blob: 221acd1f11f66c1fd63474287a79530611d690be [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * linux/fs/nfsd/lockd.c
3 *
4 * This file contains all the stubs needed when communicating with lockd.
5 * This level of indirection is necessary so we can run nfsd+lockd without
6 * requiring the nfs client to be compiled in/loaded, and vice versa.
7 *
8 * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
9 */
10
11#include <linux/types.h>
12#include <linux/fs.h>
13#include <linux/file.h>
14#include <linux/mount.h>
15#include <linux/sunrpc/clnt.h>
16#include <linux/sunrpc/svc.h>
17#include <linux/nfsd/nfsd.h>
18#include <linux/lockd/bind.h>
19
20#define NFSDDBG_FACILITY NFSDDBG_LOCKD
21
22/*
23 * Note: we hold the dentry use count while the file is open.
24 */
Al Viroe8c5c042006-12-13 00:35:03 -080025static __be32
Linus Torvalds1da177e2005-04-16 15:20:36 -070026nlm_fopen(struct svc_rqst *rqstp, struct nfs_fh *f, struct file **filp)
27{
Al Viroc7afef12006-10-19 23:29:02 -070028 __be32 nfserr;
Linus Torvalds1da177e2005-04-16 15:20:36 -070029 struct svc_fh fh;
30
31 /* must initialize before using! but maxsize doesn't matter */
32 fh_init(&fh,0);
33 fh.fh_handle.fh_size = f->size;
34 memcpy((char*)&fh.fh_handle.fh_base, f->data, f->size);
35 fh.fh_export = NULL;
36
37 exp_readlock();
38 nfserr = nfsd_open(rqstp, &fh, S_IFREG, MAY_LOCK, filp);
39 fh_put(&fh);
40 rqstp->rq_client = NULL;
41 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;
50#ifdef CONFIG_LOCKD_V4
Linus Torvalds1da177e2005-04-16 15:20:36 -070051 case nfserr_stale:
NeilBrownd343fce2006-10-17 00:10:18 -070052 return nlm4_stale_fh;
53#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070054 default:
NeilBrownd343fce2006-10-17 00:10:18 -070055 return nlm_lck_denied;
Linus Torvalds1da177e2005-04-16 15:20:36 -070056 }
57}
58
59static void
60nlm_fclose(struct file *filp)
61{
62 fput(filp);
63}
64
65static struct nlmsvc_binding nfsd_nlm_ops = {
66 .fopen = nlm_fopen, /* open file for locking */
67 .fclose = nlm_fclose, /* close file */
68};
69
70void
71nfsd_lockd_init(void)
72{
73 dprintk("nfsd: initializing lockd\n");
74 nlmsvc_ops = &nfsd_nlm_ops;
75}
76
77void
78nfsd_lockd_shutdown(void)
79{
80 nlmsvc_ops = NULL;
81}