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