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 #include "config.h"
15
16 #ifdef DEBUGFS
17 #include <stdio.h>
18 #include <stdlib.h>
19 #if EXT2_FLAT_INCLUDES
20 #include "ext2_fs.h"
21 #include "ext2fs.h"
22 #include "blkid.h"
23 #else
24 #include "ext2fs/ext2_fs.h"
25 #include "ext2fs/ext2fs.h"
26 #include "blkid/blkid.h"
27 #endif
28 #else
29 /*
30 * Pull in the definition of the e2fsck context structure
31 */
32 #include "e2fsck.h"
33 #endif
34
35 #if __STDC_VERSION__ < 199901L
36 # if __GNUC__ >= 2 || _MSC_VER >= 1300
37 # define __func__ __FUNCTION__
38 # else
39 # define __func__ "<unknown>"
40 # endif
41 #endif
42
43 struct buffer_head {
44 #ifdef DEBUGFS
45 ext2_filsys b_fs;
46 #else
47 e2fsck_t b_ctx;
48 #endif
49 io_channel b_io;
50 int b_size;
51 int b_err;
52 unsigned int b_dirty:1;
53 unsigned int b_uptodate:1;
54 unsigned long long b_blocknr;
55 char b_data[4096];
56 };
57
58 struct inode {
59 #ifdef DEBUGFS
60 ext2_filsys i_fs;
61 #else
62 e2fsck_t i_ctx;
63 #endif
64 ext2_ino_t i_ino;
65 struct ext2_inode i_ext2;
66 };
67
68 struct kdev_s {
69 #ifdef DEBUGFS
70 ext2_filsys k_fs;
71 #else
72 e2fsck_t k_ctx;
73 #endif
74 int k_dev;
75 };
76
77 #define K_DEV_FS 1
78 #define K_DEV_JOURNAL 2
79
80 #define lock_buffer(bh) do {} while (0)
81 #define unlock_buffer(bh) do {} while (0)
82 #define buffer_req(bh) 1
83 #define do_readahead(journal, start) do {} while (0)
84
85 struct kmem_cache {
86 unsigned int object_size;
87 };
88
89 #define cond_resched() do { } while (0)
90
91 #define __init
92
93 /*
94 * Now pull in the real linux/jfs.h definitions.
95 */
96 #include <ext2fs/kernel-jbd.h>
97
98 /*
99 * We use the standard libext2fs portability tricks for inline
100 * functions.
101 */
102 #ifdef NO_INLINE_FUNCS
103 extern struct kmem_cache *kmem_cache_create(const char *name,
104 unsigned int size,
105 unsigned int align,
106 unsigned int flags,
107 void (*ctor)(void *));
108 extern void kmem_cache_destroy(struct kmem_cache *s);
109 extern void *kmem_cache_alloc(struct kmem_cache *cachep, gfp_t flags);
110 extern void kmem_cache_free(struct kmem_cache *s, void *objp);
111 extern void *kmalloc(size_t size, gfp_t flags);
112 extern void kfree(const void *objp);
113 extern size_t journal_tag_bytes(journal_t *journal);
114 extern __u32 __hash_32(__u32 val);
115 extern __u32 hash_32(__u32 val, unsigned int bits);
116 extern __u32 hash_64(__u64 val, unsigned int bits);
117 extern void *kmalloc_array(unsigned n, unsigned size, int flags);
118 extern __u32 jbd2_chksum(journal_t *j, __u32 crc, const void *address,
119 unsigned int length);
120 extern void jbd2_descriptor_block_csum_set(journal_t *j,
121 struct buffer_head *bh);
122 #endif
123
124 #if (defined(E2FSCK_INCLUDE_INLINE_FUNCS) || !defined(NO_INLINE_FUNCS))
125 #ifdef E2FSCK_INCLUDE_INLINE_FUNCS
126 #if (__STDC_VERSION__ >= 199901L)
127 #define _INLINE_ extern inline
128 #else
129 #define _INLINE_ inline
130 #endif
131 #else /* !E2FSCK_INCLUDE_INLINE FUNCS */
132 #if (__STDC_VERSION__ >= 199901L)
133 #define _INLINE_ inline
134 #else /* not C99 */
135 #ifdef __GNUC__
136 #define _INLINE_ extern __inline__
137 #else /* For Watcom C */
138 #define _INLINE_ extern inline
139 #endif /* __GNUC__ */
140 #endif /* __STDC_VERSION__ >= 199901L */
141 #endif /* E2FSCK_INCLUDE_INLINE_FUNCS */
142
143 _INLINE_ struct kmem_cache *
kmem_cache_create(const char * name EXT2FS_ATTR ((unused)),unsigned int size,unsigned int align EXT2FS_ATTR ((unused)),unsigned int flags EXT2FS_ATTR ((unused)),void (* ctor)(void *)EXT2FS_ATTR ((unused)))144 kmem_cache_create(const char *name EXT2FS_ATTR((unused)),
145 unsigned int size,
146 unsigned int align EXT2FS_ATTR((unused)),
147 unsigned int flags EXT2FS_ATTR((unused)),
148 void (*ctor)(void *) EXT2FS_ATTR((unused)))
149 {
150 struct kmem_cache *new_cache;
151
152 new_cache = malloc(sizeof(*new_cache));
153 if (new_cache)
154 new_cache->object_size = size;
155 return new_cache;
156 }
157
kmem_cache_destroy(struct kmem_cache * s)158 _INLINE_ void kmem_cache_destroy(struct kmem_cache *s)
159 {
160 free(s);
161 }
162
kmem_cache_alloc(struct kmem_cache * cachep,gfp_t flags EXT2FS_ATTR ((unused)))163 _INLINE_ void *kmem_cache_alloc(struct kmem_cache *cachep,
164 gfp_t flags EXT2FS_ATTR((unused)))
165 {
166 return malloc(cachep->object_size);
167 }
168
kmem_cache_free(struct kmem_cache * s EXT2FS_ATTR ((unused)),void * objp)169 _INLINE_ void kmem_cache_free(struct kmem_cache *s EXT2FS_ATTR((unused)),
170 void *objp)
171 {
172 free(objp);
173 }
174
kmalloc(size_t size,gfp_t flags EXT2FS_ATTR ((unused)))175 _INLINE_ void *kmalloc(size_t size, gfp_t flags EXT2FS_ATTR((unused)))
176 {
177 return malloc(size);
178 }
179
kfree(const void * objp)180 _INLINE_ void kfree(const void *objp)
181 {
182 #ifdef HAVE_INTPTR_T
183 /*
184 * Work around a botch in the C standard, which triggers
185 * compiler warnings. For better or for worse, the kernel
186 * uses const void * for kfree, while the C standard mandates
187 * the use of void *. See: https://yarchive.net/comp/const.html
188 */
189 free((void *)(intptr_t)objp);
190 #else
191 free((void *)objp);
192 #endif
193 }
194
195 /* generic hashing taken from the Linux kernel */
196 #define GOLDEN_RATIO_32 0x61C88647
197 #define GOLDEN_RATIO_64 0x61C8864680B583EBull
198
__hash_32(__u32 val)199 _INLINE_ __u32 __hash_32(__u32 val)
200 {
201 return val * GOLDEN_RATIO_32;
202 }
203
hash_32(__u32 val,unsigned int bits)204 _INLINE_ __u32 hash_32(__u32 val, unsigned int bits)
205 {
206 /* High bits are more random, so use them. */
207 return __hash_32(val) >> (32 - bits);
208 }
209
hash_64(__u64 val,unsigned int bits)210 _INLINE_ __u32 hash_64(__u64 val, unsigned int bits)
211 {
212 if (sizeof(long) >= 8) {
213 /* 64x64-bit multiply is efficient on all 64-bit processors */
214 return val * GOLDEN_RATIO_64 >> (64 - bits);
215 } else {
216 /* Hash 64 bits using only 32x32-bit multiply. */
217 return hash_32((__u32)val ^ __hash_32(val >> 32), bits);
218 }
219 }
220
kmalloc_array(unsigned n,unsigned size,int flags EXT2FS_ATTR ((unused)))221 _INLINE_ void *kmalloc_array(unsigned n, unsigned size,
222 int flags EXT2FS_ATTR((unused)))
223 {
224 if (n && (~0U)/n < size)
225 return NULL;
226 return malloc(n * size);
227 }
228
jbd2_chksum(journal_t * j EXT2FS_ATTR ((unused)),__u32 crc,const void * address,unsigned int length)229 _INLINE_ __u32 jbd2_chksum(journal_t *j EXT2FS_ATTR((unused)),
230 __u32 crc, const void *address,
231 unsigned int length)
232 {
233 return ext2fs_crc32c_le(crc, address, length);
234 }
235
jbd2_descriptor_block_csum_set(journal_t * j,struct buffer_head * bh)236 _INLINE_ void jbd2_descriptor_block_csum_set(journal_t *j,
237 struct buffer_head *bh)
238 {
239 struct jbd2_journal_block_tail *tail;
240 __u32 csum;
241
242 if (!jbd2_journal_has_csum_v2or3(j))
243 return;
244
245 tail = (struct jbd2_journal_block_tail *)(bh->b_data + j->j_blocksize -
246 sizeof(struct jbd2_journal_block_tail));
247 tail->t_checksum = 0;
248 csum = jbd2_chksum(j, j->j_csum_seed, bh->b_data, j->j_blocksize);
249 tail->t_checksum = cpu_to_be32(csum);
250 }
251 #undef _INLINE_
252 #endif
253
254 /*
255 * Kernel compatibility functions are defined in journal.c
256 */
257 int jbd2_journal_bmap(journal_t *journal, unsigned long block,
258 unsigned long long *phys);
259 struct buffer_head *getblk(kdev_t ctx, unsigned long long blocknr,
260 int blocksize);
261 int sync_blockdev(kdev_t kdev);
262 void ll_rw_block(int rw, int op_flags, int nr, struct buffer_head *bh[]);
263 void mark_buffer_dirty(struct buffer_head *bh);
264 void mark_buffer_uptodate(struct buffer_head *bh, int val);
265 void brelse(struct buffer_head *bh);
266 int buffer_uptodate(struct buffer_head *bh);
267 void wait_on_buffer(struct buffer_head *bh);
268
269 /*
270 * Define newer 2.5 interfaces
271 */
272 #define __getblk(dev, blocknr, blocksize) getblk(dev, blocknr, blocksize)
273 #define set_buffer_uptodate(bh) mark_buffer_uptodate(bh, 1)
274
275 #ifdef DEBUGFS
276 #include <assert.h>
277 #undef J_ASSERT
278 #define J_ASSERT(x) assert(x)
279
280 #define JSB_HAS_INCOMPAT_FEATURE(jsb, mask) \
281 ((jsb)->s_header.h_blocktype == ext2fs_cpu_to_be32(JBD2_SUPERBLOCK_V2) && \
282 ((jsb)->s_feature_incompat & ext2fs_cpu_to_be32((mask))))
283 #else /* !DEBUGFS */
284
285 extern e2fsck_t e2fsck_global_ctx; /* Try your very best not to use this! */
286
287 #define J_ASSERT(assert) \
288 do { if (!(assert)) { \
289 printf ("Assertion failure in %s() at %s line %d: " \
290 "\"%s\"\n", \
291 __func__, __FILE__, __LINE__, # assert); \
292 fatal_error(e2fsck_global_ctx, 0); \
293 } } while (0)
294
295 #endif /* DEBUGFS */
296
297 #ifndef EFSBADCRC
298 #define EFSBADCRC EXT2_ET_BAD_CRC
299 #endif
300 #ifndef EFSCORRUPTED
301 #define EFSCORRUPTED EXT2_ET_FILESYSTEM_CORRUPTED
302 #endif
303
304 /* recovery.c */
305 extern int jbd2_journal_recover (journal_t *journal);
306 extern int jbd2_journal_skip_recovery (journal_t *);
307
308 /* revoke.c */
309 extern int jbd2_journal_init_revoke(journal_t *, int);
310 extern void jbd2_journal_destroy_revoke(journal_t *);
311 extern void jbd2_journal_destroy_revoke_record_cache(void);
312 extern void jbd2_journal_destroy_revoke_table_cache(void);
313 extern int jbd2_journal_init_revoke_record_cache(void);
314 extern int jbd2_journal_init_revoke_table_cache(void);
315
316
317 extern int jbd2_journal_set_revoke(journal_t *, unsigned long long, tid_t);
318 extern int jbd2_journal_test_revoke(journal_t *, unsigned long long, tid_t);
319 extern void jbd2_journal_clear_revoke(journal_t *);
320
321 #endif /* _JFS_USER_H */
322