[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)
{
	struct net *net = seq->private;
	int i;

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

	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->c.sinit_max_instreams,
		assoc->c.sinit_num_ostreams, 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	{
13d782f6	76	struct net *net = seq->private;
1da177e4 LT	77	int i;
	78
	79	for (i = 0; sctp_snmp_list[i].name != NULL; i++)
	80	seq_printf(seq, "%-32s\t%ld\n", sctp_snmp_list[i].name,
c9f2dba6	81	snmp_fold_field(net->sctp.sctp_statistics,
1da177e4 LT	82	sctp_snmp_list[i].entry));
	83
	84	return 0;
	85	}
	86
	87	/* Initialize the seq file operations for 'snmp' object. */
	88	static int sctp_snmp_seq_open(struct inode inode, struct file file)
	89	{
13d782f6	90	return single_open_net(inode, file, sctp_snmp_seq_show);
1da177e4 LT	91	}
1da177e4 LT	92
da7071d7	93	static const struct file_operations sctp_snmp_seq_fops = {
1da177e4 LT	94	.owner = THIS_MODULE,
	95	.open = sctp_snmp_seq_open,
	96	.read = seq_read,
	97	.llseek = seq_lseek,
0da9a0c2	98	.release = single_release_net,
1da177e4 LT	99	};
	100
	101	/* Set up the proc fs entry for 'snmp' object. */
13d782f6	102	int __net_init sctp_snmp_proc_init(struct net *net)
1da177e4 LT	103	{
	104	struct proc_dir_entry *p;
	105
13d782f6 EB	106	p = proc_create("snmp", S_IRUGO, net->sctp.proc_net_sctp,
13d782f6 EB	107	&sctp_snmp_seq_fops);
1da177e4 LT	108	if (!p)
	109	return -ENOMEM;
	110
1da177e4 LT	111	return 0;
	112	}
	113
	114	/* Cleanup the proc fs entry for 'snmp' object. */
13d782f6	115	void sctp_snmp_proc_exit(struct net *net)
1da177e4	116	{
13d782f6	117	remove_proc_entry("snmp", net->sctp.proc_net_sctp);
1da177e4 LT	118	}
	119
	120	/* Dump local addresses of an association/endpoint. */
	121	static void sctp_seq_dump_local_addrs(struct seq_file seq, struct sctp_ep_common epb)
	122	{
bca735bd	123	struct sctp_association *asoc;
1da177e4	124	struct sctp_sockaddr_entry *laddr;
bca735bd VY	125	struct sctp_transport *peer;
bca735bd VY	126	union sctp_addr addr, primary = NULL;
1da177e4 LT	127	struct sctp_af *af;
1da177e4 LT	128
bca735bd	129	if (epb->type == SCTP_EP_TYPE_ASSOCIATION) {
f9e42b85 DB	130	asoc = sctp_assoc(epb);
	131
	132	peer = asoc->peer.primary_path;
	133	if (unlikely(peer == NULL)) {
b527fe69	134	WARN(1, "Association %p with NULL primary path!\n", asoc);
f9e42b85 DB	135	return;
	136	}
	137
	138	primary = &peer->saddr;
bca735bd VY	139	}
bca735bd VY	140
0b0fe913 TG	141	rcu_read_lock();
	142	list_for_each_entry_rcu(laddr, &epb->bind_addr.address_list, list) {
	143	if (!laddr->valid)
	144	continue;
	145
5f242a13	146	addr = &laddr->a;
1da177e4	147	af = sctp_get_af_specific(addr->sa.sa_family);
bca735bd VY	148	if (primary && af->cmp_addr(addr, primary)) {
	149	seq_printf(seq, "*");
	150	}
5f242a13	151	af->seq_dump_addr(seq, addr);
1da177e4	152	}
0b0fe913	153	rcu_read_unlock();
1da177e4 LT	154	}
	155
	156	/* Dump remote addresses of an association. */
	157	static void sctp_seq_dump_remote_addrs(struct seq_file seq, struct sctp_association assoc)
	158	{
1da177e4	159	struct sctp_transport *transport;
bca735bd	160	union sctp_addr addr, primary;
1da177e4 LT	161	struct sctp_af *af;
1da177e4 LT	162
acd2bc96	163	primary = &assoc->peer.primary_addr;
45122ca2	164	list_for_each_entry_rcu(transport, &assoc->peer.transport_addr_list,
9dbc15f0	165	transports) {
5f242a13	166	addr = &transport->ipaddr;
45122ca2	167
1da177e4	168	af = sctp_get_af_specific(addr->sa.sa_family);
acd2bc96	169	if (af->cmp_addr(addr, primary)) {
bca735bd VY	170	seq_printf(seq, "*");
bca735bd VY	171	}
5f242a13	172	af->seq_dump_addr(seq, addr);
1da177e4 LT	173	}
	174	}
	175
26ac8e5f	176	static void sctp_eps_seq_start(struct seq_file seq, loff_t *pos)
bca735bd	177	{
49392e5e	178	if (*pos >= sctp_ep_hashsize)
bca735bd VY	179	return NULL;
	180
	181	if (*pos < 0)
	182	*pos = 0;
	183
	184	if (*pos == 0)
	185	seq_printf(seq, " ENDPT SOCK STY SST HBKT LPORT UID INODE LADDRS\n");
	186
bca735bd VY	187	return (void *)pos;
	188	}
	189
	190	static void sctp_eps_seq_stop(struct seq_file seq, void v)
	191	{
bca735bd VY	192	}
	193
	194
26ac8e5f	195	static void sctp_eps_seq_next(struct seq_file seq, void v, loff_t pos)
bca735bd	196	{
49392e5e	197	if (++*pos >= sctp_ep_hashsize)
bca735bd VY	198	return NULL;
bca735bd VY	199
bca735bd VY	200	return pos;
	201	}
	202
	203
1da177e4 LT	204	/* Display sctp endpoints (/proc/net/sctp/eps). */
	205	static int sctp_eps_seq_show(struct seq_file seq, void v)
	206	{
	207	struct sctp_hashbucket *head;
	208	struct sctp_ep_common *epb;
	209	struct sctp_endpoint *ep;
	210	struct sock *sk;
38b0e42a	211	int hash = (loff_t )v;
bca735bd	212
49392e5e	213	if (hash >= sctp_ep_hashsize)
bca735bd VY	214	return -ENOMEM;
bca735bd VY	215
49392e5e	216	head = &sctp_ep_hashtable[hash];
79b91130	217	local_bh_disable();
bca735bd	218	read_lock(&head->lock);
b67bfe0d	219	sctp_for_each_hentry(epb, &head->chain) {
bca735bd VY	220	ep = sctp_ep(epb);
bca735bd VY	221	sk = epb->sk;
6932f119	222	if (!net_eq(sock_net(sk), seq_file_net(seq)))
13d782f6	223	continue;
d14c5ab6	224	seq_printf(seq, "%8pK %8pK %-3d %-3d %-4d %-5d %5u %5lu ", ep, sk,
49392e5e	225	sctp_sk(sk)->type, sk->sk_state, hash,
bca735bd	226	epb->bind_addr.port,
a7cb5a49 EB	227	from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
a7cb5a49 EB	228	sock_i_ino(sk));
bca735bd VY	229
	230	sctp_seq_dump_local_addrs(seq, epb);
	231	seq_printf(seq, "\n");
1da177e4	232	}
bca735bd	233	read_unlock(&head->lock);
79b91130	234	local_bh_enable();
1da177e4 LT	235
	236	return 0;
	237	}
	238
56b3d975	239	static const struct seq_operations sctp_eps_ops = {
bca735bd VY	240	.start = sctp_eps_seq_start,
	241	.next = sctp_eps_seq_next,
	242	.stop = sctp_eps_seq_stop,
	243	.show = sctp_eps_seq_show,
	244	};
	245
	246
1da177e4 LT	247	/* Initialize the seq file operations for 'eps' object. */
	248	static int sctp_eps_seq_open(struct inode inode, struct file file)
	249	{
13d782f6 EB	250	return seq_open_net(inode, file, &sctp_eps_ops,
13d782f6 EB	251	sizeof(struct seq_net_private));
1da177e4 LT	252	}
1da177e4 LT	253
da7071d7	254	static const struct file_operations sctp_eps_seq_fops = {
1da177e4 LT	255	.open = sctp_eps_seq_open,
	256	.read = seq_read,
	257	.llseek = seq_lseek,
0da9a0c2	258	.release = seq_release_net,
1da177e4 LT	259	};
	260
	261	/* Set up the proc fs entry for 'eps' object. */
13d782f6	262	int __net_init sctp_eps_proc_init(struct net *net)
1da177e4 LT	263	{
	264	struct proc_dir_entry *p;
	265
13d782f6 EB	266	p = proc_create("eps", S_IRUGO, net->sctp.proc_net_sctp,
13d782f6 EB	267	&sctp_eps_seq_fops);
1da177e4 LT	268	if (!p)
	269	return -ENOMEM;
	270
1da177e4 LT	271	return 0;
	272	}
	273
	274	/* Cleanup the proc fs entry for 'eps' object. */
13d782f6	275	void sctp_eps_proc_exit(struct net *net)
1da177e4	276	{
13d782f6	277	remove_proc_entry("eps", net->sctp.proc_net_sctp);
1da177e4 LT	278	}
1da177e4 LT	279
39f66a7d XL	280	struct sctp_ht_iter {
	281	struct seq_net_private p;
	282	struct rhashtable_iter hti;
53fa1036	283	int start_fail;
39f66a7d	284	};
bca735bd	285
b5e2f4e6	286	static void sctp_transport_seq_start(struct seq_file seq, loff_t *pos)
39f66a7d	287	{
626d16f5 XL	288	struct sctp_ht_iter *iter = seq->private;
626d16f5 XL	289	int err = sctp_transport_walk_start(&iter->hti);
39f66a7d	290
53fa1036 XL	291	if (err) {
53fa1036 XL	292	iter->start_fail = 1;
39f66a7d	293	return ERR_PTR(err);
53fa1036	294	}
39f66a7d	295
54236ab0	296	iter->start_fail = 0;
626d16f5	297	return sctp_transport_get_idx(seq_file_net(seq), &iter->hti, *pos);
39f66a7d XL	298	}
39f66a7d XL	299
b5e2f4e6	300	static void sctp_transport_seq_stop(struct seq_file seq, void v)
39f66a7d	301	{
626d16f5 XL	302	struct sctp_ht_iter *iter = seq->private;
626d16f5 XL	303
53fa1036 XL	304	if (iter->start_fail)
53fa1036 XL	305	return;
626d16f5	306	sctp_transport_walk_stop(&iter->hti);
39f66a7d	307	}
bca735bd	308
b5e2f4e6	309	static void sctp_transport_seq_next(struct seq_file seq, void v, loff_t pos)
bca735bd	310	{
626d16f5 XL	311	struct sctp_ht_iter *iter = seq->private;
626d16f5 XL	312
39f66a7d	313	++*pos;
bca735bd	314
626d16f5	315	return sctp_transport_get_next(seq_file_net(seq), &iter->hti);
bca735bd VY	316	}
bca735bd VY	317
1da177e4 LT	318	/* Display sctp associations (/proc/net/sctp/assocs). */
	319	static int sctp_assocs_seq_show(struct seq_file seq, void v)
	320	{
39f66a7d	321	struct sctp_transport *transport;
1da177e4	322	struct sctp_association *assoc;
39f66a7d	323	struct sctp_ep_common *epb;
1da177e4	324	struct sock *sk;
bca735bd	325
39f66a7d XL	326	if (v == SEQ_START_TOKEN) {
	327	seq_printf(seq, " ASSOC SOCK STY SST ST HBKT "
	328	"ASSOC-ID TX_QUEUE RX_QUEUE UID INODE LPORT "
	329	"RPORT LADDRS <-> RADDRS "
	330	"HBINT INS OUTS MAXRT T1X T2X RTXC "
	331	"wmema wmemq sndbuf rcvbuf\n");
	332	return 0;
1da177e4	333	}
39f66a7d XL	334
39f66a7d XL	335	transport = (struct sctp_transport *)v;
fba4c330 XL	336	if (!sctp_transport_hold(transport))
fba4c330 XL	337	return 0;
39f66a7d XL	338	assoc = transport->asoc;
	339	epb = &assoc->base;
	340	sk = epb->sk;
	341
	342	seq_printf(seq,
	343	"%8pK %8pK %-3d %-3d %-2d %-4d "
	344	"%4d %8d %8d %7u %5lu %-5d %5d ",
	345	assoc, sk, sctp_sk(sk)->type, sk->sk_state,
	346	assoc->state, 0,
	347	assoc->assoc_id,
	348	assoc->sndbuf_used,
	349	atomic_read(&assoc->rmem_alloc),
	350	from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
	351	sock_i_ino(sk),
	352	epb->bind_addr.port,
	353	assoc->peer.port);
	354	seq_printf(seq, " ");
	355	sctp_seq_dump_local_addrs(seq, epb);
	356	seq_printf(seq, "<-> ");
	357	sctp_seq_dump_remote_addrs(seq, assoc);
	358	seq_printf(seq, "\t%8lu %5d %5d %4d %4d %4d %8d "
	359	"%8d %8d %8d %8d",
	360	assoc->hbinterval, assoc->c.sinit_max_instreams,
	361	assoc->c.sinit_num_ostreams, assoc->max_retrans,
	362	assoc->init_retries, assoc->shutdown_retries,
	363	assoc->rtx_data_chunks,
	364	atomic_read(&sk->sk_wmem_alloc),
	365	sk->sk_wmem_queued,
	366	sk->sk_sndbuf,
	367	sk->sk_rcvbuf);
	368	seq_printf(seq, "\n");
1da177e4	369
fba4c330 XL	370	sctp_transport_put(transport);
fba4c330 XL	371
1da177e4 LT	372	return 0;
	373	}
	374
56b3d975	375	static const struct seq_operations sctp_assoc_ops = {
b5e2f4e6 XL	376	.start = sctp_transport_seq_start,
	377	.next = sctp_transport_seq_next,
	378	.stop = sctp_transport_seq_stop,
bca735bd VY	379	.show = sctp_assocs_seq_show,
	380	};
	381
1da177e4 LT	382	/* Initialize the seq file operations for 'assocs' object. */
	383	static int sctp_assocs_seq_open(struct inode inode, struct file file)
	384	{
13d782f6	385	return seq_open_net(inode, file, &sctp_assoc_ops,
39f66a7d	386	sizeof(struct sctp_ht_iter));
1da177e4 LT	387	}
1da177e4 LT	388
da7071d7	389	static const struct file_operations sctp_assocs_seq_fops = {
1da177e4 LT	390	.open = sctp_assocs_seq_open,
	391	.read = seq_read,
	392	.llseek = seq_lseek,
0da9a0c2	393	.release = seq_release_net,
1da177e4 LT	394	};
	395
	396	/* Set up the proc fs entry for 'assocs' object. */
13d782f6	397	int __net_init sctp_assocs_proc_init(struct net *net)
1da177e4 LT	398	{
	399	struct proc_dir_entry *p;
	400
13d782f6	401	p = proc_create("assocs", S_IRUGO, net->sctp.proc_net_sctp,
459eea74	402	&sctp_assocs_seq_fops);
1da177e4 LT	403	if (!p)
	404	return -ENOMEM;
	405
1da177e4 LT	406	return 0;
	407	}
	408
	409	/* Cleanup the proc fs entry for 'assocs' object. */
13d782f6	410	void sctp_assocs_proc_exit(struct net *net)
1da177e4	411	{
13d782f6	412	remove_proc_entry("assocs", net->sctp.proc_net_sctp);
1da177e4	413	}
20c2c1fd	414
20c2c1fd NH	415	static int sctp_remaddr_seq_show(struct seq_file seq, void v)
20c2c1fd NH	416	{
20c2c1fd	417	struct sctp_association *assoc;
3d73e8fa	418	struct sctp_transport transport, tsp;
20c2c1fd	419
39f66a7d XL	420	if (v == SEQ_START_TOKEN) {
	421	seq_printf(seq, "ADDR ASSOC_ID HB_ACT RTO MAX_PATH_RTX "
	422	"REM_ADDR_RTX START STATE\n");
	423	return 0;
	424	}
20c2c1fd	425
3d73e8fa XL	426	transport = (struct sctp_transport *)v;
3d73e8fa XL	427	if (!sctp_transport_hold(transport))
fba4c330	428	return 0;
3d73e8fa	429	assoc = transport->asoc;
39f66a7d XL	430
	431	list_for_each_entry_rcu(tsp, &assoc->peer.transport_addr_list,
	432	transports) {
39f66a7d XL	433	/*
	434	* The remote address (ADDR)
	435	*/
	436	tsp->af_specific->seq_dump_addr(seq, &tsp->ipaddr);
	437	seq_printf(seq, " ");
	438	/*
	439	* The association ID (ASSOC_ID)
	440	*/
	441	seq_printf(seq, "%d ", tsp->asoc->assoc_id);
	442
	443	/*
	444	* If the Heartbeat is active (HB_ACT)
	445	* Note: 1 = Active, 0 = Inactive
	446	*/
	447	seq_printf(seq, "%d ", timer_pending(&tsp->hb_timer));
	448
	449	/*
	450	* Retransmit time out (RTO)
	451	*/
	452	seq_printf(seq, "%lu ", tsp->rto);
	453
	454	/*
	455	* Maximum path retransmit count (PATH_MAX_RTX)
	456	*/
	457	seq_printf(seq, "%d ", tsp->pathmaxrxt);
	458
	459	/*
	460	* remote address retransmit count (REM_ADDR_RTX)
	461	* Note: We don't have a way to tally this at the moment
	462	* so lets just leave it as zero for the moment
	463	*/
	464	seq_puts(seq, "0 ");
	465
	466	/*
	467	* remote address start time (START). This is also not
	468	* currently implemented, but we can record it with a
	469	* jiffies marker in a subsequent patch
	470	*/
	471	seq_puts(seq, "0 ");
	472
	473	/*
	474	* The current state of this destination. I.e.
	475	* SCTP_ACTIVE, SCTP_INACTIVE, ...
	476	*/
	477	seq_printf(seq, "%d", tsp->state);
45122ca2	478
39f66a7d	479	seq_printf(seq, "\n");
20c2c1fd NH	480	}
20c2c1fd NH	481
3d73e8fa	482	sctp_transport_put(transport);
fba4c330	483
20c2c1fd	484	return 0;
20c2c1fd NH	485	}
	486
	487	static const struct seq_operations sctp_remaddr_ops = {
b5e2f4e6 XL	488	.start = sctp_transport_seq_start,
	489	.next = sctp_transport_seq_next,
	490	.stop = sctp_transport_seq_stop,
20c2c1fd NH	491	.show = sctp_remaddr_seq_show,
	492	};
	493
	494	/* Cleanup the proc fs entry for 'remaddr' object. */
13d782f6	495	void sctp_remaddr_proc_exit(struct net *net)
20c2c1fd	496	{
13d782f6	497	remove_proc_entry("remaddr", net->sctp.proc_net_sctp);
20c2c1fd NH	498	}
	499
	500	static int sctp_remaddr_seq_open(struct inode inode, struct file file)
	501	{
13d782f6	502	return seq_open_net(inode, file, &sctp_remaddr_ops,
39f66a7d	503	sizeof(struct sctp_ht_iter));
20c2c1fd NH	504	}
	505
	506	static const struct file_operations sctp_remaddr_seq_fops = {
	507	.open = sctp_remaddr_seq_open,
	508	.read = seq_read,
	509	.llseek = seq_lseek,
0da9a0c2	510	.release = seq_release_net,
20c2c1fd NH	511	};
20c2c1fd NH	512
13d782f6	513	int __net_init sctp_remaddr_proc_init(struct net *net)
20c2c1fd NH	514	{
	515	struct proc_dir_entry *p;
	516
13d782f6 EB	517	p = proc_create("remaddr", S_IRUGO, net->sctp.proc_net_sctp,
13d782f6 EB	518	&sctp_remaddr_seq_fops);
20c2c1fd NH	519	if (!p)
20c2c1fd NH	520	return -ENOMEM;
20c2c1fd NH	521	return 0;
20c2c1fd NH	522	}