Merge "Add more mounting options to updater mount function."
diff --git a/updater/updater_runtime.cpp b/updater/updater_runtime.cpp
index c4222a5..b1b8863 100644
--- a/updater/updater_runtime.cpp
+++ b/updater/updater_runtime.cpp
@@ -43,10 +43,62 @@
return std::string(name);
}
+static struct {
+ const char* name;
+ unsigned flag;
+} mount_flags_list[] = {
+ { "noatime", MS_NOATIME },
+ { "noexec", MS_NOEXEC },
+ { "nosuid", MS_NOSUID },
+ { "nodev", MS_NODEV },
+ { "nodiratime", MS_NODIRATIME },
+ { "ro", MS_RDONLY },
+ { "rw", 0 },
+ { "remount", MS_REMOUNT },
+ { "bind", MS_BIND },
+ { "rec", MS_REC },
+ { "unbindable", MS_UNBINDABLE },
+ { "private", MS_PRIVATE },
+ { "slave", MS_SLAVE },
+ { "shared", MS_SHARED },
+ { "defaults", 0 },
+ { 0, 0 },
+};
+
+static bool setMountFlag(const std::string& flag, unsigned* mount_flags) {
+ for (const auto& [name, value] : mount_flags_list) {
+ if (flag == name) {
+ *mount_flags |= value;
+ return true;
+ }
+ }
+ return false;
+}
+
+static bool parseMountFlags(const std::string& flags, unsigned* mount_flags,
+ std::string* fs_options) {
+ bool is_flag_set = false;
+ std::vector<std::string> flag_list;
+ for (const auto& flag : android::base::Split(flags, ",")) {
+ if (!setMountFlag(flag, mount_flags)) {
+ // Unknown flag, so it must be a filesystem specific option.
+ flag_list.push_back(flag);
+ } else {
+ is_flag_set = true;
+ }
+ }
+ *fs_options = android::base::Join(flag_list, ',');
+ return is_flag_set;
+}
+
int UpdaterRuntime::Mount(const std::string_view location, const std::string_view mount_point,
const std::string_view fs_type, const std::string_view mount_options) {
std::string mount_point_string(mount_point);
+ std::string mount_options_string(mount_options);
char* secontext = nullptr;
+ unsigned mount_flags = 0;
+ std::string fs_options;
+
if (sehandle_) {
selabel_lookup(sehandle_, &secontext, mount_point_string.c_str(), 0755);
setfscreatecon(secontext);
@@ -59,9 +111,13 @@
setfscreatecon(nullptr);
}
+ if (!parseMountFlags(mount_options_string, &mount_flags, &fs_options)) {
+ // Fall back to default
+ mount_flags = MS_NOATIME | MS_NODEV | MS_NODIRATIME;
+ }
+
return mount(std::string(location).c_str(), mount_point_string.c_str(),
- std::string(fs_type).c_str(), MS_NOATIME | MS_NODEV | MS_NODIRATIME,
- std::string(mount_options).c_str());
+ std::string(fs_type).c_str(), mount_flags, fs_options.c_str());
}
bool UpdaterRuntime::IsMounted(const std::string_view mount_point) const {
