/*
- * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013 Nicira, Inc.
+ * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
#include "ofpbuf.h"
#include "openflow/openflow.h"
#include "packets.h"
+#include "odp-util.h"
#include "random.h"
#include "unaligned.h"
parse_mpls(struct ofpbuf *b, struct flow *flow)
{
struct mpls_hdr *mh;
- bool top = true;
+ int idx = 0;
while ((mh = ofpbuf_try_pull(b, sizeof *mh))) {
- if (top) {
- top = false;
- flow->mpls_lse = mh->mpls_lse;
+ if (idx < FLOW_MAX_MPLS_LABELS) {
+ flow->mpls_lse[idx++] = mh->mpls_lse;
}
if (mh->mpls_lse & htonl(MPLS_BOS_MASK)) {
break;
}
-/* Initializes 'flow' members from 'packet', 'skb_priority', 'tnl', and
- * 'in_port'.
+/* Initializes 'flow' members from 'packet' and 'md'
*
* Initializes 'packet' header pointers as follows:
*
* present and has a correct length, and otherwise NULL.
*/
void
-flow_extract(struct ofpbuf *packet, uint32_t skb_priority, uint32_t pkt_mark,
- const struct flow_tnl *tnl, const union flow_in_port *in_port,
+flow_extract(struct ofpbuf *packet, const struct pkt_metadata *md,
struct flow *flow)
{
struct ofpbuf b = *packet;
memset(flow, 0, sizeof *flow);
- if (tnl) {
- ovs_assert(tnl != &flow->tunnel);
- flow->tunnel = *tnl;
+ if (md) {
+ flow->tunnel = md->tunnel;
+ flow->in_port = md->in_port;
+ flow->skb_priority = md->skb_priority;
+ flow->pkt_mark = md->pkt_mark;
}
- if (in_port) {
- flow->in_port = *in_port;
- }
- flow->skb_priority = skb_priority;
- flow->pkt_mark = pkt_mark;
packet->l2 = b.data;
packet->l2_5 = NULL;
void
flow_get_metadata(const struct flow *flow, struct flow_metadata *fmd)
{
- BUILD_ASSERT_DECL(FLOW_WC_SEQ == 23);
+ BUILD_ASSERT_DECL(FLOW_WC_SEQ == 25);
+ fmd->dp_hash = flow->dp_hash;
+ fmd->recirc_id = flow->recirc_id;
fmd->tun_id = flow->tunnel.tun_id;
fmd->tun_src = flow->tunnel.ip_src;
fmd->tun_dst = flow->tunnel.ip_dst;
wc->masks.regs[idx] = mask;
}
+/* Calculates the 5-tuple hash from the given flow. */
+uint32_t
+flow_hash_5tuple(const struct flow *flow, uint32_t basis)
+{
+ uint32_t hash = 0;
+
+ if (!flow) {
+ return 0;
+ }
+
+ hash = mhash_add(basis, (OVS_FORCE uint32_t) flow->nw_src);
+ hash = mhash_add(hash, (OVS_FORCE uint32_t) flow->nw_dst);
+ hash = mhash_add(hash, ((OVS_FORCE uint32_t) flow->tp_src << 16)
+ | (OVS_FORCE uint32_t) flow->tp_dst);
+ hash = mhash_add(hash, flow->nw_proto);
+
+ return mhash_finish(hash, 13);
+}
+
/* Hashes 'flow' based on its L2 through L4 protocol information. */
uint32_t
flow_hash_symmetric_l4(const struct flow *flow, uint32_t basis)
flow->vlan_tci |= htons((pcp << VLAN_PCP_SHIFT) | VLAN_CFI);
}
+/* Returns the number of MPLS LSEs present in 'flow'
+ *
+ * Returns 0 if the 'dl_type' of 'flow' is not an MPLS ethernet type.
+ * Otherwise traverses 'flow''s MPLS label stack stopping at the
+ * first entry that has the BoS bit set. If no such entry exists then
+ * the maximum number of LSEs that can be stored in 'flow' is returned.
+ */
+int
+flow_count_mpls_labels(const struct flow *flow, struct flow_wildcards *wc)
+{
+ if (wc) {
+ wc->masks.dl_type = OVS_BE16_MAX;
+ }
+ if (eth_type_mpls(flow->dl_type)) {
+ int i;
+ int len = FLOW_MAX_MPLS_LABELS;
+
+ for (i = 0; i < len; i++) {
+ if (wc) {
+ wc->masks.mpls_lse[i] |= htonl(MPLS_BOS_MASK);
+ }
+ if (flow->mpls_lse[i] & htonl(MPLS_BOS_MASK)) {
+ return i + 1;
+ }
+ }
+
+ return len;
+ } else {
+ return 0;
+ }
+}
+
+/* Returns the number consecutive of MPLS LSEs, starting at the
+ * innermost LSE, that are common in 'a' and 'b'.
+ *
+ * 'an' must be flow_count_mpls_labels(a).
+ * 'bn' must be flow_count_mpls_labels(b).
+ */
+int
+flow_count_common_mpls_labels(const struct flow *a, int an,
+ const struct flow *b, int bn,
+ struct flow_wildcards *wc)
+{
+ int min_n = MIN(an, bn);
+ if (min_n == 0) {
+ return 0;
+ } else {
+ int common_n = 0;
+ int a_last = an - 1;
+ int b_last = bn - 1;
+ int i;
+
+ for (i = 0; i < min_n; i++) {
+ if (wc) {
+ wc->masks.mpls_lse[a_last - i] = OVS_BE32_MAX;
+ wc->masks.mpls_lse[b_last - i] = OVS_BE32_MAX;
+ }
+ if (a->mpls_lse[a_last - i] != b->mpls_lse[b_last - i]) {
+ break;
+ } else {
+ common_n++;
+ }
+ }
+
+ return common_n;
+ }
+}
+
+/* Adds a new outermost MPLS label to 'flow' and changes 'flow''s Ethernet type
+ * to 'mpls_eth_type', which must be an MPLS Ethertype.
+ *
+ * If the new label is the first MPLS label in 'flow', it is generated as;
+ *
+ * - label: 2, if 'flow' is IPv6, otherwise 0.
+ *
+ * - TTL: IPv4 or IPv6 TTL, if present and nonzero, otherwise 64.
+ *
+ * - TC: IPv4 or IPv6 TOS, if present, otherwise 0.
+ *
+ * - BoS: 1.
+ *
+ * If the new label is the second or label MPLS label in 'flow', it is
+ * generated as;
+ *
+ * - label: Copied from outer label.
+ *
+ * - TTL: Copied from outer label.
+ *
+ * - TC: Copied from outer label.
+ *
+ * - BoS: 0.
+ *
+ * 'n' must be flow_count_mpls_labels(flow). 'n' must be less than
+ * FLOW_MAX_MPLS_LABELS (because otherwise flow->mpls_lse[] would overflow).
+ */
+void
+flow_push_mpls(struct flow *flow, int n, ovs_be16 mpls_eth_type,
+ struct flow_wildcards *wc)
+{
+ ovs_assert(eth_type_mpls(mpls_eth_type));
+ ovs_assert(n < FLOW_MAX_MPLS_LABELS);
+
+ memset(wc->masks.mpls_lse, 0xff, sizeof wc->masks.mpls_lse);
+ if (n) {
+ int i;
+
+ for (i = n; i >= 1; i--) {
+ flow->mpls_lse[i] = flow->mpls_lse[i - 1];
+ }
+ flow->mpls_lse[0] = (flow->mpls_lse[1]
+ & htonl(~MPLS_BOS_MASK));
+ } else {
+ int label = 0; /* IPv4 Explicit Null. */
+ int tc = 0;
+ int ttl = 64;
+
+ if (flow->dl_type == htons(ETH_TYPE_IPV6)) {
+ label = 2;
+ }
+
+ if (is_ip_any(flow)) {
+ tc = (flow->nw_tos & IP_DSCP_MASK) >> 2;
+ wc->masks.nw_tos |= IP_DSCP_MASK;
+
+ if (flow->nw_ttl) {
+ ttl = flow->nw_ttl;
+ }
+ wc->masks.nw_ttl = 0xff;
+ }
+
+ flow->mpls_lse[0] = set_mpls_lse_values(ttl, tc, 1, htonl(label));
+
+ /* Clear all L3 and L4 fields. */
+ BUILD_ASSERT(FLOW_WC_SEQ == 25);
+ memset((char *) flow + FLOW_SEGMENT_2_ENDS_AT, 0,
+ sizeof(struct flow) - FLOW_SEGMENT_2_ENDS_AT);
+ }
+ flow->dl_type = mpls_eth_type;
+}
+
+/* Tries to remove the outermost MPLS label from 'flow'. Returns true if
+ * successful, false otherwise. On success, sets 'flow''s Ethernet type to
+ * 'eth_type'.
+ *
+ * 'n' must be flow_count_mpls_labels(flow). */
+bool
+flow_pop_mpls(struct flow *flow, int n, ovs_be16 eth_type,
+ struct flow_wildcards *wc)
+{
+ int i;
+
+ if (n == 0) {
+ /* Nothing to pop. */
+ return false;
+ } else if (n == FLOW_MAX_MPLS_LABELS
+ && !(flow->mpls_lse[n - 1] & htonl(MPLS_BOS_MASK))) {
+ /* Can't pop because we don't know what to fill in mpls_lse[n - 1]. */
+ return false;
+ }
+
+ memset(wc->masks.mpls_lse, 0xff, sizeof wc->masks.mpls_lse);
+ for (i = 1; i < n; i++) {
+ flow->mpls_lse[i - 1] = flow->mpls_lse[i];
+ }
+ flow->mpls_lse[n - 1] = 0;
+ flow->dl_type = eth_type;
+ return true;
+}
+
/* Sets the MPLS Label that 'flow' matches to 'label', which is interpreted
* as an OpenFlow 1.1 "mpls_label" value. */
void
-flow_set_mpls_label(struct flow *flow, ovs_be32 label)
+flow_set_mpls_label(struct flow *flow, int idx, ovs_be32 label)
{
- set_mpls_lse_label(&flow->mpls_lse, label);
+ set_mpls_lse_label(&flow->mpls_lse[idx], label);
}
/* Sets the MPLS TTL that 'flow' matches to 'ttl', which should be in the
* range 0...255. */
void
-flow_set_mpls_ttl(struct flow *flow, uint8_t ttl)
+flow_set_mpls_ttl(struct flow *flow, int idx, uint8_t ttl)
{
- set_mpls_lse_ttl(&flow->mpls_lse, ttl);
+ set_mpls_lse_ttl(&flow->mpls_lse[idx], ttl);
}
/* Sets the MPLS TC that 'flow' matches to 'tc', which should be in the
* range 0...7. */
void
-flow_set_mpls_tc(struct flow *flow, uint8_t tc)
+flow_set_mpls_tc(struct flow *flow, int idx, uint8_t tc)
{
- set_mpls_lse_tc(&flow->mpls_lse, tc);
+ set_mpls_lse_tc(&flow->mpls_lse[idx], tc);
}
/* Sets the MPLS BOS bit that 'flow' matches to which should be 0 or 1. */
void
-flow_set_mpls_bos(struct flow *flow, uint8_t bos)
+flow_set_mpls_bos(struct flow *flow, int idx, uint8_t bos)
{
- set_mpls_lse_bos(&flow->mpls_lse, bos);
+ set_mpls_lse_bos(&flow->mpls_lse[idx], bos);
}
+/* Sets the entire MPLS LSE. */
+void
+flow_set_mpls_lse(struct flow *flow, int idx, ovs_be32 lse)
+{
+ flow->mpls_lse[idx] = lse;
+}
static void
flow_compose_l4(struct ofpbuf *b, const struct flow *flow)
}
if (eth_type_mpls(flow->dl_type)) {
+ int n;
+
b->l2_5 = b->l3;
- push_mpls(b, flow->dl_type, flow->mpls_lse);
+ for (n = 1; n < FLOW_MAX_MPLS_LABELS; n++) {
+ if (flow->mpls_lse[n - 1] & htonl(MPLS_BOS_MASK)) {
+ break;
+ }
+ }
+ while (n > 0) {
+ push_mpls(b, flow->dl_type, flow->mpls_lse[--n]);
+ }
}
}
\f
git://git.onelab.eu / sliver-openvswitch.git / blobdiff