blob: 4dbb84df1b686995346cf352bc8107b5dd424028 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * linux/fs/nfs/proc.c
3 *
4 * Copyright (C) 1992, 1993, 1994 Rick Sladkey
5 *
6 * OS-independent nfs remote procedure call functions
7 *
8 * Tuned by Alan Cox <A.Cox@swansea.ac.uk> for >3K buffers
9 * so at last we can have decent(ish) throughput off a
10 * Sun server.
11 *
12 * Coding optimized and cleaned up by Florian La Roche.
13 * Note: Error returns are optimized for NFS_OK, which isn't translated via
14 * nfs_stat_to_errno(), but happens to be already the right return code.
15 *
16 * Also, the code currently doesn't check the size of the packet, when
17 * it decodes the packet.
18 *
19 * Feel free to fix it and mail me the diffs if it worries you.
20 *
21 * Completely rewritten to support the new RPC call interface;
22 * rewrote and moved the entire XDR stuff to xdr.c
23 * --Olaf Kirch June 1996
24 *
25 * The code below initializes all auto variables explicitly, otherwise
26 * it will fail to work as a module (gcc generates a memset call for an
27 * incomplete struct).
28 */
29
30#include <linux/types.h>
31#include <linux/param.h>
32#include <linux/slab.h>
33#include <linux/time.h>
34#include <linux/mm.h>
35#include <linux/utsname.h>
36#include <linux/errno.h>
37#include <linux/string.h>
38#include <linux/in.h>
39#include <linux/pagemap.h>
40#include <linux/sunrpc/clnt.h>
41#include <linux/nfs.h>
42#include <linux/nfs2.h>
43#include <linux/nfs_fs.h>
44#include <linux/nfs_page.h>
45#include <linux/lockd/bind.h>
David Howellsf7b422b2006-06-09 09:34:33 -040046#include "internal.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070047
48#define NFSDBG_FACILITY NFSDBG_PROC
49
Linus Torvalds1da177e2005-04-16 15:20:36 -070050/*
51 * Bare-bones access to getattr: this is for nfs_read_super.
52 */
53static int
54nfs_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
55 struct nfs_fsinfo *info)
56{
57 struct nfs_fattr *fattr = info->fattr;
58 struct nfs2_fsstat fsinfo;
Chuck Leverdead28d2006-03-20 13:44:23 -050059 struct rpc_message msg = {
60 .rpc_proc = &nfs_procedures[NFSPROC_GETATTR],
61 .rpc_argp = fhandle,
62 .rpc_resp = fattr,
63 };
Linus Torvalds1da177e2005-04-16 15:20:36 -070064 int status;
65
Harvey Harrison3110ff82008-05-02 13:42:44 -070066 dprintk("%s: call getattr\n", __func__);
Trond Myklebust0e574af2005-10-27 22:12:38 -040067 nfs_fattr_init(fattr);
David Howells5006a762006-08-22 20:06:12 -040068 status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0);
Harvey Harrison3110ff82008-05-02 13:42:44 -070069 dprintk("%s: reply getattr: %d\n", __func__, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -070070 if (status)
71 return status;
Harvey Harrison3110ff82008-05-02 13:42:44 -070072 dprintk("%s: call statfs\n", __func__);
Chuck Leverdead28d2006-03-20 13:44:23 -050073 msg.rpc_proc = &nfs_procedures[NFSPROC_STATFS];
74 msg.rpc_resp = &fsinfo;
David Howells5006a762006-08-22 20:06:12 -040075 status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0);
Harvey Harrison3110ff82008-05-02 13:42:44 -070076 dprintk("%s: reply statfs: %d\n", __func__, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -070077 if (status)
78 return status;
79 info->rtmax = NFS_MAXDATA;
80 info->rtpref = fsinfo.tsize;
81 info->rtmult = fsinfo.bsize;
82 info->wtmax = NFS_MAXDATA;
83 info->wtpref = fsinfo.tsize;
84 info->wtmult = fsinfo.bsize;
85 info->dtpref = fsinfo.tsize;
86 info->maxfilesize = 0x7FFFFFFF;
87 info->lease_time = 0;
88 return 0;
89}
90
91/*
92 * One function for each procedure in the NFS protocol.
93 */
94static int
95nfs_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
96 struct nfs_fattr *fattr)
97{
Chuck Leverdead28d2006-03-20 13:44:23 -050098 struct rpc_message msg = {
99 .rpc_proc = &nfs_procedures[NFSPROC_GETATTR],
100 .rpc_argp = fhandle,
101 .rpc_resp = fattr,
102 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 int status;
104
105 dprintk("NFS call getattr\n");
Trond Myklebust0e574af2005-10-27 22:12:38 -0400106 nfs_fattr_init(fattr);
Chuck Leverdead28d2006-03-20 13:44:23 -0500107 status = rpc_call_sync(server->client, &msg, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108 dprintk("NFS reply getattr: %d\n", status);
109 return status;
110}
111
112static int
113nfs_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
114 struct iattr *sattr)
115{
116 struct inode *inode = dentry->d_inode;
117 struct nfs_sattrargs arg = {
118 .fh = NFS_FH(inode),
119 .sattr = sattr
120 };
Chuck Leverdead28d2006-03-20 13:44:23 -0500121 struct rpc_message msg = {
122 .rpc_proc = &nfs_procedures[NFSPROC_SETATTR],
123 .rpc_argp = &arg,
124 .rpc_resp = fattr,
125 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126 int status;
127
Trond Myklebustcf3fff52006-01-03 09:55:53 +0100128 /* Mask out the non-modebit related stuff from attr->ia_mode */
129 sattr->ia_mode &= S_IALLUGO;
130
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131 dprintk("NFS call setattr\n");
Trond Myklebust659bfcd2008-06-10 19:39:41 -0400132 if (sattr->ia_valid & ATTR_FILE)
133 msg.rpc_cred = nfs_file_cred(sattr->ia_file);
Trond Myklebust0e574af2005-10-27 22:12:38 -0400134 nfs_fattr_init(fattr);
Chuck Leverdead28d2006-03-20 13:44:23 -0500135 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
Trond Myklebust65e43082005-08-16 11:49:44 -0400136 if (status == 0)
137 nfs_setattr_update_inode(inode, sattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 dprintk("NFS reply setattr: %d\n", status);
139 return status;
140}
141
142static int
143nfs_proc_lookup(struct inode *dir, struct qstr *name,
144 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
145{
146 struct nfs_diropargs arg = {
147 .fh = NFS_FH(dir),
148 .name = name->name,
149 .len = name->len
150 };
151 struct nfs_diropok res = {
152 .fh = fhandle,
153 .fattr = fattr
154 };
Chuck Leverdead28d2006-03-20 13:44:23 -0500155 struct rpc_message msg = {
156 .rpc_proc = &nfs_procedures[NFSPROC_LOOKUP],
157 .rpc_argp = &arg,
158 .rpc_resp = &res,
159 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160 int status;
161
162 dprintk("NFS call lookup %s\n", name->name);
Trond Myklebust0e574af2005-10-27 22:12:38 -0400163 nfs_fattr_init(fattr);
Chuck Leverdead28d2006-03-20 13:44:23 -0500164 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165 dprintk("NFS reply lookup: %d\n", status);
166 return status;
167}
168
169static int nfs_proc_readlink(struct inode *inode, struct page *page,
170 unsigned int pgbase, unsigned int pglen)
171{
172 struct nfs_readlinkargs args = {
173 .fh = NFS_FH(inode),
174 .pgbase = pgbase,
175 .pglen = pglen,
176 .pages = &page
177 };
Chuck Leverdead28d2006-03-20 13:44:23 -0500178 struct rpc_message msg = {
179 .rpc_proc = &nfs_procedures[NFSPROC_READLINK],
180 .rpc_argp = &args,
181 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 int status;
183
184 dprintk("NFS call readlink\n");
Chuck Leverdead28d2006-03-20 13:44:23 -0500185 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 dprintk("NFS reply readlink: %d\n", status);
187 return status;
188}
189
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190static int
191nfs_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
Trond Myklebust02a913a2005-10-18 14:20:17 -0700192 int flags, struct nameidata *nd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193{
194 struct nfs_fh fhandle;
195 struct nfs_fattr fattr;
196 struct nfs_createargs arg = {
197 .fh = NFS_FH(dir),
198 .name = dentry->d_name.name,
199 .len = dentry->d_name.len,
200 .sattr = sattr
201 };
202 struct nfs_diropok res = {
203 .fh = &fhandle,
204 .fattr = &fattr
205 };
Chuck Leverdead28d2006-03-20 13:44:23 -0500206 struct rpc_message msg = {
207 .rpc_proc = &nfs_procedures[NFSPROC_CREATE],
208 .rpc_argp = &arg,
209 .rpc_resp = &res,
210 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211 int status;
212
Trond Myklebust0e574af2005-10-27 22:12:38 -0400213 nfs_fattr_init(&fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 dprintk("NFS call create %s\n", dentry->d_name.name);
Chuck Leverdead28d2006-03-20 13:44:23 -0500215 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
Trond Myklebustbad2a522007-10-20 13:07:21 -0400216 nfs_mark_for_revalidate(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217 if (status == 0)
218 status = nfs_instantiate(dentry, &fhandle, &fattr);
219 dprintk("NFS reply create: %d\n", status);
220 return status;
221}
222
223/*
224 * In NFSv2, mknod is grafted onto the create call.
225 */
226static int
227nfs_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
228 dev_t rdev)
229{
230 struct nfs_fh fhandle;
231 struct nfs_fattr fattr;
232 struct nfs_createargs arg = {
233 .fh = NFS_FH(dir),
234 .name = dentry->d_name.name,
235 .len = dentry->d_name.len,
236 .sattr = sattr
237 };
238 struct nfs_diropok res = {
239 .fh = &fhandle,
240 .fattr = &fattr
241 };
Chuck Leverdead28d2006-03-20 13:44:23 -0500242 struct rpc_message msg = {
243 .rpc_proc = &nfs_procedures[NFSPROC_CREATE],
244 .rpc_argp = &arg,
245 .rpc_resp = &res,
246 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 int status, mode;
248
249 dprintk("NFS call mknod %s\n", dentry->d_name.name);
250
251 mode = sattr->ia_mode;
252 if (S_ISFIFO(mode)) {
253 sattr->ia_mode = (mode & ~S_IFMT) | S_IFCHR;
254 sattr->ia_valid &= ~ATTR_SIZE;
255 } else if (S_ISCHR(mode) || S_ISBLK(mode)) {
256 sattr->ia_valid |= ATTR_SIZE;
257 sattr->ia_size = new_encode_dev(rdev);/* get out your barf bag */
258 }
259
Trond Myklebust0e574af2005-10-27 22:12:38 -0400260 nfs_fattr_init(&fattr);
Chuck Leverdead28d2006-03-20 13:44:23 -0500261 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
Trond Myklebustdecf4912005-10-27 22:12:39 -0400262 nfs_mark_for_revalidate(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263
264 if (status == -EINVAL && S_ISFIFO(mode)) {
265 sattr->ia_mode = mode;
Trond Myklebust0e574af2005-10-27 22:12:38 -0400266 nfs_fattr_init(&fattr);
Chuck Leverdead28d2006-03-20 13:44:23 -0500267 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268 }
269 if (status == 0)
270 status = nfs_instantiate(dentry, &fhandle, &fattr);
271 dprintk("NFS reply mknod: %d\n", status);
272 return status;
273}
274
275static int
276nfs_proc_remove(struct inode *dir, struct qstr *name)
277{
Trond Myklebust4fdc17b2007-07-14 15:39:57 -0400278 struct nfs_removeargs arg = {
279 .fh = NFS_FH(dir),
280 .name.len = name->len,
281 .name.name = name->name,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282 };
Trond Myklebust4fdc17b2007-07-14 15:39:57 -0400283 struct rpc_message msg = {
284 .rpc_proc = &nfs_procedures[NFSPROC_REMOVE],
285 .rpc_argp = &arg,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286 };
287 int status;
288
289 dprintk("NFS call remove %s\n", name->name);
290 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
Trond Myklebustdecf4912005-10-27 22:12:39 -0400291 nfs_mark_for_revalidate(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292
293 dprintk("NFS reply remove: %d\n", status);
294 return status;
295}
296
Trond Myklebuste4eff1a2007-07-14 15:39:58 -0400297static void
298nfs_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 msg->rpc_proc = &nfs_procedures[NFSPROC_REMOVE];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301}
302
Trond Myklebuste4eff1a2007-07-14 15:39:58 -0400303static int nfs_proc_unlink_done(struct rpc_task *task, struct inode *dir)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304{
Trond Myklebuste4eff1a2007-07-14 15:39:58 -0400305 nfs_mark_for_revalidate(dir);
306 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307}
308
309static int
310nfs_proc_rename(struct inode *old_dir, struct qstr *old_name,
311 struct inode *new_dir, struct qstr *new_name)
312{
313 struct nfs_renameargs arg = {
314 .fromfh = NFS_FH(old_dir),
315 .fromname = old_name->name,
316 .fromlen = old_name->len,
317 .tofh = NFS_FH(new_dir),
318 .toname = new_name->name,
319 .tolen = new_name->len
320 };
Chuck Leverdead28d2006-03-20 13:44:23 -0500321 struct rpc_message msg = {
322 .rpc_proc = &nfs_procedures[NFSPROC_RENAME],
323 .rpc_argp = &arg,
324 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325 int status;
326
327 dprintk("NFS call rename %s -> %s\n", old_name->name, new_name->name);
Chuck Leverdead28d2006-03-20 13:44:23 -0500328 status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0);
Trond Myklebustdecf4912005-10-27 22:12:39 -0400329 nfs_mark_for_revalidate(old_dir);
330 nfs_mark_for_revalidate(new_dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331 dprintk("NFS reply rename: %d\n", status);
332 return status;
333}
334
335static int
336nfs_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
337{
338 struct nfs_linkargs arg = {
339 .fromfh = NFS_FH(inode),
340 .tofh = NFS_FH(dir),
341 .toname = name->name,
342 .tolen = name->len
343 };
Chuck Leverdead28d2006-03-20 13:44:23 -0500344 struct rpc_message msg = {
345 .rpc_proc = &nfs_procedures[NFSPROC_LINK],
346 .rpc_argp = &arg,
347 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348 int status;
349
350 dprintk("NFS call link %s\n", name->name);
Chuck Leverdead28d2006-03-20 13:44:23 -0500351 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
Trond Myklebust5ba7cc42005-12-03 15:20:17 -0500352 nfs_mark_for_revalidate(inode);
Trond Myklebustdecf4912005-10-27 22:12:39 -0400353 nfs_mark_for_revalidate(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354 dprintk("NFS reply link: %d\n", status);
355 return status;
356}
357
358static int
Chuck Lever94a6d752006-08-22 20:06:23 -0400359nfs_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
360 unsigned int len, struct iattr *sattr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361{
Chuck Lever4f390c12006-08-22 20:06:22 -0400362 struct nfs_fh fhandle;
363 struct nfs_fattr fattr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364 struct nfs_symlinkargs arg = {
365 .fromfh = NFS_FH(dir),
Chuck Lever4f390c12006-08-22 20:06:22 -0400366 .fromname = dentry->d_name.name,
367 .fromlen = dentry->d_name.len,
Chuck Lever94a6d752006-08-22 20:06:23 -0400368 .pages = &page,
369 .pathlen = len,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 .sattr = sattr
371 };
Chuck Leverdead28d2006-03-20 13:44:23 -0500372 struct rpc_message msg = {
373 .rpc_proc = &nfs_procedures[NFSPROC_SYMLINK],
374 .rpc_argp = &arg,
375 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 int status;
377
Chuck Lever94a6d752006-08-22 20:06:23 -0400378 if (len > NFS2_MAXPATHLEN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379 return -ENAMETOOLONG;
Chuck Lever4f390c12006-08-22 20:06:22 -0400380
Chuck Lever94a6d752006-08-22 20:06:23 -0400381 dprintk("NFS call symlink %s\n", dentry->d_name.name);
382
Chuck Leverdead28d2006-03-20 13:44:23 -0500383 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
Trond Myklebustdecf4912005-10-27 22:12:39 -0400384 nfs_mark_for_revalidate(dir);
Chuck Lever4f390c12006-08-22 20:06:22 -0400385
386 /*
387 * V2 SYMLINK requests don't return any attributes. Setting the
388 * filehandle size to zero indicates to nfs_instantiate that it
389 * should fill in the data with a LOOKUP call on the wire.
390 */
391 if (status == 0) {
392 nfs_fattr_init(&fattr);
393 fhandle.size = 0;
394 status = nfs_instantiate(dentry, &fhandle, &fattr);
395 }
396
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397 dprintk("NFS reply symlink: %d\n", status);
398 return status;
399}
400
401static int
402nfs_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
403{
404 struct nfs_fh fhandle;
405 struct nfs_fattr fattr;
406 struct nfs_createargs arg = {
407 .fh = NFS_FH(dir),
408 .name = dentry->d_name.name,
409 .len = dentry->d_name.len,
410 .sattr = sattr
411 };
412 struct nfs_diropok res = {
413 .fh = &fhandle,
414 .fattr = &fattr
415 };
Chuck Leverdead28d2006-03-20 13:44:23 -0500416 struct rpc_message msg = {
417 .rpc_proc = &nfs_procedures[NFSPROC_MKDIR],
418 .rpc_argp = &arg,
419 .rpc_resp = &res,
420 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421 int status;
422
423 dprintk("NFS call mkdir %s\n", dentry->d_name.name);
Trond Myklebust0e574af2005-10-27 22:12:38 -0400424 nfs_fattr_init(&fattr);
Chuck Leverdead28d2006-03-20 13:44:23 -0500425 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
Trond Myklebustdecf4912005-10-27 22:12:39 -0400426 nfs_mark_for_revalidate(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427 if (status == 0)
428 status = nfs_instantiate(dentry, &fhandle, &fattr);
429 dprintk("NFS reply mkdir: %d\n", status);
430 return status;
431}
432
433static int
434nfs_proc_rmdir(struct inode *dir, struct qstr *name)
435{
436 struct nfs_diropargs arg = {
437 .fh = NFS_FH(dir),
438 .name = name->name,
439 .len = name->len
440 };
Chuck Leverdead28d2006-03-20 13:44:23 -0500441 struct rpc_message msg = {
442 .rpc_proc = &nfs_procedures[NFSPROC_RMDIR],
443 .rpc_argp = &arg,
444 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445 int status;
446
447 dprintk("NFS call rmdir %s\n", name->name);
Chuck Leverdead28d2006-03-20 13:44:23 -0500448 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
Trond Myklebustdecf4912005-10-27 22:12:39 -0400449 nfs_mark_for_revalidate(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450 dprintk("NFS reply rmdir: %d\n", status);
451 return status;
452}
453
454/*
455 * The READDIR implementation is somewhat hackish - we pass a temporary
456 * buffer to the encode function, which installs it in the receive
457 * the receive iovec. The decode function just parses the reply to make
458 * sure it is syntactically correct; the entries itself are decoded
459 * from nfs_readdir by calling the decode_entry function directly.
460 */
461static int
462nfs_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
463 u64 cookie, struct page *page, unsigned int count, int plus)
464{
465 struct inode *dir = dentry->d_inode;
466 struct nfs_readdirargs arg = {
467 .fh = NFS_FH(dir),
468 .cookie = cookie,
469 .count = count,
Chuck Leverdead28d2006-03-20 13:44:23 -0500470 .pages = &page,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471 };
472 struct rpc_message msg = {
473 .rpc_proc = &nfs_procedures[NFSPROC_READDIR],
474 .rpc_argp = &arg,
Chuck Leverdead28d2006-03-20 13:44:23 -0500475 .rpc_cred = cred,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476 };
477 int status;
478
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479 dprintk("NFS call readdir %d\n", (unsigned int)cookie);
480 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
481
Trond Myklebustc4812992007-09-28 17:11:45 -0400482 nfs_invalidate_atime(dir);
483
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484 dprintk("NFS reply readdir: %d\n", status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485 return status;
486}
487
488static int
489nfs_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
490 struct nfs_fsstat *stat)
491{
492 struct nfs2_fsstat fsinfo;
Chuck Leverdead28d2006-03-20 13:44:23 -0500493 struct rpc_message msg = {
494 .rpc_proc = &nfs_procedures[NFSPROC_STATFS],
495 .rpc_argp = fhandle,
496 .rpc_resp = &fsinfo,
497 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498 int status;
499
500 dprintk("NFS call statfs\n");
Trond Myklebust0e574af2005-10-27 22:12:38 -0400501 nfs_fattr_init(stat->fattr);
Chuck Leverdead28d2006-03-20 13:44:23 -0500502 status = rpc_call_sync(server->client, &msg, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503 dprintk("NFS reply statfs: %d\n", status);
504 if (status)
505 goto out;
506 stat->tbytes = (u64)fsinfo.blocks * fsinfo.bsize;
507 stat->fbytes = (u64)fsinfo.bfree * fsinfo.bsize;
508 stat->abytes = (u64)fsinfo.bavail * fsinfo.bsize;
509 stat->tfiles = 0;
510 stat->ffiles = 0;
511 stat->afiles = 0;
512out:
513 return status;
514}
515
516static int
517nfs_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
518 struct nfs_fsinfo *info)
519{
520 struct nfs2_fsstat fsinfo;
Chuck Leverdead28d2006-03-20 13:44:23 -0500521 struct rpc_message msg = {
522 .rpc_proc = &nfs_procedures[NFSPROC_STATFS],
523 .rpc_argp = fhandle,
524 .rpc_resp = &fsinfo,
525 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526 int status;
527
528 dprintk("NFS call fsinfo\n");
Trond Myklebust0e574af2005-10-27 22:12:38 -0400529 nfs_fattr_init(info->fattr);
Chuck Leverdead28d2006-03-20 13:44:23 -0500530 status = rpc_call_sync(server->client, &msg, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531 dprintk("NFS reply fsinfo: %d\n", status);
532 if (status)
533 goto out;
534 info->rtmax = NFS_MAXDATA;
535 info->rtpref = fsinfo.tsize;
536 info->rtmult = fsinfo.bsize;
537 info->wtmax = NFS_MAXDATA;
538 info->wtpref = fsinfo.tsize;
539 info->wtmult = fsinfo.bsize;
540 info->dtpref = fsinfo.tsize;
541 info->maxfilesize = 0x7FFFFFFF;
542 info->lease_time = 0;
543out:
544 return status;
545}
546
547static int
548nfs_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
549 struct nfs_pathconf *info)
550{
551 info->max_link = 0;
552 info->max_namelen = NFS2_MAXNAMLEN;
553 return 0;
554}
555
Trond Myklebustec06c092006-03-20 13:44:27 -0500556static int nfs_read_done(struct rpc_task *task, struct nfs_read_data *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557{
Trond Myklebust8850df92007-09-28 17:20:07 -0400558 nfs_invalidate_atime(data->inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559 if (task->tk_status >= 0) {
560 nfs_refresh_inode(data->inode, data->res.fattr);
561 /* Emulate the eof flag, which isn't normally needed in NFSv2
562 * as it is guaranteed to always return the file attributes
563 */
564 if (data->args.offset + data->args.count >= data->res.fattr->size)
565 data->res.eof = 1;
566 }
Trond Myklebustec06c092006-03-20 13:44:27 -0500567 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568}
569
Trond Myklebustbdc7f022007-07-14 15:40:00 -0400570static void nfs_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571{
Trond Myklebustbdc7f022007-07-14 15:40:00 -0400572 msg->rpc_proc = &nfs_procedures[NFSPROC_READ];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573}
574
Trond Myklebust788e7a82006-03-20 13:44:27 -0500575static int nfs_write_done(struct rpc_task *task, struct nfs_write_data *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577 if (task->tk_status >= 0)
Trond Myklebust70ca8852007-09-30 15:21:24 -0400578 nfs_post_op_update_inode_force_wcc(data->inode, data->res.fattr);
Trond Myklebust788e7a82006-03-20 13:44:27 -0500579 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580}
581
Trond Myklebustbdc7f022007-07-14 15:40:00 -0400582static void nfs_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584 /* Note: NFSv2 ignores @stable and always uses NFS_FILE_SYNC */
585 data->args.stable = NFS_FILE_SYNC;
Trond Myklebustbdc7f022007-07-14 15:40:00 -0400586 msg->rpc_proc = &nfs_procedures[NFSPROC_WRITE];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587}
588
589static void
Trond Myklebustbdc7f022007-07-14 15:40:00 -0400590nfs_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591{
592 BUG();
593}
594
595static int
596nfs_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
597{
Chuck Lever1093a602008-01-11 17:09:59 -0500598 struct inode *inode = filp->f_path.dentry->d_inode;
599
600 return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601}
602
Trond Myklebust21162712008-05-20 19:34:39 -0400603/* Helper functions for NFS lock bounds checking */
604#define NFS_LOCK32_OFFSET_MAX ((__s32)0x7fffffffUL)
605static int nfs_lock_check_bounds(const struct file_lock *fl)
606{
607 __s32 start, end;
608
609 start = (__s32)fl->fl_start;
610 if ((loff_t)start != fl->fl_start)
611 goto out_einval;
612
613 if (fl->fl_end != OFFSET_MAX) {
614 end = (__s32)fl->fl_end;
615 if ((loff_t)end != fl->fl_end)
616 goto out_einval;
617 } else
618 end = NFS_LOCK32_OFFSET_MAX;
619
620 if (start < 0 || start > end)
621 goto out_einval;
622 return 0;
623out_einval:
624 return -EINVAL;
625}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700626
David Howells509de812006-08-22 20:06:11 -0400627const struct nfs_rpc_ops nfs_v2_clientops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628 .version = 2, /* protocol version */
629 .dentry_ops = &nfs_dentry_operations,
630 .dir_inode_ops = &nfs_dir_inode_operations,
J. Bruce Fields92cfc622005-06-22 17:16:22 +0000631 .file_inode_ops = &nfs_file_inode_operations,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632 .getroot = nfs_proc_get_root,
633 .getattr = nfs_proc_getattr,
634 .setattr = nfs_proc_setattr,
635 .lookup = nfs_proc_lookup,
636 .access = NULL, /* access */
637 .readlink = nfs_proc_readlink,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638 .create = nfs_proc_create,
639 .remove = nfs_proc_remove,
640 .unlink_setup = nfs_proc_unlink_setup,
641 .unlink_done = nfs_proc_unlink_done,
642 .rename = nfs_proc_rename,
643 .link = nfs_proc_link,
644 .symlink = nfs_proc_symlink,
645 .mkdir = nfs_proc_mkdir,
646 .rmdir = nfs_proc_rmdir,
647 .readdir = nfs_proc_readdir,
648 .mknod = nfs_proc_mknod,
649 .statfs = nfs_proc_statfs,
650 .fsinfo = nfs_proc_fsinfo,
651 .pathconf = nfs_proc_pathconf,
652 .decode_dirent = nfs_decode_dirent,
653 .read_setup = nfs_proc_read_setup,
Trond Myklebustec06c092006-03-20 13:44:27 -0500654 .read_done = nfs_read_done,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655 .write_setup = nfs_proc_write_setup,
Trond Myklebust788e7a82006-03-20 13:44:27 -0500656 .write_done = nfs_write_done,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657 .commit_setup = nfs_proc_commit_setup,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658 .lock = nfs_proc_lock,
Trond Myklebust21162712008-05-20 19:34:39 -0400659 .lock_check_bounds = nfs_lock_check_bounds,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660};