cregit-Linux how code gets into the kernel

Release 4.11 net/openvswitch/vport-netdev.c

Directory: net/openvswitch
/*
 * Copyright (c) 2007-2012 Nicira, Inc.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA
 */


#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/if_arp.h>
#include <linux/if_bridge.h>
#include <linux/if_vlan.h>
#include <linux/kernel.h>
#include <linux/llc.h>
#include <linux/rtnetlink.h>
#include <linux/skbuff.h>
#include <linux/openvswitch.h>
#include <linux/export.h>

#include <net/ip_tunnels.h>
#include <net/rtnetlink.h>

#include "datapath.h"
#include "vport.h"
#include "vport-internal_dev.h"
#include "vport-netdev.h"


static struct vport_ops ovs_netdev_vport_ops;

/* Must be called with rcu_read_lock. */

static void netdev_port_receive(struct sk_buff *skb) { struct vport *vport; vport = ovs_netdev_get_vport(skb->dev); if (unlikely(!vport)) goto error; if (unlikely(skb_warn_if_lro(skb))) goto error; /* Make our own copy of the packet. Otherwise we will mangle the * packet for anyone who came before us (e.g. tcpdump via AF_PACKET). */ skb = skb_share_check(skb, GFP_ATOMIC); if (unlikely(!skb)) return; if (skb->dev->type == ARPHRD_ETHER) { skb_push(skb, ETH_HLEN); skb_postpush_rcsum(skb, skb->data, ETH_HLEN); } ovs_vport_receive(vport, skb, skb_tunnel_info(skb)); return; error: kfree_skb(skb); }

Contributors

PersonTokensPropCommitsCommitProp
Jesse Gross7563.56%222.22%
Pravin B Shelar2521.19%333.33%
Jiri Benc1210.17%111.11%
Thomas Graf43.39%111.11%
Américo Wang10.85%111.11%
Daniel Borkmann10.85%111.11%
Total118100.00%9100.00%

/* Called with rcu_read_lock and bottom-halves disabled. */
static rx_handler_result_t netdev_frame_hook(struct sk_buff **pskb) { struct sk_buff *skb = *pskb; if (unlikely(skb->pkt_type == PACKET_LOOPBACK)) return RX_HANDLER_PASS; netdev_port_receive(skb); return RX_HANDLER_CONSUMED; }

Contributors

PersonTokensPropCommitsCommitProp
Jesse Gross42100.00%1100.00%
Total42100.00%1100.00%


static struct net_device *get_dpdev(const struct datapath *dp) { struct vport *local; local = ovs_vport_ovsl(dp, OVSP_LOCAL); BUG_ON(!local); return local->dev; }

Contributors

PersonTokensPropCommitsCommitProp
Jiri Pirko3897.44%150.00%
Thomas Graf12.56%150.00%
Total39100.00%2100.00%


struct vport *ovs_netdev_link(struct vport *vport, const char *name) { int err; vport->dev = dev_get_by_name(ovs_dp_get_net(vport->dp), name); if (!vport->dev) { err = -ENODEV; goto error_free_vport; } if (vport->dev->flags & IFF_LOOPBACK || (vport->dev->type != ARPHRD_ETHER && vport->dev->type != ARPHRD_NONE) || ovs_is_internal_dev(vport->dev)) { err = -EINVAL; goto error_put; } rtnl_lock(); err = netdev_master_upper_dev_link(vport->dev, get_dpdev(vport->dp), NULL, NULL); if (err) goto error_unlock; err = netdev_rx_handler_register(vport->dev, netdev_frame_hook, vport); if (err) goto error_master_upper_dev_unlink; dev_disable_lro(vport->dev); dev_set_promiscuity(vport->dev, 1); vport->dev->priv_flags |= IFF_OVS_DATAPATH; rtnl_unlock(); return vport; error_master_upper_dev_unlink: netdev_upper_dev_unlink(vport->dev, get_dpdev(vport->dp)); error_unlock: rtnl_unlock(); error_put: dev_put(vport->dev); error_free_vport: ovs_vport_free(vport); return ERR_PTR(err); }

Contributors

PersonTokensPropCommitsCommitProp
Jesse Gross12857.92%110.00%
Jiri Pirko4219.00%330.00%
Thomas Graf188.14%220.00%
Pravin B Shelar177.69%220.00%
Jiri Benc167.24%220.00%
Total221100.00%10100.00%

EXPORT_SYMBOL_GPL(ovs_netdev_link);
static struct vport *netdev_create(const struct vport_parms *parms) { struct vport *vport; vport = ovs_vport_alloc(0, &ovs_netdev_vport_ops, parms); if (IS_ERR(vport)) return vport; return ovs_netdev_link(vport, parms->name); }

Contributors

PersonTokensPropCommitsCommitProp
Thomas Graf51100.00%2100.00%
Total51100.00%2100.00%


static void vport_netdev_free(struct rcu_head *rcu) { struct vport *vport = container_of(rcu, struct vport, rcu); if (vport->dev) dev_put(vport->dev); ovs_vport_free(vport); }

Contributors

PersonTokensPropCommitsCommitProp
Jesse Gross3170.45%125.00%
Thomas Graf1125.00%250.00%
Pravin B Shelar24.55%125.00%
Total44100.00%4100.00%


void ovs_netdev_detach_dev(struct vport *vport) { ASSERT_RTNL(); vport->dev->priv_flags &= ~IFF_OVS_DATAPATH; netdev_rx_handler_unregister(vport->dev); netdev_upper_dev_unlink(vport->dev, netdev_master_upper_dev_get(vport->dev)); dev_set_promiscuity(vport->dev, -1); }

Contributors

PersonTokensPropCommitsCommitProp
Jesse Gross3158.49%120.00%
Jiri Pirko1018.87%120.00%
Alexei Starovoitov59.43%120.00%
Thomas Graf59.43%120.00%
Pravin B Shelar23.77%120.00%
Total53100.00%5100.00%


static void netdev_destroy(struct vport *vport) { rtnl_lock(); if (vport->dev->priv_flags & IFF_OVS_DATAPATH) ovs_netdev_detach_dev(vport); rtnl_unlock(); call_rcu(&vport->rcu, vport_netdev_free); }

Contributors

PersonTokensPropCommitsCommitProp
Alexei Starovoitov2764.29%116.67%
Pravin B Shelar716.67%233.33%
Jesse Gross614.29%233.33%
Thomas Graf24.76%116.67%
Total42100.00%6100.00%


void ovs_netdev_tunnel_destroy(struct vport *vport) { rtnl_lock(); if (vport->dev->priv_flags & IFF_OVS_DATAPATH) ovs_netdev_detach_dev(vport); /* We can be invoked by both explicit vport deletion and * underlying netdev deregistration; delete the link only * if it's not already shutting down. */ if (vport->dev->reg_state == NETREG_REGISTERED) rtnl_delete_link(vport->dev); dev_put(vport->dev); vport->dev = NULL; rtnl_unlock(); call_rcu(&vport->rcu, vport_netdev_free); }

Contributors

PersonTokensPropCommitsCommitProp
Pravin B Shelar5677.78%133.33%
Paolo Abeni1318.06%133.33%
Jesse Gross34.17%133.33%
Total72100.00%3100.00%

EXPORT_SYMBOL_GPL(ovs_netdev_tunnel_destroy); /* Returns null if this device is not attached to a datapath. */
struct vport *ovs_netdev_get_vport(struct net_device *dev) { if (likely(dev->priv_flags & IFF_OVS_DATAPATH)) return (struct vport *) rcu_dereference_rtnl(dev->rx_handler_data); else return NULL; }

Contributors

PersonTokensPropCommitsCommitProp
Jesse Gross40100.00%1100.00%
Total40100.00%1100.00%

static struct vport_ops ovs_netdev_vport_ops = { .type = OVS_VPORT_TYPE_NETDEV, .create = netdev_create, .destroy = netdev_destroy, .send = dev_queue_xmit, };
int __init ovs_netdev_init(void) { return ovs_vport_ops_register(&ovs_netdev_vport_ops); }

Contributors

PersonTokensPropCommitsCommitProp
Thomas Graf15100.00%2100.00%
Total15100.00%2100.00%


void ovs_netdev_exit(void) { ovs_vport_ops_unregister(&ovs_netdev_vport_ops); }

Contributors

PersonTokensPropCommitsCommitProp
Thomas Graf13100.00%2100.00%
Total13100.00%2100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Jesse Gross42149.65%311.54%
Thomas Graf14316.86%623.08%
Pravin B Shelar11513.56%726.92%
Jiri Pirko9310.97%311.54%
Alexei Starovoitov323.77%13.85%
Jiri Benc283.30%27.69%
Paolo Abeni131.53%13.85%
Daniel Borkmann10.12%13.85%
Américo Wang10.12%13.85%
Raju Subramanian10.12%13.85%
Total848100.00%26100.00%
Directory: net/openvswitch
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