root/fs/ext2/file.c

DEFINITIONS

1. ext2_release_file

/*
 *  linux/fs/ext2/file.c
 *
 * Copyright (C) 1992, 1993, 1994, 1995
 * Remy Card (card@masi.ibp.fr)
 * Laboratoire MASI - Institut Blaise Pascal
 * Universite Pierre et Marie Curie (Paris VI)
 *
 *  from
 *
 *  linux/fs/minix/file.c
 *
 *  Copyright (C) 1991, 1992  Linus Torvalds
 *
 *  ext2 fs regular file handling primitives
 *
 *  64-bit file support on 64-bit platforms by Jakub Jelinek
 *      (jj@sunsite.ms.mff.cuni.cz)
 */

#include <linux/time.h>
#include "ext2.h"
#include "xattr.h"
#include "acl.h"

/*
 * Called when filp is released. This happens when all file descriptors
 * for a single struct file are closed. Note that different open() calls
 * for the same file yield different struct file structures.
 */
static int ext2_release_file (struct inode * inode, struct file * filp)
{
        if (filp->f_mode & FMODE_WRITE) {
                mutex_lock(&EXT2_I(inode)->truncate_mutex);
                ext2_discard_reservation(inode);
                mutex_unlock(&EXT2_I(inode)->truncate_mutex);
        }
        return 0;
}

/*
 * We have mostly NULL's here: the current defaults are ok for
 * the ext2 filesystem.
 */
const struct file_operations ext2_file_operations = {
        .llseek         = generic_file_llseek,
        .read           = do_sync_read,
        .write          = do_sync_write,
        .aio_read       = generic_file_aio_read,
        .aio_write      = generic_file_aio_write,
        .unlocked_ioctl = ext2_ioctl,
#ifdef CONFIG_COMPAT
        .compat_ioctl   = ext2_compat_ioctl,
#endif
        .mmap           = generic_file_mmap,
        .open           = generic_file_open,
        .release        = ext2_release_file,
        .fsync          = ext2_sync_file,
        .splice_read    = generic_file_splice_read,
        .splice_write   = generic_file_splice_write,
};

#ifdef CONFIG_EXT2_FS_XIP
const struct file_operations ext2_xip_file_operations = {
        .llseek         = generic_file_llseek,
        .read           = xip_file_read,
        .write          = xip_file_write,
        .unlocked_ioctl = ext2_ioctl,
#ifdef CONFIG_COMPAT
        .compat_ioctl   = ext2_compat_ioctl,
#endif
        .mmap           = xip_file_mmap,
        .open           = generic_file_open,
        .release        = ext2_release_file,
        .fsync          = ext2_sync_file,
};
#endif

const struct inode_operations ext2_file_inode_operations = {
        .truncate       = ext2_truncate,
#ifdef CONFIG_EXT2_FS_XATTR
        .setxattr       = generic_setxattr,
        .getxattr       = generic_getxattr,
        .listxattr      = ext2_listxattr,
        .removexattr    = generic_removexattr,
#endif
        .setattr        = ext2_setattr,
        .permission     = ext2_permission,
        .fiemap         = ext2_fiemap,
};