ztest: scrub ddt repair

[mirror_zfs.git] / include / sys / vdev_disk.h

diff --git a/include/sys/vdev_disk.h b/include/sys/vdev_disk.h
index 15570b10553f4cd68c535c4fb20e929040d1dc64..908f5f32634fbc782f0e7036780ea244067618a0 100644 (file)
--- a/include/sys/vdev_disk.h
+++ b/include/sys/vdev_disk.h
@@ -23,11 +23,23 @@
  * Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
  * Written by Brian Behlendorf <behlendorf1@llnl.gov>.
  * LLNL-CODE-403049.
+ * Copyright (c) 2018 by Delphix. All rights reserved.
  */
 
 #ifndef _SYS_VDEV_DISK_H
 #define        _SYS_VDEV_DISK_H
 
+/*
+ * Don't start the slice at the default block of 34; many storage
+ * devices will use a stripe width of 128k, other vendors prefer a 1m
+ * alignment.  It is best to play it safe and ensure a 1m alignment
+ * given 512B blocks.  When the block size is larger by a power of 2
+ * we will still be 1m aligned.  Some devices are sensitive to the
+ * partition ending alignment as well.
+ */
+#define        NEW_START_BLOCK         2048
+#define        PARTITION_END_ALIGNMENT 2048
+
 #ifdef _KERNEL
 #include <sys/vdev.h>
 
@@ -35,6 +47,7 @@ typedef struct vdev_disk {
        ddi_devid_t             vd_devid;
        char                    *vd_minor;
        struct block_device     *vd_bdev;
+       krwlock_t               vd_lock;
 } vdev_disk_t;
 
 #endif /* _KERNEL */