#include <net/if.h>
-#include "networkd.h"
+#include "networkd-netdev.h"
+#include "networkd-netdev-bridge.h"
+#include "networkd-netdev-bond.h"
+#include "networkd-netdev-vlan.h"
+#include "networkd-netdev-macvlan.h"
+#include "networkd-netdev-vxlan.h"
+#include "networkd-netdev-tunnel.h"
+#include "networkd-netdev-veth.h"
+#include "networkd-netdev-dummy.h"
+#include "networkd-netdev-tuntap.h"
#include "network-internal.h"
#include "path-util.h"
#include "conf-files.h"
#include "conf-parser.h"
#include "list.h"
-
-#define VLANID_MAX 4094
+#include "siphash24.h"
+
+const NetDevVTable * const netdev_vtable[_NETDEV_KIND_MAX] = {
+ [NETDEV_KIND_BRIDGE] = &bridge_vtable,
+ [NETDEV_KIND_BOND] = &bond_vtable,
+ [NETDEV_KIND_VLAN] = &vlan_vtable,
+ [NETDEV_KIND_MACVLAN] = &macvlan_vtable,
+ [NETDEV_KIND_VXLAN] = &vxlan_vtable,
+ [NETDEV_KIND_IPIP] = &ipip_vtable,
+ [NETDEV_KIND_GRE] = &gre_vtable,
+ [NETDEV_KIND_SIT] = &sit_vtable,
+ [NETDEV_KIND_VTI] = &vti_vtable,
+ [NETDEV_KIND_VETH] = &veth_vtable,
+ [NETDEV_KIND_DUMMY] = &dummy_vtable,
+ [NETDEV_KIND_TUN] = &tun_vtable,
+ [NETDEV_KIND_TAP] = &tap_vtable,
+};
static const char* const netdev_kind_table[_NETDEV_KIND_MAX] = {
[NETDEV_KIND_BRIDGE] = "bridge",
[NETDEV_KIND_BOND] = "bond",
[NETDEV_KIND_VLAN] = "vlan",
[NETDEV_KIND_MACVLAN] = "macvlan",
+ [NETDEV_KIND_VXLAN] = "vxlan",
[NETDEV_KIND_IPIP] = "ipip",
[NETDEV_KIND_GRE] = "gre",
[NETDEV_KIND_SIT] = "sit",
[NETDEV_KIND_VETH] = "veth",
+ [NETDEV_KIND_VTI] = "vti",
+ [NETDEV_KIND_DUMMY] = "dummy",
+ [NETDEV_KIND_TUN] = "tun",
+ [NETDEV_KIND_TAP] = "tap",
};
DEFINE_STRING_TABLE_LOOKUP(netdev_kind, NetDevKind);
DEFINE_CONFIG_PARSE_ENUM(config_parse_netdev_kind, netdev_kind, NetDevKind, "Failed to parse netdev kind");
-static const char* const macvlan_mode_table[_NETDEV_MACVLAN_MODE_MAX] = {
- [NETDEV_MACVLAN_MODE_PRIVATE] = "private",
- [NETDEV_MACVLAN_MODE_VEPA] = "vepa",
- [NETDEV_MACVLAN_MODE_BRIDGE] = "bridge",
- [NETDEV_MACVLAN_MODE_PASSTHRU] = "passthru",
-};
-
-DEFINE_STRING_TABLE_LOOKUP(macvlan_mode, MacVlanMode);
-DEFINE_CONFIG_PARSE_ENUM(config_parse_macvlan_mode, macvlan_mode, MacVlanMode, "Failed to parse macvlan mode");
static void netdev_cancel_callbacks(NetDev *netdev) {
_cleanup_rtnl_message_unref_ sd_rtnl_message *m = NULL;
- netdev_enslave_callback *callback;
+ netdev_join_callback *callback;
if (!netdev)
return;
free(netdev->description);
free(netdev->ifname);
+ free(netdev->ifname_peer);
+ free(netdev->mac);
+ free(netdev->mac_peer);
+ free(netdev->user_name);
+ free(netdev->group_name);
condition_free_list(netdev->match_host);
condition_free_list(netdev->match_virt);
assert(netdev->state == NETDEV_STATE_READY);
assert(netdev->manager);
assert(netdev->manager->rtnl);
+ assert(IN_SET(netdev->kind, NETDEV_KIND_BRIDGE, NETDEV_KIND_BOND));
assert(link);
assert(callback);
return r;
}
+ link_ref(link);
+
log_debug_netdev(netdev, "enslaving link '%s'", link->ifname);
return 0;
}
static int netdev_enter_ready(NetDev *netdev) {
- netdev_enslave_callback *callback;
+ netdev_join_callback *callback, *callback_next;
+ int r;
assert(netdev);
assert(netdev->ifname);
log_info_netdev(netdev, "netdev ready");
- LIST_FOREACH(callbacks, callback, netdev->callbacks) {
+ LIST_FOREACH_SAFE(callbacks, callback, callback_next, netdev->callbacks) {
/* enslave the links that were attempted to be enslaved before the
* link was ready */
- netdev_enslave_ready(netdev, callback->link, callback->callback);
+ r = netdev_enslave_ready(netdev, callback->link, callback->callback);
+ if (r < 0)
+ return r;
+
+ LIST_REMOVE(callbacks, netdev->callbacks, callback);
+ link_unref(callback->link);
+ free(callback);
}
return 0;
}
+
+/* callback for netdev's created without a backing Link */
static int netdev_create_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
- NetDev *netdev = userdata;
+ _cleanup_netdev_unref_ NetDev *netdev = userdata;
int r;
assert(netdev->state != _NETDEV_STATE_INVALID);
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 netdev_enslave(NetDev *netdev, Link *link, sd_rtnl_message_handler_t callback) {
int r;
- assert(filename);
- assert(lvalue);
- assert(rvalue);
- assert(data);
+ assert(netdev);
+ assert(IN_SET(netdev->kind, NETDEV_KIND_BRIDGE, NETDEV_KIND_BOND));
- 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;
+ if (netdev->state == NETDEV_STATE_READY) {
+ r = netdev_enslave_ready(netdev, link, callback);
+ if (r < 0)
+ return r;
+ } else {
+ /* the netdev is not yet read, save this request for when it is*/
+ netdev_join_callback *cb;
+
+ cb = new0(netdev_join_callback, 1);
+ if (!cb)
+ return log_oom();
+
+ cb->callback = callback;
+ cb->link = link;
+ link_ref(link);
+
+ LIST_PREPEND(callbacks, netdev->callbacks, cb);
}
- 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;
+/* the callback must be called, possibly after a timeout, as otherwise the Link will hang */
+int netdev_join(NetDev *netdev, Link *link, sd_rtnl_message_handler_t callback) {
int r;
assert(netdev);
- assert(!(netdev->kind == NETDEV_KIND_VLAN || netdev->kind == NETDEV_KIND_MACVLAN) ||
- (link && callback));
- assert(netdev->ifname);
assert(netdev->manager);
assert(netdev->manager->rtnl);
+ assert(NETDEV_VTABLE(netdev));
- r = sd_rtnl_message_new_link(netdev->manager->rtnl, &req, RTM_NEWLINK, 0);
- if (r < 0) {
- log_error_netdev(netdev,
- "Could not allocate RTM_NEWLINK message: %s",
- strerror(-r));
- return r;
- }
-
- if (link) {
- r = sd_rtnl_message_append_u32(req, IFLA_LINK, link->ifindex);
- if (r < 0) {
- log_error_netdev(netdev,
- "Could not append IFLA_LINK attribute: %s",
- strerror(-r));
- return r;
- }
- }
-
- r = sd_rtnl_message_append_string(req, IFLA_IFNAME, netdev->ifname);
- if (r < 0) {
- log_error_netdev(netdev,
- "Could not append IFLA_IFNAME attribute: %s",
- strerror(-r));
- return r;
- }
+ if (NETDEV_VTABLE(netdev)->fill_message_create_on_link) {
+ _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL;
- if(netdev->mtu) {
- r = sd_rtnl_message_append_u32(req, IFLA_MTU, netdev->mtu);
+ r = sd_rtnl_message_new_link(netdev->manager->rtnl, &req,
+ RTM_NEWLINK, 0);
if (r < 0) {
log_error_netdev(netdev,
- "Could not append IFLA_MTU attribute: %s",
+ "Could not allocate RTM_SETLINK message: %s",
strerror(-r));
return r;
}
- }
- r = sd_rtnl_message_open_container(req, IFLA_LINKINFO);
- if (r < 0) {
- log_error_netdev(netdev,
- "Could not open IFLA_LINKINFO container: %s",
- strerror(-r));
- return r;
- }
-
- kind = netdev_kind_to_string(netdev->kind);
- if (!kind) {
- log_error_netdev(netdev, "Invalid kind");
- return -EINVAL;
- }
+ NETDEV_VTABLE(netdev)->fill_message_create_on_link(netdev, link, req);
- r = sd_rtnl_message_open_container_union(req, IFLA_INFO_DATA, kind);
- if (r < 0) {
- log_error_netdev(netdev,
- "Could not open IFLA_INFO_DATA container: %s",
- strerror(-r));
- return r;
- }
-
- if (netdev->vlanid <= VLANID_MAX) {
- r = sd_rtnl_message_append_u16(req, IFLA_VLAN_ID, netdev->vlanid);
+ r = sd_rtnl_call_async(netdev->manager->rtnl, req, callback, link, 0, NULL);
if (r < 0) {
log_error_netdev(netdev,
- "Could not append IFLA_VLAN_ID attribute: %s",
- strerror(-r));
- return r;
- }
- }
-
- if (netdev->macvlan_mode != _NETDEV_MACVLAN_MODE_INVALID) {
- r = sd_rtnl_message_append_u32(req, IFLA_MACVLAN_MODE, netdev->macvlan_mode);
- if (r < 0) {
- log_error_netdev(netdev,
- "Could not append IFLA_MACVLAN_MODE attribute: %s",
- strerror(-r));
+ "Could not send rtnetlink message: %s", strerror(-r));
return r;
}
- }
- r = sd_rtnl_message_close_container(req);
- if (r < 0) {
- log_error_netdev(netdev,
- "Could not close IFLA_INFO_DATA container %s",
- strerror(-r));
- return r;
- }
-
- r = sd_rtnl_message_close_container(req);
- if (r < 0) {
- log_error_netdev(netdev,
- "Could not close IFLA_LINKINFO container %s",
- strerror(-r));
- return r;
- }
-
- if (link)
- r = sd_rtnl_call_async(netdev->manager->rtnl, req, callback, link, 0, NULL);
- else
- r = sd_rtnl_call_async(netdev->manager->rtnl, req, &netdev_create_handler, 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 netdev");
-
- netdev->state = NETDEV_STATE_CREATING;
-
- return 0;
-}
-
-int netdev_enslave(NetDev *netdev, Link *link, sd_rtnl_message_handler_t callback) {
- int r;
-
- 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)
- return r;
- } else {
- /* the netdev is not yet read, save this request for when it is*/
- netdev_enslave_callback *cb;
-
- cb = new0(netdev_enslave_callback, 1);
- if (!cb)
- return log_oom();
-
- cb->callback = callback;
- cb->link = link;
-
- LIST_PREPEND(callbacks, netdev->callbacks, cb);
- }
+ link_ref(link);
+ } else if (NETDEV_VTABLE(netdev)->enslave) {
+ return NETDEV_VTABLE(netdev)->enslave(netdev, link, callback);
+ } else
+ assert_not_reached("Joining link to netdev of invalid kind");
return 0;
}
int netdev_set_ifindex(NetDev *netdev, sd_rtnl_message *message) {
uint16_t type;
const char *kind;
- char *received_kind;
- char *received_name;
+ const char *received_kind;
+ const char *received_name;
int r, ifindex;
assert(netdev);
return r;
}
-
if (netdev->ifindex > 0) {
if (netdev->ifindex != ifindex) {
log_error_netdev(netdev, "Could not set ifindex to %d, already set to %d",
return r;
}
- kind = netdev_kind_to_string(netdev->kind);
- if (!kind) {
- log_error_netdev(netdev, "Could not get kind");
- netdev_enter_failed(netdev);
- return -EINVAL;
+ if (netdev->kind == NETDEV_KIND_TAP)
+ /* the kernel does not distinguish between tun and tap */
+ kind = "tun";
+ else {
+ kind = netdev_kind_to_string(netdev->kind);
+ if (!kind) {
+ log_error_netdev(netdev, "Could not get kind");
+ netdev_enter_failed(netdev);
+ return -EINVAL;
+ }
}
if (!streq(kind, received_kind)) {
- log_error_netdev(netdev, "Received newlink with wrong KIND %s, "
+ log_error_netdev(netdev,
+ "Received newlink with wrong KIND %s, "
"expected %s", received_kind, kind);
netdev_enter_failed(netdev);
return r;
return 0;
}
+#define HASH_KEY SD_ID128_MAKE(52,e1,45,bd,00,6f,29,96,21,c6,30,6d,83,71,04,48)
+
+int netdev_get_mac(const char *ifname, struct ether_addr **ret) {
+ _cleanup_free_ struct ether_addr *mac = NULL;
+ uint8_t result[8];
+ size_t l, sz;
+ uint8_t *v;
+ int r;
+
+ assert(ifname);
+ assert(ret);
+
+ mac = new0(struct ether_addr, 1);
+ if (!mac)
+ return -ENOMEM;
+
+ l = strlen(ifname);
+ sz = sizeof(sd_id128_t) + l;
+ v = alloca(sz);
+
+ /* fetch some persistent data unique to the machine */
+ r = sd_id128_get_machine((sd_id128_t*) v);
+ if (r < 0)
+ return r;
+
+ /* combine with some data unique (on this machine) to this
+ * netdev */
+ memcpy(v + sizeof(sd_id128_t), ifname, l);
+
+ /* Let's hash the host machine ID plus the container name. We
+ * use a fixed, but originally randomly created hash key here. */
+ siphash24(result, v, sz, HASH_KEY.bytes);
+
+ assert_cc(ETH_ALEN <= sizeof(result));
+ memcpy(mac->ether_addr_octet, result, ETH_ALEN);
+
+ /* see eth_random_addr in the kernel */
+ mac->ether_addr_octet[0] &= 0xfe; /* clear multicast bit */
+ mac->ether_addr_octet[0] |= 0x02; /* set local assignment bit (IEEE802) */
+
+ *ret = mac;
+ mac = NULL;
+
+ return 0;
+}
+
static int netdev_load_one(Manager *manager, const char *filename) {
_cleanup_netdev_unref_ NetDev *netdev = NULL;
_cleanup_fclose_ FILE *file = NULL;
assert(manager);
assert(filename);
- if (null_or_empty_path(filename)) {
- log_debug("skipping empty file: %s", filename);
- return 0;
- }
-
file = fopen(filename, "re");
if (!file) {
if (errno == ENOENT)
return -errno;
}
+ if (null_or_empty_fd(fileno(file))) {
+ log_debug("Skipping empty file: %s", filename);
+ return 0;
+ }
+
netdev = new0(NetDev, 1);
if (!netdev)
return log_oom();
netdev->state = _NETDEV_STATE_INVALID;
netdev->kind = _NETDEV_KIND_INVALID;
netdev->macvlan_mode = _NETDEV_MACVLAN_MODE_INVALID;
+ netdev->bond_mode = _NETDEV_BOND_MODE_INVALID;
netdev->vlanid = VLANID_MAX + 1;
-
- r = config_parse(NULL, filename, file, "Match\0NetDev\0VLAN\0MACVLAN\0Tunnel\0Peer\0",
- config_item_perf_lookup, (void*) network_netdev_gperf_lookup,
- false, false, netdev);
- if (r < 0) {
- log_warning("Could not parse config file %s: %s", filename, strerror(-r));
+ netdev->vxlanid = VXLAN_VID_MAX + 1;
+ netdev->tunnel_pmtudisc = true;
+ netdev->learning = true;
+
+ r = config_parse(NULL, filename, file,
+ "Match\0NetDev\0VLAN\0MACVLAN\0VXLAN\0Tunnel\0Peer\0Tun\0Tap\0Bond\0",
+ config_item_perf_lookup, network_netdev_gperf_lookup,
+ false, false, true, netdev);
+ if (r < 0)
return r;
- }
- if (netdev->kind == _NETDEV_KIND_INVALID) {
- log_warning("NetDev without Kind configured in %s. Ignoring", filename);
+ /* skip out early if configuration does not match the environment */
+ if (net_match_config(NULL, NULL, NULL, NULL, NULL,
+ netdev->match_host, netdev->match_virt,
+ netdev->match_kernel, netdev->match_arch,
+ NULL, NULL, NULL, NULL, NULL, NULL) <= 0)
+ return 0;
+
+ if (!NETDEV_VTABLE(netdev)) {
+ log_warning("NetDev with invalid Kind configured in %s. Ignoring", filename);
return 0;
}
+ /* verify configuration */
+ if (NETDEV_VTABLE(netdev)->config_verify) {
+ r = NETDEV_VTABLE(netdev)->config_verify(netdev, filename);
+ if (r < 0)
+ return 0;
+ }
+
if (!netdev->ifname) {
log_warning("NetDev without Name configured in %s. Ignoring", filename);
return 0;
}
- if (netdev->kind == NETDEV_KIND_VLAN && netdev->vlanid > VLANID_MAX) {
- log_warning("VLAN without valid Id configured in %s. Ignoring", filename);
+ if (netdev->kind != NETDEV_KIND_VLAN && netdev->vlanid <= VLANID_MAX) {
+ log_warning("VLAN Id configured for a %s in %s. Ignoring",
+ netdev_kind_to_string(netdev->kind), filename);
return 0;
}
- if (netdev->kind != NETDEV_KIND_VLAN && netdev->vlanid <= VLANID_MAX) {
- log_warning("VLAN Id configured for a %s in %s. Ignoring",
+ if (netdev->kind != NETDEV_KIND_VXLAN && netdev->vxlanid <= VXLAN_VID_MAX) {
+ log_warning("VXLAN Id configured for a %s in %s. Ignoring",
netdev_kind_to_string(netdev->kind), filename);
return 0;
}
if (!netdev->filename)
return log_oom();
- if (net_match_config(NULL, NULL, NULL, NULL, NULL,
- netdev->match_host, netdev->match_virt,
- netdev->match_kernel, netdev->match_arch,
- NULL, NULL, NULL, NULL, NULL, NULL) <= 0)
- return 0;
+ if (!netdev->mac) {
+ r = netdev_get_mac(netdev->ifname, &netdev->mac);
+ if (r < 0) {
+ log_error("Failed to generate predictable MAC address for %s",
+ netdev->ifname);
+ return r;
+ }
+ }
r = hashmap_put(netdev->manager->netdevs, netdev->ifname, netdev);
if (r < 0)
LIST_HEAD_INIT(netdev->callbacks);
- if(netdev->kind == NETDEV_KIND_VETH)
- return netdev_create_veth(netdev, netdev_create_handler);
+ log_debug_netdev(netdev, "loaded %s", netdev_kind_to_string(netdev->kind));
+
+ /* create netdev */
+ if (NETDEV_VTABLE(netdev)->fill_message_create) {
+ _cleanup_rtnl_message_unref_ sd_rtnl_message *m = NULL;
+
+ 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;
+ }
+
+ r = NETDEV_VTABLE(netdev)->fill_message_create(netdev, m);
+ if (r < 0)
+ return r;
+
+ r = sd_rtnl_call_async(netdev->manager->rtnl, m, netdev_create_handler, netdev, 0, NULL);
+ if (r < 0) {
+ log_error_netdev(netdev,
+ "Could not send rtnetlink message: %s", strerror(-r));
+ return r;
+ }
+
+ netdev_ref(netdev);
- if (netdev->kind != NETDEV_KIND_VLAN &&
- 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);
+ log_debug_netdev(netdev, "creating");
+
+ netdev->state = NETDEV_STATE_CREATING;
+ } else if (NETDEV_VTABLE(netdev)->create) {
+ r = NETDEV_VTABLE(netdev)->create(netdev);
if (r < 0)
return r;
}
- log_debug_netdev(netdev, "loaded %s", netdev_kind_to_string(netdev->kind));
-
netdev = NULL;
return 0;
~ianmdlvl / elogind.git / blobdiff