1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*
 
 
 3 * extent_map.h
 4 *
 5 * In-memory file extent mappings for OCFS2.
 6 *
 7 * Copyright (C) 2004 Oracle.  All rights reserved.
 8 */
 9
10#ifndef _EXTENT_MAP_H
11#define _EXTENT_MAP_H
12
13struct ocfs2_extent_map_item {
14	unsigned int			ei_cpos;
15	unsigned int			ei_phys;
16	unsigned int			ei_clusters;
17	unsigned int			ei_flags;
18
19	struct list_head		ei_list;
20};
21
22#define OCFS2_MAX_EXTENT_MAP_ITEMS			3
23struct ocfs2_extent_map {
24	unsigned int			em_num_items;
25	struct list_head		em_list;
26};
27
28void ocfs2_extent_map_init(struct inode *inode);
29void ocfs2_extent_map_trunc(struct inode *inode, unsigned int cluster);
30void ocfs2_extent_map_insert_rec(struct inode *inode,
31				 struct ocfs2_extent_rec *rec);
32
33int ocfs2_get_clusters(struct inode *inode, u32 v_cluster, u32 *p_cluster,
34		       u32 *num_clusters, unsigned int *extent_flags);
35int ocfs2_extent_map_get_blocks(struct inode *inode, u64 v_blkno, u64 *p_blkno,
36				u64 *ret_count, unsigned int *extent_flags);
37
38int ocfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
39		 u64 map_start, u64 map_len);
40
41int ocfs2_overwrite_io(struct inode *inode, struct buffer_head *di_bh,
42		       u64 map_start, u64 map_len);
43
44int ocfs2_seek_data_hole_offset(struct file *file, loff_t *offset, int origin);
45
46int ocfs2_xattr_get_clusters(struct inode *inode, u32 v_cluster,
47			     u32 *p_cluster, u32 *num_clusters,
48			     struct ocfs2_extent_list *el,
49			     unsigned int *extent_flags);
50
51int ocfs2_read_virt_blocks(struct inode *inode, u64 v_block, int nr,
52			   struct buffer_head *bhs[], int flags,
53			   int (*validate)(struct super_block *sb,
54					   struct buffer_head *bh));
55int ocfs2_figure_hole_clusters(struct ocfs2_caching_info *ci,
56			       struct ocfs2_extent_list *el,
57			       struct buffer_head *eb_bh,
58			       u32 v_cluster,
59			       u32 *num_clusters);
60static inline int ocfs2_read_virt_block(struct inode *inode, u64 v_block,
61					struct buffer_head **bh,
62					int (*validate)(struct super_block *sb,
63							struct buffer_head *bh))
64{
65	int status = 0;
66
67	if (bh == NULL) {
68		printk("ocfs2: bh == NULL\n");
69		status = -EINVAL;
70		goto bail;
71	}
72
73	status = ocfs2_read_virt_blocks(inode, v_block, 1, bh, 0, validate);
74
75bail:
76	return status;
77}
78
79
80#endif  /* _EXTENT_MAP_H */

 1/* SPDX-License-Identifier: GPL-2.0-only */
 2/* -*- mode: c; c-basic-offset: 8; -*-
 3 * vim: noexpandtab sw=8 ts=8 sts=0:
 4 *
 5 * extent_map.h
 6 *
 7 * In-memory file extent mappings for OCFS2.
 8 *
 9 * Copyright (C) 2004 Oracle.  All rights reserved.
10 */
11
12#ifndef _EXTENT_MAP_H
13#define _EXTENT_MAP_H
14
15struct ocfs2_extent_map_item {
16	unsigned int			ei_cpos;
17	unsigned int			ei_phys;
18	unsigned int			ei_clusters;
19	unsigned int			ei_flags;
20
21	struct list_head		ei_list;
22};
23
24#define OCFS2_MAX_EXTENT_MAP_ITEMS			3
25struct ocfs2_extent_map {
26	unsigned int			em_num_items;
27	struct list_head		em_list;
28};
29
30void ocfs2_extent_map_init(struct inode *inode);
31void ocfs2_extent_map_trunc(struct inode *inode, unsigned int cluster);
32void ocfs2_extent_map_insert_rec(struct inode *inode,
33				 struct ocfs2_extent_rec *rec);
34
35int ocfs2_get_clusters(struct inode *inode, u32 v_cluster, u32 *p_cluster,
36		       u32 *num_clusters, unsigned int *extent_flags);
37int ocfs2_extent_map_get_blocks(struct inode *inode, u64 v_blkno, u64 *p_blkno,
38				u64 *ret_count, unsigned int *extent_flags);
39
40int ocfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
41		 u64 map_start, u64 map_len);
42
43int ocfs2_overwrite_io(struct inode *inode, struct buffer_head *di_bh,
44		       u64 map_start, u64 map_len);
45
46int ocfs2_seek_data_hole_offset(struct file *file, loff_t *offset, int origin);
47
48int ocfs2_xattr_get_clusters(struct inode *inode, u32 v_cluster,
49			     u32 *p_cluster, u32 *num_clusters,
50			     struct ocfs2_extent_list *el,
51			     unsigned int *extent_flags);
52
53int ocfs2_read_virt_blocks(struct inode *inode, u64 v_block, int nr,
54			   struct buffer_head *bhs[], int flags,
55			   int (*validate)(struct super_block *sb,
56					   struct buffer_head *bh));
57int ocfs2_figure_hole_clusters(struct ocfs2_caching_info *ci,
58			       struct ocfs2_extent_list *el,
59			       struct buffer_head *eb_bh,
60			       u32 v_cluster,
61			       u32 *num_clusters);
62static inline int ocfs2_read_virt_block(struct inode *inode, u64 v_block,
63					struct buffer_head **bh,
64					int (*validate)(struct super_block *sb,
65							struct buffer_head *bh))
66{
67	int status = 0;
68
69	if (bh == NULL) {
70		printk("ocfs2: bh == NULL\n");
71		status = -EINVAL;
72		goto bail;
73	}
74
75	status = ocfs2_read_virt_blocks(inode, v_block, 1, bh, 0, validate);
76
77bail:
78	return status;
79}
80
81
82#endif  /* _EXTENT_MAP_H */