blob: aad6d457b9e8ef75d410d01de3dd6bac692c96fd [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 * Process version 2 NFS requests.
3 *
4 * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
5 */
6
Linus Torvalds1da177e2005-04-16 15:20:36 -07007#include <linux/namei.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07008
Boaz Harrosh9a74af22009-12-03 20:30:56 +02009#include "cache.h"
10#include "xdr.h"
J. Bruce Fields0a3adad2009-11-04 18:12:35 -050011#include "vfs.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070012
13typedef struct svc_rqst svc_rqst;
14typedef struct svc_buf svc_buf;
15
16#define NFSDDBG_FACILITY NFSDDBG_PROC
17
18
Al Viro7111c662006-10-19 23:28:45 -070019static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -070020nfsd_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
21{
22 return nfs_ok;
23}
24
Al Viroc4d987b2006-10-19 23:29:00 -070025static __be32
26nfsd_return_attrs(__be32 err, struct nfsd_attrstat *resp)
David Shaw846f2fc2006-01-18 17:43:51 -080027{
28 if (err) return err;
Jan Blunck54775492008-02-14 19:38:39 -080029 return nfserrno(vfs_getattr(resp->fh.fh_export->ex_path.mnt,
David Shaw846f2fc2006-01-18 17:43:51 -080030 resp->fh.fh_dentry,
31 &resp->stat));
32}
Al Viroc4d987b2006-10-19 23:29:00 -070033static __be32
34nfsd_return_dirop(__be32 err, struct nfsd_diropres *resp)
David Shaw846f2fc2006-01-18 17:43:51 -080035{
36 if (err) return err;
Jan Blunck54775492008-02-14 19:38:39 -080037 return nfserrno(vfs_getattr(resp->fh.fh_export->ex_path.mnt,
David Shaw846f2fc2006-01-18 17:43:51 -080038 resp->fh.fh_dentry,
39 &resp->stat));
40}
Linus Torvalds1da177e2005-04-16 15:20:36 -070041/*
42 * Get a file's attributes
43 * N.B. After this call resp->fh needs an fh_put
44 */
Al Viro7111c662006-10-19 23:28:45 -070045static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -070046nfsd_proc_getattr(struct svc_rqst *rqstp, struct nfsd_fhandle *argp,
47 struct nfsd_attrstat *resp)
48{
Al Viroc4d987b2006-10-19 23:29:00 -070049 __be32 nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -070050 dprintk("nfsd: GETATTR %s\n", SVCFH_fmt(&argp->fh));
51
52 fh_copy(&resp->fh, &argp->fh);
J. Bruce Fields04716e62008-08-07 13:00:20 -040053 nfserr = fh_verify(rqstp, &resp->fh, 0,
54 NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT);
David Shaw846f2fc2006-01-18 17:43:51 -080055 return nfsd_return_attrs(nfserr, resp);
Linus Torvalds1da177e2005-04-16 15:20:36 -070056}
57
58/*
59 * Set a file's attributes
60 * N.B. After this call resp->fh needs an fh_put
61 */
Al Viro7111c662006-10-19 23:28:45 -070062static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -070063nfsd_proc_setattr(struct svc_rqst *rqstp, struct nfsd_sattrargs *argp,
64 struct nfsd_attrstat *resp)
65{
Al Viroc4d987b2006-10-19 23:29:00 -070066 __be32 nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -070067 dprintk("nfsd: SETATTR %s, valid=%x, size=%ld\n",
68 SVCFH_fmt(&argp->fh),
69 argp->attrs.ia_valid, (long) argp->attrs.ia_size);
70
71 fh_copy(&resp->fh, &argp->fh);
David Shaw846f2fc2006-01-18 17:43:51 -080072 nfserr = nfsd_setattr(rqstp, &resp->fh, &argp->attrs,0, (time_t)0);
73 return nfsd_return_attrs(nfserr, resp);
Linus Torvalds1da177e2005-04-16 15:20:36 -070074}
75
76/*
77 * Look up a path name component
78 * Note: the dentry in the resp->fh may be negative if the file
79 * doesn't exist yet.
80 * N.B. After this call resp->fh needs an fh_put
81 */
Al Viro7111c662006-10-19 23:28:45 -070082static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -070083nfsd_proc_lookup(struct svc_rqst *rqstp, struct nfsd_diropargs *argp,
84 struct nfsd_diropres *resp)
85{
Al Viroc4d987b2006-10-19 23:29:00 -070086 __be32 nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -070087
88 dprintk("nfsd: LOOKUP %s %.*s\n",
89 SVCFH_fmt(&argp->fh), argp->len, argp->name);
90
91 fh_init(&resp->fh, NFS_FHSIZE);
92 nfserr = nfsd_lookup(rqstp, &argp->fh, argp->name, argp->len,
93 &resp->fh);
94
95 fh_put(&argp->fh);
David Shaw846f2fc2006-01-18 17:43:51 -080096 return nfsd_return_dirop(nfserr, resp);
Linus Torvalds1da177e2005-04-16 15:20:36 -070097}
98
99/*
100 * Read a symlink.
101 */
Al Viro7111c662006-10-19 23:28:45 -0700102static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103nfsd_proc_readlink(struct svc_rqst *rqstp, struct nfsd_readlinkargs *argp,
104 struct nfsd_readlinkres *resp)
105{
Al Viroc4d987b2006-10-19 23:29:00 -0700106 __be32 nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107
108 dprintk("nfsd: READLINK %s\n", SVCFH_fmt(&argp->fh));
109
110 /* Read the symlink. */
111 resp->len = NFS_MAXPATHLEN;
112 nfserr = nfsd_readlink(rqstp, &argp->fh, argp->buffer, &resp->len);
113
114 fh_put(&argp->fh);
115 return nfserr;
116}
117
118/*
119 * Read a portion of a file.
120 * N.B. After this call resp->fh needs an fh_put
121 */
Al Viro7111c662006-10-19 23:28:45 -0700122static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123nfsd_proc_read(struct svc_rqst *rqstp, struct nfsd_readargs *argp,
124 struct nfsd_readres *resp)
125{
Al Viroc4d987b2006-10-19 23:29:00 -0700126 __be32 nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127
128 dprintk("nfsd: READ %s %d bytes at %d\n",
129 SVCFH_fmt(&argp->fh),
130 argp->count, argp->offset);
131
132 /* Obtain buffer pointer for payload. 19 is 1 word for
133 * status, 17 words for fattr, and 1 word for the byte count.
134 */
135
Greg Banks7adae482006-10-04 02:15:47 -0700136 if (NFSSVC_MAXBLKSIZE_V2 < argp->count) {
Chuck Leverad06e4b2007-02-12 00:53:32 -0800137 char buf[RPC_MAX_ADDRBUFLEN];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 printk(KERN_NOTICE
Chuck Leverad06e4b2007-02-12 00:53:32 -0800139 "oversized read request from %s (%d bytes)\n",
140 svc_print_addr(rqstp, buf, sizeof(buf)),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141 argp->count);
Greg Banks7adae482006-10-04 02:15:47 -0700142 argp->count = NFSSVC_MAXBLKSIZE_V2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143 }
Jeff Laytoncd123012007-05-09 02:34:50 -0700144 svc_reserve_auth(rqstp, (19<<2) + argp->count + 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145
146 resp->count = argp->count;
J. Bruce Fields039a87c2010-07-30 11:33:32 -0400147 nfserr = nfsd_read(rqstp, fh_copy(&resp->fh, &argp->fh),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148 argp->offset,
NeilBrown3cc03b12006-10-04 02:15:47 -0700149 rqstp->rq_vec, argp->vlen,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150 &resp->count);
151
David Shaw846f2fc2006-01-18 17:43:51 -0800152 if (nfserr) return nfserr;
Jan Blunck54775492008-02-14 19:38:39 -0800153 return nfserrno(vfs_getattr(resp->fh.fh_export->ex_path.mnt,
David Shaw846f2fc2006-01-18 17:43:51 -0800154 resp->fh.fh_dentry,
155 &resp->stat));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156}
157
158/*
159 * Write data to a file
160 * N.B. After this call resp->fh needs an fh_put
161 */
Al Viro7111c662006-10-19 23:28:45 -0700162static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163nfsd_proc_write(struct svc_rqst *rqstp, struct nfsd_writeargs *argp,
164 struct nfsd_attrstat *resp)
165{
Al Viroc4d987b2006-10-19 23:29:00 -0700166 __be32 nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167 int stable = 1;
David Shaw31dec252009-03-05 20:16:14 -0500168 unsigned long cnt = argp->len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169
170 dprintk("nfsd: WRITE %s %d bytes at %d\n",
171 SVCFH_fmt(&argp->fh),
172 argp->len, argp->offset);
173
174 nfserr = nfsd_write(rqstp, fh_copy(&resp->fh, &argp->fh), NULL,
175 argp->offset,
NeilBrown3cc03b12006-10-04 02:15:47 -0700176 rqstp->rq_vec, argp->vlen,
David Shaw31dec252009-03-05 20:16:14 -0500177 &cnt,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 &stable);
David Shaw846f2fc2006-01-18 17:43:51 -0800179 return nfsd_return_attrs(nfserr, resp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180}
181
182/*
183 * CREATE processing is complicated. The keyword here is `overloaded.'
184 * The parent directory is kept locked between the check for existence
185 * and the actual create() call in compliance with VFS protocols.
186 * N.B. After this call _both_ argp->fh and resp->fh need an fh_put
187 */
Al Viro7111c662006-10-19 23:28:45 -0700188static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189nfsd_proc_create(struct svc_rqst *rqstp, struct nfsd_createargs *argp,
190 struct nfsd_diropres *resp)
191{
192 svc_fh *dirfhp = &argp->fh;
193 svc_fh *newfhp = &resp->fh;
194 struct iattr *attr = &argp->attrs;
195 struct inode *inode;
196 struct dentry *dchild;
Al Viroc4d987b2006-10-19 23:29:00 -0700197 int type, mode;
198 __be32 nfserr;
Jan Kara4a55c102012-06-12 16:20:33 +0200199 int hosterr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 dev_t rdev = 0, wanted = new_decode_dev(attr->ia_size);
201
202 dprintk("nfsd: CREATE %s %.*s\n",
203 SVCFH_fmt(dirfhp), argp->len, argp->name);
204
205 /* First verify the parent file handle */
Miklos Szeredi8837abc2008-06-16 13:20:29 +0200206 nfserr = fh_verify(rqstp, dirfhp, S_IFDIR, NFSD_MAY_EXEC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207 if (nfserr)
208 goto done; /* must fh_put dirfhp even on error */
209
Miklos Szeredi8837abc2008-06-16 13:20:29 +0200210 /* Check for NFSD_MAY_WRITE in nfsd_create if necessary */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211
212 nfserr = nfserr_acces;
213 if (!argp->len)
214 goto done;
215 nfserr = nfserr_exist;
216 if (isdotent(argp->name, argp->len))
217 goto done;
Jan Kara4a55c102012-06-12 16:20:33 +0200218 hosterr = fh_want_write(dirfhp);
219 if (hosterr) {
220 nfserr = nfserrno(hosterr);
221 goto done;
222 }
223
NeilBrown7ed94292006-10-04 02:15:43 -0700224 fh_lock_nested(dirfhp, I_MUTEX_PARENT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225 dchild = lookup_one_len(argp->name, dirfhp->fh_dentry, argp->len);
226 if (IS_ERR(dchild)) {
227 nfserr = nfserrno(PTR_ERR(dchild));
228 goto out_unlock;
229 }
230 fh_init(newfhp, NFS_FHSIZE);
231 nfserr = fh_compose(newfhp, dirfhp->fh_export, dchild, dirfhp);
232 if (!nfserr && !dchild->d_inode)
233 nfserr = nfserr_noent;
234 dput(dchild);
235 if (nfserr) {
236 if (nfserr != nfserr_noent)
237 goto out_unlock;
238 /*
239 * If the new file handle wasn't verified, we can't tell
240 * whether the file exists or not. Time to bail ...
241 */
242 nfserr = nfserr_acces;
243 if (!newfhp->fh_dentry) {
244 printk(KERN_WARNING
245 "nfsd_proc_create: file handle not verified\n");
246 goto out_unlock;
247 }
248 }
249
250 inode = newfhp->fh_dentry->d_inode;
251
252 /* Unfudge the mode bits */
253 if (attr->ia_valid & ATTR_MODE) {
254 type = attr->ia_mode & S_IFMT;
255 mode = attr->ia_mode & ~S_IFMT;
256 if (!type) {
257 /* no type, so if target exists, assume same as that,
258 * else assume a file */
259 if (inode) {
260 type = inode->i_mode & S_IFMT;
261 switch(type) {
262 case S_IFCHR:
263 case S_IFBLK:
264 /* reserve rdev for later checking */
265 rdev = inode->i_rdev;
266 attr->ia_valid |= ATTR_SIZE;
267
268 /* FALLTHROUGH */
269 case S_IFIFO:
270 /* this is probably a permission check..
271 * at least IRIX implements perm checking on
272 * echo thing > device-special-file-or-pipe
273 * by doing a CREATE with type==0
274 */
J. Bruce Fields0ec757d2007-07-17 04:04:48 -0700275 nfserr = nfsd_permission(rqstp,
276 newfhp->fh_export,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277 newfhp->fh_dentry,
Miklos Szeredi8837abc2008-06-16 13:20:29 +0200278 NFSD_MAY_WRITE|NFSD_MAY_LOCAL_ACCESS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279 if (nfserr && nfserr != nfserr_rofs)
280 goto out_unlock;
281 }
282 } else
283 type = S_IFREG;
284 }
285 } else if (inode) {
286 type = inode->i_mode & S_IFMT;
287 mode = inode->i_mode & ~S_IFMT;
288 } else {
289 type = S_IFREG;
290 mode = 0; /* ??? */
291 }
292
293 attr->ia_valid |= ATTR_MODE;
294 attr->ia_mode = mode;
295
296 /* Special treatment for non-regular files according to the
297 * gospel of sun micro
298 */
299 if (type != S_IFREG) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 if (type != S_IFBLK && type != S_IFCHR) {
301 rdev = 0;
302 } else if (type == S_IFCHR && !(attr->ia_valid & ATTR_SIZE)) {
303 /* If you think you've seen the worst, grok this. */
304 type = S_IFIFO;
305 } else {
306 /* Okay, char or block special */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307 if (!rdev)
308 rdev = wanted;
309 }
310
311 /* we've used the SIZE information, so discard it */
312 attr->ia_valid &= ~ATTR_SIZE;
313
314 /* Make sure the type and device matches */
315 nfserr = nfserr_exist;
316 if (inode && type != (inode->i_mode & S_IFMT))
317 goto out_unlock;
318 }
319
320 nfserr = 0;
321 if (!inode) {
322 /* File doesn't exist. Create it and set attrs */
323 nfserr = nfsd_create(rqstp, dirfhp, argp->name, argp->len,
324 attr, type, rdev, newfhp);
325 } else if (type == S_IFREG) {
326 dprintk("nfsd: existing %s, valid=%x, size=%ld\n",
327 argp->name, attr->ia_valid, (long) attr->ia_size);
328 /* File already exists. We ignore all attributes except
329 * size, so that creat() behaves exactly like
330 * open(..., O_CREAT|O_TRUNC|O_WRONLY).
331 */
332 attr->ia_valid &= ATTR_SIZE;
333 if (attr->ia_valid)
334 nfserr = nfsd_setattr(rqstp, newfhp, attr, 0, (time_t)0);
335 }
336
337out_unlock:
338 /* We don't really need to unlock, as fh_put does it. */
339 fh_unlock(dirfhp);
Jan Kara4a55c102012-06-12 16:20:33 +0200340 fh_drop_write(dirfhp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341done:
342 fh_put(dirfhp);
David Shaw846f2fc2006-01-18 17:43:51 -0800343 return nfsd_return_dirop(nfserr, resp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344}
345
Al Viro7111c662006-10-19 23:28:45 -0700346static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347nfsd_proc_remove(struct svc_rqst *rqstp, struct nfsd_diropargs *argp,
348 void *resp)
349{
Al Viroc4d987b2006-10-19 23:29:00 -0700350 __be32 nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351
352 dprintk("nfsd: REMOVE %s %.*s\n", SVCFH_fmt(&argp->fh),
353 argp->len, argp->name);
354
355 /* Unlink. -SIFDIR means file must not be a directory */
356 nfserr = nfsd_unlink(rqstp, &argp->fh, -S_IFDIR, argp->name, argp->len);
357 fh_put(&argp->fh);
358 return nfserr;
359}
360
Al Viro7111c662006-10-19 23:28:45 -0700361static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362nfsd_proc_rename(struct svc_rqst *rqstp, struct nfsd_renameargs *argp,
363 void *resp)
364{
Al Viroc4d987b2006-10-19 23:29:00 -0700365 __be32 nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366
367 dprintk("nfsd: RENAME %s %.*s -> \n",
368 SVCFH_fmt(&argp->ffh), argp->flen, argp->fname);
369 dprintk("nfsd: -> %s %.*s\n",
370 SVCFH_fmt(&argp->tfh), argp->tlen, argp->tname);
371
372 nfserr = nfsd_rename(rqstp, &argp->ffh, argp->fname, argp->flen,
373 &argp->tfh, argp->tname, argp->tlen);
374 fh_put(&argp->ffh);
375 fh_put(&argp->tfh);
376 return nfserr;
377}
378
Al Viro7111c662006-10-19 23:28:45 -0700379static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380nfsd_proc_link(struct svc_rqst *rqstp, struct nfsd_linkargs *argp,
381 void *resp)
382{
Al Viroc4d987b2006-10-19 23:29:00 -0700383 __be32 nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384
385 dprintk("nfsd: LINK %s ->\n",
386 SVCFH_fmt(&argp->ffh));
387 dprintk("nfsd: %s %.*s\n",
388 SVCFH_fmt(&argp->tfh),
389 argp->tlen,
390 argp->tname);
391
392 nfserr = nfsd_link(rqstp, &argp->tfh, argp->tname, argp->tlen,
393 &argp->ffh);
394 fh_put(&argp->ffh);
395 fh_put(&argp->tfh);
396 return nfserr;
397}
398
Al Viro7111c662006-10-19 23:28:45 -0700399static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400nfsd_proc_symlink(struct svc_rqst *rqstp, struct nfsd_symlinkargs *argp,
401 void *resp)
402{
403 struct svc_fh newfh;
Al Viroc4d987b2006-10-19 23:29:00 -0700404 __be32 nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405
406 dprintk("nfsd: SYMLINK %s %.*s -> %.*s\n",
407 SVCFH_fmt(&argp->ffh), argp->flen, argp->fname,
408 argp->tlen, argp->tname);
409
410 fh_init(&newfh, NFS_FHSIZE);
411 /*
412 * Create the link, look up new file and set attrs.
413 */
414 nfserr = nfsd_symlink(rqstp, &argp->ffh, argp->fname, argp->flen,
415 argp->tname, argp->tlen,
416 &newfh, &argp->attrs);
417
418
419 fh_put(&argp->ffh);
420 fh_put(&newfh);
421 return nfserr;
422}
423
424/*
425 * Make directory. This operation is not idempotent.
426 * N.B. After this call resp->fh needs an fh_put
427 */
Al Viro7111c662006-10-19 23:28:45 -0700428static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429nfsd_proc_mkdir(struct svc_rqst *rqstp, struct nfsd_createargs *argp,
430 struct nfsd_diropres *resp)
431{
Al Viroc4d987b2006-10-19 23:29:00 -0700432 __be32 nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433
434 dprintk("nfsd: MKDIR %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name);
435
436 if (resp->fh.fh_dentry) {
437 printk(KERN_WARNING
438 "nfsd_proc_mkdir: response already verified??\n");
439 }
440
441 argp->attrs.ia_valid &= ~ATTR_SIZE;
442 fh_init(&resp->fh, NFS_FHSIZE);
443 nfserr = nfsd_create(rqstp, &argp->fh, argp->name, argp->len,
444 &argp->attrs, S_IFDIR, 0, &resp->fh);
445 fh_put(&argp->fh);
David Shaw846f2fc2006-01-18 17:43:51 -0800446 return nfsd_return_dirop(nfserr, resp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447}
448
449/*
450 * Remove a directory
451 */
Al Viro7111c662006-10-19 23:28:45 -0700452static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453nfsd_proc_rmdir(struct svc_rqst *rqstp, struct nfsd_diropargs *argp,
454 void *resp)
455{
Al Viroc4d987b2006-10-19 23:29:00 -0700456 __be32 nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457
458 dprintk("nfsd: RMDIR %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name);
459
460 nfserr = nfsd_unlink(rqstp, &argp->fh, S_IFDIR, argp->name, argp->len);
461 fh_put(&argp->fh);
462 return nfserr;
463}
464
465/*
466 * Read a portion of a directory.
467 */
Al Viro7111c662006-10-19 23:28:45 -0700468static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469nfsd_proc_readdir(struct svc_rqst *rqstp, struct nfsd_readdirargs *argp,
470 struct nfsd_readdirres *resp)
471{
Al Viroc4d987b2006-10-19 23:29:00 -0700472 int count;
473 __be32 nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474 loff_t offset;
475
476 dprintk("nfsd: READDIR %s %d bytes at %d\n",
477 SVCFH_fmt(&argp->fh),
478 argp->count, argp->cookie);
479
480 /* Shrink to the client read size */
481 count = (argp->count >> 2) - 2;
482
483 /* Make sure we've room for the NULL ptr & eof flag */
484 count -= 2;
485 if (count < 0)
486 count = 0;
487
488 resp->buffer = argp->buffer;
489 resp->offset = NULL;
490 resp->buflen = count;
491 resp->common.err = nfs_ok;
492 /* Read directory and encode entries on the fly */
493 offset = argp->cookie;
494 nfserr = nfsd_readdir(rqstp, &argp->fh, &offset,
495 &resp->common, nfssvc_encode_entry);
496
497 resp->count = resp->buffer - argp->buffer;
498 if (resp->offset)
499 *resp->offset = htonl(offset);
500
501 fh_put(&argp->fh);
502 return nfserr;
503}
504
505/*
506 * Get file system info
507 */
Al Viro7111c662006-10-19 23:28:45 -0700508static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509nfsd_proc_statfs(struct svc_rqst * rqstp, struct nfsd_fhandle *argp,
510 struct nfsd_statfsres *resp)
511{
Al Viroc4d987b2006-10-19 23:29:00 -0700512 __be32 nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513
514 dprintk("nfsd: STATFS %s\n", SVCFH_fmt(&argp->fh));
515
J. Bruce Fields04716e62008-08-07 13:00:20 -0400516 nfserr = nfsd_statfs(rqstp, &argp->fh, &resp->stats,
517 NFSD_MAY_BYPASS_GSS_ON_ROOT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 fh_put(&argp->fh);
519 return nfserr;
520}
521
522/*
523 * NFSv2 Server procedures.
524 * Only the results of non-idempotent operations are cached.
525 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526struct nfsd_void { int dummy; };
527
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528#define ST 1 /* status */
529#define FH 8 /* filehandle */
530#define AT 18 /* attributes */
531
532static struct svc_procedure nfsd_procedures2[18] = {
Yu Zhiguob9081d92009-06-09 17:33:34 +0800533 [NFSPROC_NULL] = {
534 .pc_func = (svc_procfunc) nfsd_proc_null,
535 .pc_decode = (kxdrproc_t) nfssvc_decode_void,
536 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
537 .pc_argsize = sizeof(struct nfsd_void),
538 .pc_ressize = sizeof(struct nfsd_void),
539 .pc_cachetype = RC_NOCACHE,
540 .pc_xdrressize = ST,
541 },
542 [NFSPROC_GETATTR] = {
543 .pc_func = (svc_procfunc) nfsd_proc_getattr,
544 .pc_decode = (kxdrproc_t) nfssvc_decode_fhandle,
545 .pc_encode = (kxdrproc_t) nfssvc_encode_attrstat,
546 .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
547 .pc_argsize = sizeof(struct nfsd_fhandle),
548 .pc_ressize = sizeof(struct nfsd_attrstat),
549 .pc_cachetype = RC_NOCACHE,
550 .pc_xdrressize = ST+AT,
551 },
552 [NFSPROC_SETATTR] = {
553 .pc_func = (svc_procfunc) nfsd_proc_setattr,
554 .pc_decode = (kxdrproc_t) nfssvc_decode_sattrargs,
555 .pc_encode = (kxdrproc_t) nfssvc_encode_attrstat,
556 .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
557 .pc_argsize = sizeof(struct nfsd_sattrargs),
558 .pc_ressize = sizeof(struct nfsd_attrstat),
559 .pc_cachetype = RC_REPLBUFF,
560 .pc_xdrressize = ST+AT,
561 },
562 [NFSPROC_ROOT] = {
563 .pc_decode = (kxdrproc_t) nfssvc_decode_void,
564 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
565 .pc_argsize = sizeof(struct nfsd_void),
566 .pc_ressize = sizeof(struct nfsd_void),
567 .pc_cachetype = RC_NOCACHE,
568 .pc_xdrressize = ST,
569 },
570 [NFSPROC_LOOKUP] = {
571 .pc_func = (svc_procfunc) nfsd_proc_lookup,
572 .pc_decode = (kxdrproc_t) nfssvc_decode_diropargs,
573 .pc_encode = (kxdrproc_t) nfssvc_encode_diropres,
574 .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
575 .pc_argsize = sizeof(struct nfsd_diropargs),
576 .pc_ressize = sizeof(struct nfsd_diropres),
577 .pc_cachetype = RC_NOCACHE,
578 .pc_xdrressize = ST+FH+AT,
579 },
580 [NFSPROC_READLINK] = {
581 .pc_func = (svc_procfunc) nfsd_proc_readlink,
582 .pc_decode = (kxdrproc_t) nfssvc_decode_readlinkargs,
583 .pc_encode = (kxdrproc_t) nfssvc_encode_readlinkres,
584 .pc_argsize = sizeof(struct nfsd_readlinkargs),
585 .pc_ressize = sizeof(struct nfsd_readlinkres),
586 .pc_cachetype = RC_NOCACHE,
587 .pc_xdrressize = ST+1+NFS_MAXPATHLEN/4,
588 },
589 [NFSPROC_READ] = {
590 .pc_func = (svc_procfunc) nfsd_proc_read,
591 .pc_decode = (kxdrproc_t) nfssvc_decode_readargs,
592 .pc_encode = (kxdrproc_t) nfssvc_encode_readres,
593 .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
594 .pc_argsize = sizeof(struct nfsd_readargs),
595 .pc_ressize = sizeof(struct nfsd_readres),
596 .pc_cachetype = RC_NOCACHE,
597 .pc_xdrressize = ST+AT+1+NFSSVC_MAXBLKSIZE_V2/4,
598 },
599 [NFSPROC_WRITECACHE] = {
600 .pc_decode = (kxdrproc_t) nfssvc_decode_void,
601 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
602 .pc_argsize = sizeof(struct nfsd_void),
603 .pc_ressize = sizeof(struct nfsd_void),
604 .pc_cachetype = RC_NOCACHE,
605 .pc_xdrressize = ST,
606 },
607 [NFSPROC_WRITE] = {
608 .pc_func = (svc_procfunc) nfsd_proc_write,
609 .pc_decode = (kxdrproc_t) nfssvc_decode_writeargs,
610 .pc_encode = (kxdrproc_t) nfssvc_encode_attrstat,
611 .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
612 .pc_argsize = sizeof(struct nfsd_writeargs),
613 .pc_ressize = sizeof(struct nfsd_attrstat),
614 .pc_cachetype = RC_REPLBUFF,
615 .pc_xdrressize = ST+AT,
616 },
617 [NFSPROC_CREATE] = {
618 .pc_func = (svc_procfunc) nfsd_proc_create,
619 .pc_decode = (kxdrproc_t) nfssvc_decode_createargs,
620 .pc_encode = (kxdrproc_t) nfssvc_encode_diropres,
621 .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
622 .pc_argsize = sizeof(struct nfsd_createargs),
623 .pc_ressize = sizeof(struct nfsd_diropres),
624 .pc_cachetype = RC_REPLBUFF,
625 .pc_xdrressize = ST+FH+AT,
626 },
627 [NFSPROC_REMOVE] = {
628 .pc_func = (svc_procfunc) nfsd_proc_remove,
629 .pc_decode = (kxdrproc_t) nfssvc_decode_diropargs,
630 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
631 .pc_argsize = sizeof(struct nfsd_diropargs),
632 .pc_ressize = sizeof(struct nfsd_void),
633 .pc_cachetype = RC_REPLSTAT,
634 .pc_xdrressize = ST,
635 },
636 [NFSPROC_RENAME] = {
637 .pc_func = (svc_procfunc) nfsd_proc_rename,
638 .pc_decode = (kxdrproc_t) nfssvc_decode_renameargs,
639 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
640 .pc_argsize = sizeof(struct nfsd_renameargs),
641 .pc_ressize = sizeof(struct nfsd_void),
642 .pc_cachetype = RC_REPLSTAT,
643 .pc_xdrressize = ST,
644 },
645 [NFSPROC_LINK] = {
646 .pc_func = (svc_procfunc) nfsd_proc_link,
647 .pc_decode = (kxdrproc_t) nfssvc_decode_linkargs,
648 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
649 .pc_argsize = sizeof(struct nfsd_linkargs),
650 .pc_ressize = sizeof(struct nfsd_void),
651 .pc_cachetype = RC_REPLSTAT,
652 .pc_xdrressize = ST,
653 },
654 [NFSPROC_SYMLINK] = {
655 .pc_func = (svc_procfunc) nfsd_proc_symlink,
656 .pc_decode = (kxdrproc_t) nfssvc_decode_symlinkargs,
657 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
658 .pc_argsize = sizeof(struct nfsd_symlinkargs),
659 .pc_ressize = sizeof(struct nfsd_void),
660 .pc_cachetype = RC_REPLSTAT,
661 .pc_xdrressize = ST,
662 },
663 [NFSPROC_MKDIR] = {
664 .pc_func = (svc_procfunc) nfsd_proc_mkdir,
665 .pc_decode = (kxdrproc_t) nfssvc_decode_createargs,
666 .pc_encode = (kxdrproc_t) nfssvc_encode_diropres,
667 .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
668 .pc_argsize = sizeof(struct nfsd_createargs),
669 .pc_ressize = sizeof(struct nfsd_diropres),
670 .pc_cachetype = RC_REPLBUFF,
671 .pc_xdrressize = ST+FH+AT,
672 },
673 [NFSPROC_RMDIR] = {
674 .pc_func = (svc_procfunc) nfsd_proc_rmdir,
675 .pc_decode = (kxdrproc_t) nfssvc_decode_diropargs,
676 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
677 .pc_argsize = sizeof(struct nfsd_diropargs),
678 .pc_ressize = sizeof(struct nfsd_void),
679 .pc_cachetype = RC_REPLSTAT,
680 .pc_xdrressize = ST,
681 },
682 [NFSPROC_READDIR] = {
683 .pc_func = (svc_procfunc) nfsd_proc_readdir,
684 .pc_decode = (kxdrproc_t) nfssvc_decode_readdirargs,
685 .pc_encode = (kxdrproc_t) nfssvc_encode_readdirres,
686 .pc_argsize = sizeof(struct nfsd_readdirargs),
687 .pc_ressize = sizeof(struct nfsd_readdirres),
688 .pc_cachetype = RC_NOCACHE,
689 },
690 [NFSPROC_STATFS] = {
691 .pc_func = (svc_procfunc) nfsd_proc_statfs,
692 .pc_decode = (kxdrproc_t) nfssvc_decode_fhandle,
693 .pc_encode = (kxdrproc_t) nfssvc_encode_statfsres,
694 .pc_argsize = sizeof(struct nfsd_fhandle),
695 .pc_ressize = sizeof(struct nfsd_statfsres),
696 .pc_cachetype = RC_NOCACHE,
697 .pc_xdrressize = ST+5,
698 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700699};
700
701
702struct svc_version nfsd_version2 = {
703 .vs_vers = 2,
704 .vs_nproc = 18,
705 .vs_proc = nfsd_procedures2,
706 .vs_dispatch = nfsd_dispatch,
707 .vs_xdrsize = NFS2_SVC_XDRSIZE,
708};
709
710/*
711 * Map errnos to NFS errnos.
712 */
Al Viro63f103112006-10-19 23:28:54 -0700713__be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714nfserrno (int errno)
715{
716 static struct {
Al Viro63f103112006-10-19 23:28:54 -0700717 __be32 nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700718 int syserr;
719 } nfs_errtbl[] = {
720 { nfs_ok, 0 },
721 { nfserr_perm, -EPERM },
722 { nfserr_noent, -ENOENT },
723 { nfserr_io, -EIO },
724 { nfserr_nxio, -ENXIO },
725 { nfserr_acces, -EACCES },
726 { nfserr_exist, -EEXIST },
727 { nfserr_xdev, -EXDEV },
728 { nfserr_mlink, -EMLINK },
729 { nfserr_nodev, -ENODEV },
730 { nfserr_notdir, -ENOTDIR },
731 { nfserr_isdir, -EISDIR },
732 { nfserr_inval, -EINVAL },
733 { nfserr_fbig, -EFBIG },
734 { nfserr_nospc, -ENOSPC },
735 { nfserr_rofs, -EROFS },
736 { nfserr_mlink, -EMLINK },
737 { nfserr_nametoolong, -ENAMETOOLONG },
738 { nfserr_notempty, -ENOTEMPTY },
739#ifdef EDQUOT
740 { nfserr_dquot, -EDQUOT },
741#endif
742 { nfserr_stale, -ESTALE },
743 { nfserr_jukebox, -ETIMEDOUT },
NeilBrown599eb302008-06-19 10:11:09 +1000744 { nfserr_jukebox, -ERESTARTSYS },
J. Bruce Fields062304a2011-01-02 22:05:33 -0500745 { nfserr_jukebox, -EAGAIN },
746 { nfserr_jukebox, -EWOULDBLOCK },
J. Bruce Fields3beb6cd2011-01-01 15:43:50 -0500747 { nfserr_jukebox, -ENOMEM },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748 { nfserr_io, -ETXTBSY },
Andreas Gruenbachera838cc42005-06-22 17:16:24 +0000749 { nfserr_notsupp, -EOPNOTSUPP },
Dean Hildebrandb7aeda42008-12-15 19:40:15 +0200750 { nfserr_toosmall, -ETOOSMALL },
J. Bruce Fieldsf39bde22009-09-27 14:41:43 -0400751 { nfserr_serverfault, -ESERVERFAULT },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752 };
753 int i;
754
Al Viro63f103112006-10-19 23:28:54 -0700755 for (i = 0; i < ARRAY_SIZE(nfs_errtbl); i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756 if (nfs_errtbl[i].syserr == errno)
757 return nfs_errtbl[i].nfserr;
758 }
759 printk (KERN_INFO "nfsd: non-standard errno: %d\n", errno);
760 return nfserr_io;
761}
762