xen-netback: create a debugfs node for hash information

[cascardo/linux.git] / drivers / net / xen-netback / xenbus.c

diff --git a/drivers/net/xen-netback/xenbus.c b/drivers/net/xen-netback/xenbus.c
index 6a31f26..bacf6e0 100644 (file)
--- a/drivers/net/xen-netback/xenbus.c
+++ b/drivers/net/xen-netback/xenbus.c
@@ -165,7 +165,7 @@ xenvif_write_io_ring(struct file *filp, const char __user *buf, size_t count,
        return count;
 }
 
-static int xenvif_dump_open(struct inode *inode, struct file *filp)
+static int xenvif_io_ring_open(struct inode *inode, struct file *filp)
 {
        int ret;
        void *queue = NULL;
@@ -179,13 +179,35 @@ static int xenvif_dump_open(struct inode *inode, struct file *filp)
 
 static const struct file_operations xenvif_dbg_io_ring_ops_fops = {
        .owner = THIS_MODULE,
-       .open = xenvif_dump_open,
+       .open = xenvif_io_ring_open,
        .read = seq_read,
        .llseek = seq_lseek,
        .release = single_release,
        .write = xenvif_write_io_ring,
 };
 
+static int xenvif_read_ctrl(struct seq_file *m, void *v)
+{
+       struct xenvif *vif = m->private;
+
+       xenvif_dump_hash_info(vif, m);
+
+       return 0;
+}
+
+static int xenvif_ctrl_open(struct inode *inode, struct file *filp)
+{
+       return single_open(filp, xenvif_read_ctrl, inode->i_private);
+}
+
+static const struct file_operations xenvif_dbg_ctrl_ops_fops = {
+       .owner = THIS_MODULE,
+       .open = xenvif_ctrl_open,
+       .read = seq_read,
+       .llseek = seq_lseek,
+       .release = single_release,
+};
+
 static void xenvif_debugfs_addif(struct xenvif *vif)
 {
        struct dentry *pfile;
@@ -210,6 +232,17 @@ static void xenvif_debugfs_addif(struct xenvif *vif)
                                pr_warn("Creation of io_ring file returned %ld!\n",
                                        PTR_ERR(pfile));
                }
+
+               if (vif->ctrl_task) {
+                       pfile = debugfs_create_file("ctrl",
+                                                   S_IRUSR,
+                                                   vif->xenvif_dbg_root,
+                                                   vif,
+                                                   &xenvif_dbg_ctrl_ops_fops);
+                       if (IS_ERR_OR_NULL(pfile))
+                               pr_warn("Creation of ctrl file returned %ld!\n",
+                                       PTR_ERR(pfile));
+               }
        } else
                netdev_warn(vif->dev,
                            "Creation of vif debugfs dir returned %ld!\n",