| /* |
| * Ioctl handler |
| * Linux ethernet bridge |
| * |
| * Authors: |
| * Lennert Buytenhek <buytenh@gnu.org> |
| * |
| * $Id: br_ioctl.c,v 1.4 2000/11/08 05:16:40 davem Exp $ |
| * |
| * 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/kernel.h> |
| #include <linux/if_bridge.h> |
| #include <linux/inetdevice.h> |
| #include <asm/uaccess.h> |
| #include "br_private.h" |
| |
| static int br_ioctl_device(struct net_bridge *br, |
| unsigned int cmd, |
| unsigned long arg0, |
| unsigned long arg1, |
| unsigned long arg2) |
| { |
| if (br == NULL) |
| return -EINVAL; |
| |
| switch (cmd) |
| { |
| case BRCTL_ADD_IF: |
| case BRCTL_DEL_IF: |
| { |
| struct net_device *dev; |
| int ret; |
| |
| dev = dev_get_by_index(arg0); |
| if (dev == NULL) |
| return -EINVAL; |
| |
| if (cmd == BRCTL_ADD_IF) |
| ret = br_add_if(br, dev); |
| else |
| ret = br_del_if(br, dev); |
| |
| dev_put(dev); |
| return ret; |
| } |
| |
| case BRCTL_GET_BRIDGE_INFO: |
| { |
| struct __bridge_info b; |
| |
| memset(&b, 0, sizeof(struct __bridge_info)); |
| memcpy(&b.designated_root, &br->designated_root, 8); |
| memcpy(&b.bridge_id, &br->bridge_id, 8); |
| b.root_path_cost = br->root_path_cost; |
| b.max_age = br->max_age; |
| b.hello_time = br->hello_time; |
| b.forward_delay = br->forward_delay; |
| b.bridge_max_age = br->bridge_max_age; |
| b.bridge_hello_time = br->bridge_hello_time; |
| b.bridge_forward_delay = br->bridge_forward_delay; |
| b.topology_change = br->topology_change; |
| b.topology_change_detected = br->topology_change_detected; |
| b.root_port = br->root_port; |
| b.stp_enabled = br->stp_enabled; |
| b.ageing_time = br->ageing_time; |
| b.gc_interval = br->gc_interval; |
| b.hello_timer_value = br_timer_get_residue(&br->hello_timer); |
| b.tcn_timer_value = br_timer_get_residue(&br->tcn_timer); |
| b.topology_change_timer_value = br_timer_get_residue(&br->topology_change_timer); |
| b.gc_timer_value = br_timer_get_residue(&br->gc_timer); |
| |
| if (copy_to_user((void *)arg0, &b, sizeof(b))) |
| return -EFAULT; |
| |
| return 0; |
| } |
| |
| case BRCTL_GET_PORT_LIST: |
| { |
| int i; |
| int indices[256]; |
| |
| for (i=0;i<256;i++) |
| indices[i] = 0; |
| |
| br_get_port_ifindices(br, indices); |
| if (copy_to_user((void *)arg0, indices, 256*sizeof(int))) |
| return -EFAULT; |
| |
| return 0; |
| } |
| |
| case BRCTL_SET_BRIDGE_FORWARD_DELAY: |
| br->bridge_forward_delay = arg0; |
| if (br_is_root_bridge(br)) |
| br->forward_delay = arg0; |
| return 0; |
| |
| case BRCTL_SET_BRIDGE_HELLO_TIME: |
| br->bridge_hello_time = arg0; |
| if (br_is_root_bridge(br)) |
| br->hello_time = arg0; |
| return 0; |
| |
| case BRCTL_SET_BRIDGE_MAX_AGE: |
| br->bridge_max_age = arg0; |
| if (br_is_root_bridge(br)) |
| br->max_age = arg0; |
| return 0; |
| |
| case BRCTL_SET_AGEING_TIME: |
| br->ageing_time = arg0; |
| return 0; |
| |
| case BRCTL_SET_GC_INTERVAL: |
| br->gc_interval = arg0; |
| return 0; |
| |
| case BRCTL_GET_PORT_INFO: |
| { |
| struct __port_info p; |
| struct net_bridge_port *pt; |
| |
| if ((pt = br_get_port(br, arg1)) == NULL) |
| return -EINVAL; |
| |
| memset(&p, 0, sizeof(struct __port_info)); |
| memcpy(&p.designated_root, &pt->designated_root, 8); |
| memcpy(&p.designated_bridge, &pt->designated_bridge, 8); |
| p.port_id = pt->port_id; |
| p.designated_port = pt->designated_port; |
| p.path_cost = pt->path_cost; |
| p.designated_cost = pt->designated_cost; |
| p.state = pt->state; |
| p.top_change_ack = pt->topology_change_ack; |
| p.config_pending = pt->config_pending; |
| p.message_age_timer_value = br_timer_get_residue(&pt->message_age_timer); |
| p.forward_delay_timer_value = br_timer_get_residue(&pt->forward_delay_timer); |
| p.hold_timer_value = br_timer_get_residue(&pt->hold_timer); |
| |
| if (copy_to_user((void *)arg0, &p, sizeof(p))) |
| return -EFAULT; |
| |
| return 0; |
| } |
| |
| case BRCTL_SET_BRIDGE_STP_STATE: |
| br->stp_enabled = arg0?1:0; |
| return 0; |
| |
| case BRCTL_SET_BRIDGE_PRIORITY: |
| br_stp_set_bridge_priority(br, arg0); |
| return 0; |
| |
| case BRCTL_SET_PORT_PRIORITY: |
| { |
| struct net_bridge_port *p; |
| |
| if ((p = br_get_port(br, arg0)) == NULL) |
| return -EINVAL; |
| br_stp_set_port_priority(p, arg1); |
| return 0; |
| } |
| |
| case BRCTL_SET_PATH_COST: |
| { |
| struct net_bridge_port *p; |
| |
| if ((p = br_get_port(br, arg0)) == NULL) |
| return -EINVAL; |
| br_stp_set_path_cost(p, arg1); |
| return 0; |
| } |
| |
| case BRCTL_GET_FDB_ENTRIES: |
| return br_fdb_get_entries(br, (void *)arg0, arg1, arg2); |
| } |
| |
| return -EOPNOTSUPP; |
| } |
| |
| static int br_ioctl_deviceless(unsigned int cmd, |
| unsigned long arg0, |
| unsigned long arg1) |
| { |
| switch (cmd) |
| { |
| case BRCTL_GET_VERSION: |
| return BRCTL_VERSION; |
| |
| case BRCTL_GET_BRIDGES: |
| { |
| int i; |
| int indices[64]; |
| |
| for (i=0;i<64;i++) |
| indices[i] = 0; |
| |
| if (arg1 > 64) |
| arg1 = 64; |
| arg1 = br_get_bridge_ifindices(indices, arg1); |
| if (copy_to_user((void *)arg0, indices, arg1*sizeof(int))) |
| return -EFAULT; |
| |
| return arg1; |
| } |
| |
| case BRCTL_ADD_BRIDGE: |
| case BRCTL_DEL_BRIDGE: |
| { |
| char buf[IFNAMSIZ]; |
| |
| if (copy_from_user(buf, (void *)arg0, IFNAMSIZ)) |
| return -EFAULT; |
| |
| buf[IFNAMSIZ-1] = 0; |
| |
| if (cmd == BRCTL_ADD_BRIDGE) |
| return br_add_bridge(buf); |
| |
| return br_del_bridge(buf); |
| } |
| } |
| |
| return -EOPNOTSUPP; |
| } |
| |
| DECLARE_MUTEX(ioctl_mutex); |
| |
| int br_ioctl_deviceless_stub(unsigned long arg) |
| { |
| int err; |
| unsigned long i[3]; |
| |
| if (!capable(CAP_NET_ADMIN)) |
| return -EPERM; |
| |
| if (copy_from_user(i, (void *)arg, 3*sizeof(unsigned long))) |
| return -EFAULT; |
| |
| down(&ioctl_mutex); |
| err = br_ioctl_deviceless(i[0], i[1], i[2]); |
| up(&ioctl_mutex); |
| |
| return err; |
| } |
| |
| int br_ioctl(struct net_bridge *br, unsigned int cmd, unsigned long arg0, unsigned long arg1, unsigned long arg2) |
| { |
| int err; |
| |
| if (!capable(CAP_NET_ADMIN)) |
| return -EPERM; |
| |
| down(&ioctl_mutex); |
| err = br_ioctl_deviceless(cmd, arg0, arg1); |
| if (err == -EOPNOTSUPP) |
| err = br_ioctl_device(br, cmd, arg0, arg1, arg2); |
| up(&ioctl_mutex); |
| |
| return err; |
| } |
| |
| void br_call_ioctl_atomic(void (*fn)(void)) |
| { |
| down(&ioctl_mutex); |
| fn(); |
| up(&ioctl_mutex); |
| } |