dm: move include files

Publish the dm-io, dm-log and dm-kcopyd headers in include/linux.

Signed-off-by: Alasdair G Kergon <agk@redhat.com>

10 files changed, 11 insertions, 274 deletions

diff --git a/drivers/md/Makefile b/drivers/md/Makefile
index be4b069bbc58..7be09eeea293 100644
--- a/drivers/md/Makefile
+++ b/drivers/md/Makefile
@@ -3,7 +3,7 @@
 #
 
 dm-mod-objs	:= dm.o dm-table.o dm-target.o dm-linear.o dm-stripe.o \
-		   dm-ioctl.o dm-io.o kcopyd.o
+		   dm-ioctl.o dm-io.o dm-kcopyd.o
 dm-multipath-objs := dm-hw-handler.o dm-path-selector.o dm-mpath.o
 dm-snapshot-objs := dm-snap.o dm-exception-store.o
 dm-mirror-objs	:= dm-raid1.o
diff --git a/drivers/md/dm-exception-store.c b/drivers/md/dm-exception-store.c
index 6933301733df..41f408068a7c 100644
--- a/drivers/md/dm-exception-store.c
+++ b/drivers/md/dm-exception-store.c
@@ -9,13 +9,13 @@
 
 #include "dm.h"
 #include "dm-snap.h"
-#include "dm-io.h"
-#include "kcopyd.h"
 
 #include <linux/mm.h>
 #include <linux/pagemap.h>
 #include <linux/vmalloc.h>
 #include <linux/slab.h>
+#include <linux/dm-io.h>
+#include <linux/dm-kcopyd.h>
 
 #define DM_MSG_PREFIX "snapshots"
 #define DM_CHUNK_SIZE_DEFAULT_SECTORS 32	/* 16KB */
diff --git a/drivers/md/dm-io.c b/drivers/md/dm-io.c
index 978c0414cf05..ed9c86cd053e 100644
--- a/drivers/md/dm-io.c
+++ b/drivers/md/dm-io.c
@@ -5,7 +5,6 @@
  * This file is released under the GPL.
  */
 
-#include "dm-io.h"
 #include "dm.h"
 
 #include <linux/bio.h>
@@ -13,6 +12,7 @@
 #include <linux/module.h>
 #include <linux/sched.h>
 #include <linux/slab.h>
+#include <linux/dm-io.h>
 
 struct dm_io_client {
 	mempool_t *pool;
diff --git a/drivers/md/dm-io.h b/drivers/md/dm-io.h
deleted file mode 100644
index b6bf17ee2f61..000000000000
--- a/drivers/md/dm-io.h
+++ /dev/null
@@ -1,85 +0,0 @@
-/*
- * Copyright (C) 2003 Sistina Software
- * Copyright (C) 2004 - 2008 Red Hat, Inc. All rights reserved.
- *
- * Device-Mapper low-level I/O.
- *
- * This file is released under the GPL.
- */
-
-#ifndef _LINUX_DM_IO_H
-#define _LINUX_DM_IO_H
-
-#ifdef __KERNEL__
-
-#include <linux/types.h>
-
-struct dm_io_region {
-	struct block_device *bdev;
-	sector_t sector;
-	sector_t count;		/* If this is zero the region is ignored. */
-};
-
-struct page_list {
-	struct page_list *next;
-	struct page *page;
-};
-
-typedef void (*io_notify_fn)(unsigned long error, void *context);
-
-enum dm_io_mem_type {
-	DM_IO_PAGE_LIST,/* Page list */
-	DM_IO_BVEC,	/* Bio vector */
-	DM_IO_VMA,	/* Virtual memory area */
-	DM_IO_KMEM,	/* Kernel memory */
-};
-
-struct dm_io_memory {
-	enum dm_io_mem_type type;
-
-	union {
-		struct page_list *pl;
-		struct bio_vec *bvec;
-		void *vma;
-		void *addr;
-	} ptr;
-
-	unsigned offset;
-};
-
-struct dm_io_notify {
-	io_notify_fn fn;	/* Callback for asynchronous requests */
-	void *context;		/* Passed to callback */
-};
-
-/*
- * IO request structure
- */
-struct dm_io_client;
-struct dm_io_request {
-	int bi_rw;			/* READ|WRITE - not READA */
-	struct dm_io_memory mem;	/* Memory to use for io */
-	struct dm_io_notify notify;	/* Synchronous if notify.fn is NULL */
-	struct dm_io_client *client;	/* Client memory handler */
-};
-
-/*
- * For async io calls, users can alternatively use the dm_io() function below
- * and dm_io_client_create() to create private mempools for the client.
- *
- * Create/destroy may block.
- */
-struct dm_io_client *dm_io_client_create(unsigned num_pages);
-int dm_io_client_resize(unsigned num_pages, struct dm_io_client *client);
-void dm_io_client_destroy(struct dm_io_client *client);
-
-/*
- * IO interface using private per-client pools.
- * Each bit in the optional 'sync_error_bits' bitset indicates whether an
- * error occurred doing io to the corresponding region.
- */
-int dm_io(struct dm_io_request *io_req, unsigned num_regions,
-	  struct dm_io_region *region, unsigned long *sync_error_bits);
-
-#endif	/* __KERNEL__ */
-#endif	/* _LINUX_DM_IO_H */
diff --git a/drivers/md/dm-kcopyd.c b/drivers/md/dm-kcopyd.c
index 17345844b03e..ee9583bee04d 100644
--- a/drivers/md/dm-kcopyd.c
+++ b/drivers/md/dm-kcopyd.c
@@ -22,8 +22,8 @@
 #include <linux/vmalloc.h>
 #include <linux/workqueue.h>
 #include <linux/mutex.h>
+#include <linux/dm-kcopyd.h>
 
-#include "kcopyd.h"
 #include "dm.h"
 
 /*-----------------------------------------------------------------
diff --git a/drivers/md/dm-kcopyd.h b/drivers/md/dm-kcopyd.h
deleted file mode 100644
index d3057846b0b0..000000000000
--- a/drivers/md/dm-kcopyd.h
+++ /dev/null
@@ -1,47 +0,0 @@
-/*
- * Copyright (C) 2001 - 2003 Sistina Software
- * Copyright (C) 2004 - 2008 Red Hat, Inc. All rights reserved.
- *
- * kcopyd provides a simple interface for copying an area of one
- * block-device to one or more other block-devices, either synchronous
- * or with an asynchronous completion notification.
- *
- * This file is released under the GPL.
- */
-
-#ifndef _LINUX_DM_KCOPYD_H
-#define _LINUX_DM_KCOPYD_H
-
-#ifdef __KERNEL__
-
-#include "dm-io.h"
-
-/* FIXME: make this configurable */
-#define DM_KCOPYD_MAX_REGIONS 8
-
-#define DM_KCOPYD_IGNORE_ERROR 1
-
-/*
- * To use kcopyd you must first create a dm_kcopyd_client object.
- */
-struct dm_kcopyd_client;
-int dm_kcopyd_client_create(unsigned num_pages,
-			    struct dm_kcopyd_client **result);
-void dm_kcopyd_client_destroy(struct dm_kcopyd_client *kc);
-
-/*
- * Submit a copy job to kcopyd.  This is built on top of the
- * previous three fns.
- *
- * read_err is a boolean,
- * write_err is a bitset, with 1 bit for each destination region
- */
-typedef void (*dm_kcopyd_notify_fn)(int read_err, unsigned long write_err,
-				    void *context);
-
-int dm_kcopyd_copy(struct dm_kcopyd_client *kc, struct dm_io_region *from,
-		   unsigned num_dests, struct dm_io_region *dests,
-		   unsigned flags, dm_kcopyd_notify_fn fn, void *context);
-
-#endif	/* __KERNEL__ */
-#endif	/* _LINUX_DM_KCOPYD_H */
diff --git a/drivers/md/dm-log.c b/drivers/md/dm-log.c
index e6b6a9d5fdd2..67a6f31b7fc3 100644
--- a/drivers/md/dm-log.c
+++ b/drivers/md/dm-log.c
@@ -9,9 +9,9 @@
 #include <linux/slab.h>
 #include <linux/module.h>
 #include <linux/vmalloc.h>
+#include <linux/dm-io.h>
+#include <linux/dm-dirty-log.h>
 
-#include "dm-log.h"
-#include "dm-io.h"
 #include "dm.h"
 
 #define DM_MSG_PREFIX "dirty region log"
diff --git a/drivers/md/dm-log.h b/drivers/md/dm-log.h
deleted file mode 100644
index 600c5fb2daad..000000000000
--- a/drivers/md/dm-log.h
+++ /dev/null
@@ -1,131 +0,0 @@
-/*
- * Copyright (C) 2003 Sistina Software
- * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved.
- *
- * Device-Mapper dirty region log.
- *
- * This file is released under the LGPL.
- */
-
-#ifndef _LINUX_DM_DIRTY_LOG
-#define _LINUX_DM_DIRTY_LOG
-
-#ifdef __KERNEL__
-
-#include <linux/types.h>
-#include <linux/device-mapper.h>
-
-typedef sector_t region_t;
-
-struct dm_dirty_log_type;
-
-struct dm_dirty_log {
-	struct dm_dirty_log_type *type;
-	void *context;
-};
-
-struct dm_dirty_log_type {
-	const char *name;
-	struct module *module;
-
-	int (*ctr)(struct dm_dirty_log *log, struct dm_target *ti,
-		   unsigned argc, char **argv);
-	void (*dtr)(struct dm_dirty_log *log);
-
-	/*
-	 * There are times when we don't want the log to touch
-	 * the disk.
-	 */
-	int (*presuspend)(struct dm_dirty_log *log);
-	int (*postsuspend)(struct dm_dirty_log *log);
-	int (*resume)(struct dm_dirty_log *log);
-
-	/*
-	 * Retrieves the smallest size of region that the log can
-	 * deal with.
-	 */
-	uint32_t (*get_region_size)(struct dm_dirty_log *log);
-
-	/*
-	 * A predicate to say whether a region is clean or not.
-	 * May block.
-	 */
-	int (*is_clean)(struct dm_dirty_log *log, region_t region);
-
-	/*
-	 *  Returns: 0, 1, -EWOULDBLOCK, < 0
-	 *
-	 * A predicate function to check the area given by
-	 * [sector, sector + len) is in sync.
-	 *
-	 * If -EWOULDBLOCK is returned the state of the region is
-	 * unknown, typically this will result in a read being
-	 * passed to a daemon to deal with, since a daemon is
-	 * allowed to block.
-	 */
-	int (*in_sync)(struct dm_dirty_log *log, region_t region,
-		       int can_block);
-
-	/*
-	 * Flush the current log state (eg, to disk).  This
-	 * function may block.
-	 */
-	int (*flush)(struct dm_dirty_log *log);
-
-	/*
-	 * Mark an area as clean or dirty.  These functions may
-	 * block, though for performance reasons blocking should
-	 * be extremely rare (eg, allocating another chunk of
-	 * memory for some reason).
-	 */
-	void (*mark_region)(struct dm_dirty_log *log, region_t region);
-	void (*clear_region)(struct dm_dirty_log *log, region_t region);
-
-	/*
-	 * Returns: <0 (error), 0 (no region), 1 (region)
-	 *
-	 * The mirrord will need perform recovery on regions of
-	 * the mirror that are in the NOSYNC state.  This
-	 * function asks the log to tell the caller about the
-	 * next region that this machine should recover.
-	 *
-	 * Do not confuse this function with 'in_sync()', one
-	 * tells you if an area is synchronised, the other
-	 * assigns recovery work.
-	*/
-	int (*get_resync_work)(struct dm_dirty_log *log, region_t *region);
-
-	/*
-	 * This notifies the log that the resync status of a region
-	 * has changed.  It also clears the region from the recovering
-	 * list (if present).
-	 */
-	void (*set_region_sync)(struct dm_dirty_log *log,
-				region_t region, int in_sync);
-
-	/*
-	 * Returns the number of regions that are in sync.
-	 */
-	region_t (*get_sync_count)(struct dm_dirty_log *log);
-
-	/*
-	 * Support function for mirror status requests.
-	 */
-	int (*status)(struct dm_dirty_log *log, status_type_t status_type,
-		      char *result, unsigned maxlen);
-};
-
-int dm_dirty_log_type_register(struct dm_dirty_log_type *type);
-int dm_dirty_log_type_unregister(struct dm_dirty_log_type *type);
-
-/*
- * Make sure you use these two functions, rather than calling
- * type->constructor/destructor() directly.
- */
-struct dm_dirty_log *dm_dirty_log_create(const char *type_name,
-					 struct dm_target *ti,
-					 unsigned argc, char **argv);
-void dm_dirty_log_destroy(struct dm_dirty_log *log);
-
-#endif	/* __KERNEL__ */
-#endif	/* _LINUX_DM_DIRTY_LOG_H */
diff --git a/drivers/md/dm-raid1.c b/drivers/md/dm-raid1.c
index 5beeced4e522..6692e5a84bb1 100644
--- a/drivers/md/dm-raid1.c
+++ b/drivers/md/dm-raid1.c
@@ -7,9 +7,6 @@
 #include "dm.h"
 #include "dm-bio-list.h"
 #include "dm-bio-record.h"
-#include "dm-io.h"
-#include "dm-log.h"
-#include "kcopyd.h"
 
 #include <linux/ctype.h>
 #include <linux/init.h>
@@ -22,6 +19,9 @@
 #include <linux/workqueue.h>
 #include <linux/log2.h>
 #include <linux/hardirq.h>
+#include <linux/dm-io.h>
+#include <linux/dm-dirty-log.h>
+#include <linux/dm-kcopyd.h>
 
 #define DM_MSG_PREFIX "raid1"
 #define DM_IO_PAGES 64
diff --git a/drivers/md/dm-snap.c b/drivers/md/dm-snap.c
index e1dcca99392e..1ba8a47d61b1 100644
--- a/drivers/md/dm-snap.c
+++ b/drivers/md/dm-snap.c
@@ -18,10 +18,10 @@
 #include <linux/slab.h>
 #include <linux/vmalloc.h>
 #include <linux/log2.h>
+#include <linux/dm-kcopyd.h>
 
 #include "dm-snap.h"
 #include "dm-bio-list.h"
-#include "kcopyd.h"
 
 #define DM_MSG_PREFIX "snapshots"