md: support blocking writes to an array on device failure

[deliverable/linux.git] / include / linux / raid / md_k.h

diff --git a/include/linux/raid/md_k.h b/include/linux/raid/md_k.h
index 7bb6d1abf71e85944bc20e82243cc88df8353e71..812ffa590cff097ce5303266088fa1ec7ffe55a0 100644 (file)
--- a/include/linux/raid/md_k.h
+++ b/include/linux/raid/md_k.h
@@ -84,6 +84,10 @@ struct mdk_rdev_s
 #define        AllReserved     6               /* If whole device is reserved for
                                         * one array */
 #define        AutoDetected    7               /* added by auto-detect */
+#define Blocked                8               /* An error occured on an externally
+                                        * managed array, don't allow writes
+                                        * until it is cleared */
+       wait_queue_head_t blocked_wait;
 
        int desc_nr;                    /* descriptor index in the superblock */
        int raid_disk;                  /* role of device in array */