Move parts of roots.cpp to libfs_mgr am: 0f339e27bb
am: 6e232ed3ce
Change-Id: I0bee9493d0fe53fe4fd5150b9e81b295eefb4f70
diff --git a/roots.cpp b/roots.cpp
index 7dc4ec3..d448e6e 100644
--- a/roots.cpp
+++ b/roots.cpp
@@ -39,13 +39,12 @@
#include <cryptfs.h>
#include <ext4_utils/wipe.h>
#include <fs_mgr.h>
+#include <fs_mgr/roots.h>
#include <fs_mgr_dm_linear.h>
#include "otautil/mounts.h"
static struct fstab* fstab = nullptr;
-static bool did_map_logical_partitions = false;
-static constexpr const char* SYSTEM_ROOT = "/system";
extern struct selabel_handle* sehandle;
@@ -77,130 +76,18 @@
return fs_mgr_get_entry_for_mount_point(fstab, mount_point);
}
-// Finds the volume specified by the given path. fs_mgr_get_entry_for_mount_point() does exact match
-// only, so it attempts the prefixes recursively (e.g. "/cache/recovery/last_log",
-// "/cache/recovery", "/cache", "/" for a given path of "/cache/recovery/last_log") and returns the
-// first match or nullptr.
-static Volume* volume_for_path(const char* path) {
- if (path == nullptr || path[0] == '\0') return nullptr;
- std::string str(path);
- while (true) {
- Volume* result = fs_mgr_get_entry_for_mount_point(fstab, str);
- if (result != nullptr || str == "/") {
- return result;
- }
- size_t slash = str.find_last_of('/');
- if (slash == std::string::npos) return nullptr;
- if (slash == 0) {
- str = "/";
- } else {
- str = str.substr(0, slash);
- }
- }
- return nullptr;
-}
-
// Mount the volume specified by path at the given mount_point.
int ensure_path_mounted_at(const char* path, const char* mount_point) {
- Volume* v = volume_for_path(path);
- if (v == nullptr) {
- LOG(ERROR) << "unknown volume for path [" << path << "]";
- return -1;
- }
- if (strcmp(v->fs_type, "ramdisk") == 0) {
- // The ramdisk is always mounted.
- return 0;
- }
-
- if (!scan_mounted_volumes()) {
- LOG(ERROR) << "Failed to scan mounted volumes";
- return -1;
- }
-
- if (!mount_point) {
- mount_point = v->mount_point;
- }
-
- // If we can't acquire the block device for a logical partition, it likely
- // was never created. In that case we try to create it.
- if (fs_mgr_is_logical(v) && !fs_mgr_update_logical_partition(v)) {
- if (did_map_logical_partitions) {
- LOG(ERROR) << "Failed to find block device for partition";
- return -1;
- }
- std::string super_name = fs_mgr_get_super_partition_name();
- if (!android::fs_mgr::CreateLogicalPartitions(super_name)) {
- LOG(ERROR) << "Failed to create logical partitions";
- return -1;
- }
- did_map_logical_partitions = true;
- if (!fs_mgr_update_logical_partition(v)) {
- LOG(ERROR) << "Failed to find block device for partition";
- return -1;
- }
- }
-
- const MountedVolume* mv = find_mounted_volume_by_mount_point(mount_point);
- if (mv != nullptr) {
- // Volume is already mounted.
- return 0;
- }
-
- mkdir(mount_point, 0755); // in case it doesn't already exist
-
- if (strcmp(v->fs_type, "ext4") == 0 || strcmp(v->fs_type, "squashfs") == 0 ||
- strcmp(v->fs_type, "vfat") == 0 || strcmp(v->fs_type, "f2fs") == 0) {
- int result = mount(v->blk_device, mount_point, v->fs_type, v->flags, v->fs_options);
- if (result == -1 && fs_mgr_is_formattable(v)) {
- PLOG(ERROR) << "Failed to mount " << mount_point << "; formatting";
- bool crypt_footer = fs_mgr_is_encryptable(v) && !strcmp(v->key_loc, "footer");
- if (fs_mgr_do_format(v, crypt_footer) == 0) {
- result = mount(v->blk_device, mount_point, v->fs_type, v->flags, v->fs_options);
- } else {
- PLOG(ERROR) << "Failed to format " << mount_point;
- return -1;
- }
- }
-
- if (result == -1) {
- PLOG(ERROR) << "Failed to mount " << mount_point;
- return -1;
- }
- return 0;
- }
-
- LOG(ERROR) << "unknown fs_type \"" << v->fs_type << "\" for " << mount_point;
- return -1;
+ return android::fs_mgr::EnsurePathMounted(fstab, path, mount_point) ? 0 : -1;
}
int ensure_path_mounted(const char* path) {
// Mount at the default mount point.
- return ensure_path_mounted_at(path, nullptr);
+ return android::fs_mgr::EnsurePathMounted(fstab, path) ? 0 : -1;
}
int ensure_path_unmounted(const char* path) {
- const Volume* v = volume_for_path(path);
- if (v == nullptr) {
- LOG(ERROR) << "unknown volume for path [" << path << "]";
- return -1;
- }
- if (strcmp(v->fs_type, "ramdisk") == 0) {
- // The ramdisk is always mounted; you can't unmount it.
- return -1;
- }
-
- if (!scan_mounted_volumes()) {
- LOG(ERROR) << "Failed to scan mounted volumes";
- return -1;
- }
-
- MountedVolume* mv = find_mounted_volume_by_mount_point(v->mount_point);
- if (mv == nullptr) {
- // Volume is already unmounted.
- return 0;
- }
-
- return unmount_mounted_volume(mv);
+ return android::fs_mgr::EnsurePathUnmounted(fstab, path) ? 0 : -1;
}
static int exec_cmd(const std::vector<std::string>& args) {
@@ -249,7 +136,7 @@
}
int format_volume(const char* volume, const char* directory) {
- const Volume* v = volume_for_path(volume);
+ const Volume* v = android::fs_mgr::GetEntryForPath(fstab, volume);
if (v == nullptr) {
LOG(ERROR) << "unknown volume \"" << volume << "\"";
return -1;
@@ -407,13 +294,9 @@
}
bool logical_partitions_mapped() {
- return did_map_logical_partitions;
+ return android::fs_mgr::LogicalPartitionsMapped();
}
std::string get_system_root() {
- if (volume_for_mount_point(SYSTEM_ROOT) == nullptr) {
- return "/";
- } else {
- return SYSTEM_ROOT;
- }
+ return android::fs_mgr::GetSystemRoot();
}
diff --git a/tests/Android.bp b/tests/Android.bp
index 5165ccb..1d6a056 100644
--- a/tests/Android.bp
+++ b/tests/Android.bp
@@ -94,6 +94,7 @@
"libhidltransport",
"libhwbinder_noltopgo",
"libbinderthreadstate",
+ "liblp",
"libvndksupport",
"libtinyxml2",
]