Release 4.11 net/sched/cls_u32.c

/*
 * net/sched/cls_u32.c  Ugly (or Universal) 32bit key 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:     Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
 *
 *      The filters are packed to hash tables of key nodes
 *      with a set of 32bit key/mask pairs at every node.
 *      Nodes reference next level hash tables etc.
 *
 *      This scheme is the best universal classifier I managed to
 *      invent; it is not super-fast, but it is not slow (provided you
 *      program it correctly), and general enough.  And its relative
 *      speed grows as the number of rules becomes larger.
 *
 *      It seems that it represents the best middle point between
 *      speed and manageability both by human and by machine.
 *
 *      It is especially useful for link sharing combined with QoS;
 *      pure RSVP doesn't need such a general approach and can use
 *      much simpler (and faster) schemes, sort of cls_rsvp.c.
 *
 *      JHS: We should remove the CONFIG_NET_CLS_IND from here
 *      eventually when the meta match extension is made available
 *
 *      nfmark match added by Catalin(ux aka Dino) BOIE <catab at umbrella.ro>
 */

#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/percpu.h>
#include <linux/rtnetlink.h>
#include <linux/skbuff.h>
#include <linux/bitmap.h>
#include <net/netlink.h>
#include <net/act_api.h>
#include <net/pkt_cls.h>
#include <linux/netdevice.h>


struct tc_u_knode {
	
struct tc_u_knode __rcu	*next;
	
u32			handle;
	
struct tc_u_hnode __rcu	*ht_up;
	
struct tcf_exts		exts;
#ifdef CONFIG_NET_CLS_IND
	
int			ifindex;
#endif
	
u8			fshift;
	
struct tcf_result	res;
	
struct tc_u_hnode __rcu	*ht_down;
#ifdef CONFIG_CLS_U32_PERF
	
struct tc_u32_pcnt __percpu *pf;
#endif
	
u32			flags;
#ifdef CONFIG_CLS_U32_MARK
	
u32			val;
	
u32			mask;
	
u32 __percpu		*pcpu_success;
#endif
	
struct tcf_proto	*tp;
	
struct rcu_head		rcu;
	/* The 'sel' field MUST be the last field in structure to allow for
         * tc_u32_keys allocated at end of structure.
         */
	
struct tc_u32_sel	sel;
};


struct tc_u_hnode {
	
struct tc_u_hnode __rcu	*next;
	
u32			handle;
	
u32			prio;
	
struct tc_u_common	*tp_c;
	
int			refcnt;
	
unsigned int		divisor;
	
struct rcu_head		rcu;
	/* The 'ht' field MUST be the last field in structure to allow for
         * more entries allocated at end of structure.
         */
	
struct tc_u_knode __rcu	*ht[1];
};


struct tc_u_common {
	
struct tc_u_hnode __rcu	*hlist;
	
struct Qdisc		*q;
	
int			refcnt;
	
u32			hgenerator;
	
struct rcu_head		rcu;
};



static inline unsigned int u32_hash_fold(__be32 key,
					 const struct tc_u32_sel *sel,
					 u8 fshift)
{
	unsigned int h = ntohl(key & sel->hmask) >> fshift;

	return h;
}

Contributors
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Linus Torvalds (pre-git)
25
65.79%
1
16.67%
Jamal Hadi Salim
5
13.16%
2
33.33%
Eric Dumazet
4
10.53%
1
16.67%
Radu Rendec
3
7.89%
1
16.67%
Al Viro
1
2.63%
1
16.67%
Total
38
100.00%
6
100.00%



static int u32_classify(struct sk_buff *skb, const struct tcf_proto *tp,
			struct tcf_result *res)
{
	struct {
		struct tc_u_knode *knode;
		unsigned int	  off;
	} stack[TC_U32_MAXDEPTH];

	struct tc_u_hnode *ht = rcu_dereference_bh(tp->root);
	unsigned int off = skb_network_offset(skb);
	struct tc_u_knode *n;
	int sdepth = 0;
	int off2 = 0;
	int sel = 0;
#ifdef CONFIG_CLS_U32_PERF
	int j;
#endif
	int i, r;

next_ht:
	n = rcu_dereference_bh(ht->ht[sel]);

next_knode:
	if (n) {
		struct tc_u32_key *key = n->sel.keys;

#ifdef CONFIG_CLS_U32_PERF
		__this_cpu_inc(n->pf->rcnt);
		j = 0;
#endif

		if (tc_skip_sw(n->flags)) {
			n = rcu_dereference_bh(n->next);
			goto next_knode;
		}

#ifdef CONFIG_CLS_U32_MARK
		if ((skb->mark & n->mask) != n->val) {
			n = rcu_dereference_bh(n->next);
			goto next_knode;
		} else {
			__this_cpu_inc(*n->pcpu_success);
		}
#endif

		for (i = n->sel.nkeys; i > 0; i--, key++) {
			int toff = off + key->off + (off2 & key->offmask);
			__be32 *data, hdata;

			if (skb_headroom(skb) + toff > INT_MAX)
				goto out;

			data = skb_header_pointer(skb, toff, 4, &hdata);
			if (!data)
				goto out;
			if ((*data ^ key->val) & key->mask) {
				n = rcu_dereference_bh(n->next);
				goto next_knode;
			}
#ifdef CONFIG_CLS_U32_PERF
			__this_cpu_inc(n->pf->kcnts[j]);
			j++;
#endif
		}

		ht = rcu_dereference_bh(n->ht_down);
		if (!ht) {
check_terminal:
			if (n->sel.flags & TC_U32_TERMINAL) {

				*res = n->res;
#ifdef CONFIG_NET_CLS_IND
				if (!tcf_match_indev(skb, n->ifindex)) {
					n = rcu_dereference_bh(n->next);
					goto next_knode;
				}
#endif
#ifdef CONFIG_CLS_U32_PERF
				__this_cpu_inc(n->pf->rhit);
#endif
				r = tcf_exts_exec(skb, &n->exts, res);
				if (r < 0) {
					n = rcu_dereference_bh(n->next);
					goto next_knode;
				}

				return r;
			}
			n = rcu_dereference_bh(n->next);
			goto next_knode;
		}

		/* PUSH */
		if (sdepth >= TC_U32_MAXDEPTH)
			goto deadloop;
		stack[sdepth].knode = n;
		stack[sdepth].off = off;
		sdepth++;

		ht = rcu_dereference_bh(n->ht_down);
		sel = 0;
		if (ht->divisor) {
			__be32 *data, hdata;

			data = skb_header_pointer(skb, off + n->sel.hoff, 4,
						  &hdata);
			if (!data)
				goto out;
			sel = ht->divisor & u32_hash_fold(*data, &n->sel,
							  n->fshift);
		}
		if (!(n->sel.flags & (TC_U32_VAROFFSET | TC_U32_OFFSET | TC_U32_EAT)))
			goto next_ht;

		if (n->sel.flags & (TC_U32_OFFSET | TC_U32_VAROFFSET)) {
			off2 = n->sel.off + 3;
			if (n->sel.flags & TC_U32_VAROFFSET) {
				__be16 *data, hdata;

				data = skb_header_pointer(skb,
							  off + n->sel.offoff,
							  2, &hdata);
				if (!data)
					goto out;
				off2 += ntohs(n->sel.offmask & *data) >>
					n->sel.offshift;
			}
			off2 &= ~3;
		}
		if (n->sel.flags & TC_U32_EAT) {
			off += off2;
			off2 = 0;
		}

		if (off < skb->len)
			goto next_ht;
	}

	/* POP */
	if (sdepth--) {
		n = stack[sdepth].knode;
		ht = rcu_dereference_bh(n->ht_up);
		off = stack[sdepth].off;
		goto check_terminal;
	}
out:
	return -1;

deadloop:
	net_warn_ratelimited("cls_u32: dead loop\n");
	return -1;
}

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415
52.80%
2
9.09%
Changli Gao
116
14.76%
1
4.55%
Jamal Hadi Salim
86
10.94%
3
13.64%
John Fastabend
51
6.49%
2
9.09%
Catalin(ux aka Dino) M. Boie
37
4.71%
1
4.55%
Stephen Hemminger
25
3.18%
2
9.09%
Thomas Graf
23
2.93%
3
13.64%
Sridhar Samudrala
23
2.93%
1
4.55%
Dan Carpenter
2
0.25%
1
4.55%
David S. Miller
2
0.25%
1
4.55%
Arnaldo Carvalho de Melo
2
0.25%
1
4.55%
Joe Perches
1
0.13%
1
4.55%
Linus Torvalds
1
0.13%
1
4.55%
Américo Wang
1
0.13%
1
4.55%
Eric Dumazet
1
0.13%
1
4.55%
Total
786
100.00%
22
100.00%



static struct tc_u_hnode *u32_lookup_ht(struct tc_u_common *tp_c, u32 handle)
{
	struct tc_u_hnode *ht;

	for (ht = rtnl_dereference(tp_c->hlist);
	     ht;
	     ht = rtnl_dereference(ht->next))
		if (ht->handle == handle)
			break;

	return ht;
}

Contributors
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CommitProp
Linus Torvalds (pre-git)
33
60.00%
1
33.33%
Eric Dumazet
16
29.09%
1
33.33%
John Fastabend
6
10.91%
1
33.33%
Total
55
100.00%
3
100.00%



static struct tc_u_knode *u32_lookup_key(struct tc_u_hnode *ht, u32 handle)
{
	unsigned int sel;
	struct tc_u_knode *n = NULL;

	sel = TC_U32_HASH(handle);
	if (sel > ht->divisor)
		goto out;

	for (n = rtnl_dereference(ht->ht[sel]);
	     n;
	     n = rtnl_dereference(n->next))
		if (n->handle == handle)
			break;
out:
	return n;
}


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Linus Torvalds (pre-git)
68
80.95%
1
25.00%
Arnaldo Carvalho de Melo
8
9.52%
1
25.00%
John Fastabend
6
7.14%
1
25.00%
Eric Dumazet
2
2.38%
1
25.00%
Total
84
100.00%
4
100.00%



static unsigned long u32_get(struct tcf_proto *tp, u32 handle)
{
	struct tc_u_hnode *ht;
	struct tc_u_common *tp_c = tp->data;

	if (TC_U32_HTID(handle) == TC_U32_ROOT)
		ht = rtnl_dereference(tp->root);
	else
		ht = u32_lookup_ht(tp_c, TC_U32_HTID(handle));

	if (!ht)
		return 0;

	if (TC_U32_KEY(handle) == 0)
		return (unsigned long)ht;

	return (unsigned long)u32_lookup_key(ht, handle);
}

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96.88%
1
50.00%
John Fastabend
3
3.12%
1
50.00%
Total
96
100.00%
2
100.00%



static u32 gen_new_htid(struct tc_u_common *tp_c)
{
	int i = 0x800;

	/* hgenerator only used inside rtnl lock it is safe to increment
         * without read _copy_ update semantics
         */
	do {
		if (++tp_c->hgenerator == 0x7FF)
			tp_c->hgenerator = 1;
	} while (--i > 0 && u32_lookup_ht(tp_c, (tp_c->hgenerator|0x800)<<20));

	return i > 0 ? (tp_c->hgenerator|0x800)<<20 : 0;
}

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73
97.33%
1
33.33%
Linus Torvalds
1
1.33%
1
33.33%
John Fastabend
1
1.33%
1
33.33%
Total
75
100.00%
3
100.00%



static int u32_init(struct tcf_proto *tp)
{
	struct tc_u_hnode *root_ht;
	struct tc_u_common *tp_c;

	tp_c = tp->q->u32_node;

	root_ht = kzalloc(sizeof(*root_ht), GFP_KERNEL);
	if (root_ht == NULL)
		return -ENOBUFS;

	root_ht->refcnt++;
	root_ht->handle = tp_c ? gen_new_htid(tp_c) : 0x80000000;
	root_ht->prio = tp->prio;

	if (tp_c == NULL) {
		tp_c = kzalloc(sizeof(*tp_c), GFP_KERNEL);
		if (tp_c == NULL) {
			kfree(root_ht);
			return -ENOBUFS;
		}
		tp_c->q = tp->q;
		tp->q->u32_node = tp_c;
	}

	tp_c->refcnt++;
	RCU_INIT_POINTER(root_ht->next, tp_c->hlist);
	rcu_assign_pointer(tp_c->hlist, root_ht);
	root_ht->tp_c = tp_c;

	rcu_assign_pointer(tp->root, root_ht);
	tp->data = tp_c;
	return 0;
}

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Linus Torvalds (pre-git)
152
83.98%
1
20.00%
John Fastabend
12
6.63%
1
20.00%
Patrick McHardy
8
4.42%
1
20.00%
David S. Miller
7
3.87%
1
20.00%
Panagiotis Issaris
2
1.10%
1
20.00%
Total
181
100.00%
5
100.00%



static int u32_destroy_key(struct tcf_proto *tp, struct tc_u_knode *n,
			   bool free_pf)
{
	tcf_exts_destroy(&n->exts);
	if (n->ht_down)
		n->ht_down->refcnt--;
#ifdef CONFIG_CLS_U32_PERF
	if (free_pf)
		free_percpu(n->pf);
#endif
#ifdef CONFIG_CLS_U32_MARK
	if (free_pf)
		free_percpu(n->pcpu_success);
#endif
	kfree(n);
	return 0;
}

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51.25%
1
14.29%
John Fastabend
24
30.00%
3
42.86%
Jamal Hadi Salim
12
15.00%
2
28.57%
Thomas Graf
3
3.75%
1
14.29%
Total
80
100.00%
7
100.00%

/* u32_delete_key_rcu should be called when free'ing a copied
 * version of a tc_u_knode obtained from u32_init_knode(). When
 * copies are obtained from u32_init_knode() the statistics are
 * shared between the old and new copies to allow readers to
 * continue to update the statistics during the copy. To support
 * this the u32_delete_key_rcu variant does not free the percpu
 * statistics.
 */


static void u32_delete_key_rcu(struct rcu_head *rcu)
{
	struct tc_u_knode *key = container_of(rcu, struct tc_u_knode, rcu);

	u32_destroy_key(key->tp, key, false);
}

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/* u32_delete_key_freepf_rcu is the rcu callback variant
 * that free's the entire structure including the statistics
 * percpu variables. Only use this if the key is not a copy
 * returned by u32_init_knode(). See u32_delete_key_rcu()
 * for the variant that should be used with keys return from
 * u32_init_knode()
 */


static void u32_delete_key_freepf_rcu(struct rcu_head *rcu)
{
	struct tc_u_knode *key = container_of(rcu, struct tc_u_knode, rcu);

	u32_destroy_key(key->tp, key, true);
}

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static int u32_delete_key(struct tcf_proto *tp, struct tc_u_knode *key)
{
	struct tc_u_knode __rcu **kp;
	struct tc_u_knode *pkp;
	struct tc_u_hnode *ht = rtnl_dereference(key->ht_up);

	if (ht) {
		kp = &ht->ht[TC_U32_HASH(key->handle)];
		for (pkp = rtnl_dereference(*kp); pkp;
		     kp = &pkp->next, pkp = rtnl_dereference(*kp)) {
			if (pkp == key) {
				RCU_INIT_POINTER(*kp, key->next);

				tcf_unbind_filter(tp, &key->res);
				call_rcu(&key->rcu, u32_delete_key_freepf_rcu);
				return 0;
			}
		}
	}
	WARN_ON(1);
	return 0;
}

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Linus Torvalds (pre-git)
90
64.75%
3
37.50%
John Fastabend
37
26.62%
3
37.50%
Américo Wang
10
7.19%
1
12.50%
Ilpo Järvinen
2
1.44%
1
12.50%
Total
139
100.00%
8
100.00%



static void u32_remove_hw_knode(struct tcf_proto *tp, u32 handle)
{
	struct net_device *dev = tp->q->dev_queue->dev;
	struct tc_cls_u32_offload u32_offload = {0};
	struct tc_to_netdev offload;

	offload.type = TC_SETUP_CLSU32;
	offload.cls_u32 = &u32_offload;

	if (tc_should_offload(dev, tp, 0)) {
		offload.cls_u32->command = TC_CLSU32_DELETE_KNODE;
		offload.cls_u32->knode.handle = handle;
		dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle,
					      tp->protocol, &offload);
	}
}

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2
1.90%
1
25.00%
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105
100.00%
4
100.00%



static int u32_replace_hw_hnode(struct tcf_proto *tp, struct tc_u_hnode *h,
				u32 flags)
{
	struct net_device *dev = tp->q->dev_queue->dev;
	struct tc_cls_u32_offload u32_offload = {0};
	struct tc_to_netdev offload;
	int err;

	if (!tc_should_offload(dev, tp, flags))
		return tc_skip_sw(flags) ? -EINVAL : 0;

	offload.type = TC_SETUP_CLSU32;
	offload.cls_u32 = &u32_offload;

	offload.cls_u32->command = TC_CLSU32_NEW_HNODE;
	offload.cls_u32->hnode.divisor = h->divisor;
	offload.cls_u32->hnode.handle = h->handle;
	offload.cls_u32->hnode.prio = h->prio;

	err = dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle,
					    tp->protocol, &offload);
	if (tc_skip_sw(flags))
		return err;

	return 0;
}

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21
12.80%
1
20.00%
Sridhar Samudrala
19
11.59%
1
20.00%
Daniel Borkmann
2
1.22%
1
20.00%
Total
164
100.00%
5
100.00%



static void u32_clear_hw_hnode(struct tcf_proto *tp, struct tc_u_hnode *h)
{
	struct net_device *dev = tp->q->dev_queue->dev;
	struct tc_cls_u32_offload u32_offload = {0};
	struct tc_to_netdev offload;

	offload.type = TC_SETUP_CLSU32;
	offload.cls_u32 = &u32_offload;

	if (tc_should_offload(dev, tp, 0)) {
		offload.cls_u32->command = TC_CLSU32_DELETE_HNODE;
		offload.cls_u32->hnode.divisor = h->divisor;
		offload.cls_u32->hnode.handle = h->handle;
		offload.cls_u32->hnode.prio = h->prio;

		dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle,
					      tp->protocol, &offload);
	}
}

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2
1.50%
1
25.00%
Total
133
100.00%
4
100.00%



static int u32_replace_hw_knode(struct tcf_proto *tp, struct tc_u_knode *n,
				u32 flags)
{
	struct net_device *dev = tp->q->dev_queue->dev;
	struct tc_cls_u32_offload u32_offload = {0};
	struct tc_to_netdev offload;
	int err;

	offload.type = TC_SETUP_CLSU32;
	offload.cls_u32 = &u32_offload;

	if (!tc_should_offload(dev, tp, flags))
		return tc_skip_sw(flags) ? -EINVAL : 0;

	offload.cls_u32->command = TC_CLSU32_REPLACE_KNODE;
	offload.cls_u32->knode.handle = n->handle;
	offload.cls_u32->knode.fshift = n->fshift;
#ifdef CONFIG_CLS_U32_MARK
	offload.cls_u32->knode.val = n->val;
	offload.cls_u32->knode.mask = n->mask;
#else
	offload.cls_u32->knode.val = 0;
	offload.cls_u32->knode.mask = 0;
#endif
	offload.cls_u32->knode.sel = &n->sel;
	offload.cls_u32->knode.exts = &n->exts;
	if (n->ht_down)
		offload.cls_u32->knode.link_handle = n->ht_down->handle;

	err = dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle,
					    tp->protocol, &offload);

	if (!err)
		n->flags |= TCA_CLS_FLAGS_IN_HW;

	if (tc_skip_sw(flags))
		return err;

	return 0;
}

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7.31%
1
14.29%
Jakub Kiciński
12
4.62%
1
14.29%
Or Gerlitz
11
4.23%
1
14.29%
Daniel Borkmann
2
0.77%
1
14.29%
Total
260
100.00%
7
100.00%



static void u32_clear_hnode(struct tcf_proto *tp, struct tc_u_hnode *ht)
{
	struct tc_u_knode *n;
	unsigned int h;

	for (h = 0; h <= ht->divisor; h++) {
		while ((n = rtnl_dereference(ht->ht[h])) != NULL) {
			RCU_INIT_POINTER(ht->ht[h],
					 rtnl_dereference(n->next));
			tcf_unbind_filter(tp, &n->res);
			u32_remove_hw_knode(tp, n->handle);
			call_rcu(&n->rcu, u32_delete_key_freepf_rcu);
		}
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
67
62.04%
1
16.67%
John Fastabend
25
23.15%
3
50.00%
Américo Wang
15
13.89%
1
16.67%
Eric Dumazet
1
0.93%
1
16.67%
Total
108
100.00%
6
100.00%



static int u32_destroy_hnode(struct tcf_proto *tp, struct tc_u_hnode *ht)
{
	struct tc_u_common *tp_c = tp->data;
	struct tc_u_hnode __rcu **hn;
	struct tc_u_hnode *phn;

	WARN_ON(ht->refcnt);

	u32_clear_hnode(tp, ht);

	hn = &tp_c->hlist;
	for (phn = rtnl_dereference(*hn);
	     phn;
	     hn = &phn->next, phn = rtnl_dereference(*hn)) {
		if (phn == ht) {
			u32_clear_hw_hnode(tp, ht);
			RCU_INIT_POINTER(*hn, ht->next);
			kfree_rcu(ht, rcu);
			return 0;
		}
	}

	return -ENOENT;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
83
65.87%
1
20.00%
John Fastabend
40
31.75%
2
40.00%
Américo Wang
2
1.59%
1
20.00%
Ilpo Järvinen
1
0.79%
1
20.00%
Total
126
100.00%
5
100.00%



static bool ht_empty(struct tc_u_hnode *ht)
{
	unsigned int h;

	for (h = 0; h <= ht->divisor; h++)
		if (rcu_access_pointer(ht->ht[h]))
			return false;

	return true;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Cong Wang
48
100.00%
1
100.00%
Total
48
100.00%
1
100.00%



static bool u32_destroy(struct tcf_proto *tp, bool force)
{
	struct tc_u_common *tp_c = tp->data;
	struct tc_u_hnode *root_ht = rtnl_dereference(tp->root);

	WARN_ON(root_ht == NULL);

	if (!force) {
		if (root_ht) {
			if (root_ht->refcnt > 1)
				return false;
			if (root_ht->refcnt == 1) {
				if (!ht_empty(root_ht))
					return false;
			}
		}

		if (tp_c->refcnt > 1)
			return false;

		if (tp_c->refcnt == 1) {
			struct tc_u_hnode *ht;

			for (ht = rtnl_dereference(tp_c->hlist);
			     ht;
			     ht = rtnl_dereference(ht->next))
				if (!ht_empty(ht))
					return false;
		}
	}

	if (root_ht && --root_ht->refcnt == 0)
		u32_destroy_hnode(tp, root_ht);

	if (--tp_c->refcnt == 0) {
		struct tc_u_hnode *ht;

		tp->q->u32_node = NULL;

		for (ht = rtnl_dereference(tp_c->hlist);
		     ht;
		     ht = rtnl_dereference(ht->next)) {
			ht->refcnt--;
			u32_clear_hnode(tp, ht);
		}

		while ((ht = rtnl_dereference(tp_c->hlist)) != NULL) {
			RCU_INIT_POINTER(tp_c->hlist, ht->next);
			kfree_rcu(ht, rcu);
		}

		kfree(tp_c);
	}

	tp->data = NULL;
	return true;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
128
46.89%
1
12.50%
Américo Wang
61
22.34%
2
25.00%
Cong Wang
52
19.05%
1
12.50%
John Fastabend
18
6.59%
1
12.50%
Jarek Poplawski
7
2.56%
1
12.50%
David S. Miller
5
1.83%
1
12.50%
Ilpo Järvinen
2
0.73%
1
12.50%
Total
273
100.00%
8
100.00%



static int u32_delete(struct tcf_proto *tp, unsigned long arg)
{
	struct tc_u_hnode *ht = (struct tc_u_hnode *)arg;
	struct tc_u_hnode *root_ht = rtnl_dereference(tp->root);

	if (ht == NULL)
		return 0;

	if (TC_U32_KEY(ht->handle)) {
		u32_remove_hw_knode(tp, ht->handle);
		return u32_delete_key(tp, (struct tc_u_knode *)ht);
	}

	if (root_ht == ht)
		return -EINVAL;

	if (ht->refcnt == 1) {
		ht->refcnt--;
		u32_destroy_hnode(tp, ht);
	} else {
		return -EBUSY;
	}

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
84
68.29%
1
25.00%
John Fastabend
24
19.51%
2
50.00%
Jarek Poplawski
15
12.20%
1
25.00%
Total
123
100.00%
4
100.00%


#define NR_U32_NODE (1<<12)


static u32 gen_new_kid(struct tc_u_hnode *ht, u32 handle)
{
	struct tc_u_knode *n;
	unsigned long i;
	unsigned long *bitmap = kzalloc(BITS_TO_LONGS(NR_U32_NODE) * sizeof(unsigned long),
					GFP_KERNEL);
	if (!bitmap)
		return handle | 0xFFF;

	for (n = rtnl_dereference(ht->ht[TC_U32_HASH(handle)]);
	     n;
	     n = rtnl_dereference(n->next))
		set_bit(TC_U32_NODE(n->handle), bitmap);

	i = find_next_zero_bit(bitmap, NR_U32_NODE, 0x800);
	if (i >= NR_U32_NODE)
		i = find_next_zero_bit(bitmap, NR_U32_NODE, 1);

	kfree(bitmap);
	return handle | (i >= NR_U32_NODE ? 0xFFF : i);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
69
49.29%
1
33.33%
Cong Wang
65
46.43%
1
33.33%
John Fastabend
6
4.29%
1
33.33%
Total
140
100.00%
3
100.00%


static const struct nla_policy u32_policy[TCA_U32_MAX + 1] = {
	[TCA_U32_CLASSID]	= { .type = NLA_U32 },
	[TCA_U32_HASH]		= { .type = NLA_U32 },
	[TCA_U32_LINK]		= { .type = NLA_U32 },
	[TCA_U32_DIVISOR]	= { .type = NLA_U32 },
	[TCA_U32_SEL]		= { .len = sizeof(struct tc_u32_sel) },
	[TCA_U32_INDEV]		= { .type = NLA_STRING, .len = IFNAMSIZ },
	[TCA_U32_MARK]		= { .len = sizeof(struct tc_u32_mark) },
	[TCA_U32_FLAGS]		= { .type = NLA_U32 },
};



static int u32_set_parms(struct net *net, struct tcf_proto *tp,
			 unsigned long base, struct tc_u_hnode *ht,
			 struct tc_u_knode *n, struct nlattr **tb,
			 struct nlattr *est, bool ovr)
{
	struct tcf_exts e;
	int err;

	err = tcf_exts_init(&e, TCA_U32_ACT, TCA_U32_POLICE);
	if (err < 0)
		return err;
	err = tcf_exts_validate(net, tp, tb, est, &e, ovr);
	if (err < 0)
		goto errout;

	err = -EINVAL;
	if (tb[TCA_U32_LINK]) {
		u32 handle = nla_get_u32(tb[TCA_U32_LINK]);
		struct tc_u_hnode *ht_down = NULL, *ht_old;

		if (TC_U32_KEY(handle))
			goto errout;

		if (handle) {
			ht_down = u32_lookup_ht(ht->tp_c, handle);

			if (ht_down == NULL)
				goto errout;
			ht_down->refcnt++;
		}

		ht_old = rtnl_dereference(n->ht_down);
		rcu_assign_pointer(n->ht_down, ht_down);

		if (ht_old)
			ht_old->refcnt--;
	}
	if (tb[TCA_U32_CLASSID]) {
		n->res.classid = nla_get_u32(tb[TCA_U32_CLASSID]);
		tcf_bind_filter(tp, &n->res, base);
	}

#ifdef CONFIG_NET_CLS_IND
	if (tb[TCA_U32_INDEV]) {
		int ret;
		ret = tcf_change_indev(net, tb[TCA_U32_INDEV]);
		if (ret < 0)
			goto errout;
		n->ifindex = ret;
	}
#endif
	tcf_exts_change(tp, &n->exts, &e);

	return 0;
errout:
	tcf_exts_destroy(&e);
	return err;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
150
48.70%
3
17.65%
Thomas Graf
72
23.38%
2
11.76%
Américo Wang
39
12.66%
3
17.65%
Patrick McHardy
14
4.55%
3
17.65%
Jamal Hadi Salim
13
4.22%
2
11.76%
Benjamin LaHaise
7
2.27%
1
5.88%
John Fastabend
6
1.95%
1
5.88%
Cong Wang
5
1.62%
1
5.88%
Stephen Hemminger
2
0.65%
1
5.88%
Total
308
100.00%
17
100.00%



static void u32_replace_knode(struct tcf_proto *tp, struct tc_u_common *tp_c,
			      struct tc_u_knode *n)
{
	struct tc_u_knode __rcu **ins;
	struct tc_u_knode *pins;
	struct tc_u_hnode *ht;

	if (TC_U32_HTID(n->handle) == TC_U32_ROOT)
		ht = rtnl_dereference(tp->root);
	else
		ht = u32_lookup_ht(tp_c, TC_U32_HTID(n->handle));

	ins = &ht->ht[TC_U32_HASH(n->handle)];

	/* The node must always exist for it to be replaced if this is not the
         * case then something went very wrong elsewhere.
         */
	for (pins = rtnl_dereference(*ins); ;
	     ins = &pins->next, pins = rtnl_dereference(*ins))
		if (pins->handle == n->handle)
			break;

	RCU_INIT_POINTER(n->next, pins->next);
	rcu_assign_pointer(*ins, n);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
John Fastabend
145
100.00%
1
100.00%
Total
145
100.00%
1
100.00%



static struct tc_u_knode *u32_init_knode(struct tcf_proto *tp,
					 struct tc_u_knode *n)
{
	struct tc_u_knode *new;
	struct tc_u32_sel *s = &n->sel;

	new = kzalloc(sizeof(*n) + s->nkeys*sizeof(struct tc_u32_key),
		      GFP_KERNEL);

	if (!new)
		return NULL;

	RCU_INIT_POINTER(new->next, n->next);
	new->handle = n->handle;
	RCU_INIT_POINTER(new->ht_up, n->ht_up);

#ifdef CONFIG_NET_CLS_IND
	new->ifindex = n->ifindex;
#endif
	new->fshift = n->fshift;
	new->res = n->res;
	new->flags = n->flags;
	RCU_INIT_POINTER(new->ht_down, n->ht_down);

	/* bump reference count as long as we hold pointer to structure */
	if (new->ht_down)
		new->ht_down->refcnt++;

#ifdef CONFIG_CLS_U32_PERF
	/* Statistics may be incremented by readers during update
         * so we must keep them in tact. When the node is later destroyed
         * a special destroy call must be made to not free the pf memory.
         */
	new->pf = n->pf;
#endif

#ifdef CONFIG_CLS_U32_MARK
	new->val = n->val;
	new->mask = n->mask;
	/* Similarly success statistics must be moved as pointers */
	new->pcpu_success = n->pcpu_success;
#endif
	new->tp = tp;
	memcpy(&new->sel, s, sizeof(*s) + s->nkeys*sizeof(struct tc_u32_key));

	if (tcf_exts_init(&new->exts, TCA_U32_ACT, TCA_U32_POLICE)) {
		kfree(new);
		return NULL;
	}

	return new;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
John Fastabend
247
95.37%
2
66.67%
Américo Wang
12
4.63%
1
33.33%
Total
259
100.00%
3
100.00%



static int u32_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)
{
	struct tc_u_common *tp_c = tp->data;
	struct tc_u_hnode *ht;
	struct tc_u_knode *n;
	struct tc_u32_sel *s;
	struct nlattr *opt = tca[TCA_OPTIONS];
	struct nlattr *tb[TCA_U32_MAX + 1];
	u32 htid, flags = 0;
	int err;
#ifdef CONFIG_CLS_U32_PERF
	size_t size;
#endif

	if (opt == NULL)
		return handle ? -EINVAL : 0;

	err = nla_parse_nested(tb, TCA_U32_MAX, opt, u32_policy);
	if (err < 0)
		return err;

	if (tb[TCA_U32_FLAGS]) {
		flags = nla_get_u32(tb[TCA_U32_FLAGS]);
		if (!tc_flags_valid(flags))
			return -EINVAL;
	}

	n = (struct tc_u_knode *)*arg;
	if (n) {
		struct tc_u_knode *new;

		if (TC_U32_KEY(n->handle) == 0)
			return -EINVAL;

		if (n->flags != flags)
			return -EINVAL;

		new = u32_init_knode(tp, n);
		if (!new)
			return -ENOMEM;

		err = u32_set_parms(net, tp, base,
				    rtnl_dereference(n->ht_up), new, tb,
				    tca[TCA_RATE], ovr);

		if (err) {
			u32_destroy_key(tp, new, false);
			return err;
		}

		err = u32_replace_hw_knode(tp, new, flags);
		if (err) {
			u32_destroy_key(tp, new, false);
			return err;
		}

		if (!tc_in_hw(new->flags))
			new->flags |= TCA_CLS_FLAGS_NOT_IN_HW;

		u32_replace_knode(tp, tp_c, new);
		tcf_unbind_filter(tp, &n->res);
		call_rcu(&n->rcu, u32_delete_key_rcu);
		return 0;
	}

	if (tb[TCA_U32_DIVISOR]) {
		unsigned int divisor = nla_get_u32(tb[TCA_U32_DIVISOR]);

		if (--divisor > 0x100)
			return -EINVAL;
		if (TC_U32_KEY(handle))
			return -EINVAL;
		if (handle == 0) {
			handle = gen_new_htid(tp->data);
			if (handle == 0)
				return -ENOMEM;
		}
		ht = kzalloc(sizeof(*ht) + divisor*sizeof(void *), GFP_KERNEL);
		if (ht == NULL)
			return -ENOBUFS;
		ht->tp_c = tp_c;
		ht->refcnt = 1;
		ht->divisor = divisor;
		ht->handle = handle;
		ht->prio = tp->prio;

		err = u32_replace_hw_hnode(tp, ht, flags);
		if (err) {
			kfree(ht);
			return err;
		}

		RCU_INIT_POINTER(ht->next, tp_c->hlist);
		rcu_assign_pointer(tp_c->hlist, ht);
		*arg = (unsigned long)ht;

		return 0;
	}

	if (tb[TCA_U32_HASH]) {
		htid = nla_get_u32(tb[TCA_U32_HASH]);
		if (TC_U32_HTID(htid) == TC_U32_ROOT) {
			ht = rtnl_dereference(tp->root);
			htid = ht->handle;
		} else {
			ht = u32_lookup_ht(tp->data, TC_U32_HTID(htid));
			if (ht == NULL)
				return -EINVAL;
		}
	} else {
		ht = rtnl_dereference(tp->root);
		htid = ht->handle;
	}

	if (ht->divisor < TC_U32_HASH(htid))
		return -EINVAL;

	if (handle) {
		if (TC_U32_HTID(handle) && TC_U32_HTID(handle^htid))
			return -EINVAL;
		handle = htid | TC_U32_NODE(handle);
	} else
		handle = gen_new_kid(ht, htid);

	if (tb[TCA_U32_SEL] == NULL)
		return -EINVAL;

	s = nla_data(tb[TCA_U32_SEL]);

	n = kzalloc(sizeof(*n) + s->nkeys*sizeof(struct tc_u32_key), GFP_KERNEL);
	if (n == NULL)
		return -ENOBUFS;

#ifdef CONFIG_CLS_U32_PERF
	size = sizeof(struct tc_u32_pcnt) + s->nkeys * sizeof(u64);
	n->pf = __alloc_percpu(size, __alignof__(struct tc_u32_pcnt));
	if (!n->pf) {
		kfree(n);
		return -ENOBUFS;
	}
#endif

	memcpy(&n->sel, s, sizeof(*s) + s->nkeys*sizeof(struct tc_u32_key));
	RCU_INIT_POINTER(n->ht_up, ht);
	n->handle = handle;
	n->fshift = s->hmask ? ffs(ntohl(s->hmask)) - 1 : 0;
	n->flags = flags;
	n->tp = tp;

	err = tcf_exts_init(&n->exts, TCA_U32_ACT, TCA_U32_POLICE);
	if (err < 0)
		goto errout;

#ifdef CONFIG_CLS_U32_MARK
	n->pcpu_success = alloc_percpu(u32);
	if (!n->pcpu_success) {
		err = -ENOMEM;
		goto errout;
	}

	if (tb[TCA_U32_MARK]) {
		struct tc_u32_mark *mark;

		mark = nla_data(tb[TCA_U32_MARK]);
		n->val = mark->val;
		n->mask = mark->mask;
	}
#endif

	err = u32_set_parms(net, tp, base, ht, n, tb, tca[TCA_RATE], ovr);
	if (err == 0) {
		struct tc_u_knode __rcu **ins;
		struct tc_u_knode *pins;

		err = u32_replace_hw_knode(tp, n, flags);
		if (err)
			goto errhw;

		if (!tc_in_hw(n->flags))
			n->flags |= TCA_CLS_FLAGS_NOT_IN_HW;

		ins = &ht->ht[TC_U32_HASH(handle)];
		for (pins = rtnl_dereference(*ins); pins;
		     ins = &pins->next, pins = rtnl_dereference(*ins))
			if (TC_U32_NODE(handle) < TC_U32_NODE(pins->handle))
				break;

		RCU_INIT_POINTER(n->next, pins);
		rcu_assign_pointer(*ins, n);
		*arg = (unsigned long)n;
		return 0;
	}

errhw:
#ifdef CONFIG_CLS_U32_MARK
	free_percpu(n->pcpu_success);
#endif

errout:
	tcf_exts_destroy(&n->exts);
#ifdef CONFIG_CLS_U32_PERF
	free_percpu(n->pf);
#endif
	kfree(n);
	return err;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
610
51.48%
3
7.69%
John Fastabend
226
19.07%
6
15.38%
Jamal Hadi Salim
64
5.40%
3
7.69%
Sridhar Samudrala
61
5.15%
1
2.56%
Américo Wang
49
4.14%
4
10.26%
Or Gerlitz
32
2.70%
1
2.56%
Patrick McHardy
32
2.70%
6
15.38%
Catalin(ux aka Dino) M. Boie
31
2.62%
1
2.56%
Jakub Kiciński
27
2.28%
2
5.13%
Radu Rendec
17
1.43%
2
5.13%
Benjamin LaHaise
9
0.76%
1
2.56%
Cong Wang
7
0.59%
1
2.56%
Eric Dumazet
7
0.59%
2
5.13%
Eric W. Biedermann
5
0.42%
1
2.56%
Jarek Poplawski
4
0.34%
2
5.13%
Panagiotis Issaris
2
0.17%
1
2.56%
Stephen Hemminger
1
0.08%
1
2.56%
Thomas Graf
1
0.08%
1
2.56%
Total
1185
100.00%
39
100.00%



static void u32_walk(struct tcf_proto *tp, struct tcf_walker *arg)
{
	struct tc_u_common *tp_c = tp->data;
	struct tc_u_hnode *ht;
	struct tc_u_knode *n;
	unsigned int h;

	if (arg->stop)
		return;

	for (ht = rtnl_dereference(tp_c->hlist);
	     ht;
	     ht = rtnl_dereference(ht->next)) {
		if (ht->prio != tp->prio)
			continue;
		if (arg->count >= arg->skip) {
			if (arg->fn(tp, (unsigned long)ht, arg) < 0) {
				arg->stop = 1;
				return;
			}
		}
		arg->count++;
		for (h = 0; h <= ht->divisor; h++) {
			for (n = rtnl_dereference(ht->ht[h]);
			     n;
			     n = rtnl_dereference(n->next)) {
				if (arg->count < arg->skip) {
					arg->count++;
					continue;
				}
				if (arg->fn(tp, (unsigned long)n, arg) < 0) {
					arg->stop = 1;
					return;
				}
				arg->count++;
			}
		}
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
197
89.14%
1
25.00%
John Fastabend
12
5.43%
1
25.00%
Patrick McHardy
11
4.98%
1
25.00%
Eric Dumazet
1
0.45%
1
25.00%
Total
221
100.00%
4
100.00%



static int u32_dump(struct net *net, struct tcf_proto *tp, unsigned long fh,
		    struct sk_buff *skb, struct tcmsg *t)
{
	struct tc_u_knode *n = (struct tc_u_knode *)fh;
	struct tc_u_hnode *ht_up, *ht_down;
	struct nlattr *nest;

	if (n == NULL)
		return skb->len;

	t->tcm_handle = n->handle;

	nest = nla_nest_start(skb, TCA_OPTIONS);
	if (nest == NULL)
		goto nla_put_failure;

	if (TC_U32_KEY(n->handle) == 0) {
		struct tc_u_hnode *ht = (struct tc_u_hnode *)fh;
		u32 divisor = ht->divisor + 1;

		if (nla_put_u32(skb, TCA_U32_DIVISOR, divisor))
			goto nla_put_failure;
	} else {
#ifdef CONFIG_CLS_U32_PERF
		struct tc_u32_pcnt *gpf;
		int cpu;
#endif

		if (nla_put(skb, TCA_U32_SEL,
			    sizeof(n->sel) + n->sel.nkeys*sizeof(struct tc_u32_key),
			    &n->sel))
			goto nla_put_failure;

		ht_up = rtnl_dereference(n->ht_up);
		if (ht_up) {
			u32 htid = n->handle & 0xFFFFF000;
			if (nla_put_u32(skb, TCA_U32_HASH, htid))
				goto nla_put_failure;
		}
		if (n->res.classid &&
		    nla_put_u32(skb, TCA_U32_CLASSID, n->res.classid))
			goto nla_put_failure;

		ht_down = rtnl_dereference(n->ht_down);
		if (ht_down &&
		    nla_put_u32(skb, TCA_U32_LINK, ht_down->handle))
			goto nla_put_failure;

		if (n->flags && nla_put_u32(skb, TCA_U32_FLAGS, n->flags))
			goto nla_put_failure;

#ifdef CONFIG_CLS_U32_MARK
		if ((n->val || n->mask)) {
			struct tc_u32_mark mark = {.val = n->val,
						   .mask = n->mask,
						   .success = 0};
			int cpum;

			for_each_possible_cpu(cpum) {
				__u32 cnt = *per_cpu_ptr(n->pcpu_success, cpum);

				mark.success += cnt;
			}

			if (nla_put(skb, TCA_U32_MARK, sizeof(mark), &mark))
				goto nla_put_failure;
		}
#endif

		if (tcf_exts_dump(skb, &n->exts) < 0)
			goto nla_put_failure;

#ifdef CONFIG_NET_CLS_IND
		if (n->ifindex) {
			struct net_device *dev;
			dev = __dev_get_by_index(net, n->ifindex);
			if (dev && nla_put_string(skb, TCA_U32_INDEV, dev->name))
				goto nla_put_failure;
		}
#endif
#ifdef CONFIG_CLS_U32_PERF
		gpf = kzalloc(sizeof(struct tc_u32_pcnt) +
			      n->sel.nkeys * sizeof(u64),
			      GFP_KERNEL);
		if (!gpf)
			goto nla_put_failure;

		for_each_possible_cpu(cpu) {
			int i;
			struct tc_u32_pcnt *pf = per_cpu_ptr(n->pf, cpu);

			gpf->rcnt += pf->rcnt;
			gpf->rhit += pf->rhit;
			for (i = 0; i < n->sel.nkeys; i++)
				gpf->kcnts[i] += pf->kcnts[i];
		}

		if (nla_put_64bit(skb, TCA_U32_PCNT,
				  sizeof(struct tc_u32_pcnt) +
				  n->sel.nkeys * sizeof(u64),
				  gpf, TCA_U32_PAD)) {
			kfree(gpf);
			goto nla_put_failure;
		}
		kfree(gpf);
#endif
	}

	nla_nest_end(skb, nest);

	if (TC_U32_KEY(n->handle))
		if (tcf_exts_dump_stats(skb, &n->exts) < 0)
			goto nla_put_failure;
	return skb->len;

nla_put_failure:
	nla_nest_cancel(skb, nest);
	return -1;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
John Fastabend
231
35.00%
4
21.05%
Linus Torvalds (pre-git)
222
33.64%
3
15.79%
Jamal Hadi Salim
66
10.00%
2
10.53%
David S. Miller
51
7.73%
1
5.26%
Américo Wang
28
4.24%
2
10.53%
Catalin(ux aka Dino) M. Boie
27
4.09%
1
5.26%
Patrick McHardy
21
3.18%
2
10.53%
Thomas Graf
9
1.36%
2
10.53%
Nicolas Dichtel
3
0.45%
1
5.26%
Arnaldo Carvalho de Melo
2
0.30%
1
5.26%
Total
660
100.00%
19
100.00%


static struct tcf_proto_ops cls_u32_ops __read_mostly = {
	.kind		=	"u32",
	.classify	=	u32_classify,
	.init		=	u32_init,
	.destroy	=	u32_destroy,
	.get		=	u32_get,
	.change		=	u32_change,
	.delete		=	u32_delete,
	.walk		=	u32_walk,
	.dump		=	u32_dump,
	.owner		=	THIS_MODULE,
};



static int __init init_u32(void)
{
	pr_info("u32 classifier\n");
#ifdef CONFIG_CLS_U32_PERF
	pr_info("    Performance counters on\n");
#endif
#ifdef CONFIG_NET_CLS_IND
	pr_info("    input device check on\n");
#endif
#ifdef CONFIG_NET_CLS_ACT
	pr_info("    Actions configured\n");
#endif
	return register_tcf_proto_ops(&cls_u32_ops);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jamal Hadi Salim
28
54.90%
1
16.67%
Linus Torvalds (pre-git)
13
25.49%
1
16.67%
Stephen Hemminger
4
7.84%
1
16.67%
Al Viro
3
5.88%
1
16.67%
Frans Pop
2
3.92%
1
16.67%
Ralf Hildebrandt
1
1.96%
1
16.67%
Total
51
100.00%
6
100.00%



static void __exit exit_u32(void)
{
	unregister_tcf_proto_ops(&cls_u32_ops);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
12
80.00%
1
50.00%
Al Viro
3
20.00%
1
50.00%
Total
15
100.00%
2
100.00%

module_init(init_u32)
module_exit(exit_u32)
MODULE_LICENSE("GPL");
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
2754
43.55%
4
4.60%
John Fastabend
1823
28.83%
10
11.49%
Jamal Hadi Salim
294
4.65%
4
4.60%
Américo Wang
224
3.54%
8
9.20%
Patrick McHardy
194
3.07%
10
11.49%
Cong Wang
184
2.91%
3
3.45%
Sridhar Samudrala
122
1.93%
1
1.15%
Changli Gao
116
1.83%
1
1.15%
Thomas Graf
114
1.80%
5
5.75%
Catalin(ux aka Dino) M. Boie
102
1.61%
1
1.15%
David S. Miller
98
1.55%
4
4.60%
Jakub Kiciński
60
0.95%
4
4.60%
Or Gerlitz
43
0.68%
1
1.15%
Eric Dumazet
33
0.52%
3
3.45%
Stephen Hemminger
32
0.51%
5
5.75%
Jarek Poplawski
26
0.41%
2
2.30%
Radu Rendec
20
0.32%
2
2.30%
Al Viro
16
0.25%
2
2.30%
Benjamin LaHaise
16
0.25%
1
1.15%
Arnaldo Carvalho de Melo
12
0.19%
3
3.45%
Daniel Borkmann
8
0.13%
1
1.15%
Linus Torvalds
7
0.11%
3
3.45%
Eric W. Biedermann
5
0.08%
1
1.15%
Ilpo Järvinen
5
0.08%
1
1.15%
Panagiotis Issaris
4
0.06%
1
1.15%
Tejun Heo
3
0.05%
1
1.15%
Nicolas Dichtel
3
0.05%
1
1.15%
Dan Carpenter
2
0.03%
1
1.15%
Frans Pop
2
0.03%
1
1.15%
Joe Perches
1
0.02%
1
1.15%
Ralf Hildebrandt
1
0.02%
1
1.15%
Total
6324
100.00%
87
100.00%
Directory: net/sched

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