network: dhcp4: fix another race with SendDecline=yes
If the SD_IPV4ACD_EVENT_BIND event happens before all routes are assigned, then the link stuck in configuring state.
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75be72d139
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153cf04139
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@ -52,12 +52,16 @@ static void dhcp4_release_old_lease(Link *link) {
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}
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}
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static void dhcp4_check_ready(Link *link) {
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static void dhcp4_check_ready(Link *link) {
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if (link->dhcp4_messages == 0) {
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if (link->network->dhcp_send_decline && !link->dhcp4_address_bind)
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link->dhcp4_configured = true;
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return;
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/* New address and routes are configured now. Let's release old lease. */
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dhcp4_release_old_lease(link);
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if (link->dhcp4_messages > 0)
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link_check_ready(link);
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return;
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}
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link->dhcp4_configured = true;
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/* New address and routes are configured now. Let's release old lease. */
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dhcp4_release_old_lease(link);
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link_check_ready(link);
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}
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}
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static int dhcp4_route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
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static int dhcp4_route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
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@ -86,20 +90,18 @@ static int dhcp4_route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *li
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return 1;
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return 1;
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}
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}
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if (link->dhcp4_messages == 0) {
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if (link->dhcp4_messages == 0 && link->dhcp4_route_failed) {
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if (link->dhcp4_route_failed) {
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link->dhcp4_route_failed = false;
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link->dhcp4_route_failed = false;
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link->dhcp4_route_retrying = true;
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link->dhcp4_route_retrying = true;
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r = dhcp4_remove_all(link);
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r = dhcp4_remove_all(link);
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if (r < 0)
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if (r < 0)
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link_enter_failed(link);
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link_enter_failed(link);
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return 1;
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return 1;
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}
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if (!link->network->dhcp_send_decline)
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dhcp4_check_ready(link);
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}
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}
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dhcp4_check_ready(link);
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return 1;
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return 1;
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}
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}
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@ -836,6 +838,7 @@ static void dhcp_address_on_acd(sd_ipv4acd *acd, int event, void *userdata) {
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(void) in_addr_to_string(AF_INET, &address, &pretty);
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(void) in_addr_to_string(AF_INET, &address, &pretty);
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log_link_debug(link, "Successfully claimed DHCP4 address %s", strna(pretty));
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log_link_debug(link, "Successfully claimed DHCP4 address %s", strna(pretty));
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}
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}
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link->dhcp4_address_bind = true;
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dhcp4_check_ready(link);
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dhcp4_check_ready(link);
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break;
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break;
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@ -886,6 +889,44 @@ static int configure_dhcpv4_duplicate_address_detection(Link *link) {
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return 0;
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return 0;
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}
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}
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static int dhcp4_start_acd(Link *link) {
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union in_addr_union addr;
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int r;
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if (!link->network->dhcp_send_decline)
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return 0;
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if (!link->dhcp_lease)
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return 0;
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link->dhcp4_address_bind = false;
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r = sd_dhcp_lease_get_address(link->dhcp_lease, &addr.in);
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if (r < 0)
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return r;
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r = sd_ipv4acd_set_address(link->network->dhcp_acd, &addr.in);
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if (r < 0)
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return r;
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r = sd_ipv4acd_set_callback(link->network->dhcp_acd, dhcp_address_on_acd, link);
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if (r < 0)
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return r;
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if (DEBUG_LOGGING) {
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_cleanup_free_ char *pretty = NULL;
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(void) in_addr_to_string(AF_INET, &addr, &pretty);
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log_link_debug(link, "Starting IPv4ACD client. Probing DHCPv4 address %s", strna(pretty));
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}
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r = sd_ipv4acd_start(link->network->dhcp_acd, true);
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if (r < 0)
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return r;
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return 1;
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}
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static int dhcp4_address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
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static int dhcp4_address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
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int r;
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int r;
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@ -915,31 +956,14 @@ static int dhcp4_address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *
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return 1;
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return 1;
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}
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}
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if (link->network->dhcp_send_decline) {
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r = dhcp4_start_acd(link);
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union in_addr_union addr;
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if (r < 0) {
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log_link_error_errno(link, r, "Failed to start IPv4ACD for DHCP4 adddress: %m");
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link_enter_failed(link);
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return 1;
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}
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(void) sd_dhcp_lease_get_address(link->dhcp_lease, &addr.in);
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dhcp4_check_ready(link);
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r = sd_ipv4acd_set_address(link->network->dhcp_acd, &addr.in);
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if (r < 0)
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return r;
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r = sd_ipv4acd_set_callback(link->network->dhcp_acd, dhcp_address_on_acd, link);
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if (r < 0)
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return r;
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if (DEBUG_LOGGING) {
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_cleanup_free_ char *pretty = NULL;
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(void) in_addr_to_string(AF_INET, &addr, &pretty);
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log_link_debug(link, "Starting IPv4ACD client. Probing DHCPv4 address %s", strna(pretty));
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}
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r = sd_ipv4acd_start(link->network->dhcp_acd, true);
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if (r < 0)
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log_link_warning_errno(link, r, "Failed to start IPv4ACD client, ignoring: %m");
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} else
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dhcp4_check_ready(link);
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return 1;
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return 1;
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}
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}
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@ -108,6 +108,7 @@ typedef struct Link {
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bool dhcp4_route_failed:1;
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bool dhcp4_route_failed:1;
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bool dhcp4_route_retrying:1;
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bool dhcp4_route_retrying:1;
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bool dhcp4_configured:1;
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bool dhcp4_configured:1;
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bool dhcp4_address_bind:1;
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bool dhcp6_address_configured:1;
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bool dhcp6_address_configured:1;
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bool dhcp6_route_configured:1;
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bool dhcp6_route_configured:1;
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bool dhcp6_pd_address_configured:1;
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bool dhcp6_pd_address_configured:1;
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