2 * Copyright (c) 2007-2012 Nicira, Inc.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of version 2 of the GNU General Public
6 * License as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
19 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
21 #include <linux/capability.h>
22 #include <linux/kernel.h>
23 #include <linux/netdevice.h>
24 #include <linux/if_bridge.h>
25 #include <linux/rtnetlink.h>
33 struct brport_attribute {
34 struct attribute attr;
35 ssize_t (*show)(struct vport *, char *);
36 ssize_t (*store)(struct vport *, unsigned long);
39 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36)
40 #define BRPORT_ATTR(_name, _mode, _show, _store) \
41 struct brport_attribute brport_attr_##_name = { \
42 .attr = {.name = __stringify(_name), \
48 #define BRPORT_ATTR(_name, _mode, _show, _store) \
49 struct brport_attribute brport_attr_##_name = { \
50 .attr = {.name = __stringify(_name), \
52 .owner = THIS_MODULE, }, \
58 static ssize_t show_path_cost(struct vport *p, char *buf)
60 return sprintf(buf, "%d\n", 0);
62 static ssize_t store_path_cost(struct vport *p, unsigned long v)
66 static BRPORT_ATTR(path_cost, S_IRUGO | S_IWUSR,
67 show_path_cost, store_path_cost);
69 static ssize_t show_priority(struct vport *p, char *buf)
71 return sprintf(buf, "%d\n", 0);
73 static ssize_t store_priority(struct vport *p, unsigned long v)
77 static BRPORT_ATTR(priority, S_IRUGO | S_IWUSR,
78 show_priority, store_priority);
80 static ssize_t show_designated_root(struct vport *p, char *buf)
82 return sprintf(buf, "0000.010203040506\n");
84 static BRPORT_ATTR(designated_root, S_IRUGO, show_designated_root, NULL);
86 static ssize_t show_designated_bridge(struct vport *p, char *buf)
88 return sprintf(buf, "0000.060504030201\n");
90 static BRPORT_ATTR(designated_bridge, S_IRUGO, show_designated_bridge, NULL);
92 static ssize_t show_designated_port(struct vport *p, char *buf)
94 return sprintf(buf, "%d\n", 0);
96 static BRPORT_ATTR(designated_port, S_IRUGO, show_designated_port, NULL);
98 static ssize_t show_designated_cost(struct vport *p, char *buf)
100 return sprintf(buf, "%d\n", 0);
102 static BRPORT_ATTR(designated_cost, S_IRUGO, show_designated_cost, NULL);
104 static ssize_t show_port_id(struct vport *p, char *buf)
106 return sprintf(buf, "0x%x\n", 0);
108 static BRPORT_ATTR(port_id, S_IRUGO, show_port_id, NULL);
110 static ssize_t show_port_no(struct vport *p, char *buf)
112 return sprintf(buf, "0x%x\n", p->port_no);
115 static BRPORT_ATTR(port_no, S_IRUGO, show_port_no, NULL);
117 static ssize_t show_change_ack(struct vport *p, char *buf)
119 return sprintf(buf, "%d\n", 0);
121 static BRPORT_ATTR(change_ack, S_IRUGO, show_change_ack, NULL);
123 static ssize_t show_config_pending(struct vport *p, char *buf)
125 return sprintf(buf, "%d\n", 0);
127 static BRPORT_ATTR(config_pending, S_IRUGO, show_config_pending, NULL);
129 static ssize_t show_port_state(struct vport *p, char *buf)
131 return sprintf(buf, "%d\n", 0);
133 static BRPORT_ATTR(state, S_IRUGO, show_port_state, NULL);
135 static ssize_t show_message_age_timer(struct vport *p, char *buf)
137 return sprintf(buf, "%d\n", 0);
139 static BRPORT_ATTR(message_age_timer, S_IRUGO, show_message_age_timer, NULL);
141 static ssize_t show_forward_delay_timer(struct vport *p, char *buf)
143 return sprintf(buf, "%d\n", 0);
145 static BRPORT_ATTR(forward_delay_timer, S_IRUGO, show_forward_delay_timer, NULL);
147 static ssize_t show_hold_timer(struct vport *p, char *buf)
149 return sprintf(buf, "%d\n", 0);
151 static BRPORT_ATTR(hold_timer, S_IRUGO, show_hold_timer, NULL);
153 static struct brport_attribute *brport_attrs[] = {
154 &brport_attr_path_cost,
155 &brport_attr_priority,
156 &brport_attr_port_id,
157 &brport_attr_port_no,
158 &brport_attr_designated_root,
159 &brport_attr_designated_bridge,
160 &brport_attr_designated_port,
161 &brport_attr_designated_cost,
163 &brport_attr_change_ack,
164 &brport_attr_config_pending,
165 &brport_attr_message_age_timer,
166 &brport_attr_forward_delay_timer,
167 &brport_attr_hold_timer,
171 #define to_vport_attr(_at) container_of(_at, struct brport_attribute, attr)
172 #define to_vport(obj) container_of(obj, struct vport, kobj)
174 static ssize_t brport_show(struct kobject *kobj,
175 struct attribute *attr, char *buf)
177 struct brport_attribute *brport_attr = to_vport_attr(attr);
178 struct vport *p = to_vport(kobj);
180 return brport_attr->show(p, buf);
183 static ssize_t brport_store(struct kobject *kobj,
184 struct attribute *attr,
185 const char *buf, size_t count)
187 struct vport *p = to_vport(kobj);
188 ssize_t ret = -EINVAL;
190 if (!capable(CAP_NET_ADMIN))
193 pr_warning("%s: xxx writing port parms not supported yet!\n",
199 struct sysfs_ops ovs_brport_sysfs_ops = {
201 .store = brport_store,
205 * Add sysfs entries to ethernet device added to a bridge.
206 * Creates a brport subdirectory with bridge attributes.
207 * Puts symlink in bridge's brport subdirectory
209 int ovs_dp_sysfs_add_if(struct vport *p)
211 struct datapath *dp = p->dp;
212 struct vport *local_port = ovs_vport_rtnl(dp, OVSP_LOCAL);
213 struct brport_attribute **a;
216 /* Create /sys/class/net/<devname>/brport directory. */
217 if (!p->ops->get_kobj)
221 /* Due to bug in 2.6.32 kernel, sysfs_create_group() could panic
222 * in other namespace than init_net. Following check is to avoid it. */
228 err = kobject_add(&p->kobj, p->ops->get_kobj(p),
229 SYSFS_BRIDGE_PORT_ATTR);
233 /* Create symlink from /sys/class/net/<devname>/brport/bridge to
234 * /sys/class/net/<bridgename>. */
235 err = sysfs_create_link(&p->kobj, local_port->ops->get_kobj(local_port),
236 SYSFS_BRIDGE_PORT_LINK); /* "bridge" */
240 /* Populate /sys/class/net/<devname>/brport directory with files. */
241 for (a = brport_attrs; *a; ++a) {
242 err = sysfs_create_file(&p->kobj, &((*a)->attr));
247 /* Create symlink from /sys/class/net/<bridgename>/brif/<devname> to
248 * /sys/class/net/<devname>/brport. */
249 err = sysfs_create_link(&dp->ifobj, &p->kobj, p->ops->get_name(p));
252 strcpy(p->linkname, p->ops->get_name(p));
254 kobject_uevent(&p->kobj, KOBJ_ADD);
259 kobject_del(&p->kobj);
265 int ovs_dp_sysfs_del_if(struct vport *p)
267 if (p->linkname[0]) {
268 sysfs_remove_link(&p->dp->ifobj, p->linkname);
269 kobject_uevent(&p->kobj, KOBJ_REMOVE);
270 kobject_del(&p->kobj);
271 p->linkname[0] = '\0';
275 #endif /* CONFIG_SYSFS */