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3.7.1
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include
net
netfilter
xt_log.h
Go to the documentation of this file.
1
#define S_SIZE (1024 - (sizeof(unsigned int) + 1))
2
3
struct
sbuff
{
4
unsigned
int
count
;
5
char
buf
[
S_SIZE
+ 1];
6
};
7
static
struct
sbuff
emergency, *emergency_ptr = &emergency;
8
9
static
__printf
(2, 3)
int
sb_add(
struct
sbuff
*
m
,
const
char
*
f
, ...)
10
{
11
va_list
args
;
12
int
len
;
13
14
if
(
likely
(m->count <
S_SIZE
)) {
15
va_start
(args, f);
16
len =
vsnprintf
(m->buf + m->count,
S_SIZE
- m->count, f, args);
17
va_end
(args);
18
if
(
likely
(m->count + len <
S_SIZE
)) {
19
m->count += len;
20
return
0;
21
}
22
}
23
m->count =
S_SIZE
;
24
printk_once
(
KERN_ERR
KBUILD_MODNAME
" please increase S_SIZE\n"
);
25
return
-1;
26
}
27
28
static
struct
sbuff
*sb_open(
void
)
29
{
30
struct
sbuff
*m =
kmalloc
(
sizeof
(*m),
GFP_ATOMIC
);
31
32
if
(
unlikely
(!m)) {
33
local_bh_disable
();
34
do
{
35
m =
xchg
(&emergency_ptr,
NULL
);
36
}
while
(!m);
37
}
38
m->
count
= 0;
39
return
m
;
40
}
41
42
static
void
sb_close(
struct
sbuff
*m)
43
{
44
m->
buf
[m->
count
] = 0;
45
printk
(
"%s\n"
, m->
buf
);
46
47
if
(
likely
(m != &emergency))
48
kfree
(m);
49
else
{
50
emergency_ptr =
m
;
51
local_bh_enable
();
52
}
53
}
54
Generated on Thu Jan 10 2013 14:53:12 for Linux Kernel by
1.8.2