diff options
Diffstat (limited to 'datapath/brc_sysfs_dp.c')
| -rw-r--r-- | datapath/brc_sysfs_dp.c | 532 |
1 files changed, 532 insertions, 0 deletions
diff --git a/datapath/brc_sysfs_dp.c b/datapath/brc_sysfs_dp.c new file mode 100644 index 000000000..fc02f2794 --- /dev/null +++ b/datapath/brc_sysfs_dp.c @@ -0,0 +1,532 @@ +#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 "brc_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 BRC_DEVICE_ATTR CLASS_DEVICE_ATTR +#else +#define to_kobj(d) &(d)->dev.kobj +#define BRC_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 BRC_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 BRC_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 BRC_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 BRC_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 BRC_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 BRC_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 BRC_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 BRC_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 BRC_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 BRC_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 BRC_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 BRC_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 BRC_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 BRC_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 BRC_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 BRC_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 BRC_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 brc_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; + } + +#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,25) + kobject_set_name(&dp->ifobj, SYSFS_BRIDGE_PORT_SUBDIR); + 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 brc_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 brc_sysfs_add_dp(struct datapath *dp) { return 0; } +int brc_sysfs_del_dp(struct datapath *dp) { return 0; } +int brc_sysfs_add_if(struct net_bridge_port *p) { return 0; } +int brc_sysfs_del_if(struct net_bridge_port *p) +{ + dev_put(p->dev); + kfree(p); + return 0; +} +#endif /* !SUPPORT_SYSFS */ |