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-rw-r--r--net/hsr/hsr_device.c183
1 files changed, 141 insertions, 42 deletions
diff --git a/net/hsr/hsr_device.c b/net/hsr/hsr_device.c
index a6f4e9f65b14..ab953a1a0d6c 100644
--- a/net/hsr/hsr_device.c
+++ b/net/hsr/hsr_device.c
@@ -3,9 +3,8 @@
*
* Author(s):
* 2011-2014 Arvid Brodin, arvid.brodin@alten.se
- *
* This file contains device methods for creating, using and destroying
- * virtual HSR devices.
+ * virtual HSR or PRP devices.
*/
#include <linux/netdevice.h>
@@ -210,7 +209,7 @@ static netdev_features_t hsr_fix_features(struct net_device *dev,
return hsr_features_recompute(hsr, features);
}
-static int hsr_dev_xmit(struct sk_buff *skb, struct net_device *dev)
+static netdev_tx_t hsr_dev_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct hsr_priv *hsr = netdev_priv(dev);
struct hsr_port *master;
@@ -231,66 +230,103 @@ static const struct header_ops hsr_header_ops = {
.parse = eth_header_parse,
};
-static void send_hsr_supervision_frame(struct hsr_port *master,
- u8 type, u8 hsr_ver)
+static struct sk_buff *hsr_init_skb(struct hsr_port *master, u16 proto)
{
+ struct hsr_priv *hsr = master->hsr;
struct sk_buff *skb;
int hlen, tlen;
- struct hsr_tag *hsr_tag;
- struct hsr_sup_tag *hsr_stag;
- struct hsr_sup_payload *hsr_sp;
- unsigned long irqflags;
hlen = LL_RESERVED_SPACE(master->dev);
tlen = master->dev->needed_tailroom;
+ /* skb size is same for PRP/HSR frames, only difference
+ * 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) +
sizeof(struct hsr_sup_payload) + hlen + tlen);
if (!skb)
- return;
+ return skb;
skb_reserve(skb, hlen);
-
skb->dev = master->dev;
- skb->protocol = htons(hsr_ver ? ETH_P_HSR : ETH_P_PRP);
+ skb->protocol = htons(proto);
skb->priority = TC_PRIO_CONTROL;
- if (dev_hard_header(skb, skb->dev, (hsr_ver ? ETH_P_HSR : ETH_P_PRP),
- master->hsr->sup_multicast_addr,
+ if (dev_hard_header(skb, skb->dev, proto,
+ hsr->sup_multicast_addr,
skb->dev->dev_addr, skb->len) <= 0)
goto out;
+
skb_reset_mac_header(skb);
skb_reset_network_header(skb);
skb_reset_transport_header(skb);
- if (hsr_ver > 0) {
+ return skb;
+out:
+ kfree_skb(skb);
+
+ return NULL;
+}
+
+static void send_hsr_supervision_frame(struct hsr_port *master,
+ unsigned long *interval)
+{
+ 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) {
+ type = HSR_TLV_ANNOUNCE;
+ *interval = msecs_to_jiffies(HSR_ANNOUNCE_INTERVAL);
+ hsr->announce_count++;
+ }
+
+ if (!hsr->prot_version)
+ proto = ETH_P_PRP;
+ else
+ proto = ETH_P_HSR;
+
+ skb = hsr_init_skb(master, proto);
+ 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_ver ? 0x0 : 0xf));
- set_hsr_stag_HSR_ver(hsr_stag, hsr_ver);
+ set_hsr_stag_path(hsr_stag, (hsr->prot_version ? 0x0 : 0xf));
+ set_hsr_stag_HSR_ver(hsr_stag, hsr->prot_version);
/* From HSRv1 on we have separate supervision sequence numbers. */
spin_lock_irqsave(&master->hsr->seqnr_lock, irqflags);
- if (hsr_ver > 0) {
- hsr_stag->sequence_nr = htons(master->hsr->sup_sequence_nr);
- hsr_tag->sequence_nr = htons(master->hsr->sequence_nr);
- master->hsr->sup_sequence_nr++;
- master->hsr->sequence_nr++;
+ 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(master->hsr->sequence_nr);
- master->hsr->sequence_nr++;
+ hsr_stag->sequence_nr = htons(hsr->sequence_nr);
+ hsr->sequence_nr++;
}
spin_unlock_irqrestore(&master->hsr->seqnr_lock, irqflags);
hsr_stag->HSR_TLV_type = type;
/* TODO: Why 12 in HSRv0? */
- hsr_stag->HSR_TLV_length =
- hsr_ver ? sizeof(struct hsr_sup_payload) : 12;
+ hsr_stag->HSR_TLV_length = hsr->prot_version ?
+ sizeof(struct hsr_sup_payload) : 12;
/* Payload: MacAddressA */
hsr_sp = skb_put(skb, sizeof(struct hsr_sup_payload));
@@ -300,11 +336,57 @@ static void send_hsr_supervision_frame(struct hsr_port *master,
return;
hsr_forward_skb(skb, master);
+
return;
+}
-out:
- WARN_ONCE(1, "HSR: Could not send supervision frame\n");
- kfree_skb(skb);
+static void send_prp_supervision_frame(struct hsr_port *master,
+ unsigned long *interval)
+{
+ struct hsr_priv *hsr = master->hsr;
+ struct hsr_sup_payload *hsr_sp;
+ 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);
+ if (!skb) {
+ WARN_ONCE(1, "PRP: Could not send supervision frame\n");
+ return;
+ }
+
+ *interval = msecs_to_jiffies(HSR_LIFE_CHECK_INTERVAL);
+ 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 ? 1 : 0));
+
+ /* From HSRv1 on we have separate supervision sequence numbers. */
+ spin_lock_irqsave(&master->hsr->seqnr_lock, irqflags);
+ hsr_stag->sequence_nr = htons(hsr->sup_sequence_nr);
+ hsr->sup_sequence_nr++;
+ hsr_stag->HSR_TLV_type = PRP_TLV_LIFE_CHECK_DD;
+ hsr_stag->HSR_TLV_length = sizeof(struct hsr_sup_payload);
+
+ /* Payload: MacAddressA */
+ 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)) {
+ 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);
}
/* Announce (supervision frame) timer function
@@ -319,19 +401,7 @@ static void hsr_announce(struct timer_list *t)
rcu_read_lock();
master = hsr_port_get_hsr(hsr, HSR_PT_MASTER);
-
- if (hsr->announce_count < 3 && hsr->prot_version == 0) {
- send_hsr_supervision_frame(master, HSR_TLV_ANNOUNCE,
- hsr->prot_version);
- hsr->announce_count++;
-
- interval = msecs_to_jiffies(HSR_ANNOUNCE_INTERVAL);
- } else {
- send_hsr_supervision_frame(master, HSR_TLV_LIFE_CHECK,
- hsr->prot_version);
-
- interval = msecs_to_jiffies(HSR_LIFE_CHECK_INTERVAL);
- }
+ hsr->proto_ops->send_sv_frame(master, &interval);
if (is_admin_up(master->dev))
mod_timer(&hsr->announce_timer, jiffies + interval);
@@ -368,6 +438,24 @@ static struct device_type hsr_type = {
.name = "hsr",
};
+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,
+ .invalid_dan_ingress_frame = hsr_invalid_dan_ingress_frame,
+};
+
+static struct hsr_proto_ops prp_ops = {
+ .send_sv_frame = send_prp_supervision_frame,
+ .create_tagged_frame = prp_create_tagged_frame,
+ .get_untagged_frame = prp_get_untagged_frame,
+ .drop_frame = prp_drop_frame,
+ .fill_frame_info = prp_fill_frame_info,
+ .handle_san_frame = prp_handle_san_frame,
+ .update_san_info = prp_update_san_info,
+};
+
void hsr_dev_setup(struct net_device *dev)
{
eth_hw_addr_random(dev);
@@ -427,6 +515,17 @@ int hsr_dev_finalize(struct net_device *hsr_dev, struct net_device *slave[2],
ether_addr_copy(hsr_dev->dev_addr, slave[0]->dev_addr);
+ /* initialize protocol specific functions */
+ if (protocol_version == PRP_V1) {
+ /* For PRP, lan_id has most significant 3 bits holding
+ * the net_id of PRP_LAN_ID
+ */
+ hsr->net_id = PRP_LAN_ID << 1;
+ hsr->proto_ops = &prp_ops;
+ } else {
+ hsr->proto_ops = &hsr_ops;
+ }
+
/* Make sure we recognize frames from ourselves in hsr_rcv() */
res = hsr_create_self_node(hsr, hsr_dev->dev_addr,
slave[1]->dev_addr);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-24 17:24:07 +0100