#include <linux/random.h>
#include <asm/system.h>
#include <linux/netfilter_bridge.h>
+#include <linux/netfilter_ipv4.h>
#include <linux/inetdevice.h>
#include <linux/list.h>
+#include <linux/rculist.h>
+#include <linux/workqueue.h>
+#include <linux/dmi.h>
-#include "openflow-netlink.h"
+#include "openflow/nicira-ext.h"
+#include "openflow/openflow-netlink.h"
#include "datapath.h"
+#include "nx_act_snat.h"
#include "table.h"
#include "chain.h"
+#include "dp_dev.h"
#include "forward.h"
#include "flow.h"
-#include "datapath_t.h"
#include "compat.h"
+/* Strings to describe the manufacturer, hardware, and software. This data
+ * is queriable through the switch description stats message. */
+static char mfr_desc[DESC_STR_LEN] = "Nicira Networks, Inc.";
+static char hw_desc[DESC_STR_LEN] = "Reference Linux Kernel Module";
+static char sw_desc[DESC_STR_LEN] = VERSION BUILDNR;
+static char serial_num[SERIAL_NUM_LEN] = "None";
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
+module_param_string(mfr_desc, mfr_desc, sizeof mfr_desc, 0444);
+module_param_string(hw_desc, hw_desc, sizeof hw_desc, 0444);
+module_param_string(sw_desc, sw_desc, sizeof sw_desc, 0444);
+module_param_string(serial_num, serial_num, sizeof serial_num, 0444);
+#else
+MODULE_PARM(mfr_desc, "s");
+MODULE_PARM(hw_desc, "s");
+MODULE_PARM(sw_desc, "s");
+MODULE_PARM(serial_num, "s");
+#endif
+
+
/* Number of milliseconds between runs of the maintenance thread. */
#define MAINT_SLEEP_MSECS 1000
-#define BRIDGE_PORT_NO_FLOOD 0x00000001
-
#define UINT32_MAX 4294967295U
+#define UINT16_MAX 65535
#define MAX(X, Y) ((X) > (Y) ? (X) : (Y))
-struct net_bridge_port {
- u16 port_no;
- u32 flags;
- struct datapath *dp;
- struct net_device *dev;
- struct list_head node; /* Element in datapath.ports. */
-};
-
static struct genl_family dp_genl_family;
static struct genl_multicast_group mc_group;
-int dp_dev_setup(struct net_device *dev);
-
/* It's hard to imagine wanting more than one datapath, but... */
#define DP_MAX 32
-/* datapaths. Protected on the read side by rcu_read_lock, on the write side
- * by dp_mutex.
+/* 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
+ * exclusion too.
*
* It is safe to access the datapath and net_bridge_port structures with just
- * the dp_mutex, but to access the chain you need to take the rcu_read_lock
- * also (because dp_mutex doesn't prevent flows from being destroyed).
+ * dp_mutex.
*/
static struct datapath *dps[DP_MAX];
-static DEFINE_MUTEX(dp_mutex);
+DEFINE_MUTEX(dp_mutex);
+EXPORT_SYMBOL(dp_mutex);
static int dp_maint_func(void *data);
-static int send_port_status(struct net_bridge_port *p, uint8_t status);
-
+static void init_port_status(struct net_bridge_port *p);
+static int dp_genl_openflow_done(struct netlink_callback *);
+static struct net_bridge_port *new_nbp(struct datapath *,
+ struct net_device *, int port_no);
-/* nla_unreserve - reduce amount of space reserved by nla_reserve
+/* nla_shrink - reduce amount of space reserved by nla_reserve
* @skb: socket buffer from which to recover room
* @nla: netlink attribute to adjust
- * @len: amount by which to reduce attribute payload
+ * @len: new length of attribute payload
*
* Reduces amount of space reserved by a call to nla_reserve.
*
* No other attributes may be added between calling nla_reserve and this
* function, since it will create a hole in the message.
*/
-void nla_unreserve(struct sk_buff *skb, struct nlattr *nla, int len)
+void nla_shrink(struct sk_buff *skb, struct nlattr *nla, int len)
{
- skb->tail -= len;
- skb->len -= len;
-
- nla->nla_len -= len;
+ int delta = nla_total_size(len) - nla_total_size(nla_len(nla));
+ BUG_ON(delta > 0);
+ skb->tail += delta;
+ skb->len += delta;
+ nla->nla_len = nla_attr_size(len);
}
+/* Puts a set of openflow headers for a message of the given 'type' into 'skb'.
+ * If 'sender' is nonnull, then it is used as the message's destination. 'dp'
+ * must specify the datapath to use.
+ *
+ * '*max_openflow_len' receives the maximum number of bytes that are available
+ * for the embedded OpenFlow message. The caller must call
+ * resize_openflow_skb() to set the actual size of the message to this number
+ * of bytes or less.
+ *
+ * Returns the openflow header if successful, otherwise (if 'skb' is too small)
+ * an error code. */
static void *
-alloc_openflow_skb(struct datapath *dp, size_t openflow_len, uint8_t type,
- const struct sender *sender, struct sk_buff **pskb)
+put_openflow_headers(struct datapath *dp, struct sk_buff *skb, uint8_t type,
+ const struct sender *sender, int *max_openflow_len)
{
- size_t genl_len;
- struct sk_buff *skb;
- struct nlattr *attr;
struct ofp_header *oh;
-
- genl_len = nla_total_size(sizeof(uint32_t)); /* DP_GENL_A_DP_IDX */
- genl_len += nla_total_size(openflow_len); /* DP_GENL_A_OPENFLOW */
- skb = *pskb = genlmsg_new(genl_len, GFP_ATOMIC);
- if (!skb) {
- if (net_ratelimit())
- printk("alloc_openflow_skb: genlmsg_new failed\n");
- return NULL;
- }
+ struct nlattr *attr;
+ int openflow_len;
/* Assemble the Generic Netlink wrapper. */
if (!genlmsg_put(skb,
sender ? sender->pid : 0,
sender ? sender->seq : 0,
&dp_genl_family, 0, DP_GENL_C_OPENFLOW))
- BUG();
+ return ERR_PTR(-ENOBUFS);
if (nla_put_u32(skb, DP_GENL_A_DP_IDX, dp->dp_idx) < 0)
- BUG();
+ return ERR_PTR(-ENOBUFS);
+ openflow_len = (skb_tailroom(skb) - NLA_HDRLEN) & ~(NLA_ALIGNTO - 1);
+ if (openflow_len < sizeof *oh)
+ return ERR_PTR(-ENOBUFS);
+ *max_openflow_len = openflow_len;
attr = nla_reserve(skb, DP_GENL_A_OPENFLOW, openflow_len);
BUG_ON(!attr);
- nlmsg_end(skb, (struct nlmsghdr *) skb->data);
- /* Fill in the header. */
+ /* Fill in the header. The caller is responsible for the length. */
oh = nla_data(attr);
oh->version = OFP_VERSION;
oh->type = type;
- oh->length = htons(openflow_len);
oh->xid = sender ? sender->xid : 0;
return oh;
}
+/* Resizes OpenFlow header 'oh', which must be at the tail end of 'skb', to new
+ * length 'new_length' (in bytes), adjusting pointers and size values as
+ * necessary. */
static void
resize_openflow_skb(struct sk_buff *skb,
struct ofp_header *oh, size_t new_length)
{
- struct nlattr *attr;
-
- BUG_ON(new_length > ntohs(oh->length));
- attr = ((void *) oh) - NLA_HDRLEN;
- nla_unreserve(skb, attr, ntohs(oh->length) - new_length);
+ struct nlattr *attr = ((void *) oh) - NLA_HDRLEN;
+ nla_shrink(skb, attr, new_length);
oh->length = htons(new_length);
nlmsg_end(skb, (struct nlmsghdr *) skb->data);
}
+/* Allocates a new skb to contain an OpenFlow message 'openflow_len' bytes in
+ * length. Returns a null pointer if memory is unavailable, otherwise returns
+ * the OpenFlow header and stores a pointer to the skb in '*pskb'.
+ *
+ * 'type' is the OpenFlow message type. If 'sender' is nonnull, then it is
+ * used as the message's destination. 'dp' must specify the datapath to
+ * use. */
+static void *
+alloc_openflow_skb(struct datapath *dp, size_t openflow_len, uint8_t type,
+ const struct sender *sender, struct sk_buff **pskb)
+{
+ struct ofp_header *oh;
+ size_t genl_len;
+ struct sk_buff *skb;
+ int max_openflow_len;
+
+ if ((openflow_len + sizeof(struct ofp_header)) > UINT16_MAX) {
+ if (net_ratelimit())
+ printk("alloc_openflow_skb: openflow message too large: %zu\n",
+ openflow_len);
+ return NULL;
+ }
+
+ genl_len = nlmsg_total_size(GENL_HDRLEN + dp_genl_family.hdrsize);
+ genl_len += nla_total_size(sizeof(uint32_t)); /* DP_GENL_A_DP_IDX */
+ genl_len += nla_total_size(openflow_len); /* DP_GENL_A_OPENFLOW */
+ skb = *pskb = genlmsg_new(genl_len, GFP_ATOMIC);
+ if (!skb) {
+ if (net_ratelimit())
+ printk("alloc_openflow_skb: genlmsg_new failed\n");
+ return NULL;
+ }
+
+ oh = put_openflow_headers(dp, skb, type, sender, &max_openflow_len);
+ BUG_ON(!oh || IS_ERR(oh));
+ resize_openflow_skb(skb, oh, openflow_len);
+
+ return oh;
+}
+
+/* Sends 'skb' to 'sender' if it is nonnull, otherwise multicasts 'skb' to all
+ * listeners. */
static int
send_openflow_skb(struct sk_buff *skb, const struct sender *sender)
{
- int err = (sender
- ? genlmsg_unicast(skb, sender->pid)
- : genlmsg_multicast(skb, 0, mc_group.id, GFP_ATOMIC));
- if (err && net_ratelimit())
- printk(KERN_WARNING "send_openflow_skb: send failed: %d\n",
- err);
- return err;
+ return (sender
+ ? genlmsg_unicast(skb, sender->pid)
+ : genlmsg_multicast(skb, 0, mc_group.id, GFP_ATOMIC));
}
-/* Generates a unique datapath id. It incorporates the datapath index
- * and a hardware address, if available. If not, it generates a random
- * one.
- */
+/* Retrieves the datapath id, which is the MAC address of the "of" device. */
static
-uint64_t gen_datapath_id(uint16_t dp_idx)
+uint64_t get_datapath_id(struct net_device *dev)
{
- uint64_t id;
+ uint64_t id = 0;
int i;
- struct net_device *dev;
-
- /* The top 16 bits are used to identify the datapath. The lower 48 bits
- * use an interface address. */
- id = (uint64_t)dp_idx << 48;
- if ((dev = dev_get_by_name(&init_net, "ctl0"))
- || (dev = dev_get_by_name(&init_net, "eth0"))) {
- for (i=0; i<ETH_ALEN; i++) {
- id |= (uint64_t)dev->dev_addr[i] << (8*(ETH_ALEN-1 - i));
- }
- dev_put(dev);
- } else {
- /* Randomly choose the lower 48 bits if we cannot find an
- * address and mark the most significant bit to indicate that
- * this was randomly generated. */
- uint8_t rand[ETH_ALEN];
- get_random_bytes(rand, ETH_ALEN);
- id |= (uint64_t)1 << 63;
- for (i=0; i<ETH_ALEN; i++) {
- id |= (uint64_t)rand[i] << (8*(ETH_ALEN-1 - i));
- }
- }
+
+ for (i=0; i<ETH_ALEN; i++)
+ id |= (uint64_t)dev->dev_addr[i] << (8*(ETH_ALEN-1 - i));
return id;
}
/* Creates a new datapath numbered 'dp_idx'. Returns 0 for success or a
- * negative error code.
- *
- * Not called with any locks. */
+ * negative error code. */
static int new_dp(int dp_idx)
{
struct datapath *dp;
if (!try_module_get(THIS_MODULE))
return -ENODEV;
- mutex_lock(&dp_mutex);
- dp = rcu_dereference(dps[dp_idx]);
- if (dp != NULL) {
+ /* Exit early if a datapath with that number already exists. */
+ if (dps[dp_idx]) {
err = -EEXIST;
goto err_unlock;
}
if (dp == NULL)
goto err_unlock;
+ /* Setup our "of" device */
+ err = dp_dev_setup(dp);
+ if (err)
+ goto err_free_dp;
+
dp->dp_idx = dp_idx;
- dp->id = gen_datapath_id(dp_idx);
+ dp->id = get_datapath_id(dp->netdev);
dp->chain = chain_create(dp);
if (dp->chain == NULL)
- goto err_free_dp;
+ goto err_destroy_dp_dev;
INIT_LIST_HEAD(&dp->port_list);
-#if 0
- /* Setup our "of" device */
- dp->dev.priv = dp;
- rtnl_lock();
- err = dp_dev_setup(&dp->dev);
- rtnl_unlock();
- if (err != 0)
- printk("datapath: problem setting up 'of' device\n");
-#endif
+ dp->local_port = new_nbp(dp, dp->netdev, OFPP_LOCAL);
+ if (IS_ERR(dp->local_port)) {
+ err = PTR_ERR(dp->local_port);
+ goto err_destroy_local_port;
+ }
- dp->config.flags = 0;
- dp->config.miss_send_len = htons(OFP_DEFAULT_MISS_SEND_LEN);
+ dp->flags = 0;
+ dp->miss_send_len = OFP_DEFAULT_MISS_SEND_LEN;
dp->dp_task = kthread_run(dp_maint_func, dp, "dp%d", dp_idx);
if (IS_ERR(dp->dp_task))
- goto err_free_dp;
+ goto err_destroy_chain;
- rcu_assign_pointer(dps[dp_idx], dp);
- mutex_unlock(&dp_mutex);
+ dps[dp_idx] = dp;
return 0;
+err_destroy_local_port:
+ dp_del_switch_port(dp->local_port);
+err_destroy_chain:
+ chain_destroy(dp->chain);
+err_destroy_dp_dev:
+ dp_dev_destroy(dp);
err_free_dp:
kfree(dp);
err_unlock:
- mutex_unlock(&dp_mutex);
module_put(THIS_MODULE);
return err;
}
-/* Find and return a free port number under 'dp'. Called under dp_mutex. */
+/* Find and return a free port number under 'dp'. */
static int find_portno(struct datapath *dp)
{
int i;
- for (i = 0; i < OFPP_MAX; i++)
+ for (i = 0; i < DP_MAX_PORTS; i++)
if (dp->ports[i] == NULL)
return i;
return -EXFULL;
}
static struct net_bridge_port *new_nbp(struct datapath *dp,
- struct net_device *dev)
+ struct net_device *dev, int port_no)
{
struct net_bridge_port *p;
- int port_no;
- port_no = find_portno(dp);
- if (port_no < 0)
- return ERR_PTR(port_no);
+ if (dev->br_port != NULL)
+ return ERR_PTR(-EBUSY);
p = kzalloc(sizeof(*p), GFP_KERNEL);
if (p == NULL)
return ERR_PTR(-ENOMEM);
- p->dp = dp;
+ rtnl_lock();
+ dev_set_promiscuity(dev, 1);
+ rtnl_unlock();
dev_hold(dev);
+ p->dp = dp;
p->dev = dev;
p->port_no = port_no;
+ spin_lock_init(&p->lock);
+ INIT_WORK(&p->port_task, NULL);
+ if (port_no != OFPP_LOCAL)
+ rcu_assign_pointer(dev->br_port, p);
+ if (port_no < DP_MAX_PORTS)
+ rcu_assign_pointer(dp->ports[port_no], p);
+ list_add_rcu(&p->node, &dp->port_list);
return p;
}
-/* Called with dp_mutex. */
int add_switch_port(struct datapath *dp, struct net_device *dev)
{
struct net_bridge_port *p;
+ int port_no;
- if (dev->flags & IFF_LOOPBACK || dev->type != ARPHRD_ETHER)
+ if (dev->flags & IFF_LOOPBACK || dev->type != ARPHRD_ETHER
+ || is_dp_dev(dev))
return -EINVAL;
- if (dev->br_port != NULL)
- return -EBUSY;
+ port_no = find_portno(dp);
+ if (port_no < 0)
+ return port_no;
- p = new_nbp(dp, dev);
+ p = new_nbp(dp, dev, port_no);
if (IS_ERR(p))
return PTR_ERR(p);
- dev_hold(dev);
- rcu_assign_pointer(dev->br_port, p);
- rtnl_lock();
- dev_set_promiscuity(dev, 1);
- rtnl_unlock();
-
- rcu_assign_pointer(dp->ports[p->port_no], p);
- list_add_rcu(&p->node, &dp->port_list);
+ init_port_status(p);
/* Notify the ctlpath that this port has been added */
- send_port_status(p, OFPPR_ADD);
+ dp_send_port_status(p, OFPPR_ADD);
return 0;
}
-/* Delete 'p' from switch.
- * Called with dp_mutex. */
-static int del_switch_port(struct net_bridge_port *p)
+/* Delete 'p' from switch. */
+int dp_del_switch_port(struct net_bridge_port *p)
{
+#ifdef SUPPORT_SNAT
+ unsigned long flags;
+#endif
+
/* First drop references to device. */
+ cancel_work_sync(&p->port_task);
rtnl_lock();
dev_set_promiscuity(p->dev, -1);
rtnl_unlock();
list_del_rcu(&p->node);
- rcu_assign_pointer(p->dp->ports[p->port_no], NULL);
+ if (p->port_no != OFPP_LOCAL)
+ rcu_assign_pointer(p->dp->ports[p->port_no], NULL);
rcu_assign_pointer(p->dev->br_port, NULL);
/* Then wait until no one is still using it, and destroy it. */
synchronize_rcu();
+#ifdef SUPPORT_SNAT
+ /* Free any SNAT configuration on the port. */
+ spin_lock_irqsave(&p->lock, flags);
+ snat_free_conf(p);
+ spin_unlock_irqrestore(&p->lock, flags);
+#endif
+
/* Notify the ctlpath that this port no longer exists */
- send_port_status(p, OFPPR_DELETE);
+ dp_send_port_status(p, OFPPR_DELETE);
dev_put(p->dev);
kfree(p);
return 0;
}
-/* Called with dp_mutex. */
static void del_dp(struct datapath *dp)
{
struct net_bridge_port *p, *n;
-#if 0
- /* Unregister the "of" device of this dp */
- rtnl_lock();
- unregister_netdevice(&dp->dev);
- rtnl_unlock();
-#endif
-
kthread_stop(dp->dp_task);
/* Drop references to DP. */
list_for_each_entry_safe (p, n, &dp->port_list, node)
- del_switch_port(p);
+ dp_del_switch_port(p);
rcu_assign_pointer(dps[dp->dp_idx], NULL);
+ /* Kill off local_port dev references from buffered packets that have
+ * associated dst entries. */
+ synchronize_rcu();
+ fwd_discard_all();
+
+ /* Destroy dp->netdev. (Must follow deleting switch ports since
+ * dp->local_port has a reference to it.) */
+ dp_dev_destroy(dp);
+
/* Wait until no longer in use, then destroy it. */
synchronize_rcu();
chain_destroy(dp->chain);
struct datapath *dp = (struct datapath *) data;
while (!kthread_should_stop()) {
-#if 1
- chain_timeout(dp->chain);
-#else
- int count = chain_timeout(dp->chain);
- chain_print_stats(dp->chain);
- if (count)
- printk("%d flows timed out\n", count);
+#ifdef SUPPORT_SNAT
+ struct net_bridge_port *p;
+
+ /* Expire old SNAT entries */
+ rcu_read_lock();
+ list_for_each_entry_rcu (p, &dp->port_list, node)
+ snat_maint(p);
+ rcu_read_unlock();
#endif
+
+ /* Timeout old entries */
+ chain_timeout(dp->chain);
msleep_interruptible(MAINT_SLEEP_MSECS);
}
return 0;
}
+static void
+do_port_input(struct net_bridge_port *p, struct sk_buff *skb)
+{
+ /* Make our own copy of the packet. Otherwise we will mangle the
+ * packet for anyone who came before us (e.g. tcpdump via AF_PACKET).
+ * (No one comes after us, since we tell handle_bridge() that we took
+ * the packet.) */
+ skb = skb_share_check(skb, GFP_ATOMIC);
+ if (!skb)
+ return;
+
+#ifdef SUPPORT_SNAT
+ /* Check if this packet needs early SNAT processing. */
+ if (snat_pre_route(skb)) {
+ kfree_skb(skb);
+ return;
+ }
+#endif
+
+ /* Push the Ethernet header back on. */
+ skb_push(skb, ETH_HLEN);
+ skb_reset_mac_header(skb);
+ fwd_port_input(p->dp->chain, skb, p);
+}
+
/*
* Used as br_handle_frame_hook. (Cannot run bridge at the same time, even on
- * different set of devices!) Returns 0 if *pskb should be processed further,
- * 1 if *pskb is handled. */
+ * different set of devices!)
+ */
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,22)
/* Called with rcu_read_lock. */
static struct sk_buff *dp_frame_hook(struct net_bridge_port *p,
struct sk_buff *skb)
{
- struct ethhdr *eh = eth_hdr(skb);
- struct sk_buff *skb_local = NULL;
-
-
- if (compare_ether_addr(eh->h_dest, skb->dev->dev_addr) == 0)
- return skb;
-
- if (is_broadcast_ether_addr(eh->h_dest)
- || is_multicast_ether_addr(eh->h_dest)
- || is_local_ether_addr(eh->h_dest))
- skb_local = skb_clone(skb, GFP_ATOMIC);
-
- /* Push the Ethernet header back on. */
- if (skb->protocol == htons(ETH_P_8021Q))
- skb_push(skb, VLAN_ETH_HLEN);
- else
- skb_push(skb, ETH_HLEN);
-
- fwd_port_input(p->dp->chain, skb, p->port_no);
-
- return skb_local;
+ do_port_input(p, skb);
+ return NULL;
}
#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
static int dp_frame_hook(struct net_bridge_port *p, struct sk_buff **pskb)
{
- /* Push the Ethernet header back on. */
- if ((*pskb)->protocol == htons(ETH_P_8021Q))
- skb_push(*pskb, VLAN_ETH_HLEN);
- else
- skb_push(*pskb, ETH_HLEN);
-
- fwd_port_input(p->dp->chain, *pskb, p->port_no);
+ do_port_input(p, *pskb);
return 1;
}
-#else
+#else
/* NB: This has only been tested on 2.4.35 */
-
-/* Called without any locks (?) */
static void dp_frame_hook(struct sk_buff *skb)
{
struct net_bridge_port *p = skb->dev->br_port;
-
- /* Push the Ethernet header back on. */
- if (skb->protocol == htons(ETH_P_8021Q))
- skb_push(skb, VLAN_ETH_HLEN);
- else
- skb_push(skb, ETH_HLEN);
-
if (p) {
rcu_read_lock();
- fwd_port_input(p->dp->chain, skb, p->port_no);
+ do_port_input(p, skb);
rcu_read_unlock();
} else
kfree_skb(skb);
/* Forwarding output path.
* Based on net/bridge/br_forward.c. */
-/* Don't forward packets to originating port or with flooding disabled */
-static inline int should_deliver(const struct net_bridge_port *p,
- const struct sk_buff *skb)
-{
- if ((skb->dev == p->dev) || (p->flags & BRIDGE_PORT_NO_FLOOD)) {
- return 0;
- }
-
- return 1;
-}
-
static inline unsigned packet_length(const struct sk_buff *skb)
{
int length = skb->len - ETH_HLEN;
return length;
}
+/* Send packets out all the ports except the originating one. If the
+ * "flood" argument is set, only send along the minimum spanning tree.
+ */
static int
-flood(struct datapath *dp, struct sk_buff *skb)
+output_all(struct datapath *dp, struct sk_buff *skb, int flood)
{
+ u32 disable = flood ? OFPPC_NO_FLOOD : 0;
struct net_bridge_port *p;
- int prev_port;
+ int prev_port = -1;
- prev_port = -1;
list_for_each_entry_rcu (p, &dp->port_list, node) {
- if (!should_deliver(p, skb))
+ if (skb->dev == p->dev || p->config & disable)
continue;
if (prev_port != -1) {
struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
kfree_skb(skb);
return -ENOMEM;
}
- dp_output_port(dp, clone, prev_port);
+ dp_output_port(dp, clone, prev_port, 0);
}
prev_port = p->port_no;
}
if (prev_port != -1)
- dp_output_port(dp, skb, prev_port);
+ dp_output_port(dp, skb, prev_port, 0);
else
kfree_skb(skb);
/* Marks 'skb' as having originated from 'in_port' in 'dp'.
FIXME: how are devices reference counted? */
-int dp_set_origin(struct datapath *dp, uint16_t in_port,
+void dp_set_origin(struct datapath *dp, uint16_t in_port,
struct sk_buff *skb)
{
- if (in_port < OFPP_MAX && dp->ports[in_port]) {
- skb->dev = dp->ports[in_port]->dev;
- return 0;
+ struct net_bridge_port *p;
+ p = (in_port < DP_MAX_PORTS ? dp->ports[in_port]
+ : in_port == OFPP_LOCAL ? dp->local_port
+ : NULL);
+ if (p)
+ skb->dev = p->dev;
+ else
+ skb->dev = NULL;
+}
+
+int
+dp_xmit_skb(struct sk_buff *skb)
+{
+ int len = skb->len;
+ if (packet_length(skb) > skb->dev->mtu) {
+ printk("dropped over-mtu packet: %d > %d\n",
+ packet_length(skb), skb->dev->mtu);
+ kfree_skb(skb);
+ return -E2BIG;
}
- return -ENOENT;
+
+ dev_queue_xmit(skb);
+
+ return len;
}
/* Takes ownership of 'skb' and transmits it to 'out_port' on 'dp'.
*/
-int dp_output_port(struct datapath *dp, struct sk_buff *skb, int out_port)
+int dp_output_port(struct datapath *dp, struct sk_buff *skb, int out_port,
+ int ignore_no_fwd)
{
- struct net_bridge_port *p;
- int len = skb->len;
-
BUG_ON(!skb);
- if (out_port == OFPP_FLOOD)
- return flood(dp, skb);
- else if (out_port == OFPP_CONTROLLER)
+ switch (out_port){
+ case OFPP_IN_PORT:
+ /* Send it out the port it came in on, which is already set in
+ * the skb. */
+ if (!skb->dev) {
+ if (net_ratelimit())
+ printk("skb device not set forwarding to in_port\n");
+ kfree_skb(skb);
+ return -ESRCH;
+ }
+ return dp_xmit_skb(skb);
+
+ case OFPP_TABLE: {
+ int retval = run_flow_through_tables(dp->chain, skb,
+ skb->dev->br_port);
+ if (retval)
+ kfree_skb(skb);
+ return retval;
+ }
+
+ case OFPP_FLOOD:
+ return output_all(dp, skb, 1);
+
+ case OFPP_ALL:
+ return output_all(dp, skb, 0);
+
+ case OFPP_CONTROLLER:
return dp_output_control(dp, skb, fwd_save_skb(skb), 0,
OFPR_ACTION);
- else if (out_port == OFPP_TABLE) {
- struct sw_flow_key key;
- struct sw_flow *flow;
-
- flow_extract(skb, skb->dev->br_port->port_no, &key);
- flow = chain_lookup(dp->chain, &key);
- if (likely(flow != NULL)) {
- flow_used(flow, skb);
- execute_actions(dp, skb, &key, flow->actions, flow->n_actions);
+
+ case OFPP_LOCAL: {
+ struct net_device *dev = dp->netdev;
+#ifdef SUPPORT_SNAT
+ snat_local_in(skb);
+#endif
+ return dev ? dp_dev_recv(dev, skb) : -ESRCH;
+ }
+
+ case 0 ... DP_MAX_PORTS - 1: {
+ struct net_bridge_port *p = dp->ports[out_port];
+ if (p == NULL)
+ goto bad_port;
+ if (p->dev == skb->dev) {
+ /* To send to the input port, must use OFPP_IN_PORT */
+ kfree_skb(skb);
+ if (net_ratelimit())
+ printk("can't directly forward to input port\n");
+ return -EINVAL;
+ }
+ if (p->config & OFPPC_NO_FWD && !ignore_no_fwd) {
+ kfree_skb(skb);
return 0;
}
- return -ESRCH;
- } else if (out_port >= OFPP_MAX)
- goto bad_port;
+ skb->dev = p->dev;
+ return dp_xmit_skb(skb);
+ }
- p = dp->ports[out_port];
- if (p == NULL)
+ default:
goto bad_port;
-
- skb->dev = p->dev;
- if (packet_length(skb) > skb->dev->mtu) {
- printk("dropped over-mtu packet: %d > %d\n",
- packet_length(skb), skb->dev->mtu);
- kfree_skb(skb);
- return -E2BIG;
}
- dev_queue_xmit(skb);
-
- return len;
-
bad_port:
kfree_skb(skb);
if (net_ratelimit())
opi_len = offsetof(struct ofp_packet_in, data) + fwd_len;
opi = alloc_openflow_skb(dp, opi_len, OFPT_PACKET_IN, NULL, &f_skb);
+ if (!opi) {
+ err = -ENOMEM;
+ goto out;
+ }
opi->buffer_id = htonl(buffer_id);
opi->total_len = htons(skb->len);
- opi->in_port = htons(skb->dev->br_port->port_no);
+ opi->in_port = htons(skb->dev && skb->dev->br_port
+ ? skb->dev->br_port->port_no
+ : OFPP_LOCAL);
opi->reason = reason;
opi->pad = 0;
- memcpy(opi->data, skb_mac_header(skb), fwd_len);
+ skb_copy_bits(skb, 0, opi->data, fwd_len);
err = send_openflow_skb(f_skb, NULL);
+out:
kfree_skb(skb);
-
return err;
}
static void fill_port_desc(struct net_bridge_port *p, struct ofp_phy_port *desc)
{
+ unsigned long flags;
desc->port_no = htons(p->port_no);
strncpy(desc->name, p->dev->name, OFP_MAX_PORT_NAME_LEN);
desc->name[OFP_MAX_PORT_NAME_LEN-1] = '\0';
memcpy(desc->hw_addr, p->dev->dev_addr, ETH_ALEN);
- desc->flags = htonl(p->flags);
- desc->features = 0;
- desc->speed = 0;
+ desc->curr = 0;
+ desc->supported = 0;
+ desc->advertised = 0;
+ desc->peer = 0;
+
+ spin_lock_irqsave(&p->lock, flags);
+ desc->config = htonl(p->config);
+ desc->state = htonl(p->state);
+ spin_unlock_irqrestore(&p->lock, flags);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,24)
if (p->dev->ethtool_ops && p->dev->ethtool_ops->get_settings) {
struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
if (!p->dev->ethtool_ops->get_settings(p->dev, &ecmd)) {
+ /* Set the supported features */
if (ecmd.supported & SUPPORTED_10baseT_Half)
- desc->features |= OFPPF_10MB_HD;
+ desc->supported |= OFPPF_10MB_HD;
if (ecmd.supported & SUPPORTED_10baseT_Full)
- desc->features |= OFPPF_10MB_FD;
+ desc->supported |= OFPPF_10MB_FD;
if (ecmd.supported & SUPPORTED_100baseT_Half)
- desc->features |= OFPPF_100MB_HD;
+ desc->supported |= OFPPF_100MB_HD;
if (ecmd.supported & SUPPORTED_100baseT_Full)
- desc->features |= OFPPF_100MB_FD;
+ desc->supported |= OFPPF_100MB_FD;
if (ecmd.supported & SUPPORTED_1000baseT_Half)
- desc->features |= OFPPF_1GB_HD;
+ desc->supported |= OFPPF_1GB_HD;
if (ecmd.supported & SUPPORTED_1000baseT_Full)
- desc->features |= OFPPF_1GB_FD;
- /* 10Gbps half-duplex doesn't exist... */
+ desc->supported |= OFPPF_1GB_FD;
if (ecmd.supported & SUPPORTED_10000baseT_Full)
- desc->features |= OFPPF_10GB_FD;
-
- desc->features = htonl(desc->features);
- desc->speed = htonl(ecmd.speed);
+ desc->supported |= OFPPF_10GB_FD;
+ if (ecmd.supported & SUPPORTED_TP)
+ desc->supported |= OFPPF_COPPER;
+ if (ecmd.supported & SUPPORTED_FIBRE)
+ desc->supported |= OFPPF_FIBER;
+ if (ecmd.supported & SUPPORTED_Autoneg)
+ desc->supported |= OFPPF_AUTONEG;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,14)
+ if (ecmd.supported & SUPPORTED_Pause)
+ desc->supported |= OFPPF_PAUSE;
+ if (ecmd.supported & SUPPORTED_Asym_Pause)
+ desc->supported |= OFPPF_PAUSE_ASYM;
+#endif /* kernel >= 2.6.14 */
+
+ /* Set the advertised features */
+ if (ecmd.advertising & ADVERTISED_10baseT_Half)
+ desc->advertised |= OFPPF_10MB_HD;
+ if (ecmd.advertising & ADVERTISED_10baseT_Full)
+ desc->advertised |= OFPPF_10MB_FD;
+ if (ecmd.advertising & ADVERTISED_100baseT_Half)
+ desc->advertised |= OFPPF_100MB_HD;
+ if (ecmd.advertising & ADVERTISED_100baseT_Full)
+ desc->advertised |= OFPPF_100MB_FD;
+ if (ecmd.advertising & ADVERTISED_1000baseT_Half)
+ desc->advertised |= OFPPF_1GB_HD;
+ if (ecmd.advertising & ADVERTISED_1000baseT_Full)
+ desc->advertised |= OFPPF_1GB_FD;
+ if (ecmd.advertising & ADVERTISED_10000baseT_Full)
+ desc->advertised |= OFPPF_10GB_FD;
+ if (ecmd.advertising & ADVERTISED_TP)
+ desc->advertised |= OFPPF_COPPER;
+ if (ecmd.advertising & ADVERTISED_FIBRE)
+ desc->advertised |= OFPPF_FIBER;
+ if (ecmd.advertising & ADVERTISED_Autoneg)
+ desc->advertised |= OFPPF_AUTONEG;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,14)
+ if (ecmd.advertising & ADVERTISED_Pause)
+ desc->advertised |= OFPPF_PAUSE;
+ if (ecmd.advertising & ADVERTISED_Asym_Pause)
+ desc->advertised |= OFPPF_PAUSE_ASYM;
+#endif /* kernel >= 2.6.14 */
+
+ /* Set the current features */
+ if (ecmd.speed == SPEED_10)
+ desc->curr = (ecmd.duplex) ? OFPPF_10MB_FD : OFPPF_10MB_HD;
+ else if (ecmd.speed == SPEED_100)
+ desc->curr = (ecmd.duplex) ? OFPPF_100MB_FD : OFPPF_100MB_HD;
+ else if (ecmd.speed == SPEED_1000)
+ desc->curr = (ecmd.duplex) ? OFPPF_1GB_FD : OFPPF_1GB_HD;
+ else if (ecmd.speed == SPEED_10000)
+ desc->curr = OFPPF_10GB_FD;
+
+ if (ecmd.port == PORT_TP)
+ desc->curr |= OFPPF_COPPER;
+ else if (ecmd.port == PORT_FIBRE)
+ desc->curr |= OFPPF_FIBER;
+
+ if (ecmd.autoneg)
+ desc->curr |= OFPPF_AUTONEG;
}
}
#endif
+ desc->curr = htonl(desc->curr);
+ desc->supported = htonl(desc->supported);
+ desc->advertised = htonl(desc->advertised);
+ desc->peer = htonl(desc->peer);
}
static int
struct net_bridge_port *p;
int port_count = 0;
- ofr->datapath_id = cpu_to_be64(dp->id);
+ ofr->datapath_id = cpu_to_be64(dp->id);
- ofr->n_exact = htonl(2 * TABLE_HASH_MAX_FLOWS);
- ofr->n_mac_only = htonl(TABLE_MAC_MAX_FLOWS);
- ofr->n_compression = 0; /* Not supported */
- ofr->n_general = htonl(TABLE_LINEAR_MAX_FLOWS);
- ofr->buffer_mb = htonl(UINT32_MAX);
- ofr->n_buffers = htonl(N_PKT_BUFFERS);
- ofr->capabilities = htonl(OFP_SUPPORTED_CAPABILITIES);
- ofr->actions = htonl(OFP_SUPPORTED_ACTIONS);
+ ofr->n_buffers = htonl(N_PKT_BUFFERS);
+ ofr->n_tables = dp->chain->n_tables;
+ ofr->capabilities = htonl(OFP_SUPPORTED_CAPABILITIES);
+ ofr->actions = htonl(OFP_SUPPORTED_ACTIONS);
+ memset(ofr->pad, 0, sizeof ofr->pad);
list_for_each_entry_rcu (p, &dp->port_list, node) {
fill_port_desc(p, &ofr->ports[port_count]);
int port_count;
/* Overallocate. */
- port_max_len = sizeof(struct ofp_phy_port) * OFPP_MAX;
+ port_max_len = sizeof(struct ofp_phy_port) * DP_MAX_PORTS;
ofr = alloc_openflow_skb(dp, sizeof(*ofr) + port_max_len,
OFPT_FEATURES_REPLY, sender, &skb);
if (!ofr)
struct sk_buff *skb;
struct ofp_switch_config *osc;
- osc = alloc_openflow_skb(dp, sizeof *osc, OFPT_PORT_STATUS, sender,
+ osc = alloc_openflow_skb(dp, sizeof *osc, OFPT_GET_CONFIG_REPLY, sender,
&skb);
if (!osc)
return -ENOMEM;
- memcpy(((char *)osc) + sizeof osc->header,
- ((char *)&dp->config) + sizeof dp->config.header,
- sizeof dp->config - sizeof dp->config.header);
+
+ osc->flags = htons(dp->flags);
+ osc->miss_send_len = htons(dp->miss_send_len);
+
return send_openflow_skb(skb, sender);
}
int
-dp_update_port_flags(struct datapath *dp, const struct ofp_phy_port *opp)
+dp_send_hello(struct datapath *dp, const struct sender *sender,
+ const struct ofp_header *request)
{
- struct net_bridge_port *p;
+ if (request->version < OFP_VERSION) {
+ char err[64];
+ sprintf(err, "Only version 0x%02x supported", OFP_VERSION);
+ dp_send_error_msg(dp, sender, OFPET_HELLO_FAILED,
+ OFPHFC_INCOMPATIBLE, err, strlen(err));
+ return -EINVAL;
+ } else {
+ struct sk_buff *skb;
+ struct ofp_header *reply;
- p = dp->ports[htons(opp->port_no)];
+ reply = alloc_openflow_skb(dp, sizeof *reply,
+ OFPT_HELLO, sender, &skb);
+ if (!reply)
+ return -ENOMEM;
+
+ return send_openflow_skb(skb, sender);
+ }
+}
+
+/* Callback function for a workqueue to disable an interface */
+static void
+down_port_cb(struct work_struct *work)
+{
+ struct net_bridge_port *p = container_of(work, struct net_bridge_port,
+ port_task);
+
+ rtnl_lock();
+ if (dev_change_flags(p->dev, p->dev->flags & ~IFF_UP) < 0)
+ if (net_ratelimit())
+ printk("problem bringing up port %s\n", p->dev->name);
+ rtnl_unlock();
+ p->config |= OFPPC_PORT_DOWN;
+}
+
+/* Callback function for a workqueue to enable an interface */
+static void
+up_port_cb(struct work_struct *work)
+{
+ struct net_bridge_port *p = container_of(work, struct net_bridge_port,
+ port_task);
+
+ rtnl_lock();
+ if (dev_change_flags(p->dev, p->dev->flags | IFF_UP) < 0)
+ if (net_ratelimit())
+ printk("problem bringing down port %s\n", p->dev->name);
+ rtnl_unlock();
+ p->config &= ~OFPPC_PORT_DOWN;
+}
+
+int
+dp_update_port_flags(struct datapath *dp, const struct ofp_port_mod *opm)
+{
+ unsigned long int flags;
+ int port_no = ntohs(opm->port_no);
+ struct net_bridge_port *p;
+ p = (port_no < DP_MAX_PORTS ? dp->ports[port_no]
+ : port_no == OFPP_LOCAL ? dp->local_port
+ : NULL);
/* Make sure the port id hasn't changed since this was sent */
- if (!p || memcmp(opp->hw_addr, p->dev->dev_addr, ETH_ALEN) != 0)
+ if (!p || memcmp(opm->hw_addr, p->dev->dev_addr, ETH_ALEN))
return -1;
-
- p->flags = htonl(opp->flags);
+
+ spin_lock_irqsave(&p->lock, flags);
+ if (opm->mask) {
+ uint32_t config_mask = ntohl(opm->mask);
+ p->config &= ~config_mask;
+ p->config |= ntohl(opm->config) & config_mask;
+ }
+
+ /* Modifying the status of an interface requires taking a lock
+ * that cannot be done from here. For this reason, we use a shared
+ * workqueue, which will cause it to be executed from a safer
+ * context. */
+ if (opm->mask & htonl(OFPPC_PORT_DOWN)) {
+ if ((opm->config & htonl(OFPPC_PORT_DOWN))
+ && (p->config & OFPPC_PORT_DOWN) == 0) {
+ PREPARE_WORK(&p->port_task, down_port_cb);
+ schedule_work(&p->port_task);
+ } else if ((opm->config & htonl(OFPPC_PORT_DOWN)) == 0
+ && (p->config & OFPPC_PORT_DOWN)) {
+ PREPARE_WORK(&p->port_task, up_port_cb);
+ schedule_work(&p->port_task);
+ }
+ }
+ spin_unlock_irqrestore(&p->lock, flags);
return 0;
}
+/* Initialize the port status field of the bridge port. */
+static void
+init_port_status(struct net_bridge_port *p)
+{
+ unsigned long int flags;
-static int
-send_port_status(struct net_bridge_port *p, uint8_t status)
+ spin_lock_irqsave(&p->lock, flags);
+
+ if (p->dev->flags & IFF_UP)
+ p->config &= ~OFPPC_PORT_DOWN;
+ else
+ p->config |= OFPPC_PORT_DOWN;
+
+ if (netif_carrier_ok(p->dev))
+ p->state &= ~OFPPS_LINK_DOWN;
+ else
+ p->state |= OFPPS_LINK_DOWN;
+
+ spin_unlock_irqrestore(&p->lock, flags);
+}
+
+int
+dp_send_port_status(struct net_bridge_port *p, uint8_t status)
{
struct sk_buff *skb;
struct ofp_port_status *ops;
if (!ops)
return -ENOMEM;
ops->reason = status;
+ memset(ops->pad, 0, sizeof ops->pad);
fill_port_desc(p, &ops->desc);
return send_openflow_skb(skb, NULL);
}
int
-dp_send_flow_expired(struct datapath *dp, struct sw_flow *flow)
+dp_send_flow_expired(struct datapath *dp, struct sw_flow *flow,
+ enum ofp_flow_expired_reason reason)
{
struct sk_buff *skb;
struct ofp_flow_expired *ofe;
- unsigned long duration_j;
+
+ if (!(dp->flags & OFPC_SEND_FLOW_EXP))
+ return 0;
ofe = alloc_openflow_skb(dp, sizeof *ofe, OFPT_FLOW_EXPIRED, 0, &skb);
if (!ofe)
return -ENOMEM;
flow_fill_match(&ofe->match, &flow->key);
- duration_j = (flow->timeout - HZ * flow->max_idle) - flow->init_time;
- ofe->duration = htonl(duration_j / HZ);
- ofe->packet_count = cpu_to_be64(flow->packet_count);
- ofe->byte_count = cpu_to_be64(flow->byte_count);
- return send_openflow_skb(skb, NULL);
-}
-static void
-fill_flow_stats(struct ofp_flow_stats *ofs, struct sw_flow *flow,
- int table_idx)
-{
- ofs->match.wildcards = htons(flow->key.wildcards);
- ofs->match.in_port = flow->key.in_port;
- memcpy(ofs->match.dl_src, flow->key.dl_src, ETH_ALEN);
- memcpy(ofs->match.dl_dst, flow->key.dl_dst, ETH_ALEN);
- ofs->match.dl_vlan = flow->key.dl_vlan;
- ofs->match.dl_type = flow->key.dl_type;
- ofs->match.nw_src = flow->key.nw_src;
- ofs->match.nw_dst = flow->key.nw_dst;
- ofs->match.nw_proto = flow->key.nw_proto;
- memset(ofs->match.pad, 0, sizeof ofs->match.pad);
- ofs->match.tp_src = flow->key.tp_src;
- ofs->match.tp_dst = flow->key.tp_dst;
- ofs->duration = htonl((jiffies - flow->init_time) / HZ);
- ofs->table_id = table_idx;
- ofs->packet_count = cpu_to_be64(flow->packet_count);
- ofs->byte_count = cpu_to_be64(flow->byte_count);
-}
+ ofe->priority = htons(flow->priority);
+ ofe->reason = reason;
+ memset(ofe->pad, 0, sizeof ofe->pad);
-int
-dp_send_flow_stats(struct datapath *dp, const struct sender *sender,
- const struct ofp_match *match)
-{
- struct sk_buff *skb;
- struct ofp_flow_stat_reply *fsr;
- size_t header_size, fudge, flow_size;
- struct sw_flow_key match_key;
- int table_idx, n_flows, max_flows;
-
- header_size = offsetof(struct ofp_flow_stat_reply, flows);
- fudge = 128;
- flow_size = sizeof fsr->flows[0];
- max_flows = (NLMSG_GOODSIZE - header_size - fudge) / flow_size;
- fsr = alloc_openflow_skb(dp, header_size + max_flows * flow_size,
- OFPT_FLOW_STAT_REPLY, sender, &skb);
- if (!fsr)
- return -ENOMEM;
+ ofe->duration = htonl((jiffies - flow->init_time) / HZ);
+ memset(ofe->pad2, 0, sizeof ofe->pad2);
+ ofe->packet_count = cpu_to_be64(flow->packet_count);
+ ofe->byte_count = cpu_to_be64(flow->byte_count);
- n_flows = 0;
- flow_extract_match(&match_key, match);
- for (table_idx = 0; table_idx < dp->chain->n_tables; table_idx++) {
- struct sw_table *table = dp->chain->tables[table_idx];
- struct swt_iterator iter;
-
- if (n_flows >= max_flows) {
- break;
- }
-
- if (!table->iterator(table, &iter)) {
- if (net_ratelimit())
- printk("iterator failed for table %d\n",
- table_idx);
- continue;
- }
-
- for (; iter.flow; table->iterator_next(&iter)) {
- if (flow_matches(&match_key, &iter.flow->key)) {
- fill_flow_stats(&fsr->flows[n_flows],
- iter.flow, table_idx);
- if (++n_flows >= max_flows) {
- break;
- }
- }
- }
- table->iterator_destroy(&iter);
- }
- resize_openflow_skb(skb, &fsr->header,
- header_size + flow_size * n_flows);
- return send_openflow_skb(skb, sender);
-}
-
-static int
-fill_port_stat_reply(struct datapath *dp, struct ofp_port_stat_reply *psr)
-{
- struct net_bridge_port *p;
- int port_count = 0;
-
- list_for_each_entry_rcu (p, &dp->port_list, node) {
- struct ofp_port_stats *ps = &psr->ports[port_count++];
- struct net_device_stats *stats = p->dev->get_stats(p->dev);
- ps->port_no = htons(p->port_no);
- memset(ps->pad, 0, sizeof ps->pad);
- ps->rx_count = cpu_to_be64(stats->rx_packets);
- ps->tx_count = cpu_to_be64(stats->tx_packets);
- ps->drop_count = cpu_to_be64(stats->rx_dropped
- + stats->tx_dropped);
- }
-
- return port_count;
+ return send_openflow_skb(skb, NULL);
}
+EXPORT_SYMBOL(dp_send_flow_expired);
int
-dp_send_port_stats(struct datapath *dp, const struct sender *sender)
+dp_send_error_msg(struct datapath *dp, const struct sender *sender,
+ uint16_t type, uint16_t code, const void *data, size_t len)
{
struct sk_buff *skb;
- struct ofp_port_stat_reply *psr;
- size_t psr_len, port_max_len;
- int port_count;
+ struct ofp_error_msg *oem;
- /* Overallocate. */
- port_max_len = sizeof(struct ofp_port_stats) * OFPP_MAX;
- psr = alloc_openflow_skb(dp, sizeof *psr + port_max_len,
- OFPT_PORT_STAT_REPLY, sender, &skb);
- if (!psr)
+
+ oem = alloc_openflow_skb(dp, sizeof(*oem)+len, OFPT_ERROR,
+ sender, &skb);
+ if (!oem)
return -ENOMEM;
- /* Fill. */
- port_count = fill_port_stat_reply(dp, psr);
+ oem->type = htons(type);
+ oem->code = htons(code);
+ memcpy(oem->data, data, len);
- /* Shrink to fit. */
- psr_len = sizeof *psr + sizeof(struct ofp_port_stats) * port_count;
- resize_openflow_skb(skb, &psr->header, psr_len);
return send_openflow_skb(skb, sender);
}
int
-dp_send_table_stats(struct datapath *dp, const struct sender *sender)
+dp_send_echo_reply(struct datapath *dp, const struct sender *sender,
+ const struct ofp_header *rq)
{
struct sk_buff *skb;
- struct ofp_table_stat_reply *tsr;
- int i, n_tables;
-
- n_tables = dp->chain->n_tables;
- tsr = alloc_openflow_skb(dp, (offsetof(struct ofp_table_stat_reply,
- tables)
- + sizeof tsr->tables[0] * n_tables),
- OFPT_TABLE_STAT_REPLY, sender, &skb);
- if (!tsr)
+ struct ofp_header *reply;
+
+ reply = alloc_openflow_skb(dp, ntohs(rq->length), OFPT_ECHO_REPLY,
+ sender, &skb);
+ if (!reply)
return -ENOMEM;
- for (i = 0; i < n_tables; i++) {
- struct ofp_table_stats *ots = &tsr->tables[i];
- struct sw_table_stats stats;
- dp->chain->tables[i]->stats(dp->chain->tables[i], &stats);
- strncpy(ots->name, stats.name, sizeof ots->name);
- ots->table_id = i;
- ots->pad[0] = ots->pad[1] = 0;
- ots->max_entries = htonl(stats.max_flows);
- ots->active_count = htonl(stats.n_flows);
- ots->matched_count = cpu_to_be64(0); /* FIXME */
- }
+
+ memcpy(reply + 1, rq + 1, ntohs(rq->length) - sizeof *rq);
return send_openflow_skb(skb, sender);
}
if (!info->attrs[DP_GENL_A_DP_IDX])
return -EINVAL;
- mutex_lock(&dp_mutex);
dp = dp_get(nla_get_u32((info->attrs[DP_GENL_A_DP_IDX])));
if (!dp)
err = -ENOENT;
del_dp(dp);
err = 0;
}
- mutex_unlock(&dp_mutex);
return err;
}
err = -ENOENT;
else {
void *data;
- ans_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ ans_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
if (!ans_skb) {
err = -ENOMEM;
goto err;
return -EINVAL;
/* Get datapath. */
- mutex_lock(&dp_mutex);
dp = dp_get(nla_get_u32(info->attrs[DP_GENL_A_DP_IDX]));
if (!dp) {
err = -ENOENT;
err = -ENOENT;
goto out_put;
}
- err = del_switch_port(port->br_port);
+ err = dp_del_switch_port(port->br_port);
}
out_put:
dev_put(port);
out:
- mutex_unlock(&dp_mutex);
return err;
}
if (!info->attrs[DP_GENL_A_DP_IDX] || !va)
return -EINVAL;
- rcu_read_lock();
dp = dp_get(nla_get_u32(info->attrs[DP_GENL_A_DP_IDX]));
- if (!dp) {
- err = -ENOENT;
- goto out;
- }
+ if (!dp)
+ return -ENOENT;
- if (nla_len(va) < sizeof(struct ofp_header)) {
- err = -EINVAL;
- goto out;
- }
+ if (nla_len(va) < sizeof(struct ofp_header))
+ return -EINVAL;
oh = nla_data(va);
sender.xid = oh->xid;
sender.pid = info->snd_pid;
sender.seq = info->snd_seq;
- err = fwd_control_input(dp->chain, &sender, nla_data(va), nla_len(va));
-out:
- rcu_read_unlock();
+ mutex_lock(&dp_mutex);
+ err = fwd_control_input(dp->chain, &sender,
+ nla_data(va), nla_len(va));
+ mutex_unlock(&dp_mutex);
return err;
}
[DP_GENL_A_DP_IDX] = { .type = NLA_U32 },
};
-static struct genl_ops dp_genl_ops_openflow = {
- .cmd = DP_GENL_C_OPENFLOW,
- .flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
- .policy = dp_genl_openflow_policy,
- .doit = dp_genl_openflow,
- .dumpit = NULL,
+static int desc_stats_dump(struct datapath *dp, void *state,
+ void *body, int *body_len)
+{
+ struct ofp_desc_stats *ods = body;
+ int n_bytes = sizeof *ods;
+
+ if (n_bytes > *body_len) {
+ return -ENOBUFS;
+ }
+ *body_len = n_bytes;
+
+ strncpy(ods->mfr_desc, mfr_desc, sizeof ods->mfr_desc);
+ strncpy(ods->hw_desc, hw_desc, sizeof ods->hw_desc);
+ strncpy(ods->sw_desc, sw_desc, sizeof ods->sw_desc);
+ strncpy(ods->serial_num, serial_num, sizeof ods->serial_num);
+
+ return 0;
+}
+
+struct flow_stats_state {
+ int table_idx;
+ struct sw_table_position position;
+ const struct ofp_flow_stats_request *rq;
+
+ void *body;
+ int bytes_used, bytes_allocated;
};
-static struct nla_policy dp_genl_benchmark_policy[DP_GENL_A_MAX + 1] = {
- [DP_GENL_A_DP_IDX] = { .type = NLA_U32 },
- [DP_GENL_A_NPACKETS] = { .type = NLA_U32 },
- [DP_GENL_A_PSIZE] = { .type = NLA_U32 },
+static int flow_stats_init(struct datapath *dp, const void *body, int body_len,
+ void **state)
+{
+ const struct ofp_flow_stats_request *fsr = body;
+ struct flow_stats_state *s = kmalloc(sizeof *s, GFP_ATOMIC);
+ if (!s)
+ return -ENOMEM;
+ s->table_idx = fsr->table_id == 0xff ? 0 : fsr->table_id;
+ memset(&s->position, 0, sizeof s->position);
+ s->rq = fsr;
+ *state = s;
+ return 0;
+}
+
+static int flow_stats_dump_callback(struct sw_flow *flow, void *private)
+{
+ struct sw_flow_actions *sf_acts = rcu_dereference(flow->sf_acts);
+ struct flow_stats_state *s = private;
+ struct ofp_flow_stats *ofs;
+ int length;
+
+ length = sizeof *ofs + sf_acts->actions_len;
+ if (length + s->bytes_used > s->bytes_allocated)
+ return 1;
+
+ ofs = s->body + s->bytes_used;
+ ofs->length = htons(length);
+ ofs->table_id = s->table_idx;
+ ofs->pad = 0;
+ ofs->match.wildcards = htonl(flow->key.wildcards);
+ ofs->match.in_port = flow->key.in_port;
+ memcpy(ofs->match.dl_src, flow->key.dl_src, ETH_ALEN);
+ memcpy(ofs->match.dl_dst, flow->key.dl_dst, ETH_ALEN);
+ ofs->match.dl_vlan = flow->key.dl_vlan;
+ ofs->match.dl_type = flow->key.dl_type;
+ ofs->match.nw_src = flow->key.nw_src;
+ ofs->match.nw_dst = flow->key.nw_dst;
+ ofs->match.nw_proto = flow->key.nw_proto;
+ ofs->match.pad = 0;
+ ofs->match.tp_src = flow->key.tp_src;
+ ofs->match.tp_dst = flow->key.tp_dst;
+ ofs->duration = htonl((jiffies - flow->init_time) / HZ);
+ ofs->priority = htons(flow->priority);
+ ofs->idle_timeout = htons(flow->idle_timeout);
+ ofs->hard_timeout = htons(flow->hard_timeout);
+ memset(ofs->pad2, 0, sizeof ofs->pad2);
+ ofs->packet_count = cpu_to_be64(flow->packet_count);
+ ofs->byte_count = cpu_to_be64(flow->byte_count);
+ memcpy(ofs->actions, sf_acts->actions, sf_acts->actions_len);
+
+ s->bytes_used += length;
+ return 0;
+}
+
+static int flow_stats_dump(struct datapath *dp, void *state,
+ void *body, int *body_len)
+{
+ struct flow_stats_state *s = state;
+ struct sw_flow_key match_key;
+ int error = 0;
+
+ s->bytes_used = 0;
+ s->bytes_allocated = *body_len;
+ s->body = body;
+
+ flow_extract_match(&match_key, &s->rq->match);
+ while (s->table_idx < dp->chain->n_tables
+ && (s->rq->table_id == 0xff || s->rq->table_id == s->table_idx))
+ {
+ struct sw_table *table = dp->chain->tables[s->table_idx];
+
+ error = table->iterate(table, &match_key, &s->position,
+ flow_stats_dump_callback, s);
+ if (error)
+ break;
+
+ s->table_idx++;
+ memset(&s->position, 0, sizeof s->position);
+ }
+ *body_len = s->bytes_used;
+
+ /* If error is 0, we're done.
+ * Otherwise, if some bytes were used, there are more flows to come.
+ * Otherwise, we were not able to fit even a single flow in the body,
+ * which indicates that we have a single flow with too many actions to
+ * fit. We won't ever make any progress at that rate, so give up. */
+ return !error ? 0 : s->bytes_used ? 1 : -ENOMEM;
+}
+
+static void flow_stats_done(void *state)
+{
+ kfree(state);
+}
+
+static int aggregate_stats_init(struct datapath *dp,
+ const void *body, int body_len,
+ void **state)
+{
+ *state = (void *)body;
+ return 0;
+}
+
+static int aggregate_stats_dump_callback(struct sw_flow *flow, void *private)
+{
+ struct ofp_aggregate_stats_reply *rpy = private;
+ rpy->packet_count += flow->packet_count;
+ rpy->byte_count += flow->byte_count;
+ rpy->flow_count++;
+ return 0;
+}
+
+static int aggregate_stats_dump(struct datapath *dp, void *state,
+ void *body, int *body_len)
+{
+ struct ofp_aggregate_stats_request *rq = state;
+ struct ofp_aggregate_stats_reply *rpy;
+ struct sw_table_position position;
+ struct sw_flow_key match_key;
+ int table_idx;
+
+ if (*body_len < sizeof *rpy)
+ return -ENOBUFS;
+ rpy = body;
+ *body_len = sizeof *rpy;
+
+ memset(rpy, 0, sizeof *rpy);
+
+ flow_extract_match(&match_key, &rq->match);
+ table_idx = rq->table_id == 0xff ? 0 : rq->table_id;
+ memset(&position, 0, sizeof position);
+ while (table_idx < dp->chain->n_tables
+ && (rq->table_id == 0xff || rq->table_id == table_idx))
+ {
+ struct sw_table *table = dp->chain->tables[table_idx];
+ int error;
+
+ error = table->iterate(table, &match_key, &position,
+ aggregate_stats_dump_callback, rpy);
+ if (error)
+ return error;
+
+ table_idx++;
+ memset(&position, 0, sizeof position);
+ }
+
+ rpy->packet_count = cpu_to_be64(rpy->packet_count);
+ rpy->byte_count = cpu_to_be64(rpy->byte_count);
+ rpy->flow_count = htonl(rpy->flow_count);
+ return 0;
+}
+
+static int table_stats_dump(struct datapath *dp, void *state,
+ void *body, int *body_len)
+{
+ struct ofp_table_stats *ots;
+ int n_bytes = dp->chain->n_tables * sizeof *ots;
+ int i;
+ if (n_bytes > *body_len)
+ return -ENOBUFS;
+ *body_len = n_bytes;
+ for (i = 0, ots = body; i < dp->chain->n_tables; i++, ots++) {
+ struct sw_table_stats stats;
+ dp->chain->tables[i]->stats(dp->chain->tables[i], &stats);
+ strncpy(ots->name, stats.name, sizeof ots->name);
+ ots->table_id = i;
+ ots->wildcards = htonl(stats.wildcards);
+ memset(ots->pad, 0, sizeof ots->pad);
+ ots->max_entries = htonl(stats.max_flows);
+ ots->active_count = htonl(stats.n_flows);
+ ots->lookup_count = cpu_to_be64(stats.n_lookup);
+ ots->matched_count = cpu_to_be64(stats.n_matched);
+ }
+ return 0;
+}
+
+struct port_stats_state {
+ int port;
+};
+
+static int port_stats_init(struct datapath *dp, const void *body, int body_len,
+ void **state)
+{
+ struct port_stats_state *s = kmalloc(sizeof *s, GFP_ATOMIC);
+ if (!s)
+ return -ENOMEM;
+ s->port = 0;
+ *state = s;
+ return 0;
+}
+
+static int port_stats_dump(struct datapath *dp, void *state,
+ void *body, int *body_len)
+{
+ struct port_stats_state *s = state;
+ struct ofp_port_stats *ops;
+ int n_ports, max_ports;
+ int i;
+
+ max_ports = *body_len / sizeof *ops;
+ if (!max_ports)
+ return -ENOMEM;
+ ops = body;
+
+ n_ports = 0;
+ for (i = s->port; i < DP_MAX_PORTS && n_ports < max_ports; i++) {
+ struct net_bridge_port *p = dp->ports[i];
+ struct net_device_stats *stats;
+ if (!p)
+ continue;
+ stats = p->dev->get_stats(p->dev);
+ ops->port_no = htons(p->port_no);
+ memset(ops->pad, 0, sizeof ops->pad);
+ ops->rx_packets = cpu_to_be64(stats->rx_packets);
+ ops->tx_packets = cpu_to_be64(stats->tx_packets);
+ ops->rx_bytes = cpu_to_be64(stats->rx_bytes);
+ ops->tx_bytes = cpu_to_be64(stats->tx_bytes);
+ ops->rx_dropped = cpu_to_be64(stats->rx_dropped);
+ ops->tx_dropped = cpu_to_be64(stats->tx_dropped);
+ ops->rx_errors = cpu_to_be64(stats->rx_errors);
+ ops->tx_errors = cpu_to_be64(stats->tx_errors);
+ ops->rx_frame_err = cpu_to_be64(stats->rx_frame_errors);
+ ops->rx_over_err = cpu_to_be64(stats->rx_over_errors);
+ ops->rx_crc_err = cpu_to_be64(stats->rx_crc_errors);
+ ops->collisions = cpu_to_be64(stats->collisions);
+ n_ports++;
+ ops++;
+ }
+ s->port = i;
+ *body_len = n_ports * sizeof *ops;
+ return n_ports >= max_ports;
+}
+
+static void port_stats_done(void *state)
+{
+ kfree(state);
+}
+
+struct stats_type {
+ /* Minimum and maximum acceptable number of bytes in body member of
+ * struct ofp_stats_request. */
+ size_t min_body, max_body;
+
+ /* Prepares to dump some kind of statistics on 'dp'. 'body' and
+ * 'body_len' are the 'body' member of the struct ofp_stats_request.
+ * Returns zero if successful, otherwise a negative error code.
+ * May initialize '*state' to state information. May be null if no
+ * initialization is required.*/
+ int (*init)(struct datapath *dp, const void *body, int body_len,
+ void **state);
+
+ /* Dumps statistics for 'dp' into the '*body_len' bytes at 'body', and
+ * modifies '*body_len' to reflect the number of bytes actually used.
+ * ('body' will be transmitted as the 'body' member of struct
+ * ofp_stats_reply.) */
+ int (*dump)(struct datapath *dp, void *state,
+ void *body, int *body_len);
+
+ /* Cleans any state created by the init or dump functions. May be null
+ * if no cleanup is required. */
+ void (*done)(void *state);
+};
+
+static const struct stats_type stats[] = {
+ [OFPST_DESC] = {
+ 0,
+ 0,
+ NULL,
+ desc_stats_dump,
+ NULL
+ },
+ [OFPST_FLOW] = {
+ sizeof(struct ofp_flow_stats_request),
+ sizeof(struct ofp_flow_stats_request),
+ flow_stats_init,
+ flow_stats_dump,
+ flow_stats_done
+ },
+ [OFPST_AGGREGATE] = {
+ sizeof(struct ofp_aggregate_stats_request),
+ sizeof(struct ofp_aggregate_stats_request),
+ aggregate_stats_init,
+ aggregate_stats_dump,
+ NULL
+ },
+ [OFPST_TABLE] = {
+ 0,
+ 0,
+ NULL,
+ table_stats_dump,
+ NULL
+ },
+ [OFPST_PORT] = {
+ 0,
+ 0,
+ port_stats_init,
+ port_stats_dump,
+ port_stats_done
+ },
};
-static struct genl_ops dp_genl_ops_benchmark_nl = {
- .cmd = DP_GENL_C_BENCHMARK_NL,
+static int
+dp_genl_openflow_dumpit(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ struct datapath *dp;
+ struct sender sender;
+ const struct stats_type *s;
+ struct ofp_stats_reply *osr;
+ int dp_idx;
+ int max_openflow_len, body_len;
+ void *body;
+ int err;
+
+ /* Set up the cleanup function for this dump. Linux 2.6.20 and later
+ * support setting up cleanup functions via the .doneit member of
+ * struct genl_ops. This kluge supports earlier versions also. */
+ cb->done = dp_genl_openflow_done;
+
+ sender.pid = NETLINK_CB(cb->skb).pid;
+ sender.seq = cb->nlh->nlmsg_seq;
+ if (!cb->args[0]) {
+ struct nlattr *attrs[DP_GENL_A_MAX + 1];
+ struct ofp_stats_request *rq;
+ struct nlattr *va;
+ size_t len, body_len;
+ int type;
+
+ err = nlmsg_parse(cb->nlh, GENL_HDRLEN, attrs, DP_GENL_A_MAX,
+ dp_genl_openflow_policy);
+ if (err < 0)
+ return err;
+
+ if (!attrs[DP_GENL_A_DP_IDX])
+ return -EINVAL;
+ dp_idx = nla_get_u16(attrs[DP_GENL_A_DP_IDX]);
+ dp = dp_get(dp_idx);
+ if (!dp)
+ return -ENOENT;
+
+ va = attrs[DP_GENL_A_OPENFLOW];
+ len = nla_len(va);
+ if (!va || len < sizeof *rq)
+ return -EINVAL;
+
+ rq = nla_data(va);
+ sender.xid = rq->header.xid;
+ type = ntohs(rq->type);
+ if (rq->header.version != OFP_VERSION) {
+ dp_send_error_msg(dp, &sender, OFPET_BAD_REQUEST,
+ OFPBRC_BAD_VERSION, rq, len);
+ return -EINVAL;
+ }
+ if (rq->header.type != OFPT_STATS_REQUEST
+ || ntohs(rq->header.length) != len)
+ return -EINVAL;
+
+ if (type >= ARRAY_SIZE(stats) || !stats[type].dump) {
+ dp_send_error_msg(dp, &sender, OFPET_BAD_REQUEST,
+ OFPBRC_BAD_STAT, rq, len);
+ return -EINVAL;
+ }
+
+ s = &stats[type];
+ body_len = len - offsetof(struct ofp_stats_request, body);
+ if (body_len < s->min_body || body_len > s->max_body)
+ return -EINVAL;
+
+ cb->args[0] = 1;
+ cb->args[1] = dp_idx;
+ cb->args[2] = type;
+ cb->args[3] = rq->header.xid;
+ if (s->init) {
+ void *state;
+ err = s->init(dp, rq->body, body_len, &state);
+ if (err)
+ return err;
+ cb->args[4] = (long) state;
+ }
+ } else if (cb->args[0] == 1) {
+ sender.xid = cb->args[3];
+ dp_idx = cb->args[1];
+ s = &stats[cb->args[2]];
+
+ dp = dp_get(dp_idx);
+ if (!dp)
+ return -ENOENT;
+ } else {
+ return 0;
+ }
+
+ osr = put_openflow_headers(dp, skb, OFPT_STATS_REPLY, &sender,
+ &max_openflow_len);
+ if (IS_ERR(osr))
+ return PTR_ERR(osr);
+ osr->type = htons(s - stats);
+ osr->flags = 0;
+ resize_openflow_skb(skb, &osr->header, max_openflow_len);
+ body = osr->body;
+ body_len = max_openflow_len - offsetof(struct ofp_stats_reply, body);
+
+ err = s->dump(dp, (void *) cb->args[4], body, &body_len);
+ if (err >= 0) {
+ if (!err)
+ cb->args[0] = 2;
+ else
+ osr->flags = ntohs(OFPSF_REPLY_MORE);
+ resize_openflow_skb(skb, &osr->header,
+ (offsetof(struct ofp_stats_reply, body)
+ + body_len));
+ err = skb->len;
+ }
+
+ return err;
+}
+
+static int
+dp_genl_openflow_done(struct netlink_callback *cb)
+{
+ if (cb->args[0]) {
+ const struct stats_type *s = &stats[cb->args[2]];
+ if (s->done)
+ s->done((void *) cb->args[4]);
+ }
+ return 0;
+}
+
+static struct genl_ops dp_genl_ops_openflow = {
+ .cmd = DP_GENL_C_OPENFLOW,
.flags = GENL_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
- .policy = dp_genl_benchmark_policy,
- .doit = dp_genl_benchmark_nl,
- .dumpit = NULL,
+ .policy = dp_genl_openflow_policy,
+ .doit = dp_genl_openflow,
+ .dumpit = dp_genl_openflow_dumpit,
};
static struct genl_ops *dp_genl_all_ops[] = {
&dp_genl_ops_query_dp,
&dp_genl_ops_add_port,
&dp_genl_ops_del_port,
- &dp_genl_ops_benchmark_nl,
};
static int dp_init_netlink(void)
genl_unregister_family(&dp_genl_family);
}
-#define DRV_NAME "openflow"
-#define DRV_VERSION VERSION
-#define DRV_DESCRIPTION "OpenFlow switching datapath implementation"
-#define DRV_COPYRIGHT "Copyright (c) 2007, 2008 The Board of Trustees of The Leland Stanford Junior University"
-
+/* Set the description strings if appropriate values are available from
+ * the DMI. */
+static void set_desc(void)
+{
+ const char *uuid = dmi_get_system_info(DMI_PRODUCT_UUID);
+ const char *uptr = uuid + 24;
+
+ if (!uuid || *uuid == '\0' || strlen(uuid) != 36)
+ return;
+
+ /* We are only interested version 1 UUIDs, since the last six bytes
+ * are an IEEE 802 MAC address. */
+ if (uuid[14] != '1')
+ return;
+
+ /* Only set if the UUID is from Nicira. */
+ if (strncmp(uptr, NICIRA_OUI_STR, strlen(NICIRA_OUI_STR)))
+ return;
+
+ strlcpy(mfr_desc, dmi_get_system_info(DMI_SYS_VENDOR), sizeof(mfr_desc));
+ snprintf(hw_desc, sizeof(hw_desc), "%s %s",
+ dmi_get_system_info(DMI_PRODUCT_NAME),
+ dmi_get_system_info(DMI_PRODUCT_VERSION));
+ strlcpy(serial_num, dmi_get_system_info(DMI_PRODUCT_SERIAL),
+ sizeof(serial_num));
+}
static int __init dp_init(void)
{
int err;
- printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION "\n");
- printk(KERN_INFO DRV_NAME ": " VERSION" built on "__DATE__" "__TIME__"\n");
- printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
+ printk("OpenFlow %s, built "__DATE__" "__TIME__", "
+ "protocol 0x%02x\n", VERSION BUILDNR, OFP_VERSION);
err = flow_init();
if (err)
goto error;
- err = dp_init_netlink();
+ err = register_netdevice_notifier(&dp_device_notifier);
if (err)
goto error_flow_exit;
+ err = dp_init_netlink();
+ if (err)
+ goto error_unreg_notifier;
+
+ /* Check if better descriptions of the switch are available than the
+ * defaults. */
+ set_desc();
+
/* Hook into callback used by the bridge to intercept packets.
* Parasites we are. */
if (br_handle_frame_hook)
return 0;
+error_unreg_notifier:
+ unregister_netdevice_notifier(&dp_device_notifier);
error_flow_exit:
flow_exit();
error:
{
fwd_exit();
dp_uninit_netlink();
+ unregister_netdevice_notifier(&dp_device_notifier);
flow_exit();
br_handle_frame_hook = NULL;
}
module_init(dp_init);
module_exit(dp_cleanup);
-MODULE_DESCRIPTION(DRV_DESCRIPTION);
-MODULE_AUTHOR(DRV_COPYRIGHT);
+MODULE_DESCRIPTION("OpenFlow switching datapath");
+MODULE_AUTHOR("Copyright (c) 2007, 2008 The Board of Trustees of The Leland Stanford Junior University");
MODULE_LICENSE("GPL");
git://git.onelab.eu / sliver-openvswitch.git / blobdiff