Snap for 10580647 from c7395ef269b9d570aefe2559b3d4ad1e4d74ce76 to udc-d1-releaseandroid-14.0.0_r9android-14.0.0_r8android-14.0.0_r7android-14.0.0_r6android-14.0.0_r5android-14.0.0_r4android-14.0.0_r3android-14.0.0_r12android-14.0.0_r11android-14.0.0_r10android14-d1-s7-releaseandroid14-d1-s6-releaseandroid14-d1-s5-releaseandroid14-d1-s4-releaseandroid14-d1-s3-releaseandroid14-d1-s2-releaseandroid14-d1-s1-releaseandroid14-d1-release

Change-Id: If9c204f8f435ec960525d16eb903f72a8d140fd5

3 files changed, 17 insertions, 4 deletions

diff --git a/power-libperfmgr/libperfmgr/FileNode.cc b/power-libperfmgr/libperfmgr/FileNode.cc
index 88417848..05f0746d 100644
--- a/power-libperfmgr/libperfmgr/FileNode.cc
+++ b/power-libperfmgr/libperfmgr/FileNode.cc
@@ -31,11 +31,12 @@ namespace android {
 namespace perfmgr {
 
 FileNode::FileNode(std::string name, std::string node_path, std::vector<RequestGroup> req_sorted,
-                   std::size_t default_val_index, bool reset_on_init, bool truncate, bool hold_fd)
+                   std::size_t default_val_index, bool reset_on_init, bool truncate, bool hold_fd, bool write_only)
     : Node(std::move(name), std::move(node_path), std::move(req_sorted), default_val_index,
            reset_on_init),
       hold_fd_(hold_fd),
       truncate_(truncate),
+      write_only_(write_only),
       warn_timeout_(android::base::GetBoolProperty("ro.debuggable", false) ? 5ms : 50ms) {}
 
 std::chrono::milliseconds FileNode::Update(bool log_error) {
@@ -110,7 +111,7 @@ bool FileNode::GetTruncate() const {
 
 void FileNode::DumpToFd(int fd) const {
     std::string node_value;
-    if (!android::base::ReadFileToString(node_path_, &node_value)) {
+    if (!write_only_ && !android::base::ReadFileToString(node_path_, &node_value)) {
         LOG(ERROR) << "Failed to read node path: " << node_path_;
     }
     node_value = android::base::Trim(node_value);
diff --git a/power-libperfmgr/libperfmgr/HintManager.cc b/power-libperfmgr/libperfmgr/HintManager.cc
index 8c84c685..dd313ef5 100644
--- a/power-libperfmgr/libperfmgr/HintManager.cc
+++ b/power-libperfmgr/libperfmgr/HintManager.cc
@@ -495,9 +495,19 @@ std::vector<std::unique_ptr<Node>> HintManager::ParseNodes(
             LOG(VERBOSE) << "Node[" << i << "]'s HoldFd: " << std::boolalpha
                          << hold_fd << std::noboolalpha;
 
+            bool write_only = false;
+            if (nodes[i]["WriteOnly"].empty() || !nodes[i]["WriteOnly"].isBool()) {
+                LOG(INFO) << "Failed to read Node[" << i
+                          << "]'s WriteOnly, set to 'false'";
+            } else {
+                write_only = nodes[i]["WriteOnly"].asBool();
+            }
+            LOG(VERBOSE) << "Node[" << i << "]'s WriteOnly: " << std::boolalpha
+                         << write_only << std::noboolalpha;
+
             nodes_parsed.emplace_back(std::make_unique<FileNode>(
                     name, path, values_parsed, static_cast<std::size_t>(default_index), reset,
-                    truncate, hold_fd));
+                    truncate, hold_fd, write_only));
         } else {
             nodes_parsed.emplace_back(std::make_unique<PropertyNode>(
                 name, path, values_parsed,
diff --git a/power-libperfmgr/libperfmgr/include/perfmgr/FileNode.h b/power-libperfmgr/libperfmgr/include/perfmgr/FileNode.h
index 5e97d276..bb8a2a79 100644
--- a/power-libperfmgr/libperfmgr/include/perfmgr/FileNode.h
+++ b/power-libperfmgr/libperfmgr/include/perfmgr/FileNode.h
@@ -33,7 +33,7 @@ class FileNode : public Node {
   public:
     FileNode(std::string name, std::string node_path, std::vector<RequestGroup> req_sorted,
              std::size_t default_val_index, bool reset_on_init, bool truncate,
-             bool hold_fd = false);
+             bool hold_fd = false, bool write_only = false);
 
     std::chrono::milliseconds Update(bool log_error) override;
 
@@ -48,6 +48,8 @@ class FileNode : public Node {
 
     const bool hold_fd_;
     const bool truncate_;
+    // node will be read in DumpToFd
+    const bool write_only_;
     const std::chrono::milliseconds warn_timeout_;
     android::base::unique_fd fd_;
 };