11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * Sysfs attributes of bridge ports 31da177e4SLinus Torvalds * Linux ethernet bridge 41da177e4SLinus Torvalds * 51da177e4SLinus Torvalds * Authors: 61da177e4SLinus Torvalds * Stephen Hemminger <shemminger@osdl.org> 71da177e4SLinus Torvalds * 81da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or 91da177e4SLinus Torvalds * modify it under the terms of the GNU General Public License 101da177e4SLinus Torvalds * as published by the Free Software Foundation; either version 111da177e4SLinus Torvalds * 2 of the License, or (at your option) any later version. 121da177e4SLinus Torvalds */ 131da177e4SLinus Torvalds 144fc268d2SRandy Dunlap #include <linux/capability.h> 151da177e4SLinus Torvalds #include <linux/kernel.h> 161da177e4SLinus Torvalds #include <linux/netdevice.h> 171da177e4SLinus Torvalds #include <linux/if_bridge.h> 181da177e4SLinus Torvalds #include <linux/rtnetlink.h> 191da177e4SLinus Torvalds #include <linux/spinlock.h> 201da177e4SLinus Torvalds 211da177e4SLinus Torvalds #include "br_private.h" 221da177e4SLinus Torvalds 231da177e4SLinus Torvalds struct brport_attribute { 241da177e4SLinus Torvalds struct attribute attr; 251da177e4SLinus Torvalds ssize_t (*show)(struct net_bridge_port *, char *); 2614f98f25Sstephen hemminger int (*store)(struct net_bridge_port *, unsigned long); 271da177e4SLinus Torvalds }; 281da177e4SLinus Torvalds 291da177e4SLinus Torvalds #define BRPORT_ATTR(_name,_mode,_show,_store) \ 301da177e4SLinus Torvalds struct brport_attribute brport_attr_##_name = { \ 311da177e4SLinus Torvalds .attr = {.name = __stringify(_name), \ 327b595756STejun Heo .mode = _mode }, \ 331da177e4SLinus Torvalds .show = _show, \ 341da177e4SLinus Torvalds .store = _store, \ 351da177e4SLinus Torvalds }; 361da177e4SLinus Torvalds 371da177e4SLinus Torvalds static ssize_t show_path_cost(struct net_bridge_port *p, char *buf) 381da177e4SLinus Torvalds { 391da177e4SLinus Torvalds return sprintf(buf, "%d\n", p->path_cost); 401da177e4SLinus Torvalds } 4114f98f25Sstephen hemminger 421da177e4SLinus Torvalds static BRPORT_ATTR(path_cost, S_IRUGO | S_IWUSR, 4314f98f25Sstephen hemminger show_path_cost, br_stp_set_path_cost); 441da177e4SLinus Torvalds 451da177e4SLinus Torvalds static ssize_t show_priority(struct net_bridge_port *p, char *buf) 461da177e4SLinus Torvalds { 471da177e4SLinus Torvalds return sprintf(buf, "%d\n", p->priority); 481da177e4SLinus Torvalds } 4914f98f25Sstephen hemminger 501da177e4SLinus Torvalds static BRPORT_ATTR(priority, S_IRUGO | S_IWUSR, 5114f98f25Sstephen hemminger show_priority, br_stp_set_port_priority); 521da177e4SLinus Torvalds 531da177e4SLinus Torvalds static ssize_t show_designated_root(struct net_bridge_port *p, char *buf) 541da177e4SLinus Torvalds { 551da177e4SLinus Torvalds return br_show_bridge_id(buf, &p->designated_root); 561da177e4SLinus Torvalds } 571da177e4SLinus Torvalds static BRPORT_ATTR(designated_root, S_IRUGO, show_designated_root, NULL); 581da177e4SLinus Torvalds 591da177e4SLinus Torvalds static ssize_t show_designated_bridge(struct net_bridge_port *p, char *buf) 601da177e4SLinus Torvalds { 611da177e4SLinus Torvalds return br_show_bridge_id(buf, &p->designated_bridge); 621da177e4SLinus Torvalds } 631da177e4SLinus Torvalds static BRPORT_ATTR(designated_bridge, S_IRUGO, show_designated_bridge, NULL); 641da177e4SLinus Torvalds 651da177e4SLinus Torvalds static ssize_t show_designated_port(struct net_bridge_port *p, char *buf) 661da177e4SLinus Torvalds { 671da177e4SLinus Torvalds return sprintf(buf, "%d\n", p->designated_port); 681da177e4SLinus Torvalds } 691da177e4SLinus Torvalds static BRPORT_ATTR(designated_port, S_IRUGO, show_designated_port, NULL); 701da177e4SLinus Torvalds 711da177e4SLinus Torvalds static ssize_t show_designated_cost(struct net_bridge_port *p, char *buf) 721da177e4SLinus Torvalds { 731da177e4SLinus Torvalds return sprintf(buf, "%d\n", p->designated_cost); 741da177e4SLinus Torvalds } 751da177e4SLinus Torvalds static BRPORT_ATTR(designated_cost, S_IRUGO, show_designated_cost, NULL); 761da177e4SLinus Torvalds 771da177e4SLinus Torvalds static ssize_t show_port_id(struct net_bridge_port *p, char *buf) 781da177e4SLinus Torvalds { 791da177e4SLinus Torvalds return sprintf(buf, "0x%x\n", p->port_id); 801da177e4SLinus Torvalds } 811da177e4SLinus Torvalds static BRPORT_ATTR(port_id, S_IRUGO, show_port_id, NULL); 821da177e4SLinus Torvalds 831da177e4SLinus Torvalds static ssize_t show_port_no(struct net_bridge_port *p, char *buf) 841da177e4SLinus Torvalds { 851da177e4SLinus Torvalds return sprintf(buf, "0x%x\n", p->port_no); 861da177e4SLinus Torvalds } 871da177e4SLinus Torvalds 881da177e4SLinus Torvalds static BRPORT_ATTR(port_no, S_IRUGO, show_port_no, NULL); 891da177e4SLinus Torvalds 901da177e4SLinus Torvalds static ssize_t show_change_ack(struct net_bridge_port *p, char *buf) 911da177e4SLinus Torvalds { 921da177e4SLinus Torvalds return sprintf(buf, "%d\n", p->topology_change_ack); 931da177e4SLinus Torvalds } 941da177e4SLinus Torvalds static BRPORT_ATTR(change_ack, S_IRUGO, show_change_ack, NULL); 951da177e4SLinus Torvalds 961da177e4SLinus Torvalds static ssize_t show_config_pending(struct net_bridge_port *p, char *buf) 971da177e4SLinus Torvalds { 981da177e4SLinus Torvalds return sprintf(buf, "%d\n", p->config_pending); 991da177e4SLinus Torvalds } 1001da177e4SLinus Torvalds static BRPORT_ATTR(config_pending, S_IRUGO, show_config_pending, NULL); 1011da177e4SLinus Torvalds 1021da177e4SLinus Torvalds static ssize_t show_port_state(struct net_bridge_port *p, char *buf) 1031da177e4SLinus Torvalds { 1041da177e4SLinus Torvalds return sprintf(buf, "%d\n", p->state); 1051da177e4SLinus Torvalds } 1061da177e4SLinus Torvalds static BRPORT_ATTR(state, S_IRUGO, show_port_state, NULL); 1071da177e4SLinus Torvalds 1081da177e4SLinus Torvalds static ssize_t show_message_age_timer(struct net_bridge_port *p, 1091da177e4SLinus Torvalds char *buf) 1101da177e4SLinus Torvalds { 1111da177e4SLinus Torvalds return sprintf(buf, "%ld\n", br_timer_value(&p->message_age_timer)); 1121da177e4SLinus Torvalds } 1131da177e4SLinus Torvalds static BRPORT_ATTR(message_age_timer, S_IRUGO, show_message_age_timer, NULL); 1141da177e4SLinus Torvalds 1151da177e4SLinus Torvalds static ssize_t show_forward_delay_timer(struct net_bridge_port *p, 1161da177e4SLinus Torvalds char *buf) 1171da177e4SLinus Torvalds { 1181da177e4SLinus Torvalds return sprintf(buf, "%ld\n", br_timer_value(&p->forward_delay_timer)); 1191da177e4SLinus Torvalds } 1201da177e4SLinus Torvalds static BRPORT_ATTR(forward_delay_timer, S_IRUGO, show_forward_delay_timer, NULL); 1211da177e4SLinus Torvalds 1221da177e4SLinus Torvalds static ssize_t show_hold_timer(struct net_bridge_port *p, 1231da177e4SLinus Torvalds char *buf) 1241da177e4SLinus Torvalds { 1251da177e4SLinus Torvalds return sprintf(buf, "%ld\n", br_timer_value(&p->hold_timer)); 1261da177e4SLinus Torvalds } 1271da177e4SLinus Torvalds static BRPORT_ATTR(hold_timer, S_IRUGO, show_hold_timer, NULL); 1281da177e4SLinus Torvalds 12914f98f25Sstephen hemminger static int store_flush(struct net_bridge_port *p, unsigned long v) 1309cf63747SStephen Hemminger { 1319cf63747SStephen Hemminger br_fdb_delete_by_port(p->br, p, 0); // Don't delete local entry 1329cf63747SStephen Hemminger return 0; 1339cf63747SStephen Hemminger } 1349cf63747SStephen Hemminger static BRPORT_ATTR(flush, S_IWUSR, NULL, store_flush); 1359cf63747SStephen Hemminger 1363982d3d2SFischer, Anna static ssize_t show_hairpin_mode(struct net_bridge_port *p, char *buf) 1373982d3d2SFischer, Anna { 1383982d3d2SFischer, Anna int hairpin_mode = (p->flags & BR_HAIRPIN_MODE) ? 1 : 0; 1393982d3d2SFischer, Anna return sprintf(buf, "%d\n", hairpin_mode); 1403982d3d2SFischer, Anna } 14114f98f25Sstephen hemminger static int store_hairpin_mode(struct net_bridge_port *p, unsigned long v) 1423982d3d2SFischer, Anna { 1433982d3d2SFischer, Anna if (v) 1443982d3d2SFischer, Anna p->flags |= BR_HAIRPIN_MODE; 1453982d3d2SFischer, Anna else 1463982d3d2SFischer, Anna p->flags &= ~BR_HAIRPIN_MODE; 1473982d3d2SFischer, Anna return 0; 1483982d3d2SFischer, Anna } 1493982d3d2SFischer, Anna static BRPORT_ATTR(hairpin_mode, S_IRUGO | S_IWUSR, 1503982d3d2SFischer, Anna show_hairpin_mode, store_hairpin_mode); 1513982d3d2SFischer, Anna 1520909e117SHerbert Xu #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 1530909e117SHerbert Xu static ssize_t show_multicast_router(struct net_bridge_port *p, char *buf) 1540909e117SHerbert Xu { 1550909e117SHerbert Xu return sprintf(buf, "%d\n", p->multicast_router); 1560909e117SHerbert Xu } 1570909e117SHerbert Xu 15814f98f25Sstephen hemminger static int store_multicast_router(struct net_bridge_port *p, 1590909e117SHerbert Xu unsigned long v) 1600909e117SHerbert Xu { 1610909e117SHerbert Xu return br_multicast_set_port_router(p, v); 1620909e117SHerbert Xu } 1630909e117SHerbert Xu static BRPORT_ATTR(multicast_router, S_IRUGO | S_IWUSR, show_multicast_router, 1640909e117SHerbert Xu store_multicast_router); 1650909e117SHerbert Xu #endif 1660909e117SHerbert Xu 1671da177e4SLinus Torvalds static struct brport_attribute *brport_attrs[] = { 1681da177e4SLinus Torvalds &brport_attr_path_cost, 1691da177e4SLinus Torvalds &brport_attr_priority, 1701da177e4SLinus Torvalds &brport_attr_port_id, 1711da177e4SLinus Torvalds &brport_attr_port_no, 1721da177e4SLinus Torvalds &brport_attr_designated_root, 1731da177e4SLinus Torvalds &brport_attr_designated_bridge, 1741da177e4SLinus Torvalds &brport_attr_designated_port, 1751da177e4SLinus Torvalds &brport_attr_designated_cost, 1761da177e4SLinus Torvalds &brport_attr_state, 1771da177e4SLinus Torvalds &brport_attr_change_ack, 1781da177e4SLinus Torvalds &brport_attr_config_pending, 1791da177e4SLinus Torvalds &brport_attr_message_age_timer, 1801da177e4SLinus Torvalds &brport_attr_forward_delay_timer, 1811da177e4SLinus Torvalds &brport_attr_hold_timer, 1829cf63747SStephen Hemminger &brport_attr_flush, 1833982d3d2SFischer, Anna &brport_attr_hairpin_mode, 1840909e117SHerbert Xu #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 1850909e117SHerbert Xu &brport_attr_multicast_router, 1860909e117SHerbert Xu #endif 1871da177e4SLinus Torvalds NULL 1881da177e4SLinus Torvalds }; 1891da177e4SLinus Torvalds 1901da177e4SLinus Torvalds #define to_brport_attr(_at) container_of(_at, struct brport_attribute, attr) 1911da177e4SLinus Torvalds #define to_brport(obj) container_of(obj, struct net_bridge_port, kobj) 1921da177e4SLinus Torvalds 1931da177e4SLinus Torvalds static ssize_t brport_show(struct kobject * kobj, 1941da177e4SLinus Torvalds struct attribute * attr, char * buf) 1951da177e4SLinus Torvalds { 1961da177e4SLinus Torvalds struct brport_attribute * brport_attr = to_brport_attr(attr); 1971da177e4SLinus Torvalds struct net_bridge_port * p = to_brport(kobj); 1981da177e4SLinus Torvalds 1991da177e4SLinus Torvalds return brport_attr->show(p, buf); 2001da177e4SLinus Torvalds } 2011da177e4SLinus Torvalds 2021da177e4SLinus Torvalds static ssize_t brport_store(struct kobject * kobj, 2031da177e4SLinus Torvalds struct attribute * attr, 2041da177e4SLinus Torvalds const char * buf, size_t count) 2051da177e4SLinus Torvalds { 2061da177e4SLinus Torvalds struct brport_attribute * brport_attr = to_brport_attr(attr); 2071da177e4SLinus Torvalds struct net_bridge_port * p = to_brport(kobj); 2081da177e4SLinus Torvalds ssize_t ret = -EINVAL; 2091da177e4SLinus Torvalds char *endp; 2101da177e4SLinus Torvalds unsigned long val; 2111da177e4SLinus Torvalds 2121da177e4SLinus Torvalds if (!capable(CAP_NET_ADMIN)) 2131da177e4SLinus Torvalds return -EPERM; 2141da177e4SLinus Torvalds 2151da177e4SLinus Torvalds val = simple_strtoul(buf, &endp, 0); 2161da177e4SLinus Torvalds if (endp != buf) { 217af38f298SEric W. Biederman if (!rtnl_trylock()) 218af38f298SEric W. Biederman return restart_syscall(); 2191da177e4SLinus Torvalds if (p->dev && p->br && brport_attr->store) { 2201da177e4SLinus Torvalds spin_lock_bh(&p->br->lock); 2211da177e4SLinus Torvalds ret = brport_attr->store(p, val); 2221da177e4SLinus Torvalds spin_unlock_bh(&p->br->lock); 2231da177e4SLinus Torvalds if (ret == 0) 2241da177e4SLinus Torvalds ret = count; 2251da177e4SLinus Torvalds } 2261da177e4SLinus Torvalds rtnl_unlock(); 2271da177e4SLinus Torvalds } 2281da177e4SLinus Torvalds return ret; 2291da177e4SLinus Torvalds } 2301da177e4SLinus Torvalds 23152cf25d0SEmese Revfy const struct sysfs_ops brport_sysfs_ops = { 2321da177e4SLinus Torvalds .show = brport_show, 2331da177e4SLinus Torvalds .store = brport_store, 2341da177e4SLinus Torvalds }; 2351da177e4SLinus Torvalds 2361da177e4SLinus Torvalds /* 2371da177e4SLinus Torvalds * Add sysfs entries to ethernet device added to a bridge. 2381da177e4SLinus Torvalds * Creates a brport subdirectory with bridge attributes. 239e0f43752SSimon Arlott * Puts symlink in bridge's brif subdirectory 2401da177e4SLinus Torvalds */ 2411da177e4SLinus Torvalds int br_sysfs_addif(struct net_bridge_port *p) 2421da177e4SLinus Torvalds { 2431da177e4SLinus Torvalds struct net_bridge *br = p->br; 2441da177e4SLinus Torvalds struct brport_attribute **a; 2451da177e4SLinus Torvalds int err; 2461da177e4SLinus Torvalds 24743cb76d9SGreg Kroah-Hartman err = sysfs_create_link(&p->kobj, &br->dev->dev.kobj, 2481da177e4SLinus Torvalds SYSFS_BRIDGE_PORT_LINK); 2491da177e4SLinus Torvalds if (err) 250e0f43752SSimon Arlott return err; 2511da177e4SLinus Torvalds 2521da177e4SLinus Torvalds for (a = brport_attrs; *a; ++a) { 2531da177e4SLinus Torvalds err = sysfs_create_file(&p->kobj, &((*a)->attr)); 2541da177e4SLinus Torvalds if (err) 255e0f43752SSimon Arlott return err; 2561da177e4SLinus Torvalds } 2571da177e4SLinus Torvalds 258e0f43752SSimon Arlott strlcpy(p->sysfs_name, p->dev->name, IFNAMSIZ); 259e0f43752SSimon Arlott return sysfs_create_link(br->ifobj, &p->kobj, p->sysfs_name); 260e0f43752SSimon Arlott } 261e0f43752SSimon Arlott 262e0f43752SSimon Arlott /* Rename bridge's brif symlink */ 263e0f43752SSimon Arlott int br_sysfs_renameif(struct net_bridge_port *p) 264e0f43752SSimon Arlott { 265e0f43752SSimon Arlott struct net_bridge *br = p->br; 266e0f43752SSimon Arlott int err; 267e0f43752SSimon Arlott 268e0f43752SSimon Arlott /* If a rename fails, the rollback will cause another 269e0f43752SSimon Arlott * rename call with the existing name. 270e0f43752SSimon Arlott */ 271e0f43752SSimon Arlott if (!strncmp(p->sysfs_name, p->dev->name, IFNAMSIZ)) 272e0f43752SSimon Arlott return 0; 273e0f43752SSimon Arlott 274e0f43752SSimon Arlott err = sysfs_rename_link(br->ifobj, &p->kobj, 275e0f43752SSimon Arlott p->sysfs_name, p->dev->name); 276e0f43752SSimon Arlott if (err) 277e0f43752SSimon Arlott netdev_notice(br->dev, "unable to rename link %s to %s", 278e0f43752SSimon Arlott p->sysfs_name, p->dev->name); 279e0f43752SSimon Arlott else 280e0f43752SSimon Arlott strlcpy(p->sysfs_name, p->dev->name, IFNAMSIZ); 281e0f43752SSimon Arlott 2821da177e4SLinus Torvalds return err; 2831da177e4SLinus Torvalds } 284