1 /**
2 * f2fs_format_utils.c
3 *
4 * Copyright (c) 2014 Samsung Electronics Co., Ltd.
5 * http://www.samsung.com/
6 *
7 * Dual licensed under the GPL or LGPL version 2 licenses.
8 */
9 #define _LARGEFILE_SOURCE
10 #define _LARGEFILE64_SOURCE
11 #ifndef _GNU_SOURCE
12 #define _GNU_SOURCE
13 #endif
14
15 #include <stdio.h>
16 #include <unistd.h>
17 #include <sys/ioctl.h>
18 #include <sys/stat.h>
19 #include <fcntl.h>
20
21 #include "f2fs_fs.h"
22
23 #ifdef HAVE_LINUX_FS_H
24 #include <linux/fs.h>
25 #endif
26 #ifdef HAVE_LINUX_FALLOC_H
27 #include <linux/falloc.h>
28 #endif
29
f2fs_trim_device()30 int f2fs_trim_device()
31 {
32 unsigned long long range[2];
33 struct stat stat_buf;
34
35 if (!config.trim)
36 return 0;
37
38 range[0] = 0;
39 range[1] = config.total_sectors * config.sector_size;
40
41 if (fstat(config.fd, &stat_buf) < 0 ) {
42 MSG(1, "\tError: Failed to get the device stat!!!\n");
43 return -1;
44 }
45
46 #if defined(WITH_BLKDISCARD) && defined(BLKDISCARD)
47 MSG(0, "Info: Discarding device\n");
48 if (S_ISREG(stat_buf.st_mode)) {
49 #ifdef FALLOC_FL_PUNCH_HOLE
50 if (fallocate(config.fd, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE,
51 range[0], range[1]) < 0) {
52 MSG(0, "Info: fallocate(PUNCH_HOLE|KEEP_SIZE) is failed\n");
53 }
54 #endif
55 return 0;
56 } else if (S_ISBLK(stat_buf.st_mode)) {
57 if (ioctl(config.fd, BLKDISCARD, &range) < 0) {
58 MSG(0, "Info: This device doesn't support TRIM\n");
59 } else {
60 MSG(0, "Info: Discarded %lu sectors\n",
61 config.total_sectors);
62 }
63 } else
64 return -1;
65 #endif
66 return 0;
67 }
68
69