[PATCH 4/9] Btrfs-progs: introduce '-l' option to print max referenced size of qgroups

[Miao Xie]

From: Wang Shilong <wangsl-f...@cn.fujitsu.com>

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

                btrfs qgroup show -l <path>

Signed-off-by: Wang Shilong <wangsl-f...@cn.fujitsu.com>
Signed-off-by: Miao Xie <mi...@cn.fujitsu.com>
---
 cmds-qgroup.c | 9 +++++++--
 qgroup.c      | 7 +++++++
 qgroup.h      | 1 +
 3 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/cmds-qgroup.c b/cmds-qgroup.c
index f182c90..a0156a6 100644
--- a/cmds-qgroup.c
+++ b/cmds-qgroup.c
@@ -199,10 +199,11 @@ 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 -pcl <path>",
        "Show all subvolume quota groups.",
        "-p             print parent qgroup id",
        "-c             print child qgroup id",
+       "-l             print max referenced size of qgroup",
        NULL
 };
 
@@ -215,7 +216,7 @@ static int cmd_qgroup_show(int argc, char **argv)
 
        optind = 1;
        while (1) {
-               c = getopt(argc, argv, "pc");
+               c = getopt(argc, argv, "pcl");
                if (c < 0)
                        break;
 
@@ -228,6 +229,10 @@ static int cmd_qgroup_show(int argc, char **argv)
                        btrfs_qgroup_setup_print_column(
                                                BTRFS_QGROUP_CHILD);
                        break;
+               case 'l':
+                       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 3bfc408..31f3a16 100644
--- 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",
@@ -163,6 +167,9 @@ static void print_qgroup_column(struct btrfs_qgroup *qgroup,
        case BTRFS_QGROUP_EXCL:
                printf("%llu", qgroup->excl);
                break;
+       case BTRFS_QGROUP_MAX_RFER:
+               printf("%llu", qgroup->max_rfer);
+               break;
        case BTRFS_QGROUP_PARENT:
                print_parent_column(qgroup);
                break;
diff --git a/qgroup.h b/qgroup.h
index 02c78be..a212913 100644
--- 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,
-- 
1.7.11.7

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