From 0a1275ca5128b84ffffc149960969ed351ae00eb Mon Sep 17 00:00:00 2001 From: Vitaly Kuznetsov Date: Fri, 13 May 2016 13:55:23 +0200 Subject: hv_netvsc: get rid of struct net_device pointer in struct netvsc_device Simplify netvsvc pointer graph by getting rid of the redundant ndev pointer. We can always get a pointer to struct net_device from somewhere else. Signed-off-by: Vitaly Kuznetsov Signed-off-by: David S. Miller --- drivers/net/hyperv/netvsc_drv.c | 91 ++++++++++++++++++++++++----------------- 1 file changed, 54 insertions(+), 37 deletions(-) (limited to 'drivers/net/hyperv/netvsc_drv.c') diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c index a33a1c92d489..7325d693fc4a 100644 --- a/drivers/net/hyperv/netvsc_drv.c +++ b/drivers/net/hyperv/netvsc_drv.c @@ -67,18 +67,19 @@ static void do_set_multicast(struct work_struct *w) { struct net_device_context *ndevctx = container_of(w, struct net_device_context, work); - struct netvsc_device *nvdev; + struct hv_device *device_obj = ndevctx->device_ctx; + struct net_device *ndev = hv_get_drvdata(device_obj); + struct netvsc_device *nvdev = ndevctx->nvdev; struct rndis_device *rdev; - nvdev = ndevctx->nvdev; - if (nvdev == NULL || nvdev->ndev == NULL) + if (!nvdev) return; rdev = nvdev->extension; if (rdev == NULL) return; - if (nvdev->ndev->flags & IFF_PROMISC) + if (ndev->flags & IFF_PROMISC) rndis_filter_set_packet_filter(rdev, NDIS_PACKET_TYPE_PROMISCUOUS); else @@ -1050,23 +1051,22 @@ static const struct net_device_ops device_ops = { */ static void netvsc_link_change(struct work_struct *w) { - struct net_device_context *ndev_ctx; - struct net_device *net; + struct net_device_context *ndev_ctx = + container_of(w, struct net_device_context, dwork.work); + struct hv_device *device_obj = ndev_ctx->device_ctx; + struct net_device *net = hv_get_drvdata(device_obj); struct netvsc_device *net_device; struct rndis_device *rdev; struct netvsc_reconfig *event = NULL; bool notify = false, reschedule = false; unsigned long flags, next_reconfig, delay; - ndev_ctx = container_of(w, struct net_device_context, dwork.work); - rtnl_lock(); if (ndev_ctx->start_remove) goto out_unlock; net_device = ndev_ctx->nvdev; rdev = net_device->extension; - net = net_device->ndev; next_reconfig = ndev_ctx->last_reconfig + LINKCHANGE_INT; if (time_is_after_jiffies(next_reconfig)) { @@ -1167,10 +1167,9 @@ static void netvsc_notify_peers(struct work_struct *wrk) atomic_dec(&gwrk->netvsc_dev->vf_use_cnt); } -static struct netvsc_device *get_netvsc_device(char *mac) +static struct net_device *get_netvsc_net_device(char *mac) { - struct net_device *dev; - struct net_device_context *netvsc_ctx = NULL; + struct net_device *dev, *found = NULL; int rtnl_locked; rtnl_locked = rtnl_trylock(); @@ -1179,21 +1178,20 @@ static struct netvsc_device *get_netvsc_device(char *mac) if (memcmp(dev->dev_addr, mac, ETH_ALEN) == 0) { if (dev->netdev_ops != &device_ops) continue; - netvsc_ctx = netdev_priv(dev); + found = dev; break; } } if (rtnl_locked) rtnl_unlock(); - if (netvsc_ctx == NULL) - return NULL; - - return netvsc_ctx->nvdev; + return found; } static int netvsc_register_vf(struct net_device *vf_netdev) { + struct net_device *ndev; + struct net_device_context *net_device_ctx; struct netvsc_device *netvsc_dev; const struct ethtool_ops *eth_ops = vf_netdev->ethtool_ops; @@ -1205,11 +1203,16 @@ static int netvsc_register_vf(struct net_device *vf_netdev) * associate with the VF interface. If we don't find a matching * synthetic interface, move on. */ - netvsc_dev = get_netvsc_device(vf_netdev->dev_addr); + ndev = get_netvsc_net_device(vf_netdev->dev_addr); + if (!ndev) + return NOTIFY_DONE; + + net_device_ctx = netdev_priv(ndev); + netvsc_dev = net_device_ctx->nvdev; if (netvsc_dev == NULL) return NOTIFY_DONE; - netdev_info(netvsc_dev->ndev, "VF registering: %s\n", vf_netdev->name); + netdev_info(ndev, "VF registering: %s\n", vf_netdev->name); /* * Take a reference on the module. */ @@ -1221,6 +1224,7 @@ static int netvsc_register_vf(struct net_device *vf_netdev) static int netvsc_vf_up(struct net_device *vf_netdev) { + struct net_device *ndev; struct netvsc_device *netvsc_dev; const struct ethtool_ops *eth_ops = vf_netdev->ethtool_ops; struct net_device_context *net_device_ctx; @@ -1228,13 +1232,17 @@ static int netvsc_vf_up(struct net_device *vf_netdev) if (eth_ops == ðtool_ops) return NOTIFY_DONE; - netvsc_dev = get_netvsc_device(vf_netdev->dev_addr); + ndev = get_netvsc_net_device(vf_netdev->dev_addr); + if (!ndev) + return NOTIFY_DONE; + + net_device_ctx = netdev_priv(ndev); + netvsc_dev = net_device_ctx->nvdev; if ((netvsc_dev == NULL) || (netvsc_dev->vf_netdev == NULL)) return NOTIFY_DONE; - netdev_info(netvsc_dev->ndev, "VF up: %s\n", vf_netdev->name); - net_device_ctx = netdev_priv(netvsc_dev->ndev); + netdev_info(ndev, "VF up: %s\n", vf_netdev->name); netvsc_dev->vf_inject = true; /* @@ -1245,11 +1253,10 @@ static int netvsc_vf_up(struct net_device *vf_netdev) /* * notify the host to switch the data path. */ - netvsc_switch_datapath(netvsc_dev, true); - netdev_info(netvsc_dev->ndev, "Data path switched to VF: %s\n", - vf_netdev->name); + netvsc_switch_datapath(ndev, true); + netdev_info(ndev, "Data path switched to VF: %s\n", vf_netdev->name); - netif_carrier_off(netvsc_dev->ndev); + netif_carrier_off(ndev); /* * Now notify peers. We are scheduling work to @@ -1267,6 +1274,7 @@ static int netvsc_vf_up(struct net_device *vf_netdev) static int netvsc_vf_down(struct net_device *vf_netdev) { + struct net_device *ndev; struct netvsc_device *netvsc_dev; struct net_device_context *net_device_ctx; const struct ethtool_ops *eth_ops = vf_netdev->ethtool_ops; @@ -1274,13 +1282,17 @@ static int netvsc_vf_down(struct net_device *vf_netdev) if (eth_ops == ðtool_ops) return NOTIFY_DONE; - netvsc_dev = get_netvsc_device(vf_netdev->dev_addr); + ndev = get_netvsc_net_device(vf_netdev->dev_addr); + if (!ndev) + return NOTIFY_DONE; + + net_device_ctx = netdev_priv(ndev); + netvsc_dev = net_device_ctx->nvdev; if ((netvsc_dev == NULL) || (netvsc_dev->vf_netdev == NULL)) return NOTIFY_DONE; - netdev_info(netvsc_dev->ndev, "VF down: %s\n", vf_netdev->name); - net_device_ctx = netdev_priv(netvsc_dev->ndev); + netdev_info(ndev, "VF down: %s\n", vf_netdev->name); netvsc_dev->vf_inject = false; /* * Wait for currently active users to @@ -1289,16 +1301,15 @@ static int netvsc_vf_down(struct net_device *vf_netdev) while (atomic_read(&netvsc_dev->vf_use_cnt) != 0) udelay(50); - netvsc_switch_datapath(netvsc_dev, false); - netdev_info(netvsc_dev->ndev, "Data path switched from VF: %s\n", - vf_netdev->name); + netvsc_switch_datapath(ndev, false); + netdev_info(ndev, "Data path switched from VF: %s\n", vf_netdev->name); rndis_filter_close(net_device_ctx->device_ctx); - netif_carrier_on(netvsc_dev->ndev); + netif_carrier_on(ndev); /* * Notify peers. */ atomic_inc(&netvsc_dev->vf_use_cnt); - net_device_ctx->gwrk.netdev = netvsc_dev->ndev; + net_device_ctx->gwrk.netdev = ndev; net_device_ctx->gwrk.netvsc_dev = netvsc_dev; schedule_work(&net_device_ctx->gwrk.dwrk); @@ -1308,17 +1319,23 @@ static int netvsc_vf_down(struct net_device *vf_netdev) static int netvsc_unregister_vf(struct net_device *vf_netdev) { + struct net_device *ndev; struct netvsc_device *netvsc_dev; const struct ethtool_ops *eth_ops = vf_netdev->ethtool_ops; + struct net_device_context *net_device_ctx; if (eth_ops == ðtool_ops) return NOTIFY_DONE; - netvsc_dev = get_netvsc_device(vf_netdev->dev_addr); + ndev = get_netvsc_net_device(vf_netdev->dev_addr); + if (!ndev) + return NOTIFY_DONE; + + net_device_ctx = netdev_priv(ndev); + netvsc_dev = net_device_ctx->nvdev; if (netvsc_dev == NULL) return NOTIFY_DONE; - netdev_info(netvsc_dev->ndev, "VF unregistering: %s\n", - vf_netdev->name); + netdev_info(ndev, "VF unregistering: %s\n", vf_netdev->name); netvsc_dev->vf_netdev = NULL; module_put(THIS_MODULE); -- cgit v1.2.3