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authorMurali Karicheri <m-karicheri2@ti.com>2020-07-22 10:40:18 -0400
committerDavid S. Miller <davem@davemloft.net>2020-07-27 12:20:40 -0700
commit28e458e097f32af4f89f02e078a6d6b4ea7a52ed (patch)
tree77e4b61fcb34a537551c17b09a9af5deb79b5d18
parent121c33b07b3127f501b366bc23d2a590e2f2b8ef (diff)
net: hsr: introduce protocol specific function pointers
As a preparatory patch to introduce support for PRP protocol, add a protocol ops ptr in the private hsr structure to hold function pointers as some of the functions at protocol level packet handling is different for HSR vs PRP. It is expected that PRP will add its of set of functions for protocol handling. Modify existing hsr_announce() function to call proto_ops->send_sv_frame() to send supervision frame for HSR. This is expected to be different for PRP. So introduce a ops function ptr, send_sv_frame() for the same and initialize it to send_hsr_supervsion_frame(). Modify hsr_announce() to call proto_ops->send_sv_frame(). Signed-off-by: Murali Karicheri <m-karicheri2@ti.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/hsr/hsr_device.c70
-rw-r--r--net/hsr/hsr_main.h6
2 files changed, 45 insertions, 31 deletions
diff --git a/net/hsr/hsr_device.c b/net/hsr/hsr_device.c
index bfe2d1449dbd..006e715eccb6 100644
--- a/net/hsr/hsr_device.c
+++ b/net/hsr/hsr_device.c
@@ -230,7 +230,7 @@ static const struct header_ops hsr_header_ops = {
.parse = eth_header_parse,
};
-static struct sk_buff *hsr_init_skb(struct hsr_port *master, 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;
@@ -247,10 +247,10 @@ static struct sk_buff *hsr_init_skb(struct hsr_port *master, u8 hsr_ver)
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),
+ if (dev_hard_header(skb, skb->dev, proto,
hsr->sup_multicast_addr,
skb->dev->dev_addr, skb->len) <= 0)
goto out;
@@ -267,47 +267,62 @@ out:
}
static void send_hsr_supervision_frame(struct hsr_port *master,
- u8 type, u8 hsr_ver)
+ 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;
- struct hsr_tag *hsr_tag;
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, hsr_ver);
+ skb = hsr_init_skb(master, proto);
if (!skb) {
WARN_ONCE(1, "HSR: Could not send supervision frame\n");
return;
}
- if (hsr_ver > 0) {
+ 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));
@@ -333,19 +348,7 @@ 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);
@@ -382,6 +385,10 @@ static struct device_type hsr_type = {
.name = "hsr",
};
+static struct hsr_proto_ops hsr_ops = {
+ .send_sv_frame = send_hsr_supervision_frame,
+};
+
void hsr_dev_setup(struct net_device *dev)
{
eth_hw_addr_random(dev);
@@ -445,6 +452,7 @@ int hsr_dev_finalize(struct net_device *hsr_dev, struct net_device *slave[2],
if (protocol_version == PRP_V1)
return -EPROTONOSUPPORT;
+ 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);
diff --git a/net/hsr/hsr_main.h b/net/hsr/hsr_main.h
index 8cf10d67d5f9..671270115a50 100644
--- a/net/hsr/hsr_main.h
+++ b/net/hsr/hsr_main.h
@@ -140,6 +140,11 @@ enum hsr_version {
PRP_V1,
};
+struct hsr_proto_ops {
+ /* format and send supervision frame */
+ void (*send_sv_frame)(struct hsr_port *port, unsigned long *interval);
+};
+
struct hsr_priv {
struct rcu_head rcu_head;
struct list_head ports;
@@ -153,6 +158,7 @@ struct hsr_priv {
enum hsr_version prot_version; /* Indicate if HSRv0, HSRv1 or PRPv1 */
spinlock_t seqnr_lock; /* locking for sequence_nr */
spinlock_t list_lock; /* locking for node list */
+ struct hsr_proto_ops *proto_ops;
unsigned char sup_multicast_addr[ETH_ALEN];
#ifdef CONFIG_DEBUG_FS
struct dentry *node_tbl_root;