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| author | Abhishek Kulkarni <adkulkar@umail.iu.edu> | 2009-09-23 13:00:27 -0500 |
|---|---|---|
| committer | Eric Van Hensbergen <ericvh@strongmad.austin.ibm.com> | 2009-09-23 13:03:46 -0500 |
| commit | 60e78d2c993e58d890596d951fff77d5965adcd6 (patch) | |
| tree | 3d53ed7254c613ef8d8de36fdceda25bc493f4f7 /fs/9p/vfs_super.c | |
| parent | 637d020a02cd734bf27acfc56c6d942cddd9eb80 (diff) | |
| download | lwn-60e78d2c993e58d890596d951fff77d5965adcd6.tar.gz lwn-60e78d2c993e58d890596d951fff77d5965adcd6.zip | |
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.c | 16 |
1 files changed, 4 insertions, 12 deletions
diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c index 8961f1a8f668..14a86448572c 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, |