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) \ 305a0d513bSstephen hemminger const 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 37cd753732Sstephen hemminger #define BRPORT_ATTR_FLAG(_name, _mask) \ 38cd753732Sstephen hemminger static ssize_t show_##_name(struct net_bridge_port *p, char *buf) \ 39cd753732Sstephen hemminger { \ 40cd753732Sstephen hemminger return sprintf(buf, "%d\n", !!(p->flags & _mask)); \ 41cd753732Sstephen hemminger } \ 42cd753732Sstephen hemminger static int store_##_name(struct net_bridge_port *p, unsigned long v) \ 43cd753732Sstephen hemminger { \ 44cd753732Sstephen hemminger unsigned long flags = p->flags; \ 45cd753732Sstephen hemminger if (v) \ 46cd753732Sstephen hemminger flags |= _mask; \ 47cd753732Sstephen hemminger else \ 48cd753732Sstephen hemminger flags &= ~_mask; \ 49cd753732Sstephen hemminger if (flags != p->flags) { \ 50cd753732Sstephen hemminger p->flags = flags; \ 51cd753732Sstephen hemminger br_ifinfo_notify(RTM_NEWLINK, p); \ 52cd753732Sstephen hemminger } \ 53cd753732Sstephen hemminger return 0; \ 54cd753732Sstephen hemminger } \ 55cd753732Sstephen hemminger static BRPORT_ATTR(_name, S_IRUGO | S_IWUSR, \ 56cd753732Sstephen hemminger show_##_name, store_##_name) 57cd753732Sstephen hemminger 58cd753732Sstephen hemminger 591da177e4SLinus Torvalds static ssize_t show_path_cost(struct net_bridge_port *p, char *buf) 601da177e4SLinus Torvalds { 611da177e4SLinus Torvalds return sprintf(buf, "%d\n", p->path_cost); 621da177e4SLinus Torvalds } 6314f98f25Sstephen hemminger 641da177e4SLinus Torvalds static BRPORT_ATTR(path_cost, S_IRUGO | S_IWUSR, 6514f98f25Sstephen hemminger show_path_cost, br_stp_set_path_cost); 661da177e4SLinus Torvalds 671da177e4SLinus Torvalds static ssize_t show_priority(struct net_bridge_port *p, char *buf) 681da177e4SLinus Torvalds { 691da177e4SLinus Torvalds return sprintf(buf, "%d\n", p->priority); 701da177e4SLinus Torvalds } 7114f98f25Sstephen hemminger 721da177e4SLinus Torvalds static BRPORT_ATTR(priority, S_IRUGO | S_IWUSR, 7314f98f25Sstephen hemminger show_priority, br_stp_set_port_priority); 741da177e4SLinus Torvalds 751da177e4SLinus Torvalds static ssize_t show_designated_root(struct net_bridge_port *p, char *buf) 761da177e4SLinus Torvalds { 771da177e4SLinus Torvalds return br_show_bridge_id(buf, &p->designated_root); 781da177e4SLinus Torvalds } 791da177e4SLinus Torvalds static BRPORT_ATTR(designated_root, S_IRUGO, show_designated_root, NULL); 801da177e4SLinus Torvalds 811da177e4SLinus Torvalds static ssize_t show_designated_bridge(struct net_bridge_port *p, char *buf) 821da177e4SLinus Torvalds { 831da177e4SLinus Torvalds return br_show_bridge_id(buf, &p->designated_bridge); 841da177e4SLinus Torvalds } 851da177e4SLinus Torvalds static BRPORT_ATTR(designated_bridge, S_IRUGO, show_designated_bridge, NULL); 861da177e4SLinus Torvalds 871da177e4SLinus Torvalds static ssize_t show_designated_port(struct net_bridge_port *p, char *buf) 881da177e4SLinus Torvalds { 891da177e4SLinus Torvalds return sprintf(buf, "%d\n", p->designated_port); 901da177e4SLinus Torvalds } 911da177e4SLinus Torvalds static BRPORT_ATTR(designated_port, S_IRUGO, show_designated_port, NULL); 921da177e4SLinus Torvalds 931da177e4SLinus Torvalds static ssize_t show_designated_cost(struct net_bridge_port *p, char *buf) 941da177e4SLinus Torvalds { 951da177e4SLinus Torvalds return sprintf(buf, "%d\n", p->designated_cost); 961da177e4SLinus Torvalds } 971da177e4SLinus Torvalds static BRPORT_ATTR(designated_cost, S_IRUGO, show_designated_cost, NULL); 981da177e4SLinus Torvalds 991da177e4SLinus Torvalds static ssize_t show_port_id(struct net_bridge_port *p, char *buf) 1001da177e4SLinus Torvalds { 1011da177e4SLinus Torvalds return sprintf(buf, "0x%x\n", p->port_id); 1021da177e4SLinus Torvalds } 1031da177e4SLinus Torvalds static BRPORT_ATTR(port_id, S_IRUGO, show_port_id, NULL); 1041da177e4SLinus Torvalds 1051da177e4SLinus Torvalds static ssize_t show_port_no(struct net_bridge_port *p, char *buf) 1061da177e4SLinus Torvalds { 1071da177e4SLinus Torvalds return sprintf(buf, "0x%x\n", p->port_no); 1081da177e4SLinus Torvalds } 1091da177e4SLinus Torvalds 1101da177e4SLinus Torvalds static BRPORT_ATTR(port_no, S_IRUGO, show_port_no, NULL); 1111da177e4SLinus Torvalds 1121da177e4SLinus Torvalds static ssize_t show_change_ack(struct net_bridge_port *p, char *buf) 1131da177e4SLinus Torvalds { 1141da177e4SLinus Torvalds return sprintf(buf, "%d\n", p->topology_change_ack); 1151da177e4SLinus Torvalds } 1161da177e4SLinus Torvalds static BRPORT_ATTR(change_ack, S_IRUGO, show_change_ack, NULL); 1171da177e4SLinus Torvalds 1181da177e4SLinus Torvalds static ssize_t show_config_pending(struct net_bridge_port *p, char *buf) 1191da177e4SLinus Torvalds { 1201da177e4SLinus Torvalds return sprintf(buf, "%d\n", p->config_pending); 1211da177e4SLinus Torvalds } 1221da177e4SLinus Torvalds static BRPORT_ATTR(config_pending, S_IRUGO, show_config_pending, NULL); 1231da177e4SLinus Torvalds 1241da177e4SLinus Torvalds static ssize_t show_port_state(struct net_bridge_port *p, char *buf) 1251da177e4SLinus Torvalds { 1261da177e4SLinus Torvalds return sprintf(buf, "%d\n", p->state); 1271da177e4SLinus Torvalds } 1281da177e4SLinus Torvalds static BRPORT_ATTR(state, S_IRUGO, show_port_state, NULL); 1291da177e4SLinus Torvalds 1301da177e4SLinus Torvalds static ssize_t show_message_age_timer(struct net_bridge_port *p, 1311da177e4SLinus Torvalds char *buf) 1321da177e4SLinus Torvalds { 1331da177e4SLinus Torvalds return sprintf(buf, "%ld\n", br_timer_value(&p->message_age_timer)); 1341da177e4SLinus Torvalds } 1351da177e4SLinus Torvalds static BRPORT_ATTR(message_age_timer, S_IRUGO, show_message_age_timer, NULL); 1361da177e4SLinus Torvalds 1371da177e4SLinus Torvalds static ssize_t show_forward_delay_timer(struct net_bridge_port *p, 1381da177e4SLinus Torvalds char *buf) 1391da177e4SLinus Torvalds { 1401da177e4SLinus Torvalds return sprintf(buf, "%ld\n", br_timer_value(&p->forward_delay_timer)); 1411da177e4SLinus Torvalds } 1421da177e4SLinus Torvalds static BRPORT_ATTR(forward_delay_timer, S_IRUGO, show_forward_delay_timer, NULL); 1431da177e4SLinus Torvalds 1441da177e4SLinus Torvalds static ssize_t show_hold_timer(struct net_bridge_port *p, 1451da177e4SLinus Torvalds char *buf) 1461da177e4SLinus Torvalds { 1471da177e4SLinus Torvalds return sprintf(buf, "%ld\n", br_timer_value(&p->hold_timer)); 1481da177e4SLinus Torvalds } 1491da177e4SLinus Torvalds static BRPORT_ATTR(hold_timer, S_IRUGO, show_hold_timer, NULL); 1501da177e4SLinus Torvalds 15114f98f25Sstephen hemminger static int store_flush(struct net_bridge_port *p, unsigned long v) 1529cf63747SStephen Hemminger { 1539cf63747SStephen Hemminger br_fdb_delete_by_port(p->br, p, 0); // Don't delete local entry 1549cf63747SStephen Hemminger return 0; 1559cf63747SStephen Hemminger } 1569cf63747SStephen Hemminger static BRPORT_ATTR(flush, S_IWUSR, NULL, store_flush); 1579cf63747SStephen Hemminger 158cd753732Sstephen hemminger BRPORT_ATTR_FLAG(hairpin_mode, BR_HAIRPIN_MODE); 159a2e01a65Sstephen hemminger BRPORT_ATTR_FLAG(bpdu_guard, BR_BPDU_GUARD); 1601007dd1aSstephen hemminger BRPORT_ATTR_FLAG(root_block, BR_ROOT_BLOCK); 1619ba18891SVlad Yasevich BRPORT_ATTR_FLAG(learning, BR_LEARNING); 1623982d3d2SFischer, Anna 1630909e117SHerbert Xu #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 1640909e117SHerbert Xu static ssize_t show_multicast_router(struct net_bridge_port *p, char *buf) 1650909e117SHerbert Xu { 1660909e117SHerbert Xu return sprintf(buf, "%d\n", p->multicast_router); 1670909e117SHerbert Xu } 1680909e117SHerbert Xu 16914f98f25Sstephen hemminger static int store_multicast_router(struct net_bridge_port *p, 1700909e117SHerbert Xu unsigned long v) 1710909e117SHerbert Xu { 1720909e117SHerbert Xu return br_multicast_set_port_router(p, v); 1730909e117SHerbert Xu } 1740909e117SHerbert Xu static BRPORT_ATTR(multicast_router, S_IRUGO | S_IWUSR, show_multicast_router, 1750909e117SHerbert Xu store_multicast_router); 17650426b59SAmerigo Wang 177c2d3babfSDavid S. Miller BRPORT_ATTR_FLAG(multicast_fast_leave, BR_MULTICAST_FAST_LEAVE); 1780909e117SHerbert Xu #endif 1790909e117SHerbert Xu 1805a0d513bSstephen hemminger static const struct brport_attribute *brport_attrs[] = { 1811da177e4SLinus Torvalds &brport_attr_path_cost, 1821da177e4SLinus Torvalds &brport_attr_priority, 1831da177e4SLinus Torvalds &brport_attr_port_id, 1841da177e4SLinus Torvalds &brport_attr_port_no, 1851da177e4SLinus Torvalds &brport_attr_designated_root, 1861da177e4SLinus Torvalds &brport_attr_designated_bridge, 1871da177e4SLinus Torvalds &brport_attr_designated_port, 1881da177e4SLinus Torvalds &brport_attr_designated_cost, 1891da177e4SLinus Torvalds &brport_attr_state, 1901da177e4SLinus Torvalds &brport_attr_change_ack, 1911da177e4SLinus Torvalds &brport_attr_config_pending, 1921da177e4SLinus Torvalds &brport_attr_message_age_timer, 1931da177e4SLinus Torvalds &brport_attr_forward_delay_timer, 1941da177e4SLinus Torvalds &brport_attr_hold_timer, 1959cf63747SStephen Hemminger &brport_attr_flush, 1963982d3d2SFischer, Anna &brport_attr_hairpin_mode, 197a2e01a65Sstephen hemminger &brport_attr_bpdu_guard, 1981007dd1aSstephen hemminger &brport_attr_root_block, 1999ba18891SVlad Yasevich &brport_attr_learning, 2000909e117SHerbert Xu #ifdef CONFIG_BRIDGE_IGMP_SNOOPING 2010909e117SHerbert Xu &brport_attr_multicast_router, 20250426b59SAmerigo Wang &brport_attr_multicast_fast_leave, 2030909e117SHerbert Xu #endif 2041da177e4SLinus Torvalds NULL 2051da177e4SLinus Torvalds }; 2061da177e4SLinus Torvalds 2071da177e4SLinus Torvalds #define to_brport_attr(_at) container_of(_at, struct brport_attribute, attr) 2081da177e4SLinus Torvalds #define to_brport(obj) container_of(obj, struct net_bridge_port, kobj) 2091da177e4SLinus Torvalds 2101da177e4SLinus Torvalds static ssize_t brport_show(struct kobject * kobj, 2111da177e4SLinus Torvalds struct attribute * attr, char * buf) 2121da177e4SLinus Torvalds { 2131da177e4SLinus Torvalds struct brport_attribute * brport_attr = to_brport_attr(attr); 2141da177e4SLinus Torvalds struct net_bridge_port * p = to_brport(kobj); 2151da177e4SLinus Torvalds 2161da177e4SLinus Torvalds return brport_attr->show(p, buf); 2171da177e4SLinus Torvalds } 2181da177e4SLinus Torvalds 2191da177e4SLinus Torvalds static ssize_t brport_store(struct kobject * kobj, 2201da177e4SLinus Torvalds struct attribute * attr, 2211da177e4SLinus Torvalds const char * buf, size_t count) 2221da177e4SLinus Torvalds { 2231da177e4SLinus Torvalds struct brport_attribute * brport_attr = to_brport_attr(attr); 2241da177e4SLinus Torvalds struct net_bridge_port * p = to_brport(kobj); 2251da177e4SLinus Torvalds ssize_t ret = -EINVAL; 2261da177e4SLinus Torvalds char *endp; 2271da177e4SLinus Torvalds unsigned long val; 2281da177e4SLinus Torvalds 229cb990503SEric W. Biederman if (!ns_capable(dev_net(p->dev)->user_ns, CAP_NET_ADMIN)) 2301da177e4SLinus Torvalds return -EPERM; 2311da177e4SLinus Torvalds 2321da177e4SLinus Torvalds val = simple_strtoul(buf, &endp, 0); 2331da177e4SLinus Torvalds if (endp != buf) { 234af38f298SEric W. Biederman if (!rtnl_trylock()) 235af38f298SEric W. Biederman return restart_syscall(); 2361da177e4SLinus Torvalds if (p->dev && p->br && brport_attr->store) { 2371da177e4SLinus Torvalds spin_lock_bh(&p->br->lock); 2381da177e4SLinus Torvalds ret = brport_attr->store(p, val); 2391da177e4SLinus Torvalds spin_unlock_bh(&p->br->lock); 2401da177e4SLinus Torvalds if (ret == 0) 2411da177e4SLinus Torvalds ret = count; 2421da177e4SLinus Torvalds } 2431da177e4SLinus Torvalds rtnl_unlock(); 2441da177e4SLinus Torvalds } 2451da177e4SLinus Torvalds return ret; 2461da177e4SLinus Torvalds } 2471da177e4SLinus Torvalds 24852cf25d0SEmese Revfy const struct sysfs_ops brport_sysfs_ops = { 2491da177e4SLinus Torvalds .show = brport_show, 2501da177e4SLinus Torvalds .store = brport_store, 2511da177e4SLinus Torvalds }; 2521da177e4SLinus Torvalds 2531da177e4SLinus Torvalds /* 2541da177e4SLinus Torvalds * Add sysfs entries to ethernet device added to a bridge. 2551da177e4SLinus Torvalds * Creates a brport subdirectory with bridge attributes. 256e0f43752SSimon Arlott * Puts symlink in bridge's brif subdirectory 2571da177e4SLinus Torvalds */ 2581da177e4SLinus Torvalds int br_sysfs_addif(struct net_bridge_port *p) 2591da177e4SLinus Torvalds { 2601da177e4SLinus Torvalds struct net_bridge *br = p->br; 2615a0d513bSstephen hemminger const struct brport_attribute **a; 2621da177e4SLinus Torvalds int err; 2631da177e4SLinus Torvalds 26443cb76d9SGreg Kroah-Hartman err = sysfs_create_link(&p->kobj, &br->dev->dev.kobj, 2651da177e4SLinus Torvalds SYSFS_BRIDGE_PORT_LINK); 2661da177e4SLinus Torvalds if (err) 267e0f43752SSimon Arlott return err; 2681da177e4SLinus Torvalds 2691da177e4SLinus Torvalds for (a = brport_attrs; *a; ++a) { 2701da177e4SLinus Torvalds err = sysfs_create_file(&p->kobj, &((*a)->attr)); 2711da177e4SLinus Torvalds if (err) 272e0f43752SSimon Arlott return err; 2731da177e4SLinus Torvalds } 2741da177e4SLinus Torvalds 275e0f43752SSimon Arlott strlcpy(p->sysfs_name, p->dev->name, IFNAMSIZ); 276e0f43752SSimon Arlott return sysfs_create_link(br->ifobj, &p->kobj, p->sysfs_name); 277e0f43752SSimon Arlott } 278e0f43752SSimon Arlott 279e0f43752SSimon Arlott /* Rename bridge's brif symlink */ 280e0f43752SSimon Arlott int br_sysfs_renameif(struct net_bridge_port *p) 281e0f43752SSimon Arlott { 282e0f43752SSimon Arlott struct net_bridge *br = p->br; 283e0f43752SSimon Arlott int err; 284e0f43752SSimon Arlott 285e0f43752SSimon Arlott /* If a rename fails, the rollback will cause another 286e0f43752SSimon Arlott * rename call with the existing name. 287e0f43752SSimon Arlott */ 288e0f43752SSimon Arlott if (!strncmp(p->sysfs_name, p->dev->name, IFNAMSIZ)) 289e0f43752SSimon Arlott return 0; 290e0f43752SSimon Arlott 291e0f43752SSimon Arlott err = sysfs_rename_link(br->ifobj, &p->kobj, 292e0f43752SSimon Arlott p->sysfs_name, p->dev->name); 293e0f43752SSimon Arlott if (err) 294e0f43752SSimon Arlott netdev_notice(br->dev, "unable to rename link %s to %s", 295e0f43752SSimon Arlott p->sysfs_name, p->dev->name); 296e0f43752SSimon Arlott else 297e0f43752SSimon Arlott strlcpy(p->sysfs_name, p->dev->name, IFNAMSIZ); 298e0f43752SSimon Arlott 2991da177e4SLinus Torvalds return err; 3001da177e4SLinus Torvalds } 301