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Release 4.15 net/sched/cls_matchall.c

Directory: net/sched
/*
 * net/sched/cls_matchll.c              Match-all classifier
 *
 * Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com>
 *
 * 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/kernel.h>
#include <linux/init.h>
#include <linux/module.h>

#include <net/sch_generic.h>
#include <net/pkt_cls.h>


struct cls_mall_head {
	
struct tcf_exts exts;
	
struct tcf_result res;
	
u32 handle;
	
u32 flags;
	union {
		
struct work_struct work;
		
struct rcu_head	rcu;
	};
};


static int mall_classify(struct sk_buff *skb, const struct tcf_proto *tp, struct tcf_result *res) { struct cls_mall_head *head = rcu_dereference_bh(tp->root); if (tc_skip_sw(head->flags)) return -1; *res = head->res; return tcf_exts_exec(skb, &head->exts, res); }

Contributors

PersonTokensPropCommitsCommitProp
Jiri Pirko4668.66%125.00%
Yotam Gigi1420.90%250.00%
Davide Caratti710.45%125.00%
Total67100.00%4100.00%


static int mall_init(struct tcf_proto *tp) { return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Jiri Pirko14100.00%1100.00%
Total14100.00%1100.00%


static void __mall_destroy(struct cls_mall_head *head) { tcf_exts_destroy(&head->exts); tcf_exts_put_net(&head->exts); kfree(head); }

Contributors

PersonTokensPropCommitsCommitProp
Américo Wang32100.00%1100.00%
Total32100.00%1100.00%


static void mall_destroy_work(struct work_struct *work) { struct cls_mall_head *head = container_of(work, struct cls_mall_head, work); rtnl_lock(); __mall_destroy(head); rtnl_unlock(); }

Contributors

PersonTokensPropCommitsCommitProp
Américo Wang37100.00%2100.00%
Total37100.00%2100.00%


static void mall_destroy_rcu(struct rcu_head *rcu) { struct cls_mall_head *head = container_of(rcu, struct cls_mall_head, rcu); INIT_WORK(&head->work, mall_destroy_work); tcf_queue_work(&head->work); }

Contributors

PersonTokensPropCommitsCommitProp
Jiri Pirko2863.64%133.33%
Américo Wang818.18%133.33%
Yotam Gigi818.18%133.33%
Total44100.00%3100.00%


static void mall_destroy_hw_filter(struct tcf_proto *tp, struct cls_mall_head *head, unsigned long cookie) { struct tc_cls_matchall_offload cls_mall = {}; struct tcf_block *block = tp->chain->block; tc_cls_common_offload_init(&cls_mall.common, tp); cls_mall.command = TC_CLSMATCHALL_DESTROY; cls_mall.cookie = cookie; tc_setup_cb_call(block, NULL, TC_SETUP_CLSMATCHALL, &cls_mall, false); }

Contributors

PersonTokensPropCommitsCommitProp
Jiri Pirko3953.42%350.00%
Yotam Gigi3243.84%233.33%
Or Gerlitz22.74%116.67%
Total73100.00%6100.00%


static int mall_replace_hw_filter(struct tcf_proto *tp, struct cls_mall_head *head, unsigned long cookie) { struct tc_cls_matchall_offload cls_mall = {}; struct tcf_block *block = tp->chain->block; bool skip_sw = tc_skip_sw(head->flags); int err; tc_cls_common_offload_init(&cls_mall.common, tp); cls_mall.command = TC_CLSMATCHALL_REPLACE; cls_mall.exts = &head->exts; cls_mall.cookie = cookie; err = tc_setup_cb_call(block, NULL, TC_SETUP_CLSMATCHALL, &cls_mall, skip_sw); if (err < 0) { mall_destroy_hw_filter(tp, head, cookie); return err; } else if (err > 0) { head->flags |= TCA_CLS_FLAGS_IN_HW; } if (skip_sw && !(head->flags & TCA_CLS_FLAGS_IN_HW)) return -EINVAL; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Jiri Pirko11978.29%360.00%
Yotam Gigi3321.71%240.00%
Total152100.00%5100.00%


static void mall_destroy(struct tcf_proto *tp) { struct cls_mall_head *head = rtnl_dereference(tp->root); if (!head) return; if (!tc_skip_hw(head->flags)) mall_destroy_hw_filter(tp, head, (unsigned long) head); if (tcf_exts_get_net(&head->exts)) call_rcu(&head->rcu, mall_destroy_rcu); else __mall_destroy(head); }

Contributors

PersonTokensPropCommitsCommitProp
Jiri Pirko4051.28%233.33%
Yotam Gigi2025.64%233.33%
Américo Wang1823.08%233.33%
Total78100.00%6100.00%


static void *mall_get(struct tcf_proto *tp, u32 handle) { return NULL; }

Contributors

PersonTokensPropCommitsCommitProp
Jiri Pirko1583.33%150.00%
Américo Wang316.67%150.00%
Total18100.00%2100.00%

static const struct nla_policy mall_policy[TCA_MATCHALL_MAX + 1] = { [TCA_MATCHALL_UNSPEC] = { .type = NLA_UNSPEC }, [TCA_MATCHALL_CLASSID] = { .type = NLA_U32 }, };
static int mall_set_parms(struct net *net, struct tcf_proto *tp, struct cls_mall_head *head, unsigned long base, struct nlattr **tb, struct nlattr *est, bool ovr) { int err; err = tcf_exts_validate(net, tp, tb, est, &head->exts, ovr); if (err < 0) return err; if (tb[TCA_MATCHALL_CLASSID]) { head->res.classid = nla_get_u32(tb[TCA_MATCHALL_CLASSID]); tcf_bind_filter(tp, &head->res, base); } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Jiri Pirko10394.50%250.00%
Yotam Gigi65.50%250.00%
Total109100.00%4100.00%


static int mall_change(struct net *net, struct sk_buff *in_skb, struct tcf_proto *tp, unsigned long base, u32 handle, struct nlattr **tca, void **arg, bool ovr) { struct cls_mall_head *head = rtnl_dereference(tp->root); struct nlattr *tb[TCA_MATCHALL_MAX + 1]; struct cls_mall_head *new; u32 flags = 0; int err; if (!tca[TCA_OPTIONS]) return -EINVAL; if (head) return -EEXIST; err = nla_parse_nested(tb, TCA_MATCHALL_MAX, tca[TCA_OPTIONS], mall_policy, NULL); if (err < 0) return err; if (tb[TCA_MATCHALL_FLAGS]) { flags = nla_get_u32(tb[TCA_MATCHALL_FLAGS]); if (!tc_flags_valid(flags)) return -EINVAL; } new = kzalloc(sizeof(*new), GFP_KERNEL); if (!new) return -ENOBUFS; err = tcf_exts_init(&new->exts, TCA_MATCHALL_ACT, 0); if (err) goto err_exts_init; if (!handle) handle = 1; new->handle = handle; new->flags = flags; err = mall_set_parms(net, tp, new, base, tb, tca[TCA_RATE], ovr); if (err) goto err_set_parms; if (!tc_skip_hw(new->flags)) { err = mall_replace_hw_filter(tp, new, (unsigned long) new); if (err) goto err_replace_hw_filter; } if (!tc_in_hw(new->flags)) new->flags |= TCA_CLS_FLAGS_NOT_IN_HW; *arg = head; rcu_assign_pointer(tp->root, new); return 0; err_replace_hw_filter: err_set_parms: tcf_exts_destroy(&new->exts); err_exts_init: kfree(new); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Jiri Pirko20159.64%222.22%
Yotam Gigi11534.12%333.33%
Or Gerlitz164.75%111.11%
Johannes Berg20.59%111.11%
Américo Wang20.59%111.11%
David S. Miller10.30%111.11%
Total337100.00%9100.00%


static int mall_delete(struct tcf_proto *tp, void *arg, bool *last) { return -EOPNOTSUPP; }

Contributors

PersonTokensPropCommitsCommitProp
Jiri Pirko1565.22%125.00%
Américo Wang626.09%250.00%
Yotam Gigi28.70%125.00%
Total23100.00%4100.00%


static void mall_walk(struct tcf_proto *tp, struct tcf_walker *arg) { struct cls_mall_head *head = rtnl_dereference(tp->root); if (arg->count < arg->skip) goto skip; if (arg->fn(tp, head, arg) < 0) arg->stop = 1; skip: arg->count++; }

Contributors

PersonTokensPropCommitsCommitProp
Jiri Pirko6898.55%150.00%
Yotam Gigi11.45%150.00%
Total69100.00%2100.00%


static int mall_dump(struct net *net, struct tcf_proto *tp, void *fh, struct sk_buff *skb, struct tcmsg *t) { struct cls_mall_head *head = fh; struct nlattr *nest; if (!head) return skb->len; t->tcm_handle = head->handle; nest = nla_nest_start(skb, TCA_OPTIONS); if (!nest) goto nla_put_failure; if (head->res.classid && nla_put_u32(skb, TCA_MATCHALL_CLASSID, head->res.classid)) goto nla_put_failure; if (head->flags && nla_put_u32(skb, TCA_MATCHALL_FLAGS, head->flags)) goto nla_put_failure; if (tcf_exts_dump(skb, &head->exts)) goto nla_put_failure; nla_nest_end(skb, nest); if (tcf_exts_dump_stats(skb, &head->exts) < 0) goto nla_put_failure; return skb->len; nla_put_failure: nla_nest_cancel(skb, nest); return -1; }

Contributors

PersonTokensPropCommitsCommitProp
Jiri Pirko14883.15%125.00%
Or Gerlitz2011.24%125.00%
Yotam Gigi84.49%125.00%
Américo Wang21.12%125.00%
Total178100.00%4100.00%


static void mall_bind_class(void *fh, u32 classid, unsigned long cl) { struct cls_mall_head *head = fh; if (head && head->res.classid == classid) head->res.class = cl; }

Contributors

PersonTokensPropCommitsCommitProp
Américo Wang44100.00%1100.00%
Total44100.00%1100.00%

static struct tcf_proto_ops cls_mall_ops __read_mostly = { .kind = "matchall", .classify = mall_classify, .init = mall_init, .destroy = mall_destroy, .get = mall_get, .change = mall_change, .delete = mall_delete, .walk = mall_walk, .dump = mall_dump, .bind_class = mall_bind_class, .owner = THIS_MODULE, };
static int __init cls_mall_init(void) { return register_tcf_proto_ops(&cls_mall_ops); }

Contributors

PersonTokensPropCommitsCommitProp
Jiri Pirko16100.00%1100.00%
Total16100.00%1100.00%


static void __exit cls_mall_exit(void) { unregister_tcf_proto_ops(&cls_mall_ops); }

Contributors

PersonTokensPropCommitsCommitProp
Jiri Pirko15100.00%1100.00%
Total15100.00%1100.00%

module_init(cls_mall_init); module_exit(cls_mall_exit); MODULE_AUTHOR("Jiri Pirko <jiri@mellanox.com>"); MODULE_DESCRIPTION("Match-all classifier"); MODULE_LICENSE("GPL v2");

Overall Contributors

PersonTokensPropCommitsCommitProp
Jiri Pirko102069.11%527.78%
Yotam Gigi24316.46%316.67%
Américo Wang16511.18%527.78%
Or Gerlitz382.57%211.11%
Davide Caratti70.47%15.56%
Johannes Berg20.14%15.56%
David S. Miller10.07%15.56%
Total1476100.00%18100.00%
Directory: net/sched
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