dm bufio: move dm-bufio.h to include/linux/

Move dm-bufio.h to include/linux/ so that external GPL'd DM target
modules can use it.

It is better to allow the use of dm-bufio than force external modules
to implement the equivalent buffered IO mechanism in some new way.  The
hope is this will encourage the use of dm-bufio; which will then make it
easier for a GPL'd external DM target module to be included upstream.

A couple dm-bufio EXPORT_SYMBOL exports have also been updated to use
EXPORT_SYMBOL_GPL.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>

diff --git a/drivers/md/dm-bufio.c b/drivers/md/dm-bufio.c
index f5360a6260ff4c87057ff8ee1e52000fa588352a..87795a361d0931425fbe24bf1ef11aac5536e07d 100644 (file)
--- a/drivers/md/dm-bufio.c
+++ b/drivers/md/dm-bufio.c
@@ -6,7 +6,7 @@
  * This file is released under the GPL.
  */
 
-#include "dm-bufio.h"
+#include <linux/dm-bufio.h>
 
 #include <linux/device-mapper.h>
 #include <linux/dm-io.h>
@@ -1478,13 +1478,13 @@ void dm_bufio_forget(struct dm_bufio_client *c, sector_t block)
 
        dm_bufio_unlock(c);
 }
-EXPORT_SYMBOL(dm_bufio_forget);
+EXPORT_SYMBOL_GPL(dm_bufio_forget);
 
 void dm_bufio_set_minimum_buffers(struct dm_bufio_client *c, unsigned n)
 {
        c->minimum_buffers = n;
 }
-EXPORT_SYMBOL(dm_bufio_set_minimum_buffers);
+EXPORT_SYMBOL_GPL(dm_bufio_set_minimum_buffers);
 
 unsigned dm_bufio_get_block_size(struct dm_bufio_client *c)
 {
@@ -1690,7 +1690,7 @@ struct dm_bufio_client *dm_bufio_client_create(struct block_device *bdev, unsign
        INIT_LIST_HEAD(&c->reserved_buffers);
        c->need_reserved_buffers = reserved_buffers;
 
-       c->minimum_buffers = DM_BUFIO_MIN_BUFFERS;
+       dm_bufio_set_minimum_buffers(c, DM_BUFIO_MIN_BUFFERS);
 
        init_waitqueue_head(&c->free_buffer_wait);
        c->async_write_error = 0;

diff --git a/drivers/md/dm-integrity.c b/drivers/md/dm-integrity.c
index 6c81b11d05211d2103ecf44c7d8c336ab1f9ecbd..77d9fe58dae22118e872571da2a0542a7fe44b08 100644 (file)
--- a/drivers/md/dm-integrity.c
+++ b/drivers/md/dm-integrity.c
@@ -18,7 +18,7 @@
 #include <crypto/hash.h>
 #include <crypto/skcipher.h>
 #include <linux/async_tx.h>
-#include "dm-bufio.h"
+#include <linux/dm-bufio.h>
 
 #define DM_MSG_PREFIX "integrity"
 

diff --git a/drivers/md/dm-snap-persistent.c b/drivers/md/dm-snap-persistent.c
index c5534d294773fc0267a1b4c7438a3316e74d417a..3c50c4e4da8f39ee56703f9e0abc2461f8b96659 100644 (file)
--- a/drivers/md/dm-snap-persistent.c
+++ b/drivers/md/dm-snap-persistent.c
@@ -14,7 +14,7 @@
 #include <linux/export.h>
 #include <linux/slab.h>
 #include <linux/dm-io.h>
-#include "dm-bufio.h"
+#include <linux/dm-bufio.h>
 
 #define DM_MSG_PREFIX "persistent snapshot"
 #define DM_CHUNK_SIZE_DEFAULT_SECTORS 32       /* 16KB */

diff --git a/drivers/md/dm-verity.h b/drivers/md/dm-verity.h
index b675bc015512b5f1e96f22536f153ef34e6e8419..69f9a298f8c965d125de3eea598b8ad83f68cc92 100644 (file)
--- a/drivers/md/dm-verity.h
+++ b/drivers/md/dm-verity.h
@@ -12,7 +12,7 @@
 #ifndef DM_VERITY_H
 #define DM_VERITY_H
 
-#include "dm-bufio.h"
+#include <linux/dm-bufio.h>
 #include <linux/device-mapper.h>
 #include <crypto/hash.h>
 

diff --git a/drivers/md/persistent-data/dm-block-manager.c b/drivers/md/persistent-data/dm-block-manager.c
index ea15d220ced7c1314d8c51471d73fa1e28bb74da..492a3f8ac1199b841215758119e4167b46d9b71e 100644 (file)
--- a/drivers/md/persistent-data/dm-block-manager.c
+++ b/drivers/md/persistent-data/dm-block-manager.c
@@ -5,8 +5,8 @@
  */
 #include "dm-block-manager.h"
 #include "dm-persistent-data-internal.h"
-#include "../dm-bufio.h"
 
+#include <linux/dm-bufio.h>
 #include <linux/crc32c.h>
 #include <linux/module.h>
 #include <linux/slab.h>

diff --git a/drivers/md/dm-bufio.h b/include/linux/dm-bufio.h
similarity index 98%
rename from drivers/md/dm-bufio.h
rename to include/linux/dm-bufio.h
index be732d3f86119a0698f6ce32e6c4951997898e9f..3c8b7d274bd9b85d2238a6b7d673566983eec570 100644 (file)
--- a/drivers/md/dm-bufio.h
+++ b/include/linux/dm-bufio.h
@@ -6,8 +6,8 @@
  * This file is released under the GPL.
  */
 
-#ifndef DM_BUFIO_H
-#define DM_BUFIO_H
+#ifndef _LINUX_DM_BUFIO_H
+#define _LINUX_DM_BUFIO_H
 
 #include <linux/blkdev.h>
 #include <linux/types.h>