From d58192a8d2810271d5c6525dc66ba1e1ec3fd2b7 Mon Sep 17 00:00:00 2001
From: Phil Sutter <psutter@redhat.com>
Date: Wed, 12 Feb 2020 22:39:44 +0100
Subject: [PATCH] doc: nft.8: Mention wildcard interface matching

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1763652
Upstream Status: nftables commit 03d45ad330a25

commit 03d45ad330a25323610648bb05f550e0fb9d65b2
Author: Phil Sutter <phil@nwl.cc>
Date:   Thu Feb 6 12:24:51 2020 +0100

    doc: nft.8: Mention wildcard interface matching

    Special meaning of asterisk in interface names wasn't described
    anywhere.

    Signed-off-by: Phil Sutter <phil@nwl.cc>
---
 doc/primary-expression.txt | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/doc/primary-expression.txt b/doc/primary-expression.txt
index 5473d59..a5cab9d 100644
--- a/doc/primary-expression.txt
+++ b/doc/primary-expression.txt
@@ -36,6 +36,13 @@ add such a rule, it will stop matching if the interface gets renamed and it
 will match again in case interface gets deleted and later a new interface
 with the same name is created.
 
+Like with iptables, wildcard matching on interface name prefixes is available for
+*iifname* and *oifname* matches by appending an asterisk (*) character. Note
+however that unlike iptables, nftables does not accept interface names
+consisting of the wildcard character only - users are supposed to just skip
+those always matching expressions. In order to match on literal asterisk
+character, one may escape it using backslash (\).
+
 .Meta expression types
 [options="header"]
 |==================
-- 
2.31.1