Exemplo n.º 1
0
static int do_open_dir(struct file *file, int flags)
{
	int err;
	aufs_bindex_t bindex, btail;
	struct dentry *dentry, *h_dentry;
	struct file *h_file;

	FiMustWriteLock(file);

	dentry = file->f_dentry;
	err = au_alive_dir(dentry);
	if (unlikely(err))
		goto out;

	file->f_version = dentry->d_inode->i_version;
	bindex = au_dbstart(dentry);
	au_set_fbstart(file, bindex);
	btail = au_dbtaildir(dentry);
	au_set_fbend_dir(file, btail);
	for (; !err && bindex <= btail; bindex++) {
		h_dentry = au_h_dptr(dentry, bindex);
		if (!h_dentry)
			continue;

		h_file = au_h_open(dentry, bindex, flags, file);
		if (IS_ERR(h_file)) {
			err = PTR_ERR(h_file);
			break;
		}
		au_set_h_fptr(file, bindex, h_file);
	}
	au_update_figen(file);
	/* todo: necessary? */
	/* file->f_ra = h_file->f_ra; */
	if (!err)
		return 0; /* success */

	/* close all */
	for (bindex = au_fbstart(file); bindex <= btail; bindex++)
		au_set_h_fptr(file, bindex, NULL);
	au_set_fbstart(file, -1);
	au_set_fbend_dir(file, -1);

out:
	return err;
}
Exemplo n.º 2
0
static int reopen_dir(struct file *file)
{
	int err;
	unsigned int flags;
	aufs_bindex_t bindex, btail, bstart;
	struct dentry *dentry, *h_dentry;
	struct file *h_file;

	/* open all lower dirs */
	dentry = file->f_dentry;
	bstart = au_dbstart(dentry);
	for (bindex = au_fbstart(file); bindex < bstart; bindex++)
		au_set_h_fptr(file, bindex, NULL);
	au_set_fbstart(file, bstart);

	btail = au_dbtaildir(dentry);
	for (bindex = au_fbend_dir(file); btail < bindex; bindex--)
		au_set_h_fptr(file, bindex, NULL);
	au_set_fbend_dir(file, btail);

	flags = vfsub_file_flags(file);
	for (bindex = bstart; bindex <= btail; bindex++) {
		h_dentry = au_h_dptr(dentry, bindex);
		if (!h_dentry)
			continue;
		h_file = au_hf_dir(file, bindex);
		if (h_file)
			continue;

		h_file = au_h_open(dentry, bindex, flags, file);
		err = PTR_ERR(h_file);
		if (IS_ERR(h_file))
			goto out; /* close all? */
		au_set_h_fptr(file, bindex, h_file);
	}
	au_update_figen(file);
	/* todo: necessary? */
	/* file->f_ra = h_file->f_ra; */
	err = 0;

out:
	return err;
}