mirror of
https://github.com/ibm-s390-linux/s390-tools.git
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b627b8d8e1
This commit is based on the s390-tools-1.39.0 version. Changes on top of s390-tools-1.39.0: - Add MIT license to all source files - Add LICENSE file - Transform REAMDE to README.md (markdown) - Add AUTHORS.md file - Add CONTRIBUTING.md file - Move changelog from README to CHANGELOG.md file Reviewed-by: Stefan Haberland <sth@linux.vnet.ibm.com> Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
133 lines
2.9 KiB
C
133 lines
2.9 KiB
C
/*
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* cmsfs-fuse - CMS EDF filesystem support for Linux
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*
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* Data structures
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*
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* Copyright IBM Corp. 2010, 2017
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*
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* s390-tools is free software; you can redistribute it and/or modify
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* it under the terms of the MIT license. See LICENSE for details.
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*/
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#ifndef _CMSFS_H
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#define _CMSFS_H
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#include <iconv.h>
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#include <search.h>
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#include "lib/util_list.h"
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#define COMP "cmsfs-fuse: "
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extern struct cmsfs cmsfs;
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/* conversion between absolute and relative addresses */
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#define ABS(x) ((off_t) (x - 1) * cmsfs.blksize)
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#define REL(x) ((x / cmsfs.blksize) + 1)
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struct fcache_entry {
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/* filename used as hash key */
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char name[18];
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/* location of fst entry */
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off_t fst_addr;
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/* filename string address */
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char *str;
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};
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enum cmsfs_mode {
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BINARY_MODE,
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TEXT_MODE,
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TYPE_MODE,
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};
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/* the per device global struture */
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struct cmsfs {
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/* name of the block device, e.g. /dev/dasde */
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const char *device;
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/* global file descriptor of the underlying block device */
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int fd;
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/* start of mmap of the whole block device */
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char *map;
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/* size of the disk */
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off_t size;
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/* formatted blocksize */
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int blksize;
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/* number of 512 byte blocks per block */
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int nr_blocks_512;
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/* device is read only */
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int readonly;
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/* access permission for other users */
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int allow_other;
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/* offset to label */
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off_t label;
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/* offset to file directory root FST */
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off_t fdir;
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/* offset to allocation map */
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off_t amap;
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/* depth of directories */
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int dir_levels;
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/* depth of allocation maps */
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int amap_levels;
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/* files count on the device */
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int files;
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/* conversion mode */
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enum cmsfs_mode mode;
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/* iconv codepage options */
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const char *codepage_from;
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const char *codepage_to;
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iconv_t iconv_from;
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iconv_t iconv_to;
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/* disk stats */
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int total_blocks;
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int used_blocks;
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/* blocks reserved for outstanding meta data */
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int reserved_blocks;
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/* constants */
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int fixed_ptrs_per_block;
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int var_ptrs_per_block;
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int bits_per_data_block;
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int bits_per_ptr_block;
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int data_block_mask;
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off_t amap_bytes_per_block;
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/* file cache */
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struct fcache_entry *fcache;
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int fcache_used;
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int fcache_max;
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struct hsearch_data htab;
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};
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#define MAX_TYPE_LEN 9
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struct filetype {
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char name[MAX_TYPE_LEN];
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struct util_list_node list;
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};
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#define NULL_BLOCK 0
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#define VAR_FILE_END 1
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#define PTRS_PER_BLOCK (cmsfs.fixed_ptrs_per_block)
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#define VPTRS_PER_BLOCK (cmsfs.var_ptrs_per_block)
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#define DATA_BLOCK_MASK (cmsfs.data_block_mask)
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#define BITS_PER_DATA_BLOCK (cmsfs.bits_per_data_block)
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#define BYTES_PER_BLOCK (cmsfs.amap_bytes_per_block)
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extern int get_device_info(struct cmsfs *cmsfs);
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extern int scan_conf_file(struct util_list *list);
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extern int is_edf_char(int c);
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#ifndef _CMSFS_FSCK
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int _read(void *, size_t, off_t);
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int _write(const void *, size_t, off_t);
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int _zero(off_t, size_t);
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off_t get_fixed_pointer(off_t);
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off_t get_free_block(void);
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off_t get_zero_block(void);
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void free_block(off_t);
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#endif
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#endif
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