예제 #1
0
static int minix_unlink(struct inode * dir, struct dentry *dentry)
{
	int err = -ENOENT;
	struct inode * inode = dentry->d_inode;
	struct page * page;
	struct minix_dir_entry * de;

	de = minix_find_entry(dentry, &page);
	if (!de)
		goto end_unlink;

	err = minix_delete_entry(de, page);
	if (err)
		goto end_unlink;

	inode->i_ctime = dir->i_ctime;
	dec_count(inode);
end_unlink:
	return err;
}
예제 #2
0
static int minix_rename(struct inode * old_dir, struct dentry *old_dentry,
			   struct inode * new_dir, struct dentry *new_dentry)
{
	struct minix_sb_info * info = minix_sb(old_dir->i_sb);
	struct inode * old_inode = old_dentry->d_inode;
	struct inode * new_inode = new_dentry->d_inode;
	struct page * dir_page = NULL;
	struct minix_dir_entry * dir_de = NULL;
	struct page * old_page;
	struct minix_dir_entry * old_de;
	int err = -ENOENT;

	old_de = minix_find_entry(old_dentry, &old_page);
	if (!old_de)
		goto out;

	if (S_ISDIR(old_inode->i_mode)) {
		err = -EIO;
		dir_de = minix_dotdot(old_inode, &dir_page);
		if (!dir_de)
			goto out_old;
	}

	if (new_inode) {
		struct page * new_page;
		struct minix_dir_entry * new_de;

		err = -ENOTEMPTY;
		if (dir_de && !minix_empty_dir(new_inode))
			goto out_dir;

		err = -ENOENT;
		new_de = minix_find_entry(new_dentry, &new_page);
		if (!new_de)
			goto out_dir;
		inc_count(old_inode);
		minix_set_link(new_de, new_page, old_inode);
		new_inode->i_ctime = CURRENT_TIME_SEC;
		if (dir_de)
			new_inode->i_nlink--;
		dec_count(new_inode);
	} else {
		if (dir_de) {
			err = -EMLINK;
			if (new_dir->i_nlink >= info->s_link_max)
				goto out_dir;
		}
		inc_count(old_inode);
		err = minix_add_link(new_dentry, old_inode);
		if (err) {
			dec_count(old_inode);
			goto out_dir;
		}
		if (dir_de)
			inc_count(new_dir);
	}

	minix_delete_entry(old_de, old_page);
	dec_count(old_inode);

	if (dir_de) {
		minix_set_link(dir_de, dir_page, new_dir);
		dec_count(old_dir);
	}
	return 0;

out_dir:
	if (dir_de) {
		kunmap(dir_page);
		page_cache_release(dir_page);
	}
out_old:
	kunmap(old_page);
	page_cache_release(old_page);
out:
	return err;
}
예제 #3
0
파일: namei.c 프로젝트: mhei/linux
static int minix_rename(struct inode * old_dir, struct dentry *old_dentry,
                        struct inode * new_dir, struct dentry *new_dentry,
                        unsigned int flags)
{
    struct inode * old_inode = d_inode(old_dentry);
    struct inode * new_inode = d_inode(new_dentry);
    struct page * dir_page = NULL;
    struct minix_dir_entry * dir_de = NULL;
    struct page * old_page;
    struct minix_dir_entry * old_de;
    int err = -ENOENT;

    if (flags & ~RENAME_NOREPLACE)
        return -EINVAL;

    old_de = minix_find_entry(old_dentry, &old_page);
    if (!old_de)
        goto out;

    if (S_ISDIR(old_inode->i_mode)) {
        err = -EIO;
        dir_de = minix_dotdot(old_inode, &dir_page);
        if (!dir_de)
            goto out_old;
    }

    if (new_inode) {
        struct page * new_page;
        struct minix_dir_entry * new_de;

        err = -ENOTEMPTY;
        if (dir_de && !minix_empty_dir(new_inode))
            goto out_dir;

        err = -ENOENT;
        new_de = minix_find_entry(new_dentry, &new_page);
        if (!new_de)
            goto out_dir;
        minix_set_link(new_de, new_page, old_inode);
        new_inode->i_ctime = current_time(new_inode);
        if (dir_de)
            drop_nlink(new_inode);
        inode_dec_link_count(new_inode);
    } else {
        err = minix_add_link(new_dentry, old_inode);
        if (err)
            goto out_dir;
        if (dir_de)
            inode_inc_link_count(new_dir);
    }

    minix_delete_entry(old_de, old_page);
    mark_inode_dirty(old_inode);

    if (dir_de) {
        minix_set_link(dir_de, dir_page, new_dir);
        inode_dec_link_count(old_dir);
    }
    return 0;

out_dir:
    if (dir_de) {
        kunmap(dir_page);
        put_page(dir_page);
    }
out_old:
    kunmap(old_page);
    put_page(old_page);
out:
    return err;
}