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Release 4.8 net/sched/cls_basic.c

Directory: net/sched
 * net/sched/cls_basic.c        Basic Packet Classifier.
 *              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.
 * Authors:     Thomas Graf <>

#include <linux/module.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/rtnetlink.h>
#include <linux/skbuff.h>
#include <net/netlink.h>
#include <net/act_api.h>
#include <net/pkt_cls.h>

struct basic_head {
u32			hgenerator;
struct list_head	flist;
struct rcu_head		rcu;

struct basic_filter {
u32			handle;
struct tcf_exts		exts;
struct tcf_ematch_tree	ematches;
struct tcf_result	res;
struct tcf_proto	*tp;
struct list_head	link;
struct rcu_head		rcu;

static int basic_classify(struct sk_buff *skb, const struct tcf_proto *tp, struct tcf_result *res) { int r; struct basic_head *head = rcu_dereference_bh(tp->root); struct basic_filter *f; list_for_each_entry_rcu(f, &head->flist, link) { if (!tcf_em_tree_match(skb, &f->ematches, NULL)) continue; *res = f->res; r = tcf_exts_exec(skb, &f->exts, res); if (r < 0) continue; return r; } return -1; }


david s. millerdavid s. miller9895.15%133.33%
john fastabendjohn fastabend43.88%133.33%
eric dumazeteric dumazet10.97%133.33%

static unsigned long basic_get(struct tcf_proto *tp, u32 handle) { unsigned long l = 0UL; struct basic_head *head = rtnl_dereference(tp->root); struct basic_filter *f; if (head == NULL) return 0UL; list_for_each_entry(f, &head->flist, link) { if (f->handle == handle) { l = (unsigned long) f; break; } } return l; }


david s. millerdavid s. miller7189.87%133.33%
daniel borkmanndaniel borkmann56.33%133.33%
john fastabendjohn fastabend33.80%133.33%

static int basic_init(struct tcf_proto *tp) { struct basic_head *head; head = kzalloc(sizeof(*head), GFP_KERNEL); if (head == NULL) return -ENOBUFS; INIT_LIST_HEAD(&head->flist); rcu_assign_pointer(tp->root, head); return 0; }


patrick mchardypatrick mchardy4169.49%133.33%
david s. millerdavid s. miller1423.73%133.33%
john fastabendjohn fastabend46.78%133.33%

static void basic_delete_filter(struct rcu_head *head) { struct basic_filter *f = container_of(head, struct basic_filter, rcu); tcf_exts_destroy(&f->exts); tcf_em_tree_destroy(&f->ematches); kfree(f); }


david s. millerdavid s. miller3268.09%150.00%
john fastabendjohn fastabend1531.91%150.00%

static bool basic_destroy(struct tcf_proto *tp, bool force) { struct basic_head *head = rtnl_dereference(tp->root); struct basic_filter *f, *n; if (!force && !list_empty(&head->flist)) return false; list_for_each_entry_safe(f, n, &head->flist, link) { list_del_rcu(&f->link); tcf_unbind_filter(tp, &f->res); call_rcu(&f->rcu, basic_delete_filter); } RCU_INIT_POINTER(tp->root, NULL); kfree_rcu(head, rcu); return true; }


david s. millerdavid s. miller5146.36%120.00%
john fastabendjohn fastabend3128.18%240.00%
cong wangcong wang2421.82%120.00%
patrick mchardypatrick mchardy43.64%120.00%

static int basic_delete(struct tcf_proto *tp, unsigned long arg) { struct basic_filter *f = (struct basic_filter *) arg; list_del_rcu(&f->link); tcf_unbind_filter(tp, &f->res); call_rcu(&f->rcu, basic_delete_filter); return 0; }


david s. millerdavid s. miller3967.24%125.00%
john fastabendjohn fastabend1627.59%250.00%
jiri pirkojiri pirko35.17%125.00%

static const struct nla_policy basic_policy[TCA_BASIC_MAX + 1] = { [TCA_BASIC_CLASSID] = { .type = NLA_U32 }, [TCA_BASIC_EMATCHES] = { .type = NLA_NESTED }, };
static int basic_set_parms(struct net *net, struct tcf_proto *tp, struct basic_filter *f, unsigned long base, struct nlattr **tb, struct nlattr *est, bool ovr) { int err; struct tcf_exts e; struct tcf_ematch_tree t; tcf_exts_init(&e, TCA_BASIC_ACT, TCA_BASIC_POLICE); err = tcf_exts_validate(net, tp, tb, est, &e, ovr); if (err < 0) return err; err = tcf_em_tree_validate(tp, tb[TCA_BASIC_EMATCHES], &t); if (err < 0) goto errout; if (tb[TCA_BASIC_CLASSID]) { f->res.classid = nla_get_u32(tb[TCA_BASIC_CLASSID]); tcf_bind_filter(tp, &f->res, base); } tcf_exts_change(tp, &f->exts, &e); tcf_em_tree_change(tp, &f->ematches, &t); f->tp = tp; return 0; errout: tcf_exts_destroy(&e); return err; }


david s. millerdavid s. miller16183.85%114.29%
americo wangamerico wang105.21%114.29%
benjamin lahaisebenjamin lahaise73.65%114.29%
john fastabendjohn fastabend63.12%114.29%
cong wangcong wang52.60%114.29%
patrick mchardypatrick mchardy31.56%228.57%

static int basic_change(struct net *net, struct sk_buff *in_skb, struct tcf_proto *tp, unsigned long base, u32 handle, struct nlattr **tca, unsigned long *arg, bool ovr) { int err; struct basic_head *head = rtnl_dereference(tp->root); struct nlattr *tb[TCA_BASIC_MAX + 1]; struct basic_filter *fold = (struct basic_filter *) *arg; struct basic_filter *fnew; if (tca[TCA_OPTIONS] == NULL) return -EINVAL; err = nla_parse_nested(tb, TCA_BASIC_MAX, tca[TCA_OPTIONS], basic_policy); if (err < 0) return err; if (fold != NULL) { if (handle && fold->handle != handle) return -EINVAL; } fnew = kzalloc(sizeof(*fnew), GFP_KERNEL); if (!fnew) return -ENOBUFS; tcf_exts_init(&fnew->exts, TCA_BASIC_ACT, TCA_BASIC_POLICE); err = -EINVAL; if (handle) { fnew->handle = handle; } else if (fold) { fnew->handle = fold->handle; } else { unsigned int i = 0x80000000; do { if (++head->hgenerator == 0x7FFFFFFF) head->hgenerator = 1; } while (--i > 0 && basic_get(tp, head->hgenerator)); if (i <= 0) { pr_err("Insufficient number of handles\n"); goto errout; } fnew->handle = head->hgenerator; } err = basic_set_parms(net, tp, fnew, base, tb, tca[TCA_RATE], ovr); if (err < 0) goto errout; *arg = (unsigned long)fnew; if (fold) { list_replace_rcu(&fold->link, &fnew->link); tcf_unbind_filter(tp, &fold->res); call_rcu(&fold->rcu, basic_delete_filter); } else { list_add_rcu(&fnew->link, &head->flist); } return 0; errout: kfree(fnew); return err; }


david s. millerdavid s. miller25164.86%16.67%
john fastabendjohn fastabend8622.22%213.33%
patrick mchardypatrick mchardy143.62%320.00%
americo wangamerico wang112.84%213.33%
benjamin lahaisebenjamin lahaise71.81%16.67%
cong wangcong wang51.29%16.67%
eric w. biedermaneric w. biederman51.29%16.67%
jiri pirkojiri pirko51.29%16.67%
panagiotis issaris*panagiotis issaris*10.26%16.67%
kim nordlundkim nordlund10.26%16.67%
eric dumazeteric dumazet10.26%16.67%

static void basic_walk(struct tcf_proto *tp, struct tcf_walker *arg) { struct basic_head *head = rtnl_dereference(tp->root); struct basic_filter *f; list_for_each_entry(f, &head->flist, link) { if (arg->count < arg->skip) goto skip; if (arg->fn(tp, (unsigned long) f, arg) < 0) { arg->stop = 1; break; } skip: arg->count++; } }


david s. millerdavid s. miller8896.70%150.00%
john fastabendjohn fastabend33.30%150.00%

static int basic_dump(struct net *net, struct tcf_proto *tp, unsigned long fh, struct sk_buff *skb, struct tcmsg *t) { struct basic_filter *f = (struct basic_filter *) fh; struct nlattr *nest; if (f == NULL) return skb->len; t->tcm_handle = f->handle; nest = nla_nest_start(skb, TCA_OPTIONS); if (nest == NULL) goto nla_put_failure; if (f->res.classid && nla_put_u32(skb, TCA_BASIC_CLASSID, f->res.classid)) goto nla_put_failure; if (tcf_exts_dump(skb, &f->exts) < 0 || tcf_em_tree_dump(skb, &f->ematches, TCA_BASIC_EMATCHES) < 0) goto nla_put_failure; nla_nest_end(skb, nest); if (tcf_exts_dump_stats(skb, &f->exts) < 0) goto nla_put_failure; return skb->len; nla_put_failure: nla_nest_cancel(skb, nest); return -1; }


david s. millerdavid s. miller11965.75%225.00%
patrick mchardypatrick mchardy2011.05%225.00%
thomas grafthomas graf189.94%112.50%
stephen hemmingerstephen hemminger179.39%112.50%
americo wangamerico wang52.76%112.50%
arnaldo carvalho de meloarnaldo carvalho de melo21.10%112.50%

static struct tcf_proto_ops cls_basic_ops __read_mostly = { .kind = "basic", .classify = basic_classify, .init = basic_init, .destroy = basic_destroy, .get = basic_get, .change = basic_change, .delete = basic_delete, .walk = basic_walk, .dump = basic_dump, .owner = THIS_MODULE, };
static int __init init_basic(void) { return register_tcf_proto_ops(&cls_basic_ops); }


david s. millerdavid s. miller16100.00%1100.00%

static void __exit exit_basic(void) { unregister_tcf_proto_ops(&cls_basic_ops); }


david s. millerdavid s. miller15100.00%1100.00%

module_init(init_basic) module_exit(exit_basic) MODULE_LICENSE("GPL");

Overall Contributors

david s. millerdavid s. miller108971.32%26.45%
john fastabendjohn fastabend18111.85%26.45%
patrick mchardypatrick mchardy1187.73%825.81%
cong wangcong wang342.23%26.45%
americo wangamerico wang261.70%39.68%
thomas grafthomas graf181.18%13.23%
stephen hemmingerstephen hemminger171.11%13.23%
benjamin lahaisebenjamin lahaise140.92%13.23%
jiri pirkojiri pirko80.52%26.45%
daniel borkmanndaniel borkmann50.33%13.23%
arnaldo carvalho de meloarnaldo carvalho de melo50.33%26.45%
eric w. biedermaneric w. biederman50.33%13.23%
tejun heotejun heo30.20%13.23%
eric dumazeteric dumazet20.13%26.45%
kim nordlundkim nordlund10.07%13.23%
panagiotis issaris*panagiotis issaris*10.07%13.23%
Directory: net/sched
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