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80 lines
2.2 KiB
80 lines
2.2 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* extent_map.h |
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* |
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* In-memory file extent mappings for OCFS2. |
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* |
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* Copyright (C) 2004 Oracle. All rights reserved. |
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*/ |
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#ifndef _EXTENT_MAP_H |
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#define _EXTENT_MAP_H |
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struct ocfs2_extent_map_item { |
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unsigned int ei_cpos; |
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unsigned int ei_phys; |
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unsigned int ei_clusters; |
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unsigned int ei_flags; |
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struct list_head ei_list; |
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}; |
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#define OCFS2_MAX_EXTENT_MAP_ITEMS 3 |
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struct ocfs2_extent_map { |
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unsigned int em_num_items; |
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struct list_head em_list; |
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}; |
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void ocfs2_extent_map_init(struct inode *inode); |
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void ocfs2_extent_map_trunc(struct inode *inode, unsigned int cluster); |
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void ocfs2_extent_map_insert_rec(struct inode *inode, |
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struct ocfs2_extent_rec *rec); |
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int ocfs2_get_clusters(struct inode *inode, u32 v_cluster, u32 *p_cluster, |
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u32 *num_clusters, unsigned int *extent_flags); |
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int ocfs2_extent_map_get_blocks(struct inode *inode, u64 v_blkno, u64 *p_blkno, |
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u64 *ret_count, unsigned int *extent_flags); |
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int ocfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
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u64 map_start, u64 map_len); |
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int ocfs2_overwrite_io(struct inode *inode, struct buffer_head *di_bh, |
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u64 map_start, u64 map_len); |
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int ocfs2_seek_data_hole_offset(struct file *file, loff_t *offset, int origin); |
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int ocfs2_xattr_get_clusters(struct inode *inode, u32 v_cluster, |
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u32 *p_cluster, u32 *num_clusters, |
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struct ocfs2_extent_list *el, |
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unsigned int *extent_flags); |
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int ocfs2_read_virt_blocks(struct inode *inode, u64 v_block, int nr, |
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struct buffer_head *bhs[], int flags, |
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int (*validate)(struct super_block *sb, |
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struct buffer_head *bh)); |
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int ocfs2_figure_hole_clusters(struct ocfs2_caching_info *ci, |
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struct ocfs2_extent_list *el, |
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struct buffer_head *eb_bh, |
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u32 v_cluster, |
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u32 *num_clusters); |
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static inline int ocfs2_read_virt_block(struct inode *inode, u64 v_block, |
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struct buffer_head **bh, |
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int (*validate)(struct super_block *sb, |
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struct buffer_head *bh)) |
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{ |
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int status = 0; |
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if (bh == NULL) { |
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printk("ocfs2: bh == NULL\n"); |
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status = -EINVAL; |
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goto bail; |
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} |
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status = ocfs2_read_virt_blocks(inode, v_block, 1, bh, 0, validate); |
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bail: |
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return status; |
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} |
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#endif /* _EXTENT_MAP_H */
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