btrfs-progs: move btrfs_extref_hash() to hash.h

[platform/upstream/btrfs-progs.git] / cmds-fi-du.c

diff --git a/cmds-fi-du.c b/cmds-fi-du.c
index a5b66e6..895c242 100644 (file)
--- a/cmds-fi-du.c
+++ b/cmds-fi-du.c
@@ -27,8 +27,13 @@
 
 #include <sys/ioctl.h>
 #include <linux/fs.h>
+#include <linux/version.h>
 #include <linux/fiemap.h>
 
+#if !defined(FIEMAP_EXTENT_SHARED) && (HAVE_OWN_FIEMAP_EXTENT_SHARED_DEFINE == 1)
+#define FIEMAP_EXTENT_SHARED           0x00002000
+#endif
+
 #include "utils.h"
 #include "commands.h"
 #include "kerncompat.h"
@@ -546,6 +551,7 @@ int cmd_filesystem_du(int argc, char **argv)
 {
        int ret = 0, err = 0;
        int i;
+       u32 kernel_version;
 
        unit_mode = get_unit_mode_from_arg(&argc, argv, 1);
 
@@ -570,6 +576,14 @@ int cmd_filesystem_du(int argc, char **argv)
        if (check_argc_min(argc - optind, 1))
                usage(cmd_filesystem_du_usage);
 
+       kernel_version = get_running_kernel_version();
+
+       if (kernel_version < KERNEL_VERSION(2,6,33)) {
+               warning(
+"old kernel version detected, shared space will be reported as exclusive\n"
+"due to missing support for FIEMAP_EXTENT_SHARED flag");
+       }
+
        printf("%10s  %10s  %10s  %s\n", "Total", "Exclusive", "Set shared",
                        "Filename");