From 9b1e7a34b9fde78a86546d2c714f1f8fb4808592 Mon Sep 17 00:00:00 2001
From: Mark Salyzyn <salyzyn@google.com>
Date: Tue, 25 Sep 2018 10:12:26 -0700
Subject: [PATCH] init: IsDmLinearEnabled() replace with check if logical
 partitions present in fstab

IsDmLinearEnabled() true if logical partitions present in fstab.

Test: boot on logical device
Bug: 109821005
Change-Id: Ic083b0b8d9f7e9511d78bdc05c9f848521f1feb5
---
 init/first_stage_mount.cpp | 24 ++++++++----------------
 1 file changed, 8 insertions(+), 16 deletions(-)

diff --git a/init/first_stage_mount.cpp b/init/first_stage_mount.cpp
index 1f4bec1bd..c25c5265d 100644
--- a/init/first_stage_mount.cpp
+++ b/init/first_stage_mount.cpp
@@ -68,6 +68,7 @@ class FirstStageMount {
     bool CreateLogicalPartitions();
     bool MountPartition(fstab_rec* fstab_rec);
     bool MountPartitions();
+    bool IsDmLinearEnabled();
     bool GetBackingDmLinearDevices();
 
     virtual ListenerAction UeventCallback(const Uevent& uevent);
@@ -130,22 +131,6 @@ static bool IsRecoveryMode() {
     return !force_normal_boot && access("/system/bin/recovery", F_OK) == 0;
 }
 
-static inline bool IsDmLinearEnabled() {
-    static bool checked = false;
-    static bool enabled = false;
-    if (checked) {
-        return enabled;
-    }
-    import_kernel_cmdline(false,
-                          [](const std::string& key, const std::string& value, bool in_qemu) {
-                              if (key == "androidboot.logical_partitions" && value == "1") {
-                                  enabled = true;
-                              }
-                          });
-    checked = true;
-    return enabled;
-}
-
 // Class Definitions
 // -----------------
 FirstStageMount::FirstStageMount()
@@ -194,6 +179,13 @@ bool FirstStageMount::InitDevices() {
     return GetBackingDmLinearDevices() && GetDmVerityDevices() && InitRequiredDevices();
 }
 
+bool FirstStageMount::IsDmLinearEnabled() {
+    for (auto fstab_rec : mount_fstab_recs_) {
+        if (fs_mgr_is_logical(fstab_rec)) return true;
+    }
+    return false;
+}
+
 bool FirstStageMount::GetBackingDmLinearDevices() {
     // Add any additional devices required for dm-linear mappings.
     if (!IsDmLinearEnabled()) {