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authorSamuel Mendoza-Jonas <sam.mj@au1.ibm.com>2015-03-04 13:40:05 +1100
committerSamuel Mendoza-Jonas <sam.mj@au1.ibm.com>2015-03-26 16:25:17 +1100
commit49d7e0f299f96125620003e4b2388e1327b15d3e (patch)
tree0fb82a23f25c348ceef71da5afde2372beaa1e48 /discover
parent91143069d1a40cefd997522d85cb2d8adf1681f7 (diff)
downloadtalos-petitboot-49d7e0f299f96125620003e4b2388e1327b15d3e.tar.gz
talos-petitboot-49d7e0f299f96125620003e4b2388e1327b15d3e.zip
discover: Recognise renamed network interfaces
Udev may change the name of network interfaces if persistent interface naming is used. It is important to recognise this since udev may re-use the old name for a different interface. If we receive an RTM_NEWLINK message for an existing interface, check if the name has been updated. Signed-off-by: Samuel Mendoza-Jonas <sam.mj@au1.ibm.com>
Diffstat (limited to 'discover')
-rw-r--r--discover/network.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/discover/network.c b/discover/network.c
index 3946694..0dad087 100644
--- a/discover/network.c
+++ b/discover/network.c
@@ -510,6 +510,15 @@ static int network_handle_nlmsg(struct network *network, struct nlmsghdr *nlmsg)
add_interface(network, interface);
}
+ /* A repeated RTM_NEWLINK can represent an interface name change */
+ if (strncmp(interface->name, ifname, IFNAMSIZ)) {
+ pb_debug("ifname update: %s -> %s\n", interface->name, ifname);
+ strncpy(interface->name, ifname, sizeof(interface->name) - 1);
+ talloc_free(interface->dev->device->id);
+ interface->dev->device->id =
+ talloc_strdup(interface->dev->device, ifname);
+ }
+
/* notify the sysinfo code about changes to this interface */
if (strcmp(interface->name, "lo"))
system_info_register_interface(
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