file.c

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/*
 *  linux/fs/ext3/file.c
 *
 * Copyright (C) 1992, 1993, 1994, 1995
 * Remy Card ([email protected])
 * Laboratoire MASI - Institut Blaise Pascal
 * Universite Pierre et Marie Curie (Paris VI)
 *
 *  from
 *
 *  linux/fs/minix/file.c
 *
 *  Copyright (C) 1991, 1992  Linus Torvalds
 *
 *  ext3 fs regular file handling primitives
 *
 *  64-bit file support on 64-bit platforms by Jakub Jelinek
 *  ([email protected])
 */

#include <linux/quotaops.h>
#include "ext3.h"
#include "xattr.h"
#include "acl.h"

/*
 * Called when an inode is released. Note that this is different
 * from ext3_file_open: open gets called at every open, but release
 * gets called only when /all/ the files are closed.
 */
static int ext3_release_file (struct inode * inode, struct file * filp)
{
    if (ext3_test_inode_state(inode, EXT3_STATE_FLUSH_ON_CLOSE)) {
        filemap_flush(inode->i_mapping);
        ext3_clear_inode_state(inode, EXT3_STATE_FLUSH_ON_CLOSE);
    }
    /* if we are the last writer on the inode, drop the block reservation */
    if ((filp->f_mode & FMODE_WRITE) &&
            (atomic_read(&inode->i_writecount) == 1))
    {
        mutex_lock(&EXT3_I(inode)->truncate_mutex);
        ext3_discard_reservation(inode);
        mutex_unlock(&EXT3_I(inode)->truncate_mutex);
    }
    if (is_dx(inode) && filp->private_data)
        ext3_htree_free_dir_info(filp->private_data);

    return 0;
}

const struct file_operations ext3_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 = ext3_ioctl,
#ifdef CONFIG_COMPAT
    .compat_ioctl   = ext3_compat_ioctl,
#endif
    .mmap       = generic_file_mmap,
    .open       = dquot_file_open,
    .release    = ext3_release_file,
    .fsync      = ext3_sync_file,
    .splice_read    = generic_file_splice_read,
    .splice_write   = generic_file_splice_write,
};

const struct inode_operations ext3_file_inode_operations = {
    .setattr    = ext3_setattr,
#ifdef CONFIG_EXT3_FS_XATTR
    .setxattr   = generic_setxattr,
    .getxattr   = generic_getxattr,
    .listxattr  = ext3_listxattr,
    .removexattr    = generic_removexattr,
#endif
    .get_acl    = ext3_get_acl,
    .fiemap     = ext3_fiemap,
};