fs/ext4/file.c

   1 /*
   2  *  linux/fs/ext4/file.c
   3  *
   4  * Copyright (C) 1992, 1993, 1994, 1995
   5  * Remy Card (card@masi.ibp.fr)
   6  * Laboratoire MASI - Institut Blaise Pascal
   7  * Universite Pierre et Marie Curie (Paris VI)
   8  *
   9  *  from
  10  *
  11  *  linux/fs/minix/file.c
  12  *
  13  *  Copyright (C) 1991, 1992  Linus Torvalds
  14  *
  15  *  ext4 fs regular file handling primitives
  16  *
  17  *  64-bit file support on 64-bit platforms by Jakub Jelinek
  18  *      (jj@sunsite.ms.mff.cuni.cz)
  19  */
  20
  21 #include <linux/time.h>
  22 #include <linux/fs.h>
  23 #include <linux/jbd2.h>
  24 #include <linux/mount.h>
  25 #include <linux/path.h>
  26 #include <linux/quotaops.h>
  27 #include <linux/pagevec.h>
  28 #include <linux/uio.h>
  29 #include "ext4.h"
  30 #include "ext4_jbd2.h"
  31 #include "xattr.h"
  32 #include "acl.h"
  33
  34 /*
  35  * Called when an inode is released. Note that this is different
  36  * from ext4_file_open: open gets called at every open, but release
  37  * gets called only when /all/ the files are closed.
  38  */
  39 static int ext4_release_file(struct inode *inode, struct file *filp)
  40 {
  41         if (ext4_test_inode_state(inode, EXT4_STATE_DA_ALLOC_CLOSE)) {
  42                 ext4_alloc_da_blocks(inode);
  43                 ext4_clear_inode_state(inode, EXT4_STATE_DA_ALLOC_CLOSE);
  44         }
  45         /* if we are the last writer on the inode, drop the block reservation */
  46         if ((filp->f_mode & FMODE_WRITE) &&
  47                         (atomic_read(&inode->i_writecount) == 1) &&
  48                         !EXT4_I(inode)->i_reserved_data_blocks)
  49         {
  50                 down_write(&EXT4_I(inode)->i_data_sem);
  51                 ext4_discard_preallocations(inode);
  52                 up_write(&EXT4_I(inode)->i_data_sem);
  53         }
  54         if (is_dx(inode) && filp->private_data)
  55                 ext4_htree_free_dir_info(filp->private_data);
  56
  57         return 0;
  58 }
  59
  60 static void ext4_unwritten_wait(struct inode *inode)
  61 {
  62         wait_queue_head_t *wq = ext4_ioend_wq(inode);
  63
  64         wait_event(*wq, (atomic_read(&EXT4_I(inode)->i_unwritten) == 0));
  65 }
  66
  67 /*
  68  * This tests whether the IO in question is block-aligned or not.
  69  * Ext4 utilizes unwritten extents when hole-filling during direct IO, and they
  70  * are converted to written only after the IO is complete.  Until they are
  71  * mapped, these blocks appear as holes, so dio_zero_block() will assume that
  72  * it needs to zero out portions of the start and/or end block.  If 2 AIO
  73  * threads are at work on the same unwritten block, they must be synchronized
  74  * or one thread will zero the other's data, causing corruption.
  75  */
  76 static int
  77 ext4_unaligned_aio(struct inode *inode, struct iov_iter *from, loff_t pos)
  78 {
  79         struct super_block *sb = inode->i_sb;
  80         int blockmask = sb->s_blocksize - 1;
  81
  82         if (pos >= i_size_read(inode))
  83                 return 0;
  84
  85         if ((pos | iov_iter_alignment(from)) & blockmask)
  86                 return 1;
  87
  88         return 0;
  89 }
  90
  91 static ssize_t
  92 ext4_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
  93 {
  94         struct file *file = iocb->ki_filp;
  95         struct inode *inode = file_inode(iocb->ki_filp);
  96         struct mutex *aio_mutex = NULL;
  97         struct blk_plug plug;
  98         int o_direct = io_is_direct(file);
  99         int overwrite = 0;
 100         size_t length = iov_iter_count(from);
 101         ssize_t ret;
 102         loff_t pos = iocb->ki_pos;
 103
 104         /*
 105          * Unaligned direct AIO must be serialized; see comment above
 106          * In the case of O_APPEND, assume that we must always serialize
 107          */
 108         if (o_direct &&
 109             ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS) &&
 110             !is_sync_kiocb(iocb) &&
 111             (file->f_flags & O_APPEND ||
 112              ext4_unaligned_aio(inode, from, pos))) {
 113                 aio_mutex = ext4_aio_mutex(inode);
 114                 mutex_lock(aio_mutex);
 115                 ext4_unwritten_wait(inode);
 116         }
 117
 118         mutex_lock(&inode->i_mutex);
 119         if (file->f_flags & O_APPEND)
 120                 iocb->ki_pos = pos = i_size_read(inode);
 121
 122         /*
 123          * If we have encountered a bitmap-format file, the size limit
 124          * is smaller than s_maxbytes, which is for extent-mapped files.
 125          */
 126         if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))) {
 127                 struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
 128
 129                 if ((pos > sbi->s_bitmap_maxbytes) ||
 130                     (pos == sbi->s_bitmap_maxbytes && length > 0)) {
 131                         mutex_unlock(&inode->i_mutex);
 132                         ret = -EFBIG;
 133                         goto errout;
 134                 }
 135                 iov_iter_truncate(from, sbi->s_bitmap_maxbytes - pos);
 136                 length = iov_iter_count(from);
 137         }
 138
 139         iocb->private = &overwrite;
 140         if (o_direct) {
 141                 blk_start_plug(&plug);
 142
 143
 144                 /* check whether we do a DIO overwrite or not */
 145                 if (ext4_should_dioread_nolock(inode) && !aio_mutex &&
 146                     !file->f_mapping->nrpages && pos + length <= i_size_read(inode)) {
 147                         struct ext4_map_blocks map;
 148                         unsigned int blkbits = inode->i_blkbits;
 149                         int err, len;
 150
 151                         map.m_lblk = pos >> blkbits;
 152                         map.m_len = (EXT4_BLOCK_ALIGN(pos + length, blkbits) >> blkbits)
 153                                 - map.m_lblk;
 154                         len = map.m_len;
 155
 156                         err = ext4_map_blocks(NULL, inode, &map, 0);
 157                         /*
 158                          * 'err==len' means that all of blocks has
 159                          * been preallocated no matter they are
 160                          * initialized or not.  For excluding
 161                          * unwritten extents, we need to check
 162                          * m_flags.  There are two conditions that
 163                          * indicate for initialized extents.  1) If we
 164                          * hit extent cache, EXT4_MAP_MAPPED flag is
 165                          * returned; 2) If we do a real lookup,
 166                          * non-flags are returned.  So we should check
 167                          * these two conditions.
 168                          */
 169                         if (err == len && (map.m_flags & EXT4_MAP_MAPPED))
 170                                 overwrite = 1;
 171                 }
 172         }
 173
 174         ret = generic_write_checks(file, &iocb->ki_pos, &length);
 175         if (ret)
 176                 goto out;
 177
 178         if (length == 0)
 179                 goto out;
 180
 181         iov_iter_truncate(from, length);
 182         ret = __generic_file_write_iter(iocb, from);
 183 out:
 184         mutex_unlock(&inode->i_mutex);
 185
 186         if (ret > 0) {
 187                 ssize_t err;
 188
 189                 err = generic_write_sync(file, iocb->ki_pos - ret, ret);
 190                 if (err < 0)
 191                         ret = err;
 192         }
 193         if (o_direct)
 194                 blk_finish_plug(&plug);
 195
 196 errout:
 197         if (aio_mutex)
 198                 mutex_unlock(aio_mutex);
 199         return ret;
 200 }
 201
 202 #ifdef CONFIG_FS_DAX
 203 static int ext4_dax_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
 204 {
 205         return dax_fault(vma, vmf, ext4_get_block);
 206                                         /* Is this the right get_block? */
 207 }
 208
 209 static int ext4_dax_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
 210 {
 211         return dax_mkwrite(vma, vmf, ext4_get_block);
 212 }
 213
 214 static const struct vm_operations_struct ext4_dax_vm_ops = {
 215         .fault          = ext4_dax_fault,
 216         .page_mkwrite   = ext4_dax_mkwrite,
 217 };
 218 #else
 219 #define ext4_dax_vm_ops ext4_file_vm_ops
 220 #endif
 221
 222 static const struct vm_operations_struct ext4_file_vm_ops = {
 223         .fault          = filemap_fault,
 224         .map_pages      = filemap_map_pages,
 225         .page_mkwrite   = ext4_page_mkwrite,
 226 };
 227
 228 static int ext4_file_mmap(struct file *file, struct vm_area_struct *vma)
 229 {
 230         file_accessed(file);
 231         if (IS_DAX(file_inode(file))) {
 232                 vma->vm_ops = &ext4_dax_vm_ops;
 233                 vma->vm_flags |= VM_MIXEDMAP;
 234         } else {
 235                 vma->vm_ops = &ext4_file_vm_ops;
 236         }
 237         return 0;
 238 }
 239
 240 static int ext4_file_open(struct inode * inode, struct file * filp)
 241 {
 242         struct super_block *sb = inode->i_sb;
 243         struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
 244         struct vfsmount *mnt = filp->f_path.mnt;
 245         struct path path;
 246         char buf[64], *cp;
 247
 248         if (unlikely(!(sbi->s_mount_flags & EXT4_MF_MNTDIR_SAMPLED) &&
 249                      !(sb->s_flags & MS_RDONLY))) {
 250                 sbi->s_mount_flags |= EXT4_MF_MNTDIR_SAMPLED;
 251                 /*
 252                  * Sample where the filesystem has been mounted and
 253                  * store it in the superblock for sysadmin convenience
 254                  * when trying to sort through large numbers of block
 255                  * devices or filesystem images.
 256                  */
 257                 memset(buf, 0, sizeof(buf));
 258                 path.mnt = mnt;
 259                 path.dentry = mnt->mnt_root;
 260                 cp = d_path(&path, buf, sizeof(buf));
 261                 if (!IS_ERR(cp)) {
 262                         handle_t *handle;
 263                         int err;
 264
 265                         handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1);
 266                         if (IS_ERR(handle))
 267                                 return PTR_ERR(handle);
 268                         BUFFER_TRACE(sbi->s_sbh, "get_write_access");
 269                         err = ext4_journal_get_write_access(handle, sbi->s_sbh);
 270                         if (err) {
 271                                 ext4_journal_stop(handle);
 272                                 return err;
 273                         }
 274                         strlcpy(sbi->s_es->s_last_mounted, cp,
 275                                 sizeof(sbi->s_es->s_last_mounted));
 276                         ext4_handle_dirty_super(handle, sb);
 277                         ext4_journal_stop(handle);
 278                 }
 279         }
 280         /*
 281          * Set up the jbd2_inode if we are opening the inode for
 282          * writing and the journal is present
 283          */
 284         if (filp->f_mode & FMODE_WRITE) {
 285                 int ret = ext4_inode_attach_jinode(inode);
 286                 if (ret < 0)
 287                         return ret;
 288         }
 289         return dquot_file_open(inode, filp);
 290 }
 291
 292 /*
 293  * Here we use ext4_map_blocks() to get a block mapping for a extent-based
 294  * file rather than ext4_ext_walk_space() because we can introduce
 295  * SEEK_DATA/SEEK_HOLE for block-mapped and extent-mapped file at the same
 296  * function.  When extent status tree has been fully implemented, it will
 297  * track all extent status for a file and we can directly use it to
 298  * retrieve the offset for SEEK_DATA/SEEK_HOLE.
 299  */
 300
 301 /*
 302  * When we retrieve the offset for SEEK_DATA/SEEK_HOLE, we would need to
 303  * lookup page cache to check whether or not there has some data between
 304  * [startoff, endoff] because, if this range contains an unwritten extent,
 305  * we determine this extent as a data or a hole according to whether the
 306  * page cache has data or not.
 307  */
 308 static int ext4_find_unwritten_pgoff(struct inode *inode,
 309                                      int whence,
 310                                      struct ext4_map_blocks *map,
 311                                      loff_t *offset)
 312 {
 313         struct pagevec pvec;
 314         unsigned int blkbits;
 315         pgoff_t index;
 316         pgoff_t end;
 317         loff_t endoff;
 318         loff_t startoff;
 319         loff_t lastoff;
 320         int found = 0;
 321
 322         blkbits = inode->i_sb->s_blocksize_bits;
 323         startoff = *offset;
 324         lastoff = startoff;
 325         endoff = (loff_t)(map->m_lblk + map->m_len) << blkbits;
 326
 327         index = startoff >> PAGE_CACHE_SHIFT;
 328         end = endoff >> PAGE_CACHE_SHIFT;
 329
 330         pagevec_init(&pvec, 0);
 331         do {
 332                 int i, num;
 333                 unsigned long nr_pages;
 334
 335                 num = min_t(pgoff_t, end - index, PAGEVEC_SIZE);
 336                 nr_pages = pagevec_lookup(&pvec, inode->i_mapping, index,
 337                                           (pgoff_t)num);
 338                 if (nr_pages == 0) {
 339                         if (whence == SEEK_DATA)
 340                                 break;
 341
 342                         BUG_ON(whence != SEEK_HOLE);
 343                         /*
 344                          * If this is the first time to go into the loop and
 345                          * offset is not beyond the end offset, it will be a
 346                          * hole at this offset
 347                          */
 348                         if (lastoff == startoff || lastoff < endoff)
 349                                 found = 1;
 350                         break;
 351                 }
 352
 353                 /*
 354                  * If this is the first time to go into the loop and
 355                  * offset is smaller than the first page offset, it will be a
 356                  * hole at this offset.
 357                  */
 358                 if (lastoff == startoff && whence == SEEK_HOLE &&
 359                     lastoff < page_offset(pvec.pages[0])) {
 360                         found = 1;
 361                         break;
 362                 }
 363
 364                 for (i = 0; i < nr_pages; i++) {
 365                         struct page *page = pvec.pages[i];
 366                         struct buffer_head *bh, *head;
 367
 368                         /*
 369                          * If the current offset is not beyond the end of given
 370                          * range, it will be a hole.
 371                          */
 372                         if (lastoff < endoff && whence == SEEK_HOLE &&
 373                             page->index > end) {
 374                                 found = 1;
 375                                 *offset = lastoff;
 376                                 goto out;
 377                         }
 378
 379                         lock_page(page);
 380
 381                         if (unlikely(page->mapping != inode->i_mapping)) {
 382                                 unlock_page(page);
 383                                 continue;
 384                         }
 385
 386                         if (!page_has_buffers(page)) {
 387                                 unlock_page(page);
 388                                 continue;
 389                         }
 390
 391                         if (page_has_buffers(page)) {
 392                                 lastoff = page_offset(page);
 393                                 bh = head = page_buffers(page);
 394                                 do {
 395                                         if (buffer_uptodate(bh) ||
 396                                             buffer_unwritten(bh)) {
 397                                                 if (whence == SEEK_DATA)
 398                                                         found = 1;
 399                                         } else {
 400                                                 if (whence == SEEK_HOLE)
 401                                                         found = 1;
 402                                         }
 403                                         if (found) {
 404                                                 *offset = max_t(loff_t,
 405                                                         startoff, lastoff);
 406                                                 unlock_page(page);
 407                                                 goto out;
 408                                         }
 409                                         lastoff += bh->b_size;
 410                                         bh = bh->b_this_page;
 411                                 } while (bh != head);
 412                         }
 413
 414                         lastoff = page_offset(page) + PAGE_SIZE;
 415                         unlock_page(page);
 416                 }
 417
 418                 /*
 419                  * The no. of pages is less than our desired, that would be a
 420                  * hole in there.
 421                  */
 422                 if (nr_pages < num && whence == SEEK_HOLE) {
 423                         found = 1;
 424                         *offset = lastoff;
 425                         break;
 426                 }
 427
 428                 index = pvec.pages[i - 1]->index + 1;
 429                 pagevec_release(&pvec);
 430         } while (index <= end);
 431
 432 out:
 433         pagevec_release(&pvec);
 434         return found;
 435 }
 436
 437 /*
 438  * ext4_seek_data() retrieves the offset for SEEK_DATA.
 439  */
 440 static loff_t ext4_seek_data(struct file *file, loff_t offset, loff_t maxsize)
 441 {
 442         struct inode *inode = file->f_mapping->host;
 443         struct ext4_map_blocks map;
 444         struct extent_status es;
 445         ext4_lblk_t start, last, end;
 446         loff_t dataoff, isize;
 447         int blkbits;
 448         int ret = 0;
 449
 450         mutex_lock(&inode->i_mutex);
 451
 452         isize = i_size_read(inode);
 453         if (offset >= isize) {
 454                 mutex_unlock(&inode->i_mutex);
 455                 return -ENXIO;
 456         }
 457
 458         blkbits = inode->i_sb->s_blocksize_bits;
 459         start = offset >> blkbits;
 460         last = start;
 461         end = isize >> blkbits;
 462         dataoff = offset;
 463
 464         do {
 465                 map.m_lblk = last;
 466                 map.m_len = end - last + 1;
 467                 ret = ext4_map_blocks(NULL, inode, &map, 0);
 468                 if (ret > 0 && !(map.m_flags & EXT4_MAP_UNWRITTEN)) {
 469                         if (last != start)
 470                                 dataoff = (loff_t)last << blkbits;
 471                         break;
 472                 }
 473
 474                 /*
 475                  * If there is a delay extent at this offset,
 476                  * it will be as a data.
 477                  */
 478                 ext4_es_find_delayed_extent_range(inode, last, last, &es);
 479                 if (es.es_len != 0 && in_range(last, es.es_lblk, es.es_len)) {
 480                         if (last != start)
 481                                 dataoff = (loff_t)last << blkbits;
 482                         break;
 483                 }
 484
 485                 /*
 486                  * If there is a unwritten extent at this offset,
 487                  * it will be as a data or a hole according to page
 488                  * cache that has data or not.
 489                  */
 490                 if (map.m_flags & EXT4_MAP_UNWRITTEN) {
 491                         int unwritten;
 492                         unwritten = ext4_find_unwritten_pgoff(inode, SEEK_DATA,
 493                                                               &map, &dataoff);
 494                         if (unwritten)
 495                                 break;
 496                 }
 497
 498                 last++;
 499                 dataoff = (loff_t)last << blkbits;
 500         } while (last <= end);
 501
 502         mutex_unlock(&inode->i_mutex);
 503
 504         if (dataoff > isize)
 505                 return -ENXIO;
 506
 507         return vfs_setpos(file, dataoff, maxsize);
 508 }
 509
 510 /*
 511  * ext4_seek_hole() retrieves the offset for SEEK_HOLE.
 512  */
 513 static loff_t ext4_seek_hole(struct file *file, loff_t offset, loff_t maxsize)
 514 {
 515         struct inode *inode = file->f_mapping->host;
 516         struct ext4_map_blocks map;
 517         struct extent_status es;
 518         ext4_lblk_t start, last, end;
 519         loff_t holeoff, isize;
 520         int blkbits;
 521         int ret = 0;
 522
 523         mutex_lock(&inode->i_mutex);
 524
 525         isize = i_size_read(inode);
 526         if (offset >= isize) {
 527                 mutex_unlock(&inode->i_mutex);
 528                 return -ENXIO;
 529         }
 530
 531         blkbits = inode->i_sb->s_blocksize_bits;
 532         start = offset >> blkbits;
 533         last = start;
 534         end = isize >> blkbits;
 535         holeoff = offset;
 536
 537         do {
 538                 map.m_lblk = last;
 539                 map.m_len = end - last + 1;
 540                 ret = ext4_map_blocks(NULL, inode, &map, 0);
 541                 if (ret > 0 && !(map.m_flags & EXT4_MAP_UNWRITTEN)) {
 542                         last += ret;
 543                         holeoff = (loff_t)last << blkbits;
 544                         continue;
 545                 }
 546
 547                 /*
 548                  * If there is a delay extent at this offset,
 549                  * we will skip this extent.
 550                  */
 551                 ext4_es_find_delayed_extent_range(inode, last, last, &es);
 552                 if (es.es_len != 0 && in_range(last, es.es_lblk, es.es_len)) {
 553                         last = es.es_lblk + es.es_len;
 554                         holeoff = (loff_t)last << blkbits;
 555                         continue;
 556                 }
 557
 558                 /*
 559                  * If there is a unwritten extent at this offset,
 560                  * it will be as a data or a hole according to page
 561                  * cache that has data or not.
 562                  */
 563                 if (map.m_flags & EXT4_MAP_UNWRITTEN) {
 564                         int unwritten;
 565                         unwritten = ext4_find_unwritten_pgoff(inode, SEEK_HOLE,
 566                                                               &map, &holeoff);
 567                         if (!unwritten) {
 568                                 last += ret;
 569                                 holeoff = (loff_t)last << blkbits;
 570                                 continue;
 571                         }
 572                 }
 573
 574                 /* find a hole */
 575                 break;
 576         } while (last <= end);
 577
 578         mutex_unlock(&inode->i_mutex);
 579
 580         if (holeoff > isize)
 581                 holeoff = isize;
 582
 583         return vfs_setpos(file, holeoff, maxsize);
 584 }
 585
 586 /*
 587  * ext4_llseek() handles both block-mapped and extent-mapped maxbytes values
 588  * by calling generic_file_llseek_size() with the appropriate maxbytes
 589  * value for each.
 590  */
 591 loff_t ext4_llseek(struct file *file, loff_t offset, int whence)
 592 {
 593         struct inode *inode = file->f_mapping->host;
 594         loff_t maxbytes;
 595
 596         if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)))
 597                 maxbytes = EXT4_SB(inode->i_sb)->s_bitmap_maxbytes;
 598         else
 599                 maxbytes = inode->i_sb->s_maxbytes;
 600
 601         switch (whence) {
 602         case SEEK_SET:
 603         case SEEK_CUR:
 604         case SEEK_END:
 605                 return generic_file_llseek_size(file, offset, whence,
 606                                                 maxbytes, i_size_read(inode));
 607         case SEEK_DATA:
 608                 return ext4_seek_data(file, offset, maxbytes);
 609         case SEEK_HOLE:
 610                 return ext4_seek_hole(file, offset, maxbytes);
 611         }
 612
 613         return -EINVAL;
 614 }
 615
 616 const struct file_operations ext4_file_operations = {
 617         .llseek         = ext4_llseek,
 618         .read_iter      = generic_file_read_iter,
 619         .write_iter     = ext4_file_write_iter,
 620         .unlocked_ioctl = ext4_ioctl,
 621 #ifdef CONFIG_COMPAT
 622         .compat_ioctl   = ext4_compat_ioctl,
 623 #endif
 624         .mmap           = ext4_file_mmap,
 625         .open           = ext4_file_open,
 626         .release        = ext4_release_file,
 627         .fsync          = ext4_sync_file,
 628         .splice_read    = generic_file_splice_read,
 629         .splice_write   = iter_file_splice_write,
 630         .fallocate      = ext4_fallocate,
 631 };
 632
 633 #ifdef CONFIG_FS_DAX
 634 const struct file_operations ext4_dax_file_operations = {
 635         .llseek         = ext4_llseek,
 636         .read_iter      = generic_file_read_iter,
 637         .write_iter     = ext4_file_write_iter,
 638         .unlocked_ioctl = ext4_ioctl,
 639 #ifdef CONFIG_COMPAT
 640         .compat_ioctl   = ext4_compat_ioctl,
 641 #endif
 642         .mmap           = ext4_file_mmap,
 643         .open           = ext4_file_open,
 644         .release        = ext4_release_file,
 645         .fsync          = ext4_sync_file,
 646         /* Splice not yet supported with DAX */
 647         .fallocate      = ext4_fallocate,
 648 };
 649 #endif
 650
 651 const struct inode_operations ext4_file_inode_operations = {
 652         .setattr        = ext4_setattr,
 653         .getattr        = ext4_getattr,
 654         .setxattr       = generic_setxattr,
 655         .getxattr       = generic_getxattr,
 656         .listxattr      = ext4_listxattr,
 657         .removexattr    = generic_removexattr,
 658         .get_acl        = ext4_get_acl,
 659         .set_acl        = ext4_set_acl,
 660         .fiemap         = ext4_fiemap,
 661 };
 662