diff --git a/libc/kernel/uapi/linux/incrementalfs.h b/libc/kernel/uapi/linux/incrementalfs.h
new file mode 100644
index 0000000..531760d
--- /dev/null
+++ b/libc/kernel/uapi/linux/incrementalfs.h
@@ -0,0 +1,116 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   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 _UAPI_LINUX_INCREMENTALFS_H
+#define _UAPI_LINUX_INCREMENTALFS_H
+#include <linux/limits.h>
+#include <linux/ioctl.h>
+#include <linux/types.h>
+#include <linux/xattr.h>
+#define INCFS_NAME "incremental-fs"
+#define INCFS_MAGIC_NUMBER (0x5346434e49ul)
+#define INCFS_DATA_FILE_BLOCK_SIZE 4096
+#define INCFS_HEADER_VER 1
+#define INCFS_MAX_HASH_SIZE 32
+#define INCFS_MAX_FILE_ATTR_SIZE 512
+#define INCFS_PENDING_READS_FILENAME ".pending_reads"
+#define INCFS_LOG_FILENAME ".log"
+#define INCFS_XATTR_ID_NAME (XATTR_USER_PREFIX "incfs.id")
+#define INCFS_XATTR_SIZE_NAME (XATTR_USER_PREFIX "incfs.size")
+#define INCFS_XATTR_METADATA_NAME (XATTR_USER_PREFIX "incfs.metadata")
+#define INCFS_MAX_SIGNATURE_SIZE 8096
+#define INCFS_SIGNATURE_VERSION 2
+#define INCFS_SIGNATURE_SECTIONS 2
+#define INCFS_IOCTL_BASE_CODE 'g'
+#define INCFS_IOC_CREATE_FILE _IOWR(INCFS_IOCTL_BASE_CODE, 30, struct incfs_new_file_args)
+#define INCFS_IOC_READ_FILE_SIGNATURE _IOR(INCFS_IOCTL_BASE_CODE, 31, struct incfs_get_file_sig_args)
+#define INCFS_IOC_FILL_BLOCKS _IOR(INCFS_IOCTL_BASE_CODE, 32, struct incfs_fill_blocks)
+#define INCFS_IOC_PERMIT_FILL _IOW(INCFS_IOCTL_BASE_CODE, 33, struct incfs_permit_fill)
+#define INCFS_IOC_GET_FILLED_BLOCKS _IOR(INCFS_IOCTL_BASE_CODE, 34, struct incfs_get_filled_blocks_args)
+enum incfs_compression_alg {
+  COMPRESSION_NONE = 0,
+  COMPRESSION_LZ4 = 1
+};
+enum incfs_block_flags {
+  INCFS_BLOCK_FLAGS_NONE = 0,
+  INCFS_BLOCK_FLAGS_HASH = 1,
+};
+typedef struct {
+  __u8 bytes[16];
+} incfs_uuid_t __attribute__((aligned(8)));
+struct incfs_pending_read_info {
+  incfs_uuid_t file_id;
+  __aligned_u64 timestamp_us;
+  __u32 block_index;
+  __u32 serial_number;
+};
+struct incfs_fill_block {
+  __u32 block_index;
+  __u32 data_len;
+  __aligned_u64 data;
+  __u8 compression;
+  __u8 flags;
+  __u16 reserved1;
+  __u32 reserved2;
+  __aligned_u64 reserved3;
+};
+struct incfs_fill_blocks {
+  __u64 count;
+  __aligned_u64 fill_blocks;
+};
+struct incfs_permit_fill {
+  __u32 file_descriptor;
+};
+enum incfs_hash_tree_algorithm {
+  INCFS_HASH_TREE_NONE = 0,
+  INCFS_HASH_TREE_SHA256 = 1
+};
+struct incfs_new_file_args {
+  incfs_uuid_t file_id;
+  __aligned_u64 size;
+  __u16 mode;
+  __u16 reserved1;
+  __u32 reserved2;
+  __aligned_u64 directory_path;
+  __aligned_u64 file_name;
+  __aligned_u64 file_attr;
+  __u32 file_attr_len;
+  __u32 reserved4;
+  __aligned_u64 signature_info;
+  __aligned_u64 signature_size;
+  __aligned_u64 reserved6;
+};
+struct incfs_get_file_sig_args {
+  __aligned_u64 file_signature;
+  __u32 file_signature_buf_size;
+  __u32 file_signature_len_out;
+};
+struct incfs_filled_range {
+  __u32 begin;
+  __u32 end;
+};
+struct incfs_get_filled_blocks_args {
+  __aligned_u64 range_buffer;
+  __u32 range_buffer_size;
+  __u32 start_index;
+  __u32 end_index;
+  __u32 total_blocks_out;
+  __u32 range_buffer_size_out;
+  __u32 index_out;
+};
+#endif