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OpenCloudOS-Kernel/net/hsr/hsr_framereg.h

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net: hsr: convert to SPDX identifier Use SPDX-License-Identifier instead of a verbose license text. Signed-off-by: Murali Karicheri <m-karicheri2@ti.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-04-06 01:31:34 +08:00
/* SPDX-License-Identifier: GPL-2.0 */
net/hsr: Better variable names and update of contact info. Signed-off-by: Arvid Brodin <arvid.brodin@alten.se> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-07-05 05:34:38 +08:00
/* Copyright 2011-2014 Autronica Fire and Security AS
net/hsr: Add support for the High-availability Seamless Redundancy protocol (HSRv0) High-availability Seamless Redundancy ("HSR") provides instant failover redundancy for Ethernet networks. It requires a special network topology where all nodes are connected in a ring (each node having two physical network interfaces). It is suited for applications that demand high availability and very short reaction time. HSR acts on the Ethernet layer, using a registered Ethernet protocol type to send special HSR frames in both directions over the ring. The driver creates virtual network interfaces that can be used just like any ordinary Linux network interface, for IP/TCP/UDP traffic etc. All nodes in the network ring must be HSR capable. This code is a "best effort" to comply with the HSR standard as described in IEC 62439-3:2010 (HSRv0). Signed-off-by: Arvid Brodin <arvid.brodin@xdin.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-10-31 04:10:47 +08:00
*
* Author(s):
net/hsr: Better variable names and update of contact info. Signed-off-by: Arvid Brodin <arvid.brodin@alten.se> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-07-05 05:34:38 +08:00
* 2011-2014 Arvid Brodin, arvid.brodin@alten.se
hsr: enhance netlink socket interface to support PRP Parallel Redundancy Protocol (PRP) is another redundancy protocol introduced by IEC 63439 standard. It is similar to HSR in many aspects:- - Use a pair of Ethernet interfaces to created the PRP device - Use a 6 byte redundancy protocol part (RCT, Redundancy Check Trailer) similar to HSR Tag. - Has Link Redundancy Entity (LRE) that works with RCT to implement redundancy. Key difference is that the protocol unit is a trailer instead of a prefix as in HSR. That makes it inter-operable with tradition network components such as bridges/switches which treat it as pad bytes, whereas HSR nodes requires some kind of translators (Called redbox) to talk to regular network devices. This features allows regular linux box to be converted to a DAN-P box. DAN-P stands for Dual Attached Node - PRP similar to DAN-H (Dual Attached Node - HSR). Add a comment at the header/source code to explicitly state that the driver files also handles PRP protocol as well. Signed-off-by: Murali Karicheri <m-karicheri2@ti.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-22 22:40:16 +08:00
*
* include file for HSR and PRP.
net/hsr: Add support for the High-availability Seamless Redundancy protocol (HSRv0) High-availability Seamless Redundancy ("HSR") provides instant failover redundancy for Ethernet networks. It requires a special network topology where all nodes are connected in a ring (each node having two physical network interfaces). It is suited for applications that demand high availability and very short reaction time. HSR acts on the Ethernet layer, using a registered Ethernet protocol type to send special HSR frames in both directions over the ring. The driver creates virtual network interfaces that can be used just like any ordinary Linux network interface, for IP/TCP/UDP traffic etc. All nodes in the network ring must be HSR capable. This code is a "best effort" to comply with the HSR standard as described in IEC 62439-3:2010 (HSRv0). Signed-off-by: Arvid Brodin <arvid.brodin@xdin.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-10-31 04:10:47 +08:00
*/
net/hsr: Better variable names and update of contact info. Signed-off-by: Arvid Brodin <arvid.brodin@alten.se> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-07-05 05:34:38 +08:00
#ifndef __HSR_FRAMEREG_H
#define __HSR_FRAMEREG_H
net/hsr: Add support for the High-availability Seamless Redundancy protocol (HSRv0) High-availability Seamless Redundancy ("HSR") provides instant failover redundancy for Ethernet networks. It requires a special network topology where all nodes are connected in a ring (each node having two physical network interfaces). It is suited for applications that demand high availability and very short reaction time. HSR acts on the Ethernet layer, using a registered Ethernet protocol type to send special HSR frames in both directions over the ring. The driver creates virtual network interfaces that can be used just like any ordinary Linux network interface, for IP/TCP/UDP traffic etc. All nodes in the network ring must be HSR capable. This code is a "best effort" to comply with the HSR standard as described in IEC 62439-3:2010 (HSRv0). Signed-off-by: Arvid Brodin <arvid.brodin@xdin.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-10-31 04:10:47 +08:00
#include "hsr_main.h"
net/hsr: Better variable names and update of contact info. Signed-off-by: Arvid Brodin <arvid.brodin@alten.se> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-07-05 05:34:38 +08:00
struct hsr_node;
net/hsr: Add support for the High-availability Seamless Redundancy protocol (HSRv0) High-availability Seamless Redundancy ("HSR") provides instant failover redundancy for Ethernet networks. It requires a special network topology where all nodes are connected in a ring (each node having two physical network interfaces). It is suited for applications that demand high availability and very short reaction time. HSR acts on the Ethernet layer, using a registered Ethernet protocol type to send special HSR frames in both directions over the ring. The driver creates virtual network interfaces that can be used just like any ordinary Linux network interface, for IP/TCP/UDP traffic etc. All nodes in the network ring must be HSR capable. This code is a "best effort" to comply with the HSR standard as described in IEC 62439-3:2010 (HSRv0). Signed-off-by: Arvid Brodin <arvid.brodin@xdin.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-10-31 04:10:47 +08:00
net: prp: add packet handling support DAN-P (Dual Attached Nodes PRP) nodes are expected to receive traditional IP packets as well as PRP (Parallel Redundancy Protocol) tagged (trailer) packets. PRP trailer is 6 bytes of PRP protocol unit called RCT, Redundancy Control Trailer (RCT) similar to HSR tag. PRP network can have traditional devices such as bridges/switches or PC attached to it and should be able to communicate. Regular Ethernet devices treat the RCT as pads. This patch adds logic to format L2 frames from network stack to add a trailer (RCT) and send it as duplicates over the slave interfaces when the protocol is PRP as per IEC 62439-3. At the ingress, it strips the trailer, do duplicate detection and rejection and forward a stripped frame up the network stack. PRP device should accept frames from Singly Attached Nodes (SAN) and thus the driver mark the link where the frame came from in the node table. Signed-off-by: Murali Karicheri <m-karicheri2@ti.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-22 22:40:21 +08:00
struct hsr_frame_info {
struct sk_buff *skb_std;
struct sk_buff *skb_hsr;
struct sk_buff *skb_prp;
struct hsr_port *port_rcv;
struct hsr_node *node_src;
u16 sequence_nr;
bool is_supervision;
bool is_vlan;
bool is_local_dest;
bool is_local_exclusive;
bool is_from_san;
};
net: hsr: fix hsr build error when lockdep is not enabled In hsr, lockdep_is_held() is needed for rcu_dereference_bh_check(). But if lockdep is not enabled, lockdep_is_held() causes a build error: ERROR: modpost: "lockdep_is_held" [net/hsr/hsr.ko] undefined! Thus, this patch solved by adding lockdep_hsr_is_held(). This helper function calls the lockdep_is_held() when lockdep is enabled, and returns 1 if not defined. Fixes: e7f27420681f ("net: hsr: fix suspicious RCU usage warning in hsr_node_get_first()") Reported-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Juhee Kang <claudiajkang@gmail.com> Link: https://lore.kernel.org/r/20220220153250.5285-1-claudiajkang@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-02-20 23:32:50 +08:00
#ifdef CONFIG_LOCKDEP
int lockdep_hsr_is_held(spinlock_t *lock);
#else
#define lockdep_hsr_is_held(lock) 1
#endif
net: hsr: use hlist_head instead of list_head for mac addresses Currently, HSR manages mac addresses of known HSR nodes by using list_head. It takes a lot of time when there are a lot of registered nodes due to finding specific mac address nodes by using linear search. We can be reducing the time by using hlist. Thus, this patch moves list_head to hlist_head for mac addresses and this allows for further improvement of network performance. Condition: registered 10,000 known HSR nodes Before: # iperf3 -c 192.168.10.1 -i 1 -t 10 Connecting to host 192.168.10.1, port 5201 [ 5] local 192.168.10.2 port 59442 connected to 192.168.10.1 port 5201 [ ID] Interval Transfer Bitrate Retr Cwnd [ 5] 0.00-1.49 sec 3.75 MBytes 21.1 Mbits/sec 0 158 KBytes [ 5] 1.49-2.05 sec 1.25 MBytes 18.7 Mbits/sec 0 166 KBytes [ 5] 2.05-3.06 sec 2.44 MBytes 20.3 Mbits/sec 56 16.9 KBytes [ 5] 3.06-4.08 sec 1.43 MBytes 11.7 Mbits/sec 11 38.0 KBytes [ 5] 4.08-5.00 sec 951 KBytes 8.49 Mbits/sec 0 56.3 KBytes After: # iperf3 -c 192.168.10.1 -i 1 -t 10 Connecting to host 192.168.10.1, port 5201 [ 5] local 192.168.10.2 port 36460 connected to 192.168.10.1 port 5201 [ ID] Interval Transfer Bitrate Retr Cwnd [ 5] 0.00-1.00 sec 7.39 MBytes 62.0 Mbits/sec 3 130 KBytes [ 5] 1.00-2.00 sec 5.06 MBytes 42.4 Mbits/sec 16 113 KBytes [ 5] 2.00-3.00 sec 8.58 MBytes 72.0 Mbits/sec 42 94.3 KBytes [ 5] 3.00-4.00 sec 7.44 MBytes 62.4 Mbits/sec 2 131 KBytes [ 5] 4.00-5.07 sec 8.13 MBytes 63.5 Mbits/sec 38 92.9 KBytes Signed-off-by: Juhee Kang <claudiajkang@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2022-02-05 23:40:38 +08:00
u32 hsr_mac_hash(struct hsr_priv *hsr, const unsigned char *addr);
net: hsr: fix hsr build error when lockdep is not enabled In hsr, lockdep_is_held() is needed for rcu_dereference_bh_check(). But if lockdep is not enabled, lockdep_is_held() causes a build error: ERROR: modpost: "lockdep_is_held" [net/hsr/hsr.ko] undefined! Thus, this patch solved by adding lockdep_hsr_is_held(). This helper function calls the lockdep_is_held() when lockdep is enabled, and returns 1 if not defined. Fixes: e7f27420681f ("net: hsr: fix suspicious RCU usage warning in hsr_node_get_first()") Reported-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Juhee Kang <claudiajkang@gmail.com> Link: https://lore.kernel.org/r/20220220153250.5285-1-claudiajkang@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-02-20 23:32:50 +08:00
struct hsr_node *hsr_node_get_first(struct hlist_head *head, spinlock_t *lock);
hsr: fix a race condition in node list insertion and deletion hsr nodes are protected by RCU and there is no write side lock. But node insertions and deletions could be being operated concurrently. So write side locking is needed. Test commands: ip netns add nst ip link add veth0 type veth peer name veth1 ip link add veth2 type veth peer name veth3 ip link set veth1 netns nst ip link set veth3 netns nst ip link set veth0 up ip link set veth2 up ip link add hsr0 type hsr slave1 veth0 slave2 veth2 ip a a 192.168.100.1/24 dev hsr0 ip link set hsr0 up ip netns exec nst ip link set veth1 up ip netns exec nst ip link set veth3 up ip netns exec nst ip link add hsr1 type hsr slave1 veth1 slave2 veth3 ip netns exec nst ip a a 192.168.100.2/24 dev hsr1 ip netns exec nst ip link set hsr1 up for i in {0..9} do for j in {0..9} do for k in {0..9} do for l in {0..9} do arping 192.168.100.2 -I hsr0 -s 00:01:3$i:4$j:5$k:6$l -c1 & done done done done Splat looks like: [ 236.066091][ T3286] list_add corruption. next->prev should be prev (ffff8880a5940300), but was ffff8880a5940d0. [ 236.069617][ T3286] ------------[ cut here ]------------ [ 236.070545][ T3286] kernel BUG at lib/list_debug.c:25! [ 236.071391][ T3286] invalid opcode: 0000 [#1] SMP DEBUG_PAGEALLOC KASAN PTI [ 236.072343][ T3286] CPU: 0 PID: 3286 Comm: arping Tainted: G W 5.5.0-rc1+ #209 [ 236.073463][ T3286] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006 [ 236.074695][ T3286] RIP: 0010:__list_add_valid+0x74/0xd0 [ 236.075499][ T3286] Code: 48 39 da 75 27 48 39 f5 74 36 48 39 dd 74 31 48 83 c4 08 b8 01 00 00 00 5b 5d c3 48 b [ 236.078277][ T3286] RSP: 0018:ffff8880aaa97648 EFLAGS: 00010286 [ 236.086991][ T3286] RAX: 0000000000000075 RBX: ffff8880d4624c20 RCX: 0000000000000000 [ 236.088000][ T3286] RDX: 0000000000000075 RSI: 0000000000000008 RDI: ffffed1015552ebf [ 236.098897][ T3286] RBP: ffff88809b53d200 R08: ffffed101b3c04f9 R09: ffffed101b3c04f9 [ 236.099960][ T3286] R10: 00000000308769a1 R11: ffffed101b3c04f8 R12: ffff8880d4624c28 [ 236.100974][ T3286] R13: ffff8880d4624c20 R14: 0000000040310100 R15: ffff8880ce17ee02 [ 236.138967][ T3286] FS: 00007f23479fa680(0000) GS:ffff8880d9c00000(0000) knlGS:0000000000000000 [ 236.144852][ T3286] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 236.145720][ T3286] CR2: 00007f4a14bab210 CR3: 00000000a61c6001 CR4: 00000000000606f0 [ 236.146776][ T3286] Call Trace: [ 236.147222][ T3286] hsr_add_node+0x314/0x490 [hsr] [ 236.153633][ T3286] hsr_forward_skb+0x2b6/0x1bc0 [hsr] [ 236.154362][ T3286] ? rcu_read_lock_sched_held+0x90/0xc0 [ 236.155091][ T3286] ? rcu_read_lock_bh_held+0xa0/0xa0 [ 236.156607][ T3286] hsr_dev_xmit+0x70/0xd0 [hsr] [ 236.157254][ T3286] dev_hard_start_xmit+0x160/0x740 [ 236.157941][ T3286] __dev_queue_xmit+0x1961/0x2e10 [ 236.158565][ T3286] ? netdev_core_pick_tx+0x2e0/0x2e0 [ ... ] Reported-by: syzbot+3924327f9ad5f4d2b343@syzkaller.appspotmail.com Fixes: f421436a591d ("net/hsr: Add support for the High-availability Seamless Redundancy protocol (HSRv0)") Signed-off-by: Taehee Yoo <ap420073@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-12-22 19:26:54 +08:00
void hsr_del_self_node(struct hsr_priv *hsr);
net: hsr: use hlist_head instead of list_head for mac addresses Currently, HSR manages mac addresses of known HSR nodes by using list_head. It takes a lot of time when there are a lot of registered nodes due to finding specific mac address nodes by using linear search. We can be reducing the time by using hlist. Thus, this patch moves list_head to hlist_head for mac addresses and this allows for further improvement of network performance. Condition: registered 10,000 known HSR nodes Before: # iperf3 -c 192.168.10.1 -i 1 -t 10 Connecting to host 192.168.10.1, port 5201 [ 5] local 192.168.10.2 port 59442 connected to 192.168.10.1 port 5201 [ ID] Interval Transfer Bitrate Retr Cwnd [ 5] 0.00-1.49 sec 3.75 MBytes 21.1 Mbits/sec 0 158 KBytes [ 5] 1.49-2.05 sec 1.25 MBytes 18.7 Mbits/sec 0 166 KBytes [ 5] 2.05-3.06 sec 2.44 MBytes 20.3 Mbits/sec 56 16.9 KBytes [ 5] 3.06-4.08 sec 1.43 MBytes 11.7 Mbits/sec 11 38.0 KBytes [ 5] 4.08-5.00 sec 951 KBytes 8.49 Mbits/sec 0 56.3 KBytes After: # iperf3 -c 192.168.10.1 -i 1 -t 10 Connecting to host 192.168.10.1, port 5201 [ 5] local 192.168.10.2 port 36460 connected to 192.168.10.1 port 5201 [ ID] Interval Transfer Bitrate Retr Cwnd [ 5] 0.00-1.00 sec 7.39 MBytes 62.0 Mbits/sec 3 130 KBytes [ 5] 1.00-2.00 sec 5.06 MBytes 42.4 Mbits/sec 16 113 KBytes [ 5] 2.00-3.00 sec 8.58 MBytes 72.0 Mbits/sec 42 94.3 KBytes [ 5] 3.00-4.00 sec 7.44 MBytes 62.4 Mbits/sec 2 131 KBytes [ 5] 4.00-5.07 sec 8.13 MBytes 63.5 Mbits/sec 38 92.9 KBytes Signed-off-by: Juhee Kang <claudiajkang@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2022-02-05 23:40:38 +08:00
void hsr_del_nodes(struct hlist_head *node_db);
struct hsr_node *hsr_get_node(struct hsr_port *port, struct hlist_head *node_db,
net: prp: add packet handling support DAN-P (Dual Attached Nodes PRP) nodes are expected to receive traditional IP packets as well as PRP (Parallel Redundancy Protocol) tagged (trailer) packets. PRP trailer is 6 bytes of PRP protocol unit called RCT, Redundancy Control Trailer (RCT) similar to HSR tag. PRP network can have traditional devices such as bridges/switches or PC attached to it and should be able to communicate. Regular Ethernet devices treat the RCT as pads. This patch adds logic to format L2 frames from network stack to add a trailer (RCT) and send it as duplicates over the slave interfaces when the protocol is PRP as per IEC 62439-3. At the ingress, it strips the trailer, do duplicate detection and rejection and forward a stripped frame up the network stack. PRP device should accept frames from Singly Attached Nodes (SAN) and thus the driver mark the link where the frame came from in the node table. Signed-off-by: Murali Karicheri <m-karicheri2@ti.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-22 22:40:21 +08:00
struct sk_buff *skb, bool is_sup,
enum hsr_port_type rx_port);
void hsr_handle_sup_frame(struct hsr_frame_info *frame);
net/hsr: Better frame dispatch This patch removes the separate paths for frames coming from the outside, and frames sent from the HSR device, and instead makes all frames go through hsr_forward_skb() in hsr_forward.c. This greatly improves code readability and also opens up the possibility for future support of the HSR Interlink device that is the basis for HSR RedBoxes and HSR QuadBoxes, as well as VLAN compatibility. Other improvements: * A reduction in the number of times an skb is copied on machines without HAVE_EFFICIENT_UNALIGNED_ACCESS, which improves throughput somewhat. * Headers are now created using the standard eth_header(), and using the standard hard_header_len. * Each HSR slave now gets its own private skb, so slave-specific fields can be correctly set. Signed-off-by: Arvid Brodin <arvid.brodin@alten.se> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-07-05 05:41:03 +08:00
bool hsr_addr_is_self(struct hsr_priv *hsr, unsigned char *addr);
void hsr_addr_subst_source(struct hsr_node *node, struct sk_buff *skb);
void hsr_addr_subst_dest(struct hsr_node *node_src, struct sk_buff *skb,
net/hsr: Use list_head (and rcu) instead of array for slave devices. Signed-off-by: Arvid Brodin <arvid.brodin@alten.se> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-07-05 05:38:05 +08:00
struct hsr_port *port);
net/hsr: Add support for the High-availability Seamless Redundancy protocol (HSRv0) High-availability Seamless Redundancy ("HSR") provides instant failover redundancy for Ethernet networks. It requires a special network topology where all nodes are connected in a ring (each node having two physical network interfaces). It is suited for applications that demand high availability and very short reaction time. HSR acts on the Ethernet layer, using a registered Ethernet protocol type to send special HSR frames in both directions over the ring. The driver creates virtual network interfaces that can be used just like any ordinary Linux network interface, for IP/TCP/UDP traffic etc. All nodes in the network ring must be HSR capable. This code is a "best effort" to comply with the HSR standard as described in IEC 62439-3:2010 (HSRv0). Signed-off-by: Arvid Brodin <arvid.brodin@xdin.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-10-31 04:10:47 +08:00
net/hsr: Better frame dispatch This patch removes the separate paths for frames coming from the outside, and frames sent from the HSR device, and instead makes all frames go through hsr_forward_skb() in hsr_forward.c. This greatly improves code readability and also opens up the possibility for future support of the HSR Interlink device that is the basis for HSR RedBoxes and HSR QuadBoxes, as well as VLAN compatibility. Other improvements: * A reduction in the number of times an skb is copied on machines without HAVE_EFFICIENT_UNALIGNED_ACCESS, which improves throughput somewhat. * Headers are now created using the standard eth_header(), and using the standard hard_header_len. * Each HSR slave now gets its own private skb, so slave-specific fields can be correctly set. Signed-off-by: Arvid Brodin <arvid.brodin@alten.se> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-07-05 05:41:03 +08:00
void hsr_register_frame_in(struct hsr_node *node, struct hsr_port *port,
u16 sequence_nr);
int hsr_register_frame_out(struct hsr_port *port, struct hsr_node *node,
u16 sequence_nr);
net/hsr: Add support for the High-availability Seamless Redundancy protocol (HSRv0) High-availability Seamless Redundancy ("HSR") provides instant failover redundancy for Ethernet networks. It requires a special network topology where all nodes are connected in a ring (each node having two physical network interfaces). It is suited for applications that demand high availability and very short reaction time. HSR acts on the Ethernet layer, using a registered Ethernet protocol type to send special HSR frames in both directions over the ring. The driver creates virtual network interfaces that can be used just like any ordinary Linux network interface, for IP/TCP/UDP traffic etc. All nodes in the network ring must be HSR capable. This code is a "best effort" to comply with the HSR standard as described in IEC 62439-3:2010 (HSRv0). Signed-off-by: Arvid Brodin <arvid.brodin@xdin.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-10-31 04:10:47 +08:00
net: hsr: Convert timers to use timer_setup() In preparation for unconditionally passing the struct timer_list pointer to all timer callbacks, switch to using the new timer_setup() and from_timer() to pass the timer pointer explicitly. Cc: Arvid Brodin <arvid.brodin@alten.se> Cc: "David S. Miller" <davem@davemloft.net> Cc: netdev@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-24 16:46:16 +08:00
void hsr_prune_nodes(struct timer_list *t);
net/hsr: Add support for the High-availability Seamless Redundancy protocol (HSRv0) High-availability Seamless Redundancy ("HSR") provides instant failover redundancy for Ethernet networks. It requires a special network topology where all nodes are connected in a ring (each node having two physical network interfaces). It is suited for applications that demand high availability and very short reaction time. HSR acts on the Ethernet layer, using a registered Ethernet protocol type to send special HSR frames in both directions over the ring. The driver creates virtual network interfaces that can be used just like any ordinary Linux network interface, for IP/TCP/UDP traffic etc. All nodes in the network ring must be HSR capable. This code is a "best effort" to comply with the HSR standard as described in IEC 62439-3:2010 (HSRv0). Signed-off-by: Arvid Brodin <arvid.brodin@xdin.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-10-31 04:10:47 +08:00
hsr: fix a race condition in node list insertion and deletion hsr nodes are protected by RCU and there is no write side lock. But node insertions and deletions could be being operated concurrently. So write side locking is needed. Test commands: ip netns add nst ip link add veth0 type veth peer name veth1 ip link add veth2 type veth peer name veth3 ip link set veth1 netns nst ip link set veth3 netns nst ip link set veth0 up ip link set veth2 up ip link add hsr0 type hsr slave1 veth0 slave2 veth2 ip a a 192.168.100.1/24 dev hsr0 ip link set hsr0 up ip netns exec nst ip link set veth1 up ip netns exec nst ip link set veth3 up ip netns exec nst ip link add hsr1 type hsr slave1 veth1 slave2 veth3 ip netns exec nst ip a a 192.168.100.2/24 dev hsr1 ip netns exec nst ip link set hsr1 up for i in {0..9} do for j in {0..9} do for k in {0..9} do for l in {0..9} do arping 192.168.100.2 -I hsr0 -s 00:01:3$i:4$j:5$k:6$l -c1 & done done done done Splat looks like: [ 236.066091][ T3286] list_add corruption. next->prev should be prev (ffff8880a5940300), but was ffff8880a5940d0. [ 236.069617][ T3286] ------------[ cut here ]------------ [ 236.070545][ T3286] kernel BUG at lib/list_debug.c:25! [ 236.071391][ T3286] invalid opcode: 0000 [#1] SMP DEBUG_PAGEALLOC KASAN PTI [ 236.072343][ T3286] CPU: 0 PID: 3286 Comm: arping Tainted: G W 5.5.0-rc1+ #209 [ 236.073463][ T3286] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006 [ 236.074695][ T3286] RIP: 0010:__list_add_valid+0x74/0xd0 [ 236.075499][ T3286] Code: 48 39 da 75 27 48 39 f5 74 36 48 39 dd 74 31 48 83 c4 08 b8 01 00 00 00 5b 5d c3 48 b [ 236.078277][ T3286] RSP: 0018:ffff8880aaa97648 EFLAGS: 00010286 [ 236.086991][ T3286] RAX: 0000000000000075 RBX: ffff8880d4624c20 RCX: 0000000000000000 [ 236.088000][ T3286] RDX: 0000000000000075 RSI: 0000000000000008 RDI: ffffed1015552ebf [ 236.098897][ T3286] RBP: ffff88809b53d200 R08: ffffed101b3c04f9 R09: ffffed101b3c04f9 [ 236.099960][ T3286] R10: 00000000308769a1 R11: ffffed101b3c04f8 R12: ffff8880d4624c28 [ 236.100974][ T3286] R13: ffff8880d4624c20 R14: 0000000040310100 R15: ffff8880ce17ee02 [ 236.138967][ T3286] FS: 00007f23479fa680(0000) GS:ffff8880d9c00000(0000) knlGS:0000000000000000 [ 236.144852][ T3286] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 236.145720][ T3286] CR2: 00007f4a14bab210 CR3: 00000000a61c6001 CR4: 00000000000606f0 [ 236.146776][ T3286] Call Trace: [ 236.147222][ T3286] hsr_add_node+0x314/0x490 [hsr] [ 236.153633][ T3286] hsr_forward_skb+0x2b6/0x1bc0 [hsr] [ 236.154362][ T3286] ? rcu_read_lock_sched_held+0x90/0xc0 [ 236.155091][ T3286] ? rcu_read_lock_bh_held+0xa0/0xa0 [ 236.156607][ T3286] hsr_dev_xmit+0x70/0xd0 [hsr] [ 236.157254][ T3286] dev_hard_start_xmit+0x160/0x740 [ 236.157941][ T3286] __dev_queue_xmit+0x1961/0x2e10 [ 236.158565][ T3286] ? netdev_core_pick_tx+0x2e0/0x2e0 [ ... ] Reported-by: syzbot+3924327f9ad5f4d2b343@syzkaller.appspotmail.com Fixes: f421436a591d ("net/hsr: Add support for the High-availability Seamless Redundancy protocol (HSRv0)") Signed-off-by: Taehee Yoo <ap420073@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-12-22 19:26:54 +08:00
int hsr_create_self_node(struct hsr_priv *hsr,
net: hsr: get ready for const netdev->dev_addr hsr_create_self_node() may get netdev->dev_addr passed as argument, netdev->dev_addr will be const soon. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-10-23 07:21:00 +08:00
const unsigned char addr_a[ETH_ALEN],
const unsigned char addr_b[ETH_ALEN]);
net/hsr: Add support for the High-availability Seamless Redundancy protocol (HSRv0) High-availability Seamless Redundancy ("HSR") provides instant failover redundancy for Ethernet networks. It requires a special network topology where all nodes are connected in a ring (each node having two physical network interfaces). It is suited for applications that demand high availability and very short reaction time. HSR acts on the Ethernet layer, using a registered Ethernet protocol type to send special HSR frames in both directions over the ring. The driver creates virtual network interfaces that can be used just like any ordinary Linux network interface, for IP/TCP/UDP traffic etc. All nodes in the network ring must be HSR capable. This code is a "best effort" to comply with the HSR standard as described in IEC 62439-3:2010 (HSRv0). Signed-off-by: Arvid Brodin <arvid.brodin@xdin.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-10-31 04:10:47 +08:00
net/hsr: Better variable names and update of contact info. Signed-off-by: Arvid Brodin <arvid.brodin@alten.se> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-07-05 05:34:38 +08:00
void *hsr_get_next_node(struct hsr_priv *hsr, void *_pos,
net/hsr: Add support for the High-availability Seamless Redundancy protocol (HSRv0) High-availability Seamless Redundancy ("HSR") provides instant failover redundancy for Ethernet networks. It requires a special network topology where all nodes are connected in a ring (each node having two physical network interfaces). It is suited for applications that demand high availability and very short reaction time. HSR acts on the Ethernet layer, using a registered Ethernet protocol type to send special HSR frames in both directions over the ring. The driver creates virtual network interfaces that can be used just like any ordinary Linux network interface, for IP/TCP/UDP traffic etc. All nodes in the network ring must be HSR capable. This code is a "best effort" to comply with the HSR standard as described in IEC 62439-3:2010 (HSRv0). Signed-off-by: Arvid Brodin <arvid.brodin@xdin.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-10-31 04:10:47 +08:00
unsigned char addr[ETH_ALEN]);
net/hsr: Better variable names and update of contact info. Signed-off-by: Arvid Brodin <arvid.brodin@alten.se> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-07-05 05:34:38 +08:00
int hsr_get_node_data(struct hsr_priv *hsr,
net/hsr: Add support for the High-availability Seamless Redundancy protocol (HSRv0) High-availability Seamless Redundancy ("HSR") provides instant failover redundancy for Ethernet networks. It requires a special network topology where all nodes are connected in a ring (each node having two physical network interfaces). It is suited for applications that demand high availability and very short reaction time. HSR acts on the Ethernet layer, using a registered Ethernet protocol type to send special HSR frames in both directions over the ring. The driver creates virtual network interfaces that can be used just like any ordinary Linux network interface, for IP/TCP/UDP traffic etc. All nodes in the network ring must be HSR capable. This code is a "best effort" to comply with the HSR standard as described in IEC 62439-3:2010 (HSRv0). Signed-off-by: Arvid Brodin <arvid.brodin@xdin.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-10-31 04:10:47 +08:00
const unsigned char *addr,
unsigned char addr_b[ETH_ALEN],
unsigned int *addr_b_ifindex,
int *if1_age,
u16 *if1_seq,
int *if2_age,
u16 *if2_seq);
net: prp: add packet handling support DAN-P (Dual Attached Nodes PRP) nodes are expected to receive traditional IP packets as well as PRP (Parallel Redundancy Protocol) tagged (trailer) packets. PRP trailer is 6 bytes of PRP protocol unit called RCT, Redundancy Control Trailer (RCT) similar to HSR tag. PRP network can have traditional devices such as bridges/switches or PC attached to it and should be able to communicate. Regular Ethernet devices treat the RCT as pads. This patch adds logic to format L2 frames from network stack to add a trailer (RCT) and send it as duplicates over the slave interfaces when the protocol is PRP as per IEC 62439-3. At the ingress, it strips the trailer, do duplicate detection and rejection and forward a stripped frame up the network stack. PRP device should accept frames from Singly Attached Nodes (SAN) and thus the driver mark the link where the frame came from in the node table. Signed-off-by: Murali Karicheri <m-karicheri2@ti.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-22 22:40:21 +08:00
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);
net: hsr: add debugfs support for display node list This adds a debugfs interface to allow display the nodes learned by the hsr master. Signed-off-by: Murali Karicheri <m-karicheri2@ti.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-04-06 01:31:35 +08:00
struct hsr_node {
net: hsr: use hlist_head instead of list_head for mac addresses Currently, HSR manages mac addresses of known HSR nodes by using list_head. It takes a lot of time when there are a lot of registered nodes due to finding specific mac address nodes by using linear search. We can be reducing the time by using hlist. Thus, this patch moves list_head to hlist_head for mac addresses and this allows for further improvement of network performance. Condition: registered 10,000 known HSR nodes Before: # iperf3 -c 192.168.10.1 -i 1 -t 10 Connecting to host 192.168.10.1, port 5201 [ 5] local 192.168.10.2 port 59442 connected to 192.168.10.1 port 5201 [ ID] Interval Transfer Bitrate Retr Cwnd [ 5] 0.00-1.49 sec 3.75 MBytes 21.1 Mbits/sec 0 158 KBytes [ 5] 1.49-2.05 sec 1.25 MBytes 18.7 Mbits/sec 0 166 KBytes [ 5] 2.05-3.06 sec 2.44 MBytes 20.3 Mbits/sec 56 16.9 KBytes [ 5] 3.06-4.08 sec 1.43 MBytes 11.7 Mbits/sec 11 38.0 KBytes [ 5] 4.08-5.00 sec 951 KBytes 8.49 Mbits/sec 0 56.3 KBytes After: # iperf3 -c 192.168.10.1 -i 1 -t 10 Connecting to host 192.168.10.1, port 5201 [ 5] local 192.168.10.2 port 36460 connected to 192.168.10.1 port 5201 [ ID] Interval Transfer Bitrate Retr Cwnd [ 5] 0.00-1.00 sec 7.39 MBytes 62.0 Mbits/sec 3 130 KBytes [ 5] 1.00-2.00 sec 5.06 MBytes 42.4 Mbits/sec 16 113 KBytes [ 5] 2.00-3.00 sec 8.58 MBytes 72.0 Mbits/sec 42 94.3 KBytes [ 5] 3.00-4.00 sec 7.44 MBytes 62.4 Mbits/sec 2 131 KBytes [ 5] 4.00-5.07 sec 8.13 MBytes 63.5 Mbits/sec 38 92.9 KBytes Signed-off-by: Juhee Kang <claudiajkang@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2022-02-05 23:40:38 +08:00
struct hlist_node mac_list;
net: hsr: add debugfs support for display node list This adds a debugfs interface to allow display the nodes learned by the hsr master. Signed-off-by: Murali Karicheri <m-karicheri2@ti.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-04-06 01:31:35 +08:00
unsigned char macaddress_A[ETH_ALEN];
unsigned char macaddress_B[ETH_ALEN];
/* Local slave through which AddrB frames are received from this node */
enum hsr_port_type addr_B_port;
unsigned long time_in[HSR_PT_PORTS];
bool time_in_stale[HSR_PT_PORTS];
net: hsr: add support for EntryForgetTime In IEC 62439-3 EntryForgetTime is defined with a value of 400 ms. When a node does not send any frame within this time, the sequence number check for can be ignored. This solves communication issues with Cisco IE 2000 in Redbox mode. Fixes: f421436a591d ("net/hsr: Add support for the High-availability Seamless Redundancy protocol (HSRv0)") Signed-off-by: Marco Wenzel <marco.wenzel@a-eberle.de> Reviewed-by: George McCollister <george.mccollister@gmail.com> Tested-by: George McCollister <george.mccollister@gmail.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Link: https://lore.kernel.org/r/20210224094653.1440-1-marco.wenzel@a-eberle.de Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-02-24 17:46:49 +08:00
unsigned long time_out[HSR_PT_PORTS];
net: prp: add packet handling support DAN-P (Dual Attached Nodes PRP) nodes are expected to receive traditional IP packets as well as PRP (Parallel Redundancy Protocol) tagged (trailer) packets. PRP trailer is 6 bytes of PRP protocol unit called RCT, Redundancy Control Trailer (RCT) similar to HSR tag. PRP network can have traditional devices such as bridges/switches or PC attached to it and should be able to communicate. Regular Ethernet devices treat the RCT as pads. This patch adds logic to format L2 frames from network stack to add a trailer (RCT) and send it as duplicates over the slave interfaces when the protocol is PRP as per IEC 62439-3. At the ingress, it strips the trailer, do duplicate detection and rejection and forward a stripped frame up the network stack. PRP device should accept frames from Singly Attached Nodes (SAN) and thus the driver mark the link where the frame came from in the node table. Signed-off-by: Murali Karicheri <m-karicheri2@ti.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-22 22:40:21 +08:00
/* if the node is a SAN */
bool san_a;
bool san_b;
net: hsr: add debugfs support for display node list This adds a debugfs interface to allow display the nodes learned by the hsr master. Signed-off-by: Murali Karicheri <m-karicheri2@ti.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-04-06 01:31:35 +08:00
u16 seq_out[HSR_PT_PORTS];
struct rcu_head rcu_head;
};
net/hsr: Better variable names and update of contact info. Signed-off-by: Arvid Brodin <arvid.brodin@alten.se> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-07-05 05:34:38 +08:00
#endif /* __HSR_FRAMEREG_H */