1 files changed, 30 insertions, 6 deletions

diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h
index 0d8d419d191a..c17fd334e574 100644
--- a/include/linux/device-mapper.h
+++ b/include/linux/device-mapper.h
@@ -9,11 +9,12 @@
 #define _LINUX_DEVICE_MAPPER_H
 
 #include <linux/bio.h>
+#include <linux/blkdev.h>
 
 struct dm_target;
 struct dm_table;
-struct dm_dev;
 struct mapped_device;
+struct bio_vec;
 
 typedef enum { STATUSTYPE_INFO, STATUSTYPE_TABLE } status_type_t;
 
@@ -68,10 +69,12 @@ typedef int (*dm_status_fn) (struct dm_target *ti, status_type_t status_type,
 
 typedef int (*dm_message_fn) (struct dm_target *ti, unsigned argc, char **argv);
 
-typedef int (*dm_ioctl_fn) (struct dm_target *ti, struct inode *inode,
-                            struct file *filp, unsigned int cmd,
+typedef int (*dm_ioctl_fn) (struct dm_target *ti, unsigned int cmd,
                             unsigned long arg);
 
+typedef int (*dm_merge_fn) (struct dm_target *ti, struct bvec_merge_data *bvm,
+                            struct bio_vec *biovec, int max_size);
+
 void dm_error(const char *message);
 
 /*
@@ -79,13 +82,19 @@ void dm_error(const char *message);
  */
 void dm_set_device_limits(struct dm_target *ti, struct block_device *bdev);
 
+struct dm_dev {
+        struct block_device *bdev;
+        fmode_t mode;
+        char name[16];
+};
+
 /*
  * Constructors should call these functions to ensure destination devices
  * are opened/closed correctly.
  * FIXME: too many arguments.
  */
 int dm_get_device(struct dm_target *ti, const char *path, sector_t start,
-                  sector_t len, int mode, struct dm_dev **result);
+                  sector_t len, fmode_t mode, struct dm_dev **result);
 void dm_put_device(struct dm_target *ti, struct dm_dev *d);
 
 /*
@@ -107,6 +116,7 @@ struct target_type {
         dm_status_fn status;
         dm_message_fn message;
         dm_ioctl_fn ioctl;
+        dm_merge_fn merge;
 };
 
 struct io_restrictions {
@@ -196,6 +206,7 @@ int dm_copy_name_and_uuid(struct mapped_device *md, char *name, char *uuid);
 struct gendisk *dm_disk(struct mapped_device *md);
 int dm_suspended(struct mapped_device *md);
 int dm_noflush_suspending(struct dm_target *ti);
+union map_info *dm_get_mapinfo(struct bio *bio);
 
 /*
  * Geometry functions.
@@ -211,7 +222,7 @@ int dm_set_geometry(struct mapped_device *md, struct hd_geometry *geo);
 /*
  * First create an empty table.
  */
-int dm_table_create(struct dm_table **result, int mode,
+int dm_table_create(struct dm_table **result, fmode_t mode,
                     unsigned num_targets, struct mapped_device *md);
 
 /*
@@ -226,6 +237,11 @@ int dm_table_add_target(struct dm_table *t, const char *type,
 int dm_table_complete(struct dm_table *t);
 
 /*
+ * Unplug all devices in a table.
+ */
+void dm_table_unplug_all(struct dm_table *t);
+
+/*
  * Table reference counting.
  */
 struct dm_table *dm_get_table(struct mapped_device *md);
@@ -237,7 +253,7 @@ void dm_table_put(struct dm_table *t);
  */
 sector_t dm_table_get_size(struct dm_table *t);
 unsigned int dm_table_get_num_targets(struct dm_table *t);
-int dm_table_get_mode(struct dm_table *t);
+fmode_t dm_table_get_mode(struct dm_table *t);
 struct mapped_device *dm_table_get_md(struct dm_table *t);
 
 /*
@@ -250,6 +266,11 @@ void dm_table_event(struct dm_table *t);
  */
 int dm_swap_table(struct mapped_device *md, struct dm_table *t);
 
+/*
+ * A wrapper around vmalloc.
+ */
+void *dm_vcalloc(unsigned long nmemb, unsigned long elem_size);
+
 /*-----------------------------------------------------------------
  * Macros.
  *---------------------------------------------------------------*/
@@ -332,6 +353,9 @@ int dm_swap_table(struct mapped_device *md, struct dm_table *t);
  */
 #define dm_round_up(n, sz) (dm_div_up((n), (sz)) * (sz))
 
+#define dm_array_too_big(fixed, obj, num) \
+        ((num) > (UINT_MAX - (fixed)) / (obj))
+
 static inline sector_t to_sector(unsigned long n)
 {
         return (n >> SECTOR_SHIFT);