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Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 | 2 | /* |
1da177e4 LT |
3 | * Process version 2 NFS requests. |
4 | * | |
5 | * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de> | |
6 | */ | |
7 | ||
1da177e4 | 8 | #include <linux/namei.h> |
1da177e4 | 9 | |
9a74af21 BH |
10 | #include "cache.h" |
11 | #include "xdr.h" | |
0a3adade | 12 | #include "vfs.h" |
1da177e4 LT |
13 | |
14 | typedef struct svc_rqst svc_rqst; | |
15 | typedef struct svc_buf svc_buf; | |
16 | ||
17 | #define NFSDDBG_FACILITY NFSDDBG_PROC | |
18 | ||
19 | ||
7111c66e | 20 | static __be32 |
a6beb732 | 21 | nfsd_proc_null(struct svc_rqst *rqstp) |
1da177e4 LT |
22 | { |
23 | return nfs_ok; | |
24 | } | |
25 | ||
c4d987ba AV |
26 | static __be32 |
27 | nfsd_return_attrs(__be32 err, struct nfsd_attrstat *resp) | |
846f2fcd DS |
28 | { |
29 | if (err) return err; | |
3dadecce | 30 | return fh_getattr(&resp->fh, &resp->stat); |
846f2fcd | 31 | } |
c4d987ba AV |
32 | static __be32 |
33 | nfsd_return_dirop(__be32 err, struct nfsd_diropres *resp) | |
846f2fcd DS |
34 | { |
35 | if (err) return err; | |
3dadecce | 36 | return fh_getattr(&resp->fh, &resp->stat); |
846f2fcd | 37 | } |
1da177e4 LT |
38 | /* |
39 | * Get a file's attributes | |
40 | * N.B. After this call resp->fh needs an fh_put | |
41 | */ | |
7111c66e | 42 | static __be32 |
a6beb732 | 43 | nfsd_proc_getattr(struct svc_rqst *rqstp) |
1da177e4 | 44 | { |
a6beb732 CH |
45 | struct nfsd_fhandle *argp = rqstp->rq_argp; |
46 | struct nfsd_attrstat *resp = rqstp->rq_resp; | |
c4d987ba | 47 | __be32 nfserr; |
1da177e4 LT |
48 | dprintk("nfsd: GETATTR %s\n", SVCFH_fmt(&argp->fh)); |
49 | ||
50 | fh_copy(&resp->fh, &argp->fh); | |
04716e66 BF |
51 | nfserr = fh_verify(rqstp, &resp->fh, 0, |
52 | NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT); | |
846f2fcd | 53 | return nfsd_return_attrs(nfserr, resp); |
1da177e4 LT |
54 | } |
55 | ||
56 | /* | |
57 | * Set a file's attributes | |
58 | * N.B. After this call resp->fh needs an fh_put | |
59 | */ | |
7111c66e | 60 | static __be32 |
a6beb732 | 61 | nfsd_proc_setattr(struct svc_rqst *rqstp) |
1da177e4 | 62 | { |
a6beb732 CH |
63 | struct nfsd_sattrargs *argp = rqstp->rq_argp; |
64 | struct nfsd_attrstat *resp = rqstp->rq_resp; | |
cc265089 AG |
65 | struct iattr *iap = &argp->attrs; |
66 | struct svc_fh *fhp; | |
c4d987ba | 67 | __be32 nfserr; |
cc265089 | 68 | |
1da177e4 LT |
69 | dprintk("nfsd: SETATTR %s, valid=%x, size=%ld\n", |
70 | SVCFH_fmt(&argp->fh), | |
71 | argp->attrs.ia_valid, (long) argp->attrs.ia_size); | |
72 | ||
cc265089 AG |
73 | fhp = fh_copy(&resp->fh, &argp->fh); |
74 | ||
75 | /* | |
76 | * NFSv2 does not differentiate between "set-[ac]time-to-now" | |
77 | * which only requires access, and "set-[ac]time-to-X" which | |
78 | * requires ownership. | |
79 | * So if it looks like it might be "set both to the same time which | |
31051c85 | 80 | * is close to now", and if setattr_prepare fails, then we |
cc265089 AG |
81 | * convert to "set to now" instead of "set to explicit time" |
82 | * | |
31051c85 | 83 | * We only call setattr_prepare as the last test as technically |
cc265089 AG |
84 | * it is not an interface that we should be using. |
85 | */ | |
86 | #define BOTH_TIME_SET (ATTR_ATIME_SET | ATTR_MTIME_SET) | |
87 | #define MAX_TOUCH_TIME_ERROR (30*60) | |
88 | if ((iap->ia_valid & BOTH_TIME_SET) == BOTH_TIME_SET && | |
89 | iap->ia_mtime.tv_sec == iap->ia_atime.tv_sec) { | |
90 | /* | |
91 | * Looks probable. | |
92 | * | |
93 | * Now just make sure time is in the right ballpark. | |
94 | * Solaris, at least, doesn't seem to care what the time | |
95 | * request is. We require it be within 30 minutes of now. | |
96 | */ | |
97 | time_t delta = iap->ia_atime.tv_sec - get_seconds(); | |
cc265089 AG |
98 | |
99 | nfserr = fh_verify(rqstp, fhp, 0, NFSD_MAY_NOP); | |
100 | if (nfserr) | |
101 | goto done; | |
cc265089 AG |
102 | |
103 | if (delta < 0) | |
104 | delta = -delta; | |
105 | if (delta < MAX_TOUCH_TIME_ERROR && | |
31051c85 | 106 | setattr_prepare(fhp->fh_dentry, iap) != 0) { |
cc265089 AG |
107 | /* |
108 | * Turn off ATTR_[AM]TIME_SET but leave ATTR_[AM]TIME. | |
109 | * This will cause notify_change to set these times | |
110 | * to "now" | |
111 | */ | |
112 | iap->ia_valid &= ~BOTH_TIME_SET; | |
113 | } | |
114 | } | |
115 | ||
116 | nfserr = nfsd_setattr(rqstp, fhp, iap, 0, (time_t)0); | |
117 | done: | |
846f2fcd | 118 | return nfsd_return_attrs(nfserr, resp); |
1da177e4 LT |
119 | } |
120 | ||
121 | /* | |
122 | * Look up a path name component | |
123 | * Note: the dentry in the resp->fh may be negative if the file | |
124 | * doesn't exist yet. | |
125 | * N.B. After this call resp->fh needs an fh_put | |
126 | */ | |
7111c66e | 127 | static __be32 |
a6beb732 | 128 | nfsd_proc_lookup(struct svc_rqst *rqstp) |
1da177e4 | 129 | { |
a6beb732 CH |
130 | struct nfsd_diropargs *argp = rqstp->rq_argp; |
131 | struct nfsd_diropres *resp = rqstp->rq_resp; | |
c4d987ba | 132 | __be32 nfserr; |
1da177e4 LT |
133 | |
134 | dprintk("nfsd: LOOKUP %s %.*s\n", | |
135 | SVCFH_fmt(&argp->fh), argp->len, argp->name); | |
136 | ||
137 | fh_init(&resp->fh, NFS_FHSIZE); | |
138 | nfserr = nfsd_lookup(rqstp, &argp->fh, argp->name, argp->len, | |
139 | &resp->fh); | |
140 | ||
141 | fh_put(&argp->fh); | |
846f2fcd | 142 | return nfsd_return_dirop(nfserr, resp); |
1da177e4 LT |
143 | } |
144 | ||
145 | /* | |
146 | * Read a symlink. | |
147 | */ | |
7111c66e | 148 | static __be32 |
a6beb732 | 149 | nfsd_proc_readlink(struct svc_rqst *rqstp) |
1da177e4 | 150 | { |
a6beb732 CH |
151 | struct nfsd_readlinkargs *argp = rqstp->rq_argp; |
152 | struct nfsd_readlinkres *resp = rqstp->rq_resp; | |
c4d987ba | 153 | __be32 nfserr; |
1da177e4 LT |
154 | |
155 | dprintk("nfsd: READLINK %s\n", SVCFH_fmt(&argp->fh)); | |
156 | ||
157 | /* Read the symlink. */ | |
158 | resp->len = NFS_MAXPATHLEN; | |
159 | nfserr = nfsd_readlink(rqstp, &argp->fh, argp->buffer, &resp->len); | |
160 | ||
161 | fh_put(&argp->fh); | |
162 | return nfserr; | |
163 | } | |
164 | ||
165 | /* | |
166 | * Read a portion of a file. | |
167 | * N.B. After this call resp->fh needs an fh_put | |
168 | */ | |
7111c66e | 169 | static __be32 |
a6beb732 | 170 | nfsd_proc_read(struct svc_rqst *rqstp) |
1da177e4 | 171 | { |
a6beb732 CH |
172 | struct nfsd_readargs *argp = rqstp->rq_argp; |
173 | struct nfsd_readres *resp = rqstp->rq_resp; | |
c4d987ba | 174 | __be32 nfserr; |
1da177e4 LT |
175 | |
176 | dprintk("nfsd: READ %s %d bytes at %d\n", | |
177 | SVCFH_fmt(&argp->fh), | |
178 | argp->count, argp->offset); | |
179 | ||
180 | /* Obtain buffer pointer for payload. 19 is 1 word for | |
181 | * status, 17 words for fattr, and 1 word for the byte count. | |
182 | */ | |
183 | ||
7adae489 | 184 | if (NFSSVC_MAXBLKSIZE_V2 < argp->count) { |
ad06e4bd | 185 | char buf[RPC_MAX_ADDRBUFLEN]; |
1da177e4 | 186 | printk(KERN_NOTICE |
ad06e4bd CL |
187 | "oversized read request from %s (%d bytes)\n", |
188 | svc_print_addr(rqstp, buf, sizeof(buf)), | |
1da177e4 | 189 | argp->count); |
7adae489 | 190 | argp->count = NFSSVC_MAXBLKSIZE_V2; |
1da177e4 | 191 | } |
cd123012 | 192 | svc_reserve_auth(rqstp, (19<<2) + argp->count + 4); |
1da177e4 LT |
193 | |
194 | resp->count = argp->count; | |
039a87ca | 195 | nfserr = nfsd_read(rqstp, fh_copy(&resp->fh, &argp->fh), |
1da177e4 | 196 | argp->offset, |
3cc03b16 | 197 | rqstp->rq_vec, argp->vlen, |
1da177e4 LT |
198 | &resp->count); |
199 | ||
846f2fcd | 200 | if (nfserr) return nfserr; |
3dadecce | 201 | return fh_getattr(&resp->fh, &resp->stat); |
1da177e4 LT |
202 | } |
203 | ||
204 | /* | |
205 | * Write data to a file | |
206 | * N.B. After this call resp->fh needs an fh_put | |
207 | */ | |
7111c66e | 208 | static __be32 |
a6beb732 | 209 | nfsd_proc_write(struct svc_rqst *rqstp) |
1da177e4 | 210 | { |
a6beb732 CH |
211 | struct nfsd_writeargs *argp = rqstp->rq_argp; |
212 | struct nfsd_attrstat *resp = rqstp->rq_resp; | |
c4d987ba | 213 | __be32 nfserr; |
31dec253 | 214 | unsigned long cnt = argp->len; |
1da177e4 LT |
215 | |
216 | dprintk("nfsd: WRITE %s %d bytes at %d\n", | |
217 | SVCFH_fmt(&argp->fh), | |
218 | argp->len, argp->offset); | |
219 | ||
52e380e0 KM |
220 | nfserr = nfsd_write(rqstp, fh_copy(&resp->fh, &argp->fh), argp->offset, |
221 | rqstp->rq_vec, argp->vlen, &cnt, NFS_DATA_SYNC); | |
846f2fcd | 222 | return nfsd_return_attrs(nfserr, resp); |
1da177e4 LT |
223 | } |
224 | ||
225 | /* | |
226 | * CREATE processing is complicated. The keyword here is `overloaded.' | |
227 | * The parent directory is kept locked between the check for existence | |
228 | * and the actual create() call in compliance with VFS protocols. | |
229 | * N.B. After this call _both_ argp->fh and resp->fh need an fh_put | |
230 | */ | |
7111c66e | 231 | static __be32 |
a6beb732 | 232 | nfsd_proc_create(struct svc_rqst *rqstp) |
1da177e4 | 233 | { |
a6beb732 CH |
234 | struct nfsd_createargs *argp = rqstp->rq_argp; |
235 | struct nfsd_diropres *resp = rqstp->rq_resp; | |
1da177e4 LT |
236 | svc_fh *dirfhp = &argp->fh; |
237 | svc_fh *newfhp = &resp->fh; | |
238 | struct iattr *attr = &argp->attrs; | |
239 | struct inode *inode; | |
240 | struct dentry *dchild; | |
c4d987ba AV |
241 | int type, mode; |
242 | __be32 nfserr; | |
4a55c101 | 243 | int hosterr; |
1da177e4 LT |
244 | dev_t rdev = 0, wanted = new_decode_dev(attr->ia_size); |
245 | ||
246 | dprintk("nfsd: CREATE %s %.*s\n", | |
247 | SVCFH_fmt(dirfhp), argp->len, argp->name); | |
248 | ||
249 | /* First verify the parent file handle */ | |
8837abca | 250 | nfserr = fh_verify(rqstp, dirfhp, S_IFDIR, NFSD_MAY_EXEC); |
1da177e4 LT |
251 | if (nfserr) |
252 | goto done; /* must fh_put dirfhp even on error */ | |
253 | ||
8837abca | 254 | /* Check for NFSD_MAY_WRITE in nfsd_create if necessary */ |
1da177e4 | 255 | |
1da177e4 LT |
256 | nfserr = nfserr_exist; |
257 | if (isdotent(argp->name, argp->len)) | |
258 | goto done; | |
4a55c101 JK |
259 | hosterr = fh_want_write(dirfhp); |
260 | if (hosterr) { | |
261 | nfserr = nfserrno(hosterr); | |
262 | goto done; | |
263 | } | |
264 | ||
7ed94296 | 265 | fh_lock_nested(dirfhp, I_MUTEX_PARENT); |
1da177e4 LT |
266 | dchild = lookup_one_len(argp->name, dirfhp->fh_dentry, argp->len); |
267 | if (IS_ERR(dchild)) { | |
268 | nfserr = nfserrno(PTR_ERR(dchild)); | |
269 | goto out_unlock; | |
270 | } | |
271 | fh_init(newfhp, NFS_FHSIZE); | |
272 | nfserr = fh_compose(newfhp, dirfhp->fh_export, dchild, dirfhp); | |
2b0143b5 | 273 | if (!nfserr && d_really_is_negative(dchild)) |
1da177e4 LT |
274 | nfserr = nfserr_noent; |
275 | dput(dchild); | |
276 | if (nfserr) { | |
277 | if (nfserr != nfserr_noent) | |
278 | goto out_unlock; | |
279 | /* | |
280 | * If the new file handle wasn't verified, we can't tell | |
281 | * whether the file exists or not. Time to bail ... | |
282 | */ | |
283 | nfserr = nfserr_acces; | |
284 | if (!newfhp->fh_dentry) { | |
285 | printk(KERN_WARNING | |
286 | "nfsd_proc_create: file handle not verified\n"); | |
287 | goto out_unlock; | |
288 | } | |
289 | } | |
290 | ||
2b0143b5 | 291 | inode = d_inode(newfhp->fh_dentry); |
1da177e4 LT |
292 | |
293 | /* Unfudge the mode bits */ | |
294 | if (attr->ia_valid & ATTR_MODE) { | |
295 | type = attr->ia_mode & S_IFMT; | |
296 | mode = attr->ia_mode & ~S_IFMT; | |
297 | if (!type) { | |
298 | /* no type, so if target exists, assume same as that, | |
299 | * else assume a file */ | |
300 | if (inode) { | |
301 | type = inode->i_mode & S_IFMT; | |
302 | switch(type) { | |
303 | case S_IFCHR: | |
304 | case S_IFBLK: | |
305 | /* reserve rdev for later checking */ | |
306 | rdev = inode->i_rdev; | |
307 | attr->ia_valid |= ATTR_SIZE; | |
308 | ||
309 | /* FALLTHROUGH */ | |
310 | case S_IFIFO: | |
311 | /* this is probably a permission check.. | |
312 | * at least IRIX implements perm checking on | |
313 | * echo thing > device-special-file-or-pipe | |
314 | * by doing a CREATE with type==0 | |
315 | */ | |
0ec757df BF |
316 | nfserr = nfsd_permission(rqstp, |
317 | newfhp->fh_export, | |
1da177e4 | 318 | newfhp->fh_dentry, |
8837abca | 319 | NFSD_MAY_WRITE|NFSD_MAY_LOCAL_ACCESS); |
1da177e4 LT |
320 | if (nfserr && nfserr != nfserr_rofs) |
321 | goto out_unlock; | |
322 | } | |
323 | } else | |
324 | type = S_IFREG; | |
325 | } | |
326 | } else if (inode) { | |
327 | type = inode->i_mode & S_IFMT; | |
328 | mode = inode->i_mode & ~S_IFMT; | |
329 | } else { | |
330 | type = S_IFREG; | |
331 | mode = 0; /* ??? */ | |
332 | } | |
333 | ||
334 | attr->ia_valid |= ATTR_MODE; | |
335 | attr->ia_mode = mode; | |
336 | ||
337 | /* Special treatment for non-regular files according to the | |
338 | * gospel of sun micro | |
339 | */ | |
340 | if (type != S_IFREG) { | |
1da177e4 LT |
341 | if (type != S_IFBLK && type != S_IFCHR) { |
342 | rdev = 0; | |
343 | } else if (type == S_IFCHR && !(attr->ia_valid & ATTR_SIZE)) { | |
344 | /* If you think you've seen the worst, grok this. */ | |
345 | type = S_IFIFO; | |
346 | } else { | |
347 | /* Okay, char or block special */ | |
1da177e4 LT |
348 | if (!rdev) |
349 | rdev = wanted; | |
350 | } | |
351 | ||
352 | /* we've used the SIZE information, so discard it */ | |
353 | attr->ia_valid &= ~ATTR_SIZE; | |
354 | ||
355 | /* Make sure the type and device matches */ | |
356 | nfserr = nfserr_exist; | |
357 | if (inode && type != (inode->i_mode & S_IFMT)) | |
358 | goto out_unlock; | |
359 | } | |
360 | ||
361 | nfserr = 0; | |
362 | if (!inode) { | |
363 | /* File doesn't exist. Create it and set attrs */ | |
b44061d0 BF |
364 | nfserr = nfsd_create_locked(rqstp, dirfhp, argp->name, |
365 | argp->len, attr, type, rdev, newfhp); | |
1da177e4 LT |
366 | } else if (type == S_IFREG) { |
367 | dprintk("nfsd: existing %s, valid=%x, size=%ld\n", | |
368 | argp->name, attr->ia_valid, (long) attr->ia_size); | |
369 | /* File already exists. We ignore all attributes except | |
370 | * size, so that creat() behaves exactly like | |
371 | * open(..., O_CREAT|O_TRUNC|O_WRONLY). | |
372 | */ | |
373 | attr->ia_valid &= ATTR_SIZE; | |
374 | if (attr->ia_valid) | |
375 | nfserr = nfsd_setattr(rqstp, newfhp, attr, 0, (time_t)0); | |
376 | } | |
377 | ||
378 | out_unlock: | |
379 | /* We don't really need to unlock, as fh_put does it. */ | |
380 | fh_unlock(dirfhp); | |
4a55c101 | 381 | fh_drop_write(dirfhp); |
1da177e4 LT |
382 | done: |
383 | fh_put(dirfhp); | |
846f2fcd | 384 | return nfsd_return_dirop(nfserr, resp); |
1da177e4 LT |
385 | } |
386 | ||
7111c66e | 387 | static __be32 |
a6beb732 | 388 | nfsd_proc_remove(struct svc_rqst *rqstp) |
1da177e4 | 389 | { |
a6beb732 | 390 | struct nfsd_diropargs *argp = rqstp->rq_argp; |
c4d987ba | 391 | __be32 nfserr; |
1da177e4 LT |
392 | |
393 | dprintk("nfsd: REMOVE %s %.*s\n", SVCFH_fmt(&argp->fh), | |
394 | argp->len, argp->name); | |
395 | ||
396 | /* Unlink. -SIFDIR means file must not be a directory */ | |
397 | nfserr = nfsd_unlink(rqstp, &argp->fh, -S_IFDIR, argp->name, argp->len); | |
398 | fh_put(&argp->fh); | |
399 | return nfserr; | |
400 | } | |
401 | ||
7111c66e | 402 | static __be32 |
a6beb732 | 403 | nfsd_proc_rename(struct svc_rqst *rqstp) |
1da177e4 | 404 | { |
a6beb732 | 405 | struct nfsd_renameargs *argp = rqstp->rq_argp; |
c4d987ba | 406 | __be32 nfserr; |
1da177e4 LT |
407 | |
408 | dprintk("nfsd: RENAME %s %.*s -> \n", | |
409 | SVCFH_fmt(&argp->ffh), argp->flen, argp->fname); | |
410 | dprintk("nfsd: -> %s %.*s\n", | |
411 | SVCFH_fmt(&argp->tfh), argp->tlen, argp->tname); | |
412 | ||
413 | nfserr = nfsd_rename(rqstp, &argp->ffh, argp->fname, argp->flen, | |
414 | &argp->tfh, argp->tname, argp->tlen); | |
415 | fh_put(&argp->ffh); | |
416 | fh_put(&argp->tfh); | |
417 | return nfserr; | |
418 | } | |
419 | ||
7111c66e | 420 | static __be32 |
a6beb732 | 421 | nfsd_proc_link(struct svc_rqst *rqstp) |
1da177e4 | 422 | { |
a6beb732 | 423 | struct nfsd_linkargs *argp = rqstp->rq_argp; |
c4d987ba | 424 | __be32 nfserr; |
1da177e4 LT |
425 | |
426 | dprintk("nfsd: LINK %s ->\n", | |
427 | SVCFH_fmt(&argp->ffh)); | |
428 | dprintk("nfsd: %s %.*s\n", | |
429 | SVCFH_fmt(&argp->tfh), | |
430 | argp->tlen, | |
431 | argp->tname); | |
432 | ||
433 | nfserr = nfsd_link(rqstp, &argp->tfh, argp->tname, argp->tlen, | |
434 | &argp->ffh); | |
435 | fh_put(&argp->ffh); | |
436 | fh_put(&argp->tfh); | |
437 | return nfserr; | |
438 | } | |
439 | ||
7111c66e | 440 | static __be32 |
a6beb732 | 441 | nfsd_proc_symlink(struct svc_rqst *rqstp) |
1da177e4 | 442 | { |
a6beb732 | 443 | struct nfsd_symlinkargs *argp = rqstp->rq_argp; |
1da177e4 | 444 | struct svc_fh newfh; |
c4d987ba | 445 | __be32 nfserr; |
1da177e4 LT |
446 | |
447 | dprintk("nfsd: SYMLINK %s %.*s -> %.*s\n", | |
448 | SVCFH_fmt(&argp->ffh), argp->flen, argp->fname, | |
449 | argp->tlen, argp->tname); | |
450 | ||
451 | fh_init(&newfh, NFS_FHSIZE); | |
452 | /* | |
0aeae33f BF |
453 | * Crazy hack: the request fits in a page, and already-decoded |
454 | * attributes follow argp->tname, so it's safe to just write a | |
455 | * null to ensure it's null-terminated: | |
1da177e4 | 456 | */ |
0aeae33f | 457 | argp->tname[argp->tlen] = '\0'; |
1da177e4 | 458 | nfserr = nfsd_symlink(rqstp, &argp->ffh, argp->fname, argp->flen, |
1e444f5b | 459 | argp->tname, &newfh); |
1da177e4 LT |
460 | |
461 | fh_put(&argp->ffh); | |
462 | fh_put(&newfh); | |
463 | return nfserr; | |
464 | } | |
465 | ||
466 | /* | |
467 | * Make directory. This operation is not idempotent. | |
468 | * N.B. After this call resp->fh needs an fh_put | |
469 | */ | |
7111c66e | 470 | static __be32 |
a6beb732 | 471 | nfsd_proc_mkdir(struct svc_rqst *rqstp) |
1da177e4 | 472 | { |
a6beb732 CH |
473 | struct nfsd_createargs *argp = rqstp->rq_argp; |
474 | struct nfsd_diropres *resp = rqstp->rq_resp; | |
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 |
a6beb732 | 496 | nfsd_proc_rmdir(struct svc_rqst *rqstp) |
1da177e4 | 497 | { |
a6beb732 | 498 | struct nfsd_diropargs *argp = rqstp->rq_argp; |
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 |
a6beb732 | 512 | nfsd_proc_readdir(struct svc_rqst *rqstp) |
1da177e4 | 513 | { |
a6beb732 CH |
514 | struct nfsd_readdirargs *argp = rqstp->rq_argp; |
515 | struct nfsd_readdirres *resp = rqstp->rq_resp; | |
c4d987ba AV |
516 | int count; |
517 | __be32 nfserr; | |
1da177e4 LT |
518 | loff_t offset; |
519 | ||
520 | dprintk("nfsd: READDIR %s %d bytes at %d\n", | |
521 | SVCFH_fmt(&argp->fh), | |
522 | argp->count, argp->cookie); | |
523 | ||
524 | /* Shrink to the client read size */ | |
525 | count = (argp->count >> 2) - 2; | |
526 | ||
527 | /* Make sure we've room for the NULL ptr & eof flag */ | |
528 | count -= 2; | |
529 | if (count < 0) | |
530 | count = 0; | |
531 | ||
532 | resp->buffer = argp->buffer; | |
533 | resp->offset = NULL; | |
534 | resp->buflen = count; | |
535 | resp->common.err = nfs_ok; | |
536 | /* Read directory and encode entries on the fly */ | |
537 | offset = argp->cookie; | |
538 | nfserr = nfsd_readdir(rqstp, &argp->fh, &offset, | |
539 | &resp->common, nfssvc_encode_entry); | |
540 | ||
541 | resp->count = resp->buffer - argp->buffer; | |
542 | if (resp->offset) | |
543 | *resp->offset = htonl(offset); | |
544 | ||
545 | fh_put(&argp->fh); | |
546 | return nfserr; | |
547 | } | |
548 | ||
549 | /* | |
550 | * Get file system info | |
551 | */ | |
7111c66e | 552 | static __be32 |
a6beb732 | 553 | nfsd_proc_statfs(struct svc_rqst *rqstp) |
1da177e4 | 554 | { |
a6beb732 CH |
555 | struct nfsd_fhandle *argp = rqstp->rq_argp; |
556 | struct nfsd_statfsres *resp = rqstp->rq_resp; | |
c4d987ba | 557 | __be32 nfserr; |
1da177e4 LT |
558 | |
559 | dprintk("nfsd: STATFS %s\n", SVCFH_fmt(&argp->fh)); | |
560 | ||
04716e66 BF |
561 | nfserr = nfsd_statfs(rqstp, &argp->fh, &resp->stats, |
562 | NFSD_MAY_BYPASS_GSS_ON_ROOT); | |
1da177e4 LT |
563 | fh_put(&argp->fh); |
564 | return nfserr; | |
565 | } | |
566 | ||
567 | /* | |
568 | * NFSv2 Server procedures. | |
569 | * Only the results of non-idempotent operations are cached. | |
570 | */ | |
1da177e4 LT |
571 | struct nfsd_void { int dummy; }; |
572 | ||
1da177e4 LT |
573 | #define ST 1 /* status */ |
574 | #define FH 8 /* filehandle */ | |
575 | #define AT 18 /* attributes */ | |
576 | ||
860bda29 | 577 | static const struct svc_procedure nfsd_procedures2[18] = { |
b9081d90 | 578 | [NFSPROC_NULL] = { |
a6beb732 | 579 | .pc_func = nfsd_proc_null, |
026fec7e | 580 | .pc_decode = nfssvc_decode_void, |
63f8de37 | 581 | .pc_encode = nfssvc_encode_void, |
b9081d90 YZ |
582 | .pc_argsize = sizeof(struct nfsd_void), |
583 | .pc_ressize = sizeof(struct nfsd_void), | |
584 | .pc_cachetype = RC_NOCACHE, | |
585 | .pc_xdrressize = ST, | |
586 | }, | |
587 | [NFSPROC_GETATTR] = { | |
a6beb732 | 588 | .pc_func = nfsd_proc_getattr, |
026fec7e | 589 | .pc_decode = nfssvc_decode_fhandle, |
63f8de37 | 590 | .pc_encode = nfssvc_encode_attrstat, |
8537488b | 591 | .pc_release = nfssvc_release_fhandle, |
b9081d90 YZ |
592 | .pc_argsize = sizeof(struct nfsd_fhandle), |
593 | .pc_ressize = sizeof(struct nfsd_attrstat), | |
594 | .pc_cachetype = RC_NOCACHE, | |
595 | .pc_xdrressize = ST+AT, | |
596 | }, | |
597 | [NFSPROC_SETATTR] = { | |
a6beb732 | 598 | .pc_func = nfsd_proc_setattr, |
026fec7e | 599 | .pc_decode = nfssvc_decode_sattrargs, |
63f8de37 | 600 | .pc_encode = nfssvc_encode_attrstat, |
8537488b | 601 | .pc_release = nfssvc_release_fhandle, |
b9081d90 YZ |
602 | .pc_argsize = sizeof(struct nfsd_sattrargs), |
603 | .pc_ressize = sizeof(struct nfsd_attrstat), | |
604 | .pc_cachetype = RC_REPLBUFF, | |
605 | .pc_xdrressize = ST+AT, | |
606 | }, | |
607 | [NFSPROC_ROOT] = { | |
026fec7e | 608 | .pc_decode = nfssvc_decode_void, |
63f8de37 | 609 | .pc_encode = nfssvc_encode_void, |
b9081d90 YZ |
610 | .pc_argsize = sizeof(struct nfsd_void), |
611 | .pc_ressize = sizeof(struct nfsd_void), | |
612 | .pc_cachetype = RC_NOCACHE, | |
613 | .pc_xdrressize = ST, | |
614 | }, | |
615 | [NFSPROC_LOOKUP] = { | |
a6beb732 | 616 | .pc_func = nfsd_proc_lookup, |
026fec7e | 617 | .pc_decode = nfssvc_decode_diropargs, |
63f8de37 | 618 | .pc_encode = nfssvc_encode_diropres, |
8537488b | 619 | .pc_release = nfssvc_release_fhandle, |
b9081d90 YZ |
620 | .pc_argsize = sizeof(struct nfsd_diropargs), |
621 | .pc_ressize = sizeof(struct nfsd_diropres), | |
622 | .pc_cachetype = RC_NOCACHE, | |
623 | .pc_xdrressize = ST+FH+AT, | |
624 | }, | |
625 | [NFSPROC_READLINK] = { | |
a6beb732 | 626 | .pc_func = nfsd_proc_readlink, |
026fec7e | 627 | .pc_decode = nfssvc_decode_readlinkargs, |
63f8de37 | 628 | .pc_encode = nfssvc_encode_readlinkres, |
b9081d90 YZ |
629 | .pc_argsize = sizeof(struct nfsd_readlinkargs), |
630 | .pc_ressize = sizeof(struct nfsd_readlinkres), | |
631 | .pc_cachetype = RC_NOCACHE, | |
632 | .pc_xdrressize = ST+1+NFS_MAXPATHLEN/4, | |
633 | }, | |
634 | [NFSPROC_READ] = { | |
a6beb732 | 635 | .pc_func = nfsd_proc_read, |
026fec7e | 636 | .pc_decode = nfssvc_decode_readargs, |
63f8de37 | 637 | .pc_encode = nfssvc_encode_readres, |
8537488b | 638 | .pc_release = nfssvc_release_fhandle, |
b9081d90 YZ |
639 | .pc_argsize = sizeof(struct nfsd_readargs), |
640 | .pc_ressize = sizeof(struct nfsd_readres), | |
641 | .pc_cachetype = RC_NOCACHE, | |
642 | .pc_xdrressize = ST+AT+1+NFSSVC_MAXBLKSIZE_V2/4, | |
643 | }, | |
644 | [NFSPROC_WRITECACHE] = { | |
026fec7e | 645 | .pc_decode = nfssvc_decode_void, |
63f8de37 | 646 | .pc_encode = nfssvc_encode_void, |
b9081d90 YZ |
647 | .pc_argsize = sizeof(struct nfsd_void), |
648 | .pc_ressize = sizeof(struct nfsd_void), | |
649 | .pc_cachetype = RC_NOCACHE, | |
650 | .pc_xdrressize = ST, | |
651 | }, | |
652 | [NFSPROC_WRITE] = { | |
a6beb732 | 653 | .pc_func = nfsd_proc_write, |
026fec7e | 654 | .pc_decode = nfssvc_decode_writeargs, |
63f8de37 | 655 | .pc_encode = nfssvc_encode_attrstat, |
8537488b | 656 | .pc_release = nfssvc_release_fhandle, |
b9081d90 YZ |
657 | .pc_argsize = sizeof(struct nfsd_writeargs), |
658 | .pc_ressize = sizeof(struct nfsd_attrstat), | |
659 | .pc_cachetype = RC_REPLBUFF, | |
660 | .pc_xdrressize = ST+AT, | |
661 | }, | |
662 | [NFSPROC_CREATE] = { | |
a6beb732 | 663 | .pc_func = nfsd_proc_create, |
026fec7e | 664 | .pc_decode = nfssvc_decode_createargs, |
63f8de37 | 665 | .pc_encode = nfssvc_encode_diropres, |
8537488b | 666 | .pc_release = nfssvc_release_fhandle, |
b9081d90 YZ |
667 | .pc_argsize = sizeof(struct nfsd_createargs), |
668 | .pc_ressize = sizeof(struct nfsd_diropres), | |
669 | .pc_cachetype = RC_REPLBUFF, | |
670 | .pc_xdrressize = ST+FH+AT, | |
671 | }, | |
672 | [NFSPROC_REMOVE] = { | |
a6beb732 | 673 | .pc_func = nfsd_proc_remove, |
026fec7e | 674 | .pc_decode = nfssvc_decode_diropargs, |
63f8de37 | 675 | .pc_encode = nfssvc_encode_void, |
b9081d90 YZ |
676 | .pc_argsize = sizeof(struct nfsd_diropargs), |
677 | .pc_ressize = sizeof(struct nfsd_void), | |
678 | .pc_cachetype = RC_REPLSTAT, | |
679 | .pc_xdrressize = ST, | |
680 | }, | |
681 | [NFSPROC_RENAME] = { | |
a6beb732 | 682 | .pc_func = nfsd_proc_rename, |
026fec7e | 683 | .pc_decode = nfssvc_decode_renameargs, |
63f8de37 | 684 | .pc_encode = nfssvc_encode_void, |
b9081d90 YZ |
685 | .pc_argsize = sizeof(struct nfsd_renameargs), |
686 | .pc_ressize = sizeof(struct nfsd_void), | |
687 | .pc_cachetype = RC_REPLSTAT, | |
688 | .pc_xdrressize = ST, | |
689 | }, | |
690 | [NFSPROC_LINK] = { | |
a6beb732 | 691 | .pc_func = nfsd_proc_link, |
026fec7e | 692 | .pc_decode = nfssvc_decode_linkargs, |
63f8de37 | 693 | .pc_encode = nfssvc_encode_void, |
b9081d90 YZ |
694 | .pc_argsize = sizeof(struct nfsd_linkargs), |
695 | .pc_ressize = sizeof(struct nfsd_void), | |
696 | .pc_cachetype = RC_REPLSTAT, | |
697 | .pc_xdrressize = ST, | |
698 | }, | |
699 | [NFSPROC_SYMLINK] = { | |
a6beb732 | 700 | .pc_func = nfsd_proc_symlink, |
026fec7e | 701 | .pc_decode = nfssvc_decode_symlinkargs, |
63f8de37 | 702 | .pc_encode = nfssvc_encode_void, |
b9081d90 YZ |
703 | .pc_argsize = sizeof(struct nfsd_symlinkargs), |
704 | .pc_ressize = sizeof(struct nfsd_void), | |
705 | .pc_cachetype = RC_REPLSTAT, | |
706 | .pc_xdrressize = ST, | |
707 | }, | |
708 | [NFSPROC_MKDIR] = { | |
a6beb732 | 709 | .pc_func = nfsd_proc_mkdir, |
026fec7e | 710 | .pc_decode = nfssvc_decode_createargs, |
63f8de37 | 711 | .pc_encode = nfssvc_encode_diropres, |
8537488b | 712 | .pc_release = nfssvc_release_fhandle, |
b9081d90 YZ |
713 | .pc_argsize = sizeof(struct nfsd_createargs), |
714 | .pc_ressize = sizeof(struct nfsd_diropres), | |
715 | .pc_cachetype = RC_REPLBUFF, | |
716 | .pc_xdrressize = ST+FH+AT, | |
717 | }, | |
718 | [NFSPROC_RMDIR] = { | |
a6beb732 | 719 | .pc_func = nfsd_proc_rmdir, |
026fec7e | 720 | .pc_decode = nfssvc_decode_diropargs, |
63f8de37 | 721 | .pc_encode = nfssvc_encode_void, |
b9081d90 YZ |
722 | .pc_argsize = sizeof(struct nfsd_diropargs), |
723 | .pc_ressize = sizeof(struct nfsd_void), | |
724 | .pc_cachetype = RC_REPLSTAT, | |
725 | .pc_xdrressize = ST, | |
726 | }, | |
727 | [NFSPROC_READDIR] = { | |
a6beb732 | 728 | .pc_func = nfsd_proc_readdir, |
026fec7e | 729 | .pc_decode = nfssvc_decode_readdirargs, |
63f8de37 | 730 | .pc_encode = nfssvc_encode_readdirres, |
b9081d90 YZ |
731 | .pc_argsize = sizeof(struct nfsd_readdirargs), |
732 | .pc_ressize = sizeof(struct nfsd_readdirres), | |
733 | .pc_cachetype = RC_NOCACHE, | |
734 | }, | |
735 | [NFSPROC_STATFS] = { | |
a6beb732 | 736 | .pc_func = nfsd_proc_statfs, |
026fec7e | 737 | .pc_decode = nfssvc_decode_fhandle, |
63f8de37 | 738 | .pc_encode = nfssvc_encode_statfsres, |
b9081d90 YZ |
739 | .pc_argsize = sizeof(struct nfsd_fhandle), |
740 | .pc_ressize = sizeof(struct nfsd_statfsres), | |
741 | .pc_cachetype = RC_NOCACHE, | |
742 | .pc_xdrressize = ST+5, | |
743 | }, | |
1da177e4 LT |
744 | }; |
745 | ||
746 | ||
7fd38af9 | 747 | static unsigned int nfsd_count2[ARRAY_SIZE(nfsd_procedures2)]; |
e9679189 CH |
748 | const struct svc_version nfsd_version2 = { |
749 | .vs_vers = 2, | |
750 | .vs_nproc = 18, | |
751 | .vs_proc = nfsd_procedures2, | |
752 | .vs_count = nfsd_count2, | |
753 | .vs_dispatch = nfsd_dispatch, | |
754 | .vs_xdrsize = NFS2_SVC_XDRSIZE, | |
1da177e4 LT |
755 | }; |
756 | ||
757 | /* | |
758 | * Map errnos to NFS errnos. | |
759 | */ | |
63f10311 | 760 | __be32 |
1da177e4 LT |
761 | nfserrno (int errno) |
762 | { | |
763 | static struct { | |
63f10311 | 764 | __be32 nfserr; |
1da177e4 LT |
765 | int syserr; |
766 | } nfs_errtbl[] = { | |
767 | { nfs_ok, 0 }, | |
768 | { nfserr_perm, -EPERM }, | |
769 | { nfserr_noent, -ENOENT }, | |
770 | { nfserr_io, -EIO }, | |
771 | { nfserr_nxio, -ENXIO }, | |
62814d6a | 772 | { nfserr_fbig, -E2BIG }, |
1da177e4 LT |
773 | { nfserr_acces, -EACCES }, |
774 | { nfserr_exist, -EEXIST }, | |
775 | { nfserr_xdev, -EXDEV }, | |
776 | { nfserr_mlink, -EMLINK }, | |
777 | { nfserr_nodev, -ENODEV }, | |
778 | { nfserr_notdir, -ENOTDIR }, | |
779 | { nfserr_isdir, -EISDIR }, | |
780 | { nfserr_inval, -EINVAL }, | |
781 | { nfserr_fbig, -EFBIG }, | |
782 | { nfserr_nospc, -ENOSPC }, | |
783 | { nfserr_rofs, -EROFS }, | |
784 | { nfserr_mlink, -EMLINK }, | |
785 | { nfserr_nametoolong, -ENAMETOOLONG }, | |
786 | { nfserr_notempty, -ENOTEMPTY }, | |
787 | #ifdef EDQUOT | |
788 | { nfserr_dquot, -EDQUOT }, | |
789 | #endif | |
790 | { nfserr_stale, -ESTALE }, | |
791 | { nfserr_jukebox, -ETIMEDOUT }, | |
599eb304 | 792 | { nfserr_jukebox, -ERESTARTSYS }, |
062304a8 BF |
793 | { nfserr_jukebox, -EAGAIN }, |
794 | { nfserr_jukebox, -EWOULDBLOCK }, | |
3beb6cd1 | 795 | { nfserr_jukebox, -ENOMEM }, |
1da177e4 | 796 | { nfserr_io, -ETXTBSY }, |
a838cc49 | 797 | { nfserr_notsupp, -EOPNOTSUPP }, |
b7aeda40 | 798 | { nfserr_toosmall, -ETOOSMALL }, |
f39bde24 | 799 | { nfserr_serverfault, -ESERVERFAULT }, |
b3fbfe0e | 800 | { nfserr_serverfault, -ENFILE }, |
42e61616 | 801 | { nfserr_io, -EUCLEAN }, |
c952cd4e | 802 | { nfserr_perm, -ENOKEY }, |
1da177e4 LT |
803 | }; |
804 | int i; | |
805 | ||
63f10311 | 806 | for (i = 0; i < ARRAY_SIZE(nfs_errtbl); i++) { |
1da177e4 LT |
807 | if (nfs_errtbl[i].syserr == errno) |
808 | return nfs_errtbl[i].nfserr; | |
809 | } | |
ff30f08c | 810 | WARN_ONCE(1, "nfsd: non-standard errno: %d\n", errno); |
1da177e4 LT |
811 | return nfserr_io; |
812 | } | |
813 |