blob: b8680738f5884e7ee94d46c95c89ff68faa9a95f [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;
Al Viro3dadecc2013-01-24 02:18:08 -050029 return fh_getattr(&resp->fh, &resp->stat);
David Shaw846f2fc2006-01-18 17:43:51 -080030}
Al Viroc4d987b2006-10-19 23:29:00 -070031static __be32
32nfsd_return_dirop(__be32 err, struct nfsd_diropres *resp)
David Shaw846f2fc2006-01-18 17:43:51 -080033{
34 if (err) return err;
Al Viro3dadecc2013-01-24 02:18:08 -050035 return fh_getattr(&resp->fh, &resp->stat);
David Shaw846f2fc2006-01-18 17:43:51 -080036}
Linus Torvalds1da177e2005-04-16 15:20:36 -070037/*
38 * Get a file's attributes
39 * N.B. After this call resp->fh needs an fh_put
40 */
Al Viro7111c662006-10-19 23:28:45 -070041static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -070042nfsd_proc_getattr(struct svc_rqst *rqstp, struct nfsd_fhandle *argp,
43 struct nfsd_attrstat *resp)
44{
Al Viroc4d987b2006-10-19 23:29:00 -070045 __be32 nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -070046 dprintk("nfsd: GETATTR %s\n", SVCFH_fmt(&argp->fh));
47
48 fh_copy(&resp->fh, &argp->fh);
J. Bruce Fields04716e62008-08-07 13:00:20 -040049 nfserr = fh_verify(rqstp, &resp->fh, 0,
50 NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT);
David Shaw846f2fc2006-01-18 17:43:51 -080051 return nfsd_return_attrs(nfserr, resp);
Linus Torvalds1da177e2005-04-16 15:20:36 -070052}
53
54/*
55 * Set a file's attributes
56 * N.B. After this call resp->fh needs an fh_put
57 */
Al Viro7111c662006-10-19 23:28:45 -070058static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -070059nfsd_proc_setattr(struct svc_rqst *rqstp, struct nfsd_sattrargs *argp,
60 struct nfsd_attrstat *resp)
61{
Al Viroc4d987b2006-10-19 23:29:00 -070062 __be32 nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -070063 dprintk("nfsd: SETATTR %s, valid=%x, size=%ld\n",
64 SVCFH_fmt(&argp->fh),
65 argp->attrs.ia_valid, (long) argp->attrs.ia_size);
66
67 fh_copy(&resp->fh, &argp->fh);
David Shaw846f2fc2006-01-18 17:43:51 -080068 nfserr = nfsd_setattr(rqstp, &resp->fh, &argp->attrs,0, (time_t)0);
69 return nfsd_return_attrs(nfserr, resp);
Linus Torvalds1da177e2005-04-16 15:20:36 -070070}
71
72/*
73 * Look up a path name component
74 * Note: the dentry in the resp->fh may be negative if the file
75 * doesn't exist yet.
76 * N.B. After this call resp->fh needs an fh_put
77 */
Al Viro7111c662006-10-19 23:28:45 -070078static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -070079nfsd_proc_lookup(struct svc_rqst *rqstp, struct nfsd_diropargs *argp,
80 struct nfsd_diropres *resp)
81{
Al Viroc4d987b2006-10-19 23:29:00 -070082 __be32 nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -070083
84 dprintk("nfsd: LOOKUP %s %.*s\n",
85 SVCFH_fmt(&argp->fh), argp->len, argp->name);
86
87 fh_init(&resp->fh, NFS_FHSIZE);
88 nfserr = nfsd_lookup(rqstp, &argp->fh, argp->name, argp->len,
89 &resp->fh);
90
91 fh_put(&argp->fh);
David Shaw846f2fc2006-01-18 17:43:51 -080092 return nfsd_return_dirop(nfserr, resp);
Linus Torvalds1da177e2005-04-16 15:20:36 -070093}
94
95/*
96 * Read a symlink.
97 */
Al Viro7111c662006-10-19 23:28:45 -070098static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -070099nfsd_proc_readlink(struct svc_rqst *rqstp, struct nfsd_readlinkargs *argp,
100 struct nfsd_readlinkres *resp)
101{
Al Viroc4d987b2006-10-19 23:29:00 -0700102 __be32 nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103
104 dprintk("nfsd: READLINK %s\n", SVCFH_fmt(&argp->fh));
105
106 /* Read the symlink. */
107 resp->len = NFS_MAXPATHLEN;
108 nfserr = nfsd_readlink(rqstp, &argp->fh, argp->buffer, &resp->len);
109
110 fh_put(&argp->fh);
111 return nfserr;
112}
113
114/*
115 * Read a portion of a file.
116 * N.B. After this call resp->fh needs an fh_put
117 */
Al Viro7111c662006-10-19 23:28:45 -0700118static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119nfsd_proc_read(struct svc_rqst *rqstp, struct nfsd_readargs *argp,
120 struct nfsd_readres *resp)
121{
Al Viroc4d987b2006-10-19 23:29:00 -0700122 __be32 nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123
124 dprintk("nfsd: READ %s %d bytes at %d\n",
125 SVCFH_fmt(&argp->fh),
126 argp->count, argp->offset);
127
128 /* Obtain buffer pointer for payload. 19 is 1 word for
129 * status, 17 words for fattr, and 1 word for the byte count.
130 */
131
Greg Banks7adae482006-10-04 02:15:47 -0700132 if (NFSSVC_MAXBLKSIZE_V2 < argp->count) {
Chuck Leverad06e4b2007-02-12 00:53:32 -0800133 char buf[RPC_MAX_ADDRBUFLEN];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134 printk(KERN_NOTICE
Chuck Leverad06e4b2007-02-12 00:53:32 -0800135 "oversized read request from %s (%d bytes)\n",
136 svc_print_addr(rqstp, buf, sizeof(buf)),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137 argp->count);
Greg Banks7adae482006-10-04 02:15:47 -0700138 argp->count = NFSSVC_MAXBLKSIZE_V2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139 }
Jeff Laytoncd123012007-05-09 02:34:50 -0700140 svc_reserve_auth(rqstp, (19<<2) + argp->count + 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141
142 resp->count = argp->count;
J. Bruce Fields039a87c2010-07-30 11:33:32 -0400143 nfserr = nfsd_read(rqstp, fh_copy(&resp->fh, &argp->fh),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144 argp->offset,
NeilBrown3cc03b12006-10-04 02:15:47 -0700145 rqstp->rq_vec, argp->vlen,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146 &resp->count);
147
David Shaw846f2fc2006-01-18 17:43:51 -0800148 if (nfserr) return nfserr;
Al Viro3dadecc2013-01-24 02:18:08 -0500149 return fh_getattr(&resp->fh, &resp->stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150}
151
152/*
153 * Write data to a file
154 * N.B. After this call resp->fh needs an fh_put
155 */
Al Viro7111c662006-10-19 23:28:45 -0700156static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157nfsd_proc_write(struct svc_rqst *rqstp, struct nfsd_writeargs *argp,
158 struct nfsd_attrstat *resp)
159{
Al Viroc4d987b2006-10-19 23:29:00 -0700160 __be32 nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161 int stable = 1;
David Shaw31dec252009-03-05 20:16:14 -0500162 unsigned long cnt = argp->len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163
164 dprintk("nfsd: WRITE %s %d bytes at %d\n",
165 SVCFH_fmt(&argp->fh),
166 argp->len, argp->offset);
167
168 nfserr = nfsd_write(rqstp, fh_copy(&resp->fh, &argp->fh), NULL,
169 argp->offset,
NeilBrown3cc03b12006-10-04 02:15:47 -0700170 rqstp->rq_vec, argp->vlen,
David Shaw31dec252009-03-05 20:16:14 -0500171 &cnt,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172 &stable);
David Shaw846f2fc2006-01-18 17:43:51 -0800173 return nfsd_return_attrs(nfserr, resp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174}
175
176/*
177 * CREATE processing is complicated. The keyword here is `overloaded.'
178 * The parent directory is kept locked between the check for existence
179 * and the actual create() call in compliance with VFS protocols.
180 * N.B. After this call _both_ argp->fh and resp->fh need an fh_put
181 */
Al Viro7111c662006-10-19 23:28:45 -0700182static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183nfsd_proc_create(struct svc_rqst *rqstp, struct nfsd_createargs *argp,
184 struct nfsd_diropres *resp)
185{
186 svc_fh *dirfhp = &argp->fh;
187 svc_fh *newfhp = &resp->fh;
188 struct iattr *attr = &argp->attrs;
189 struct inode *inode;
190 struct dentry *dchild;
Al Viroc4d987b2006-10-19 23:29:00 -0700191 int type, mode;
192 __be32 nfserr;
Jan Kara4a55c102012-06-12 16:20:33 +0200193 int hosterr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194 dev_t rdev = 0, wanted = new_decode_dev(attr->ia_size);
195
196 dprintk("nfsd: CREATE %s %.*s\n",
197 SVCFH_fmt(dirfhp), argp->len, argp->name);
198
199 /* First verify the parent file handle */
Miklos Szeredi8837abc2008-06-16 13:20:29 +0200200 nfserr = fh_verify(rqstp, dirfhp, S_IFDIR, NFSD_MAY_EXEC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 if (nfserr)
202 goto done; /* must fh_put dirfhp even on error */
203
Miklos Szeredi8837abc2008-06-16 13:20:29 +0200204 /* Check for NFSD_MAY_WRITE in nfsd_create if necessary */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205
206 nfserr = nfserr_acces;
207 if (!argp->len)
208 goto done;
209 nfserr = nfserr_exist;
210 if (isdotent(argp->name, argp->len))
211 goto done;
Jan Kara4a55c102012-06-12 16:20:33 +0200212 hosterr = fh_want_write(dirfhp);
213 if (hosterr) {
214 nfserr = nfserrno(hosterr);
215 goto done;
216 }
217
NeilBrown7ed94292006-10-04 02:15:43 -0700218 fh_lock_nested(dirfhp, I_MUTEX_PARENT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 dchild = lookup_one_len(argp->name, dirfhp->fh_dentry, argp->len);
220 if (IS_ERR(dchild)) {
221 nfserr = nfserrno(PTR_ERR(dchild));
222 goto out_unlock;
223 }
224 fh_init(newfhp, NFS_FHSIZE);
225 nfserr = fh_compose(newfhp, dirfhp->fh_export, dchild, dirfhp);
226 if (!nfserr && !dchild->d_inode)
227 nfserr = nfserr_noent;
228 dput(dchild);
229 if (nfserr) {
230 if (nfserr != nfserr_noent)
231 goto out_unlock;
232 /*
233 * If the new file handle wasn't verified, we can't tell
234 * whether the file exists or not. Time to bail ...
235 */
236 nfserr = nfserr_acces;
237 if (!newfhp->fh_dentry) {
238 printk(KERN_WARNING
239 "nfsd_proc_create: file handle not verified\n");
240 goto out_unlock;
241 }
242 }
243
244 inode = newfhp->fh_dentry->d_inode;
245
246 /* Unfudge the mode bits */
247 if (attr->ia_valid & ATTR_MODE) {
248 type = attr->ia_mode & S_IFMT;
249 mode = attr->ia_mode & ~S_IFMT;
250 if (!type) {
251 /* no type, so if target exists, assume same as that,
252 * else assume a file */
253 if (inode) {
254 type = inode->i_mode & S_IFMT;
255 switch(type) {
256 case S_IFCHR:
257 case S_IFBLK:
258 /* reserve rdev for later checking */
259 rdev = inode->i_rdev;
260 attr->ia_valid |= ATTR_SIZE;
261
262 /* FALLTHROUGH */
263 case S_IFIFO:
264 /* this is probably a permission check..
265 * at least IRIX implements perm checking on
266 * echo thing > device-special-file-or-pipe
267 * by doing a CREATE with type==0
268 */
J. Bruce Fields0ec757d2007-07-17 04:04:48 -0700269 nfserr = nfsd_permission(rqstp,
270 newfhp->fh_export,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 newfhp->fh_dentry,
Miklos Szeredi8837abc2008-06-16 13:20:29 +0200272 NFSD_MAY_WRITE|NFSD_MAY_LOCAL_ACCESS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273 if (nfserr && nfserr != nfserr_rofs)
274 goto out_unlock;
275 }
276 } else
277 type = S_IFREG;
278 }
279 } else if (inode) {
280 type = inode->i_mode & S_IFMT;
281 mode = inode->i_mode & ~S_IFMT;
282 } else {
283 type = S_IFREG;
284 mode = 0; /* ??? */
285 }
286
287 attr->ia_valid |= ATTR_MODE;
288 attr->ia_mode = mode;
289
290 /* Special treatment for non-regular files according to the
291 * gospel of sun micro
292 */
293 if (type != S_IFREG) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294 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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 if (!rdev)
302 rdev = wanted;
303 }
304
305 /* we've used the SIZE information, so discard it */
306 attr->ia_valid &= ~ATTR_SIZE;
307
308 /* Make sure the type and device matches */
309 nfserr = nfserr_exist;
310 if (inode && type != (inode->i_mode & S_IFMT))
311 goto out_unlock;
312 }
313
314 nfserr = 0;
315 if (!inode) {
316 /* File doesn't exist. Create it and set attrs */
317 nfserr = nfsd_create(rqstp, dirfhp, argp->name, argp->len,
318 attr, type, rdev, newfhp);
319 } else if (type == S_IFREG) {
320 dprintk("nfsd: existing %s, valid=%x, size=%ld\n",
321 argp->name, attr->ia_valid, (long) attr->ia_size);
322 /* File already exists. We ignore all attributes except
323 * size, so that creat() behaves exactly like
324 * open(..., O_CREAT|O_TRUNC|O_WRONLY).
325 */
326 attr->ia_valid &= ATTR_SIZE;
327 if (attr->ia_valid)
328 nfserr = nfsd_setattr(rqstp, newfhp, attr, 0, (time_t)0);
329 }
330
331out_unlock:
332 /* We don't really need to unlock, as fh_put does it. */
333 fh_unlock(dirfhp);
Jan Kara4a55c102012-06-12 16:20:33 +0200334 fh_drop_write(dirfhp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335done:
336 fh_put(dirfhp);
David Shaw846f2fc2006-01-18 17:43:51 -0800337 return nfsd_return_dirop(nfserr, resp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338}
339
Al Viro7111c662006-10-19 23:28:45 -0700340static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341nfsd_proc_remove(struct svc_rqst *rqstp, struct nfsd_diropargs *argp,
342 void *resp)
343{
Al Viroc4d987b2006-10-19 23:29:00 -0700344 __be32 nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345
346 dprintk("nfsd: REMOVE %s %.*s\n", SVCFH_fmt(&argp->fh),
347 argp->len, argp->name);
348
349 /* Unlink. -SIFDIR means file must not be a directory */
350 nfserr = nfsd_unlink(rqstp, &argp->fh, -S_IFDIR, argp->name, argp->len);
351 fh_put(&argp->fh);
352 return nfserr;
353}
354
Al Viro7111c662006-10-19 23:28:45 -0700355static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356nfsd_proc_rename(struct svc_rqst *rqstp, struct nfsd_renameargs *argp,
357 void *resp)
358{
Al Viroc4d987b2006-10-19 23:29:00 -0700359 __be32 nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360
361 dprintk("nfsd: RENAME %s %.*s -> \n",
362 SVCFH_fmt(&argp->ffh), argp->flen, argp->fname);
363 dprintk("nfsd: -> %s %.*s\n",
364 SVCFH_fmt(&argp->tfh), argp->tlen, argp->tname);
365
366 nfserr = nfsd_rename(rqstp, &argp->ffh, argp->fname, argp->flen,
367 &argp->tfh, argp->tname, argp->tlen);
368 fh_put(&argp->ffh);
369 fh_put(&argp->tfh);
370 return nfserr;
371}
372
Al Viro7111c662006-10-19 23:28:45 -0700373static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374nfsd_proc_link(struct svc_rqst *rqstp, struct nfsd_linkargs *argp,
375 void *resp)
376{
Al Viroc4d987b2006-10-19 23:29:00 -0700377 __be32 nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378
379 dprintk("nfsd: LINK %s ->\n",
380 SVCFH_fmt(&argp->ffh));
381 dprintk("nfsd: %s %.*s\n",
382 SVCFH_fmt(&argp->tfh),
383 argp->tlen,
384 argp->tname);
385
386 nfserr = nfsd_link(rqstp, &argp->tfh, argp->tname, argp->tlen,
387 &argp->ffh);
388 fh_put(&argp->ffh);
389 fh_put(&argp->tfh);
390 return nfserr;
391}
392
Al Viro7111c662006-10-19 23:28:45 -0700393static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394nfsd_proc_symlink(struct svc_rqst *rqstp, struct nfsd_symlinkargs *argp,
395 void *resp)
396{
397 struct svc_fh newfh;
Al Viroc4d987b2006-10-19 23:29:00 -0700398 __be32 nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399
400 dprintk("nfsd: SYMLINK %s %.*s -> %.*s\n",
401 SVCFH_fmt(&argp->ffh), argp->flen, argp->fname,
402 argp->tlen, argp->tname);
403
404 fh_init(&newfh, NFS_FHSIZE);
405 /*
J. Bruce Fields0aeae332014-06-20 11:49:49 -0400406 * Crazy hack: the request fits in a page, and already-decoded
407 * attributes follow argp->tname, so it's safe to just write a
408 * null to ensure it's null-terminated:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409 */
J. Bruce Fields0aeae332014-06-20 11:49:49 -0400410 argp->tname[argp->tlen] = '\0';
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411 nfserr = nfsd_symlink(rqstp, &argp->ffh, argp->fname, argp->flen,
Kinglong Mee1e444f52014-07-01 17:48:02 +0800412 argp->tname, &newfh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413
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 Viro63f103112006-10-19 23:28:54 -0700708__be32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700709nfserrno (int errno)
710{
711 static struct {
Al Viro63f103112006-10-19 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 },
Jeff Layton62814d62014-07-03 15:15:54 -0400720 { nfserr_fbig, -E2BIG },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721 { nfserr_acces, -EACCES },
722 { nfserr_exist, -EEXIST },
723 { nfserr_xdev, -EXDEV },
724 { nfserr_mlink, -EMLINK },
725 { nfserr_nodev, -ENODEV },
726 { nfserr_notdir, -ENOTDIR },
727 { nfserr_isdir, -EISDIR },
728 { nfserr_inval, -EINVAL },
729 { nfserr_fbig, -EFBIG },
730 { nfserr_nospc, -ENOSPC },
731 { nfserr_rofs, -EROFS },
732 { nfserr_mlink, -EMLINK },
733 { nfserr_nametoolong, -ENAMETOOLONG },
734 { nfserr_notempty, -ENOTEMPTY },
735#ifdef EDQUOT
736 { nfserr_dquot, -EDQUOT },
737#endif
738 { nfserr_stale, -ESTALE },
739 { nfserr_jukebox, -ETIMEDOUT },
NeilBrown599eb302008-06-19 10:11:09 +1000740 { nfserr_jukebox, -ERESTARTSYS },
J. Bruce Fields062304a2011-01-02 22:05:33 -0500741 { nfserr_jukebox, -EAGAIN },
742 { nfserr_jukebox, -EWOULDBLOCK },
J. Bruce Fields3beb6cd2011-01-01 15:43:50 -0500743 { nfserr_jukebox, -ENOMEM },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700744 { nfserr_io, -ETXTBSY },
Andreas Gruenbachera838cc42005-06-22 17:16:24 +0000745 { nfserr_notsupp, -EOPNOTSUPP },
Dean Hildebrandb7aeda42008-12-15 19:40:15 +0200746 { nfserr_toosmall, -ETOOSMALL },
J. Bruce Fieldsf39bde22009-09-27 14:41:43 -0400747 { nfserr_serverfault, -ESERVERFAULT },
Jeff Laytonb3fbfe02014-07-29 21:37:44 -0400748 { nfserr_serverfault, -ENFILE },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749 };
750 int i;
751
Al Viro63f103112006-10-19 23:28:54 -0700752 for (i = 0; i < ARRAY_SIZE(nfs_errtbl); i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700753 if (nfs_errtbl[i].syserr == errno)
754 return nfs_errtbl[i].nfserr;
755 }
Jeff Layton62814d62014-07-03 15:15:54 -0400756 WARN(1, "nfsd: non-standard errno: %d\n", errno);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757 return nfserr_io;
758}
759