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net/sched: act_mirred: Add new tc_action_ops get_dev()

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Adding support to a new tc_action_ops.
get_dev is a general option which allows to get the underline
device when trying to offload a tc rule.

In case of mirred action the returned device is the mirred (egress)
device.

Signed-off-by: Hadar Hen Zion <hadarh@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Hadar Hen Zion 2016-12-01 14:06:36 +02:00 • committed by David S. Miller
parent 3036dab670
commit 255cb30425
2 changed files with 14 additions and 0 deletions
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2
include/net/act_api.h
View file

@ -119,6 +119,8 @@ struct tc_action_ops {
int (*walk)(struct net *, struct sk_buff *, int (*walk)(struct net *, struct sk_buff *,
struct netlink_callback *, int, const struct tc_action_ops *); struct netlink_callback *, int, const struct tc_action_ops *);
void (*stats_update)(struct tc_action *, u64, u32, u64); void (*stats_update)(struct tc_action *, u64, u32, u64);
int (*get_dev)(const struct tc_action *a, struct net *net,
struct net_device **mirred_dev);
}; };
struct tc_action_net { struct tc_action_net {

12
net/sched/act_mirred.c
View file

@ -315,6 +315,17 @@ static struct notifier_block mirred_device_notifier = {
.notifier_call = mirred_device_event, .notifier_call = mirred_device_event,
}; };
static int tcf_mirred_device(const struct tc_action *a, struct net *net,
struct net_device **mirred_dev)
{
int ifindex = tcf_mirred_ifindex(a);
*mirred_dev = __dev_get_by_index(net, ifindex);
if (!mirred_dev)
return -EINVAL;
return 0;
}
static struct tc_action_ops act_mirred_ops = { static struct tc_action_ops act_mirred_ops = {
.kind = "mirred", .kind = "mirred",
.type = TCA_ACT_MIRRED, .type = TCA_ACT_MIRRED,
@ -327,6 +338,7 @@ static struct tc_action_ops act_mirred_ops = {
.walk = tcf_mirred_walker, .walk = tcf_mirred_walker,
.lookup = tcf_mirred_search, .lookup = tcf_mirred_search,
.size = sizeof(struct tcf_mirred), .size = sizeof(struct tcf_mirred),
.get_dev = tcf_mirred_device,
}; };
static __net_init int mirred_init_net(struct net *net) static __net_init int mirred_init_net(struct net *net)