diff options
author | Ben Pfaff <blp@nicira.com> | 2009-08-05 12:56:23 -0700 |
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committer | Ben Pfaff <blp@nicira.com> | 2009-08-06 16:57:06 -0700 |
commit | 2ba9026e2fc114fa50ae923312340e9f08a1f513 (patch) | |
tree | e692bdcd916a17073dbf55b8ad30ec5f6ec34882 /datapath/dp_sysfs_if.c | |
parent | 2e7dd8eca88d131112a76301da24709b0472e381 (diff) |
datapath: Rename brc_sysfs_* to dp_sysfs_*.
These files and names are now part of the datapath, not brcompat, so name
them appropriately so as not to confuse anyone.
Diffstat (limited to 'datapath/dp_sysfs_if.c')
-rw-r--r-- | datapath/dp_sysfs_if.c | 348 |
1 files changed, 348 insertions, 0 deletions
diff --git a/datapath/dp_sysfs_if.c b/datapath/dp_sysfs_if.c new file mode 100644 index 00000000..f118818b --- /dev/null +++ b/datapath/dp_sysfs_if.c @@ -0,0 +1,348 @@ +/* + * 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. + */ + +/* + * Sysfs attributes of bridge ports for Open vSwitch + * + * This has been shamelessly copied from the kernel sources. + */ + +#include <linux/capability.h> +#include <linux/kernel.h> +#include <linux/netdevice.h> +#include <linux/if_bridge.h> +#include <linux/rtnetlink.h> +#include <linux/spinlock.h> +#include "dp_sysfs.h" +#include "datapath.h" + +#ifdef SUPPORT_SYSFS + +struct brport_attribute { + struct attribute attr; + ssize_t (*show)(struct net_bridge_port *, char *); + ssize_t (*store)(struct net_bridge_port *, unsigned long); +}; + +#define BRPORT_ATTR(_name,_mode,_show,_store) \ +struct brport_attribute brport_attr_##_name = { \ + .attr = {.name = __stringify(_name), \ + .mode = _mode, \ + .owner = THIS_MODULE, }, \ + .show = _show, \ + .store = _store, \ +}; + +static ssize_t show_path_cost(struct net_bridge_port *p, char *buf) +{ +#if 0 + return sprintf(buf, "%d\n", p->path_cost); +#else + return sprintf(buf, "%d\n", 0); +#endif +} +static ssize_t store_path_cost(struct net_bridge_port *p, unsigned long v) +{ +#if 0 + br_stp_set_path_cost(p, v); +#endif + return 0; +} +static BRPORT_ATTR(path_cost, S_IRUGO | S_IWUSR, + show_path_cost, store_path_cost); + +static ssize_t show_priority(struct net_bridge_port *p, char *buf) +{ +#if 0 + return sprintf(buf, "%d\n", p->priority); +#else + return sprintf(buf, "%d\n", 0); +#endif +} +static ssize_t store_priority(struct net_bridge_port *p, unsigned long v) +{ +#if 0 + if (v >= (1<<(16-BR_PORT_BITS))) + return -ERANGE; + br_stp_set_port_priority(p, v); +#endif + return 0; +} +static BRPORT_ATTR(priority, S_IRUGO | S_IWUSR, + show_priority, store_priority); + +static ssize_t show_designated_root(struct net_bridge_port *p, char *buf) +{ +#if 0 + return br_show_bridge_id(buf, &p->designated_root); +#else + return sprintf(buf, "0000.010203040506\n"); +#endif +} +static BRPORT_ATTR(designated_root, S_IRUGO, show_designated_root, NULL); + +static ssize_t show_designated_bridge(struct net_bridge_port *p, char *buf) +{ +#if 0 + return br_show_bridge_id(buf, &p->designated_bridge); +#else + return sprintf(buf, "0000.060504030201\n"); +#endif +} +static BRPORT_ATTR(designated_bridge, S_IRUGO, show_designated_bridge, NULL); + +static ssize_t show_designated_port(struct net_bridge_port *p, char *buf) +{ +#if 0 + return sprintf(buf, "%d\n", p->designated_port); +#else + return sprintf(buf, "%d\n", 0); +#endif +} +static BRPORT_ATTR(designated_port, S_IRUGO, show_designated_port, NULL); + +static ssize_t show_designated_cost(struct net_bridge_port *p, char *buf) +{ +#if 0 + return sprintf(buf, "%d\n", p->designated_cost); +#else + return sprintf(buf, "%d\n", 0); +#endif +} +static BRPORT_ATTR(designated_cost, S_IRUGO, show_designated_cost, NULL); + +static ssize_t show_port_id(struct net_bridge_port *p, char *buf) +{ +#if 0 + return sprintf(buf, "0x%x\n", p->port_id); +#else + return sprintf(buf, "0x%x\n", 0); +#endif +} +static BRPORT_ATTR(port_id, S_IRUGO, show_port_id, NULL); + +static ssize_t show_port_no(struct net_bridge_port *p, char *buf) +{ + return sprintf(buf, "0x%x\n", p->port_no); +} + +static BRPORT_ATTR(port_no, S_IRUGO, show_port_no, NULL); + +static ssize_t show_change_ack(struct net_bridge_port *p, char *buf) +{ +#if 0 + return sprintf(buf, "%d\n", p->topology_change_ack); +#else + return sprintf(buf, "%d\n", 0); +#endif +} +static BRPORT_ATTR(change_ack, S_IRUGO, show_change_ack, NULL); + +static ssize_t show_config_pending(struct net_bridge_port *p, char *buf) +{ +#if 0 + return sprintf(buf, "%d\n", p->config_pending); +#else + return sprintf(buf, "%d\n", 0); +#endif +} +static BRPORT_ATTR(config_pending, S_IRUGO, show_config_pending, NULL); + +static ssize_t show_port_state(struct net_bridge_port *p, char *buf) +{ +#if 0 + return sprintf(buf, "%d\n", p->state); +#else + return sprintf(buf, "%d\n", 0); +#endif +} +static BRPORT_ATTR(state, S_IRUGO, show_port_state, NULL); + +static ssize_t show_message_age_timer(struct net_bridge_port *p, + char *buf) +{ +#if 0 + return sprintf(buf, "%ld\n", br_timer_value(&p->message_age_timer)); +#else + return sprintf(buf, "%d\n", 0); +#endif +} +static BRPORT_ATTR(message_age_timer, S_IRUGO, show_message_age_timer, NULL); + +static ssize_t show_forward_delay_timer(struct net_bridge_port *p, + char *buf) +{ +#if 0 + return sprintf(buf, "%ld\n", br_timer_value(&p->forward_delay_timer)); +#else + return sprintf(buf, "%d\n", 0); +#endif +} +static BRPORT_ATTR(forward_delay_timer, S_IRUGO, show_forward_delay_timer, NULL); + +static ssize_t show_hold_timer(struct net_bridge_port *p, + char *buf) +{ +#if 0 + return sprintf(buf, "%ld\n", br_timer_value(&p->hold_timer)); +#else + return sprintf(buf, "%d\n", 0); +#endif +} +static BRPORT_ATTR(hold_timer, S_IRUGO, show_hold_timer, NULL); + +static struct brport_attribute *brport_attrs[] = { + &brport_attr_path_cost, + &brport_attr_priority, + &brport_attr_port_id, + &brport_attr_port_no, + &brport_attr_designated_root, + &brport_attr_designated_bridge, + &brport_attr_designated_port, + &brport_attr_designated_cost, + &brport_attr_state, + &brport_attr_change_ack, + &brport_attr_config_pending, + &brport_attr_message_age_timer, + &brport_attr_forward_delay_timer, + &brport_attr_hold_timer, + NULL +}; + +#define to_brport_attr(_at) container_of(_at, struct brport_attribute, attr) +#define to_brport(obj) container_of(obj, struct net_bridge_port, kobj) + +static ssize_t brport_show(struct kobject * kobj, + struct attribute * attr, char * buf) +{ + struct brport_attribute * brport_attr = to_brport_attr(attr); + struct net_bridge_port * p = to_brport(kobj); + + return brport_attr->show(p, buf); +} + +static ssize_t brport_store(struct kobject * kobj, + struct attribute * attr, + const char * buf, size_t count) +{ + struct net_bridge_port * p = to_brport(kobj); +#if 0 + struct brport_attribute * brport_attr = to_brport_attr(attr); + char *endp; + unsigned long val; +#endif + ssize_t ret = -EINVAL; + + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + +#if 0 + val = simple_strtoul(buf, &endp, 0); + if (endp != buf) { + rtnl_lock(); + if (p->dev && p->br && brport_attr->store) { + spin_lock_bh(&p->br->lock); + ret = brport_attr->store(p, val); + spin_unlock_bh(&p->br->lock); + if (ret == 0) + ret = count; + } + rtnl_unlock(); + } +#else + printk("%s: xxx writing port parms not supported yet!\n", + dp_name(p->dp)); +#endif + return ret; +} + +struct sysfs_ops brport_sysfs_ops = { + .show = brport_show, + .store = brport_store, +}; + +static void release_nbp(struct kobject *kobj) +{ + struct net_bridge_port *p + = container_of(kobj, struct net_bridge_port, kobj); + kfree(p); +} + +struct kobj_type brport_ktype = { + .sysfs_ops = &brport_sysfs_ops, + .release = release_nbp +}; + +/* + * Add sysfs entries to ethernet device added to a bridge. + * Creates a brport subdirectory with bridge attributes. + * Puts symlink in bridge's brport subdirectory + */ +int dp_sysfs_add_if(struct net_bridge_port *p) +{ + struct datapath *dp = p->dp; + struct brport_attribute **a; + int err; + + /* Create /sys/class/net/<devname>/brport directory. */ + kobject_init(&p->kobj); + kobject_set_name(&p->kobj, SYSFS_BRIDGE_PORT_ATTR); /* "brport" */ + p->kobj.ktype = &brport_ktype; + p->kobj.kset = NULL; + p->kobj.parent = &(p->dev->class_dev.kobj); + + err = kobject_add(&p->kobj); + if (err) + goto err_put; + + /* Create symlink from /sys/class/net/<devname>/brport/bridge to + * /sys/class/net/<bridgename>. */ + err = sysfs_create_link(&p->kobj, + &dp->ports[ODPP_LOCAL]->dev->class_dev.kobj, + SYSFS_BRIDGE_PORT_LINK); /* "bridge" */ + if (err) + goto err_del; + + /* Populate /sys/class/net/<devname>/brport directory with files. */ + for (a = brport_attrs; *a; ++a) { + err = sysfs_create_file(&p->kobj, &((*a)->attr)); + if (err) + goto err_del; + } + + /* Create symlink from /sys/class/net/<bridgename>/brif/<devname> to + * /sys/class/net/<devname>/brport. */ + err = sysfs_create_link(&dp->ifobj, &p->kobj, p->dev->name); + if (err) + goto err_del; + + kobject_uevent(&p->kobj, KOBJ_ADD); + + return err; + +err_del: + kobject_del(&p->kobj); +err_put: + kobject_put(&p->kobj); + return err; +} + +int dp_sysfs_del_if(struct net_bridge_port *p) +{ + struct net_device *dev = p->dev; + + kobject_uevent(&p->kobj, KOBJ_REMOVE); + kobject_del(&p->kobj); + + dev_put(dev); + + kobject_put(&p->kobj); + + return 0; +} +#endif /* SUPPORT_SYSFS */ |