1 /* 2 * fs/f2fs/inode.c 3 * 4 * Copyright (c) 2012 Samsung Electronics Co., Ltd. 5 * http://www.samsung.com/ 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License version 2 as 9 * published by the Free Software Foundation. 10 */ 11 #include <linux/fs.h> 12 #include <linux/f2fs_fs.h> 13 #include <linux/buffer_head.h> 14 #include <linux/writeback.h> 15 16 #include "f2fs.h" 17 #include "node.h" 18 19 #include <trace/events/f2fs.h> 20 21 void f2fs_set_inode_flags(struct inode *inode) 22 { 23 unsigned int flags = F2FS_I(inode)->i_flags; 24 25 inode->i_flags &= ~(S_SYNC | S_APPEND | S_IMMUTABLE | 26 S_NOATIME | S_DIRSYNC); 27 28 if (flags & FS_SYNC_FL) 29 inode->i_flags |= S_SYNC; 30 if (flags & FS_APPEND_FL) 31 inode->i_flags |= S_APPEND; 32 if (flags & FS_IMMUTABLE_FL) 33 inode->i_flags |= S_IMMUTABLE; 34 if (flags & FS_NOATIME_FL) 35 inode->i_flags |= S_NOATIME; 36 if (flags & FS_DIRSYNC_FL) 37 inode->i_flags |= S_DIRSYNC; 38 } 39 40 static void __get_inode_rdev(struct inode *inode, struct f2fs_inode *ri) 41 { 42 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) || 43 S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) { 44 if (ri->i_addr[0]) 45 inode->i_rdev = old_decode_dev(le32_to_cpu(ri->i_addr[0])); 46 else 47 inode->i_rdev = new_decode_dev(le32_to_cpu(ri->i_addr[1])); 48 } 49 } 50 51 static void __set_inode_rdev(struct inode *inode, struct f2fs_inode *ri) 52 { 53 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { 54 if (old_valid_dev(inode->i_rdev)) { 55 ri->i_addr[0] = cpu_to_le32(old_encode_dev(inode->i_rdev)); 56 ri->i_addr[1] = 0; 57 } else { 58 ri->i_addr[0] = 0; 59 ri->i_addr[1] = cpu_to_le32(new_encode_dev(inode->i_rdev)); 60 ri->i_addr[2] = 0; 61 } 62 } 63 } 64 65 static int do_read_inode(struct inode *inode) 66 { 67 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); 68 struct f2fs_inode_info *fi = F2FS_I(inode); 69 struct page *node_page; 70 struct f2fs_node *rn; 71 struct f2fs_inode *ri; 72 73 /* Check if ino is within scope */ 74 if (check_nid_range(sbi, inode->i_ino)) { 75 f2fs_msg(inode->i_sb, KERN_ERR, "bad inode number: %lu", 76 (unsigned long) inode->i_ino); 77 return -EINVAL; 78 } 79 80 node_page = get_node_page(sbi, inode->i_ino); 81 if (IS_ERR(node_page)) 82 return PTR_ERR(node_page); 83 84 rn = F2FS_NODE(node_page); 85 ri = &(rn->i); 86 87 inode->i_mode = le16_to_cpu(ri->i_mode); 88 i_uid_write(inode, le32_to_cpu(ri->i_uid)); 89 i_gid_write(inode, le32_to_cpu(ri->i_gid)); 90 set_nlink(inode, le32_to_cpu(ri->i_links)); 91 inode->i_size = le64_to_cpu(ri->i_size); 92 inode->i_blocks = le64_to_cpu(ri->i_blocks); 93 94 inode->i_atime.tv_sec = le64_to_cpu(ri->i_atime); 95 inode->i_ctime.tv_sec = le64_to_cpu(ri->i_ctime); 96 inode->i_mtime.tv_sec = le64_to_cpu(ri->i_mtime); 97 inode->i_atime.tv_nsec = le32_to_cpu(ri->i_atime_nsec); 98 inode->i_ctime.tv_nsec = le32_to_cpu(ri->i_ctime_nsec); 99 inode->i_mtime.tv_nsec = le32_to_cpu(ri->i_mtime_nsec); 100 inode->i_generation = le32_to_cpu(ri->i_generation); 101 102 fi->i_current_depth = le32_to_cpu(ri->i_current_depth); 103 fi->i_xattr_nid = le32_to_cpu(ri->i_xattr_nid); 104 fi->i_flags = le32_to_cpu(ri->i_flags); 105 fi->flags = 0; 106 fi->i_advise = ri->i_advise; 107 fi->i_pino = le32_to_cpu(ri->i_pino); 108 109 get_extent_info(&fi->ext, ri->i_ext); 110 get_inline_info(fi, ri); 111 112 /* get rdev by using inline_info */ 113 __get_inode_rdev(inode, ri); 114 115 f2fs_put_page(node_page, 1); 116 return 0; 117 } 118 119 struct inode *f2fs_iget(struct super_block *sb, unsigned long ino) 120 { 121 struct f2fs_sb_info *sbi = F2FS_SB(sb); 122 struct inode *inode; 123 int ret = 0; 124 125 inode = iget_locked(sb, ino); 126 if (!inode) 127 return ERR_PTR(-ENOMEM); 128 129 if (!(inode->i_state & I_NEW)) { 130 trace_f2fs_iget(inode); 131 return inode; 132 } 133 if (ino == F2FS_NODE_INO(sbi) || ino == F2FS_META_INO(sbi)) 134 goto make_now; 135 136 ret = do_read_inode(inode); 137 if (ret) 138 goto bad_inode; 139 make_now: 140 if (ino == F2FS_NODE_INO(sbi)) { 141 inode->i_mapping->a_ops = &f2fs_node_aops; 142 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO); 143 } else if (ino == F2FS_META_INO(sbi)) { 144 inode->i_mapping->a_ops = &f2fs_meta_aops; 145 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO); 146 } else if (S_ISREG(inode->i_mode)) { 147 inode->i_op = &f2fs_file_inode_operations; 148 inode->i_fop = &f2fs_file_operations; 149 inode->i_mapping->a_ops = &f2fs_dblock_aops; 150 } else if (S_ISDIR(inode->i_mode)) { 151 inode->i_op = &f2fs_dir_inode_operations; 152 inode->i_fop = &f2fs_dir_operations; 153 inode->i_mapping->a_ops = &f2fs_dblock_aops; 154 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO); 155 } else if (S_ISLNK(inode->i_mode)) { 156 inode->i_op = &f2fs_symlink_inode_operations; 157 inode->i_mapping->a_ops = &f2fs_dblock_aops; 158 } else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) || 159 S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) { 160 inode->i_op = &f2fs_special_inode_operations; 161 init_special_inode(inode, inode->i_mode, inode->i_rdev); 162 } else { 163 ret = -EIO; 164 goto bad_inode; 165 } 166 unlock_new_inode(inode); 167 trace_f2fs_iget(inode); 168 return inode; 169 170 bad_inode: 171 iget_failed(inode); 172 trace_f2fs_iget_exit(inode, ret); 173 return ERR_PTR(ret); 174 } 175 176 void update_inode(struct inode *inode, struct page *node_page) 177 { 178 struct f2fs_node *rn; 179 struct f2fs_inode *ri; 180 181 f2fs_wait_on_page_writeback(node_page, NODE, false); 182 183 rn = F2FS_NODE(node_page); 184 ri = &(rn->i); 185 186 ri->i_mode = cpu_to_le16(inode->i_mode); 187 ri->i_advise = F2FS_I(inode)->i_advise; 188 ri->i_uid = cpu_to_le32(i_uid_read(inode)); 189 ri->i_gid = cpu_to_le32(i_gid_read(inode)); 190 ri->i_links = cpu_to_le32(inode->i_nlink); 191 ri->i_size = cpu_to_le64(i_size_read(inode)); 192 ri->i_blocks = cpu_to_le64(inode->i_blocks); 193 set_raw_extent(&F2FS_I(inode)->ext, &ri->i_ext); 194 set_raw_inline(F2FS_I(inode), ri); 195 196 ri->i_atime = cpu_to_le64(inode->i_atime.tv_sec); 197 ri->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); 198 ri->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec); 199 ri->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec); 200 ri->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); 201 ri->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec); 202 ri->i_current_depth = cpu_to_le32(F2FS_I(inode)->i_current_depth); 203 ri->i_xattr_nid = cpu_to_le32(F2FS_I(inode)->i_xattr_nid); 204 ri->i_flags = cpu_to_le32(F2FS_I(inode)->i_flags); 205 ri->i_pino = cpu_to_le32(F2FS_I(inode)->i_pino); 206 ri->i_generation = cpu_to_le32(inode->i_generation); 207 208 __set_inode_rdev(inode, ri); 209 set_cold_node(inode, node_page); 210 set_page_dirty(node_page); 211 212 clear_inode_flag(F2FS_I(inode), FI_DIRTY_INODE); 213 } 214 215 int update_inode_page(struct inode *inode) 216 { 217 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); 218 struct page *node_page; 219 220 node_page = get_node_page(sbi, inode->i_ino); 221 if (IS_ERR(node_page)) 222 return PTR_ERR(node_page); 223 224 update_inode(inode, node_page); 225 f2fs_put_page(node_page, 1); 226 return 0; 227 } 228 229 int f2fs_write_inode(struct inode *inode, struct writeback_control *wbc) 230 { 231 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); 232 int ret; 233 234 if (inode->i_ino == F2FS_NODE_INO(sbi) || 235 inode->i_ino == F2FS_META_INO(sbi)) 236 return 0; 237 238 if (!is_inode_flag_set(F2FS_I(inode), FI_DIRTY_INODE)) 239 return 0; 240 241 /* 242 * We need to lock here to prevent from producing dirty node pages 243 * during the urgent cleaning time when runing out of free sections. 244 */ 245 f2fs_lock_op(sbi); 246 ret = update_inode_page(inode); 247 f2fs_unlock_op(sbi); 248 249 if (wbc) 250 f2fs_balance_fs(sbi); 251 252 return ret; 253 } 254 255 /* 256 * Called at the last iput() if i_nlink is zero 257 */ 258 void f2fs_evict_inode(struct inode *inode) 259 { 260 struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); 261 262 trace_f2fs_evict_inode(inode); 263 truncate_inode_pages(&inode->i_data, 0); 264 265 if (inode->i_ino == F2FS_NODE_INO(sbi) || 266 inode->i_ino == F2FS_META_INO(sbi)) 267 goto no_delete; 268 269 f2fs_bug_on(atomic_read(&F2FS_I(inode)->dirty_dents)); 270 remove_dirty_dir_inode(inode); 271 272 if (inode->i_nlink || is_bad_inode(inode)) 273 goto no_delete; 274 275 sb_start_intwrite(inode->i_sb); 276 set_inode_flag(F2FS_I(inode), FI_NO_ALLOC); 277 i_size_write(inode, 0); 278 279 if (F2FS_HAS_BLOCKS(inode)) 280 f2fs_truncate(inode); 281 282 f2fs_lock_op(sbi); 283 remove_inode_page(inode); 284 f2fs_unlock_op(sbi); 285 286 sb_end_intwrite(inode->i_sb); 287 no_delete: 288 clear_inode(inode); 289 } 290