On Mon, Jan 04, 2021 at 03:47:44PM +0800, Yu Chuan wrote:

[Why] The `run-ipconfig` step is the IP configuration step for initramfs; The `[ -z "$net_devices"]` step is check whether the network is normal.

Now the `check normal` step is before 'ip configuration' step, so we encounter the following error:

• export NO_NETWORK=1
• echo export NO_NETWORK=1 due to no net devices
• return

[Debug Msg]

• [ ! -e /usr/share/initramfs-tools/scripts/functions ]
• get_net_devices
• local net_devices
• local i
• [ /sys/class/net/enp0s1/ != /sys/class/net/enp0s1/ ]
• [ /sys/class/net/enp0s1/ != /sys/class/net/enp0s1/ ]
• [ p0s1/ != /sys/class/net/enp0s1/ ]
• basename /sys/class/net/enp0s1/
• net_devices= enp0s1
• [ != /sys/class/net/lo/ ]
• continue
• echo enp0s1
• local net_devices= enp0s1
• [ -z ]
• warn_no_eth0
• [ -f /proc/config.gz ]
• return
• echo ls /sys/class/net
• ls /sys/class/net
• is_virt
• [ -n ]
• [ -n ]
• has_cmd virt-what
• command -v virt-what
• grep -q -w hypervisor /proc/cpuinfo
• return 0
• export NO_NETWORK=1
• echo export NO_NETWORK=1 due to no net devices
• return

Signed-off-by: Yu Chuan 13186087857@163.com

lib/bootstrap.sh | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/bootstrap.sh b/lib/bootstrap.sh index 7d15bb370fa9..770d550724f1 100755 --- a/lib/bootstrap.sh +++ b/lib/bootstrap.sh @@ -160,6 +160,9 @@ setup_network() return }

• $LKP_DEBUG_PREFIX $LKP_SRC/bin/run-ipconfig
• network_ok && return
• local net_devices=$(get_net_devices) if [ -z "$net_devices" ]; then

The patch moved around the $net_devices test. What line of code will set $net_devices (or somehow affect its setting)? That fact will answer the question "why the move (hence this patch) helps"?

Thanks, Fengguang

@@ -181,9 +184,6 @@ setup_network() fi fi

• $LKP_DEBUG_PREFIX $LKP_SRC/bin/run-ipconfig
• network_ok && return
• local err_msg='IP-Config: Auto-configuration of network failed' dmesg | grep -q -F "$err_msg" || { # Include $err_msg in the error message so that it matches

-- 2.23.0