Revert "xen-netback: create a debugfs node for hash information"

This reverts commit c0c64c15.

There is no vif->ctrl_task member, so this change broke
the build.
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/xen-netback/common.h

@@ -410,8 +410,4 @@ u32 xenvif_set_hash_mapping(struct xenvif *vif, u32 gref, u32 len,
 
 void xenvif_set_skb_hash(struct xenvif *vif, struct sk_buff *skb);
 
-#ifdef CONFIG_DEBUG_FS
-void xenvif_dump_hash_info(struct xenvif *vif, struct seq_file *m);
-#endif
-
 #endif /* __XEN_NETBACK__COMMON_H__ */

drivers/net/xen-netback/hash.c

@@ -360,74 +360,6 @@ u32 xenvif_set_hash_mapping(struct xenvif *vif, u32 gref, u32 len,
 	return XEN_NETIF_CTRL_STATUS_SUCCESS;
 }
 
-#ifdef CONFIG_DEBUG_FS
-void xenvif_dump_hash_info(struct xenvif *vif, struct seq_file *m)
-{
-	unsigned int i;
-
-	switch (vif->hash.alg) {
-	case XEN_NETIF_CTRL_HASH_ALGORITHM_TOEPLITZ:
-		seq_puts(m, "Hash Algorithm: TOEPLITZ\n");
-		break;
-
-	case XEN_NETIF_CTRL_HASH_ALGORITHM_NONE:
-		seq_puts(m, "Hash Algorithm: NONE\n");
-		/* FALLTHRU */
-	default:
-		return;
-	}
-
-	if (vif->hash.flags) {
-		seq_puts(m, "\nHash Flags:\n");
-
-		if (vif->hash.flags & XEN_NETIF_CTRL_HASH_TYPE_IPV4)
-			seq_puts(m, "- IPv4\n");
-		if (vif->hash.flags & XEN_NETIF_CTRL_HASH_TYPE_IPV4_TCP)
-			seq_puts(m, "- IPv4 + TCP\n");
-		if (vif->hash.flags & XEN_NETIF_CTRL_HASH_TYPE_IPV6)
-			seq_puts(m, "- IPv6\n");
-		if (vif->hash.flags & XEN_NETIF_CTRL_HASH_TYPE_IPV6_TCP)
-			seq_puts(m, "- IPv6 + TCP\n");
-	}
-
-	seq_puts(m, "\nHash Key:\n");
-
-	for (i = 0; i < XEN_NETBK_MAX_HASH_KEY_SIZE; ) {
-		unsigned int j, n;
-
-		n = 8;
-		if (i + n >= XEN_NETBK_MAX_HASH_KEY_SIZE)
-			n = XEN_NETBK_MAX_HASH_KEY_SIZE - i;
-
-		seq_printf(m, "[%2u - %2u]: ", i, i + n - 1);
-
-		for (j = 0; j < n; j++, i++)
-			seq_printf(m, "%02x ", vif->hash.key[i]);
-
-		seq_puts(m, "\n");
-	}
-
-	if (vif->hash.size != 0) {
-		seq_puts(m, "\nHash Mapping:\n");
-
-		for (i = 0; i < vif->hash.size; ) {
-			unsigned int j, n;
-
-			n = 8;
-			if (i + n >= vif->hash.size)
-				n = vif->hash.size - i;
-
-			seq_printf(m, "[%4u - %4u]: ", i, i + n - 1);
-
-			for (j = 0; j < n; j++, i++)
-				seq_printf(m, "%4u ", vif->hash.mapping[i]);
-
-			seq_puts(m, "\n");
-		}
-	}
-}
-#endif /* CONFIG_DEBUG_FS */
-
 void xenvif_init_hash(struct xenvif *vif)
 {
 	if (xenvif_hash_cache_size == 0)

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_io_ring_open(struct inode *inode, struct file *filp)
+static int xenvif_dump_open(struct inode *inode, struct file *filp)
 {
 	int ret;
 	void *queue = NULL;
@@ -179,35 +179,13 @@ static int xenvif_io_ring_open(struct inode *inode, struct file *filp)
 
 static const struct file_operations xenvif_dbg_io_ring_ops_fops = {
 	.owner = THIS_MODULE,
-	.open = xenvif_io_ring_open,
+	.open = xenvif_dump_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;
@@ -232,17 +210,6 @@ 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",