reactos/drivers/filesystems/ext2/src/ext4/ext4_bh.c

   1 #include <ext2fs.h>
   2 #include <linux/module.h>
   3 #include <linux/errno.h>
   4
   5 /*
   6  * extents_bread: This function is a wrapper of CcPinRead routine.
   7  *
   8  * @sb:    the device we need to undergo buffered IO on.
   9  * @block: the block we want to read from.
  10  *
  11  * If the call to this routine succeeds, the pages underlying the buffer header
  12  * will be locked into memory, so that the buffer header returned for use is safe.
  13  */
  14 struct buffer_head *
  15 extents_bread(struct super_block *sb, sector_t block)
  16 {
  17     return sb_getblk(sb, block);
  18 }
  19
  20 /*
  21  * extents_bwrite: This function is a wrapper of CcPreparePinWrite routine.
  22  *
  23  * @sb:    the device we need to undergo buffered IO on.
  24  * @block: the block we want to write to.
  25  */
  26 struct buffer_head *
  27 extents_bwrite(struct super_block *sb, sector_t block)
  28 {
  29     return sb_getblk_zero(sb, block);
  30
  31 }
  32
  33 /*
  34  * extents_mark_buffer_dirty: Mark the buffer dirtied and so
  35  *                            that changes will be written back.
  36  *
  37  * @bh: The corresponding buffer header that is modified.
  38  */
  39 void extents_mark_buffer_dirty(struct buffer_head *bh)
  40 {
  41     set_buffer_dirty(bh);
  42 }
  43
  44 /*
  45  * extents_brelse: Release the corresponding buffer header.
  46  *
  47  * @bh: The corresponding buffer header that is going to be freed.
  48  *
  49  * The pages underlying the buffer header will be unlocked.
  50  */
  51 void extents_brelse(struct buffer_head *bh)
  52 {
  53     brelse(bh);
  54 }