fs/f2fs/file.c

   1 /*
   2  * fs/f2fs/file.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/stat.h>
  14 #include <linux/buffer_head.h>
  15 #include <linux/writeback.h>
  16 #include <linux/blkdev.h>
  17 #include <linux/falloc.h>
  18 #include <linux/types.h>
  19 #include <linux/compat.h>
  20 #include <linux/uaccess.h>
  21 #include <linux/mount.h>
  22
  23 #include "f2fs.h"
  24 #include "node.h"
  25 #include "segment.h"
  26 #include "xattr.h"
  27 #include "acl.h"
  28 #include <trace/events/f2fs.h>
  29
  30 static int f2fs_vm_page_mkwrite(struct vm_area_struct *vma,
  31                                                 struct vm_fault *vmf)
  32 {
  33         struct page *page = vmf->page;
  34         struct inode *inode = file_inode(vma->vm_file);
  35         struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
  36         struct dnode_of_data dn;
  37         int err;
  38
  39         f2fs_balance_fs(sbi);
  40
  41         sb_start_pagefault(inode->i_sb);
  42
  43         /* block allocation */
  44         f2fs_lock_op(sbi);
  45         set_new_dnode(&dn, inode, NULL, NULL, 0);
  46         err = f2fs_reserve_block(&dn, page->index);
  47         f2fs_unlock_op(sbi);
  48         if (err)
  49                 goto out;
  50
  51         file_update_time(vma->vm_file);
  52         lock_page(page);
  53         if (unlikely(page->mapping != inode->i_mapping ||
  54                         page_offset(page) > i_size_read(inode) ||
  55                         !PageUptodate(page))) {
  56                 unlock_page(page);
  57                 err = -EFAULT;
  58                 goto out;
  59         }
  60
  61         /*
  62          * check to see if the page is mapped already (no holes)
  63          */
  64         if (PageMappedToDisk(page))
  65                 goto mapped;
  66
  67         /* page is wholly or partially inside EOF */
  68         if (((page->index + 1) << PAGE_CACHE_SHIFT) > i_size_read(inode)) {
  69                 unsigned offset;
  70                 offset = i_size_read(inode) & ~PAGE_CACHE_MASK;
  71                 zero_user_segment(page, offset, PAGE_CACHE_SIZE);
  72         }
  73         set_page_dirty(page);
  74         SetPageUptodate(page);
  75
  76         trace_f2fs_vm_page_mkwrite(page, DATA);
  77 mapped:
  78         /* fill the page */
  79         wait_on_page_writeback(page);
  80 out:
  81         sb_end_pagefault(inode->i_sb);
  82         return block_page_mkwrite_return(err);
  83 }
  84
  85 static const struct vm_operations_struct f2fs_file_vm_ops = {
  86         .fault          = filemap_fault,
  87         .page_mkwrite   = f2fs_vm_page_mkwrite,
  88         .remap_pages    = generic_file_remap_pages,
  89 };
  90
  91 static int get_parent_ino(struct inode *inode, nid_t *pino)
  92 {
  93         struct dentry *dentry;
  94
  95         inode = igrab(inode);
  96         dentry = d_find_any_alias(inode);
  97         iput(inode);
  98         if (!dentry)
  99                 return 0;
 100
 101         if (update_dent_inode(inode, &dentry->d_name)) {
 102                 dput(dentry);
 103                 return 0;
 104         }
 105
 106         *pino = parent_ino(dentry);
 107         dput(dentry);
 108         return 1;
 109 }
 110
 111 int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
 112 {
 113         struct inode *inode = file->f_mapping->host;
 114         struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
 115         int ret = 0;
 116         bool need_cp = false;
 117         struct writeback_control wbc = {
 118                 .sync_mode = WB_SYNC_NONE,
 119                 .nr_to_write = LONG_MAX,
 120                 .for_reclaim = 0,
 121         };
 122
 123         if (unlikely(f2fs_readonly(inode->i_sb)))
 124                 return 0;
 125
 126         trace_f2fs_sync_file_enter(inode);
 127         ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
 128         if (ret) {
 129                 trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret);
 130                 return ret;
 131         }
 132
 133         /* guarantee free sections for fsync */
 134         f2fs_balance_fs(sbi);
 135
 136         mutex_lock(&inode->i_mutex);
 137
 138         /*
 139          * Both of fdatasync() and fsync() are able to be recovered from
 140          * sudden-power-off.
 141          */
 142         if (!S_ISREG(inode->i_mode) || inode->i_nlink != 1)
 143                 need_cp = true;
 144         else if (file_wrong_pino(inode))
 145                 need_cp = true;
 146         else if (!space_for_roll_forward(sbi))
 147                 need_cp = true;
 148         else if (!is_checkpointed_node(sbi, F2FS_I(inode)->i_pino))
 149                 need_cp = true;
 150         else if (F2FS_I(inode)->xattr_ver == cur_cp_version(F2FS_CKPT(sbi)))
 151                 need_cp = true;
 152
 153         if (need_cp) {
 154                 nid_t pino;
 155
 156                 F2FS_I(inode)->xattr_ver = 0;
 157
 158                 /* all the dirty node pages should be flushed for POR */
 159                 ret = f2fs_sync_fs(inode->i_sb, 1);
 160                 if (file_wrong_pino(inode) && inode->i_nlink == 1 &&
 161                                         get_parent_ino(inode, &pino)) {
 162                         F2FS_I(inode)->i_pino = pino;
 163                         file_got_pino(inode);
 164                         mark_inode_dirty_sync(inode);
 165                         ret = f2fs_write_inode(inode, NULL);
 166                         if (ret)
 167                                 goto out;
 168                 }
 169         } else {
 170                 /* if there is no written node page, write its inode page */
 171                 while (!sync_node_pages(sbi, inode->i_ino, &wbc)) {
 172                         mark_inode_dirty_sync(inode);
 173                         ret = f2fs_write_inode(inode, NULL);
 174                         if (ret)
 175                                 goto out;
 176                 }
 177                 ret = wait_on_node_pages_writeback(sbi, inode->i_ino);
 178                 if (ret)
 179                         goto out;
 180                 ret = blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
 181         }
 182 out:
 183         mutex_unlock(&inode->i_mutex);
 184         trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret);
 185         return ret;
 186 }
 187
 188 static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma)
 189 {
 190         file_accessed(file);
 191         vma->vm_ops = &f2fs_file_vm_ops;
 192         return 0;
 193 }
 194
 195 int truncate_data_blocks_range(struct dnode_of_data *dn, int count)
 196 {
 197         int nr_free = 0, ofs = dn->ofs_in_node;
 198         struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb);
 199         struct f2fs_node *raw_node;
 200         __le32 *addr;
 201
 202         raw_node = F2FS_NODE(dn->node_page);
 203         addr = blkaddr_in_node(raw_node) + ofs;
 204
 205         for (; count > 0; count--, addr++, dn->ofs_in_node++) {
 206                 block_t blkaddr = le32_to_cpu(*addr);
 207                 if (blkaddr == NULL_ADDR)
 208                         continue;
 209
 210                 update_extent_cache(NULL_ADDR, dn);
 211                 invalidate_blocks(sbi, blkaddr);
 212                 nr_free++;
 213         }
 214         if (nr_free) {
 215                 dec_valid_block_count(sbi, dn->inode, nr_free);
 216                 set_page_dirty(dn->node_page);
 217                 sync_inode_page(dn);
 218         }
 219         dn->ofs_in_node = ofs;
 220
 221         trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid,
 222                                          dn->ofs_in_node, nr_free);
 223         return nr_free;
 224 }
 225
 226 void truncate_data_blocks(struct dnode_of_data *dn)
 227 {
 228         truncate_data_blocks_range(dn, ADDRS_PER_BLOCK);
 229 }
 230
 231 static void truncate_partial_data_page(struct inode *inode, u64 from)
 232 {
 233         unsigned offset = from & (PAGE_CACHE_SIZE - 1);
 234         struct page *page;
 235
 236         if (!offset)
 237                 return;
 238
 239         page = find_data_page(inode, from >> PAGE_CACHE_SHIFT, false);
 240         if (IS_ERR(page))
 241                 return;
 242
 243         lock_page(page);
 244         if (unlikely(page->mapping != inode->i_mapping)) {
 245                 f2fs_put_page(page, 1);
 246                 return;
 247         }
 248         wait_on_page_writeback(page);
 249         zero_user(page, offset, PAGE_CACHE_SIZE - offset);
 250         set_page_dirty(page);
 251         f2fs_put_page(page, 1);
 252 }
 253
 254 int truncate_blocks(struct inode *inode, u64 from)
 255 {
 256         struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
 257         unsigned int blocksize = inode->i_sb->s_blocksize;
 258         struct dnode_of_data dn;
 259         pgoff_t free_from;
 260         int count = 0, err = 0;
 261
 262         trace_f2fs_truncate_blocks_enter(inode, from);
 263
 264         if (f2fs_has_inline_data(inode))
 265                 goto done;
 266
 267         free_from = (pgoff_t)
 268                         ((from + blocksize - 1) >> (sbi->log_blocksize));
 269
 270         f2fs_lock_op(sbi);
 271
 272         set_new_dnode(&dn, inode, NULL, NULL, 0);
 273         err = get_dnode_of_data(&dn, free_from, LOOKUP_NODE);
 274         if (err) {
 275                 if (err == -ENOENT)
 276                         goto free_next;
 277                 f2fs_unlock_op(sbi);
 278                 trace_f2fs_truncate_blocks_exit(inode, err);
 279                 return err;
 280         }
 281
 282         if (IS_INODE(dn.node_page))
 283                 count = ADDRS_PER_INODE(F2FS_I(inode));
 284         else
 285                 count = ADDRS_PER_BLOCK;
 286
 287         count -= dn.ofs_in_node;
 288         f2fs_bug_on(count < 0);
 289
 290         if (dn.ofs_in_node || IS_INODE(dn.node_page)) {
 291                 truncate_data_blocks_range(&dn, count);
 292                 free_from += count;
 293         }
 294
 295         f2fs_put_dnode(&dn);
 296 free_next:
 297         err = truncate_inode_blocks(inode, free_from);
 298         f2fs_unlock_op(sbi);
 299 done:
 300         /* lastly zero out the first data page */
 301         truncate_partial_data_page(inode, from);
 302
 303         trace_f2fs_truncate_blocks_exit(inode, err);
 304         return err;
 305 }
 306
 307 void f2fs_truncate(struct inode *inode)
 308 {
 309         if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
 310                                 S_ISLNK(inode->i_mode)))
 311                 return;
 312
 313         trace_f2fs_truncate(inode);
 314
 315         if (!truncate_blocks(inode, i_size_read(inode))) {
 316                 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
 317                 mark_inode_dirty(inode);
 318         }
 319 }
 320
 321 int f2fs_getattr(struct vfsmount *mnt,
 322                          struct dentry *dentry, struct kstat *stat)
 323 {
 324         struct inode *inode = dentry->d_inode;
 325         generic_fillattr(inode, stat);
 326         stat->blocks <<= 3;
 327         return 0;
 328 }
 329
 330 #ifdef CONFIG_F2FS_FS_POSIX_ACL
 331 static void __setattr_copy(struct inode *inode, const struct iattr *attr)
 332 {
 333         struct f2fs_inode_info *fi = F2FS_I(inode);
 334         unsigned int ia_valid = attr->ia_valid;
 335
 336         if (ia_valid & ATTR_UID)
 337                 inode->i_uid = attr->ia_uid;
 338         if (ia_valid & ATTR_GID)
 339                 inode->i_gid = attr->ia_gid;
 340         if (ia_valid & ATTR_ATIME)
 341                 inode->i_atime = timespec_trunc(attr->ia_atime,
 342                                                 inode->i_sb->s_time_gran);
 343         if (ia_valid & ATTR_MTIME)
 344                 inode->i_mtime = timespec_trunc(attr->ia_mtime,
 345                                                 inode->i_sb->s_time_gran);
 346         if (ia_valid & ATTR_CTIME)
 347                 inode->i_ctime = timespec_trunc(attr->ia_ctime,
 348                                                 inode->i_sb->s_time_gran);
 349         if (ia_valid & ATTR_MODE) {
 350                 umode_t mode = attr->ia_mode;
 351
 352                 if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
 353                         mode &= ~S_ISGID;
 354                 set_acl_inode(fi, mode);
 355         }
 356 }
 357 #else
 358 #define __setattr_copy setattr_copy
 359 #endif
 360
 361 int f2fs_setattr(struct dentry *dentry, struct iattr *attr)
 362 {
 363         struct inode *inode = dentry->d_inode;
 364         struct f2fs_inode_info *fi = F2FS_I(inode);
 365         int err;
 366
 367         err = inode_change_ok(inode, attr);
 368         if (err)
 369                 return err;
 370
 371         if ((attr->ia_valid & ATTR_SIZE) &&
 372                         attr->ia_size != i_size_read(inode)) {
 373                 err = f2fs_convert_inline_data(inode, attr->ia_size);
 374                 if (err)
 375                         return err;
 376
 377                 truncate_setsize(inode, attr->ia_size);
 378                 f2fs_truncate(inode);
 379                 f2fs_balance_fs(F2FS_SB(inode->i_sb));
 380         }
 381
 382         __setattr_copy(inode, attr);
 383
 384         if (attr->ia_valid & ATTR_MODE) {
 385                 err = f2fs_acl_chmod(inode);
 386                 if (err || is_inode_flag_set(fi, FI_ACL_MODE)) {
 387                         inode->i_mode = fi->i_acl_mode;
 388                         clear_inode_flag(fi, FI_ACL_MODE);
 389                 }
 390         }
 391
 392         mark_inode_dirty(inode);
 393         return err;
 394 }
 395
 396 const struct inode_operations f2fs_file_inode_operations = {
 397         .getattr        = f2fs_getattr,
 398         .setattr        = f2fs_setattr,
 399         .get_acl        = f2fs_get_acl,
 400 #ifdef CONFIG_F2FS_FS_XATTR
 401         .setxattr       = generic_setxattr,
 402         .getxattr       = generic_getxattr,
 403         .listxattr      = f2fs_listxattr,
 404         .removexattr    = generic_removexattr,
 405 #endif
 406 };
 407
 408 static void fill_zero(struct inode *inode, pgoff_t index,
 409                                         loff_t start, loff_t len)
 410 {
 411         struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
 412         struct page *page;
 413
 414         if (!len)
 415                 return;
 416
 417         f2fs_balance_fs(sbi);
 418
 419         f2fs_lock_op(sbi);
 420         page = get_new_data_page(inode, NULL, index, false);
 421         f2fs_unlock_op(sbi);
 422
 423         if (!IS_ERR(page)) {
 424                 wait_on_page_writeback(page);
 425                 zero_user(page, start, len);
 426                 set_page_dirty(page);
 427                 f2fs_put_page(page, 1);
 428         }
 429 }
 430
 431 int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end)
 432 {
 433         pgoff_t index;
 434         int err;
 435
 436         for (index = pg_start; index < pg_end; index++) {
 437                 struct dnode_of_data dn;
 438
 439                 set_new_dnode(&dn, inode, NULL, NULL, 0);
 440                 err = get_dnode_of_data(&dn, index, LOOKUP_NODE);
 441                 if (err) {
 442                         if (err == -ENOENT)
 443                                 continue;
 444                         return err;
 445                 }
 446
 447                 if (dn.data_blkaddr != NULL_ADDR)
 448                         truncate_data_blocks_range(&dn, 1);
 449                 f2fs_put_dnode(&dn);
 450         }
 451         return 0;
 452 }
 453
 454 static int punch_hole(struct inode *inode, loff_t offset, loff_t len)
 455 {
 456         pgoff_t pg_start, pg_end;
 457         loff_t off_start, off_end;
 458         int ret = 0;
 459
 460         ret = f2fs_convert_inline_data(inode, MAX_INLINE_DATA + 1);
 461         if (ret)
 462                 return ret;
 463
 464         pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT;
 465         pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT;
 466
 467         off_start = offset & (PAGE_CACHE_SIZE - 1);
 468         off_end = (offset + len) & (PAGE_CACHE_SIZE - 1);
 469
 470         if (pg_start == pg_end) {
 471                 fill_zero(inode, pg_start, off_start,
 472                                                 off_end - off_start);
 473         } else {
 474                 if (off_start)
 475                         fill_zero(inode, pg_start++, off_start,
 476                                         PAGE_CACHE_SIZE - off_start);
 477                 if (off_end)
 478                         fill_zero(inode, pg_end, 0, off_end);
 479
 480                 if (pg_start < pg_end) {
 481                         struct address_space *mapping = inode->i_mapping;
 482                         loff_t blk_start, blk_end;
 483                         struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
 484
 485                         f2fs_balance_fs(sbi);
 486
 487                         blk_start = pg_start << PAGE_CACHE_SHIFT;
 488                         blk_end = pg_end << PAGE_CACHE_SHIFT;
 489                         truncate_inode_pages_range(mapping, blk_start,
 490                                         blk_end - 1);
 491
 492                         f2fs_lock_op(sbi);
 493                         ret = truncate_hole(inode, pg_start, pg_end);
 494                         f2fs_unlock_op(sbi);
 495                 }
 496         }
 497
 498         return ret;
 499 }
 500
 501 static int expand_inode_data(struct inode *inode, loff_t offset,
 502                                         loff_t len, int mode)
 503 {
 504         struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
 505         pgoff_t index, pg_start, pg_end;
 506         loff_t new_size = i_size_read(inode);
 507         loff_t off_start, off_end;
 508         int ret = 0;
 509
 510         ret = inode_newsize_ok(inode, (len + offset));
 511         if (ret)
 512                 return ret;
 513
 514         ret = f2fs_convert_inline_data(inode, offset + len);
 515         if (ret)
 516                 return ret;
 517
 518         pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT;
 519         pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT;
 520
 521         off_start = offset & (PAGE_CACHE_SIZE - 1);
 522         off_end = (offset + len) & (PAGE_CACHE_SIZE - 1);
 523
 524         for (index = pg_start; index <= pg_end; index++) {
 525                 struct dnode_of_data dn;
 526
 527                 f2fs_lock_op(sbi);
 528                 set_new_dnode(&dn, inode, NULL, NULL, 0);
 529                 ret = f2fs_reserve_block(&dn, index);
 530                 f2fs_unlock_op(sbi);
 531                 if (ret)
 532                         break;
 533
 534                 if (pg_start == pg_end)
 535                         new_size = offset + len;
 536                 else if (index == pg_start && off_start)
 537                         new_size = (index + 1) << PAGE_CACHE_SHIFT;
 538                 else if (index == pg_end)
 539                         new_size = (index << PAGE_CACHE_SHIFT) + off_end;
 540                 else
 541                         new_size += PAGE_CACHE_SIZE;
 542         }
 543
 544         if (!(mode & FALLOC_FL_KEEP_SIZE) &&
 545                 i_size_read(inode) < new_size) {
 546                 i_size_write(inode, new_size);
 547                 mark_inode_dirty(inode);
 548         }
 549
 550         return ret;
 551 }
 552
 553 static long f2fs_fallocate(struct file *file, int mode,
 554                                 loff_t offset, loff_t len)
 555 {
 556         struct inode *inode = file_inode(file);
 557         long ret;
 558
 559         if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE))
 560                 return -EOPNOTSUPP;
 561
 562         if (mode & FALLOC_FL_PUNCH_HOLE)
 563                 ret = punch_hole(inode, offset, len);
 564         else
 565                 ret = expand_inode_data(inode, offset, len, mode);
 566
 567         if (!ret) {
 568                 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
 569                 mark_inode_dirty(inode);
 570         }
 571         trace_f2fs_fallocate(inode, mode, offset, len, ret);
 572         return ret;
 573 }
 574
 575 #define F2FS_REG_FLMASK         (~(FS_DIRSYNC_FL | FS_TOPDIR_FL))
 576 #define F2FS_OTHER_FLMASK       (FS_NODUMP_FL | FS_NOATIME_FL)
 577
 578 static inline __u32 f2fs_mask_flags(umode_t mode, __u32 flags)
 579 {
 580         if (S_ISDIR(mode))
 581                 return flags;
 582         else if (S_ISREG(mode))
 583                 return flags & F2FS_REG_FLMASK;
 584         else
 585                 return flags & F2FS_OTHER_FLMASK;
 586 }
 587
 588 long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 589 {
 590         struct inode *inode = file_inode(filp);
 591         struct f2fs_inode_info *fi = F2FS_I(inode);
 592         unsigned int flags;
 593         int ret;
 594
 595         switch (cmd) {
 596         case F2FS_IOC_GETFLAGS:
 597                 flags = fi->i_flags & FS_FL_USER_VISIBLE;
 598                 return put_user(flags, (int __user *) arg);
 599         case F2FS_IOC_SETFLAGS:
 600         {
 601                 unsigned int oldflags;
 602
 603                 ret = mnt_want_write_file(filp);
 604                 if (ret)
 605                         return ret;
 606
 607                 if (!inode_owner_or_capable(inode)) {
 608                         ret = -EACCES;
 609                         goto out;
 610                 }
 611
 612                 if (get_user(flags, (int __user *) arg)) {
 613                         ret = -EFAULT;
 614                         goto out;
 615                 }
 616
 617                 flags = f2fs_mask_flags(inode->i_mode, flags);
 618
 619                 mutex_lock(&inode->i_mutex);
 620
 621                 oldflags = fi->i_flags;
 622
 623                 if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) {
 624                         if (!capable(CAP_LINUX_IMMUTABLE)) {
 625                                 mutex_unlock(&inode->i_mutex);
 626                                 ret = -EPERM;
 627                                 goto out;
 628                         }
 629                 }
 630
 631                 flags = flags & FS_FL_USER_MODIFIABLE;
 632                 flags |= oldflags & ~FS_FL_USER_MODIFIABLE;
 633                 fi->i_flags = flags;
 634                 mutex_unlock(&inode->i_mutex);
 635
 636                 f2fs_set_inode_flags(inode);
 637                 inode->i_ctime = CURRENT_TIME;
 638                 mark_inode_dirty(inode);
 639 out:
 640                 mnt_drop_write_file(filp);
 641                 return ret;
 642         }
 643         default:
 644                 return -ENOTTY;
 645         }
 646 }
 647
 648 #ifdef CONFIG_COMPAT
 649 long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 650 {
 651         switch (cmd) {
 652         case F2FS_IOC32_GETFLAGS:
 653                 cmd = F2FS_IOC_GETFLAGS;
 654                 break;
 655         case F2FS_IOC32_SETFLAGS:
 656                 cmd = F2FS_IOC_SETFLAGS;
 657                 break;
 658         default:
 659                 return -ENOIOCTLCMD;
 660         }
 661         return f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
 662 }
 663 #endif
 664
 665 const struct file_operations f2fs_file_operations = {
 666         .llseek         = generic_file_llseek,
 667         .read           = do_sync_read,
 668         .write          = do_sync_write,
 669         .aio_read       = generic_file_aio_read,
 670         .aio_write      = generic_file_aio_write,
 671         .open           = generic_file_open,
 672         .mmap           = f2fs_file_mmap,
 673         .fsync          = f2fs_sync_file,
 674         .fallocate      = f2fs_fallocate,
 675         .unlocked_ioctl = f2fs_ioctl,
 676 #ifdef CONFIG_COMPAT
 677         .compat_ioctl   = f2fs_compat_ioctl,
 678 #endif
 679         .splice_read    = generic_file_splice_read,
 680         .splice_write   = generic_file_splice_write,
 681 };