520 lines
13 KiB
C
520 lines
13 KiB
C
#include <linux/version.h>
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#if LINUX_VERSION_CODE == KERNEL_VERSION(2,6,18)
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/*
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* Sysfs attributes of bridge for OpenFlow
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*
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* This has been shamelessly copied from the kernel sources.
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*/
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#include <linux/capability.h>
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#include <linux/device.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 <linux/version.h>
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#include "brc_sysfs.h"
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#include "datapath.h"
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#include "dp_dev.h"
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#define to_dev(obj) container_of(obj, struct device, kobj)
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/* Hack to attempt to build on more platforms. */
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,21)
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#define to_kobj(d) &(d)->class_dev.kobj
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#define BRC_DEVICE_ATTR CLASS_DEVICE_ATTR
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#else
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#define to_kobj(d) &(d)->dev.kobj
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#define BRC_DEVICE_ATTR DEVICE_ATTR
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#endif
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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 class_device *d,
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const char *buf, size_t len,
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void (*set)(struct datapath *, unsigned long))
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{
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struct datapath *dp = dp_dev_get_dp(to_net_dev(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 0
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spin_lock_bh(&br->lock);
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(*set)(br, val);
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spin_unlock_bh(&br->lock);
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#else
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printk("%s: xxx writing dp parms not supported yet!\n",
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dp->netdev->name);
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#endif
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return len;
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}
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static ssize_t show_forward_delay(struct class_device *d,
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char *buf)
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{
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#if 0
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struct datapath *dp = dp_dev_get_dp(to_net_dev(d));
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return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->forward_delay));
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#else
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return sprintf(buf, "%d\n", 0);
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#endif
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}
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static void set_forward_delay(struct datapath *dp, unsigned long val)
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{
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#if 0
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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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#else
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printk("%s: xxx attempt to set_forward_delay()\n", dp->netdev->name);
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#endif
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}
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static ssize_t store_forward_delay(struct class_device *d,
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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 BRC_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 class_device *d, char *buf)
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{
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#if 0
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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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#else
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return sprintf(buf, "%d\n", 0);
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#endif
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}
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static void set_hello_time(struct datapath *dp, unsigned long val)
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{
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#if 0
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unsigned long t = clock_t_to_jiffies(val);
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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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#else
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printk("%s: xxx attempt to set_hello_time()\n", dp->netdev->name);
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#endif
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}
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static ssize_t store_hello_time(struct class_device *d,
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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 BRC_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 class_device *d,
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char *buf)
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{
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#if 0
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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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#else
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return sprintf(buf, "%d\n", 0);
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#endif
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}
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static void set_max_age(struct datapath *dp, unsigned long val)
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{
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#if 0
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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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#else
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printk("%s: xxx attempt to set_max_age()\n", dp->netdev->name);
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#endif
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}
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static ssize_t store_max_age(struct class_device *d,
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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 BRC_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 class_device *d,
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char *buf)
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{
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#if 0
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struct datapath *dp = dp_dev_get_dp(to_net_dev(d));
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return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->ageing_time));
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#else
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return sprintf(buf, "%d\n", 0);
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#endif
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}
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static void set_ageing_time(struct datapath *dp, unsigned long val)
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{
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#if 0
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br->ageing_time = clock_t_to_jiffies(val);
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#else
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printk("%s: xxx attempt to set_ageing_time()\n", dp->netdev->name);
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#endif
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}
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static ssize_t store_ageing_time(struct class_device *d,
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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 BRC_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 class_device *d,
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char *buf)
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{
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#if 0
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struct datapath *dp = dp_dev_get_dp(to_net_dev(d));
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return sprintf(buf, "%d\n", br->stp_enabled);
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#else
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return sprintf(buf, "%d\n", 0);
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#endif
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}
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static ssize_t store_stp_state(struct class_device *d,
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const char *buf,
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size_t len)
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{
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struct datapath *dp = dp_dev_get_dp(to_net_dev(d));
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#if 0
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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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rtnl_lock();
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br_stp_set_enabled(br, val);
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rtnl_unlock();
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#else
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printk("%s: xxx attempt to set_stp_state()\n", dp->netdev->name);
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#endif
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return len;
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}
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static BRC_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 class_device *d,
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char *buf)
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{
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#if 0
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struct datapath *dp = dp_dev_get_dp(to_net_dev(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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#else
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return sprintf(buf, "%d\n", 0);
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#endif
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}
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static void set_priority(struct datapath *dp, unsigned long val)
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{
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#if 0
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br_stp_set_bridge_priority(br, (u16) val);
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#else
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printk("%s: xxx attempt to set_priority()\n", dp->netdev->name);
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#endif
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}
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static ssize_t store_priority(struct class_device *d,
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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 BRC_DEVICE_ATTR(priority, S_IRUGO | S_IWUSR, show_priority, store_priority);
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static ssize_t show_root_id(struct class_device *d,
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char *buf)
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{
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#if 0
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return br_show_bridge_id(buf, &to_bridge(d)->designated_root);
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#else
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return sprintf(buf, "0000.010203040506\n");
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#endif
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}
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static BRC_DEVICE_ATTR(root_id, S_IRUGO, show_root_id, NULL);
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static ssize_t show_bridge_id(struct class_device *d,
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char *buf)
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{
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struct datapath *dp = dp_dev_get_dp(to_net_dev(d));
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const unsigned char *addr = dp->netdev->dev_addr;
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/* xxx Do we need a lock of some sort? */
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return sprintf(buf, "%.2x%.2x.%.2x%.2x%.2x%.2x%.2x%.2x\n",
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0, 0, addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
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}
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static BRC_DEVICE_ATTR(bridge_id, S_IRUGO, show_bridge_id, NULL);
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static ssize_t show_root_port(struct class_device *d,
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char *buf)
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{
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#if 0
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return sprintf(buf, "%d\n", to_bridge(d)->root_port);
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#else
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return sprintf(buf, "%d\n", 0);
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#endif
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}
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static BRC_DEVICE_ATTR(root_port, S_IRUGO, show_root_port, NULL);
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static ssize_t show_root_path_cost(struct class_device *d,
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char *buf)
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{
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#if 0
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return sprintf(buf, "%d\n", to_bridge(d)->root_path_cost);
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#else
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return sprintf(buf, "%d\n", 0);
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#endif
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}
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static BRC_DEVICE_ATTR(root_path_cost, S_IRUGO, show_root_path_cost, NULL);
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static ssize_t show_topology_change(struct class_device *d,
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char *buf)
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{
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#if 0
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return sprintf(buf, "%d\n", to_bridge(d)->topology_change);
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#else
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return sprintf(buf, "%d\n", 0);
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#endif
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}
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static BRC_DEVICE_ATTR(topology_change, S_IRUGO, show_topology_change, NULL);
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static ssize_t show_topology_change_detected(struct class_device *d,
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char *buf)
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{
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#if 0
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struct datapath *dp = dp_dev_get_dp(to_net_dev(d));
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return sprintf(buf, "%d\n", br->topology_change_detected);
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#else
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return sprintf(buf, "%d\n", 0);
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#endif
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}
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static BRC_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 class_device *d,
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char *buf)
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{
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#if 0
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struct datapath *dp = dp_dev_get_dp(to_net_dev(d));
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return sprintf(buf, "%ld\n", br_timer_value(&br->hello_timer));
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#else
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return sprintf(buf, "%d\n", 0);
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#endif
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}
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static BRC_DEVICE_ATTR(hello_timer, S_IRUGO, show_hello_timer, NULL);
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static ssize_t show_tcn_timer(struct class_device *d,
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char *buf)
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{
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#if 0
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struct datapath *dp = dp_dev_get_dp(to_net_dev(d));
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return sprintf(buf, "%ld\n", br_timer_value(&br->tcn_timer));
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#else
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return sprintf(buf, "%d\n", 0);
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#endif
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}
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static BRC_DEVICE_ATTR(tcn_timer, S_IRUGO, show_tcn_timer, NULL);
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static ssize_t show_topology_change_timer(struct class_device *d,
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char *buf)
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{
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#if 0
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struct datapath *dp = dp_dev_get_dp(to_net_dev(d));
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return sprintf(buf, "%ld\n", br_timer_value(&br->topology_change_timer));
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#else
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return sprintf(buf, "%d\n", 0);
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#endif
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}
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static BRC_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 class_device *d,
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char *buf)
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{
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#if 0
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struct datapath *dp = dp_dev_get_dp(to_net_dev(d));
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return sprintf(buf, "%ld\n", br_timer_value(&br->gc_timer));
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#else
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return sprintf(buf, "%d\n", 0);
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#endif
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}
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static BRC_DEVICE_ATTR(gc_timer, S_IRUGO, show_gc_timer, NULL);
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static ssize_t show_group_addr(struct class_device *d,
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char *buf)
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{
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#if 0
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struct datapath *dp = dp_dev_get_dp(to_net_dev(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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#else
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return sprintf(buf, "00:01:02:03:04:05\n");
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#endif
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}
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static ssize_t store_group_addr(struct class_device *d,
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const char *buf, size_t len)
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{
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struct datapath *dp = dp_dev_get_dp(to_net_dev(d));
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#if 0
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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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#else
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printk("%s: xxx attempt to store_group_addr()\n", dp->netdev->name);
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#endif
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return len;
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}
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static BRC_DEVICE_ATTR(group_addr, S_IRUGO | S_IWUSR,
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show_group_addr, store_group_addr);
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static struct attribute *bridge_attrs[] = {
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&class_device_attr_forward_delay.attr,
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&class_device_attr_hello_time.attr,
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&class_device_attr_max_age.attr,
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&class_device_attr_ageing_time.attr,
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&class_device_attr_stp_state.attr,
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&class_device_attr_priority.attr,
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&class_device_attr_bridge_id.attr,
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&class_device_attr_root_id.attr,
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&class_device_attr_root_path_cost.attr,
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&class_device_attr_root_port.attr,
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&class_device_attr_topology_change.attr,
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&class_device_attr_topology_change_detected.attr,
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&class_device_attr_hello_timer.attr,
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&class_device_attr_tcn_timer.attr,
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&class_device_attr_topology_change_timer.attr,
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&class_device_attr_gc_timer.attr,
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&class_device_attr_group_addr.attr,
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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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* Add entries in sysfs onto the existing network class device
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* for the bridge.
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* Adds a attribute group "bridge" containing tuning parameters.
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* Sub directory to hold links to interfaces.
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*
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* Note: the ifobj exists only to be a subdirectory
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* to hold links. The ifobj exists in the same data structure
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* as its parent the bridge so reference counting works.
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*/
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int brc_sysfs_add_dp(struct datapath *dp)
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{
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struct net_device *dev = dp->netdev;
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struct kobject *kobj = to_kobj(dev);
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int err;
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err = sysfs_create_group(kobj, &bridge_group);
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if (err) {
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pr_info("%s: can't create group %s/%s\n",
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__func__, dev->name, bridge_group.name);
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goto out1;
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}
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,25)
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kobject_set_name(&dp->ifobj, SYSFS_BRIDGE_PORT_SUBDIR);
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dp->ifobj.ktype = NULL;
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dp->ifobj.kset = NULL;
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dp->ifobj.parent = kobj;
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err = kobject_register(&dp->ifobj);
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if (err) {
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pr_info("%s: can't add kobject (directory) %s/%s\n",
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__FUNCTION__, dev->name, dp->ifobj.name);
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goto out2;
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}
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#else
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br->ifobj = kobject_create_and_add(SYSFS_BRIDGE_PORT_SUBDIR, kobj);
|
|
if (!br->ifobj) {
|
|
pr_info("%s: can't add kobject (directory) %s/%s\n",
|
|
__func__, dev->name, SYSFS_BRIDGE_PORT_SUBDIR);
|
|
goto out2;
|
|
}
|
|
#endif
|
|
return 0;
|
|
|
|
out2:
|
|
sysfs_remove_group(to_kobj(dev), &bridge_group);
|
|
out1:
|
|
return err;
|
|
}
|
|
|
|
int brc_sysfs_del_dp(struct datapath *dp)
|
|
{
|
|
struct net_device *dev = dp->netdev;
|
|
struct kobject *kobj = to_kobj(dev);
|
|
|
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,25)
|
|
kobject_unregister(&dp->ifobj);
|
|
#else
|
|
kobject_put(dp->ifobj);
|
|
#endif
|
|
sysfs_remove_group(kobj, &bridge_group);
|
|
|
|
return 0;
|
|
}
|
|
#endif /* Only support 2.6.18 */
|