diff mbox series

[15/19] lnet: set eth routes needed for multi rail

Message ID 1638142074-5945-16-git-send-email-jsimmons@infradead.org (mailing list archive)
State New, archived
Headers show
Series lustre: update to OpenSFS tree Nov 28, 2021 | expand

Commit Message

James Simmons Nov. 28, 2021, 11:27 p.m. UTC 
From: Serguei Smirnov <ssmirnov@whamcloud.com>

When ksocklnd is initialized or new ethernet interfaces
are added via lnetctl, set the routing rules using a common
shell script ksocklnd-config. This ensures control over
source interface when sending traffic.

For example, for eth0 with ip 192.168.122.142/24:
   the output of "ip route show table eth0" should be
192.168.122.0/24 dev eth0 proto kernel scope link src 192.168.122.142

This step can be omitted by specifying
   options ksocklnd skip_mr_route_setup=1
in the conf file, or by using switch
   --skip-mr-route-setup
when adding NI with lnetctl. Note that the module parameter
takes priority over the lnetctl switch: if skip-mr-route-setup
is not specified when adding NI with lnetctl, the route still
won't get created if the conf file has skip_mr_route_setup=1.

The route also won't be created if any route already exists
for the given interface, assuming advanced users who manage
routing on their own will want to continue doing so.

WC-bug-id: https://jira.whamcloud.com/browse/LU-14662
Lustre-commit: c9bfe57bd2495671f ("LU-14662 lnet: set eth routes needed for multi rail")
Signed-off-by: Serguei Smirnov <ssmirnov@whamcloud.com>
Reviewed-on: https://review.whamcloud.com/44065
Reviewed-by: Amir Shehata <ashehata@whamcloud.com>
Reviewed-by: Cyril Bordage <cbordage@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
Signed-off-by: James Simmons <jsimmons@infradead.org>
---
 net/lnet/klnds/socklnd/socklnd_modparams.c | 5 +++++
 1 file changed, 5 insertions(+)
diff mbox series

Patch

diff --git a/net/lnet/klnds/socklnd/socklnd_modparams.c b/net/lnet/klnds/socklnd/socklnd_modparams.c
index c00ea49..5eb58ca 100644
--- a/net/lnet/klnds/socklnd/socklnd_modparams.c
+++ b/net/lnet/klnds/socklnd/socklnd_modparams.c
@@ -147,6 +147,11 @@ 
 module_param(conns_per_peer, uint, 0644);
 MODULE_PARM_DESC(conns_per_peer, "number of connections per peer");
 
+/* By default skip_mr_route_setup is 0 (do not skip) */
+static unsigned int skip_mr_route_setup;
+module_param(skip_mr_route_setup, uint, 0444);
+MODULE_PARM_DESC(skip_mr_route_setup, "skip automatic setup of linux routes for MR");
+
 #if SOCKNAL_VERSION_DEBUG
 static int protocol = 3;
 module_param(protocol, int, 0644);