cregit-Linux how code gets into the kernel

Release 4.10 fs/ocfs2/extent_map.h

Directory: fs/ocfs2
/* -*- mode: c; c-basic-offset: 8; -*-
 * vim: noexpandtab sw=8 ts=8 sts=0:
 *
 * extent_map.h
 *
 * In-memory file extent mappings for OCFS2.
 *
 * Copyright (C) 2004 Oracle.  All rights reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public
 * License, version 2,  as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this program; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 021110-1307, USA.
 */

#ifndef _EXTENT_MAP_H

#define _EXTENT_MAP_H


struct ocfs2_extent_map_item {
	
unsigned int			ei_cpos;
	
unsigned int			ei_phys;
	
unsigned int			ei_clusters;
	
unsigned int			ei_flags;

	
struct list_head		ei_list;
};


#define OCFS2_MAX_EXTENT_MAP_ITEMS			3

struct ocfs2_extent_map {
	
unsigned int			em_num_items;
	
struct list_head		em_list;
};

void ocfs2_extent_map_init(struct inode *inode);
void ocfs2_extent_map_trunc(struct inode *inode, unsigned int cluster);
void ocfs2_extent_map_insert_rec(struct inode *inode,
				 struct ocfs2_extent_rec *rec);

int ocfs2_get_clusters(struct inode *inode, u32 v_cluster, u32 *p_cluster,
		       u32 *num_clusters, unsigned int *extent_flags);
int ocfs2_extent_map_get_blocks(struct inode *inode, u64 v_blkno, u64 *p_blkno,
				u64 *ret_count, unsigned int *extent_flags);

int ocfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
		 u64 map_start, u64 map_len);

int ocfs2_seek_data_hole_offset(struct file *file, loff_t *offset, int origin);

int ocfs2_xattr_get_clusters(struct inode *inode, u32 v_cluster,
			     u32 *p_cluster, u32 *num_clusters,
			     struct ocfs2_extent_list *el,
			     unsigned int *extent_flags);

int ocfs2_read_virt_blocks(struct inode *inode, u64 v_block, int nr,
			   struct buffer_head *bhs[], int flags,
			   int (*validate)(struct super_block *sb,
					   struct buffer_head *bh));
int ocfs2_figure_hole_clusters(struct ocfs2_caching_info *ci,
			       struct ocfs2_extent_list *el,
			       struct buffer_head *eb_bh,
			       u32 v_cluster,
			       u32 *num_clusters);

static inline int ocfs2_read_virt_block(struct inode *inode, u64 v_block, struct buffer_head **bh, int (*validate)(struct super_block *sb, struct buffer_head *bh)) { int status = 0; if (bh == NULL) { printk("ocfs2: bh == NULL\n"); status = -EINVAL; goto bail; } status = ocfs2_read_virt_blocks(inode, v_block, 1, bh, 0, validate); bail: return status; }

Contributors

PersonTokensPropCommitsCommitProp
joel beckerjoel becker86100.00%1100.00%
Total86100.00%1100.00%

#endif /* _EXTENT_MAP_H */

Overall Contributors

PersonTokensPropCommitsCommitProp
mark fashehmark fasheh15844.26%654.55%
joel beckerjoel becker12735.57%19.09%
tao matao ma5615.69%327.27%
sunil mushransunil mushran164.48%19.09%
Total357100.00%11100.00%
Directory: fs/ocfs2
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