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datapath: genl_notify() on port disappearances.

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Before this patch, if a vport detached itself from the datapath
without interaction from userspace, rtnetlink notifications would
be sent, but genl notifications would not.

Feature #6809.

Signed-off-by: Ethan Jackson <ethan@nicira.com>
Acked-by: Jesse Gross <jesse@nicira.com>
This commit is contained in:
Ethan Jackson
2011-08-23 17:20:00 -07:00
parent e408762f5d
commit f14d80834e
3 changed files with 23 additions and 4 deletions
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6
datapath/datapath.c
View File

@@ -1603,7 +1603,7 @@ static struct genl_family dp_vport_genl_family = {
.maxattr = OVS_VPORT_ATTR_MAX
};
static struct genl_multicast_group dp_vport_multicast_group = {
struct genl_multicast_group dp_vport_multicast_group = {
.name = OVS_VPORT_MCGROUP
};
@@ -1662,8 +1662,8 @@ error:
}
/* Called with RTNL lock or RCU read lock. */
static struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 pid,
u32 seq, u8 cmd)
struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, u32 pid,
u32 seq, u8 cmd)
{
struct sk_buff *skb;
int retval;

3
datapath/datapath.h
View File

@@ -144,6 +144,7 @@ struct dp_upcall_info {
};
extern struct notifier_block dp_device_notifier;
extern struct genl_multicast_group dp_vport_multicast_group;
extern int (*dp_ioctl_hook)(struct net_device *dev, struct ifreq *rq, int cmd);
void dp_process_received_packet(struct vport *, struct sk_buff *);
@@ -154,5 +155,7 @@ void set_internal_devs_mtu(const struct datapath *dp);
struct datapath *get_dp(int dp_idx);
const char *dp_name(const struct datapath *dp);
struct sk_buff *ovs_vport_cmd_build_info(struct vport *, u32 pid, u32 seq,
u8 cmd);
#endif /* datapath.h */

18
datapath/dp_notify.c
View File

@@ -9,6 +9,7 @@
/* Handle changes to managed devices */
#include <linux/netdevice.h>
#include <net/genetlink.h>
#include "datapath.h"
#include "vport-internal_dev.h"
@@ -33,8 +34,23 @@ static int dp_device_event(struct notifier_block *unused, unsigned long event,
switch (event) {
case NETDEV_UNREGISTER:
if (!is_internal_dev(dev))
if (!is_internal_dev(dev)) {
struct sk_buff *reply;
dp_detach_port(vport);
reply = ovs_vport_cmd_build_info(vport, 0, 0,
OVS_VPORT_CMD_DEL);
if (IS_ERR(reply)) {
netlink_set_err(INIT_NET_GENL_SOCK, 0,
dp_vport_multicast_group.id,
PTR_ERR(reply));
break;
}
genl_notify(reply, dev_net(dev), 0,
dp_vport_multicast_group.id, NULL,
GFP_KERNEL);
}
break;
case NETDEV_CHANGENAME: