fs/f2fs/inode.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * fs/f2fs/inode.c
   4  *
   5  * Copyright (c) 2012 Samsung Electronics Co., Ltd.
   6  *             http://www.samsung.com/
   7  */
   8 #include <linux/fs.h>
   9 #include <linux/f2fs_fs.h>
  10 #include <linux/buffer_head.h>
  11 #include <linux/backing-dev.h>
  12 #include <linux/writeback.h>
  13
  14 #include "f2fs.h"
  15 #include "node.h"
  16 #include "segment.h"
  17 #include "xattr.h"
  18
  19 #include <trace/events/f2fs.h>
  20
  21 void f2fs_mark_inode_dirty_sync(struct inode *inode, bool sync)
  22 {
  23         if (is_inode_flag_set(inode, FI_NEW_INODE))
  24                 return;
  25
  26         if (f2fs_inode_dirtied(inode, sync))
  27                 return;
  28
  29         mark_inode_dirty_sync(inode);
  30 }
  31
  32 void f2fs_set_inode_flags(struct inode *inode)
  33 {
  34         unsigned int flags = F2FS_I(inode)->i_flags;
  35         unsigned int new_fl = 0;
  36
  37         if (flags & F2FS_SYNC_FL)
  38                 new_fl |= S_SYNC;
  39         if (flags & F2FS_APPEND_FL)
  40                 new_fl |= S_APPEND;
  41         if (flags & F2FS_IMMUTABLE_FL)
  42                 new_fl |= S_IMMUTABLE;
  43         if (flags & F2FS_NOATIME_FL)
  44                 new_fl |= S_NOATIME;
  45         if (flags & F2FS_DIRSYNC_FL)
  46                 new_fl |= S_DIRSYNC;
  47         if (file_is_encrypt(inode))
  48                 new_fl |= S_ENCRYPTED;
  49         if (file_is_verity(inode))
  50                 new_fl |= S_VERITY;
  51         if (flags & F2FS_CASEFOLD_FL)
  52                 new_fl |= S_CASEFOLD;
  53         inode_set_flags(inode, new_fl,
  54                         S_SYNC|S_APPEND|S_IMMUTABLE|S_NOATIME|S_DIRSYNC|
  55                         S_ENCRYPTED|S_VERITY|S_CASEFOLD);
  56 }
  57
  58 static void __get_inode_rdev(struct inode *inode, struct f2fs_inode *ri)
  59 {
  60         int extra_size = get_extra_isize(inode);
  61
  62         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) ||
  63                         S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) {
  64                 if (ri->i_addr[extra_size])
  65                         inode->i_rdev = old_decode_dev(
  66                                 le32_to_cpu(ri->i_addr[extra_size]));
  67                 else
  68                         inode->i_rdev = new_decode_dev(
  69                                 le32_to_cpu(ri->i_addr[extra_size + 1]));
  70         }
  71 }
  72
  73 static int __written_first_block(struct f2fs_sb_info *sbi,
  74                                         struct f2fs_inode *ri)
  75 {
  76         block_t addr = le32_to_cpu(ri->i_addr[offset_in_addr(ri)]);
  77
  78         if (!__is_valid_data_blkaddr(addr))
  79                 return 1;
  80         if (!f2fs_is_valid_blkaddr(sbi, addr, DATA_GENERIC_ENHANCE))
  81                 return -EFSCORRUPTED;
  82         return 0;
  83 }
  84
  85 static void __set_inode_rdev(struct inode *inode, struct f2fs_inode *ri)
  86 {
  87         int extra_size = get_extra_isize(inode);
  88
  89         if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
  90                 if (old_valid_dev(inode->i_rdev)) {
  91                         ri->i_addr[extra_size] =
  92                                 cpu_to_le32(old_encode_dev(inode->i_rdev));
  93                         ri->i_addr[extra_size + 1] = 0;
  94                 } else {
  95                         ri->i_addr[extra_size] = 0;
  96                         ri->i_addr[extra_size + 1] =
  97                                 cpu_to_le32(new_encode_dev(inode->i_rdev));
  98                         ri->i_addr[extra_size + 2] = 0;
  99                 }
 100         }
 101 }
 102
 103 static void __recover_inline_status(struct inode *inode, struct page *ipage)
 104 {
 105         void *inline_data = inline_data_addr(inode, ipage);
 106         __le32 *start = inline_data;
 107         __le32 *end = start + MAX_INLINE_DATA(inode) / sizeof(__le32);
 108
 109         while (start < end) {
 110                 if (*start++) {
 111                         f2fs_wait_on_page_writeback(ipage, NODE, true, true);
 112
 113                         set_inode_flag(inode, FI_DATA_EXIST);
 114                         set_raw_inline(inode, F2FS_INODE(ipage));
 115                         set_page_dirty(ipage);
 116                         return;
 117                 }
 118         }
 119         return;
 120 }
 121
 122 static bool f2fs_enable_inode_chksum(struct f2fs_sb_info *sbi, struct page *page)
 123 {
 124         struct f2fs_inode *ri = &F2FS_NODE(page)->i;
 125
 126         if (!f2fs_sb_has_inode_chksum(sbi))
 127                 return false;
 128
 129         if (!IS_INODE(page) || !(ri->i_inline & F2FS_EXTRA_ATTR))
 130                 return false;
 131
 132         if (!F2FS_FITS_IN_INODE(ri, le16_to_cpu(ri->i_extra_isize),
 133                                 i_inode_checksum))
 134                 return false;
 135
 136         return true;
 137 }
 138
 139 static __u32 f2fs_inode_chksum(struct f2fs_sb_info *sbi, struct page *page)
 140 {
 141         struct f2fs_node *node = F2FS_NODE(page);
 142         struct f2fs_inode *ri = &node->i;
 143         __le32 ino = node->footer.ino;
 144         __le32 gen = ri->i_generation;
 145         __u32 chksum, chksum_seed;
 146         __u32 dummy_cs = 0;
 147         unsigned int offset = offsetof(struct f2fs_inode, i_inode_checksum);
 148         unsigned int cs_size = sizeof(dummy_cs);
 149
 150         chksum = f2fs_chksum(sbi, sbi->s_chksum_seed, (__u8 *)&ino,
 151                                                         sizeof(ino));
 152         chksum_seed = f2fs_chksum(sbi, chksum, (__u8 *)&gen, sizeof(gen));
 153
 154         chksum = f2fs_chksum(sbi, chksum_seed, (__u8 *)ri, offset);
 155         chksum = f2fs_chksum(sbi, chksum, (__u8 *)&dummy_cs, cs_size);
 156         offset += cs_size;
 157         chksum = f2fs_chksum(sbi, chksum, (__u8 *)ri + offset,
 158                                                 F2FS_BLKSIZE - offset);
 159         return chksum;
 160 }
 161
 162 bool f2fs_inode_chksum_verify(struct f2fs_sb_info *sbi, struct page *page)
 163 {
 164         struct f2fs_inode *ri;
 165         __u32 provided, calculated;
 166
 167         if (unlikely(is_sbi_flag_set(sbi, SBI_IS_SHUTDOWN)))
 168                 return true;
 169
 170 #ifdef CONFIG_F2FS_CHECK_FS
 171         if (!f2fs_enable_inode_chksum(sbi, page))
 172 #else
 173         if (!f2fs_enable_inode_chksum(sbi, page) ||
 174                         PageDirty(page) || PageWriteback(page))
 175 #endif
 176                 return true;
 177
 178         ri = &F2FS_NODE(page)->i;
 179         provided = le32_to_cpu(ri->i_inode_checksum);
 180         calculated = f2fs_inode_chksum(sbi, page);
 181
 182         if (provided != calculated)
 183                 f2fs_warn(sbi, "checksum invalid, nid = %lu, ino_of_node = %x, %x vs. %x",
 184                           page->index, ino_of_node(page), provided, calculated);
 185
 186         return provided == calculated;
 187 }
 188
 189 void f2fs_inode_chksum_set(struct f2fs_sb_info *sbi, struct page *page)
 190 {
 191         struct f2fs_inode *ri = &F2FS_NODE(page)->i;
 192
 193         if (!f2fs_enable_inode_chksum(sbi, page))
 194                 return;
 195
 196         ri->i_inode_checksum = cpu_to_le32(f2fs_inode_chksum(sbi, page));
 197 }
 198
 199 static bool sanity_check_inode(struct inode *inode, struct page *node_page)
 200 {
 201         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 202         struct f2fs_inode_info *fi = F2FS_I(inode);
 203         struct f2fs_inode *ri = F2FS_INODE(node_page);
 204         unsigned long long iblocks;
 205
 206         iblocks = le64_to_cpu(F2FS_INODE(node_page)->i_blocks);
 207         if (!iblocks) {
 208                 set_sbi_flag(sbi, SBI_NEED_FSCK);
 209                 f2fs_warn(sbi, "%s: corrupted inode i_blocks i_ino=%lx iblocks=%llu, run fsck to fix.",
 210                           __func__, inode->i_ino, iblocks);
 211                 return false;
 212         }
 213
 214         if (ino_of_node(node_page) != nid_of_node(node_page)) {
 215                 set_sbi_flag(sbi, SBI_NEED_FSCK);
 216                 f2fs_warn(sbi, "%s: corrupted inode footer i_ino=%lx, ino,nid: [%u, %u] run fsck to fix.",
 217                           __func__, inode->i_ino,
 218                           ino_of_node(node_page), nid_of_node(node_page));
 219                 return false;
 220         }
 221
 222         if (f2fs_sb_has_flexible_inline_xattr(sbi)
 223                         && !f2fs_has_extra_attr(inode)) {
 224                 set_sbi_flag(sbi, SBI_NEED_FSCK);
 225                 f2fs_warn(sbi, "%s: corrupted inode ino=%lx, run fsck to fix.",
 226                           __func__, inode->i_ino);
 227                 return false;
 228         }
 229
 230         if (f2fs_has_extra_attr(inode) &&
 231                         !f2fs_sb_has_extra_attr(sbi)) {
 232                 set_sbi_flag(sbi, SBI_NEED_FSCK);
 233                 f2fs_warn(sbi, "%s: inode (ino=%lx) is with extra_attr, but extra_attr feature is off",
 234                           __func__, inode->i_ino);
 235                 return false;
 236         }
 237
 238         if (fi->i_extra_isize > F2FS_TOTAL_EXTRA_ATTR_SIZE ||
 239                         fi->i_extra_isize % sizeof(__le32)) {
 240                 set_sbi_flag(sbi, SBI_NEED_FSCK);
 241                 f2fs_warn(sbi, "%s: inode (ino=%lx) has corrupted i_extra_isize: %d, max: %zu",
 242                           __func__, inode->i_ino, fi->i_extra_isize,
 243                           F2FS_TOTAL_EXTRA_ATTR_SIZE);
 244                 return false;
 245         }
 246
 247         if (f2fs_has_extra_attr(inode) &&
 248                 f2fs_sb_has_flexible_inline_xattr(sbi) &&
 249                 f2fs_has_inline_xattr(inode) &&
 250                 (!fi->i_inline_xattr_size ||
 251                 fi->i_inline_xattr_size > MAX_INLINE_XATTR_SIZE)) {
 252                 set_sbi_flag(sbi, SBI_NEED_FSCK);
 253                 f2fs_warn(sbi, "%s: inode (ino=%lx) has corrupted i_inline_xattr_size: %d, max: %zu",
 254                           __func__, inode->i_ino, fi->i_inline_xattr_size,
 255                           MAX_INLINE_XATTR_SIZE);
 256                 return false;
 257         }
 258
 259         if (F2FS_I(inode)->extent_tree) {
 260                 struct extent_info *ei = &F2FS_I(inode)->extent_tree->largest;
 261
 262                 if (ei->len &&
 263                         (!f2fs_is_valid_blkaddr(sbi, ei->blk,
 264                                                 DATA_GENERIC_ENHANCE) ||
 265                         !f2fs_is_valid_blkaddr(sbi, ei->blk + ei->len - 1,
 266                                                 DATA_GENERIC_ENHANCE))) {
 267                         set_sbi_flag(sbi, SBI_NEED_FSCK);
 268                         f2fs_warn(sbi, "%s: inode (ino=%lx) extent info [%u, %u, %u] is incorrect, run fsck to fix",
 269                                   __func__, inode->i_ino,
 270                                   ei->blk, ei->fofs, ei->len);
 271                         return false;
 272                 }
 273         }
 274
 275         if (f2fs_has_inline_data(inode) &&
 276                         (!S_ISREG(inode->i_mode) && !S_ISLNK(inode->i_mode))) {
 277                 set_sbi_flag(sbi, SBI_NEED_FSCK);
 278                 f2fs_warn(sbi, "%s: inode (ino=%lx, mode=%u) should not have inline_data, run fsck to fix",
 279                           __func__, inode->i_ino, inode->i_mode);
 280                 return false;
 281         }
 282
 283         if (f2fs_has_inline_dentry(inode) && !S_ISDIR(inode->i_mode)) {
 284                 set_sbi_flag(sbi, SBI_NEED_FSCK);
 285                 f2fs_warn(sbi, "%s: inode (ino=%lx, mode=%u) should not have inline_dentry, run fsck to fix",
 286                           __func__, inode->i_ino, inode->i_mode);
 287                 return false;
 288         }
 289
 290         if (f2fs_has_extra_attr(inode) && f2fs_sb_has_compression(sbi) &&
 291                         fi->i_flags & F2FS_COMPR_FL &&
 292                         F2FS_FITS_IN_INODE(ri, fi->i_extra_isize,
 293                                                 i_log_cluster_size)) {
 294                 if (ri->i_compress_algorithm >= COMPRESS_MAX) {
 295                         f2fs_warn(sbi, "%s: inode (ino=%lx) has unsupported "
 296                                 "compress algorithm: %u, run fsck to fix",
 297                                   __func__, inode->i_ino,
 298                                   ri->i_compress_algorithm);
 299                         return false;
 300                 }
 301                 if (le64_to_cpu(ri->i_compr_blocks) >
 302                                 SECTOR_TO_BLOCK(inode->i_blocks)) {
 303                         f2fs_warn(sbi, "%s: inode (ino=%lx) has inconsistent "
 304                                 "i_compr_blocks:%llu, i_blocks:%llu, run fsck to fix",
 305                                   __func__, inode->i_ino,
 306                                   le64_to_cpu(ri->i_compr_blocks),
 307                                   SECTOR_TO_BLOCK(inode->i_blocks));
 308                         return false;
 309                 }
 310                 if (ri->i_log_cluster_size < MIN_COMPRESS_LOG_SIZE ||
 311                         ri->i_log_cluster_size > MAX_COMPRESS_LOG_SIZE) {
 312                         f2fs_warn(sbi, "%s: inode (ino=%lx) has unsupported "
 313                                 "log cluster size: %u, run fsck to fix",
 314                                   __func__, inode->i_ino,
 315                                   ri->i_log_cluster_size);
 316                         return false;
 317                 }
 318         }
 319
 320         return true;
 321 }
 322
 323 static int do_read_inode(struct inode *inode)
 324 {
 325         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 326         struct f2fs_inode_info *fi = F2FS_I(inode);
 327         struct page *node_page;
 328         struct f2fs_inode *ri;
 329         projid_t i_projid;
 330         int err;
 331
 332         /* Check if ino is within scope */
 333         if (f2fs_check_nid_range(sbi, inode->i_ino))
 334                 return -EINVAL;
 335
 336         node_page = f2fs_get_node_page(sbi, inode->i_ino);
 337         if (IS_ERR(node_page))
 338                 return PTR_ERR(node_page);
 339
 340         ri = F2FS_INODE(node_page);
 341
 342         inode->i_mode = le16_to_cpu(ri->i_mode);
 343         i_uid_write(inode, le32_to_cpu(ri->i_uid));
 344         i_gid_write(inode, le32_to_cpu(ri->i_gid));
 345         set_nlink(inode, le32_to_cpu(ri->i_links));
 346         inode->i_size = le64_to_cpu(ri->i_size);
 347         inode->i_blocks = SECTOR_FROM_BLOCK(le64_to_cpu(ri->i_blocks) - 1);
 348
 349         inode->i_atime.tv_sec = le64_to_cpu(ri->i_atime);
 350         inode->i_ctime.tv_sec = le64_to_cpu(ri->i_ctime);
 351         inode->i_mtime.tv_sec = le64_to_cpu(ri->i_mtime);
 352         inode->i_atime.tv_nsec = le32_to_cpu(ri->i_atime_nsec);
 353         inode->i_ctime.tv_nsec = le32_to_cpu(ri->i_ctime_nsec);
 354         inode->i_mtime.tv_nsec = le32_to_cpu(ri->i_mtime_nsec);
 355         inode->i_generation = le32_to_cpu(ri->i_generation);
 356         if (S_ISDIR(inode->i_mode))
 357                 fi->i_current_depth = le32_to_cpu(ri->i_current_depth);
 358         else if (S_ISREG(inode->i_mode))
 359                 fi->i_gc_failures[GC_FAILURE_PIN] =
 360                                         le16_to_cpu(ri->i_gc_failures);
 361         fi->i_xattr_nid = le32_to_cpu(ri->i_xattr_nid);
 362         fi->i_flags = le32_to_cpu(ri->i_flags);
 363         if (S_ISREG(inode->i_mode))
 364                 fi->i_flags &= ~F2FS_PROJINHERIT_FL;
 365         bitmap_zero(fi->flags, FI_MAX);
 366         fi->i_advise = ri->i_advise;
 367         fi->i_pino = le32_to_cpu(ri->i_pino);
 368         fi->i_dir_level = ri->i_dir_level;
 369
 370         if (f2fs_init_extent_tree(inode, &ri->i_ext))
 371                 set_page_dirty(node_page);
 372
 373         get_inline_info(inode, ri);
 374
 375         fi->i_extra_isize = f2fs_has_extra_attr(inode) ?
 376                                         le16_to_cpu(ri->i_extra_isize) : 0;
 377
 378         if (f2fs_sb_has_flexible_inline_xattr(sbi)) {
 379                 fi->i_inline_xattr_size = le16_to_cpu(ri->i_inline_xattr_size);
 380         } else if (f2fs_has_inline_xattr(inode) ||
 381                                 f2fs_has_inline_dentry(inode)) {
 382                 fi->i_inline_xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
 383         } else {
 384
 385                 /*
 386                  * Previous inline data or directory always reserved 200 bytes
 387                  * in inode layout, even if inline_xattr is disabled. In order
 388                  * to keep inline_dentry's structure for backward compatibility,
 389                  * we get the space back only from inline_data.
 390                  */
 391                 fi->i_inline_xattr_size = 0;
 392         }
 393
 394         if (!sanity_check_inode(inode, node_page)) {
 395                 f2fs_put_page(node_page, 1);
 396                 return -EFSCORRUPTED;
 397         }
 398
 399         /* check data exist */
 400         if (f2fs_has_inline_data(inode) && !f2fs_exist_data(inode))
 401                 __recover_inline_status(inode, node_page);
 402
 403         /* try to recover cold bit for non-dir inode */
 404         if (!S_ISDIR(inode->i_mode) && !is_cold_node(node_page)) {
 405                 set_cold_node(node_page, false);
 406                 set_page_dirty(node_page);
 407         }
 408
 409         /* get rdev by using inline_info */
 410         __get_inode_rdev(inode, ri);
 411
 412         if (S_ISREG(inode->i_mode)) {
 413                 err = __written_first_block(sbi, ri);
 414                 if (err < 0) {
 415                         f2fs_put_page(node_page, 1);
 416                         return err;
 417                 }
 418                 if (!err)
 419                         set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN);
 420         }
 421
 422         if (!f2fs_need_inode_block_update(sbi, inode->i_ino))
 423                 fi->last_disk_size = inode->i_size;
 424
 425         if (fi->i_flags & F2FS_PROJINHERIT_FL)
 426                 set_inode_flag(inode, FI_PROJ_INHERIT);
 427
 428         if (f2fs_has_extra_attr(inode) && f2fs_sb_has_project_quota(sbi) &&
 429                         F2FS_FITS_IN_INODE(ri, fi->i_extra_isize, i_projid))
 430                 i_projid = (projid_t)le32_to_cpu(ri->i_projid);
 431         else
 432                 i_projid = F2FS_DEF_PROJID;
 433         fi->i_projid = make_kprojid(&init_user_ns, i_projid);
 434
 435         if (f2fs_has_extra_attr(inode) && f2fs_sb_has_inode_crtime(sbi) &&
 436                         F2FS_FITS_IN_INODE(ri, fi->i_extra_isize, i_crtime)) {
 437                 fi->i_crtime.tv_sec = le64_to_cpu(ri->i_crtime);
 438                 fi->i_crtime.tv_nsec = le32_to_cpu(ri->i_crtime_nsec);
 439         }
 440
 441         if (f2fs_has_extra_attr(inode) && f2fs_sb_has_compression(sbi) &&
 442                                         (fi->i_flags & F2FS_COMPR_FL)) {
 443                 if (F2FS_FITS_IN_INODE(ri, fi->i_extra_isize,
 444                                         i_log_cluster_size)) {
 445                         fi->i_compr_blocks = le64_to_cpu(ri->i_compr_blocks);
 446                         fi->i_compress_algorithm = ri->i_compress_algorithm;
 447                         fi->i_log_cluster_size = ri->i_log_cluster_size;
 448                         fi->i_cluster_size = 1 << fi->i_log_cluster_size;
 449                         set_inode_flag(inode, FI_COMPRESSED_FILE);
 450                 }
 451         }
 452
 453         F2FS_I(inode)->i_disk_time[0] = inode->i_atime;
 454         F2FS_I(inode)->i_disk_time[1] = inode->i_ctime;
 455         F2FS_I(inode)->i_disk_time[2] = inode->i_mtime;
 456         F2FS_I(inode)->i_disk_time[3] = F2FS_I(inode)->i_crtime;
 457         f2fs_put_page(node_page, 1);
 458
 459         stat_inc_inline_xattr(inode);
 460         stat_inc_inline_inode(inode);
 461         stat_inc_inline_dir(inode);
 462         stat_inc_compr_inode(inode);
 463         stat_add_compr_blocks(inode, F2FS_I(inode)->i_compr_blocks);
 464
 465         return 0;
 466 }
 467
 468 struct inode *f2fs_iget(struct super_block *sb, unsigned long ino)
 469 {
 470         struct f2fs_sb_info *sbi = F2FS_SB(sb);
 471         struct inode *inode;
 472         int ret = 0;
 473
 474         inode = iget_locked(sb, ino);
 475         if (!inode)
 476                 return ERR_PTR(-ENOMEM);
 477
 478         if (!(inode->i_state & I_NEW)) {
 479                 trace_f2fs_iget(inode);
 480                 return inode;
 481         }
 482         if (ino == F2FS_NODE_INO(sbi) || ino == F2FS_META_INO(sbi))
 483                 goto make_now;
 484
 485         ret = do_read_inode(inode);
 486         if (ret)
 487                 goto bad_inode;
 488 make_now:
 489         if (ino == F2FS_NODE_INO(sbi)) {
 490                 inode->i_mapping->a_ops = &f2fs_node_aops;
 491                 mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS);
 492         } else if (ino == F2FS_META_INO(sbi)) {
 493                 inode->i_mapping->a_ops = &f2fs_meta_aops;
 494                 mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS);
 495         } else if (S_ISREG(inode->i_mode)) {
 496                 inode->i_op = &f2fs_file_inode_operations;
 497                 inode->i_fop = &f2fs_file_operations;
 498                 inode->i_mapping->a_ops = &f2fs_dblock_aops;
 499         } else if (S_ISDIR(inode->i_mode)) {
 500                 inode->i_op = &f2fs_dir_inode_operations;
 501                 inode->i_fop = &f2fs_dir_operations;
 502                 inode->i_mapping->a_ops = &f2fs_dblock_aops;
 503                 inode_nohighmem(inode);
 504         } else if (S_ISLNK(inode->i_mode)) {
 505                 if (file_is_encrypt(inode))
 506                         inode->i_op = &f2fs_encrypted_symlink_inode_operations;
 507                 else
 508                         inode->i_op = &f2fs_symlink_inode_operations;
 509                 inode_nohighmem(inode);
 510                 inode->i_mapping->a_ops = &f2fs_dblock_aops;
 511         } else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) ||
 512                         S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) {
 513                 inode->i_op = &f2fs_special_inode_operations;
 514                 init_special_inode(inode, inode->i_mode, inode->i_rdev);
 515         } else {
 516                 ret = -EIO;
 517                 goto bad_inode;
 518         }
 519         f2fs_set_inode_flags(inode);
 520         unlock_new_inode(inode);
 521         trace_f2fs_iget(inode);
 522         return inode;
 523
 524 bad_inode:
 525         f2fs_inode_synced(inode);
 526         iget_failed(inode);
 527         trace_f2fs_iget_exit(inode, ret);
 528         return ERR_PTR(ret);
 529 }
 530
 531 struct inode *f2fs_iget_retry(struct super_block *sb, unsigned long ino)
 532 {
 533         struct inode *inode;
 534 retry:
 535         inode = f2fs_iget(sb, ino);
 536         if (IS_ERR(inode)) {
 537                 if (PTR_ERR(inode) == -ENOMEM) {
 538                         congestion_wait(BLK_RW_ASYNC, DEFAULT_IO_TIMEOUT);
 539                         goto retry;
 540                 }
 541         }
 542         return inode;
 543 }
 544
 545 void f2fs_update_inode(struct inode *inode, struct page *node_page)
 546 {
 547         struct f2fs_inode *ri;
 548         struct extent_tree *et = F2FS_I(inode)->extent_tree;
 549
 550         f2fs_wait_on_page_writeback(node_page, NODE, true, true);
 551         set_page_dirty(node_page);
 552
 553         f2fs_inode_synced(inode);
 554
 555         ri = F2FS_INODE(node_page);
 556
 557         ri->i_mode = cpu_to_le16(inode->i_mode);
 558         ri->i_advise = F2FS_I(inode)->i_advise;
 559         ri->i_uid = cpu_to_le32(i_uid_read(inode));
 560         ri->i_gid = cpu_to_le32(i_gid_read(inode));
 561         ri->i_links = cpu_to_le32(inode->i_nlink);
 562         ri->i_size = cpu_to_le64(i_size_read(inode));
 563         ri->i_blocks = cpu_to_le64(SECTOR_TO_BLOCK(inode->i_blocks) + 1);
 564
 565         if (et) {
 566                 read_lock(&et->lock);
 567                 set_raw_extent(&et->largest, &ri->i_ext);
 568                 read_unlock(&et->lock);
 569         } else {
 570                 memset(&ri->i_ext, 0, sizeof(ri->i_ext));
 571         }
 572         set_raw_inline(inode, ri);
 573
 574         ri->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
 575         ri->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
 576         ri->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec);
 577         ri->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
 578         ri->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
 579         ri->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
 580         if (S_ISDIR(inode->i_mode))
 581                 ri->i_current_depth =
 582                         cpu_to_le32(F2FS_I(inode)->i_current_depth);
 583         else if (S_ISREG(inode->i_mode))
 584                 ri->i_gc_failures =
 585                         cpu_to_le16(F2FS_I(inode)->i_gc_failures[GC_FAILURE_PIN]);
 586         ri->i_xattr_nid = cpu_to_le32(F2FS_I(inode)->i_xattr_nid);
 587         ri->i_flags = cpu_to_le32(F2FS_I(inode)->i_flags);
 588         ri->i_pino = cpu_to_le32(F2FS_I(inode)->i_pino);
 589         ri->i_generation = cpu_to_le32(inode->i_generation);
 590         ri->i_dir_level = F2FS_I(inode)->i_dir_level;
 591
 592         if (f2fs_has_extra_attr(inode)) {
 593                 ri->i_extra_isize = cpu_to_le16(F2FS_I(inode)->i_extra_isize);
 594
 595                 if (f2fs_sb_has_flexible_inline_xattr(F2FS_I_SB(inode)))
 596                         ri->i_inline_xattr_size =
 597                                 cpu_to_le16(F2FS_I(inode)->i_inline_xattr_size);
 598
 599                 if (f2fs_sb_has_project_quota(F2FS_I_SB(inode)) &&
 600                         F2FS_FITS_IN_INODE(ri, F2FS_I(inode)->i_extra_isize,
 601                                                                 i_projid)) {
 602                         projid_t i_projid;
 603
 604                         i_projid = from_kprojid(&init_user_ns,
 605                                                 F2FS_I(inode)->i_projid);
 606                         ri->i_projid = cpu_to_le32(i_projid);
 607                 }
 608
 609                 if (f2fs_sb_has_inode_crtime(F2FS_I_SB(inode)) &&
 610                         F2FS_FITS_IN_INODE(ri, F2FS_I(inode)->i_extra_isize,
 611                                                                 i_crtime)) {
 612                         ri->i_crtime =
 613                                 cpu_to_le64(F2FS_I(inode)->i_crtime.tv_sec);
 614                         ri->i_crtime_nsec =
 615                                 cpu_to_le32(F2FS_I(inode)->i_crtime.tv_nsec);
 616                 }
 617
 618                 if (f2fs_sb_has_compression(F2FS_I_SB(inode)) &&
 619                         F2FS_FITS_IN_INODE(ri, F2FS_I(inode)->i_extra_isize,
 620                                                         i_log_cluster_size)) {
 621                         ri->i_compr_blocks =
 622                                 cpu_to_le64(F2FS_I(inode)->i_compr_blocks);
 623                         ri->i_compress_algorithm =
 624                                 F2FS_I(inode)->i_compress_algorithm;
 625                         ri->i_log_cluster_size =
 626                                 F2FS_I(inode)->i_log_cluster_size;
 627                 }
 628         }
 629
 630         __set_inode_rdev(inode, ri);
 631
 632         /* deleted inode */
 633         if (inode->i_nlink == 0)
 634                 clear_inline_node(node_page);
 635
 636         F2FS_I(inode)->i_disk_time[0] = inode->i_atime;
 637         F2FS_I(inode)->i_disk_time[1] = inode->i_ctime;
 638         F2FS_I(inode)->i_disk_time[2] = inode->i_mtime;
 639         F2FS_I(inode)->i_disk_time[3] = F2FS_I(inode)->i_crtime;
 640
 641 #ifdef CONFIG_F2FS_CHECK_FS
 642         f2fs_inode_chksum_set(F2FS_I_SB(inode), node_page);
 643 #endif
 644 }
 645
 646 void f2fs_update_inode_page(struct inode *inode)
 647 {
 648         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 649         struct page *node_page;
 650 retry:
 651         node_page = f2fs_get_node_page(sbi, inode->i_ino);
 652         if (IS_ERR(node_page)) {
 653                 int err = PTR_ERR(node_page);
 654                 if (err == -ENOMEM) {
 655                         cond_resched();
 656                         goto retry;
 657                 } else if (err != -ENOENT) {
 658                         f2fs_stop_checkpoint(sbi, false);
 659                 }
 660                 return;
 661         }
 662         f2fs_update_inode(inode, node_page);
 663         f2fs_put_page(node_page, 1);
 664 }
 665
 666 int f2fs_write_inode(struct inode *inode, struct writeback_control *wbc)
 667 {
 668         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 669
 670         if (inode->i_ino == F2FS_NODE_INO(sbi) ||
 671                         inode->i_ino == F2FS_META_INO(sbi))
 672                 return 0;
 673
 674         /*
 675          * atime could be updated without dirtying f2fs inode in lazytime mode
 676          */
 677         if (f2fs_is_time_consistent(inode) &&
 678                 !is_inode_flag_set(inode, FI_DIRTY_INODE))
 679                 return 0;
 680
 681         if (!f2fs_is_checkpoint_ready(sbi))
 682                 return -ENOSPC;
 683
 684         /*
 685          * We need to balance fs here to prevent from producing dirty node pages
 686          * during the urgent cleaning time when runing out of free sections.
 687          */
 688         f2fs_update_inode_page(inode);
 689         if (wbc && wbc->nr_to_write)
 690                 f2fs_balance_fs(sbi, true);
 691         return 0;
 692 }
 693
 694 /*
 695  * Called at the last iput() if i_nlink is zero
 696  */
 697 void f2fs_evict_inode(struct inode *inode)
 698 {
 699         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 700         nid_t xnid = F2FS_I(inode)->i_xattr_nid;
 701         int err = 0;
 702
 703         /* some remained atomic pages should discarded */
 704         if (f2fs_is_atomic_file(inode))
 705                 f2fs_drop_inmem_pages(inode);
 706
 707         trace_f2fs_evict_inode(inode);
 708         truncate_inode_pages_final(&inode->i_data);
 709
 710         if (inode->i_ino == F2FS_NODE_INO(sbi) ||
 711                         inode->i_ino == F2FS_META_INO(sbi))
 712                 goto out_clear;
 713
 714         f2fs_bug_on(sbi, get_dirty_pages(inode));
 715         f2fs_remove_dirty_inode(inode);
 716
 717         f2fs_destroy_extent_tree(inode);
 718
 719         if (inode->i_nlink || is_bad_inode(inode))
 720                 goto no_delete;
 721
 722         err = dquot_initialize(inode);
 723         if (err) {
 724                 err = 0;
 725                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
 726         }
 727
 728         f2fs_remove_ino_entry(sbi, inode->i_ino, APPEND_INO);
 729         f2fs_remove_ino_entry(sbi, inode->i_ino, UPDATE_INO);
 730         f2fs_remove_ino_entry(sbi, inode->i_ino, FLUSH_INO);
 731
 732         sb_start_intwrite(inode->i_sb);
 733         set_inode_flag(inode, FI_NO_ALLOC);
 734         i_size_write(inode, 0);
 735 retry:
 736         if (F2FS_HAS_BLOCKS(inode))
 737                 err = f2fs_truncate(inode);
 738
 739         if (time_to_inject(sbi, FAULT_EVICT_INODE)) {
 740                 f2fs_show_injection_info(sbi, FAULT_EVICT_INODE);
 741                 err = -EIO;
 742         }
 743
 744         if (!err) {
 745                 f2fs_lock_op(sbi);
 746                 err = f2fs_remove_inode_page(inode);
 747                 f2fs_unlock_op(sbi);
 748                 if (err == -ENOENT)
 749                         err = 0;
 750         }
 751
 752         /* give more chances, if ENOMEM case */
 753         if (err == -ENOMEM) {
 754                 err = 0;
 755                 goto retry;
 756         }
 757
 758         if (err) {
 759                 f2fs_update_inode_page(inode);
 760                 if (dquot_initialize_needed(inode))
 761                         set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
 762         }
 763         sb_end_intwrite(inode->i_sb);
 764 no_delete:
 765         dquot_drop(inode);
 766
 767         stat_dec_inline_xattr(inode);
 768         stat_dec_inline_dir(inode);
 769         stat_dec_inline_inode(inode);
 770         stat_dec_compr_inode(inode);
 771         stat_sub_compr_blocks(inode, F2FS_I(inode)->i_compr_blocks);
 772
 773         if (likely(!f2fs_cp_error(sbi) &&
 774                                 !is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
 775                 f2fs_bug_on(sbi, is_inode_flag_set(inode, FI_DIRTY_INODE));
 776         else
 777                 f2fs_inode_synced(inode);
 778
 779         /* for the case f2fs_new_inode() was failed, .i_ino is zero, skip it */
 780         if (inode->i_ino)
 781                 invalidate_mapping_pages(NODE_MAPPING(sbi), inode->i_ino,
 782                                                         inode->i_ino);
 783         if (xnid)
 784                 invalidate_mapping_pages(NODE_MAPPING(sbi), xnid, xnid);
 785         if (inode->i_nlink) {
 786                 if (is_inode_flag_set(inode, FI_APPEND_WRITE))
 787                         f2fs_add_ino_entry(sbi, inode->i_ino, APPEND_INO);
 788                 if (is_inode_flag_set(inode, FI_UPDATE_WRITE))
 789                         f2fs_add_ino_entry(sbi, inode->i_ino, UPDATE_INO);
 790         }
 791         if (is_inode_flag_set(inode, FI_FREE_NID)) {
 792                 f2fs_alloc_nid_failed(sbi, inode->i_ino);
 793                 clear_inode_flag(inode, FI_FREE_NID);
 794         } else {
 795                 /*
 796                  * If xattr nid is corrupted, we can reach out error condition,
 797                  * err & !f2fs_exist_written_data(sbi, inode->i_ino, ORPHAN_INO)).
 798                  * In that case, f2fs_check_nid_range() is enough to give a clue.
 799                  */
 800         }
 801 out_clear:
 802         fscrypt_put_encryption_info(inode);
 803         fsverity_cleanup_inode(inode);
 804         clear_inode(inode);
 805 }
 806
 807 /* caller should call f2fs_lock_op() */
 808 void f2fs_handle_failed_inode(struct inode *inode)
 809 {
 810         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 811         struct node_info ni;
 812         int err;
 813
 814         /*
 815          * clear nlink of inode in order to release resource of inode
 816          * immediately.
 817          */
 818         clear_nlink(inode);
 819
 820         /*
 821          * we must call this to avoid inode being remained as dirty, resulting
 822          * in a panic when flushing dirty inodes in gdirty_list.
 823          */
 824         f2fs_update_inode_page(inode);
 825         f2fs_inode_synced(inode);
 826
 827         /* don't make bad inode, since it becomes a regular file. */
 828         unlock_new_inode(inode);
 829
 830         /*
 831          * Note: we should add inode to orphan list before f2fs_unlock_op()
 832          * so we can prevent losing this orphan when encoutering checkpoint
 833          * and following suddenly power-off.
 834          */
 835         err = f2fs_get_node_info(sbi, inode->i_ino, &ni);
 836         if (err) {
 837                 set_sbi_flag(sbi, SBI_NEED_FSCK);
 838                 f2fs_warn(sbi, "May loss orphan inode, run fsck to fix.");
 839                 goto out;
 840         }
 841
 842         if (ni.blk_addr != NULL_ADDR) {
 843                 err = f2fs_acquire_orphan_inode(sbi);
 844                 if (err) {
 845                         set_sbi_flag(sbi, SBI_NEED_FSCK);
 846                         f2fs_warn(sbi, "Too many orphan inodes, run fsck to fix.");
 847                 } else {
 848                         f2fs_add_orphan_inode(inode);
 849                 }
 850                 f2fs_alloc_nid_done(sbi, inode->i_ino);
 851         } else {
 852                 set_inode_flag(inode, FI_FREE_NID);
 853         }
 854
 855 out:
 856         f2fs_unlock_op(sbi);
 857
 858         /* iput will drop the inode object */
 859         iput(inode);
 860 }