Release 4.17 net/sctp/proc.c

/* SCTP kernel implementation
 * Copyright (c) 2003 International Business Machines, Corp.
 *
 * This file is part of the SCTP kernel implementation
 *
 * This SCTP implementation 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, or (at your option)
 * any later version.
 *
 * This SCTP implementation is distributed in the hope that it
 * will be useful, but WITHOUT ANY WARRANTY; without even the implied
 *                 ************************
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with GNU CC; see the file COPYING.  If not, see
 * <http://www.gnu.org/licenses/>.
 *
 * Please send any bug reports or fixes you make to the
 * email address(es):
 *    lksctp developers <linux-sctp@vger.kernel.org>
 *
 * Written or modified by:
 *    Sridhar Samudrala <sri@us.ibm.com>
 */

#include <linux/types.h>
#include <linux/seq_file.h>
#include <linux/init.h>
#include <linux/export.h>
#include <net/sctp/sctp.h>
#include <net/ip.h> /* for snmp_fold_field */


static const struct snmp_mib sctp_snmp_list[] = {
	SNMP_MIB_ITEM("SctpCurrEstab", SCTP_MIB_CURRESTAB),
	SNMP_MIB_ITEM("SctpActiveEstabs", SCTP_MIB_ACTIVEESTABS),
	SNMP_MIB_ITEM("SctpPassiveEstabs", SCTP_MIB_PASSIVEESTABS),
	SNMP_MIB_ITEM("SctpAborteds", SCTP_MIB_ABORTEDS),
	SNMP_MIB_ITEM("SctpShutdowns", SCTP_MIB_SHUTDOWNS),
	SNMP_MIB_ITEM("SctpOutOfBlues", SCTP_MIB_OUTOFBLUES),
	SNMP_MIB_ITEM("SctpChecksumErrors", SCTP_MIB_CHECKSUMERRORS),
	SNMP_MIB_ITEM("SctpOutCtrlChunks", SCTP_MIB_OUTCTRLCHUNKS),
	SNMP_MIB_ITEM("SctpOutOrderChunks", SCTP_MIB_OUTORDERCHUNKS),
	SNMP_MIB_ITEM("SctpOutUnorderChunks", SCTP_MIB_OUTUNORDERCHUNKS),
	SNMP_MIB_ITEM("SctpInCtrlChunks", SCTP_MIB_INCTRLCHUNKS),
	SNMP_MIB_ITEM("SctpInOrderChunks", SCTP_MIB_INORDERCHUNKS),
	SNMP_MIB_ITEM("SctpInUnorderChunks", SCTP_MIB_INUNORDERCHUNKS),
	SNMP_MIB_ITEM("SctpFragUsrMsgs", SCTP_MIB_FRAGUSRMSGS),
	SNMP_MIB_ITEM("SctpReasmUsrMsgs", SCTP_MIB_REASMUSRMSGS),
	SNMP_MIB_ITEM("SctpOutSCTPPacks", SCTP_MIB_OUTSCTPPACKS),
	SNMP_MIB_ITEM("SctpInSCTPPacks", SCTP_MIB_INSCTPPACKS),
	SNMP_MIB_ITEM("SctpT1InitExpireds", SCTP_MIB_T1_INIT_EXPIREDS),
	SNMP_MIB_ITEM("SctpT1CookieExpireds", SCTP_MIB_T1_COOKIE_EXPIREDS),
	SNMP_MIB_ITEM("SctpT2ShutdownExpireds", SCTP_MIB_T2_SHUTDOWN_EXPIREDS),
	SNMP_MIB_ITEM("SctpT3RtxExpireds", SCTP_MIB_T3_RTX_EXPIREDS),
	SNMP_MIB_ITEM("SctpT4RtoExpireds", SCTP_MIB_T4_RTO_EXPIREDS),
	SNMP_MIB_ITEM("SctpT5ShutdownGuardExpireds", SCTP_MIB_T5_SHUTDOWN_GUARD_EXPIREDS),
	SNMP_MIB_ITEM("SctpDelaySackExpireds", SCTP_MIB_DELAY_SACK_EXPIREDS),
	SNMP_MIB_ITEM("SctpAutocloseExpireds", SCTP_MIB_AUTOCLOSE_EXPIREDS),
	SNMP_MIB_ITEM("SctpT3Retransmits", SCTP_MIB_T3_RETRANSMITS),
	SNMP_MIB_ITEM("SctpPmtudRetransmits", SCTP_MIB_PMTUD_RETRANSMITS),
	SNMP_MIB_ITEM("SctpFastRetransmits", SCTP_MIB_FAST_RETRANSMITS),
	SNMP_MIB_ITEM("SctpInPktSoftirq", SCTP_MIB_IN_PKT_SOFTIRQ),
	SNMP_MIB_ITEM("SctpInPktBacklog", SCTP_MIB_IN_PKT_BACKLOG),
	SNMP_MIB_ITEM("SctpInPktDiscards", SCTP_MIB_IN_PKT_DISCARDS),
	SNMP_MIB_ITEM("SctpInDataChunkDiscards", SCTP_MIB_IN_DATA_CHUNK_DISCARDS),
	SNMP_MIB_SENTINEL
};

/* Display sctp snmp mib statistics(/proc/net/sctp/snmp). */


static int sctp_snmp_seq_show(struct seq_file *seq, void *v)
{
	unsigned long buff[SCTP_MIB_MAX];
	struct net *net = seq->private;
	int i;

	memset(buff, 0, sizeof(unsigned long) * SCTP_MIB_MAX);

	snmp_get_cpu_field_batch(buff, sctp_snmp_list,
				 net->sctp.sctp_statistics);
	for (i = 0; sctp_snmp_list[i].name; i++)
		seq_printf(seq, "%-32s\t%ld\n", sctp_snmp_list[i].name,
						buff[i]);

	return 0;
}

Contributors
Person
Tokens
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CommitProp
Sridhar Samudrala
46
46.00%
1
25.00%
Jia He
36
36.00%
1
25.00%
Hideaki Yoshifuji / 吉藤英明
9
9.00%
1
25.00%
Eric W. Biedermann
9
9.00%
1
25.00%
Total
100
100.00%
4
100.00%

/* Initialize the seq file operations for 'snmp' object. */


static int sctp_snmp_seq_open(struct inode *inode, struct file *file)
{
	return single_open_net(inode, file, sctp_snmp_seq_show);
}

Contributors
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Sridhar Samudrala
23
88.46%
1
50.00%
Eric W. Biedermann
3
11.54%
1
50.00%
Total
26
100.00%
2
100.00%


static const struct file_operations sctp_snmp_seq_fops = {
	.open	 = sctp_snmp_seq_open,
	.read	 = seq_read,
	.llseek	 = seq_lseek,
	.release = single_release_net,
};

/* Dump local addresses of an association/endpoint. */


static void sctp_seq_dump_local_addrs(struct seq_file *seq, struct sctp_ep_common *epb)
{
	struct sctp_association *asoc;
	struct sctp_sockaddr_entry *laddr;
	struct sctp_transport *peer;
	union sctp_addr *addr, *primary = NULL;
	struct sctp_af *af;

	if (epb->type == SCTP_EP_TYPE_ASSOCIATION) {
		asoc = sctp_assoc(epb);

		peer = asoc->peer.primary_path;
		if (unlikely(peer == NULL)) {
			WARN(1, "Association %p with NULL primary path!\n", asoc);
			return;
		}

		primary = &peer->saddr;
	}

	rcu_read_lock();
	list_for_each_entry_rcu(laddr, &epb->bind_addr.address_list, list) {
		if (!laddr->valid)
			continue;

		addr = &laddr->a;
		af = sctp_get_af_specific(addr->sa.sa_family);
		if (primary && af->cmp_addr(addr, primary)) {
			seq_printf(seq, "*");
		}
		af->seq_dump_addr(seq, addr);
	}
	rcu_read_unlock();
}

Contributors
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CommitProp
Vladislav Yasevich
68
39.53%
1
12.50%
Sridhar Samudrala
61
35.47%
1
12.50%
Daniel Borkmann
21
12.21%
2
25.00%
Thomas Graf
15
8.72%
1
12.50%
Al Viro
3
1.74%
1
12.50%
Robert P. J. Day
3
1.74%
1
12.50%
Jon Grimm
1
0.58%
1
12.50%
Total
172
100.00%
8
100.00%

/* Dump remote addresses of an association. */


static void sctp_seq_dump_remote_addrs(struct seq_file *seq, struct sctp_association *assoc)
{
	struct sctp_transport *transport;
	union sctp_addr *addr, *primary;
	struct sctp_af *af;

	primary = &assoc->peer.primary_addr;
	list_for_each_entry_rcu(transport, &assoc->peer.transport_addr_list,
			transports) {
		addr = &transport->ipaddr;

		af = sctp_get_af_specific(addr->sa.sa_family);
		if (af->cmp_addr(addr, primary)) {
			seq_printf(seq, "*");
		}
		af->seq_dump_addr(seq, addr);
	}
}

Contributors
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Tokens
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CommitProp
Sridhar Samudrala
62
62.00%
1
16.67%
Vladislav Yasevich
30
30.00%
1
16.67%
Al Viro
4
4.00%
2
33.33%
Robert P. J. Day
3
3.00%
1
16.67%
Thomas Graf
1
1.00%
1
16.67%
Total
100
100.00%
6
100.00%



static void *sctp_eps_seq_start(struct seq_file *seq, loff_t *pos)
{
	if (*pos >= sctp_ep_hashsize)
		return NULL;

	if (*pos < 0)
		*pos = 0;

	if (*pos == 0)
		seq_printf(seq, " ENDPT     SOCK   STY SST HBKT LPORT   UID INODE LADDRS\n");

	return (void *)pos;
}

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Vladislav Yasevich
59
100.00%
2
100.00%
Total
59
100.00%
2
100.00%



static void sctp_eps_seq_stop(struct seq_file *seq, void *v)
{
}


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Vladislav Yasevich
13
92.86%
1
50.00%
Joe Perches
1
7.14%
1
50.00%
Total
14
100.00%
2
100.00%



static void *sctp_eps_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
	if (++*pos >= sctp_ep_hashsize)
		return NULL;

	return pos;
}


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Vladislav Yasevich
34
100.00%
2
100.00%
Total
34
100.00%
2
100.00%

/* Display sctp endpoints (/proc/net/sctp/eps). */


static int sctp_eps_seq_show(struct seq_file *seq, void *v)
{
	struct sctp_hashbucket *head;
	struct sctp_ep_common *epb;
	struct sctp_endpoint *ep;
	struct sock *sk;
	int    hash = *(loff_t *)v;

	if (hash >= sctp_ep_hashsize)
		return -ENOMEM;

	head = &sctp_ep_hashtable[hash];
	read_lock_bh(&head->lock);
	sctp_for_each_hentry(epb, &head->chain) {
		ep = sctp_ep(epb);
		sk = epb->sk;
		if (!net_eq(sock_net(sk), seq_file_net(seq)))
			continue;
		seq_printf(seq, "%8pK %8pK %-3d %-3d %-4d %-5d %5u %5lu ", ep, sk,
			   sctp_sk(sk)->type, sk->sk_state, hash,
			   epb->bind_addr.port,
			   from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
			   sock_i_ino(sk));

		sctp_seq_dump_local_addrs(seq, epb);
		seq_printf(seq, "\n");
	}
	read_unlock_bh(&head->lock);

	return 0;
}

Contributors
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CommitProp
Sridhar Samudrala
122
67.03%
2
16.67%
Vladislav Yasevich
31
17.03%
4
33.33%
Eric W. Biedermann
21
11.54%
2
16.67%
Ulrich Weber
4
2.20%
1
8.33%
Xin Long
2
1.10%
1
8.33%
Francesco Fusco
1
0.55%
1
8.33%
Jon Grimm
1
0.55%
1
8.33%
Total
182
100.00%
12
100.00%


static const struct seq_operations sctp_eps_ops = {
	.start = sctp_eps_seq_start,
	.next  = sctp_eps_seq_next,
	.stop  = sctp_eps_seq_stop,
	.show  = sctp_eps_seq_show,
};


/* Initialize the seq file operations for 'eps' object. */


static int sctp_eps_seq_open(struct inode *inode, struct file *file)
{
	return seq_open_net(inode, file, &sctp_eps_ops,
			    sizeof(struct seq_net_private));
}

Contributors
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CommitProp
Sridhar Samudrala
22
66.67%
1
33.33%
Eric W. Biedermann
9
27.27%
1
33.33%
Vladislav Yasevich
2
6.06%
1
33.33%
Total
33
100.00%
3
100.00%


static const struct file_operations sctp_eps_seq_fops = {
	.open	 = sctp_eps_seq_open,
	.read	 = seq_read,
	.llseek	 = seq_lseek,
	.release = seq_release_net,
};


struct sctp_ht_iter {
	
struct seq_net_private p;
	
struct rhashtable_iter hti;
	
int start_fail;
};



static void *sctp_transport_seq_start(struct seq_file *seq, loff_t *pos)
{
	struct sctp_ht_iter *iter = seq->private;

	sctp_transport_walk_start(&iter->hti);

	iter->start_fail = 0;
	return sctp_transport_get_idx(seq_file_net(seq), &iter->hti, *pos);
}

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Xin Long
35
62.50%
4
66.67%
Vladislav Yasevich
15
26.79%
1
16.67%
Vegard Nossum
6
10.71%
1
16.67%
Total
56
100.00%
6
100.00%



static void sctp_transport_seq_stop(struct seq_file *seq, void *v)
{
	struct sctp_ht_iter *iter = seq->private;

	if (iter->start_fail)
		return;
	sctp_transport_walk_stop(&iter->hti);
}

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Xin Long
27
69.23%
4
80.00%
Vladislav Yasevich
12
30.77%
1
20.00%
Total
39
100.00%
5
100.00%



static void *sctp_transport_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
	struct sctp_ht_iter *iter = seq->private;

	++*pos;

	return sctp_transport_get_next(seq_file_net(seq), &iter->hti);
}

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Vladislav Yasevich
24
51.06%
2
40.00%
Xin Long
23
48.94%
3
60.00%
Total
47
100.00%
5
100.00%

/* Display sctp associations (/proc/net/sctp/assocs). */


static int sctp_assocs_seq_show(struct seq_file *seq, void *v)
{
	struct sctp_transport *transport;
	struct sctp_association *assoc;
	struct sctp_ep_common *epb;
	struct sock *sk;

	if (v == SEQ_START_TOKEN) {
		seq_printf(seq, " ASSOC     SOCK   STY SST ST HBKT "
				"ASSOC-ID TX_QUEUE RX_QUEUE UID INODE LPORT "
				"RPORT LADDRS <-> RADDRS "
				"HBINT INS OUTS MAXRT T1X T2X RTXC "
				"wmema wmemq sndbuf rcvbuf\n");
		return 0;
	}

	transport = (struct sctp_transport *)v;
	if (!sctp_transport_hold(transport))
		return 0;
	assoc = transport->asoc;
	epb = &assoc->base;
	sk = epb->sk;

	seq_printf(seq,
		   "%8pK %8pK %-3d %-3d %-2d %-4d "
		   "%4d %8d %8d %7u %5lu %-5d %5d ",
		   assoc, sk, sctp_sk(sk)->type, sk->sk_state,
		   assoc->state, 0,
		   assoc->assoc_id,
		   assoc->sndbuf_used,
		   atomic_read(&assoc->rmem_alloc),
		   from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
		   sock_i_ino(sk),
		   epb->bind_addr.port,
		   assoc->peer.port);
	seq_printf(seq, " ");
	sctp_seq_dump_local_addrs(seq, epb);
	seq_printf(seq, "<-> ");
	sctp_seq_dump_remote_addrs(seq, assoc);
	seq_printf(seq, "\t%8lu %5d %5d %4d %4d %4d %8d "
		   "%8d %8d %8d %8d",
		assoc->hbinterval, assoc->stream.incnt,
		assoc->stream.outcnt, assoc->max_retrans,
		assoc->init_retries, assoc->shutdown_retries,
		assoc->rtx_data_chunks,
		refcount_read(&sk->sk_wmem_alloc),
		sk->sk_wmem_queued,
		sk->sk_sndbuf,
		sk->sk_rcvbuf);
	seq_printf(seq, "\n");

	sctp_transport_put(transport);

	return 0;
}

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Sridhar Samudrala
87
31.75%
2
12.50%
Xin Long
64
23.36%
4
25.00%
Neil Horman
61
22.26%
2
12.50%
Vladislav Yasevich
30
10.95%
2
12.50%
Dilip Daya
20
7.30%
1
6.25%
Eric W. Biedermann
8
2.92%
1
6.25%
Dan Rosenberg
1
0.36%
1
6.25%
Jon Grimm
1
0.36%
1
6.25%
Francesco Fusco
1
0.36%
1
6.25%
Elena Reshetova
1
0.36%
1
6.25%
Total
274
100.00%
16
100.00%


static const struct seq_operations sctp_assoc_ops = {
	.start = sctp_transport_seq_start,
	.next  = sctp_transport_seq_next,
	.stop  = sctp_transport_seq_stop,
	.show  = sctp_assocs_seq_show,
};

/* Initialize the seq file operations for 'assocs' object. */


static int sctp_assocs_seq_open(struct inode *inode, struct file *file)
{
	return seq_open_net(inode, file, &sctp_assoc_ops,
			    sizeof(struct sctp_ht_iter));
}

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Sridhar Samudrala
22
66.67%
1
25.00%
Eric W. Biedermann
8
24.24%
1
25.00%
Vladislav Yasevich
2
6.06%
1
25.00%
Xin Long
1
3.03%
1
25.00%
Total
33
100.00%
4
100.00%


static const struct file_operations sctp_assocs_seq_fops = {
	.open	 = sctp_assocs_seq_open,
	.read	 = seq_read,
	.llseek	 = seq_lseek,
	.release = seq_release_net,
};



static int sctp_remaddr_seq_show(struct seq_file *seq, void *v)
{
	struct sctp_association *assoc;
	struct sctp_transport *transport, *tsp;

	if (v == SEQ_START_TOKEN) {
		seq_printf(seq, "ADDR ASSOC_ID HB_ACT RTO MAX_PATH_RTX "
				"REM_ADDR_RTX START STATE\n");
		return 0;
	}

	transport = (struct sctp_transport *)v;
	if (!sctp_transport_hold(transport))
		return 0;
	assoc = transport->asoc;

	list_for_each_entry_rcu(tsp, &assoc->peer.transport_addr_list,
				transports) {
		/*
                 * The remote address (ADDR)
                 */
		tsp->af_specific->seq_dump_addr(seq, &tsp->ipaddr);
		seq_printf(seq, " ");
		/*
                 * The association ID (ASSOC_ID)
                 */
		seq_printf(seq, "%d ", tsp->asoc->assoc_id);

		/*
                 * If the Heartbeat is active (HB_ACT)
                 * Note: 1 = Active, 0 = Inactive
                 */
		seq_printf(seq, "%d ", timer_pending(&tsp->hb_timer));

		/*
                 * Retransmit time out (RTO)
                 */
		seq_printf(seq, "%lu ", tsp->rto);

		/*
                 * Maximum path retransmit count (PATH_MAX_RTX)
                 */
		seq_printf(seq, "%d ", tsp->pathmaxrxt);

		/*
                 * remote address retransmit count (REM_ADDR_RTX)
                 * Note: We don't have a way to tally this at the moment
                 * so lets just leave it as zero for the moment
                 */
		seq_puts(seq, "0 ");

		/*
                 * remote address start time (START).  This is also not
                 * currently implemented, but we can record it with a
                 * jiffies marker in a subsequent patch
                 */
		seq_puts(seq, "0 ");

		/*
                 * The current state of this destination. I.e.
                 * SCTP_ACTIVE, SCTP_INACTIVE, ...
                 */
		seq_printf(seq, "%d", tsp->state);

		seq_printf(seq, "\n");
	}

	sctp_transport_put(transport);

	return 0;
}

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Neil Horman
133
65.84%
1
12.50%
Xin Long
51
25.25%
3
37.50%
Michele Baldessari
14
6.93%
2
25.00%
Ulrich Weber
3
1.49%
1
12.50%
Thomas Graf
1
0.50%
1
12.50%
Total
202
100.00%
8
100.00%


static const struct seq_operations sctp_remaddr_ops = {
	.start = sctp_transport_seq_start,
	.next  = sctp_transport_seq_next,
	.stop  = sctp_transport_seq_stop,
	.show  = sctp_remaddr_seq_show,
};



static int sctp_remaddr_seq_open(struct inode *inode, struct file *file)
{
	return seq_open_net(inode, file, &sctp_remaddr_ops,
			    sizeof(struct sctp_ht_iter));
}

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Neil Horman
24
72.73%
1
33.33%
Eric W. Biedermann
8
24.24%
1
33.33%
Xin Long
1
3.03%
1
33.33%
Total
33
100.00%
3
100.00%


static const struct file_operations sctp_remaddr_seq_fops = {
	.open = sctp_remaddr_seq_open,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = seq_release_net,
};

/* Set up the proc fs entry for the SCTP protocol. */


int __net_init sctp_proc_init(struct net *net)
{
	net->sctp.proc_net_sctp = proc_net_mkdir(net, "sctp", net->proc_net);
	if (!net->sctp.proc_net_sctp)
		return -ENOMEM;
	if (!proc_create("snmp", 0444, net->sctp.proc_net_sctp,
			 &sctp_snmp_seq_fops))
		goto cleanup;
	if (!proc_create("eps", 0444, net->sctp.proc_net_sctp,
			 &sctp_eps_seq_fops))
		goto cleanup;
	if (!proc_create("assocs", 0444, net->sctp.proc_net_sctp,
			 &sctp_assocs_seq_fops))
		goto cleanup;
	if (!proc_create("remaddr", 0444, net->sctp.proc_net_sctp,
			 &sctp_remaddr_seq_fops))
		goto cleanup;
	return 0;

cleanup:
	remove_proc_subtree("sctp", net->proc_net);
	net->sctp.proc_net_sctp = NULL;
	return -ENOMEM;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Al Viro
120
77.42%
1
20.00%
Neil Horman
19
12.26%
1
20.00%
Eric W. Biedermann
9
5.81%
1
20.00%
Joe Perches
4
2.58%
1
20.00%
Alexey Dobriyan
3
1.94%
1
20.00%
Total
155
100.00%
5
100.00%

Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Sridhar Samudrala
701
34.45%
5
8.93%
Vladislav Yasevich
374
18.38%
6
10.71%
Neil Horman
289
14.20%
3
5.36%
Xin Long
226
11.11%
9
16.07%
Al Viro
128
6.29%
3
5.36%
Hideaki Yoshifuji / 吉藤英明
79
3.88%
1
1.79%
Eric W. Biedermann
75
3.69%
2
3.57%
Jia He
36
1.77%
1
1.79%
Daniel Borkmann
21
1.03%
2
3.57%
Dilip Daya
20
0.98%
1
1.79%
Thomas Graf
17
0.84%
2
3.57%
Michele Baldessari
14
0.69%
2
3.57%
Ulrich Weber
7
0.34%
1
1.79%
Vegard Nossum
6
0.29%
1
1.79%
Robert P. J. Day
6
0.29%
1
1.79%
Joe Perches
5
0.25%
2
3.57%
Pavel Emelyanov
4
0.20%
1
1.79%
Alexey Dobriyan
4
0.20%
2
3.57%
Tommi Rantala
4
0.20%
1
1.79%
Arjan van de Ven
3
0.15%
1
1.79%
Jon Grimm
3
0.15%
2
3.57%
Paul Gortmaker
3
0.15%
1
1.79%
David S. Miller
3
0.15%
1
1.79%
Philippe De Muyter
2
0.10%
1
1.79%
Francesco Fusco
2
0.10%
1
1.79%
Dan Rosenberg
1
0.05%
1
1.79%
Elena Reshetova
1
0.05%
1
1.79%
Jeff Kirsher
1
0.05%
1
1.79%
Total
2035
100.00%
56
100.00%
Directory: net/sctp

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