linux/net/bridge/br_sysfs_if.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *	Sysfs attributes of bridge ports
 *	Linux ethernet bridge
 *
 *	Authors:
 *	Stephen Hemminger		<[email protected]>
 */

#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 <linux/sched/signal.h>

#include "br_private.h"

/* IMPORTANT: new bridge port options must be added with netlink support only
 *            please do not add new sysfs entries
 */

struct brport_attribute { … };

#define BRPORT_ATTR_RAW(_name, _mode, _show, _store) …

#define BRPORT_ATTR(_name, _mode, _show, _store) …

#define BRPORT_ATTR_FLAG(_name, _mask) …

static int store_flag(struct net_bridge_port *p, unsigned long v,
		      unsigned long mask)
{ … }

static ssize_t show_path_cost(struct net_bridge_port *p, char *buf)
{ … }

static BRPORT_ATTR(path_cost, 0644,
		   show_path_cost, br_stp_set_path_cost);

static ssize_t show_priority(struct net_bridge_port *p, char *buf)
{ … }

static BRPORT_ATTR(priority, 0644,
			 show_priority, br_stp_set_port_priority);

static ssize_t show_designated_root(struct net_bridge_port *p, char *buf)
{ … }
static BRPORT_ATTR(designated_root, 0444, show_designated_root, NULL);

static ssize_t show_designated_bridge(struct net_bridge_port *p, char *buf)
{ … }
static BRPORT_ATTR(designated_bridge, 0444, show_designated_bridge, NULL);

static ssize_t show_designated_port(struct net_bridge_port *p, char *buf)
{ … }
static BRPORT_ATTR(designated_port, 0444, show_designated_port, NULL);

static ssize_t show_designated_cost(struct net_bridge_port *p, char *buf)
{ … }
static BRPORT_ATTR(designated_cost, 0444, show_designated_cost, NULL);

static ssize_t show_port_id(struct net_bridge_port *p, char *buf)
{ … }
static BRPORT_ATTR(port_id, 0444, show_port_id, NULL);

static ssize_t show_port_no(struct net_bridge_port *p, char *buf)
{ … }

static BRPORT_ATTR(port_no, 0444, show_port_no, NULL);

static ssize_t show_change_ack(struct net_bridge_port *p, char *buf)
{ … }
static BRPORT_ATTR(change_ack, 0444, show_change_ack, NULL);

static ssize_t show_config_pending(struct net_bridge_port *p, char *buf)
{ … }
static BRPORT_ATTR(config_pending, 0444, show_config_pending, NULL);

static ssize_t show_port_state(struct net_bridge_port *p, char *buf)
{ … }
static BRPORT_ATTR(state, 0444, show_port_state, NULL);

static ssize_t show_message_age_timer(struct net_bridge_port *p,
					    char *buf)
{ … }
static BRPORT_ATTR(message_age_timer, 0444, show_message_age_timer, NULL);

static ssize_t show_forward_delay_timer(struct net_bridge_port *p,
					    char *buf)
{ … }
static BRPORT_ATTR(forward_delay_timer, 0444, show_forward_delay_timer, NULL);

static ssize_t show_hold_timer(struct net_bridge_port *p,
					    char *buf)
{ … }
static BRPORT_ATTR(hold_timer, 0444, show_hold_timer, NULL);

static int store_flush(struct net_bridge_port *p, unsigned long v)
{ … }
static BRPORT_ATTR(flush, 0200, NULL, store_flush);

static ssize_t show_group_fwd_mask(struct net_bridge_port *p, char *buf)
{ … }

static int store_group_fwd_mask(struct net_bridge_port *p,
				unsigned long v)
{ … }
static BRPORT_ATTR(group_fwd_mask, 0644, show_group_fwd_mask,
		   store_group_fwd_mask);

static ssize_t show_backup_port(struct net_bridge_port *p, char *buf)
{ … }

static int store_backup_port(struct net_bridge_port *p, char *buf)
{ … }
static BRPORT_ATTR_RAW(backup_port, 0644, show_backup_port, store_backup_port);

BRPORT_ATTR_FLAG(hairpin_mode, BR_HAIRPIN_MODE);
BRPORT_ATTR_FLAG(bpdu_guard, BR_BPDU_GUARD);
BRPORT_ATTR_FLAG(root_block, BR_ROOT_BLOCK);
BRPORT_ATTR_FLAG(learning, BR_LEARNING);
BRPORT_ATTR_FLAG(unicast_flood, BR_FLOOD);
BRPORT_ATTR_FLAG(proxyarp, BR_PROXYARP);
BRPORT_ATTR_FLAG(proxyarp_wifi, BR_PROXYARP_WIFI);
BRPORT_ATTR_FLAG(multicast_flood, BR_MCAST_FLOOD);
BRPORT_ATTR_FLAG(broadcast_flood, BR_BCAST_FLOOD);
BRPORT_ATTR_FLAG(neigh_suppress, BR_NEIGH_SUPPRESS);
BRPORT_ATTR_FLAG(isolated, BR_ISOLATED);

#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
static ssize_t show_multicast_router(struct net_bridge_port *p, char *buf)
{ … }

static int store_multicast_router(struct net_bridge_port *p,
				      unsigned long v)
{ … }
static BRPORT_ATTR(multicast_router, 0644, show_multicast_router,
		   store_multicast_router);

BRPORT_ATTR_FLAG(multicast_fast_leave, BR_MULTICAST_FAST_LEAVE);
BRPORT_ATTR_FLAG(multicast_to_unicast, BR_MULTICAST_TO_UNICAST);
#endif

static const struct brport_attribute *brport_attrs[] = …;

#define to_brport_attr(_at) …

static ssize_t brport_show(struct kobject *kobj,
			   struct attribute *attr, char *buf)
{ … }

static ssize_t brport_store(struct kobject *kobj,
			    struct attribute *attr,
			    const char *buf, size_t count)
{ … }

const struct sysfs_ops brport_sysfs_ops = …;

/*
 * Add sysfs entries to ethernet device added to a bridge.
 * Creates a brport subdirectory with bridge attributes.
 * Puts symlink in bridge's brif subdirectory
 */
int br_sysfs_addif(struct net_bridge_port *p)
{ … }

/* Rename bridge's brif symlink */
int br_sysfs_renameif(struct net_bridge_port *p)
{ … }