diff --git a/libc/kernel/android/scsi/sg.h b/libc/kernel/android/scsi/sg.h
new file mode 100644
index 0000000..4472385
--- /dev/null
+++ b/libc/kernel/android/scsi/sg.h
@@ -0,0 +1,180 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   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 _SCSI_GENERIC_H
+#define _SCSI_GENERIC_H
+#include <linux/compiler.h>
+typedef struct sg_iovec {
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  void __user * iov_base;
+  size_t iov_len;
+} sg_iovec_t;
+typedef struct sg_io_hdr {
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  int interface_id;
+  int dxfer_direction;
+  unsigned char cmd_len;
+  unsigned char mx_sb_len;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  unsigned short iovec_count;
+  unsigned int dxfer_len;
+  void __user * dxferp;
+  unsigned char __user * cmdp;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  void __user * sbp;
+  unsigned int timeout;
+  unsigned int flags;
+  int pack_id;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  void __user * usr_ptr;
+  unsigned char status;
+  unsigned char masked_status;
+  unsigned char msg_status;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  unsigned char sb_len_wr;
+  unsigned short host_status;
+  unsigned short driver_status;
+  int resid;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  unsigned int duration;
+  unsigned int info;
+} sg_io_hdr_t;
+#define SG_INTERFACE_ID_ORIG 'S'
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define SG_DXFER_NONE (- 1)
+#define SG_DXFER_TO_DEV (- 2)
+#define SG_DXFER_FROM_DEV (- 3)
+#define SG_DXFER_TO_FROM_DEV (- 4)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define SG_DXFER_UNKNOWN (- 5)
+#define SG_FLAG_DIRECT_IO 1
+#define SG_FLAG_UNUSED_LUN_INHIBIT 2
+#define SG_FLAG_MMAP_IO 4
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define SG_FLAG_NO_DXFER 0x10000
+#define SG_FLAG_Q_AT_TAIL 0x10
+#define SG_FLAG_Q_AT_HEAD 0x20
+#define SG_INFO_OK_MASK 0x1
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define SG_INFO_OK 0x0
+#define SG_INFO_CHECK 0x1
+#define SG_INFO_DIRECT_IO_MASK 0x6
+#define SG_INFO_INDIRECT_IO 0x0
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define SG_INFO_DIRECT_IO 0x2
+#define SG_INFO_MIXED_IO 0x4
+typedef struct sg_scsi_id {
+  int host_no;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  int channel;
+  int scsi_id;
+  int lun;
+  int scsi_type;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  short h_cmd_per_lun;
+  short d_queue_depth;
+  int unused[2];
+} sg_scsi_id_t;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+typedef struct sg_req_info {
+  char req_state;
+  char orphan;
+  char sg_io_owned;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  char problem;
+  int pack_id;
+  void __user * usr_ptr;
+  unsigned int duration;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  int unused;
+} sg_req_info_t;
+#define SG_EMULATED_HOST 0x2203
+#define SG_SET_TRANSFORM 0x2204
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define SG_GET_TRANSFORM 0x2205
+#define SG_SET_RESERVED_SIZE 0x2275
+#define SG_GET_RESERVED_SIZE 0x2272
+#define SG_GET_SCSI_ID 0x2276
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define SG_SET_FORCE_LOW_DMA 0x2279
+#define SG_GET_LOW_DMA 0x227a
+#define SG_SET_FORCE_PACK_ID 0x227b
+#define SG_GET_PACK_ID 0x227c
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define SG_GET_NUM_WAITING 0x227d
+#define SG_GET_SG_TABLESIZE 0x227F
+#define SG_GET_VERSION_NUM 0x2282
+#define SG_SCSI_RESET 0x2284
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define SG_SCSI_RESET_NOTHING 0
+#define SG_SCSI_RESET_DEVICE 1
+#define SG_SCSI_RESET_BUS 2
+#define SG_SCSI_RESET_HOST 3
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define SG_SCSI_RESET_TARGET 4
+#define SG_SCSI_RESET_NO_ESCALATE 0x100
+#define SG_IO 0x2285
+#define SG_GET_REQUEST_TABLE 0x2286
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define SG_SET_KEEP_ORPHAN 0x2287
+#define SG_GET_KEEP_ORPHAN 0x2288
+#define SG_GET_ACCESS_COUNT 0x2289
+#define SG_SCATTER_SZ (8 * 4096)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define SG_DEFAULT_RETRIES 0
+#define SG_DEF_FORCE_LOW_DMA 0
+#define SG_DEF_FORCE_PACK_ID 0
+#define SG_DEF_KEEP_ORPHAN 0
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define SG_DEF_RESERVED_SIZE SG_SCATTER_SZ
+#define SG_MAX_QUEUE 16
+#define SG_BIG_BUFF SG_DEF_RESERVED_SIZE
+typedef struct sg_io_hdr Sg_io_hdr;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+typedef struct sg_io_vec Sg_io_vec;
+typedef struct sg_scsi_id Sg_scsi_id;
+typedef struct sg_req_info Sg_req_info;
+#define SG_MAX_SENSE 16
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+struct sg_header {
+  int pack_len;
+  int reply_len;
+  int pack_id;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  int result;
+  unsigned int twelve_byte : 1;
+  unsigned int target_status : 5;
+  unsigned int host_status : 8;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  unsigned int driver_status : 8;
+  unsigned int other_flags : 10;
+  unsigned char sense_buffer[SG_MAX_SENSE];
+};
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define SG_SET_TIMEOUT 0x2201
+#define SG_GET_TIMEOUT 0x2202
+#define SG_GET_COMMAND_Q 0x2270
+#define SG_SET_COMMAND_Q 0x2271
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define SG_SET_DEBUG 0x227e
+#define SG_NEXT_CMD_LEN 0x2283
+#define SG_DEFAULT_TIMEOUT (60 * HZ)
+#define SG_DEF_COMMAND_Q 0
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define SG_DEF_UNDERRUN_FLAG 0
+#endif