fedora core 6 1.2949 + vserver 2.2.0

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

diff --git a/drivers/md/dm.h b/drivers/md/dm.h
index 3c03c0e..e71b22d 100644 (file)
--- a/drivers/md/dm.h
+++ b/drivers/md/dm.h
@@ -21,12 +21,36 @@
 #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)
+#ifdef CONFIG_DM_DEBUG
+#  define DMDEBUG(f, arg...) printk(KERN_DEBUG DM_NAME ": " DM_MSG_PREFIX " DEBUG: " f "\n", ## arg)
+#else
+#  define DMDEBUG(f, arg...) do {} while (0)
+#endif
 
 #define DMEMIT(x...) sz += ((sz >= maxlen) ? \
                          0 : scnprintf(result + sz, maxlen - sz, x))
 
 #define SECTOR_SHIFT 9
 
+/*
+ * Definitions of return values from target end_io function.
+ */
+#define DM_ENDIO_INCOMPLETE    1
+#define DM_ENDIO_REQUEUE       2
+
+/*
+ * Definitions of return values from target map function.
+ */
+#define DM_MAPIO_SUBMITTED     0
+#define DM_MAPIO_REMAPPED      1
+#define DM_MAPIO_REQUEUE       DM_ENDIO_REQUEUE
+
+/*
+ * Suspend feature flags
+ */
+#define DM_SUSPEND_LOCKFS_FLAG         (1 << 0)
+#define DM_SUSPEND_NOFLUSH_FLAG                (1 << 1)
+
 /*
  * List of devices that a metadevice uses and should open/close.
  */
@@ -52,7 +76,7 @@ void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q);
 struct list_head *dm_table_get_devices(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);
+int dm_table_resume_targets(struct dm_table *t);
 int dm_table_any_congested(struct dm_table *t, int bdi_bits);
 void dm_table_unplug_all(struct dm_table *t);
 int dm_table_flush_all(struct dm_table *t);
@@ -67,6 +91,8 @@ void dm_put_target_type(struct target_type *t);
 int dm_target_iterate(void (*iter_func)(struct target_type *tt,
                                        void *param), void *param);
 
+xid_t dm_get_xid(struct mapped_device *md);
+
 /*-----------------------------------------------------------------
  * Useful inlines.
  *---------------------------------------------------------------*/