Commit 0cfcd405 authored by Dai Ngo's avatar Dai Ngo Committed by J. Bruce Fields
Browse files

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: 3ac3711a ("NFSD: Fix NFS server build errors")
Signed-off-by: default avatarDai Ngo <dai.ngo@oracle.com>
Signed-off-by: default avatarJ. Bruce Fields <bfields@redhat.com>
parent d48c8124

fs/nfs/nfs4file.c

+32 −6
Original line number Diff line number Diff line
@@ -9,6 +9,7 @@ 
#include <linux/falloc.h>

#include <linux/mount.h>

#include <linux/nfs_fs.h>

#include <linux/nfs_ssc.h>

#include "delegation.h"

#include "internal.h"

#include "iostat.h"
@@ -314,9 +315,8 @@ out: 
static int read_name_gen = 1;

#define SSC_READ_NAME_BODY "ssc_read_%d"



struct file *

nfs42_ssc_open(struct vfsmount *ss_mnt, struct nfs_fh *src_fh,

		nfs4_stateid *stateid)

static struct file *__nfs42_ssc_open(struct vfsmount *ss_mnt,

		struct nfs_fh *src_fh, nfs4_stateid *stateid)

{

	struct nfs_fattr fattr;

	struct file *filep, *res;
@@ -398,14 +398,40 @@ out_filep: 
	fput(filep);

	goto out_free_name;

}

EXPORT_SYMBOL_GPL(nfs42_ssc_open);

void nfs42_ssc_close(struct file *filep)



static void __nfs42_ssc_close(struct file *filep)

{

	struct nfs_open_context *ctx = nfs_file_open_context(filep);



	ctx->state->flags = 0;

}

EXPORT_SYMBOL_GPL(nfs42_ssc_close);



static const struct nfs4_ssc_client_ops nfs4_ssc_clnt_ops_tbl = {

	.sco_open = __nfs42_ssc_open,

	.sco_close = __nfs42_ssc_close,

};



/**

 * nfs42_ssc_register_ops - Wrapper to register NFS_V4 ops in nfs_common

 *

 * Return values:

 *   None

 */

void nfs42_ssc_register_ops(void)

{

	nfs42_ssc_register(&nfs4_ssc_clnt_ops_tbl);

}



/**

 * nfs42_ssc_unregister_ops - wrapper to un-register NFS_V4 ops in nfs_common

 *

 * Return values:

 *   None.

 */

void nfs42_ssc_unregister_ops(void)

{

	nfs42_ssc_unregister(&nfs4_ssc_clnt_ops_tbl);

}

#endif /* CONFIG_NFS_V4_2 */



const struct file_operations nfs4_file_operations = {

fs/nfs/nfs4super.c

+5 −0
Original line number Diff line number Diff line
@@ -7,6 +7,7 @@ 
#include <linux/mount.h>

#include <linux/nfs4_mount.h>

#include <linux/nfs_fs.h>

#include <linux/nfs_ssc.h>

#include "delegation.h"

#include "internal.h"

#include "nfs4_fs.h"
@@ -279,6 +280,9 @@ static int __init init_nfs_v4(void) 
	if (err)

		goto out2;



#ifdef CONFIG_NFS_V4_2

	nfs42_ssc_register_ops();

#endif

	register_nfs_version(&nfs_v4);

	return 0;

out2:
@@ -297,6 +301,7 @@ static void __exit exit_nfs_v4(void) 
	unregister_nfs_version(&nfs_v4);

#ifdef CONFIG_NFS_V4_2

	nfs4_xattr_cache_exit();

	nfs42_ssc_unregister_ops();

#endif

	nfs4_unregister_sysctl();

	nfs_idmap_quit();

fs/nfs/super.c

+17 −0
Original line number Diff line number Diff line
@@ -57,6 +57,7 @@ 
#include <linux/rcupdate.h>



#include <linux/uaccess.h>

#include <linux/nfs_ssc.h>



#include "nfs4_fs.h"

#include "callback.h"
@@ -85,6 +86,10 @@ const struct super_operations nfs_sops = { 
};

EXPORT_SYMBOL_GPL(nfs_sops);



static const struct nfs_ssc_client_ops nfs_ssc_clnt_ops_tbl = {

	.sco_sb_deactive = nfs_sb_deactive,

};



#if IS_ENABLED(CONFIG_NFS_V4)

static int __init register_nfs4_fs(void)

{
@@ -106,6 +111,16 @@ static void unregister_nfs4_fs(void) 
}

#endif



static void nfs_ssc_register_ops(void)

{

	nfs_ssc_register(&nfs_ssc_clnt_ops_tbl);

}



static void nfs_ssc_unregister_ops(void)

{

	nfs_ssc_unregister(&nfs_ssc_clnt_ops_tbl);

}



static struct shrinker acl_shrinker = {

	.count_objects	= nfs_access_cache_count,

	.scan_objects	= nfs_access_cache_scan,
@@ -133,6 +148,7 @@ int __init register_nfs_fs(void) 
	ret = register_shrinker(&acl_shrinker);

	if (ret < 0)

		goto error_3;

	nfs_ssc_register_ops();

	return 0;

error_3:

	nfs_unregister_sysctl();
@@ -152,6 +168,7 @@ void __exit unregister_nfs_fs(void) 
	unregister_shrinker(&acl_shrinker);

	nfs_unregister_sysctl();

	unregister_nfs4_fs();

	nfs_ssc_unregister_ops();

	unregister_filesystem(&nfs_fs_type);

}

fs/nfs_common/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -7,3 +7,4 @@ obj-$(CONFIG_NFS_ACL_SUPPORT) += nfs_acl.o 
nfs_acl-objs := nfsacl.o



obj-$(CONFIG_GRACE_PERIOD) += grace.o

obj-$(CONFIG_GRACE_PERIOD) += nfs_ssc.o

fs/nfs_common/nfs_ssc.c

0 → 100644
+94 −0
Original line number Diff line number Diff line 
// 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 */

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