proc/self: use generic_readlink

/*

 * /proc/self:

 */

static int proc_self_readlink(struct dentry *dentry, char __user *buffer,

			      int buflen)

{

	struct pid_namespace *ns = dentry->d_sb->s_fs_info;

	pid_t tgid = task_tgid_nr_ns(current, ns);

	char tmp[PROC_NUMBUF];

	if (!tgid)

		return -ENOENT;

	sprintf(tmp, "%d", tgid);

	return readlink_copy(buffer, buflen, tmp);

}

static const char *proc_self_get_link(struct dentry *dentry,

				      struct inode *inode,

				      struct delayed_call *done)

}

static const struct inode_operations proc_self_inode_operations = {

	.readlink	= proc_self_readlink,

	.readlink	= generic_readlink,

	.get_link	= proc_self_get_link,

};

/*

 * /proc/thread_self:

 */

static int proc_thread_self_readlink(struct dentry *dentry, char __user *buffer,

			      int buflen)

{

	struct pid_namespace *ns = dentry->d_sb->s_fs_info;

	pid_t tgid = task_tgid_nr_ns(current, ns);

	pid_t pid = task_pid_nr_ns(current, ns);

	char tmp[PROC_NUMBUF + 6 + PROC_NUMBUF];

	if (!pid)

		return -ENOENT;

	sprintf(tmp, "%d/task/%d", tgid, pid);

	return readlink_copy(buffer, buflen, tmp);

}

static const char *proc_thread_self_get_link(struct dentry *dentry,

					     struct inode *inode,

					     struct delayed_call *done)

}

static const struct inode_operations proc_thread_self_inode_operations = {

	.readlink	= proc_thread_self_readlink,

	.readlink	= generic_readlink,

	.get_link	= proc_thread_self_get_link,

};