netfilter: xtables: make XT_ALIGN() usable in exported headers by exporting __ALIGN_K...

[safe/jmp/linux-2.6] / include / linux / device-mapper.h

diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h
index deac3b4..1381cd9 100644 (file)
--- a/include/linux/device-mapper.h
+++ b/include/linux/device-mapper.h
@@ -84,13 +84,16 @@ typedef int (*dm_merge_fn) (struct dm_target *ti, struct bvec_merge_data *bvm,
 
 typedef int (*iterate_devices_callout_fn) (struct dm_target *ti,
                                           struct dm_dev *dev,
-                                          sector_t physical_start,
+                                          sector_t start, sector_t len,
                                           void *data);
 
 typedef int (*dm_iterate_devices_fn) (struct dm_target *ti,
                                      iterate_devices_callout_fn fn,
                                      void *data);
 
+typedef void (*dm_io_hints_fn) (struct dm_target *ti,
+                               struct queue_limits *limits);
+
 /*
  * Returns:
  *    0: The target can handle the next I/O immediately.
@@ -103,7 +106,8 @@ void dm_error(const char *message);
 /*
  * Combine device limits.
  */
-void dm_set_device_limits(struct dm_target *ti, struct block_device *bdev);
+int dm_set_device_limits(struct dm_target *ti, struct dm_dev *dev,
+                        sector_t start, sector_t len, void *data);
 
 struct dm_dev {
        struct block_device *bdev;
@@ -114,10 +118,9 @@ struct dm_dev {
 /*
  * 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, fmode_t mode, struct dm_dev **result);
+int dm_get_device(struct dm_target *ti, const char *path, fmode_t mode,
+                                                struct dm_dev **result);
 void dm_put_device(struct dm_target *ti, struct dm_dev *d);
 
 /*
@@ -150,6 +153,7 @@ struct target_type {
        dm_merge_fn merge;
        dm_busy_fn busy;
        dm_iterate_devices_fn iterate_devices;
+       dm_io_hints_fn io_hints;
 
        /* For internal device-mapper use. */
        struct list_head list;
@@ -163,7 +167,6 @@ struct dm_target {
        sector_t begin;
        sector_t len;
 
-       /* FIXME: turn this into a mask, and merge with queue_limits */
        /* Always a power of 2 */
        sector_t split_io;
 
@@ -177,12 +180,6 @@ struct dm_target {
         */
        unsigned num_flush_requests;
 
-       /*
-        * These are automatically filled in by
-        * dm_table_get_device.
-        */
-       struct queue_limits limits;
-
        /* target specific data */
        void *private;
 
@@ -237,9 +234,10 @@ void dm_uevent_add(struct mapped_device *md, struct list_head *elist);
 const char *dm_device_name(struct mapped_device *md);
 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_suspended(struct dm_target *ti);
 int dm_noflush_suspending(struct dm_target *ti);
 union map_info *dm_get_mapinfo(struct bio *bio);
+union map_info *dm_get_rq_mapinfo(struct request *rq);
 
 /*
  * Geometry functions.
@@ -277,7 +275,7 @@ void dm_table_unplug_all(struct dm_table *t);
 /*
  * Table reference counting.
  */
-struct dm_table *dm_get_table(struct mapped_device *md);
+struct dm_table *dm_get_live_table(struct mapped_device *md);
 void dm_table_get(struct dm_table *t);
 void dm_table_put(struct dm_table *t);
 
@@ -296,8 +294,10 @@ void dm_table_event(struct dm_table *t);
 
 /*
  * The device must be suspended before calling this method.
+ * Returns the previous table, which the caller must destroy.
  */
-int dm_swap_table(struct mapped_device *md, struct dm_table *t);
+struct dm_table *dm_swap_table(struct mapped_device *md,
+                              struct dm_table *t);
 
 /*
  * A wrapper around vmalloc.
@@ -402,4 +402,12 @@ static inline unsigned long to_bytes(sector_t n)
        return (n << SECTOR_SHIFT);
 }
 
+/*-----------------------------------------------------------------
+ * Helper for block layer and dm core operations
+ *---------------------------------------------------------------*/
+void dm_dispatch_request(struct request *rq);
+void dm_requeue_unmapped_request(struct request *rq);
+void dm_kill_unmapped_request(struct request *rq, int error);
+int dm_underlying_device_busy(struct request_queue *q);
+
 #endif /* _LINUX_DEVICE_MAPPER_H */