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>
126 lines
2.5 KiB
C
126 lines
2.5 KiB
C
/*
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* cmsfs-fuse - CMS EDF filesystem support for Linux
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*
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* EDF and label 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 _EDF_H
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#define _EDF_H
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#include "helper.h"
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/*
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* File status table entry
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*/
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struct fst_entry {
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char name[8];
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char type[8];
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char res1[8];
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short int mode;
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char res2[4];
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char record_format;
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char flag;
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int record_len;
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char res3[4];
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unsigned int fop;
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/* number of data blocks (not incl. pointer blocks) */
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int nr_blocks;
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int nr_records;
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char levels;
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char ptr_size;
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char date[6];
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char res4[4];
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};
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struct cms_label {
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char id[6];
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char user_id[6];
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unsigned int blocksize;
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unsigned int dop;
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unsigned int f_cylinders;
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unsigned int max_cylinders;
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unsigned int total_blocks;
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unsigned int used_blocks;
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unsigned int fst_entry_size;
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unsigned int fst_per_block;
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char date[6];
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unsigned int res1[3];
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char res2[8];
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};
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#define RECORD_LEN_VARIABLE 0xe5
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#define RECORD_LEN_FIXED 0xc6
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/* TODO: correct for fixed? */
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#define MAX_RECORD_LEN 0xffff
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#define FST_ENTRY_SIZE sizeof(struct fst_entry)
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#define FST_ENTRY_DIR_NAME 0x0000000100000000ULL
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#define FST_ENTRY_DIR_TYPE 0xc4c9d9c5c3e3d6d9ULL /* 'DIRECTOR' */
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#define FST_ENTRY_ALLOC_NAME 0x0000000200000000ULL
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#define FST_ENTRY_ALLOC_TYPE 0xc1d3d3d6c3d4c1d7ULL /* 'ALLOCMAP' */
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#define FST_FLAG_CENTURY 0x0008
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#define FST_FOP_OFFSET 0x28
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#define FST_LEVEL_OFFSET 0x34
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#define VAR_RECORD_HEADER_SIZE 0x2
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#define VAR_RECORD_SPANNED 0xffffffff
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#define PTR_SIZE (sizeof(struct fixed_ptr))
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#define VPTR_SIZE (sizeof(struct var_ptr))
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struct fixed_ptr {
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unsigned int next;
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};
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struct var_ptr {
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unsigned int next;
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int hi_record_nr;
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unsigned int disp;
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};
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static inline int is_directory(const char *name,
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const char *type)
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{
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if ((*(unsigned long long *) name) != FST_ENTRY_DIR_NAME)
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return 0;
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if ((*(unsigned long long *) type) != FST_ENTRY_DIR_TYPE)
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return 0;
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return 1;
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}
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static inline int is_allocmap(const char *name,
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const char *type)
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{
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if ((*(unsigned long long *) name) != FST_ENTRY_ALLOC_NAME)
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return 0;
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if ((*(unsigned long long *) type) != FST_ENTRY_ALLOC_TYPE)
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return 0;
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return 1;
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}
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static inline int is_file(void *name, void *type)
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{
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if ((*(unsigned long long *) name) == 0ULL)
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return 0;
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/* Assumption: type = 0 is not legal */
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if ((*(unsigned long long *) type) == 0ULL)
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return 0;
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return 1;
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}
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#endif
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