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         f2fs_wait_on_page_writeback(page, DATA);
  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         .map_pages      = filemap_map_pages,
  88         .page_mkwrite   = f2fs_vm_page_mkwrite,
  89         .remap_pages    = generic_file_remap_pages,
  90 };
  91
  92 static int get_parent_ino(struct inode *inode, nid_t *pino)
  93 {
  94         struct dentry *dentry;
  95
  96         inode = igrab(inode);
  97         dentry = d_find_any_alias(inode);
  98         iput(inode);
  99         if (!dentry)
 100                 return 0;
 101
 102         if (update_dent_inode(inode, &dentry->d_name)) {
 103                 dput(dentry);
 104                 return 0;
 105         }
 106
 107         *pino = parent_ino(dentry);
 108         dput(dentry);
 109         return 1;
 110 }
 111
 112 int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
 113 {
 114         struct inode *inode = file->f_mapping->host;
 115         struct f2fs_inode_info *fi = F2FS_I(inode);
 116         struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
 117         int ret = 0;
 118         bool need_cp = false;
 119         struct writeback_control wbc = {
 120                 .sync_mode = WB_SYNC_ALL,
 121                 .nr_to_write = LONG_MAX,
 122                 .for_reclaim = 0,
 123         };
 124
 125         if (unlikely(f2fs_readonly(inode->i_sb)))
 126                 return 0;
 127
 128         trace_f2fs_sync_file_enter(inode);
 129         ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
 130         if (ret) {
 131                 trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret);
 132                 return ret;
 133         }
 134
 135         /* guarantee free sections for fsync */
 136         f2fs_balance_fs(sbi);
 137
 138         down_read(&fi->i_sem);
 139
 140         /*
 141          * Both of fdatasync() and fsync() are able to be recovered from
 142          * sudden-power-off.
 143          */
 144         if (!S_ISREG(inode->i_mode) || inode->i_nlink != 1)
 145                 need_cp = true;
 146         else if (file_wrong_pino(inode))
 147                 need_cp = true;
 148         else if (!space_for_roll_forward(sbi))
 149                 need_cp = true;
 150         else if (!is_checkpointed_node(sbi, F2FS_I(inode)->i_pino))
 151                 need_cp = true;
 152         else if (F2FS_I(inode)->xattr_ver == cur_cp_version(F2FS_CKPT(sbi)))
 153                 need_cp = true;
 154
 155         up_read(&fi->i_sem);
 156
 157         if (need_cp) {
 158                 nid_t pino;
 159
 160                 /* all the dirty node pages should be flushed for POR */
 161                 ret = f2fs_sync_fs(inode->i_sb, 1);
 162
 163                 down_write(&fi->i_sem);
 164                 F2FS_I(inode)->xattr_ver = 0;
 165                 if (file_wrong_pino(inode) && inode->i_nlink == 1 &&
 166                                         get_parent_ino(inode, &pino)) {
 167                         F2FS_I(inode)->i_pino = pino;
 168                         file_got_pino(inode);
 169                         up_write(&fi->i_sem);
 170                         mark_inode_dirty_sync(inode);
 171                         ret = f2fs_write_inode(inode, NULL);
 172                         if (ret)
 173                                 goto out;
 174                 } else {
 175                         up_write(&fi->i_sem);
 176                 }
 177         } else {
 178                 /* if there is no written node page, write its inode page */
 179                 while (!sync_node_pages(sbi, inode->i_ino, &wbc)) {
 180                         if (fsync_mark_done(sbi, inode->i_ino))
 181                                 goto out;
 182                         mark_inode_dirty_sync(inode);
 183                         ret = f2fs_write_inode(inode, NULL);
 184                         if (ret)
 185                                 goto out;
 186                 }
 187                 ret = wait_on_node_pages_writeback(sbi, inode->i_ino);
 188                 if (ret)
 189                         goto out;
 190                 ret = f2fs_issue_flush(F2FS_SB(inode->i_sb));
 191         }
 192 out:
 193         trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret);
 194         return ret;
 195 }
 196
 197 static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma)
 198 {
 199         file_accessed(file);
 200         vma->vm_ops = &f2fs_file_vm_ops;
 201         return 0;
 202 }
 203
 204 int truncate_data_blocks_range(struct dnode_of_data *dn, int count)
 205 {
 206         int nr_free = 0, ofs = dn->ofs_in_node;
 207         struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb);
 208         struct f2fs_node *raw_node;
 209         __le32 *addr;
 210
 211         raw_node = F2FS_NODE(dn->node_page);
 212         addr = blkaddr_in_node(raw_node) + ofs;
 213
 214         for (; count > 0; count--, addr++, dn->ofs_in_node++) {
 215                 block_t blkaddr = le32_to_cpu(*addr);
 216                 if (blkaddr == NULL_ADDR)
 217                         continue;
 218
 219                 update_extent_cache(NULL_ADDR, dn);
 220                 invalidate_blocks(sbi, blkaddr);
 221                 nr_free++;
 222         }
 223         if (nr_free) {
 224                 dec_valid_block_count(sbi, dn->inode, nr_free);
 225                 set_page_dirty(dn->node_page);
 226                 sync_inode_page(dn);
 227         }
 228         dn->ofs_in_node = ofs;
 229
 230         trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid,
 231                                          dn->ofs_in_node, nr_free);
 232         return nr_free;
 233 }
 234
 235 void truncate_data_blocks(struct dnode_of_data *dn)
 236 {
 237         truncate_data_blocks_range(dn, ADDRS_PER_BLOCK);
 238 }
 239
 240 static void truncate_partial_data_page(struct inode *inode, u64 from)
 241 {
 242         unsigned offset = from & (PAGE_CACHE_SIZE - 1);
 243         struct page *page;
 244
 245         if (!offset)
 246                 return;
 247
 248         page = find_data_page(inode, from >> PAGE_CACHE_SHIFT, false);
 249         if (IS_ERR(page))
 250                 return;
 251
 252         lock_page(page);
 253         if (unlikely(page->mapping != inode->i_mapping)) {
 254                 f2fs_put_page(page, 1);
 255                 return;
 256         }
 257         f2fs_wait_on_page_writeback(page, DATA);
 258         zero_user(page, offset, PAGE_CACHE_SIZE - offset);
 259         set_page_dirty(page);
 260         f2fs_put_page(page, 1);
 261 }
 262
 263 int truncate_blocks(struct inode *inode, u64 from)
 264 {
 265         struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
 266         unsigned int blocksize = inode->i_sb->s_blocksize;
 267         struct dnode_of_data dn;
 268         pgoff_t free_from;
 269         int count = 0, err = 0;
 270
 271         trace_f2fs_truncate_blocks_enter(inode, from);
 272
 273         if (f2fs_has_inline_data(inode))
 274                 goto done;
 275
 276         free_from = (pgoff_t)
 277                         ((from + blocksize - 1) >> (sbi->log_blocksize));
 278
 279         f2fs_lock_op(sbi);
 280
 281         set_new_dnode(&dn, inode, NULL, NULL, 0);
 282         err = get_dnode_of_data(&dn, free_from, LOOKUP_NODE);
 283         if (err) {
 284                 if (err == -ENOENT)
 285                         goto free_next;
 286                 f2fs_unlock_op(sbi);
 287                 trace_f2fs_truncate_blocks_exit(inode, err);
 288                 return err;
 289         }
 290
 291         if (IS_INODE(dn.node_page))
 292                 count = ADDRS_PER_INODE(F2FS_I(inode));
 293         else
 294                 count = ADDRS_PER_BLOCK;
 295
 296         count -= dn.ofs_in_node;
 297         f2fs_bug_on(count < 0);
 298
 299         if (dn.ofs_in_node || IS_INODE(dn.node_page)) {
 300                 truncate_data_blocks_range(&dn, count);
 301                 free_from += count;
 302         }
 303
 304         f2fs_put_dnode(&dn);
 305 free_next:
 306         err = truncate_inode_blocks(inode, free_from);
 307         f2fs_unlock_op(sbi);
 308 done:
 309         /* lastly zero out the first data page */
 310         truncate_partial_data_page(inode, from);
 311
 312         trace_f2fs_truncate_blocks_exit(inode, err);
 313         return err;
 314 }
 315
 316 void f2fs_truncate(struct inode *inode)
 317 {
 318         if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
 319                                 S_ISLNK(inode->i_mode)))
 320                 return;
 321
 322         trace_f2fs_truncate(inode);
 323
 324         if (!truncate_blocks(inode, i_size_read(inode))) {
 325                 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
 326                 mark_inode_dirty(inode);
 327         }
 328 }
 329
 330 int f2fs_getattr(struct vfsmount *mnt,
 331                          struct dentry *dentry, struct kstat *stat)
 332 {
 333         struct inode *inode = dentry->d_inode;
 334         generic_fillattr(inode, stat);
 335         stat->blocks <<= 3;
 336         return 0;
 337 }
 338
 339 #ifdef CONFIG_F2FS_FS_POSIX_ACL
 340 static void __setattr_copy(struct inode *inode, const struct iattr *attr)
 341 {
 342         struct f2fs_inode_info *fi = F2FS_I(inode);
 343         unsigned int ia_valid = attr->ia_valid;
 344
 345         if (ia_valid & ATTR_UID)
 346                 inode->i_uid = attr->ia_uid;
 347         if (ia_valid & ATTR_GID)
 348                 inode->i_gid = attr->ia_gid;
 349         if (ia_valid & ATTR_ATIME)
 350                 inode->i_atime = timespec_trunc(attr->ia_atime,
 351                                                 inode->i_sb->s_time_gran);
 352         if (ia_valid & ATTR_MTIME)
 353                 inode->i_mtime = timespec_trunc(attr->ia_mtime,
 354                                                 inode->i_sb->s_time_gran);
 355         if (ia_valid & ATTR_CTIME)
 356                 inode->i_ctime = timespec_trunc(attr->ia_ctime,
 357                                                 inode->i_sb->s_time_gran);
 358         if (ia_valid & ATTR_MODE) {
 359                 umode_t mode = attr->ia_mode;
 360
 361                 if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
 362                         mode &= ~S_ISGID;
 363                 set_acl_inode(fi, mode);
 364         }
 365 }
 366 #else
 367 #define __setattr_copy setattr_copy
 368 #endif
 369
 370 int f2fs_setattr(struct dentry *dentry, struct iattr *attr)
 371 {
 372         struct inode *inode = dentry->d_inode;
 373         struct f2fs_inode_info *fi = F2FS_I(inode);
 374         int err;
 375
 376         err = inode_change_ok(inode, attr);
 377         if (err)
 378                 return err;
 379
 380         if ((attr->ia_valid & ATTR_SIZE) &&
 381                         attr->ia_size != i_size_read(inode)) {
 382                 err = f2fs_convert_inline_data(inode, attr->ia_size);
 383                 if (err)
 384                         return err;
 385
 386                 truncate_setsize(inode, attr->ia_size);
 387                 f2fs_truncate(inode);
 388                 f2fs_balance_fs(F2FS_SB(inode->i_sb));
 389         }
 390
 391         __setattr_copy(inode, attr);
 392
 393         if (attr->ia_valid & ATTR_MODE) {
 394                 err = posix_acl_chmod(inode, get_inode_mode(inode));
 395                 if (err || is_inode_flag_set(fi, FI_ACL_MODE)) {
 396                         inode->i_mode = fi->i_acl_mode;
 397                         clear_inode_flag(fi, FI_ACL_MODE);
 398                 }
 399         }
 400
 401         mark_inode_dirty(inode);
 402         return err;
 403 }
 404
 405 const struct inode_operations f2fs_file_inode_operations = {
 406         .getattr        = f2fs_getattr,
 407         .setattr        = f2fs_setattr,
 408         .get_acl        = f2fs_get_acl,
 409         .set_acl        = f2fs_set_acl,
 410 #ifdef CONFIG_F2FS_FS_XATTR
 411         .setxattr       = generic_setxattr,
 412         .getxattr       = generic_getxattr,
 413         .listxattr      = f2fs_listxattr,
 414         .removexattr    = generic_removexattr,
 415 #endif
 416 };
 417
 418 static void fill_zero(struct inode *inode, pgoff_t index,
 419                                         loff_t start, loff_t len)
 420 {
 421         struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
 422         struct page *page;
 423
 424         if (!len)
 425                 return;
 426
 427         f2fs_balance_fs(sbi);
 428
 429         f2fs_lock_op(sbi);
 430         page = get_new_data_page(inode, NULL, index, false);
 431         f2fs_unlock_op(sbi);
 432
 433         if (!IS_ERR(page)) {
 434                 f2fs_wait_on_page_writeback(page, DATA);
 435                 zero_user(page, start, len);
 436                 set_page_dirty(page);
 437                 f2fs_put_page(page, 1);
 438         }
 439 }
 440
 441 int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end)
 442 {
 443         pgoff_t index;
 444         int err;
 445
 446         for (index = pg_start; index < pg_end; index++) {
 447                 struct dnode_of_data dn;
 448
 449                 set_new_dnode(&dn, inode, NULL, NULL, 0);
 450                 err = get_dnode_of_data(&dn, index, LOOKUP_NODE);
 451                 if (err) {
 452                         if (err == -ENOENT)
 453                                 continue;
 454                         return err;
 455                 }
 456
 457                 if (dn.data_blkaddr != NULL_ADDR)
 458                         truncate_data_blocks_range(&dn, 1);
 459                 f2fs_put_dnode(&dn);
 460         }
 461         return 0;
 462 }
 463
 464 static int punch_hole(struct inode *inode, loff_t offset, loff_t len)
 465 {
 466         pgoff_t pg_start, pg_end;
 467         loff_t off_start, off_end;
 468         int ret = 0;
 469
 470         ret = f2fs_convert_inline_data(inode, MAX_INLINE_DATA + 1);
 471         if (ret)
 472                 return ret;
 473
 474         pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT;
 475         pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT;
 476
 477         off_start = offset & (PAGE_CACHE_SIZE - 1);
 478         off_end = (offset + len) & (PAGE_CACHE_SIZE - 1);
 479
 480         if (pg_start == pg_end) {
 481                 fill_zero(inode, pg_start, off_start,
 482                                                 off_end - off_start);
 483         } else {
 484                 if (off_start)
 485                         fill_zero(inode, pg_start++, off_start,
 486                                         PAGE_CACHE_SIZE - off_start);
 487                 if (off_end)
 488                         fill_zero(inode, pg_end, 0, off_end);
 489
 490                 if (pg_start < pg_end) {
 491                         struct address_space *mapping = inode->i_mapping;
 492                         loff_t blk_start, blk_end;
 493                         struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
 494
 495                         f2fs_balance_fs(sbi);
 496
 497                         blk_start = pg_start << PAGE_CACHE_SHIFT;
 498                         blk_end = pg_end << PAGE_CACHE_SHIFT;
 499                         truncate_inode_pages_range(mapping, blk_start,
 500                                         blk_end - 1);
 501
 502                         f2fs_lock_op(sbi);
 503                         ret = truncate_hole(inode, pg_start, pg_end);
 504                         f2fs_unlock_op(sbi);
 505                 }
 506         }
 507
 508         return ret;
 509 }
 510
 511 static int expand_inode_data(struct inode *inode, loff_t offset,
 512                                         loff_t len, int mode)
 513 {
 514         struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
 515         pgoff_t index, pg_start, pg_end;
 516         loff_t new_size = i_size_read(inode);
 517         loff_t off_start, off_end;
 518         int ret = 0;
 519
 520         ret = inode_newsize_ok(inode, (len + offset));
 521         if (ret)
 522                 return ret;
 523
 524         ret = f2fs_convert_inline_data(inode, offset + len);
 525         if (ret)
 526                 return ret;
 527
 528         pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT;
 529         pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT;
 530
 531         off_start = offset & (PAGE_CACHE_SIZE - 1);
 532         off_end = (offset + len) & (PAGE_CACHE_SIZE - 1);
 533
 534         for (index = pg_start; index <= pg_end; index++) {
 535                 struct dnode_of_data dn;
 536
 537                 f2fs_lock_op(sbi);
 538                 set_new_dnode(&dn, inode, NULL, NULL, 0);
 539                 ret = f2fs_reserve_block(&dn, index);
 540                 f2fs_unlock_op(sbi);
 541                 if (ret)
 542                         break;
 543
 544                 if (pg_start == pg_end)
 545                         new_size = offset + len;
 546                 else if (index == pg_start && off_start)
 547                         new_size = (index + 1) << PAGE_CACHE_SHIFT;
 548                 else if (index == pg_end)
 549                         new_size = (index << PAGE_CACHE_SHIFT) + off_end;
 550                 else
 551                         new_size += PAGE_CACHE_SIZE;
 552         }
 553
 554         if (!(mode & FALLOC_FL_KEEP_SIZE) &&
 555                 i_size_read(inode) < new_size) {
 556                 i_size_write(inode, new_size);
 557                 mark_inode_dirty(inode);
 558         }
 559
 560         return ret;
 561 }
 562
 563 static long f2fs_fallocate(struct file *file, int mode,
 564                                 loff_t offset, loff_t len)
 565 {
 566         struct inode *inode = file_inode(file);
 567         long ret;
 568
 569         if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE))
 570                 return -EOPNOTSUPP;
 571
 572         mutex_lock(&inode->i_mutex);
 573
 574         if (mode & FALLOC_FL_PUNCH_HOLE)
 575                 ret = punch_hole(inode, offset, len);
 576         else
 577                 ret = expand_inode_data(inode, offset, len, mode);
 578
 579         if (!ret) {
 580                 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
 581                 mark_inode_dirty(inode);
 582         }
 583
 584         mutex_unlock(&inode->i_mutex);
 585
 586         trace_f2fs_fallocate(inode, mode, offset, len, ret);
 587         return ret;
 588 }
 589
 590 #define F2FS_REG_FLMASK         (~(FS_DIRSYNC_FL | FS_TOPDIR_FL))
 591 #define F2FS_OTHER_FLMASK       (FS_NODUMP_FL | FS_NOATIME_FL)
 592
 593 static inline __u32 f2fs_mask_flags(umode_t mode, __u32 flags)
 594 {
 595         if (S_ISDIR(mode))
 596                 return flags;
 597         else if (S_ISREG(mode))
 598                 return flags & F2FS_REG_FLMASK;
 599         else
 600                 return flags & F2FS_OTHER_FLMASK;
 601 }
 602
 603 long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 604 {
 605         struct inode *inode = file_inode(filp);
 606         struct f2fs_inode_info *fi = F2FS_I(inode);
 607         unsigned int flags;
 608         int ret;
 609
 610         switch (cmd) {
 611         case F2FS_IOC_GETFLAGS:
 612                 flags = fi->i_flags & FS_FL_USER_VISIBLE;
 613                 return put_user(flags, (int __user *) arg);
 614         case F2FS_IOC_SETFLAGS:
 615         {
 616                 unsigned int oldflags;
 617
 618                 ret = mnt_want_write_file(filp);
 619                 if (ret)
 620                         return ret;
 621
 622                 if (!inode_owner_or_capable(inode)) {
 623                         ret = -EACCES;
 624                         goto out;
 625                 }
 626
 627                 if (get_user(flags, (int __user *) arg)) {
 628                         ret = -EFAULT;
 629                         goto out;
 630                 }
 631
 632                 flags = f2fs_mask_flags(inode->i_mode, flags);
 633
 634                 mutex_lock(&inode->i_mutex);
 635
 636                 oldflags = fi->i_flags;
 637
 638                 if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) {
 639                         if (!capable(CAP_LINUX_IMMUTABLE)) {
 640                                 mutex_unlock(&inode->i_mutex);
 641                                 ret = -EPERM;
 642                                 goto out;
 643                         }
 644                 }
 645
 646                 flags = flags & FS_FL_USER_MODIFIABLE;
 647                 flags |= oldflags & ~FS_FL_USER_MODIFIABLE;
 648                 fi->i_flags = flags;
 649                 mutex_unlock(&inode->i_mutex);
 650
 651                 f2fs_set_inode_flags(inode);
 652                 inode->i_ctime = CURRENT_TIME;
 653                 mark_inode_dirty(inode);
 654 out:
 655                 mnt_drop_write_file(filp);
 656                 return ret;
 657         }
 658         default:
 659                 return -ENOTTY;
 660         }
 661 }
 662
 663 #ifdef CONFIG_COMPAT
 664 long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 665 {
 666         switch (cmd) {
 667         case F2FS_IOC32_GETFLAGS:
 668                 cmd = F2FS_IOC_GETFLAGS;
 669                 break;
 670         case F2FS_IOC32_SETFLAGS:
 671                 cmd = F2FS_IOC_SETFLAGS;
 672                 break;
 673         default:
 674                 return -ENOIOCTLCMD;
 675         }
 676         return f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
 677 }
 678 #endif
 679
 680 const struct file_operations f2fs_file_operations = {
 681         .llseek         = generic_file_llseek,
 682         .read           = do_sync_read,
 683         .write          = do_sync_write,
 684         .aio_read       = generic_file_aio_read,
 685         .aio_write      = generic_file_aio_write,
 686         .open           = generic_file_open,
 687         .mmap           = f2fs_file_mmap,
 688         .fsync          = f2fs_sync_file,
 689         .fallocate      = f2fs_fallocate,
 690         .unlocked_ioctl = f2fs_ioctl,
 691 #ifdef CONFIG_COMPAT
 692         .compat_ioctl   = f2fs_compat_ioctl,
 693 #endif
 694         .splice_read    = generic_file_splice_read,
 695         .splice_write   = generic_file_splice_write,
 696 };