net/tap: improve link update

[dpdk.git] / drivers / net / tap / rte_eth_tap.c

diff --git a/drivers/net/tap/rte_eth_tap.c b/drivers/net/tap/rte_eth_tap.c
index 1570aef..54122fd 100644 (file)
--- a/drivers/net/tap/rte_eth_tap.c
+++ b/drivers/net/tap/rte_eth_tap.c
@@ -443,6 +443,14 @@ tap_ioctl(struct pmd_internals *pmd, unsigned long request,
         * If there is a remote netdevice, apply ioctl on it, then apply it on
         * the tap netdevice.
         */
+       if (request == SIOCGIFFLAGS && !set) {
+               /*
+                * Special case for getting flags. If set is given,
+                * then return the flags from the remote netdevice only.
+                * Otherwise return the flags from the tap netdevice.
+                */
+               remote = 0;
+       }
 apply:
        if (remote)
                snprintf(ifr->ifr_name, IFNAMSIZ, "%s", pmd->remote_iface);
@@ -458,6 +466,10 @@ apply:
                else
                        ifr->ifr_flags &= ~req_flags;
                break;
+       case SIOCGIFFLAGS:
+               if (remote && set)
+                       remote = 0; /* don't loop */
+               break;
        case SIOCGIFHWADDR:
                /* Set remote MAC on the tap netdevice */
                if (!remote && pmd->remote_if_index) {
@@ -674,9 +686,25 @@ tap_tx_queue_release(void *queue)
 }
 
 static int
-tap_link_update(struct rte_eth_dev *dev __rte_unused,
-               int wait_to_complete __rte_unused)
+tap_link_update(struct rte_eth_dev *dev, int wait_to_complete __rte_unused)
 {
+       struct rte_eth_link *dev_link = &dev->data->dev_link;
+       struct pmd_internals *pmd = dev->data->dev_private;
+       struct ifreq ifr = { .ifr_flags = 0 };
+
+       if (pmd->remote_if_index) {
+               tap_ioctl(pmd, SIOCGIFFLAGS, &ifr, 1);
+               if (!(ifr.ifr_flags & IFF_UP) ||
+                   !(ifr.ifr_flags & IFF_RUNNING)) {
+                       dev_link->link_status = ETH_LINK_DOWN;
+                       return 0;
+               }
+       }
+       tap_ioctl(pmd, SIOCGIFFLAGS, &ifr, 0);
+       dev_link->link_status =
+               ((ifr.ifr_flags & IFF_UP) && (ifr.ifr_flags & IFF_RUNNING) ?
+                ETH_LINK_UP :
+                ETH_LINK_DOWN);
        return 0;
 }