diff --git a/loop.c b/loop.c
new file mode 100644
index 0000000..a350135
--- /dev/null
+++ b/loop.c
@@ -0,0 +1,187 @@
+/*
+ * Copyright (c) 2012 The Chromium OS Authors.
+ * Written by Mike Frysinger <vapier@gentoo.org>.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
+ */
+
+#include "defs.h"
+
+#include <sys/ioctl.h>
+
+#include <linux/loop.h>
+
+static const struct xlat loop_flags_options[] = {
+	{ LO_FLAGS_READ_ONLY,	"LO_FLAGS_READ_ONLY"	},
+	{ LO_FLAGS_AUTOCLEAR,	"LO_FLAGS_AUTOCLEAR"	},
+#ifdef LO_FLAGS_PARTSCAN
+	{ LO_FLAGS_PARTSCAN,	"LO_FLAGS_PARTSCAN"	},
+#endif
+	{ 0,			NULL			},
+};
+
+static const struct xlat loop_crypt_type_options[] = {
+	{ LO_CRYPT_NONE,	"LO_CRYPT_NONE"		},
+	{ LO_CRYPT_XOR,		"LO_CRYPT_XOR"		},
+	{ LO_CRYPT_DES,		"LO_CRYPT_DES"		},
+	{ LO_CRYPT_FISH2,	"LO_CRYPT_FISH2"	},
+	{ LO_CRYPT_BLOW,	"LO_CRYPT_BLOW"		},
+	{ LO_CRYPT_CAST128,	"LO_CRYPT_CAST128"	},
+	{ LO_CRYPT_IDEA,	"LO_CRYPT_IDEA"		},
+	{ LO_CRYPT_DUMMY,	"LO_CRYPT_DUMMY"	},
+	{ LO_CRYPT_SKIPJACK,	"LO_CRYPT_SKIPJACK"	},
+	{ LO_CRYPT_CRYPTOAPI,	"LO_CRYPT_CRYPTOAPI"	},
+	{ 0,			NULL			},
+};
+
+int loop_ioctl(struct tcb *tcp, long code, long arg)
+{
+	struct loop_info info;
+	struct loop_info64 info64;
+	char *s = alloca((LO_NAME_SIZE + LO_KEY_SIZE) * 4);
+
+	if (entering(tcp))
+		return 0;
+
+	switch (code) {
+
+	case LOOP_SET_STATUS:
+	case LOOP_GET_STATUS:
+		if (!verbose(tcp) || umove(tcp, arg, &info) < 0)
+			return 0;
+
+		tprintf(", {number=%i", info.lo_number);
+
+		if (!abbrev(tcp)) {
+			tprintf(", device=%#lx, inode=%lu, rdevice=%#lx",
+				(unsigned long) info.lo_device,
+				info.lo_inode,
+				(unsigned long) info.lo_rdevice);
+		}
+
+		tprintf(", offset=%#x", info.lo_offset);
+
+		if (!abbrev(tcp) || info.lo_encrypt_type != LO_CRYPT_NONE) {
+			tprints(", encrypt_type=");
+			printxval(loop_crypt_type_options, info.lo_encrypt_type,
+				"LO_CRYPT_???");
+			tprintf(", encrypt_key_size=%i", info.lo_encrypt_key_size);
+		}
+
+		tprints(", flags=");
+		printflags(loop_flags_options, info.lo_flags, "LO_FLAGS_???");
+
+		string_quote(info.lo_name, s, -1, LO_NAME_SIZE);
+		tprintf(", name=%s", s);
+
+		if (!abbrev(tcp) || info.lo_encrypt_type != LO_CRYPT_NONE) {
+			string_quote((void *) info.lo_encrypt_key, s, 0, LO_KEY_SIZE);
+			tprintf(", encrypt_key=%s", s);
+		}
+
+		if (!abbrev(tcp))
+			tprintf(", init={%#lx, %#lx}"
+				", reserved={%#x, %#x, %#x, %#x}}",
+				info.lo_init[0], info.lo_init[1],
+				info.reserved[0], info.reserved[1],
+				info.reserved[2], info.reserved[3]);
+		else
+			tprints(", ...}");
+
+		return 1;
+
+	case LOOP_SET_STATUS64:
+	case LOOP_GET_STATUS64:
+		if (!verbose(tcp) || umove(tcp, arg, &info64) < 0)
+			return 0;
+
+		tprints(", {");
+
+		if (!abbrev(tcp)) {
+			tprintf("device=%" PRIu64 ", inode=%" PRIu64 ", "
+				"rdevice=%" PRIu64 ", offset=%#" PRIx64 ", "
+				"sizelimit=%" PRIu64 ", number=%" PRIu32,
+				(uint64_t) info64.lo_device,
+				(uint64_t) info64.lo_inode,
+				(uint64_t) info64.lo_rdevice,
+				(uint64_t) info64.lo_offset,
+				(uint64_t) info64.lo_sizelimit,
+				(uint32_t) info64.lo_number);
+		} else {
+			tprintf("offset=%#" PRIx64 ", number=%" PRIu32,
+				(uint64_t) info64.lo_offset,
+				(uint32_t) info64.lo_number);
+		}
+
+		if (!abbrev(tcp) || info64.lo_encrypt_type != LO_CRYPT_NONE) {
+			tprints(", encrypt_type=");
+			printxval(loop_crypt_type_options, info64.lo_encrypt_type,
+				"LO_CRYPT_???");
+			tprintf(", encrypt_key_size=%" PRIu32,
+				info64.lo_encrypt_key_size);
+		}
+
+		tprints(", flags=");
+		printflags(loop_flags_options, info64.lo_flags, "LO_FLAGS_???");
+
+		string_quote((void *) info64.lo_file_name, s, -1, LO_NAME_SIZE);
+		tprintf(", file_name=%s", s);
+
+		if (!abbrev(tcp) || info64.lo_encrypt_type != LO_CRYPT_NONE) {
+			string_quote((void *) info64.lo_crypt_name, s, -1, LO_NAME_SIZE);
+			tprintf(", crypt_name=%s", s);
+			string_quote((void *) info64.lo_encrypt_key, s, 0, LO_KEY_SIZE);
+			tprintf(", encrypt_key=%s", s);
+		}
+
+		if (!abbrev(tcp))
+			tprintf(", init={%#" PRIx64 ", %#" PRIx64 "}}",
+				(uint64_t) info64.lo_init[0],
+				(uint64_t) info64.lo_init[1]);
+		else
+			tprints(", ...}");
+
+		return 1;
+
+	case LOOP_CLR_FD:
+	case LOOP_SET_CAPACITY:
+#ifdef LOOP_CTL_GET_FREE
+	/* newer loop-control stuff */
+	case LOOP_CTL_GET_FREE:
+#endif
+		/* Takes no arguments */
+		return 1;
+
+	case LOOP_SET_FD:
+	case LOOP_CHANGE_FD:
+#ifdef LOOP_CTL_ADD
+	/* newer loop-control stuff */
+	case LOOP_CTL_ADD:
+	case LOOP_CTL_REMOVE:
+#endif
+		/* These take simple args, so let default printer handle it */
+
+	default:
+		return 0;
+	}
+}