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From 1e6ffb3129340291027d2690631f62eb7d0e0a78 Mon Sep 17 00:00:00 2001
From: Matt Ranostay <matt.ranostay@konsulko.com>
Date: Tue, 11 Feb 2020 18:13:45 -0800
Subject: [PATCH] network: add CAN Termination tristate option
Upstream-Status: Submitted
Signed-off-by: Matt Ranostay <matt.ranostay@konsulko.com>
---
src/libsystemd/sd-netlink/netlink-types.c | 1 +
src/network/networkd-can.c | 13 +++++++++++++
src/network/networkd-network-gperf.gperf | 1 +
src/network/networkd-network.c | 1 +
src/network/networkd-network.h | 1 +
test/fuzz/fuzz-network-parser/directives.network | 1 +
6 files changed, 18 insertions(+)
diff --git a/src/libsystemd/sd-netlink/netlink-types.c b/src/libsystemd/sd-netlink/netlink-types.c
index de9b8b21ab..69ca675a8d 100644
--- a/src/libsystemd/sd-netlink/netlink-types.c
+++ b/src/libsystemd/sd-netlink/netlink-types.c
@@ -310,6 +310,7 @@ static const NLType rtnl_link_info_data_can_types[] = {
[IFLA_CAN_BITTIMING] = { .size = sizeof(struct can_bittiming) },
[IFLA_CAN_RESTART_MS] = { .type = NETLINK_TYPE_U32 },
[IFLA_CAN_CTRLMODE] = { .size = sizeof(struct can_ctrlmode) },
+ [IFLA_CAN_TERMINATION] = { .type = NETLINK_TYPE_U16 },
};
static const NLType rtnl_link_info_data_macsec_types[] = {
diff --git a/src/network/networkd-can.c b/src/network/networkd-can.c
index 5755df57bd..3abe8ae2ed 100644
--- a/src/network/networkd-can.c
+++ b/src/network/networkd-can.c
@@ -9,6 +9,8 @@
#include "networkd-manager.h"
#include "string-util.h"
+#define CAN_TERMINATION_OHM_VALUE 120
+
static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
int r;
@@ -152,6 +154,17 @@ static int link_set_can(Link *link) {
return log_link_error_errno(link, r, "Could not append IFLA_CAN_CTRLMODE attribute: %m");
}
+ if (link->network->can_termination >= 0) {
+
+ log_link_debug(link, "%sabling can-termination", link->network->can_termination ? "En" : "Dis");
+
+ r = sd_netlink_message_append_u16(m, IFLA_CAN_TERMINATION,
+ link->network->can_termination ? CAN_TERMINATION_OHM_VALUE : 0);
+ if (r < 0)
+ return log_link_error_errno(link, r, "Could not append IFLA_CAN_TERMINATION attribute: %m");
+
+ }
+
r = sd_netlink_message_close_container(m);
if (r < 0)
return log_link_error_errno(link, r, "Failed to close netlink container: %m");
diff --git a/src/network/networkd-network-gperf.gperf b/src/network/networkd-network-gperf.gperf
index d4d108ad25..f6814c2213 100644
--- a/src/network/networkd-network-gperf.gperf
+++ b/src/network/networkd-network-gperf.gperf
@@ -227,6 +227,7 @@ CAN.BitRate, config_parse_si_size,
CAN.SamplePoint, config_parse_permille, 0, offsetof(Network, can_sample_point)
CAN.RestartSec, config_parse_sec, 0, offsetof(Network, can_restart_us)
CAN.TripleSampling, config_parse_tristate, 0, offsetof(Network, can_triple_sampling)
+CAN.Termination, config_parse_tristate, 0, offsetof(Network, can_termination)
/* backwards compatibility: do not add new entries to this section */
Network.IPv4LL, config_parse_ipv4ll, 0, offsetof(Network, link_local)
DHCP.ClientIdentifier, config_parse_dhcp_client_identifier, 0, offsetof(Network, dhcp_client_identifier)
diff --git a/src/network/networkd-network.c b/src/network/networkd-network.c
index 2b8d0eb2fb..00f309b738 100644
--- a/src/network/networkd-network.c
+++ b/src/network/networkd-network.c
@@ -436,6 +436,7 @@ int network_load_one(Manager *manager, const char *filename) {
.keep_configuration = _KEEP_CONFIGURATION_INVALID,
.can_triple_sampling = -1,
+ .can_termination = -1,
};
r = config_parse_many(filename, NETWORK_DIRS, dropin_dirname,
diff --git a/src/network/networkd-network.h b/src/network/networkd-network.h
index bc760744e5..ed803ee746 100644
--- a/src/network/networkd-network.h
+++ b/src/network/networkd-network.h
@@ -170,6 +170,7 @@ struct Network {
unsigned can_sample_point;
usec_t can_restart_us;
int can_triple_sampling;
+ int can_termination;
AddressFamily ip_forward;
bool ip_masquerade;
diff --git a/test/fuzz/fuzz-network-parser/directives.network b/test/fuzz/fuzz-network-parser/directives.network
index 848d4bd187..66a7557f29 100644
--- a/test/fuzz/fuzz-network-parser/directives.network
+++ b/test/fuzz/fuzz-network-parser/directives.network
@@ -183,6 +183,7 @@ SamplePoint=
BitRate=
RestartSec=
TripleSampling=
+Termination=
[Address]
DuplicateAddressDetection=
AutoJoin=
--
2.25.0
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