Add features required for basic userland management utility:

 - implement user-initiated background drive rebuild
 - implement user-initiated background consistency check
 - log controller-initiated background rebuild/check operations

Try to fix the elusive "invalid log operation" bug, and panic if we do
hit this one in the hopes of getting better information.

Tidy up diagnostic messages.

Try to use disk_create/disk_destroy correctly.  This isn't working
properly yet, but it's not clear whose fault that is.

1 files changed, 8 insertions, 4 deletions

diff --git a/sys/dev/mlx/mlxvar.h b/sys/dev/mlx/mlxvar.h
index 7847ca2..cd0cd90 100644
--- a/sys/dev/mlx/mlxvar.h
+++ b/sys/dev/mlx/mlxvar.h
@@ -148,11 +148,13 @@ struct mlx_softc
 #define MLX_STATE_SUSPEND	(1<<3)	/* controller is suspended */
     struct callout_handle mlx_timeout;	/* periodic status monitor */
     time_t		mlx_lastpoll;	/* last time_second we polled for status */
-    int			mlx_lastevent;	/* sequence number of the last event we recorded */
+    u_int16_t		mlx_lastevent;	/* sequence number of the last event we recorded */
     int			mlx_currevent;	/* sequence number last time we looked */
-    int			mlx_rebuild;	/* if >= 0, drive is being rebuilt */
-    u_int32_t		mlx_rebuildstat;/* blocks left to rebuild if active */
-    int			mlx_check;	/* if >= 0, drive is being checked */
+    int			mlx_background;	/* if != 0 rebuild or check is in progress */
+#define MLX_BACKGROUND_CHECK		1	/* we started a check */
+#define MLX_BACKGROUND_REBUILD		2	/* we started a rebuild */
+#define MLX_BACKGROUND_SPONTANEOUS	3	/* it just happened somehow */
+    struct mlx_rebuild_status mlx_rebuildstat;	/* last rebuild status */
     struct mlx_pause	mlx_pause;	/* pending pause operation details */
 
     int			mlx_locks;	/* reentrancy avoidance */
@@ -213,6 +215,7 @@ extern d_close_t	mlx_close;
 extern d_ioctl_t	mlx_ioctl;
 
 extern devclass_t	mlx_devclass;
+extern devclass_t	mlxd_devclass;
 
 /*
  * Mylex System Disk driver
@@ -220,6 +223,7 @@ extern devclass_t	mlx_devclass;
 struct mlxd_softc 
 {
     device_t		mlxd_dev;
+    dev_t		mlxd_dev_t;
     struct mlx_softc	*mlxd_controller;
     struct mlx_sysdrive	*mlxd_drive;
     struct disk		mlxd_disk;