From 246c18caf5193e2243dfcbf434e6340039b64f8c Mon Sep 17 00:00:00 2001
From: Elliott Hughes <enh@google.com>
Date: Fri, 9 Oct 2015 11:52:00 -0700
Subject: [PATCH] Switch fs_mgr_verity.c to C++.

This is the minimal change just to keep it building, and doesn't
attempt to clean up any of the code.

Change-Id: I975710322ae33d8946497df25bf85b2fe28976a4
---
 fs_mgr/Android.mk                             |  2 +-
 fs_mgr/fs_mgr_priv.h                          |  4 ++++
 fs_mgr/fs_mgr_priv_verity.h                   |  7 +++++++
 fs_mgr/{fs_mgr_verity.c => fs_mgr_verity.cpp} | 18 ++++++++----------
 4 files changed, 20 insertions(+), 11 deletions(-)
 rename fs_mgr/{fs_mgr_verity.c => fs_mgr_verity.cpp} (98%)

diff --git a/fs_mgr/Android.mk b/fs_mgr/Android.mk
index 5e6c6f94f..8b09f53fb 100644
--- a/fs_mgr/Android.mk
+++ b/fs_mgr/Android.mk
@@ -3,7 +3,7 @@
 LOCAL_PATH:= $(call my-dir)
 include $(CLEAR_VARS)
 
-LOCAL_SRC_FILES:= fs_mgr.c fs_mgr_verity.c fs_mgr_fstab.c
+LOCAL_SRC_FILES:= fs_mgr.c fs_mgr_verity.cpp fs_mgr_fstab.c
 LOCAL_SRC_FILES += fs_mgr_format.c fs_mgr_slotselect.c
 
 LOCAL_C_INCLUDES := $(LOCAL_PATH)/include \
diff --git a/fs_mgr/fs_mgr_priv.h b/fs_mgr/fs_mgr_priv.h
index 367ab6e28..ba0e097b0 100644
--- a/fs_mgr/fs_mgr_priv.h
+++ b/fs_mgr/fs_mgr_priv.h
@@ -20,6 +20,8 @@
 #include <cutils/klog.h>
 #include <fs_mgr.h>
 
+__BEGIN_DECLS
+
 #define INFO(x...)    KLOG_INFO("fs_mgr", x)
 #define WARNING(x...) KLOG_WARNING("fs_mgr", x)
 #define ERROR(x...)   KLOG_ERROR("fs_mgr", x)
@@ -86,4 +88,6 @@
 int fs_mgr_set_blk_ro(const char *blockdev);
 int fs_mgr_update_for_slotselect(struct fstab *fstab);
 
+__END_DECLS
+
 #endif /* __CORE_FS_MGR_PRIV_H */
diff --git a/fs_mgr/fs_mgr_priv_verity.h b/fs_mgr/fs_mgr_priv_verity.h
index f90e59683..cd673f386 100644
--- a/fs_mgr/fs_mgr_priv_verity.h
+++ b/fs_mgr/fs_mgr_priv_verity.h
@@ -14,7 +14,14 @@
  * limitations under the License.
  */
 
+#include <sys/cdefs.h>
+
 #define FS_MGR_SETUP_VERITY_DISABLED -2
 #define FS_MGR_SETUP_VERITY_FAIL -1
 #define FS_MGR_SETUP_VERITY_SUCCESS 0
+
+__BEGIN_DECLS
+
 int fs_mgr_setup_verity(struct fstab_rec *fstab);
+
+__END_DECLS
diff --git a/fs_mgr/fs_mgr_verity.c b/fs_mgr/fs_mgr_verity.cpp
similarity index 98%
rename from fs_mgr/fs_mgr_verity.c
rename to fs_mgr/fs_mgr_verity.cpp
index eddc3e4f8..961f3c601 100644
--- a/fs_mgr/fs_mgr_verity.c
+++ b/fs_mgr/fs_mgr_verity.cpp
@@ -40,6 +40,7 @@
 #include "ext4_sb.h"
 #include "squashfs_utils.h"
 
+#include "fs_mgr.h"
 #include "fs_mgr_priv.h"
 #include "fs_mgr_priv_verity.h"
 
@@ -74,18 +75,15 @@ struct verity_state {
 
 extern struct fs_info info;
 
-static RSAPublicKey *load_key(char *path)
+static RSAPublicKey *load_key(const char *path)
 {
-    FILE *f;
-    RSAPublicKey *key;
-
-    key = malloc(sizeof(RSAPublicKey));
+    RSAPublicKey* key = static_cast<RSAPublicKey*>(malloc(sizeof(RSAPublicKey)));
     if (!key) {
         ERROR("Can't malloc key\n");
         return NULL;
     }
 
-    f = fopen(path, "r");
+    FILE* f = fopen(path, "r");
     if (!f) {
         ERROR("Can't open '%s'\n", path);
         free(key);
@@ -275,7 +273,7 @@ static int read_verity_metadata(uint64_t device_size, char *block_device, char *
 #endif
 
     if (magic_number != VERITY_METADATA_MAGIC_NUMBER) {
-        ERROR("Couldn't find verity metadata at offset %"PRIu64"!\n", device_size);
+        ERROR("Couldn't find verity metadata at offset %" PRIu64 "!\n", device_size);
         goto out;
     }
 
@@ -314,7 +312,7 @@ static int read_verity_metadata(uint64_t device_size, char *block_device, char *
     }
 
     // get the table + null terminator
-    *table = malloc(table_length + 1);
+    *table = static_cast<char*>(malloc(table_length + 1));
     if (!*table) {
         ERROR("Couldn't allocate memory for verity table!\n");
         goto out;
@@ -887,7 +885,7 @@ out:
 
 int fs_mgr_update_verity_state(fs_mgr_verity_state_callback callback)
 {
-    _Alignas(struct dm_ioctl) char buffer[DM_BUF_SIZE];
+    alignas(dm_ioctl) char buffer[DM_BUF_SIZE];
     bool use_state = true;
     char fstab_filename[PROPERTY_VALUE_MAX + sizeof(FSTAB_PREFIX)];
     char *mount_point;
@@ -989,7 +987,7 @@ int fs_mgr_setup_verity(struct fstab_rec *fstab) {
     int verity_table_length = 0;
     uint64_t device_size = 0;
 
-    _Alignas(struct dm_ioctl) char buffer[DM_BUF_SIZE];
+    alignas(dm_ioctl) char buffer[DM_BUF_SIZE];
     struct dm_ioctl *io = (struct dm_ioctl *) buffer;
     char *mount_point = basename(fstab->mount_point);