From: Til Kaiser <mail@tk154.de>
Date: Sun, 29 Sep 2024 14:55:57 +0000 (+0200)
Subject: base-files: add ucidef_set_network_device_path_port function
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=503596b8cea735b74c90f3420cd246c706f74905;p=openwrt%2Fstaging%2Fblocktrron.git

base-files: add ucidef_set_network_device_path_port function

The already existing uci function ucidef_set_network_device_path
can be used to specify a unique PCI address to name a network interface.
However, I noticed that some NIC ports share the same PCI address
but are still distinguishable by the dev_port value of the network
interface's sysfs entry.

This commit adds a new uci function ucidef_set_network_device_path_port,
which is similar to ucidef_set_network_device_path but takes an
additional argument where the user can specify the dev_port value.
The internal function preinit_config_port loops through
all network interfaces at the given PCI address and chooses the one
where the dev_port value matches.

This was tested on an x86_64 device using a Mellanox ConnectX-3 card.

Signed-off-by: Til Kaiser <mail@tk154.de>
Link: https://github.com/openwrt/openwrt/pull/16560
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
---

diff --git a/package/base-files/files/lib/functions/uci-defaults.sh b/package/base-files/files/lib/functions/uci-defaults.sh
index 8355099c35..5293ce12c0 100644
--- a/package/base-files/files/lib/functions/uci-defaults.sh
+++ b/package/base-files/files/lib/functions/uci-defaults.sh
@@ -122,6 +122,11 @@ ucidef_set_network_device_path() {
 	_ucidef_set_network_device_common $1 path $2
 }
 
+ucidef_set_network_device_path_port() {
+	_ucidef_set_network_device_common $1 path $2
+	_ucidef_set_network_device_common $1 port $3
+}
+
 ucidef_set_network_device_gro() {
 	_ucidef_set_network_device_common $1 gro $2
 }
diff --git a/package/base-files/files/lib/preinit/10_indicate_preinit b/package/base-files/files/lib/preinit/10_indicate_preinit
index a8f7758c84..12f8fc2e21 100644
--- a/package/base-files/files/lib/preinit/10_indicate_preinit
+++ b/package/base-files/files/lib/preinit/10_indicate_preinit
@@ -65,12 +65,27 @@ preinit_config_switch() {
 
 preinit_config_port() {
 	local original
+	local dev_port
 
 	local netdev="$1"
 	local path="$2"
+	local port="$3"
 
 	[ -d "/sys/devices/$path/net" ] || return
-	original="$(ls "/sys/devices/$path/net" | head -1)"
+
+	if [ -z "$port" ]; then
+		original="$(ls "/sys/devices/$path/net" | head -1)"
+	else
+		for device in /sys/devices/$path/net/*; do
+			dev_port="$(cat "$device/dev_port")"
+			if [ "$dev_port" = "$port" ]; then
+				original="${device##*/}"
+				break
+			fi
+		done
+
+		[ -z "$original" ] && return
+	fi
 
 	[ "$netdev" = "$original" ] && return
 
@@ -109,7 +124,8 @@ preinit_config_board() {
 		json_select "network_device"
 			json_select "$netdev"
 				json_get_vars path path
-				[ -n "$path" ] && preinit_config_port "$netdev" "$path"
+				json_get_vars port port
+				[ -n "$path" ] && preinit_config_port "$netdev" "$path" "$port"
 			json_select ..
 		json_select ..
 	done