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 (is_inode_flag_set(inode, FI_NEW_INODE))
  26                 return;
  27
  28         if (f2fs_inode_dirtied(inode, sync))
  29                 return;
  30
  31         mark_inode_dirty_sync(inode);
  32 }
  33
  34 void f2fs_set_inode_flags(struct inode *inode)
  35 {
  36         unsigned int flags = F2FS_I(inode)->i_flags;
  37         unsigned int new_fl = 0;
  38
  39         if (flags & F2FS_SYNC_FL)
  40                 new_fl |= S_SYNC;
  41         if (flags & F2FS_APPEND_FL)
  42                 new_fl |= S_APPEND;
  43         if (flags & F2FS_IMMUTABLE_FL)
  44                 new_fl |= S_IMMUTABLE;
  45         if (flags & F2FS_NOATIME_FL)
  46                 new_fl |= S_NOATIME;
  47         if (flags & F2FS_DIRSYNC_FL)
  48                 new_fl |= S_DIRSYNC;
  49         if (f2fs_encrypted_inode(inode))
  50                 new_fl |= S_ENCRYPTED;
  51         inode_set_flags(inode, new_fl,
  52                         S_SYNC|S_APPEND|S_IMMUTABLE|S_NOATIME|S_DIRSYNC|
  53                         S_ENCRYPTED);
  54 }
  55
  56 static void __get_inode_rdev(struct inode *inode, struct f2fs_inode *ri)
  57 {
  58         int extra_size = get_extra_isize(inode);
  59
  60         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) ||
  61                         S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) {
  62                 if (ri->i_addr[extra_size])
  63                         inode->i_rdev = old_decode_dev(
  64                                 le32_to_cpu(ri->i_addr[extra_size]));
  65                 else
  66                         inode->i_rdev = new_decode_dev(
  67                                 le32_to_cpu(ri->i_addr[extra_size + 1]));
  68         }
  69 }
  70
  71 static bool __written_first_block(struct f2fs_inode *ri)
  72 {
  73         block_t addr = le32_to_cpu(ri->i_addr[offset_in_addr(ri)]);
  74
  75         if (is_valid_blkaddr(addr))
  76                 return true;
  77         return false;
  78 }
  79
  80 static void __set_inode_rdev(struct inode *inode, struct f2fs_inode *ri)
  81 {
  82         int extra_size = get_extra_isize(inode);
  83
  84         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
  85                 if (old_valid_dev(inode->i_rdev)) {
  86                         ri->i_addr[extra_size] =
  87                                 cpu_to_le32(old_encode_dev(inode->i_rdev));
  88                         ri->i_addr[extra_size + 1] = 0;
  89                 } else {
  90                         ri->i_addr[extra_size] = 0;
  91                         ri->i_addr[extra_size + 1] =
  92                                 cpu_to_le32(new_encode_dev(inode->i_rdev));
  93                         ri->i_addr[extra_size + 2] = 0;
  94                 }
  95         }
  96 }
  97
  98 static void __recover_inline_status(struct inode *inode, struct page *ipage)
  99 {
 100         void *inline_data = inline_data_addr(inode, ipage);
 101         __le32 *start = inline_data;
 102         __le32 *end = start + MAX_INLINE_DATA(inode) / sizeof(__le32);
 103
 104         while (start < end) {
 105                 if (*start++) {
 106                         f2fs_wait_on_page_writeback(ipage, NODE, true);
 107
 108                         set_inode_flag(inode, FI_DATA_EXIST);
 109                         set_raw_inline(inode, F2FS_INODE(ipage));
 110                         set_page_dirty(ipage);
 111                         return;
 112                 }
 113         }
 114         return;
 115 }
 116
 117 static bool f2fs_enable_inode_chksum(struct f2fs_sb_info *sbi, struct page *page)
 118 {
 119         struct f2fs_inode *ri = &F2FS_NODE(page)->i;
 120
 121         if (!f2fs_sb_has_inode_chksum(sbi->sb))
 122                 return false;
 123
 124         if (!RAW_IS_INODE(F2FS_NODE(page)) || !(ri->i_inline & F2FS_EXTRA_ATTR))
 125                 return false;
 126
 127         if (!F2FS_FITS_IN_INODE(ri, le16_to_cpu(ri->i_extra_isize),
 128                                 i_inode_checksum))
 129                 return false;
 130
 131         return true;
 132 }
 133
 134 static __u32 f2fs_inode_chksum(struct f2fs_sb_info *sbi, struct page *page)
 135 {
 136         struct f2fs_node *node = F2FS_NODE(page);
 137         struct f2fs_inode *ri = &node->i;
 138         __le32 ino = node->footer.ino;
 139         __le32 gen = ri->i_generation;
 140         __u32 chksum, chksum_seed;
 141         __u32 dummy_cs = 0;
 142         unsigned int offset = offsetof(struct f2fs_inode, i_inode_checksum);
 143         unsigned int cs_size = sizeof(dummy_cs);
 144
 145         chksum = f2fs_chksum(sbi, sbi->s_chksum_seed, (__u8 *)&ino,
 146                                                         sizeof(ino));
 147         chksum_seed = f2fs_chksum(sbi, chksum, (__u8 *)&gen, sizeof(gen));
 148
 149         chksum = f2fs_chksum(sbi, chksum_seed, (__u8 *)ri, offset);
 150         chksum = f2fs_chksum(sbi, chksum, (__u8 *)&dummy_cs, cs_size);
 151         offset += cs_size;
 152         chksum = f2fs_chksum(sbi, chksum, (__u8 *)ri + offset,
 153                                                 F2FS_BLKSIZE - offset);
 154         return chksum;
 155 }
 156
 157 bool f2fs_inode_chksum_verify(struct f2fs_sb_info *sbi, struct page *page)
 158 {
 159         struct f2fs_inode *ri;
 160         __u32 provided, calculated;
 161
 162         if (unlikely(is_sbi_flag_set(sbi, SBI_IS_SHUTDOWN)))
 163                 return true;
 164
 165 #ifdef CONFIG_F2FS_CHECK_FS
 166         if (!f2fs_enable_inode_chksum(sbi, page))
 167 #else
 168         if (!f2fs_enable_inode_chksum(sbi, page) ||
 169                         PageDirty(page) || PageWriteback(page))
 170 #endif
 171                 return true;
 172
 173         ri = &F2FS_NODE(page)->i;
 174         provided = le32_to_cpu(ri->i_inode_checksum);
 175         calculated = f2fs_inode_chksum(sbi, page);
 176
 177         if (provided != calculated)
 178                 f2fs_msg(sbi->sb, KERN_WARNING,
 179                         "checksum invalid, ino = %x, %x vs. %x",
 180                         ino_of_node(page), provided, calculated);
 181
 182         return provided == calculated;
 183 }
 184
 185 void f2fs_inode_chksum_set(struct f2fs_sb_info *sbi, struct page *page)
 186 {
 187         struct f2fs_inode *ri = &F2FS_NODE(page)->i;
 188
 189         if (!f2fs_enable_inode_chksum(sbi, page))
 190                 return;
 191
 192         ri->i_inode_checksum = cpu_to_le32(f2fs_inode_chksum(sbi, page));
 193 }
 194
 195 static bool sanity_check_inode(struct inode *inode)
 196 {
 197         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 198
 199         if (f2fs_sb_has_flexible_inline_xattr(sbi->sb)
 200                         && !f2fs_has_extra_attr(inode)) {
 201                 set_sbi_flag(sbi, SBI_NEED_FSCK);
 202                 f2fs_msg(sbi->sb, KERN_WARNING,
 203                         "%s: corrupted inode ino=%lx, run fsck to fix.",
 204                         __func__, inode->i_ino);
 205                 return false;
 206         }
 207         return true;
 208 }
 209
 210 static int do_read_inode(struct inode *inode)
 211 {
 212         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 213         struct f2fs_inode_info *fi = F2FS_I(inode);
 214         struct page *node_page;
 215         struct f2fs_inode *ri;
 216         projid_t i_projid;
 217
 218         /* Check if ino is within scope */
 219         if (f2fs_check_nid_range(sbi, inode->i_ino))
 220                 return -EINVAL;
 221
 222         node_page = f2fs_get_node_page(sbi, inode->i_ino);
 223         if (IS_ERR(node_page))
 224                 return PTR_ERR(node_page);
 225
 226         ri = F2FS_INODE(node_page);
 227
 228         inode->i_mode = le16_to_cpu(ri->i_mode);
 229         i_uid_write(inode, le32_to_cpu(ri->i_uid));
 230         i_gid_write(inode, le32_to_cpu(ri->i_gid));
 231         set_nlink(inode, le32_to_cpu(ri->i_links));
 232         inode->i_size = le64_to_cpu(ri->i_size);
 233         inode->i_blocks = SECTOR_FROM_BLOCK(le64_to_cpu(ri->i_blocks) - 1);
 234
 235         inode->i_atime.tv_sec = le64_to_cpu(ri->i_atime);
 236         inode->i_ctime.tv_sec = le64_to_cpu(ri->i_ctime);
 237         inode->i_mtime.tv_sec = le64_to_cpu(ri->i_mtime);
 238         inode->i_atime.tv_nsec = le32_to_cpu(ri->i_atime_nsec);
 239         inode->i_ctime.tv_nsec = le32_to_cpu(ri->i_ctime_nsec);
 240         inode->i_mtime.tv_nsec = le32_to_cpu(ri->i_mtime_nsec);
 241         inode->i_generation = le32_to_cpu(ri->i_generation);
 242         if (S_ISDIR(inode->i_mode))
 243                 fi->i_current_depth = le32_to_cpu(ri->i_current_depth);
 244         else if (S_ISREG(inode->i_mode))
 245                 fi->i_gc_failures[GC_FAILURE_PIN] =
 246                                         le16_to_cpu(ri->i_gc_failures);
 247         fi->i_xattr_nid = le32_to_cpu(ri->i_xattr_nid);
 248         fi->i_flags = le32_to_cpu(ri->i_flags);
 249         fi->flags = 0;
 250         fi->i_advise = ri->i_advise;
 251         fi->i_pino = le32_to_cpu(ri->i_pino);
 252         fi->i_dir_level = ri->i_dir_level;
 253
 254         if (f2fs_init_extent_tree(inode, &ri->i_ext))
 255                 set_page_dirty(node_page);
 256
 257         get_inline_info(inode, ri);
 258
 259         fi->i_extra_isize = f2fs_has_extra_attr(inode) ?
 260                                         le16_to_cpu(ri->i_extra_isize) : 0;
 261
 262         if (f2fs_sb_has_flexible_inline_xattr(sbi->sb)) {
 263                 fi->i_inline_xattr_size = le16_to_cpu(ri->i_inline_xattr_size);
 264         } else if (f2fs_has_inline_xattr(inode) ||
 265                                 f2fs_has_inline_dentry(inode)) {
 266                 fi->i_inline_xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
 267         } else {
 268
 269                 /*
 270                  * Previous inline data or directory always reserved 200 bytes
 271                  * in inode layout, even if inline_xattr is disabled. In order
 272                  * to keep inline_dentry's structure for backward compatibility,
 273                  * we get the space back only from inline_data.
 274                  */
 275                 fi->i_inline_xattr_size = 0;
 276         }
 277
 278         /* check data exist */
 279         if (f2fs_has_inline_data(inode) && !f2fs_exist_data(inode))
 280                 __recover_inline_status(inode, node_page);
 281
 282         /* get rdev by using inline_info */
 283         __get_inode_rdev(inode, ri);
 284
 285         if (__written_first_block(ri))
 286                 set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN);
 287
 288         if (!f2fs_need_inode_block_update(sbi, inode->i_ino))
 289                 fi->last_disk_size = inode->i_size;
 290
 291         if (fi->i_flags & F2FS_PROJINHERIT_FL)
 292                 set_inode_flag(inode, FI_PROJ_INHERIT);
 293
 294         if (f2fs_has_extra_attr(inode) && f2fs_sb_has_project_quota(sbi->sb) &&
 295                         F2FS_FITS_IN_INODE(ri, fi->i_extra_isize, i_projid))
 296                 i_projid = (projid_t)le32_to_cpu(ri->i_projid);
 297         else
 298                 i_projid = F2FS_DEF_PROJID;
 299         fi->i_projid = make_kprojid(&init_user_ns, i_projid);
 300
 301         if (f2fs_has_extra_attr(inode) && f2fs_sb_has_inode_crtime(sbi->sb) &&
 302                         F2FS_FITS_IN_INODE(ri, fi->i_extra_isize, i_crtime)) {
 303                 fi->i_crtime.tv_sec = le64_to_cpu(ri->i_crtime);
 304                 fi->i_crtime.tv_nsec = le32_to_cpu(ri->i_crtime_nsec);
 305         }
 306
 307         F2FS_I(inode)->i_disk_time[0] = timespec64_to_timespec(inode->i_atime);
 308         F2FS_I(inode)->i_disk_time[1] = timespec64_to_timespec(inode->i_ctime);
 309         F2FS_I(inode)->i_disk_time[2] = timespec64_to_timespec(inode->i_mtime);
 310         F2FS_I(inode)->i_disk_time[3] = F2FS_I(inode)->i_crtime;
 311         f2fs_put_page(node_page, 1);
 312
 313         stat_inc_inline_xattr(inode);
 314         stat_inc_inline_inode(inode);
 315         stat_inc_inline_dir(inode);
 316
 317         return 0;
 318 }
 319
 320 struct inode *f2fs_iget(struct super_block *sb, unsigned long ino)
 321 {
 322         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 323         struct inode *inode;
 324         int ret = 0;
 325
 326         inode = iget_locked(sb, ino);
 327         if (!inode)
 328                 return ERR_PTR(-ENOMEM);
 329
 330         if (!(inode->i_state & I_NEW)) {
 331                 trace_f2fs_iget(inode);
 332                 return inode;
 333         }
 334         if (ino == F2FS_NODE_INO(sbi) || ino == F2FS_META_INO(sbi))
 335                 goto make_now;
 336
 337         ret = do_read_inode(inode);
 338         if (ret)
 339                 goto bad_inode;
 340         if (!sanity_check_inode(inode)) {
 341                 ret = -EINVAL;
 342                 goto bad_inode;
 343         }
 344 make_now:
 345         if (ino == F2FS_NODE_INO(sbi)) {
 346                 inode->i_mapping->a_ops = &f2fs_node_aops;
 347                 mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS);
 348         } else if (ino == F2FS_META_INO(sbi)) {
 349                 inode->i_mapping->a_ops = &f2fs_meta_aops;
 350                 mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS);
 351         } else if (S_ISREG(inode->i_mode)) {
 352                 inode->i_op = &f2fs_file_inode_operations;
 353                 inode->i_fop = &f2fs_file_operations;
 354                 inode->i_mapping->a_ops = &f2fs_dblock_aops;
 355         } else if (S_ISDIR(inode->i_mode)) {
 356                 inode->i_op = &f2fs_dir_inode_operations;
 357                 inode->i_fop = &f2fs_dir_operations;
 358                 inode->i_mapping->a_ops = &f2fs_dblock_aops;
 359                 inode_nohighmem(inode);
 360         } else if (S_ISLNK(inode->i_mode)) {
 361                 if (f2fs_encrypted_inode(inode))
 362                         inode->i_op = &f2fs_encrypted_symlink_inode_operations;
 363                 else
 364                         inode->i_op = &f2fs_symlink_inode_operations;
 365                 inode_nohighmem(inode);
 366                 inode->i_mapping->a_ops = &f2fs_dblock_aops;
 367         } else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) ||
 368                         S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) {
 369                 inode->i_op = &f2fs_special_inode_operations;
 370                 init_special_inode(inode, inode->i_mode, inode->i_rdev);
 371         } else {
 372                 ret = -EIO;
 373                 goto bad_inode;
 374         }
 375         f2fs_set_inode_flags(inode);
 376         unlock_new_inode(inode);
 377         trace_f2fs_iget(inode);
 378         return inode;
 379
 380 bad_inode:
 381         iget_failed(inode);
 382         trace_f2fs_iget_exit(inode, ret);
 383         return ERR_PTR(ret);
 384 }
 385
 386 struct inode *f2fs_iget_retry(struct super_block *sb, unsigned long ino)
 387 {
 388         struct inode *inode;
 389 retry:
 390         inode = f2fs_iget(sb, ino);
 391         if (IS_ERR(inode)) {
 392                 if (PTR_ERR(inode) == -ENOMEM) {
 393                         congestion_wait(BLK_RW_ASYNC, HZ/50);
 394                         goto retry;
 395                 }
 396         }
 397         return inode;
 398 }
 399
 400 void f2fs_update_inode(struct inode *inode, struct page *node_page)
 401 {
 402         struct f2fs_inode *ri;
 403         struct extent_tree *et = F2FS_I(inode)->extent_tree;
 404
 405         f2fs_wait_on_page_writeback(node_page, NODE, true);
 406         set_page_dirty(node_page);
 407
 408         f2fs_inode_synced(inode);
 409
 410         ri = F2FS_INODE(node_page);
 411
 412         ri->i_mode = cpu_to_le16(inode->i_mode);
 413         ri->i_advise = F2FS_I(inode)->i_advise;
 414         ri->i_uid = cpu_to_le32(i_uid_read(inode));
 415         ri->i_gid = cpu_to_le32(i_gid_read(inode));
 416         ri->i_links = cpu_to_le32(inode->i_nlink);
 417         ri->i_size = cpu_to_le64(i_size_read(inode));
 418         ri->i_blocks = cpu_to_le64(SECTOR_TO_BLOCK(inode->i_blocks) + 1);
 419
 420         if (et) {
 421                 read_lock(&et->lock);
 422                 set_raw_extent(&et->largest, &ri->i_ext);
 423                 read_unlock(&et->lock);
 424         } else {
 425                 memset(&ri->i_ext, 0, sizeof(ri->i_ext));
 426         }
 427         set_raw_inline(inode, ri);
 428
 429         ri->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
 430         ri->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
 431         ri->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec);
 432         ri->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
 433         ri->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
 434         ri->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
 435         if (S_ISDIR(inode->i_mode))
 436                 ri->i_current_depth =
 437                         cpu_to_le32(F2FS_I(inode)->i_current_depth);
 438         else if (S_ISREG(inode->i_mode))
 439                 ri->i_gc_failures =
 440                         cpu_to_le16(F2FS_I(inode)->i_gc_failures[GC_FAILURE_PIN]);
 441         ri->i_xattr_nid = cpu_to_le32(F2FS_I(inode)->i_xattr_nid);
 442         ri->i_flags = cpu_to_le32(F2FS_I(inode)->i_flags);
 443         ri->i_pino = cpu_to_le32(F2FS_I(inode)->i_pino);
 444         ri->i_generation = cpu_to_le32(inode->i_generation);
 445         ri->i_dir_level = F2FS_I(inode)->i_dir_level;
 446
 447         if (f2fs_has_extra_attr(inode)) {
 448                 ri->i_extra_isize = cpu_to_le16(F2FS_I(inode)->i_extra_isize);
 449
 450                 if (f2fs_sb_has_flexible_inline_xattr(F2FS_I_SB(inode)->sb))
 451                         ri->i_inline_xattr_size =
 452                                 cpu_to_le16(F2FS_I(inode)->i_inline_xattr_size);
 453
 454                 if (f2fs_sb_has_project_quota(F2FS_I_SB(inode)->sb) &&
 455                         F2FS_FITS_IN_INODE(ri, F2FS_I(inode)->i_extra_isize,
 456                                                                 i_projid)) {
 457                         projid_t i_projid;
 458
 459                         i_projid = from_kprojid(&init_user_ns,
 460                                                 F2FS_I(inode)->i_projid);
 461                         ri->i_projid = cpu_to_le32(i_projid);
 462                 }
 463
 464                 if (f2fs_sb_has_inode_crtime(F2FS_I_SB(inode)->sb) &&
 465                         F2FS_FITS_IN_INODE(ri, F2FS_I(inode)->i_extra_isize,
 466                                                                 i_crtime)) {
 467                         ri->i_crtime =
 468                                 cpu_to_le64(F2FS_I(inode)->i_crtime.tv_sec);
 469                         ri->i_crtime_nsec =
 470                                 cpu_to_le32(F2FS_I(inode)->i_crtime.tv_nsec);
 471                 }
 472         }
 473
 474         __set_inode_rdev(inode, ri);
 475
 476         /* deleted inode */
 477         if (inode->i_nlink == 0)
 478                 clear_inline_node(node_page);
 479
 480         F2FS_I(inode)->i_disk_time[0] = timespec64_to_timespec(inode->i_atime);
 481         F2FS_I(inode)->i_disk_time[1] = timespec64_to_timespec(inode->i_ctime);
 482         F2FS_I(inode)->i_disk_time[2] = timespec64_to_timespec(inode->i_mtime);
 483         F2FS_I(inode)->i_disk_time[3] = F2FS_I(inode)->i_crtime;
 484
 485 #ifdef CONFIG_F2FS_CHECK_FS
 486         f2fs_inode_chksum_set(F2FS_I_SB(inode), node_page);
 487 #endif
 488 }
 489
 490 void f2fs_update_inode_page(struct inode *inode)
 491 {
 492         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 493         struct page *node_page;
 494 retry:
 495         node_page = f2fs_get_node_page(sbi, inode->i_ino);
 496         if (IS_ERR(node_page)) {
 497                 int err = PTR_ERR(node_page);
 498                 if (err == -ENOMEM) {
 499                         cond_resched();
 500                         goto retry;
 501                 } else if (err != -ENOENT) {
 502                         f2fs_stop_checkpoint(sbi, false);
 503                 }
 504                 return;
 505         }
 506         f2fs_update_inode(inode, node_page);
 507         f2fs_put_page(node_page, 1);
 508 }
 509
 510 int f2fs_write_inode(struct inode *inode, struct writeback_control *wbc)
 511 {
 512         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 513
 514         if (inode->i_ino == F2FS_NODE_INO(sbi) ||
 515                         inode->i_ino == F2FS_META_INO(sbi))
 516                 return 0;
 517
 518         if (!is_inode_flag_set(inode, FI_DIRTY_INODE))
 519                 return 0;
 520
 521         /*
 522          * We need to balance fs here to prevent from producing dirty node pages
 523          * during the urgent cleaning time when runing out of free sections.
 524          */
 525         f2fs_update_inode_page(inode);
 526         if (wbc && wbc->nr_to_write)
 527                 f2fs_balance_fs(sbi, true);
 528         return 0;
 529 }
 530
 531 /*
 532  * Called at the last iput() if i_nlink is zero
 533  */
 534 void f2fs_evict_inode(struct inode *inode)
 535 {
 536         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 537         nid_t xnid = F2FS_I(inode)->i_xattr_nid;
 538         int err = 0;
 539
 540         /* some remained atomic pages should discarded */
 541         if (f2fs_is_atomic_file(inode))
 542                 f2fs_drop_inmem_pages(inode);
 543
 544         trace_f2fs_evict_inode(inode);
 545         truncate_inode_pages_final(&inode->i_data);
 546
 547         if (inode->i_ino == F2FS_NODE_INO(sbi) ||
 548                         inode->i_ino == F2FS_META_INO(sbi))
 549                 goto out_clear;
 550
 551         f2fs_bug_on(sbi, get_dirty_pages(inode));
 552         f2fs_remove_dirty_inode(inode);
 553
 554         f2fs_destroy_extent_tree(inode);
 555
 556         if (inode->i_nlink || is_bad_inode(inode))
 557                 goto no_delete;
 558
 559         dquot_initialize(inode);
 560
 561         f2fs_remove_ino_entry(sbi, inode->i_ino, APPEND_INO);
 562         f2fs_remove_ino_entry(sbi, inode->i_ino, UPDATE_INO);
 563         f2fs_remove_ino_entry(sbi, inode->i_ino, FLUSH_INO);
 564
 565         sb_start_intwrite(inode->i_sb);
 566         set_inode_flag(inode, FI_NO_ALLOC);
 567         i_size_write(inode, 0);
 568 retry:
 569         if (F2FS_HAS_BLOCKS(inode))
 570                 err = f2fs_truncate(inode);
 571
 572 #ifdef CONFIG_F2FS_FAULT_INJECTION
 573         if (time_to_inject(sbi, FAULT_EVICT_INODE)) {
 574                 f2fs_show_injection_info(FAULT_EVICT_INODE);
 575                 err = -EIO;
 576         }
 577 #endif
 578         if (!err) {
 579                 f2fs_lock_op(sbi);
 580                 err = f2fs_remove_inode_page(inode);
 581                 f2fs_unlock_op(sbi);
 582                 if (err == -ENOENT)
 583                         err = 0;
 584         }
 585
 586         /* give more chances, if ENOMEM case */
 587         if (err == -ENOMEM) {
 588                 err = 0;
 589                 goto retry;
 590         }
 591
 592         if (err)
 593                 f2fs_update_inode_page(inode);
 594         dquot_free_inode(inode);
 595         sb_end_intwrite(inode->i_sb);
 596 no_delete:
 597         dquot_drop(inode);
 598
 599         stat_dec_inline_xattr(inode);
 600         stat_dec_inline_dir(inode);
 601         stat_dec_inline_inode(inode);
 602
 603         if (likely(!is_set_ckpt_flags(sbi, CP_ERROR_FLAG)))
 604                 f2fs_bug_on(sbi, is_inode_flag_set(inode, FI_DIRTY_INODE));
 605         else
 606                 f2fs_inode_synced(inode);
 607
 608         /* ino == 0, if f2fs_new_inode() was failed t*/
 609         if (inode->i_ino)
 610                 invalidate_mapping_pages(NODE_MAPPING(sbi), inode->i_ino,
 611                                                         inode->i_ino);
 612         if (xnid)
 613                 invalidate_mapping_pages(NODE_MAPPING(sbi), xnid, xnid);
 614         if (inode->i_nlink) {
 615                 if (is_inode_flag_set(inode, FI_APPEND_WRITE))
 616                         f2fs_add_ino_entry(sbi, inode->i_ino, APPEND_INO);
 617                 if (is_inode_flag_set(inode, FI_UPDATE_WRITE))
 618                         f2fs_add_ino_entry(sbi, inode->i_ino, UPDATE_INO);
 619         }
 620         if (is_inode_flag_set(inode, FI_FREE_NID)) {
 621                 f2fs_alloc_nid_failed(sbi, inode->i_ino);
 622                 clear_inode_flag(inode, FI_FREE_NID);
 623         } else {
 624                 /*
 625                  * If xattr nid is corrupted, we can reach out error condition,
 626                  * err & !f2fs_exist_written_data(sbi, inode->i_ino, ORPHAN_INO)).
 627                  * In that case, f2fs_check_nid_range() is enough to give a clue.
 628                  */
 629         }
 630 out_clear:
 631         fscrypt_put_encryption_info(inode);
 632         clear_inode(inode);
 633 }
 634
 635 /* caller should call f2fs_lock_op() */
 636 void f2fs_handle_failed_inode(struct inode *inode)
 637 {
 638         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 639         struct node_info ni;
 640
 641         /*
 642          * clear nlink of inode in order to release resource of inode
 643          * immediately.
 644          */
 645         clear_nlink(inode);
 646
 647         /*
 648          * we must call this to avoid inode being remained as dirty, resulting
 649          * in a panic when flushing dirty inodes in gdirty_list.
 650          */
 651         f2fs_update_inode_page(inode);
 652         f2fs_inode_synced(inode);
 653
 654         /* don't make bad inode, since it becomes a regular file. */
 655         unlock_new_inode(inode);
 656
 657         /*
 658          * Note: we should add inode to orphan list before f2fs_unlock_op()
 659          * so we can prevent losing this orphan when encoutering checkpoint
 660          * and following suddenly power-off.
 661          */
 662         f2fs_get_node_info(sbi, inode->i_ino, &ni);
 663
 664         if (ni.blk_addr != NULL_ADDR) {
 665                 int err = f2fs_acquire_orphan_inode(sbi);
 666                 if (err) {
 667                         set_sbi_flag(sbi, SBI_NEED_FSCK);
 668                         f2fs_msg(sbi->sb, KERN_WARNING,
 669                                 "Too many orphan inodes, run fsck to fix.");
 670                 } else {
 671                         f2fs_add_orphan_inode(inode);
 672                 }
 673                 f2fs_alloc_nid_done(sbi, inode->i_ino);
 674         } else {
 675                 set_inode_flag(inode, FI_FREE_NID);
 676         }
 677
 678         f2fs_unlock_op(sbi);
 679
 680         /* iput will drop the inode object */
 681         iput(inode);
 682 }