From: Wang Shilong <wangsl-f...@cn.fujitsu.com>
This patch introduces '-p' option to print the ID of the parent qgroups.
You may use it like:
btrfs qgroup show -p <path>
For Example:
qgroupid(2/0)
/ \
/ \
/ \
qgroupid(1/0) qgroupid(1/1)
\ /
\ /
qgroupid(0/1)
If we use the command:
btrfs qgroup show -p <path>
The result will output
0/1 -- -- 1/0,1/1
1/0 -- -- 2/0
1/1 -- -- 2/0
2/0 -- -- --
Signed-off-by: Wang Shilong <wangsl-f...@cn.fujitsu.com>
Signed-off-by: Miao Xie <mi...@cn.fujitsu.com>
---
cmds-qgroup.c | 24 +++++++++++++++++++++---
qgroup.c | 22 ++++++++++++++++++++++
qgroup.h | 1 +
3 files changed, 44 insertions(+), 3 deletions(-)
diff --git a/cmds-qgroup.c b/cmds-qgroup.c
index 2d5b59b..f402587 100644
--- a/cmds-qgroup.c
+++ b/cmds-qgroup.c
@@ -199,20 +199,38 @@ static int cmd_qgroup_destroy(int argc, char **argv)
}
static const char * const cmd_qgroup_show_usage[] = {
- "btrfs qgroup show <path>",
+ "btrfs qgroup show -p <path>",
"Show all subvolume quota groups.",
+ "-p print parent qgroup id",
NULL
};
static int cmd_qgroup_show(int argc, char **argv)
{
int ret = 0;
+ char *path;
int fd;
- char *path = argv[1];
+ int c;
+
+ optind = 1;
+ while (1) {
+ c = getopt(argc, argv, "p");
+ if (c < 0)
+ break;
- if (check_argc_exact(argc, 2))
+ switch (c) {
+ case 'p':
+ btrfs_qgroup_setup_print_column(
+ BTRFS_QGROUP_PARENT);
+ break;
+ default:
+ usage(cmd_qgroup_show_usage);
+ }
+ }
+ if (check_argc_exact(argc - optind, 1))
usage(cmd_qgroup_show_usage);
+ path = argv[optind];
fd = open_file_or_dir(path);
if (fd < 0) {
fprintf(stderr, "ERROR: can't access '%s'\n", path);
diff --git a/qgroup.c b/qgroup.c
index 097811e..ebe7d17 100644
--- a/qgroup.c
+++ b/qgroup.c
@@ -88,6 +88,11 @@ struct {
.need_print = 1,
},
{
+ .name = "parent",
+ .column_name = "Parent",
+ .need_print = 0,
+ },
+ {
.name = NULL,
.column_name = NULL,
.need_print = 0,
@@ -108,6 +113,20 @@ void btrfs_qgroup_setup_print_column(enum
btrfs_qgroup_column_enum column)
btrfs_qgroup_columns[i].need_print = 1;
}
+static void print_parent_column(struct btrfs_qgroup *qgroup)
+{
+ struct btrfs_qgroup_list *list = NULL;
+
+ list_for_each_entry(list, &qgroup->qgroups, next_qgroup) {
+ printf("%llu/%llu", (list->qgroup)->qgroupid >> 48,
+ ((1ll << 48) - 1) & (list->qgroup)->qgroupid);
+ if (!list_is_last(&list->next_qgroup, &qgroup->qgroups))
+ printf(",");
+ }
+ if (list_empty(&qgroup->qgroups))
+ printf("---");
+}
+
static void print_qgroup_column(struct btrfs_qgroup *qgroup,
enum btrfs_qgroup_column_enum column)
{
@@ -125,6 +144,9 @@ static void print_qgroup_column(struct btrfs_qgroup *qgroup,
case BTRFS_QGROUP_EXCL:
printf("%llu", qgroup->excl);
break;
+ case BTRFS_QGROUP_PARENT:
+ print_parent_column(qgroup);
+ break;
default:
break;
}
diff --git a/qgroup.h b/qgroup.h
index 138c48c..e1de675 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_PARENT,
BTRFS_QGROUP_ALL,
};
--
1.7.11.7
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