fuse: handle directories in fuse_try_prune_one_inode()

When the inode that has to be pruned is a directory
call shrink_dcache_parent() before trying to prune.

This will try to free all related dcache entries.

Signed-off-by: Horst Birthelmer <hbirthelmer@ddn.com>

Author: hbirth

fs/fuse/inode.c

@@ -627,7 +627,7 @@ int fuse_reverse_inval_inode(struct fuse_conn *fc, u64 nodeid,
 
 	fi->attr_version = atomic64_inc_return(&fc->attr_version);
 	spin_unlock(&fi->lock);
-	
+
 	if (fc->inval_inode_entries)
 		fuse_invalidate_inode_entry(inode);
 	else if (fc->expire_inode_entries)
@@ -662,10 +662,20 @@ int fuse_reverse_inval_inode(struct fuse_conn *fc, u64 nodeid,
 void fuse_try_prune_one_inode(struct fuse_conn *fc, u64 nodeid)
 {
 	struct inode *inode;
+	struct dentry *dentry;
 
-	inode = fuse_ilookup(fc, nodeid,  NULL);
+	inode = fuse_ilookup(fc, nodeid, NULL);
 	if (!inode)
 		return;
+
+	if (S_ISDIR(inode->i_mode)) {
+		dentry = d_find_alias(inode);
+		if (dentry) {
+			shrink_dcache_parent(dentry);
+			dput(dentry);
+		}
+	}
+
 	d_prune_aliases(inode);
 	iput(inode);
 }