/*
- * Copyright (c) 2010 Nicira Networks.
- * Distributed under the terms of the GNU GPL version 2.
+ * Copyright (c) 2007-2012 Nicira, Inc.
*
- * Significant portions of this file may be copied from parts of the Linux
- * kernel, by Linus Torvalds and others.
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
*/
#ifndef VPORT_H
#define VPORT_H 1
+#include <linux/if_tunnel.h>
#include <linux/list.h>
+#include <linux/netlink.h>
+#include <linux/openvswitch.h>
+#include <linux/reciprocal_div.h>
#include <linux/skbuff.h>
#include <linux/spinlock.h>
-
-#include "datapath.h"
-#include "openvswitch/datapath-protocol.h"
-#include "odp-compat.h"
+#include <linux/u64_stats_sync.h>
struct vport;
-struct dp_port;
+struct vport_parms;
/* The following definitions are for users of the vport subsytem: */
+struct vport_net {
+ struct vport __rcu *gre_vport;
+ struct vport __rcu *gre64_vport;
+};
-void vport_lock(void);
-void vport_unlock(void);
-
-int vport_init(void);
-void vport_exit(void);
-
-int vport_add(const struct odp_vport_add __user *);
-int vport_mod(const struct odp_vport_mod __user *);
-int vport_del(const char __user *udevname);
-
-#ifdef CONFIG_COMPAT
-int compat_vport_add(struct compat_odp_vport_add __user *);
-int compat_vport_mod(struct compat_odp_vport_mod __user *);
-#endif
-
-int vport_stats_get(struct odp_vport_stats_req __user *);
-int vport_ether_get(struct odp_vport_ether __user *);
-int vport_ether_set(struct odp_vport_ether __user *);
-int vport_mtu_get(struct odp_vport_mtu __user *);
-int vport_mtu_set(struct odp_vport_mtu __user *);
-
-struct vport *__vport_add(const char *name, const char *type, const void __user *config);
-int __vport_mod(struct vport *, const void __user *config);
-int __vport_del(struct vport *);
-
-struct vport *vport_locate(const char *name);
-
-int vport_attach(struct vport *, struct dp_port *);
-int vport_detach(struct vport *);
-
-int vport_set_mtu(struct vport *, int mtu);
-int vport_set_addr(struct vport *, const unsigned char *);
-
-const char *vport_get_name(const struct vport *);
-const char *vport_get_type(const struct vport *);
-const unsigned char *vport_get_addr(const struct vport *);
+int ovs_vport_init(void);
+void ovs_vport_exit(void);
-struct dp_port *vport_get_dp_port(const struct vport *);
+struct vport *ovs_vport_add(const struct vport_parms *);
+void ovs_vport_del(struct vport *);
-struct kobject *vport_get_kobj(const struct vport *);
+struct vport *ovs_vport_locate(struct net *net, const char *name);
-unsigned vport_get_flags(const struct vport *);
-int vport_is_running(const struct vport *);
-unsigned char vport_get_operstate(const struct vport *);
+void ovs_vport_set_stats(struct vport *, struct ovs_vport_stats *);
+void ovs_vport_get_stats(struct vport *, struct ovs_vport_stats *);
-int vport_get_ifindex(const struct vport *);
-int vport_get_iflink(const struct vport *);
+int ovs_vport_set_options(struct vport *, struct nlattr *options);
+int ovs_vport_get_options(const struct vport *, struct sk_buff *);
-int vport_get_mtu(const struct vport *);
+int ovs_vport_set_upcall_portids(struct vport *, struct nlattr *pids);
+int ovs_vport_get_upcall_portids(const struct vport *, struct sk_buff *);
+u32 ovs_vport_find_upcall_portid(const struct vport *, struct sk_buff *);
-int vport_send(struct vport *, struct sk_buff *);
+int ovs_vport_send(struct vport *, struct sk_buff *);
/* The following definitions are for implementers of vport devices: */
-struct vport_percpu_stats {
- u64 rx_bytes;
- u64 rx_packets;
- u64 tx_bytes;
- u64 tx_packets;
-};
-
struct vport_err_stats {
- spinlock_t lock;
-
u64 rx_dropped;
u64 rx_errors;
- u64 rx_frame_err;
- u64 rx_over_err;
- u64 rx_crc_err;
u64 tx_dropped;
u64 tx_errors;
- u64 collisions;
+};
+/**
+ * struct vport_portids - array of netlink portids of a vport.
+ * must be protected by rcu.
+ * @rn_ids: The reciprocal value of @n_ids.
+ * @rcu: RCU callback head for deferred destruction.
+ * @n_ids: Size of @ids array.
+ * @ids: Array storing the Netlink socket pids to be used for packets received
+ * on this port that miss the flow table.
+ */
+struct vport_portids {
+ struct reciprocal_value rn_ids;
+ struct rcu_head rcu;
+ u32 n_ids;
+ u32 ids[];
};
+/**
+ * struct vport - one port within a datapath
+ * @rcu: RCU callback head for deferred destruction.
+ * @dp: Datapath to which this port belongs.
+ * @upcall_portids: RCU protected 'struct vport_portids'.
+ * @port_no: Index into @dp's @ports array.
+ * @hash_node: Element in @dev_table hash table in vport.c.
+ * @dp_hash_node: Element in @datapath->ports hash table in datapath.c.
+ * @ops: Class structure.
+ * @percpu_stats: Points to per-CPU statistics used and maintained by vport
+ * @stats_lock: Protects @err_stats and @offset_stats.
+ * @err_stats: Points to error statistics used and maintained by vport
+ * @offset_stats: Added to actual statistics as a sop to compatibility with
+ * XAPI for Citrix XenServer. Deprecated.
+ */
struct vport {
+ struct rcu_head rcu;
+ struct datapath *dp;
+ struct vport_portids __rcu *upcall_portids;
+ u16 port_no;
+
struct hlist_node hash_node;
+ struct hlist_node dp_hash_node;
const struct vport_ops *ops;
- struct dp_port *dp_port;
- struct vport_percpu_stats *percpu_stats;
+ struct pcpu_sw_netstats __percpu *percpu_stats;
+
+ spinlock_t stats_lock;
struct vport_err_stats err_stats;
+ struct ovs_vport_stats offset_stats;
};
-#define VPORT_F_REQUIRED (1 << 0) /* If init fails, module loading fails. */
-#define VPORT_F_GEN_STATS (1 << 1) /* Track stats at the generic layer. */
-#define VPORT_F_TUN_ID (1 << 2) /* Sets OVS_CB(skb)->tun_id. */
+/**
+ * struct vport_parms - parameters for creating a new vport
+ *
+ * @name: New vport's name.
+ * @type: New vport's type.
+ * @options: %OVS_VPORT_ATTR_OPTIONS attribute from Netlink message, %NULL if
+ * none was supplied.
+ * @dp: New vport's datapath.
+ * @port_no: New vport's port number.
+ */
+struct vport_parms {
+ const char *name;
+ enum ovs_vport_type type;
+ struct nlattr *options;
+
+ /* For ovs_vport_alloc(). */
+ struct datapath *dp;
+ u16 port_no;
+ struct nlattr *upcall_portids;
+};
/**
* struct vport_ops - definition of a type of virtual port
*
- * @type: Name of port type, such as "netdev" or "internal" to be matched
- * against the device type when a new port needs to be created.
- * @flags: Flags of type VPORT_F_* that influence how the generic vport layer
- * handles this vport.
- * @init: Called at module initialization. If VPORT_F_REQUIRED is set then the
- * failure of this function will cause the module to not load. If the flag is
- * not set and initialzation fails then no vports of this type can be created.
- * @exit: Called at module unload.
- * @create: Create a new vport called 'name' with vport type specific
- * configuration 'config' (which must be copied from userspace before use). On
- * success must allocate a new vport using vport_alloc().
- * @modify: Modify the configuration of an existing vport. May be null if
- * modification is not supported.
- * @destroy: Destroy and free a vport using vport_free(). Prior to destruction
- * @detach will be called followed by synchronize_rcu().
- * @attach: Attach a previously created vport to a datapath. After attachment
- * packets may be sent and received. Prior to attachment any packets may be
- * silently discarded. May be null if not needed.
- * @detach: Detach a vport from a datapath. May be null if not needed.
- * @set_mtu: Set the device's MTU. May be null if not supported.
- * @set_addr: Set the device's MAC address. May be null if not supported.
+ * @type: %OVS_VPORT_TYPE_* value for this type of virtual port.
+ * @create: Create a new vport configured as specified. On success returns
+ * a new vport allocated with ovs_vport_alloc(), otherwise an ERR_PTR() value.
+ * @destroy: Destroys a vport. Must call vport_free() on the vport but not
+ * before an RCU grace period has elapsed.
+ * @set_options: Modify the configuration of an existing vport. May be %NULL
+ * if modification is not supported.
+ * @get_options: Appends vport-specific attributes for the configuration of an
+ * existing vport to a &struct sk_buff. May be %NULL for a vport that does not
+ * have any configuration.
* @get_name: Get the device's name.
- * @get_addr: Get the device's MAC address.
- * @get_kobj: Get the kobj associated with the device (may return null).
- * @get_stats: Fill in the transmit/receive stats. May be null if stats are
- * not supported or if generic stats are in use. If defined overrides
- * VPORT_F_GEN_STATS.
- * @get_dev_flags: Get the device's flags.
- * @is_running: Checks whether the device is running.
- * @get_operstate: Get the device's operating state.
- * @get_ifindex: Get the system interface index associated with the device.
- * May be null if the device does not have an ifindex.
- * @get_iflink: Get the system interface index associated with the device that
- * will be used to send packets (may be different than ifindex for tunnels).
- * May be null if the device does not have an iflink.
- * @get_mtu: Get the device's MTU.
- * @send: Send a packet on the device. Returns the length of the packet sent.
+ * @send: Send a packet on the device. Returns the length of the packet sent,
+ * zero for dropped packets or negative for error.
*/
struct vport_ops {
- const char *type;
- u32 flags;
+ enum ovs_vport_type type;
- /* Called at module init and exit respectively. */
- int (*init)(void);
- void (*exit)(void);
+ /* Called with ovs_mutex. */
+ struct vport *(*create)(const struct vport_parms *);
+ void (*destroy)(struct vport *);
- /* Called with RTNL lock. */
- struct vport *(*create)(const char *name, const void __user *config);
- int (*modify)(struct vport *, const void __user *config);
- int (*destroy)(struct vport *);
+ int (*set_options)(struct vport *, struct nlattr *);
+ int (*get_options)(const struct vport *, struct sk_buff *);
- int (*attach)(struct vport *);
- int (*detach)(struct vport *);
-
- int (*set_mtu)(struct vport *, int mtu);
- int (*set_addr)(struct vport *, const unsigned char *);
-
- /* Called with rcu_read_lock or RTNL lock. */
+ /* Called with rcu_read_lock or ovs_mutex. */
const char *(*get_name)(const struct vport *);
- const unsigned char *(*get_addr)(const struct vport *);
- struct kobject *(*get_kobj)(const struct vport *);
- int (*get_stats)(const struct vport *, struct odp_vport_stats *);
-
- unsigned (*get_dev_flags)(const struct vport *);
- int (*is_running)(const struct vport *);
- unsigned char (*get_operstate)(const struct vport *);
-
- int (*get_ifindex)(const struct vport *);
- int (*get_iflink)(const struct vport *);
-
- int (*get_mtu)(const struct vport *);
int (*send)(struct vport *, struct sk_buff *);
};
enum vport_err_type {
VPORT_E_RX_DROPPED,
VPORT_E_RX_ERROR,
- VPORT_E_RX_FRAME,
- VPORT_E_RX_OVER,
- VPORT_E_RX_CRC,
VPORT_E_TX_DROPPED,
VPORT_E_TX_ERROR,
- VPORT_E_COLLISION,
};
-struct vport *vport_alloc(int priv_size, const struct vport_ops *);
-void vport_free(struct vport *);
+struct vport *ovs_vport_alloc(int priv_size, const struct vport_ops *,
+ const struct vport_parms *);
+void ovs_vport_free(struct vport *);
+void ovs_vport_deferred_free(struct vport *vport);
#define VPORT_ALIGN 8
* area was allocated on creation. This allows that area to be accessed and
* used for any purpose needed by the vport implementer.
*/
-static inline void *
-vport_priv(const struct vport *vport)
+static inline void *vport_priv(const struct vport *vport)
{
- return (u8 *)vport + ALIGN(sizeof(struct vport), VPORT_ALIGN);
+ return (u8 *)(uintptr_t)vport + ALIGN(sizeof(struct vport), VPORT_ALIGN);
}
/**
* the result of a hash table lookup. @priv must point to the start of the
* private data area.
*/
-static inline struct vport *
-vport_from_priv(const void *priv)
+static inline struct vport *vport_from_priv(void *priv)
{
- return (struct vport *)(priv - ALIGN(sizeof(struct vport), VPORT_ALIGN));
+ return (struct vport *)((u8 *)priv - ALIGN(sizeof(struct vport), VPORT_ALIGN));
}
-void vport_receive(struct vport *, struct sk_buff *);
-void vport_record_error(struct vport *, enum vport_err_type err_type);
-void vport_gen_ether_addr(u8 *addr);
+void ovs_vport_receive(struct vport *, struct sk_buff *,
+ struct ovs_key_ipv4_tunnel *);
+
+/* List of statically compiled vport implementations. Don't forget to also
+ * add yours to the list at the top of vport.c. */
+extern const struct vport_ops ovs_netdev_vport_ops;
+extern const struct vport_ops ovs_internal_vport_ops;
+extern const struct vport_ops ovs_gre_vport_ops;
+extern const struct vport_ops ovs_gre64_vport_ops;
+extern const struct vport_ops ovs_vxlan_vport_ops;
+extern const struct vport_ops ovs_lisp_vport_ops;
+static inline void ovs_skb_postpush_rcsum(struct sk_buff *skb,
+ const void *start, unsigned int len)
+{
+ if (skb->ip_summed == CHECKSUM_COMPLETE)
+ skb->csum = csum_add(skb->csum, csum_partial(start, len, 0));
+}
#endif /* vport.h */
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