/* Hash table of 'nxm_fields'. */
static struct hmap all_nxm_fields = HMAP_INITIALIZER(&all_nxm_fields);
+/* Possible masks for NXM_OF_ETH_DST_W. */
+static const uint8_t eth_all_0s[ETH_ADDR_LEN]
+ = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
+static const uint8_t eth_all_1s[ETH_ADDR_LEN]
+ = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
+static const uint8_t eth_mcast_1[ETH_ADDR_LEN]
+ = {0x01, 0x00, 0x00, 0x00, 0x00, 0x00};
+static const uint8_t eth_mcast_0[ETH_ADDR_LEN]
+ = {0xfe, 0xff, 0xff, 0xff, 0xff, 0xff};
+
static void
nxm_init(void)
{
unsigned int length = NXM_LENGTH(header);
return NXM_HASMASK(header) ? length / 2 : length;
}
+
+/* Returns the width of the data for a field with the given 'header', in
+ * bits. */
+static int
+nxm_field_bits(uint32_t header)
+{
+ return nxm_field_bytes(header) * 8;
+}
\f
/* nx_pull_match() and helpers. */
}
}
+static int
+parse_nx_reg(const struct nxm_field *f,
+ struct flow *flow, struct flow_wildcards *wc,
+ const void *value, const void *maskp)
+{
+ int idx = NXM_NX_REG_IDX(f->header);
+ if (wc->reg_masks[idx]) {
+ return NXM_DUP_TYPE;
+ } else {
+ flow_wildcards_set_reg_mask(wc, idx,
+ (NXM_HASMASK(f->header)
+ ? ntohl(get_unaligned_u32(maskp))
+ : UINT32_MAX));
+ flow->regs[idx] = ntohl(get_unaligned_u32(value));
+ flow->regs[idx] &= wc->reg_masks[idx];
+ return 0;
+ }
+}
+
static int
parse_nxm_entry(struct cls_rule *rule, const struct nxm_field *f,
const void *value, const void *mask)
/* Ethernet header. */
case NFI_NXM_OF_ETH_DST:
- memcpy(flow->dl_dst, value, ETH_ADDR_LEN);
- return 0;
+ if ((wc->wildcards & (OFPFW_DL_DST | FWW_ETH_MCAST))
+ != (OFPFW_DL_DST | FWW_ETH_MCAST)) {
+ return NXM_DUP_TYPE;
+ } else {
+ wc->wildcards &= ~(OFPFW_DL_DST | FWW_ETH_MCAST);
+ memcpy(flow->dl_dst, value, ETH_ADDR_LEN);
+ return 0;
+ }
+ case NFI_NXM_OF_ETH_DST_W:
+ if ((wc->wildcards & (OFPFW_DL_DST | FWW_ETH_MCAST))
+ != (OFPFW_DL_DST | FWW_ETH_MCAST)) {
+ return NXM_DUP_TYPE;
+ } else if (eth_addr_equals(mask, eth_mcast_1)) {
+ wc->wildcards &= ~FWW_ETH_MCAST;
+ flow->dl_dst[0] = *(uint8_t *) value & 0x01;
+ } else if (eth_addr_equals(mask, eth_mcast_0)) {
+ wc->wildcards &= ~OFPFW_DL_DST;
+ memcpy(flow->dl_dst, value, ETH_ADDR_LEN);
+ flow->dl_dst[0] &= 0xfe;
+ } else if (eth_addr_equals(mask, eth_all_0s)) {
+ return 0;
+ } else if (eth_addr_equals(mask, eth_all_1s)) {
+ wc->wildcards &= ~(OFPFW_DL_DST | FWW_ETH_MCAST);
+ memcpy(flow->dl_dst, value, ETH_ADDR_LEN);
+ return 0;
+ } else {
+ return NXM_BAD_MASK;
+ }
case NFI_NXM_OF_ETH_SRC:
memcpy(flow->dl_src, value, ETH_ADDR_LEN);
return 0;
flow->tun_id = htonl(ntohll(get_unaligned_u64(value)));
return 0;
+ /* Registers. */
+ case NFI_NXM_NX_REG0:
+ case NFI_NXM_NX_REG0_W:
+#if FLOW_N_REGS >= 2
+ case NFI_NXM_NX_REG1:
+ case NFI_NXM_NX_REG1_W:
+#endif
+#if FLOW_N_REGS >= 3
+ case NFI_NXM_NX_REG2:
+ case NFI_NXM_NX_REG2_W:
+#endif
+#if FLOW_N_REGS >= 4
+ case NFI_NXM_NX_REG3:
+ case NFI_NXM_NX_REG3_W:
+#endif
+#if FLOW_N_REGS > 4
+#error
+#endif
+ return parse_nx_reg(f, flow, wc, value, mask);
+
case N_NXM_FIELDS:
NOT_REACHED();
}
ofpbuf_put(b, &value, sizeof value);
}
-
static void
nxm_put_eth(struct ofpbuf *b, uint32_t header,
const uint8_t value[ETH_ADDR_LEN])
ofpbuf_put(b, value, ETH_ADDR_LEN);
}
+static void
+nxm_put_eth_dst(struct ofpbuf *b,
+ uint32_t wc, const uint8_t value[ETH_ADDR_LEN])
+{
+ switch (wc & (OFPFW_DL_DST | FWW_ETH_MCAST)) {
+ case OFPFW_DL_DST | FWW_ETH_MCAST:
+ break;
+ case OFPFW_DL_DST:
+ nxm_put_header(b, NXM_OF_ETH_DST_W);
+ ofpbuf_put(b, value, ETH_ADDR_LEN);
+ ofpbuf_put(b, eth_mcast_1, ETH_ADDR_LEN);
+ break;
+ case FWW_ETH_MCAST:
+ nxm_put_header(b, NXM_OF_ETH_DST_W);
+ ofpbuf_put(b, value, ETH_ADDR_LEN);
+ ofpbuf_put(b, eth_mcast_0, ETH_ADDR_LEN);
+ break;
+ case 0:
+ nxm_put_eth(b, NXM_OF_ETH_DST, value);
+ break;
+ }
+}
+
int
nx_put_match(struct ofpbuf *b, const struct cls_rule *cr)
{
const size_t start_len = b->size;
ovs_be16 vid, pcp;
int match_len;
+ int i;
/* Metadata. */
if (!(wc & OFPFW_IN_PORT)) {
}
/* Ethernet. */
- if (!(wc & OFPFW_DL_DST)) {
- nxm_put_eth(b, NXM_OF_ETH_DST, flow->dl_dst);
- }
+ nxm_put_eth_dst(b, wc, flow->dl_dst);
if (!(wc & OFPFW_DL_SRC)) {
nxm_put_eth(b, NXM_OF_ETH_SRC, flow->dl_src);
}
nxm_put_64(b, NXM_NX_TUN_ID, htonll(ntohl(flow->tun_id)));
}
+ /* Registers. */
+ for (i = 0; i < FLOW_N_REGS; i++) {
+ nxm_put_32m(b, NXM_NX_REG(i),
+ htonl(flow->regs[i]), htonl(cr->wc.reg_masks[i]));
+ }
+
match_len = b->size - start_len;
ofpbuf_put_zeros(b, ROUND_UP(match_len, 8) - match_len);
return match_len;
parse_hex_bytes(struct ofpbuf *b, const char *s, unsigned int n)
{
while (n--) {
- int low, high;
uint8_t byte;
+ bool ok;
s += strspn(s, " ");
- low = hexit_value(*s);
- high = low < 0 ? low : hexit_value(s[1]);
- if (low < 0 || high < 0) {
+ byte = hexits_value(s, 2, &ok);
+ if (!ok) {
ovs_fatal(0, "%.2s: hex digits expected", s);
}
- byte = 16 * low + high;
ofpbuf_put(b, &byte, 1);
s += 2;
}
ofpbuf_put_zeros(b, ROUND_UP(match_len, 8) - match_len);
return match_len;
}
+\f
+/* nxm_check_reg_move(), nxm_check_reg_load(). */
+
+static bool
+field_ok(const struct nxm_field *f, const struct flow *flow, int size)
+{
+ return (f && !NXM_HASMASK(f->header)
+ && nxm_prereqs_ok(f, flow) && size <= nxm_field_bits(f->header));
+}
+
+int
+nxm_check_reg_move(const struct nx_action_reg_move *action,
+ const struct flow *flow)
+{
+ const struct nxm_field *src;
+ const struct nxm_field *dst;
+
+ if (action->n_bits == htons(0)) {
+ return BAD_ARGUMENT;
+ }
+
+ src = nxm_field_lookup(ntohl(action->src));
+ if (!field_ok(src, flow, ntohs(action->src_ofs) + ntohs(action->n_bits))) {
+ return BAD_ARGUMENT;
+ }
+
+ dst = nxm_field_lookup(ntohl(action->dst));
+ if (!field_ok(dst, flow, ntohs(action->dst_ofs) + ntohs(action->n_bits))) {
+ return BAD_ARGUMENT;
+ }
+
+ if (!NXM_IS_NX_REG(dst->header)
+ && dst->header != NXM_OF_VLAN_TCI
+ && dst->header != NXM_NX_TUN_ID) {
+ return BAD_ARGUMENT;
+ }
+
+ return 0;
+}
+
+int
+nxm_check_reg_load(const struct nx_action_reg_load *action,
+ const struct flow *flow)
+{
+ const struct nxm_field *dst;
+ int ofs, n_bits;
+
+ ofs = ntohs(action->ofs_nbits) >> 6;
+ n_bits = (ntohs(action->ofs_nbits) & 0x3f) + 1;
+ dst = nxm_field_lookup(ntohl(action->dst));
+ if (!field_ok(dst, flow, ofs + n_bits)) {
+ return BAD_ARGUMENT;
+ }
+
+ /* Reject 'action' if a bit numbered 'n_bits' or higher is set to 1 in
+ * action->value. */
+ if (n_bits < 64 && ntohll(action->value) >> n_bits) {
+ return BAD_ARGUMENT;
+ }
+
+ if (!NXM_IS_NX_REG(dst->header)) {
+ return BAD_ARGUMENT;
+ }
+
+ return 0;
+}
+\f
+/* nxm_execute_reg_move(), nxm_execute_reg_load(). */
+
+static uint64_t
+nxm_read_field(const struct nxm_field *src, const struct flow *flow)
+{
+ switch (src->index) {
+ case NFI_NXM_OF_IN_PORT:
+ return flow->in_port == ODPP_LOCAL ? OFPP_LOCAL : flow->in_port;
+
+ case NFI_NXM_OF_ETH_DST:
+ return eth_addr_to_uint64(flow->dl_dst);
+
+ case NFI_NXM_OF_ETH_SRC:
+ return eth_addr_to_uint64(flow->dl_src);
+
+ case NFI_NXM_OF_ETH_TYPE:
+ return ntohs(flow->dl_type);
+
+ case NFI_NXM_OF_VLAN_TCI:
+ if (flow->dl_vlan == htons(OFP_VLAN_NONE)) {
+ return 0;
+ } else {
+ return (ntohs(flow->dl_vlan & htons(VLAN_VID_MASK))
+ | ((flow->dl_vlan_pcp << VLAN_PCP_SHIFT) & VLAN_PCP_MASK)
+ | VLAN_CFI);
+ }
+
+ case NFI_NXM_OF_IP_TOS:
+ return flow->nw_tos;
+
+ case NFI_NXM_OF_IP_PROTO:
+ case NFI_NXM_OF_ARP_OP:
+ return flow->nw_proto;
+
+ case NFI_NXM_OF_IP_SRC:
+ case NFI_NXM_OF_ARP_SPA:
+ return ntohl(flow->nw_src);
+
+ case NFI_NXM_OF_IP_DST:
+ case NFI_NXM_OF_ARP_TPA:
+ return ntohl(flow->nw_dst);
+
+ case NFI_NXM_OF_TCP_SRC:
+ case NFI_NXM_OF_UDP_SRC:
+ return ntohs(flow->tp_src);
+
+ case NFI_NXM_OF_TCP_DST:
+ case NFI_NXM_OF_UDP_DST:
+ return ntohs(flow->tp_dst);
+
+ case NFI_NXM_OF_ICMP_TYPE:
+ return ntohs(flow->tp_src) & 0xff;
+
+ case NFI_NXM_OF_ICMP_CODE:
+ return ntohs(flow->tp_dst) & 0xff;
+
+ case NFI_NXM_NX_TUN_ID:
+ return ntohl(flow->tun_id);
+
+#define NXM_READ_REGISTER(IDX) \
+ case NFI_NXM_NX_REG##IDX: \
+ return flow->regs[IDX]; \
+ case NFI_NXM_NX_REG##IDX##_W: \
+ NOT_REACHED();
+
+ NXM_READ_REGISTER(0);
+#if FLOW_N_REGS >= 2
+ NXM_READ_REGISTER(1);
+#endif
+#if FLOW_N_REGS >= 3
+ NXM_READ_REGISTER(2);
+#endif
+#if FLOW_N_REGS >= 4
+ NXM_READ_REGISTER(3);
+#endif
+#if FLOW_N_REGS > 4
+#error
+#endif
+
+ case NFI_NXM_OF_ETH_DST_W:
+ case NFI_NXM_OF_VLAN_TCI_W:
+ case NFI_NXM_OF_IP_SRC_W:
+ case NFI_NXM_OF_IP_DST_W:
+ case NFI_NXM_OF_ARP_SPA_W:
+ case NFI_NXM_OF_ARP_TPA_W:
+ case N_NXM_FIELDS:
+ NOT_REACHED();
+ }
+
+ NOT_REACHED();
+}
+
+void
+nxm_execute_reg_move(const struct nx_action_reg_move *action,
+ struct flow *flow)
+{
+ /* Preparation. */
+ int n_bits = ntohs(action->n_bits);
+ uint64_t mask = n_bits == 64 ? UINT64_MAX : (UINT64_C(1) << n_bits) - 1;
+
+ /* Get the interesting bits of the source field. */
+ const struct nxm_field *src = nxm_field_lookup(ntohl(action->src));
+ int src_ofs = ntohs(action->src_ofs);
+ uint64_t src_data = nxm_read_field(src, flow) & (mask << src_ofs);
+
+ /* Get the remaining bits of the destination field. */
+ const struct nxm_field *dst = nxm_field_lookup(ntohl(action->dst));
+ int dst_ofs = ntohs(action->dst_ofs);
+ uint64_t dst_data = nxm_read_field(dst, flow) & ~(mask << dst_ofs);
+
+ /* Get the final value. */
+ uint64_t new_data = dst_data | ((src_data >> src_ofs) << dst_ofs);
+
+ /* Store the result. */
+ if (NXM_IS_NX_REG(dst->header)) {
+ flow->regs[NXM_NX_REG_IDX(dst->header)] = new_data;
+ } else if (dst->header == NXM_OF_VLAN_TCI) {
+ ovs_be16 vlan_tci = htons(new_data & VLAN_CFI ? new_data : 0);
+ flow->dl_vlan = htons(vlan_tci_to_vid(vlan_tci));
+ flow->dl_vlan_pcp = vlan_tci_to_pcp(vlan_tci);
+ } else if (dst->header == NXM_NX_TUN_ID) {
+ flow->tun_id = htonl(new_data);
+ } else {
+ NOT_REACHED();
+ }
+}
+
+void
+nxm_execute_reg_load(const struct nx_action_reg_load *action,
+ struct flow *flow)
+{
+ /* Preparation. */
+ int n_bits = (ntohs(action->ofs_nbits) & 0x3f) + 1;
+ uint32_t mask = n_bits == 32 ? UINT32_MAX : (UINT32_C(1) << n_bits) - 1;
+ uint32_t *reg = &flow->regs[NXM_NX_REG_IDX(ntohl(action->dst))];
+
+ /* Get source data. */
+ uint32_t src_data = ntohll(action->value);
+
+ /* Get remaining bits of the destination field. */
+ int dst_ofs = ntohs(action->ofs_nbits) >> 6;
+ uint32_t dst_data = *reg & ~(mask << dst_ofs);
+
+ *reg = dst_data | (src_data << dst_ofs);
+}
projects / openvswitch / blobdiff