1 files changed, 19 insertions, 0 deletions

diff --git a/fs/btrfs/ioctl.h b/fs/btrfs/ioctl.h
index 086e6bdae1c4..5bf05e28b829 100644
--- a/fs/btrfs/ioctl.h
+++ b/fs/btrfs/ioctl.h
@@ -266,6 +266,25 @@ struct btrfs_ioctl_logical_ino_args {
         __u64                           inodes;
 };
 
+enum btrfs_dev_stat_values {
+        /* disk I/O failure stats */
+        BTRFS_DEV_STAT_WRITE_ERRS, /* EIO or EREMOTEIO from lower layers */
+        BTRFS_DEV_STAT_READ_ERRS, /* EIO or EREMOTEIO from lower layers */
+        BTRFS_DEV_STAT_FLUSH_ERRS, /* EIO or EREMOTEIO from lower layers */
+
+        /* stats for indirect indications for I/O failures */
+        BTRFS_DEV_STAT_CORRUPTION_ERRS, /* checksum error, bytenr error or
+                                         * contents is illegal: this is an
+                                         * indication that the block was damaged
+                                         * during read or write, or written to
+                                         * wrong location or read from wrong
+                                         * location */
+        BTRFS_DEV_STAT_GENERATION_ERRS, /* an indication that blocks have not
+                                         * been written */
+
+        BTRFS_DEV_STAT_VALUES_MAX
+};
+
 #define BTRFS_IOC_SNAP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 1, \
                                    struct btrfs_ioctl_vol_args)
 #define BTRFS_IOC_DEFRAG _IOW(BTRFS_IOCTL_MAGIC, 2, \