blob: a047ad6111ef2e1c6820097ee3b01a77de8ce20b [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;
147 nfserr = nfsd_read(rqstp, fh_copy(&resp->fh, &argp->fh), NULL,
148 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199 dev_t rdev = 0, wanted = new_decode_dev(attr->ia_size);
200
201 dprintk("nfsd: CREATE %s %.*s\n",
202 SVCFH_fmt(dirfhp), argp->len, argp->name);
203
204 /* First verify the parent file handle */
Miklos Szeredi8837abc2008-06-16 13:20:29 +0200205 nfserr = fh_verify(rqstp, dirfhp, S_IFDIR, NFSD_MAY_EXEC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206 if (nfserr)
207 goto done; /* must fh_put dirfhp even on error */
208
Miklos Szeredi8837abc2008-06-16 13:20:29 +0200209 /* Check for NFSD_MAY_WRITE in nfsd_create if necessary */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210
211 nfserr = nfserr_acces;
212 if (!argp->len)
213 goto done;
214 nfserr = nfserr_exist;
215 if (isdotent(argp->name, argp->len))
216 goto done;
NeilBrown7ed94292006-10-04 02:15:43 -0700217 fh_lock_nested(dirfhp, I_MUTEX_PARENT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218 dchild = lookup_one_len(argp->name, dirfhp->fh_dentry, argp->len);
219 if (IS_ERR(dchild)) {
220 nfserr = nfserrno(PTR_ERR(dchild));
221 goto out_unlock;
222 }
223 fh_init(newfhp, NFS_FHSIZE);
224 nfserr = fh_compose(newfhp, dirfhp->fh_export, dchild, dirfhp);
225 if (!nfserr && !dchild->d_inode)
226 nfserr = nfserr_noent;
227 dput(dchild);
228 if (nfserr) {
229 if (nfserr != nfserr_noent)
230 goto out_unlock;
231 /*
232 * If the new file handle wasn't verified, we can't tell
233 * whether the file exists or not. Time to bail ...
234 */
235 nfserr = nfserr_acces;
236 if (!newfhp->fh_dentry) {
237 printk(KERN_WARNING
238 "nfsd_proc_create: file handle not verified\n");
239 goto out_unlock;
240 }
241 }
242
243 inode = newfhp->fh_dentry->d_inode;
244
245 /* Unfudge the mode bits */
246 if (attr->ia_valid & ATTR_MODE) {
247 type = attr->ia_mode & S_IFMT;
248 mode = attr->ia_mode & ~S_IFMT;
249 if (!type) {
250 /* no type, so if target exists, assume same as that,
251 * else assume a file */
252 if (inode) {
253 type = inode->i_mode & S_IFMT;
254 switch(type) {
255 case S_IFCHR:
256 case S_IFBLK:
257 /* reserve rdev for later checking */
258 rdev = inode->i_rdev;
259 attr->ia_valid |= ATTR_SIZE;
260
261 /* FALLTHROUGH */
262 case S_IFIFO:
263 /* this is probably a permission check..
264 * at least IRIX implements perm checking on
265 * echo thing > device-special-file-or-pipe
266 * by doing a CREATE with type==0
267 */
J. Bruce Fields0ec757d2007-07-17 04:04:48 -0700268 nfserr = nfsd_permission(rqstp,
269 newfhp->fh_export,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270 newfhp->fh_dentry,
Miklos Szeredi8837abc2008-06-16 13:20:29 +0200271 NFSD_MAY_WRITE|NFSD_MAY_LOCAL_ACCESS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272 if (nfserr && nfserr != nfserr_rofs)
273 goto out_unlock;
274 }
275 } else
276 type = S_IFREG;
277 }
278 } else if (inode) {
279 type = inode->i_mode & S_IFMT;
280 mode = inode->i_mode & ~S_IFMT;
281 } else {
282 type = S_IFREG;
283 mode = 0; /* ??? */
284 }
285
286 attr->ia_valid |= ATTR_MODE;
287 attr->ia_mode = mode;
288
289 /* Special treatment for non-regular files according to the
290 * gospel of sun micro
291 */
292 if (type != S_IFREG) {
293 int is_borc = 0;
294 if (type != S_IFBLK && type != S_IFCHR) {
295 rdev = 0;
296 } else if (type == S_IFCHR && !(attr->ia_valid & ATTR_SIZE)) {
297 /* If you think you've seen the worst, grok this. */
298 type = S_IFIFO;
299 } else {
300 /* Okay, char or block special */
301 is_borc = 1;
302 if (!rdev)
303 rdev = wanted;
304 }
305
306 /* we've used the SIZE information, so discard it */
307 attr->ia_valid &= ~ATTR_SIZE;
308
309 /* Make sure the type and device matches */
310 nfserr = nfserr_exist;
311 if (inode && type != (inode->i_mode & S_IFMT))
312 goto out_unlock;
313 }
314
315 nfserr = 0;
316 if (!inode) {
317 /* File doesn't exist. Create it and set attrs */
318 nfserr = nfsd_create(rqstp, dirfhp, argp->name, argp->len,
319 attr, type, rdev, newfhp);
320 } else if (type == S_IFREG) {
321 dprintk("nfsd: existing %s, valid=%x, size=%ld\n",
322 argp->name, attr->ia_valid, (long) attr->ia_size);
323 /* File already exists. We ignore all attributes except
324 * size, so that creat() behaves exactly like
325 * open(..., O_CREAT|O_TRUNC|O_WRONLY).
326 */
327 attr->ia_valid &= ATTR_SIZE;
328 if (attr->ia_valid)
329 nfserr = nfsd_setattr(rqstp, newfhp, attr, 0, (time_t)0);
330 }
331
332out_unlock:
333 /* We don't really need to unlock, as fh_put does it. */
334 fh_unlock(dirfhp);
335
336done:
337 fh_put(dirfhp);
David Shaw846f2fc2006-01-18 17:43:51 -0800338 return nfsd_return_dirop(nfserr, resp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339}
340
Al Viro7111c662006-10-19 23:28:45 -0700341static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342nfsd_proc_remove(struct svc_rqst *rqstp, struct nfsd_diropargs *argp,
343 void *resp)
344{
Al Viroc4d987b2006-10-19 23:29:00 -0700345 __be32 nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346
347 dprintk("nfsd: REMOVE %s %.*s\n", SVCFH_fmt(&argp->fh),
348 argp->len, argp->name);
349
350 /* Unlink. -SIFDIR means file must not be a directory */
351 nfserr = nfsd_unlink(rqstp, &argp->fh, -S_IFDIR, argp->name, argp->len);
352 fh_put(&argp->fh);
353 return nfserr;
354}
355
Al Viro7111c662006-10-19 23:28:45 -0700356static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357nfsd_proc_rename(struct svc_rqst *rqstp, struct nfsd_renameargs *argp,
358 void *resp)
359{
Al Viroc4d987b2006-10-19 23:29:00 -0700360 __be32 nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361
362 dprintk("nfsd: RENAME %s %.*s -> \n",
363 SVCFH_fmt(&argp->ffh), argp->flen, argp->fname);
364 dprintk("nfsd: -> %s %.*s\n",
365 SVCFH_fmt(&argp->tfh), argp->tlen, argp->tname);
366
367 nfserr = nfsd_rename(rqstp, &argp->ffh, argp->fname, argp->flen,
368 &argp->tfh, argp->tname, argp->tlen);
369 fh_put(&argp->ffh);
370 fh_put(&argp->tfh);
371 return nfserr;
372}
373
Al Viro7111c662006-10-19 23:28:45 -0700374static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375nfsd_proc_link(struct svc_rqst *rqstp, struct nfsd_linkargs *argp,
376 void *resp)
377{
Al Viroc4d987b2006-10-19 23:29:00 -0700378 __be32 nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379
380 dprintk("nfsd: LINK %s ->\n",
381 SVCFH_fmt(&argp->ffh));
382 dprintk("nfsd: %s %.*s\n",
383 SVCFH_fmt(&argp->tfh),
384 argp->tlen,
385 argp->tname);
386
387 nfserr = nfsd_link(rqstp, &argp->tfh, argp->tname, argp->tlen,
388 &argp->ffh);
389 fh_put(&argp->ffh);
390 fh_put(&argp->tfh);
391 return nfserr;
392}
393
Al Viro7111c662006-10-19 23:28:45 -0700394static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395nfsd_proc_symlink(struct svc_rqst *rqstp, struct nfsd_symlinkargs *argp,
396 void *resp)
397{
398 struct svc_fh newfh;
Al Viroc4d987b2006-10-19 23:29:00 -0700399 __be32 nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400
401 dprintk("nfsd: SYMLINK %s %.*s -> %.*s\n",
402 SVCFH_fmt(&argp->ffh), argp->flen, argp->fname,
403 argp->tlen, argp->tname);
404
405 fh_init(&newfh, NFS_FHSIZE);
406 /*
407 * Create the link, look up new file and set attrs.
408 */
409 nfserr = nfsd_symlink(rqstp, &argp->ffh, argp->fname, argp->flen,
410 argp->tname, argp->tlen,
411 &newfh, &argp->attrs);
412
413
414 fh_put(&argp->ffh);
415 fh_put(&newfh);
416 return nfserr;
417}
418
419/*
420 * Make directory. This operation is not idempotent.
421 * N.B. After this call resp->fh needs an fh_put
422 */
Al Viro7111c662006-10-19 23:28:45 -0700423static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424nfsd_proc_mkdir(struct svc_rqst *rqstp, struct nfsd_createargs *argp,
425 struct nfsd_diropres *resp)
426{
Al Viroc4d987b2006-10-19 23:29:00 -0700427 __be32 nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428
429 dprintk("nfsd: MKDIR %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name);
430
431 if (resp->fh.fh_dentry) {
432 printk(KERN_WARNING
433 "nfsd_proc_mkdir: response already verified??\n");
434 }
435
436 argp->attrs.ia_valid &= ~ATTR_SIZE;
437 fh_init(&resp->fh, NFS_FHSIZE);
438 nfserr = nfsd_create(rqstp, &argp->fh, argp->name, argp->len,
439 &argp->attrs, S_IFDIR, 0, &resp->fh);
440 fh_put(&argp->fh);
David Shaw846f2fc2006-01-18 17:43:51 -0800441 return nfsd_return_dirop(nfserr, resp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442}
443
444/*
445 * Remove a directory
446 */
Al Viro7111c662006-10-19 23:28:45 -0700447static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448nfsd_proc_rmdir(struct svc_rqst *rqstp, struct nfsd_diropargs *argp,
449 void *resp)
450{
Al Viroc4d987b2006-10-19 23:29:00 -0700451 __be32 nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452
453 dprintk("nfsd: RMDIR %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name);
454
455 nfserr = nfsd_unlink(rqstp, &argp->fh, S_IFDIR, argp->name, argp->len);
456 fh_put(&argp->fh);
457 return nfserr;
458}
459
460/*
461 * Read a portion of a directory.
462 */
Al Viro7111c662006-10-19 23:28:45 -0700463static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464nfsd_proc_readdir(struct svc_rqst *rqstp, struct nfsd_readdirargs *argp,
465 struct nfsd_readdirres *resp)
466{
Al Viroc4d987b2006-10-19 23:29:00 -0700467 int count;
468 __be32 nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469 loff_t offset;
470
471 dprintk("nfsd: READDIR %s %d bytes at %d\n",
472 SVCFH_fmt(&argp->fh),
473 argp->count, argp->cookie);
474
475 /* Shrink to the client read size */
476 count = (argp->count >> 2) - 2;
477
478 /* Make sure we've room for the NULL ptr & eof flag */
479 count -= 2;
480 if (count < 0)
481 count = 0;
482
483 resp->buffer = argp->buffer;
484 resp->offset = NULL;
485 resp->buflen = count;
486 resp->common.err = nfs_ok;
487 /* Read directory and encode entries on the fly */
488 offset = argp->cookie;
489 nfserr = nfsd_readdir(rqstp, &argp->fh, &offset,
490 &resp->common, nfssvc_encode_entry);
491
492 resp->count = resp->buffer - argp->buffer;
493 if (resp->offset)
494 *resp->offset = htonl(offset);
495
496 fh_put(&argp->fh);
497 return nfserr;
498}
499
500/*
501 * Get file system info
502 */
Al Viro7111c662006-10-19 23:28:45 -0700503static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504nfsd_proc_statfs(struct svc_rqst * rqstp, struct nfsd_fhandle *argp,
505 struct nfsd_statfsres *resp)
506{
Al Viroc4d987b2006-10-19 23:29:00 -0700507 __be32 nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508
509 dprintk("nfsd: STATFS %s\n", SVCFH_fmt(&argp->fh));
510
J. Bruce Fields04716e62008-08-07 13:00:20 -0400511 nfserr = nfsd_statfs(rqstp, &argp->fh, &resp->stats,
512 NFSD_MAY_BYPASS_GSS_ON_ROOT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513 fh_put(&argp->fh);
514 return nfserr;
515}
516
517/*
518 * NFSv2 Server procedures.
519 * Only the results of non-idempotent operations are cached.
520 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521struct nfsd_void { int dummy; };
522
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523#define ST 1 /* status */
524#define FH 8 /* filehandle */
525#define AT 18 /* attributes */
526
527static struct svc_procedure nfsd_procedures2[18] = {
Yu Zhiguob9081d92009-06-09 17:33:34 +0800528 [NFSPROC_NULL] = {
529 .pc_func = (svc_procfunc) nfsd_proc_null,
530 .pc_decode = (kxdrproc_t) nfssvc_decode_void,
531 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
532 .pc_argsize = sizeof(struct nfsd_void),
533 .pc_ressize = sizeof(struct nfsd_void),
534 .pc_cachetype = RC_NOCACHE,
535 .pc_xdrressize = ST,
536 },
537 [NFSPROC_GETATTR] = {
538 .pc_func = (svc_procfunc) nfsd_proc_getattr,
539 .pc_decode = (kxdrproc_t) nfssvc_decode_fhandle,
540 .pc_encode = (kxdrproc_t) nfssvc_encode_attrstat,
541 .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
542 .pc_argsize = sizeof(struct nfsd_fhandle),
543 .pc_ressize = sizeof(struct nfsd_attrstat),
544 .pc_cachetype = RC_NOCACHE,
545 .pc_xdrressize = ST+AT,
546 },
547 [NFSPROC_SETATTR] = {
548 .pc_func = (svc_procfunc) nfsd_proc_setattr,
549 .pc_decode = (kxdrproc_t) nfssvc_decode_sattrargs,
550 .pc_encode = (kxdrproc_t) nfssvc_encode_attrstat,
551 .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
552 .pc_argsize = sizeof(struct nfsd_sattrargs),
553 .pc_ressize = sizeof(struct nfsd_attrstat),
554 .pc_cachetype = RC_REPLBUFF,
555 .pc_xdrressize = ST+AT,
556 },
557 [NFSPROC_ROOT] = {
558 .pc_decode = (kxdrproc_t) nfssvc_decode_void,
559 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
560 .pc_argsize = sizeof(struct nfsd_void),
561 .pc_ressize = sizeof(struct nfsd_void),
562 .pc_cachetype = RC_NOCACHE,
563 .pc_xdrressize = ST,
564 },
565 [NFSPROC_LOOKUP] = {
566 .pc_func = (svc_procfunc) nfsd_proc_lookup,
567 .pc_decode = (kxdrproc_t) nfssvc_decode_diropargs,
568 .pc_encode = (kxdrproc_t) nfssvc_encode_diropres,
569 .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
570 .pc_argsize = sizeof(struct nfsd_diropargs),
571 .pc_ressize = sizeof(struct nfsd_diropres),
572 .pc_cachetype = RC_NOCACHE,
573 .pc_xdrressize = ST+FH+AT,
574 },
575 [NFSPROC_READLINK] = {
576 .pc_func = (svc_procfunc) nfsd_proc_readlink,
577 .pc_decode = (kxdrproc_t) nfssvc_decode_readlinkargs,
578 .pc_encode = (kxdrproc_t) nfssvc_encode_readlinkres,
579 .pc_argsize = sizeof(struct nfsd_readlinkargs),
580 .pc_ressize = sizeof(struct nfsd_readlinkres),
581 .pc_cachetype = RC_NOCACHE,
582 .pc_xdrressize = ST+1+NFS_MAXPATHLEN/4,
583 },
584 [NFSPROC_READ] = {
585 .pc_func = (svc_procfunc) nfsd_proc_read,
586 .pc_decode = (kxdrproc_t) nfssvc_decode_readargs,
587 .pc_encode = (kxdrproc_t) nfssvc_encode_readres,
588 .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
589 .pc_argsize = sizeof(struct nfsd_readargs),
590 .pc_ressize = sizeof(struct nfsd_readres),
591 .pc_cachetype = RC_NOCACHE,
592 .pc_xdrressize = ST+AT+1+NFSSVC_MAXBLKSIZE_V2/4,
593 },
594 [NFSPROC_WRITECACHE] = {
595 .pc_decode = (kxdrproc_t) nfssvc_decode_void,
596 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
597 .pc_argsize = sizeof(struct nfsd_void),
598 .pc_ressize = sizeof(struct nfsd_void),
599 .pc_cachetype = RC_NOCACHE,
600 .pc_xdrressize = ST,
601 },
602 [NFSPROC_WRITE] = {
603 .pc_func = (svc_procfunc) nfsd_proc_write,
604 .pc_decode = (kxdrproc_t) nfssvc_decode_writeargs,
605 .pc_encode = (kxdrproc_t) nfssvc_encode_attrstat,
606 .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
607 .pc_argsize = sizeof(struct nfsd_writeargs),
608 .pc_ressize = sizeof(struct nfsd_attrstat),
609 .pc_cachetype = RC_REPLBUFF,
610 .pc_xdrressize = ST+AT,
611 },
612 [NFSPROC_CREATE] = {
613 .pc_func = (svc_procfunc) nfsd_proc_create,
614 .pc_decode = (kxdrproc_t) nfssvc_decode_createargs,
615 .pc_encode = (kxdrproc_t) nfssvc_encode_diropres,
616 .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
617 .pc_argsize = sizeof(struct nfsd_createargs),
618 .pc_ressize = sizeof(struct nfsd_diropres),
619 .pc_cachetype = RC_REPLBUFF,
620 .pc_xdrressize = ST+FH+AT,
621 },
622 [NFSPROC_REMOVE] = {
623 .pc_func = (svc_procfunc) nfsd_proc_remove,
624 .pc_decode = (kxdrproc_t) nfssvc_decode_diropargs,
625 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
626 .pc_argsize = sizeof(struct nfsd_diropargs),
627 .pc_ressize = sizeof(struct nfsd_void),
628 .pc_cachetype = RC_REPLSTAT,
629 .pc_xdrressize = ST,
630 },
631 [NFSPROC_RENAME] = {
632 .pc_func = (svc_procfunc) nfsd_proc_rename,
633 .pc_decode = (kxdrproc_t) nfssvc_decode_renameargs,
634 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
635 .pc_argsize = sizeof(struct nfsd_renameargs),
636 .pc_ressize = sizeof(struct nfsd_void),
637 .pc_cachetype = RC_REPLSTAT,
638 .pc_xdrressize = ST,
639 },
640 [NFSPROC_LINK] = {
641 .pc_func = (svc_procfunc) nfsd_proc_link,
642 .pc_decode = (kxdrproc_t) nfssvc_decode_linkargs,
643 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
644 .pc_argsize = sizeof(struct nfsd_linkargs),
645 .pc_ressize = sizeof(struct nfsd_void),
646 .pc_cachetype = RC_REPLSTAT,
647 .pc_xdrressize = ST,
648 },
649 [NFSPROC_SYMLINK] = {
650 .pc_func = (svc_procfunc) nfsd_proc_symlink,
651 .pc_decode = (kxdrproc_t) nfssvc_decode_symlinkargs,
652 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
653 .pc_argsize = sizeof(struct nfsd_symlinkargs),
654 .pc_ressize = sizeof(struct nfsd_void),
655 .pc_cachetype = RC_REPLSTAT,
656 .pc_xdrressize = ST,
657 },
658 [NFSPROC_MKDIR] = {
659 .pc_func = (svc_procfunc) nfsd_proc_mkdir,
660 .pc_decode = (kxdrproc_t) nfssvc_decode_createargs,
661 .pc_encode = (kxdrproc_t) nfssvc_encode_diropres,
662 .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
663 .pc_argsize = sizeof(struct nfsd_createargs),
664 .pc_ressize = sizeof(struct nfsd_diropres),
665 .pc_cachetype = RC_REPLBUFF,
666 .pc_xdrressize = ST+FH+AT,
667 },
668 [NFSPROC_RMDIR] = {
669 .pc_func = (svc_procfunc) nfsd_proc_rmdir,
670 .pc_decode = (kxdrproc_t) nfssvc_decode_diropargs,
671 .pc_encode = (kxdrproc_t) nfssvc_encode_void,
672 .pc_argsize = sizeof(struct nfsd_diropargs),
673 .pc_ressize = sizeof(struct nfsd_void),
674 .pc_cachetype = RC_REPLSTAT,
675 .pc_xdrressize = ST,
676 },
677 [NFSPROC_READDIR] = {
678 .pc_func = (svc_procfunc) nfsd_proc_readdir,
679 .pc_decode = (kxdrproc_t) nfssvc_decode_readdirargs,
680 .pc_encode = (kxdrproc_t) nfssvc_encode_readdirres,
681 .pc_argsize = sizeof(struct nfsd_readdirargs),
682 .pc_ressize = sizeof(struct nfsd_readdirres),
683 .pc_cachetype = RC_NOCACHE,
684 },
685 [NFSPROC_STATFS] = {
686 .pc_func = (svc_procfunc) nfsd_proc_statfs,
687 .pc_decode = (kxdrproc_t) nfssvc_decode_fhandle,
688 .pc_encode = (kxdrproc_t) nfssvc_encode_statfsres,
689 .pc_argsize = sizeof(struct nfsd_fhandle),
690 .pc_ressize = sizeof(struct nfsd_statfsres),
691 .pc_cachetype = RC_NOCACHE,
692 .pc_xdrressize = ST+5,
693 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694};
695
696
697struct svc_version nfsd_version2 = {
698 .vs_vers = 2,
699 .vs_nproc = 18,
700 .vs_proc = nfsd_procedures2,
701 .vs_dispatch = nfsd_dispatch,
702 .vs_xdrsize = NFS2_SVC_XDRSIZE,
703};
704
705/*
706 * Map errnos to NFS errnos.
707 */
Al Viro63f10312006-10-19 23:28:54 -0700708__be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700709nfserrno (int errno)
710{
711 static struct {
Al Viro63f10312006-10-19 23:28:54 -0700712 __be32 nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713 int syserr;
714 } nfs_errtbl[] = {
715 { nfs_ok, 0 },
716 { nfserr_perm, -EPERM },
717 { nfserr_noent, -ENOENT },
718 { nfserr_io, -EIO },
719 { nfserr_nxio, -ENXIO },
720 { nfserr_acces, -EACCES },
721 { nfserr_exist, -EEXIST },
722 { nfserr_xdev, -EXDEV },
723 { nfserr_mlink, -EMLINK },
724 { nfserr_nodev, -ENODEV },
725 { nfserr_notdir, -ENOTDIR },
726 { nfserr_isdir, -EISDIR },
727 { nfserr_inval, -EINVAL },
728 { nfserr_fbig, -EFBIG },
729 { nfserr_nospc, -ENOSPC },
730 { nfserr_rofs, -EROFS },
731 { nfserr_mlink, -EMLINK },
732 { nfserr_nametoolong, -ENAMETOOLONG },
733 { nfserr_notempty, -ENOTEMPTY },
734#ifdef EDQUOT
735 { nfserr_dquot, -EDQUOT },
736#endif
737 { nfserr_stale, -ESTALE },
738 { nfserr_jukebox, -ETIMEDOUT },
NeilBrown599eb302008-06-19 10:11:09 +1000739 { nfserr_jukebox, -ERESTARTSYS },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740 { nfserr_dropit, -EAGAIN },
741 { nfserr_dropit, -ENOMEM },
742 { nfserr_badname, -ESRCH },
743 { nfserr_io, -ETXTBSY },
Andreas Gruenbachera838cc42005-06-22 17:16:24 +0000744 { nfserr_notsupp, -EOPNOTSUPP },
Dean Hildebrandb7aeda42008-12-15 19:40:15 +0200745 { nfserr_toosmall, -ETOOSMALL },
J. Bruce Fieldsf39bde22009-09-27 14:41:43 -0400746 { nfserr_serverfault, -ESERVERFAULT },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700747 };
748 int i;
749
Al Viro63f10312006-10-19 23:28:54 -0700750 for (i = 0; i < ARRAY_SIZE(nfs_errtbl); i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751 if (nfs_errtbl[i].syserr == errno)
752 return nfs_errtbl[i].nfserr;
753 }
754 printk (KERN_INFO "nfsd: non-standard errno: %d\n", errno);
755 return nfserr_io;
756}
757