statx: add new struct statx fields and corresponding mask macros

include/sys/stat.h

@@ -120,6 +120,9 @@ int lchmod(const char *, mode_t);
 #define STATX_BASIC_STATS 0x7ffU
 #define STATX_BTIME 0x800U
 #define STATX_ALL 0xfffU
+#define STATX_MNT_ID 0x1000U
+#define STATX_DIOALIGN 0x2000U
+#define STATX_MNT_ID_UNIQUE 0x4000U
 
 #define STATX_ATTR_COMPRESSED 0x4
 #define STATX_ATTR_IMMUTABLE 0x10
@@ -157,7 +160,11 @@ struct statx {
 	uint32_t stx_rdev_minor;
 	uint32_t stx_dev_major;
 	uint32_t stx_dev_minor;
-	uint64_t __pad1[14];
+	uint64_t stx_mnt_id;
+	uint32_t stx_dio_mem_align;
+	uint32_t stx_dio_offet_align;
+	uint64_t stx_subvol;
+	uint64_t __pad1[11];
 };
 
 int statx(int, const char *__restrict, int, unsigned, struct statx *__restrict);