blob: 7c831a2731fa1210cf7b909113e12cfffc472c25 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 * This file contains all the stubs needed when communicating with lockd.
3 * This level of indirection is necessary so we can run nfsd+lockd without
4 * requiring the nfs client to be compiled in/loaded, and vice versa.
5 *
6 * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
7 */
8
Linus Torvalds1da177e2005-04-16 15:20:36 -07009#include <linux/file.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070010#include <linux/lockd/bind.h>
Boaz Harrosh9a74af22009-12-03 20:30:56 +020011#include "nfsd.h"
J. Bruce Fields0a3adad2009-11-04 18:12:35 -050012#include "vfs.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070013
14#define NFSDDBG_FACILITY NFSDDBG_LOCKD
15
Miklos Szeredicc77b152008-07-25 01:48:55 -070016#ifdef CONFIG_LOCKD_V4
17#define nlm_stale_fh nlm4_stale_fh
18#define nlm_failed nlm4_failed
19#else
20#define nlm_stale_fh nlm_lck_denied_nolocks
21#define nlm_failed nlm_lck_denied_nolocks
22#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070023/*
24 * Note: we hold the dentry use count while the file is open.
25 */
Al Viroe8c5c042006-12-13 00:35:03 -080026static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -070027nlm_fopen(struct svc_rqst *rqstp, struct nfs_fh *f, struct file **filp)
28{
Al Viroc7afef12006-10-19 23:29:02 -070029 __be32 nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -070030 struct svc_fh fh;
31
32 /* must initialize before using! but maxsize doesn't matter */
33 fh_init(&fh,0);
34 fh.fh_handle.fh_size = f->size;
35 memcpy((char*)&fh.fh_handle.fh_base, f->data, f->size);
36 fh.fh_export = NULL;
37
38 exp_readlock();
Miklos Szeredi8837abc2008-06-16 13:20:29 +020039 nfserr = nfsd_open(rqstp, &fh, S_IFREG, NFSD_MAY_LOCK, filp);
Linus Torvalds1da177e2005-04-16 15:20:36 -070040 fh_put(&fh);
Linus Torvalds1da177e2005-04-16 15:20:36 -070041 exp_readunlock();
NeilBrownd343fce2006-10-17 00:10:18 -070042 /* We return nlm error codes as nlm doesn't know
43 * about nfsd, but nfsd does know about nlm..
Linus Torvalds1da177e2005-04-16 15:20:36 -070044 */
45 switch (nfserr) {
46 case nfs_ok:
47 return 0;
NeilBrownd343fce2006-10-17 00:10:18 -070048 case nfserr_dropit:
49 return nlm_drop_reply;
Linus Torvalds1da177e2005-04-16 15:20:36 -070050 case nfserr_stale:
Miklos Szeredicc77b152008-07-25 01:48:55 -070051 return nlm_stale_fh;
Linus Torvalds1da177e2005-04-16 15:20:36 -070052 default:
Miklos Szeredicc77b152008-07-25 01:48:55 -070053 return nlm_failed;
Linus Torvalds1da177e2005-04-16 15:20:36 -070054 }
55}
56
57static void
58nlm_fclose(struct file *filp)
59{
60 fput(filp);
61}
62
63static struct nlmsvc_binding nfsd_nlm_ops = {
64 .fopen = nlm_fopen, /* open file for locking */
65 .fclose = nlm_fclose, /* close file */
Linus Torvalds1da177e2005-04-16 15:20:36 -070066};
67
68void
69nfsd_lockd_init(void)
70{
71 dprintk("nfsd: initializing lockd\n");
72 nlmsvc_ops = &nfsd_nlm_ops;
73}
74
75void
76nfsd_lockd_shutdown(void)
77{
78 nlmsvc_ops = NULL;
79}