1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
|
/*
* support.c
* Specific support functions
*
* Copyright (C) 1997 Martin von Lwis
* Copyright (C) 1997 Rgis Duchesne
*
*/
#include "types.h"
#include "struct.h"
#include "support.h"
#include <stdarg.h>
#include <linux/malloc.h>
#include <linux/locks.h>
#include "util.h"
#include "inode.h"
#include "macros.h"
static char print_buf[1024];
#ifdef DEBUG
#include "sysctl.h"
/* Debugging output */
void ntfs_debug(int mask, const char *fmt, ...)
{
va_list ap;
/* Filter it with the debugging level required */
if(ntdebug & mask){
va_start(ap,fmt);
strcpy(print_buf, KERN_DEBUG);
vsprintf(print_buf + 3, fmt, ap);
printk(print_buf);
va_end(ap);
}
}
/* Verbose kmalloc */
void *ntfs_malloc(int size)
{
void *ret;
ret = kmalloc(size, GFP_KERNEL);
ntfs_debug(DEBUG_MALLOC, "Allocating %x at %p\n", size, ret);
return ret;
}
/* Verbose kfree() */
void ntfs_free(void *block)
{
ntfs_debug(DEBUG_MALLOC, "Freeing memory at %p\n", block);
kfree(block);
}
#else
void ntfs_debug(int mask, const char *fmt, ...)
{
}
void *ntfs_malloc(int size)
{
return kmalloc(size, GFP_KERNEL);
}
void ntfs_free(void *block)
{
kfree(block);
}
#endif /* DEBUG */
void ntfs_bzero(void *s, int n)
{
memset(s, 0, n);
}
void *ntfs_memcpy(void *dest, const void *src, ntfs_size_t n)
{
return memcpy(dest, src, n);
}
void *ntfs_memmove(void *dest, const void *src, ntfs_size_t n)
{
return memmove(dest, src, n);
}
/* Warn that an error occured */
void ntfs_error(const char *fmt,...)
{
va_list ap;
va_start(ap, fmt);
strcpy(print_buf, KERN_ERR);
vsprintf(print_buf + 3, fmt, ap);
printk(print_buf);
va_end(ap);
}
int ntfs_read_mft_record(ntfs_volume *vol, int mftno, char *buf)
{
int error;
ntfs_io io;
ntfs_debug(DEBUG_OTHER, "read_mft_record %x\n",mftno);
if(mftno==FILE_MFT)
{
ntfs_memcpy(buf,vol->mft,vol->mft_recordsize);
return 0;
}
if(!vol->mft_ino)
{
printk("ntfs:something is terribly wrong here\n");
return ENODATA;
}
io.fn_put=ntfs_put;
io.fn_get=0;
io.param=buf;
io.size=vol->mft_recordsize;
error=ntfs_read_attr(vol->mft_ino,vol->at_data,NULL,
mftno*vol->mft_recordsize,&io);
if(error || (io.size!=vol->mft_recordsize))
{
ntfs_debug(DEBUG_OTHER, "read_mft_record: read %x failed (%d,%d,%d)\n",
mftno,error,io.size,vol->mft_recordsize);
return error?error:ENODATA;
}
ntfs_debug(DEBUG_OTHER, "read_mft_record: finished read %x\n",mftno);
if(!ntfs_check_mft_record(vol,buf))
{
printk("Invalid MFT record for %x\n",mftno);
return EINVAL;
}
ntfs_debug(DEBUG_OTHER, "read_mft_record: Done %x\n",mftno);
return 0;
}
int ntfs_getput_clusters(ntfs_volume *vol, int cluster, ntfs_size_t start_offs,
ntfs_io *buf)
{
struct super_block *sb=NTFS_SB(vol);
struct buffer_head *bh;
ntfs_size_t to_copy;
int length=buf->size;
if(buf->do_read)
ntfs_debug(DEBUG_OTHER, "get_clusters %d %d %d\n",cluster,start_offs,length);
else
ntfs_debug(DEBUG_OTHER, "put_clusters %d %d %d\n",cluster,start_offs,length);
while(length)
{
if(!(bh=bread(sb->s_dev,cluster,vol->clustersize)))
{
ntfs_debug(DEBUG_OTHER, "%s failed\n", buf->do_read?"Reading":"Writing");
return EIO;
}
to_copy=min(vol->clustersize-start_offs,length);
lock_buffer(bh);
if(buf->do_read)
buf->fn_put(buf,bh->b_data+start_offs,to_copy);
else
{
buf->fn_get(bh->b_data+start_offs,buf,to_copy);
mark_buffer_dirty(bh,1);
}
unlock_buffer(bh);
length-=to_copy;
start_offs=0;
cluster++;
brelse(bh);
}
return 0;
}
ntfs_time64_t ntfs_now(void)
{
return ntfs_unixutc2ntutc(CURRENT_TIME);
}
int ntfs_dupuni2map(ntfs_volume *vol, ntfs_u16 *in, int in_len, char **out,
int *out_len)
{
/* Not supported here */
return EINVAL;
}
int ntfs_dupmap2uni(ntfs_volume *vol, char* in, int in_len, ntfs_u16 **out,
int *out_len)
{
/* Not supported here */
return EINVAL;
}
/*
* Local variables:
* c-file-style: "linux"
* End:
*/
|
