Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Sysfs attributes of bridge ports |
| 3 | * Linux ethernet bridge |
| 4 | * |
| 5 | * Authors: |
| 6 | * Stephen Hemminger <shemminger@osdl.org> |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU General Public License |
| 10 | * as published by the Free Software Foundation; either version |
| 11 | * 2 of the License, or (at your option) any later version. |
| 12 | */ |
| 13 | |
Randy Dunlap | 4fc268d | 2006-01-11 12:17:47 -0800 | [diff] [blame] | 14 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | #include <linux/kernel.h> |
| 16 | #include <linux/netdevice.h> |
| 17 | #include <linux/if_bridge.h> |
| 18 | #include <linux/rtnetlink.h> |
| 19 | #include <linux/spinlock.h> |
| 20 | |
| 21 | #include "br_private.h" |
| 22 | |
| 23 | struct brport_attribute { |
| 24 | struct attribute attr; |
| 25 | ssize_t (*show)(struct net_bridge_port *, char *); |
| 26 | ssize_t (*store)(struct net_bridge_port *, unsigned long); |
| 27 | }; |
| 28 | |
| 29 | #define BRPORT_ATTR(_name,_mode,_show,_store) \ |
| 30 | struct brport_attribute brport_attr_##_name = { \ |
| 31 | .attr = {.name = __stringify(_name), \ |
Tejun Heo | 7b59575 | 2007-06-14 03:45:17 +0900 | [diff] [blame] | 32 | .mode = _mode }, \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | .show = _show, \ |
| 34 | .store = _store, \ |
| 35 | }; |
| 36 | |
| 37 | static ssize_t show_path_cost(struct net_bridge_port *p, char *buf) |
| 38 | { |
| 39 | return sprintf(buf, "%d\n", p->path_cost); |
| 40 | } |
| 41 | static ssize_t store_path_cost(struct net_bridge_port *p, unsigned long v) |
| 42 | { |
| 43 | br_stp_set_path_cost(p, v); |
| 44 | return 0; |
| 45 | } |
| 46 | static BRPORT_ATTR(path_cost, S_IRUGO | S_IWUSR, |
| 47 | show_path_cost, store_path_cost); |
| 48 | |
| 49 | static ssize_t show_priority(struct net_bridge_port *p, char *buf) |
| 50 | { |
| 51 | return sprintf(buf, "%d\n", p->priority); |
| 52 | } |
| 53 | static ssize_t store_priority(struct net_bridge_port *p, unsigned long v) |
| 54 | { |
| 55 | if (v >= (1<<(16-BR_PORT_BITS))) |
| 56 | return -ERANGE; |
| 57 | br_stp_set_port_priority(p, v); |
| 58 | return 0; |
| 59 | } |
| 60 | static BRPORT_ATTR(priority, S_IRUGO | S_IWUSR, |
| 61 | show_priority, store_priority); |
| 62 | |
| 63 | static ssize_t show_designated_root(struct net_bridge_port *p, char *buf) |
| 64 | { |
| 65 | return br_show_bridge_id(buf, &p->designated_root); |
| 66 | } |
| 67 | static BRPORT_ATTR(designated_root, S_IRUGO, show_designated_root, NULL); |
| 68 | |
| 69 | static ssize_t show_designated_bridge(struct net_bridge_port *p, char *buf) |
| 70 | { |
| 71 | return br_show_bridge_id(buf, &p->designated_bridge); |
| 72 | } |
| 73 | static BRPORT_ATTR(designated_bridge, S_IRUGO, show_designated_bridge, NULL); |
| 74 | |
| 75 | static ssize_t show_designated_port(struct net_bridge_port *p, char *buf) |
| 76 | { |
| 77 | return sprintf(buf, "%d\n", p->designated_port); |
| 78 | } |
| 79 | static BRPORT_ATTR(designated_port, S_IRUGO, show_designated_port, NULL); |
| 80 | |
| 81 | static ssize_t show_designated_cost(struct net_bridge_port *p, char *buf) |
| 82 | { |
| 83 | return sprintf(buf, "%d\n", p->designated_cost); |
| 84 | } |
| 85 | static BRPORT_ATTR(designated_cost, S_IRUGO, show_designated_cost, NULL); |
| 86 | |
| 87 | static ssize_t show_port_id(struct net_bridge_port *p, char *buf) |
| 88 | { |
| 89 | return sprintf(buf, "0x%x\n", p->port_id); |
| 90 | } |
| 91 | static BRPORT_ATTR(port_id, S_IRUGO, show_port_id, NULL); |
| 92 | |
| 93 | static ssize_t show_port_no(struct net_bridge_port *p, char *buf) |
| 94 | { |
| 95 | return sprintf(buf, "0x%x\n", p->port_no); |
| 96 | } |
| 97 | |
| 98 | static BRPORT_ATTR(port_no, S_IRUGO, show_port_no, NULL); |
| 99 | |
| 100 | static ssize_t show_change_ack(struct net_bridge_port *p, char *buf) |
| 101 | { |
| 102 | return sprintf(buf, "%d\n", p->topology_change_ack); |
| 103 | } |
| 104 | static BRPORT_ATTR(change_ack, S_IRUGO, show_change_ack, NULL); |
| 105 | |
| 106 | static ssize_t show_config_pending(struct net_bridge_port *p, char *buf) |
| 107 | { |
| 108 | return sprintf(buf, "%d\n", p->config_pending); |
| 109 | } |
| 110 | static BRPORT_ATTR(config_pending, S_IRUGO, show_config_pending, NULL); |
| 111 | |
| 112 | static ssize_t show_port_state(struct net_bridge_port *p, char *buf) |
| 113 | { |
| 114 | return sprintf(buf, "%d\n", p->state); |
| 115 | } |
| 116 | static BRPORT_ATTR(state, S_IRUGO, show_port_state, NULL); |
| 117 | |
| 118 | static ssize_t show_message_age_timer(struct net_bridge_port *p, |
| 119 | char *buf) |
| 120 | { |
| 121 | return sprintf(buf, "%ld\n", br_timer_value(&p->message_age_timer)); |
| 122 | } |
| 123 | static BRPORT_ATTR(message_age_timer, S_IRUGO, show_message_age_timer, NULL); |
| 124 | |
| 125 | static ssize_t show_forward_delay_timer(struct net_bridge_port *p, |
| 126 | char *buf) |
| 127 | { |
| 128 | return sprintf(buf, "%ld\n", br_timer_value(&p->forward_delay_timer)); |
| 129 | } |
| 130 | static BRPORT_ATTR(forward_delay_timer, S_IRUGO, show_forward_delay_timer, NULL); |
| 131 | |
| 132 | static ssize_t show_hold_timer(struct net_bridge_port *p, |
| 133 | char *buf) |
| 134 | { |
| 135 | return sprintf(buf, "%ld\n", br_timer_value(&p->hold_timer)); |
| 136 | } |
| 137 | static BRPORT_ATTR(hold_timer, S_IRUGO, show_hold_timer, NULL); |
| 138 | |
Stephen Hemminger | 9cf6374 | 2007-04-09 12:57:54 -0700 | [diff] [blame] | 139 | static ssize_t store_flush(struct net_bridge_port *p, unsigned long v) |
| 140 | { |
| 141 | br_fdb_delete_by_port(p->br, p, 0); // Don't delete local entry |
| 142 | return 0; |
| 143 | } |
| 144 | static BRPORT_ATTR(flush, S_IWUSR, NULL, store_flush); |
| 145 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | static struct brport_attribute *brport_attrs[] = { |
| 147 | &brport_attr_path_cost, |
| 148 | &brport_attr_priority, |
| 149 | &brport_attr_port_id, |
| 150 | &brport_attr_port_no, |
| 151 | &brport_attr_designated_root, |
| 152 | &brport_attr_designated_bridge, |
| 153 | &brport_attr_designated_port, |
| 154 | &brport_attr_designated_cost, |
| 155 | &brport_attr_state, |
| 156 | &brport_attr_change_ack, |
| 157 | &brport_attr_config_pending, |
| 158 | &brport_attr_message_age_timer, |
| 159 | &brport_attr_forward_delay_timer, |
| 160 | &brport_attr_hold_timer, |
Stephen Hemminger | 9cf6374 | 2007-04-09 12:57:54 -0700 | [diff] [blame] | 161 | &brport_attr_flush, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | NULL |
| 163 | }; |
| 164 | |
| 165 | #define to_brport_attr(_at) container_of(_at, struct brport_attribute, attr) |
| 166 | #define to_brport(obj) container_of(obj, struct net_bridge_port, kobj) |
| 167 | |
| 168 | static ssize_t brport_show(struct kobject * kobj, |
| 169 | struct attribute * attr, char * buf) |
| 170 | { |
| 171 | struct brport_attribute * brport_attr = to_brport_attr(attr); |
| 172 | struct net_bridge_port * p = to_brport(kobj); |
| 173 | |
| 174 | return brport_attr->show(p, buf); |
| 175 | } |
| 176 | |
| 177 | static ssize_t brport_store(struct kobject * kobj, |
| 178 | struct attribute * attr, |
| 179 | const char * buf, size_t count) |
| 180 | { |
| 181 | struct brport_attribute * brport_attr = to_brport_attr(attr); |
| 182 | struct net_bridge_port * p = to_brport(kobj); |
| 183 | ssize_t ret = -EINVAL; |
| 184 | char *endp; |
| 185 | unsigned long val; |
| 186 | |
| 187 | if (!capable(CAP_NET_ADMIN)) |
| 188 | return -EPERM; |
| 189 | |
| 190 | val = simple_strtoul(buf, &endp, 0); |
| 191 | if (endp != buf) { |
Eric W. Biederman | af38f29 | 2009-05-13 17:00:41 +0000 | [diff] [blame] | 192 | if (!rtnl_trylock()) |
| 193 | return restart_syscall(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | if (p->dev && p->br && brport_attr->store) { |
| 195 | spin_lock_bh(&p->br->lock); |
| 196 | ret = brport_attr->store(p, val); |
| 197 | spin_unlock_bh(&p->br->lock); |
| 198 | if (ret == 0) |
| 199 | ret = count; |
| 200 | } |
| 201 | rtnl_unlock(); |
| 202 | } |
| 203 | return ret; |
| 204 | } |
| 205 | |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 206 | struct sysfs_ops brport_sysfs_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | .show = brport_show, |
| 208 | .store = brport_store, |
| 209 | }; |
| 210 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | /* |
| 212 | * Add sysfs entries to ethernet device added to a bridge. |
| 213 | * Creates a brport subdirectory with bridge attributes. |
| 214 | * Puts symlink in bridge's brport subdirectory |
| 215 | */ |
| 216 | int br_sysfs_addif(struct net_bridge_port *p) |
| 217 | { |
| 218 | struct net_bridge *br = p->br; |
| 219 | struct brport_attribute **a; |
| 220 | int err; |
| 221 | |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 222 | err = sysfs_create_link(&p->kobj, &br->dev->dev.kobj, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | SYSFS_BRIDGE_PORT_LINK); |
| 224 | if (err) |
| 225 | goto out2; |
| 226 | |
| 227 | for (a = brport_attrs; *a; ++a) { |
| 228 | err = sysfs_create_file(&p->kobj, &((*a)->attr)); |
| 229 | if (err) |
| 230 | goto out2; |
| 231 | } |
| 232 | |
Greg Kroah-Hartman | 43b98c4 | 2007-12-17 15:54:39 -0400 | [diff] [blame] | 233 | err = sysfs_create_link(br->ifobj, &p->kobj, p->dev->name); |
Stephen Hemminger | bab1dee | 2006-02-09 17:10:12 -0800 | [diff] [blame] | 234 | out2: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | return err; |
| 236 | } |