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
|
/* vi: set sw=4 ts=4: */
/*
* fstrim.c - discard the part (or whole) of mounted filesystem.
*
* 03 March 2012 - Malek Degachi <malek-degachi@laposte.net>
* Adapted for busybox from util-linux-2.12a.
*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
//usage:#define fstrim_trivial_usage
//usage: "[Options] <mountpoint>"
//usage:#define fstrim_full_usage "\n\n"
//usage: "Options:"
//usage: IF_LONG_OPTS(
//usage: "\n -o,--offset=offset offset in bytes to discard from"
//usage: "\n -l,--length=length length of bytes to discard from the offset"
//usage: "\n -m,--minimum=minimum minimum extent length to discard"
//usage: "\n -v,--verbose print number of discarded bytes"
//usage: )
//usage: IF_NOT_LONG_OPTS(
//usage: "\n -o offset offset in bytes to discard from"
//usage: "\n -l length length of bytes to discard from the offset"
//usage: "\n -m minimum minimum extent length to discard"
//usage: "\n -v, print number of discarded bytes"
//usage: )
#include "libbb.h"
#include <linux/fs.h>
#ifndef FITRIM
struct fstrim_range {
uint64_t start;
uint64_t len;
uint64_t minlen;
};
#define FITRIM _IOWR('X', 121, struct fstrim_range)
#endif
static const struct suffix_mult fstrim_sfx[] = {
{ "KiB", 1024 },
{ "kiB", 1024 },
{ "K", 1024 },
{ "k", 1024 },
{ "MiB", 1048576 },
{ "miB", 1048576 },
{ "M", 1048576 },
{ "m", 1048576 },
{ "GiB", 1073741824 },
{ "giB", 1073741824 },
{ "G", 1073741824 },
{ "g", 1073741824 },
{ "KB", 1000 },
{ "MB", 1000000 },
{ "GB", 1000000000 },
{ "", 0 }
};
int fstrim_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int fstrim_main(int argc UNUSED_PARAM, char **argv)
{
struct fstrim_range range;
char *arg_o;
char *arg_l;
char *arg_m;
unsigned opts;
int fd;
enum {
OPT_o = (1 << 0),
OPT_l = (1 << 1),
OPT_m = (1 << 2),
OPT_v = (1 << 3),
};
#if ENABLE_LONG_OPTS
static const char getopt_longopts[] ALIGN1 =
"offset\0" Required_argument "o"
"length\0" Required_argument "l"
"minimum\0" Required_argument "m"
"verbose\0" No_argument "v"
;
applet_long_options = getopt_longopts;
#endif
opt_complementary = "=1"; /* exactly one non-option arg: the mountpoint */
opts = getopt32(argv, "o:l:m:v", &arg_o, &arg_l, &arg_m);
memset(&range, 0, sizeof(range));
range.len = ULLONG_MAX;
if (opts & OPT_o)
range.start = xatoull_sfx(arg_o, fstrim_sfx);
if (opts & OPT_l)
range.len = xatoull_sfx(arg_l, fstrim_sfx);
if (opts & OPT_m)
range.minlen = xatoull_sfx(arg_m, fstrim_sfx);
if (find_block_device(argv[optind])) {
fd = xopen_nonblocking(argv[optind]);
xioctl(fd, FITRIM, &range);
if (ENABLE_FEATURE_CLEAN_UP)
close(fd);
if (opts & OPT_v)
printf("%s: %llu bytes were trimmed\n", argv[optind], range.len);
}
return EXIT_SUCCESS;
}
|
