add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/net/batman-adv/icmp_socket.c
..
..
@@ -1,19 +1,7 @@
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 // SPDX-License-Identifier: GPL-2.0
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-/* Copyright (C) 2007-2018  B.A.T.M.A.N. contributors:
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+/* Copyright (C) 2007-2020  B.A.T.M.A.N. contributors:
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  *
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  * Marek Lindner
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- *
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- * This program is free software; you can redistribute it and/or
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- * modify it under the terms of version 2 of the GNU General Public
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- * License as published by the Free Software Foundation.
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- *
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- * This program is distributed in the hope that it will be useful, but
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- * WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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- * General Public License for more details.
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- *
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- * You should have received a copy of the GNU General Public License
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- * along with this program; if not, see <http://www.gnu.org/licenses/>.
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  */
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6
 
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 #include "icmp_socket.h"
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@@ -47,6 +35,7 @@
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 #include <linux/wait.h>
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 #include <uapi/linux/batadv_packet.h>
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+#include "debugfs.h"
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 #include "hard-interface.h"
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 #include "log.h"
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 #include "originator.h"
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@@ -74,7 +63,9 @@
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 	if (!try_module_get(THIS_MODULE))
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 		return -EBUSY;
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-	nonseekable_open(inode, file);
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+	batadv_debugfs_deprecated(file, "");
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+
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+	stream_open(inode, file);
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 	socket_client = kmalloc(sizeof(*socket_client), GFP_KERNEL);
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 	if (!socket_client) {
..
..
@@ -143,9 +134,6 @@
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 	if (!buf || count < sizeof(struct batadv_icmp_packet))
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 		return -EINVAL;
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-
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-	if (!access_ok(VERIFY_WRITE, buf, count))
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-		return -EFAULT;
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 	error = wait_event_interruptible(socket_client->queue_wait,
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 					 socket_client->queue_len);
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@@ -323,25 +311,11 @@
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 /**
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  * batadv_socket_setup() - Create debugfs "socket" file
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  * @bat_priv: the bat priv with all the soft interface information
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- *
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- * Return: 0 on success or negative error number in case of failure
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  */
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-int batadv_socket_setup(struct batadv_priv *bat_priv)
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+void batadv_socket_setup(struct batadv_priv *bat_priv)
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 {
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-	struct dentry *d;
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-
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-	if (!bat_priv->debug_dir)
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-		goto err;
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-
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-	d = debugfs_create_file(BATADV_ICMP_SOCKET, 0600, bat_priv->debug_dir,
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-				bat_priv, &batadv_fops);
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-	if (!d)
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-		goto err;
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-
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-	return 0;
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-
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-err:
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-	return -ENOMEM;
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+	debugfs_create_file(BATADV_ICMP_SOCKET, 0600, bat_priv->debug_dir,
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+			    bat_priv, &batadv_fops);
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 }
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 /**