1 /* 2 * Copyright (C) 2014 The Android Open Source Project 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the 13 * distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #define _LARGEFILE64_SOURCE 30 31 #include <fcntl.h> 32 #include <dlfcn.h> 33 34 #include <f2fs_fs.h> 35 #include <f2fs_format_utils.h> 36 37 #include <sparse/sparse.h> 38 39 struct selabel_handle; 40 41 #include "make_f2fs.h" 42 43 extern void flush_sparse_buffs(); 44 45 struct f2fs_configuration config; 46 struct sparse_file *f2fs_sparse_file; 47 extern int dlopenf2fs(); 48 49 static void reset_f2fs_info() { 50 // Reset all the global data structures used by make_f2fs so it 51 // can be called again. 52 memset(&config, 0, sizeof(config)); 53 config.fd = -1; 54 if (f2fs_sparse_file) { 55 sparse_file_destroy(f2fs_sparse_file); 56 f2fs_sparse_file = NULL; 57 } 58 } 59 60 int make_f2fs_sparse_fd(int fd, long long len, 61 const char *mountpoint, struct selabel_handle *sehnd) 62 { 63 if (dlopenf2fs() < 0) { 64 return -1; 65 } 66 reset_f2fs_info(); 67 f2fs_init_configuration(&config); 68 len &= ~((__u64)F2FS_BLKSIZE); 69 config.total_sectors = len / config.sector_size; 70 config.start_sector = 0; 71 f2fs_sparse_file = sparse_file_new(F2FS_BLKSIZE, len); 72 f2fs_format_device(); 73 sparse_file_write(f2fs_sparse_file, fd, /*gzip*/0, /*sparse*/1, /*crc*/0); 74 sparse_file_destroy(f2fs_sparse_file); 75 flush_sparse_buffs(); 76 f2fs_sparse_file = NULL; 77 return 0; 78 } 79
