[PATCH] 2/6: Low-level code to interface with dm and support patch 3

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Signed-off-by: Adam DiCarlo <bikko@xxxxxxxxxx>
Signed-off-by: James Simshaw <simshawj@xxxxxxxxxx>
Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>





--- ORIGINAL/lib/activate/devmapper.c	2006-03-29 05:18:43.000000000 -0800
+++ PATCHED/lib/activate/devmapper.c	2006-08-03 14:46:25.000000000 -0700
@@ -148,6 +148,68 @@ static int check_table(struct lib_contex
 	return handle_table(lc, NULL, table, get_target_list());
 }
 
+/* Suspend a mapped device. */
+int dm_suspend(struct lib_context *lc, struct raid_set *rs)
+{
+	int ret = 0;
+	struct dm_task *dmt;
+
+	_init_dm();
+
+	/* Suspend <dev_name> */
+	ret = (dmt = dm_task_create(DM_DEVICE_SUSPEND)) &&
+	       dm_task_set_name(dmt, rs->name) &&
+	       dm_task_run(dmt);
+
+	_exit_dm(dmt);
+
+	return ret;
+}
+
+/* Resume a mapped device. */
+int dm_resume(struct lib_context *lc, struct raid_set *rs)
+{
+	int ret = 0;
+	struct dm_task *dmt;
+
+	_init_dm();
+
+	/* Suspend <dev_name> */
+	ret = (dmt = dm_task_create(DM_DEVICE_RESUME)) &&
+	       dm_task_set_name(dmt, rs->name) &&
+	       dm_task_run(dmt);
+
+	_exit_dm(dmt);
+
+	return ret;
+}
+
+/* Reload a mapped device. */
+int dm_reload(struct lib_context *lc, struct raid_set *rs, char *table)
+{
+	int ret = 0;
+	struct dm_task *dmt;
+
+	_init_dm();
+
+	/* Create <dev_name> */
+	ret = (dmt = dm_task_create(DM_DEVICE_RELOAD)) &&
+	       dm_task_set_name(dmt, rs->name) &&
+	       parse_table(lc, dmt, table) &&
+	       dm_task_run(dmt);
+
+	/*
+	 * In case device creation failed, check if target
+	 * isn't registered with the device-mapper core
+	 */
+	if (!ret)
+		check_table(lc, table);
+
+	_exit_dm(dmt);
+
+	return ret;
+}
+
 /* Create a mapped device. */
 int dm_create(struct lib_context *lc, struct raid_set *rs, char *table)
 {
--- ORIGINAL/lib/activate/devmapper.h	2005-05-23 05:39:55.000000000 -0700
+++ PATCHED/lib/activate/devmapper.h	2006-08-03 14:46:25.000000000 -0700
@@ -13,5 +13,8 @@ int dm_create(struct lib_context *lc, st
 int dm_remove(struct lib_context *lc, struct raid_set *rs);
 int dm_status(struct lib_context *lc, struct raid_set *rs);
 int dm_version(struct lib_context *lc, char *version, size_t size);
+int dm_suspend(struct lib_context *lc, struct raid_set *rs);
+int dm_resume(struct lib_context *lc, struct raid_set *rs);
+int dm_reload(struct lib_context *lc, struct raid_set *rs, char *table);
 
 #endif
--- ORIGINAL/include/dmraid/dmraid.h	2006-02-17 08:11:21.000000000 -0800
+++ PATCHED/include/dmraid/dmraid.h	2006-08-03 14:46:23.000000000 -0700
@@ -17,6 +17,7 @@
 #include <dmraid/display.h>
 #include <dmraid/format.h>
 #include <dmraid/metadata.h>
+#include <dmraid/reconfig.h>
 
 /*
  * Library init/exit
--- ORIGINAL/lib/internal.h	2006-07-26 01:16:18.000000000 -0700
+++ PATCHED/lib/internal.h	2006-08-03 14:46:26.000000000 -0700
@@ -35,6 +35,7 @@
 #include <dmraid/format.h>
 #include <dmraid/metadata.h>
 #include "activate/activate.h"
+#include <dmraid/reconfig.h>
 
 #ifndef	u_int16_t
 #define	u_int16_t	uint16_t



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