11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * Ioctl handler 31da177e4SLinus Torvalds * Linux ethernet bridge 41da177e4SLinus Torvalds * 51da177e4SLinus Torvalds * Authors: 61da177e4SLinus Torvalds * Lennert Buytenhek <buytenh@gnu.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/if_bridge.h> 171da177e4SLinus Torvalds #include <linux/netdevice.h> 181da177e4SLinus Torvalds #include <linux/times.h> 19881d966bSEric W. Biederman #include <net/net_namespace.h> 201da177e4SLinus Torvalds #include <asm/uaccess.h> 211da177e4SLinus Torvalds #include "br_private.h" 221da177e4SLinus Torvalds 231da177e4SLinus Torvalds /* called with RTNL */ 244aa678baSAlexey Dobriyan static int get_bridge_ifindices(struct net *net, int *indices, int num) 251da177e4SLinus Torvalds { 261da177e4SLinus Torvalds struct net_device *dev; 271da177e4SLinus Torvalds int i = 0; 281da177e4SLinus Torvalds 294aa678baSAlexey Dobriyan for_each_netdev(net, dev) { 307562f876SPavel Emelianov if (i >= num) 317562f876SPavel Emelianov break; 321da177e4SLinus Torvalds if (dev->priv_flags & IFF_EBRIDGE) 331da177e4SLinus Torvalds indices[i++] = dev->ifindex; 341da177e4SLinus Torvalds } 351da177e4SLinus Torvalds 361da177e4SLinus Torvalds return i; 371da177e4SLinus Torvalds } 381da177e4SLinus Torvalds 391da177e4SLinus Torvalds /* called with RTNL */ 401da177e4SLinus Torvalds static void get_port_ifindices(struct net_bridge *br, int *ifindices, int num) 411da177e4SLinus Torvalds { 421da177e4SLinus Torvalds struct net_bridge_port *p; 431da177e4SLinus Torvalds 441da177e4SLinus Torvalds list_for_each_entry(p, &br->port_list, list) { 451da177e4SLinus Torvalds if (p->port_no < num) 461da177e4SLinus Torvalds ifindices[p->port_no] = p->dev->ifindex; 471da177e4SLinus Torvalds } 481da177e4SLinus Torvalds } 491da177e4SLinus Torvalds 501da177e4SLinus Torvalds /* 511da177e4SLinus Torvalds * Format up to a page worth of forwarding table entries 521da177e4SLinus Torvalds * userbuf -- where to copy result 531da177e4SLinus Torvalds * maxnum -- maximum number of entries desired 541da177e4SLinus Torvalds * (limited to a page for sanity) 551da177e4SLinus Torvalds * offset -- number of records to skip 561da177e4SLinus Torvalds */ 571da177e4SLinus Torvalds static int get_fdb_entries(struct net_bridge *br, void __user *userbuf, 581da177e4SLinus Torvalds unsigned long maxnum, unsigned long offset) 591da177e4SLinus Torvalds { 601da177e4SLinus Torvalds int num; 611da177e4SLinus Torvalds void *buf; 62ba8379b2SChris Wright size_t size; 631da177e4SLinus Torvalds 64ba8379b2SChris Wright /* Clamp size to PAGE_SIZE, test maxnum to avoid overflow */ 65ba8379b2SChris Wright if (maxnum > PAGE_SIZE/sizeof(struct __fdb_entry)) 661da177e4SLinus Torvalds maxnum = PAGE_SIZE/sizeof(struct __fdb_entry); 67ba8379b2SChris Wright 68ba8379b2SChris Wright size = maxnum * sizeof(struct __fdb_entry); 691da177e4SLinus Torvalds 701da177e4SLinus Torvalds buf = kmalloc(size, GFP_USER); 711da177e4SLinus Torvalds if (!buf) 721da177e4SLinus Torvalds return -ENOMEM; 731da177e4SLinus Torvalds 741da177e4SLinus Torvalds num = br_fdb_fillbuf(br, buf, maxnum, offset); 751da177e4SLinus Torvalds if (num > 0) { 761da177e4SLinus Torvalds if (copy_to_user(userbuf, buf, num*sizeof(struct __fdb_entry))) 771da177e4SLinus Torvalds num = -EFAULT; 781da177e4SLinus Torvalds } 791da177e4SLinus Torvalds kfree(buf); 801da177e4SLinus Torvalds 811da177e4SLinus Torvalds return num; 821da177e4SLinus Torvalds } 831da177e4SLinus Torvalds 8431ef30c7SEric Dumazet /* called with RTNL */ 851da177e4SLinus Torvalds static int add_del_if(struct net_bridge *br, int ifindex, int isadd) 861da177e4SLinus Torvalds { 871da177e4SLinus Torvalds struct net_device *dev; 881da177e4SLinus Torvalds int ret; 891da177e4SLinus Torvalds 901da177e4SLinus Torvalds if (!capable(CAP_NET_ADMIN)) 911da177e4SLinus Torvalds return -EPERM; 921da177e4SLinus Torvalds 9331ef30c7SEric Dumazet dev = __dev_get_by_index(dev_net(br->dev), ifindex); 941da177e4SLinus Torvalds if (dev == NULL) 951da177e4SLinus Torvalds return -EINVAL; 961da177e4SLinus Torvalds 971da177e4SLinus Torvalds if (isadd) 981da177e4SLinus Torvalds ret = br_add_if(br, dev); 991da177e4SLinus Torvalds else 1001da177e4SLinus Torvalds ret = br_del_if(br, dev); 1011da177e4SLinus Torvalds 1021da177e4SLinus Torvalds return ret; 1031da177e4SLinus Torvalds } 1041da177e4SLinus Torvalds 1051da177e4SLinus Torvalds /* 1061da177e4SLinus Torvalds * Legacy ioctl's through SIOCDEVPRIVATE 1071da177e4SLinus Torvalds * This interface is deprecated because it was too difficult to 1081da177e4SLinus Torvalds * to do the translation for 32/64bit ioctl compatability. 1091da177e4SLinus Torvalds */ 1101da177e4SLinus Torvalds static int old_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) 1111da177e4SLinus Torvalds { 1121da177e4SLinus Torvalds struct net_bridge *br = netdev_priv(dev); 1131da177e4SLinus Torvalds unsigned long args[4]; 1141da177e4SLinus Torvalds 1151da177e4SLinus Torvalds if (copy_from_user(args, rq->ifr_data, sizeof(args))) 1161da177e4SLinus Torvalds return -EFAULT; 1171da177e4SLinus Torvalds 1181da177e4SLinus Torvalds switch (args[0]) { 1191da177e4SLinus Torvalds case BRCTL_ADD_IF: 1201da177e4SLinus Torvalds case BRCTL_DEL_IF: 1211da177e4SLinus Torvalds return add_del_if(br, args[1], args[0] == BRCTL_ADD_IF); 1221da177e4SLinus Torvalds 1231da177e4SLinus Torvalds case BRCTL_GET_BRIDGE_INFO: 1241da177e4SLinus Torvalds { 1251da177e4SLinus Torvalds struct __bridge_info b; 1261da177e4SLinus Torvalds 1271da177e4SLinus Torvalds memset(&b, 0, sizeof(struct __bridge_info)); 1281da177e4SLinus Torvalds rcu_read_lock(); 1291da177e4SLinus Torvalds memcpy(&b.designated_root, &br->designated_root, 8); 1301da177e4SLinus Torvalds memcpy(&b.bridge_id, &br->bridge_id, 8); 1311da177e4SLinus Torvalds b.root_path_cost = br->root_path_cost; 1321da177e4SLinus Torvalds b.max_age = jiffies_to_clock_t(br->max_age); 1331da177e4SLinus Torvalds b.hello_time = jiffies_to_clock_t(br->hello_time); 1341da177e4SLinus Torvalds b.forward_delay = br->forward_delay; 1351da177e4SLinus Torvalds b.bridge_max_age = br->bridge_max_age; 1361da177e4SLinus Torvalds b.bridge_hello_time = br->bridge_hello_time; 1371da177e4SLinus Torvalds b.bridge_forward_delay = jiffies_to_clock_t(br->bridge_forward_delay); 1381da177e4SLinus Torvalds b.topology_change = br->topology_change; 1391da177e4SLinus Torvalds b.topology_change_detected = br->topology_change_detected; 1401da177e4SLinus Torvalds b.root_port = br->root_port; 1419cde0708SStephen Hemminger 1429cde0708SStephen Hemminger b.stp_enabled = (br->stp_enabled != BR_NO_STP); 1431da177e4SLinus Torvalds b.ageing_time = jiffies_to_clock_t(br->ageing_time); 1441da177e4SLinus Torvalds b.hello_timer_value = br_timer_value(&br->hello_timer); 1451da177e4SLinus Torvalds b.tcn_timer_value = br_timer_value(&br->tcn_timer); 1461da177e4SLinus Torvalds b.topology_change_timer_value = br_timer_value(&br->topology_change_timer); 1471da177e4SLinus Torvalds b.gc_timer_value = br_timer_value(&br->gc_timer); 1481da177e4SLinus Torvalds rcu_read_unlock(); 1491da177e4SLinus Torvalds 1501da177e4SLinus Torvalds if (copy_to_user((void __user *)args[1], &b, sizeof(b))) 1511da177e4SLinus Torvalds return -EFAULT; 1521da177e4SLinus Torvalds 1531da177e4SLinus Torvalds return 0; 1541da177e4SLinus Torvalds } 1551da177e4SLinus Torvalds 1561da177e4SLinus Torvalds case BRCTL_GET_PORT_LIST: 1571da177e4SLinus Torvalds { 1581da177e4SLinus Torvalds int num, *indices; 1591da177e4SLinus Torvalds 1601da177e4SLinus Torvalds num = args[2]; 1611da177e4SLinus Torvalds if (num < 0) 1621da177e4SLinus Torvalds return -EINVAL; 1631da177e4SLinus Torvalds if (num == 0) 1641da177e4SLinus Torvalds num = 256; 1651da177e4SLinus Torvalds if (num > BR_MAX_PORTS) 1661da177e4SLinus Torvalds num = BR_MAX_PORTS; 1671da177e4SLinus Torvalds 1680da974f4SPanagiotis Issaris indices = kcalloc(num, sizeof(int), GFP_KERNEL); 1691da177e4SLinus Torvalds if (indices == NULL) 1701da177e4SLinus Torvalds return -ENOMEM; 1711da177e4SLinus Torvalds 1721da177e4SLinus Torvalds get_port_ifindices(br, indices, num); 1731da177e4SLinus Torvalds if (copy_to_user((void __user *)args[1], indices, num*sizeof(int))) 1741da177e4SLinus Torvalds num = -EFAULT; 1751da177e4SLinus Torvalds kfree(indices); 1761da177e4SLinus Torvalds return num; 1771da177e4SLinus Torvalds } 1781da177e4SLinus Torvalds 1791da177e4SLinus Torvalds case BRCTL_SET_BRIDGE_FORWARD_DELAY: 1801da177e4SLinus Torvalds if (!capable(CAP_NET_ADMIN)) 1811da177e4SLinus Torvalds return -EPERM; 1821da177e4SLinus Torvalds 1831da177e4SLinus Torvalds spin_lock_bh(&br->lock); 1841da177e4SLinus Torvalds br->bridge_forward_delay = clock_t_to_jiffies(args[1]); 1851da177e4SLinus Torvalds if (br_is_root_bridge(br)) 1861da177e4SLinus Torvalds br->forward_delay = br->bridge_forward_delay; 1871da177e4SLinus Torvalds spin_unlock_bh(&br->lock); 1881da177e4SLinus Torvalds return 0; 1891da177e4SLinus Torvalds 1901da177e4SLinus Torvalds case BRCTL_SET_BRIDGE_HELLO_TIME: 1918d4698f7SStephen Hemminger { 1928d4698f7SStephen Hemminger unsigned long t = clock_t_to_jiffies(args[1]); 1931da177e4SLinus Torvalds if (!capable(CAP_NET_ADMIN)) 1941da177e4SLinus Torvalds return -EPERM; 1951da177e4SLinus Torvalds 1968d4698f7SStephen Hemminger if (t < HZ) 1978d4698f7SStephen Hemminger return -EINVAL; 1988d4698f7SStephen Hemminger 1991da177e4SLinus Torvalds spin_lock_bh(&br->lock); 2008d4698f7SStephen Hemminger br->bridge_hello_time = t; 2011da177e4SLinus Torvalds if (br_is_root_bridge(br)) 2021da177e4SLinus Torvalds br->hello_time = br->bridge_hello_time; 2031da177e4SLinus Torvalds spin_unlock_bh(&br->lock); 2041da177e4SLinus Torvalds return 0; 2058d4698f7SStephen Hemminger } 2061da177e4SLinus Torvalds 2071da177e4SLinus Torvalds case BRCTL_SET_BRIDGE_MAX_AGE: 2081da177e4SLinus Torvalds if (!capable(CAP_NET_ADMIN)) 2091da177e4SLinus Torvalds return -EPERM; 2101da177e4SLinus Torvalds 2111da177e4SLinus Torvalds spin_lock_bh(&br->lock); 2121da177e4SLinus Torvalds br->bridge_max_age = clock_t_to_jiffies(args[1]); 2131da177e4SLinus Torvalds if (br_is_root_bridge(br)) 2141da177e4SLinus Torvalds br->max_age = br->bridge_max_age; 2151da177e4SLinus Torvalds spin_unlock_bh(&br->lock); 2161da177e4SLinus Torvalds return 0; 2171da177e4SLinus Torvalds 2181da177e4SLinus Torvalds case BRCTL_SET_AGEING_TIME: 2191da177e4SLinus Torvalds if (!capable(CAP_NET_ADMIN)) 2201da177e4SLinus Torvalds return -EPERM; 2211da177e4SLinus Torvalds 2221da177e4SLinus Torvalds br->ageing_time = clock_t_to_jiffies(args[1]); 2231da177e4SLinus Torvalds return 0; 2241da177e4SLinus Torvalds 2251da177e4SLinus Torvalds case BRCTL_GET_PORT_INFO: 2261da177e4SLinus Torvalds { 2271da177e4SLinus Torvalds struct __port_info p; 2281da177e4SLinus Torvalds struct net_bridge_port *pt; 2291da177e4SLinus Torvalds 2301da177e4SLinus Torvalds rcu_read_lock(); 2311da177e4SLinus Torvalds if ((pt = br_get_port(br, args[2])) == NULL) { 2321da177e4SLinus Torvalds rcu_read_unlock(); 2331da177e4SLinus Torvalds return -EINVAL; 2341da177e4SLinus Torvalds } 2351da177e4SLinus Torvalds 2361da177e4SLinus Torvalds memset(&p, 0, sizeof(struct __port_info)); 2371da177e4SLinus Torvalds memcpy(&p.designated_root, &pt->designated_root, 8); 2381da177e4SLinus Torvalds memcpy(&p.designated_bridge, &pt->designated_bridge, 8); 2391da177e4SLinus Torvalds p.port_id = pt->port_id; 2401da177e4SLinus Torvalds p.designated_port = pt->designated_port; 2411da177e4SLinus Torvalds p.path_cost = pt->path_cost; 2421da177e4SLinus Torvalds p.designated_cost = pt->designated_cost; 2431da177e4SLinus Torvalds p.state = pt->state; 2441da177e4SLinus Torvalds p.top_change_ack = pt->topology_change_ack; 2451da177e4SLinus Torvalds p.config_pending = pt->config_pending; 2461da177e4SLinus Torvalds p.message_age_timer_value = br_timer_value(&pt->message_age_timer); 2471da177e4SLinus Torvalds p.forward_delay_timer_value = br_timer_value(&pt->forward_delay_timer); 2481da177e4SLinus Torvalds p.hold_timer_value = br_timer_value(&pt->hold_timer); 2491da177e4SLinus Torvalds 2501da177e4SLinus Torvalds rcu_read_unlock(); 2511da177e4SLinus Torvalds 2521da177e4SLinus Torvalds if (copy_to_user((void __user *)args[1], &p, sizeof(p))) 2531da177e4SLinus Torvalds return -EFAULT; 2541da177e4SLinus Torvalds 2551da177e4SLinus Torvalds return 0; 2561da177e4SLinus Torvalds } 2571da177e4SLinus Torvalds 2581da177e4SLinus Torvalds case BRCTL_SET_BRIDGE_STP_STATE: 2591da177e4SLinus Torvalds if (!capable(CAP_NET_ADMIN)) 2601da177e4SLinus Torvalds return -EPERM; 2611da177e4SLinus Torvalds 2629cde0708SStephen Hemminger br_stp_set_enabled(br, args[1]); 2631da177e4SLinus Torvalds return 0; 2641da177e4SLinus Torvalds 2651da177e4SLinus Torvalds case BRCTL_SET_BRIDGE_PRIORITY: 2661da177e4SLinus Torvalds if (!capable(CAP_NET_ADMIN)) 2671da177e4SLinus Torvalds return -EPERM; 2681da177e4SLinus Torvalds 2691da177e4SLinus Torvalds spin_lock_bh(&br->lock); 2701da177e4SLinus Torvalds br_stp_set_bridge_priority(br, args[1]); 2711da177e4SLinus Torvalds spin_unlock_bh(&br->lock); 2721da177e4SLinus Torvalds return 0; 2731da177e4SLinus Torvalds 2741da177e4SLinus Torvalds case BRCTL_SET_PORT_PRIORITY: 2751da177e4SLinus Torvalds { 2761da177e4SLinus Torvalds struct net_bridge_port *p; 2771da177e4SLinus Torvalds int ret = 0; 2781da177e4SLinus Torvalds 2791da177e4SLinus Torvalds if (!capable(CAP_NET_ADMIN)) 2801da177e4SLinus Torvalds return -EPERM; 2811da177e4SLinus Torvalds 2821da177e4SLinus Torvalds if (args[2] >= (1<<(16-BR_PORT_BITS))) 2831da177e4SLinus Torvalds return -ERANGE; 2841da177e4SLinus Torvalds 2851da177e4SLinus Torvalds spin_lock_bh(&br->lock); 2861da177e4SLinus Torvalds if ((p = br_get_port(br, args[1])) == NULL) 2871da177e4SLinus Torvalds ret = -EINVAL; 2881da177e4SLinus Torvalds else 2891da177e4SLinus Torvalds br_stp_set_port_priority(p, args[2]); 2901da177e4SLinus Torvalds spin_unlock_bh(&br->lock); 2911da177e4SLinus Torvalds return ret; 2921da177e4SLinus Torvalds } 2931da177e4SLinus Torvalds 2941da177e4SLinus Torvalds case BRCTL_SET_PATH_COST: 2951da177e4SLinus Torvalds { 2961da177e4SLinus Torvalds struct net_bridge_port *p; 2971da177e4SLinus Torvalds int ret = 0; 2981da177e4SLinus Torvalds 2991da177e4SLinus Torvalds if (!capable(CAP_NET_ADMIN)) 3001da177e4SLinus Torvalds return -EPERM; 3011da177e4SLinus Torvalds 3021da177e4SLinus Torvalds if ((p = br_get_port(br, args[1])) == NULL) 3031da177e4SLinus Torvalds ret = -EINVAL; 3041da177e4SLinus Torvalds else 3051da177e4SLinus Torvalds br_stp_set_path_cost(p, args[2]); 3066548cda2SStephen Hemminger 3071da177e4SLinus Torvalds return ret; 3081da177e4SLinus Torvalds } 3091da177e4SLinus Torvalds 3101da177e4SLinus Torvalds case BRCTL_GET_FDB_ENTRIES: 3111da177e4SLinus Torvalds return get_fdb_entries(br, (void __user *)args[1], 3121da177e4SLinus Torvalds args[2], args[3]); 3131da177e4SLinus Torvalds } 3141da177e4SLinus Torvalds 3151da177e4SLinus Torvalds return -EOPNOTSUPP; 3161da177e4SLinus Torvalds } 3171da177e4SLinus Torvalds 3184aa678baSAlexey Dobriyan static int old_deviceless(struct net *net, void __user *uarg) 3191da177e4SLinus Torvalds { 3201da177e4SLinus Torvalds unsigned long args[3]; 3211da177e4SLinus Torvalds 3221da177e4SLinus Torvalds if (copy_from_user(args, uarg, sizeof(args))) 3231da177e4SLinus Torvalds return -EFAULT; 3241da177e4SLinus Torvalds 3251da177e4SLinus Torvalds switch (args[0]) { 3261da177e4SLinus Torvalds case BRCTL_GET_VERSION: 3271da177e4SLinus Torvalds return BRCTL_VERSION; 3281da177e4SLinus Torvalds 3291da177e4SLinus Torvalds case BRCTL_GET_BRIDGES: 3301da177e4SLinus Torvalds { 3311da177e4SLinus Torvalds int *indices; 3321da177e4SLinus Torvalds int ret = 0; 3331da177e4SLinus Torvalds 3341da177e4SLinus Torvalds if (args[2] >= 2048) 3351da177e4SLinus Torvalds return -ENOMEM; 3360da974f4SPanagiotis Issaris indices = kcalloc(args[2], sizeof(int), GFP_KERNEL); 3371da177e4SLinus Torvalds if (indices == NULL) 3381da177e4SLinus Torvalds return -ENOMEM; 3391da177e4SLinus Torvalds 3404aa678baSAlexey Dobriyan args[2] = get_bridge_ifindices(net, indices, args[2]); 3411da177e4SLinus Torvalds 3421da177e4SLinus Torvalds ret = copy_to_user((void __user *)args[1], indices, args[2]*sizeof(int)) 3431da177e4SLinus Torvalds ? -EFAULT : args[2]; 3441da177e4SLinus Torvalds 3451da177e4SLinus Torvalds kfree(indices); 3461da177e4SLinus Torvalds return ret; 3471da177e4SLinus Torvalds } 3481da177e4SLinus Torvalds 3491da177e4SLinus Torvalds case BRCTL_ADD_BRIDGE: 3501da177e4SLinus Torvalds case BRCTL_DEL_BRIDGE: 3511da177e4SLinus Torvalds { 3521da177e4SLinus Torvalds char buf[IFNAMSIZ]; 3531da177e4SLinus Torvalds 3541da177e4SLinus Torvalds if (!capable(CAP_NET_ADMIN)) 3551da177e4SLinus Torvalds return -EPERM; 3561da177e4SLinus Torvalds 3571da177e4SLinus Torvalds if (copy_from_user(buf, (void __user *)args[1], IFNAMSIZ)) 3581da177e4SLinus Torvalds return -EFAULT; 3591da177e4SLinus Torvalds 3601da177e4SLinus Torvalds buf[IFNAMSIZ-1] = 0; 3611da177e4SLinus Torvalds 3621da177e4SLinus Torvalds if (args[0] == BRCTL_ADD_BRIDGE) 3634aa678baSAlexey Dobriyan return br_add_bridge(net, buf); 3641da177e4SLinus Torvalds 3654aa678baSAlexey Dobriyan return br_del_bridge(net, buf); 3661da177e4SLinus Torvalds } 3671da177e4SLinus Torvalds } 3681da177e4SLinus Torvalds 3691da177e4SLinus Torvalds return -EOPNOTSUPP; 3701da177e4SLinus Torvalds } 3711da177e4SLinus Torvalds 372881d966bSEric W. Biederman int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *uarg) 3731da177e4SLinus Torvalds { 3741da177e4SLinus Torvalds switch (cmd) { 3751da177e4SLinus Torvalds case SIOCGIFBR: 3761da177e4SLinus Torvalds case SIOCSIFBR: 3774aa678baSAlexey Dobriyan return old_deviceless(net, uarg); 3781da177e4SLinus Torvalds 3791da177e4SLinus Torvalds case SIOCBRADDBR: 3801da177e4SLinus Torvalds case SIOCBRDELBR: 3811da177e4SLinus Torvalds { 3821da177e4SLinus Torvalds char buf[IFNAMSIZ]; 3831da177e4SLinus Torvalds 3841da177e4SLinus Torvalds if (!capable(CAP_NET_ADMIN)) 3851da177e4SLinus Torvalds return -EPERM; 3861da177e4SLinus Torvalds 3871da177e4SLinus Torvalds if (copy_from_user(buf, uarg, IFNAMSIZ)) 3881da177e4SLinus Torvalds return -EFAULT; 3891da177e4SLinus Torvalds 3901da177e4SLinus Torvalds buf[IFNAMSIZ-1] = 0; 3911da177e4SLinus Torvalds if (cmd == SIOCBRADDBR) 3924aa678baSAlexey Dobriyan return br_add_bridge(net, buf); 3931da177e4SLinus Torvalds 3944aa678baSAlexey Dobriyan return br_del_bridge(net, buf); 3951da177e4SLinus Torvalds } 3961da177e4SLinus Torvalds } 3971da177e4SLinus Torvalds return -EOPNOTSUPP; 3981da177e4SLinus Torvalds } 3991da177e4SLinus Torvalds 4001da177e4SLinus Torvalds int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) 4011da177e4SLinus Torvalds { 4021da177e4SLinus Torvalds struct net_bridge *br = netdev_priv(dev); 4031da177e4SLinus Torvalds 4041da177e4SLinus Torvalds switch(cmd) { 4051da177e4SLinus Torvalds case SIOCDEVPRIVATE: 4061da177e4SLinus Torvalds return old_dev_ioctl(dev, rq, cmd); 4071da177e4SLinus Torvalds 4081da177e4SLinus Torvalds case SIOCBRADDIF: 4091da177e4SLinus Torvalds case SIOCBRDELIF: 4101da177e4SLinus Torvalds return add_del_if(br, rq->ifr_ifindex, cmd == SIOCBRADDIF); 4111da177e4SLinus Torvalds 4121da177e4SLinus Torvalds } 4131da177e4SLinus Torvalds 4141da177e4SLinus Torvalds pr_debug("Bridge does not support ioctl 0x%x\n", cmd); 4151da177e4SLinus Torvalds return -EOPNOTSUPP; 4161da177e4SLinus Torvalds } 417