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Date: Fri, 21 Nov 2014 14:49:30 -0800
From: roopa@...ulusnetworks.com
To: jiri@...nulli.us, sfeldma@...il.com, jhs@...atatu.com,
bcrl@...ck.org, tgraf@...g.ch, john.fastabend@...il.com,
stephen@...workplumber.org, linville@...driver.com,
nhorman@...driver.com, nicolas.dichtel@...nd.com,
vyasevic@...hat.com, f.fainelli@...il.com, buytenh@...tstofly.org,
aviadr@...lanox.com
Cc: netdev@...r.kernel.org, davem@...emloft.net,
shrijeet@...ulusnetworks.com, gospo@...ulusnetworks.com,
Roopa Prabhu <roopa@...ulusnetworks.com>
Subject: [RFC PATCH 4/4] bridge: make hw offload conditional on bridge and bridge port offload flags
From: Roopa Prabhu <roopa@...ulusnetworks.com>
If bridge has NETIF_F_HW_OFFLOAD feature flag set, offload all bridge and
bridge port attributes to hardware.
Two new flags BRPORT_KERNEL and BRPORT_HW_OFFLOAD to control offloading of
a few bridge port flags to hardware. These can be encoded in the upper bits
of all bridge port flag netlink attributes.
Control/Override bridge port flag (learning, flooding etc) offloading
with BRPORT_KERNEL and BRPORT_HW_OFFLOAD flags:
If the brport offload flags are not present (current default)
- set bridge port flag attribute only in the kernel
else:
if BRPORT_KERNEL and BRPORT_HW_OFFLOAD:
- set bridge port flag both in kernel and hw
elif BRPORT_KERNEL:
- set bridge port flag attribute only in kernel
elif BRPORT_HW_OFFLOAD:
- set bridge port flag attribute only in hw
The 'gets' needs more work. The idea is that the gets can also be controlled
by the KERNEL or HW_OFFLOAD flags.
Signed-off-by: Roopa Prabhu <roopa@...ulusnetworks.com>
---
net/bridge/br_netlink.c | 50 +++++++++++++++++++++++++++++++++++++----------
net/bridge/br_private.h | 2 ++
net/bridge/br_stp.c | 9 ++++++---
net/bridge/br_stp_if.c | 8 ++++++--
4 files changed, 54 insertions(+), 15 deletions(-)
diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c
index 13fecf1..e92e810 100644
--- a/net/bridge/br_netlink.c
+++ b/net/bridge/br_netlink.c
@@ -57,12 +57,19 @@ static int br_port_fill_attrs(struct sk_buff *skb,
nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) ||
nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) ||
nla_put_u8(skb, IFLA_BRPORT_MODE, mode) ||
- nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) ||
- nla_put_u8(skb, IFLA_BRPORT_PROTECT, !!(p->flags & BR_ROOT_BLOCK)) ||
- nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE, !!(p->flags & BR_MULTICAST_FAST_LEAVE)) ||
- nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) ||
- nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD, !!(p->flags & BR_FLOOD)) ||
- nla_put_u8(skb, IFLA_BRPORT_PROXYARP, !!(p->flags & BR_PROXYARP)))
+ nla_put_u8(skb, IFLA_BRPORT_GUARD,
+ br_get_port_flag(p, IFLA_BRPORT_GUARD, BR_BPDU_GUARD)) ||
+ nla_put_u8(skb, IFLA_BRPORT_PROTECT,
+ br_get_port_flag(p, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK)) ||
+ nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE,
+ br_get_port_flag(p, IFLA_BRPORT_FAST_LEAVE,
+ BR_MULTICAST_FAST_LEAVE)) ||
+ nla_put_u8(skb, IFLA_BRPORT_LEARNING,
+ br_get_port_flag(p, IFLA_BRPORT_LEARNING, BR_LEARNING)) ||
+ nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD,
+ br_get_port_flag(p, IFLA_UNICAST_FLOOD, BR_FLOOD)) ||
+ nla_put_u8(skb, IFLA_BRPORT_PROXYARP,
+ br_get_port_flag(p, IFLA_UNICAST_FLOOD, BR_PROXYARP)))
return -EMSGSIZE;
return 0;
@@ -305,7 +312,9 @@ static int br_set_port_state(struct net_bridge_port *p, u8 state)
br_set_state(p, state);
br_log_state(p);
- netdev_sw_port_stp_update(p->dev, p->state);
+
+ if (BR_HW_OFFLOAD(p->br))
+ netdev_sw_port_set_attr(p->dev, IFLA_BRPORT_STATE, &p->state);
br_port_state_selection(p->br);
return 0;
}
@@ -316,13 +325,34 @@ static void br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[],
{
if (tb[attrtype]) {
u8 flag = nla_get_u8(tb[attrtype]);
- if (flag)
- p->flags |= mask;
- else
+ if (flag) {
+ flag_upper = flag & 0xf0
+ if (!flag_upper || (flag_upper & BRPORT_KERNEL))
+ p->flags |= mask;
+ if ((flag_upper & BRPORT_HW_OFFLOAD) ||
+ (BR_HW_OFFLOAD(p->br)))
+ /* Also set the port flag in hw */
+ netdev_sw_port_set_attr(p->dev, attrtype, 1);
+ } else {
p->flags &= ~mask;
+ if (BR_HW_OFFLOAD(p->br))
+ netdev_sw_port_set_attr(p->dev, attrtype, 0);
+ }
}
}
+/* Set/clear or port flags based on attribute */
+static u8 br_get_port_flag(struct net_bridge_port *p,
+ int attrtype, u8 flag)
+{
+ attrvalue = !!(p->flags & flag)
+ if (attrvalue)
+ attrvalue |= BRPORT_KERNEL
+ if (netdev_sw_port_get_flag(p->dev, attrtype))
+ attrvalue |= BRPORT_HW_OFFLOAD
+ return attrvalue;
+}
+
/* Process bridge protocol info on port */
static int br_setport(struct net_bridge_port *p, struct nlattr *tb[])
{
diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index 8f3f081..3ebd196 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -41,6 +41,8 @@
/* Path to usermode spanning tree program */
#define BR_STP_PROG "/sbin/bridge-stp"
+#define BR_HW_OFFLOAD(br) !!(br->dev->features & NETIF_F_HW_OFFLOAD)
+
typedef struct bridge_id bridge_id;
typedef struct mac_addr mac_addr;
typedef __u16 port_id;
diff --git a/net/bridge/br_stp.c b/net/bridge/br_stp.c
index c00139b..bb61dc0 100644
--- a/net/bridge/br_stp.c
+++ b/net/bridge/br_stp.c
@@ -115,7 +115,8 @@ static void br_root_port_block(const struct net_bridge *br,
br_set_state(p, BR_STATE_LISTENING);
br_log_state(p);
- netdev_sw_port_stp_update(p->dev, p->state);
+ if (BR_HW_OFFLOAD(p->br))
+ netdev_sw_port_set_attr(p->dev, IFLA_BRPORT_STATE, &p->state);
br_ifinfo_notify(RTM_NEWLINK, p);
if (br->forward_delay > 0)
@@ -396,7 +397,8 @@ static void br_make_blocking(struct net_bridge_port *p)
br_set_state(p, BR_STATE_BLOCKING);
br_log_state(p);
- netdev_sw_port_stp_update(p->dev, p->state);
+ if (BR__HW_OFFLOAD(p->br))
+ netdev_sw_port_set_attr(p->dev, IFLA_BRPORT_STATE, &p->state);
br_ifinfo_notify(RTM_NEWLINK, p);
del_timer(&p->forward_delay_timer);
@@ -422,7 +424,8 @@ static void br_make_forwarding(struct net_bridge_port *p)
br_multicast_enable_port(p);
br_log_state(p);
- netdev_sw_port_stp_update(p->dev, p->state);
+ if (BR_OFFLOAD(p->br))
+ netdev_sw_port_set_attr(p->dev, IFLA_BRPORT_STATE, &p->state);
br_ifinfo_notify(RTM_NEWLINK, p);
if (br->forward_delay != 0)
diff --git a/net/bridge/br_stp_if.c b/net/bridge/br_stp_if.c
index 91279f8..8435b4d 100644
--- a/net/bridge/br_stp_if.c
+++ b/net/bridge/br_stp_if.c
@@ -90,7 +90,8 @@ void br_stp_enable_port(struct net_bridge_port *p)
br_init_port(p);
br_port_state_selection(p->br);
br_log_state(p);
- netdev_sw_port_stp_update(p->dev, p->state);
+ if (BR_HW_OFFLOAD(p->br))
+ netdev_sw_port_set_attr(p->dev, IFLA_BRPORT_STATE, &p->state);
br_ifinfo_notify(RTM_NEWLINK, p);
}
@@ -107,7 +108,8 @@ void br_stp_disable_port(struct net_bridge_port *p)
p->config_pending = 0;
br_log_state(p);
- netdev_sw_port_stp_update(p->dev, p->state);
+ if (BR_HW_OFFLOAD(p->br))
+ netdev_sw_port_set_attr(p->dev, IFLA_BRPORT_STATE, &p->state);
br_ifinfo_notify(RTM_NEWLINK, p);
del_timer(&p->message_age_timer);
@@ -290,6 +292,8 @@ int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio)
br_become_designated_port(p);
br_port_state_selection(p->br);
}
+ if (BR_HW_OFFLOAD(p->br))
+ netdev_sw_port_set_attr(p->dev, IFLA_BRPORT_PRIORITY, &newprio)
return 0;
}
--
1.7.10.4
--
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