[mirror_ubuntu-bionic-kernel.git] / 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;
}

/* 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);
}

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

/* Set up the proc fs entry for 'snmp' object. */
int __net_init sctp_snmp_proc_init(struct net *net)
{
	struct proc_dir_entry *p;

	p = proc_create("snmp", S_IRUGO, net->sctp.proc_net_sctp,
			&sctp_snmp_seq_fops);
	if (!p)
		return -ENOMEM;

	return 0;
}

/* Cleanup the proc fs entry for 'snmp' object. */
void sctp_snmp_proc_exit(struct net *net)
{
	remove_proc_entry("snmp", net->sctp.proc_net_sctp);
}

/* 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();
}

/* 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);
	}
}

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;
}

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


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

	return pos;
}


/* 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];
	local_bh_disable();
	read_lock(&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(&head->lock);
	local_bh_enable();

	return 0;
}

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));
}

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

/* Set up the proc fs entry for 'eps' object. */
int __net_init sctp_eps_proc_init(struct net *net)
{
	struct proc_dir_entry *p;

	p = proc_create("eps", S_IRUGO, net->sctp.proc_net_sctp,
			&sctp_eps_seq_fops);
	if (!p)
		return -ENOMEM;

	return 0;
}

/* Cleanup the proc fs entry for 'eps' object. */
void sctp_eps_proc_exit(struct net *net)
{
	remove_proc_entry("eps", net->sctp.proc_net_sctp);
}

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;
	int err = sctp_transport_walk_start(&iter->hti);

	if (err) {
		iter->start_fail = 1;
		return ERR_PTR(err);
	}

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

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);
}

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);
}

/* 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,
		atomic_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;
}

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));
}

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

/* Set up the proc fs entry for 'assocs' object. */
int __net_init sctp_assocs_proc_init(struct net *net)
{
	struct proc_dir_entry *p;

	p = proc_create("assocs", S_IRUGO, net->sctp.proc_net_sctp,
			&sctp_assocs_seq_fops);
	if (!p)
		return -ENOMEM;

	return 0;
}

/* Cleanup the proc fs entry for 'assocs' object. */
void sctp_assocs_proc_exit(struct net *net)
{
	remove_proc_entry("assocs", net->sctp.proc_net_sctp);
}

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;
}

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,
};

/* Cleanup the proc fs entry for 'remaddr' object. */
void sctp_remaddr_proc_exit(struct net *net)
{
	remove_proc_entry("remaddr", net->sctp.proc_net_sctp);
}

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));
}

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

int __net_init sctp_remaddr_proc_init(struct net *net)
{
	struct proc_dir_entry *p;

	p = proc_create("remaddr", S_IRUGO, net->sctp.proc_net_sctp,
			&sctp_remaddr_seq_fops);
	if (!p)
		return -ENOMEM;
	return 0;
}
Commit	Line	Data
60c778b2	1	/* SCTP kernel implementation
1da177e4 LT	2	* Copyright (c) 2003 International Business Machines, Corp.
1da177e4 LT	3	*
60c778b2	4	* This file is part of the SCTP kernel implementation
1da177e4	5	*
60c778b2	6	* This SCTP implementation is free software;
1da177e4 LT	7	* you can redistribute it and/or modify it under the terms of
	8	* the GNU General Public License as published by
	9	* the Free Software Foundation; either version 2, or (at your option)
	10	* any later version.
	11	*
60c778b2	12	* This SCTP implementation is distributed in the hope that it
1da177e4 LT	13	* will be useful, but WITHOUT ANY WARRANTY; without even the implied
	14	* ************************
	15	* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
	16	* See the GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
4b2f13a2 JK	19	* along with GNU CC; see the file COPYING. If not, see
4b2f13a2 JK	20	* <http://www.gnu.org/licenses/>.
1da177e4 LT	21	*
	22	* Please send any bug reports or fixes you make to the
	23	* email address(es):
91705c61	24	* lksctp developers <linux-sctp@vger.kernel.org>
1da177e4	25	*
1da177e4 LT	26	* Written or modified by:
1da177e4 LT	27	* Sridhar Samudrala <sri@us.ibm.com>
1da177e4 LT	28	*/
	29
	30	#include <linux/types.h>
	31	#include <linux/seq_file.h>
	32	#include <linux/init.h>
bc3b2d7f	33	#include <linux/export.h>
1da177e4	34	#include <net/sctp/sctp.h>
3f5340a6	35	#include <net/ip.h> /* for snmp_fold_field */
1da177e4	36
5833929c	37	static const struct snmp_mib sctp_snmp_list[] = {
1da177e4 LT	38	SNMP_MIB_ITEM("SctpCurrEstab", SCTP_MIB_CURRESTAB),
	39	SNMP_MIB_ITEM("SctpActiveEstabs", SCTP_MIB_ACTIVEESTABS),
	40	SNMP_MIB_ITEM("SctpPassiveEstabs", SCTP_MIB_PASSIVEESTABS),
	41	SNMP_MIB_ITEM("SctpAborteds", SCTP_MIB_ABORTEDS),
	42	SNMP_MIB_ITEM("SctpShutdowns", SCTP_MIB_SHUTDOWNS),
	43	SNMP_MIB_ITEM("SctpOutOfBlues", SCTP_MIB_OUTOFBLUES),
	44	SNMP_MIB_ITEM("SctpChecksumErrors", SCTP_MIB_CHECKSUMERRORS),
	45	SNMP_MIB_ITEM("SctpOutCtrlChunks", SCTP_MIB_OUTCTRLCHUNKS),
	46	SNMP_MIB_ITEM("SctpOutOrderChunks", SCTP_MIB_OUTORDERCHUNKS),
	47	SNMP_MIB_ITEM("SctpOutUnorderChunks", SCTP_MIB_OUTUNORDERCHUNKS),
	48	SNMP_MIB_ITEM("SctpInCtrlChunks", SCTP_MIB_INCTRLCHUNKS),
	49	SNMP_MIB_ITEM("SctpInOrderChunks", SCTP_MIB_INORDERCHUNKS),
	50	SNMP_MIB_ITEM("SctpInUnorderChunks", SCTP_MIB_INUNORDERCHUNKS),
	51	SNMP_MIB_ITEM("SctpFragUsrMsgs", SCTP_MIB_FRAGUSRMSGS),
	52	SNMP_MIB_ITEM("SctpReasmUsrMsgs", SCTP_MIB_REASMUSRMSGS),
	53	SNMP_MIB_ITEM("SctpOutSCTPPacks", SCTP_MIB_OUTSCTPPACKS),
	54	SNMP_MIB_ITEM("SctpInSCTPPacks", SCTP_MIB_INSCTPPACKS),
ac0b0462 SS	55	SNMP_MIB_ITEM("SctpT1InitExpireds", SCTP_MIB_T1_INIT_EXPIREDS),
	56	SNMP_MIB_ITEM("SctpT1CookieExpireds", SCTP_MIB_T1_COOKIE_EXPIREDS),
	57	SNMP_MIB_ITEM("SctpT2ShutdownExpireds", SCTP_MIB_T2_SHUTDOWN_EXPIREDS),
	58	SNMP_MIB_ITEM("SctpT3RtxExpireds", SCTP_MIB_T3_RTX_EXPIREDS),
	59	SNMP_MIB_ITEM("SctpT4RtoExpireds", SCTP_MIB_T4_RTO_EXPIREDS),
	60	SNMP_MIB_ITEM("SctpT5ShutdownGuardExpireds", SCTP_MIB_T5_SHUTDOWN_GUARD_EXPIREDS),
	61	SNMP_MIB_ITEM("SctpDelaySackExpireds", SCTP_MIB_DELAY_SACK_EXPIREDS),
	62	SNMP_MIB_ITEM("SctpAutocloseExpireds", SCTP_MIB_AUTOCLOSE_EXPIREDS),
	63	SNMP_MIB_ITEM("SctpT3Retransmits", SCTP_MIB_T3_RETRANSMITS),
	64	SNMP_MIB_ITEM("SctpPmtudRetransmits", SCTP_MIB_PMTUD_RETRANSMITS),
	65	SNMP_MIB_ITEM("SctpFastRetransmits", SCTP_MIB_FAST_RETRANSMITS),
	66	SNMP_MIB_ITEM("SctpInPktSoftirq", SCTP_MIB_IN_PKT_SOFTIRQ),
	67	SNMP_MIB_ITEM("SctpInPktBacklog", SCTP_MIB_IN_PKT_BACKLOG),
	68	SNMP_MIB_ITEM("SctpInPktDiscards", SCTP_MIB_IN_PKT_DISCARDS),
	69	SNMP_MIB_ITEM("SctpInDataChunkDiscards", SCTP_MIB_IN_DATA_CHUNK_DISCARDS),
d2287f84	70	SNMP_MIB_SENTINEL
1da177e4 LT	71	};
1da177e4 LT	72
1da177e4 LT	73	/* Display sctp snmp mib statistics(/proc/net/sctp/snmp). */
	74	static int sctp_snmp_seq_show(struct seq_file seq, void v)
	75	{
7d64a94b	76	unsigned long buff[SCTP_MIB_MAX];
13d782f6	77	struct net *net = seq->private;
1da177e4 LT	78	int i;
1da177e4 LT	79
7d64a94b JH	80	memset(buff, 0, sizeof(unsigned long) * SCTP_MIB_MAX);
	81
	82	snmp_get_cpu_field_batch(buff, sctp_snmp_list,
	83	net->sctp.sctp_statistics);
6d4a741c	84	for (i = 0; sctp_snmp_list[i].name; i++)
1da177e4	85	seq_printf(seq, "%-32s\t%ld\n", sctp_snmp_list[i].name,
7d64a94b	86	buff[i]);
1da177e4 LT	87
	88	return 0;
	89	}
	90
	91	/* Initialize the seq file operations for 'snmp' object. */
	92	static int sctp_snmp_seq_open(struct inode inode, struct file file)
	93	{
13d782f6	94	return single_open_net(inode, file, sctp_snmp_seq_show);
1da177e4 LT	95	}
1da177e4 LT	96
da7071d7	97	static const struct file_operations sctp_snmp_seq_fops = {
1da177e4 LT	98	.owner = THIS_MODULE,
	99	.open = sctp_snmp_seq_open,
	100	.read = seq_read,
	101	.llseek = seq_lseek,
0da9a0c2	102	.release = single_release_net,
1da177e4 LT	103	};
	104
	105	/* Set up the proc fs entry for 'snmp' object. */
13d782f6	106	int __net_init sctp_snmp_proc_init(struct net *net)
1da177e4 LT	107	{
	108	struct proc_dir_entry *p;
	109
13d782f6 EB	110	p = proc_create("snmp", S_IRUGO, net->sctp.proc_net_sctp,
13d782f6 EB	111	&sctp_snmp_seq_fops);
1da177e4 LT	112	if (!p)
	113	return -ENOMEM;
	114
1da177e4 LT	115	return 0;
	116	}
	117
	118	/* Cleanup the proc fs entry for 'snmp' object. */
13d782f6	119	void sctp_snmp_proc_exit(struct net *net)
1da177e4	120	{
13d782f6	121	remove_proc_entry("snmp", net->sctp.proc_net_sctp);
1da177e4 LT	122	}
	123
	124	/* Dump local addresses of an association/endpoint. */
	125	static void sctp_seq_dump_local_addrs(struct seq_file seq, struct sctp_ep_common epb)
	126	{
bca735bd	127	struct sctp_association *asoc;
1da177e4	128	struct sctp_sockaddr_entry *laddr;
bca735bd VY	129	struct sctp_transport *peer;
bca735bd VY	130	union sctp_addr addr, primary = NULL;
1da177e4 LT	131	struct sctp_af *af;
1da177e4 LT	132
bca735bd	133	if (epb->type == SCTP_EP_TYPE_ASSOCIATION) {
f9e42b85 DB	134	asoc = sctp_assoc(epb);
	135
	136	peer = asoc->peer.primary_path;
	137	if (unlikely(peer == NULL)) {
b527fe69	138	WARN(1, "Association %p with NULL primary path!\n", asoc);
f9e42b85 DB	139	return;
	140	}
	141
	142	primary = &peer->saddr;
bca735bd VY	143	}
bca735bd VY	144
0b0fe913 TG	145	rcu_read_lock();
	146	list_for_each_entry_rcu(laddr, &epb->bind_addr.address_list, list) {
	147	if (!laddr->valid)
	148	continue;
	149
5f242a13	150	addr = &laddr->a;
1da177e4	151	af = sctp_get_af_specific(addr->sa.sa_family);
bca735bd VY	152	if (primary && af->cmp_addr(addr, primary)) {
	153	seq_printf(seq, "*");
	154	}
5f242a13	155	af->seq_dump_addr(seq, addr);
1da177e4	156	}
0b0fe913	157	rcu_read_unlock();
1da177e4 LT	158	}
	159
	160	/* Dump remote addresses of an association. */
	161	static void sctp_seq_dump_remote_addrs(struct seq_file seq, struct sctp_association assoc)
	162	{
1da177e4	163	struct sctp_transport *transport;
bca735bd	164	union sctp_addr addr, primary;
1da177e4 LT	165	struct sctp_af *af;
1da177e4 LT	166
acd2bc96	167	primary = &assoc->peer.primary_addr;
45122ca2	168	list_for_each_entry_rcu(transport, &assoc->peer.transport_addr_list,
9dbc15f0	169	transports) {
5f242a13	170	addr = &transport->ipaddr;
45122ca2	171
1da177e4	172	af = sctp_get_af_specific(addr->sa.sa_family);
acd2bc96	173	if (af->cmp_addr(addr, primary)) {
bca735bd VY	174	seq_printf(seq, "*");
bca735bd VY	175	}
5f242a13	176	af->seq_dump_addr(seq, addr);
1da177e4 LT	177	}
	178	}
	179
26ac8e5f	180	static void sctp_eps_seq_start(struct seq_file seq, loff_t *pos)
bca735bd	181	{
49392e5e	182	if (*pos >= sctp_ep_hashsize)
bca735bd VY	183	return NULL;
	184
	185	if (*pos < 0)
	186	*pos = 0;
	187
	188	if (*pos == 0)
	189	seq_printf(seq, " ENDPT SOCK STY SST HBKT LPORT UID INODE LADDRS\n");
	190
bca735bd VY	191	return (void *)pos;
	192	}
	193
	194	static void sctp_eps_seq_stop(struct seq_file seq, void v)
	195	{
bca735bd VY	196	}
	197
	198
26ac8e5f	199	static void sctp_eps_seq_next(struct seq_file seq, void v, loff_t pos)
bca735bd	200	{
49392e5e	201	if (++*pos >= sctp_ep_hashsize)
bca735bd VY	202	return NULL;
bca735bd VY	203
bca735bd VY	204	return pos;
	205	}
	206
	207
1da177e4 LT	208	/* Display sctp endpoints (/proc/net/sctp/eps). */
	209	static int sctp_eps_seq_show(struct seq_file seq, void v)
	210	{
	211	struct sctp_hashbucket *head;
	212	struct sctp_ep_common *epb;
	213	struct sctp_endpoint *ep;
	214	struct sock *sk;
38b0e42a	215	int hash = (loff_t )v;
bca735bd	216
49392e5e	217	if (hash >= sctp_ep_hashsize)
bca735bd VY	218	return -ENOMEM;
bca735bd VY	219
49392e5e	220	head = &sctp_ep_hashtable[hash];
79b91130	221	local_bh_disable();
bca735bd	222	read_lock(&head->lock);
b67bfe0d	223	sctp_for_each_hentry(epb, &head->chain) {
bca735bd VY	224	ep = sctp_ep(epb);
bca735bd VY	225	sk = epb->sk;
6932f119	226	if (!net_eq(sock_net(sk), seq_file_net(seq)))
13d782f6	227	continue;
d14c5ab6	228	seq_printf(seq, "%8pK %8pK %-3d %-3d %-4d %-5d %5u %5lu ", ep, sk,
49392e5e	229	sctp_sk(sk)->type, sk->sk_state, hash,
bca735bd	230	epb->bind_addr.port,
a7cb5a49 EB	231	from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
a7cb5a49 EB	232	sock_i_ino(sk));
bca735bd VY	233
	234	sctp_seq_dump_local_addrs(seq, epb);
	235	seq_printf(seq, "\n");
1da177e4	236	}
bca735bd	237	read_unlock(&head->lock);
79b91130	238	local_bh_enable();
1da177e4 LT	239
	240	return 0;
	241	}
	242
56b3d975	243	static const struct seq_operations sctp_eps_ops = {
bca735bd VY	244	.start = sctp_eps_seq_start,
	245	.next = sctp_eps_seq_next,
	246	.stop = sctp_eps_seq_stop,
	247	.show = sctp_eps_seq_show,
	248	};
	249
	250
1da177e4 LT	251	/* Initialize the seq file operations for 'eps' object. */
	252	static int sctp_eps_seq_open(struct inode inode, struct file file)
	253	{
13d782f6 EB	254	return seq_open_net(inode, file, &sctp_eps_ops,
13d782f6 EB	255	sizeof(struct seq_net_private));
1da177e4 LT	256	}
1da177e4 LT	257
da7071d7	258	static const struct file_operations sctp_eps_seq_fops = {
1da177e4 LT	259	.open = sctp_eps_seq_open,
	260	.read = seq_read,
	261	.llseek = seq_lseek,
0da9a0c2	262	.release = seq_release_net,
1da177e4 LT	263	};
	264
	265	/* Set up the proc fs entry for 'eps' object. */
13d782f6	266	int __net_init sctp_eps_proc_init(struct net *net)
1da177e4 LT	267	{
	268	struct proc_dir_entry *p;
	269
13d782f6 EB	270	p = proc_create("eps", S_IRUGO, net->sctp.proc_net_sctp,
13d782f6 EB	271	&sctp_eps_seq_fops);
1da177e4 LT	272	if (!p)
	273	return -ENOMEM;
	274
1da177e4 LT	275	return 0;
	276	}
	277
	278	/* Cleanup the proc fs entry for 'eps' object. */
13d782f6	279	void sctp_eps_proc_exit(struct net *net)
1da177e4	280	{
13d782f6	281	remove_proc_entry("eps", net->sctp.proc_net_sctp);
1da177e4 LT	282	}
1da177e4 LT	283
39f66a7d XL	284	struct sctp_ht_iter {
	285	struct seq_net_private p;
	286	struct rhashtable_iter hti;
53fa1036	287	int start_fail;
39f66a7d	288	};
bca735bd	289
b5e2f4e6	290	static void sctp_transport_seq_start(struct seq_file seq, loff_t *pos)
39f66a7d	291	{
626d16f5 XL	292	struct sctp_ht_iter *iter = seq->private;
626d16f5 XL	293	int err = sctp_transport_walk_start(&iter->hti);
39f66a7d	294
53fa1036 XL	295	if (err) {
53fa1036 XL	296	iter->start_fail = 1;
39f66a7d	297	return ERR_PTR(err);
53fa1036	298	}
39f66a7d	299
54236ab0	300	iter->start_fail = 0;
626d16f5	301	return sctp_transport_get_idx(seq_file_net(seq), &iter->hti, *pos);
39f66a7d XL	302	}
39f66a7d XL	303
b5e2f4e6	304	static void sctp_transport_seq_stop(struct seq_file seq, void v)
39f66a7d	305	{
626d16f5 XL	306	struct sctp_ht_iter *iter = seq->private;
626d16f5 XL	307
53fa1036 XL	308	if (iter->start_fail)
53fa1036 XL	309	return;
626d16f5	310	sctp_transport_walk_stop(&iter->hti);
39f66a7d	311	}
bca735bd	312
b5e2f4e6	313	static void sctp_transport_seq_next(struct seq_file seq, void v, loff_t pos)
bca735bd	314	{
626d16f5 XL	315	struct sctp_ht_iter *iter = seq->private;
626d16f5 XL	316
39f66a7d	317	++*pos;
bca735bd	318
626d16f5	319	return sctp_transport_get_next(seq_file_net(seq), &iter->hti);
bca735bd VY	320	}
bca735bd VY	321
1da177e4 LT	322	/* Display sctp associations (/proc/net/sctp/assocs). */
	323	static int sctp_assocs_seq_show(struct seq_file seq, void v)
	324	{
39f66a7d	325	struct sctp_transport *transport;
1da177e4	326	struct sctp_association *assoc;
39f66a7d	327	struct sctp_ep_common *epb;
1da177e4	328	struct sock *sk;
bca735bd	329
39f66a7d XL	330	if (v == SEQ_START_TOKEN) {
	331	seq_printf(seq, " ASSOC SOCK STY SST ST HBKT "
	332	"ASSOC-ID TX_QUEUE RX_QUEUE UID INODE LPORT "
	333	"RPORT LADDRS <-> RADDRS "
	334	"HBINT INS OUTS MAXRT T1X T2X RTXC "
	335	"wmema wmemq sndbuf rcvbuf\n");
	336	return 0;
1da177e4	337	}
39f66a7d XL	338
39f66a7d XL	339	transport = (struct sctp_transport *)v;
fba4c330 XL	340	if (!sctp_transport_hold(transport))
fba4c330 XL	341	return 0;
39f66a7d XL	342	assoc = transport->asoc;
	343	epb = &assoc->base;
	344	sk = epb->sk;
	345
	346	seq_printf(seq,
	347	"%8pK %8pK %-3d %-3d %-2d %-4d "
	348	"%4d %8d %8d %7u %5lu %-5d %5d ",
	349	assoc, sk, sctp_sk(sk)->type, sk->sk_state,
	350	assoc->state, 0,
	351	assoc->assoc_id,
	352	assoc->sndbuf_used,
	353	atomic_read(&assoc->rmem_alloc),
	354	from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
	355	sock_i_ino(sk),
	356	epb->bind_addr.port,
	357	assoc->peer.port);
	358	seq_printf(seq, " ");
	359	sctp_seq_dump_local_addrs(seq, epb);
	360	seq_printf(seq, "<-> ");
	361	sctp_seq_dump_remote_addrs(seq, assoc);
	362	seq_printf(seq, "\t%8lu %5d %5d %4d %4d %4d %8d "
	363	"%8d %8d %8d %8d",
afe89962 XL	364	assoc->hbinterval, assoc->stream->incnt,
afe89962 XL	365	assoc->stream->outcnt, assoc->max_retrans,
39f66a7d XL	366	assoc->init_retries, assoc->shutdown_retries,
	367	assoc->rtx_data_chunks,
	368	atomic_read(&sk->sk_wmem_alloc),
	369	sk->sk_wmem_queued,
	370	sk->sk_sndbuf,
	371	sk->sk_rcvbuf);
	372	seq_printf(seq, "\n");
1da177e4	373
fba4c330 XL	374	sctp_transport_put(transport);
fba4c330 XL	375
1da177e4 LT	376	return 0;
	377	}
	378
56b3d975	379	static const struct seq_operations sctp_assoc_ops = {
b5e2f4e6 XL	380	.start = sctp_transport_seq_start,
	381	.next = sctp_transport_seq_next,
	382	.stop = sctp_transport_seq_stop,
bca735bd VY	383	.show = sctp_assocs_seq_show,
	384	};
	385
1da177e4 LT	386	/* Initialize the seq file operations for 'assocs' object. */
	387	static int sctp_assocs_seq_open(struct inode inode, struct file file)
	388	{
13d782f6	389	return seq_open_net(inode, file, &sctp_assoc_ops,
39f66a7d	390	sizeof(struct sctp_ht_iter));
1da177e4 LT	391	}
1da177e4 LT	392
da7071d7	393	static const struct file_operations sctp_assocs_seq_fops = {
1da177e4 LT	394	.open = sctp_assocs_seq_open,
	395	.read = seq_read,
	396	.llseek = seq_lseek,
0da9a0c2	397	.release = seq_release_net,
1da177e4 LT	398	};
	399
	400	/* Set up the proc fs entry for 'assocs' object. */
13d782f6	401	int __net_init sctp_assocs_proc_init(struct net *net)
1da177e4 LT	402	{
	403	struct proc_dir_entry *p;
	404
13d782f6	405	p = proc_create("assocs", S_IRUGO, net->sctp.proc_net_sctp,
459eea74	406	&sctp_assocs_seq_fops);
1da177e4 LT	407	if (!p)
	408	return -ENOMEM;
	409
1da177e4 LT	410	return 0;
	411	}
	412
	413	/* Cleanup the proc fs entry for 'assocs' object. */
13d782f6	414	void sctp_assocs_proc_exit(struct net *net)
1da177e4	415	{
13d782f6	416	remove_proc_entry("assocs", net->sctp.proc_net_sctp);
1da177e4	417	}
20c2c1fd	418
20c2c1fd NH	419	static int sctp_remaddr_seq_show(struct seq_file seq, void v)
20c2c1fd NH	420	{
20c2c1fd	421	struct sctp_association *assoc;
3d73e8fa	422	struct sctp_transport transport, tsp;
20c2c1fd	423
39f66a7d XL	424	if (v == SEQ_START_TOKEN) {
	425	seq_printf(seq, "ADDR ASSOC_ID HB_ACT RTO MAX_PATH_RTX "
	426	"REM_ADDR_RTX START STATE\n");
	427	return 0;
	428	}
20c2c1fd	429
3d73e8fa XL	430	transport = (struct sctp_transport *)v;
3d73e8fa XL	431	if (!sctp_transport_hold(transport))
fba4c330	432	return 0;
3d73e8fa	433	assoc = transport->asoc;
39f66a7d XL	434
	435	list_for_each_entry_rcu(tsp, &assoc->peer.transport_addr_list,
	436	transports) {
39f66a7d XL	437	/*
	438	* The remote address (ADDR)
	439	*/
	440	tsp->af_specific->seq_dump_addr(seq, &tsp->ipaddr);
	441	seq_printf(seq, " ");
	442	/*
	443	* The association ID (ASSOC_ID)
	444	*/
	445	seq_printf(seq, "%d ", tsp->asoc->assoc_id);
	446
	447	/*
	448	* If the Heartbeat is active (HB_ACT)
	449	* Note: 1 = Active, 0 = Inactive
	450	*/
	451	seq_printf(seq, "%d ", timer_pending(&tsp->hb_timer));
	452
	453	/*
	454	* Retransmit time out (RTO)
	455	*/
	456	seq_printf(seq, "%lu ", tsp->rto);
	457
	458	/*
	459	* Maximum path retransmit count (PATH_MAX_RTX)
	460	*/
	461	seq_printf(seq, "%d ", tsp->pathmaxrxt);
	462
	463	/*
	464	* remote address retransmit count (REM_ADDR_RTX)
	465	* Note: We don't have a way to tally this at the moment
	466	* so lets just leave it as zero for the moment
	467	*/
	468	seq_puts(seq, "0 ");
	469
	470	/*
	471	* remote address start time (START). This is also not
	472	* currently implemented, but we can record it with a
	473	* jiffies marker in a subsequent patch
	474	*/
	475	seq_puts(seq, "0 ");
	476
	477	/*
	478	* The current state of this destination. I.e.
	479	* SCTP_ACTIVE, SCTP_INACTIVE, ...
	480	*/
	481	seq_printf(seq, "%d", tsp->state);
45122ca2	482
39f66a7d	483	seq_printf(seq, "\n");
20c2c1fd NH	484	}
20c2c1fd NH	485
3d73e8fa	486	sctp_transport_put(transport);
fba4c330	487
20c2c1fd	488	return 0;
20c2c1fd NH	489	}
	490
	491	static const struct seq_operations sctp_remaddr_ops = {
b5e2f4e6 XL	492	.start = sctp_transport_seq_start,
	493	.next = sctp_transport_seq_next,
	494	.stop = sctp_transport_seq_stop,
20c2c1fd NH	495	.show = sctp_remaddr_seq_show,
	496	};
	497
	498	/* Cleanup the proc fs entry for 'remaddr' object. */
13d782f6	499	void sctp_remaddr_proc_exit(struct net *net)
20c2c1fd	500	{
13d782f6	501	remove_proc_entry("remaddr", net->sctp.proc_net_sctp);
20c2c1fd NH	502	}
	503
	504	static int sctp_remaddr_seq_open(struct inode inode, struct file file)
	505	{
13d782f6	506	return seq_open_net(inode, file, &sctp_remaddr_ops,
39f66a7d	507	sizeof(struct sctp_ht_iter));
20c2c1fd NH	508	}
	509
	510	static const struct file_operations sctp_remaddr_seq_fops = {
	511	.open = sctp_remaddr_seq_open,
	512	.read = seq_read,
	513	.llseek = seq_lseek,
0da9a0c2	514	.release = seq_release_net,
20c2c1fd NH	515	};
20c2c1fd NH	516
13d782f6	517	int __net_init sctp_remaddr_proc_init(struct net *net)
20c2c1fd NH	518	{
	519	struct proc_dir_entry *p;
	520
13d782f6 EB	521	p = proc_create("remaddr", S_IRUGO, net->sctp.proc_net_sctp,
13d782f6 EB	522	&sctp_remaddr_seq_fops);
20c2c1fd NH	523	if (!p)
20c2c1fd NH	524	return -ENOMEM;
20c2c1fd NH	525	return 0;
20c2c1fd NH	526	}