63 lines
1.7 KiB
C
63 lines
1.7 KiB
C
/*
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* (C) 2001 Clemson University and The University of Chicago
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*
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* See COPYING in top-level directory.
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*/
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#ifndef __ORANGEFS_BUFMAP_H
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#define __ORANGEFS_BUFMAP_H
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/* used to describe mapped buffers */
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struct orangefs_bufmap_desc {
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void *uaddr; /* user space address pointer */
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struct page **page_array; /* array of mapped pages */
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int array_count; /* size of above arrays */
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struct list_head list_link;
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};
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struct orangefs_bufmap;
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struct orangefs_bufmap *orangefs_bufmap_ref(void);
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void orangefs_bufmap_unref(struct orangefs_bufmap *bufmap);
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/*
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* orangefs_bufmap_size_query is now an inline function because buffer
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* sizes are not hardcoded
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*/
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int orangefs_bufmap_size_query(void);
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int orangefs_bufmap_shift_query(void);
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int orangefs_bufmap_initialize(struct ORANGEFS_dev_map_desc *user_desc);
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int get_bufmap_init(void);
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void orangefs_bufmap_finalize(void);
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int orangefs_bufmap_get(struct orangefs_bufmap **mapp, int *buffer_index);
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void orangefs_bufmap_put(struct orangefs_bufmap *bufmap, int buffer_index);
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int readdir_index_get(struct orangefs_bufmap **mapp, int *buffer_index);
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void readdir_index_put(struct orangefs_bufmap *bufmap, int buffer_index);
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int orangefs_bufmap_copy_from_iovec(struct orangefs_bufmap *bufmap,
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struct iov_iter *iter,
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int buffer_index,
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size_t size);
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int orangefs_bufmap_copy_to_iovec(struct orangefs_bufmap *bufmap,
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struct iov_iter *iter,
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int buffer_index,
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size_t size);
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size_t orangefs_bufmap_copy_to_user_task_iovec(struct task_struct *tsk,
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struct iovec *iovec,
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unsigned long nr_segs,
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struct orangefs_bufmap *bufmap,
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int buffer_index,
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size_t bytes_to_be_copied);
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#endif /* __ORANGEFS_BUFMAP_H */
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