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networkd: VXLAN support keyword 'inherit' for TTL

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This commit is contained in:
Susant Sahani 2019-05-10 17:35:24 +05:30 committed by Yu Watanabe
parent cd43199671
commit f4a8ca329a
4 changed files with 53 additions and 6 deletions
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8
man/systemd.netdev.xml
View file

@ -559,10 +559,10 @@
<varlistentry>
<term><varname>TTL=</varname></term>
<listitem>
<para>A fixed Time To Live N on Virtual eXtensible Local
Area Network packets. N is a number in the range 1–255. 0
is a special value meaning that packets inherit the TTL
value.</para>
<para>A fixed Time To Live N on Virtual eXtensible Local Area Network packets.
Takes <literal>inherit</literal> or a number in the range 0–255. 0 is a special
value meaning inherit the inner protocol's TTL value. <literal>inherit</literal>
means that it will inherit the outer protocol's TTL value.</para>
</listitem>
</varlistentry>
<varlistentry>

2
src/network/netdev/netdev-gperf.gperf
View file

@ -102,7 +102,7 @@ VXLAN.Group, config_parse_vxlan_address,
VXLAN.Local, config_parse_vxlan_address, 0, offsetof(VxLan, local)
VXLAN.Remote, config_parse_vxlan_address, 0, offsetof(VxLan, remote)
VXLAN.TOS, config_parse_unsigned, 0, offsetof(VxLan, tos)
VXLAN.TTL, config_parse_unsigned, 0, offsetof(VxLan, ttl)
VXLAN.TTL, config_parse_vxlan_ttl, 0, offsetof(VxLan, ttl)
VXLAN.MacLearning, config_parse_bool, 0, offsetof(VxLan, learning)
VXLAN.ARPProxy, config_parse_bool, 0, offsetof(VxLan, arp_proxy)
VXLAN.ReduceARPProxy, config_parse_bool, 0, offsetof(VxLan, arp_proxy)

47
src/network/netdev/vxlan.c
View file

@ -65,7 +65,11 @@ static int netdev_vxlan_fill_message_create(NetDev *netdev, Link *link, sd_netli
if (r < 0)
return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_LINK attribute: %m");
if (v->ttl != 0) {
if (v->inherit) {
r = sd_netlink_message_append_flag(m, IFLA_VXLAN_TTL_INHERIT);
if (r < 0)
return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_TTL_INHERIT attribute: %m");
} else {
r = sd_netlink_message_append_u8(m, IFLA_VXLAN_TTL, v->ttl);
if (r < 0)
return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_TTL attribute: %m");
@ -288,6 +292,47 @@ int config_parse_flow_label(const char *unit,
return 0;
}
int config_parse_vxlan_ttl(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) {
VxLan *v = userdata;
unsigned f;
int r;
assert(filename);
assert(lvalue);
assert(rvalue);
assert(data);
if (streq(rvalue, "inherit"))
v->inherit = true;
else {
r = safe_atou(rvalue, &f);
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, r,
"Failed to parse VXLAN TTL '%s', ignoring assignment: %m", rvalue);
return 0;
}
if (f > 255) {
log_syntax(unit, LOG_ERR, filename, line, 0,
"Invalid VXLAN TTL '%s'. TTL must be <= 255. Ignoring assignment.", rvalue);
return 0;
}
v->ttl = f;
}
return 0;
}
static int netdev_vxlan_verify(NetDev *netdev, const char *filename) {
VxLan *v = VXLAN(netdev);

2
src/network/netdev/vxlan.h
View file

@ -55,6 +55,7 @@ struct VxLan {
bool remote_csum_rx;
bool group_policy;
bool generic_protocol_extension;
bool inherit;
struct ifla_vxlan_port_range port_range;
};
@ -69,3 +70,4 @@ CONFIG_PARSER_PROTOTYPE(config_parse_vxlan_address);
CONFIG_PARSER_PROTOTYPE(config_parse_port_range);
CONFIG_PARSER_PROTOTYPE(config_parse_flow_label);
CONFIG_PARSER_PROTOTYPE(config_parse_df);
CONFIG_PARSER_PROTOTYPE(config_parse_vxlan_ttl);