On 2018年03月03日 02:47, je...@suse.com wrote:
> From: Jeff Mahoney <je...@suse.com>
>
> 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 <je...@suse.com>
> ---
> 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");
This seems a little confusing.
If quota is disabled, we get ENOTTY not ENODATA.
For ENODATA we know quota is enabled but just no info for this qgroup.
Thanks,
Qu
> + 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);
>
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