fs/f2fs/inode.c

   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/backing-dev.h>
  15 #include <linux/writeback.h>
  16
  17 #include "f2fs.h"
  18 #include "node.h"
  19 #include "segment.h"
  20
  21 #include <trace/events/f2fs.h>
  22
  23 void f2fs_mark_inode_dirty_sync(struct inode *inode, bool sync)
  24 {
  25         if (f2fs_inode_dirtied(inode, sync))
  26                 return;
  27
  28         mark_inode_dirty_sync(inode);
  29 }
  30
  31 void f2fs_set_inode_flags(struct inode *inode)
  32 {
  33         unsigned int flags = F2FS_I(inode)->i_flags;
  34         unsigned int new_fl = 0;
  35
  36         if (flags & FS_SYNC_FL)
  37                 new_fl |= S_SYNC;
  38         if (flags & FS_APPEND_FL)
  39                 new_fl |= S_APPEND;
  40         if (flags & FS_IMMUTABLE_FL)
  41                 new_fl |= S_IMMUTABLE;
  42         if (flags & FS_NOATIME_FL)
  43                 new_fl |= S_NOATIME;
  44         if (flags & FS_DIRSYNC_FL)
  45                 new_fl |= S_DIRSYNC;
  46         inode_set_flags(inode, new_fl,
  47                         S_SYNC|S_APPEND|S_IMMUTABLE|S_NOATIME|S_DIRSYNC);
  48 }
  49
  50 static void __get_inode_rdev(struct inode *inode, struct f2fs_inode *ri)
  51 {
  52         int extra_size = get_extra_isize(inode);
  53
  54         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) ||
  55                         S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) {
  56                 if (ri->i_addr[extra_size])
  57                         inode->i_rdev = old_decode_dev(
  58                                 le32_to_cpu(ri->i_addr[extra_size]));
  59                 else
  60                         inode->i_rdev = new_decode_dev(
  61                                 le32_to_cpu(ri->i_addr[extra_size + 1]));
  62         }
  63 }
  64
  65 static bool __written_first_block(struct f2fs_inode *ri)
  66 {
  67         block_t addr = le32_to_cpu(ri->i_addr[offset_in_addr(ri)]);
  68
  69         if (addr != NEW_ADDR && addr != NULL_ADDR)
  70                 return true;
  71         return false;
  72 }
  73
  74 static void __set_inode_rdev(struct inode *inode, struct f2fs_inode *ri)
  75 {
  76         int extra_size = get_extra_isize(inode);
  77
  78         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
  79                 if (old_valid_dev(inode->i_rdev)) {
  80                         ri->i_addr[extra_size] =
  81                                 cpu_to_le32(old_encode_dev(inode->i_rdev));
  82                         ri->i_addr[extra_size + 1] = 0;
  83                 } else {
  84                         ri->i_addr[extra_size] = 0;
  85                         ri->i_addr[extra_size + 1] =
  86                                 cpu_to_le32(new_encode_dev(inode->i_rdev));
  87                         ri->i_addr[extra_size + 2] = 0;
  88                 }
  89         }
  90 }
  91
  92 static void __recover_inline_status(struct inode *inode, struct page *ipage)
  93 {
  94         void *inline_data = inline_data_addr(inode, ipage);
  95         __le32 *start = inline_data;
  96         __le32 *end = start + MAX_INLINE_DATA(inode) / sizeof(__le32);
  97
  98         while (start < end) {
  99                 if (*start++) {
 100                         f2fs_wait_on_page_writeback(ipage, NODE, true);
 101
 102                         set_inode_flag(inode, FI_DATA_EXIST);
 103                         set_raw_inline(inode, F2FS_INODE(ipage));
 104                         set_page_dirty(ipage);
 105                         return;
 106                 }
 107         }
 108         return;
 109 }
 110
 111 static bool f2fs_enable_inode_chksum(struct f2fs_sb_info *sbi, struct page *page)
 112 {
 113         struct f2fs_inode *ri = &F2FS_NODE(page)->i;
 114         int extra_isize = le32_to_cpu(ri->i_extra_isize);
 115
 116         if (!f2fs_sb_has_inode_chksum(sbi->sb))
 117                 return false;
 118
 119         if (!RAW_IS_INODE(F2FS_NODE(page)) || !(ri->i_inline & F2FS_EXTRA_ATTR))
 120                 return false;
 121
 122         if (!F2FS_FITS_IN_INODE(ri, extra_isize, i_inode_checksum))
 123                 return false;
 124
 125         return true;
 126 }
 127
 128 static __u32 f2fs_inode_chksum(struct f2fs_sb_info *sbi, struct page *page)
 129 {
 130         struct f2fs_node *node = F2FS_NODE(page);
 131         struct f2fs_inode *ri = &node->i;
 132         __le32 ino = node->footer.ino;
 133         __le32 gen = ri->i_generation;
 134         __u32 chksum, chksum_seed;
 135         __u32 dummy_cs = 0;
 136         unsigned int offset = offsetof(struct f2fs_inode, i_inode_checksum);
 137         unsigned int cs_size = sizeof(dummy_cs);
 138
 139         chksum = f2fs_chksum(sbi, sbi->s_chksum_seed, (__u8 *)&ino,
 140                                                         sizeof(ino));
 141         chksum_seed = f2fs_chksum(sbi, chksum, (__u8 *)&gen, sizeof(gen));
 142
 143         chksum = f2fs_chksum(sbi, chksum_seed, (__u8 *)ri, offset);
 144         chksum = f2fs_chksum(sbi, chksum, (__u8 *)&dummy_cs, cs_size);
 145         offset += cs_size;
 146         chksum = f2fs_chksum(sbi, chksum, (__u8 *)ri + offset,
 147                                                 F2FS_BLKSIZE - offset);
 148         return chksum;
 149 }
 150
 151 bool f2fs_inode_chksum_verify(struct f2fs_sb_info *sbi, struct page *page)
 152 {
 153         struct f2fs_inode *ri;
 154         __u32 provided, calculated;
 155
 156         if (!f2fs_enable_inode_chksum(sbi, page) ||
 157                         PageDirty(page) || PageWriteback(page))
 158                 return true;
 159
 160         ri = &F2FS_NODE(page)->i;
 161         provided = le32_to_cpu(ri->i_inode_checksum);
 162         calculated = f2fs_inode_chksum(sbi, page);
 163
 164         if (provided != calculated)
 165                 f2fs_msg(sbi->sb, KERN_WARNING,
 166                         "checksum invalid, ino = %x, %x vs. %x",
 167                         ino_of_node(page), provided, calculated);
 168
 169         return provided == calculated;
 170 }
 171
 172 void f2fs_inode_chksum_set(struct f2fs_sb_info *sbi, struct page *page)
 173 {
 174         struct f2fs_inode *ri = &F2FS_NODE(page)->i;
 175
 176         if (!f2fs_enable_inode_chksum(sbi, page))
 177                 return;
 178
 179         ri->i_inode_checksum = cpu_to_le32(f2fs_inode_chksum(sbi, page));
 180 }
 181
 182 static int do_read_inode(struct inode *inode)
 183 {
 184         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 185         struct f2fs_inode_info *fi = F2FS_I(inode);
 186         struct page *node_page;
 187         struct f2fs_inode *ri;
 188         projid_t i_projid;
 189
 190         /* Check if ino is within scope */
 191         if (check_nid_range(sbi, inode->i_ino)) {
 192                 f2fs_msg(inode->i_sb, KERN_ERR, "bad inode number: %lu",
 193                          (unsigned long) inode->i_ino);
 194                 WARN_ON(1);
 195                 return -EINVAL;
 196         }
 197
 198         node_page = get_node_page(sbi, inode->i_ino);
 199         if (IS_ERR(node_page))
 200                 return PTR_ERR(node_page);
 201
 202         ri = F2FS_INODE(node_page);
 203
 204         inode->i_mode = le16_to_cpu(ri->i_mode);
 205         i_uid_write(inode, le32_to_cpu(ri->i_uid));
 206         i_gid_write(inode, le32_to_cpu(ri->i_gid));
 207         set_nlink(inode, le32_to_cpu(ri->i_links));
 208         inode->i_size = le64_to_cpu(ri->i_size);
 209         inode->i_blocks = SECTOR_FROM_BLOCK(le64_to_cpu(ri->i_blocks) - 1);
 210
 211         inode->i_atime.tv_sec = le64_to_cpu(ri->i_atime);
 212         inode->i_ctime.tv_sec = le64_to_cpu(ri->i_ctime);
 213         inode->i_mtime.tv_sec = le64_to_cpu(ri->i_mtime);
 214         inode->i_atime.tv_nsec = le32_to_cpu(ri->i_atime_nsec);
 215         inode->i_ctime.tv_nsec = le32_to_cpu(ri->i_ctime_nsec);
 216         inode->i_mtime.tv_nsec = le32_to_cpu(ri->i_mtime_nsec);
 217         inode->i_generation = le32_to_cpu(ri->i_generation);
 218
 219         fi->i_current_depth = le32_to_cpu(ri->i_current_depth);
 220         fi->i_xattr_nid = le32_to_cpu(ri->i_xattr_nid);
 221         fi->i_flags = le32_to_cpu(ri->i_flags);
 222         fi->flags = 0;
 223         fi->i_advise = ri->i_advise;
 224         fi->i_pino = le32_to_cpu(ri->i_pino);
 225         fi->i_dir_level = ri->i_dir_level;
 226
 227         if (f2fs_init_extent_tree(inode, &ri->i_ext))
 228                 set_page_dirty(node_page);
 229
 230         get_inline_info(inode, ri);
 231
 232         fi->i_extra_isize = f2fs_has_extra_attr(inode) ?
 233                                         le16_to_cpu(ri->i_extra_isize) : 0;
 234
 235         /* check data exist */
 236         if (f2fs_has_inline_data(inode) && !f2fs_exist_data(inode))
 237                 __recover_inline_status(inode, node_page);
 238
 239         /* get rdev by using inline_info */
 240         __get_inode_rdev(inode, ri);
 241
 242         if (__written_first_block(ri))
 243                 set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN);
 244
 245         if (!need_inode_block_update(sbi, inode->i_ino))
 246                 fi->last_disk_size = inode->i_size;
 247
 248         if (fi->i_flags & FS_PROJINHERIT_FL)
 249                 set_inode_flag(inode, FI_PROJ_INHERIT);
 250
 251         if (f2fs_has_extra_attr(inode) && f2fs_sb_has_project_quota(sbi->sb) &&
 252                         F2FS_FITS_IN_INODE(ri, fi->i_extra_isize, i_projid))
 253                 i_projid = (projid_t)le32_to_cpu(ri->i_projid);
 254         else
 255                 i_projid = F2FS_DEF_PROJID;
 256         fi->i_projid = make_kprojid(&init_user_ns, i_projid);
 257
 258         f2fs_put_page(node_page, 1);
 259
 260         stat_inc_inline_xattr(inode);
 261         stat_inc_inline_inode(inode);
 262         stat_inc_inline_dir(inode);
 263
 264         return 0;
 265 }
 266
 267 struct inode *f2fs_iget(struct super_block *sb, unsigned long ino)
 268 {
 269         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 270         struct inode *inode;
 271         int ret = 0;
 272
 273         inode = iget_locked(sb, ino);
 274         if (!inode)
 275                 return ERR_PTR(-ENOMEM);
 276
 277         if (!(inode->i_state & I_NEW)) {
 278                 trace_f2fs_iget(inode);
 279                 return inode;
 280         }
 281         if (ino == F2FS_NODE_INO(sbi) || ino == F2FS_META_INO(sbi))
 282                 goto make_now;
 283
 284         ret = do_read_inode(inode);
 285         if (ret)
 286                 goto bad_inode;
 287 make_now:
 288         if (ino == F2FS_NODE_INO(sbi)) {
 289                 inode->i_mapping->a_ops = &f2fs_node_aops;
 290                 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
 291         } else if (ino == F2FS_META_INO(sbi)) {
 292                 inode->i_mapping->a_ops = &f2fs_meta_aops;
 293                 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
 294         } else if (S_ISREG(inode->i_mode)) {
 295                 inode->i_op = &f2fs_file_inode_operations;
 296                 inode->i_fop = &f2fs_file_operations;
 297                 inode->i_mapping->a_ops = &f2fs_dblock_aops;
 298         } else if (S_ISDIR(inode->i_mode)) {
 299                 inode->i_op = &f2fs_dir_inode_operations;
 300                 inode->i_fop = &f2fs_dir_operations;
 301                 inode->i_mapping->a_ops = &f2fs_dblock_aops;
 302                 mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO);
 303         } else if (S_ISLNK(inode->i_mode)) {
 304                 if (f2fs_encrypted_inode(inode))
 305                         inode->i_op = &f2fs_encrypted_symlink_inode_operations;
 306                 else
 307                         inode->i_op = &f2fs_symlink_inode_operations;
 308                 inode_nohighmem(inode);
 309                 inode->i_mapping->a_ops = &f2fs_dblock_aops;
 310         } else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) ||
 311                         S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) {
 312                 inode->i_op = &f2fs_special_inode_operations;
 313                 init_special_inode(inode, inode->i_mode, inode->i_rdev);
 314         } else {
 315                 ret = -EIO;
 316                 goto bad_inode;
 317         }
 318         f2fs_set_inode_flags(inode);
 319         unlock_new_inode(inode);
 320         trace_f2fs_iget(inode);
 321         return inode;
 322
 323 bad_inode:
 324         iget_failed(inode);
 325         trace_f2fs_iget_exit(inode, ret);
 326         return ERR_PTR(ret);
 327 }
 328
 329 struct inode *f2fs_iget_retry(struct super_block *sb, unsigned long ino)
 330 {
 331         struct inode *inode;
 332 retry:
 333         inode = f2fs_iget(sb, ino);
 334         if (IS_ERR(inode)) {
 335                 if (PTR_ERR(inode) == -ENOMEM) {
 336                         congestion_wait(BLK_RW_ASYNC, HZ/50);
 337                         goto retry;
 338                 }
 339         }
 340         return inode;
 341 }
 342
 343 int update_inode(struct inode *inode, struct page *node_page)
 344 {
 345         struct f2fs_inode *ri;
 346         struct extent_tree *et = F2FS_I(inode)->extent_tree;
 347
 348         f2fs_inode_synced(inode);
 349
 350         f2fs_wait_on_page_writeback(node_page, NODE, true);
 351
 352         ri = F2FS_INODE(node_page);
 353
 354         ri->i_mode = cpu_to_le16(inode->i_mode);
 355         ri->i_advise = F2FS_I(inode)->i_advise;
 356         ri->i_uid = cpu_to_le32(i_uid_read(inode));
 357         ri->i_gid = cpu_to_le32(i_gid_read(inode));
 358         ri->i_links = cpu_to_le32(inode->i_nlink);
 359         ri->i_size = cpu_to_le64(i_size_read(inode));
 360         ri->i_blocks = cpu_to_le64(SECTOR_TO_BLOCK(inode->i_blocks) + 1);
 361
 362         if (et) {
 363                 read_lock(&et->lock);
 364                 set_raw_extent(&et->largest, &ri->i_ext);
 365                 read_unlock(&et->lock);
 366         } else {
 367                 memset(&ri->i_ext, 0, sizeof(ri->i_ext));
 368         }
 369         set_raw_inline(inode, ri);
 370
 371         ri->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
 372         ri->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
 373         ri->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec);
 374         ri->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
 375         ri->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
 376         ri->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
 377         ri->i_current_depth = cpu_to_le32(F2FS_I(inode)->i_current_depth);
 378         ri->i_xattr_nid = cpu_to_le32(F2FS_I(inode)->i_xattr_nid);
 379         ri->i_flags = cpu_to_le32(F2FS_I(inode)->i_flags);
 380         ri->i_pino = cpu_to_le32(F2FS_I(inode)->i_pino);
 381         ri->i_generation = cpu_to_le32(inode->i_generation);
 382         ri->i_dir_level = F2FS_I(inode)->i_dir_level;
 383
 384         if (f2fs_has_extra_attr(inode)) {
 385                 ri->i_extra_isize = cpu_to_le16(F2FS_I(inode)->i_extra_isize);
 386
 387                 if (f2fs_sb_has_project_quota(F2FS_I_SB(inode)->sb) &&
 388                         F2FS_FITS_IN_INODE(ri, F2FS_I(inode)->i_extra_isize,
 389                                                                 i_projid)) {
 390                         projid_t i_projid;
 391
 392                         i_projid = from_kprojid(&init_user_ns,
 393                                                 F2FS_I(inode)->i_projid);
 394                         ri->i_projid = cpu_to_le32(i_projid);
 395                 }
 396         }
 397
 398         __set_inode_rdev(inode, ri);
 399         set_cold_node(inode, node_page);
 400
 401         /* deleted inode */
 402         if (inode->i_nlink == 0)
 403                 clear_inline_node(node_page);
 404
 405         return set_page_dirty(node_page);
 406 }
 407
 408 int update_inode_page(struct inode *inode)
 409 {
 410         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 411         struct page *node_page;
 412         int ret = 0;
 413 retry:
 414         node_page = get_node_page(sbi, inode->i_ino);
 415         if (IS_ERR(node_page)) {
 416                 int err = PTR_ERR(node_page);
 417                 if (err == -ENOMEM) {
 418                         cond_resched();
 419                         goto retry;
 420                 } else if (err != -ENOENT) {
 421                         f2fs_stop_checkpoint(sbi, false);
 422                 }
 423                 return 0;
 424         }
 425         ret = update_inode(inode, node_page);
 426         f2fs_put_page(node_page, 1);
 427         return ret;
 428 }
 429
 430 int f2fs_write_inode(struct inode *inode, struct writeback_control *wbc)
 431 {
 432         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 433
 434         if (inode->i_ino == F2FS_NODE_INO(sbi) ||
 435                         inode->i_ino == F2FS_META_INO(sbi))
 436                 return 0;
 437
 438         if (!is_inode_flag_set(inode, FI_DIRTY_INODE))
 439                 return 0;
 440
 441         /*
 442          * We need to balance fs here to prevent from producing dirty node pages
 443          * during the urgent cleaning time when runing out of free sections.
 444          */
 445         update_inode_page(inode);
 446         if (wbc && wbc->nr_to_write)
 447                 f2fs_balance_fs(sbi, true);
 448         return 0;
 449 }
 450
 451 /*
 452  * Called at the last iput() if i_nlink is zero
 453  */
 454 void f2fs_evict_inode(struct inode *inode)
 455 {
 456         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 457         nid_t xnid = F2FS_I(inode)->i_xattr_nid;
 458         int err = 0;
 459
 460         /* some remained atomic pages should discarded */
 461         if (f2fs_is_atomic_file(inode))
 462                 drop_inmem_pages(inode);
 463
 464         trace_f2fs_evict_inode(inode);
 465         truncate_inode_pages_final(&inode->i_data);
 466
 467         if (inode->i_ino == F2FS_NODE_INO(sbi) ||
 468                         inode->i_ino == F2FS_META_INO(sbi))
 469                 goto out_clear;
 470
 471         f2fs_bug_on(sbi, get_dirty_pages(inode));
 472         remove_dirty_inode(inode);
 473
 474         f2fs_destroy_extent_tree(inode);
 475
 476         if (inode->i_nlink || is_bad_inode(inode))
 477                 goto no_delete;
 478
 479         dquot_initialize(inode);
 480
 481         remove_ino_entry(sbi, inode->i_ino, APPEND_INO);
 482         remove_ino_entry(sbi, inode->i_ino, UPDATE_INO);
 483         remove_ino_entry(sbi, inode->i_ino, FLUSH_INO);
 484
 485         sb_start_intwrite(inode->i_sb);
 486         set_inode_flag(inode, FI_NO_ALLOC);
 487         i_size_write(inode, 0);
 488 retry:
 489         if (F2FS_HAS_BLOCKS(inode))
 490                 err = f2fs_truncate(inode);
 491
 492 #ifdef CONFIG_F2FS_FAULT_INJECTION
 493         if (time_to_inject(sbi, FAULT_EVICT_INODE)) {
 494                 f2fs_show_injection_info(FAULT_EVICT_INODE);
 495                 err = -EIO;
 496         }
 497 #endif
 498         if (!err) {
 499                 f2fs_lock_op(sbi);
 500                 err = remove_inode_page(inode);
 501                 f2fs_unlock_op(sbi);
 502                 if (err == -ENOENT)
 503                         err = 0;
 504         }
 505
 506         /* give more chances, if ENOMEM case */
 507         if (err == -ENOMEM) {
 508                 err = 0;
 509                 goto retry;
 510         }
 511
 512         if (err)
 513                 update_inode_page(inode);
 514         dquot_free_inode(inode);
 515         sb_end_intwrite(inode->i_sb);
 516 no_delete:
 517         dquot_drop(inode);
 518
 519         stat_dec_inline_xattr(inode);
 520         stat_dec_inline_dir(inode);
 521         stat_dec_inline_inode(inode);
 522
 523         if (likely(!is_set_ckpt_flags(sbi, CP_ERROR_FLAG)))
 524                 f2fs_bug_on(sbi, is_inode_flag_set(inode, FI_DIRTY_INODE));
 525         else
 526                 f2fs_inode_synced(inode);
 527
 528         /* ino == 0, if f2fs_new_inode() was failed t*/
 529         if (inode->i_ino)
 530                 invalidate_mapping_pages(NODE_MAPPING(sbi), inode->i_ino,
 531                                                         inode->i_ino);
 532         if (xnid)
 533                 invalidate_mapping_pages(NODE_MAPPING(sbi), xnid, xnid);
 534         if (inode->i_nlink) {
 535                 if (is_inode_flag_set(inode, FI_APPEND_WRITE))
 536                         add_ino_entry(sbi, inode->i_ino, APPEND_INO);
 537                 if (is_inode_flag_set(inode, FI_UPDATE_WRITE))
 538                         add_ino_entry(sbi, inode->i_ino, UPDATE_INO);
 539         }
 540         if (is_inode_flag_set(inode, FI_FREE_NID)) {
 541                 alloc_nid_failed(sbi, inode->i_ino);
 542                 clear_inode_flag(inode, FI_FREE_NID);
 543         } else {
 544                 f2fs_bug_on(sbi, err &&
 545                         !exist_written_data(sbi, inode->i_ino, ORPHAN_INO));
 546         }
 547 out_clear:
 548         fscrypt_put_encryption_info(inode, NULL);
 549         clear_inode(inode);
 550 }
 551
 552 /* caller should call f2fs_lock_op() */
 553 void handle_failed_inode(struct inode *inode)
 554 {
 555         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 556         struct node_info ni;
 557
 558         /*
 559          * clear nlink of inode in order to release resource of inode
 560          * immediately.
 561          */
 562         clear_nlink(inode);
 563
 564         /*
 565          * we must call this to avoid inode being remained as dirty, resulting
 566          * in a panic when flushing dirty inodes in gdirty_list.
 567          */
 568         update_inode_page(inode);
 569         f2fs_inode_synced(inode);
 570
 571         /* don't make bad inode, since it becomes a regular file. */
 572         unlock_new_inode(inode);
 573
 574         /*
 575          * Note: we should add inode to orphan list before f2fs_unlock_op()
 576          * so we can prevent losing this orphan when encoutering checkpoint
 577          * and following suddenly power-off.
 578          */
 579         get_node_info(sbi, inode->i_ino, &ni);
 580
 581         if (ni.blk_addr != NULL_ADDR) {
 582                 int err = acquire_orphan_inode(sbi);
 583                 if (err) {
 584                         set_sbi_flag(sbi, SBI_NEED_FSCK);
 585                         f2fs_msg(sbi->sb, KERN_WARNING,
 586                                 "Too many orphan inodes, run fsck to fix.");
 587                 } else {
 588                         add_orphan_inode(inode);
 589                 }
 590                 alloc_nid_done(sbi, inode->i_ino);
 591         } else {
 592                 set_inode_flag(inode, FI_FREE_NID);
 593         }
 594
 595         f2fs_unlock_op(sbi);
 596
 597         /* iput will drop the inode object */
 598         iput(inode);
 599 }