linux-kernel - [PATCH 26/41] NFS: Add FS-Cache option bit and debug bit [ver #48]

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Message-ID: <20090403155650.28714.58686.stgit@warthog.procyon.org.uk>
Date:	Fri, 03 Apr 2009 16:56:50 +0100
From:	David Howells <dhowells@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	dhowells@...hat.com, nfsv4@...ux-nfs.org,
	linux-fsdevel@...r.kernel.org
Subject: [PATCH 26/41] NFS: Add FS-Cache option bit and debug bit [ver #48]

Add FS-Cache option bit to nfs_server struct.  This is set to indicate local
on-disk caching is enabled for a particular superblock.

Also add debug bit for local caching operations.

Signed-off-by: David Howells <dhowells@...hat.com>
Acked-by: Steve Dickson <steved@...hat.com>
Acked-by: Trond Myklebust <Trond.Myklebust@...app.com>
Acked-by: Al Viro <viro@...iv.linux.org.uk>
Tested-by: Daire Byrne <Daire.Byrne@...mestore.com>
---

 include/linux/nfs_fs.h    |    1 +
 include/linux/nfs_fs_sb.h |    2 ++
 2 files changed, 3 insertions(+), 0 deletions(-)


diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index bde2557..fd3e7f9 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -583,6 +583,7 @@ extern void * nfs_root_data(void);
 #define NFSDBG_CALLBACK		0x0100
 #define NFSDBG_CLIENT		0x0200
 #define NFSDBG_MOUNT		0x0400
+#define NFSDBG_FSCACHE		0x0800
 #define NFSDBG_ALL		0xFFFF
 
 #ifdef __KERNEL__
diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h
index 29b1e40..a749f85 100644
--- a/include/linux/nfs_fs_sb.h
+++ b/include/linux/nfs_fs_sb.h
@@ -96,6 +96,8 @@ struct nfs_server {
 	unsigned int		acdirmin;
 	unsigned int		acdirmax;
 	unsigned int		namelen;
+	unsigned int		options;	/* extra options enabled by mount */
+#define NFS_OPTION_FSCACHE	0x00000001	/* - local caching enabled */
 
 	struct nfs_fsid		fsid;
 	__u64			maxfilesize;	/* maximum file size */

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