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/*
* (C) 2001 Clemson University and The University of Chicago
*
* See COPYING in top-level directory.
*/
#ifndef __PVFS2_BUFMAP_H
#define __PVFS2_BUFMAP_H
/* used to describe mapped buffers */
struct pvfs_bufmap_desc {
void *uaddr; /* user space address pointer */
struct page **page_array; /* array of mapped pages */
int array_count; /* size of above arrays */
struct list_head list_link;
};
struct pvfs2_bufmap;
struct pvfs2_bufmap *pvfs2_bufmap_ref(void);
void pvfs2_bufmap_unref(struct pvfs2_bufmap *bufmap);
/*
* pvfs_bufmap_size_query is now an inline function because buffer
* sizes are not hardcoded
*/
int pvfs_bufmap_size_query(void);
int pvfs_bufmap_shift_query(void);
int pvfs_bufmap_initialize(struct PVFS_dev_map_desc *user_desc);
int get_bufmap_init(void);
void pvfs_bufmap_finalize(void);
int pvfs_bufmap_get(struct pvfs2_bufmap **mapp, int *buffer_index);
void pvfs_bufmap_put(struct pvfs2_bufmap *bufmap, int buffer_index);
int readdir_index_get(struct pvfs2_bufmap **mapp, int *buffer_index);
void readdir_index_put(struct pvfs2_bufmap *bufmap, int buffer_index);
int pvfs_bufmap_copy_from_iovec(struct pvfs2_bufmap *bufmap,
struct iov_iter *iter,
int buffer_index,
size_t size);
int pvfs_bufmap_copy_to_iovec(struct pvfs2_bufmap *bufmap,
struct iov_iter *iter,
int buffer_index,
size_t size);
size_t pvfs_bufmap_copy_to_user_task_iovec(struct task_struct *tsk,
struct iovec *iovec,
unsigned long nr_segs,
struct pvfs2_bufmap *bufmap,
int buffer_index,
size_t bytes_to_be_copied);
#endif /* __PVFS2_BUFMAP_H */
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