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 be4b069bbc5..7be09eeea29 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 6933301733d..41f408068a7 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 978c0414cf0..ed9c86cd053 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 b6bf17ee2f6..00000000000
--- 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 17345844b03..ee9583bee04 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 d3057846b0b..00000000000
--- 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 e6b6a9d5fdd..67a6f31b7fc 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 600c5fb2daa..00000000000
--- 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 5beeced4e52..6692e5a84bb 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 e1dcca99392..1ba8a47d61b 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"