9p: implement optional loose read cache

[pandora-kernel.git] / fs / 9p / vfs_inode.c

diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index 5cf2213..124a085 100644 (file)
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -504,7 +504,10 @@ v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode,
                goto error;
        }
 
-       dentry->d_op = &v9fs_dentry_operations;
+       if(v9ses->cache)
+               dentry->d_op = &v9fs_cached_dentry_operations;
+       else
+               dentry->d_op = &v9fs_dentry_operations;
        d_instantiate(dentry, inode);
 
        if (nd && nd->flags & LOOKUP_OPEN) {
@@ -589,7 +592,10 @@ static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
                goto error;
        }
 
-       dentry->d_op = &v9fs_dentry_operations;
+       if(v9ses->cache)
+               dentry->d_op = &v9fs_cached_dentry_operations;
+       else
+               dentry->d_op = &v9fs_dentry_operations;
        d_instantiate(dentry, inode);
        return 0;
 
@@ -626,7 +632,6 @@ static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
 
        sb = dir->i_sb;
        v9ses = v9fs_inode2v9ses(dir);
-       dentry->d_op = &v9fs_dentry_operations;
        dirfid = v9fs_fid_lookup(dentry->d_parent);
 
        if(IS_ERR(dirfid))
@@ -697,6 +702,10 @@ static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
 
        fid->qid = fcall->params.rstat.stat.qid;
        v9fs_stat2inode(&fcall->params.rstat.stat, inode, inode->i_sb);
+       if((fid->qid.version)&&(v9ses->cache))
+               dentry->d_op = &v9fs_cached_dentry_operations;
+       else
+               dentry->d_op = &v9fs_dentry_operations;
 
        d_add(dentry, inode);
        kfree(fcall);
@@ -1184,7 +1193,10 @@ static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry,
                goto free_vfid;
        }
 
-       dentry->d_op = &v9fs_dentry_operations;
+       if(v9ses->cache)
+               dentry->d_op = &v9fs_cached_dentry_operations;
+       else
+               dentry->d_op = &v9fs_dentry_operations;
        d_instantiate(dentry, inode);
        return 0;