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networkd: update mac address in clients when it changes

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Pass the mac address on to ipv4ll and dhcp clients so they always have
up-to-date information, and may react appropriately to the change.

Also drop setting the mac address from uevent, and only log when the
address actually changes.
This commit is contained in:
Tom Gundersen 2014-03-20 19:20:55 +01:00
parent 58ec2d3e6e
commit c49b33aca6
2 changed files with 37 additions and 22 deletions
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55
src/network/networkd-link.c
View File

@ -32,8 +32,6 @@
int link_new(Manager *manager, struct udev_device *device, Link **ret) {
_cleanup_link_free_ Link *link = NULL;
const char *mac;
struct ether_addr *mac_addr;
const char *ifname;
int r;
@ -58,13 +56,6 @@ int link_new(Manager *manager, struct udev_device *device, Link **ret) {
if (r < 0)
return -ENOMEM;
mac = udev_device_get_sysattr_value(device, "address");
if (mac) {
mac_addr = ether_aton(mac);
if (mac_addr)
memcpy(&link->mac, mac_addr, sizeof(struct ether_addr));
}
ifname = udev_device_get_sysname(device);
link->ifname = strdup(ifname);
@ -972,6 +963,9 @@ static int link_update_flags(Link *link, unsigned flags) {
if (link->flags == flags)
return 0;
log_debug_link(link, "link status updated: %#.8x -> %#.8x",
link->flags, flags);
if ((link->flags & IFF_UP) != (flags & IFF_UP))
log_info_link(link,
"link is %s", flags & IFF_UP ? "up": "down");
@ -1011,9 +1005,6 @@ static int link_update_flags(Link *link, unsigned flags) {
}
}
log_debug_link(link, "link status updated: %#.8x -> %#.8x",
link->flags, flags);
link->flags = flags;
return 0;
@ -1321,6 +1312,7 @@ int link_add(Manager *m, struct udev_device *device, Link **ret) {
int link_update(Link *link, sd_rtnl_message *m) {
unsigned flags;
struct ether_addr mac;
int r;
assert(link);
@ -1338,16 +1330,39 @@ int link_update(Link *link, sd_rtnl_message *m) {
PRIu16, link->original_mtu);
}
r = sd_rtnl_message_read_ether_addr(m, IFLA_ADDRESS, &link->mac);
if (r >= 0) {
r = sd_rtnl_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
if (r >= 0 && memcmp(&link->mac.ether_addr_octet, &mac.ether_addr_octet, ETH_ALEN)) {
memcpy(&link->mac.ether_addr_octet, &mac.ether_addr_octet, ETH_ALEN);
log_debug_link(link, "MAC address: "
"%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
link->mac.ether_addr_octet[0],
link->mac.ether_addr_octet[1],
link->mac.ether_addr_octet[2],
link->mac.ether_addr_octet[3],
link->mac.ether_addr_octet[4],
link->mac.ether_addr_octet[5]);
mac.ether_addr_octet[0],
mac.ether_addr_octet[1],
mac.ether_addr_octet[2],
mac.ether_addr_octet[3],
mac.ether_addr_octet[4],
mac.ether_addr_octet[5]);
if (link->ipv4ll) {
r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
if (r < 0) {
log_warning_link(link, "Could not update MAC "
"address in IPv4LL client: %s",
strerror(-r));
return r;
}
}
if (link->dhcp_client) {
r = sd_dhcp_client_set_mac(link->dhcp_client, &link->mac);
if (r < 0) {
log_warning_link(link, "Could not update MAC "
"address in DHCP client: %s",
strerror(-r));
return r;
}
}
}
r = sd_rtnl_message_link_get_flags(m, &flags);

4
src/network/networkd-manager.c
View File

@ -312,13 +312,13 @@ static int manager_rtnl_process_link(sd_rtnl *rtnl, sd_rtnl_message *message, vo
r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
if (r < 0 || ifindex <= 0) {
log_debug("received RTM_NEWLINK message without valid ifindex");
log_warning("received RTM_NEWLINK message without valid ifindex");
return 0;
}
r = sd_rtnl_message_read_string(message, IFLA_IFNAME, &name);
if (r < 0)
log_debug("received RTM_NEWLINK message without valid IFLA_IFNAME");
log_warning("received RTM_NEWLINK message without valid ifname");
else {
NetDev *netdev;