* 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>
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)
{
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;
+++ /dev/null
-/*
- * Copyright (C) 2009-2011 Red Hat, Inc.
- *
- * Author: Mikulas Patocka <mpatocka@redhat.com>
- *
- * This file is released under the GPL.
- */
-
-#ifndef DM_BUFIO_H
-#define DM_BUFIO_H
-
-#include <linux/blkdev.h>
-#include <linux/types.h>
-
-/*----------------------------------------------------------------*/
-
-struct dm_bufio_client;
-struct dm_buffer;
-
-/*
- * Create a buffered IO cache on a given device
- */
-struct dm_bufio_client *
-dm_bufio_client_create(struct block_device *bdev, unsigned block_size,
- unsigned reserved_buffers, unsigned aux_size,
- void (*alloc_callback)(struct dm_buffer *),
- void (*write_callback)(struct dm_buffer *));
-
-/*
- * Release a buffered IO cache.
- */
-void dm_bufio_client_destroy(struct dm_bufio_client *c);
-
-/*
- * Set the sector range.
- * When this function is called, there must be no I/O in progress on the bufio
- * client.
- */
-void dm_bufio_set_sector_offset(struct dm_bufio_client *c, sector_t start);
-
-/*
- * WARNING: to avoid deadlocks, these conditions are observed:
- *
- * - At most one thread can hold at most "reserved_buffers" simultaneously.
- * - Each other threads can hold at most one buffer.
- * - Threads which call only dm_bufio_get can hold unlimited number of
- * buffers.
- */
-
-/*
- * Read a given block from disk. Returns pointer to data. Returns a
- * pointer to dm_buffer that can be used to release the buffer or to make
- * it dirty.
- */
-void *dm_bufio_read(struct dm_bufio_client *c, sector_t block,
- struct dm_buffer **bp);
-
-/*
- * Like dm_bufio_read, but return buffer from cache, don't read
- * it. If the buffer is not in the cache, return NULL.
- */
-void *dm_bufio_get(struct dm_bufio_client *c, sector_t block,
- struct dm_buffer **bp);
-
-/*
- * Like dm_bufio_read, but don't read anything from the disk. It is
- * expected that the caller initializes the buffer and marks it dirty.
- */
-void *dm_bufio_new(struct dm_bufio_client *c, sector_t block,
- struct dm_buffer **bp);
-
-/*
- * Prefetch the specified blocks to the cache.
- * The function starts to read the blocks and returns without waiting for
- * I/O to finish.
- */
-void dm_bufio_prefetch(struct dm_bufio_client *c,
- sector_t block, unsigned n_blocks);
-
-/*
- * Release a reference obtained with dm_bufio_{read,get,new}. The data
- * pointer and dm_buffer pointer is no longer valid after this call.
- */
-void dm_bufio_release(struct dm_buffer *b);
-
-/*
- * Mark a buffer dirty. It should be called after the buffer is modified.
- *
- * In case of memory pressure, the buffer may be written after
- * dm_bufio_mark_buffer_dirty, but before dm_bufio_write_dirty_buffers. So
- * dm_bufio_write_dirty_buffers guarantees that the buffer is on-disk but
- * the actual writing may occur earlier.
- */
-void dm_bufio_mark_buffer_dirty(struct dm_buffer *b);
-
-/*
- * Mark a part of the buffer dirty.
- *
- * The specified part of the buffer is scheduled to be written. dm-bufio may
- * write the specified part of the buffer or it may write a larger superset.
- */
-void dm_bufio_mark_partial_buffer_dirty(struct dm_buffer *b,
- unsigned start, unsigned end);
-
-/*
- * Initiate writing of dirty buffers, without waiting for completion.
- */
-void dm_bufio_write_dirty_buffers_async(struct dm_bufio_client *c);
-
-/*
- * Write all dirty buffers. Guarantees that all dirty buffers created prior
- * to this call are on disk when this call exits.
- */
-int dm_bufio_write_dirty_buffers(struct dm_bufio_client *c);
-
-/*
- * Send an empty write barrier to the device to flush hardware disk cache.
- */
-int dm_bufio_issue_flush(struct dm_bufio_client *c);
-
-/*
- * Like dm_bufio_release but also move the buffer to the new
- * block. dm_bufio_write_dirty_buffers is needed to commit the new block.
- */
-void dm_bufio_release_move(struct dm_buffer *b, sector_t new_block);
-
-/*
- * Free the given buffer.
- * This is just a hint, if the buffer is in use or dirty, this function
- * does nothing.
- */
-void dm_bufio_forget(struct dm_bufio_client *c, sector_t block);
-
-/*
- * Set the minimum number of buffers before cleanup happens.
- */
-void dm_bufio_set_minimum_buffers(struct dm_bufio_client *c, unsigned n);
-
-unsigned dm_bufio_get_block_size(struct dm_bufio_client *c);
-sector_t dm_bufio_get_device_size(struct dm_bufio_client *c);
-sector_t dm_bufio_get_block_number(struct dm_buffer *b);
-void *dm_bufio_get_block_data(struct dm_buffer *b);
-void *dm_bufio_get_aux_data(struct dm_buffer *b);
-struct dm_bufio_client *dm_bufio_get_client(struct dm_buffer *b);
-
-/*----------------------------------------------------------------*/
-
-#endif
#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"
#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 */
#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>
*/
#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>
--- /dev/null
+/*
+ * Copyright (C) 2009-2011 Red Hat, Inc.
+ *
+ * Author: Mikulas Patocka <mpatocka@redhat.com>
+ *
+ * This file is released under the GPL.
+ */
+
+#ifndef _LINUX_DM_BUFIO_H
+#define _LINUX_DM_BUFIO_H
+
+#include <linux/blkdev.h>
+#include <linux/types.h>
+
+/*----------------------------------------------------------------*/
+
+struct dm_bufio_client;
+struct dm_buffer;
+
+/*
+ * Create a buffered IO cache on a given device
+ */
+struct dm_bufio_client *
+dm_bufio_client_create(struct block_device *bdev, unsigned block_size,
+ unsigned reserved_buffers, unsigned aux_size,
+ void (*alloc_callback)(struct dm_buffer *),
+ void (*write_callback)(struct dm_buffer *));
+
+/*
+ * Release a buffered IO cache.
+ */
+void dm_bufio_client_destroy(struct dm_bufio_client *c);
+
+/*
+ * Set the sector range.
+ * When this function is called, there must be no I/O in progress on the bufio
+ * client.
+ */
+void dm_bufio_set_sector_offset(struct dm_bufio_client *c, sector_t start);
+
+/*
+ * WARNING: to avoid deadlocks, these conditions are observed:
+ *
+ * - At most one thread can hold at most "reserved_buffers" simultaneously.
+ * - Each other threads can hold at most one buffer.
+ * - Threads which call only dm_bufio_get can hold unlimited number of
+ * buffers.
+ */
+
+/*
+ * Read a given block from disk. Returns pointer to data. Returns a
+ * pointer to dm_buffer that can be used to release the buffer or to make
+ * it dirty.
+ */
+void *dm_bufio_read(struct dm_bufio_client *c, sector_t block,
+ struct dm_buffer **bp);
+
+/*
+ * Like dm_bufio_read, but return buffer from cache, don't read
+ * it. If the buffer is not in the cache, return NULL.
+ */
+void *dm_bufio_get(struct dm_bufio_client *c, sector_t block,
+ struct dm_buffer **bp);
+
+/*
+ * Like dm_bufio_read, but don't read anything from the disk. It is
+ * expected that the caller initializes the buffer and marks it dirty.
+ */
+void *dm_bufio_new(struct dm_bufio_client *c, sector_t block,
+ struct dm_buffer **bp);
+
+/*
+ * Prefetch the specified blocks to the cache.
+ * The function starts to read the blocks and returns without waiting for
+ * I/O to finish.
+ */
+void dm_bufio_prefetch(struct dm_bufio_client *c,
+ sector_t block, unsigned n_blocks);
+
+/*
+ * Release a reference obtained with dm_bufio_{read,get,new}. The data
+ * pointer and dm_buffer pointer is no longer valid after this call.
+ */
+void dm_bufio_release(struct dm_buffer *b);
+
+/*
+ * Mark a buffer dirty. It should be called after the buffer is modified.
+ *
+ * In case of memory pressure, the buffer may be written after
+ * dm_bufio_mark_buffer_dirty, but before dm_bufio_write_dirty_buffers. So
+ * dm_bufio_write_dirty_buffers guarantees that the buffer is on-disk but
+ * the actual writing may occur earlier.
+ */
+void dm_bufio_mark_buffer_dirty(struct dm_buffer *b);
+
+/*
+ * Mark a part of the buffer dirty.
+ *
+ * The specified part of the buffer is scheduled to be written. dm-bufio may
+ * write the specified part of the buffer or it may write a larger superset.
+ */
+void dm_bufio_mark_partial_buffer_dirty(struct dm_buffer *b,
+ unsigned start, unsigned end);
+
+/*
+ * Initiate writing of dirty buffers, without waiting for completion.
+ */
+void dm_bufio_write_dirty_buffers_async(struct dm_bufio_client *c);
+
+/*
+ * Write all dirty buffers. Guarantees that all dirty buffers created prior
+ * to this call are on disk when this call exits.
+ */
+int dm_bufio_write_dirty_buffers(struct dm_bufio_client *c);
+
+/*
+ * Send an empty write barrier to the device to flush hardware disk cache.
+ */
+int dm_bufio_issue_flush(struct dm_bufio_client *c);
+
+/*
+ * Like dm_bufio_release but also move the buffer to the new
+ * block. dm_bufio_write_dirty_buffers is needed to commit the new block.
+ */
+void dm_bufio_release_move(struct dm_buffer *b, sector_t new_block);
+
+/*
+ * Free the given buffer.
+ * This is just a hint, if the buffer is in use or dirty, this function
+ * does nothing.
+ */
+void dm_bufio_forget(struct dm_bufio_client *c, sector_t block);
+
+/*
+ * Set the minimum number of buffers before cleanup happens.
+ */
+void dm_bufio_set_minimum_buffers(struct dm_bufio_client *c, unsigned n);
+
+unsigned dm_bufio_get_block_size(struct dm_bufio_client *c);
+sector_t dm_bufio_get_device_size(struct dm_bufio_client *c);
+sector_t dm_bufio_get_block_number(struct dm_buffer *b);
+void *dm_bufio_get_block_data(struct dm_buffer *b);
+void *dm_bufio_get_aux_data(struct dm_buffer *b);
+struct dm_bufio_client *dm_bufio_get_client(struct dm_buffer *b);
+
+/*----------------------------------------------------------------*/
+
+#endif
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