LXR linux/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 */
  34static 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
  54const 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
  72const 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
  85