forked from luck/tmp_suning_uos_patched
e67f88dd12
Four years ago, Patrick made a change to hold rtnl mutex during netlink dump callbacks. I believe it was a wrong move. This slows down concurrent dumps, making good old /proc/net/ files faster than rtnetlink in some situations. This occurred to me because one "ip link show dev ..." was _very_ slow on a workload adding/removing network devices in background. All dump callbacks are able to use RCU locking now, so this patch does roughly a revert of commits :1c2d670f36: [RTNETLINK]: Hold rtnl_mutex during netlink dump callbacks6313c1e099: [RTNETLINK]: Remove unnecessary locking in dump callbacks This let writers fight for rtnl mutex and readers going full speed. It also takes care of phonet : phonet_route_get() is now called from rcu read section. I renamed it to phonet_route_get_rcu() Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Cc: Patrick McHardy <kaber@trash.net> Cc: Remi Denis-Courmont <remi.denis-courmont@nokia.com> Acked-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
63 lines
1.9 KiB
C
63 lines
1.9 KiB
C
/*
|
|
* File: pn_dev.h
|
|
*
|
|
* Phonet network device
|
|
*
|
|
* Copyright (C) 2008 Nokia Corporation.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* version 2 as published by the Free Software Foundation.
|
|
*
|
|
* 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.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
|
|
* 02110-1301 USA
|
|
*/
|
|
|
|
#ifndef PN_DEV_H
|
|
#define PN_DEV_H
|
|
|
|
struct phonet_device_list {
|
|
struct list_head list;
|
|
struct mutex lock;
|
|
};
|
|
|
|
struct phonet_device_list *phonet_device_list(struct net *net);
|
|
|
|
struct phonet_device {
|
|
struct list_head list;
|
|
struct net_device *netdev;
|
|
DECLARE_BITMAP(addrs, 64);
|
|
struct rcu_head rcu;
|
|
};
|
|
|
|
int phonet_device_init(void);
|
|
void phonet_device_exit(void);
|
|
int phonet_netlink_register(void);
|
|
struct net_device *phonet_device_get(struct net *net);
|
|
|
|
int phonet_address_add(struct net_device *dev, u8 addr);
|
|
int phonet_address_del(struct net_device *dev, u8 addr);
|
|
u8 phonet_address_get(struct net_device *dev, u8 addr);
|
|
int phonet_address_lookup(struct net *net, u8 addr);
|
|
void phonet_address_notify(int event, struct net_device *dev, u8 addr);
|
|
|
|
int phonet_route_add(struct net_device *dev, u8 daddr);
|
|
int phonet_route_del(struct net_device *dev, u8 daddr);
|
|
void rtm_phonet_notify(int event, struct net_device *dev, u8 dst);
|
|
struct net_device *phonet_route_get_rcu(struct net *net, u8 daddr);
|
|
struct net_device *phonet_route_output(struct net *net, u8 daddr);
|
|
|
|
#define PN_NO_ADDR 0xff
|
|
|
|
extern const struct file_operations pn_sock_seq_fops;
|
|
extern const struct file_operations pn_res_seq_fops;
|
|
|
|
#endif
|