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linux_dsm_epyc7002/include/linux/if_macvlan.h

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[NET]: Add macvlan driver Add macvlan driver, which allows to create virtual ethernet devices based on MAC address. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-15 08:55:06 +07:00
#ifndef _LINUX_IF_MACVLAN_H
#define _LINUX_IF_MACVLAN_H
macvlan: allow multiple driver backends This makes it possible to hook into the macvlan driver from another kernel module. In particular, the goal is to extend it with the macvtap backend that provides a tun/tap compatible interface directly on the macvlan device. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-01-30 19:23:40 +07:00
#include <linux/if_link.h>
#include <linux/list.h>
#include <linux/netdevice.h>
#include <linux/netlink.h>
#include <net/netlink.h>
net/macvtap: add vhost support This adds support for passing a macvtap file descriptor into vhost-net, much like we already do for tun/tap. Most of the new code is taken from the respective patch in the tun driver and may get consolidated in the future. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Sridhar Samudrala <sri@us.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-02-18 12:46:50 +07:00
#if defined(CONFIG_MACVTAP) || defined(CONFIG_MACVTAP_MODULE)
struct socket *macvtap_get_socket(struct file *);
#else
#include <linux/err.h>
#include <linux/errno.h>
struct file;
struct socket;
static inline struct socket *macvtap_get_socket(struct file *f)
{
return ERR_PTR(-EINVAL);
}
#endif /* CONFIG_MACVTAP */
macvlan: allow multiple driver backends This makes it possible to hook into the macvlan driver from another kernel module. In particular, the goal is to extend it with the macvtap backend that provides a tun/tap compatible interface directly on the macvlan device. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-01-30 19:23:40 +07:00
struct macvlan_port;
struct macvtap_queue;
/**
* struct macvlan_rx_stats - MACVLAN percpu rx stats
* @rx_packets: number of received packets
* @rx_bytes: number of received bytes
* @multicast: number of received multicast packets
* @rx_errors: number of errors
*/
struct macvlan_rx_stats {
unsigned long rx_packets;
unsigned long rx_bytes;
unsigned long multicast;
unsigned long rx_errors;
};
struct macvlan_dev {
struct net_device *dev;
struct list_head list;
struct hlist_node hlist;
struct macvlan_port *port;
struct net_device *lowerdev;
percpu: add __percpu sparse annotations to net drivers Add __percpu sparse annotations to net drivers. These annotations are to make sparse consider percpu variables to be in a different address space and warn if accessed without going through percpu accessors. This patch doesn't affect normal builds. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: David S. Miller <davem@davemloft.net> Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-02-16 22:21:08 +07:00
struct macvlan_rx_stats __percpu *rx_stats;
macvlan: allow multiple driver backends This makes it possible to hook into the macvlan driver from another kernel module. In particular, the goal is to extend it with the macvtap backend that provides a tun/tap compatible interface directly on the macvlan device. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-01-30 19:23:40 +07:00
enum macvlan_mode mode;
int (*receive)(struct sk_buff *skb);
int (*forward)(struct net_device *dev, struct sk_buff *skb);
net: macvtap driver In order to use macvlan with qemu and other tools that require a tap file descriptor, the macvtap driver adds a small backend with a character device with the same interface as the tun driver, with a minimum set of features. Macvtap interfaces are created in the same way as macvlan interfaces using ip link, but the netif is just used as a handle for configuration and accounting, while the data goes through the chardev. Each macvtap interface has its own character device, simplifying permission management significantly over the generic tun/tap driver. Cc: Patrick McHardy <kaber@trash.net> Cc: Stephen Hemminger <shemminger@linux-foundation.org> Cc: David S. Miller" <davem@davemloft.net> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Or Gerlitz <ogerlitz@voltaire.com> Cc: netdev@vger.kernel.org Cc: bridge@lists.linux-foundation.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-01-30 19:24:26 +07:00
struct macvtap_queue *tap;
macvlan: allow multiple driver backends This makes it possible to hook into the macvlan driver from another kernel module. In particular, the goal is to extend it with the macvtap backend that provides a tun/tap compatible interface directly on the macvlan device. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-01-30 19:23:40 +07:00
};
static inline void macvlan_count_rx(const struct macvlan_dev *vlan,
unsigned int len, bool success,
bool multicast)
{
struct macvlan_rx_stats *rx_stats;
rx_stats = per_cpu_ptr(vlan->rx_stats, smp_processor_id());
if (likely(success)) {
rx_stats->rx_packets++;;
rx_stats->rx_bytes += len;
if (multicast)
rx_stats->multicast++;
} else {
rx_stats->rx_errors++;
}
}
macvtap: Limit packet queue length Mark Wagner reported OOM symptoms when sending UDP traffic over a macvtap link to a kvm receiver. This appears to be caused by the fact that macvtap packet queues are unlimited in length. This means that if the receiver can't keep up with the rate of flow, then we will hit OOM. Of course it gets worse if the OOM killer then decides to kill the receiver. This patch imposes a cap on the packet queue length, in the same way as the tuntap driver, using the device TX queue length. Please note that macvtap currently has no way of giving congestion notification, that means the software device TX queue cannot be used and packets will always be dropped once the macvtap driver queue fills up. This shouldn't be a great problem for the scenario where macvtap is used to feed a kvm receiver, as the traffic is most likely external in origin so congestion notification can't be applied anyway. Of course, if anybody decides to complain about guest-to-guest UDP packet loss down the track, then we may have to revisit this. Incidentally, this patch also fixes a real memory leak when macvtap_get_queue fails. Chris Wright noticed that for this patch to work, we need a non-zero TX queue length. This patch includes his work to change the default macvtap TX queue length to 500. Reported-by: Mark Wagner <mwagner@redhat.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Acked-by: Chris Wright <chrisw@sous-sol.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-07-22 04:44:31 +07:00
extern void macvlan_common_setup(struct net_device *dev);
macvlan: allow multiple driver backends This makes it possible to hook into the macvlan driver from another kernel module. In particular, the goal is to extend it with the macvtap backend that provides a tun/tap compatible interface directly on the macvlan device. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-01-30 19:23:40 +07:00
extern int macvlan_common_newlink(struct net *src_net, struct net_device *dev,
struct nlattr *tb[], struct nlattr *data[],
int (*receive)(struct sk_buff *skb),
int (*forward)(struct net_device *dev,
struct sk_buff *skb));
extern void macvlan_count_rx(const struct macvlan_dev *vlan,
unsigned int len, bool success,
bool multicast);
extern void macvlan_dellink(struct net_device *dev, struct list_head *head);
extern int macvlan_link_register(struct rtnl_link_ops *ops);
extern netdev_tx_t macvlan_start_xmit(struct sk_buff *skb,
struct net_device *dev);
net: adjust handle_macvlan to pass port struct to hook Now there's null check here and also again in the hook. Looking at bridge bits which are simmilar, port structure is rcu_dereferenced right away in handle_bridge and passed to hook. Looks nicer. Signed-off-by: Jiri Pirko <jpirko@redhat.com> Acked-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-05-06 08:33:53 +07:00
extern struct sk_buff *(*macvlan_handle_frame_hook)(struct macvlan_port *,
struct sk_buff *);
[NET]: Add macvlan driver Add macvlan driver, which allows to create virtual ethernet devices based on MAC address. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-15 08:55:06 +07:00
#endif /* _LINUX_IF_MACVLAN_H */
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