From c93eeecb15c4acac9226a3394c93d7e99a809d6b Mon Sep 17 00:00:00 2001 From: Saul Wold Date: Mon, 31 Mar 2014 10:37:38 -0700 Subject: image.bbclass: add function to disable SSH DNS Lookup for Qemu This function disables the reverse DNS lookup on QEMU targets to reduce the delay when using static IP address. By disabling DNS lookup we can save a great deal of time during automated testing on the autobuilder (on the order of ~400 seconds per ssh tranaction). This is seen when using the testimage, there is a delay getting logged-in from the server to target. It's enabled for all qemu imgaes by default and can be overridden by setting the SSH_DISABLE_DNS_LOOKUP variable. [YOCTO #5954] Signed-off-by: Saul Wold Signed-off-by: Richard Purdie --- meta/classes/image.bbclass | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'meta') diff --git a/meta/classes/image.bbclass b/meta/classes/image.bbclass index 29309f55cb..ea035fe144 100644 --- a/meta/classes/image.bbclass +++ b/meta/classes/image.bbclass @@ -304,6 +304,16 @@ ssh_allow_empty_password () { fi } +# Disable DNS lookups, the SSH_DISABLE_DNS_LOOKUP can be overridden to allow +# distros to choose not to take this change +SSH_DISABLE_DNS_LOOKUP ?= " ssh_disable_dns_lookup ; " +ROOTFS_POSTPROCESS_COMMAND_append_qemuall = "${SSH_DISABLE_DNS_LOOKUP}" +ssh_disable_dns_lookup () { + if [ -e ${IMAGE_ROOTFS}${sysconfdir}/ssh/sshd_config ]; then + sed -i -e 's:#UseDNS yes:UseDNS no:' ${IMAGE_ROOTFS}${sysconfdir}/ssh/sshd_config + fi +} + # Enable postinst logging if debug-tweaks is enabled postinst_enable_logging () { mkdir -p ${IMAGE_ROOTFS}${sysconfdir}/default -- cgit v1.2.3