--- /dev/null
+/*
+ * Copyright (c) 2009 Nicira Networks.
+ * Distributed under the terms of the GNU GPL version 2.
+ *
+ * Significant portions of this file may be copied from parts of the Linux
+ * kernel, by Linus Torvalds and others.
+ */
+
+#include <linux/version.h>
+
+/*
+ * Sysfs attributes of bridge for Open vSwitch
+ *
+ * This has been shamelessly copied from the kernel sources.
+ */
+
+#include <linux/capability.h>
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+#include <linux/if_bridge.h>
+#include <linux/rtnetlink.h>
+#include <linux/spinlock.h>
+#include <linux/times.h>
+#include <linux/version.h>
+
+#include "dp_sysfs.h"
+#include "datapath.h"
+#include "dp_dev.h"
+
+#ifdef SUPPORT_SYSFS
+#define to_dev(obj) container_of(obj, struct device, kobj)
+
+/* Hack to attempt to build on more platforms. */
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,21)
+#define to_kobj(d) &(d)->class_dev.kobj
+#define DP_DEVICE_ATTR CLASS_DEVICE_ATTR
+#else
+#define to_kobj(d) &(d)->dev.kobj
+#define DP_DEVICE_ATTR DEVICE_ATTR
+#endif
+
+/*
+ * Common code for storing bridge parameters.
+ */
+static ssize_t store_bridge_parm(struct class_device *d,
+ const char *buf, size_t len,
+ void (*set)(struct datapath *, unsigned long))
+{
+ struct datapath *dp = dp_dev_get_dp(to_net_dev(d));
+ char *endp;
+ unsigned long val;
+
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+
+ val = simple_strtoul(buf, &endp, 0);
+ if (endp == buf)
+ return -EINVAL;
+
+#if 0
+ spin_lock_bh(&br->lock);
+ (*set)(br, val);
+ spin_unlock_bh(&br->lock);
+#else
+ /* xxx We use a default value of 0 for all fields. If the caller is
+ * xxx attempting to set the value to our default, just silently
+ * xxx ignore the request.
+ */
+ if (val != 0) {
+ printk("%s: xxx writing dp parms not supported yet!\n",
+ dp_name(dp));
+ }
+#endif
+ return len;
+}
+
+
+static ssize_t show_forward_delay(struct class_device *d,
+ char *buf)
+{
+#if 0
+ struct datapath *dp = dp_dev_get_dp(to_net_dev(d));
+ return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->forward_delay));
+#else
+ return sprintf(buf, "%d\n", 0);
+#endif
+}
+
+static void set_forward_delay(struct datapath *dp, unsigned long val)
+{
+#if 0
+ unsigned long delay = clock_t_to_jiffies(val);
+ br->forward_delay = delay;
+ if (br_is_root_bridge(br))
+ br->bridge_forward_delay = delay;
+#else
+ printk("%s: xxx attempt to set_forward_delay()\n", dp_name(dp));
+#endif
+}
+
+static ssize_t store_forward_delay(struct class_device *d,
+ const char *buf, size_t len)
+{
+ return store_bridge_parm(d, buf, len, set_forward_delay);
+}
+static DP_DEVICE_ATTR(forward_delay, S_IRUGO | S_IWUSR,
+ show_forward_delay, store_forward_delay);
+
+static ssize_t show_hello_time(struct class_device *d, char *buf)
+{
+#if 0
+ return sprintf(buf, "%lu\n",
+ jiffies_to_clock_t(to_bridge(d)->hello_time));
+#else
+ return sprintf(buf, "%d\n", 0);
+#endif
+}
+
+static void set_hello_time(struct datapath *dp, unsigned long val)
+{
+#if 0
+ unsigned long t = clock_t_to_jiffies(val);
+ br->hello_time = t;
+ if (br_is_root_bridge(br))
+ br->bridge_hello_time = t;
+#else
+ printk("%s: xxx attempt to set_hello_time()\n", dp_name(dp));
+#endif
+}
+
+static ssize_t store_hello_time(struct class_device *d,
+ const char *buf,
+ size_t len)
+{
+ return store_bridge_parm(d, buf, len, set_hello_time);
+}
+static DP_DEVICE_ATTR(hello_time, S_IRUGO | S_IWUSR, show_hello_time,
+ store_hello_time);
+
+static ssize_t show_max_age(struct class_device *d,
+ char *buf)
+{
+#if 0
+ return sprintf(buf, "%lu\n",
+ jiffies_to_clock_t(to_bridge(d)->max_age));
+#else
+ return sprintf(buf, "%d\n", 0);
+#endif
+}
+
+static void set_max_age(struct datapath *dp, unsigned long val)
+{
+#if 0
+ unsigned long t = clock_t_to_jiffies(val);
+ br->max_age = t;
+ if (br_is_root_bridge(br))
+ br->bridge_max_age = t;
+#else
+ printk("%s: xxx attempt to set_max_age()\n", dp_name(dp));
+#endif
+}
+
+static ssize_t store_max_age(struct class_device *d,
+ const char *buf, size_t len)
+{
+ return store_bridge_parm(d, buf, len, set_max_age);
+}
+static DP_DEVICE_ATTR(max_age, S_IRUGO | S_IWUSR, show_max_age, store_max_age);
+
+static ssize_t show_ageing_time(struct class_device *d,
+ char *buf)
+{
+#if 0
+ struct datapath *dp = dp_dev_get_dp(to_net_dev(d));
+ return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->ageing_time));
+#else
+ return sprintf(buf, "%d\n", 0);
+#endif
+}
+
+static void set_ageing_time(struct datapath *dp, unsigned long val)
+{
+#if 0
+ br->ageing_time = clock_t_to_jiffies(val);
+#else
+ printk("%s: xxx attempt to set_ageing_time()\n", dp_name(dp));
+#endif
+}
+
+static ssize_t store_ageing_time(struct class_device *d,
+ const char *buf, size_t len)
+{
+ return store_bridge_parm(d, buf, len, set_ageing_time);
+}
+static DP_DEVICE_ATTR(ageing_time, S_IRUGO | S_IWUSR, show_ageing_time,
+ store_ageing_time);
+
+static ssize_t show_stp_state(struct class_device *d,
+ char *buf)
+{
+#if 0
+ struct datapath *dp = dp_dev_get_dp(to_net_dev(d));
+ return sprintf(buf, "%d\n", br->stp_enabled);
+#else
+ return sprintf(buf, "%d\n", 0);
+#endif
+}
+
+
+static ssize_t store_stp_state(struct class_device *d,
+ const char *buf,
+ size_t len)
+{
+ struct datapath *dp = dp_dev_get_dp(to_net_dev(d));
+#if 0
+ char *endp;
+ unsigned long val;
+
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+
+ val = simple_strtoul(buf, &endp, 0);
+ if (endp == buf)
+ return -EINVAL;
+
+ rtnl_lock();
+ br_stp_set_enabled(br, val);
+ rtnl_unlock();
+#else
+ printk("%s: xxx attempt to set_stp_state()\n", dp_name(dp));
+#endif
+
+ return len;
+}
+static DP_DEVICE_ATTR(stp_state, S_IRUGO | S_IWUSR, show_stp_state,
+ store_stp_state);
+
+static ssize_t show_priority(struct class_device *d,
+ char *buf)
+{
+#if 0
+ struct datapath *dp = dp_dev_get_dp(to_net_dev(d));
+ return sprintf(buf, "%d\n",
+ (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1]);
+#else
+ return sprintf(buf, "%d\n", 0);
+#endif
+}
+
+static void set_priority(struct datapath *dp, unsigned long val)
+{
+#if 0
+ br_stp_set_bridge_priority(br, (u16) val);
+#else
+ printk("%s: xxx attempt to set_priority()\n", dp_name(dp));
+#endif
+}
+
+static ssize_t store_priority(struct class_device *d,
+ const char *buf, size_t len)
+{
+ return store_bridge_parm(d, buf, len, set_priority);
+}
+static DP_DEVICE_ATTR(priority, S_IRUGO | S_IWUSR, show_priority, store_priority);
+
+static ssize_t show_root_id(struct class_device *d,
+ char *buf)
+{
+#if 0
+ return br_show_bridge_id(buf, &to_bridge(d)->designated_root);
+#else
+ return sprintf(buf, "0000.010203040506\n");
+#endif
+}
+static DP_DEVICE_ATTR(root_id, S_IRUGO, show_root_id, NULL);
+
+static ssize_t show_bridge_id(struct class_device *d,
+ char *buf)
+{
+ struct datapath *dp = dp_dev_get_dp(to_net_dev(d));
+ const unsigned char *addr = dp->ports[ODPP_LOCAL]->dev->dev_addr;
+
+ /* xxx Do we need a lock of some sort? */
+ return sprintf(buf, "%.2x%.2x.%.2x%.2x%.2x%.2x%.2x%.2x\n",
+ 0, 0, addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
+}
+static DP_DEVICE_ATTR(bridge_id, S_IRUGO, show_bridge_id, NULL);
+
+static ssize_t show_root_port(struct class_device *d,
+ char *buf)
+{
+#if 0
+ return sprintf(buf, "%d\n", to_bridge(d)->root_port);
+#else
+ return sprintf(buf, "%d\n", 0);
+#endif
+}
+static DP_DEVICE_ATTR(root_port, S_IRUGO, show_root_port, NULL);
+
+static ssize_t show_root_path_cost(struct class_device *d,
+ char *buf)
+{
+#if 0
+ return sprintf(buf, "%d\n", to_bridge(d)->root_path_cost);
+#else
+ return sprintf(buf, "%d\n", 0);
+#endif
+}
+static DP_DEVICE_ATTR(root_path_cost, S_IRUGO, show_root_path_cost, NULL);
+
+static ssize_t show_topology_change(struct class_device *d,
+ char *buf)
+{
+#if 0
+ return sprintf(buf, "%d\n", to_bridge(d)->topology_change);
+#else
+ return sprintf(buf, "%d\n", 0);
+#endif
+}
+static DP_DEVICE_ATTR(topology_change, S_IRUGO, show_topology_change, NULL);
+
+static ssize_t show_topology_change_detected(struct class_device *d,
+ char *buf)
+{
+#if 0
+ struct datapath *dp = dp_dev_get_dp(to_net_dev(d));
+ return sprintf(buf, "%d\n", br->topology_change_detected);
+#else
+ return sprintf(buf, "%d\n", 0);
+#endif
+}
+static DP_DEVICE_ATTR(topology_change_detected, S_IRUGO,
+ show_topology_change_detected, NULL);
+
+static ssize_t show_hello_timer(struct class_device *d,
+ char *buf)
+{
+#if 0
+ struct datapath *dp = dp_dev_get_dp(to_net_dev(d));
+ return sprintf(buf, "%ld\n", br_timer_value(&br->hello_timer));
+#else
+ return sprintf(buf, "%d\n", 0);
+#endif
+}
+static DP_DEVICE_ATTR(hello_timer, S_IRUGO, show_hello_timer, NULL);
+
+static ssize_t show_tcn_timer(struct class_device *d,
+ char *buf)
+{
+#if 0
+ struct datapath *dp = dp_dev_get_dp(to_net_dev(d));
+ return sprintf(buf, "%ld\n", br_timer_value(&br->tcn_timer));
+#else
+ return sprintf(buf, "%d\n", 0);
+#endif
+}
+static DP_DEVICE_ATTR(tcn_timer, S_IRUGO, show_tcn_timer, NULL);
+
+static ssize_t show_topology_change_timer(struct class_device *d,
+ char *buf)
+{
+#if 0
+ struct datapath *dp = dp_dev_get_dp(to_net_dev(d));
+ return sprintf(buf, "%ld\n", br_timer_value(&br->topology_change_timer));
+#else
+ return sprintf(buf, "%d\n", 0);
+#endif
+}
+static DP_DEVICE_ATTR(topology_change_timer, S_IRUGO, show_topology_change_timer,
+ NULL);
+
+static ssize_t show_gc_timer(struct class_device *d,
+ char *buf)
+{
+#if 0
+ struct datapath *dp = dp_dev_get_dp(to_net_dev(d));
+ return sprintf(buf, "%ld\n", br_timer_value(&br->gc_timer));
+#else
+ return sprintf(buf, "%d\n", 0);
+#endif
+}
+static DP_DEVICE_ATTR(gc_timer, S_IRUGO, show_gc_timer, NULL);
+
+static ssize_t show_group_addr(struct class_device *d,
+ char *buf)
+{
+#if 0
+ struct datapath *dp = dp_dev_get_dp(to_net_dev(d));
+ return sprintf(buf, "%x:%x:%x:%x:%x:%x\n",
+ br->group_addr[0], br->group_addr[1],
+ br->group_addr[2], br->group_addr[3],
+ br->group_addr[4], br->group_addr[5]);
+#else
+ return sprintf(buf, "00:01:02:03:04:05\n");
+#endif
+}
+
+static ssize_t store_group_addr(struct class_device *d,
+ const char *buf, size_t len)
+{
+ struct datapath *dp = dp_dev_get_dp(to_net_dev(d));
+#if 0
+ unsigned new_addr[6];
+ int i;
+
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+
+ if (sscanf(buf, "%x:%x:%x:%x:%x:%x",
+ &new_addr[0], &new_addr[1], &new_addr[2],
+ &new_addr[3], &new_addr[4], &new_addr[5]) != 6)
+ return -EINVAL;
+
+ /* Must be 01:80:c2:00:00:0X */
+ for (i = 0; i < 5; i++)
+ if (new_addr[i] != br_group_address[i])
+ return -EINVAL;
+
+ if (new_addr[5] & ~0xf)
+ return -EINVAL;
+
+ if (new_addr[5] == 1 /* 802.3x Pause address */
+ || new_addr[5] == 2 /* 802.3ad Slow protocols */
+ || new_addr[5] == 3) /* 802.1X PAE address */
+ return -EINVAL;
+
+ spin_lock_bh(&br->lock);
+ for (i = 0; i < 6; i++)
+ br->group_addr[i] = new_addr[i];
+ spin_unlock_bh(&br->lock);
+#else
+ printk("%s: xxx attempt to store_group_addr()\n", dp_name(dp));
+#endif
+ return len;
+}
+
+static DP_DEVICE_ATTR(group_addr, S_IRUGO | S_IWUSR,
+ show_group_addr, store_group_addr);
+
+static struct attribute *bridge_attrs[] = {
+ &class_device_attr_forward_delay.attr,
+ &class_device_attr_hello_time.attr,
+ &class_device_attr_max_age.attr,
+ &class_device_attr_ageing_time.attr,
+ &class_device_attr_stp_state.attr,
+ &class_device_attr_priority.attr,
+ &class_device_attr_bridge_id.attr,
+ &class_device_attr_root_id.attr,
+ &class_device_attr_root_path_cost.attr,
+ &class_device_attr_root_port.attr,
+ &class_device_attr_topology_change.attr,
+ &class_device_attr_topology_change_detected.attr,
+ &class_device_attr_hello_timer.attr,
+ &class_device_attr_tcn_timer.attr,
+ &class_device_attr_topology_change_timer.attr,
+ &class_device_attr_gc_timer.attr,
+ &class_device_attr_group_addr.attr,
+ NULL
+};
+
+static struct attribute_group bridge_group = {
+ .name = SYSFS_BRIDGE_ATTR,
+ .attrs = bridge_attrs,
+};
+
+/*
+ * Add entries in sysfs onto the existing network class device
+ * for the bridge.
+ * Adds a attribute group "bridge" containing tuning parameters.
+ * Sub directory to hold links to interfaces.
+ *
+ * Note: the ifobj exists only to be a subdirectory
+ * to hold links. The ifobj exists in the same data structure
+ * as its parent the bridge so reference counting works.
+ */
+int dp_sysfs_add_dp(struct datapath *dp)
+{
+ struct kobject *kobj = to_kobj(dp->ports[ODPP_LOCAL]->dev);
+ int err;
+
+ err = sysfs_create_group(kobj, &bridge_group);
+ if (err) {
+ pr_info("%s: can't create group %s/%s\n",
+ __func__, dp_name(dp), bridge_group.name);
+ goto out1;
+ }
+
+ /* Create /sys/class/net/<devname>/bridge directory. */
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,25)
+ kobject_set_name(&dp->ifobj, SYSFS_BRIDGE_PORT_SUBDIR); /* "bridge" */
+ dp->ifobj.ktype = NULL;
+ dp->ifobj.kset = NULL;
+ dp->ifobj.parent = kobj;
+
+ err = kobject_register(&dp->ifobj);
+ if (err) {
+ pr_info("%s: can't add kobject (directory) %s/%s\n",
+ __FUNCTION__, dp_name(dp), dp->ifobj.name);
+ goto out2;
+ }
+#else
+ 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__, dp_name(dp), SYSFS_BRIDGE_PORT_SUBDIR);
+ goto out2;
+ }
+#endif
+ return 0;
+
+ out2:
+ sysfs_remove_group(kobj, &bridge_group);
+ out1:
+ return err;
+}
+
+int dp_sysfs_del_dp(struct datapath *dp)
+{
+ struct kobject *kobj = to_kobj(dp->ports[ODPP_LOCAL]->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;
+}
+#else /* !SUPPORT_SYSFS */
+int dp_sysfs_add_dp(struct datapath *dp) { return 0; }
+int dp_sysfs_del_dp(struct datapath *dp) { return 0; }
+int dp_sysfs_add_if(struct net_bridge_port *p) { return 0; }
+int dp_sysfs_del_if(struct net_bridge_port *p)
+{
+ dev_put(p->dev);
+ kfree(p);
+ return 0;
+}
+#endif /* !SUPPORT_SYSFS */
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