fs/ext3/file.c

   1 /*
   2  *  linux/fs/ext3/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  *  ext3 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/jbd.h>
  24 #include <linux/ext3_fs.h>
  25 #include <linux/ext3_jbd.h>
  26 #include "xattr.h"
  27 #include "acl.h"
  28
  29 /*
  30  * Called when an inode is released. Note that this is different
  31  * from ext3_file_open: open gets called at every open, but release
  32  * gets called only when /all/ the files are closed.
  33  */
  34 static int ext3_release_file (struct inode * inode, struct file * filp)
  35 {
  36         if (EXT3_I(inode)->i_state & EXT3_STATE_FLUSH_ON_CLOSE) {
  37                 filemap_flush(inode->i_mapping);
  38                 EXT3_I(inode)->i_state &= ~EXT3_STATE_FLUSH_ON_CLOSE;
  39         }
  40         /* if we are the last writer on the inode, drop the block reservation */
  41         if ((filp->f_mode & FMODE_WRITE) &&
  42                         (atomic_read(&inode->i_writecount) == 1))
  43         {
  44                 mutex_lock(&EXT3_I(inode)->truncate_mutex);
  45                 ext3_discard_reservation(inode);
  46                 mutex_unlock(&EXT3_I(inode)->truncate_mutex);
  47         }
  48         if (is_dx(inode) && filp->private_data)
  49                 ext3_htree_free_dir_info(filp->private_data);
  50
  51         return 0;
  52 }
  53
  54 const struct file_operations ext3_file_operations = {
  55         .llseek         = generic_file_llseek,
  56         .read           = do_sync_read,
  57         .write          = do_sync_write,
  58         .aio_read       = generic_file_aio_read,
  59         .aio_write      = generic_file_aio_write,
  60         .unlocked_ioctl = ext3_ioctl,
  61 #ifdef CONFIG_COMPAT
  62         .compat_ioctl   = ext3_compat_ioctl,
  63 #endif
  64         .mmap           = generic_file_mmap,
  65         .open           = generic_file_open,
  66         .release        = ext3_release_file,
  67         .fsync          = ext3_sync_file,
  68         .splice_read    = generic_file_splice_read,
  69         .splice_write   = generic_file_splice_write,
  70 };
  71
  72 const struct inode_operations ext3_file_inode_operations = {
  73         .truncate       = ext3_truncate,
  74         .setattr        = ext3_setattr,
  75 #ifdef CONFIG_EXT3_FS_XATTR
  76         .setxattr       = generic_setxattr,
  77         .getxattr       = generic_getxattr,
  78         .listxattr      = ext3_listxattr,
  79         .removexattr    = generic_removexattr,
  80 #endif
  81         .check_acl      = ext3_check_acl,
  82         .fiemap         = ext3_fiemap,
  83 };
  84