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 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
