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Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 5 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Armijn Hemel <armijn@tjaldur.nl> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190531190112.221098808@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
83 lines
2.3 KiB
C
83 lines
2.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/* -*- mode: c; c-basic-offset: 8; -*-
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* vim: noexpandtab sw=8 ts=8 sts=0:
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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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