diff options
Diffstat (limited to 'net/bridge/br_ioctl.c')
| -rw-r--r-- | net/bridge/br_ioctl.c | 264 |
1 files changed, 264 insertions, 0 deletions
diff --git a/net/bridge/br_ioctl.c b/net/bridge/br_ioctl.c new file mode 100644 index 000000000..8830cd747 --- /dev/null +++ b/net/bridge/br_ioctl.c @@ -0,0 +1,264 @@ +/* + * Ioctl handler + * Linux ethernet bridge + * + * Authors: + * Lennert Buytenhek <buytenh@gnu.org> + * + * $Id: br_ioctl.c,v 1.1 2000/02/18 16:47:12 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; + + 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 indices[256]; + + 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; + + 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 -EINVAL; + + 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 indices[64]; + + 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); +} |