Function lomac_vnode_associate_extattr

freebsd/security/mac_lomac/mac_lomac.c:2273–2319

}

static int
lomac_vnode_associate_extattr(struct mount *mp, struct label *mplabel,
    struct vnode *vp, struct label *vplabel)
{
	struct mac_lomac ml_temp, *source, *dest;
	int buflen, error;

	source = SLOT(mplabel);
	dest = SLOT(vplabel);

	buflen = sizeof(ml_temp);
	bzero(&ml_temp, buflen);

	error = vn_extattr_get(vp, IO_NODELOCKED, MAC_LOMAC_EXTATTR_NAMESPACE,
	    MAC_LOMAC_EXTATTR_NAME, &buflen, (char *)&ml_temp, curthread);
	if (error == ENOATTR || error == EOPNOTSUPP) {
		/* Fall back to the mntlabel. */
		lomac_copy_single(source, dest);
		return (0);
	} else if (error)
		return (error);

	if (buflen != sizeof(ml_temp)) {
		if (buflen != sizeof(ml_temp) - sizeof(ml_temp.ml_auxsingle)) {
			printf("lomac_vnode_associate_extattr: bad size %d\n",
			    buflen);
			return (EPERM);
		}
		bzero(&ml_temp.ml_auxsingle, sizeof(ml_temp.ml_auxsingle));
		buflen = sizeof(ml_temp);
		(void)vn_extattr_set(vp, IO_NODELOCKED,
		    MAC_LOMAC_EXTATTR_NAMESPACE, MAC_LOMAC_EXTATTR_NAME,
		    buflen, (char *)&ml_temp, curthread);
	}
	if (lomac_valid(&ml_temp) != 0) {
		printf("lomac_vnode_associate_extattr: invalid\n");
		return (EPERM);
	}
	if ((ml_temp.ml_flags & MAC_LOMAC_FLAGS_BOTH) !=
	    MAC_LOMAC_FLAG_SINGLE) {
		printf("lomac_vnode_associate_extattr: not single\n");
		return (EPERM);
	}

	lomac_copy_single(&ml_temp, dest);
	return (0);
}

static void
lomac_vnode_associate_singlelabel(struct mount *mp, struct label *mplabel,