old_e2fsprogs/ext2fs/ext2fs_inline.c

/* vi: set sw=4 ts=4: */
/*
 * ext2fs.h --- ext2fs
 *
 * Copyright (C) 1993, 1994, 1995, 1996 Theodore Ts'o.
 *
 * %Begin-Header%
 * This file may be redistributed under the terms of the GNU Public
 * License.
 * %End-Header%
 */

#include "ext2fs.h"
#include "bitops.h"
#include <string.h>

/*
 *  Allocate memory
 */
errcode_t ext2fs_get_mem(unsigned long size, void *ptr)
{
	void **pp = (void **)ptr;

	*pp = malloc(size);
	if (!*pp)
		return EXT2_ET_NO_MEMORY;
	return 0;
}

/*
 * Free memory
 */
errcode_t ext2fs_free_mem(void *ptr)
{
	void **pp = (void **)ptr;

	free(*pp);
	*pp = 0;
	return 0;
}

/*
 *  Resize memory
 */
errcode_t ext2fs_resize_mem(unsigned long EXT2FS_ATTR((unused)) old_size,
				     unsigned long size, void *ptr)
{
	void *p;

	/* Use "memcpy" for pointer assignments here to avoid problems
	 * with C99 strict type aliasing rules. */
	memcpy(&p, ptr, sizeof (p));
	p = xrealloc(p, size);
	memcpy(ptr, &p, sizeof (p));
	return 0;
}

/*
 * Mark a filesystem superblock as dirty
 */
void ext2fs_mark_super_dirty(ext2_filsys fs)
{
	fs->flags |= EXT2_FLAG_DIRTY | EXT2_FLAG_CHANGED;
}

/*
 * Mark a filesystem as changed
 */
void ext2fs_mark_changed(ext2_filsys fs)
{
	fs->flags |= EXT2_FLAG_CHANGED;
}

/*
 * Check to see if a filesystem has changed
 */
int ext2fs_test_changed(ext2_filsys fs)
{
	return (fs->flags & EXT2_FLAG_CHANGED);
}

/*
 * Mark a filesystem as valid
 */
void ext2fs_mark_valid(ext2_filsys fs)
{
	fs->flags |= EXT2_FLAG_VALID;
}

/*
 * Mark a filesystem as NOT valid
 */
void ext2fs_unmark_valid(ext2_filsys fs)
{
	fs->flags &= ~EXT2_FLAG_VALID;
}

/*
 * Check to see if a filesystem is valid
 */
int ext2fs_test_valid(ext2_filsys fs)
{
	return (fs->flags & EXT2_FLAG_VALID);
}

/*
 * Mark the inode bitmap as dirty
 */
void ext2fs_mark_ib_dirty(ext2_filsys fs)
{
	fs->flags |= EXT2_FLAG_IB_DIRTY | EXT2_FLAG_CHANGED;
}

/*
 * Mark the block bitmap as dirty
 */
void ext2fs_mark_bb_dirty(ext2_filsys fs)
{
	fs->flags |= EXT2_FLAG_BB_DIRTY | EXT2_FLAG_CHANGED;
}

/*
 * Check to see if a filesystem's inode bitmap is dirty
 */
int ext2fs_test_ib_dirty(ext2_filsys fs)
{
	return (fs->flags & EXT2_FLAG_IB_DIRTY);
}

/*
 * Check to see if a filesystem's block bitmap is dirty
 */
int ext2fs_test_bb_dirty(ext2_filsys fs)
{
	return (fs->flags & EXT2_FLAG_BB_DIRTY);
}

/*
 * Return the group # of a block
 */
int ext2fs_group_of_blk(ext2_filsys fs, blk_t blk)
{
	return (blk - fs->super->s_first_data_block) /
		fs->super->s_blocks_per_group;
}

/*
 * Return the group # of an inode number
 */
int ext2fs_group_of_ino(ext2_filsys fs, ext2_ino_t ino)
{
	return (ino - 1) / fs->super->s_inodes_per_group;
}

blk_t ext2fs_inode_data_blocks(ext2_filsys fs,
					struct ext2_inode *inode)
{
       return inode->i_blocks -
	      (inode->i_file_acl ? fs->blocksize >> 9 : 0);
}


__u16 ext2fs_swab16(__u16 val)
{
	return (val >> 8) | (val << 8);
}

__u32 ext2fs_swab32(__u32 val)
{
	return ((val>>24) | ((val>>8)&0xFF00) |
		((val<<8)&0xFF0000) | (val<<24));
}

int ext2fs_test_generic_bitmap(ext2fs_generic_bitmap bitmap,
					blk_t bitno);

int ext2fs_test_generic_bitmap(ext2fs_generic_bitmap bitmap,
					blk_t bitno)
{
	if ((bitno < bitmap->start) || (bitno > bitmap->end)) {
		ext2fs_warn_bitmap2(bitmap, EXT2FS_TEST_ERROR, bitno);
		return 0;
	}
	return ext2fs_test_bit(bitno - bitmap->start, bitmap->bitmap);
}

int ext2fs_mark_block_bitmap(ext2fs_block_bitmap bitmap,
				       blk_t block)
{
	return ext2fs_mark_generic_bitmap((ext2fs_generic_bitmap)
				       bitmap,
					  block);
}

int ext2fs_unmark_block_bitmap(ext2fs_block_bitmap bitmap,
					 blk_t block)
{
	return ext2fs_unmark_generic_bitmap((ext2fs_generic_bitmap) bitmap,
					    block);
}

int ext2fs_test_block_bitmap(ext2fs_block_bitmap bitmap,
				       blk_t block)
{
	return ext2fs_test_generic_bitmap((ext2fs_generic_bitmap) bitmap,
					  block);
}

int ext2fs_mark_inode_bitmap(ext2fs_inode_bitmap bitmap,
				       ext2_ino_t inode)
{
	return ext2fs_mark_generic_bitmap((ext2fs_generic_bitmap) bitmap,
					  inode);
}

int ext2fs_unmark_inode_bitmap(ext2fs_inode_bitmap bitmap,
					 ext2_ino_t inode)
{
	return ext2fs_unmark_generic_bitmap((ext2fs_generic_bitmap) bitmap,
				     inode);
}

int ext2fs_test_inode_bitmap(ext2fs_inode_bitmap bitmap,
				       ext2_ino_t inode)
{
	return ext2fs_test_generic_bitmap((ext2fs_generic_bitmap) bitmap,
					  inode);
}

void ext2fs_fast_mark_block_bitmap(ext2fs_block_bitmap bitmap,
					    blk_t block)
{
	ext2fs_set_bit(block - bitmap->start, bitmap->bitmap);
}

void ext2fs_fast_unmark_block_bitmap(ext2fs_block_bitmap bitmap,
					      blk_t block)
{
	ext2fs_clear_bit(block - bitmap->start, bitmap->bitmap);
}

int ext2fs_fast_test_block_bitmap(ext2fs_block_bitmap bitmap,
					    blk_t block)
{
	return ext2fs_test_bit(block - bitmap->start, bitmap->bitmap);
}

void ext2fs_fast_mark_inode_bitmap(ext2fs_inode_bitmap bitmap,
					    ext2_ino_t inode)
{
	ext2fs_set_bit(inode - bitmap->start, bitmap->bitmap);
}

void ext2fs_fast_unmark_inode_bitmap(ext2fs_inode_bitmap bitmap,
					      ext2_ino_t inode)
{
	ext2fs_clear_bit(inode - bitmap->start, bitmap->bitmap);
}

int ext2fs_fast_test_inode_bitmap(ext2fs_inode_bitmap bitmap,
					   ext2_ino_t inode)
{
	return ext2fs_test_bit(inode - bitmap->start, bitmap->bitmap);
}

blk_t ext2fs_get_block_bitmap_start(ext2fs_block_bitmap bitmap)
{
	return bitmap->start;
}

ext2_ino_t ext2fs_get_inode_bitmap_start(ext2fs_inode_bitmap bitmap)
{
	return bitmap->start;
}

blk_t ext2fs_get_block_bitmap_end(ext2fs_block_bitmap bitmap)
{
	return bitmap->end;
}

ext2_ino_t ext2fs_get_inode_bitmap_end(ext2fs_inode_bitmap bitmap)
{
	return bitmap->end;
}

int ext2fs_test_block_bitmap_range(ext2fs_block_bitmap bitmap,
					    blk_t block, int num)
{
	int	i;

	if ((block < bitmap->start) || (block+num-1 > bitmap->end)) {
		ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_TEST,
				   block, bitmap->description);
		return 0;
	}
	for (i=0; i < num; i++) {
		if (ext2fs_fast_test_block_bitmap(bitmap, block+i))
			return 0;
	}
	return 1;
}

int ext2fs_fast_test_block_bitmap_range(ext2fs_block_bitmap bitmap,
						 blk_t block, int num)
{
	int	i;

	for (i=0; i < num; i++) {
		if (ext2fs_fast_test_block_bitmap(bitmap, block+i))
			return 0;
	}
	return 1;
}

void ext2fs_mark_block_bitmap_range(ext2fs_block_bitmap bitmap,
					     blk_t block, int num)
{
	int	i;

	if ((block < bitmap->start) || (block+num-1 > bitmap->end)) {
		ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_MARK, block,
				   bitmap->description);
		return;
	}
	for (i=0; i < num; i++)
		ext2fs_set_bit(block + i - bitmap->start, bitmap->bitmap);
}

void ext2fs_fast_mark_block_bitmap_range(ext2fs_block_bitmap bitmap,
						  blk_t block, int num)
{
	int	i;

	for (i=0; i < num; i++)
		ext2fs_set_bit(block + i - bitmap->start, bitmap->bitmap);
}

void ext2fs_unmark_block_bitmap_range(ext2fs_block_bitmap bitmap,
					       blk_t block, int num)
{
	int	i;

	if ((block < bitmap->start) || (block+num-1 > bitmap->end)) {
		ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_UNMARK, block,
				   bitmap->description);
		return;
	}
	for (i=0; i < num; i++)
		ext2fs_clear_bit(block + i - bitmap->start, bitmap->bitmap);
}

void ext2fs_fast_unmark_block_bitmap_range(ext2fs_block_bitmap bitmap,
						    blk_t block, int num)
{
	int	i;
	for (i=0; i < num; i++)
		ext2fs_clear_bit(block + i - bitmap->start, bitmap->bitmap);
}
1	/* vi: set sw=4 ts=4: */
2	/*
3	* ext2fs.h --- ext2fs
4	*
5	* Copyright (C) 1993, 1994, 1995, 1996 Theodore Ts'o.
6	*
7	* %Begin-Header%
8	* This file may be redistributed under the terms of the GNU Public
9	* License.
10	* %End-Header%
11	*/
12
13	#include "ext2fs.h"
14	#include "bitops.h"
15	#include <string.h>
16
17	/*
18	* Allocate memory
19	*/
20	errcode_t ext2fs_get_mem(unsigned long size, void *ptr)
21	{
22	void pp = (void )ptr;
23
24	*pp = malloc(size);
25	if (!*pp)
26	return EXT2_ET_NO_MEMORY;
27	return 0;
28	}
29
30	/*
31	* Free memory
32	*/
33	errcode_t ext2fs_free_mem(void *ptr)
34	{
35	void pp = (void )ptr;
36
37	free(*pp);
38	*pp = 0;
39	return 0;
40	}
41
42	/*
43	* Resize memory
44	*/
45	errcode_t ext2fs_resize_mem(unsigned long EXT2FS_ATTR((unused)) old_size,
46	unsigned long size, void *ptr)
47	{
48	void *p;
49
50	/* Use "memcpy" for pointer assignments here to avoid problems
51	* with C99 strict type aliasing rules. */
52	memcpy(&p, ptr, sizeof (p));
53	p = xrealloc(p, size);
54	memcpy(ptr, &p, sizeof (p));
55	return 0;
56	}
57
58	/*
59	* Mark a filesystem superblock as dirty
60	*/
61	void ext2fs_mark_super_dirty(ext2_filsys fs)
62	{
63	fs->flags \|= EXT2_FLAG_DIRTY \| EXT2_FLAG_CHANGED;
64	}
65
66	/*
67	* Mark a filesystem as changed
68	*/
69	void ext2fs_mark_changed(ext2_filsys fs)
70	{
71	fs->flags \|= EXT2_FLAG_CHANGED;
72	}
73
74	/*
75	* Check to see if a filesystem has changed
76	*/
77	int ext2fs_test_changed(ext2_filsys fs)
78	{
79	return (fs->flags & EXT2_FLAG_CHANGED);
80	}
81
82	/*
83	* Mark a filesystem as valid
84	*/
85	void ext2fs_mark_valid(ext2_filsys fs)
86	{
87	fs->flags \|= EXT2_FLAG_VALID;
88	}
89
90	/*
91	* Mark a filesystem as NOT valid
92	*/
93	void ext2fs_unmark_valid(ext2_filsys fs)
94	{
95	fs->flags &= ~EXT2_FLAG_VALID;
96	}
97
98	/*
99	* Check to see if a filesystem is valid
100	*/
101	int ext2fs_test_valid(ext2_filsys fs)
102	{
103	return (fs->flags & EXT2_FLAG_VALID);
104	}
105
106	/*
107	* Mark the inode bitmap as dirty
108	*/
109	void ext2fs_mark_ib_dirty(ext2_filsys fs)
110	{
111	fs->flags \|= EXT2_FLAG_IB_DIRTY \| EXT2_FLAG_CHANGED;
112	}
113
114	/*
115	* Mark the block bitmap as dirty
116	*/
117	void ext2fs_mark_bb_dirty(ext2_filsys fs)
118	{
119	fs->flags \|= EXT2_FLAG_BB_DIRTY \| EXT2_FLAG_CHANGED;
120	}
121
122	/*
123	* Check to see if a filesystem's inode bitmap is dirty
124	*/
125	int ext2fs_test_ib_dirty(ext2_filsys fs)
126	{
127	return (fs->flags & EXT2_FLAG_IB_DIRTY);
128	}
129
130	/*
131	* Check to see if a filesystem's block bitmap is dirty
132	*/
133	int ext2fs_test_bb_dirty(ext2_filsys fs)
134	{
135	return (fs->flags & EXT2_FLAG_BB_DIRTY);
136	}
137
138	/*
139	* Return the group # of a block
140	*/
141	int ext2fs_group_of_blk(ext2_filsys fs, blk_t blk)
142	{
143	return (blk - fs->super->s_first_data_block) /
144	fs->super->s_blocks_per_group;
145	}
146
147	/*
148	* Return the group # of an inode number
149	*/
150	int ext2fs_group_of_ino(ext2_filsys fs, ext2_ino_t ino)
151	{
152	return (ino - 1) / fs->super->s_inodes_per_group;
153	}
154
155	blk_t ext2fs_inode_data_blocks(ext2_filsys fs,
156	struct ext2_inode *inode)
157	{
158	return inode->i_blocks -
159	(inode->i_file_acl ? fs->blocksize >> 9 : 0);
160	}
161
162
163
164
165
166
167
168
169
170	__u16 ext2fs_swab16(__u16 val)
171	{
172	return (val >> 8) \| (val << 8);
173	}
174
175	__u32 ext2fs_swab32(__u32 val)
176	{
177	return ((val>>24) \| ((val>>8)&0xFF00) \|
178	((val<<8)&0xFF0000) \| (val<<24));
179	}
180
181	int ext2fs_test_generic_bitmap(ext2fs_generic_bitmap bitmap,
182	blk_t bitno);
183
184	int ext2fs_test_generic_bitmap(ext2fs_generic_bitmap bitmap,
185	blk_t bitno)
186	{
187	if ((bitno < bitmap->start) \|\| (bitno > bitmap->end)) {
188	ext2fs_warn_bitmap2(bitmap, EXT2FS_TEST_ERROR, bitno);
189	return 0;
190	}
191	return ext2fs_test_bit(bitno - bitmap->start, bitmap->bitmap);
192	}
193
194	int ext2fs_mark_block_bitmap(ext2fs_block_bitmap bitmap,
195	blk_t block)
196	{
197	return ext2fs_mark_generic_bitmap((ext2fs_generic_bitmap)
198	bitmap,
199	block);
200	}
201
202	int ext2fs_unmark_block_bitmap(ext2fs_block_bitmap bitmap,
203	blk_t block)
204	{
205	return ext2fs_unmark_generic_bitmap((ext2fs_generic_bitmap) bitmap,
206	block);
207	}
208
209	int ext2fs_test_block_bitmap(ext2fs_block_bitmap bitmap,
210	blk_t block)
211	{
212	return ext2fs_test_generic_bitmap((ext2fs_generic_bitmap) bitmap,
213	block);
214	}
215
216	int ext2fs_mark_inode_bitmap(ext2fs_inode_bitmap bitmap,
217	ext2_ino_t inode)
218	{
219	return ext2fs_mark_generic_bitmap((ext2fs_generic_bitmap) bitmap,
220	inode);
221	}
222
223	int ext2fs_unmark_inode_bitmap(ext2fs_inode_bitmap bitmap,
224	ext2_ino_t inode)
225	{
226	return ext2fs_unmark_generic_bitmap((ext2fs_generic_bitmap) bitmap,
227	inode);
228	}
229
230	int ext2fs_test_inode_bitmap(ext2fs_inode_bitmap bitmap,
231	ext2_ino_t inode)
232	{
233	return ext2fs_test_generic_bitmap((ext2fs_generic_bitmap) bitmap,
234	inode);
235	}
236
237	void ext2fs_fast_mark_block_bitmap(ext2fs_block_bitmap bitmap,
238	blk_t block)
239	{
240	ext2fs_set_bit(block - bitmap->start, bitmap->bitmap);
241	}
242
243	void ext2fs_fast_unmark_block_bitmap(ext2fs_block_bitmap bitmap,
244	blk_t block)
245	{
246	ext2fs_clear_bit(block - bitmap->start, bitmap->bitmap);
247	}
248
249	int ext2fs_fast_test_block_bitmap(ext2fs_block_bitmap bitmap,
250	blk_t block)
251	{
252	return ext2fs_test_bit(block - bitmap->start, bitmap->bitmap);
253	}
254
255	void ext2fs_fast_mark_inode_bitmap(ext2fs_inode_bitmap bitmap,
256	ext2_ino_t inode)
257	{
258	ext2fs_set_bit(inode - bitmap->start, bitmap->bitmap);
259	}
260
261	void ext2fs_fast_unmark_inode_bitmap(ext2fs_inode_bitmap bitmap,
262	ext2_ino_t inode)
263	{
264	ext2fs_clear_bit(inode - bitmap->start, bitmap->bitmap);
265	}
266
267	int ext2fs_fast_test_inode_bitmap(ext2fs_inode_bitmap bitmap,
268	ext2_ino_t inode)
269	{
270	return ext2fs_test_bit(inode - bitmap->start, bitmap->bitmap);
271	}
272
273	blk_t ext2fs_get_block_bitmap_start(ext2fs_block_bitmap bitmap)
274	{
275	return bitmap->start;
276	}
277
278	ext2_ino_t ext2fs_get_inode_bitmap_start(ext2fs_inode_bitmap bitmap)
279	{
280	return bitmap->start;
281	}
282
283	blk_t ext2fs_get_block_bitmap_end(ext2fs_block_bitmap bitmap)
284	{
285	return bitmap->end;
286	}
287
288	ext2_ino_t ext2fs_get_inode_bitmap_end(ext2fs_inode_bitmap bitmap)
289	{
290	return bitmap->end;
291	}
292
293	int ext2fs_test_block_bitmap_range(ext2fs_block_bitmap bitmap,
294	blk_t block, int num)
295	{
296	int i;
297
298	if ((block < bitmap->start) \|\| (block+num-1 > bitmap->end)) {
299	ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_TEST,
300	block, bitmap->description);
301	return 0;
302	}
303	for (i=0; i < num; i++) {
304	if (ext2fs_fast_test_block_bitmap(bitmap, block+i))
305	return 0;
306	}
307	return 1;
308	}
309
310	int ext2fs_fast_test_block_bitmap_range(ext2fs_block_bitmap bitmap,
311	blk_t block, int num)
312	{
313	int i;
314
315	for (i=0; i < num; i++) {
316	if (ext2fs_fast_test_block_bitmap(bitmap, block+i))
317	return 0;
318	}
319	return 1;
320	}
321
322	void ext2fs_mark_block_bitmap_range(ext2fs_block_bitmap bitmap,
323	blk_t block, int num)
324	{
325	int i;
326
327	if ((block < bitmap->start) \|\| (block+num-1 > bitmap->end)) {
328	ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_MARK, block,
329	bitmap->description);
330	return;
331	}
332	for (i=0; i < num; i++)
333	ext2fs_set_bit(block + i - bitmap->start, bitmap->bitmap);
334	}
335
336	void ext2fs_fast_mark_block_bitmap_range(ext2fs_block_bitmap bitmap,
337	blk_t block, int num)
338	{
339	int i;
340
341	for (i=0; i < num; i++)
342	ext2fs_set_bit(block + i - bitmap->start, bitmap->bitmap);
343	}
344
345	void ext2fs_unmark_block_bitmap_range(ext2fs_block_bitmap bitmap,
346	blk_t block, int num)
347	{
348	int i;
349
350	if ((block < bitmap->start) \|\| (block+num-1 > bitmap->end)) {
351	ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_UNMARK, block,
352	bitmap->description);
353	return;
354	}
355	for (i=0; i < num; i++)
356	ext2fs_clear_bit(block + i - bitmap->start, bitmap->bitmap);
357	}
358
359	void ext2fs_fast_unmark_block_bitmap_range(ext2fs_block_bitmap bitmap,
360	blk_t block, int num)
361	{
362	int i;
363	for (i=0; i < num; i++)
364	ext2fs_clear_bit(block + i - bitmap->start, bitmap->bitmap);
365	}