[ovs-dev,v6] netdev-dpdk: add support for the RTE_ETH_EVENT_INTR_RESET event
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Message ID 20191111140205.115245.76451.stgit@netdev64
State New
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Series
  • [ovs-dev,v6] netdev-dpdk: add support for the RTE_ETH_EVENT_INTR_RESET event
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Commit Message

Eelco Chaudron Nov. 11, 2019, 2:02 p.m. UTC
Currently, OVS does not register and therefore not handle the
interface reset event from the DPDK framework. This would cause a
problem in cases where a VF is used as an interface, and its
configuration changes.

As an example in the following scenario the MAC change is not
detected/acted upon until OVS is restarted without the patch applied:

  $ echo 1 > /sys/bus/pci/devices/0000:05:00.1/sriov_numvfs
  $ ovs-vsctl add-port ovs_pvp_br0 dpdk0 -- \
            set Interface dpdk0 type=dpdk -- \
            set Interface dpdk0 options:dpdk-devargs=0000:05:0a.0

  $ ip link set p5p2 vf 0 mac 52:54:00:92:d3:33

Requires patch "bridge: Allow manual notifications about interfaces' updates."

Signed-off-by: Eelco Chaudron <echaudro@redhat.com>
---
v5 -> v6:
  Moved the if_notifier_manual_report() function till after the
  actual reset of the interface to make it more clear that it's
  supposed to happen AFTER the reset.

  Removed empty line in the code

v4 -> v5:
  Using new if_notifier_manual_report() API

v3 -> v4:
  Add support for if-notification to make sure set_config()
  gets called

v2 -> v3:
v1 -> v2:
  Fixed Ilya's comments

 lib/netdev-dpdk.c |   54 +++++++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 52 insertions(+), 2 deletions(-)

Comments

Eelco Chaudron Dec. 4, 2019, 3:20 p.m. UTC | #1
Any comments on this patch?

Cheers,

Eelco


On 11 Nov 2019, at 15:02, Eelco Chaudron wrote:

> Currently, OVS does not register and therefore not handle the
> interface reset event from the DPDK framework. This would cause a
> problem in cases where a VF is used as an interface, and its
> configuration changes.
>
> As an example in the following scenario the MAC change is not
> detected/acted upon until OVS is restarted without the patch applied:
>
>   $ echo 1 > /sys/bus/pci/devices/0000:05:00.1/sriov_numvfs
>   $ ovs-vsctl add-port ovs_pvp_br0 dpdk0 -- \
>             set Interface dpdk0 type=dpdk -- \
>             set Interface dpdk0 options:dpdk-devargs=0000:05:0a.0
>
>   $ ip link set p5p2 vf 0 mac 52:54:00:92:d3:33
>
> Requires patch "bridge: Allow manual notifications about interfaces' 
> updates."
>
> Signed-off-by: Eelco Chaudron <echaudro@redhat.com>
> ---
> v5 -> v6:
>   Moved the if_notifier_manual_report() function till after the
>   actual reset of the interface to make it more clear that it's
>   supposed to happen AFTER the reset.
>
>   Removed empty line in the code
>
> v4 -> v5:
>   Using new if_notifier_manual_report() API
>
> v3 -> v4:
>   Add support for if-notification to make sure set_config()
>   gets called
>
> v2 -> v3:
> v1 -> v2:
>   Fixed Ilya's comments
>
>  lib/netdev-dpdk.c |   54 
> +++++++++++++++++++++++++++++++++++++++++++++++++++--
>  1 file changed, 52 insertions(+), 2 deletions(-)
>
> diff --git a/lib/netdev-dpdk.c b/lib/netdev-dpdk.c
> index 4805783..cb57b96 100644
> --- a/lib/netdev-dpdk.c
> +++ b/lib/netdev-dpdk.c
> @@ -46,6 +46,7 @@
>  #include "dpdk.h"
>  #include "dpif-netdev.h"
>  #include "fatal-signal.h"
> +#include "if-notifier.h"
>  #include "netdev-provider.h"
>  #include "netdev-vport.h"
>  #include "odp-util.h"
> @@ -396,6 +397,8 @@ struct netdev_dpdk {
>          bool attached;
>          /* If true, rte_eth_dev_start() was successfully called */
>          bool started;
> +        bool reset_needed;
> +        /* 1 pad byte here. */
>          struct eth_addr hwaddr;
>          int mtu;
>          int socket_id;
> @@ -1173,6 +1176,8 @@ common_construct(struct netdev *netdev, 
> dpdk_port_t port_no,
>      ovsrcu_index_init(&dev->vid, -1);
>      dev->vhost_reconfigured = false;
>      dev->attached = false;
> +    dev->started = false;
> +    dev->reset_needed = false;
>
>      ovsrcu_init(&dev->qos_conf, NULL);
>
> @@ -1769,6 +1774,34 @@ netdev_dpdk_process_devargs(struct netdev_dpdk 
> *dev,
>      return new_port_id;
>  }
>
> +static int
> +dpdk_eth_event_callback(dpdk_port_t port_id, enum rte_eth_event_type 
> type,
> +                        void *param OVS_UNUSED, void *ret_param 
> OVS_UNUSED)
> +{
> +    struct netdev_dpdk *dev;
> +
> +    switch ((int) type) {
> +    case RTE_ETH_EVENT_INTR_RESET:
> +        ovs_mutex_lock(&dpdk_mutex);
> +        dev = netdev_dpdk_lookup_by_port_id(port_id);
> +        if (dev) {
> +            ovs_mutex_lock(&dev->mutex);
> +            dev->reset_needed = true;
> +            netdev_request_reconfigure(&dev->up);
> +            VLOG_DBG_RL(&rl, "%s: Device reset requested.",
> +                        netdev_get_name(&dev->up));
> +            ovs_mutex_unlock(&dev->mutex);
> +        }
> +        ovs_mutex_unlock(&dpdk_mutex);
> +        break;
> +
> +    default:
> +        /* Ignore all other types. */
> +        break;
> +   }
> +   return 0;
> +}
> +
>  static void
>  dpdk_set_rxq_config(struct netdev_dpdk *dev, const struct smap *args)
>      OVS_REQUIRES(dev->mutex)
> @@ -3807,6 +3840,8 @@ netdev_dpdk_class_init(void)
>      /* This function can be called for different classes.  The 
> initialization
>       * needs to be done only once */
>      if (ovsthread_once_start(&once)) {
> +        int ret;
> +
>          ovs_thread_create("dpdk_watchdog", dpdk_watchdog, NULL);
>          unixctl_command_register("netdev-dpdk/set-admin-state",
>                                   "[netdev] up|down", 1, 2,
> @@ -3820,6 +3855,14 @@ netdev_dpdk_class_init(void)
>                                   "[netdev]", 0, 1,
>                                   netdev_dpdk_get_mempool_info, NULL);
>
> +        ret = rte_eth_dev_callback_register(RTE_ETH_ALL,
> +                                            RTE_ETH_EVENT_INTR_RESET,
> +                                            dpdk_eth_event_callback, 
> NULL);
> +        if (ret != 0) {
> +            VLOG_ERR("Ethernet device callback register error: %s",
> +                     rte_strerror(-ret));
> +        }
> +
>          ovsthread_once_done(&once);
>      }
>
> @@ -4180,13 +4223,20 @@ netdev_dpdk_reconfigure(struct netdev *netdev)
>          && dev->rxq_size == dev->requested_rxq_size
>          && dev->txq_size == dev->requested_txq_size
>          && dev->socket_id == dev->requested_socket_id
> -        && dev->started) {
> +        && dev->started && !dev->reset_needed) {
>          /* Reconfiguration is unnecessary */
>
>          goto out;
>      }
>
> -    rte_eth_dev_stop(dev->port_id);
> +    if (dev->reset_needed) {
> +        rte_eth_dev_reset(dev->port_id);
> +        if_notifier_manual_report();
> +        dev->reset_needed = false;
> +    } else {
> +        rte_eth_dev_stop(dev->port_id);
> +    }
> +
>      dev->started = false;
>
>      err = netdev_dpdk_mempool_configure(dev);
>
> _______________________________________________
> dev mailing list
> dev@openvswitch.org
> https://mail.openvswitch.org/mailman/listinfo/ovs-dev

Patch
diff mbox series

diff --git a/lib/netdev-dpdk.c b/lib/netdev-dpdk.c
index 4805783..cb57b96 100644
--- a/lib/netdev-dpdk.c
+++ b/lib/netdev-dpdk.c
@@ -46,6 +46,7 @@ 
 #include "dpdk.h"
 #include "dpif-netdev.h"
 #include "fatal-signal.h"
+#include "if-notifier.h"
 #include "netdev-provider.h"
 #include "netdev-vport.h"
 #include "odp-util.h"
@@ -396,6 +397,8 @@  struct netdev_dpdk {
         bool attached;
         /* If true, rte_eth_dev_start() was successfully called */
         bool started;
+        bool reset_needed;
+        /* 1 pad byte here. */
         struct eth_addr hwaddr;
         int mtu;
         int socket_id;
@@ -1173,6 +1176,8 @@  common_construct(struct netdev *netdev, dpdk_port_t port_no,
     ovsrcu_index_init(&dev->vid, -1);
     dev->vhost_reconfigured = false;
     dev->attached = false;
+    dev->started = false;
+    dev->reset_needed = false;
 
     ovsrcu_init(&dev->qos_conf, NULL);
 
@@ -1769,6 +1774,34 @@  netdev_dpdk_process_devargs(struct netdev_dpdk *dev,
     return new_port_id;
 }
 
+static int
+dpdk_eth_event_callback(dpdk_port_t port_id, enum rte_eth_event_type type,
+                        void *param OVS_UNUSED, void *ret_param OVS_UNUSED)
+{
+    struct netdev_dpdk *dev;
+
+    switch ((int) type) {
+    case RTE_ETH_EVENT_INTR_RESET:
+        ovs_mutex_lock(&dpdk_mutex);
+        dev = netdev_dpdk_lookup_by_port_id(port_id);
+        if (dev) {
+            ovs_mutex_lock(&dev->mutex);
+            dev->reset_needed = true;
+            netdev_request_reconfigure(&dev->up);
+            VLOG_DBG_RL(&rl, "%s: Device reset requested.",
+                        netdev_get_name(&dev->up));
+            ovs_mutex_unlock(&dev->mutex);
+        }
+        ovs_mutex_unlock(&dpdk_mutex);
+        break;
+
+    default:
+        /* Ignore all other types. */
+        break;
+   }
+   return 0;
+}
+
 static void
 dpdk_set_rxq_config(struct netdev_dpdk *dev, const struct smap *args)
     OVS_REQUIRES(dev->mutex)
@@ -3807,6 +3840,8 @@  netdev_dpdk_class_init(void)
     /* This function can be called for different classes.  The initialization
      * needs to be done only once */
     if (ovsthread_once_start(&once)) {
+        int ret;
+
         ovs_thread_create("dpdk_watchdog", dpdk_watchdog, NULL);
         unixctl_command_register("netdev-dpdk/set-admin-state",
                                  "[netdev] up|down", 1, 2,
@@ -3820,6 +3855,14 @@  netdev_dpdk_class_init(void)
                                  "[netdev]", 0, 1,
                                  netdev_dpdk_get_mempool_info, NULL);
 
+        ret = rte_eth_dev_callback_register(RTE_ETH_ALL,
+                                            RTE_ETH_EVENT_INTR_RESET,
+                                            dpdk_eth_event_callback, NULL);
+        if (ret != 0) {
+            VLOG_ERR("Ethernet device callback register error: %s",
+                     rte_strerror(-ret));
+        }
+
         ovsthread_once_done(&once);
     }
 
@@ -4180,13 +4223,20 @@  netdev_dpdk_reconfigure(struct netdev *netdev)
         && dev->rxq_size == dev->requested_rxq_size
         && dev->txq_size == dev->requested_txq_size
         && dev->socket_id == dev->requested_socket_id
-        && dev->started) {
+        && dev->started && !dev->reset_needed) {
         /* Reconfiguration is unnecessary */
 
         goto out;
     }
 
-    rte_eth_dev_stop(dev->port_id);
+    if (dev->reset_needed) {
+        rte_eth_dev_reset(dev->port_id);
+        if_notifier_manual_report();
+        dev->reset_needed = false;
+    } else {
+        rte_eth_dev_stop(dev->port_id);
+    }
+
     dev->started = false;
 
     err = netdev_dpdk_mempool_configure(dev);