static int selinux_inode_setattr(struct dentry *dentry, struct iattr *iattr)
{
	const struct cred *cred = current_cred();
	unsigned int ia_valid = iattr->ia_valid;
	__u32 av = FILE__WRITE;

	/* ATTR_FORCE is just used for ATTR_KILL_S[UG]ID. */
	if (ia_valid & ATTR_FORCE) {
		ia_valid &= ~(ATTR_KILL_SUID | ATTR_KILL_SGID | ATTR_MODE |
			      ATTR_FORCE);
		if (!ia_valid)
			return 0;
	}

	if (ia_valid & (ATTR_MODE | ATTR_UID | ATTR_GID |
			ATTR_ATIME_SET | ATTR_MTIME_SET | ATTR_TIMES_SET))
		return dentry_has_perm(cred, dentry, FILE__SETATTR);

	if (selinux_policycap_openperm && (ia_valid & ATTR_SIZE)
			&& !(ia_valid & ATTR_FILE))
		av |= FILE__OPEN;

	return dentry_has_perm(cred, dentry, av);
}
Unknown