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networkd: VXLAN add support to configure port
This patch add support to configure port PortRange: VXLAN bases source UDP port based on flow to help the receiver to be able to load balance based on outer header flow. DestinatinPort: Allow configuring the default destination port on a per-device basis.
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@ -493,6 +493,25 @@
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VXLAN Group Policy </ulink> document. Defaults to false.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>DestinationPort=</varname></term>
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<listitem>
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<para>Configures the default destination UDP port on a per-device basis.
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If destination port is not specified then Linux kernel default will be used.
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Set destination port 4789 to get the IANA assigned value,
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and destination port 0 to get default values.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>PortRange=</varname></term>
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<listitem>
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<para>Configures VXLAN port range. VXLAN bases source
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UDP port based on flow to help the receiver to be able
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to load balance based on outer header flow. It
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restricts the port range to the normal UDP local
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ports, and allows overriding via configuration.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1>
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@ -57,6 +57,8 @@ VXLAN.UDP6ZeroCheckSumTx, config_parse_bool, 0,
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VXLAN.FDBAgeingSec, config_parse_sec, 0, offsetof(VxLan, fdb_ageing)
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VXLAN.GroupPolicyExtension, config_parse_bool, 0, offsetof(VxLan, group_policy)
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VXLAN.MaximumFDBEntries, config_parse_unsigned, 0, offsetof(VxLan, max_fdb)
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VXLAN.PortRange, config_parse_port_range, 0, 0
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VXLAN.DestinationPort, config_parse_destination_port, 0, offsetof(VxLan, dest_port)
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Tun.OneQueue, config_parse_bool, 0, offsetof(TunTap, one_queue)
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Tun.MultiQueue, config_parse_bool, 0, offsetof(TunTap, multi_queue)
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Tun.PacketInfo, config_parse_bool, 0, offsetof(TunTap, packet_info)
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@ -24,6 +24,8 @@
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#include "sd-netlink.h"
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#include "conf-parser.h"
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#include "alloc-util.h"
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#include "parse-util.h"
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#include "missing.h"
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#include "networkd-link.h"
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#include "networkd-netdev-vxlan.h"
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@ -110,6 +112,21 @@ static int netdev_vxlan_fill_message_create(NetDev *netdev, Link *link, sd_netli
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if (r < 0)
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return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_UDP_ZERO_CSUM6_RX attribute: %m");
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r = sd_netlink_message_append_u16(m, IFLA_VXLAN_PORT, htobe16(v->dest_port));
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if (r < 0)
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return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_PORT attribute: %m");
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if (v->port_range.low || v->port_range.high) {
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struct ifla_vxlan_port_range port_range;
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port_range.low = htobe16(v->port_range.low);
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port_range.high = htobe16(v->port_range.high);
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r = sd_netlink_message_append_data(m, IFLA_VXLAN_PORT_RANGE, &port_range, sizeof(port_range));
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if (r < 0)
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return log_netdev_error_errno(netdev, r, "Could not append IFLA_VXLAN_PORT_RANGE attribute: %m");
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}
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if (v->group_policy) {
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r = sd_netlink_message_append_flag(m, IFLA_VXLAN_GBP);
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if (r < 0)
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@ -155,6 +172,89 @@ int config_parse_vxlan_group_address(const char *unit,
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return 0;
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}
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int config_parse_port_range(const char *unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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_cleanup_free_ char *word = NULL;
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VxLan *v = userdata;
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unsigned low, high;
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int r;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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assert(data);
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r = extract_first_word(&rvalue, &word, NULL, 0);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, r, "Failed to extract VXLAN port range, ignoring: %s", rvalue);
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return 0;
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}
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if (r == 0)
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return 0;
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r = parse_range(word, &low, &high);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse VXLAN port range '%s'", word);
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return 0;
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}
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if (low <= 0 || low > 65535 || high <= 0 || high > 65535) {
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log_syntax(unit, LOG_ERR, filename, line, r,
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"Failed to parse VXLAN port range '%s'. Port should be greater than 0 and less than 65535.", word);
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return 0;
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}
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if (high < low) {
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log_syntax(unit, LOG_ERR, filename, line, r,
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"Failed to parse VXLAN port range '%s'. Port range %u .. %u not valid", word, low, high);
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return 0;
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}
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v->port_range.low = low;
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v->port_range.high = high;
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return 0;
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}
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int config_parse_destination_port(const char *unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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VxLan *v = userdata;
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uint16_t port;
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int r;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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assert(data);
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r = safe_atou16(rvalue, &port);
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if (r < 0 || port <= 0) {
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log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse VXLAN destination port '%s'.", rvalue);
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return 0;
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}
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v->dest_port = port;
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return 0;
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}
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static int netdev_vxlan_verify(NetDev *netdev, const char *filename) {
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VxLan *v = VXLAN(netdev);
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@ -40,6 +40,8 @@ struct VxLan {
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unsigned ttl;
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unsigned max_fdb;
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uint16_t dest_port;
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usec_t fdb_ageing;
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bool learning;
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@ -51,6 +53,8 @@ struct VxLan {
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bool udp6zerocsumtx;
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bool udp6zerocsumrx;
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bool group_policy;
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struct ifla_vxlan_port_range port_range;
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};
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extern const NetDevVTable vxlan_vtable;
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@ -65,3 +69,24 @@ int config_parse_vxlan_group_address(const char *unit,
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const char *rvalue,
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void *data,
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void *userdata);
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int config_parse_port_range(const char *unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata);
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int config_parse_destination_port(const char *unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata);
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