[linux.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 <[email protected]>
 */

#include <linux/file.h>
#include <linux/nfsd/nfsd.h>
#include <linux/lockd/bind.h>
#include "vfs.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 <[email protected]>
	9	*/
	10
1da177e4	11	#include <linux/file.h>
1da177e4 LT	12	#include <linux/nfsd/nfsd.h>
1da177e4 LT	13	#include <linux/lockd/bind.h>
0a3adade	14	#include "vfs.h"
1da177e4 LT	15
	16	#define NFSDDBG_FACILITY NFSDDBG_LOCKD
	17
cc77b152 MS	18	#ifdef CONFIG_LOCKD_V4
	19	#define nlm_stale_fh nlm4_stale_fh
	20	#define nlm_failed nlm4_failed
	21	#else
	22	#define nlm_stale_fh nlm_lck_denied_nolocks
	23	#define nlm_failed nlm_lck_denied_nolocks
	24	#endif
1da177e4 LT	25	/*
	26	* Note: we hold the dentry use count while the file is open.
	27	*/
e8c5c045	28	static __be32
1da177e4 LT	29	nlm_fopen(struct svc_rqst rqstp, struct nfs_fh f, struct file **filp)
1da177e4 LT	30	{
c7afef1f	31	__be32 nfserr;
1da177e4 LT	32	struct svc_fh fh;
	33
	34	/* must initialize before using! but maxsize doesn't matter */
	35	fh_init(&fh,0);
	36	fh.fh_handle.fh_size = f->size;
	37	memcpy((char*)&fh.fh_handle.fh_base, f->data, f->size);
	38	fh.fh_export = NULL;
	39
	40	exp_readlock();
8837abca	41	nfserr = nfsd_open(rqstp, &fh, S_IFREG, NFSD_MAY_LOCK, filp);
1da177e4 LT	42	fh_put(&fh);
	43	rqstp->rq_client = NULL;
	44	exp_readunlock();
d343fce1 N	45	/* We return nlm error codes as nlm doesn't know
d343fce1 N	46	* about nfsd, but nfsd does know about nlm..
1da177e4 LT	47	*/
	48	switch (nfserr) {
	49	case nfs_ok:
	50	return 0;
d343fce1 N	51	case nfserr_dropit:
d343fce1 N	52	return nlm_drop_reply;
1da177e4	53	case nfserr_stale:
cc77b152	54	return nlm_stale_fh;
1da177e4	55	default:
cc77b152	56	return nlm_failed;
1da177e4 LT	57	}
	58	}
	59
	60	static void
	61	nlm_fclose(struct file *filp)
	62	{
	63	fput(filp);
	64	}
	65
	66	static struct nlmsvc_binding nfsd_nlm_ops = {
	67	.fopen = nlm_fopen, /* open file for locking */
	68	.fclose = nlm_fclose, /* close file */
	69	};
	70
	71	void
	72	nfsd_lockd_init(void)
	73	{
	74	dprintk("nfsd: initializing lockd\n");
	75	nlmsvc_ops = &nfsd_nlm_ops;
	76	}
	77
	78	void
	79	nfsd_lockd_shutdown(void)
	80	{
	81	nlmsvc_ops = NULL;
	82	}