From fa92e97a27dcd2ac20bf3d47ba95e037f386ef05 Mon Sep 17 00:00:00 2001
From: Saqib Khan <khansa@us.ibm.com>
Date: Wed, 2 Aug 2017 12:48:12 -0500
Subject: PNOR: Create a service file for updating symlinks.

- Replace the functionality of updating the symlinks
  under openpower-pnor-code-mgmt to a service file.
- The new service has a dependency on mboxd.service.
  This allows us to only defer the symlink creation/update
  until the mboxd.service is started, which prevents
  symlink updates while HOST is running.

Change-Id: I8542aa24a9058af9560a32eec5140ff5ddee60d1
Signed-off-by: Saqib Khan <khansa@us.ibm.com>
---
 .../flash/openpower-software-manager.bb            |  1 +
 .../openpower-software-manager/obmc-flash-bios     | 53 ++++++++++++++++++++++
 .../obmc-flash-bios-updatesymlinks.service         |  9 ++++
 3 files changed, 63 insertions(+)
 create mode 100644 meta-openbmc-machines/meta-openpower/common/recipes-phosphor/flash/openpower-software-manager/obmc-flash-bios-updatesymlinks.service

diff --git a/meta-openbmc-machines/meta-openpower/common/recipes-phosphor/flash/openpower-software-manager.bb b/meta-openbmc-machines/meta-openpower/common/recipes-phosphor/flash/openpower-software-manager.bb
index 505250cb9..a463bd686 100644
--- a/meta-openbmc-machines/meta-openpower/common/recipes-phosphor/flash/openpower-software-manager.bb
+++ b/meta-openbmc-machines/meta-openpower/common/recipes-phosphor/flash/openpower-software-manager.bb
@@ -49,4 +49,5 @@ SYSTEMD_SERVICE_${PN} += " \
         obmc-flash-bios-ubipatch.service \
         obmc-flash-bios-squashfsmount@.service \
         obmc-flash-bios-ubiremount.service \
+        obmc-flash-bios-updatesymlinks.service \
         "
diff --git a/meta-openbmc-machines/meta-openpower/common/recipes-phosphor/flash/openpower-software-manager/obmc-flash-bios b/meta-openbmc-machines/meta-openpower/common/recipes-phosphor/flash/openpower-software-manager/obmc-flash-bios
index 07931b6ec..b365b79b6 100644
--- a/meta-openbmc-machines/meta-openpower/common/recipes-phosphor/flash/openpower-software-manager/obmc-flash-bios
+++ b/meta-openbmc-machines/meta-openpower/common/recipes-phosphor/flash/openpower-software-manager/obmc-flash-bios
@@ -180,6 +180,56 @@ remount_ubi() {
   done
 }
 
+update_symlinks() {
+  PNOR_ACTIVE_PATH="/var/lib/phosphor-software-manager/pnor/"
+  PNOR_RO_ACTIVE_PATH="/var/lib/phosphor-software-manager/pnor/ro"
+  PNOR_RO_PREFIX="/media/pnor-ro-"
+  PNOR_RW_ACTIVE_PATH="/var/lib/phosphor-software-manager/pnor/rw"
+  PNOR_RW_PREFIX="/media/pnor-rw-"
+  PNOR_PRSV_ACTIVE_PATH="/var/lib/phosphor-software-manager/pnor/prsv"
+  PNOR_PRSV="/media/pnor-prsv"
+
+  # Get the current PNOR version using the priorities stored in
+  # the persistence storage files.
+  persistencePath="/var/lib/obmc/openpower-pnor-code-mgmt/"
+  data="$(grep -r "priority" ${persistencePath})"
+  if [[ -z "$data" ]]; then
+    return 0;
+  fi
+  IFS=$'\n' array=(${data})
+  for element in ${array[@]};
+  do
+    element="${element#$persistencePath}"
+    version="$( cut -d ':' -f 1 <<< "$element" )";
+    priority="${element: -1}"
+
+    if [[ priority -le lowestPriority  ]]; then
+      lowestPriority=${priority}
+      currentVersion=${version}
+    fi
+  done
+
+  if [ ! -d "${PNOR_ACTIVE_PATH}" ]; then
+        mkdir -p "${PNOR_ACTIVE_PATH}"
+  fi
+
+  # If the RW or RO active links doesn't point to the version with
+  # lowest priority, then remove the symlink and create new ones.
+  if [[ $(readlink -f "${PNOR_RO_ACTIVE_PATH}") != ${PNOR_RO_PREFIX}${currentVersion}  ]]; then
+    rm -f ${PNOR_RO_ACTIVE_PATH}
+    ln -sfv ${PNOR_RO_PREFIX}${currentVersion} ${PNOR_RO_ACTIVE_PATH}
+  fi
+
+  if [[ $(readlink -f "${PNOR_RW_ACTIVE_PATH}") != ${PNOR_RW_PREFIX}${currentVersion}  ]]; then
+    rm -f ${PNOR_RW_ACTIVE_PATH}
+    ln -sfv ${PNOR_RW_PREFIX}${currentVersion} ${PNOR_RW_ACTIVE_PATH}
+  fi
+
+  if [[ ! -h ${PNOR_PRSV_ACTIVE_PATH}  ]]; then
+    ln -sfv ${PNOR_PRSV} ${PNOR_PRSV_ACTIVE_PATH}
+  fi
+}
+
 case "$1" in
   ubiattach)
     attach_ubi
@@ -200,6 +250,9 @@ case "$1" in
   ubiremount)
     remount_ubi
     ;;
+  updatesymlinks)
+    update_symlinks
+    ;;
   *)
     echo "Invalid argument"
     exit 1
diff --git a/meta-openbmc-machines/meta-openpower/common/recipes-phosphor/flash/openpower-software-manager/obmc-flash-bios-updatesymlinks.service b/meta-openbmc-machines/meta-openpower/common/recipes-phosphor/flash/openpower-software-manager/obmc-flash-bios-updatesymlinks.service
new file mode 100644
index 000000000..a7e2b7a9e
--- /dev/null
+++ b/meta-openbmc-machines/meta-openpower/common/recipes-phosphor/flash/openpower-software-manager/obmc-flash-bios-updatesymlinks.service
@@ -0,0 +1,9 @@
+[Unit]
+Description=Updates symlinks for active PNOR version
+
+[Service]
+Type=oneshot
+RemainAfterExit=no
+ExecStart={sbindir}/obmc-flash-bios updatesymlinks
+
+WantedBy=mboxd.service mboxd-reload@.service
-- 
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