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networkd: introduce ipip tunnel

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This patch enables basic ipip tunnel support.
It works with kernel module ipip

example conf:

file: ipip.netdev

[NetDev]
Name=ipip-tun
Kind=ipip
MTUBytes=1480

[Tunnel]
Local=192.168.223.238
Remote=192.169.224.239
TTL=64

file: ipip.network

[Match]
Name=em1

[Network]
Tunnel=ipip-tun

[tomegun:
         - drop unused variable
         - take ref when enslaving]
This commit is contained in:
Susant Sahani 2014-05-12 10:48:24 +05:30 committed by Tom Gundersen
parent 1727a59522
commit 7951dea209
13 changed files with 415 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
Makefile.am
View File

@ -4171,7 +4171,8 @@ systemd_networkd_SOURCES = \
src/network/networkd.c
systemd_networkd_LDADD = \
libsystemd-networkd-core.la
libsystemd-networkd-core.la \
-lkmod
noinst_LTLIBRARIES += \
libsystemd-networkd-core.la
@ -4181,6 +4182,7 @@ libsystemd_networkd_core_la_SOURCES = \
src/network/networkd.h \
src/network/networkd-link.c \
src/network/networkd-netdev.c \
src/network/networkd-tunnel.c \
src/network/networkd-network.c \
src/network/networkd-address.c \
src/network/networkd-route.c \
@ -4217,13 +4219,15 @@ systemd_networkd_wait_online_LDADD = \
libsystemd-network.la \
libudev-internal.la \
libsystemd-internal.la \
libsystemd-shared.la
libsystemd-shared.la \
libsystemd-network.la
test_network_SOURCES = \
src/network/test-network.c
test_network_LDADD = \
libsystemd-networkd-core.la
libsystemd-networkd-core.la \
-lkmod
tests += \
test-network

33
src/libsystemd-network/network-internal.c
View File

@ -326,3 +326,36 @@ int net_parse_inaddr(const char *address, unsigned char *family, void *dst) {
return 0;
}
int load_module(struct kmod_ctx *ctx, const char *mod_name) {
struct kmod_list *modlist = NULL, *l;
int r;
assert(ctx);
assert(mod_name);
r = kmod_module_new_from_lookup(ctx, mod_name, &modlist);
if (r < 0)
return r;
if (!modlist) {
log_error("Failed to find module '%s'", mod_name);
return -ENOENT;
}
kmod_list_foreach(l, modlist) {
struct kmod_module *mod = kmod_module_get_module(l);
r = kmod_module_probe_insert_module(mod, 0, NULL, NULL, NULL, NULL);
if (r == 0)
log_info("Inserted module '%s'", kmod_module_get_name(mod));
else {
log_error("Failed to insert '%s': %s", kmod_module_get_name(mod),
strerror(-r));
}
}
kmod_module_unref_list(modlist);
return r;
}

3
src/libsystemd-network/network-internal.h
View File

@ -24,6 +24,7 @@
#include <netinet/ether.h>
#include <netinet/in.h>
#include <stdbool.h>
#include <libkmod.h>
#include "udev.h"
#include "condition-util.h"
@ -65,3 +66,5 @@ int config_parse_ifalias(const char *unit, const char *filename, unsigned line,
int net_parse_inaddr(const char *address, unsigned char *family, void *dst);
int net_get_unique_predictable_data(struct udev_device *device, uint8_t result[8]);
int load_module(struct kmod_ctx *ctx, const char *mod_name);

4
src/libsystemd/sd-rtnl/rtnl-types.c
View File

@ -104,8 +104,8 @@ static const NLType rtnl_link_info_data_bond_types[IFLA_BOND_MAX + 1] = {
static const NLType rtnl_link_info_data_iptun_types[IFLA_IPTUN_MAX + 1] = {
[IFLA_IPTUN_LINK] = { .type = NLA_U32 },
[IFLA_IPTUN_LOCAL] = { .type = NLA_U32 },
[IFLA_IPTUN_REMOTE] = { .type = NLA_U32 },
[IFLA_IPTUN_LOCAL] = { .type = NLA_IN_ADDR },
[IFLA_IPTUN_REMOTE] = { .type = NLA_IN_ADDR },
[IFLA_IPTUN_TTL] = { .type = NLA_U8 },
[IFLA_IPTUN_TOS] = { .type = NLA_U8 },
[IFLA_IPTUN_PMTUDISC] = { .type = NLA_U8 },

26
src/network/networkd-link.c
View File

@ -1466,7 +1466,9 @@ static int link_enter_enslave(Link *link) {
link_save(link);
if (!link->network->bridge && !link->network->bond &&
if (!link->network->bridge &&
!link->network->bond &&
!link->network->tunnel &&
hashmap_isempty(link->network->vlans) &&
hashmap_isempty(link->network->macvlans))
return link_enslaved(link);
@ -1515,6 +1517,28 @@ static int link_enter_enslave(Link *link) {
link->enslaving ++;
}
if (link->network->tunnel) {
log_struct_link(LOG_DEBUG, link,
"MESSAGE=%s: enslaving by '%s'",
link->ifname, link->network->tunnel->name,
NETDEV(link->network->tunnel),
NULL);
r = netdev_enslave(link->network->tunnel, link, &enslave_handler);
if (r < 0) {
log_struct_link(LOG_WARNING, link,
"MESSAGE=%s: could not enslave by '%s': %s",
link->ifname, link->network->tunnel->name, strerror(-r),
NETDEV(link->network->tunnel),
NULL);
link_enter_failed(link);
return r;
}
link_ref(link);
link->enslaving ++;
}
HASHMAP_FOREACH(vlan, link->network->vlans, i) {
log_struct_link(LOG_DEBUG, link,
"MESSAGE=%s: enslaving by '%s'",

16
src/network/networkd-manager.c
View File

@ -21,6 +21,7 @@
#include <resolv.h>
#include <linux/if.h>
#include <libkmod.h>
#include "path-util.h"
#include "networkd.h"
@ -551,3 +552,18 @@ finish:
return r;
}
int manager_init_kmod_ctx(Manager *m) {
struct kmod_ctx *ctx;
assert(m);
ctx = kmod_new(NULL, NULL);
if (!ctx) {
return -ENOMEM;
}
m->kmod_ctx = ctx;
return 0;
}

5
src/network/networkd-netdev-gperf.gperf
View File

@ -22,5 +22,10 @@ Match.Architecture, config_parse_net_condition, CONDITION_ARCHITECT
NetDev.Description, config_parse_string, 0, offsetof(NetDev, description)
NetDev.Name, config_parse_ifname, 0, offsetof(NetDev, name)
NetDev.Kind, config_parse_netdev_kind, 0, offsetof(NetDev, kind)
NetDev.MTUBytes, config_parse_iec_size, 0, offsetof(NetDev, mtu)
VLAN.Id, config_parse_uint64, 0, offsetof(NetDev, vlanid)
MACVLAN.Mode, config_parse_macvlan_mode, 0, offsetof(NetDev, macvlan_mode)
Tunnel.Local, config_parse_tunnel_address, 0, offsetof(NetDev, tunnel_local)
Tunnel.Remote, config_parse_tunnel_address, 0, offsetof(NetDev, tunnel_remote)
Tunnel.TOS, config_parse_unsigned, 0, offsetof(NetDev, tunnel_tos)
Tunnel.TTL, config_parse_unsigned, 0, offsetof(NetDev, tunnel_ttl)

53
src/network/networkd-netdev.c
View File

@ -33,6 +33,9 @@ static const char* const netdev_kind_table[_NETDEV_KIND_MAX] = {
[NETDEV_KIND_BOND] = "bond",
[NETDEV_KIND_VLAN] = "vlan",
[NETDEV_KIND_MACVLAN] = "macvlan",
[NETDEV_KIND_IPIP] = "ipip",
[NETDEV_KIND_GRE] = "gre",
[NETDEV_KIND_SIT] = "sit",
};
DEFINE_STRING_TABLE_LOOKUP(netdev_kind, NetDevKind);
@ -228,6 +231,34 @@ static int netdev_create_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userda
return 1;
}
int config_parse_tunnel_address(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) {
NetDev *n = data;
unsigned char family = AF_INET;
int r;
assert(filename);
assert(lvalue);
assert(rvalue);
assert(data);
r = net_parse_inaddr(rvalue, &family, n);
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, EINVAL,
"Tunnel address is invalid, ignoring assignment: %s", rvalue);
return 0;
}
return 0;
}
static int netdev_create(NetDev *netdev, Link *link, sd_rtnl_message_handler_t callback) {
_cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL;
const char *kind;
@ -266,6 +297,16 @@ static int netdev_create(NetDev *netdev, Link *link, sd_rtnl_message_handler_t c
return r;
}
if(netdev->mtu) {
r = sd_rtnl_message_append_u32(req, IFLA_MTU, netdev->mtu);
if (r < 0) {
log_error_netdev(netdev,
"Could not append IFLA_MTU attribute: %s",
strerror(-r));
return r;
}
}
r = sd_rtnl_message_open_container(req, IFLA_LINKINFO);
if (r < 0) {
log_error_netdev(netdev,
@ -347,6 +388,11 @@ int netdev_enslave(NetDev *netdev, Link *link, sd_rtnl_message_handler_t callbac
if (netdev->kind == NETDEV_KIND_VLAN || netdev->kind == NETDEV_KIND_MACVLAN)
return netdev_create(netdev, link, callback);
if(netdev->kind == NETDEV_KIND_IPIP ||
netdev->kind == NETDEV_KIND_GRE ||
netdev->kind == NETDEV_KIND_SIT)
return netdev_create_tunnel(link, netdev_create_handler);
if (netdev->state == NETDEV_STATE_READY) {
r = netdev_enslave_ready(netdev, link, callback);
if (r < 0)
@ -496,7 +542,7 @@ static int netdev_load_one(Manager *manager, const char *filename) {
netdev->macvlan_mode = _NETDEV_MACVLAN_MODE_INVALID;
netdev->vlanid = VLANID_MAX + 1;
r = config_parse(NULL, filename, file, "Match\0NetDev\0VLAN\0MACVLAN\0",
r = config_parse(NULL, filename, file, "Match\0NetDev\0VLAN\0MACVLAN\0Tunnel\0",
config_item_perf_lookup, (void*) network_netdev_gperf_lookup,
false, false, netdev);
if (r < 0) {
@ -549,7 +595,10 @@ static int netdev_load_one(Manager *manager, const char *filename) {
LIST_HEAD_INIT(netdev->callbacks);
if (netdev->kind != NETDEV_KIND_VLAN &&
netdev->kind != NETDEV_KIND_MACVLAN) {
netdev->kind != NETDEV_KIND_MACVLAN &&
netdev->kind != NETDEV_KIND_IPIP &&
netdev->kind != NETDEV_KIND_GRE &&
netdev->kind != NETDEV_KIND_SIT) {
r = netdev_create(netdev, NULL, NULL);
if (r < 0)
return r;

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

@ -34,6 +34,7 @@ Network.IPv4LL, config_parse_bool, 0,
Network.Address, config_parse_address, 0, 0
Network.Gateway, config_parse_gateway, 0, 0
Network.DNS, config_parse_dns, 0, offsetof(Network, dns)
Network.Tunnel, config_parse_tunnel, 0, offsetof(Network, tunnel)
Address.Address, config_parse_address, 0, 0
Address.Broadcast, config_parse_broadcast, 0, 0
Address.Label, config_parse_label, 0, 0

39
src/network/networkd-network.c
View File

@ -331,3 +331,42 @@ int config_parse_netdev(const char *unit,
return 0;
}
int config_parse_tunnel(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;
NetDev *netdev;
int r;
assert(filename);
assert(lvalue);
assert(rvalue);
assert(data);
r = netdev_get(network->manager, rvalue, &netdev);
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, EINVAL,
"Tunnel is invalid, ignoring assignment: %s", rvalue);
return 0;
}
if (netdev->kind != NETDEV_KIND_IPIP &&
netdev->kind != NETDEV_KIND_SIT &&
netdev->kind != NETDEV_KIND_GRE) {
log_syntax(unit, LOG_ERR, filename, line, EINVAL,
"NetDev is not a tunnel, ignoring assignment: %s", rvalue);
return 0;
}
network->tunnel = netdev;
return 0;
}

192
src/network/networkd-tunnel.c Normal file
View File

@ -0,0 +1,192 @@
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2014 Susant Sahani <susant@redhat.com>
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <netinet/ether.h>
#include <arpa/inet.h>
#include <net/if.h>
#include <linux/ip.h>
#include <linux/if_tunnel.h>
#include <libkmod.h>
#include "sd-rtnl.h"
#include "networkd.h"
#include "network-internal.h"
#include "util.h"
static int netdev_fill_ipip_rtnl_message(Link *link, sd_rtnl_message *m) {
NetDev *netdev;
int r;
assert(link);
assert(link->network);
assert(link->network->tunnel);
assert(m);
netdev = link->network->tunnel;
r = sd_rtnl_message_append_string(m, IFLA_IFNAME, netdev->name);
if (r < 0) {
log_error_netdev(netdev,
"Could not append IFLA_IFNAME, attribute: %s",
strerror(-r));
return r;
}
if(netdev->mtu) {
r = sd_rtnl_message_append_u32(m, IFLA_MTU, netdev->mtu);
if (r < 0) {
log_error_netdev(netdev,
"Could not append IFLA_MTU attribute: %s",
strerror(-r));
return r;
}
}
r = sd_rtnl_message_open_container(m, IFLA_LINKINFO);
if (r < 0) {
log_error_netdev(netdev,
"Could not append IFLA_LINKINFO attribute: %s",
strerror(-r));
return r;
}
r = sd_rtnl_message_open_container_union(m, IFLA_INFO_DATA,
netdev_kind_to_string(netdev->kind));
if (r < 0) {
log_error_netdev(netdev,
"Could not append IFLA_INFO_DATA attribute: %s",
strerror(-r));
return r;
}
r = sd_rtnl_message_append_u32(m, IFLA_IPTUN_LINK, link->ifindex);
if (r < 0) {
log_error_netdev(netdev,
"Could not append IFLA_IPTUN_LINK attribute: %s",
strerror(-r));
return r;
}
r = sd_rtnl_message_append_in_addr(m, IFLA_IPTUN_LOCAL, &netdev->tunnel_local);
if (r < 0) {
log_error_netdev(netdev,
"Could not append IFLA_IPTUN_LOCAL attribute: %s",
strerror(-r));
return r;
}
r = sd_rtnl_message_append_in_addr(m, IFLA_IPTUN_REMOTE, &netdev->tunnel_remote);
if (r < 0) {
log_error_netdev(netdev,
"Could not append IFLA_IPTUN_REMOTE attribute: %s",
strerror(-r));
return r;
}
r = sd_rtnl_message_close_container(m);
if (r < 0) {
log_error_netdev(netdev,
"Could not append IFLA_INFO_DATA attribute: %s",
strerror(-r));
return r;
}
r = sd_rtnl_message_close_container(m);
if (r < 0) {
log_error_netdev(netdev,
"Could not append IFLA_LINKINFO attribute: %s",
strerror(-r));
return r;
}
return r;
}
int netdev_create_tunnel(Link *link, sd_rtnl_message_handler_t callback) {
_cleanup_rtnl_message_unref_ sd_rtnl_message *m = NULL;
NetDev *netdev;
int r;
assert(link);
assert(link->network);
assert(link->network->tunnel);
netdev = link->network->tunnel;
assert(netdev);
assert(netdev->name);
assert(netdev->manager);
assert(netdev->manager->rtnl);
assert(netdev->manager->kmod_ctx);
/* Load kernel module first */
switch(netdev->kind) {
case NETDEV_KIND_IPIP:
case NETDEV_KIND_GRE:
case NETDEV_KIND_SIT:
r = load_module(netdev->manager->kmod_ctx,
netdev_kind_to_string(netdev->kind));
if (r < 0) {
log_error_netdev(netdev,
"Could not load Kernel module: %s . Ignoring",
netdev_kind_to_string(netdev->kind));
return r;
}
break;
default:
return -ENOTSUP;
}
r = sd_rtnl_message_new_link(netdev->manager->rtnl, &m, RTM_NEWLINK, 0);
if (r < 0) {
log_error_netdev(netdev,
"Could not allocate RTM_NEWLINK message: %s",
strerror(-r));
return r;
}
switch(netdev->kind) {
case NETDEV_KIND_IPIP:
r = netdev_fill_ipip_rtnl_message(link, m);
if(r < 0)
return r;
break;
case NETDEV_KIND_GRE:
case NETDEV_KIND_SIT:
default:
return -ENOTSUP;
}
r = sd_rtnl_call_async(netdev->manager->rtnl, m, callback, netdev, 0, NULL);
if (r < 0) {
log_error_netdev(netdev,
"Could not send rtnetlink message: %s", strerror(-r));
return r;
}
log_debug_netdev(netdev, "Creating tunnel netdev: %s",
netdev_kind_to_string(netdev->kind));
netdev->state = NETDEV_STATE_CREATING;
return 0;
}

6
src/network/networkd.c
View File

@ -87,6 +87,12 @@ int main(int argc, char *argv[]) {
goto out;
}
r = manager_init_kmod_ctx(m);
if (r < 0) {
log_error("Could not init kmod context: %s", strerror(-r));
goto out;
}
r = manager_rtnl_enumerate_links(m);
if (r < 0) {
log_error("Could not enumerate links: %s", strerror(-r));

35
src/network/networkd.h
View File

@ -68,6 +68,9 @@ typedef enum NetDevKind {
NETDEV_KIND_BOND,
NETDEV_KIND_VLAN,
NETDEV_KIND_MACVLAN,
NETDEV_KIND_IPIP,
NETDEV_KIND_GRE,
NETDEV_KIND_SIT,
_NETDEV_KIND_MAX,
_NETDEV_KIND_INVALID = -1
} NetDevKind;
@ -95,6 +98,7 @@ struct NetDev {
char *description;
char *name;
size_t mtu;
NetDevKind kind;
uint64_t vlanid;
@ -103,6 +107,11 @@ struct NetDev {
int ifindex;
NetDevState state;
unsigned tunnel_ttl;
unsigned tunnel_tos;
struct in_addr tunnel_local;
struct in_addr tunnel_remote;
LIST_HEAD(netdev_enslave_callback, callbacks);
};
@ -124,6 +133,7 @@ struct Network {
char *description;
NetDev *bridge;
NetDev *bond;
NetDev *tunnel;
Hashmap *vlans;
Hashmap *macvlans;
bool dhcp;
@ -246,6 +256,7 @@ struct Manager {
LIST_HEAD(Network, networks);
usec_t network_dirs_ts_usec;
struct kmod_ctx *kmod_ctx;
};
extern const char* const network_dirs[];
@ -266,6 +277,7 @@ int manager_bus_listen(Manager *m);
int manager_update_resolv_conf(Manager *m);
int manager_save(Manager *m);
int manager_init_kmod_ctx(Manager *m);
DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
#define _cleanup_manager_free_ _cleanup_(manager_freep)
@ -284,6 +296,7 @@ DEFINE_TRIVIAL_CLEANUP_FUNC(NetDev*, netdev_unref);
int netdev_get(Manager *manager, const char *name, NetDev **ret);
int netdev_set_ifindex(NetDev *netdev, sd_rtnl_message *newlink);
int netdev_enslave(NetDev *netdev, Link *link, sd_rtnl_message_handler_t cb);
int netdev_create_tunnel(Link *link, sd_rtnl_message_handler_t callback);
const char *netdev_kind_to_string(NetDevKind d) _const_;
NetDevKind netdev_kind_from_string(const char *d) _pure_;
@ -316,6 +329,28 @@ int config_parse_netdev(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);
int config_parse_tunnel(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);
int config_parse_tunnel_address(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);
/* gperf */
const struct ConfigPerfItem* network_network_gperf_lookup(const char *key, unsigned length);