[v4] net: hsr: Provide RedBox support (HSR-SAN)

Message ID	20240402085850.229058-1-lukma@denx.de (mailing list archive)
State	Changes Requested
Delegated to:	Netdev Maintainers
Headers	show Received: from phobos.denx.de (phobos.denx.de [85.214.62.61]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BD8CA4778E; Tue, 2 Apr 2024 08:59:12 +0000 (UTC) sender: lukma@denx.de) by phobos.denx.de (Postfix) with ESMTPSA id 9DEF1880F4; Tue, 2 Apr 2024 10:59:08 +0200 (CEST) From: Lukasz Majewski <lukma@denx.de> To: netdev@vger.kernel.org Cc: Andrew Lunn <andrew@lunn.ch>, Eric Dumazet <edumazet@google.com>, Vladimir Oltean <olteanv@gmail.com>, "David S. Miller" <davem@davemloft.net>, Jakub Kicinski <kuba@kernel.org>, Oleksij Rempel <o.rempel@pengutronix.de>, Tristram.Ha@microchip.com, Sebastian Andrzej Siewior <bigeasy@linutronix.de>, Paolo Abeni <pabeni@redhat.com>, Ravi Gunasekaran <r-gunasekaran@ti.com>, Simon Horman <horms@kernel.org>, Nikita Zhandarovich <n.zhandarovich@fintech.ru>, Murali Karicheri <m-karicheri2@ti.com>, Jiri Pirko <jiri@resnulli.us>, Dan Carpenter <dan.carpenter@linaro.org>, Ziyang Xuan <william.xuanziyang@huawei.com>, Shigeru Yoshida <syoshida@redhat.com>, linux-kernel@vger.kernel.org, Lukasz Majewski <lukma@denx.de> Subject: [PATCH v4] net: hsr: Provide RedBox support (HSR-SAN) Date: Tue, 2 Apr 2024 10:58:50 +0200 Message-Id: <20240402085850.229058-1-lukma@denx.de> Precedence: bulk MIME-Version: 1.0 Content-Transfer-Encoding: 8bit
Series	[v4] net: hsr: Provide RedBox support (HSR-SAN) \| expand [v4] net: hsr: Provide RedBox support (HSR-SAN)

Context	Check	Description
netdev/tree_selection	success	Guessing tree name failed - patch did not apply

diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h index ffa637b38c93..e9f10860ec8e 100644 --- a/include/uapi/linux/if_link.h +++ b/include/uapi/linux/if_link.h @@ -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, }; diff --git a/net/hsr/hsr_device.c b/net/hsr/hsr_device.c index e9d45133d641..05d484b9cea4 100644 --- a/net/hsr/hsr_device.c +++ b/net/hsr/hsr_device.c @@ -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; @@ -408,6 +422,10 @@ void hsr_del_ports(struct hsr_priv *hsr) port = hsr_port_get_hsr(hsr, HSR_PT_MASTER); if (port) hsr_del_port(port); + + port = hsr_port_get_hsr(hsr, HSR_PT_INTERLINK); + if (port) + hsr_del_port(port); } static void hsr_set_rx_mode(struct net_device *dev) @@ -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)); diff --git a/net/hsr/hsr_device.h b/net/hsr/hsr_device.h index 9060c92168f9..655284095b78 100644 --- a/net/hsr/hsr_device.h +++ b/net/hsr/hsr_device.h @@ -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 */ diff --git a/net/hsr/hsr_forward.c b/net/hsr/hsr_forward.c index 5d68cb181695..05a61b8286ec 100644 --- a/net/hsr/hsr_forward.c +++ b/net/hsr/hsr_forward.c @@ -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); @@ -469,7 +527,9 @@ 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)) - sent = true; + 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 */ diff --git a/net/hsr/hsr_framereg.c b/net/hsr/hsr_framereg.c index 26329db09210..614df9649794 100644 --- a/net/hsr/hsr_framereg.c +++ b/net/hsr/hsr_framereg.c @@ -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]) { diff --git a/net/hsr/hsr_framereg.h b/net/hsr/hsr_framereg.h index b23556251d62..67456a75d8fe 100644 --- a/net/hsr/hsr_framereg.h +++ b/net/hsr/hsr_framereg.h @@ -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], @@ -63,10 +64,15 @@ int hsr_get_node_data(struct hsr_priv *hsr, int *if2_age, u16 *if2_seq); +void hsr_handle_san_frame(bool san, enum hsr_port_type port, + struct hsr_node *node); 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 */ diff --git a/net/hsr/hsr_main.h b/net/hsr/hsr_main.h index 18e01791ad79..23850b16d1ea 100644 --- a/net/hsr/hsr_main.h +++ b/net/hsr/hsr_main.h @@ -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 diff --git a/net/hsr/hsr_netlink.c b/net/hsr/hsr_netlink.c index 78fe40eb9f01..86eae49009cb 100644 --- a/net/hsr/hsr_netlink.c +++ b/net/hsr/hsr_netlink.c @@ -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) @@ -114,6 +136,7 @@ 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); } diff --git a/net/hsr/hsr_slave.c b/net/hsr/hsr_slave.c index 1b6457f357bd..af6cf64a00e0 100644 --- a/net/hsr/hsr_slave.c +++ b/net/hsr/hsr_slave.c @@ -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;

[v4] net: hsr: Provide RedBox support (HSR-SAN)

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