2 * (C) 2001 Clemson University and The University of Chicago
4 * See COPYING in top-level directory.
7 #ifndef __ORANGEFS_BUFMAP_H
8 #define __ORANGEFS_BUFMAP_H
10 /* used to describe mapped buffers */
11 struct orangefs_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;
18 struct orangefs_bufmap;
20 struct orangefs_bufmap *orangefs_bufmap_ref(void);
21 void orangefs_bufmap_unref(struct orangefs_bufmap *bufmap);
24 * orangefs_bufmap_size_query is now an inline function because buffer
25 * sizes are not hardcoded
27 int orangefs_bufmap_size_query(void);
29 int orangefs_bufmap_shift_query(void);
31 int orangefs_bufmap_initialize(struct ORANGEFS_dev_map_desc *user_desc);
33 int get_bufmap_init(void);
35 void orangefs_bufmap_finalize(void);
37 int orangefs_bufmap_get(struct orangefs_bufmap **mapp, int *buffer_index);
39 void orangefs_bufmap_put(struct orangefs_bufmap *bufmap, int buffer_index);
41 int readdir_index_get(struct orangefs_bufmap **mapp, int *buffer_index);
43 void readdir_index_put(struct orangefs_bufmap *bufmap, int buffer_index);
45 int orangefs_bufmap_copy_from_iovec(struct orangefs_bufmap *bufmap,
46 struct iov_iter *iter,
50 int orangefs_bufmap_copy_to_iovec(struct orangefs_bufmap *bufmap,
51 struct iov_iter *iter,
55 size_t orangefs_bufmap_copy_to_user_task_iovec(struct task_struct *tsk,
57 unsigned long nr_segs,
58 struct orangefs_bufmap *bufmap,
60 size_t bytes_to_be_copied);
62 #endif /* __ORANGEFS_BUFMAP_H */