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/*
* 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
/*
* Note: we hold the dentry use count while the file is open.
*/
static u32
nlm_fopen(struct svc_rqst *rqstp, struct nfs_fh *f, struct file **filp)
{
u32 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, MAY_LOCK, filp);
fh_put(&fh);
rqstp->rq_client = NULL;
exp_readunlock();
/* nlm and nfsd don't share error codes.
* we invent: 0 = no error
* 1 = stale file handle
* 2 = other error
*/
switch (nfserr) {
case nfs_ok:
return 0;
case nfserr_stale:
return 1;
default:
return 2;
}
}
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;
}
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