+#define BTRFS_QUOTA_CTL_ENABLE 1
+#define BTRFS_QUOTA_CTL_DISABLE 2
+/* 3 has formerly been reserved for BTRFS_QUOTA_CTL_RESCAN */
+struct btrfs_ioctl_quota_ctl_args {
+ __u64 cmd;
+ __u64 status;
+};
+
+struct btrfs_ioctl_quota_rescan_args {
+ __u64 flags;
+ __u64 progress;
+ __u64 reserved[6];
+};
+
+struct btrfs_ioctl_qgroup_assign_args {
+ __u64 assign;
+ __u64 src;
+ __u64 dst;
+};
+
+struct btrfs_ioctl_qgroup_create_args {
+ __u64 create;
+ __u64 qgroupid;
+};
+
+/* Error codes as returned by the kernel */
+enum btrfs_err_code {
+ notused,
+ BTRFS_ERROR_DEV_RAID1_MIN_NOT_MET,
+ BTRFS_ERROR_DEV_RAID10_MIN_NOT_MET,
+ BTRFS_ERROR_DEV_RAID5_MIN_NOT_MET,
+ BTRFS_ERROR_DEV_RAID6_MIN_NOT_MET,
+ BTRFS_ERROR_DEV_TGT_REPLACE,
+ BTRFS_ERROR_DEV_MISSING_NOT_FOUND,
+ BTRFS_ERROR_DEV_ONLY_WRITABLE,
+ BTRFS_ERROR_DEV_EXCL_RUN_IN_PROGRESS
+};
+
+/* An error code to error string mapping for the kernel
+* error codes
+*/
+static inline char *btrfs_err_str(enum btrfs_err_code err_code)
+{
+ switch (err_code) {
+ case BTRFS_ERROR_DEV_RAID1_MIN_NOT_MET:
+ return "unable to go below two devices on raid1";
+ case BTRFS_ERROR_DEV_RAID10_MIN_NOT_MET:
+ return "unable to go below four devices on raid10";
+ case BTRFS_ERROR_DEV_RAID5_MIN_NOT_MET:
+ return "unable to go below two devices on raid5";
+ case BTRFS_ERROR_DEV_RAID6_MIN_NOT_MET:
+ return "unable to go below three devices on raid6";
+ case BTRFS_ERROR_DEV_TGT_REPLACE:
+ return "unable to remove the dev_replace target dev";
+ case BTRFS_ERROR_DEV_MISSING_NOT_FOUND:
+ return "no missing devices found to remove";
+ case BTRFS_ERROR_DEV_ONLY_WRITABLE:
+ return "unable to remove the only writeable device";
+ case BTRFS_ERROR_DEV_EXCL_RUN_IN_PROGRESS:
+ return "add/delete/balance/replace/resize operation "
+ "in progress";
+ default:
+ return NULL;
+ }
+}
+