From 7f3f02dadf758a8fa81fcdb6ac9e82d4a13d0434 Mon Sep 17 00:00:00 2001
From: Dmitrii Kuvaiskii <dmitrii.kuvaiskii@intel.com>
Date: Wed, 1 May 2024 23:25:04 -0700
Subject: [PATCH] [common] Refactor Protected Files, part 1

This commit refactors PF code without changing functionality (part 1 in
a series of commits). In particular, this commit removes unused
functions, variables, fields, typedefs and macros.

Signed-off-by: Dmitrii Kuvaiskii <dmitrii.kuvaiskii@intel.com>
---
 common/src/protected_files/protected_files.c      |  8 --------
 common/src/protected_files/protected_files.h      | 15 ---------------
 .../src/protected_files/protected_files_format.h  | 12 +++---------
 3 files changed, 3 insertions(+), 32 deletions(-)

diff --git a/common/src/protected_files/protected_files.c b/common/src/protected_files/protected_files.c
index 40ad501c75..89f820a885 100644
--- a/common/src/protected_files/protected_files.c
+++ b/common/src/protected_files/protected_files.c
@@ -1356,11 +1356,3 @@ pf_status_t pf_flush(pf_context_t* pf) {
 
     return PF_STATUS_SUCCESS;
 }
-
-pf_status_t pf_get_handle(pf_context_t* pf, pf_handle_t* handle) {
-    if (!g_initialized)
-        return PF_STATUS_UNINITIALIZED;
-
-    *handle = pf->file;
-    return PF_STATUS_SUCCESS;
-}
diff --git a/common/src/protected_files/protected_files.h b/common/src/protected_files/protected_files.h
index 4354f3e6fe..ce46bdc9af 100644
--- a/common/src/protected_files/protected_files.h
+++ b/common/src/protected_files/protected_files.h
@@ -26,11 +26,6 @@ typedef uint8_t pf_mac_t[PF_MAC_SIZE];
 typedef uint8_t pf_key_t[PF_KEY_SIZE];
 typedef uint8_t pf_keyid_t[32]; /* key derivation material */
 
-extern pf_key_t g_pf_mrenclave_key;
-extern pf_key_t g_pf_mrsigner_key;
-extern pf_key_t g_pf_wrap_key;
-extern bool g_pf_wrap_key_set;
-
 typedef enum _pf_status_t {
     PF_STATUS_SUCCESS              = 0,
     PF_STATUS_UNKNOWN_ERROR        = -1,
@@ -296,16 +291,6 @@ pf_status_t pf_set_size(pf_context_t* pf, uint64_t size);
  */
 pf_status_t pf_rename(pf_context_t* pf, const char* new_path);
 
-/*!
- * \brief Get underlying handle of a PF.
- *
- * \param      pf      PF context.
- * \param[out] handle  Handle to the backing file.
- *
- * \returns PF status.
- */
-pf_status_t pf_get_handle(pf_context_t* pf, pf_handle_t* handle);
-
 /*!
  * \brief Flush any pending data of a protected file to disk.
  *
diff --git a/common/src/protected_files/protected_files_format.h b/common/src/protected_files/protected_files_format.h
index 4473dc9ae4..0e33a10bc2 100644
--- a/common/src/protected_files/protected_files_format.h
+++ b/common/src/protected_files/protected_files_format.h
@@ -14,7 +14,6 @@
 
 #include <limits.h>
 
-#include "list.h"
 #include "protected_files.h"
 
 #define PF_FILE_ID       0x46505f5346415247 /* GRAFS_PF */
@@ -53,9 +52,7 @@ typedef struct _metadata_encrypted {
 
 typedef uint8_t metadata_encrypted_blob_t[sizeof(metadata_encrypted_t)];
 
-#define METADATA_NODE_SIZE PF_NODE_SIZE
-
-typedef uint8_t metadata_padding_t[METADATA_NODE_SIZE -
+typedef uint8_t metadata_padding_t[PF_NODE_SIZE -
                                    (sizeof(metadata_plain_t) + sizeof(metadata_encrypted_blob_t))];
 
 typedef struct _metadata_node {
@@ -102,18 +99,16 @@ static_assert(sizeof(encrypted_node_t) == PF_NODE_SIZE, "sizeof(encrypted_node_t
 
 #define MAX_PAGES_IN_CACHE 48
 
-typedef enum {
+enum {
     FILE_MHT_NODE_TYPE  = 1,
     FILE_DATA_NODE_TYPE = 2,
-} mht_node_type_e;
+};
 
 // make sure these are the same size
 static_assert(sizeof(mht_node_t) == sizeof(data_node_t),
               "sizeof(mht_node_t) == sizeof(data_node_t)");
 
-DEFINE_LIST(_file_node);
 typedef struct _file_node {
-    LIST_TYPE(_file_node) list;
     uint8_t type;
     uint64_t node_number;
     struct _file_node* parent;
@@ -127,7 +122,6 @@ typedef struct _file_node {
         data_node_t data;
     } decrypted;
 } file_node_t;
-DEFINE_LISTP(_file_node);
 
 typedef struct {
     uint32_t index;