From: Fan Chengniang <fancn.f...@cn.fujitsu.com> add a function to obtain quota status. Now it can only get whether quota is enabled. We can extend the function to get more quota status
Signed-off-by: Fan Chengniang <fancn.f...@cn.fujitsu.com> --- fs/btrfs/ioctl.c | 6 ++++++ fs/btrfs/qgroup.c | 14 ++++++++++++++ fs/btrfs/qgroup.h | 3 +++ include/uapi/linux/btrfs.h | 3 +++ 4 files changed, 26 insertions(+) diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 658d83d..f6e730b 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -4572,6 +4572,12 @@ static long btrfs_ioctl_quota_ctl(struct file *file, void __user *arg) case BTRFS_QUOTA_CTL_DISABLE: ret = btrfs_quota_disable(trans, root->fs_info); break; + case BTRFS_QUOTA_CTL_STATUS: + ret = btrfs_quota_status(trans, root->fs_info, sa); + if (!ret) + if (copy_to_user(arg, sa, sizeof(*sa))) + ret = -EFAULT; + break; default: ret = -EINVAL; break; diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c index 24c5bb1..b57fe45 100644 --- a/fs/btrfs/qgroup.c +++ b/fs/btrfs/qgroup.c @@ -993,6 +993,20 @@ out: return ret; } +int btrfs_quota_status(struct btrfs_trans_handle *trans, + struct btrfs_fs_info *fs_info, + struct btrfs_ioctl_quota_ctl_args *sa) +{ + int ret = 0; + + if (fs_info->quota_enabled) + sa->status |= BTRFS_QUOTA_STATUS_QUOTA_ENABLED; + else + sa->status &= ~BTRFS_QUOTA_STATUS_QUOTA_ENABLED; + + return ret; +} + static void qgroup_dirty(struct btrfs_fs_info *fs_info, struct btrfs_qgroup *qgroup) { diff --git a/fs/btrfs/qgroup.h b/fs/btrfs/qgroup.h index c5242aa..52d8b19 100644 --- a/fs/btrfs/qgroup.h +++ b/fs/btrfs/qgroup.h @@ -62,6 +62,9 @@ int btrfs_quota_enable(struct btrfs_trans_handle *trans, struct btrfs_fs_info *fs_info); int btrfs_quota_disable(struct btrfs_trans_handle *trans, struct btrfs_fs_info *fs_info); +int btrfs_quota_status(struct btrfs_trans_handle *trans, + struct btrfs_fs_info *fs_info, + struct btrfs_ioctl_quota_ctl_args *sa); int btrfs_qgroup_rescan(struct btrfs_fs_info *fs_info); void btrfs_qgroup_rescan_resume(struct btrfs_fs_info *fs_info); int btrfs_qgroup_wait_for_completion(struct btrfs_fs_info *fs_info); diff --git a/include/uapi/linux/btrfs.h b/include/uapi/linux/btrfs.h index 611e1c5..d4014e6 100644 --- a/include/uapi/linux/btrfs.h +++ b/include/uapi/linux/btrfs.h @@ -423,6 +423,9 @@ struct btrfs_ioctl_get_dev_stats { #define BTRFS_QUOTA_CTL_ENABLE 1 #define BTRFS_QUOTA_CTL_DISABLE 2 #define BTRFS_QUOTA_CTL_RESCAN__NOTUSED 3 +#define BTRFS_QUOTA_CTL_STATUS 4 + +#define BTRFS_QUOTA_STATUS_QUOTA_ENABLED 1 struct btrfs_ioctl_quota_ctl_args { __u64 cmd; __u64 status; -- 1.8.4.2 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html