btrfs-progs: move btrfstune to own directory

Move the source file to own directory so it can be further split and
refactored. File needs to be renamed to main.c so the build magic works.

Signed-off-by: David Sterba <dsterba@suse.com>

Makefile

@@ -234,8 +234,9 @@ convert_objects = convert/main.o convert/common.o convert/source-fs.o \
 		  mkfs/common.o
 mkfs_objects = mkfs/main.o mkfs/common.o mkfs/rootdir.o
 image_objects = image/main.o image/sanitize.o
+tune_objects = tune/main.o
 all_objects = $(objects) $(cmds_objects) $(libbtrfs_objects) $(convert_objects) \
-	      $(mkfs_objects) $(image_objects) $(libbtrfsutil_objects)
+	      $(mkfs_objects) $(image_objects) $(tune_objects) $(libbtrfsutil_objects)
 
 udev_rules = 64-btrfs-dm.rules 64-btrfs-zoned.rules
 
@@ -301,11 +302,11 @@ 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
+		 tune/main.o
 
-progs_box_all_objects = $(mkfs_objects) $(image_objects) $(convert_objects)
+progs_box_all_objects = $(mkfs_objects) $(image_objects) $(convert_objects) $(tune_objects)
 progs_box_all_static_objects = $(static_mkfs_objects) $(static_image_objects) \
-			       $(static_convert_objects)
+			       $(static_convert_objects) $(static_tune_objects)
 
 progs_box_objects = $(filter-out %/main.o, $(progs_box_all_objects)) \
 		    $(patsubst %.o, %.box.o, $(progs_box_main))
@@ -379,6 +380,7 @@ static_libbtrfsutil_objects = $(patsubst %.o, %.static.o, $(libbtrfsutil_objects
 static_convert_objects = $(patsubst %.o, %.static.o, $(convert_objects))
 static_mkfs_objects = $(patsubst %.o, %.static.o, $(mkfs_objects))
 static_image_objects = $(patsubst %.o, %.static.o, $(image_objects))
+static_tune_objects = $(patsubst %.o, %.static.o, $(tune_objects))
 
 libs_shared = libbtrfs.so.0.1 libbtrfsutil.so.$(libbtrfsutil_version)
 lib_links = libbtrfs.so.0 libbtrfs.so libbtrfsutil.so.$(libbtrfsutil_major) libbtrfsutil.so
@@ -654,11 +656,11 @@ mkfs.btrfs.static: $(static_mkfs_objects) $(static_objects) $(static_libbtrfs_ob
 	@echo "    [LD]     $@"
 	$(Q)$(CC) -o $@ $^ $(STATIC_LDFLAGS) $(STATIC_LIBS)
 
-btrfstune: btrfstune.o $(objects) libbtrfsutil.a
+btrfstune: $(tune_objects) $(objects) libbtrfsutil.a
 	@echo "    [LD]     $@"
 	$(Q)$(CC) -o $@ $^ $(LDFLAGS) $(LIBS)
 
-btrfstune.static: btrfstune.static.o $(static_objects) $(static_libbtrfs_objects)
+btrfstune.static: $(static_tune_objects) $(static_objects) $(static_libbtrfs_objects)
 	@echo "    [LD]     $@"
 	$(Q)$(CC) -o $@ $^ $(STATIC_LDFLAGS) $(STATIC_LIBS)
 
@@ -783,21 +785,21 @@ tags: FORCE
 	@echo "    [TAGS]   $(TAGS_CMD)"
 	$(Q)$(TAGS_CMD) *.[ch] image/*.[ch] convert/*.[ch] mkfs/*.[ch] \
 		check/*.[ch] kernel-lib/*.[ch] kernel-shared/*.[ch] \
-		cmds/*.[ch] common/*.[ch] \
+		cmds/*.[ch] common/*.[ch] tune/*.[ch] \
 		libbtrfsutil/*.[ch]
 
 etags: FORCE
 	@echo "    [ETAGS]   $(ETAGS_CMD)"
 	$(Q)$(ETAGS_CMD) *.[ch] image/*.[ch] convert/*.[ch] mkfs/*.[ch] \
 		check/*.[ch] kernel-lib/*.[ch] kernel-shared/*.[ch] \
-		cmds/*.[ch] common/*.[ch] \
+		cmds/*.[ch] common/*.[ch] tune/*.[ch] \
 		libbtrfsutil/*.[ch]
 
 cscope: FORCE
 	@echo "    [CSCOPE] $(CSCOPE_CMD)"
 	$(Q)ls -1 *.[ch] image/*.[ch] convert/*.[ch] mkfs/*.[ch] check/*.[ch] \
 		kernel-lib/*.[ch] kernel-shared/*.[ch] libbtrfsutil/*.[ch] \
-		cmds/*.[ch] common/*.[ch] \
+		cmds/*.[ch] common/*.[ch] tune/*.[ch] \
 		> cscope.files
 	$(Q)$(CSCOPE_CMD)
 
@@ -813,6 +815,7 @@ clean: $(CLEANDIRS)
 		mkfs/*.o mkfs/.deps/*.o.d check/*.o check/.deps/*.o.d \
 		cmds/*.o cmds/.deps/*.o.d common/*.o common/.deps/*.o.d \
 		crypto/*.o crypto/.deps/*.o.d \
+		tune/*.o tune/.deps/*.o.d \
 		libbtrfs/*.o libbtrfs/.deps/*.o.d \
 	      ioctl-test quick-test library-test library-test-static \
               mktables btrfs.static mkfs.btrfs.static fssum \