1 /* 2 libparted - a library for manipulating disk partitions 3 Copyright (C) 2001, 2007 Free Software Foundation, Inc. 4 5 This program is free software; you can redistribute it and/or modify 6 it under the terms of the GNU General Public License as published by 7 the Free Software Foundation; either version 3 of the License, or 8 (at your option) any later version. 9 10 This program is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 GNU General Public License for more details. 14 15 You should have received a copy of the GNU General Public License 16 along with this program. If not, see <http://www.gnu.org/licenses/>. 17 */ 18 19 #include <config.h> 20 21 #include <parted/parted.h> 22 #include <parted/endian.h> 23 24 #define _JFS_UTILITY 25 #include "jfs_types.h" 26 #include "jfs_superblock.h" 27 28 #define JFS_SUPER_SECTOR 64 29 30 #if ENABLE_NLS 31 # include <libintl.h> 32 # define _(String) dgettext (PACKAGE, String) 33 #else 34 # define _(String) (String) 35 #endif /* ENABLE_NLS */ 36 37 #define JFS_BLOCK_SIZES ((int[2]){512, 0}) 38 39 static PedGeometry* 40 jfs_probe (PedGeometry* geom) 41 { 42 union { 43 struct superblock sb; 44 char bytes[512]; 45 } buf; 46 47 if (geom->length < JFS_SUPER_SECTOR + 1) 48 return NULL; 49 if (!ped_geometry_read (geom, &buf, JFS_SUPER_SECTOR, 1)) 50 return NULL; 51 52 if (strncmp (buf.sb.s_magic, JFS_MAGIC, 4) == 0) { 53 PedSector block_size = PED_LE32_TO_CPU (buf.sb.s_pbsize) / 512; 54 PedSector block_count = PED_LE64_TO_CPU (buf.sb.s_size); 55 56 return ped_geometry_new (geom->dev, geom->start, 57 block_size * block_count); 58 } else { 59 return NULL; 60 } 61 } 62 63 #ifndef DISCOVER_ONLY 64 static int 65 jfs_clobber (PedGeometry* geom) 66 { 67 char buf[512]; 68 69 memset (buf, 0, 512); 70 return ped_geometry_write (geom, buf, JFS_SUPER_SECTOR, 1); 71 } 72 #endif /* !DISCOVER_ONLY */ 73 74 static PedFileSystemOps jfs_ops = { 75 .probe = jfs_probe, 76 #ifndef DISCOVER_ONLY 77 .clobber = jfs_clobber, 78 #else 79 .clobber = NULL, 80 #endif 81 .open = NULL, 82 .create = NULL, 83 .close = NULL, 84 .check = NULL, 85 .copy = NULL, 86 .resize = NULL, 87 .get_create_constraint = NULL, 88 .get_resize_constraint = NULL, 89 .get_copy_constraint = NULL 90 }; 91 92 static PedFileSystemType jfs_type = { 93 .next = NULL, 94 .ops = &jfs_ops, 95 .name = "jfs", 96 .block_sizes = JFS_BLOCK_SIZES 97 }; 98 99 void 100 ped_file_system_jfs_init () 101 { 102 ped_file_system_type_register (&jfs_type); 103 } 104 105 void 106 ped_file_system_jfs_done () 107 { 108 ped_file_system_type_unregister (&jfs_type); 109 }