roots.cpp: convert to C++ Fstab (d81b8e3d) · Commits · e / os / android_bootable_recovery

fsck_unshare_blocks.cpp

+1 −1

Original line number	Diff line number	Diff line
		@@ -121,7 +121,7 @@ bool do_fsck_unshare_blocks() {

		// Temporarily mount system so we can copy e2fsck_static.
		std::string system_root = get_system_root();
		bool mounted = ensure_path_mounted_at(system_root.c_str(), "/mnt/system") != -1;
		bool mounted = ensure_path_mounted_at(system_root, "/mnt/system") != -1;
		partitions.push_back(system_root);

		if (!mounted) {

install.cpp

+2 −2

Original line number	Diff line number	Diff line
		@@ -595,9 +595,9 @@ static int really_install_package(const std::string& path, bool* wipe_cache, boo

		if (needs_mount) {
		if (path[0] == '@') {
		ensure_path_mounted(path.substr(1).c_str());
		ensure_path_mounted(path.substr(1));
		} else {
		ensure_path_mounted(path.c_str());
		ensure_path_mounted(path);
		}
		}

logging.cpp

+1 −1

Original line number	Diff line number	Diff line
		@@ -46,7 +46,7 @@ static const std::string LAST_LOG_FILTER = "recovery/last_log";
		// fopen(3)'s the given file, by mounting volumes and making parent dirs as necessary. Returns the
		// file pointer, or nullptr on error.
		static FILE* fopen_path(const std::string& path, const char* mode) {
		if (ensure_path_mounted(path.c_str()) != 0) {
		if (ensure_path_mounted(path) != 0) {
		LOG(ERROR) << "Can't mount " << path;
		return nullptr;
		}

recovery.cpp

+3 −3

Original line number	Diff line number	Diff line
		@@ -294,7 +294,7 @@ bool SetUsbConfig(const std::string& state) {

		// Returns the selected filename, or an empty string.
		static std::string browse_directory(const std::string& path, Device* device) {
		ensure_path_mounted(path.c_str());
		ensure_path_mounted(path);

		std::unique_ptr<DIR, decltype(&closedir)> d(opendir(path.c_str()), closedir);
		if (!d) {
		@@ -572,7 +572,7 @@ static void choose_recovery_file(Device* device) {
		log_file += "." + std::to_string(i);
		}

		if (ensure_path_mounted(log_file.c_str()) == 0 && access(log_file.c_str(), R_OK) == 0) {
		if (ensure_path_mounted(log_file) == 0 && access(log_file.c_str(), R_OK) == 0) {
		entries.push_back(std::move(log_file));
		}
		};
		@@ -836,7 +836,7 @@ static Device::BuiltinAction prompt_and_wait(Device* device, int status) {
		}
		case Device::MOUNT_SYSTEM:
		// the system partition is mounted at /mnt/system
		if (ensure_path_mounted_at(get_system_root().c_str(), "/mnt/system") != -1) {
		if (ensure_path_mounted_at(get_system_root(), "/mnt/system") != -1) {
		ui->Print("Mounted /system.\n");
		}
		break;

roots.cpp

+44 −48

Original line number	Diff line number	Diff line
		@@ -29,6 +29,7 @@
		#include <unistd.h>

		#include <algorithm>
		#include <iostream>
		#include <string>
		#include <vector>

		@@ -44,50 +45,48 @@

		#include "otautil/mounts.h"

		static struct fstab* fstab = nullptr;
		static Fstab fstab;

		extern struct selabel_handle* sehandle;

		void load_volume_table() {
		fstab = fs_mgr_read_fstab_default();
		if (!fstab) {
		if (!ReadDefaultFstab(&fstab)) {
		LOG(ERROR) << "Failed to read default fstab";
		return;
		}

		int ret = fs_mgr_add_entry(fstab, "/tmp", "ramdisk", "ramdisk");
		if (ret == -1) {
		LOG(ERROR) << "Failed to add /tmp entry to fstab";
		fs_mgr_free_fstab(fstab);
		fstab = nullptr;
		return;
		}
		fstab.emplace_back(FstabEntry{
		.mount_point = "/tmp", .fs_type = "ramdisk", .blk_device = "ramdisk", .length = 0 });

		printf("recovery filesystem table\n");
		printf("=========================\n");
		for (int i = 0; i < fstab->num_entries; ++i) {
		const Volume* v = &fstab->recs[i];
		printf(" %d %s %s %s %" PRId64 "\n", i, v->mount_point, v->fs_type, v->blk_device, v->length);
		std::cout << "recovery filesystem table" << std::endl << "=========================" << std::endl;
		for (size_t i = 0; i < fstab.size(); ++i) {
		const auto& entry = fstab[i];
		std::cout << " " << i << " " << entry.mount_point << " "
		<< " " << entry.fs_type << " " << entry.blk_device << " " << entry.length
		<< std::endl;
		}
		printf("\n");
		std::cout << std::endl;
		}

		Volume* volume_for_mount_point(const std::string& mount_point) {
		return fs_mgr_get_entry_for_mount_point(fstab, mount_point);
		auto it = std::find_if(fstab.begin(), fstab.end(), [&mount_point](const auto& entry) {
		return entry.mount_point == mount_point;
		});
		return it == fstab.end() ? nullptr : &*it;
		}

		// Mount the volume specified by path at the given mount_point.
		int ensure_path_mounted_at(const char* path, const char* mount_point) {
		return android::fs_mgr::EnsurePathMounted(fstab, path, mount_point) ? 0 : -1;
		int ensure_path_mounted_at(const std::string& path, const std::string& mount_point) {
		return android::fs_mgr::EnsurePathMounted(&fstab, path, mount_point) ? 0 : -1;
		}

		int ensure_path_mounted(const char* path) {
		int ensure_path_mounted(const std::string& path) {
		// Mount at the default mount point.
		return android::fs_mgr::EnsurePathMounted(fstab, path) ? 0 : -1;
		return android::fs_mgr::EnsurePathMounted(&fstab, path) ? 0 : -1;
		}

		int ensure_path_unmounted(const char* path) {
		return android::fs_mgr::EnsurePathUnmounted(fstab, path) ? 0 : -1;
		int ensure_path_unmounted(const std::string& path) {
		return android::fs_mgr::EnsurePathUnmounted(&fstab, path) ? 0 : -1;
		}

		static int exec_cmd(const std::vector<std::string>& args) {
		@@ -135,17 +134,17 @@ static int64_t get_file_size(int fd, uint64_t reserve_len) {
		return computed_size;
		}

		int format_volume(const char* volume, const char* directory) {
		const Volume* v = android::fs_mgr::GetEntryForPath(fstab, volume);
		int format_volume(const std::string& volume, const std::string& directory) {
		const FstabEntry* v = android::fs_mgr::GetEntryForPath(&fstab, volume);
		if (v == nullptr) {
		LOG(ERROR) << "unknown volume \"" << volume << "\"";
		return -1;
		}
		if (strcmp(v->fs_type, "ramdisk") == 0) {
		if (v->fs_type == "ramdisk") {
		LOG(ERROR) << "can't format_volume \"" << volume << "\"";
		return -1;
		}
		if (strcmp(v->mount_point, volume) != 0) {
		if (v->mount_point != volume) {
		LOG(ERROR) << "can't give path \"" << volume << "\" to format_volume";
		return -1;
		}
		@@ -153,16 +152,16 @@ int format_volume(const char* volume, const char* directory) {
		LOG(ERROR) << "format_volume: Failed to unmount \"" << v->mount_point << "\"";
		return -1;
		}
		if (strcmp(v->fs_type, "ext4") != 0 && strcmp(v->fs_type, "f2fs") != 0) {
		if (v->fs_type != "ext4" && v->fs_type != "f2fs") {
		LOG(ERROR) << "format_volume: fs_type \"" << v->fs_type << "\" unsupported";
		return -1;
		}

		// If there's a key_loc that looks like a path, it should be a block device for storing encryption
		// metadata. Wipe it too.
		if (v->key_loc != nullptr && v->key_loc[0] == '/') {
		if (!v->key_loc.empty() && v->key_loc[0] == '/') {
		LOG(INFO) << "Wiping " << v->key_loc;
		int fd = open(v->key_loc, O_WRONLY \| O_CREAT, 0644);
		int fd = open(v->key_loc.c_str(), O_WRONLY \| O_CREAT, 0644);
		if (fd == -1) {
		PLOG(ERROR) << "format_volume: Failed to open " << v->key_loc;
		return -1;
		@@ -174,9 +173,8 @@ int format_volume(const char* volume, const char* directory) {
		int64_t length = 0;
		if (v->length > 0) {
		length = v->length;
		} else if (v->length < 0 \|\|
		(v->key_loc != nullptr && strcmp(v->key_loc, "footer") == 0)) {
		android::base::unique_fd fd(open(v->blk_device, O_RDONLY));
		} else if (v->length < 0 \|\| v->key_loc == "footer") {
		android::base::unique_fd fd(open(v->blk_device.c_str(), O_RDONLY));
		if (fd == -1) {
		PLOG(ERROR) << "format_volume: failed to open " << v->blk_device;
		return -1;
		@@ -190,7 +188,7 @@ int format_volume(const char* volume, const char* directory) {
		}
		}

		if (strcmp(v->fs_type, "ext4") == 0) {
		if (v->fs_type == "ext4") {
		static constexpr int kBlockSize = 4096;
		std::vector<std::string> mke2fs_args = {
		"/system/bin/mke2fs", "-F", "-t", "ext4", "-b", std::to_string(kBlockSize),
		@@ -213,7 +211,7 @@ int format_volume(const char* volume, const char* directory) {
		}

		int result = exec_cmd(mke2fs_args);
		if (result == 0 && directory != nullptr) {
		if (result == 0 && !directory.empty()) {
		std::vector<std::string> e2fsdroid_args = {
		"/system/bin/e2fsdroid", "-e", "-f", directory, "-a", volume, v->blk_device,
		};
		@@ -242,7 +240,7 @@ int format_volume(const char* volume, const char* directory) {
		}

		int result = exec_cmd(make_f2fs_cmd);
		if (result == 0 && directory != nullptr) {
		if (result == 0 && !directory.empty()) {
		cmd = "/sbin/sload.f2fs";
		// clang-format off
		std::vector<std::string> sload_f2fs_cmd = {
		@@ -261,31 +259,29 @@ int format_volume(const char* volume, const char* directory) {
		return 0;
		}

		int format_volume(const char* volume) {
		return format_volume(volume, nullptr);
		int format_volume(const std::string& volume) {
		return format_volume(volume, "");
		}

		int setup_install_mounts() {
		if (fstab == nullptr) {
		if (fstab.empty()) {
		LOG(ERROR) << "can't set up install mounts: no fstab loaded";
		return -1;
		}
		for (int i = 0; i < fstab->num_entries; ++i) {
		const Volume* v = fstab->recs + i;

		for (const FstabEntry& entry : fstab) {
		// We don't want to do anything with "/".
		if (strcmp(v->mount_point, "/") == 0) {
		if (entry.mount_point == "/") {
		continue;
		}

		if (strcmp(v->mount_point, "/tmp") == 0 \|\| strcmp(v->mount_point, "/cache") == 0) {
		if (ensure_path_mounted(v->mount_point) != 0) {
		LOG(ERROR) << "Failed to mount " << v->mount_point;
		if (entry.mount_point == "/tmp" \|\| entry.mount_point == "/cache") {
		if (ensure_path_mounted(entry.mount_point) != 0) {
		LOG(ERROR) << "Failed to mount " << entry.mount_point;
		return -1;
		}
		} else {
		if (ensure_path_unmounted(v->mount_point) != 0) {
		LOG(ERROR) << "Failed to unmount " << v->mount_point;
		if (ensure_path_unmounted(entry.mount_point) != 0) {
		LOG(ERROR) << "Failed to unmount " << entry.mount_point;
		return -1;
		}
		}