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Fri, 10 Jul 2026 15:19:21 -0700 (PDT) From: Andre Carvalho Date: Fri, 10 Jul 2026 23:19:17 +0100 Subject: [PATCH net] selftests: netconsole: only restore MAC when it changed on resume Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260710-netcons-mac-reload-v1-1-3fb1bcc70b4a@gmail.com> X-B4-Tracking: v=1; b=H4sIAAAAAAAC/yWMywrCMBBFf6XM2oGkYHz8iriI6R0d0UQyVYTSf ze1y3O550xkqAqjYzdRxUdNS27gNx2lW8xXsA6NqXd9cDvvOGNMJRs/Y+KKR4kDS5At9kEO8EJ NfFWIfv/RE7U/ndfR3pc70rjkaJ5/dEvm9HsAAAA= X-Change-ID: 20260710-netcons-mac-reload-f6f5e86f9e1f To: Breno Leitao , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Shuah Khan Cc: netdev@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, matttbe@kernel.org, Andre Carvalho X-Mailer: b4 0.15.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1783721960; l=1886; i=asantostc@gmail.com; s=20250807; h=from:subject:message-id; bh=rMwXG/xzrygpew45ffALhZX5cO4JIo9QIeLG3lp+VJo=; b=SgBukk6tUV0LYwGEDip6kQYCMUZWS2uKsj3fj/4xPkk94B+G/72XHpkXzD4Vt7aVi2bxYhd4g n2GvezkO1utAhZo8Qpi+kgr5UbwLpMsMH/KBq/lvQVPqEqPc8fm185T X-Developer-Key: i=asantostc@gmail.com; a=ed25519; pk=eWre+RwFHCxkiaQrZLsjC67mZ/pZnzSM/f7/+yFXY4Q= The "mac" bind mode reactivation downs the interface, restores the saved MAC and renames it to trigger a target resume. This assumes the recreated interface comes back with a different MAC, which is true under MACAddressPolicy=none (as on the Netdev CI) but not when MACs are persistent. In the persistent case netconsole resumes the target on its own, and the down/restore/rename flow instead drops it and fails the test. Guard the block on the MAC having actually changed so the test passes under both policies. Fixes: 6ecc08329bab ("selftests: netconsole: validate target resume") Reported-by: Matthieu Baerts (NGI0) Closes: https://lore.kernel.org/netdev/f398373e-2cb4-4649-a491-9763df94d98b@kernel.org/ Signed-off-by: Andre Carvalho --- tools/testing/selftests/drivers/net/netconsole/netcons_resume.sh | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/drivers/net/netconsole/netcons_resume.sh b/tools/testing/selftests/drivers/net/netconsole/netcons_resume.sh index cb59cf436dd0..d9111f2102bc 100755 --- a/tools/testing/selftests/drivers/net/netconsole/netcons_resume.sh +++ b/tools/testing/selftests/drivers/net/netconsole/netcons_resume.sh @@ -44,7 +44,8 @@ function trigger_reactivation() { # Restore MACs ip netns exec "${NAMESPACE}" ip link set "${DSTIF}" \ address "${SAVED_DSTMAC}" - if [ "${BINDMODE}" == "mac" ]; then + if [ "${BINDMODE}" == "mac" ] && + [ "$(mac_get "${SRCIF}")" != "${SAVED_SRCMAC}" ]; then ip link set dev "${SRCIF}" down ip link set dev "${SRCIF}" address "${SAVED_SRCMAC}" # Rename device in order to trigger target resume, as initial --- base-commit: 1cd23ca80784223fa2204e16203f754da4e821f8 change-id: 20260710-netcons-mac-reload-f6f5e86f9e1f Best regards, -- Andre Carvalho