e2fsck/jfs_user.h

   1 /*
   2  * Compatibility header file for e2fsck which should be included
   3  * instead of linux/jfs.h
   4  *
   5  * Copyright (C) 2000 Stephen C. Tweedie
   6  *
   7  * This file may be redistributed under the terms of the
   8  * GNU General Public License version 2 or at your discretion
   9  * any later version.
  10  */
  11 #ifndef _JFS_USER_H
  12 #define _JFS_USER_H
  13
  14 #ifdef DEBUGFS
  15 #include <stdio.h>
  16 #include <stdlib.h>
  17 #if EXT2_FLAT_INCLUDES
  18 #include "ext2_fs.h"
  19 #include "ext2fs.h"
  20 #include "blkid.h"
  21 #else
  22 #include "ext2fs/ext2_fs.h"
  23 #include "ext2fs/ext2fs.h"
  24 #include "blkid/blkid.h"
  25 #endif
  26 #else
  27 /*
  28  * Pull in the definition of the e2fsck context structure
  29  */
  30 #include "e2fsck.h"
  31 #endif
  32
  33 #if __STDC_VERSION__ < 199901L
  34 # if __GNUC__ >= 2 || _MSC_VER >= 1300
  35 #  define __func__ __FUNCTION__
  36 # else
  37 #  define __func__ "<unknown>"
  38 # endif
  39 #endif
  40
  41 struct buffer_head {
  42 #ifdef DEBUGFS
  43         ext2_filsys     b_fs;
  44 #else
  45         e2fsck_t        b_ctx;
  46 #endif
  47         io_channel      b_io;
  48         int             b_size;
  49         int             b_err;
  50         unsigned int    b_dirty:1;
  51         unsigned int    b_uptodate:1;
  52         unsigned long long b_blocknr;
  53         char            b_data[1024];
  54 };
  55
  56 struct inode {
  57 #ifdef DEBUGFS
  58         ext2_filsys     i_fs;
  59 #else
  60         e2fsck_t        i_ctx;
  61 #endif
  62         ext2_ino_t      i_ino;
  63         struct ext2_inode i_ext2;
  64 };
  65
  66 struct kdev_s {
  67 #ifdef DEBUGFS
  68         ext2_filsys     k_fs;
  69 #else
  70         e2fsck_t        k_ctx;
  71 #endif
  72         int             k_dev;
  73 };
  74
  75 #define K_DEV_FS        1
  76 #define K_DEV_JOURNAL   2
  77
  78 #define lock_buffer(bh) do {} while (0)
  79 #define unlock_buffer(bh) do {} while (0)
  80 #define buffer_req(bh) 1
  81 #define do_readahead(journal, start) do {} while (0)
  82
  83 typedef struct {
  84         int     object_length;
  85 } lkmem_cache_t;
  86
  87 #define kmem_cache_alloc(cache, flags) malloc((cache)->object_length)
  88 #define kmem_cache_free(cache, obj) free(obj)
  89 #define kmem_cache_create(name, len, a, b, c) do_cache_create(len)
  90 #define kmem_cache_destroy(cache) do_cache_destroy(cache)
  91 #define kmalloc(len, flags) malloc(len)
  92 #define kfree(p) free(p)
  93
  94 #define cond_resched()  do { } while (0)
  95
  96 #define __init
  97
  98 /*
  99  * Now pull in the real linux/jfs.h definitions.
 100  */
 101 #include <ext2fs/kernel-jbd.h>
 102
 103 /*
 104  * We use the standard libext2fs portability tricks for inline
 105  * functions.
 106  */
 107 #ifdef NO_INLINE_FUNCS
 108 extern lkmem_cache_t *do_cache_create(int len);
 109 extern void do_cache_destroy(lkmem_cache_t *cache);
 110 extern size_t journal_tag_bytes(journal_t *journal);
 111 extern __u32 __hash_32(__u32 val);
 112 extern __u32 hash_32(__u32 val, unsigned int bits);
 113 extern __u32 hash_64(__u64 val, unsigned int bits);
 114 #endif
 115
 116 #if (defined(E2FSCK_INCLUDE_INLINE_FUNCS) || !defined(NO_INLINE_FUNCS))
 117 #ifdef E2FSCK_INCLUDE_INLINE_FUNCS
 118 #if (__STDC_VERSION__ >= 199901L)
 119 #define _INLINE_ extern inline
 120 #else
 121 #define _INLINE_ inline
 122 #endif
 123 #else /* !E2FSCK_INCLUDE_INLINE FUNCS */
 124 #if (__STDC_VERSION__ >= 199901L)
 125 #define _INLINE_ inline
 126 #else /* not C99 */
 127 #ifdef __GNUC__
 128 #define _INLINE_ extern __inline__
 129 #else                           /* For Watcom C */
 130 #define _INLINE_ extern inline
 131 #endif /* __GNUC__ */
 132 #endif /* __STDC_VERSION__ >= 199901L */
 133 #endif /* E2FSCK_INCLUDE_INLINE_FUNCS */
 134
 135 _INLINE_ lkmem_cache_t *do_cache_create(int len)
 136 {
 137         lkmem_cache_t *new_cache;
 138
 139         new_cache = malloc(sizeof(*new_cache));
 140         if (new_cache)
 141                 new_cache->object_length = len;
 142         return new_cache;
 143 }
 144
 145 _INLINE_ void do_cache_destroy(lkmem_cache_t *cache)
 146 {
 147         free(cache);
 148 }
 149
 150 /* generic hashing taken from the Linux kernel */
 151 #define GOLDEN_RATIO_32 0x61C88647
 152 #define GOLDEN_RATIO_64 0x61C8864680B583EBull
 153
 154 _INLINE_ __u32 __hash_32(__u32 val)
 155 {
 156         return val * GOLDEN_RATIO_32;
 157 }
 158
 159 _INLINE_ __u32 hash_32(__u32 val, unsigned int bits)
 160 {
 161         /* High bits are more random, so use them. */
 162         return __hash_32(val) >> (32 - bits);
 163 }
 164
 165 _INLINE_ __u32 hash_64(__u64 val, unsigned int bits)
 166 {
 167         if (sizeof(long) >= 8) {
 168                 /* 64x64-bit multiply is efficient on all 64-bit processors */
 169                 return val * GOLDEN_RATIO_64 >> (64 - bits);
 170         } else {
 171                 /* Hash 64 bits using only 32x32-bit multiply. */
 172                 return hash_32((__u32)val ^ __hash_32(val >> 32), bits);
 173         }
 174 }
 175
 176 #undef _INLINE_
 177 #endif
 178
 179 /*
 180  * Kernel compatibility functions are defined in journal.c
 181  */
 182 int journal_bmap(journal_t *journal, blk64_t block, unsigned long long *phys);
 183 struct buffer_head *getblk(kdev_t ctx, blk64_t blocknr, int blocksize);
 184 int sync_blockdev(kdev_t kdev);
 185 void ll_rw_block(int rw, int dummy, struct buffer_head *bh[]);
 186 void mark_buffer_dirty(struct buffer_head *bh);
 187 void mark_buffer_uptodate(struct buffer_head *bh, int val);
 188 void brelse(struct buffer_head *bh);
 189 int buffer_uptodate(struct buffer_head *bh);
 190 void wait_on_buffer(struct buffer_head *bh);
 191
 192 /*
 193  * Define newer 2.5 interfaces
 194  */
 195 #define __getblk(dev, blocknr, blocksize) getblk(dev, blocknr, blocksize)
 196 #define set_buffer_uptodate(bh) mark_buffer_uptodate(bh, 1)
 197
 198 #ifdef DEBUGFS
 199 #include <assert.h>
 200 #undef J_ASSERT
 201 #define J_ASSERT(x)     assert(x)
 202
 203 #define JSB_HAS_INCOMPAT_FEATURE(jsb, mask)                             \
 204         ((jsb)->s_header.h_blocktype == ext2fs_cpu_to_be32(JFS_SUPERBLOCK_V2) &&        \
 205          ((jsb)->s_feature_incompat & ext2fs_cpu_to_be32((mask))))
 206 #else  /* !DEBUGFS */
 207
 208 extern e2fsck_t e2fsck_global_ctx;  /* Try your very best not to use this! */
 209
 210 #define J_ASSERT(assert)                                                \
 211         do { if (!(assert)) {                                           \
 212                 printf ("Assertion failure in %s() at %s line %d: "     \
 213                         "\"%s\"\n",                                     \
 214                         __func__, __FILE__, __LINE__, # assert);        \
 215                 fatal_error(e2fsck_global_ctx, 0);                      \
 216         } } while (0)
 217
 218 #endif /* DEBUGFS */
 219
 220 #ifndef EFSBADCRC
 221 #define EFSBADCRC       EXT2_ET_BAD_CRC
 222 #endif
 223 #ifndef EFSCORRUPTED
 224 #define EFSCORRUPTED    EXT2_ET_FILESYSTEM_CORRUPTED
 225 #endif
 226
 227 /* recovery.c */
 228 extern int      journal_recover    (journal_t *journal);
 229 extern int      journal_skip_recovery (journal_t *);
 230
 231 /* revoke.c */
 232 extern int      journal_init_revoke(journal_t *, int);
 233 extern void     journal_destroy_revoke(journal_t *);
 234 extern void     journal_destroy_revoke_caches(void);
 235 extern int      journal_init_revoke_caches(void);
 236
 237 extern int      journal_set_revoke(journal_t *, unsigned long long, tid_t);
 238 extern int      journal_test_revoke(journal_t *, unsigned long long, tid_t);
 239 extern void     journal_clear_revoke(journal_t *);
 240
 241 #endif /* _JFS_USER_H */