From 1ac151a813deebcc3c98e67f2ea5f0397fcd5c40 Mon Sep 17 00:00:00 2001
From: Clayton Craft <clayton@craftyguy.net>
Date: Fri, 17 Jan 2025 10:01:56 -0800
Subject: [PATCH] Add retry mechnism for setting BT and wlan MAC addr
This replaces 3bfb183fc506 with a retry mechanism, where the BT and wlan
mac is (re)tried every 1 second for up to 5 seconds (configurable).
If this doesn't play nicely with udev rules when using RUN, then
BT_TIMEOUT and/or WLAN_TIMEOUT can be set in the env.
---
bootmac | 44 ++++++++++++++++++++++++++++++++++++++------
1 file changed, 38 insertions(+), 6 deletions(-)
diff --git a/bootmac b/bootmac
index c21290d..eda09a7 100755
--- a/bootmac
+++ b/bootmac
@@ -16,6 +16,8 @@ WLAN_INTERFACE="wlan0"
BT_INTERFACE="hci0"
# Default MAC prefix
MAC_PREFIX="0200"
+BT_TIMEOUT=${BT_TIMEOUT:-5} # seconds
+WLAN_TIMEOUT=${WLAN_TIMEOUT:-5} # seconds
log() {
echo "$@" | logger -t "bootmac"
@@ -141,9 +143,6 @@ mac_generate() {
}
mac_bluetooth() {
- # Some Bluetooth adapters take time before they can be configured
- sleep 1
-
log "setting Bluetooth MAC to $BT_MAC"
# Check if the Bluetooth interface is up
@@ -162,7 +161,24 @@ mac_bluetooth() {
# The 'yes | btmgmt xxx' workaround is needed for proper working of btmgmt
# as noted in https://gitlab.com/postmarketOS/bootmac/-/issues/3
yes | btmgmt -i "$BT_INTERFACE" power off
- yes | btmgmt -i "$BT_INTERFACE" public-addr "$BT_MAC"
+
+ # Setting the mac addr might fail if the device/driver hasn't finished
+ # initializing, so retry
+ timeout=0
+ while [ $timeout -lt "$BT_TIMEOUT" ]; do
+ if yes | btmgmt -i "$BT_INTERFACE" public-addr "$BT_MAC"; then
+ break
+ fi
+ log "Unable to set Bluetooth MAC, retrying after 1 second..."
+ sleep 1
+ timeout=$((timeout + 1))
+ done
+
+ if [ $timeout -ge "$BT_TIMEOUT" ]; then
+ log "Failed to set Bluetooth MAC address, command timed out after $BT_TIMEOUT seconds"
+ return 1
+ fi
+
if [ -n "$BT_RFKILL_UNBLOCKED" ]; then
log "restoring Bluetooth rfkill state to unblocked"
rfkill unblock bluetooth
@@ -180,8 +196,24 @@ mac_wlan() {
set -e
# Bring WLAN down, set the extracted MAC and bring it up again
- ip link set dev "$WLAN_INTERFACE" down
- ip link set dev "$WLAN_INTERFACE" address "$WLAN_MAC"
+ # Setting the mac addr might fail if the device/driver hasn't finished
+ # initializing, so retry
+ timeout=0
+ while [ $timeout -lt "$WLAN_TIMEOUT" ]; do
+ if ip link set dev "$WLAN_INTERFACE" down \
+ && ip link set dev "$WLAN_INTERFACE" address "$WLAN_MAC" ; then
+ break
+ fi
+ log "Unable to set wlan MAC, retrying after 1 second..."
+ sleep 1
+ timeout=$((timeout + 1))
+ done
+
+ if [ $timeout -ge "$WLAN_TIMEOUT" ]; then
+ log "Failed to set wlan MAC address, command timed out after $WLAN_TIMEOUT seconds"
+ return 1
+ fi
+
if [ -n "$WLAN_RFKILL_UNBLOCKED" ]; then
log "restoring WLAN rfkill state to unblocked"
rfkill unblock wlan
--
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