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authorAbhishek Kulkarni <adkulkar@umail.iu.edu>2009-09-23 13:00:27 -0500
committerEric Van Hensbergen <ericvh@strongmad.austin.ibm.com>2009-09-23 13:03:46 -0500
commit60e78d2c993e58d890596d951fff77d5965adcd6 (patch)
tree3d53ed7254c613ef8d8de36fdceda25bc493f4f7 /fs/9p/vfs_super.c
parent637d020a02cd734bf27acfc56c6d942cddd9eb80 (diff)
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9p: Add fscache support to 9p
This patch adds a persistent, read-only caching facility for 9p clients using the FS-Cache caching backend. When the fscache facility is enabled, each inode is associated with a corresponding vcookie which is an index into the FS-Cache indexing tree. The FS-Cache indexing tree is indexed at 3 levels: - session object associated with each mount. - inode/vcookie - actual data (pages) A cache tag is chosen randomly for each session. These tags can be read off /sys/fs/9p/caches and can be passed as a mount-time parameter to re-attach to the specified caching session. Signed-off-by: Abhishek Kulkarni <adkulkar@umail.iu.edu> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
Diffstat (limited to 'fs/9p/vfs_super.c')
-rw-r--r--fs/9p/vfs_super.c16
1 files changed, 4 insertions, 12 deletions
diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c
index 8961f1a8f66..14a86448572 100644
--- a/fs/9p/vfs_super.c
+++ b/fs/9p/vfs_super.c
@@ -44,21 +44,9 @@
#include "v9fs_vfs.h"
#include "fid.h"
-static void v9fs_clear_inode(struct inode *);
static const struct super_operations v9fs_super_ops;
/**
- * v9fs_clear_inode - release an inode
- * @inode: inode to release
- *
- */
-
-static void v9fs_clear_inode(struct inode *inode)
-{
- filemap_fdatawrite(inode->i_mapping);
-}
-
-/**
* v9fs_set_super - set the superblock
* @s: super block
* @data: file system specific data
@@ -220,6 +208,10 @@ v9fs_umount_begin(struct super_block *sb)
}
static const struct super_operations v9fs_super_ops = {
+#ifdef CONFIG_9P_FSCACHE
+ .alloc_inode = v9fs_alloc_inode,
+ .destroy_inode = v9fs_destroy_inode,
+#endif
.statfs = simple_statfs,
.clear_inode = v9fs_clear_inode,
.show_options = generic_show_options,