cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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extent_map.h (2270B)

      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 */