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net: hsr: Provide RedBox support (HSR-SAN)

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Introduce RedBox support (HSR-SAN to be more precise) for HSR networks.
Following traffic reduction optimizations have been implemented:
- Do not send HSR supervisory frames to Port C (interlink)
- Do not forward to HSR ring frames addressed to Port C
- Do not forward to Port C frames from HSR ring
- Do not send duplicate HSR frame to HSR ring when destination is Port C

The corresponding patch to modify iptable2 sources has already been sent:
https://lore.kernel.org/netdev/20240308145729.490863-1-lukma@denx.de/T/

Testing procedure (veth and netns):
-----------------------------------
One shall run:
linux-vanila/tools/testing/selftests/net/hsr/hsr_redbox.sh
(Detailed description of the setup one can find in the test
script file).

Testing procedure (real hardware):
----------------------------------
The EVB-KSZ9477 has been used for testing on net-next branch
(SHA1: 5fc68320c1).

Ports 4/5 were used for SW managed HSR (hsr1) as first hsr0 for ports 1/2
(with HW offloading for ksz9477) was created. Port 3 has been used as
interlink port (single USB-ETH dongle).

Configuration - RedBox (EVB-KSZ9477):
if link set lan1 down;ip link set lan2 down
ip link add name hsr0 type hsr slave1 lan1 slave2 lan2 supervision 45 version 1
ip link add name hsr1 type hsr slave1 lan4 slave2 lan5 interlink lan3 supervision 45 version 1
ip link set lan4 up;ip link set lan5 up
ip link set lan3 up
ip addr add 192.168.0.11/24 dev hsr1
ip link set hsr1 up

Configuration - DAN-H (EVB-KSZ9477):

ip link set lan1 down;ip link set lan2 down
ip link add name hsr0 type hsr slave1 lan1 slave2 lan2 supervision 45 version 1
ip link add name hsr1 type hsr slave1 lan4 slave2 lan5 supervision 45 version 1
ip link set lan4 up;ip link set lan5 up
ip addr add 192.168.0.12/24 dev hsr1
ip link set hsr1 up

This approach uses only SW based HSR devices (hsr1).

--------------          -----------------       ------------
DAN-H  Port5 | <------> | Port5         |       |
       Port4 | <------> | Port4   Port3 | <---> | PC
             |          | (RedBox)      |       | (USB-ETH)
EVB-KSZ9477  |          | EVB-KSZ9477   |       |
--------------          -----------------       ------------

Signed-off-by: Lukasz Majewski <lukma@denx.de>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Lukasz Majewski 2024-04-23 14:49:04 +02:00 committed by Paolo Abeni
parent af0cb3fa3f
commit 5055cccfc2
9 changed files with 204 additions and 16 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

1
include/uapi/linux/if_link.h
View file

@ -1771,6 +1771,7 @@ enum {
IFLA_HSR_PROTOCOL, /* Indicate different protocol than
* HSR. For example PRP.
*/
IFLA_HSR_INTERLINK, /* HSR interlink network device */
__IFLA_HSR_MAX,
};

36
net/hsr/hsr_device.c
View file

@ -146,6 +146,9 @@ static int hsr_dev_open(struct net_device *dev)
case HSR_PT_SLAVE_B:
designation = "Slave B";
break;
case HSR_PT_INTERLINK:
designation = "Interlink";
break;
default:
designation = "Unknown";
}
@ -285,6 +288,7 @@ static void send_hsr_supervision_frame(struct hsr_port *master,
struct hsr_priv *hsr = master->hsr;
__u8 type = HSR_TLV_LIFE_CHECK;
struct hsr_sup_payload *hsr_sp;
struct hsr_sup_tlv *hsr_stlv;
struct hsr_sup_tag *hsr_stag;
struct sk_buff *skb;
@ -324,6 +328,16 @@ 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 (hsr->redbox) {
hsr_stlv = skb_put(skb, sizeof(struct hsr_sup_tlv));
hsr_stlv->HSR_TLV_type = PRP_TLV_REDBOX_MAC;
hsr_stlv->HSR_TLV_length = sizeof(struct hsr_sup_payload);
/* Payload: MacAddressRedBox */
hsr_sp = skb_put(skb, sizeof(struct hsr_sup_payload));
ether_addr_copy(hsr_sp->macaddress_A, hsr->macaddress_redbox);
}
if (skb_put_padto(skb, ETH_ZLEN)) {
spin_unlock_bh(&hsr->seqnr_lock);
return;
@ -405,6 +419,10 @@ void hsr_del_ports(struct hsr_priv *hsr)
if (port)
hsr_del_port(port);
port = hsr_port_get_hsr(hsr, HSR_PT_INTERLINK);
if (port)
hsr_del_port(port);
port = hsr_port_get_hsr(hsr, HSR_PT_MASTER);
if (port)
hsr_del_port(port);
@ -534,8 +552,8 @@ static const unsigned char def_multicast_addr[ETH_ALEN] __aligned(2) = {
};
int hsr_dev_finalize(struct net_device *hsr_dev, struct net_device *slave[2],
unsigned char multicast_spec, u8 protocol_version,
struct netlink_ext_ack *extack)
struct net_device *interlink, unsigned char multicast_spec,
u8 protocol_version, struct netlink_ext_ack *extack)
{
bool unregister = false;
struct hsr_priv *hsr;
@ -544,6 +562,7 @@ int hsr_dev_finalize(struct net_device *hsr_dev, struct net_device *slave[2],
hsr = netdev_priv(hsr_dev);
INIT_LIST_HEAD(&hsr->ports);
INIT_LIST_HEAD(&hsr->node_db);
INIT_LIST_HEAD(&hsr->proxy_node_db);
spin_lock_init(&hsr->list_lock);
eth_hw_addr_set(hsr_dev, slave[0]->dev_addr);
@ -569,6 +588,7 @@ int hsr_dev_finalize(struct net_device *hsr_dev, struct net_device *slave[2],
/* Overflow soon to find bugs easier: */
hsr->sequence_nr = HSR_SEQNR_START;
hsr->sup_sequence_nr = HSR_SUP_SEQNR_START;
hsr->interlink_sequence_nr = HSR_SEQNR_START;
timer_setup(&hsr->announce_timer, hsr_announce, 0);
timer_setup(&hsr->prune_timer, hsr_prune_nodes, 0);
@ -604,6 +624,18 @@ int hsr_dev_finalize(struct net_device *hsr_dev, struct net_device *slave[2],
if (res)
goto err_unregister;
if (interlink) {
res = hsr_add_port(hsr, interlink, HSR_PT_INTERLINK, extack);
if (res)
goto err_unregister;
hsr->redbox = true;
ether_addr_copy(hsr->macaddress_redbox, interlink->dev_addr);
timer_setup(&hsr->prune_proxy_timer, hsr_prune_proxy_nodes, 0);
mod_timer(&hsr->prune_proxy_timer,
jiffies + msecs_to_jiffies(PRUNE_PROXY_PERIOD));
}
hsr_debugfs_init(hsr, hsr_dev);
mod_timer(&hsr->prune_timer, jiffies + msecs_to_jiffies(PRUNE_PERIOD));

4
net/hsr/hsr_device.h
View file

@ -16,8 +16,8 @@
void hsr_del_ports(struct hsr_priv *hsr);
void hsr_dev_setup(struct net_device *dev);
int hsr_dev_finalize(struct net_device *hsr_dev, struct net_device *slave[2],
unsigned char multicast_spec, u8 protocol_version,
struct netlink_ext_ack *extack);
struct net_device *interlink, unsigned char multicast_spec,
u8 protocol_version, struct netlink_ext_ack *extack);
void hsr_check_carrier_and_operstate(struct hsr_priv *hsr);
int hsr_get_max_mtu(struct hsr_priv *hsr);
#endif /* __HSR_DEVICE_H */

83
net/hsr/hsr_forward.c
View file

@ -377,6 +377,15 @@ static int hsr_xmit(struct sk_buff *skb, struct hsr_port *port,
*/
ether_addr_copy(eth_hdr(skb)->h_source, port->dev->dev_addr);
}
/* When HSR node is used as RedBox - the frame received from HSR ring
* requires source MAC address (SA) replacement to one which can be
* recognized by SAN devices (otherwise, frames are dropped by switch)
*/
if (port->type == HSR_PT_INTERLINK)
ether_addr_copy(eth_hdr(skb)->h_source,
port->hsr->macaddress_redbox);
return dev_queue_xmit(skb);
}
@ -390,9 +399,57 @@ bool prp_drop_frame(struct hsr_frame_info *frame, struct hsr_port *port)
bool hsr_drop_frame(struct hsr_frame_info *frame, struct hsr_port *port)
{
struct sk_buff *skb;
if (port->dev->features & NETIF_F_HW_HSR_FWD)
return prp_drop_frame(frame, port);
/* RedBox specific frames dropping policies
*
* Do not send HSR supervisory frames to SAN devices
*/
if (frame->is_supervision && port->type == HSR_PT_INTERLINK)
return true;
/* Do not forward to other HSR port (A or B) unicast frames which
* are addressed to interlink port (and are in the ProxyNodeTable).
*/
skb = frame->skb_hsr;
if (skb && prp_drop_frame(frame, port) &&
is_unicast_ether_addr(eth_hdr(skb)->h_dest) &&
hsr_is_node_in_db(&port->hsr->proxy_node_db,
eth_hdr(skb)->h_dest)) {
return true;
}
/* Do not forward to port C (Interlink) frames from nodes A and B
* if DA is in NodeTable.
*/
if ((frame->port_rcv->type == HSR_PT_SLAVE_A ||
frame->port_rcv->type == HSR_PT_SLAVE_B) &&
port->type == HSR_PT_INTERLINK) {
skb = frame->skb_hsr;
if (skb && is_unicast_ether_addr(eth_hdr(skb)->h_dest) &&
hsr_is_node_in_db(&port->hsr->node_db,
eth_hdr(skb)->h_dest)) {
return true;
}
}
/* Do not forward to port A and B unicast frames received on the
* interlink port if it is addressed to one of nodes registered in
* the ProxyNodeTable.
*/
if ((port->type == HSR_PT_SLAVE_A || port->type == HSR_PT_SLAVE_B) &&
frame->port_rcv->type == HSR_PT_INTERLINK) {
skb = frame->skb_std;
if (skb && is_unicast_ether_addr(eth_hdr(skb)->h_dest) &&
hsr_is_node_in_db(&port->hsr->proxy_node_db,
eth_hdr(skb)->h_dest)) {
return true;
}
}
return false;
}
@ -448,13 +505,14 @@ static void hsr_forward_do(struct hsr_frame_info *frame)
}
/* Check if frame is to be dropped. Eg. for PRP no forward
* between ports.
* between ports, or sending HSR supervision to RedBox.
*/
if (hsr->proto_ops->drop_frame &&
hsr->proto_ops->drop_frame(frame, port))
continue;
if (port->type != HSR_PT_MASTER)
if (port->type == HSR_PT_SLAVE_A ||
port->type == HSR_PT_SLAVE_B)
skb = hsr->proto_ops->create_tagged_frame(frame, port);
else
skb = hsr->proto_ops->get_untagged_frame(frame, port);
@ -469,6 +527,8 @@ static void hsr_forward_do(struct hsr_frame_info *frame)
hsr_deliver_master(skb, port->dev, frame->node_src);
} else {
if (!hsr_xmit(skb, port, frame))
if (port->type == HSR_PT_SLAVE_A ||
port->type == HSR_PT_SLAVE_B)
sent = true;
}
}
@ -503,10 +563,12 @@ static void handle_std_frame(struct sk_buff *skb,
frame->skb_prp = NULL;
frame->skb_std = skb;
if (port->type != HSR_PT_MASTER) {
if (port->type != HSR_PT_MASTER)
frame->is_from_san = true;
} else {
/* Sequence nr for the master node */
if (port->type == HSR_PT_MASTER ||
port->type == HSR_PT_INTERLINK) {
/* Sequence nr for the master/interlink node */
lockdep_assert_held(&hsr->seqnr_lock);
frame->sequence_nr = hsr->sequence_nr;
hsr->sequence_nr++;
@ -564,6 +626,7 @@ static int fill_frame_info(struct hsr_frame_info *frame,
{
struct hsr_priv *hsr = port->hsr;
struct hsr_vlan_ethhdr *vlan_hdr;
struct list_head *n_db;
struct ethhdr *ethhdr;
__be16 proto;
int ret;
@ -574,9 +637,13 @@ static int fill_frame_info(struct hsr_frame_info *frame,
memset(frame, 0, sizeof(*frame));
frame->is_supervision = is_supervision_frame(port->hsr, skb);
frame->node_src = hsr_get_node(port, &hsr->node_db, skb,
frame->is_supervision,
port->type);
n_db = &hsr->node_db;
if (port->type == HSR_PT_INTERLINK)
n_db = &hsr->proxy_node_db;
frame->node_src = hsr_get_node(port, n_db, skb,
frame->is_supervision, port->type);
if (!frame->node_src)
return -1; /* Unknown node and !is_supervision, or no mem */

52
net/hsr/hsr_framereg.c
View file

@ -71,6 +71,14 @@ static struct hsr_node *find_node_by_addr_A(struct list_head *node_db,
return NULL;
}
/* Check if node for a given MAC address is already present in data base
*/
bool hsr_is_node_in_db(struct list_head *node_db,
const unsigned char addr[ETH_ALEN])
{
return !!find_node_by_addr_A(node_db, addr);
}
/* Helper for device init; the self_node is used in hsr_rcv() to recognize
* frames from self that's been looped over the HSR ring.
*/
@ -223,6 +231,15 @@ struct hsr_node *hsr_get_node(struct hsr_port *port, struct list_head *node_db,
}
}
/* Check if required node is not in proxy nodes table */
list_for_each_entry_rcu(node, &hsr->proxy_node_db, mac_list) {
if (ether_addr_equal(node->macaddress_A, ethhdr->h_source)) {
if (hsr->proto_ops->update_san_info)
hsr->proto_ops->update_san_info(node, is_sup);
return node;
}
}
/* Everyone may create a node entry, connected node to a HSR/PRP
* device.
*/
@ -418,6 +435,10 @@ void hsr_addr_subst_dest(struct hsr_node *node_src, struct sk_buff *skb,
node_dst = find_node_by_addr_A(&port->hsr->node_db,
eth_hdr(skb)->h_dest);
if (!node_dst && port->hsr->redbox)
node_dst = find_node_by_addr_A(&port->hsr->proxy_node_db,
eth_hdr(skb)->h_dest);
if (!node_dst) {
if (port->hsr->prot_version != PRP_V1 && net_ratelimit())
netdev_err(skb->dev, "%s: Unknown node\n", __func__);
@ -561,6 +582,37 @@ void hsr_prune_nodes(struct timer_list *t)
jiffies + msecs_to_jiffies(PRUNE_PERIOD));
}
void hsr_prune_proxy_nodes(struct timer_list *t)
{
struct hsr_priv *hsr = from_timer(hsr, t, prune_proxy_timer);
unsigned long timestamp;
struct hsr_node *node;
struct hsr_node *tmp;
spin_lock_bh(&hsr->list_lock);
list_for_each_entry_safe(node, tmp, &hsr->proxy_node_db, mac_list) {
timestamp = node->time_in[HSR_PT_INTERLINK];
/* Prune old entries */
if (time_is_before_jiffies(timestamp +
msecs_to_jiffies(HSR_PROXY_NODE_FORGET_TIME))) {
hsr_nl_nodedown(hsr, node->macaddress_A);
if (!node->removed) {
list_del_rcu(&node->mac_list);
node->removed = true;
/* Note that we need to free this entry later: */
kfree_rcu(node, rcu_head);
}
}
}
spin_unlock_bh(&hsr->list_lock);
/* Restart timer */
mod_timer(&hsr->prune_proxy_timer,
jiffies + msecs_to_jiffies(PRUNE_PROXY_PERIOD));
}
void *hsr_get_next_node(struct hsr_priv *hsr, void *_pos,
unsigned char addr[ETH_ALEN])
{

4
net/hsr/hsr_framereg.h
View file

@ -46,6 +46,7 @@ int hsr_register_frame_out(struct hsr_port *port, struct hsr_node *node,
u16 sequence_nr);
void hsr_prune_nodes(struct timer_list *t);
void hsr_prune_proxy_nodes(struct timer_list *t);
int hsr_create_self_node(struct hsr_priv *hsr,
const unsigned char addr_a[ETH_ALEN],
@ -67,6 +68,9 @@ void prp_handle_san_frame(bool san, enum hsr_port_type port,
struct hsr_node *node);
void prp_update_san_info(struct hsr_node *node, bool is_sup);
bool hsr_is_node_in_db(struct list_head *node_db,
const unsigned char addr[ETH_ALEN]);
struct hsr_node {
struct list_head mac_list;
/* Protect R/W access to seq_out */

7
net/hsr/hsr_main.h
View file

@ -21,6 +21,7 @@
*/
#define HSR_LIFE_CHECK_INTERVAL 2000 /* ms */
#define HSR_NODE_FORGET_TIME 60000 /* ms */
#define HSR_PROXY_NODE_FORGET_TIME 60000 /* ms */
#define HSR_ANNOUNCE_INTERVAL 100 /* ms */
#define HSR_ENTRY_FORGET_TIME 400 /* ms */
@ -35,6 +36,7 @@
* HSR_NODE_FORGET_TIME?
*/
#define PRUNE_PERIOD 3000 /* ms */
#define PRUNE_PROXY_PERIOD 3000 /* ms */
#define HSR_TLV_EOT 0 /* End of TLVs */
#define HSR_TLV_ANNOUNCE 22
#define HSR_TLV_LIFE_CHECK 23
@ -192,11 +194,14 @@ struct hsr_priv {
struct rcu_head rcu_head;
struct list_head ports;
struct list_head node_db; /* Known HSR nodes */
struct list_head proxy_node_db; /* RedBox HSR proxy nodes */
struct hsr_self_node __rcu *self_node; /* MACs of slaves */
struct timer_list announce_timer; /* Supervision frame dispatch */
struct timer_list prune_timer;
struct timer_list prune_proxy_timer;
int announce_count;
u16 sequence_nr;
u16 interlink_sequence_nr; /* Interlink port seq_nr */
u16 sup_sequence_nr; /* For HSRv1 separate seq_nr for supervision */
enum hsr_version prot_version; /* Indicate if HSRv0, HSRv1 or PRPv1 */
spinlock_t seqnr_lock; /* locking for sequence_nr */
@ -209,6 +214,8 @@ struct hsr_priv {
* of lan_id
*/
bool fwd_offloaded; /* Forwarding offloaded to HW */
bool redbox; /* Device supports HSR RedBox */
unsigned char macaddress_redbox[ETH_ALEN];
unsigned char sup_multicast_addr[ETH_ALEN] __aligned(sizeof(u16));
/* Align to u16 boundary to avoid unaligned access
* in ether_addr_equal

30
net/hsr/hsr_netlink.c
View file

@ -23,6 +23,7 @@ static const struct nla_policy hsr_policy[IFLA_HSR_MAX + 1] = {
[IFLA_HSR_SUPERVISION_ADDR] = { .len = ETH_ALEN },
[IFLA_HSR_SEQ_NR] = { .type = NLA_U16 },
[IFLA_HSR_PROTOCOL] = { .type = NLA_U8 },
[IFLA_HSR_INTERLINK] = { .type = NLA_U32 },
};
/* Here, it seems a netdevice has already been allocated for us, and the
@ -35,8 +36,8 @@ static int hsr_newlink(struct net *src_net, struct net_device *dev,
enum hsr_version proto_version;
unsigned char multicast_spec;
u8 proto = HSR_PROTOCOL_HSR;
struct net_device *link[2];
struct net_device *link[2], *interlink = NULL;
if (!data) {
NL_SET_ERR_MSG_MOD(extack, "No slave devices specified");
return -EINVAL;
@ -67,6 +68,20 @@ static int hsr_newlink(struct net *src_net, struct net_device *dev,
return -EINVAL;
}
if (data[IFLA_HSR_INTERLINK])
interlink = __dev_get_by_index(src_net,
nla_get_u32(data[IFLA_HSR_INTERLINK]));
if (interlink && interlink == link[0]) {
NL_SET_ERR_MSG_MOD(extack, "Interlink and Slave1 are the same");
return -EINVAL;
}
if (interlink && interlink == link[1]) {
NL_SET_ERR_MSG_MOD(extack, "Interlink and Slave2 are the same");
return -EINVAL;
}
if (!data[IFLA_HSR_MULTICAST_SPEC])
multicast_spec = 0;
else
@ -96,10 +111,17 @@ static int hsr_newlink(struct net *src_net, struct net_device *dev,
}
}
if (proto == HSR_PROTOCOL_PRP)
if (proto == HSR_PROTOCOL_PRP) {
proto_version = PRP_V1;
if (interlink) {
NL_SET_ERR_MSG_MOD(extack,
"Interlink only works with HSR");
return -EINVAL;
}
}
return hsr_dev_finalize(dev, link, multicast_spec, proto_version, extack);
return hsr_dev_finalize(dev, link, interlink, multicast_spec,
proto_version, extack);
}
static void hsr_dellink(struct net_device *dev, struct list_head *head)
@ -107,6 +129,7 @@ static void hsr_dellink(struct net_device *dev, struct list_head *head)
struct hsr_priv *hsr = netdev_priv(dev);
del_timer_sync(&hsr->prune_timer);
del_timer_sync(&hsr->prune_proxy_timer);
del_timer_sync(&hsr->announce_timer);
hsr_debugfs_term(hsr);
@ -114,6 +137,7 @@ static void hsr_dellink(struct net_device *dev, struct list_head *head)
hsr_del_self_node(hsr);
hsr_del_nodes(&hsr->node_db);
hsr_del_nodes(&hsr->proxy_node_db);
unregister_netdevice_queue(dev, head);
}

1
net/hsr/hsr_slave.c
View file

@ -55,6 +55,7 @@ static rx_handler_result_t hsr_handle_frame(struct sk_buff **pskb)
protocol = eth_hdr(skb)->h_proto;
if (!(port->dev->features & NETIF_F_HW_HSR_TAG_RM) &&
port->type != HSR_PT_INTERLINK &&
hsr->proto_ops->invalid_dan_ingress_frame &&
hsr->proto_ops->invalid_dan_ingress_frame(protocol))
goto finish_pass;