diff --git a/libc/kernel/uapi/linux/fsmap.h b/libc/kernel/uapi/linux/fsmap.h
new file mode 100644
index 0000000..fcfea79
--- /dev/null
+++ b/libc/kernel/uapi/linux/fsmap.h
@@ -0,0 +1,55 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   This header was automatically generated from a Linux kernel header
+ ***   of the same name, to make information necessary for userspace to
+ ***   call into the kernel available to libc.  It contains only constants,
+ ***   structures, and macros generated from the original header, and thus,
+ ***   contains no copyrightable information.
+ ***
+ ***   To edit the content of this header, modify the corresponding
+ ***   source file (e.g. under external/kernel-headers/original/) then
+ ***   run bionic/libc/kernel/tools/update_all.py
+ ***
+ ***   Any manual change here will be lost the next time this script will
+ ***   be run. You've been warned!
+ ***
+ ****************************************************************************
+ ****************************************************************************/
+#ifndef _LINUX_FSMAP_H
+#define _LINUX_FSMAP_H
+#include <linux/types.h>
+struct fsmap {
+  __u32 fmr_device;
+  __u32 fmr_flags;
+  __u64 fmr_physical;
+  __u64 fmr_owner;
+  __u64 fmr_offset;
+  __u64 fmr_length;
+  __u64 fmr_reserved[3];
+};
+struct fsmap_head {
+  __u32 fmh_iflags;
+  __u32 fmh_oflags;
+  __u32 fmh_count;
+  __u32 fmh_entries;
+  __u64 fmh_reserved[6];
+  struct fsmap fmh_keys[2];
+  struct fsmap fmh_recs[];
+};
+#define FMH_IF_VALID 0
+#define FMH_OF_DEV_T 0x1
+#define FMR_OF_PREALLOC 0x1
+#define FMR_OF_ATTR_FORK 0x2
+#define FMR_OF_EXTENT_MAP 0x4
+#define FMR_OF_SHARED 0x8
+#define FMR_OF_SPECIAL_OWNER 0x10
+#define FMR_OF_LAST 0x20
+#define FMR_OWNER(type,code) (((__u64) type << 32) | ((__u64) code & 0xFFFFFFFFULL))
+#define FMR_OWNER_TYPE(owner) ((__u32) ((__u64) owner >> 32))
+#define FMR_OWNER_CODE(owner) ((__u32) (((__u64) owner & 0xFFFFFFFFULL)))
+#define FMR_OWN_FREE FMR_OWNER(0, 1)
+#define FMR_OWN_UNKNOWN FMR_OWNER(0, 2)
+#define FMR_OWN_METADATA FMR_OWNER(0, 3)
+#define FS_IOC_GETFSMAP _IOWR('X', 59, struct fsmap_head)
+#endif