vserver 1.9.5.x5

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

diff --git a/drivers/md/dm.h b/drivers/md/dm.h
index b4b915f..e6ef0b4 100644 (file)
--- a/drivers/md/dm.h
+++ b/drivers/md/dm.h
@@ -2,6 +2,7 @@
  * Internal header file for device mapper
  *
  * Copyright (C) 2001, 2002 Sistina Software
+ * Copyright (C) 2004 Red Hat, Inc. All rights reserved.
  *
  * This file is released under the LGPL.
  */
@@ -19,6 +20,9 @@
 #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.
@@ -51,6 +55,8 @@ struct mapped_device;
  *---------------------------------------------------------------*/
 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);
 
 /*
  * Reference counting for md.
@@ -109,10 +115,12 @@ 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_suspend_targets(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_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);
 
 /*-----------------------------------------------------------------
  * A registry of target types.
@@ -135,21 +143,22 @@ static inline int array_too_big(unsigned long fixed, unsigned long obj,
 }
 
 /*
- * ceiling(n / size) * size
+ * Ceiling(n / sz)
  */
-static inline unsigned long dm_round_up(unsigned long n, unsigned long size)
-{
-       unsigned long r = n % size;
-       return n + (r ? (size - r) : 0);
-}
+#define dm_div_up(n, sz) (((n) + (sz) - 1) / (sz))
+
+#define dm_sector_div_up(n, sz) ( \
+{ \
+       sector_t _r = ((n) + (sz) - 1); \
+       sector_div(_r, (sz)); \
+       _r; \
+} \
+)
 
 /*
- * Ceiling(n / size)
+ * ceiling(n / size) * size
  */
-static inline unsigned long dm_div_up(unsigned long n, unsigned long size)
-{
-       return dm_round_up(n, size) / size;
-}
+#define dm_round_up(n, sz) (dm_div_up((n), (sz)) * (sz))
 
 static inline sector_t to_sector(unsigned long n)
 {
@@ -161,6 +170,8 @@ static inline unsigned long to_bytes(sector_t n)
        return (n << 9);
 }
 
+int dm_split_args(int *argc, char ***argvp, char *input);
+
 /*
  * The device-mapper can be driven through one of two interfaces;
  * ioctl or filesystem, depending which patch you have applied.