linux/fs/nfs_common/nfs_ssc.c
Dai Ngo 0cfcd405e7 NFSv4.2: Fix NFS4ERR_STALE error when doing inter server copy
NFS_FS=y as dependency of CONFIG_NFSD_V4_2_INTER_SSC still have
build errors and some configs with NFSD=m to get NFS4ERR_STALE
error when doing inter server copy.

Added ops table in nfs_common for knfsd to access NFS client modules.

Fixes: 3ac3711adb ("NFSD: Fix NFS server build errors")
Signed-off-by: Dai Ngo <dai.ngo@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2020-10-21 10:31:20 -04:00

95 lines
2.1 KiB
C

// SPDX-License-Identifier: GPL-2.0-only
/*
* fs/nfs_common/nfs_ssc_comm.c
*
* Helper for knfsd's SSC to access ops in NFS client modules
*
* Author: Dai Ngo <dai.ngo@oracle.com>
*
* Copyright (c) 2020, Oracle and/or its affiliates.
*/
#include <linux/module.h>
#include <linux/fs.h>
#include <linux/nfs_ssc.h>
#include "../nfs/nfs4_fs.h"
MODULE_LICENSE("GPL");
struct nfs_ssc_client_ops_tbl nfs_ssc_client_tbl;
EXPORT_SYMBOL_GPL(nfs_ssc_client_tbl);
#ifdef CONFIG_NFS_V4_2
/**
* nfs42_ssc_register - install the NFS_V4 client ops in the nfs_ssc_client_tbl
* @ops: NFS_V4 ops to be installed
*
* Return values:
* None
*/
void nfs42_ssc_register(const struct nfs4_ssc_client_ops *ops)
{
nfs_ssc_client_tbl.ssc_nfs4_ops = ops;
}
EXPORT_SYMBOL_GPL(nfs42_ssc_register);
/**
* nfs42_ssc_unregister - uninstall the NFS_V4 client ops from
* the nfs_ssc_client_tbl
* @ops: ops to be uninstalled
*
* Return values:
* None
*/
void nfs42_ssc_unregister(const struct nfs4_ssc_client_ops *ops)
{
if (nfs_ssc_client_tbl.ssc_nfs4_ops != ops)
return;
nfs_ssc_client_tbl.ssc_nfs4_ops = NULL;
}
EXPORT_SYMBOL_GPL(nfs42_ssc_unregister);
#endif /* CONFIG_NFS_V4_2 */
#ifdef CONFIG_NFS_V4_2
/**
* nfs_ssc_register - install the NFS_FS client ops in the nfs_ssc_client_tbl
* @ops: NFS_FS ops to be installed
*
* Return values:
* None
*/
void nfs_ssc_register(const struct nfs_ssc_client_ops *ops)
{
nfs_ssc_client_tbl.ssc_nfs_ops = ops;
}
EXPORT_SYMBOL_GPL(nfs_ssc_register);
/**
* nfs_ssc_unregister - uninstall the NFS_FS client ops from
* the nfs_ssc_client_tbl
* @ops: ops to be uninstalled
*
* Return values:
* None
*/
void nfs_ssc_unregister(const struct nfs_ssc_client_ops *ops)
{
if (nfs_ssc_client_tbl.ssc_nfs_ops != ops)
return;
nfs_ssc_client_tbl.ssc_nfs_ops = NULL;
}
EXPORT_SYMBOL_GPL(nfs_ssc_unregister);
#else
void nfs_ssc_register(const struct nfs_ssc_client_ops *ops)
{
}
EXPORT_SYMBOL_GPL(nfs_ssc_register);
void nfs_ssc_unregister(const struct nfs_ssc_client_ops *ops)
{
}
EXPORT_SYMBOL_GPL(nfs_ssc_unregister);
#endif /* CONFIG_NFS_V4_2 */