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Commit 7ab672ce authored by Dean Hildebrand's avatar Dean Hildebrand Committed by Trond Myklebust
Browse files

NFSv4.1: pnfs: filelayout: introduce minimal file layout driver 



This driver just registers itself and supplies trivial mount/umount functions.

Signed-off-by: default avatarDean Hildebrand <dhildebz@umich.edu>
Signed-off-by: default avatarMarc Eshel <eshel@almaden.ibm.com>
Signed-off-by: default avatarBenny Halevy <bhalevy@panasas.com>
Signed-off-by: default avatarFred Isaman <iisaman@netapp.com>
Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent 02c35fca

fs/nfs/Makefile

+3 −0
Original line number Diff line number Diff line
@@ -18,3 +18,6 @@ nfs-$(CONFIG_NFS_V4) += nfs4proc.o nfs4xdr.o nfs4state.o nfs4renewd.o \ 
nfs-$(CONFIG_NFS_V4_1)	+= pnfs.o

nfs-$(CONFIG_SYSCTL) += sysctl.o

nfs-$(CONFIG_NFS_FSCACHE) += fscache.o fscache-index.o



obj-$(CONFIG_PNFS_FILE_LAYOUT) += nfs_layout_nfsv41_files.o

nfs_layout_nfsv41_files-y := nfs4filelayout.o

fs/nfs/nfs4filelayout.c

0 → 100644
+78 −0
Original line number Diff line number Diff line 
/*

 *  Module for the pnfs nfs4 file layout driver.

 *  Defines all I/O and Policy interface operations, plus code

 *  to register itself with the pNFS client.

 *

 *  Copyright (c) 2002

 *  The Regents of the University of Michigan

 *  All Rights Reserved

 *

 *  Dean Hildebrand <dhildebz@umich.edu>

 *

 *  Permission is granted to use, copy, create derivative works, and

 *  redistribute this software and such derivative works for any purpose,

 *  so long as the name of the University of Michigan is not used in

 *  any advertising or publicity pertaining to the use or distribution

 *  of this software without specific, written prior authorization. If

 *  the above copyright notice or any other identification of the

 *  University of Michigan is included in any copy of any portion of

 *  this software, then the disclaimer below must also be included.

 *

 *  This software is provided as is, without representation or warranty

 *  of any kind either express or implied, including without limitation

 *  the implied warranties of merchantability, fitness for a particular

 *  purpose, or noninfringement.  The Regents of the University of

 *  Michigan shall not be liable for any damages, including special,

 *  indirect, incidental, or consequential damages, with respect to any

 *  claim arising out of or in connection with the use of the software,

 *  even if it has been or is hereafter advised of the possibility of

 *  such damages.

 */



#include <linux/nfs_fs.h>

#include "pnfs.h"



#define NFSDBG_FACILITY         NFSDBG_PNFS_LD



MODULE_LICENSE("GPL");

MODULE_AUTHOR("Dean Hildebrand <dhildebz@umich.edu>");

MODULE_DESCRIPTION("The NFSv4 file layout driver");



int

filelayout_initialize_mountpoint(struct nfs_server *nfss)

{

	return 0;

}



int

filelayout_uninitialize_mountpoint(struct nfs_server *nfss)

{

	dprintk("--> %s\n", __func__);



	return 0;

}



static struct pnfs_layoutdriver_type filelayout_type = {

	.id = LAYOUT_NFSV4_1_FILES,

	.name = "LAYOUT_NFSV4_1_FILES",

	.owner = THIS_MODULE,

	.initialize_mountpoint   = filelayout_initialize_mountpoint,

	.uninitialize_mountpoint = filelayout_uninitialize_mountpoint,

};



static int __init nfs4filelayout_init(void)

{

	printk(KERN_INFO "%s: NFSv4 File Layout Driver Registering...\n",

	       __func__);

	return pnfs_register_layoutdriver(&filelayout_type);

}



static void __exit nfs4filelayout_exit(void)

{

	printk(KERN_INFO "%s: NFSv4 File Layout Driver Unregistering...\n",

	       __func__);

	pnfs_unregister_layoutdriver(&filelayout_type);

}



module_init(nfs4filelayout_init);

module_exit(nfs4filelayout_exit);

include/linux/nfs_fs.h

+1 −0
Original line number Diff line number Diff line
@@ -616,6 +616,7 @@ nfs_fileid_to_ino_t(u64 fileid) 
#define NFSDBG_MOUNT		0x0400

#define NFSDBG_FSCACHE		0x0800

#define NFSDBG_PNFS		0x1000

#define NFSDBG_PNFS_LD		0x2000

#define NFSDBG_ALL		0xFFFF



#ifdef __KERNEL__