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Date: Wed, 22 Jul 2020 10:40:20 -0400
From: Murali Karicheri <m-karicheri2@...com>
To: <davem@...emloft.net>, <kuba@...nel.org>, <netdev@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <linux-api@...r.kernel.org>,
<nsekhar@...com>, <grygorii.strashko@...com>,
<vinicius.gomes@...el.com>
Subject: [net-next v5 PATCH 5/7] net: hsr: define and use proto_ops ptrs to handle hsr specific frames
As a preparatory patch to introduce PRP, refactor the code specific to
handling HSR frames into separate functions and call them through
proto_ops function pointers.
Signed-off-by: Murali Karicheri <m-karicheri2@...com>
---
net/hsr/hsr_device.c | 5 +++-
net/hsr/hsr_forward.c | 63 +++++++++++++++++++++++++------------------
net/hsr/hsr_forward.h | 7 ++++-
net/hsr/hsr_main.h | 8 ++++++
4 files changed, 55 insertions(+), 28 deletions(-)
diff --git a/net/hsr/hsr_device.c b/net/hsr/hsr_device.c
index 74eaf28743a4..022393bed40a 100644
--- a/net/hsr/hsr_device.c
+++ b/net/hsr/hsr_device.c
@@ -440,9 +440,12 @@ static struct device_type hsr_type = {
static struct hsr_proto_ops hsr_ops = {
.send_sv_frame = send_hsr_supervision_frame,
+ .create_tagged_frame = hsr_create_tagged_frame,
+ .get_untagged_frame = hsr_get_untagged_frame,
+ .fill_frame_info = hsr_fill_frame_info,
};
-struct hsr_proto_ops prp_ops = {
+static struct hsr_proto_ops prp_ops = {
.send_sv_frame = send_prp_supervision_frame,
};
diff --git a/net/hsr/hsr_forward.c b/net/hsr/hsr_forward.c
index dedf8ac6f992..33e8136891bc 100644
--- a/net/hsr/hsr_forward.c
+++ b/net/hsr/hsr_forward.c
@@ -116,8 +116,8 @@ static struct sk_buff *create_stripped_skb(struct sk_buff *skb_in,
return skb;
}
-static struct sk_buff *frame_get_stripped_skb(struct hsr_frame_info *frame,
- struct hsr_port *port)
+struct sk_buff *hsr_get_untagged_frame(struct hsr_frame_info *frame,
+ struct hsr_port *port)
{
if (!frame->skb_std)
frame->skb_std = create_stripped_skb(frame->skb_hsr, frame);
@@ -192,8 +192,8 @@ static struct sk_buff *create_tagged_skb(struct sk_buff *skb_o,
/* If the original frame was an HSR tagged frame, just clone it to be sent
* unchanged. Otherwise, create a private frame especially tagged for 'port'.
*/
-static struct sk_buff *frame_get_tagged_skb(struct hsr_frame_info *frame,
- struct hsr_port *port)
+struct sk_buff *hsr_create_tagged_frame(struct hsr_frame_info *frame,
+ struct hsr_port *port)
{
if (frame->skb_hsr)
return skb_clone(frame->skb_hsr, GFP_ATOMIC);
@@ -257,6 +257,7 @@ static void hsr_forward_do(struct hsr_frame_info *frame)
struct sk_buff *skb;
hsr_for_each_port(frame->port_rcv->hsr, port) {
+ struct hsr_priv *hsr = port->hsr;
/* Don't send frame back the way it came */
if (port == frame->port_rcv)
continue;
@@ -282,9 +283,10 @@ static void hsr_forward_do(struct hsr_frame_info *frame)
}
if (port->type != HSR_PT_MASTER)
- skb = frame_get_tagged_skb(frame, port);
+ skb = hsr->proto_ops->create_tagged_frame(frame, port);
else
- skb = frame_get_stripped_skb(frame, port);
+ skb = hsr->proto_ops->get_untagged_frame(frame, port);
+
if (!skb) {
/* FIXME: Record the dropped frame? */
continue;
@@ -317,12 +319,34 @@ static void check_local_dest(struct hsr_priv *hsr, struct sk_buff *skb,
}
}
-static int hsr_fill_frame_info(struct hsr_frame_info *frame,
- struct sk_buff *skb, struct hsr_port *port)
+void hsr_fill_frame_info(__be16 proto, struct sk_buff *skb,
+ struct hsr_frame_info *frame)
{
- struct ethhdr *ethhdr;
+ struct hsr_priv *hsr = frame->port_rcv->hsr;
unsigned long irqflags;
+ if (proto == htons(ETH_P_PRP) || proto == htons(ETH_P_HSR)) {
+ frame->skb_std = NULL;
+ frame->skb_hsr = skb;
+ frame->sequence_nr = hsr_get_skb_sequence_nr(skb);
+ } else {
+ frame->skb_std = skb;
+ frame->skb_hsr = NULL;
+ /* Sequence nr for the master node */
+ spin_lock_irqsave(&hsr->seqnr_lock, irqflags);
+ frame->sequence_nr = hsr->sequence_nr;
+ hsr->sequence_nr++;
+ spin_unlock_irqrestore(&hsr->seqnr_lock, irqflags);
+ }
+}
+
+static int fill_frame_info(struct hsr_frame_info *frame,
+ struct sk_buff *skb, struct hsr_port *port)
+{
+ struct hsr_priv *hsr = port->hsr;
+ struct ethhdr *ethhdr;
+ __be16 proto;
+
frame->is_supervision = is_supervision_frame(port->hsr, skb);
frame->node_src = hsr_get_node(port, skb, frame->is_supervision);
if (!frame->node_src)
@@ -335,23 +359,10 @@ static int hsr_fill_frame_info(struct hsr_frame_info *frame,
/* FIXME: */
netdev_warn_once(skb->dev, "VLAN not yet supported");
}
- if (ethhdr->h_proto == htons(ETH_P_PRP) ||
- ethhdr->h_proto == htons(ETH_P_HSR)) {
- frame->skb_std = NULL;
- frame->skb_hsr = skb;
- frame->sequence_nr = hsr_get_skb_sequence_nr(skb);
- } else {
- frame->skb_std = skb;
- frame->skb_hsr = NULL;
- /* Sequence nr for the master node */
- spin_lock_irqsave(&port->hsr->seqnr_lock, irqflags);
- frame->sequence_nr = port->hsr->sequence_nr;
- port->hsr->sequence_nr++;
- spin_unlock_irqrestore(&port->hsr->seqnr_lock, irqflags);
- }
-
+ proto = ethhdr->h_proto;
frame->port_rcv = port;
- check_local_dest(port->hsr, skb, frame);
+ hsr->proto_ops->fill_frame_info(proto, skb, frame);
+ check_local_dest(hsr, skb, frame);
return 0;
}
@@ -367,7 +378,7 @@ void hsr_forward_skb(struct sk_buff *skb, struct hsr_port *port)
goto out_drop;
}
- if (hsr_fill_frame_info(&frame, skb, port) < 0)
+ if (fill_frame_info(&frame, skb, port) < 0)
goto out_drop;
hsr_register_frame_in(frame.node_src, port, frame.sequence_nr);
hsr_forward_do(&frame);
diff --git a/net/hsr/hsr_forward.h b/net/hsr/hsr_forward.h
index b2a6fa319d94..893207792d56 100644
--- a/net/hsr/hsr_forward.h
+++ b/net/hsr/hsr_forward.h
@@ -14,5 +14,10 @@
#include "hsr_main.h"
void hsr_forward_skb(struct sk_buff *skb, struct hsr_port *port);
-
+struct sk_buff *hsr_create_tagged_frame(struct hsr_frame_info *frame,
+ struct hsr_port *port);
+struct sk_buff *hsr_get_untagged_frame(struct hsr_frame_info *frame,
+ struct hsr_port *port);
+void hsr_fill_frame_info(__be16 proto, struct sk_buff *skb,
+ struct hsr_frame_info *frame);
#endif /* __HSR_FORWARD_H */
diff --git a/net/hsr/hsr_main.h b/net/hsr/hsr_main.h
index 58e1ad21b66f..14f442c57a84 100644
--- a/net/hsr/hsr_main.h
+++ b/net/hsr/hsr_main.h
@@ -162,9 +162,17 @@ enum hsr_version {
PRP_V1,
};
+struct hsr_frame_info;
+
struct hsr_proto_ops {
/* format and send supervision frame */
void (*send_sv_frame)(struct hsr_port *port, unsigned long *interval);
+ struct sk_buff * (*get_untagged_frame)(struct hsr_frame_info *frame,
+ struct hsr_port *port);
+ struct sk_buff * (*create_tagged_frame)(struct hsr_frame_info *frame,
+ struct hsr_port *port);
+ void (*fill_frame_info)(__be16 proto, struct sk_buff *skb,
+ struct hsr_frame_info *frame);
};
struct hsr_priv {
--
2.17.1
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