From: George McCollister <george.mccollister@xxxxxxxxx>
[ Upstream commit 78be9217c4014cebac4d549cc2db1f2886d5a8fb ]
For a switch to offload insertion of HSR/PRP tags, frames must not be
sent to the CPU facing switch port with a tag. Generate supervision frames
(eth type ETH_P_PRP) without HSR v1 (ETH_P_HSR)/PRP tag and rely on
create_tagged_frame which inserts it later. This will allow skipping the
tag insertion for all outgoing frames in the future which is required for
HSR v1/PRP tag insertions to be offloaded.
HSR v0 supervision frames always contain tag information so insertion of
the tag can't be offloaded. IEC 62439-3 Ed.2.0 (HSR v1) specifically
notes that this was changed since v0 to allow offloading.
Signed-off-by: George McCollister <george.mccollister@xxxxxxxxx>
Reviewed-by: Vladimir Oltean <olteanv@xxxxxxxxx>
Tested-by: Vladimir Oltean <olteanv@xxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Stable-dep-of: d5c7652eb16f ("hsr: Disable netpoll.")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
net/hsr/hsr_device.c | 39 +++++++--------------------------------
net/hsr/hsr_forward.c | 8 +++++++-
2 files changed, 14 insertions(+), 33 deletions(-)
diff --git a/net/hsr/hsr_device.c b/net/hsr/hsr_device.c
index fec1b014c0a2..7449c3c95317 100644
--- a/net/hsr/hsr_device.c
+++ b/net/hsr/hsr_device.c
@@ -232,7 +232,7 @@ static const struct header_ops hsr_header_ops = {
.parse = eth_header_parse,
};
-static struct sk_buff *hsr_init_skb(struct hsr_port *master, u16 proto)
+static struct sk_buff *hsr_init_skb(struct hsr_port *master)
{
struct hsr_priv *hsr = master->hsr;
struct sk_buff *skb;
@@ -244,8 +244,7 @@ static struct sk_buff *hsr_init_skb(struct hsr_port *master, u16 proto)
* being, for PRP it is a trailer and for HSR it is a
* header
*/
- skb = dev_alloc_skb(sizeof(struct hsr_tag) +
- sizeof(struct hsr_sup_tag) +
+ skb = dev_alloc_skb(sizeof(struct hsr_sup_tag) +
sizeof(struct hsr_sup_payload) + hlen + tlen);
if (!skb)
@@ -253,10 +252,9 @@ static struct sk_buff *hsr_init_skb(struct hsr_port *master, u16 proto)
skb_reserve(skb, hlen);
skb->dev = master->dev;
- skb->protocol = htons(proto);
skb->priority = TC_PRIO_CONTROL;
- if (dev_hard_header(skb, skb->dev, proto,
+ if (dev_hard_header(skb, skb->dev, ETH_P_PRP,
hsr->sup_multicast_addr,
skb->dev->dev_addr, skb->len) <= 0)
goto out;
@@ -278,12 +276,10 @@ static void send_hsr_supervision_frame(struct hsr_port *master,
{
struct hsr_priv *hsr = master->hsr;
__u8 type = HSR_TLV_LIFE_CHECK;
- struct hsr_tag *hsr_tag = NULL;
struct hsr_sup_payload *hsr_sp;
struct hsr_sup_tag *hsr_stag;
unsigned long irqflags;
struct sk_buff *skb;
- u16 proto;
*interval = msecs_to_jiffies(HSR_LIFE_CHECK_INTERVAL);
if (hsr->announce_count < 3 && hsr->prot_version == 0) {
@@ -292,23 +288,12 @@ static void send_hsr_supervision_frame(struct hsr_port *master,
hsr->announce_count++;
}
- if (!hsr->prot_version)
- proto = ETH_P_PRP;
- else
- proto = ETH_P_HSR;
-
- skb = hsr_init_skb(master, proto);
+ skb = hsr_init_skb(master);
if (!skb) {
WARN_ONCE(1, "HSR: Could not send supervision frame\n");
return;
}
- if (hsr->prot_version > 0) {
- hsr_tag = skb_put(skb, sizeof(struct hsr_tag));
- hsr_tag->encap_proto = htons(ETH_P_PRP);
- set_hsr_tag_LSDU_size(hsr_tag, HSR_V1_SUP_LSDUSIZE);
- }
-
hsr_stag = skb_put(skb, sizeof(struct hsr_sup_tag));
set_hsr_stag_path(hsr_stag, (hsr->prot_version ? 0x0 : 0xf));
set_hsr_stag_HSR_ver(hsr_stag, hsr->prot_version);
@@ -318,8 +303,6 @@ static void send_hsr_supervision_frame(struct hsr_port *master,
if (hsr->prot_version > 0) {
hsr_stag->sequence_nr = htons(hsr->sup_sequence_nr);
hsr->sup_sequence_nr++;
- hsr_tag->sequence_nr = htons(hsr->sequence_nr);
- hsr->sequence_nr++;
} else {
hsr_stag->sequence_nr = htons(hsr->sequence_nr);
hsr->sequence_nr++;
@@ -335,7 +318,7 @@ static void send_hsr_supervision_frame(struct hsr_port *master,
hsr_sp = skb_put(skb, sizeof(struct hsr_sup_payload));
ether_addr_copy(hsr_sp->macaddress_A, master->dev->dev_addr);
- if (skb_put_padto(skb, ETH_ZLEN + HSR_HLEN))
+ if (skb_put_padto(skb, ETH_ZLEN))
return;
hsr_forward_skb(skb, master);
@@ -351,10 +334,8 @@ static void send_prp_supervision_frame(struct hsr_port *master,
struct hsr_sup_tag *hsr_stag;
unsigned long irqflags;
struct sk_buff *skb;
- struct prp_rct *rct;
- u8 *tail;
- skb = hsr_init_skb(master, ETH_P_PRP);
+ skb = hsr_init_skb(master);
if (!skb) {
WARN_ONCE(1, "PRP: Could not send supervision frame\n");
return;
@@ -376,17 +357,11 @@ static void send_prp_supervision_frame(struct hsr_port *master,
hsr_sp = skb_put(skb, sizeof(struct hsr_sup_payload));
ether_addr_copy(hsr_sp->macaddress_A, master->dev->dev_addr);
- if (skb_put_padto(skb, ETH_ZLEN + HSR_HLEN)) {
+ if (skb_put_padto(skb, ETH_ZLEN)) {
spin_unlock_irqrestore(&master->hsr->seqnr_lock, irqflags);
return;
}
- tail = skb_tail_pointer(skb) - HSR_HLEN;
- rct = (struct prp_rct *)tail;
- rct->PRP_suffix = htons(ETH_P_PRP);
- set_prp_LSDU_size(rct, HSR_V1_SUP_LSDUSIZE);
- rct->sequence_nr = htons(hsr->sequence_nr);
- hsr->sequence_nr++;
spin_unlock_irqrestore(&master->hsr->seqnr_lock, irqflags);
hsr_forward_skb(skb, master);
diff --git a/net/hsr/hsr_forward.c b/net/hsr/hsr_forward.c
index 90b0ed16552b..15653d3bb6ac 100644
--- a/net/hsr/hsr_forward.c
+++ b/net/hsr/hsr_forward.c
@@ -186,6 +186,7 @@ static struct sk_buff *prp_fill_rct(struct sk_buff *skb,
set_prp_LSDU_size(trailer, lsdu_size);
trailer->sequence_nr = htons(frame->sequence_nr);
trailer->PRP_suffix = htons(ETH_P_PRP);
+ skb->protocol = eth_hdr(skb)->h_proto;
return skb;
}
@@ -226,6 +227,7 @@ static struct sk_buff *hsr_fill_tag(struct sk_buff *skb,
hsr_ethhdr->hsr_tag.encap_proto = hsr_ethhdr->ethhdr.h_proto;
hsr_ethhdr->ethhdr.h_proto = htons(proto_version ?
ETH_P_HSR : ETH_P_PRP);
+ skb->protocol = hsr_ethhdr->ethhdr.h_proto;
return skb;
}
@@ -455,7 +457,11 @@ static void handle_std_frame(struct sk_buff *skb,
int hsr_fill_frame_info(__be16 proto, struct sk_buff *skb,
struct hsr_frame_info *frame)
{
- if (proto == htons(ETH_P_PRP) ||
+ struct hsr_port *port = frame->port_rcv;
+ struct hsr_priv *hsr = port->hsr;
+
+ /* HSRv0 supervisory frames double as a tag so treat them as tagged. */
+ if ((!hsr->prot_version && proto == htons(ETH_P_PRP)) ||
proto == htons(ETH_P_HSR)) {
/* Check if skb contains hsr_ethhdr */
if (skb->mac_len < sizeof(struct hsr_ethhdr))
--
2.35.1
