fastboot: call mke2fs tools to generate ext4 image
Set MKE2FS_CONFIG to empty to use mke2fs default configs
Test: fastboot --wipe-and-use-fbe
Bug: 35219933
Change-Id: Ibc97bb125899e1f1fe820d53709fdb2ab291c171
(cherry picked from commit d14d7c14cbe297614bf99dae9bf50b1fc342c44e)
diff --git a/fastboot/Android.mk b/fastboot/Android.mk
index 80def73..0b656aa 100644
--- a/fastboot/Android.mk
+++ b/fastboot/Android.mk
@@ -40,6 +40,7 @@
LOCAL_MODULE_TAGS := debug
LOCAL_MODULE_HOST_OS := darwin linux windows
LOCAL_CFLAGS += -Wall -Wextra -Werror -Wunreachable-code
+LOCAL_REQUIRED_MODULES := mke2fs e2fsdroid
LOCAL_SRC_FILES_linux := usb_linux.cpp
LOCAL_STATIC_LIBRARIES_linux := libselinux
diff --git a/fastboot/fs.cpp b/fastboot/fs.cpp
index 99ca7dd..f3c000e 100644
--- a/fastboot/fs.cpp
+++ b/fastboot/fs.cpp
@@ -10,14 +10,22 @@
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
+#ifndef WIN32
+#include <sys/wait.h>
+#endif
#include <unistd.h>
+#include <vector>
+#include <android-base/file.h>
+#include <android-base/stringprintf.h>
#include <android-base/unique_fd.h>
#include <ext4_utils/make_ext4fs.h>
#include <sparse/sparse.h>
+using android::base::StringPrintf;
using android::base::unique_fd;
+#ifdef WIN32
static int generate_ext4_image(const char* fileName, long long partSize, const std::string& initial_dir,
unsigned eraseBlkSize, unsigned logicalBlkSize)
{
@@ -34,6 +42,84 @@
}
return 0;
}
+#else
+static int exec_e2fs_cmd(const char* path, char* const argv[]) {
+ int status;
+ pid_t child;
+ if ((child = fork()) == 0) {
+ setenv("MKE2FS_CONFIG", "", 1);
+ execvp(path, argv);
+ _exit(EXIT_FAILURE);
+ }
+ if (child < 0) {
+ fprintf(stderr, "%s failed with fork %s\n", path, strerror(errno));
+ return -1;
+ }
+ if (TEMP_FAILURE_RETRY(waitpid(child, &status, 0)) == -1) {
+ fprintf(stderr, "%s failed with waitpid %s\n", path, strerror(errno));
+ return -1;
+ }
+ int ret = -1;
+ if (WIFEXITED(status)) {
+ ret = WEXITSTATUS(status);
+ if (ret != 0) {
+ fprintf(stderr, "%s failed with status %d\n", path, ret);
+ }
+ }
+ return ret;
+}
+
+static int generate_ext4_image(const char* fileName, long long partSize,
+ const std::string& initial_dir, unsigned eraseBlkSize,
+ unsigned logicalBlkSize) {
+ static constexpr int block_size = 4096;
+ const std::string exec_dir = android::base::GetExecutableDirectory();
+
+ const std::string mke2fs_path = exec_dir + "/mke2fs";
+ std::vector<const char*> mke2fs_args = {mke2fs_path.c_str(), "-t", "ext4", "-b"};
+
+ std::string block_size_str = std::to_string(block_size);
+ mke2fs_args.push_back(block_size_str.c_str());
+
+ std::string ext_attr = "android_sparse";
+ if (eraseBlkSize != 0 && logicalBlkSize != 0) {
+ int raid_stride = logicalBlkSize / block_size;
+ int raid_stripe_width = eraseBlkSize / block_size;
+ // stride should be the max of 8kb and logical block size
+ if (logicalBlkSize != 0 && logicalBlkSize < 8192) raid_stride = 8192 / block_size;
+ ext_attr += StringPrintf(",stride=%d,stripe-width=%d", raid_stride, raid_stripe_width);
+ }
+ mke2fs_args.push_back("-E");
+ mke2fs_args.push_back(ext_attr.c_str());
+ mke2fs_args.push_back(fileName);
+
+ std::string size_str = std::to_string(partSize / block_size);
+ mke2fs_args.push_back(size_str.c_str());
+ mke2fs_args.push_back(nullptr);
+
+ int ret = exec_e2fs_cmd(mke2fs_args[0], const_cast<char**>(mke2fs_args.data()));
+ if (ret != 0) {
+ fprintf(stderr, "mke2fs failed: %d\n", ret);
+ return -1;
+ }
+
+ if (initial_dir.empty()) {
+ return 0;
+ }
+
+ const std::string e2fsdroid_path = exec_dir + "/e2fsdroid";
+ std::vector<const char*> e2fsdroid_args = {e2fsdroid_path.c_str(), "-f", initial_dir.c_str(),
+ fileName, nullptr};
+
+ ret = exec_e2fs_cmd(e2fsdroid_args[0], const_cast<char**>(e2fsdroid_args.data()));
+ if (ret != 0) {
+ fprintf(stderr, "e2fsdroid failed: %d\n", ret);
+ return -1;
+ }
+
+ return 0;
+}
+#endif
#ifdef USE_F2FS
static int generate_f2fs_image(const char* fileName, long long partSize, const std::string& initial_dir,
