & ATTR_MODE) { | |
296 | type = attr->ia_mode & S_IFMT; | |
297 | mode = attr->ia_mode & ~S_IFMT; | |
298 | if (!type) { | |
299 | /* no type, so if target exists, assume same as that, | |
300 | * else assume a file */ | |
301 | if (inode) { | |
302 | type = inode->i_mode & S_IFMT; | |
303 | switch(type) { | |
304 | case S_IFCHR: | |
305 | case S_IFBLK: | |
306 | /* reserve rdev for later checking */ | |
307 | rdev = inode->i_rdev; | |
308 | attr->ia_valid |= ATTR_SIZE; | |
309 | ||
310 | /* FALLTHROUGH */ | |
311 | case S_IFIFO: | |
312 | /* this is probably a permission check.. | |
313 | * at least IRIX implements perm checking on | |
314 | * echo thing > device-special-file-or-pipe | |
315 | * by doing a CREATE with type==0 | |
316 | */ | |
0ec757df BF |
317 | nfserr = nfsd_permission(rqstp, |
318 | newfhp->fh_export, | |
1da177e4 | 319 | newfhp->fh_dentry, |
8837abca | 320 | NFSD_MAY_WRITE|NFSD_MAY_LOCAL_ACCESS); |
1da177e4 LT |
321 | if (nfserr && nfserr != nfserr_rofs) |
322 | goto out_unlock; | |
323 | } | |
324 | } else | |
325 | type = S_IFREG; | |
326 | } | |
327 | } else if (inode) { | |
328 | type = inode->i_mode & S_IFMT; | |
329 | mode = inode->i_mode & ~S_IFMT; | |
330 | } else { | |
331 | type = S_IFREG; | |
332 | mode = 0; /* ??? */ | |
333 | } | |
334 | ||
335 | attr->ia_valid |= ATTR_MODE; | |
336 | attr->ia_mode = mode; | |
337 | ||
338 | /* Special treatment for non-regular files according to the | |
339 | * gospel of sun micro | |
340 | */ | |
341 | if (type != S_IFREG) { | |
1da177e4 LT |
342 | if (type != S_IFBLK && type != S_IFCHR) { |
343 | rdev = 0; | |
344 | } else if (type == S_IFCHR && !(attr->ia_valid & ATTR_SIZE)) { | |
345 | /* If you think you've seen the worst, grok this. */ | |
346 | type = S_IFIFO; | |
347 | } else { | |
348 | /* Okay, char or block special */ | |
1da177e4 LT |
349 | if (!rdev) |
350 | rdev = wanted; | |
351 | } | |
352 | ||
353 | /* we've used the SIZE information, so discard it */ | |
354 | attr->ia_valid &= ~ATTR_SIZE; | |
355 | ||
356 | /* Make sure the type and device matches */ | |
357 | nfserr = nfserr_exist; | |
358 | if (inode && type != (inode->i_mode & S_IFMT)) | |
359 | goto out_unlock; | |
360 | } | |
361 | ||
362 | nfserr = 0; | |
363 | if (!inode) { | |
364 | /* File doesn't exist. Create it and set attrs */ | |
365 | nfserr = nfsd_create(rqstp, dirfhp, argp->name, argp->len, | |
366 | attr, type, rdev, newfhp); | |
367 | } else if (type == S_IFREG) { | |
368 | dprintk("nfsd: existing %s, valid=%x, size=%ld\n", | |
369 | argp->name, attr->ia_valid, (long) attr->ia_size); | |
370 | /* File already exists. We ignore all attributes except | |
371 | * size, so that creat() behaves exactly like | |
372 | * open(..., O_CREAT|O_TRUNC|O_WRONLY). | |
373 | */ | |
374 | attr->ia_valid &= ATTR_SIZE; | |
375 | if (attr->ia_valid) | |
376 | nfserr = nfsd_setattr(rqstp, newfhp, attr, 0, (time_t)0); | |
377 | } | |
378 | ||
379 | out_unlock: | |
380 | /* We don't really need to unlock, as fh_put does it. */ | |
381 | fh_unlock(dirfhp); | |
4a55c101 | 382 | fh_drop_write(dirfhp); |
1da177e4 LT |
383 | done: |
384 | fh_put(dirfhp); | |
846f2fcd | 385 | return nfsd_return_dirop(nfserr, resp); |
1da177e4 LT |
386 | } |
387 | ||
7111c66e | 388 | static __be32 |
1da177e4 LT |
389 | nfsd_proc_remove(struct svc_rqst *rqstp, struct nfsd_diropargs *argp, |
390 | void *resp) | |
391 | { | |
c4d987ba | 392 | __be32 nfserr; |
1da177e4 LT |
393 | |
394 | dprintk("nfsd: REMOVE %s %.*s\n", SVCFH_fmt(&argp->fh), | |
395 | argp->len, argp->name); | |
396 | ||
397 | /* Unlink. -SIFDIR means file must not be a directory */ | |
398 | nfserr = nfsd_unlink(rqstp, &argp->fh, -S_IFDIR, argp->name, argp->len); | |
399 | fh_put(&argp->fh); | |
400 | return nfserr; | |
401 | } | |
402 | ||
7111c66e | 403 | static __be32 |
1da177e4 LT |
404 | nfsd_proc_rename(struct svc_rqst *rqstp, struct nfsd_renameargs *argp, |
405 | void *resp) | |
406 | { | |
c4d987ba | 407 | __be32 nfserr; |
1da177e4 LT |
408 | |
409 | dprintk("nfsd: RENAME %s %.*s -> \n", | |
410 | SVCFH_fmt(&argp->ffh), argp->flen, argp->fname); | |
411 | dprintk("nfsd: -> %s %.*s\n", | |
412 | SVCFH_fmt(&argp->tfh), argp->tlen, argp->tname); | |
413 | ||
414 | nfserr = nfsd_rename(rqstp, &argp->ffh, argp->fname, argp->flen, | |
415 | &argp->tfh, argp->tname, argp->tlen); | |
416 | fh_put(&argp->ffh); | |
417 | fh_put(&argp->tfh); | |
418 | return nfserr; | |
419 | } | |
420 | ||
7111c66e | 421 | static __be32 |
1da177e4 LT |
422 | nfsd_proc_link(struct svc_rqst *rqstp, struct nfsd_linkargs *argp, |
423 | void *resp) | |
424 | { | |
c4d987ba | 425 | __be32 nfserr; |
1da177e4 LT |
426 | |
427 | dprintk("nfsd: LINK %s ->\n", | |
428 | SVCFH_fmt(&argp->ffh)); | |
429 | dprintk("nfsd: %s %.*s\n", | |
430 | SVCFH_fmt(&argp->tfh), | |
431 | argp->tlen, | |
432 | argp->tname); | |
433 | ||
434 | nfserr = nfsd_link(rqstp, &argp->tfh, argp->tname, argp->tlen, | |
435 | &argp->ffh); | |
436 | fh_put(&argp->ffh); | |
437 | fh_put(&argp->tfh); | |
438 | return nfserr; | |
439 | } | |
440 | ||
7111c66e | 441 | static __be32 |
1da177e4 LT |
442 | nfsd_proc_symlink(struct svc_rqst *rqstp, struct nfsd_symlinkargs *argp, |
443 | void *resp) | |
444 | { | |
445 | struct svc_fh newfh; | |
c4d987ba | 446 | __be32 nfserr; |
1da177e4 LT |
447 | |
448 | dprintk("nfsd: SYMLINK %s %.*s -> %.*s\n", | |
449 | SVCFH_fmt(&argp->ffh), argp->flen, argp->fname, | |
450 | argp->tlen, argp->tname); | |
451 | ||
452 | fh_init(&newfh, NFS_FHSIZE); | |
453 | /* | |
0aeae33f BF |
454 | * Crazy hack: the request fits in a page, and already-decoded |
455 | * attributes follow argp->tname, so it's safe to just write a | |
456 | * null to ensure it's null-terminated: | |
1da177e4 | 457 | */ |
0aeae33f | 458 | argp->tname[argp->tlen] = '\0'; |
1da177e4 | 459 | nfserr = nfsd_symlink(rqstp, &argp->ffh, argp->fname, argp->flen, |
1e444f5b | 460 | argp->tname, &newfh); |
1da177e4 LT |
461 | |
462 | fh_put(&argp->ffh); | |
463 | fh_put(&newfh); | |
464 | return nfserr; | |
465 | } | |
466 | ||
467 | /* | |
468 | * Make directory. This operation is not idempotent. | |
469 | * N.B. After this call resp->fh needs an fh_put | |
470 | */ | |
7111c66e | 471 | static __be32 |
1da177e4 LT |
472 | nfsd_proc_mkdir(struct svc_rqst *rqstp, struct nfsd_createargs *argp, |
473 | struct nfsd_diropres *resp) | |
474 | { | |
c4d987ba | 475 | __be32 nfserr; |
1da177e4 LT |
476 | |
477 | dprintk("nfsd: MKDIR %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name); | |
478 | ||
479 | if (resp->fh.fh_dentry) { | |
480 | printk(KERN_WARNING | |
481 | "nfsd_proc_mkdir: response already verified??\n"); | |
482 | } | |
483 | ||
484 | argp->attrs.ia_valid &= ~ATTR_SIZE; | |
485 | fh_init(&resp->fh, NFS_FHSIZE); | |
486 | nfserr = nfsd_create(rqstp, &argp->fh, argp->name, argp->len, | |
487 | &argp->attrs, S_IFDIR, 0, &resp->fh); | |
488 | fh_put(&argp->fh); | |
846f2fcd | 489 | return nfsd_return_dirop(nfserr, resp); |
1da177e4 LT |
490 | } |
491 | ||
492 | /* | |
493 | * Remove a directory | |
494 | */ | |
7111c66e | 495 | static __be32 |
1da177e4 LT |
496 | nfsd_proc_rmdir(struct svc_rqst *rqstp, struct nfsd_diropargs *argp, |
497 | void *resp) | |
498 | { | |
c4d987ba | 499 | __be32 nfserr; |
1da177e4 LT |
500 | |
501 | dprintk("nfsd: RMDIR %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name); | |
502 | ||
503 | nfserr = nfsd_unlink(rqstp, &argp->fh, S_IFDIR, argp->name, argp->len); | |
504 | fh_put(&argp->fh); | |
505 | return nfserr; | |
506 | } | |
507 | ||
508 | /* | |
509 | * Read a portion of a directory. | |
510 | */ | |
7111c66e | 511 | static __be32 |
1da177e4 LT |
512 | nfsd_proc_readdir(struct svc_rqst *rqstp, struct nfsd_readdirargs *argp, |
513 | struct nfsd_readdirres *resp) | |
514 | { | |
c4d987ba AV |
515 | int count; |
516 | __be32 nfserr; | |
1da177e4 LT |
517 | loff_t offset; |
518 | ||
519 | dprintk("nfsd: READDIR %s %d bytes at %d\n", | |
520 | SVCFH_fmt(&argp->fh), | |
521 | argp->count, argp->cookie); | |
522 | ||
523 | /* Shrink to the client read size */ | |
524 | count = (argp->count >> 2) - 2; | |
525 | ||
526 | /* Make sure we've room for the NULL ptr & eof flag */ | |
527 | count -= 2; | |
528 | if (count < 0) | |
529 | count = 0; | |
530 | ||
531 | resp->buffer = argp->buffer; | |
532 | resp->offset = NULL; | |
533 | resp->buflen = count; | |
534 | resp->common.err = nfs_ok; | |
535 | /* Read directory and encode entries on the fly */ | |
536 | offset = argp->cookie; | |
537 | nfserr = nfsd_readdir(rqstp, &argp->fh, &offset, | |
538 | &resp->common, nfssvc_encode_entry); | |
539 | ||
540 | resp->count = resp->buffer - argp->buffer; | |
541 | if (resp->offset) | |
542 | *resp->offset = htonl(offset); | |
543 | ||
544 | fh_put(&argp->fh); | |
545 | return nfserr; | |
546 | } | |
547 | ||
548 | /* | |
549 | * Get file system info | |
550 | */ | |
7111c66e | 551 | static __be32 |
1da177e4 LT |
552 | nfsd_proc_statfs(struct svc_rqst * rqstp, struct nfsd_fhandle *argp, |
553 | struct nfsd_statfsres *resp) | |
554 | { | |
c4d987ba | 555 | __be32 nfserr; |
1da177e4 LT |
556 | |
557 | dprintk("nfsd: STATFS %s\n", SVCFH_fmt(&argp->fh)); | |
558 | ||
04716e66 BF |
559 | nfserr = nfsd_statfs(rqstp, &argp->fh, &resp->stats, |
560 | NFSD_MAY_BYPASS_GSS_ON_ROOT); | |
1da177e4 LT |
561 | fh_put(&argp->fh); |
562 | return nfserr; | |
563 | } | |
564 | ||
565 | /* | |
566 | * NFSv2 Server procedures. | |
567 | * Only the results of non-idempotent operations are cached. | |
568 | */ | |
1da177e4 LT |
569 | struct nfsd_void { int dummy; }; |
570 | ||
1da177e4 LT |
571 | #define ST 1 /* status */ |
572 | #define FH 8 /* filehandle */ | |
573 | #define AT 18 /* attributes */ | |
574 | ||
575 | static struct svc_procedure nfsd_procedures2[18] = { | |
b9081d90 YZ |
576 | [NFSPROC_NULL] = { |
577 | .pc_func = (svc_procfunc) nfsd_proc_null, | |
578 | .pc_decode = (kxdrproc_t) nfssvc_decode_void, | |
579 | .pc_encode = (kxdrproc_t) nfssvc_encode_void, | |
580 | .pc_argsize = sizeof(struct nfsd_void), | |
581 | .pc_ressize = sizeof(struct nfsd_void), | |
582 | .pc_cachetype = RC_NOCACHE, | |
583 | .pc_xdrressize = ST, | |
584 | }, | |
585 | [NFSPROC_GETATTR] = { | |
586 | .pc_func = (svc_procfunc) nfsd_proc_getattr, | |
587 | .pc_decode = (kxdrproc_t) nfssvc_decode_fhandle, | |
588 | .pc_encode = (kxdrproc_t) nfssvc_encode_attrstat, | |
589 | .pc_release = (kxdrproc_t) nfssvc_release_fhandle, | |
590 | .pc_argsize = sizeof(struct nfsd_fhandle), | |
591 | .pc_ressize = sizeof(struct nfsd_attrstat), | |
592 | .pc_cachetype = RC_NOCACHE, | |
593 | .pc_xdrressize = ST+AT, | |
594 | }, | |
595 | [NFSPROC_SETATTR] = { | |
596 | .pc_func = (svc_procfunc) nfsd_proc_setattr, | |
597 | .pc_decode = (kxdrproc_t) nfssvc_decode_sattrargs, | |
598 | .pc_encode = (kxdrproc_t) nfssvc_encode_attrstat, | |
599 | .pc_release = (kxdrproc_t) nfssvc_release_fhandle, | |
600 | .pc_argsize = sizeof(struct nfsd_sattrargs), | |
601 | .pc_ressize = sizeof(struct nfsd_attrstat), | |
602 | .pc_cachetype = RC_REPLBUFF, | |
603 | .pc_xdrressize = ST+AT, | |
604 | }, | |
605 | [NFSPROC_ROOT] = { | |
606 | .pc_decode = (kxdrproc_t) nfssvc_decode_void, | |
607 | .pc_encode = (kxdrproc_t) nfssvc_encode_void, | |
608 | .pc_argsize = sizeof(struct nfsd_void), | |
609 | .pc_ressize = sizeof(struct nfsd_void), | |
610 | .pc_cachetype = RC_NOCACHE, | |
611 | .pc_xdrressize = ST, | |
612 | }, | |
613 | [NFSPROC_LOOKUP] = { | |
614 | .pc_func = (svc_procfunc) nfsd_proc_lookup, | |
615 | .pc_decode = (kxdrproc_t) nfssvc_decode_diropargs, | |
616 | .pc_encode = (kxdrproc_t) nfssvc_encode_diropres, | |
617 | .pc_release = (kxdrproc_t) nfssvc_release_fhandle, | |
618 | .pc_argsize = sizeof(struct nfsd_diropargs), | |
619 | .pc_ressize = sizeof(struct nfsd_diropres), | |
620 | .pc_cachetype = RC_NOCACHE, | |
621 | .pc_xdrressize = ST+FH+AT, | |
622 | }, | |
623 | [NFSPROC_READLINK] = { | |
624 | .pc_func = (svc_procfunc) nfsd_proc_readlink, | |
625 | .pc_decode = (kxdrproc_t) nfssvc_decode_readlinkargs, | |
626 | .pc_encode = (kxdrproc_t) nfssvc_encode_readlinkres, | |
627 | .pc_argsize = sizeof(struct nfsd_readlinkargs), | |
628 | .pc_ressize = sizeof(struct nfsd_readlinkres), | |
629 | .pc_cachetype = RC_NOCACHE, | |
630 | .pc_xdrressize = ST+1+NFS_MAXPATHLEN/4, | |
631 | }, | |
632 | [NFSPROC_READ] = { | |
633 | .pc_func = (svc_procfunc) nfsd_proc_read, | |
634 | .pc_decode = (kxdrproc_t) nfssvc_decode_readargs, | |
635 | .pc_encode = (kxdrproc_t) nfssvc_encode_readres, | |
636 | .pc_release = (kxdrproc_t) nfssvc_release_fhandle, | |
637 | .pc_argsize = sizeof(struct nfsd_readargs), | |
638 | .pc_ressize = sizeof(struct nfsd_readres), | |
639 | .pc_cachetype = RC_NOCACHE, | |
640 | .pc_xdrressize = ST+AT+1+NFSSVC_MAXBLKSIZE_V2/4, | |
641 | }, | |
642 | [NFSPROC_WRITECACHE] = { | |
643 | .pc_decode = (kxdrproc_t) nfssvc_decode_void, | |
644 | .pc_encode = (kxdrproc_t) nfssvc_encode_void, | |
645 | .pc_argsize = sizeof(struct nfsd_void), | |
646 | .pc_ressize = sizeof(struct nfsd_void), | |
647 | .pc_cachetype = RC_NOCACHE, | |
648 | .pc_xdrressize = ST, | |
649 | }, | |
650 | [NFSPROC_WRITE] = { | |
651 | .pc_func = (svc_procfunc) nfsd_proc_write, | |
652 | .pc_decode = (kxdrproc_t) nfssvc_decode_writeargs, | |
653 | .pc_encode = (kxdrproc_t) nfssvc_encode_attrstat, | |
654 | .pc_release = (kxdrproc_t) nfssvc_release_fhandle, | |
655 | .pc_argsize = sizeof(struct nfsd_writeargs), | |
656 | .pc_ressize = sizeof(struct nfsd_attrstat), | |
657 | .pc_cachetype = RC_REPLBUFF, | |
658 | .pc_xdrressize = ST+AT, | |
659 | }, | |
660 | [NFSPROC_CREATE] = { | |
661 | .pc_func = (svc_procfunc) nfsd_proc_create, | |
662 | .pc_decode = (kxdrproc_t) nfssvc_decode_createargs, | |
663 | .pc_encode = (kxdrproc_t) nfssvc_encode_diropres, | |
664 | .pc_release = (kxdrproc_t) nfssvc_release_fhandle, | |
665 | .pc_argsize = sizeof(struct nfsd_createargs), | |
666 | .pc_ressize = sizeof(struct nfsd_diropres), | |
667 | .pc_cachetype = RC_REPLBUFF, | |
668 | .pc_xdrressize = ST+FH+AT, | |
669 | }, | |
670 | [NFSPROC_REMOVE] = { | |
671 | .pc_func = (svc_procfunc) nfsd_proc_remove, | |
672 | .pc_decode = (kxdrproc_t) nfssvc_decode_diropargs, | |
673 | .pc_encode = (kxdrproc_t) nfssvc_encode_void, | |
674 | .pc_argsize = sizeof(struct nfsd_diropargs), | |
675 | .pc_ressize = sizeof(struct nfsd_void), | |
676 | .pc_cachetype = RC_REPLSTAT, | |
677 | .pc_xdrressize = ST, | |
678 | }, | |
679 | [NFSPROC_RENAME] = { | |
680 | .pc_func = (svc_procfunc) nfsd_proc_rename, | |
681 | .pc_decode = (kxdrproc_t) nfssvc_decode_renameargs, | |
682 | .pc_encode = (kxdrproc_t) nfssvc_encode_void, | |
683 | .pc_argsize = sizeof(struct nfsd_renameargs), | |
684 | .pc_ressize = sizeof(struct nfsd_void), | |
685 | .pc_cachetype = RC_REPLSTAT, | |
686 | .pc_xdrressize = ST, | |
687 | }, | |
688 | [NFSPROC_LINK] = { | |
689 | .pc_func = (svc_procfunc) nfsd_proc_link, | |
690 | .pc_decode = (kxdrproc_t) nfssvc_decode_linkargs, | |
691 | .pc_encode = (kxdrproc_t) nfssvc_encode_void, | |
692 | .pc_argsize = sizeof(struct nfsd_linkargs), | |
693 | .pc_ressize = sizeof(struct nfsd_void), | |
694 | .pc_cachetype = RC_REPLSTAT, | |
695 | .pc_xdrressize = ST, | |
696 | }, | |
697 | [NFSPROC_SYMLINK] = { | |
698 | .pc_func = (svc_procfunc) nfsd_proc_symlink, | |
699 | .pc_decode = (kxdrproc_t) nfssvc_decode_symlinkargs, | |
700 | .pc_encode = (kxdrproc_t) nfssvc_encode_void, | |
701 | .pc_argsize = sizeof(struct nfsd_symlinkargs), | |
702 | .pc_ressize = sizeof(struct nfsd_void), | |
703 | .pc_cachetype = RC_REPLSTAT, | |
704 | .pc_xdrressize = ST, | |
705 | }, | |
706 | [NFSPROC_MKDIR] = { | |
707 | .pc_func = (svc_procfunc) nfsd_proc_mkdir, | |
708 | .pc_decode = (kxdrproc_t) nfssvc_decode_createargs, | |
709 | .pc_encode = (kxdrproc_t) nfssvc_encode_diropres, | |
710 | .pc_release = (kxdrproc_t) nfssvc_release_fhandle, | |
711 | .pc_argsize = sizeof(struct nfsd_createargs), | |
712 | .pc_ressize = sizeof(struct nfsd_diropres), | |
713 | .pc_cachetype = RC_REPLBUFF, | |
714 | .pc_xdrressize = ST+FH+AT, | |
715 | }, | |
716 | [NFSPROC_RMDIR] = { | |
717 | .pc_func = (svc_procfunc) nfsd_proc_rmdir, | |
718 | .pc_decode = (kxdrproc_t) nfssvc_decode_diropargs, | |
719 | .pc_encode = (kxdrproc_t) nfssvc_encode_void, | |
720 | .pc_argsize = sizeof(struct nfsd_diropargs), | |
721 | .pc_ressize = sizeof(struct nfsd_void), | |
722 | .pc_cachetype = RC_REPLSTAT, | |
723 | .pc_xdrressize = ST, | |
724 | }, | |
725 | [NFSPROC_READDIR] = { | |
726 | .pc_func = (svc_procfunc) nfsd_proc_readdir, | |
727 | .pc_decode = (kxdrproc_t) nfssvc_decode_readdirargs, | |
728 | .pc_encode = (kxdrproc_t) nfssvc_encode_readdirres, | |
729 | .pc_argsize = sizeof(struct nfsd_readdirargs), | |
730 | .pc_ressize = sizeof(struct nfsd_readdirres), | |
731 | .pc_cachetype = RC_NOCACHE, | |
732 | }, | |
733 | [NFSPROC_STATFS] = { | |
734 | .pc_func = (svc_procfunc) nfsd_proc_statfs, | |
735 | .pc_decode = (kxdrproc_t) nfssvc_decode_fhandle, | |
736 | .pc_encode = (kxdrproc_t) nfssvc_encode_statfsres, | |
737 | .pc_argsize = sizeof(struct nfsd_fhandle), | |
738 | .pc_ressize = sizeof(struct nfsd_statfsres), | |
739 | .pc_cachetype = RC_NOCACHE, | |
740 | .pc_xdrressize = ST+5, | |
741 | }, | |
1da177e4 LT |
742 | }; |
743 | ||
744 | ||
745 | struct svc_version nfsd_version2 = { | |
746 | .vs_vers = 2, | |
747 | .vs_nproc = 18, | |
748 | .vs_proc = nfsd_procedures2, | |
749 | .vs_dispatch = nfsd_dispatch, | |
750 | .vs_xdrsize = NFS2_SVC_XDRSIZE, | |
751 | }; | |
752 | ||
753 | /* | |
754 | * Map errnos to NFS errnos. | |
755 | */ | |
63f10311 | 756 | __be32 |
1da177e4 LT |
757 | nfserrno (int errno) |
758 | { | |
759 | static struct { | |
63f10311 | 760 | __be32 nfserr; |
1da177e4 LT |
761 | int syserr; |
762 | } nfs_errtbl[] = { | |
763 | { nfs_ok, 0 }, | |
764 | { nfserr_perm, -EPERM }, | |
765 | { nfserr_noent, -ENOENT }, | |
766 | { nfserr_io, -EIO }, | |
767 | { nfserr_nxio, -ENXIO }, | |
62814d6a | 768 | { nfserr_fbig, -E2BIG }, |
1da177e4 LT |
769 | { nfserr_acces, -EACCES }, |
770 | { nfserr_exist, -EEXIST }, | |
771 | { nfserr_xdev, -EXDEV }, | |
772 | { nfserr_mlink, -EMLINK }, | |
773 | { nfserr_nodev, -ENODEV }, | |
774 | { nfserr_notdir, -ENOTDIR }, | |
775 | { nfserr_isdir, -EISDIR }, | |
776 | { nfserr_inval, -EINVAL }, | |
777 | { nfserr_fbig, -EFBIG }, | |
778 | { nfserr_nospc, -ENOSPC }, | |
779 | { nfserr_rofs, -EROFS }, | |
780 | { nfserr_mlink, -EMLINK }, | |
781 | { nfserr_nametoolong, -ENAMETOOLONG }, | |
782 | { nfserr_notempty, -ENOTEMPTY }, | |
783 | #ifdef EDQUOT | |
784 | { nfserr_dquot, -EDQUOT }, | |
785 | #endif | |
786 | { nfserr_stale, -ESTALE }, | |
787 | { nfserr_jukebox, -ETIMEDOUT }, | |
599eb304 | 788 | { nfserr_jukebox, -ERESTARTSYS }, |
062304a8 BF |
789 | { nfserr_jukebox, -EAGAIN }, |
790 | { nfserr_jukebox, -EWOULDBLOCK }, | |
3beb6cd1 | 791 | { nfserr_jukebox, -ENOMEM }, |
1da177e4 | 792 | { nfserr_io, -ETXTBSY }, |
a838cc49 | 793 | { nfserr_notsupp, -EOPNOTSUPP }, |
b7aeda40 | 794 | { nfserr_toosmall, -ETOOSMALL }, |
f39bde24 | 795 | { nfserr_serverfault, -ESERVERFAULT }, |
b3fbfe0e | 796 | { nfserr_serverfault, -ENFILE }, |
1da177e4 LT |
797 | }; |
798 | int i; | |
799 | ||
63f10311 | 800 | for (i = 0; i < ARRAY_SIZE(nfs_errtbl); i++) { |
1da177e4 LT |
801 | if (nfs_errtbl[i].syserr == errno) |
802 | return nfs_errtbl[i].nfserr; | |
803 | } | |
62814d6a | 804 | WARN(1, "nfsd: non-standard errno: %d\n", errno); |
1da177e4 LT |
805 | return nfserr_io; |
806 | } | |
807 |