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 *); |
stephen hemminger | 14f98f2 | 2011-04-04 14:03:33 +0000 | [diff] [blame] | 26 | int (*store)(struct net_bridge_port *, unsigned long); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | }; |
| 28 | |
tanxiaojun | 31a5b83 | 2013-12-19 13:28:12 +0800 | [diff] [blame^] | 29 | #define BRPORT_ATTR(_name, _mode, _show, _store) \ |
stephen hemminger | 5a0d513 | 2012-07-30 08:55:49 +0000 | [diff] [blame] | 30 | const struct brport_attribute brport_attr_##_name = { \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
stephen hemminger | cd75373 | 2012-11-13 07:53:06 +0000 | [diff] [blame] | 37 | #define BRPORT_ATTR_FLAG(_name, _mask) \ |
| 38 | static ssize_t show_##_name(struct net_bridge_port *p, char *buf) \ |
| 39 | { \ |
| 40 | return sprintf(buf, "%d\n", !!(p->flags & _mask)); \ |
| 41 | } \ |
| 42 | static int store_##_name(struct net_bridge_port *p, unsigned long v) \ |
| 43 | { \ |
| 44 | unsigned long flags = p->flags; \ |
| 45 | if (v) \ |
| 46 | flags |= _mask; \ |
| 47 | else \ |
| 48 | flags &= ~_mask; \ |
| 49 | if (flags != p->flags) { \ |
| 50 | p->flags = flags; \ |
| 51 | br_ifinfo_notify(RTM_NEWLINK, p); \ |
| 52 | } \ |
| 53 | return 0; \ |
| 54 | } \ |
| 55 | static BRPORT_ATTR(_name, S_IRUGO | S_IWUSR, \ |
| 56 | show_##_name, store_##_name) |
| 57 | |
| 58 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | static ssize_t show_path_cost(struct net_bridge_port *p, char *buf) |
| 60 | { |
| 61 | return sprintf(buf, "%d\n", p->path_cost); |
| 62 | } |
stephen hemminger | 14f98f2 | 2011-04-04 14:03:33 +0000 | [diff] [blame] | 63 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | static BRPORT_ATTR(path_cost, S_IRUGO | S_IWUSR, |
stephen hemminger | 14f98f2 | 2011-04-04 14:03:33 +0000 | [diff] [blame] | 65 | show_path_cost, br_stp_set_path_cost); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | |
| 67 | static ssize_t show_priority(struct net_bridge_port *p, char *buf) |
| 68 | { |
| 69 | return sprintf(buf, "%d\n", p->priority); |
| 70 | } |
stephen hemminger | 14f98f2 | 2011-04-04 14:03:33 +0000 | [diff] [blame] | 71 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | static BRPORT_ATTR(priority, S_IRUGO | S_IWUSR, |
stephen hemminger | 14f98f2 | 2011-04-04 14:03:33 +0000 | [diff] [blame] | 73 | show_priority, br_stp_set_port_priority); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | |
| 75 | static ssize_t show_designated_root(struct net_bridge_port *p, char *buf) |
| 76 | { |
| 77 | return br_show_bridge_id(buf, &p->designated_root); |
| 78 | } |
| 79 | static BRPORT_ATTR(designated_root, S_IRUGO, show_designated_root, NULL); |
| 80 | |
| 81 | static ssize_t show_designated_bridge(struct net_bridge_port *p, char *buf) |
| 82 | { |
| 83 | return br_show_bridge_id(buf, &p->designated_bridge); |
| 84 | } |
| 85 | static BRPORT_ATTR(designated_bridge, S_IRUGO, show_designated_bridge, NULL); |
| 86 | |
| 87 | static ssize_t show_designated_port(struct net_bridge_port *p, char *buf) |
| 88 | { |
| 89 | return sprintf(buf, "%d\n", p->designated_port); |
| 90 | } |
| 91 | static BRPORT_ATTR(designated_port, S_IRUGO, show_designated_port, NULL); |
| 92 | |
| 93 | static ssize_t show_designated_cost(struct net_bridge_port *p, char *buf) |
| 94 | { |
| 95 | return sprintf(buf, "%d\n", p->designated_cost); |
| 96 | } |
| 97 | static BRPORT_ATTR(designated_cost, S_IRUGO, show_designated_cost, NULL); |
| 98 | |
| 99 | static ssize_t show_port_id(struct net_bridge_port *p, char *buf) |
| 100 | { |
| 101 | return sprintf(buf, "0x%x\n", p->port_id); |
| 102 | } |
| 103 | static BRPORT_ATTR(port_id, S_IRUGO, show_port_id, NULL); |
| 104 | |
| 105 | static ssize_t show_port_no(struct net_bridge_port *p, char *buf) |
| 106 | { |
| 107 | return sprintf(buf, "0x%x\n", p->port_no); |
| 108 | } |
| 109 | |
| 110 | static BRPORT_ATTR(port_no, S_IRUGO, show_port_no, NULL); |
| 111 | |
| 112 | static ssize_t show_change_ack(struct net_bridge_port *p, char *buf) |
| 113 | { |
| 114 | return sprintf(buf, "%d\n", p->topology_change_ack); |
| 115 | } |
| 116 | static BRPORT_ATTR(change_ack, S_IRUGO, show_change_ack, NULL); |
| 117 | |
| 118 | static ssize_t show_config_pending(struct net_bridge_port *p, char *buf) |
| 119 | { |
| 120 | return sprintf(buf, "%d\n", p->config_pending); |
| 121 | } |
| 122 | static BRPORT_ATTR(config_pending, S_IRUGO, show_config_pending, NULL); |
| 123 | |
| 124 | static ssize_t show_port_state(struct net_bridge_port *p, char *buf) |
| 125 | { |
| 126 | return sprintf(buf, "%d\n", p->state); |
| 127 | } |
| 128 | static BRPORT_ATTR(state, S_IRUGO, show_port_state, NULL); |
| 129 | |
| 130 | static ssize_t show_message_age_timer(struct net_bridge_port *p, |
| 131 | char *buf) |
| 132 | { |
| 133 | return sprintf(buf, "%ld\n", br_timer_value(&p->message_age_timer)); |
| 134 | } |
| 135 | static BRPORT_ATTR(message_age_timer, S_IRUGO, show_message_age_timer, NULL); |
| 136 | |
| 137 | static ssize_t show_forward_delay_timer(struct net_bridge_port *p, |
| 138 | char *buf) |
| 139 | { |
| 140 | return sprintf(buf, "%ld\n", br_timer_value(&p->forward_delay_timer)); |
| 141 | } |
| 142 | static BRPORT_ATTR(forward_delay_timer, S_IRUGO, show_forward_delay_timer, NULL); |
| 143 | |
| 144 | static ssize_t show_hold_timer(struct net_bridge_port *p, |
| 145 | char *buf) |
| 146 | { |
| 147 | return sprintf(buf, "%ld\n", br_timer_value(&p->hold_timer)); |
| 148 | } |
| 149 | static BRPORT_ATTR(hold_timer, S_IRUGO, show_hold_timer, NULL); |
| 150 | |
stephen hemminger | 14f98f2 | 2011-04-04 14:03:33 +0000 | [diff] [blame] | 151 | static int store_flush(struct net_bridge_port *p, unsigned long v) |
Stephen Hemminger | 9cf6374 | 2007-04-09 12:57:54 -0700 | [diff] [blame] | 152 | { |
| 153 | br_fdb_delete_by_port(p->br, p, 0); // Don't delete local entry |
| 154 | return 0; |
| 155 | } |
| 156 | static BRPORT_ATTR(flush, S_IWUSR, NULL, store_flush); |
| 157 | |
stephen hemminger | cd75373 | 2012-11-13 07:53:06 +0000 | [diff] [blame] | 158 | BRPORT_ATTR_FLAG(hairpin_mode, BR_HAIRPIN_MODE); |
stephen hemminger | a2e01a6 | 2012-11-13 07:53:07 +0000 | [diff] [blame] | 159 | BRPORT_ATTR_FLAG(bpdu_guard, BR_BPDU_GUARD); |
stephen hemminger | 1007dd1 | 2012-11-13 07:53:08 +0000 | [diff] [blame] | 160 | BRPORT_ATTR_FLAG(root_block, BR_ROOT_BLOCK); |
Vlad Yasevich | 9ba1889 | 2013-06-05 10:08:00 -0400 | [diff] [blame] | 161 | BRPORT_ATTR_FLAG(learning, BR_LEARNING); |
Vlad Yasevich | 867a594 | 2013-06-05 10:08:01 -0400 | [diff] [blame] | 162 | BRPORT_ATTR_FLAG(unicast_flood, BR_FLOOD); |
Fischer, Anna | 3982d3d | 2009-08-13 06:55:16 +0000 | [diff] [blame] | 163 | |
Herbert Xu | 0909e11 | 2010-02-27 19:41:49 +0000 | [diff] [blame] | 164 | #ifdef CONFIG_BRIDGE_IGMP_SNOOPING |
| 165 | static ssize_t show_multicast_router(struct net_bridge_port *p, char *buf) |
| 166 | { |
| 167 | return sprintf(buf, "%d\n", p->multicast_router); |
| 168 | } |
| 169 | |
stephen hemminger | 14f98f2 | 2011-04-04 14:03:33 +0000 | [diff] [blame] | 170 | static int store_multicast_router(struct net_bridge_port *p, |
Herbert Xu | 0909e11 | 2010-02-27 19:41:49 +0000 | [diff] [blame] | 171 | unsigned long v) |
| 172 | { |
| 173 | return br_multicast_set_port_router(p, v); |
| 174 | } |
| 175 | static BRPORT_ATTR(multicast_router, S_IRUGO | S_IWUSR, show_multicast_router, |
| 176 | store_multicast_router); |
Amerigo Wang | 50426b5 | 2012-12-03 23:56:40 +0000 | [diff] [blame] | 177 | |
David S. Miller | c2d3bab | 2012-12-05 16:24:45 -0500 | [diff] [blame] | 178 | BRPORT_ATTR_FLAG(multicast_fast_leave, BR_MULTICAST_FAST_LEAVE); |
Herbert Xu | 0909e11 | 2010-02-27 19:41:49 +0000 | [diff] [blame] | 179 | #endif |
| 180 | |
stephen hemminger | 5a0d513 | 2012-07-30 08:55:49 +0000 | [diff] [blame] | 181 | static const struct brport_attribute *brport_attrs[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | &brport_attr_path_cost, |
| 183 | &brport_attr_priority, |
| 184 | &brport_attr_port_id, |
| 185 | &brport_attr_port_no, |
| 186 | &brport_attr_designated_root, |
| 187 | &brport_attr_designated_bridge, |
| 188 | &brport_attr_designated_port, |
| 189 | &brport_attr_designated_cost, |
| 190 | &brport_attr_state, |
| 191 | &brport_attr_change_ack, |
| 192 | &brport_attr_config_pending, |
| 193 | &brport_attr_message_age_timer, |
| 194 | &brport_attr_forward_delay_timer, |
| 195 | &brport_attr_hold_timer, |
Stephen Hemminger | 9cf6374 | 2007-04-09 12:57:54 -0700 | [diff] [blame] | 196 | &brport_attr_flush, |
Fischer, Anna | 3982d3d | 2009-08-13 06:55:16 +0000 | [diff] [blame] | 197 | &brport_attr_hairpin_mode, |
stephen hemminger | a2e01a6 | 2012-11-13 07:53:07 +0000 | [diff] [blame] | 198 | &brport_attr_bpdu_guard, |
stephen hemminger | 1007dd1 | 2012-11-13 07:53:08 +0000 | [diff] [blame] | 199 | &brport_attr_root_block, |
Vlad Yasevich | 9ba1889 | 2013-06-05 10:08:00 -0400 | [diff] [blame] | 200 | &brport_attr_learning, |
Vlad Yasevich | 867a594 | 2013-06-05 10:08:01 -0400 | [diff] [blame] | 201 | &brport_attr_unicast_flood, |
Herbert Xu | 0909e11 | 2010-02-27 19:41:49 +0000 | [diff] [blame] | 202 | #ifdef CONFIG_BRIDGE_IGMP_SNOOPING |
| 203 | &brport_attr_multicast_router, |
Amerigo Wang | 50426b5 | 2012-12-03 23:56:40 +0000 | [diff] [blame] | 204 | &brport_attr_multicast_fast_leave, |
Herbert Xu | 0909e11 | 2010-02-27 19:41:49 +0000 | [diff] [blame] | 205 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | NULL |
| 207 | }; |
| 208 | |
| 209 | #define to_brport_attr(_at) container_of(_at, struct brport_attribute, attr) |
| 210 | #define to_brport(obj) container_of(obj, struct net_bridge_port, kobj) |
| 211 | |
| 212 | static ssize_t brport_show(struct kobject * kobj, |
| 213 | struct attribute * attr, char * buf) |
| 214 | { |
| 215 | struct brport_attribute * brport_attr = to_brport_attr(attr); |
| 216 | struct net_bridge_port * p = to_brport(kobj); |
| 217 | |
| 218 | return brport_attr->show(p, buf); |
| 219 | } |
| 220 | |
| 221 | static ssize_t brport_store(struct kobject * kobj, |
| 222 | struct attribute * attr, |
| 223 | const char * buf, size_t count) |
| 224 | { |
| 225 | struct brport_attribute * brport_attr = to_brport_attr(attr); |
| 226 | struct net_bridge_port * p = to_brport(kobj); |
| 227 | ssize_t ret = -EINVAL; |
| 228 | char *endp; |
| 229 | unsigned long val; |
| 230 | |
Eric W. Biederman | cb99050 | 2012-11-16 03:03:08 +0000 | [diff] [blame] | 231 | if (!ns_capable(dev_net(p->dev)->user_ns, CAP_NET_ADMIN)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | return -EPERM; |
| 233 | |
| 234 | val = simple_strtoul(buf, &endp, 0); |
| 235 | if (endp != buf) { |
Eric W. Biederman | af38f29 | 2009-05-13 17:00:41 +0000 | [diff] [blame] | 236 | if (!rtnl_trylock()) |
| 237 | return restart_syscall(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | if (p->dev && p->br && brport_attr->store) { |
| 239 | spin_lock_bh(&p->br->lock); |
| 240 | ret = brport_attr->store(p, val); |
| 241 | spin_unlock_bh(&p->br->lock); |
| 242 | if (ret == 0) |
| 243 | ret = count; |
| 244 | } |
| 245 | rtnl_unlock(); |
| 246 | } |
| 247 | return ret; |
| 248 | } |
| 249 | |
Emese Revfy | 52cf25d | 2010-01-19 02:58:23 +0100 | [diff] [blame] | 250 | const struct sysfs_ops brport_sysfs_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | .show = brport_show, |
| 252 | .store = brport_store, |
| 253 | }; |
| 254 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | /* |
| 256 | * Add sysfs entries to ethernet device added to a bridge. |
| 257 | * Creates a brport subdirectory with bridge attributes. |
Simon Arlott | e0f4375 | 2010-05-10 09:31:11 +0000 | [diff] [blame] | 258 | * Puts symlink in bridge's brif subdirectory |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | */ |
| 260 | int br_sysfs_addif(struct net_bridge_port *p) |
| 261 | { |
| 262 | struct net_bridge *br = p->br; |
stephen hemminger | 5a0d513 | 2012-07-30 08:55:49 +0000 | [diff] [blame] | 263 | const struct brport_attribute **a; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | int err; |
| 265 | |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 266 | err = sysfs_create_link(&p->kobj, &br->dev->dev.kobj, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | SYSFS_BRIDGE_PORT_LINK); |
| 268 | if (err) |
Simon Arlott | e0f4375 | 2010-05-10 09:31:11 +0000 | [diff] [blame] | 269 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | |
| 271 | for (a = brport_attrs; *a; ++a) { |
| 272 | err = sysfs_create_file(&p->kobj, &((*a)->attr)); |
| 273 | if (err) |
Simon Arlott | e0f4375 | 2010-05-10 09:31:11 +0000 | [diff] [blame] | 274 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | } |
| 276 | |
Simon Arlott | e0f4375 | 2010-05-10 09:31:11 +0000 | [diff] [blame] | 277 | strlcpy(p->sysfs_name, p->dev->name, IFNAMSIZ); |
| 278 | return sysfs_create_link(br->ifobj, &p->kobj, p->sysfs_name); |
| 279 | } |
| 280 | |
| 281 | /* Rename bridge's brif symlink */ |
| 282 | int br_sysfs_renameif(struct net_bridge_port *p) |
| 283 | { |
| 284 | struct net_bridge *br = p->br; |
| 285 | int err; |
| 286 | |
| 287 | /* If a rename fails, the rollback will cause another |
| 288 | * rename call with the existing name. |
| 289 | */ |
| 290 | if (!strncmp(p->sysfs_name, p->dev->name, IFNAMSIZ)) |
| 291 | return 0; |
| 292 | |
| 293 | err = sysfs_rename_link(br->ifobj, &p->kobj, |
| 294 | p->sysfs_name, p->dev->name); |
| 295 | if (err) |
| 296 | netdev_notice(br->dev, "unable to rename link %s to %s", |
| 297 | p->sysfs_name, p->dev->name); |
| 298 | else |
| 299 | strlcpy(p->sysfs_name, p->dev->name, IFNAMSIZ); |
| 300 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | return err; |
| 302 | } |