[net-next-2.6.git] / fs / nfsd / lockd.c

/*
 * linux/fs/nfsd/lockd.c
 *
 * This file contains all the stubs needed when communicating with lockd.
 * This level of indirection is necessary so we can run nfsd+lockd without
 * requiring the nfs client to be compiled in/loaded, and vice versa.
 *
 * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
 */

#include <linux/types.h>
#include <linux/fs.h>
#include <linux/file.h>
#include <linux/mount.h>
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/svc.h>
#include <linux/nfsd/nfsd.h>
#include <linux/lockd/bind.h>

#define NFSDDBG_FACILITY		NFSDDBG_LOCKD

#ifdef CONFIG_LOCKD_V4
#define nlm_stale_fh	nlm4_stale_fh
#define nlm_failed	nlm4_failed
#else
#define nlm_stale_fh	nlm_lck_denied_nolocks
#define nlm_failed	nlm_lck_denied_nolocks
#endif
/*
 * Note: we hold the dentry use count while the file is open.
 */
static __be32
nlm_fopen(struct svc_rqst *rqstp, struct nfs_fh *f, struct file **filp)
{
	__be32		nfserr;
	struct svc_fh	fh;

	/* must initialize before using! but maxsize doesn't matter */
	fh_init(&fh,0);
	fh.fh_handle.fh_size = f->size;
	memcpy((char*)&fh.fh_handle.fh_base, f->data, f->size);
	fh.fh_export = NULL;

	exp_readlock();
	nfserr = nfsd_open(rqstp, &fh, S_IFREG, NFSD_MAY_LOCK, filp);
	fh_put(&fh);
	rqstp->rq_client = NULL;
	exp_readunlock();
 	/* We return nlm error codes as nlm doesn't know
	 * about nfsd, but nfsd does know about nlm..
	 */
	switch (nfserr) {
	case nfs_ok:
		return 0;
	case nfserr_dropit:
		return nlm_drop_reply;
	case nfserr_stale:
		return nlm_stale_fh;
	default:
		return nlm_failed;
	}
}

static void
nlm_fclose(struct file *filp)
{
	fput(filp);
}

static struct nlmsvc_binding	nfsd_nlm_ops = {
	.fopen		= nlm_fopen,		/* open file for locking */
	.fclose		= nlm_fclose,		/* close file */
};

void
nfsd_lockd_init(void)
{
	dprintk("nfsd: initializing lockd\n");
	nlmsvc_ops = &nfsd_nlm_ops;
}

void
nfsd_lockd_shutdown(void)
{
	nlmsvc_ops = NULL;
}
Commit	Line	Data
1da177e4 LT	1	/*
	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
cc77b152 MS	22	#ifdef CONFIG_LOCKD_V4
	23	#define nlm_stale_fh nlm4_stale_fh
	24	#define nlm_failed nlm4_failed
	25	#else
	26	#define nlm_stale_fh nlm_lck_denied_nolocks
	27	#define nlm_failed nlm_lck_denied_nolocks
	28	#endif
1da177e4 LT	29	/*
	30	* Note: we hold the dentry use count while the file is open.
	31	*/
e8c5c045	32	static __be32
1da177e4 LT	33	nlm_fopen(struct svc_rqst rqstp, struct nfs_fh f, struct file **filp)
1da177e4 LT	34	{
c7afef1f	35	__be32 nfserr;
1da177e4 LT	36	struct svc_fh fh;
	37
	38	/* must initialize before using! but maxsize doesn't matter */
	39	fh_init(&fh,0);
	40	fh.fh_handle.fh_size = f->size;
	41	memcpy((char*)&fh.fh_handle.fh_base, f->data, f->size);
	42	fh.fh_export = NULL;
	43
	44	exp_readlock();
8837abca	45	nfserr = nfsd_open(rqstp, &fh, S_IFREG, NFSD_MAY_LOCK, filp);
1da177e4 LT	46	fh_put(&fh);
	47	rqstp->rq_client = NULL;
	48	exp_readunlock();
d343fce1 N	49	/* We return nlm error codes as nlm doesn't know
d343fce1 N	50	* about nfsd, but nfsd does know about nlm..
1da177e4 LT	51	*/
	52	switch (nfserr) {
	53	case nfs_ok:
	54	return 0;
d343fce1 N	55	case nfserr_dropit:
d343fce1 N	56	return nlm_drop_reply;
1da177e4	57	case nfserr_stale:
cc77b152	58	return nlm_stale_fh;
1da177e4	59	default:
cc77b152	60	return nlm_failed;
1da177e4 LT	61	}
	62	}
	63
	64	static void
	65	nlm_fclose(struct file *filp)
	66	{
	67	fput(filp);
	68	}
	69
	70	static struct nlmsvc_binding nfsd_nlm_ops = {
	71	.fopen = nlm_fopen, /* open file for locking */
	72	.fclose = nlm_fclose, /* close file */
	73	};
	74
	75	void
	76	nfsd_lockd_init(void)
	77	{
	78	dprintk("nfsd: initializing lockd\n");
	79	nlmsvc_ops = &nfsd_nlm_ops;
	80	}
	81
	82	void
	83	nfsd_lockd_shutdown(void)
	84	{
	85	nlmsvc_ops = NULL;
	86	}