| /** |
| * f2fs_format_utils.c |
| * |
| * Copyright (c) 2014 Samsung Electronics Co., Ltd. |
| * http://www.samsung.com/ |
| * |
| * Dual licensed under the GPL or LGPL version 2 licenses. |
| */ |
| #define _LARGEFILE_SOURCE |
| #define _LARGEFILE64_SOURCE |
| #ifndef _GNU_SOURCE |
| #define _GNU_SOURCE |
| #endif |
| |
| #include <stdio.h> |
| #include <unistd.h> |
| #include <sys/ioctl.h> |
| #include <sys/stat.h> |
| #include <fcntl.h> |
| |
| #include "f2fs_fs.h" |
| |
| #ifdef HAVE_LINUX_FS_H |
| #include <linux/fs.h> |
| #endif |
| #ifdef HAVE_LINUX_FALLOC_H |
| #include <linux/falloc.h> |
| #endif |
| |
| int f2fs_trim_device() |
| { |
| unsigned long long range[2]; |
| struct stat stat_buf; |
| |
| if (!config.trim) |
| return 0; |
| |
| range[0] = 0; |
| range[1] = config.total_sectors * config.sector_size; |
| |
| if (fstat(config.fd, &stat_buf) < 0 ) { |
| MSG(1, "\tError: Failed to get the device stat!!!\n"); |
| return -1; |
| } |
| |
| #if defined(WITH_BLKDISCARD) && defined(BLKDISCARD) |
| MSG(0, "Info: Discarding device\n"); |
| if (S_ISREG(stat_buf.st_mode)) { |
| #ifdef FALLOC_FL_PUNCH_HOLE |
| if (fallocate(config.fd, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, |
| range[0], range[1]) < 0) { |
| MSG(0, "Info: fallocate(PUNCH_HOLE|KEEP_SIZE) is failed\n"); |
| } |
| #endif |
| return 0; |
| } else if (S_ISBLK(stat_buf.st_mode)) { |
| if (ioctl(config.fd, BLKDISCARD, &range) < 0) { |
| MSG(0, "Info: This device doesn't support TRIM\n"); |
| } else { |
| MSG(0, "Info: Discarded %lu sectors\n", |
| config.total_sectors); |
| } |
| } else |
| return -1; |
| #endif |
| return 0; |
| } |
| |