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Diffstat (limited to 'include/linux/device-mapper.h')
-rw-r--r--include/linux/device-mapper.h96
1 files changed, 92 insertions, 4 deletions
diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h
index cb784579956..ad3b787479a 100644
--- a/include/linux/device-mapper.h
+++ b/include/linux/device-mapper.h
@@ -1,6 +1,6 @@
/*
* Copyright (C) 2001 Sistina Software (UK) Limited.
- * Copyright (C) 2004 Red Hat, Inc. All rights reserved.
+ * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved.
*
* This file is released under the LGPL.
*/
@@ -10,6 +10,8 @@
#ifdef __KERNEL__
+#include <linux/bio.h>
+
struct dm_target;
struct dm_table;
struct dm_dev;
@@ -250,11 +252,97 @@ void dm_table_event(struct dm_table *t);
*/
int dm_swap_table(struct mapped_device *md, struct dm_table *t);
+/*-----------------------------------------------------------------
+ * Macros.
+ *---------------------------------------------------------------*/
+#define DM_NAME "device-mapper"
+
+#define DMERR(f, arg...) \
+ printk(KERN_ERR DM_NAME ": " DM_MSG_PREFIX ": " f "\n", ## arg)
+#define DMERR_LIMIT(f, arg...) \
+ do { \
+ if (printk_ratelimit()) \
+ printk(KERN_ERR DM_NAME ": " DM_MSG_PREFIX ": " \
+ f "\n", ## arg); \
+ } while (0)
+
+#define DMWARN(f, arg...) \
+ printk(KERN_WARNING DM_NAME ": " DM_MSG_PREFIX ": " f "\n", ## arg)
+#define DMWARN_LIMIT(f, arg...) \
+ do { \
+ if (printk_ratelimit()) \
+ printk(KERN_WARNING DM_NAME ": " DM_MSG_PREFIX ": " \
+ f "\n", ## arg); \
+ } while (0)
+
+#define DMINFO(f, arg...) \
+ printk(KERN_INFO DM_NAME ": " DM_MSG_PREFIX ": " f "\n", ## arg)
+#define DMINFO_LIMIT(f, arg...) \
+ do { \
+ if (printk_ratelimit()) \
+ printk(KERN_INFO DM_NAME ": " DM_MSG_PREFIX ": " f \
+ "\n", ## arg); \
+ } while (0)
+
+#ifdef CONFIG_DM_DEBUG
+# define DMDEBUG(f, arg...) \
+ printk(KERN_DEBUG DM_NAME ": " DM_MSG_PREFIX " DEBUG: " f "\n", ## arg)
+# define DMDEBUG_LIMIT(f, arg...) \
+ do { \
+ if (printk_ratelimit()) \
+ printk(KERN_DEBUG DM_NAME ": " DM_MSG_PREFIX ": " f \
+ "\n", ## arg); \
+ } while (0)
+#else
+# define DMDEBUG(f, arg...) do {} while (0)
+# define DMDEBUG_LIMIT(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
+
+/*
+ * Ceiling(n / sz)
+ */
+#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; \
+} \
+)
+
/*
- * Prepare a table for a device that will error all I/O.
- * To make it active, call dm_suspend(), dm_swap_table() then dm_resume().
+ * ceiling(n / size) * size
*/
-int dm_create_error_table(struct dm_table **result, struct mapped_device *md);
+#define dm_round_up(n, sz) (dm_div_up((n), (sz)) * (sz))
+
+static inline sector_t to_sector(unsigned long n)
+{
+ return (n >> SECTOR_SHIFT);
+}
+
+static inline unsigned long to_bytes(sector_t n)
+{
+ return (n << SECTOR_SHIFT);
+}
#endif /* __KERNEL__ */
#endif /* _LINUX_DEVICE_MAPPER_H */