From 60e78d2c993e58d890596d951fff77d5965adcd6 Mon Sep 17 00:00:00 2001 From: Abhishek Kulkarni Date: Wed, 23 Sep 2009 13:00:27 -0500 Subject: 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 Signed-off-by: Eric Van Hensbergen --- fs/9p/v9fs_vfs.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'fs/9p/v9fs_vfs.h') diff --git a/fs/9p/v9fs_vfs.h b/fs/9p/v9fs_vfs.h index f0c7de78e205..3a7560e35865 100644 --- a/fs/9p/v9fs_vfs.h +++ b/fs/9p/v9fs_vfs.h @@ -44,7 +44,13 @@ extern const struct file_operations v9fs_dir_operations; extern const struct dentry_operations v9fs_dentry_operations; extern const struct dentry_operations v9fs_cached_dentry_operations; +#ifdef CONFIG_9P_FSCACHE +struct inode *v9fs_alloc_inode(struct super_block *sb); +void v9fs_destroy_inode(struct inode *inode); +#endif + struct inode *v9fs_get_inode(struct super_block *sb, int mode); +void v9fs_clear_inode(struct inode *inode); ino_t v9fs_qid2ino(struct p9_qid *qid); void v9fs_stat2inode(struct p9_wstat *, struct inode *, struct super_block *); int v9fs_dir_release(struct inode *inode, struct file *filp); -- cgit v1.2.2