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https://github.com/openwrt/openwrt.git
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6eb6a75b8d
Support for PF_XDP sockets monitoring interface used by the ss tool.
Signed-off-by: Tianling Shen <cnsztl@immortalwrt.org>
(cherry picked from commit 06e64f9b36)
173 lines
4.4 KiB
Diff
173 lines
4.4 KiB
Diff
From 3b6115d6b57a263bdc8c9b1df273bd4a7955eead Mon Sep 17 00:00:00 2001
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From: Felix Fietkau <nbd@nbd.name>
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Date: Sat, 8 Jul 2017 08:16:31 +0200
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Subject: debloat: add some debloat patches, strip down procfs and make O_DIRECT support optional, saves ~15K after lzma on MIPS
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Signed-off-by: Felix Fietkau <nbd@nbd.name>
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---
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net/Kconfig | 3 +++
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net/core/Makefile | 3 ++-
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net/core/sock.c | 2 ++
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net/ipv4/Kconfig | 1 +
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net/netlink/Kconfig | 1 +
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net/packet/Kconfig | 1 +
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net/unix/Kconfig | 1 +
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7 files changed, 11 insertions(+), 1 deletion(-)
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--- a/net/Kconfig
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+++ b/net/Kconfig
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@@ -104,6 +104,9 @@ source "net/mptcp/Kconfig"
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endif # if INET
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+config SOCK_DIAG
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+ bool
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+
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config NETWORK_SECMARK
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bool "Security Marking"
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help
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--- a/net/core/Makefile
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+++ b/net/core/Makefile
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@@ -10,9 +10,10 @@ obj-$(CONFIG_SYSCTL) += sysctl_net_core.
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obj-y += dev.o dev_addr_lists.o dst.o netevent.o \
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neighbour.o rtnetlink.o utils.o link_watch.o filter.o \
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- sock_diag.o dev_ioctl.o tso.o sock_reuseport.o \
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+ dev_ioctl.o tso.o sock_reuseport.o \
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fib_notifier.o xdp.o flow_offload.o
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+obj-$(CONFIG_SOCK_DIAG) += sock_diag.o
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obj-y += net-sysfs.o
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obj-$(CONFIG_PAGE_POOL) += page_pool.o
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obj-$(CONFIG_PROC_FS) += net-procfs.o
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--- a/net/core/sock.c
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+++ b/net/core/sock.c
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@@ -114,6 +114,7 @@
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#include <linux/memcontrol.h>
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#include <linux/prefetch.h>
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#include <linux/compat.h>
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+#include <linux/cookie.h>
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#include <linux/uaccess.h>
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@@ -143,6 +144,7 @@
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static DEFINE_MUTEX(proto_list_mutex);
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static LIST_HEAD(proto_list);
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+DEFINE_COOKIE(sock_cookie);
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static void sock_inuse_add(struct net *net, int val);
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@@ -545,6 +547,18 @@ discard_and_relse:
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}
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EXPORT_SYMBOL(__sk_receive_skb);
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+u64 __sock_gen_cookie(struct sock *sk)
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+{
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+ while (1) {
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+ u64 res = atomic64_read(&sk->sk_cookie);
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+
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+ if (res)
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+ return res;
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+ res = gen_cookie_next(&sock_cookie);
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+ atomic64_cmpxchg(&sk->sk_cookie, 0, res);
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+ }
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+}
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+
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INDIRECT_CALLABLE_DECLARE(struct dst_entry *ip6_dst_check(struct dst_entry *,
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u32));
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INDIRECT_CALLABLE_DECLARE(struct dst_entry *ipv4_dst_check(struct dst_entry *,
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@@ -1986,9 +2000,11 @@ static void __sk_free(struct sock *sk)
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if (likely(sk->sk_net_refcnt))
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sock_inuse_add(sock_net(sk), -1);
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+#ifdef CONFIG_SOCK_DIAG
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if (unlikely(sk->sk_net_refcnt && sock_diag_has_destroy_listeners(sk)))
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sock_diag_broadcast_destroy(sk);
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else
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+#endif
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sk_destruct(sk);
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}
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--- a/net/core/sock_diag.c
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+++ b/net/core/sock_diag.c
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@@ -11,7 +11,6 @@
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#include <linux/tcp.h>
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#include <linux/workqueue.h>
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#include <linux/nospec.h>
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-#include <linux/cookie.h>
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#include <linux/inet_diag.h>
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#include <linux/sock_diag.h>
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@@ -20,20 +19,6 @@ static int (*inet_rcv_compat)(struct sk_
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static DEFINE_MUTEX(sock_diag_table_mutex);
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static struct workqueue_struct *broadcast_wq;
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-DEFINE_COOKIE(sock_cookie);
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-
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-u64 __sock_gen_cookie(struct sock *sk)
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-{
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- while (1) {
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- u64 res = atomic64_read(&sk->sk_cookie);
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-
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- if (res)
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- return res;
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- res = gen_cookie_next(&sock_cookie);
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- atomic64_cmpxchg(&sk->sk_cookie, 0, res);
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- }
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-}
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-
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int sock_diag_check_cookie(struct sock *sk, const __u32 *cookie)
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{
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u64 res;
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--- a/net/ipv4/Kconfig
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+++ b/net/ipv4/Kconfig
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@@ -424,6 +424,7 @@ config INET_TUNNEL
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config INET_DIAG
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tristate "INET: socket monitoring interface"
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+ select SOCK_DIAG
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default y
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help
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Support for INET (TCP, DCCP, etc) socket monitoring interface used by
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--- a/net/netlink/Kconfig
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+++ b/net/netlink/Kconfig
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@@ -5,6 +5,7 @@
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config NETLINK_DIAG
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tristate "NETLINK: socket monitoring interface"
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+ select SOCK_DIAG
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default n
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help
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Support for NETLINK socket monitoring interface used by the ss tool.
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--- a/net/packet/Kconfig
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+++ b/net/packet/Kconfig
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@@ -19,6 +19,7 @@ config PACKET
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config PACKET_DIAG
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tristate "Packet: sockets monitoring interface"
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depends on PACKET
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+ select SOCK_DIAG
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default n
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help
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Support for PF_PACKET sockets monitoring interface used by the ss tool.
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--- a/net/unix/Kconfig
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+++ b/net/unix/Kconfig
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@@ -33,6 +33,7 @@ config AF_UNIX_OOB
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config UNIX_DIAG
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tristate "UNIX: socket monitoring interface"
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depends on UNIX
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+ select SOCK_DIAG
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default n
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help
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Support for UNIX socket monitoring interface used by the ss tool.
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--- a/net/xdp/Kconfig
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+++ b/net/xdp/Kconfig
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@@ -10,6 +10,7 @@ config XDP_SOCKETS
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config XDP_SOCKETS_DIAG
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tristate "XDP sockets: monitoring interface"
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depends on XDP_SOCKETS
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+ select SOCK_DIAG
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default n
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help
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Support for PF_XDP sockets monitoring interface used by the ss tool.
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