This is the first patch in the patch-set to support dynamic rebalancing
of offloaded flows.
The patch detects OOR condition on a netdev port when ENOSPC error is
returned by TC-Flower while adding a flow rule. A new structure is added
to the netdev called "netdev_hw_info", to store OOR related information
required to perform dynamic offload-rebalancing.
Signed-off-by: Sriharsha Basavapatna <sriharsha.basavapa...@broadcom.com>
Co-authored-by: Venkat Duvvuru <venkatkumar.duvv...@broadcom.com>
Signed-off-by: Venkat Duvvuru <venkatkumar.duvv...@broadcom.com>
Reviewed-by: Sathya Perla <sathya.pe...@broadcom.com>
---
lib/dpif-netlink.c | 11 ++++++++++-
lib/flow.c | 27 +++++++++++++++++++++++++++
lib/flow.h | 1 +
lib/netdev-provider.h | 7 +++++++
lib/netdev.c | 2 ++
5 files changed, 47 insertions(+), 1 deletion(-)
diff --git a/lib/dpif-netlink.c b/lib/dpif-netlink.c
index aa9bbd946..ed3ca3f98 100644
--- a/lib/dpif-netlink.c
+++ b/lib/dpif-netlink.c
@@ -2175,7 +2175,16 @@ parse_flow_put(struct dpif_netlink *dpif, struct
dpif_flow_put *put)
VLOG_DBG("added flow");
} else if (err != EEXIST) {
- VLOG_ERR_RL(&rl, "failed to offload flow: %s", ovs_strerror(err));
+ struct netdev *oor_netdev = NULL;
+ if (err == ENOSPC) {
+ oor_netdev = flow_get_tunnel_netdev(&match.flow.tunnel);
+ if (!oor_netdev) {
+ oor_netdev = dev;
+ }
+ oor_netdev->hw_info.oor = true;
+ }
+ VLOG_ERR_RL(&rl, "failed to offload flow: %s: %s", ovs_strerror(err),
+ (oor_netdev ? oor_netdev->name : dev->name));
}
out:
diff --git a/lib/flow.c b/lib/flow.c
index 75ca45672..912afc99d 100644
--- a/lib/flow.c
+++ b/lib/flow.c
@@ -19,6 +19,7 @@
#include <errno.h>
#include <inttypes.h>
#include <limits.h>
+#include <net/if.h>
#include <netinet/in.h>
#include <netinet/icmp6.h>
#include <netinet/ip6.h>
@@ -41,6 +42,8 @@
#include "unaligned.h"
#include "util.h"
#include "openvswitch/nsh.h"
+#include "ovs-router.h"
+#include "lib/netdev-provider.h"
COVERAGE_DEFINE(flow_extract);
COVERAGE_DEFINE(miniflow_malloc);
@@ -3299,3 +3302,27 @@ flow_limit_vlans(int vlan_limit)
flow_vlan_limit = MIN(vlan_limit, FLOW_MAX_VLAN_HEADERS);
}
}
+
+struct netdev *
+flow_get_tunnel_netdev(struct flow_tnl *tunnel)
+{
+ struct netdev *tunnel_netdev;
+ char iface[IFNAMSIZ];
+ struct in6_addr ip6;
+ struct in6_addr gw;
+
+ if (tunnel->ip_src) {
+ in6_addr_set_mapped_ipv4(&ip6, tunnel->ip_src);
+ } else if (ipv6_addr_is_set(&tunnel->ipv6_src)) {
+ ip6 = tunnel->ipv6_src;
+ } else {
+ return NULL;
+ }
+
+ if (!ovs_router_lookup(0, &ip6, iface, NULL, &gw)) {
+ return (NULL);
+ }
+
+ tunnel_netdev = netdev_from_name(iface);
+ return tunnel_netdev;
+}
diff --git a/lib/flow.h b/lib/flow.h
index 5b6585f11..a67abc9c9 100644
--- a/lib/flow.h
+++ b/lib/flow.h
@@ -73,6 +73,7 @@ void flow_extract(struct dp_packet *, struct flow *);
void flow_zero_wildcards(struct flow *, const struct flow_wildcards *);
void flow_unwildcard_tp_ports(const struct flow *, struct flow_wildcards *);
void flow_get_metadata(const struct flow *, struct match *flow_metadata);
+struct netdev *flow_get_tunnel_netdev(struct flow_tnl *tunnel);
const char *ct_state_to_string(uint32_t state);
uint32_t ct_state_from_string(const char *);
diff --git a/lib/netdev-provider.h b/lib/netdev-provider.h
index 1a572f5b8..62e05619e 100644
--- a/lib/netdev-provider.h
+++ b/lib/netdev-provider.h
@@ -35,6 +35,11 @@ extern "C" {
struct netdev_tnl_build_header_params;
#define NETDEV_NUMA_UNSPEC OVS_NUMA_UNSPEC
+/* Offload-capable (HW) netdev information */
+struct netdev_hw_info {
+ bool oor; /* Out of Offload Resources ? */
+};
+
/* A network device (e.g. an Ethernet device).
*
* Network device implementations may read these members but should not modify
@@ -80,6 +85,8 @@ struct netdev {
int n_rxq;
struct shash_node *node; /* Pointer to element in global map. */
struct ovs_list saved_flags_list; /* Contains "struct netdev_saved_flags".
*/
+
+ struct netdev_hw_info hw_info; /* offload-capable netdev info */
};
static inline void
diff --git a/lib/netdev.c b/lib/netdev.c
index 82ffeb901..b17f0563f 100644
--- a/lib/netdev.c
+++ b/lib/netdev.c
@@ -415,6 +415,7 @@ netdev_open(const char *name, const char *type, struct
netdev **netdevp)
netdev->reconfigure_seq = seq_create();
netdev->last_reconfigure_seq =
seq_read(netdev->reconfigure_seq);
+ netdev->hw_info.oor = false;
netdev->node = shash_add(&netdev_shash, name, netdev);
/* By default enable one tx and rx queue per netdev. */
@@ -2472,6 +2473,7 @@ netdev_free_custom_stats_counters(struct
netdev_custom_stats *custom_stats)
}
#ifdef __linux__
+
static void
netdev_ports_flow_init(void)
{
--
2.18.0.rc1.1.g6f333ff
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