kernel: Syncronize upstream changes (#198)

* Cherry-picked range: (kernel)
ebea31daa8..6915b62b9a

* Also merged unmerged pr:
https://github.com/tiann/KernelSU/pull/ 2909

Co-authored-by: Ylarod <me@ylarod.cn>
Co-authored-by: 5ec1cff <56485584+5ec1cff@users.noreply.github.com>
Co-authored-by: backslashxx <118538522+backslashxx@users.noreply.github.com>
Co-authored-by: u9521 <63995396+u9521@users.noreply.github.com>
Co-authored-by: Wang Han <416810799@qq.com>

kernel/app_profile.h

@@ -0,0 +1,66 @@
+#ifndef __KSU_H_APP_PROFILE
+#define __KSU_H_APP_PROFILE
+
+#include <linux/types.h>
+
+// Forward declarations
+struct cred;
+
+#define KSU_APP_PROFILE_VER 2
+#define KSU_MAX_PACKAGE_NAME 256
+// NGROUPS_MAX for Linux is 65535 generally, but we only supports 32 groups.
+#define KSU_MAX_GROUPS 32
+#define KSU_SELINUX_DOMAIN 64
+
+struct root_profile {
+	int32_t uid;
+	int32_t gid;
+
+	int32_t groups_count;
+	int32_t groups[KSU_MAX_GROUPS];
+
+	// kernel_cap_t is u32[2] for capabilities v3
+	struct {
+		u64 effective;
+		u64 permitted;
+		u64 inheritable;
+	} capabilities;
+
+	char selinux_domain[KSU_SELINUX_DOMAIN];
+
+	int32_t namespaces;
+};
+
+struct non_root_profile {
+	bool umount_modules;
+};
+
+struct app_profile {
+	// It may be utilized for backward compatibility, although we have never explicitly made any promises regarding this.
+	u32 version;
+
+	// this is usually the package of the app, but can be other value for special apps
+	char key[KSU_MAX_PACKAGE_NAME];
+	int32_t current_uid;
+	bool allow_su;
+
+	union {
+		struct {
+			bool use_default;
+			char template_name[KSU_MAX_PACKAGE_NAME];
+
+			struct root_profile profile;
+		} rp_config;
+
+		struct {
+			bool use_default;
+
+			struct non_root_profile profile;
+		} nrp_config;
+	};
+};
+
+// Escalate current process to root with the appropriate profile
+void escape_with_root_profile(void);
+
+#endif