C++ (Cpp) parse_fuse_optの例

コード例 #1

ファイル: inode.c プロジェクト: JBTech/ralink_rt5350

static int fuse_fill_super(struct super_block *sb, void *data, int silent)
{
	struct fuse_conn *fc;
	struct inode *root;
	struct fuse_mount_data d;
	struct file *file;
	int err;

	if (!parse_fuse_opt((char *) data, &d))
		return -EINVAL;

	sb->s_blocksize = PAGE_CACHE_SIZE;
	sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
	sb->s_magic = FUSE_SUPER_MAGIC;
	sb->s_op = &fuse_super_operations;
	sb->s_maxbytes = MAX_LFS_FILESIZE;
#ifndef FUSE_MAINLINE
#ifdef KERNEL_2_6
	sb->s_export_op = &fuse_export_operations;
#endif
#endif

	file = fget(d.fd);
	if (!file)
		return -EINVAL;

	fc = get_conn(file, sb);
	fput(file);
	if (IS_ERR(fc))
		return PTR_ERR(fc);

	fc->flags = d.flags;
	fc->user_id = d.user_id;
	fc->group_id = d.group_id;
	fc->max_read = d.max_read;
#ifdef KERNEL_2_6
	if (fc->max_read / PAGE_CACHE_SIZE < fc->bdi.ra_pages)
		fc->bdi.ra_pages = fc->max_read / PAGE_CACHE_SIZE;
#endif

	err = -ENOMEM;
	root = get_root_inode(sb, d.rootmode);
	if (root == NULL)
		goto err;

	sb->s_root = d_alloc_root(root);
	if (!sb->s_root) {
		iput(root);
		goto err;
	}
	fuse_send_init(fc);
	return 0;

 err:
	spin_lock(&fuse_lock);
	fuse_release_conn(fc);
	spin_unlock(&fuse_lock);
	return err;
}

コード例 #2

ファイル: inode.c プロジェクト: masbog/iphonelinux-kernel

static int fuse_fill_super(struct super_block *sb, void *data, int silent)
{
	struct fuse_conn *fc;
	struct inode *root;
	struct fuse_mount_data d;
	struct file *file;
	struct dentry *root_dentry;
	struct fuse_req *init_req;
	int err;
	int is_bdev = sb->s_bdev != NULL;

	if (sb->s_flags & MS_MANDLOCK)
		return -EINVAL;

	if (!parse_fuse_opt((char *) data, &d, is_bdev))
		return -EINVAL;

	if (is_bdev) {
#ifdef CONFIG_BLOCK
		if (!sb_set_blocksize(sb, d.blksize))
			return -EINVAL;
#endif
	} else {
		sb->s_blocksize = PAGE_CACHE_SIZE;
		sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
	}
	sb->s_magic = FUSE_SUPER_MAGIC;
	sb->s_op = &fuse_super_operations;
	sb->s_maxbytes = MAX_LFS_FILESIZE;
	sb->s_export_op = &fuse_export_operations;

	file = fget(d.fd);
	if (!file)
		return -EINVAL;

	if (file->f_op != &fuse_dev_operations)
		return -EINVAL;

	fc = new_conn(sb);
	if (!fc)
		return -ENOMEM;

	fc->flags = d.flags;
	fc->user_id = d.user_id;
	fc->group_id = d.group_id;
	fc->max_read = max_t(unsigned, 4096, d.max_read);

	/* Used by get_root_inode() */
	sb->s_fs_info = fc;

	err = -ENOMEM;
	root = get_root_inode(sb, d.rootmode);
	if (!root)
		goto err;

	root_dentry = d_alloc_root(root);
	if (!root_dentry) {
		iput(root);
		goto err;
	}

	init_req = fuse_request_alloc();
	if (!init_req)
		goto err_put_root;

	if (is_bdev) {
		fc->destroy_req = fuse_request_alloc();
		if (!fc->destroy_req)
			goto err_free_init_req;
	}

	mutex_lock(&fuse_mutex);
	err = -EINVAL;
	if (file->private_data)
		goto err_unlock;

	err = fuse_ctl_add_conn(fc);
	if (err)
		goto err_unlock;

	list_add_tail(&fc->entry, &fuse_conn_list);
	sb->s_root = root_dentry;
	fc->connected = 1;
	file->private_data = fuse_conn_get(fc);
	mutex_unlock(&fuse_mutex);
	/*
	 * atomic_dec_and_test() in fput() provides the necessary
	 * memory barrier for file->private_data to be visible on all
	 * CPUs after this
	 */
	fput(file);

	fuse_send_init(fc, init_req);

	return 0;

 err_unlock:
	mutex_unlock(&fuse_mutex);
 err_free_init_req:
	fuse_request_free(init_req);
 err_put_root:
	dput(root_dentry);
 err:
	fput(file);
	fuse_conn_put(fc);
	return err;
}