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 int __recover_inline_status(struct inode *inode, struct page *ipage) 71 { 72 void *inline_data = inline_data_addr(ipage); 73 struct f2fs_inode *ri; 74 void *zbuf; 75 76 zbuf = kzalloc(MAX_INLINE_DATA, GFP_NOFS); 77 if (!zbuf) 78 return -ENOMEM; 79 80 if (!memcmp(zbuf, inline_data, MAX_INLINE_DATA)) { 81 kfree(zbuf); 82 return 0; 83 } 84 kfree(zbuf); 85 86 f2fs_wait_on_page_writeback(ipage, NODE); 87 set_inode_flag(F2FS_I(inode), FI_DATA_EXIST); 88 89 ri = F2FS_INODE(ipage); 90 set_raw_inline(F2FS_I(inode), ri); 91 set_page_dirty(ipage); 92 return 0; 93 } 94 95 static int do_read_inode(struct inode *inode) 96 { 97 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 98 struct f2fs_inode_info *fi = F2FS_I(inode); 99 struct page *node_page; 100 struct f2fs_inode *ri; 101 int err = 0; 102 103 /* Check if ino is within scope */ 104 if (check_nid_range(sbi, inode->i_ino)) { 105 f2fs_msg(inode->i_sb, KERN_ERR, "bad inode number: %lu", 106 (unsigned long) inode->i_ino); 107 WARN_ON(1); 108 return -EINVAL; 109 } 110 111 node_page = get_node_page(sbi, inode->i_ino); 112 if (IS_ERR(node_page)) 113 return PTR_ERR(node_page); 114 115 ri = F2FS_INODE(node_page); 116 117 inode->i_mode = le16_to_cpu(ri->i_mode); 118 i_uid_write(inode, le32_to_cpu(ri->i_uid)); 119 i_gid_write(inode, le32_to_cpu(ri->i_gid)); 120 set_nlink(inode, le32_to_cpu(ri->i_links)); 121 inode->i_size = le64_to_cpu(ri->i_size); 122 inode->i_blocks = le64_to_cpu(ri->i_blocks); 123 124 inode->i_atime.tv_sec = le64_to_cpu(ri->i_atime); 125 inode->i_ctime.tv_sec = le64_to_cpu(ri->i_ctime); 126 inode->i_mtime.tv_sec = le64_to_cpu(ri->i_mtime); 127 inode->i_atime.tv_nsec = le32_to_cpu(ri->i_atime_nsec); 128 inode->i_ctime.tv_nsec = le32_to_cpu(ri->i_ctime_nsec); 129 inode->i_mtime.tv_nsec = le32_to_cpu(ri->i_mtime_nsec); 130 inode->i_generation = le32_to_cpu(ri->i_generation); 131 132 fi->i_current_depth = le32_to_cpu(ri->i_current_depth); 133 fi->i_xattr_nid = le32_to_cpu(ri->i_xattr_nid); 134 fi->i_flags = le32_to_cpu(ri->i_flags); 135 fi->flags = 0; 136 fi->i_advise = ri->i_advise; 137 fi->i_pino = le32_to_cpu(ri->i_pino); 138 fi->i_dir_level = ri->i_dir_level; 139 140 get_extent_info(&fi->ext, ri->i_ext); 141 get_inline_info(fi, ri); 142 143 /* check data exist */ 144 if (f2fs_has_inline_data(inode) && !f2fs_exist_data(inode)) 145 err = __recover_inline_status(inode, node_page); 146 147 /* get rdev by using inline_info */ 148 __get_inode_rdev(inode, ri); 149 150 f2fs_put_page(node_page, 1); 151 152 stat_inc_inline_inode(inode); 153 stat_inc_inline_dir(inode); 154 155 return err; 156 } 157 158 struct inode *f2fs_iget(struct super_block *sb, unsigned long ino) 159 { 160 struct f2fs_sb_info *sbi = F2FS_SB(sb); 161 struct inode *inode; 162 int ret = 0; 163 164 inode = iget_locked(sb, ino); 165 if (!inode) 166 return ERR_PTR(-ENOMEM); 167 168 if (!(inode->i_state & I_NEW)) { 169 trace_f2fs_iget(inode); 170 return inode; 171 } 172 if (ino == F2FS_NODE_INO(sbi) || ino == F2FS_META_INO(sbi)) 173 goto make_now; 174 175 ret = do_read_inode(inode); 176 if (ret) 177 goto bad_inode; 178 make_now: 179 if (ino == F2FS_NODE_INO(sbi)) { 180 inode->i_mapping->a_ops = &f2fs_node_aops; 181 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO); 182 } else if (ino == F2FS_META_INO(sbi)) { 183 inode->i_mapping->a_ops = &f2fs_meta_aops; 184 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO); 185 } else if (S_ISREG(inode->i_mode)) { 186 inode->i_op = &f2fs_file_inode_operations; 187 inode->i_fop = &f2fs_file_operations; 188 inode->i_mapping->a_ops = &f2fs_dblock_aops; 189 } else if (S_ISDIR(inode->i_mode)) { 190 inode->i_op = &f2fs_dir_inode_operations; 191 inode->i_fop = &f2fs_dir_operations; 192 inode->i_mapping->a_ops = &f2fs_dblock_aops; 193 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO); 194 } else if (S_ISLNK(inode->i_mode)) { 195 inode->i_op = &f2fs_symlink_inode_operations; 196 inode->i_mapping->a_ops = &f2fs_dblock_aops; 197 } else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) || 198 S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) { 199 inode->i_op = &f2fs_special_inode_operations; 200 init_special_inode(inode, inode->i_mode, inode->i_rdev); 201 } else { 202 ret = -EIO; 203 goto bad_inode; 204 } 205 unlock_new_inode(inode); 206 trace_f2fs_iget(inode); 207 return inode; 208 209 bad_inode: 210 iget_failed(inode); 211 trace_f2fs_iget_exit(inode, ret); 212 return ERR_PTR(ret); 213 } 214 215 void update_inode(struct inode *inode, struct page *node_page) 216 { 217 struct f2fs_inode *ri; 218 219 f2fs_wait_on_page_writeback(node_page, NODE); 220 221 ri = F2FS_INODE(node_page); 222 223 ri->i_mode = cpu_to_le16(inode->i_mode); 224 ri->i_advise = F2FS_I(inode)->i_advise; 225 ri->i_uid = cpu_to_le32(i_uid_read(inode)); 226 ri->i_gid = cpu_to_le32(i_gid_read(inode)); 227 ri->i_links = cpu_to_le32(inode->i_nlink); 228 ri->i_size = cpu_to_le64(i_size_read(inode)); 229 ri->i_blocks = cpu_to_le64(inode->i_blocks); 230 set_raw_extent(&F2FS_I(inode)->ext, &ri->i_ext); 231 set_raw_inline(F2FS_I(inode), ri); 232 233 ri->i_atime = cpu_to_le64(inode->i_atime.tv_sec); 234 ri->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); 235 ri->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec); 236 ri->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec); 237 ri->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); 238 ri->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec); 239 ri->i_current_depth = cpu_to_le32(F2FS_I(inode)->i_current_depth); 240 ri->i_xattr_nid = cpu_to_le32(F2FS_I(inode)->i_xattr_nid); 241 ri->i_flags = cpu_to_le32(F2FS_I(inode)->i_flags); 242 ri->i_pino = cpu_to_le32(F2FS_I(inode)->i_pino); 243 ri->i_generation = cpu_to_le32(inode->i_generation); 244 ri->i_dir_level = F2FS_I(inode)->i_dir_level; 245 246 __set_inode_rdev(inode, ri); 247 set_cold_node(inode, node_page); 248 set_page_dirty(node_page); 249 250 clear_inode_flag(F2FS_I(inode), FI_DIRTY_INODE); 251 } 252 253 void update_inode_page(struct inode *inode) 254 { 255 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 256 struct page *node_page; 257 retry: 258 node_page = get_node_page(sbi, inode->i_ino); 259 if (IS_ERR(node_page)) { 260 int err = PTR_ERR(node_page); 261 if (err == -ENOMEM) { 262 cond_resched(); 263 goto retry; 264 } else if (err != -ENOENT) { 265 f2fs_stop_checkpoint(sbi); 266 } 267 return; 268 } 269 update_inode(inode, node_page); 270 f2fs_put_page(node_page, 1); 271 } 272 273 int f2fs_write_inode(struct inode *inode, struct writeback_control *wbc) 274 { 275 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 276 277 if (inode->i_ino == F2FS_NODE_INO(sbi) || 278 inode->i_ino == F2FS_META_INO(sbi)) 279 return 0; 280 281 if (!is_inode_flag_set(F2FS_I(inode), FI_DIRTY_INODE)) 282 return 0; 283 284 /* 285 * We need to lock here to prevent from producing dirty node pages 286 * during the urgent cleaning time when runing out of free sections. 287 */ 288 f2fs_lock_op(sbi); 289 update_inode_page(inode); 290 f2fs_unlock_op(sbi); 291 292 if (wbc) 293 f2fs_balance_fs(sbi); 294 295 return 0; 296 } 297 298 /* 299 * Called at the last iput() if i_nlink is zero 300 */ 301 void f2fs_evict_inode(struct inode *inode) 302 { 303 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 304 nid_t xnid = F2FS_I(inode)->i_xattr_nid; 305 306 /* some remained atomic pages should discarded */ 307 if (f2fs_is_atomic_file(inode) || f2fs_is_volatile_file(inode)) 308 commit_inmem_pages(inode, true); 309 310 trace_f2fs_evict_inode(inode); 311 truncate_inode_pages_final(&inode->i_data); 312 313 if (inode->i_ino == F2FS_NODE_INO(sbi) || 314 inode->i_ino == F2FS_META_INO(sbi)) 315 goto out_clear; 316 317 f2fs_bug_on(sbi, get_dirty_pages(inode)); 318 remove_dirty_dir_inode(inode); 319 320 if (inode->i_nlink || is_bad_inode(inode)) 321 goto no_delete; 322 323 sb_start_intwrite(inode->i_sb); 324 set_inode_flag(F2FS_I(inode), FI_NO_ALLOC); 325 i_size_write(inode, 0); 326 327 if (F2FS_HAS_BLOCKS(inode)) 328 f2fs_truncate(inode); 329 330 f2fs_lock_op(sbi); 331 remove_inode_page(inode); 332 f2fs_unlock_op(sbi); 333 334 sb_end_intwrite(inode->i_sb); 335 no_delete: 336 stat_dec_inline_dir(inode); 337 stat_dec_inline_inode(inode); 338 invalidate_mapping_pages(NODE_MAPPING(sbi), inode->i_ino, inode->i_ino); 339 if (xnid) 340 invalidate_mapping_pages(NODE_MAPPING(sbi), xnid, xnid); 341 if (is_inode_flag_set(F2FS_I(inode), FI_APPEND_WRITE)) 342 add_dirty_inode(sbi, inode->i_ino, APPEND_INO); 343 if (is_inode_flag_set(F2FS_I(inode), FI_UPDATE_WRITE)) 344 add_dirty_inode(sbi, inode->i_ino, UPDATE_INO); 345 out_clear: 346 clear_inode(inode); 347 } 348 349 /* caller should call f2fs_lock_op() */ 350 void handle_failed_inode(struct inode *inode) 351 { 352 struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 353 354 clear_nlink(inode); 355 make_bad_inode(inode); 356 unlock_new_inode(inode); 357 358 i_size_write(inode, 0); 359 if (F2FS_HAS_BLOCKS(inode)) 360 f2fs_truncate(inode); 361 362 remove_inode_page(inode); 363 364 clear_inode_flag(F2FS_I(inode), FI_INLINE_DATA); 365 clear_inode_flag(F2FS_I(inode), FI_INLINE_DENTRY); 366 alloc_nid_failed(sbi, inode->i_ino); 367 f2fs_unlock_op(sbi); 368 369 /* iput will drop the inode object */ 370 iput(inode); 371 } 372