cregit-Linux how code gets into the kernel

Release 4.11 net/bridge/br_sysfs_if.c

Directory: net/bridge
/*
 *      Sysfs attributes of bridge ports
 *      Linux ethernet bridge
 *
 *      Authors:
 *      Stephen Hemminger               <shemminger@osdl.org>
 *
 *      This program is free software; you can redistribute it and/or
 *      modify it under the terms of the GNU General Public License
 *      as published by the Free Software Foundation; either version
 *      2 of the License, or (at your option) any later version.
 */

#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"


struct brport_attribute {
	
struct attribute	attr;
	
ssize_t (*show)(struct net_bridge_port *, char *);
	
int (*store)(struct net_bridge_port *, unsigned long);
};


#define BRPORT_ATTR(_name, _mode, _show, _store)		\
const struct brport_attribute brport_attr_##_name = {           \
        .attr = {.name = __stringify(_name),                    \
                 .mode = _mode },                               \
        .show   = _show,                                        \
        .store  = _store,                                       \
};


#define BRPORT_ATTR_FLAG(_name, _mask)				\
static ssize_t show_##_name(struct net_bridge_port *p, char *buf) \
{                                                               \
        return sprintf(buf, "%d\n", !!(p->flags & _mask));      \
}                                                               \
static int store_##_name(struct net_bridge_port *p, unsigned long v) \
{                                                               \
        return store_flag(p, v, _mask);                         \
}                                                               \
static BRPORT_ATTR(_name, S_IRUGO | S_IWUSR,                    \
                   show_##_name, store_##_name)


static int store_flag(struct net_bridge_port *p, unsigned long v, unsigned long mask) { unsigned long flags; flags = p->flags; if (v) flags |= mask; else flags &= ~mask; if (flags != p->flags) { p->flags = flags; br_port_flags_change(p, mask); } return 0; }

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Vlad Yasevich69100.00%2100.00%
Total69100.00%2100.00%


static ssize_t show_path_cost(struct net_bridge_port *p, char *buf) { return sprintf(buf, "%d\n", p->path_cost); }

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PersonTokensPropCommitsCommitProp
Stephen Hemminger27100.00%1100.00%
Total27100.00%1100.00%

static BRPORT_ATTR(path_cost, S_IRUGO | S_IWUSR, show_path_cost, br_stp_set_path_cost);
static ssize_t show_priority(struct net_bridge_port *p, char *buf) { return sprintf(buf, "%d\n", p->priority); }

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PersonTokensPropCommitsCommitProp
Stephen Hemminger27100.00%1100.00%
Total27100.00%1100.00%

static BRPORT_ATTR(priority, S_IRUGO | S_IWUSR, show_priority, br_stp_set_port_priority);
static ssize_t show_designated_root(struct net_bridge_port *p, char *buf) { return br_show_bridge_id(buf, &p->designated_root); }

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PersonTokensPropCommitsCommitProp
Stephen Hemminger26100.00%1100.00%
Total26100.00%1100.00%

static BRPORT_ATTR(designated_root, S_IRUGO, show_designated_root, NULL);
static ssize_t show_designated_bridge(struct net_bridge_port *p, char *buf) { return br_show_bridge_id(buf, &p->designated_bridge); }

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PersonTokensPropCommitsCommitProp
Stephen Hemminger26100.00%1100.00%
Total26100.00%1100.00%

static BRPORT_ATTR(designated_bridge, S_IRUGO, show_designated_bridge, NULL);
static ssize_t show_designated_port(struct net_bridge_port *p, char *buf) { return sprintf(buf, "%d\n", p->designated_port); }

Contributors

PersonTokensPropCommitsCommitProp
Stephen Hemminger27100.00%1100.00%
Total27100.00%1100.00%

static BRPORT_ATTR(designated_port, S_IRUGO, show_designated_port, NULL);
static ssize_t show_designated_cost(struct net_bridge_port *p, char *buf) { return sprintf(buf, "%d\n", p->designated_cost); }

Contributors

PersonTokensPropCommitsCommitProp
Stephen Hemminger27100.00%1100.00%
Total27100.00%1100.00%

static BRPORT_ATTR(designated_cost, S_IRUGO, show_designated_cost, NULL);
static ssize_t show_port_id(struct net_bridge_port *p, char *buf) { return sprintf(buf, "0x%x\n", p->port_id); }

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PersonTokensPropCommitsCommitProp
Stephen Hemminger27100.00%1100.00%
Total27100.00%1100.00%

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); }

Contributors

PersonTokensPropCommitsCommitProp
Stephen Hemminger27100.00%1100.00%
Total27100.00%1100.00%

static BRPORT_ATTR(port_no, S_IRUGO, show_port_no, NULL);
static ssize_t show_change_ack(struct net_bridge_port *p, char *buf) { return sprintf(buf, "%d\n", p->topology_change_ack); }

Contributors

PersonTokensPropCommitsCommitProp
Stephen Hemminger27100.00%1100.00%
Total27100.00%1100.00%

static BRPORT_ATTR(change_ack, S_IRUGO, show_change_ack, NULL);
static ssize_t show_config_pending(struct net_bridge_port *p, char *buf) { return sprintf(buf, "%d\n", p->config_pending); }

Contributors

PersonTokensPropCommitsCommitProp
Stephen Hemminger27100.00%1100.00%
Total27100.00%1100.00%

static BRPORT_ATTR(config_pending, S_IRUGO, show_config_pending, NULL);
static ssize_t show_port_state(struct net_bridge_port *p, char *buf) { return sprintf(buf, "%d\n", p->state); }

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PersonTokensPropCommitsCommitProp
Stephen Hemminger27100.00%1100.00%
Total27100.00%1100.00%

static BRPORT_ATTR(state, S_IRUGO, show_port_state, NULL);
static ssize_t show_message_age_timer(struct net_bridge_port *p, char *buf) { return sprintf(buf, "%ld\n", br_timer_value(&p->message_age_timer)); }

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PersonTokensPropCommitsCommitProp
Stephen Hemminger31100.00%1100.00%
Total31100.00%1100.00%

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) { return sprintf(buf, "%ld\n", br_timer_value(&p->forward_delay_timer)); }

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PersonTokensPropCommitsCommitProp
Stephen Hemminger31100.00%1100.00%
Total31100.00%1100.00%

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) { return sprintf(buf, "%ld\n", br_timer_value(&p->hold_timer)); }

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PersonTokensPropCommitsCommitProp
Stephen Hemminger31100.00%1100.00%
Total31100.00%1100.00%

static BRPORT_ATTR(hold_timer, S_IRUGO, show_hold_timer, NULL);
static int store_flush(struct net_bridge_port *p, unsigned long v) { br_fdb_delete_by_port(p->br, p, 0, 0); // Don't delete local entry return 0; }

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PersonTokensPropCommitsCommitProp
Stephen Hemminger3093.75%266.67%
Nikolay Aleksandrov26.25%133.33%
Total32100.00%3100.00%

static BRPORT_ATTR(flush, S_IWUSR, NULL, store_flush); 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); #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
static ssize_t show_multicast_router(struct net_bridge_port *p, char *buf) { return sprintf(buf, "%d\n", p->multicast_router); }

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PersonTokensPropCommitsCommitProp
Herbert Xu27100.00%1100.00%
Total27100.00%1100.00%


static int store_multicast_router(struct net_bridge_port *p, unsigned long v) { return br_multicast_set_port_router(p, v); }

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PersonTokensPropCommitsCommitProp
Herbert Xu2295.65%150.00%
Stephen Hemminger14.35%150.00%
Total23100.00%2100.00%

static BRPORT_ATTR(multicast_router, S_IRUGO | S_IWUSR, 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[] = { &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, &brport_attr_flush, &brport_attr_hairpin_mode, &brport_attr_bpdu_guard, &brport_attr_root_block, &brport_attr_learning, &brport_attr_unicast_flood, #ifdef CONFIG_BRIDGE_IGMP_SNOOPING &brport_attr_multicast_router, &brport_attr_multicast_fast_leave, &brport_attr_multicast_to_unicast, #endif &brport_attr_proxyarp, &brport_attr_proxyarp_wifi, &brport_attr_multicast_flood, 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); }

Contributors

PersonTokensPropCommitsCommitProp
Stephen Hemminger50100.00%1100.00%
Total50100.00%1100.00%


static ssize_t brport_store(struct kobject *kobj, struct attribute *attr, const char *buf, size_t count) { struct brport_attribute *brport_attr = to_brport_attr(attr); struct net_bridge_port *p = to_brport(kobj); ssize_t ret = -EINVAL; char *endp; unsigned long val; if (!ns_capable(dev_net(p->dev)->user_ns, CAP_NET_ADMIN)) return -EPERM; val = simple_strtoul(buf, &endp, 0); if (endp != buf) { if (!rtnl_trylock()) return restart_syscall(); 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) { br_ifinfo_notify(RTM_NEWLINK, p); ret = count; } } rtnl_unlock(); } return ret; }

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PersonTokensPropCommitsCommitProp
Stephen Hemminger15183.89%125.00%
Eric W. Biedermann1910.56%250.00%
Xin Long105.56%125.00%
Total180100.00%4100.00%

const struct sysfs_ops brport_sysfs_ops = { .show = brport_show, .store = brport_store, }; /* * 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) { struct net_bridge *br = p->br; const struct brport_attribute **a; int err; err = sysfs_create_link(&p->kobj, &br->dev->dev.kobj, SYSFS_BRIDGE_PORT_LINK); if (err) return err; for (a = brport_attrs; *a; ++a) { err = sysfs_create_file(&p->kobj, &((*a)->attr)); if (err) return err; } strlcpy(p->sysfs_name, p->dev->name, IFNAMSIZ); return sysfs_create_link(br->ifobj, &p->kobj, p->sysfs_name); }

Contributors

PersonTokensPropCommitsCommitProp
Stephen Hemminger9069.23%250.00%
Simon Arlott3930.00%125.00%
Greg Kroah-Hartman10.77%125.00%
Total130100.00%4100.00%

/* Rename bridge's brif symlink */
int br_sysfs_renameif(struct net_bridge_port *p) { struct net_bridge *br = p->br; int err; /* If a rename fails, the rollback will cause another * rename call with the existing name. */ if (!strncmp(p->sysfs_name, p->dev->name, IFNAMSIZ)) return 0; err = sysfs_rename_link(br->ifobj, &p->kobj, p->sysfs_name, p->dev->name); if (err) netdev_notice(br->dev, "unable to rename link %s to %s", p->sysfs_name, p->dev->name); else strlcpy(p->sysfs_name, p->dev->name, IFNAMSIZ); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Simon Arlott8779.09%150.00%
Stephen Hemminger2320.91%150.00%
Total110100.00%2100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Stephen Hemminger110573.86%724.14%
Simon Arlott1288.56%13.45%
Vlad Yasevich906.02%413.79%
Herbert Xu765.08%13.45%
Eric W. Biedermann191.27%26.90%
Nikolay Aleksandrov120.80%310.34%
Xin Long100.67%13.45%
Jouni Malinen100.67%13.45%
Felix Fietkau100.67%13.45%
Kyeyoon Park100.67%13.45%
Américo Wang80.53%13.45%
Fischer, Anna80.53%13.45%
Ingo Molnar30.20%13.45%
Randy Dunlap30.20%13.45%
David S. Miller20.13%13.45%
Greg Kroah-Hartman10.07%13.45%
Emese Revfy10.07%13.45%
Total1496100.00%29100.00%
Directory: net/bridge
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