batman-adv: Drop deprecated debugfs support

The debugfs support in batman-adv was marked as deprecated by the commit
00caf6a2b318 ("batman-adv: Mark debugfs functionality as deprecated") and
scheduled for removal in 2021.

Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>

1 files changed, 0 insertions, 393 deletions

diff --git a/net/batman-adv/icmp_socket.c b/net/batman-adv/icmp_socket.c
deleted file mode 100644
index 56de4bf21aa5..000000000000
--- a/net/batman-adv/icmp_socket.c
+++ /dev/null
@@ -1,393 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/* Copyright (C) 2007-2020  B.A.T.M.A.N. contributors:
- *
- * Marek Lindner
- */
-
-#include "icmp_socket.h"
-#include "main.h"
-
-#include <linux/atomic.h>
-#include <linux/compiler.h>
-#include <linux/debugfs.h>
-#include <linux/errno.h>
-#include <linux/etherdevice.h>
-#include <linux/eventpoll.h>
-#include <linux/export.h>
-#include <linux/fcntl.h>
-#include <linux/fs.h>
-#include <linux/gfp.h>
-#include <linux/if_ether.h>
-#include <linux/kernel.h>
-#include <linux/list.h>
-#include <linux/minmax.h>
-#include <linux/module.h>
-#include <linux/netdevice.h>
-#include <linux/pkt_sched.h>
-#include <linux/poll.h>
-#include <linux/printk.h>
-#include <linux/sched.h> /* for linux/wait.h */
-#include <linux/skbuff.h>
-#include <linux/slab.h>
-#include <linux/spinlock.h>
-#include <linux/stddef.h>
-#include <linux/string.h>
-#include <linux/uaccess.h>
-#include <linux/wait.h>
-#include <uapi/linux/batadv_packet.h>
-
-#include "debugfs.h"
-#include "hard-interface.h"
-#include "log.h"
-#include "originator.h"
-#include "send.h"
-
-static struct batadv_socket_client *batadv_socket_client_hash[256];
-
-static void batadv_socket_add_packet(struct batadv_socket_client *socket_client,
-				     struct batadv_icmp_header *icmph,
-				     size_t icmp_len);
-
-/**
- * batadv_socket_init() - Initialize soft interface independent socket data
- */
-void batadv_socket_init(void)
-{
-	memset(batadv_socket_client_hash, 0, sizeof(batadv_socket_client_hash));
-}
-
-static int batadv_socket_open(struct inode *inode, struct file *file)
-{
-	unsigned int i;
-	struct batadv_socket_client *socket_client;
-
-	if (!try_module_get(THIS_MODULE))
-		return -EBUSY;
-
-	batadv_debugfs_deprecated(file, "");
-
-	stream_open(inode, file);
-
-	socket_client = kmalloc(sizeof(*socket_client), GFP_KERNEL);
-	if (!socket_client) {
-		module_put(THIS_MODULE);
-		return -ENOMEM;
-	}
-
-	for (i = 0; i < ARRAY_SIZE(batadv_socket_client_hash); i++) {
-		if (!batadv_socket_client_hash[i]) {
-			batadv_socket_client_hash[i] = socket_client;
-			break;
-		}
-	}
-
-	if (i == ARRAY_SIZE(batadv_socket_client_hash)) {
-		pr_err("Error - can't add another packet client: maximum number of clients reached\n");
-		kfree(socket_client);
-		module_put(THIS_MODULE);
-		return -EXFULL;
-	}
-
-	INIT_LIST_HEAD(&socket_client->queue_list);
-	socket_client->queue_len = 0;
-	socket_client->index = i;
-	socket_client->bat_priv = inode->i_private;
-	spin_lock_init(&socket_client->lock);
-	init_waitqueue_head(&socket_client->queue_wait);
-
-	file->private_data = socket_client;
-
-	return 0;
-}
-
-static int batadv_socket_release(struct inode *inode, struct file *file)
-{
-	struct batadv_socket_client *client = file->private_data;
-	struct batadv_socket_packet *packet, *tmp;
-
-	spin_lock_bh(&client->lock);
-
-	/* for all packets in the queue ... */
-	list_for_each_entry_safe(packet, tmp, &client->queue_list, list) {
-		list_del(&packet->list);
-		kfree(packet);
-	}
-
-	batadv_socket_client_hash[client->index] = NULL;
-	spin_unlock_bh(&client->lock);
-
-	kfree(client);
-	module_put(THIS_MODULE);
-
-	return 0;
-}
-
-static ssize_t batadv_socket_read(struct file *file, char __user *buf,
-				  size_t count, loff_t *ppos)
-{
-	struct batadv_socket_client *socket_client = file->private_data;
-	struct batadv_socket_packet *socket_packet;
-	size_t packet_len;
-	int error;
-
-	if ((file->f_flags & O_NONBLOCK) && socket_client->queue_len == 0)
-		return -EAGAIN;
-
-	if (!buf || count < sizeof(struct batadv_icmp_packet))
-		return -EINVAL;
-
-	error = wait_event_interruptible(socket_client->queue_wait,
-					 socket_client->queue_len);
-
-	if (error)
-		return error;
-
-	spin_lock_bh(&socket_client->lock);
-
-	socket_packet = list_first_entry(&socket_client->queue_list,
-					 struct batadv_socket_packet, list);
-	list_del(&socket_packet->list);
-	socket_client->queue_len--;
-
-	spin_unlock_bh(&socket_client->lock);
-
-	packet_len = min(count, socket_packet->icmp_len);
-	error = copy_to_user(buf, &socket_packet->icmp_packet, packet_len);
-
-	kfree(socket_packet);
-
-	if (error)
-		return -EFAULT;
-
-	return packet_len;
-}
-
-static ssize_t batadv_socket_write(struct file *file, const char __user *buff,
-				   size_t len, loff_t *off)
-{
-	struct batadv_socket_client *socket_client = file->private_data;
-	struct batadv_priv *bat_priv = socket_client->bat_priv;
-	struct batadv_hard_iface *primary_if = NULL;
-	struct sk_buff *skb;
-	struct batadv_icmp_packet_rr *icmp_packet_rr;
-	struct batadv_icmp_header *icmp_header;
-	struct batadv_orig_node *orig_node = NULL;
-	struct batadv_neigh_node *neigh_node = NULL;
-	size_t packet_len = sizeof(struct batadv_icmp_packet);
-	u8 *addr;
-
-	if (len < sizeof(struct batadv_icmp_header)) {
-		batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
-			   "Error - can't send packet from char device: invalid packet size\n");
-		return -EINVAL;
-	}
-
-	primary_if = batadv_primary_if_get_selected(bat_priv);
-
-	if (!primary_if) {
-		len = -EFAULT;
-		goto out;
-	}
-
-	if (len >= BATADV_ICMP_MAX_PACKET_SIZE)
-		packet_len = BATADV_ICMP_MAX_PACKET_SIZE;
-	else
-		packet_len = len;
-
-	skb = netdev_alloc_skb_ip_align(NULL, packet_len + ETH_HLEN);
-	if (!skb) {
-		len = -ENOMEM;
-		goto out;
-	}
-
-	skb->priority = TC_PRIO_CONTROL;
-	skb_reserve(skb, ETH_HLEN);
-	icmp_header = skb_put(skb, packet_len);
-
-	if (copy_from_user(icmp_header, buff, packet_len)) {
-		len = -EFAULT;
-		goto free_skb;
-	}
-
-	if (icmp_header->packet_type != BATADV_ICMP) {
-		batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
-			   "Error - can't send packet from char device: got bogus packet type (expected: BAT_ICMP)\n");
-		len = -EINVAL;
-		goto free_skb;
-	}
-
-	switch (icmp_header->msg_type) {
-	case BATADV_ECHO_REQUEST:
-		if (len < sizeof(struct batadv_icmp_packet)) {
-			batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
-				   "Error - can't send packet from char device: invalid packet size\n");
-			len = -EINVAL;
-			goto free_skb;
-		}
-
-		if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE)
-			goto dst_unreach;
-
-		orig_node = batadv_orig_hash_find(bat_priv, icmp_header->dst);
-		if (!orig_node)
-			goto dst_unreach;
-
-		neigh_node = batadv_orig_router_get(orig_node,
-						    BATADV_IF_DEFAULT);
-		if (!neigh_node)
-			goto dst_unreach;
-
-		if (!neigh_node->if_incoming)
-			goto dst_unreach;
-
-		if (neigh_node->if_incoming->if_status != BATADV_IF_ACTIVE)
-			goto dst_unreach;
-
-		icmp_packet_rr = (struct batadv_icmp_packet_rr *)icmp_header;
-		if (packet_len == sizeof(*icmp_packet_rr)) {
-			addr = neigh_node->if_incoming->net_dev->dev_addr;
-			ether_addr_copy(icmp_packet_rr->rr[0], addr);
-		}
-
-		break;
-	default:
-		batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
-			   "Error - can't send packet from char device: got unknown message type\n");
-		len = -EINVAL;
-		goto free_skb;
-	}
-
-	icmp_header->uid = socket_client->index;
-
-	if (icmp_header->version != BATADV_COMPAT_VERSION) {
-		icmp_header->msg_type = BATADV_PARAMETER_PROBLEM;
-		icmp_header->version = BATADV_COMPAT_VERSION;
-		batadv_socket_add_packet(socket_client, icmp_header,
-					 packet_len);
-		goto free_skb;
-	}
-
-	ether_addr_copy(icmp_header->orig, primary_if->net_dev->dev_addr);
-
-	batadv_send_unicast_skb(skb, neigh_node);
-	goto out;
-
-dst_unreach:
-	icmp_header->msg_type = BATADV_DESTINATION_UNREACHABLE;
-	batadv_socket_add_packet(socket_client, icmp_header, packet_len);
-free_skb:
-	kfree_skb(skb);
-out:
-	if (primary_if)
-		batadv_hardif_put(primary_if);
-	if (neigh_node)
-		batadv_neigh_node_put(neigh_node);
-	if (orig_node)
-		batadv_orig_node_put(orig_node);
-	return len;
-}
-
-static __poll_t batadv_socket_poll(struct file *file, poll_table *wait)
-{
-	struct batadv_socket_client *socket_client = file->private_data;
-
-	poll_wait(file, &socket_client->queue_wait, wait);
-
-	if (socket_client->queue_len > 0)
-		return EPOLLIN | EPOLLRDNORM;
-
-	return 0;
-}
-
-static const struct file_operations batadv_fops = {
-	.owner = THIS_MODULE,
-	.open = batadv_socket_open,
-	.release = batadv_socket_release,
-	.read = batadv_socket_read,
-	.write = batadv_socket_write,
-	.poll = batadv_socket_poll,
-	.llseek = no_llseek,
-};
-
-/**
- * batadv_socket_setup() - Create debugfs "socket" file
- * @bat_priv: the bat priv with all the soft interface information
- */
-void batadv_socket_setup(struct batadv_priv *bat_priv)
-{
-	debugfs_create_file(BATADV_ICMP_SOCKET, 0600, bat_priv->debug_dir,
-			    bat_priv, &batadv_fops);
-}
-
-/**
- * batadv_socket_add_packet() - schedule an icmp packet to be sent to
- *  userspace on an icmp socket.
- * @socket_client: the socket this packet belongs to
- * @icmph: pointer to the header of the icmp packet
- * @icmp_len: total length of the icmp packet
- */
-static void batadv_socket_add_packet(struct batadv_socket_client *socket_client,
-				     struct batadv_icmp_header *icmph,
-				     size_t icmp_len)
-{
-	struct batadv_socket_packet *socket_packet;
-	size_t len;
-
-	socket_packet = kmalloc(sizeof(*socket_packet), GFP_ATOMIC);
-
-	if (!socket_packet)
-		return;
-
-	len = icmp_len;
-	/* check the maximum length before filling the buffer */
-	if (len > sizeof(socket_packet->icmp_packet))
-		len = sizeof(socket_packet->icmp_packet);
-
-	INIT_LIST_HEAD(&socket_packet->list);
-	memcpy(&socket_packet->icmp_packet, icmph, len);
-	socket_packet->icmp_len = len;
-
-	spin_lock_bh(&socket_client->lock);
-
-	/* while waiting for the lock the socket_client could have been
-	 * deleted
-	 */
-	if (!batadv_socket_client_hash[icmph->uid]) {
-		spin_unlock_bh(&socket_client->lock);
-		kfree(socket_packet);
-		return;
-	}
-
-	list_add_tail(&socket_packet->list, &socket_client->queue_list);
-	socket_client->queue_len++;
-
-	if (socket_client->queue_len > 100) {
-		socket_packet = list_first_entry(&socket_client->queue_list,
-						 struct batadv_socket_packet,
-						 list);
-
-		list_del(&socket_packet->list);
-		kfree(socket_packet);
-		socket_client->queue_len--;
-	}
-
-	spin_unlock_bh(&socket_client->lock);
-
-	wake_up(&socket_client->queue_wait);
-}
-
-/**
- * batadv_socket_receive_packet() - schedule an icmp packet to be received
- *  locally and sent to userspace.
- * @icmph: pointer to the header of the icmp packet
- * @icmp_len: total length of the icmp packet
- */
-void batadv_socket_receive_packet(struct batadv_icmp_header *icmph,
-				  size_t icmp_len)
-{
-	struct batadv_socket_client *hash;
-
-	hash = batadv_socket_client_hash[icmph->uid];
-	if (hash)
-		batadv_socket_add_packet(hash, icmph, icmp_len);
-}