enum ofperr
bundle_check(const struct ofpact_bundle *bundle, int max_ports,
const struct flow *flow)
{
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
size_t i;
if (bundle->dst.field) {
enum ofperr error = mf_check_dst(&bundle->dst, flow);
if (error) {
return error;
}
}
for (i = 0; i < bundle->n_slaves; i++) {
uint16_t ofp_port = bundle->slaves[i];
enum ofperr error;
error = ofputil_check_output_port(ofp_port, max_ports);
if (error) {
VLOG_WARN_RL(&rl, "invalid slave %"PRIu16, ofp_port);
return error;
}
/* Controller slaves are unsupported due to the lack of a max_len
* argument. This may or may not change in the future. There doesn't
* seem to be a real-world use-case for supporting it. */
if (ofp_port == OFPP_CONTROLLER) {
VLOG_WARN_RL(&rl, "unsupported controller slave");
return OFPERR_OFPBAC_BAD_OUT_PORT;
}
}
return 0;
}
/* Checks that 'nab' specifies a bundle action which is supported by this
* bundle module. Uses the 'max_ports' parameter to validate each port using
* ofputil_check_output_port(). Returns 0 if 'nab' is supported, otherwise an
* OpenFlow error code (as returned by ofp_mkerr()). */
int
bundle_check(const struct nx_action_bundle *nab, int max_ports,
const struct flow *flow)
{
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
uint16_t n_slaves, fields, algorithm, subtype;
uint32_t slave_type;
size_t slaves_size, i;
int error;
subtype = ntohs(nab->subtype);
n_slaves = ntohs(nab->n_slaves);
fields = ntohs(nab->fields);
algorithm = ntohs(nab->algorithm);
slave_type = ntohl(nab->slave_type);
slaves_size = ntohs(nab->len) - sizeof *nab;
error = ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_ARGUMENT);
if (!flow_hash_fields_valid(fields)) {
VLOG_WARN_RL(&rl, "unsupported fields %"PRIu16, fields);
} else if (n_slaves > BUNDLE_MAX_SLAVES) {
VLOG_WARN_RL(&rl, "too may slaves");
} else if (algorithm != NX_BD_ALG_HRW
&& algorithm != NX_BD_ALG_ACTIVE_BACKUP) {
VLOG_WARN_RL(&rl, "unsupported algorithm %"PRIu16, algorithm);
} else if (slave_type != NXM_OF_IN_PORT) {
VLOG_WARN_RL(&rl, "unsupported slave type %"PRIu16, slave_type);
} else {
error = 0;
}
for (i = 0; i < sizeof(nab->zero); i++) {
if (nab->zero[i]) {
VLOG_WARN_RL(&rl, "reserved field is nonzero");
error = ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_ARGUMENT);
}
}
if (subtype == NXAST_BUNDLE && (nab->ofs_nbits || nab->dst)) {
VLOG_WARN_RL(&rl, "bundle action has nonzero reserved fields");
error = ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_ARGUMENT);
}
if (subtype == NXAST_BUNDLE_LOAD) {
int ofs = nxm_decode_ofs(nab->ofs_nbits);
int n_bits = nxm_decode_n_bits(nab->ofs_nbits);
if (n_bits < 16) {
VLOG_WARN_RL(&rl, "bundle_load action requires at least 16 bit "
"destination.");
error = ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_ARGUMENT);
} else {
error = nxm_dst_check(nab->dst, ofs, n_bits, flow) || error;
}
}
if (slaves_size < n_slaves * sizeof(ovs_be16)) {
VLOG_WARN_RL(&rl, "Nicira action %"PRIu16" only has %zu bytes "
"allocated for slaves. %zu bytes are required for "
"%"PRIu16" slaves.", subtype, slaves_size,
n_slaves * sizeof(ovs_be16), n_slaves);
error = ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_LEN);
}
for (i = 0; i < n_slaves; i++) {
uint16_t ofp_port = bundle_get_slave(nab, i);
int ofputil_error = ofputil_check_output_port(ofp_port, max_ports);
if (ofputil_error) {
VLOG_WARN_RL(&rl, "invalid slave %"PRIu16, ofp_port);
error = ofputil_error;
}
/* Controller slaves are unsupported due to the lack of a max_len
* argument. This may or may not change in the future. There doesn't
* seem to be a real-world use-case for supporting it. */
if (ofp_port == OFPP_CONTROLLER) {
VLOG_WARN_RL(&rl, "unsupported controller slave");
error = ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_BAD_OUT_PORT);
}
}
return error;
}