diff --git a/src/lib.rs b/src/lib.rs
index 36d4498..4c1374a 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -22,7 +22,7 @@ use time::Timespec;
 pub use kernel::FUSE_ROOT_ID;
 pub use kernel::consts;
 pub use reply::{Reply, ReplyEmpty, ReplyData, ReplyEntry, ReplyAttr, ReplyOpen};
-pub use reply::{ReplyWrite, ReplyStatfs, ReplyCreate, ReplyLock, ReplyBmap, ReplyDirectory};
+pub use reply::{ReplyWrite, ReplyStatfs, ReplyCreate, ReplyLock, ReplyBmap, ReplyDirectory, ReplyIoctl};
 pub use reply::ReplyXattr;
 #[cfg(target_os = "macos")]
 pub use reply::ReplyXTimes;
@@ -349,6 +349,16 @@ pub trait Filesystem {
         reply.error(ENOSYS);
     }
 
+    /// control device
+    fn ioctl(&mut self, _req: &Request, _ino: u64, _fh: u64, _flags: u32, _cmd: u32, _arg: u64, _in_size: u32, _out_size: u32, _blocksize: u32, _idx: u64, reply: ReplyIoctl) {
+        reply.error(ENOSYS);
+    }
+
+    /// Preallocate or deallocate space to a file
+    fn fallocate(&mut self, _req: &Request, _ino: u64, _fh: u64, _offset: i64, _length: i64, _mode: i32, reply: ReplyEmpty) {
+        reply.error(ENOSYS);
+    }
+
     /// macOS only: Rename the volume. Set fuse_init_out.flags during init to
     /// FUSE_VOL_RENAME to enable
     #[cfg(target_os = "macos")]
diff --git a/src/reply.rs b/src/reply.rs
index 78eacd4..d30c2c2 100644
--- a/src/reply.rs
+++ b/src/reply.rs
@@ -528,6 +528,28 @@ impl ReplyBmap {
     }
 }
 
+pub struct ReplyIoctl {
+    reply: ReplyRaw<()>,
+}
+
+impl Reply for ReplyIoctl {
+    fn new<S: ReplySender>(unique: u64, sender: S) -> ReplyIoctl {
+        ReplyIoctl { reply: Reply::new(unique, sender) }
+    }
+}
+
+impl ReplyIoctl {
+    //// Reply to a request with the iovec
+    //pub fn iovec(mut self, data: &[u8]) {
+    //    self.reply.send(0, &[data]);
+    //}
+
+    /// Reply to a request with the given error code
+    pub fn error(self, err: c_int) {
+        self.reply.error(err);
+    }
+}
+
 ///
 /// Directory reply
 ///
diff --git a/src/request.rs b/src/request.rs
index 11c519a..1453992 100644
--- a/src/request.rs
+++ b/src/request.rs
@@ -385,19 +385,29 @@ impl<'a> Request<'a> {
                 se.filesystem.bmap(self, self.header.nodeid, arg.blocksize, arg.block, self.reply());
             },
             FUSE_IOCTL => {
-                unimplemented!()
+                let arg: &fuse_ioctl_in = data.fetch();
+                self.reply::<ReplyEmpty>().error(ENOSYS);
+                //debug!("IOCTL({}) ino {:#018x}, fh {}, flags {}, cmd {}, in_size {}, out_size {}", self.header.unique, self.header.nodeid, arg.fh, arg.flags, arg.cmd, arg.in_size, arg.out_size);
+                //se.filesystem.ioctl(self, self.header.nodeid, arg.fh, arg.flags, arg.cmd, arg.in_size, arg.out_size, self.reply());
             },
             FUSE_POLL => {
-                unimplemented!()
+                let arg: &fuse_poll_in = data.fetch();
+                //debug!("IOCTL({}) ino {:#018x}, fh {}, flags {}, in_size {}, out_size {}", self.header.unique, self.header.nodeid, arg.fh, arg.in_size, arg.out_size);
+                //se.filesystem.poll(self, self.header.nodeid, arg.fh, arg.flags, arg.in_size, arg.out_size, self.reply());
+                self.reply::<ReplyEmpty>().error(ENOSYS);
             },
             FUSE_NOTIFY_REPLY => {
-                unimplemented!()
+                let arg: &fuse_notify_retrieve_in = data.fetch();
+                self.reply::<ReplyEmpty>().error(ENOSYS);
             },
             FUSE_BATCH_FORGET => {
-                unimplemented!()
+                let arg: &fuse_batch_forget_in = data.fetch();
+                self.reply::<ReplyEmpty>().error(ENOSYS);
             },
             FUSE_FALLOCATE => {
-                unimplemented!()
+                let arg: &fuse_fallocate_in = data.fetch();
+                debug!("FALLOCATE({}) ino {:#018x}, fh {}, offset {}, length {}, mode {}", self.header.unique, self.header.nodeid, arg.fh, arg.offset, arg.length, arg.mode);
+                se.filesystem.fallocate(self, self.header.nodeid, arg.fh, arg.offset, arg.length, arg.mode, self.reply());
             },
             #[cfg(target_os = "macos")]
             FUSE_SETVOLNAME => {
@@ -419,7 +429,8 @@ impl<'a> Request<'a> {
                 se.filesystem.getxtimes(self, self.header.nodeid, self.reply());
             },
             CUSE_INIT => {
-                unimplemented!()
+                let arg: &cuse_init_in = data.fetch();
+                self.reply::<ReplyEmpty>().error(ENOSYS);
             },
         }
     }