forked from luck/tmp_suning_uos_patched
b195167fcf
This patch allows the user to control the hash elasticity/max parameters. The elasticity setting does not take effect until the next new multicast group is added. At which point it is checked and if after rehashing it still can't be satisfied then snooping will be disabled. The max setting on the other hand takes effect immediately. It must be a power of two and cannot be set to a value less than the current number of multicast group entries. This is the only way to shrink the multicast hash. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
543 lines
14 KiB
C
543 lines
14 KiB
C
/*
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* Sysfs attributes of bridge ports
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* Linux ethernet bridge
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*
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* Authors:
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* Stephen Hemminger <shemminger@osdl.org>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/capability.h>
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#include <linux/kernel.h>
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#include <linux/netdevice.h>
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#include <linux/if_bridge.h>
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#include <linux/rtnetlink.h>
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#include <linux/spinlock.h>
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#include <linux/times.h>
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#include "br_private.h"
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#define to_dev(obj) container_of(obj, struct device, kobj)
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#define to_bridge(cd) ((struct net_bridge *)netdev_priv(to_net_dev(cd)))
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/*
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* Common code for storing bridge parameters.
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*/
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static ssize_t store_bridge_parm(struct device *d,
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const char *buf, size_t len,
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int (*set)(struct net_bridge *, unsigned long))
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{
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struct net_bridge *br = to_bridge(d);
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char *endp;
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unsigned long val;
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int err;
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if (!capable(CAP_NET_ADMIN))
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return -EPERM;
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val = simple_strtoul(buf, &endp, 0);
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if (endp == buf)
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return -EINVAL;
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spin_lock_bh(&br->lock);
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err = (*set)(br, val);
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spin_unlock_bh(&br->lock);
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return err ? err : len;
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}
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static ssize_t show_forward_delay(struct device *d,
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struct device_attribute *attr, char *buf)
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{
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struct net_bridge *br = to_bridge(d);
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return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->forward_delay));
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}
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static int set_forward_delay(struct net_bridge *br, unsigned long val)
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{
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unsigned long delay = clock_t_to_jiffies(val);
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br->forward_delay = delay;
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if (br_is_root_bridge(br))
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br->bridge_forward_delay = delay;
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return 0;
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}
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static ssize_t store_forward_delay(struct device *d,
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struct device_attribute *attr,
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const char *buf, size_t len)
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{
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return store_bridge_parm(d, buf, len, set_forward_delay);
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}
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static DEVICE_ATTR(forward_delay, S_IRUGO | S_IWUSR,
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show_forward_delay, store_forward_delay);
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static ssize_t show_hello_time(struct device *d, struct device_attribute *attr,
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char *buf)
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{
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return sprintf(buf, "%lu\n",
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jiffies_to_clock_t(to_bridge(d)->hello_time));
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}
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static int set_hello_time(struct net_bridge *br, unsigned long val)
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{
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unsigned long t = clock_t_to_jiffies(val);
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if (t < HZ)
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return -EINVAL;
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br->hello_time = t;
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if (br_is_root_bridge(br))
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br->bridge_hello_time = t;
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return 0;
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}
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static ssize_t store_hello_time(struct device *d,
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struct device_attribute *attr, const char *buf,
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size_t len)
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{
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return store_bridge_parm(d, buf, len, set_hello_time);
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}
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static DEVICE_ATTR(hello_time, S_IRUGO | S_IWUSR, show_hello_time,
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store_hello_time);
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static ssize_t show_max_age(struct device *d, struct device_attribute *attr,
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char *buf)
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{
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return sprintf(buf, "%lu\n",
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jiffies_to_clock_t(to_bridge(d)->max_age));
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}
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static int set_max_age(struct net_bridge *br, unsigned long val)
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{
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unsigned long t = clock_t_to_jiffies(val);
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br->max_age = t;
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if (br_is_root_bridge(br))
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br->bridge_max_age = t;
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return 0;
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}
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static ssize_t store_max_age(struct device *d, struct device_attribute *attr,
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const char *buf, size_t len)
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{
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return store_bridge_parm(d, buf, len, set_max_age);
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}
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static DEVICE_ATTR(max_age, S_IRUGO | S_IWUSR, show_max_age, store_max_age);
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static ssize_t show_ageing_time(struct device *d,
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struct device_attribute *attr, char *buf)
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{
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struct net_bridge *br = to_bridge(d);
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return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->ageing_time));
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}
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static int set_ageing_time(struct net_bridge *br, unsigned long val)
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{
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br->ageing_time = clock_t_to_jiffies(val);
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return 0;
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}
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static ssize_t store_ageing_time(struct device *d,
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struct device_attribute *attr,
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const char *buf, size_t len)
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{
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return store_bridge_parm(d, buf, len, set_ageing_time);
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}
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static DEVICE_ATTR(ageing_time, S_IRUGO | S_IWUSR, show_ageing_time,
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store_ageing_time);
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static ssize_t show_stp_state(struct device *d,
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struct device_attribute *attr, char *buf)
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{
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struct net_bridge *br = to_bridge(d);
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return sprintf(buf, "%d\n", br->stp_enabled);
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}
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static ssize_t store_stp_state(struct device *d,
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struct device_attribute *attr, const char *buf,
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size_t len)
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{
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struct net_bridge *br = to_bridge(d);
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char *endp;
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unsigned long val;
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if (!capable(CAP_NET_ADMIN))
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return -EPERM;
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val = simple_strtoul(buf, &endp, 0);
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if (endp == buf)
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return -EINVAL;
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if (!rtnl_trylock())
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return restart_syscall();
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br_stp_set_enabled(br, val);
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rtnl_unlock();
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return len;
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}
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static DEVICE_ATTR(stp_state, S_IRUGO | S_IWUSR, show_stp_state,
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store_stp_state);
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static ssize_t show_priority(struct device *d, struct device_attribute *attr,
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char *buf)
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{
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struct net_bridge *br = to_bridge(d);
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return sprintf(buf, "%d\n",
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(br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1]);
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}
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static int set_priority(struct net_bridge *br, unsigned long val)
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{
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br_stp_set_bridge_priority(br, (u16) val);
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return 0;
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}
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static ssize_t store_priority(struct device *d, struct device_attribute *attr,
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const char *buf, size_t len)
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{
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return store_bridge_parm(d, buf, len, set_priority);
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}
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static DEVICE_ATTR(priority, S_IRUGO | S_IWUSR, show_priority, store_priority);
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static ssize_t show_root_id(struct device *d, struct device_attribute *attr,
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char *buf)
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{
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return br_show_bridge_id(buf, &to_bridge(d)->designated_root);
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}
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static DEVICE_ATTR(root_id, S_IRUGO, show_root_id, NULL);
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static ssize_t show_bridge_id(struct device *d, struct device_attribute *attr,
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char *buf)
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{
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return br_show_bridge_id(buf, &to_bridge(d)->bridge_id);
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}
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static DEVICE_ATTR(bridge_id, S_IRUGO, show_bridge_id, NULL);
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static ssize_t show_root_port(struct device *d, struct device_attribute *attr,
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char *buf)
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{
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return sprintf(buf, "%d\n", to_bridge(d)->root_port);
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}
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static DEVICE_ATTR(root_port, S_IRUGO, show_root_port, NULL);
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static ssize_t show_root_path_cost(struct device *d,
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struct device_attribute *attr, char *buf)
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{
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return sprintf(buf, "%d\n", to_bridge(d)->root_path_cost);
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}
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static DEVICE_ATTR(root_path_cost, S_IRUGO, show_root_path_cost, NULL);
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static ssize_t show_topology_change(struct device *d,
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struct device_attribute *attr, char *buf)
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{
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return sprintf(buf, "%d\n", to_bridge(d)->topology_change);
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}
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static DEVICE_ATTR(topology_change, S_IRUGO, show_topology_change, NULL);
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static ssize_t show_topology_change_detected(struct device *d,
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struct device_attribute *attr,
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char *buf)
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{
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struct net_bridge *br = to_bridge(d);
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return sprintf(buf, "%d\n", br->topology_change_detected);
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}
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static DEVICE_ATTR(topology_change_detected, S_IRUGO,
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show_topology_change_detected, NULL);
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static ssize_t show_hello_timer(struct device *d,
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struct device_attribute *attr, char *buf)
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{
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struct net_bridge *br = to_bridge(d);
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return sprintf(buf, "%ld\n", br_timer_value(&br->hello_timer));
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}
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static DEVICE_ATTR(hello_timer, S_IRUGO, show_hello_timer, NULL);
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static ssize_t show_tcn_timer(struct device *d, struct device_attribute *attr,
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char *buf)
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{
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struct net_bridge *br = to_bridge(d);
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return sprintf(buf, "%ld\n", br_timer_value(&br->tcn_timer));
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}
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static DEVICE_ATTR(tcn_timer, S_IRUGO, show_tcn_timer, NULL);
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static ssize_t show_topology_change_timer(struct device *d,
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struct device_attribute *attr,
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char *buf)
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{
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struct net_bridge *br = to_bridge(d);
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return sprintf(buf, "%ld\n", br_timer_value(&br->topology_change_timer));
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}
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static DEVICE_ATTR(topology_change_timer, S_IRUGO, show_topology_change_timer,
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NULL);
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static ssize_t show_gc_timer(struct device *d, struct device_attribute *attr,
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char *buf)
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{
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struct net_bridge *br = to_bridge(d);
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return sprintf(buf, "%ld\n", br_timer_value(&br->gc_timer));
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}
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static DEVICE_ATTR(gc_timer, S_IRUGO, show_gc_timer, NULL);
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static ssize_t show_group_addr(struct device *d,
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struct device_attribute *attr, char *buf)
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{
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struct net_bridge *br = to_bridge(d);
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return sprintf(buf, "%x:%x:%x:%x:%x:%x\n",
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br->group_addr[0], br->group_addr[1],
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br->group_addr[2], br->group_addr[3],
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br->group_addr[4], br->group_addr[5]);
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}
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static ssize_t store_group_addr(struct device *d,
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struct device_attribute *attr,
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const char *buf, size_t len)
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{
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struct net_bridge *br = to_bridge(d);
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unsigned new_addr[6];
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int i;
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if (!capable(CAP_NET_ADMIN))
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return -EPERM;
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if (sscanf(buf, "%x:%x:%x:%x:%x:%x",
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&new_addr[0], &new_addr[1], &new_addr[2],
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&new_addr[3], &new_addr[4], &new_addr[5]) != 6)
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return -EINVAL;
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/* Must be 01:80:c2:00:00:0X */
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for (i = 0; i < 5; i++)
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if (new_addr[i] != br_group_address[i])
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return -EINVAL;
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if (new_addr[5] & ~0xf)
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return -EINVAL;
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if (new_addr[5] == 1 || /* 802.3x Pause address */
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new_addr[5] == 2 || /* 802.3ad Slow protocols */
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new_addr[5] == 3) /* 802.1X PAE address */
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return -EINVAL;
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spin_lock_bh(&br->lock);
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for (i = 0; i < 6; i++)
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br->group_addr[i] = new_addr[i];
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spin_unlock_bh(&br->lock);
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return len;
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}
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static DEVICE_ATTR(group_addr, S_IRUGO | S_IWUSR,
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show_group_addr, store_group_addr);
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static ssize_t store_flush(struct device *d,
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struct device_attribute *attr,
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const char *buf, size_t len)
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{
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struct net_bridge *br = to_bridge(d);
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if (!capable(CAP_NET_ADMIN))
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return -EPERM;
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br_fdb_flush(br);
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return len;
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}
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static DEVICE_ATTR(flush, S_IWUSR, NULL, store_flush);
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#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
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static ssize_t show_multicast_router(struct device *d,
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struct device_attribute *attr, char *buf)
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{
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struct net_bridge *br = to_bridge(d);
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return sprintf(buf, "%d\n", br->multicast_router);
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}
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static ssize_t store_multicast_router(struct device *d,
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struct device_attribute *attr,
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const char *buf, size_t len)
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{
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return store_bridge_parm(d, buf, len, br_multicast_set_router);
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}
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static DEVICE_ATTR(multicast_router, S_IRUGO | S_IWUSR, show_multicast_router,
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store_multicast_router);
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static ssize_t show_multicast_snooping(struct device *d,
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struct device_attribute *attr,
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char *buf)
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{
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struct net_bridge *br = to_bridge(d);
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return sprintf(buf, "%d\n", !br->multicast_disabled);
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}
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static ssize_t store_multicast_snooping(struct device *d,
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struct device_attribute *attr,
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const char *buf, size_t len)
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{
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return store_bridge_parm(d, buf, len, br_multicast_toggle);
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}
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static DEVICE_ATTR(multicast_snooping, S_IRUGO | S_IWUSR,
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show_multicast_snooping, store_multicast_snooping);
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static ssize_t show_hash_elasticity(struct device *d,
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struct device_attribute *attr, char *buf)
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{
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struct net_bridge *br = to_bridge(d);
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return sprintf(buf, "%u\n", br->hash_elasticity);
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}
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static int set_elasticity(struct net_bridge *br, unsigned long val)
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{
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br->hash_elasticity = val;
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return 0;
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}
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static ssize_t store_hash_elasticity(struct device *d,
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struct device_attribute *attr,
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const char *buf, size_t len)
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{
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return store_bridge_parm(d, buf, len, set_elasticity);
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}
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static DEVICE_ATTR(hash_elasticity, S_IRUGO | S_IWUSR, show_hash_elasticity,
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store_hash_elasticity);
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static ssize_t show_hash_max(struct device *d, struct device_attribute *attr,
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char *buf)
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{
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struct net_bridge *br = to_bridge(d);
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return sprintf(buf, "%u\n", br->hash_max);
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}
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static ssize_t store_hash_max(struct device *d, struct device_attribute *attr,
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const char *buf, size_t len)
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{
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return store_bridge_parm(d, buf, len, br_multicast_set_hash_max);
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}
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static DEVICE_ATTR(hash_max, S_IRUGO | S_IWUSR, show_hash_max,
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store_hash_max);
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#endif
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static struct attribute *bridge_attrs[] = {
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&dev_attr_forward_delay.attr,
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&dev_attr_hello_time.attr,
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&dev_attr_max_age.attr,
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&dev_attr_ageing_time.attr,
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&dev_attr_stp_state.attr,
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&dev_attr_priority.attr,
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&dev_attr_bridge_id.attr,
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&dev_attr_root_id.attr,
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&dev_attr_root_path_cost.attr,
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&dev_attr_root_port.attr,
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&dev_attr_topology_change.attr,
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&dev_attr_topology_change_detected.attr,
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&dev_attr_hello_timer.attr,
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&dev_attr_tcn_timer.attr,
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&dev_attr_topology_change_timer.attr,
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&dev_attr_gc_timer.attr,
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&dev_attr_group_addr.attr,
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&dev_attr_flush.attr,
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#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
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&dev_attr_multicast_router.attr,
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&dev_attr_multicast_snooping.attr,
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&dev_attr_hash_elasticity.attr,
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&dev_attr_hash_max.attr,
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#endif
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NULL
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};
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static struct attribute_group bridge_group = {
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.name = SYSFS_BRIDGE_ATTR,
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.attrs = bridge_attrs,
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};
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/*
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* Export the forwarding information table as a binary file
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* The records are struct __fdb_entry.
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*
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* Returns the number of bytes read.
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*/
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static ssize_t brforward_read(struct kobject *kobj,
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struct bin_attribute *bin_attr,
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char *buf, loff_t off, size_t count)
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{
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struct device *dev = to_dev(kobj);
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struct net_bridge *br = to_bridge(dev);
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int n;
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/* must read whole records */
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if (off % sizeof(struct __fdb_entry) != 0)
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return -EINVAL;
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n = br_fdb_fillbuf(br, buf,
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count / sizeof(struct __fdb_entry),
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off / sizeof(struct __fdb_entry));
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if (n > 0)
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n *= sizeof(struct __fdb_entry);
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return n;
|
|
}
|
|
|
|
static struct bin_attribute bridge_forward = {
|
|
.attr = { .name = SYSFS_BRIDGE_FDB,
|
|
.mode = S_IRUGO, },
|
|
.read = brforward_read,
|
|
};
|
|
|
|
/*
|
|
* Add entries in sysfs onto the existing network class device
|
|
* for the bridge.
|
|
* Adds a attribute group "bridge" containing tuning parameters.
|
|
* Binary attribute containing the forward table
|
|
* Sub directory to hold links to interfaces.
|
|
*
|
|
* Note: the ifobj exists only to be a subdirectory
|
|
* to hold links. The ifobj exists in same data structure
|
|
* as it's parent the bridge so reference counting works.
|
|
*/
|
|
int br_sysfs_addbr(struct net_device *dev)
|
|
{
|
|
struct kobject *brobj = &dev->dev.kobj;
|
|
struct net_bridge *br = netdev_priv(dev);
|
|
int err;
|
|
|
|
err = sysfs_create_group(brobj, &bridge_group);
|
|
if (err) {
|
|
pr_info("%s: can't create group %s/%s\n",
|
|
__func__, dev->name, bridge_group.name);
|
|
goto out1;
|
|
}
|
|
|
|
err = sysfs_create_bin_file(brobj, &bridge_forward);
|
|
if (err) {
|
|
pr_info("%s: can't create attribute file %s/%s\n",
|
|
__func__, dev->name, bridge_forward.attr.name);
|
|
goto out2;
|
|
}
|
|
|
|
br->ifobj = kobject_create_and_add(SYSFS_BRIDGE_PORT_SUBDIR, brobj);
|
|
if (!br->ifobj) {
|
|
pr_info("%s: can't add kobject (directory) %s/%s\n",
|
|
__func__, dev->name, SYSFS_BRIDGE_PORT_SUBDIR);
|
|
goto out3;
|
|
}
|
|
return 0;
|
|
out3:
|
|
sysfs_remove_bin_file(&dev->dev.kobj, &bridge_forward);
|
|
out2:
|
|
sysfs_remove_group(&dev->dev.kobj, &bridge_group);
|
|
out1:
|
|
return err;
|
|
|
|
}
|
|
|
|
void br_sysfs_delbr(struct net_device *dev)
|
|
{
|
|
struct kobject *kobj = &dev->dev.kobj;
|
|
struct net_bridge *br = netdev_priv(dev);
|
|
|
|
kobject_put(br->ifobj);
|
|
sysfs_remove_bin_file(kobj, &bridge_forward);
|
|
sysfs_remove_group(kobj, &bridge_group);
|
|
}
|