Btrfs-progs: introduce '-r' option to print max referenced size of qgroups

This patch introduces '-r' option to print max referenced size of qgroups.
You may use it like:

		btrfs qgroup show -r <path>

Signed-off-by: Wang Shilong <wangsl-fnst@cn.fujitsu.com>
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>

diff --git a/cmds-qgroup.c b/cmds-qgroup.c
index 147bedc..213cbde 100644 (file)
--- a/cmds-qgroup.c
+++ b/cmds-qgroup.c
@@ -202,10 +202,11 @@ static int cmd_qgroup_destroy(int argc, char **argv)
 }
 
 static const char * const cmd_qgroup_show_usage[] = {
-       "btrfs qgroup show -pc <path>",
+       "btrfs qgroup show -pcr <path>",
        "Show all subvolume quota groups.",
        "-p             print parent qgroup id",
        "-c             print child qgroup id",
+       "-r             print max referenced size of qgroup",
        NULL
 };
 
@@ -220,7 +221,7 @@ static int cmd_qgroup_show(int argc, char **argv)
 
        optind = 1;
        while (1) {
-               c = getopt(argc, argv, "pc");
+               c = getopt(argc, argv, "pcr");
                if (c < 0)
                        break;
                switch (c) {
@@ -232,6 +233,10 @@ static int cmd_qgroup_show(int argc, char **argv)
                        btrfs_qgroup_setup_print_column(
                                BTRFS_QGROUP_CHILD);
                        break;
+               case 'r':
+                       btrfs_qgroup_setup_print_column(
+                               BTRFS_QGROUP_MAX_RFER);
+                       break;
                default:
                        usage(cmd_qgroup_show_usage);
                }

diff --git a/qgroup.c b/qgroup.c
index 1592dd4..f9eb52d 100644 (file)
--- a/qgroup.c
+++ b/qgroup.c
@@ -87,6 +87,10 @@ struct {
                .column_name    = "Excl",
                .need_print     = 1,
        },
+       {       .name           = "max_rfer",
+               .column_name    = "Max_rfer",
+               .need_print     = 0,
+       },
        {
                .name           = "parent",
                .column_name    = "Parent",
@@ -166,6 +170,9 @@ static void print_qgroup_column(struct btrfs_qgroup *qgroup,
        case BTRFS_QGROUP_PARENT:
                print_parent_column(qgroup);
                break;
+       case BTRFS_QGROUP_MAX_RFER:
+               printf("%llu", qgroup->max_rfer);
+               break;
        case BTRFS_QGROUP_CHILD:
                print_child_column(qgroup);
                break;

diff --git a/qgroup.h b/qgroup.h
index 33682ae..168fac0 100644 (file)
--- a/qgroup.h
+++ b/qgroup.h
@@ -26,6 +26,7 @@ enum btrfs_qgroup_column_enum {
        BTRFS_QGROUP_QGROUPID,
        BTRFS_QGROUP_RFER,
        BTRFS_QGROUP_EXCL,
+       BTRFS_QGROUP_MAX_RFER,
        BTRFS_QGROUP_PARENT,
        BTRFS_QGROUP_CHILD,
        BTRFS_QGROUP_ALL,