[dpdk-dev] [PATCH 6/6] net/tap: implement link up and down callbacks

[Pascal Mazon]

Signed-off-by: Pascal Mazon <pascal.ma...@6wind.com>
---
 drivers/net/tap/rte_eth_tap.c | 59 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 59 insertions(+)

diff --git a/drivers/net/tap/rte_eth_tap.c b/drivers/net/tap/rte_eth_tap.c
index 734e3a579219..9b6bbff5fd81 100644
--- a/drivers/net/tap/rte_eth_tap.c
+++ b/drivers/net/tap/rte_eth_tap.c
@@ -405,6 +405,63 @@ tap_link_update(struct rte_eth_dev *dev __rte_unused,
        return 0;
 }
 
+static int tap_link_set(struct pmd_internals *pmd, int state)
+{
+       struct ifreq ifr;
+       int err, s;
+
+       /*
+        * An AF_INET/DGRAM socket is needed for
+        * SIOCGIFFLAGS/SIOCSIFFLAGS, using fd won't work.
+        */
+       s = socket(AF_INET, SOCK_DGRAM, 0);
+       if (s < 0) {
+               RTE_LOG(ERR, PMD,
+                       "Unable to get a socket to set flags: %s\n",
+                       strerror(errno));
+               return -1;
+       }
+       memset(&ifr, 0, sizeof(ifr));
+       strncpy(ifr.ifr_name, pmd->name, IFNAMSIZ);
+       err = ioctl(s, SIOCGIFFLAGS, &ifr);
+       if (err < 0) {
+               RTE_LOG(ERR, PMD, "Unable to get tap netdevice flags: %s\n",
+                       strerror(errno));
+               close(s);
+               return -1;
+       }
+       if (state == ETH_LINK_UP)
+               ifr.ifr_flags |= IFF_UP | IFF_NOARP;
+       else
+               ifr.ifr_flags &= ~(IFF_UP | IFF_NOARP);
+       err = ioctl(s, SIOCSIFFLAGS, &ifr);
+       if (err < 0) {
+               RTE_LOG(ERR, PMD, "Unable to set flags %s: %s\n",
+                       state == ETH_LINK_UP ? "UP" : "DOWN", strerror(errno));
+               close(s);
+               return -1;
+       }
+       close(s);
+
+       return 0;
+}
+
+static int
+tap_link_set_down(struct rte_eth_dev *dev)
+{
+       struct pmd_internals *pmd = dev->data->dev_private;
+
+       return tap_link_set(pmd, ETH_LINK_DOWN);
+}
+
+static int
+tap_link_set_up(struct rte_eth_dev *dev)
+{
+       struct pmd_internals *pmd = dev->data->dev_private;
+
+       return tap_link_set(pmd, ETH_LINK_UP);
+}
+
 static int
 tap_setup_queue(struct rte_eth_dev *dev,
                struct pmd_internals *internals,
@@ -532,6 +589,8 @@ static const struct eth_dev_ops ops = {
        .rx_queue_release       = tap_rx_queue_release,
        .tx_queue_release       = tap_tx_queue_release,
        .link_update            = tap_link_update,
+       .dev_set_link_up        = tap_link_set_up,
+       .dev_set_link_down      = tap_link_set_down,
        .stats_get              = tap_stats_get,
        .stats_reset            = tap_stats_reset,
 };
-- 
2.8.0.rc0