commit 3e2eee5868ae2aa9b74b189df18b39040b057ac5
author Tingting Chen <chentingting.2150@bytedance.com> Wed Sep 21 23:22:04 2022 +0800
committer Tingting Chen <chentingting.2150@bytedance.com> Tue Nov 01 17:06:07 2022 +0800
tree 8161aaf66a397562cfa0bc720a730dbadf88fdcc
parent 67aa1fd0a041be38f35229bed9b5123420b640e1

meta-phosphor: modify nbd proxy port settings

Modify the state_hook to dynamically select a unused port.
fixes openbmc/openbmc#3814

Tested:
    1.Login BMC WEB;
    2.Go to 'KVM page', the KVM is working OK;
    3.Click on 'Open in new tab' to make sure another KVM session is opened;
    4.Go to "Virtual media" page, click "Add file", choose an ISO file, and click "Start",verify no error output.

Change-Id: Iba6c682493fe481d0b955d43d0be520cedb5f86f
Signed-off-by: Tingting Chen <chentingting.2150@bytedance.com>

meta-phosphor/recipes-connectivity/jsnbd/jsnbd/state_hook

diff --git a/meta-phosphor/recipes-connectivity/jsnbd/jsnbd/state_hook b/meta-phosphor/recipes-connectivity/jsnbd/jsnbd/state_hook
index 3f5a974..063699e 100755
--- a/meta-phosphor/recipes-connectivity/jsnbd/jsnbd/state_hook
+++ b/meta-phosphor/recipes-connectivity/jsnbd/jsnbd/state_hook
@@ -27,6 +27,21 @@
 
 set -ex
 
+GADGET_BASE=/sys/kernel/config/usb_gadget
+
+which_dev()
+{
+       in_use="$(cat $GADGET_BASE/*/UDC)"
+       cd /sys/class/udc
+       for dev in *; do
+               case "$in_use" in
+                       *"$dev"*) ;;
+                       *) echo "$dev"; return 0;;
+               esac
+       done
+       return 1
+}
+
 case "$action" in
 start)
     mkdir -p $gadget_dir
@@ -48,7 +63,8 @@
     echo 1 > functions/mass_storage.usb0/lun.0/ro
     echo 0 > functions/mass_storage.usb0/lun.0/cdrom
     echo $nbd_device > functions/mass_storage.usb0/lun.0/file
-    echo "1e6a0000.usb-vhub:p4" > UDC
+    device=$(which_dev)
+    echo "$device" > UDC
     )
     ;;
 stop)