btrfs-progs: move clear-cache.[ch] from check/ to common/ directory

The clear-cache functionality is shared by several commands:

- btrfs check
  For --clear-cache and --clear-ino-cache.

- btrfstune
  Mostly for block-group-tree feature conversion.

- btrfs-convert
  To enable the now default v2 space cache.

Thus it's no longer proper to keep clear-cache.[ch] under check/
directory, move them to common/ directory.

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

Makefile

@@ -242,7 +242,7 @@ cmds_objects = cmds/subvolume.o cmds/subvolume-list.o \
 	       cmds/inspect-dump-super.o cmds/inspect-tree-stats.o cmds/filesystem-du.o \
 	       cmds/reflink.o \
 	       mkfs/common.o check/mode-common.o check/mode-lowmem.o \
-	       check/clear-cache.o
+	       common/clear-cache.o
 
 libbtrfs_objects = \
 		kernel-lib/rbtree.o	\
@@ -262,12 +262,12 @@ libbtrfsutil_objects = libbtrfsutil/errors.o libbtrfsutil/filesystem.o \
 		       libbtrfsutil/stubs.o
 convert_objects = convert/main.o convert/common.o convert/source-fs.o \
 		  convert/source-ext2.o convert/source-reiserfs.o \
-		  mkfs/common.o check/clear-cache.o
+		  mkfs/common.o common/clear-cache.o
 mkfs_objects = mkfs/main.o mkfs/common.o mkfs/rootdir.o
 image_objects = image/main.o image/sanitize.o image/image-create.o image/common.o \
 		image/image-restore.o
 tune_objects = tune/main.o tune/seeding.o tune/change-uuid.o tune/change-metadata-uuid.o \
-	       tune/convert-bgt.o tune/change-csum.o check/clear-cache.o tune/quota.o
+	       tune/convert-bgt.o tune/change-csum.o common/clear-cache.o tune/quota.o
 all_objects = $(objects) $(cmds_objects) $(libbtrfs_objects) $(convert_objects) \
 	      $(mkfs_objects) $(image_objects) $(tune_objects) $(libbtrfsutil_objects)
 

check/main.c

@@ -58,6 +58,7 @@
 #include "common/help.h"
 #include "common/open-utils.h"
 #include "common/string-utils.h"
+#include "common/clear-cache.h"
 #include "cmds/commands.h"
 #include "mkfs/common.h"
 #include "check/common.h"
@@ -66,7 +67,6 @@
 #include "check/mode-original.h"
 #include "check/mode-lowmem.h"
 #include "check/qgroup-verify.h"
-#include "check/clear-cache.h"
 
 /* Global context variables */
 struct btrfs_fs_info *gfs_info;

common/clear-cache.c

@@ -33,7 +33,7 @@
 #include "common/messages.h"
 #include "check/repair.h"
 #include "check/mode-common.h"
-#include "check/clear-cache.h"
+#include "common/clear-cache.h"
 
 /*
  * Number of free space cache inodes to delete in one transaction.

convert/main.c

@@ -119,9 +119,9 @@
 #include "common/box.h"
 #include "common/open-utils.h"
 #include "common/extent-tree-utils.h"
+#include "common/clear-cache.h"
 #include "cmds/commands.h"
 #include "check/repair.h"
-#include "check/clear-cache.h"
 #include "mkfs/common.h"
 #include "convert/common.h"
 #include "convert/source-fs.h"

tune/main.c

@@ -37,9 +37,9 @@
 #include "common/string-utils.h"
 #include "common/help.h"
 #include "common/box.h"
+#include "common/clear-cache.h"
 #include "cmds/commands.h"
 #include "tune/tune.h"
-#include "check/clear-cache.h"
 
 static char *device;
 static int force = 0;