[linux-2.6-block.git] / 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/file.h>
#include <linux/lockd/bind.h>
#include "nfsd.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);
	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	1	/*
1da177e4 LT	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
1da177e4	9	#include <linux/file.h>
1da177e4	10	#include <linux/lockd/bind.h>
9a74af21	11	#include "nfsd.h"
0a3adade	12	#include "vfs.h"
1da177e4 LT	13
	14	#define NFSDDBG_FACILITY NFSDDBG_LOCKD
	15
cc77b152 MS	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
1da177e4 LT	23	/*
	24	* Note: we hold the dentry use count while the file is open.
	25	*/
e8c5c045	26	static __be32
1da177e4 LT	27	nlm_fopen(struct svc_rqst rqstp, struct nfs_fh f, struct file **filp)
1da177e4 LT	28	{
c7afef1f	29	__be32 nfserr;
1da177e4 LT	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();
8837abca	39	nfserr = nfsd_open(rqstp, &fh, S_IFREG, NFSD_MAY_LOCK, filp);
1da177e4	40	fh_put(&fh);
1da177e4	41	exp_readunlock();
d343fce1 N	42	/* We return nlm error codes as nlm doesn't know
d343fce1 N	43	* about nfsd, but nfsd does know about nlm..
1da177e4 LT	44	*/
	45	switch (nfserr) {
	46	case nfs_ok:
	47	return 0;
d343fce1 N	48	case nfserr_dropit:
d343fce1 N	49	return nlm_drop_reply;
1da177e4	50	case nfserr_stale:
cc77b152	51	return nlm_stale_fh;
1da177e4	52	default:
cc77b152	53	return nlm_failed;
1da177e4 LT	54	}
	55	}
	56
	57	static void
	58	nlm_fclose(struct file *filp)
	59	{
	60	fput(filp);
	61	}
	62
	63	static struct nlmsvc_binding nfsd_nlm_ops = {
	64	.fopen = nlm_fopen, /* open file for locking */
	65	.fclose = nlm_fclose, /* close file */
	66	};
	67
	68	void
	69	nfsd_lockd_init(void)
	70	{
	71	dprintk("nfsd: initializing lockd\n");
	72	nlmsvc_ops = &nfsd_nlm_ops;
	73	}
	74
	75	void
	76	nfsd_lockd_shutdown(void)
	77	{
	78	nlmsvc_ops = NULL;
	79	}