network: bridgeFDB: rename FdbEntry -> BridgeFDB

1 files changed, 402 insertions, 0 deletions

diff --git a/src/network/networkd-bridge-fdb.c b/src/network/networkd-bridge-fdb.c
new file mode 100644
index 0000000000..3c754aa126
--- /dev/null
+++ b/src/network/networkd-bridge-fdb.c
@@ -0,0 +1,402 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/***
+  Copyright © 2014 Intel Corporation. All rights reserved.
+***/
+
+#include <net/ethernet.h>
+#include <net/if.h>
+
+#include "alloc-util.h"
+#include "bridge.h"
+#include "netlink-util.h"
+#include "networkd-bridge-fdb.h"
+#include "networkd-link.h"
+#include "networkd-manager.h"
+#include "networkd-network.h"
+#include "parse-util.h"
+#include "string-table.h"
+#include "vlan-util.h"
+#include "vxlan.h"
+
+#define STATIC_BRIDGE_FDB_ENTRIES_PER_NETWORK_MAX 1024U
+
+/* remove and FDB entry. */
+BridgeFDB *bridge_fdb_free(BridgeFDB *fdb) {
+        if (!fdb)
+                return NULL;
+
+        if (fdb->network) {
+                assert(fdb->section);
+                hashmap_remove(fdb->network->bridge_fdb_entries_by_section, fdb->section);
+        }
+
+        network_config_section_free(fdb->section);
+        return mfree(fdb);
+}
+
+DEFINE_NETWORK_SECTION_FUNCTIONS(BridgeFDB, bridge_fdb_free);
+
+/* create a new FDB entry or get an existing one. */
+static int bridge_fdb_new_static(
+                Network *network,
+                const char *filename,
+                unsigned section_line,
+                BridgeFDB **ret) {
+
+        _cleanup_(network_config_section_freep) NetworkConfigSection *n = NULL;
+        _cleanup_(bridge_fdb_freep) BridgeFDB *fdb = NULL;
+        int r;
+
+        assert(network);
+        assert(ret);
+        assert(filename);
+        assert(section_line > 0);
+
+        r = network_config_section_new(filename, section_line, &n);
+        if (r < 0)
+                return r;
+
+        /* search entry in hashmap first. */
+        fdb = hashmap_get(network->bridge_fdb_entries_by_section, n);
+        if (fdb) {
+                *ret = TAKE_PTR(fdb);
+                return 0;
+        }
+
+        if (hashmap_size(network->bridge_fdb_entries_by_section) >= STATIC_BRIDGE_FDB_ENTRIES_PER_NETWORK_MAX)
+                return -E2BIG;
+
+        /* allocate space for and FDB entry. */
+        fdb = new(BridgeFDB, 1);
+        if (!fdb)
+                return -ENOMEM;
+
+        /* init FDB structure. */
+        *fdb = (BridgeFDB) {
+                .network = network,
+                .section = TAKE_PTR(n),
+                .vni = VXLAN_VID_MAX + 1,
+                .ntf_flags = NEIGHBOR_CACHE_ENTRY_FLAGS_SELF,
+        };
+
+        r = hashmap_ensure_put(&network->bridge_fdb_entries_by_section, &network_config_hash_ops, fdb->section, fdb);
+        if (r < 0)
+                return r;
+
+        /* return allocated FDB structure. */
+        *ret = TAKE_PTR(fdb);
+
+        return 0;
+}
+
+static int set_fdb_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
+        int r;
+
+        assert(link);
+
+        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
+                return 1;
+
+        r = sd_netlink_message_get_errno(m);
+        if (r < 0 && r != -EEXIST) {
+                log_link_message_warning_errno(link, m, r, "Could not add FDB entry");
+                link_enter_failed(link);
+                return 1;
+        }
+
+        return 1;
+}
+
+/* send a request to the kernel to add a FDB entry in its static MAC table. */
+static int bridge_fdb_configure(Link *link, BridgeFDB *fdb) {
+        _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
+        int r;
+
+        assert(link);
+        assert(link->network);
+        assert(link->manager);
+        assert(fdb);
+
+        /* create new RTM message */
+        r = sd_rtnl_message_new_neigh(link->manager->rtnl, &req, RTM_NEWNEIGH, link->ifindex, AF_BRIDGE);
+        if (r < 0)
+                return log_link_error_errno(link, r, "Could not create RTM_NEWNEIGH message: %m");
+
+        r = sd_rtnl_message_neigh_set_flags(req, fdb->ntf_flags);
+        if (r < 0)
+                return log_link_error_errno(link, r, "Could not set neighbor flags: %m");
+
+        /* only NUD_PERMANENT state supported. */
+        r = sd_rtnl_message_neigh_set_state(req, NUD_NOARP | NUD_PERMANENT);
+        if (r < 0)
+                return log_link_error_errno(link, r, "Could not set neighbor state: %m");
+
+        r = sd_netlink_message_append_data(req, NDA_LLADDR, &fdb->mac_addr, sizeof(fdb->mac_addr));
+        if (r < 0)
+                return log_link_error_errno(link, r, "Could not append NDA_LLADDR attribute: %m");
+
+        /* VLAN Id is optional. We'll add VLAN Id only if it's specified. */
+        if (fdb->vlan_id > 0) {
+                r = sd_netlink_message_append_u16(req, NDA_VLAN, fdb->vlan_id);
+                if (r < 0)
+                        return log_link_error_errno(link, r, "Could not append NDA_VLAN attribute: %m");
+        }
+
+        if (in_addr_is_set(fdb->family, &fdb->destination_addr)) {
+                r = netlink_message_append_in_addr_union(req, NDA_DST, fdb->family, &fdb->destination_addr);
+                if (r < 0)
+                        return log_link_error_errno(link, r, "Could not append NDA_DST attribute: %m");
+        }
+
+        if (fdb->vni <= VXLAN_VID_MAX) {
+                r = sd_netlink_message_append_u32(req, NDA_VNI, fdb->vni);
+                if (r < 0)
+                        return log_link_error_errno(link, r, "Could not append NDA_VNI attribute: %m");
+        }
+
+        /* send message to the kernel to update its internal static MAC table. */
+        r = netlink_call_async(link->manager->rtnl, NULL, req, set_fdb_handler,
+                               link_netlink_destroy_callback, link);
+        if (r < 0)
+                return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
+
+        link_ref(link);
+
+        return 1;
+}
+
+int link_set_bridge_fdb(Link *link) {
+        BridgeFDB *fdb;
+        int r;
+
+        assert(link);
+        assert(link->network);
+
+        HASHMAP_FOREACH(fdb, link->network->bridge_fdb_entries_by_section) {
+                r = bridge_fdb_configure(link, fdb);
+                if (r < 0)
+                        return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
+        }
+
+        return 0;
+}
+
+void network_drop_invalid_bridge_fdb_entries(Network *network) {
+        BridgeFDB *fdb;
+
+        assert(network);
+
+        HASHMAP_FOREACH(fdb, network->bridge_fdb_entries_by_section)
+                if (section_is_invalid(fdb->section))
+                        bridge_fdb_free(fdb);
+}
+
+/* parse the HW address from config files. */
+int config_parse_fdb_hwaddr(
+                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) {
+
+        _cleanup_(bridge_fdb_free_or_set_invalidp) BridgeFDB *fdb = NULL;
+        Network *network = userdata;
+        int r;
+
+        assert(filename);
+        assert(section);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        r = bridge_fdb_new_static(network, filename, section_line, &fdb);
+        if (r < 0)
+                return log_oom();
+
+        r = ether_addr_from_string(rvalue, &fdb->mac_addr);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r, "Not a valid MAC address, ignoring assignment: %s", rvalue);
+                return 0;
+        }
+
+        TAKE_PTR(fdb);
+        return 0;
+}
+
+/* parse the VLAN Id from config files. */
+int config_parse_fdb_vlan_id(
+                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) {
+
+        _cleanup_(bridge_fdb_free_or_set_invalidp) BridgeFDB *fdb = NULL;
+        Network *network = userdata;
+        int r;
+
+        assert(filename);
+        assert(section);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        r = bridge_fdb_new_static(network, filename, section_line, &fdb);
+        if (r < 0)
+                return log_oom();
+
+        r = config_parse_vlanid(unit, filename, line, section,
+                                section_line, lvalue, ltype,
+                                rvalue, &fdb->vlan_id, userdata);
+        if (r < 0)
+                return r;
+
+        TAKE_PTR(fdb);
+        return 0;
+}
+
+int config_parse_fdb_destination(
+                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) {
+
+        _cleanup_(bridge_fdb_free_or_set_invalidp) BridgeFDB *fdb = NULL;
+        Network *network = userdata;
+        int r;
+
+        assert(filename);
+        assert(section);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        r = bridge_fdb_new_static(network, filename, section_line, &fdb);
+        if (r < 0)
+                return log_oom();
+
+        r = in_addr_from_string_auto(rvalue, &fdb->family, &fdb->destination_addr);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "FDB destination IP address is invalid, ignoring assignment: %s",
+                           rvalue);
+                return 0;
+        }
+
+        TAKE_PTR(fdb);
+        return 0;
+}
+
+int config_parse_fdb_vxlan_vni(
+                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) {
+
+        _cleanup_(bridge_fdb_free_or_set_invalidp) BridgeFDB *fdb = NULL;
+        Network *network = userdata;
+        uint32_t vni;
+        int r;
+
+        assert(filename);
+        assert(section);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        r = bridge_fdb_new_static(network, filename, section_line, &fdb);
+        if (r < 0)
+                return log_oom();
+
+        r = safe_atou32(rvalue, &vni);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse VXLAN Network Identifier (VNI), ignoring assignment: %s",
+                           rvalue);
+                return 0;
+        }
+
+        if (vni > VXLAN_VID_MAX) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "FDB invalid VXLAN Network Identifier (VNI), ignoring assignment: %s",
+                           rvalue);
+                return 0;
+        }
+
+        fdb->vni = vni;
+
+        TAKE_PTR(fdb);
+        return 0;
+}
+
+static const char* const ntf_flags_table[_NEIGHBOR_CACHE_ENTRY_FLAGS_MAX] = {
+        [NEIGHBOR_CACHE_ENTRY_FLAGS_USE] = "use",
+        [NEIGHBOR_CACHE_ENTRY_FLAGS_SELF] = "self",
+        [NEIGHBOR_CACHE_ENTRY_FLAGS_MASTER] = "master",
+        [NEIGHBOR_CACHE_ENTRY_FLAGS_ROUTER] = "router",
+};
+
+DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(ntf_flags, NeighborCacheEntryFlags);
+
+int config_parse_fdb_ntf_flags(
+                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) {
+
+        _cleanup_(bridge_fdb_free_or_set_invalidp) BridgeFDB *fdb = NULL;
+        Network *network = userdata;
+        NeighborCacheEntryFlags f;
+        int r;
+
+        assert(filename);
+        assert(section);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        r = bridge_fdb_new_static(network, filename, section_line, &fdb);
+        if (r < 0)
+                return log_oom();
+
+        f = ntf_flags_from_string(rvalue);
+        if (f < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, f,
+                           "FDB failed to parse AssociatedWith=, ignoring assignment: %s",
+                           rvalue);
+                return 0;
+        }
+
+        fdb->ntf_flags = f;
+
+        TAKE_PTR(fdb);
+        return 0;
+}