/*
- * Distributed under the terms of the GNU GPL version 2.
* Copyright (c) 2007, 2008, 2009 Nicira Networks.
+ * Distributed under the terms of the GNU GPL version 2.
+ *
+ * Significant portions of this file may be copied from parts of the Linux
+ * kernel, by Linus Torvalds and others.
*/
/* Functions for managing the dp interface/device. */
int (*dp_ioctl_hook)(struct net_device *dev, struct ifreq *rq, int cmd);
EXPORT_SYMBOL(dp_ioctl_hook);
-int (*dp_add_dp_hook)(struct datapath *dp);
-EXPORT_SYMBOL(dp_add_dp_hook);
-
-int (*dp_del_dp_hook)(struct datapath *dp);
-EXPORT_SYMBOL(dp_del_dp_hook);
-
-int (*dp_add_if_hook)(struct net_bridge_port *p);
-EXPORT_SYMBOL(dp_add_if_hook);
-
-int (*dp_del_if_hook)(struct net_bridge_port *p);
-EXPORT_SYMBOL(dp_del_if_hook);
-
/* Datapaths. Protected on the read side by rcu_read_lock, on the write side
* by dp_mutex. dp_mutex is almost completely redundant with genl_mutex
* maintained by the Generic Netlink code, but the timeout path needs mutual
rtnl_set_sk_err(net, RTNLGRP_LINK, err);
}
+static void release_dp(struct kobject *kobj)
+{
+ struct datapath *dp = container_of(kobj, struct datapath, ifobj);
+ kfree(dp);
+}
+
+struct kobj_type dp_ktype = {
+ .release = release_dp
+};
+
static int create_dp(int dp_idx, const char __user *devnamep)
{
struct net_device *dp_dev;
dp = kzalloc(sizeof *dp, GFP_KERNEL);
if (dp == NULL)
goto err_put_module;
-
+ INIT_LIST_HEAD(&dp->port_list);
mutex_init(&dp->mutex);
dp->dp_idx = dp_idx;
for (i = 0; i < DP_N_QUEUES; i++)
skb_queue_head_init(&dp->queues[i]);
init_waitqueue_head(&dp->waitqueue);
- /* Setup our datapath device */
- dp_dev = dp_dev_create(dp, devname, ODPP_LOCAL);
- err = PTR_ERR(dp_dev);
- if (IS_ERR(dp_dev))
- goto err_free_dp;
+ /* Initialize kobject for bridge. This will be added as
+ * /sys/class/net/<devname>/brif later, if sysfs is enabled. */
+ kobject_set_name(&dp->ifobj, SYSFS_BRIDGE_PORT_SUBDIR); /* "brif" */
+ dp->ifobj.kset = NULL;
+ dp->ifobj.parent = NULL;
+ kobject_init(&dp->ifobj, &dp_ktype);
+ /* Allocate table. */
err = -ENOMEM;
rcu_assign_pointer(dp->table, dp_table_create(DP_L1_SIZE));
if (!dp->table)
- goto err_destroy_dp_dev;
- INIT_LIST_HEAD(&dp->port_list);
+ goto err_free_dp;
+
+ /* Setup our datapath device */
+ dp_dev = dp_dev_create(dp, devname, ODPP_LOCAL);
+ err = PTR_ERR(dp_dev);
+ if (IS_ERR(dp_dev))
+ goto err_destroy_table;
err = new_nbp(dp, dp_dev, ODPP_LOCAL);
- if (err)
+ if (err) {
+ dp_dev_destroy(dp_dev);
goto err_destroy_table;
+ }
dp->drop_frags = 0;
dp->stats_percpu = alloc_percpu(struct dp_stats_percpu);
mutex_unlock(&dp_mutex);
rtnl_unlock();
- if (dp_add_dp_hook)
- dp_add_dp_hook(dp);
+#ifdef SUPPORT_SYSFS
+ dp_sysfs_add_dp(dp);
+#endif
return 0;
err_destroy_local_port:
- dp_del_port(dp->ports[ODPP_LOCAL], NULL);
+ dp_del_port(dp->ports[ODPP_LOCAL]);
err_destroy_table:
dp_table_destroy(dp->table, 0);
-err_destroy_dp_dev:
- dp_dev_destroy(dp_dev);
err_free_dp:
kfree(dp);
err_put_module:
return err;
}
-static void do_destroy_dp(struct datapath *dp, struct list_head *dp_devs)
+static void do_destroy_dp(struct datapath *dp)
{
struct net_bridge_port *p, *n;
int i;
- if (dp_del_dp_hook)
- dp_del_dp_hook(dp);
-
- /* Drop references to DP. */
list_for_each_entry_safe (p, n, &dp->port_list, node)
- dp_del_port(p, dp_devs);
+ if (p->port_no != ODPP_LOCAL)
+ dp_del_port(p);
+
+#ifdef SUPPORT_SYSFS
+ dp_sysfs_del_dp(dp);
+#endif
rcu_assign_pointer(dps[dp->dp_idx], NULL);
- synchronize_rcu();
- /* Wait until no longer in use, then destroy it. */
- synchronize_rcu();
+ dp_del_port(dp->ports[ODPP_LOCAL]);
+
dp_table_destroy(dp->table, 1);
+
for (i = 0; i < DP_N_QUEUES; i++)
skb_queue_purge(&dp->queues[i]);
for (i = 0; i < DP_MAX_GROUPS; i++)
kfree(dp->groups[i]);
free_percpu(dp->stats_percpu);
- kfree(dp);
+ kobject_put(&dp->ifobj);
module_put(THIS_MODULE);
}
static int destroy_dp(int dp_idx)
{
- struct dp_dev *dp_dev, *next;
struct datapath *dp;
- LIST_HEAD(dp_devs);
int err;
rtnl_lock();
if (!dp)
goto err_unlock;
- do_destroy_dp(dp, &dp_devs);
+ do_destroy_dp(dp);
err = 0;
err_unlock:
mutex_unlock(&dp_mutex);
rtnl_unlock();
- list_for_each_entry_safe (dp_dev, next, &dp_devs, list)
- free_netdev(dp_dev->dev);
return err;
}
+static void release_nbp(struct kobject *kobj)
+{
+ struct net_bridge_port *p = container_of(kobj, struct net_bridge_port, kobj);
+ kfree(p);
+}
+
+struct kobj_type brport_ktype = {
+#ifdef SUPPORT_SYSFS
+ .sysfs_ops = &brport_sysfs_ops,
+#endif
+ .release = release_nbp
+};
+
/* Called with RTNL lock and dp_mutex. */
static int new_nbp(struct datapath *dp, struct net_device *dev, int port_no)
{
list_add_rcu(&p->node, &dp->port_list);
dp->n_ports++;
+ /* Initialize kobject for bridge. This will be added as
+ * /sys/class/net/<devname>/brport later, if sysfs is enabled. */
+ kobject_set_name(&p->kobj, SYSFS_BRIDGE_PORT_ATTR); /* "brport" */
+ p->kobj.kset = NULL;
+ p->kobj.parent = &p->dev->NETDEV_DEV_MEMBER.kobj;
+ kobject_init(&p->kobj, &brport_ktype);
+
dp_ifinfo_notify(RTM_NEWLINK, p);
return 0;
if (err)
goto out_put;
- if (dp_add_if_hook)
- dp_add_if_hook(dp->ports[port_no]);
+#ifdef SUPPORT_SYSFS
+ dp_sysfs_add_if(dp->ports[port_no]);
+#endif
out_put:
dev_put(dev);
return err;
}
-int dp_del_port(struct net_bridge_port *p, struct list_head *dp_devs)
+int dp_del_port(struct net_bridge_port *p)
{
ASSERT_RTNL();
#ifdef SUPPORT_SYSFS
- if (p->port_no != ODPP_LOCAL && dp_del_if_hook)
- sysfs_remove_link(&p->dp->ifobj, p->dev->name);
+ if (p->port_no != ODPP_LOCAL)
+ dp_sysfs_del_if(p);
#endif
dp_ifinfo_notify(RTM_DELLINK, p);
/* Then wait until no one is still using it, and destroy it. */
synchronize_rcu();
- if (is_dp_dev(p->dev)) {
+ if (is_dp_dev(p->dev))
dp_dev_destroy(p->dev);
- if (dp_devs) {
- struct dp_dev *dp_dev = dp_dev_priv(p->dev);
- list_add(&dp_dev->list, dp_devs);
- }
- }
- if (p->port_no != ODPP_LOCAL && dp_del_if_hook) {
- dp_del_if_hook(p);
- } else {
- dev_put(p->dev);
- kfree(p);
- }
+ dev_put(p->dev);
+ kobject_put(&p->kobj);
return 0;
}
static int del_port(int dp_idx, int port_no)
{
- struct dp_dev *dp_dev, *next;
struct net_bridge_port *p;
struct datapath *dp;
LIST_HEAD(dp_devs);
if (!p)
goto out_unlock_dp;
- err = dp_del_port(p, &dp_devs);
+ err = dp_del_port(p);
out_unlock_dp:
mutex_unlock(&dp->mutex);
out_unlock_rtnl:
rtnl_unlock();
out:
- list_for_each_entry_safe (dp_dev, next, &dp_devs, list)
- free_netdev(dp_dev->dev);
return err;
}
struct sw_flow *flow;
WARN_ON_ONCE(skb_shared(skb));
- WARN_ON_ONCE(skb->destructor);
/* BHs are off so we don't have to use get_cpu()/put_cpu() here. */
stats = percpu_ptr(dp->stats_percpu, smp_processor_id());
break;
case ODPAT_SET_VLAN_PCP:
- if (a->vlan_pcp.vlan_pcp & ~VLAN_PCP_MASK)
+ if (a->vlan_pcp.vlan_pcp
+ & ~(VLAN_PCP_MASK >> VLAN_PCP_SHIFT))
return -EINVAL;
break;
static int put_flow(struct datapath *dp, struct odp_flow_put __user *ufp)
{
struct odp_flow_put uf;
- struct sw_flow *flow, **bucket;
+ struct sw_flow *flow;
struct dp_table *table;
struct odp_flow_stats stats;
int error;
goto error;
uf.flow.key.reserved = 0;
-retry:
table = rcu_dereference(dp->table);
- bucket = dp_table_lookup_for_insert(table, &uf.flow.key);
- if (!bucket) {
- /* No such flow, and the slots where it could go are full. */
- error = uf.flags & ODPPF_CREATE ? -EXFULL : -ENOENT;
- goto error;
- } else if (!*bucket) {
- /* No such flow, but we found an available slot for it. */
+ flow = dp_table_lookup(table, &uf.flow.key);
+ if (!flow) {
+ /* No such flow. */
struct sw_flow_actions *acts;
error = -ENOENT;
goto error;
/* Expand table, if necessary, to make room. */
- if (dp->n_flows * 4 >= table->n_buckets &&
- table->n_buckets < DP_MAX_BUCKETS) {
+ if (dp->n_flows >= table->n_buckets) {
+ error = -ENOSPC;
+ if (table->n_buckets >= DP_MAX_BUCKETS)
+ goto error;
+
error = dp_table_expand(dp);
if (error)
goto error;
-
- /* The bucket's location has changed. Try again. */
- goto retry;
+ table = rcu_dereference(dp->table);
}
/* Allocate flow. */
rcu_assign_pointer(flow->sf_acts, acts);
/* Put flow in bucket. */
- rcu_assign_pointer(*bucket, flow);
+ error = dp_table_insert(table, flow);
+ if (error)
+ goto error_free_flow_acts;
dp->n_flows++;
memset(&stats, 0, sizeof(struct odp_flow_stats));
} else {
/* We found a matching flow. */
- struct sw_flow *flow = *rcu_dereference(bucket);
struct sw_flow_actions *old_acts, *new_acts;
unsigned long int flags;
return -EFAULT;
return 0;
+error_free_flow_acts:
+ kfree(flow->sf_acts);
error_free_flow:
kmem_cache_free(flow_cache, flow);
error:
struct odp_flow_key key;
struct sk_buff *skb;
struct sw_flow_actions *actions;
+ struct ethhdr *eth;
int err;
err = -EFAULT;
execute.length))
goto error_free_skb;
+ skb_reset_mac_header(skb);
+ eth = eth_hdr(skb);
+
+ /* Normally, setting the skb 'protocol' field would be handled by a
+ * call to eth_type_trans(), but it assumes there's a sending
+ * device, which we may not have. */
+ if (ntohs(eth->h_proto) >= 1536)
+ skb->protocol = eth->h_proto;
+ else
+ skb->protocol = htons(ETH_P_802_2);
+
flow_extract(skb, execute.in_port, &key);
err = execute_actions(dp, skb, &key, actions->actions,
actions->n_actions, GFP_KERNEL);
int i;
stats.n_flows = dp->n_flows;
- stats.cur_capacity = rcu_dereference(dp->table)->n_buckets * 2;
- stats.max_capacity = DP_MAX_BUCKETS * 2;
+ stats.cur_capacity = rcu_dereference(dp->table)->n_buckets;
+ stats.max_capacity = DP_MAX_BUCKETS;
stats.n_ports = dp->n_ports;
stats.max_ports = DP_MAX_PORTS;
stats.max_groups = DP_MAX_GROUPS;
return copy_to_user(statsp, &stats, sizeof stats) ? -EFAULT : 0;
}
+/* MTU of the dp pseudo-device: ETH_DATA_LEN or the minimum of the ports */
+int dp_min_mtu(const struct datapath *dp)
+{
+ struct net_bridge_port *p;
+ int mtu = 0;
+
+ ASSERT_RTNL();
+
+ list_for_each_entry_rcu (p, &dp->port_list, node) {
+ struct net_device *dev = p->dev;
+
+ /* Skip any internal ports, since that's what we're trying to
+ * set. */
+ if (is_dp_dev(dev))
+ continue;
+
+ if (!mtu || dev->mtu < mtu)
+ mtu = dev->mtu;
+ }
+
+ return mtu ? mtu : ETH_DATA_LEN;
+}
+
static int
put_port(const struct net_bridge_port *p, struct odp_port __user *uop)
{
return 0;
}
+static int get_listen_mask(const struct file *f)
+{
+ return (long)f->private_data;
+}
+
+static void set_listen_mask(struct file *f, int listen_mask)
+{
+ f->private_data = (void*)(long)listen_mask;
+}
+
static long openvswitch_ioctl(struct file *f, unsigned int cmd,
unsigned long argp)
{
break;
case ODP_GET_LISTEN_MASK:
- err = put_user((int)f->private_data, (int __user *)argp);
+ err = put_user(get_listen_mask(f), (int __user *)argp);
break;
case ODP_SET_LISTEN_MASK:
if (listeners & ~ODPL_ALL)
break;
err = 0;
- f->private_data = (void*)listeners;
+ set_listen_mask(f, listeners);
break;
case ODP_PORT_QUERY:
ssize_t openvswitch_read(struct file *f, char __user *buf, size_t nbytes,
loff_t *ppos)
{
- int listeners = (int) f->private_data;
+ /* XXX is there sufficient synchronization here? */
+ int listeners = get_listen_mask(f);
int dp_idx = iminor(f->f_dentry->d_inode);
struct datapath *dp = get_dp(dp_idx);
struct sk_buff *skb;
}
}
success:
- copy_bytes = min(skb->len, nbytes);
+ copy_bytes = min_t(size_t, skb->len, nbytes);
iov.iov_base = buf;
iov.iov_len = copy_bytes;
retval = skb_copy_datagram_iovec(skb, 0, &iov, iov.iov_len);
static unsigned int openvswitch_poll(struct file *file, poll_table *wait)
{
+ /* XXX is there sufficient synchronization here? */
int dp_idx = iminor(file->f_dentry->d_inode);
struct datapath *dp = get_dp(dp_idx);
unsigned int mask;
if (dp) {
mask = 0;
poll_wait(file, &dp->waitqueue, wait);
- if (dp_has_packet_of_interest(dp, (int)file->private_data))
+ if (dp_has_packet_of_interest(dp, get_listen_mask(file)))
mask |= POLLIN | POLLRDNORM;
} else {
mask = POLLIN | POLLRDNORM | POLLHUP;
projects / openvswitch / blobdiff