[deliverable/linux.git] / fs / orangefs / pvfs2-bufmap.h

/*
 * (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 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 */
Commit	Line	Data
f7ab093f MM	1	/*
	2	* (C) 2001 Clemson University and The University of Chicago
	3	*
	4	* See COPYING in top-level directory.
	5	*/
	6
	7	#ifndef __PVFS2_BUFMAP_H
	8	#define __PVFS2_BUFMAP_H
	9
	10	/* used to describe mapped buffers */
	11	struct pvfs_bufmap_desc {
	12	void uaddr; / user space address pointer */
	13	struct page *page_array; / array of mapped pages */
	14	int array_count; /* size of above arrays */
	15	struct list_head list_link;
	16	};
	17
	18	struct pvfs2_bufmap;
	19
	20	struct pvfs2_bufmap *pvfs2_bufmap_ref(void);
	21	void pvfs2_bufmap_unref(struct pvfs2_bufmap *bufmap);
	22
	23	/*
	24	* pvfs_bufmap_size_query is now an inline function because buffer
	25	* sizes are not hardcoded
	26	*/
	27	int pvfs_bufmap_size_query(void);
	28
	29	int pvfs_bufmap_shift_query(void);
	30
	31	int pvfs_bufmap_initialize(struct PVFS_dev_map_desc *user_desc);
	32
	33	int get_bufmap_init(void);
	34
	35	void pvfs_bufmap_finalize(void);
	36
	37	int pvfs_bufmap_get(struct pvfs2_bufmap *mapp, int buffer_index);
	38
	39	void pvfs_bufmap_put(struct pvfs2_bufmap *bufmap, int buffer_index);
	40
	41	int readdir_index_get(struct pvfs2_bufmap *mapp, int buffer_index);
	42
	43	void readdir_index_put(struct pvfs2_bufmap *bufmap, int buffer_index);
	44
4d1c4404 MM	45	int pvfs_bufmap_copy_from_iovec(struct pvfs2_bufmap *bufmap,
	46	struct iov_iter *iter,
	47	int buffer_index,
	48	size_t size);
	49
	50	int pvfs_bufmap_copy_to_iovec(struct pvfs2_bufmap *bufmap,
	51	struct iov_iter *iter,
	52	int buffer_index);
f7ab093f MM	53
	54	size_t pvfs_bufmap_copy_to_user_task_iovec(struct task_struct *tsk,
	55	struct iovec *iovec,
	56	unsigned long nr_segs,
	57	struct pvfs2_bufmap *bufmap,
	58	int buffer_index,
	59	size_t bytes_to_be_copied);
	60
	61	#endif /* __PVFS2_BUFMAP_H */