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authorSven Eckelmann <sven@narfation.org>2020-10-11 12:25:24 +0200
committerSimon Wunderlich <sw@simonwunderlich.de>2020-12-04 08:40:52 +0100
commita5ad457eea41ef7209f3a1765f853a2c7f191131 (patch)
tree0bca594bc72c4b43bc42ce4704005d343c43672b /include/uapi/linux/batman_adv.h
parent128254ceea6ffe59300d3cca6fc83b842048f4c4 (diff)
downloadlwn-a5ad457eea41ef7209f3a1765f853a2c7f191131.tar.gz
lwn-a5ad457eea41ef7209f3a1765f853a2c7f191131.zip
batman-adv: Allow selection of routing algorithm over rtnetlink
A batadv net_device is associated to a B.A.T.M.A.N. routing algorithm. This algorithm has to be selected before the interface is initialized and cannot be changed after that. The only way to select this algorithm was a module parameter which specifies the default algorithm used during the creation of the net_device. This module parameter is writeable over /sys/module/batman_adv/parameters/routing_algo and thus allows switching of the routing algorithm: 1. change routing_algo parameter 2. create new batadv net_device But this is not race free because another process can be scheduled between 1 + 2 and in that time frame change the routing_algo parameter again. It is much cleaner to directly provide this information inside the rtnetlink's RTM_NEWLINK message. The two processes would be (in regards of the creation parameter of their batadv interfaces) be isolated. This also eases the integration of batadv devices inside tools like network-manager or systemd-networkd which are not expecting to operate on /sys before a new net_device is created. Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Diffstat (limited to 'include/uapi/linux/batman_adv.h')
-rw-r--r--include/uapi/linux/batman_adv.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/uapi/linux/batman_adv.h b/include/uapi/linux/batman_adv.h
index b05399d8a127..bdb317faa1dc 100644
--- a/include/uapi/linux/batman_adv.h
+++ b/include/uapi/linux/batman_adv.h
@@ -685,6 +685,12 @@ enum batadv_ifla_attrs {
*/
IFLA_BATADV_UNSPEC,
+ /**
+ * @IFLA_BATADV_ALGO_NAME: routing algorithm (name) which should be
+ * used by the newly registered batadv net_device.
+ */
+ IFLA_BATADV_ALGO_NAME,
+
/* add attributes above here, update the policy in soft-interface.c */
/**