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Release 4.14 net/8021q/vlan_core.c

Directory: net/8021q
// SPDX-License-Identifier: GPL-2.0
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/if_vlan.h>
#include <linux/netpoll.h>
#include <linux/export.h>
#include "vlan.h"


bool vlan_do_receive(struct sk_buff **skbp) { struct sk_buff *skb = *skbp; __be16 vlan_proto = skb->vlan_proto; u16 vlan_id = skb_vlan_tag_get_id(skb); struct net_device *vlan_dev; struct vlan_pcpu_stats *rx_stats; vlan_dev = vlan_find_dev(skb->dev, vlan_proto, vlan_id); if (!vlan_dev) return false; skb = *skbp = skb_share_check(skb, GFP_ATOMIC); if (unlikely(!skb)) return false; if (unlikely(!(vlan_dev->flags & IFF_UP))) { kfree_skb(skb); *skbp = NULL; return false; } skb->dev = vlan_dev; if (unlikely(skb->pkt_type == PACKET_OTHERHOST)) { /* Our lower layer thinks this is not local, let's make sure. * This allows the VLAN to have a different MAC than the * underlying device, and still route correctly. */ if (ether_addr_equal_64bits(eth_hdr(skb)->h_dest, vlan_dev->dev_addr)) skb->pkt_type = PACKET_HOST; } if (!(vlan_dev_priv(vlan_dev)->flags & VLAN_FLAG_REORDER_HDR) && !netif_is_macvlan_port(vlan_dev) && !netif_is_bridge_port(vlan_dev)) { unsigned int offset = skb->data - skb_mac_header(skb); /* * vlan_insert_tag expect skb->data pointing to mac header. * So change skb->data before calling it and change back to * original position later */ skb_push(skb, offset); skb = *skbp = vlan_insert_tag(skb, skb->vlan_proto, skb->vlan_tci); if (!skb) return false; skb_pull(skb, offset + VLAN_HLEN); skb_reset_mac_len(skb); } skb->priority = vlan_get_ingress_priority(vlan_dev, skb->vlan_tci); skb->vlan_tci = 0; rx_stats = this_cpu_ptr(vlan_dev_priv(vlan_dev)->vlan_pcpu_stats); u64_stats_update_begin(&rx_stats->syncp); rx_stats->rx_packets++; rx_stats->rx_bytes += skb->len; if (skb->pkt_type == PACKET_MULTICAST) rx_stats->rx_multicast++; u64_stats_update_end(&rx_stats->syncp); return true; }

Contributors

PersonTokensPropCommitsCommitProp
Jiri Pirko11134.26%419.05%
Patrick McHardy7723.77%523.81%
Jesse Gross4513.89%14.76%
Eric Dumazet309.26%419.05%
Vishakha Narvekar298.95%14.76%
Vlad Yasevich123.70%14.76%
Pedro Garcia92.78%14.76%
Herbert Xu61.85%14.76%
Ding Tianhong41.23%29.52%
Andy Gospodarek10.31%14.76%
Total324100.00%21100.00%

/* Must be invoked with rcu_read_lock. */
struct net_device *__vlan_find_dev_deep_rcu(struct net_device *dev, __be16 vlan_proto, u16 vlan_id) { struct vlan_info *vlan_info = rcu_dereference(dev->vlan_info); if (vlan_info) { return vlan_group_get_device(&vlan_info->grp, vlan_proto, vlan_id); } else { /* * Lower devices of master uppers (bonding, team) do not have * grp assigned to themselves. Grp is assigned to upper device * instead. */ struct net_device *upper_dev; upper_dev = netdev_master_upper_dev_get_rcu(dev); if (upper_dev) return __vlan_find_dev_deep_rcu(upper_dev, vlan_proto, vlan_id); } return NULL; }

Contributors

PersonTokensPropCommitsCommitProp
Jiri Pirko7389.02%360.00%
Patrick McHardy78.54%120.00%
Ding Tianhong22.44%120.00%
Total82100.00%5100.00%

EXPORT_SYMBOL(__vlan_find_dev_deep_rcu);
struct net_device *vlan_dev_real_dev(const struct net_device *dev) { struct net_device *ret = vlan_dev_priv(dev)->real_dev; while (is_vlan_dev(ret)) ret = vlan_dev_priv(ret)->real_dev; return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Nikolay Aleksandrov2454.55%133.33%
Patrick McHardy1943.18%133.33%
Jiri Pirko12.27%133.33%
Total44100.00%3100.00%

EXPORT_SYMBOL(vlan_dev_real_dev);
u16 vlan_dev_vlan_id(const struct net_device *dev) { return vlan_dev_priv(dev)->vlan_id; }

Contributors

PersonTokensPropCommitsCommitProp
Patrick McHardy1894.74%150.00%
Jiri Pirko15.26%150.00%
Total19100.00%2100.00%

EXPORT_SYMBOL(vlan_dev_vlan_id);
__be16 vlan_dev_vlan_proto(const struct net_device *dev) { return vlan_dev_priv(dev)->vlan_proto; }

Contributors

PersonTokensPropCommitsCommitProp
Ding Tianhong19100.00%1100.00%
Total19100.00%1100.00%

EXPORT_SYMBOL(vlan_dev_vlan_proto); /* * vlan info and vid list */
static void vlan_group_free(struct vlan_group *grp) { int i, j; for (i = 0; i < VLAN_PROTO_NUM; i++) for (j = 0; j < VLAN_GROUP_ARRAY_SPLIT_PARTS; j++) kfree(grp->vlan_devices_arrays[i][j]); }

Contributors

PersonTokensPropCommitsCommitProp
Jiri Pirko3665.45%266.67%
Patrick McHardy1934.55%133.33%
Total55100.00%3100.00%


static void vlan_info_free(struct vlan_info *vlan_info) { vlan_group_free(&vlan_info->grp); kfree(vlan_info); }

Contributors

PersonTokensPropCommitsCommitProp
Jiri Pirko24100.00%1100.00%
Total24100.00%1100.00%


static void vlan_info_rcu_free(struct rcu_head *rcu) { vlan_info_free(container_of(rcu, struct vlan_info, rcu)); }

Contributors

PersonTokensPropCommitsCommitProp
Jiri Pirko24100.00%1100.00%
Total24100.00%1100.00%


static struct vlan_info *vlan_info_alloc(struct net_device *dev) { struct vlan_info *vlan_info; vlan_info = kzalloc(sizeof(struct vlan_info), GFP_KERNEL); if (!vlan_info) return NULL; vlan_info->real_dev = dev; INIT_LIST_HEAD(&vlan_info->vid_list); return vlan_info; }

Contributors

PersonTokensPropCommitsCommitProp
Jiri Pirko56100.00%2100.00%
Total56100.00%2100.00%

struct vlan_vid_info { struct list_head list; __be16 proto; u16 vid; int refcount; };
static bool vlan_hw_filter_capable(const struct net_device *dev, const struct vlan_vid_info *vid_info) { if (vid_info->proto == htons(ETH_P_8021Q) && dev->features & NETIF_F_HW_VLAN_CTAG_FILTER) return true; if (vid_info->proto == htons(ETH_P_8021AD) && dev->features & NETIF_F_HW_VLAN_STAG_FILTER) return true; return false; }

Contributors

PersonTokensPropCommitsCommitProp
Patrick McHardy61100.00%1100.00%
Total61100.00%1100.00%


static struct vlan_vid_info *vlan_vid_info_get(struct vlan_info *vlan_info, __be16 proto, u16 vid) { struct vlan_vid_info *vid_info; list_for_each_entry(vid_info, &vlan_info->vid_list, list) { if (vid_info->proto == proto && vid_info->vid == vid) return vid_info; } return NULL; }

Contributors

PersonTokensPropCommitsCommitProp
Jiri Pirko4481.48%150.00%
Patrick McHardy1018.52%150.00%
Total54100.00%2100.00%


static struct vlan_vid_info *vlan_vid_info_alloc(__be16 proto, u16 vid) { struct vlan_vid_info *vid_info; vid_info = kzalloc(sizeof(struct vlan_vid_info), GFP_KERNEL); if (!vid_info) return NULL; vid_info->proto = proto; vid_info->vid = vid; return vid_info; }

Contributors

PersonTokensPropCommitsCommitProp
Jiri Pirko4581.82%150.00%
Patrick McHardy1018.18%150.00%
Total55100.00%2100.00%


static int __vlan_vid_add(struct vlan_info *vlan_info, __be16 proto, u16 vid, struct vlan_vid_info **pvid_info) { struct net_device *dev = vlan_info->real_dev; const struct net_device_ops *ops = dev->netdev_ops; struct vlan_vid_info *vid_info; int err; vid_info = vlan_vid_info_alloc(proto, vid); if (!vid_info) return -ENOMEM; if (vlan_hw_filter_capable(dev, vid_info)) { if (netif_device_present(dev)) err = ops->ndo_vlan_rx_add_vid(dev, proto, vid); else err = -ENODEV; if (err) { kfree(vid_info); return err; } } list_add(&vid_info->list, &vlan_info->vid_list); vlan_info->nr_vids++; *pvid_info = vid_info; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Jiri Pirko11982.07%240.00%
Patrick McHardy138.97%240.00%
Padmanabh Ratnakar138.97%120.00%
Total145100.00%5100.00%


int vlan_vid_add(struct net_device *dev, __be16 proto, u16 vid) { struct vlan_info *vlan_info; struct vlan_vid_info *vid_info; bool vlan_info_created = false; int err; ASSERT_RTNL(); vlan_info = rtnl_dereference(dev->vlan_info); if (!vlan_info) { vlan_info = vlan_info_alloc(dev); if (!vlan_info) return -ENOMEM; vlan_info_created = true; } vid_info = vlan_vid_info_get(vlan_info, proto, vid); if (!vid_info) { err = __vlan_vid_add(vlan_info, proto, vid, &vid_info); if (err) goto out_free_vlan_info; } vid_info->refcount++; if (vlan_info_created) rcu_assign_pointer(dev->vlan_info, vlan_info); return 0; out_free_vlan_info: if (vlan_info_created) kfree(vlan_info); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Jiri Pirko13994.56%266.67%
Patrick McHardy85.44%133.33%
Total147100.00%3100.00%

EXPORT_SYMBOL(vlan_vid_add);
static void __vlan_vid_del(struct vlan_info *vlan_info, struct vlan_vid_info *vid_info) { struct net_device *dev = vlan_info->real_dev; const struct net_device_ops *ops = dev->netdev_ops; __be16 proto = vid_info->proto; u16 vid = vid_info->vid; int err; if (vlan_hw_filter_capable(dev, vid_info)) { if (netif_device_present(dev)) err = ops->ndo_vlan_rx_kill_vid(dev, proto, vid); else err = -ENODEV; if (err) { pr_warn("failed to kill vid %04x/%d for device %s\n", proto, vid, dev->name); } } list_del(&vid_info->list); kfree(vid_info); vlan_info->nr_vids--; }

Contributors

PersonTokensPropCommitsCommitProp
Jiri Pirko9575.40%240.00%
Patrick McHardy1814.29%240.00%
Padmanabh Ratnakar1310.32%120.00%
Total126100.00%5100.00%


void vlan_vid_del(struct net_device *dev, __be16 proto, u16 vid) { struct vlan_info *vlan_info; struct vlan_vid_info *vid_info; ASSERT_RTNL(); vlan_info = rtnl_dereference(dev->vlan_info); if (!vlan_info) return; vid_info = vlan_vid_info_get(vlan_info, proto, vid); if (!vid_info) return; vid_info->refcount--; if (vid_info->refcount == 0) { __vlan_vid_del(vlan_info, vid_info); if (vlan_info->nr_vids == 0) { RCU_INIT_POINTER(dev->vlan_info, NULL); call_rcu(&vlan_info->rcu, vlan_info_rcu_free); } } }

Contributors

PersonTokensPropCommitsCommitProp
Jiri Pirko10694.64%266.67%
Patrick McHardy65.36%133.33%
Total112100.00%3100.00%

EXPORT_SYMBOL(vlan_vid_del);
int vlan_vids_add_by_dev(struct net_device *dev, const struct net_device *by_dev) { struct vlan_vid_info *vid_info; struct vlan_info *vlan_info; int err; ASSERT_RTNL(); vlan_info = rtnl_dereference(by_dev->vlan_info); if (!vlan_info) return 0; list_for_each_entry(vid_info, &vlan_info->vid_list, list) { err = vlan_vid_add(dev, vid_info->proto, vid_info->vid); if (err) goto unwind; } return 0; unwind: list_for_each_entry_continue_reverse(vid_info, &vlan_info->vid_list, list) { vlan_vid_del(dev, vid_info->proto, vid_info->vid); } return err; }

Contributors

PersonTokensPropCommitsCommitProp
Jiri Pirko8878.57%133.33%
Dan Carpenter1614.29%133.33%
Patrick McHardy87.14%133.33%
Total112100.00%3100.00%

EXPORT_SYMBOL(vlan_vids_add_by_dev);
void vlan_vids_del_by_dev(struct net_device *dev, const struct net_device *by_dev) { struct vlan_vid_info *vid_info; struct vlan_info *vlan_info; ASSERT_RTNL(); vlan_info = rtnl_dereference(by_dev->vlan_info); if (!vlan_info) return; list_for_each_entry(vid_info, &vlan_info->vid_list, list) vlan_vid_del(dev, vid_info->proto, vid_info->vid); }

Contributors

PersonTokensPropCommitsCommitProp
Jiri Pirko4670.77%133.33%
Dan Carpenter1523.08%133.33%
Patrick McHardy46.15%133.33%
Total65100.00%3100.00%

EXPORT_SYMBOL(vlan_vids_del_by_dev);
bool vlan_uses_dev(const struct net_device *dev) { struct vlan_info *vlan_info; ASSERT_RTNL(); vlan_info = rtnl_dereference(dev->vlan_info); if (!vlan_info) return false; return vlan_info->grp.nr_vlan_devs ? true : false; }

Contributors

PersonTokensPropCommitsCommitProp
Jiri Pirko47100.00%2100.00%
Total47100.00%2100.00%

EXPORT_SYMBOL(vlan_uses_dev);

Overall Contributors

PersonTokensPropCommitsCommitProp
Jiri Pirko110066.47%1126.83%
Patrick McHardy30218.25%921.95%
Jesse Gross452.72%12.44%
Dan Carpenter311.87%12.44%
Ding Tianhong311.87%49.76%
Eric Dumazet301.81%49.76%
Vishakha Narvekar291.75%12.44%
Padmanabh Ratnakar261.57%12.44%
Nikolay Aleksandrov241.45%12.44%
Vlad Yasevich120.73%12.44%
Herbert Xu90.54%24.88%
Pedro Garcia90.54%12.44%
Paul Gortmaker30.18%12.44%
Ben Greear20.12%12.44%
Andy Gospodarek10.06%12.44%
Greg Kroah-Hartman10.06%12.44%
Total1655100.00%41100.00%
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