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cd40b7d398
android_kernel_xiaomi_sm8350/net/ipv4
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Denis V. Lunev cd40b7d398 [NET]: make netlink user -> kernel interface synchronious 
This patch make processing netlink user -> kernel messages synchronious.
This change was inspired by the talk with Alexey Kuznetsov about current
netlink messages processing. He says that he was badly wrong when introduced 
asynchronious user -> kernel communication.

The call netlink_unicast is the only path to send message to the kernel
netlink socket. But, unfortunately, it is also used to send data to the
user.

Before this change the user message has been attached to the socket queue
and sk->sk_data_ready was called. The process has been blocked until all
pending messages were processed. The bad thing is that this processing
may occur in the arbitrary process context.

This patch changes nlk->data_ready callback to get 1 skb and force packet
processing right in the netlink_unicast.

Kernel -> user path in netlink_unicast remains untouched.

EINTR processing for in netlink_run_queue was changed. It forces rtnl_lock
drop, but the process remains in the cycle until the message will be fully
processed. So, there is no need to use this kludges now.

Signed-off-by: Denis V. Lunev <den@openvz.org>
Acked-by: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-10 21:15:29 -07:00
..
ipvs [NET]: Make core networking code use seq_open_private 2007-10-10 16:55:33 -07:00
netfilter [NET]: make netlink user -> kernel interface synchronious 2007-10-10 21:15:29 -07:00
af_inet.c [IPV4]: Add ICMPMsgStats MIB (RFC 4293) 2007-10-10 16:51:28 -07:00
ah4.c [IPSEC]: Move IP protocol setting from transforms into xfrm4_input.c 2007-10-10 16:55:56 -07:00
arp.c [NET]: Make core networking code use seq_open_private 2007-10-10 16:55:33 -07:00
cipso_ipv4.c [CIPSO]: remove duplicated code in the cipso_v4_*_getattr() functions 2007-10-10 16:51:17 -07:00
datagram.c
devinet.c [IPV4]: When possible test for IFF_LOOPBACK and not dev == loopback_dev 2007-10-10 16:52:48 -07:00
esp4.c [IPSEC]: Move IP protocol setting from transforms into xfrm4_input.c 2007-10-10 16:55:56 -07:00
fib_frontend.c [NET]: make netlink user -> kernel interface synchronious 2007-10-10 21:15:29 -07:00
fib_hash.c [NET]: Make core networking code use seq_open_private 2007-10-10 16:55:33 -07:00
fib_lookup.h
fib_rules.c [IPV4/IPV6/DECNET]: Small cleanup for fib rules. 2007-10-10 16:51:22 -07:00
fib_semantics.c [NETLINK]: Introduce nested and byteorder flag to netlink attribute 2007-10-10 16:49:16 -07:00
fib_trie.c [NET]: Make core networking code use seq_open_private 2007-10-10 16:55:33 -07:00
icmp.c [IPV4]: Add ICMPMsgStats MIB (RFC 4293) 2007-10-10 16:51:28 -07:00
igmp.c [NET]: Make core networking code use seq_open_private 2007-10-10 16:55:33 -07:00
inet_connection_sock.c [INET]: local port range robustness 2007-10-10 17:30:46 -07:00
inet_diag.c [NET]: make netlink user -> kernel interface synchronious 2007-10-10 21:15:29 -07:00
inet_hashtables.c [INET]: local port range robustness 2007-10-10 17:30:46 -07:00
inet_lro.c [NET]: sparse warning fixes 2007-10-10 16:54:48 -07:00
inet_timewait_sock.c [NET]: DIV_ROUND_UP cleanup (part two) 2007-10-10 16:48:37 -07:00
inetpeer.c
ip_forward.c [IPV4] IPSEC: Omit redirect for tunnelled packet. 2007-10-10 16:48:33 -07:00
ip_fragment.c [NET]: Make the device list and device lookups per namespace. 2007-10-10 16:49:10 -07:00
ip_gre.c [NET]: Move hardware header operations out of netdevice. 2007-10-10 16:52:52 -07:00
ip_input.c [NET]: Make packet reception network namespace safe 2007-10-10 16:49:08 -07:00
ip_options.c
ip_output.c [NET]: Move hardware header operations out of netdevice. 2007-10-10 16:52:52 -07:00
ip_sockglue.c [NET]: sparse warning fixes 2007-10-10 16:54:48 -07:00
ipcomp.c [IPSEC]: Move IP protocol setting from transforms into xfrm4_input.c 2007-10-10 16:55:56 -07:00
ipconfig.c [NET]: Wrap netdevice hardware header creation. 2007-10-10 16:52:50 -07:00
ipip.c [NET]: Nuke SET_MODULE_OWNER macro. 2007-10-10 16:51:13 -07:00
ipmr.c [NET]: Make core networking code use seq_open_private 2007-10-10 16:55:33 -07:00
Kconfig [NET]: Generic Large Receive Offload for TCP traffic 2007-10-10 16:47:46 -07:00
Makefile [NET]: Generic Large Receive Offload for TCP traffic 2007-10-10 16:47:46 -07:00
netfilter.c
proc.c [NET]: sparse warning fixes 2007-10-10 16:54:48 -07:00
protocol.c
raw.c [NET]: Make core networking code use seq_open_private 2007-10-10 16:55:33 -07:00
route.c [NET]: Make core networking code use seq_open_private 2007-10-10 16:55:33 -07:00
syncookies.c
sysctl_net_ipv4.c [INET]: local port range robustness 2007-10-10 17:30:46 -07:00
tcp_bic.c [TCP]: Remove num_acked>0 checks from cong.ctrl mods pkts_acked 2007-10-10 16:47:55 -07:00
tcp_cong.c
tcp_cubic.c [TCP]: Remove num_acked>0 checks from cong.ctrl mods pkts_acked 2007-10-10 16:47:55 -07:00
tcp_diag.c [TCP]: Return useful listenq info in tcp_info and INET_DIAG_INFO. 2007-10-10 16:51:35 -07:00
tcp_highspeed.c
tcp_htcp.c [TCP]: H-TCP maxRTT estimation at startup 2007-08-07 18:29:05 -07:00
tcp_hybla.c
tcp_illinois.c
tcp_input.c [TCP]: Separate lost_retrans loop into own function 2007-10-10 16:55:51 -07:00
tcp_ipv4.c [INET]: local port range robustness 2007-10-10 17:30:46 -07:00
tcp_lp.c
tcp_minisocks.c [TCP]: Move sack_ok access to obviously named funcs & cleanup 2007-10-10 16:48:00 -07:00
tcp_output.c [TCP]: Fix two off-by-one errors in fackets_out adjusting logic 2007-10-10 16:54:47 -07:00
tcp_probe.c [NET]: Make /proc/net per network namespace 2007-10-10 16:49:06 -07:00
tcp_scalable.c
tcp_timer.c [TCP]: Move sack_ok access to obviously named funcs & cleanup 2007-10-10 16:48:00 -07:00
tcp_vegas.c
tcp_vegas.h
tcp_veno.c
tcp_westwood.c
tcp_yeah.c
tcp.c [TCP]: Return useful listenq info in tcp_info and INET_DIAG_INFO. 2007-10-10 16:51:35 -07:00
tunnel4.c
udp_impl.h [UDP]: Randomize port selection. 2007-10-10 16:48:31 -07:00
udp.c [INET]: local port range robustness 2007-10-10 17:30:46 -07:00
udplite.c [UDP]: Randomize port selection. 2007-10-10 16:48:31 -07:00
xfrm4_input.c [IPSEC]: Move IP protocol setting from transforms into xfrm4_input.c 2007-10-10 16:55:56 -07:00
xfrm4_mode_beet.c [IPSEC]: Move IP length/checksum setting out of transforms 2007-10-10 16:55:56 -07:00
xfrm4_mode_transport.c [IPSEC]: Use IPv6 calling convention as the convention for x->mode->output 2007-10-10 16:55:54 -07:00
xfrm4_mode_tunnel.c [IPSEC]: Move IP length/checksum setting out of transforms 2007-10-10 16:55:56 -07:00
xfrm4_output.c [IPSEC]: Move IP length/checksum setting out of transforms 2007-10-10 16:55:56 -07:00
xfrm4_policy.c [NET]: Make the loopback device per network namespace. 2007-10-10 16:52:49 -07:00
xfrm4_state.c
xfrm4_tunnel.c [IPSEC]: Move IP protocol setting from transforms into xfrm4_input.c 2007-10-10 16:55:56 -07:00