Add support for changing providers priority.

Submitted by:	Mel Flynn

2 files changed, 19 insertions, 9 deletions

diff --git a/sbin/geom/class/mirror/geom_mirror.c b/sbin/geom/class/mirror/geom_mirror.c
index 38912a3..6ac4fb9 100644
--- a/sbin/geom/class/mirror/geom_mirror.c
+++ b/sbin/geom/class/mirror/geom_mirror.c
@@ -1,5 +1,5 @@
 /*-
- * Copyright (c) 2004-2005 Pawel Jakub Dawidek <pjd@FreeBSD.org>
+ * Copyright (c) 2004-2009 Pawel Jakub Dawidek <pjd@FreeBSD.org>
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -41,13 +41,12 @@ __FBSDID("$FreeBSD$");
 #include <core/geom.h>
 #include <misc/subr.h>
 
-
 uint32_t lib_version = G_LIB_VERSION;
 uint32_t version = G_MIRROR_VERSION;
 
 static char label_balance[] = "split", configure_balance[] = "none";
 static intmax_t label_slice = 4096, configure_slice = -1;
-static intmax_t insert_priority = 0;
+static intmax_t insert_priority = 0, configure_priority = -1;
 
 static void mirror_main(struct gctl_req *req, unsigned flags);
 static void mirror_activate(struct gctl_req *req);
@@ -71,10 +70,12 @@ struct g_command class_commands[] = {
 		{ 'F', "nofailsync", NULL, G_TYPE_BOOL },
 		{ 'h', "hardcode", NULL, G_TYPE_BOOL },
 		{ 'n', "noautosync", NULL, G_TYPE_BOOL },
+		{ 'p', "priority", &configure_priority, G_TYPE_NUMBER },
 		{ 's', "slice", &configure_slice, G_TYPE_NUMBER },
 		G_OPT_SENTINEL
 	    },
-	    NULL, "[-adfFhnv] [-b balance] [-s slice] name"
+	    NULL, "[-adfFhnv] [-b balance] [-s slice] name\n"
+		  "[-v] -p priority name prov"
 	},
 	{ "deactivate", G_FLAG_VERBOSE, NULL, G_NULL_OPTS, NULL,
 	    "[-v] name prov ..."
diff --git a/sbin/geom/class/mirror/gmirror.8 b/sbin/geom/class/mirror/gmirror.8
index 185b3d3..78baf0b 100644
--- a/sbin/geom/class/mirror/gmirror.8
+++ b/sbin/geom/class/mirror/gmirror.8
@@ -1,4 +1,4 @@
-.\" Copyright (c) 2004-2005 Pawel Jakub Dawidek <pjd@FreeBSD.org>
+.\" Copyright (c) 2004-2009 Pawel Jakub Dawidek <pjd@FreeBSD.org>
 .\" All rights reserved.
 .\"
 .\" Redistribution and use in source and binary forms, with or without
@@ -24,7 +24,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd November 1, 2006
+.Dd August 1, 2009
 .Dt GMIRROR 8
 .Os
 .Sh NAME
@@ -49,6 +49,12 @@
 .Op Fl s Ar slice
 .Ar name
 .Nm
+.Cm configure
+.Op Fl v
+.Fl p Ar priority
+.Ar name
+.Ar prov
+.Nm
 .Cm rebuild
 .Op Fl v
 .Ar name
@@ -115,8 +121,8 @@ indicates an action to be performed:
 .It Cm label
 Create a mirror.
 The order of components is important, because a component's priority is based on its position
-(starting from 0).
-The component with the biggest priority is used by the
+(starting from 0 to 255).
+The component with the biggest priority (the lowest number) is used by the
 .Cm prefer
 balance algorithm
 and is also used as a master component when resynchronization is needed,
@@ -159,7 +165,7 @@ Clear metadata on the given providers.
 Configure the given device.
 .Pp
 Additional options include:
-.Bl -tag -width ".Fl b Ar balance"
+.Bl -tag -width ".Fl p Ar priority"
 .It Fl a
 Turn on autosynchronization of stale components.
 .It Fl b Ar balance
@@ -175,6 +181,9 @@ Assumes device is in consistent state.
 Hardcode providers' names in metadata.
 .It Fl n
 Turn off autosynchronization of stale components.
+.It Fl p Ar priority
+Specifies priority for the given component
+.Ar prov .
 .It Fl s Ar slice
 Specifies slice size for
 .Cm split