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Takashi Iwai |
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From 3d9d9a77cdbe2a772763f1a4da68871ffe1550f8 Mon Sep 17 00:00:00 2001
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Takashi Iwai |
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From: Stephen Suryaputra <ssuryaextr@gmail.com>
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Takashi Iwai |
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Date: Wed, 20 Oct 2021 16:06:18 -0400
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Takashi Iwai |
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Subject: [PATCH] gre/sit: Don't generate link-local addr if addr_gen_mode is IN6_ADDR_GEN_MODE_NONE
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Takashi Iwai |
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Git-commit: 61e18ce7348bfefb5688a8bcd4b4d6b37c0f9b2a
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Takashi Iwai |
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Patch-mainline: v5.16-rc1
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Takashi Iwai |
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References: stable-5.14.19
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Takashi Iwai |
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Takashi Iwai |
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[ Upstream commit 61e18ce7348bfefb5688a8bcd4b4d6b37c0f9b2a ]
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Takashi Iwai |
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Takashi Iwai |
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When addr_gen_mode is set to IN6_ADDR_GEN_MODE_NONE, the link-local addr
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Takashi Iwai |
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should not be generated. But it isn't the case for GRE (as well as GRE6)
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Takashi Iwai |
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and SIT tunnels. Make it so that tunnels consider the addr_gen_mode,
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Takashi Iwai |
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especially for IN6_ADDR_GEN_MODE_NONE.
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Takashi Iwai |
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Takashi Iwai |
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Do this in add_v4_addrs() to cover both GRE and SIT only if the addr
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Takashi Iwai |
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scope is link.
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Takashi Iwai |
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Takashi Iwai |
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Signed-off-by: Stephen Suryaputra <ssuryaextr@gmail.com>
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Takashi Iwai |
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Acked-by: Antonio Quartulli <a@unstable.cc>
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Takashi Iwai |
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Link: https://lore.kernel.org/r/20211020200618.467342-1-ssuryaextr@gmail.com
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Takashi Iwai |
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Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Takashi Iwai |
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Signed-off-by: Sasha Levin <sashal@kernel.org>
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Takashi Iwai |
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Acked-by: Takashi Iwai <tiwai@suse.de>
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Takashi Iwai |
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Takashi Iwai |
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---
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Takashi Iwai |
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net/ipv6/addrconf.c | 3 +++
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Takashi Iwai |
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1 file changed, 3 insertions(+)
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Takashi Iwai |
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Takashi Iwai |
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diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
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Takashi Iwai |
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index 3bf685fe64b9..eb745213561c 100644
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Takashi Iwai |
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--- a/net/ipv6/addrconf.c
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Takashi Iwai |
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+++ b/net/ipv6/addrconf.c
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Takashi Iwai |
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@@ -3100,6 +3100,9 @@ static void sit_add_v4_addrs(struct inet6_dev *idev)
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Takashi Iwai |
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memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
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Takashi Iwai |
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Takashi Iwai |
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if (idev->dev->flags&IFF_POINTOPOINT) {
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Takashi Iwai |
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+ if (idev->cnf.addr_gen_mode == IN6_ADDR_GEN_MODE_NONE)
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Takashi Iwai |
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+ return;
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Takashi Iwai |
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+
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Takashi Iwai |
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addr.s6_addr32[0] = htonl(0xfe800000);
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Takashi Iwai |
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scope = IFA_LINK;
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Takashi Iwai |
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plen = 64;
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Takashi Iwai |
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--
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Takashi Iwai |
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2.26.2
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Takashi Iwai |
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