[ovs-dev] [PATCH V2 12/14] dpif-netdev: Provide orig_in_port in metadata for tunneled packets
Eli Britstein
elibr at nvidia.com
Wed Feb 10 15:27:00 UTC 2021
From: Sriharsha Basavapatna <sriharsha.basavapatna at broadcom.com>
When an encapsulated packet is recirculated through a TUNNEL_POP
action, the metadata gets reinitialized and the originating physical
port information is lost. When this flow gets processed by the vport
and it needs to be offloaded, we can't figure out the physical port
through which the tunneled packet was received.
Add a new member to the metadata: 'orig_in_port'. This is passed to
the next stage during recirculation and the offload layer can use it
to offload the flow to this physical port.
Signed-off-by: Sriharsha Basavapatna <sriharsha.basavapatna at broadcom.com>
Signed-off-by: Eli Britstein <elibr at nvidia.com>
Reviewed-by: Gaetan Rivet <gaetanr at nvidia.com>
---
lib/dpif-netdev.c | 20 ++++++++++++++------
lib/netdev-offload.h | 1 +
lib/packets.h | 8 +++++++-
3 files changed, 22 insertions(+), 7 deletions(-)
diff --git a/lib/dpif-netdev.c b/lib/dpif-netdev.c
index 7c82a7a27..d3d2672d5 100644
--- a/lib/dpif-netdev.c
+++ b/lib/dpif-netdev.c
@@ -430,6 +430,7 @@ struct dp_flow_offload_item {
struct match match;
struct nlattr *actions;
size_t actions_len;
+ odp_port_t orig_in_port; /* Originating in_port for tnl flows. */
struct ovs_list node;
};
@@ -2695,11 +2696,13 @@ dp_netdev_flow_offload_put(struct dp_flow_offload_item *offload)
}
}
info.flow_mark = mark;
+ info.orig_in_port = offload->orig_in_port;
port = netdev_ports_get(in_port, dpif_type_str);
if (!port) {
goto err_free;
}
+
/* Taking a global 'port_mutex' to fulfill thread safety restrictions for
* the netdev-offload-dpdk module. */
ovs_mutex_lock(&pmd->dp->port_mutex);
@@ -2797,7 +2800,8 @@ queue_netdev_flow_del(struct dp_netdev_pmd_thread *pmd,
static void
queue_netdev_flow_put(struct dp_netdev_pmd_thread *pmd,
struct dp_netdev_flow *flow, struct match *match,
- const struct nlattr *actions, size_t actions_len)
+ const struct nlattr *actions, size_t actions_len,
+ odp_port_t orig_in_port)
{
struct dp_flow_offload_item *offload;
int op;
@@ -2823,6 +2827,7 @@ queue_netdev_flow_put(struct dp_netdev_pmd_thread *pmd,
offload->actions = xmalloc(actions_len);
memcpy(offload->actions, actions, actions_len);
offload->actions_len = actions_len;
+ offload->orig_in_port = orig_in_port;
dp_netdev_append_flow_offload(offload);
}
@@ -3624,7 +3629,8 @@ dp_netdev_get_mega_ufid(const struct match *match, ovs_u128 *mega_ufid)
static struct dp_netdev_flow *
dp_netdev_flow_add(struct dp_netdev_pmd_thread *pmd,
struct match *match, const ovs_u128 *ufid,
- const struct nlattr *actions, size_t actions_len)
+ const struct nlattr *actions, size_t actions_len,
+ odp_port_t orig_in_port)
OVS_REQUIRES(pmd->flow_mutex)
{
struct ds extra_info = DS_EMPTY_INITIALIZER;
@@ -3690,7 +3696,8 @@ dp_netdev_flow_add(struct dp_netdev_pmd_thread *pmd,
cmap_insert(&pmd->flow_table, CONST_CAST(struct cmap_node *, &flow->node),
dp_netdev_flow_hash(&flow->ufid));
- queue_netdev_flow_put(pmd, flow, match, actions, actions_len);
+ queue_netdev_flow_put(pmd, flow, match, actions, actions_len,
+ orig_in_port);
if (OVS_UNLIKELY(!VLOG_DROP_DBG((&upcall_rl)))) {
struct ds ds = DS_EMPTY_INITIALIZER;
@@ -3761,7 +3768,7 @@ flow_put_on_pmd(struct dp_netdev_pmd_thread *pmd,
if (!netdev_flow) {
if (put->flags & DPIF_FP_CREATE) {
dp_netdev_flow_add(pmd, match, ufid, put->actions,
- put->actions_len);
+ put->actions_len, ODPP_NONE);
} else {
error = ENOENT;
}
@@ -3777,7 +3784,7 @@ flow_put_on_pmd(struct dp_netdev_pmd_thread *pmd,
ovsrcu_set(&netdev_flow->actions, new_actions);
queue_netdev_flow_put(pmd, netdev_flow, match,
- put->actions, put->actions_len);
+ put->actions, put->actions_len, ODPP_NONE);
if (stats) {
get_dpif_flow_status(pmd->dp, netdev_flow, stats, NULL);
@@ -7204,6 +7211,7 @@ handle_packet_upcall(struct dp_netdev_pmd_thread *pmd,
ovs_u128 ufid;
int error;
uint64_t cycles = cycles_counter_update(&pmd->perf_stats);
+ odp_port_t orig_in_port = packet->md.orig_in_port;
match.tun_md.valid = false;
miniflow_expand(&key->mf, &match.flow);
@@ -7253,7 +7261,7 @@ handle_packet_upcall(struct dp_netdev_pmd_thread *pmd,
if (OVS_LIKELY(!netdev_flow)) {
netdev_flow = dp_netdev_flow_add(pmd, &match, &ufid,
add_actions->data,
- add_actions->size);
+ add_actions->size, orig_in_port);
}
ovs_mutex_unlock(&pmd->flow_mutex);
uint32_t hash = dp_netdev_flow_hash(&netdev_flow->ufid);
diff --git a/lib/netdev-offload.h b/lib/netdev-offload.h
index b063c43a3..e42205303 100644
--- a/lib/netdev-offload.h
+++ b/lib/netdev-offload.h
@@ -76,6 +76,7 @@ struct offload_info {
bool tc_modify_flow_deleted; /* Indicate the tc modify flow put success
* to delete the original flow. */
+ odp_port_t orig_in_port; /* Originating in_port for tnl flows. */
};
int netdev_flow_flush(struct netdev *);
diff --git a/lib/packets.h b/lib/packets.h
index 481bc22fa..515bb59b1 100644
--- a/lib/packets.h
+++ b/lib/packets.h
@@ -115,6 +115,7 @@ PADDED_MEMBERS_CACHELINE_MARKER(CACHE_LINE_SIZE, cacheline0,
uint32_t ct_mark; /* Connection mark. */
ovs_u128 ct_label; /* Connection label. */
union flow_in_port in_port; /* Input port. */
+ odp_port_t orig_in_port; /* Originating in_port for tunneled packets */
struct conn *conn; /* Cached conntrack connection. */
bool reply; /* True if reply direction. */
bool icmp_related; /* True if ICMP related. */
@@ -143,10 +144,14 @@ BUILD_ASSERT_DECL(offsetof(struct pkt_metadata, cacheline2) ==
static inline void
pkt_metadata_init_tnl(struct pkt_metadata *md)
{
+ odp_port_t orig_in_port;
+
/* Zero up through the tunnel metadata options. The length and table
* are before this and as long as they are empty, the options won't
- * be looked at. */
+ * be looked at. Keep the orig_in_port field. */
+ orig_in_port = md->in_port.odp_port;
memset(md, 0, offsetof(struct pkt_metadata, tunnel.metadata.opts));
+ md->orig_in_port = orig_in_port;
}
static inline void
@@ -173,6 +178,7 @@ pkt_metadata_init(struct pkt_metadata *md, odp_port_t port)
md->tunnel.ip_dst = 0;
md->tunnel.ipv6_dst = in6addr_any;
md->in_port.odp_port = port;
+ md->orig_in_port = port;
md->conn = NULL;
}
--
2.28.0.546.g385c171
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