diff --git a/libc/include/sys/mount.h b/libc/include/sys/mount.h
new file mode 100644
index 0000000..62c4ee2
--- /dev/null
+++ b/libc/include/sys/mount.h
@@ -0,0 +1,99 @@
+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+#ifndef _SYS_MOUNT_H
+#define _SYS_MOUNT_H
+
+#include <sys/cdefs.h>
+#include <sys/ioctl.h>
+
+__BEGIN_DECLS
+
+/*
+ * These are the fs-independent mount-flags: up to 32 flags are supported
+ */
+#define MS_RDONLY        1      /* Mount read-only */
+#define MS_NOSUID        2      /* Ignore suid and sgid bits */
+#define MS_NODEV         4      /* Disallow access to device special files */
+#define MS_NOEXEC        8      /* Disallow program execution */
+#define MS_SYNCHRONOUS  16      /* Writes are synced at once */
+#define MS_REMOUNT      32      /* Alter flags of a mounted FS */
+#define MS_MANDLOCK     64      /* Allow mandatory locks on an FS */
+#define MS_DIRSYNC      128     /* Directory modifications are synchronous */
+#define MS_NOATIME      1024    /* Do not update access times. */
+#define MS_NODIRATIME   2048    /* Do not update directory access times */
+#define MS_BIND         4096
+#define MS_MOVE         8192
+#define MS_REC          16384
+#define MS_VERBOSE      32768
+#define MS_POSIXACL     (1<<16) /* VFS does not apply the umask */
+#define MS_ONE_SECOND   (1<<17) /* fs has 1 sec a/m/ctime resolution */
+#define MS_ACTIVE       (1<<30)
+#define MS_NOUSER       (1<<31)
+
+/*
+ * Superblock flags that can be altered by MS_REMOUNT
+ */
+#define MS_RMT_MASK     (MS_RDONLY|MS_SYNCHRONOUS|MS_MANDLOCK|MS_NOATIME|MS_NODIRATIME)
+
+/*
+ * Old magic mount flag and mask
+ */
+#define MS_MGC_VAL 0xC0ED0000
+#define MS_MGC_MSK 0xffff0000
+
+/*
+ * umount2() flags
+ */
+#define MNT_FORCE	1	/* Forcibly unmount */
+#define MNT_DETACH	2	/* Detach from tree only */
+#define MNT_EXPIRE	4	/* Mark for expiry */
+
+/*
+ * Block device ioctls
+ */
+#define BLKROSET   _IO(0x12, 93) /* Set device read-only (0 = read-write).  */
+#define BLKROGET   _IO(0x12, 94) /* Get read-only status (0 = read_write).  */
+#define BLKRRPART  _IO(0x12, 95) /* Re-read partition table.  */
+#define BLKGETSIZE _IO(0x12, 96) /* Return device size.  */
+#define BLKFLSBUF  _IO(0x12, 97) /* Flush buffer cache.  */
+#define BLKRASET   _IO(0x12, 98) /* Set read ahead for block device.  */
+#define BLKRAGET   _IO(0x12, 99) /* Get current read ahead setting.  */
+
+/*
+ * Prototypes
+ */
+extern int mount(const char *, const char *,
+		   const char *, unsigned long,
+		   const void *);
+extern int umount(const char *);
+extern int umount2(const char *, int);
+extern int pivot_root(const char *, const char *);
+
+__END_DECLS
+
+#endif /* _SYS_MOUNT_H */