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 _LARGEFILE64_SOURCE 10 11 #include <stdio.h> 12 #include <unistd.h> 13 #include <sys/ioctl.h> 14 #include <sys/stat.h> 15 16 #include "f2fs_fs.h" 17 18 #ifdef HAVE_LINUX_FS_H 19 #include <linux/fs.h> 20 #endif 21 f2fs_trim_device()22int f2fs_trim_device() 23 { 24 unsigned long long range[2]; 25 struct stat stat_buf; 26 27 if (!config.trim) 28 return 0; 29 30 range[0] = 0; 31 range[1] = config.total_sectors * DEFAULT_SECTOR_SIZE; 32 33 if (fstat(config.fd, &stat_buf) < 0 ) { 34 MSG(1, "\tError: Failed to get the device stat!!!\n"); 35 return -1; 36 } 37 38 #if defined(WITH_BLKDISCARD) && defined(BLKDISCARD) 39 MSG(0, "Info: Discarding device\n"); 40 if (S_ISREG(stat_buf.st_mode)) 41 return 0; 42 else if (S_ISBLK(stat_buf.st_mode)) { 43 if (ioctl(config.fd, BLKDISCARD, &range) < 0) { 44 MSG(0, "Info: This device doesn't support TRIM\n"); 45 } else { 46 MSG(0, "Info: Discarded %lu sectors\n", 47 config.total_sectors); 48 } 49 } else 50 return -1; 51 #endif 52 return 0; 53 } 54 55