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networkd: introduce netdev ipvtap

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This patch adds netdev ipvtap that is based on the
IP-VLAN network interface, called ipvtap. An ipvtap device can be created
in the same way as an ipvlan device, using 'kind ipvtap', and then accessed
using the tap user space interface.
This commit is contained in:
Susant Sahani 2019-05-15 15:42:30 +05:30 committed by Yu Watanabe
parent 05dc2132e0
commit 69c317a07f
12 changed files with 46 additions and 4 deletions
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12
man/systemd.netdev.xml
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@ -115,6 +115,9 @@
<row><entry><varname>ipvlan</varname></entry>
<entry>An ipvlan device is a stacked device which receives packets from its underlying device based on IP address filtering.</entry></row>
<row><entry><varname>ipvtap</varname></entry>
<entry>An ipvtap device is a stacked device which receives packets from its underlying device based on IP address filtering and can be accessed using the tap user space interface.</entry></row>
<row><entry><varname>macvlan</varname></entry>
<entry>A macvlan device is a stacked device which receives packets from its underlying device based on MAC address filtering.</entry></row>
@ -519,6 +522,15 @@
</refsect1>
<refsect1>
<title>[IPVTAP] Section Options</title>
<para>The <literal>[IPVTAP]</literal> section only applies for
netdevs of kind <literal>ipvtap</literal> and accepts the
same key as <literal>[IPVLAN]</literal>.</para>
</refsect1>
<refsect1>
<title>[VXLAN] Section Options</title>
<para>The <literal>[VXLAN]</literal> section only applies for

3
src/libsystemd/sd-netlink/netlink-types.c
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@ -337,6 +337,7 @@ static const char* const nl_union_link_info_data_table[] = {
[NL_UNION_LINK_INFO_DATA_MACVLAN] = "macvlan",
[NL_UNION_LINK_INFO_DATA_MACVTAP] = "macvtap",
[NL_UNION_LINK_INFO_DATA_IPVLAN] = "ipvlan",
[NL_UNION_LINK_INFO_DATA_IPVTAP] = "ipvtap",
[NL_UNION_LINK_INFO_DATA_VXLAN] = "vxlan",
[NL_UNION_LINK_INFO_DATA_IPIP_TUNNEL] = "ipip",
[NL_UNION_LINK_INFO_DATA_IPGRE_TUNNEL] = "gre",
@ -375,6 +376,8 @@ static const NLTypeSystem rtnl_link_info_data_type_systems[] = {
.types = rtnl_link_info_data_macvlan_types },
[NL_UNION_LINK_INFO_DATA_IPVLAN] = { .count = ELEMENTSOF(rtnl_link_info_data_ipvlan_types),
.types = rtnl_link_info_data_ipvlan_types },
[NL_UNION_LINK_INFO_DATA_IPVTAP] = { .count = ELEMENTSOF(rtnl_link_info_data_ipvlan_types),
.types = rtnl_link_info_data_ipvlan_types },
[NL_UNION_LINK_INFO_DATA_VXLAN] = { .count = ELEMENTSOF(rtnl_link_info_data_vxlan_types),
.types = rtnl_link_info_data_vxlan_types },
[NL_UNION_LINK_INFO_DATA_IPIP_TUNNEL] = { .count = ELEMENTSOF(rtnl_link_info_data_iptun_types),

1
src/libsystemd/sd-netlink/netlink-types.h
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@ -62,6 +62,7 @@ typedef enum NLUnionLinkInfoData {
NL_UNION_LINK_INFO_DATA_MACVLAN,
NL_UNION_LINK_INFO_DATA_MACVTAP,
NL_UNION_LINK_INFO_DATA_IPVLAN,
NL_UNION_LINK_INFO_DATA_IPVTAP,
NL_UNION_LINK_INFO_DATA_VXLAN,
NL_UNION_LINK_INFO_DATA_IPIP_TUNNEL,
NL_UNION_LINK_INFO_DATA_IPGRE_TUNNEL,

18
src/network/netdev/ipvlan.c
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@ -32,7 +32,10 @@ static int netdev_ipvlan_fill_message_create(NetDev *netdev, Link *link, sd_netl
assert(link);
assert(netdev->ifname);
m = IPVLAN(netdev);
if (netdev->kind == NETDEV_KIND_IPVLAN)
m = IPVLAN(netdev);
else
m = IPVTAP(netdev);
assert(m);
@ -56,7 +59,10 @@ static void ipvlan_init(NetDev *n) {
assert(n);
m = IPVLAN(n);
if (n->kind == NETDEV_KIND_IPVLAN)
m = IPVLAN(n);
else
m = IPVTAP(n);
assert(m);
@ -71,3 +77,11 @@ const NetDevVTable ipvlan_vtable = {
.fill_message_create = netdev_ipvlan_fill_message_create,
.create_type = NETDEV_CREATE_STACKED,
};
const NetDevVTable ipvtap_vtable = {
.object_size = sizeof(IPVlan),
.init = ipvlan_init,
.sections = "Match\0NetDev\0IPVTAP\0",
.fill_message_create = netdev_ipvlan_fill_message_create,
.create_type = NETDEV_CREATE_STACKED,
};

2
src/network/netdev/ipvlan.h
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@ -30,7 +30,9 @@ typedef struct IPVlan {
} IPVlan;
DEFINE_NETDEV_CAST(IPVLAN, IPVlan);
DEFINE_NETDEV_CAST(IPVTAP, IPVlan);
extern const NetDevVTable ipvlan_vtable;
extern const NetDevVTable ipvtap_vtable;
const char *ipvlan_mode_to_string(IPVlanMode d) _const_;
IPVlanMode ipvlan_mode_from_string(const char *d) _pure_;

2
src/network/netdev/netdev-gperf.gperf
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@ -54,6 +54,8 @@ MACVLAN.Mode, config_parse_macvlan_mode,
MACVTAP.Mode, config_parse_macvlan_mode, 0, offsetof(MacVlan, mode)
IPVLAN.Mode, config_parse_ipvlan_mode, 0, offsetof(IPVlan, mode)
IPVLAN.Flags, config_parse_ipvlan_flags, 0, offsetof(IPVlan, flags)
IPVTAP.Mode, config_parse_ipvlan_mode, 0, offsetof(IPVlan, mode)
IPVTAP.Flags, config_parse_ipvlan_flags, 0, offsetof(IPVlan, flags)
Tunnel.Local, config_parse_tunnel_address, 0, offsetof(Tunnel, local)
Tunnel.Remote, config_parse_tunnel_address, 0, offsetof(Tunnel, remote)
Tunnel.TOS, config_parse_unsigned, 0, offsetof(Tunnel, tos)

2
src/network/netdev/netdev.c
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@ -45,6 +45,7 @@ const NetDevVTable * const netdev_vtable[_NETDEV_KIND_MAX] = {
[NETDEV_KIND_MACVLAN] = &macvlan_vtable,
[NETDEV_KIND_MACVTAP] = &macvtap_vtable,
[NETDEV_KIND_IPVLAN] = &ipvlan_vtable,
[NETDEV_KIND_IPVTAP] = &ipvtap_vtable,
[NETDEV_KIND_VXLAN] = &vxlan_vtable,
[NETDEV_KIND_IPIP] = &ipip_vtable,
[NETDEV_KIND_GRE] = &gre_vtable,
@ -78,6 +79,7 @@ static const char* const netdev_kind_table[_NETDEV_KIND_MAX] = {
[NETDEV_KIND_MACVLAN] = "macvlan",
[NETDEV_KIND_MACVTAP] = "macvtap",
[NETDEV_KIND_IPVLAN] = "ipvlan",
[NETDEV_KIND_IPVTAP] = "ipvtap",
[NETDEV_KIND_VXLAN] = "vxlan",
[NETDEV_KIND_IPIP] = "ipip",
[NETDEV_KIND_GRE] = "gre",

1
src/network/netdev/netdev.h
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@ -24,6 +24,7 @@ typedef enum NetDevKind {
NETDEV_KIND_MACVLAN,
NETDEV_KIND_MACVTAP,
NETDEV_KIND_IPVLAN,
NETDEV_KIND_IPVTAP,
NETDEV_KIND_VXLAN,
NETDEV_KIND_IPIP,
NETDEV_KIND_GRE,

1
src/network/networkd-network-gperf.gperf
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@ -44,6 +44,7 @@ Network.VLAN, config_parse_stacked_netdev,
Network.MACVLAN, config_parse_stacked_netdev, NETDEV_KIND_MACVLAN, offsetof(Network, stacked_netdev_names)
Network.MACVTAP, config_parse_stacked_netdev, NETDEV_KIND_MACVTAP, offsetof(Network, stacked_netdev_names)
Network.IPVLAN, config_parse_stacked_netdev, NETDEV_KIND_IPVLAN, offsetof(Network, stacked_netdev_names)
Network.IPVTAP, config_parse_stacked_netdev, NETDEV_KIND_IPVTAP, offsetof(Network, stacked_netdev_names)
Network.VXLAN, config_parse_stacked_netdev, NETDEV_KIND_VXLAN, offsetof(Network, stacked_netdev_names)
Network.L2TP, config_parse_stacked_netdev, NETDEV_KIND_L2TP, offsetof(Network, stacked_netdev_names)
Network.MACsec, config_parse_stacked_netdev, NETDEV_KIND_MACSEC, offsetof(Network, stacked_netdev_names)

4
src/network/networkd-network.c
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@ -708,8 +708,8 @@ int config_parse_stacked_netdev(const char *unit,
assert(data);
assert(IN_SET(kind,
NETDEV_KIND_VLAN, NETDEV_KIND_MACVLAN, NETDEV_KIND_MACVTAP,
NETDEV_KIND_IPVLAN, NETDEV_KIND_VXLAN, NETDEV_KIND_L2TP,
NETDEV_KIND_MACSEC, _NETDEV_KIND_TUNNEL));
NETDEV_KIND_IPVLAN, NETDEV_KIND_IPVTAP, NETDEV_KIND_VXLAN,
NETDEV_KIND_L2TP, NETDEV_KIND_MACSEC, _NETDEV_KIND_TUNNEL));
if (!ifname_valid(rvalue)) {
log_syntax(unit, LOG_ERR, filename, line, 0,

3
test/fuzz/fuzz-netdev-parser/directives.netdev
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@ -151,6 +151,9 @@ VNetHeader=
[IPVLAN]
Mode=
Flags=
[IPVTAP]
Mode=
Flags=
[Tun]
OneQueue=
MultiQueue=

1
test/fuzz/fuzz-network-parser/directives.network
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@ -104,6 +104,7 @@ Tunnel=
Gateway=
IPv4LL=
IPVLAN=
IPVTAP=
EmitLLDP=
IPv6MTUBytes=
IPv4ProxyARP=