357 lines
13 KiB
C
357 lines
13 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#include <net/if.h>
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#include "alloc-util.h"
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#include "conf-parser.h"
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#include "extract-word.h"
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#include "geneve.h"
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#include "netlink-util.h"
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#include "networkd-manager.h"
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#include "parse-util.h"
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#include "string-table.h"
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#include "string-util.h"
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#include "strv.h"
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#define GENEVE_FLOW_LABEL_MAX_MASK 0xFFFFFU
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#define DEFAULT_GENEVE_DESTINATION_PORT 6081
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static const char* const geneve_df_table[_NETDEV_GENEVE_DF_MAX] = {
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[NETDEV_GENEVE_DF_NO] = "no",
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[NETDEV_GENEVE_DF_YES] = "yes",
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[NETDEV_GENEVE_DF_INHERIT] = "inherit",
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};
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DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(geneve_df, GeneveDF, NETDEV_GENEVE_DF_YES);
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DEFINE_CONFIG_PARSE_ENUM(config_parse_geneve_df, geneve_df, GeneveDF, "Failed to parse Geneve IPDoNotFragment= setting");
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/* callback for geneve netdev's created without a backing Link */
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static int geneve_netdev_create_handler(sd_netlink *rtnl, sd_netlink_message *m, NetDev *netdev) {
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int r;
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assert(netdev);
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assert(netdev->state != _NETDEV_STATE_INVALID);
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r = sd_netlink_message_get_errno(m);
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if (r == -EEXIST)
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log_netdev_info(netdev, "Geneve netdev exists, using existing without changing its parameters");
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else if (r < 0) {
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log_netdev_warning_errno(netdev, r, "Geneve netdev could not be created: %m");
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netdev_drop(netdev);
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return 1;
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}
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log_netdev_debug(netdev, "Geneve created");
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return 1;
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}
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static int netdev_geneve_create(NetDev *netdev) {
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_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
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Geneve *v;
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int r;
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assert(netdev);
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v = GENEVE(netdev);
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r = sd_rtnl_message_new_link(netdev->manager->rtnl, &m, RTM_NEWLINK, 0);
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if (r < 0)
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return log_netdev_error_errno(netdev, r, "Could not allocate RTM_NEWLINK message: %m");
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r = sd_netlink_message_append_string(m, IFLA_IFNAME, netdev->ifname);
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if (r < 0)
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return log_netdev_error_errno(netdev, r, "Could not append IFLA_IFNAME, attribute: %m");
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if (netdev->mac) {
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r = sd_netlink_message_append_ether_addr(m, IFLA_ADDRESS, netdev->mac);
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if (r < 0)
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return log_netdev_error_errno(netdev, r, "Could not append IFLA_ADDRESS attribute: %m");
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}
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if (netdev->mtu != 0) {
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r = sd_netlink_message_append_u32(m, IFLA_MTU, netdev->mtu);
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if (r < 0)
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return log_netdev_error_errno(netdev, r, "Could not append IFLA_MTU attribute: %m");
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}
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r = sd_netlink_message_open_container(m, IFLA_LINKINFO);
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if (r < 0)
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return log_netdev_error_errno(netdev, r, "Could not append IFLA_LINKINFO attribute: %m");
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r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, netdev_kind_to_string(netdev->kind));
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if (r < 0)
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return log_netdev_error_errno(netdev, r, "Could not append IFLA_INFO_DATA attribute: %m");
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if (v->id <= GENEVE_VID_MAX) {
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r = sd_netlink_message_append_u32(m, IFLA_GENEVE_ID, v->id);
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if (r < 0)
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return log_netdev_error_errno(netdev, r, "Could not append IFLA_GENEVE_ID attribute: %m");
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}
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if (in_addr_is_null(v->remote_family, &v->remote) == 0) {
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if (v->remote_family == AF_INET)
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r = sd_netlink_message_append_in_addr(m, IFLA_GENEVE_REMOTE, &v->remote.in);
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else
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r = sd_netlink_message_append_in6_addr(m, IFLA_GENEVE_REMOTE6, &v->remote.in6);
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if (r < 0)
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return log_netdev_error_errno(netdev, r, "Could not append IFLA_GENEVE_REMOTE/IFLA_GENEVE_REMOTE6 attribute: %m");
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}
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if (v->inherit) {
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r = sd_netlink_message_append_u8(m, IFLA_GENEVE_TTL_INHERIT, 1);
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if (r < 0)
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return log_netdev_error_errno(netdev, r, "Could not append IFLA_GENEVE_TTL_INHERIT attribute: %m");
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} else {
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r = sd_netlink_message_append_u8(m, IFLA_GENEVE_TTL, v->ttl);
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if (r < 0)
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return log_netdev_error_errno(netdev, r, "Could not append IFLA_GENEVE_TTL attribute: %m");
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}
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r = sd_netlink_message_append_u8(m, IFLA_GENEVE_TOS, v->tos);
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if (r < 0)
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return log_netdev_error_errno(netdev, r, "Could not append IFLA_GENEVE_TOS attribute: %m");
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r = sd_netlink_message_append_u8(m, IFLA_GENEVE_UDP_CSUM, v->udpcsum);
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if (r < 0)
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return log_netdev_error_errno(netdev, r, "Could not append IFLA_GENEVE_UDP_CSUM attribute: %m");
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r = sd_netlink_message_append_u8(m, IFLA_GENEVE_UDP_ZERO_CSUM6_TX, v->udp6zerocsumtx);
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if (r < 0)
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return log_netdev_error_errno(netdev, r, "Could not append IFLA_GENEVE_UDP_ZERO_CSUM6_TX attribute: %m");
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r = sd_netlink_message_append_u8(m, IFLA_GENEVE_UDP_ZERO_CSUM6_RX, v->udp6zerocsumrx);
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if (r < 0)
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return log_netdev_error_errno(netdev, r, "Could not append IFLA_GENEVE_UDP_ZERO_CSUM6_RX attribute: %m");
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if (v->dest_port != DEFAULT_GENEVE_DESTINATION_PORT) {
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r = sd_netlink_message_append_u16(m, IFLA_GENEVE_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_GENEVE_PORT attribute: %m");
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}
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if (v->flow_label > 0) {
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r = sd_netlink_message_append_u32(m, IFLA_GENEVE_LABEL, htobe32(v->flow_label));
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if (r < 0)
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return log_netdev_error_errno(netdev, r, "Could not append IFLA_GENEVE_LABEL attribute: %m");
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}
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if (v->geneve_df != _NETDEV_GENEVE_DF_INVALID) {
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r = sd_netlink_message_append_u8(m, IFLA_GENEVE_DF, v->geneve_df);
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if (r < 0)
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return log_netdev_error_errno(netdev, r, "Could not append IFLA_GENEVE_DF attribute: %m");
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}
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r = sd_netlink_message_close_container(m);
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if (r < 0)
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return log_netdev_error_errno(netdev, r, "Could not append IFLA_INFO_DATA attribute: %m");
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r = sd_netlink_message_close_container(m);
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if (r < 0)
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return log_netdev_error_errno(netdev, r, "Could not append IFLA_LINKINFO attribute: %m");
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r = netlink_call_async(netdev->manager->rtnl, NULL, m, geneve_netdev_create_handler,
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netdev_destroy_callback, netdev);
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if (r < 0)
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return log_netdev_error_errno(netdev, r, "Could not send rtnetlink message: %m");
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netdev_ref(netdev);
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netdev->state = NETDEV_STATE_CREATING;
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log_netdev_debug(netdev, "Creating");
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return r;
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}
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int config_parse_geneve_vni(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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Geneve *v = userdata;
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uint32_t f;
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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_atou32(rvalue, &f);
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if (r < 0) {
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log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse Geneve VNI '%s'.", rvalue);
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return 0;
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}
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if (f > GENEVE_VID_MAX){
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log_syntax(unit, LOG_WARNING, filename, line, 0, "Geneve VNI out is of range '%s'.", rvalue);
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return 0;
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}
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v->id = f;
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return 0;
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}
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int config_parse_geneve_address(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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Geneve *v = userdata;
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union in_addr_union *addr = data, buffer;
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int r, f;
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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 = in_addr_from_string_auto(rvalue, &f, &buffer);
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if (r < 0) {
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log_syntax(unit, LOG_WARNING, filename, line, r, "geneve '%s' address is invalid, ignoring assignment: %s", lvalue, rvalue);
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return 0;
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}
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r = in_addr_is_multicast(f, &buffer);
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if (r > 0) {
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log_syntax(unit, LOG_WARNING, filename, line, 0, "geneve invalid multicast '%s' address, ignoring assignment: %s", lvalue, rvalue);
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return 0;
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}
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v->remote_family = f;
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*addr = buffer;
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return 0;
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}
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int config_parse_geneve_flow_label(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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Geneve *v = userdata;
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uint32_t f;
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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_atou32(rvalue, &f);
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if (r < 0) {
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log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse Geneve flow label '%s'.", rvalue);
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return 0;
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}
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if (f & ~GENEVE_FLOW_LABEL_MAX_MASK) {
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log_syntax(unit, LOG_WARNING, filename, line, 0,
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"Geneve flow label '%s' not valid. Flow label range should be [0-1048575].", rvalue);
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return 0;
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}
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v->flow_label = f;
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return 0;
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}
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int config_parse_geneve_ttl(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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Geneve *v = userdata;
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unsigned f;
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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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if (streq(rvalue, "inherit"))
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v->inherit = true;
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else {
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r = safe_atou(rvalue, &f);
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if (r < 0) {
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log_syntax(unit, LOG_WARNING, filename, line, r,
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"Failed to parse Geneve TTL '%s', ignoring assignment: %m", rvalue);
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return 0;
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}
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if (f > 255) {
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log_syntax(unit, LOG_WARNING, filename, line, 0,
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"Invalid Geneve TTL '%s'. TTL must be <= 255. Ignoring assignment.", rvalue);
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return 0;
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}
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v->ttl = f;
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}
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return 0;
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}
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static int netdev_geneve_verify(NetDev *netdev, const char *filename) {
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Geneve *v = GENEVE(netdev);
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assert(netdev);
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assert(v);
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assert(filename);
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if (v->id > GENEVE_VID_MAX)
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return log_netdev_warning_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
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"%s: Geneve without valid VNI (or Virtual Network Identifier) configured. Ignoring.",
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filename);
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return 0;
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}
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static void geneve_init(NetDev *netdev) {
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Geneve *v;
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assert(netdev);
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v = GENEVE(netdev);
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assert(v);
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v->id = GENEVE_VID_MAX + 1;
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v->geneve_df = _NETDEV_GENEVE_DF_INVALID;
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v->dest_port = DEFAULT_GENEVE_DESTINATION_PORT;
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v->udpcsum = false;
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v->udp6zerocsumtx = false;
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v->udp6zerocsumrx = false;
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}
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const NetDevVTable geneve_vtable = {
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.object_size = sizeof(Geneve),
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.init = geneve_init,
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.sections = NETDEV_COMMON_SECTIONS "GENEVE\0",
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.create = netdev_geneve_create,
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.create_type = NETDEV_CREATE_INDEPENDENT,
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.config_verify = netdev_geneve_verify,
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.generate_mac = true,
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};
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