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Release 4.14 net/sched/act_vlan.c

Directory: net/sched
 * Copyright (c) 2014 Jiri Pirko <>
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.

#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/skbuff.h>
#include <linux/rtnetlink.h>
#include <linux/if_vlan.h>
#include <net/netlink.h>
#include <net/pkt_sched.h>

#include <linux/tc_act/tc_vlan.h>
#include <net/tc_act/tc_vlan.h>

static unsigned int vlan_net_id;

static struct tc_action_ops act_vlan_ops;

static int tcf_vlan(struct sk_buff *skb, const struct tc_action *a, struct tcf_result *res) { struct tcf_vlan *v = to_vlan(a); int action; int err; u16 tci; spin_lock(&v->tcf_lock); tcf_lastuse_update(&v->tcf_tm); bstats_update(&v->tcf_bstats, skb); action = v->tcf_action; /* Ensure 'data' points at mac_header prior calling vlan manipulating * functions. */ if (skb_at_tc_ingress(skb)) skb_push_rcsum(skb, skb->mac_len); switch (v->tcfv_action) { case TCA_VLAN_ACT_POP: err = skb_vlan_pop(skb); if (err) goto drop; break; case TCA_VLAN_ACT_PUSH: err = skb_vlan_push(skb, v->tcfv_push_proto, v->tcfv_push_vid | (v->tcfv_push_prio << VLAN_PRIO_SHIFT)); if (err) goto drop; break; case TCA_VLAN_ACT_MODIFY: /* No-op if no vlan tag (either hw-accel or in-payload) */ if (!skb_vlan_tagged(skb)) goto unlock; /* extract existing tag (and guarantee no hw-accel tag) */ if (skb_vlan_tag_present(skb)) { tci = skb_vlan_tag_get(skb); skb->vlan_tci = 0; } else { /* in-payload vlan tag, pop it */ err = __skb_vlan_pop(skb, &tci); if (err) goto drop; } /* replace the vid */ tci = (tci & ~VLAN_VID_MASK) | v->tcfv_push_vid; /* replace prio bits, if tcfv_push_prio specified */ if (v->tcfv_push_prio) { tci &= ~VLAN_PRIO_MASK; tci |= v->tcfv_push_prio << VLAN_PRIO_SHIFT; } /* put updated tci as hwaccel tag */ __vlan_hwaccel_put_tag(skb, v->tcfv_push_proto, tci); break; default: BUG(); } goto unlock; drop: action = TC_ACT_SHOT; v->tcf_qstats.drops++; unlock: if (skb_at_tc_ingress(skb)) skb_pull_rcsum(skb, skb->mac_len); spin_unlock(&v->tcf_lock); return action; }


Jiri Pirko14848.21%116.67%
Shmulik Ladkani14446.91%233.33%
Hadar Hen Zion82.61%116.67%
Jamal Hadi Salim41.30%116.67%
Américo Wang30.98%116.67%

static const struct nla_policy vlan_policy[TCA_VLAN_MAX + 1] = { [TCA_VLAN_PARMS] = { .len = sizeof(struct tc_vlan) }, [TCA_VLAN_PUSH_VLAN_ID] = { .type = NLA_U16 }, [TCA_VLAN_PUSH_VLAN_PROTOCOL] = { .type = NLA_U16 }, [TCA_VLAN_PUSH_VLAN_PRIORITY] = { .type = NLA_U8 }, };
static int tcf_vlan_init(struct net *net, struct nlattr *nla, struct nlattr *est, struct tc_action **a, int ovr, int bind) { struct tc_action_net *tn = net_generic(net, vlan_net_id); struct nlattr *tb[TCA_VLAN_MAX + 1]; struct tc_vlan *parm; struct tcf_vlan *v; int action; __be16 push_vid = 0; __be16 push_proto = 0; u8 push_prio = 0; bool exists = false; int ret = 0, err; if (!nla) return -EINVAL; err = nla_parse_nested(tb, TCA_VLAN_MAX, nla, vlan_policy, NULL); if (err < 0) return err; if (!tb[TCA_VLAN_PARMS]) return -EINVAL; parm = nla_data(tb[TCA_VLAN_PARMS]); exists = tcf_idr_check(tn, parm->index, a, bind); if (exists && bind) return 0; switch (parm->v_action) { case TCA_VLAN_ACT_POP: break; case TCA_VLAN_ACT_PUSH: case TCA_VLAN_ACT_MODIFY: if (!tb[TCA_VLAN_PUSH_VLAN_ID]) { if (exists) tcf_idr_release(*a, bind); return -EINVAL; } push_vid = nla_get_u16(tb[TCA_VLAN_PUSH_VLAN_ID]); if (push_vid >= VLAN_VID_MASK) { if (exists) tcf_idr_release(*a, bind); return -ERANGE; } if (tb[TCA_VLAN_PUSH_VLAN_PROTOCOL]) { push_proto = nla_get_be16(tb[TCA_VLAN_PUSH_VLAN_PROTOCOL]); switch (push_proto) { case htons(ETH_P_8021Q): case htons(ETH_P_8021AD): break; default: return -EPROTONOSUPPORT; } } else { push_proto = htons(ETH_P_8021Q); } if (tb[TCA_VLAN_PUSH_VLAN_PRIORITY]) push_prio = nla_get_u8(tb[TCA_VLAN_PUSH_VLAN_PRIORITY]); break; default: if (exists) tcf_idr_release(*a, bind); return -EINVAL; } action = parm->v_action; if (!exists) { ret = tcf_idr_create(tn, parm->index, est, a, &act_vlan_ops, bind, false); if (ret) return ret; ret = ACT_P_CREATED; } else { tcf_idr_release(*a, bind); if (!ovr) return -EEXIST; } v = to_vlan(*a); spin_lock_bh(&v->tcf_lock); v->tcfv_action = action; v->tcfv_push_vid = push_vid; v->tcfv_push_prio = push_prio; v->tcfv_push_proto = push_proto; v->tcf_action = parm->action; spin_unlock_bh(&v->tcf_lock); if (ret == ACT_P_CREATED) tcf_idr_insert(tn, *a); return ret; }


Jiri Pirko34872.65%110.00%
Jamal Hadi Salim5912.32%110.00%
Américo Wang306.26%330.00%
Hadar Hen Zion285.85%110.00%
Chris Mi71.46%110.00%
Shmulik Ladkani30.63%110.00%
Eric Dumazet20.42%110.00%
Johannes Berg20.42%110.00%

static int tcf_vlan_dump(struct sk_buff *skb, struct tc_action *a, int bind, int ref) { unsigned char *b = skb_tail_pointer(skb); struct tcf_vlan *v = to_vlan(a); struct tc_vlan opt = { .index = v->tcf_index, .refcnt = v->tcf_refcnt - ref, .bindcnt = v->tcf_bindcnt - bind, .action = v->tcf_action, .v_action = v->tcfv_action, }; struct tcf_t t; if (nla_put(skb, TCA_VLAN_PARMS, sizeof(opt), &opt)) goto nla_put_failure; if ((v->tcfv_action == TCA_VLAN_ACT_PUSH || v->tcfv_action == TCA_VLAN_ACT_MODIFY) && (nla_put_u16(skb, TCA_VLAN_PUSH_VLAN_ID, v->tcfv_push_vid) || nla_put_be16(skb, TCA_VLAN_PUSH_VLAN_PROTOCOL, v->tcfv_push_proto) || (nla_put_u8(skb, TCA_VLAN_PUSH_VLAN_PRIORITY, v->tcfv_push_prio)))) goto nla_put_failure; tcf_tm_dump(&t, &v->tcf_tm); if (nla_put_64bit(skb, TCA_VLAN_TM, sizeof(t), &t, TCA_VLAN_PAD)) goto nla_put_failure; return skb->len; nla_put_failure: nlmsg_trim(skb, b); return -1; }


Jiri Pirko18685.32%114.29%
Hadar Hen Zion135.96%114.29%
Shmulik Ladkani83.67%114.29%
Jamal Hadi Salim52.29%228.57%
Nicolas Dichtel31.38%114.29%
Américo Wang31.38%114.29%

static int tcf_vlan_walker(struct net *net, struct sk_buff *skb, struct netlink_callback *cb, int type, const struct tc_action_ops *ops) { struct tc_action_net *tn = net_generic(net, vlan_net_id); return tcf_generic_walker(tn, skb, cb, type, ops); }


Américo Wang56100.00%2100.00%

static int tcf_vlan_search(struct net *net, struct tc_action **a, u32 index) { struct tc_action_net *tn = net_generic(net, vlan_net_id); return tcf_idr_search(tn, a, index); }


Américo Wang4197.62%266.67%
Chris Mi12.38%133.33%

static struct tc_action_ops act_vlan_ops = { .kind = "vlan", .type = TCA_ACT_VLAN, .owner = THIS_MODULE, .act = tcf_vlan, .dump = tcf_vlan_dump, .init = tcf_vlan_init, .walk = tcf_vlan_walker, .lookup = tcf_vlan_search, .size = sizeof(struct tcf_vlan), };
static __net_init int vlan_init_net(struct net *net) { struct tc_action_net *tn = net_generic(net, vlan_net_id); return tc_action_net_init(tn, &act_vlan_ops); }


Américo Wang33100.00%1100.00%

static void __net_exit vlan_exit_net(struct net *net) { struct tc_action_net *tn = net_generic(net, vlan_net_id); tc_action_net_exit(tn); }


Américo Wang29100.00%1100.00%

static struct pernet_operations vlan_net_ops = { .init = vlan_init_net, .exit = vlan_exit_net, .id = &vlan_net_id, .size = sizeof(struct tc_action_net), };
static int __init vlan_init_module(void) { return tcf_register_action(&act_vlan_ops, &vlan_net_ops); }


Jiri Pirko1789.47%150.00%
Américo Wang210.53%150.00%

static void __exit vlan_cleanup_module(void) { tcf_unregister_action(&act_vlan_ops, &vlan_net_ops); }


Jiri Pirko1583.33%150.00%
Américo Wang316.67%150.00%

module_init(vlan_init_module); module_exit(vlan_cleanup_module); MODULE_AUTHOR("Jiri Pirko <>"); MODULE_DESCRIPTION("vlan manipulation actions"); MODULE_LICENSE("GPL v2");

Overall Contributors

Jiri Pirko85760.52%16.25%
Américo Wang26018.36%318.75%
Shmulik Ladkani15510.95%212.50%
Jamal Hadi Salim684.80%425.00%
Hadar Hen Zion604.24%16.25%
Chris Mi80.56%16.25%
Nicolas Dichtel30.21%16.25%
Eric Dumazet20.14%16.25%
Johannes Berg20.14%16.25%
Alexey Dobriyan10.07%16.25%
Directory: net/sched
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