1/*
2 * 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
9#include <linux/file.h>
10#include <linux/lockd/bind.h>
11#include "nfsd.h"
12#include "vfs.h"
13
14#define NFSDDBG_FACILITY		NFSDDBG_LOCKD
15
16#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
23/*
24 * Note: we hold the dentry use count while the file is open.
25 */
26static __be32
27nlm_fopen(struct svc_rqst *rqstp, struct nfs_fh *f, struct file **filp)
28{
29	__be32		nfserr;
30	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();
39	nfserr = nfsd_open(rqstp, &fh, S_IFREG, NFSD_MAY_LOCK, filp);
40	fh_put(&fh);
41	rqstp->rq_client = NULL;
42	exp_readunlock();
43 	/* We return nlm error codes as nlm doesn't know
44	 * about nfsd, but nfsd does know about nlm..
45	 */
46	switch (nfserr) {
47	case nfs_ok:
48		return 0;
49	case nfserr_dropit:
50		return nlm_drop_reply;
51	case nfserr_stale:
52		return nlm_stale_fh;
53	default:
54		return nlm_failed;
55	}
56}
57
58static void
59nlm_fclose(struct file *filp)
60{
61	fput(filp);
62}
63
64static struct nlmsvc_binding	nfsd_nlm_ops = {
65	.fopen		= nlm_fopen,		/* open file for locking */
66	.fclose		= nlm_fclose,		/* close file */
67};
68
69void
70nfsd_lockd_init(void)
71{
72	dprintk("nfsd: initializing lockd\n");
73	nlmsvc_ops = &nfsd_nlm_ops;
74}
75
76void
77nfsd_lockd_shutdown(void)
78{
79	nlmsvc_ops = NULL;
80}
81