-/* Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014 Nicira, Inc.
+/* Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 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 "dp-packet.h"
#include "flow.h"
-#include "meta-flow.h"
+#include "openvswitch/meta-flow.h"
#include "odp-util.h"
-#include "ofpbuf.h"
+#include "openvswitch/ofpbuf.h"
#include "ofproto-dpif-mirror.h"
#include "ofproto-dpif-rid.h"
#include "ofproto-dpif.h"
#include "ofproto.h"
#include "stp.h"
#include "ovs-lldp.h"
+#include "uuid.h"
struct bfd;
struct bond;
struct xlate_cache;
struct xlate_out {
- /* Wildcards relevant in translation. Any fields that were used to
- * calculate the action must be set for caching and kernel
- * wildcarding to work. For example, if the flow lookup involved
- * performing the "normal" action on IPv4 and ARP packets, 'wc'
- * would have the 'in_port' (always set), 'dl_type' (flow match),
- * 'vlan_tci' (normal action), and 'dl_dst' (normal action) fields
- * set. */
- struct flow_wildcards wc;
-
- enum slow_path_reason slow; /* 0 if fast path may be used. */
- bool fail_open; /* Initial rule is fail open? */
- bool has_learn; /* Actions include NXAST_LEARN? */
- bool has_normal; /* Actions output to OFPP_NORMAL? */
- bool has_fin_timeout; /* Actions include NXAST_FIN_TIMEOUT? */
- ofp_port_t nf_output_iface; /* Output interface index for NetFlow. */
- mirror_mask_t mirrors; /* Bitmap of associated mirrors. */
-
- /* Recirculation IDs on which references are held. */
- unsigned n_recircs;
- union {
- uint32_t recirc[2]; /* When n_recircs == 1 or 2 */
- uint32_t *recircs; /* When 'n_recircs' > 2 */
- };
-
- uint64_t odp_actions_stub[256 / 8];
- struct ofpbuf odp_actions_buf;
- struct ofpbuf *odp_actions;
-};
+ /* Caching exceptions:
+ *
+ * - If 'slow' is nonzero, the translation needs to be slow-pathed for
+ * one reason or another. (The particular value is only important for
+ * explaining to an administrator why the flow is slow-pathed.) This
+ * makes OVS install a datapath flow with a send-to-userspace action.
+ * Only on revalidation will the flow be replaced, if appropriate, by
+ * one that does something else with the traffic.
+ *
+ * - If 'avoid_caching' is true, then OVS won't install a datapath flow
+ * at all. If the reason to avoid caching goes away, the next upcall
+ * will immediately install a correct datapath flow.
+ *
+ * - Otherwise a datapath flow can be installed in the usual way.
+ *
+ * If 'avoid_caching' is true then 'slow' doesn't matter.
+ */
+ enum slow_path_reason slow;
+ bool avoid_caching;
-/* Helpers to abstract the recirculation union away. */
-static inline void
-xlate_out_add_recirc(struct xlate_out *xout, uint32_t id)
-{
- if (OVS_LIKELY(xout->n_recircs < ARRAY_SIZE(xout->recirc))) {
- xout->recirc[xout->n_recircs++] = id;
- } else {
- if (xout->n_recircs == ARRAY_SIZE(xout->recirc)) {
- uint32_t *recircs = xmalloc(sizeof xout->recirc + sizeof id);
-
- memcpy(recircs, xout->recirc, sizeof xout->recirc);
- xout->recircs = recircs;
- } else {
- xout->recircs = xrealloc(xout->recircs,
- (xout->n_recircs + 1) * sizeof id);
- }
- xout->recircs[xout->n_recircs++] = id;
- }
-}
-
-static inline const uint32_t *
-xlate_out_get_recircs(const struct xlate_out *xout)
-{
- if (OVS_LIKELY(xout->n_recircs <= ARRAY_SIZE(xout->recirc))) {
- return xout->recirc;
- } else {
- return xout->recircs;
- }
-}
-
-static inline void
-xlate_out_take_recircs(struct xlate_out *xout)
-{
- if (OVS_UNLIKELY(xout->n_recircs > ARRAY_SIZE(xout->recirc))) {
- free(xout->recircs);
- }
- xout->n_recircs = 0;
-}
-
-static inline void
-xlate_out_free_recircs(struct xlate_out *xout)
-{
- if (OVS_LIKELY(xout->n_recircs <= ARRAY_SIZE(xout->recirc))) {
- for (int i = 0; i < xout->n_recircs; i++) {
- recirc_free_id(xout->recirc[i]);
- }
- } else {
- for (int i = 0; i < xout->n_recircs; i++) {
- recirc_free_id(xout->recircs[i]);
- }
- free(xout->recircs);
- }
-}
+ /* Recirc action IDs on which references are held. */
+ struct recirc_refs recircs;
+};
struct xlate_in {
struct ofproto_dpif *ofproto;
+ ovs_version_t tables_version; /* Lookup in this version. */
/* Flow to which the OpenFlow actions apply. xlate_actions() will modify
* this flow when actions change header fields. */
struct flow flow;
+ /* Pointer to the original flow received during the upcall. xlate_actions()
+ * will never modify this flow. */
+ const struct flow *upcall_flow;
+
/* The packet corresponding to 'flow', or a null pointer if we are
* revalidating without a packet to refer to. */
const struct dp_packet *packet;
/* Should OFPP_NORMAL update the MAC learning table? Should "learn"
- * actions update the flow table?
+ * actions update the flow table? Should FIN_TIMEOUT change the
+ * timeouts? Or should controller action send packet to the controller?
*
* We want to update these tables if we are actually processing a packet,
* or if we are accounting for packets that the datapath has processed, but
- * not if we are just revalidating. */
- bool may_learn;
-
- /* If the caller of xlate_actions() doesn't need the flow_wildcards
- * contained in struct xlate_out. 'skip_wildcards' can be set to true
- * disabling the expensive wildcard computation. When true, 'wc' in struct
- * xlate_out is undefined and should not be read. */
- bool skip_wildcards;
+ * not if we are just revalidating, or if we want to execute the
+ * side-effects later via the xlate cache. */
+ bool allow_side_effects;
/* The rule initiating translation or NULL. If both 'rule' and 'ofpacts'
* are NULL, xlate_actions() will do the initial rule lookup itself. */
* timeouts.) */
uint16_t tcp_flags;
- /* If nonnull, flow translation calls this function just before executing a
- * resubmit or OFPP_TABLE action. In addition, disables logging of traces
- * when the recursion depth is exceeded.
- *
- * 'rule' is the rule being submitted into. It will be null if the
- * resubmit or OFPP_TABLE action didn't find a matching rule.
- *
- * 'recurse' is the resubmit recursion depth at time of invocation.
- *
- * This is normally null so the client has to set it manually after
- * calling xlate_in_init(). */
- void (*resubmit_hook)(struct xlate_in *, struct rule_dpif *rule,
- int recurse);
-
- /* If nonnull, flow translation calls this function to report some
- * significant decision, e.g. to explain why OFPP_NORMAL translation
- * dropped a packet. 'recurse' is the resubmit recursion depth at time of
- * invocation. */
- void (*report_hook)(struct xlate_in *, const char *s, int recurse);
+ /* Set to nonnull to trace the translation. See ofproto-dpif-trace.h for
+ * more information. This points to the list of oftrace nodes to which the
+ * translation should add tracing information (with oftrace_report()). */
+ struct ovs_list *trace;
/* If nonnull, flow translation credits the specified statistics to each
* rule reached through a resubmit or OFPP_TABLE action.
* calling xlate_in_init(). */
const struct dpif_flow_stats *resubmit_stats;
+ /* Counters carried over from a pre-existing translation of a related flow.
+ * This can occur due to, e.g., the translation of an ARP packet that was
+ * generated as the result of outputting to a tunnel port. In that case,
+ * the original flow going to the tunnel is the related flow. Since the
+ * two flows are different, they should not use the same xlate_ctx
+ * structure. However, we still need limit the maximum recursion across
+ * the entire translation.
+ *
+ * These fields are normally set to zero, so the client has to set them
+ * manually after calling xlate_in_init(). In that case, they should be
+ * copied from the same-named fields in the related flow's xlate_ctx.
+ *
+ * These fields are really implementation details; the client doesn't care
+ * about what they mean. See the corresponding fields in xlate_ctx for
+ * real documentation. */
+ int depth;
+ int resubmits;
+
/* If nonnull, flow translation populates this cache with references to all
* modules that are affected by translation. This 'xlate_cache' may be
* passed to xlate_push_stats() to perform the same function as
* calling xlate_in_init(). */
struct xlate_cache *xcache;
- /* Allows callers to optionally supply their own buffer for the resulting
- * odp_actions stored in xlate_out. If NULL, the default buffer will be
- * used. */
+ /* If nonnull, flow translation puts the resulting datapath actions in this
+ * buffer. If null, flow translation will not produce datapath actions. */
struct ofpbuf *odp_actions;
- /* The recirculation context related to this translation, as returned by
- * xlate_lookup. */
- const struct recirc_id_node *recirc;
+ /* If nonnull, flow translation populates this with wildcards relevant in
+ * translation. Any fields that were used to calculate the action are set,
+ * to allow caching and kernel wildcarding to work. For example, if the
+ * flow lookup involved performing the "normal" action on IPv4 and ARP
+ * packets, 'wc' would have the 'in_port' (always set), 'dl_type' (flow
+ * match), 'vlan_tci' (normal action), and 'dl_dst' (normal action) fields
+ * set. */
+ struct flow_wildcards *wc;
+
+ /* The frozen state to be resumed, as returned by xlate_lookup(). */
+ const struct frozen_state *frozen_state;
+
+ /* If true, the packet to be translated is from a packet_out msg. */
+ bool in_packet_out;
+
+ /* ofproto/trace maintains this queue to trace flows that require
+ * recirculation. */
+ struct ovs_list *recirc_queue;
+
+ /* UUID of first non-patch port packet was received on.*/
+ struct uuid xport_uuid;
};
void xlate_ofproto_set(struct ofproto_dpif *, const char *name, struct dpif *,
struct rstp *, const struct mcast_snooping *,
const struct mbridge *, const struct dpif_sflow *,
const struct dpif_ipfix *, const struct netflow *,
- bool forward_bpdu,
- bool has_in_band, bool enable_recirc,
- bool variable_length_userdata,
- size_t mpls_label_stack_length,
- bool masked_set_action);
+ bool forward_bpdu, bool has_in_band,
+ const struct dpif_backer_support *support);
void xlate_remove_ofproto(struct ofproto_dpif *);
void xlate_bundle_set(struct ofproto_dpif *, struct ofbundle *,
- const char *name, enum port_vlan_mode, int vlan,
- unsigned long *trunks, bool use_priority_tags,
+ const char *name, enum port_vlan_mode,
+ uint16_t qinq_ethtype, int vlan,
+ unsigned long *trunks, unsigned long *cvlans,
+ bool use_priority_tags,
const struct bond *, const struct lacp *,
- bool floodable);
+ bool floodable, bool protected);
void xlate_bundle_remove(struct ofbundle *);
void xlate_ofport_set(struct ofproto_dpif *, struct ofbundle *,
struct dpif_sflow **, struct netflow **,
ofp_port_t *ofp_in_port);
-void xlate_actions(struct xlate_in *, struct xlate_out *);
-void xlate_in_init(struct xlate_in *, struct ofproto_dpif *,
+enum xlate_error {
+ XLATE_OK = 0,
+ XLATE_BRIDGE_NOT_FOUND,
+ XLATE_RECURSION_TOO_DEEP,
+ XLATE_TOO_MANY_RESUBMITS,
+ XLATE_STACK_TOO_DEEP,
+ XLATE_NO_RECIRCULATION_CONTEXT,
+ XLATE_RECIRCULATION_CONFLICT,
+ XLATE_TOO_MANY_MPLS_LABELS,
+ XLATE_INVALID_TUNNEL_METADATA,
+ XLATE_UNSUPPORTED_PACKET_TYPE,
+};
+
+const char *xlate_strerror(enum xlate_error error);
+
+enum xlate_error xlate_actions(struct xlate_in *, struct xlate_out *);
+
+void xlate_in_init(struct xlate_in *, struct ofproto_dpif *, ovs_version_t,
const struct flow *, ofp_port_t in_port, struct rule_dpif *,
- uint16_t tcp_flags, const struct dp_packet *packet);
+ uint16_t tcp_flags, const struct dp_packet *packet,
+ struct flow_wildcards *, struct ofpbuf *odp_actions);
void xlate_out_uninit(struct xlate_out *);
-void xlate_actions_for_side_effects(struct xlate_in *);
-void xlate_out_copy(struct xlate_out *dst, const struct xlate_out *src);
-int xlate_send_packet(const struct ofport_dpif *, struct dp_packet *);
+enum ofperr xlate_resume(struct ofproto_dpif *,
+ const struct ofputil_packet_in_private *,
+ struct ofpbuf *odp_actions, enum slow_path_reason *,
+ struct flow *, struct xlate_cache *);
+int xlate_send_packet(const struct ofport_dpif *, bool oam, struct dp_packet *);
+
+void xlate_mac_learning_update(const struct ofproto_dpif *ofproto,
+ ofp_port_t in_port, struct eth_addr dl_src,
+ int vlan, bool is_grat_arp);
-struct xlate_cache *xlate_cache_new(void);
-void xlate_push_stats(struct xlate_cache *, const struct dpif_flow_stats *);
-void xlate_cache_clear(struct xlate_cache *);
-void xlate_cache_delete(struct xlate_cache *);
+void xlate_set_support(const struct ofproto_dpif *,
+ const struct dpif_backer_support *);
void xlate_txn_start(void);
void xlate_txn_commit(void);
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