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Commit 934272e9 authored by Maciej Żenczykowski's avatar Maciej Żenczykowski
Browse files

ANDROID: revert "net: ipv4: sysfs_net_ipv4: Add sysfs-based knobs for controlling TCP window size" 



This reverts commit b91b8576.

Q userspace no longer requires these tunables, and the 4.19 android common kernel
no longer carries this patch, so revert it also in 4.14 android common kernel.

Bug: 126767155
Signed-off-by: default avatarMaciej Żenczykowski <maze@google.com>
Change-Id: Ia75ed21bf89a66837b85d5be5fe76efe5f237a18
parent 0cc8f104

net/ipv4/Makefile

+0 −1
Original line number Diff line number Diff line
@@ -17,7 +17,6 @@ obj-y := route.o inetpeer.o protocol.o \ 


obj-$(CONFIG_NET_IP_TUNNEL) += ip_tunnel.o

obj-$(CONFIG_SYSCTL) += sysctl_net_ipv4.o

obj-$(CONFIG_SYSFS) += sysfs_net_ipv4.o

obj-$(CONFIG_PROC_FS) += proc.o

obj-$(CONFIG_IP_MULTIPLE_TABLES) += fib_rules.o

obj-$(CONFIG_IP_MROUTE) += ipmr.o

net/ipv4/sysfs_net_ipv4.c

deleted100644 → 0
+0 −88
Original line number Diff line number Diff line 
/*

 * net/ipv4/sysfs_net_ipv4.c

 *

 * sysfs-based networking knobs (so we can, unlike with sysctl, control perms)

 *

 * Copyright (C) 2008 Google, Inc.

 *

 * Robert Love <rlove@google.com>

 *

 * This software is licensed under the terms of the GNU General Public

 * License version 2, as published by the Free Software Foundation, and

 * may be copied, distributed, and modified under those terms.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 */



#include <linux/kobject.h>

#include <linux/string.h>

#include <linux/sysfs.h>

#include <linux/init.h>

#include <net/tcp.h>



#define CREATE_IPV4_FILE(_name, _var) \

static ssize_t _name##_show(struct kobject *kobj, \

			    struct kobj_attribute *attr, char *buf) \

{ \

	return sprintf(buf, "%d\n", _var); \

} \

static ssize_t _name##_store(struct kobject *kobj, \

			     struct kobj_attribute *attr, \

			     const char *buf, size_t count) \

{ \

	int val, ret; \

	ret = sscanf(buf, "%d", &val); \

	if (ret != 1) \

		return -EINVAL; \

	if (val < 0) \

		return -EINVAL; \

	_var = val; \

	return count; \

} \

static struct kobj_attribute _name##_attr = \

	__ATTR(_name, 0644, _name##_show, _name##_store)



CREATE_IPV4_FILE(tcp_wmem_min, sysctl_tcp_wmem[0]);

CREATE_IPV4_FILE(tcp_wmem_def, sysctl_tcp_wmem[1]);

CREATE_IPV4_FILE(tcp_wmem_max, sysctl_tcp_wmem[2]);



CREATE_IPV4_FILE(tcp_rmem_min, sysctl_tcp_rmem[0]);

CREATE_IPV4_FILE(tcp_rmem_def, sysctl_tcp_rmem[1]);

CREATE_IPV4_FILE(tcp_rmem_max, sysctl_tcp_rmem[2]);



static struct attribute *ipv4_attrs[] = {

	&tcp_wmem_min_attr.attr,

	&tcp_wmem_def_attr.attr,

	&tcp_wmem_max_attr.attr,

	&tcp_rmem_min_attr.attr,

	&tcp_rmem_def_attr.attr,

	&tcp_rmem_max_attr.attr,

	NULL

};



static struct attribute_group ipv4_attr_group = {

	.attrs = ipv4_attrs,

};



static __init int sysfs_ipv4_init(void)

{

	struct kobject *ipv4_kobject;

	int ret;



	ipv4_kobject = kobject_create_and_add("ipv4", kernel_kobj);

	if (!ipv4_kobject)

		return -ENOMEM;



	ret = sysfs_create_group(ipv4_kobject, &ipv4_attr_group);

	if (ret) {

		kobject_put(ipv4_kobject);

		return ret;

	}



	return 0;

}



subsys_initcall(sysfs_ipv4_init);