From: Jeff Mahoney <jeffm@xxxxxxxx>
This patch reports on the first-level qgroup, if any, associated with
a particular subvolume. It displays the usage and limit, subject
to the usual unit parameters.
Signed-off-by: Jeff Mahoney <jeffm@xxxxxxxx>
---
cmds-subvolume.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 46 insertions(+)
diff --git a/cmds-subvolume.c b/cmds-subvolume.c
index 8a473f7a..29d0e0e5 100644
--- a/cmds-subvolume.c
+++ b/cmds-subvolume.c
@@ -972,6 +972,7 @@ static const char * const cmd_subvol_show_usage[] = {
"Show more information about the subvolume",
"-r|--rootid rootid of the subvolume",
"-u|--uuid uuid of the subvolume",
+ HELPINFO_UNITS_SHORT_LONG,
"",
"If no option is specified, <subvol-path> will be shown, otherwise",
"the rootid or uuid are resolved relative to the <mnt> path.",
@@ -993,6 +994,13 @@ static int cmd_subvol_show(int argc, char **argv)
int by_uuid = 0;
u64 rootid_arg;
u8 uuid_arg[BTRFS_UUID_SIZE];
+ struct btrfs_qgroup_stats stats;
+ unsigned int unit_mode;
+ const char *referenced_size;
+ const char *referenced_limit_size = "-";
+ unsigned field_width = 0;
+
+ unit_mode = get_unit_mode_from_arg(&argc, argv, 1);
while (1) {
int c;
@@ -1112,6 +1120,44 @@ static int cmd_subvol_show(int argc, char **argv)
btrfs_list_subvols_print(fd, filter_set, NULL, BTRFS_LIST_LAYOUT_RAW,
1, raw_prefix);
+ ret = btrfs_qgroup_query(fd, get_ri.root_id, &stats);
+ if (ret < 0) {
+ if (ret == -ENODATA)
+ printf("Quotas must be enabled for per-subvolume usage\n");
+ else if (ret != -ENOTTY)
+ fprintf(stderr,
+ "\nERROR: BTRFS_IOC_QUOTA_QUERY failed: %s\n",
+ strerror(errno));
+ goto out;
+ }
+
+ printf("\tQuota Usage:\t\t");
+ fflush(stdout);
+
+ referenced_size = pretty_size_mode(stats.info.referenced, unit_mode);
+ if (stats.limit.max_referenced)
+ referenced_limit_size = pretty_size_mode(
+ stats.limit.max_referenced,
+ unit_mode);
+ field_width = max(strlen(referenced_size),
+ strlen(referenced_limit_size));
+
+ printf("%-*s referenced, %s exclusive\n ", field_width,
+ referenced_size,
+ pretty_size_mode(stats.info.exclusive, unit_mode));
+
+ printf("\tQuota Limits:\t\t");
+ if (stats.limit.max_referenced || stats.limit.max_exclusive) {
+ const char *excl = "-";
+
+ if (stats.limit.max_exclusive)
+ excl = pretty_size_mode(stats.limit.max_exclusive,
+ unit_mode);
+ printf("%-*s referenced, %s exclusive\n", field_width,
+ referenced_limit_size, excl);
+ } else
+ printf("None\n");
+
out:
/* clean up */
free(get_ri.path);
--
2.15.1
--
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