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 #include <linux/bitops.h> 16 17 #include "f2fs.h" 18 #include "node.h" 19 20 #include <trace/events/f2fs.h> 21 22 void f2fs_set_inode_flags(struct inode *inode) 23 { 24 unsigned int flags = F2FS_I(inode)->i_flags; 25 unsigned int new_fl = 0; 26 27 if (flags & FS_SYNC_FL) 28 new_fl |= S_SYNC; 29 if (flags & FS_APPEND_FL) 30 new_fl |= S_APPEND; 31 if (flags & FS_IMMUTABLE_FL) 32 new_fl |= S_IMMUTABLE; 33 if (flags & FS_NOATIME_FL) 34 new_fl |= S_NOATIME; 35 if (flags & FS_DIRSYNC_FL) 36 new_fl |= S_DIRSYNC; 37 set_mask_bits(&inode->i_flags, 38 S_SYNC|S_APPEND|S_IMMUTABLE|S_NOATIME|S_DIRSYNC, new_fl); 39 } 40 41 static void __get_inode_rdev(struct inode *inode, struct f2fs_inode *ri) 42 { 43 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) || 44 S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) { 45 if (ri->i_addr[0]) 46 inode->i_rdev = 47 old_decode_dev(le32_to_cpu(ri->i_addr[0])); 48 else 49 inode->i_rdev = 50 new_decode_dev(le32_to_cpu(ri->i_addr[1])); 51 } 52 } 53 54 static void __set_inode_rdev(struct inode *inode, struct f2fs_inode *ri) 55 { 56 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { 57 if (old_valid_dev(inode->i_rdev)) { 58 ri->i_addr[0] = 59 cpu_to_le32(old_encode_dev(inode->i_rdev)); 60 ri->i_addr[1] = 0; 61 } else { 62 ri->i_addr[0] = 0; 63 ri->i_addr[1] = 64 cpu_to_le32(new_encode_dev(inode->i_rdev)); 65 ri->i_addr[2] = 0; 66 } 67 } 68 } 69 70 static void __recover_inline_status(struct inode *inode, struct page *ipage) 71 { 72 void *inline_data = inline_data_addr(ipage); 73 __le32 *start = inline_data; 74 __le32 *end = start + MAX_INLINE_DATA / sizeof(__le32); 75 76 while (start < end) { 77 if (*start++) { 78 f2fs_wait_on_page_writeback(ipage, NODE); 79 80 set_inode_flag(F2FS_I(inode), FI_DATA_EXIST); 81 set_raw_inline(F2FS_I(inode), F2FS_INODE(ipage)); 82 set_page_dirty(ipage); 83 return; 84 } 85 } 86 return; 87 } 88 89 static int do_read_inode(struct inode *inode) 90 { 91 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 92 struct f2fs_inode_info *fi = F2FS_I(inode); 93 struct page *node_page; 94 struct f2fs_inode *ri; 95 96 /* Check if ino is within scope */ 97 if (check_nid_range(sbi, inode->i_ino)) { 98 f2fs_msg(inode->i_sb, KERN_ERR, "bad inode number: %lu", 99 (unsigned long) inode->i_ino); 100 WARN_ON(1); 101 return -EINVAL; 102 } 103 104 node_page = get_node_page(sbi, inode->i_ino); 105 if (IS_ERR(node_page)) 106 return PTR_ERR(node_page); 107 108 ri = F2FS_INODE(node_page); 109 110 inode->i_mode = le16_to_cpu(ri->i_mode); 111 i_uid_write(inode, le32_to_cpu(ri->i_uid)); 112 i_gid_write(inode, le32_to_cpu(ri->i_gid)); 113 set_nlink(inode, le32_to_cpu(ri->i_links)); 114 inode->i_size = le64_to_cpu(ri->i_size); 115 inode->i_blocks = le64_to_cpu(ri->i_blocks); 116 117 inode->i_atime.tv_sec = le64_to_cpu(ri->i_atime); 118 inode->i_ctime.tv_sec = le64_to_cpu(ri->i_ctime); 119 inode->i_mtime.tv_sec = le64_to_cpu(ri->i_mtime); 120 inode->i_atime.tv_nsec = le32_to_cpu(ri->i_atime_nsec); 121 inode->i_ctime.tv_nsec = le32_to_cpu(ri->i_ctime_nsec); 122 inode->i_mtime.tv_nsec = le32_to_cpu(ri->i_mtime_nsec); 123 inode->i_generation = le32_to_cpu(ri->i_generation); 124 125 fi->i_current_depth = le32_to_cpu(ri->i_current_depth); 126 fi->i_xattr_nid = le32_to_cpu(ri->i_xattr_nid); 127 fi->i_flags = le32_to_cpu(ri->i_flags); 128 fi->flags = 0; 129 fi->i_advise = ri->i_advise; 130 fi->i_pino = le32_to_cpu(ri->i_pino); 131 fi->i_dir_level = ri->i_dir_level; 132 133 get_extent_info(&fi->ext, ri->i_ext); 134 get_inline_info(fi, ri); 135 136 /* check data exist */ 137 if (f2fs_has_inline_data(inode) && !f2fs_exist_data(inode)) 138 __recover_inline_status(inode, node_page); 139 140 /* get rdev by using inline_info */ 141 __get_inode_rdev(inode, ri); 142 143 f2fs_put_page(node_page, 1); 144 145 stat_inc_inline_inode(inode); 146 stat_inc_inline_dir(inode); 147 148 return 0; 149 } 150 151 struct inode *f2fs_iget(struct super_block *sb, unsigned long ino) 152 { 153 struct f2fs_sb_info *sbi = F2FS_SB(sb); 154 struct inode *inode; 155 int ret = 0; 156 157 inode = iget_locked(sb, ino); 158 if (!inode) 159 return ERR_PTR(-ENOMEM); 160 161 if (!(inode->i_state & I_NEW)) { 162 trace_f2fs_iget(inode); 163 return inode; 164 } 165 if (ino == F2FS_NODE_INO(sbi) || ino == F2FS_META_INO(sbi)) 166 goto make_now; 167 168 ret = do_read_inode(inode); 169 if (ret) 170 goto bad_inode; 171 make_now: 172 if (ino == F2FS_NODE_INO(sbi)) { 173 inode->i_mapping->a_ops = &f2fs_node_aops; 174 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO); 175 } else if (ino == F2FS_META_INO(sbi)) { 176 inode->i_mapping->a_ops = &f2fs_meta_aops; 177 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO); 178 } else if (S_ISREG(inode->i_mode)) { 179 inode->i_op = &f2fs_file_inode_operations; 180 inode->i_fop = &f2fs_file_operations; 181 inode->i_mapping->a_ops = &f2fs_dblock_aops; 182 } else if (S_ISDIR(inode->i_mode)) { 183 inode->i_op = &f2fs_dir_inode_operations; 184 inode->i_fop = &f2fs_dir_operations; 185 inode->i_mapping->a_ops = &f2fs_dblock_aops; 186 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO); 187 } else if (S_ISLNK(inode->i_mode)) { 188 inode->i_op = &f2fs_symlink_inode_operations; 189 inode->i_mapping->a_ops = &f2fs_dblock_aops; 190 } else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) || 191 S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) { 192 inode->i_op = &f2fs_special_inode_operations; 193 init_special_inode(inode, inode->i_mode, inode->i_rdev); 194 } else { 195 ret = -EIO; 196 goto bad_inode; 197 } 198 unlock_new_inode(inode); 199 trace_f2fs_iget(inode); 200 return inode; 201 202 bad_inode: 203 iget_failed(inode); 204 trace_f2fs_iget_exit(inode, ret); 205 return ERR_PTR(ret); 206 } 207 208 void update_inode(struct inode *inode, struct page *node_page) 209 { 210 struct f2fs_inode *ri; 211 212 f2fs_wait_on_page_writeback(node_page, NODE); 213 214 ri = F2FS_INODE(node_page); 215 216 ri->i_mode = cpu_to_le16(inode->i_mode); 217 ri->i_advise = F2FS_I(inode)->i_advise; 218 ri->i_uid = cpu_to_le32(i_uid_read(inode)); 219 ri->i_gid = cpu_to_le32(i_gid_read(inode)); 220 ri->i_links = cpu_to_le32(inode->i_nlink); 221 ri->i_size = cpu_to_le64(i_size_read(inode)); 222 ri->i_blocks = cpu_to_le64(inode->i_blocks); 223 set_raw_extent(&F2FS_I(inode)->ext, &ri->i_ext); 224 set_raw_inline(F2FS_I(inode), ri); 225 226 ri->i_atime = cpu_to_le64(inode->i_atime.tv_sec); 227 ri->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); 228 ri->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec); 229 ri->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec); 230 ri->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); 231 ri->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec); 232 ri->i_current_depth = cpu_to_le32(F2FS_I(inode)->i_current_depth); 233 ri->i_xattr_nid = cpu_to_le32(F2FS_I(inode)->i_xattr_nid); 234 ri->i_flags = cpu_to_le32(F2FS_I(inode)->i_flags); 235 ri->i_pino = cpu_to_le32(F2FS_I(inode)->i_pino); 236 ri->i_generation = cpu_to_le32(inode->i_generation); 237 ri->i_dir_level = F2FS_I(inode)->i_dir_level; 238 239 __set_inode_rdev(inode, ri); 240 set_cold_node(inode, node_page); 241 set_page_dirty(node_page); 242 243 clear_inode_flag(F2FS_I(inode), FI_DIRTY_INODE); 244 } 245 246 void update_inode_page(struct inode *inode) 247 { 248 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 249 struct page *node_page; 250 retry: 251 node_page = get_node_page(sbi, inode->i_ino); 252 if (IS_ERR(node_page)) { 253 int err = PTR_ERR(node_page); 254 if (err == -ENOMEM) { 255 cond_resched(); 256 goto retry; 257 } else if (err != -ENOENT) { 258 f2fs_stop_checkpoint(sbi); 259 } 260 return; 261 } 262 update_inode(inode, node_page); 263 f2fs_put_page(node_page, 1); 264 } 265 266 int f2fs_write_inode(struct inode *inode, struct writeback_control *wbc) 267 { 268 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 269 270 if (inode->i_ino == F2FS_NODE_INO(sbi) || 271 inode->i_ino == F2FS_META_INO(sbi)) 272 return 0; 273 274 if (!is_inode_flag_set(F2FS_I(inode), FI_DIRTY_INODE)) 275 return 0; 276 277 /* 278 * We need to lock here to prevent from producing dirty node pages 279 * during the urgent cleaning time when runing out of free sections. 280 */ 281 f2fs_lock_op(sbi); 282 update_inode_page(inode); 283 f2fs_unlock_op(sbi); 284 285 if (wbc) 286 f2fs_balance_fs(sbi); 287 288 return 0; 289 } 290 291 /* 292 * Called at the last iput() if i_nlink is zero 293 */ 294 void f2fs_evict_inode(struct inode *inode) 295 { 296 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 297 nid_t xnid = F2FS_I(inode)->i_xattr_nid; 298 299 /* some remained atomic pages should discarded */ 300 if (f2fs_is_atomic_file(inode)) 301 commit_inmem_pages(inode, true); 302 303 trace_f2fs_evict_inode(inode); 304 truncate_inode_pages_final(&inode->i_data); 305 306 if (inode->i_ino == F2FS_NODE_INO(sbi) || 307 inode->i_ino == F2FS_META_INO(sbi)) 308 goto out_clear; 309 310 f2fs_bug_on(sbi, get_dirty_pages(inode)); 311 remove_dirty_dir_inode(inode); 312 313 if (inode->i_nlink || is_bad_inode(inode)) 314 goto no_delete; 315 316 sb_start_intwrite(inode->i_sb); 317 set_inode_flag(F2FS_I(inode), FI_NO_ALLOC); 318 i_size_write(inode, 0); 319 320 if (F2FS_HAS_BLOCKS(inode)) 321 f2fs_truncate(inode); 322 323 f2fs_lock_op(sbi); 324 remove_inode_page(inode); 325 f2fs_unlock_op(sbi); 326 327 sb_end_intwrite(inode->i_sb); 328 no_delete: 329 stat_dec_inline_dir(inode); 330 stat_dec_inline_inode(inode); 331 invalidate_mapping_pages(NODE_MAPPING(sbi), inode->i_ino, inode->i_ino); 332 if (xnid) 333 invalidate_mapping_pages(NODE_MAPPING(sbi), xnid, xnid); 334 if (is_inode_flag_set(F2FS_I(inode), FI_APPEND_WRITE)) 335 add_dirty_inode(sbi, inode->i_ino, APPEND_INO); 336 if (is_inode_flag_set(F2FS_I(inode), FI_UPDATE_WRITE)) 337 add_dirty_inode(sbi, inode->i_ino, UPDATE_INO); 338 out_clear: 339 clear_inode(inode); 340 } 341 342 /* caller should call f2fs_lock_op() */ 343 void handle_failed_inode(struct inode *inode) 344 { 345 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 346 347 clear_nlink(inode); 348 make_bad_inode(inode); 349 unlock_new_inode(inode); 350 351 i_size_write(inode, 0); 352 if (F2FS_HAS_BLOCKS(inode)) 353 f2fs_truncate(inode); 354 355 remove_inode_page(inode); 356 357 clear_inode_flag(F2FS_I(inode), FI_INLINE_DATA); 358 clear_inode_flag(F2FS_I(inode), FI_INLINE_DENTRY); 359 alloc_nid_failed(sbi, inode->i_ino); 360 f2fs_unlock_op(sbi); 361 362 /* iput will drop the inode object */ 363 iput(inode); 364 } 365