[PATCH v2 net-next 15/19] ionic: Add netdev-event handling

[Shannon Nelson]

When the netdev gets a new name from userland, pass that name
down to the NIC for internal tracking.

Signed-off-by: Shannon Nelson <snel...@pensando.io>
---
 drivers/net/ethernet/pensando/ionic/ionic.h   |  2 +
 .../net/ethernet/pensando/ionic/ionic_lif.c   | 65 +++++++++++++++++++
 2 files changed, 67 insertions(+)

diff --git a/drivers/net/ethernet/pensando/ionic/ionic.h 
b/drivers/net/ethernet/pensando/ionic/ionic.h
index d7eee79b2a10..9b720187b549 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic.h
+++ b/drivers/net/ethernet/pensando/ionic/ionic.h
@@ -42,6 +42,8 @@ struct ionic {
        DECLARE_BITMAP(lifbits, IONIC_LIFS_MAX);
        unsigned int nintrs;
        DECLARE_BITMAP(intrs, INTR_CTRL_REGS_MAX);
+       struct work_struct nb_work;
+       struct notifier_block nb;
 };
 
 struct ionic_admin_ctx {
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.c 
b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
index b47ed322496f..76974c61c306 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_lif.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
@@ -1956,10 +1956,69 @@ int ionic_lifs_init(struct ionic *ionic)
        return 0;
 }
 
+static void ionic_lif_notify_work(struct work_struct *ws)
+{
+}
+
+static void ionic_lif_set_netdev_info(struct lif *lif)
+{
+       struct ionic_admin_ctx ctx = {
+               .work = COMPLETION_INITIALIZER_ONSTACK(ctx.work),
+               .cmd.lif_setattr = {
+                       .opcode = CMD_OPCODE_LIF_SETATTR,
+                       .index = cpu_to_le16(lif->index),
+                       .attr = IONIC_LIF_ATTR_NAME,
+               },
+       };
+
+       strlcpy(ctx.cmd.lif_setattr.name, lif->netdev->name,
+               sizeof(ctx.cmd.lif_setattr.name));
+
+       dev_info(lif->ionic->dev, "NETDEV_CHANGENAME %s %s\n",
+                lif->name, ctx.cmd.lif_setattr.name);
+
+       ionic_adminq_post_wait(lif, &ctx);
+}
+
+static struct lif *ionic_netdev_lif(struct net_device *netdev)
+{
+       if (!netdev || netdev->netdev_ops->ndo_start_xmit != ionic_start_xmit)
+               return NULL;
+
+       return netdev_priv(netdev);
+}
+
+static int ionic_lif_notify(struct notifier_block *nb,
+                           unsigned long event, void *info)
+{
+       struct net_device *ndev = netdev_notifier_info_to_dev(info);
+       struct ionic *ionic = container_of(nb, struct ionic, nb);
+       struct lif *lif = ionic_netdev_lif(ndev);
+
+       if (!lif || lif->ionic != ionic)
+               return NOTIFY_DONE;
+
+       switch (event) {
+       case NETDEV_CHANGENAME:
+               ionic_lif_set_netdev_info(lif);
+               break;
+       }
+
+       return NOTIFY_DONE;
+}
+
 int ionic_lifs_register(struct ionic *ionic)
 {
        int err;
 
+       INIT_WORK(&ionic->nb_work, ionic_lif_notify_work);
+
+       ionic->nb.notifier_call = ionic_lif_notify;
+
+       err = register_netdevice_notifier(&ionic->nb);
+       if (err)
+               ionic->nb.notifier_call = NULL;
+
        /* only register LIF0 for now */
        err = register_netdev(ionic->master_lif->netdev);
        if (err) {
@@ -1975,6 +2034,12 @@ int ionic_lifs_register(struct ionic *ionic)
 
 void ionic_lifs_unregister(struct ionic *ionic)
 {
+       if (ionic->nb.notifier_call) {
+               unregister_netdevice_notifier(&ionic->nb);
+               cancel_work_sync(&ionic->nb_work);
+               ionic->nb.notifier_call = NULL;
+       }
+
        /* There is only one lif ever registered in the
         * current model, so don't bother searching the
         * ionic->lif for candidates to unregister
-- 
2.17.1