netdev - [PATCH] man/man7/rtnetlink.7: document ifi

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Message-ID: <20251218185452.88205-1-hi@alyssa.is>
Date: Thu, 18 Dec 2025 19:54:52 +0100
From: Alyssa Ross <hi@...ssa.is>
To: Alejandro Colomar <alx@...nel.org>
Cc: linux-man@...r.kernel.org,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Simon Horman <horms@...nel.org>,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] man/man7/rtnetlink.7: document ifi_change

This hasn't been "reserved for future use" since Linux 2.6.22 (commit
83b496e928db ("[RTNETLINK]: Allow changing of subsets of netdevice
flags in rtnl_setlink")), and it's used by iproute2.

Signed-off-by: Alyssa Ross <hi@...ssa.is>
---
 man/man7/rtnetlink.7 | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/man/man7/rtnetlink.7 b/man/man7/rtnetlink.7
index 56cb79bca..6e873dc71 100644
--- a/man/man7/rtnetlink.7
+++ b/man/man7/rtnetlink.7
@@ -83,7 +83,9 @@ is the unique interface index
 message, thus creating a link with the given
 .IR ifindex );
 .I ifi_change
-is reserved for future use and should be always set to 0xFFFFFFFF.
+is a mask specifying which bits of
+.I ifi_flags
+should be applied to the device.
 .TS
 tab(:);
 c s s

base-commit: 46950a0845de91c422efe6c639091ace42cb92f8
-- 
2.51.0