diff --git a/Makefile b/Makefile
index 3ed445e7..82417d19 100644
--- a/Makefile
+++ b/Makefile
@@ -7,6 +7,11 @@
 #   clean       clean built binaries (not the documentation)
 #   clean-all   clean as above, clean docs and generated files
 #
+# All-in-one binary (busybox style):
+#   btrfs.box         single binary with functionality of mkfs.btrfs, btrfs-image,
+#                     btrfs-convert and btrfstune, selected by the file name
+#   btrfs.box.static  dtto, static version
+#
 # Tuning by variables (environment or make arguments):
 #   V=1            verbose, print command lines (default: quiet)
 #   C=1            run checker before compilation (default checker: sparse)
@@ -226,6 +231,19 @@ endif
 
 MAKEOPTS = --no-print-directory Q=$(Q)
 
+# built-in sources into "busybox", all files that contain the main function and
+# are not compiled standalone
+progs_box_main = btrfs.o mkfs/main.o image/main.o convert/main.o \
+		 btrfstune.o
+
+progs_box_all_objects = $(mkfs_objects) $(image_objects) $(convert_objects)
+progs_box_all_static_objects = $(static_mkfs_objects) $(static_image_objects) \
+			       $(static_convert_objects)
+
+progs_box_objects = $(filter-out %/main.o, $(progs_box_all_objects)) \
+		    $(patsubst %.o, %.box.o, $(progs_box_main))
+progs_box_static_objects = $(filter-out %/main.static.o, $(progs_box_all_static_objects)) \
+		    $(patsubst %.o, %.box.static.o, $(progs_box_main))
 
 # Programs to install.
 progs_install = btrfs mkfs.btrfs btrfs-map-logical btrfs-image \
@@ -337,6 +355,14 @@ endif
 	$(Q)$(CC) $(STATIC_CFLAGS) -c $< -o $@ $($(subst /,_,$(subst -,_,$(@:%.static.o=%)-cflags))) \
 		$($(subst -,_,btrfs-$(@:%/$(notdir $@)=%)-cflags))
 
+%.box.o: %.c
+	@echo "    [CC]     $@"
+	$(Q)$(CC) -DENABLE_BOX=1 $(CFLAGS) $(btrfs_convert_cflags) -c $< -o $@
+
+%.box.static.o: %.c
+	@echo "    [CC]     $@"
+	$(Q)$(CC) -DENABLE_BOX=1 $(STATIC_CFLAGS) $(btrfs_convert_cflags) -c $< -o $@
+
 all: $(progs_build) $(libs_build) $(BUILDDIRS)
 ifeq ($(PYTHON_BINDINGS),1)
 all: libbtrfsutil_python
@@ -489,6 +515,25 @@ btrfs.static: btrfs.static.o $(static_objects) $(static_cmds_objects) $(static_l
 	@echo "    [LD]     $@"
 	$(Q)$(CC) -o $@ $^ $(STATIC_LDFLAGS) $(STATIC_LIBS) $(STATIC_LIBS_COMP)
 
+btrfs.box: btrfs.box.o $(objects) $(cmds_objects) $(progs_box_objects) $(libs_static)
+	@echo "    [LD]     $@"
+	$(Q)$(CC) -o $@ $^ $(btrfs_convert_libs) $(LDFLAGS) $(LIBS) $(LIBS_COMP)
+
+btrfs.box.static: btrfs.box.static.o $(static_objects) $(static_cmds_objects) $(progs_box_static_objects) $(static_libbtrfs_objects) $(static_libbtrfsutil_objects)
+	@echo "    [LD]     $@"
+	$(Q)$(CC) $(STATIC_CFLAGS) -o $@ $^ $(btrfs_convert_libs) \
+		$(STATIC_LDFLAGS) $(STATIC_LIBS) $(STATIC_LIBS_COMP)
+
+box-links: btrfs.box
+	@echo "    [LN]     mkfs.btrfs"
+	$(Q)$(LN_S) -sf btrfs.box mkfs.btrfs
+	@echo "    [LN]     btrfs-image"
+	$(Q)$(LN_S) -sf btrfs.box btrfs-image
+	@echo "    [LN]     btrfs-convert"
+	$(Q)$(LN_S) -sf btrfs.box btrfs-convert
+	@echo "    [LN]     btrfstune"
+	$(Q)$(LN_S) -sf btrfs.box btrfstune
+
 # For backward compatibility, 'btrfs' changes behaviour to fsck if it's named 'btrfsck'
 btrfsck: btrfs
 	@echo "    [LN]     $@"
@@ -645,6 +690,7 @@ clean: $(CLEANDIRS)
 		cmds/*.o cmds/*.o.d common/*.o common/*.o.d \
 	      ioctl-test quick-test library-test library-test-static \
               mktables btrfs.static mkfs.btrfs.static fssum \
+	      btrfs.box btrfs.box.static \
 	      $(check_defs) \
 	      $(libs) $(lib_links) \
 	      $(progs_static) \
diff --git a/btrfs.c b/btrfs.c
index d2d5315a..6c8aabe2 100644
--- a/btrfs.c
+++ b/btrfs.c
@@ -24,6 +24,7 @@
 #include "cmds/commands.h"
 #include "common/utils.h"
 #include "common/help.h"
+#include "common/box.h"
 
 static const char * const btrfs_cmd_group_usage[] = {
 	"btrfs [--help] [--version] [--format <format>] <group> [<group>...] <command> [<args>]",
@@ -154,15 +155,33 @@ int handle_command_group(const struct cmd_struct *cmd, int argc,
 static const struct cmd_group btrfs_cmd_group;
 
 static const char * const cmd_help_usage[] = {
-	"btrfs help [--full]",
+	"btrfs help [--full] [--box]",
 	"Display help information",
 	"",
 	"--full     display detailed help on every command",
+	"--box      show list of built-in tools (busybox style)",
 	NULL
 };
 
 static int cmd_help(const struct cmd_struct *unused, int argc, char **argv)
 {
+	int i;
+
+	for (i = 0; i < argc; i++) {
+		if (strcmp(argv[i], "--box") == 0) {
+#if ENABLE_BOX
+			printf("Standalone tools built-in in the busybox style:\n");
+			printf("- mkfs.btrfs\n");
+			printf("- btrfs-image\n");
+			printf("- btrfs-convert\n");
+			printf("- btrfstune\n");
+			printf("- btrfs-find-root\n");
+#else
+			printf("No standalone tools built-in in the busybox style\n");
+#endif
+			exit(0);
+		}
+	}
 	help_command_group(&btrfs_cmd_group, argc, argv);
 	return 0;
 }
@@ -331,6 +350,16 @@ int main(int argc, char **argv)
 
 	if (!strcmp(bname, "btrfsck")) {
 		argv[0] = "check";
+#ifdef ENABLE_BOX
+	} else if (!strcmp(bname, "mkfs.btrfs")) {
+		return mkfs_main(argc, argv);
+	} else if (!strcmp(bname, "btrfs-image")) {
+		return image_main(argc, argv);
+	} else if (!strcmp(bname, "btrfs-convert")) {
+		return convert_main(argc, argv);
+	} else if (!strcmp(bname, "btrfstune")) {
+		return btrfstune_main(argc, argv);
+#endif
 	} else {
 		int shift;
 
diff --git a/btrfstune.c b/btrfstune.c
index ce028474..afa3aae3 100644
--- a/btrfstune.c
+++ b/btrfstune.c
@@ -33,6 +33,7 @@
 #include "common/utils.h"
 #include "volumes.h"
 #include "common/help.h"
+#include "common/box.h"
 
 static char *device;
 static int force = 0;
@@ -480,7 +481,7 @@ static void print_usage(void)
 	printf("\t--help      print this help\n");
 }
 
-int main(int argc, char *argv[])
+int BOX_MAIN(btrfstune)(int argc, char *argv[])
 {
 	struct btrfs_root *root;
 	unsigned ctree_flags = OPEN_CTREE_WRITES;
diff --git a/common/box.h b/common/box.h
new file mode 100644
index 00000000..f3fd312d
--- /dev/null
+++ b/common/box.h
@@ -0,0 +1,41 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License v2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 021110-1307, USA.
+ */
+
+#ifndef __BTRFS_BOX_H__
+#define __BTRFS_BOX_H__
+
+/*
+ * For tools that can co-exist in a single binary and their main() gets
+ * switched by the file name.
+ */
+#ifdef ENABLE_BOX
+#define BOX_MAIN(name)		name##_main
+#define DECLARE_BOX_MAIN(name)	int name##_main(int argc, char **argv)
+
+/*
+ * Declarations of the built-in tools, pairing with actual definitions of the
+ * respective main function
+ */
+DECLARE_BOX_MAIN(mkfs);
+DECLARE_BOX_MAIN(image);
+DECLARE_BOX_MAIN(convert);
+DECLARE_BOX_MAIN(btrfstune);
+
+#else
+#define BOX_MAIN(standalone)	main
+#endif
+
+#endif
diff --git a/common/help.c b/common/help.c
index b9d3dde1..189a1d35 100644
--- a/common/help.c
+++ b/common/help.c
@@ -473,6 +473,7 @@ void help_command_group(const struct cmd_group *grp, int argc, char **argv)
 	if (argc > 1) {
 		if (!strcmp(argv[1], "--full"))
 			full = 1;
+		/* The option --box is handled in the caller */
 	}
 
 	usage_command_group(grp, full, false);
diff --git a/convert/main.c b/convert/main.c
index 68c4eb61..9711874b 100644
--- a/convert/main.c
+++ b/convert/main.c
@@ -104,6 +104,7 @@
 #include "convert/source-fs.h"
 #include "kernel-lib/crc32c.h"
 #include "common/fsfeatures.h"
+#include "common/box.h"
 
 extern const struct btrfs_convert_operations ext2_convert_ops;
 extern const struct btrfs_convert_operations reiserfs_convert_ops;
@@ -1713,7 +1714,7 @@ static void print_usage(void)
 	printf("\treiserfs: %s\n", BTRFSCONVERT_REISERFS ? "yes" : "no");
 }
 
-int main(int argc, char *argv[])
+int BOX_MAIN(convert)(int argc, char *argv[])
 {
 	int ret;
 	int packing = 1;
diff --git a/image/main.c b/image/main.c
index 9c7adb9a..28ef1609 100644
--- a/image/main.c
+++ b/image/main.c
@@ -39,6 +39,7 @@
 #include "common/device-utils.h"
 #include "image/metadump.h"
 #include "image/sanitize.h"
+#include "common/box.h"
 
 #define MAX_WORKER_THREADS	(32)
 
@@ -2590,7 +2591,7 @@ static void print_usage(int ret)
 	exit(ret);
 }
 
-int main(int argc, char *argv[])
+int BOX_MAIN(image)(int argc, char *argv[])
 {
 	char *source;
 	char *target;
diff --git a/mkfs/main.c b/mkfs/main.c
index 383379e6..8dbec071 100644
--- a/mkfs/main.c
+++ b/mkfs/main.c
@@ -47,6 +47,7 @@
 #include "mkfs/rootdir.h"
 #include "kernel-lib/crc32c.h"
 #include "common/fsfeatures.h"
+#include "common/box.h"
 
 static int verbose = 1;
 
@@ -785,7 +786,7 @@ out:
 	return ret;
 }
 
-int main(int argc, char **argv)
+int BOX_MAIN(mkfs)(int argc, char **argv)
 {
 	char *file;
 	struct btrfs_root *root;
diff --git a/tests/build-tests.sh b/tests/build-tests.sh
index 15db42af..cb718a42 100755
--- a/tests/build-tests.sh
+++ b/tests/build-tests.sh
@@ -54,6 +54,9 @@ function build_make_targets() {
 	# defaults, static
 	target=static
 	buildme
+	# defaults, busybox
+	target='btrfs.box btrfs.box.static'
+	buildme
 	# defaults, 32bit
 	target="EXTRA_CFLAGS=-m32"
 	buildme