man: document the ip macsec offload command

Add a description of the `ip macsec offload` command used to select the
offloading mode on a macsec interface when the underlying device
supports it.

Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.com>
Signed-off-by: David Ahern <dsahern@gmail.com>

diff --git a/man/man8/ip-macsec.8 b/man/man8/ip-macsec.8
index 2179b33683d5b1add0c2929918d4e9b56c36621b..d5f9d240bf1241c730b2e0d6e15fbcb4051131f6 100644 (file)
--- a/man/man8/ip-macsec.8
+++ b/man/man8/ip-macsec.8
@@ -53,6 +53,9 @@ ip-macsec \- MACsec device configuration
 .BI "ip macsec del " DEV " rx " SCI " sa"
 .RI "{ " 0..3 " }"
 
+.BI "ip macsec offload " DEV
+.RB "{ " off " | " phy " }"
+
 .B ip macsec show
 .RI [ " DEV " ]
 
@@ -102,6 +105,10 @@ type.
 .SS Display MACsec configuration
 .nf
 # ip macsec show
+.PP
+.SS Configure offloading on an interface
+.nf
+# ip macsec offload macsec0 phy
 
 .SH NOTES
 This tool can be used to configure the 802.1AE keys of the interface. Note that 802.1AE uses GCM-AES