linux 2.6.16.38 w/ vs2.0.3-rc1

[linux-2.6.git] / drivers / md / dm.h

diff --git a/drivers/md/dm.h b/drivers/md/dm.h
index 3c03c0e..4eaf075 100644 (file)
--- a/drivers/md/dm.h
+++ b/drivers/md/dm.h
@@ -2,7 +2,7 @@
  * Internal header file for device mapper
  *
  * Copyright (C) 2001, 2002 Sistina Software
- * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
+ * Copyright (C) 2004 Red Hat, Inc. All rights reserved.
  *
  * This file is released under the LGPL.
  */
@@ -14,17 +14,25 @@
 #include <linux/device-mapper.h>
 #include <linux/list.h>
 #include <linux/blkdev.h>
-#include <linux/hdreg.h>
 
 #define DM_NAME "device-mapper"
-
-#define DMERR(f, arg...) printk(KERN_ERR DM_NAME ": " DM_MSG_PREFIX ": " f "\n", ## arg)
-#define DMWARN(f, arg...) printk(KERN_WARNING DM_NAME ": " DM_MSG_PREFIX ": " f "\n", ## arg)
-#define DMINFO(f, arg...) printk(KERN_INFO DM_NAME ": " DM_MSG_PREFIX ": " f "\n", ## arg)
+#define DMWARN(f, x...) printk(KERN_WARNING DM_NAME ": " f "\n" , ## x)
+#define DMERR(f, x...) printk(KERN_ERR DM_NAME ": " f "\n" , ## x)
+#define DMINFO(f, x...) printk(KERN_INFO DM_NAME ": " f "\n" , ## x)
 
 #define DMEMIT(x...) sz += ((sz >= maxlen) ? \
                          0 : scnprintf(result + sz, maxlen - sz, x))
 
+/*
+ * FIXME: I think this should be with the definition of sector_t
+ * in types.h.
+ */
+#ifdef CONFIG_LBD
+#define SECTOR_FORMAT "%llu"
+#else
+#define SECTOR_FORMAT "%lu"
+#endif
+
 #define SECTOR_SHIFT 9
 
 /*
@@ -40,16 +48,75 @@ struct dm_dev {
 };
 
 struct dm_table;
+struct mapped_device;
 
 /*-----------------------------------------------------------------
- * Internal table functions.
+ * Functions for manipulating a struct mapped_device.
+ * Drop the reference with dm_put when you finish with the object.
  *---------------------------------------------------------------*/
+int dm_create(struct mapped_device **md);
+int dm_create_with_minor(unsigned int minor, struct mapped_device **md);
+void dm_set_mdptr(struct mapped_device *md, void *ptr);
+void *dm_get_mdptr(dev_t dev);
+struct mapped_device *dm_get_md(dev_t dev);
+
+/*
+ * Reference counting for md.
+ */
+void dm_get(struct mapped_device *md);
+void dm_put(struct mapped_device *md);
+
+/*
+ * A device can still be used while suspended, but I/O is deferred.
+ */
+int dm_suspend(struct mapped_device *md, int with_lockfs);
+int dm_resume(struct mapped_device *md);
+
+/*
+ * The device must be suspended before calling this method.
+ */
+int dm_swap_table(struct mapped_device *md, struct dm_table *t);
+
+/*
+ * Drop a reference on the table when you've finished with the
+ * result.
+ */
+struct dm_table *dm_get_table(struct mapped_device *md);
+
+/*
+ * Event functions.
+ */
+uint32_t dm_get_event_nr(struct mapped_device *md);
+int dm_wait_event(struct mapped_device *md, int event_nr);
+
+/*
+ * Info functions.
+ */
+struct gendisk *dm_disk(struct mapped_device *md);
+int dm_suspended(struct mapped_device *md);
+
+/*-----------------------------------------------------------------
+ * Functions for manipulating a table.  Tables are also reference
+ * counted.
+ *---------------------------------------------------------------*/
+int dm_table_create(struct dm_table **result, int mode, unsigned num_targets);
+
+void dm_table_get(struct dm_table *t);
+void dm_table_put(struct dm_table *t);
+
+int dm_table_add_target(struct dm_table *t, const char *type,
+                       sector_t start, sector_t len, char *params);
+int dm_table_complete(struct dm_table *t);
 void dm_table_event_callback(struct dm_table *t,
                             void (*fn)(void *), void *context);
+void dm_table_event(struct dm_table *t);
+sector_t dm_table_get_size(struct dm_table *t);
 struct dm_target *dm_table_get_target(struct dm_table *t, unsigned int index);
 struct dm_target *dm_table_find_target(struct dm_table *t, sector_t sector);
 void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q);
+unsigned int dm_table_get_num_targets(struct dm_table *t);
 struct list_head *dm_table_get_devices(struct dm_table *t);
+int dm_table_get_mode(struct dm_table *t);
 void dm_table_presuspend_targets(struct dm_table *t);
 void dm_table_postsuspend_targets(struct dm_table *t);
 void dm_table_resume_targets(struct dm_table *t);
@@ -67,6 +134,7 @@ void dm_put_target_type(struct target_type *t);
 int dm_target_iterate(void (*iter_func)(struct target_type *tt,
                                        void *param), void *param);
 
+
 /*-----------------------------------------------------------------
  * Useful inlines.
  *---------------------------------------------------------------*/
@@ -124,7 +192,5 @@ void dm_stripe_exit(void);
 
 void *dm_vcalloc(unsigned long nmemb, unsigned long elem_size);
 union map_info *dm_get_mapinfo(struct bio *bio);
-int dm_open_count(struct mapped_device *md);
-int dm_lock_for_deletion(struct mapped_device *md);
 
 #endif