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network: Route - allow to set TCP RTO

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This commit is contained in:
Susant Sahani 2023-08-17 17:37:14 +05:30
parent 5f22d16bb3
commit 1412d4a4fe
4 changed files with 70 additions and 0 deletions
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9
man/systemd.network.xml
View file

@ -1719,6 +1719,15 @@ allow my_server_t localnet_peer_t:peer recv;</programlisting>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>TCPRetransmissionTimeOutSec=</varname></term>
<listitem>
<para>Specifies the TCP Retransmission Time Out for the route. Takes time values in seconds.
This value specifies the timeout of an alive TCP connection, when RTO retransmissions remain unacknowledged.
When unset, the kernel's default will be used.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>MultiPathRoute=<replaceable>address</replaceable>[@<replaceable>name</replaceable>] [<replaceable>weight</replaceable>]</varname></term>
<listitem>

1
src/network/networkd-network-gperf.gperf
View file

@ -196,6 +196,7 @@ Route.GatewayOnlink, config_parse_route_boolean,
Route.IPv6Preference, config_parse_ipv6_route_preference, 0, 0
Route.Protocol, config_parse_route_protocol, 0, 0
Route.Type, config_parse_route_type, 0, 0
Route.TCPRetransmissionTimeOutSec, config_parse_route_tcp_rto, 0, 0
Route.InitialCongestionWindow, config_parse_route_tcp_window, 0, 0
Route.InitialAdvertisedReceiveWindow, config_parse_route_tcp_window, 0, 0
Route.TCPAdvertisedMaximumSegmentSize, config_parse_tcp_advmss, 0, 0

58
src/network/networkd-route.c
View file

@ -1247,6 +1247,12 @@ static int route_configure(const Route *route, uint32_t lifetime_sec, Link *link
return r;
}
if (route->tcp_rto_usec > 0) {
r = sd_netlink_message_append_u32(m, RTAX_RTO_MIN, route->tcp_rto_usec / USEC_PER_MSEC);
if (r < 0)
return r;
}
r = sd_netlink_message_close_container(m);
if (r < 0)
return r;
@ -2752,6 +2758,58 @@ int config_parse_route_mtu(
return 0;
}
int config_parse_route_tcp_rto(
const char *unit,
const char *filename,
unsigned line,
const char *section,
unsigned section_line,
const char *lvalue,
int ltype,
const char *rvalue,
void *data,
void *userdata) {
Network *network = userdata;
_cleanup_(route_free_or_set_invalidp) Route *n = NULL;
usec_t usec;
int r;
assert(filename);
assert(section);
assert(lvalue);
assert(rvalue);
assert(data);
r = route_new_static(network, filename, section_line, &n);
if (r == -ENOMEM)
return log_oom();
if (r < 0) {
log_syntax(unit, LOG_WARNING, filename, line, r,
"Failed to allocate route, ignoring assignment: %m");
return 0;
}
r = parse_sec(rvalue, &usec);
if (r < 0) {
log_syntax(unit, LOG_WARNING, filename, line, r,
"Failed to parse route TCP retransmission time out (RTO) sec '%s', ignoring: %m", rvalue);
return 0;
}
if (usec != USEC_INFINITY &&
DIV_ROUND_UP(usec, USEC_PER_SEC) > UINT32_MAX) {
log_syntax(unit, LOG_WARNING, filename, line, 0,
"Route TCP retransmission time out (RTO) = must be in the range 0...%"PRIu32"ms, ignoring: %s", UINT32_MAX, rvalue);
return 0;
}
n->tcp_rto_usec = usec;
TAKE_PTR(n);
return 0;
}
int config_parse_multipath_route(
const char *unit,
const char *filename,

2
src/network/networkd-route.h
View file

@ -56,6 +56,7 @@ struct Route {
unsigned flags;
int gateway_onlink; /* Only used in conf parser and route_section_verify(). */
uint32_t nexthop_id;
usec_t tcp_rto_usec;
bool scope_set:1;
bool table_set:1;
@ -125,6 +126,7 @@ CONFIG_PARSER_PROTOTYPE(config_parse_route_protocol);
CONFIG_PARSER_PROTOTYPE(config_parse_route_type);
CONFIG_PARSER_PROTOTYPE(config_parse_route_tcp_window);
CONFIG_PARSER_PROTOTYPE(config_parse_tcp_window);
CONFIG_PARSER_PROTOTYPE(config_parse_route_tcp_rto);
CONFIG_PARSER_PROTOTYPE(config_parse_route_mtu);
CONFIG_PARSER_PROTOTYPE(config_parse_multipath_route);
CONFIG_PARSER_PROTOTYPE(config_parse_tcp_congestion);