[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, write to
 * the Free Software Foundation, 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * Please send any bug reports or fixes you make to the
 * email address(es):
 *    lksctp developers <lksctp-developers@lists.sourceforge.net>
 *
 * Or submit a bug report through the following website:
 *    http://www.sf.net/projects/lksctp
 *
 * Written or modified by:
 *    Sridhar Samudrala <sri@us.ibm.com>
 *
 * Any bugs reported given to us we will try to fix... any fixes shared will
 * be incorporated into the next SCTP release.
 */

#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((void __percpu **)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;
	    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;
	rcu_read_lock();
	list_for_each_entry_rcu(transport, &assoc->peer.transport_addr_list,
			transports) {
		addr = &transport->ipaddr;
		if (transport->dead)
			continue;

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

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;
	struct hlist_node *node;
	int    hash = *(loff_t *)v;

	if (hash >= sctp_ep_hashsize)
		return -ENOMEM;

	head = &sctp_ep_hashtable[hash];
	sctp_local_bh_disable();
	read_lock(&head->lock);
	sctp_for_each_hentry(epb, node, &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 %5d %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);
	sctp_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);
}


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

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

	if (*pos == 0)
		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\n");

	return (void *)pos;
}

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


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

	return pos;
}

/* Display sctp associations (/proc/net/sctp/assocs). */
static int sctp_assocs_seq_show(struct seq_file *seq, void *v)
{
	struct sctp_hashbucket *head;
	struct sctp_ep_common *epb;
	struct sctp_association *assoc;
	struct sock *sk;
	struct hlist_node *node;
	int    hash = *(loff_t *)v;

	if (hash >= sctp_assoc_hashsize)
		return -ENOMEM;

	head = &sctp_assoc_hashtable[hash];
	sctp_local_bh_disable();
	read_lock(&head->lock);
	sctp_for_each_hentry(epb, node, &head->chain) {
		assoc = sctp_assoc(epb);
		sk = epb->sk;
		if (!net_eq(sock_net(sk), seq_file_net(seq)))
			continue;
		seq_printf(seq,
			   "%8pK %8pK %-3d %-3d %-2d %-4d "
			   "%4d %8d %8d %7d %5lu %-5d %5d ",
			   assoc, sk, sctp_sk(sk)->type, sk->sk_state,
			   assoc->state, hash,
			   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 ",
			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);
		seq_printf(seq, "\n");
	}
	read_unlock(&head->lock);
	sctp_local_bh_enable();

	return 0;
}

static const struct seq_operations sctp_assoc_ops = {
	.start = sctp_assocs_seq_start,
	.next  = sctp_assocs_seq_next,
	.stop  = sctp_assocs_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 seq_net_private));
}

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 void *sctp_remaddr_seq_start(struct seq_file *seq, loff_t *pos)
{
	if (*pos >= sctp_assoc_hashsize)
		return NULL;

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

	if (*pos == 0)
		seq_printf(seq, "ADDR ASSOC_ID HB_ACT RTO MAX_PATH_RTX "
				"REM_ADDR_RTX  START\n");

	return (void *)pos;
}

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

	return pos;
}

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

static int sctp_remaddr_seq_show(struct seq_file *seq, void *v)
{
	struct sctp_hashbucket *head;
	struct sctp_ep_common *epb;
	struct sctp_association *assoc;
	struct hlist_node *node;
	struct sctp_transport *tsp;
	int    hash = *(loff_t *)v;

	if (hash >= sctp_assoc_hashsize)
		return -ENOMEM;

	head = &sctp_assoc_hashtable[hash];
	sctp_local_bh_disable();
	read_lock(&head->lock);
	rcu_read_lock();
	sctp_for_each_hentry(epb, node, &head->chain) {
		if (!net_eq(sock_net(epb->sk), seq_file_net(seq)))
			continue;
		assoc = sctp_assoc(epb);
		list_for_each_entry_rcu(tsp, &assoc->peer.transport_addr_list,
					transports) {
			if (tsp->dead)
				continue;

			/*
			 * 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_printf(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_printf(seq, "0");

			seq_printf(seq, "\n");
		}
	}

	rcu_read_unlock();
	read_unlock(&head->lock);
	sctp_local_bh_enable();

	return 0;

}

static const struct seq_operations sctp_remaddr_ops = {
	.start = sctp_remaddr_seq_start,
	.next  = sctp_remaddr_seq_next,
	.stop  = sctp_remaddr_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 seq_net_private));
}

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
	19	* along with GNU CC; see the file COPYING. If not, write to
	20	* the Free Software Foundation, 59 Temple Place - Suite 330,
	21	* Boston, MA 02111-1307, USA.
	22	*
	23	* Please send any bug reports or fixes you make to the
	24	* email address(es):
	25	* lksctp developers <lksctp-developers@lists.sourceforge.net>
	26	*
	27	* Or submit a bug report through the following website:
	28	* http://www.sf.net/projects/lksctp
	29	*
	30	* Written or modified by:
	31	* Sridhar Samudrala <sri@us.ibm.com>
	32	*
	33	* Any bugs reported given to us we will try to fix... any fixes shared will
	34	* be incorporated into the next SCTP release.
	35	*/
	36
	37	#include <linux/types.h>
	38	#include <linux/seq_file.h>
	39	#include <linux/init.h>
bc3b2d7f	40	#include <linux/export.h>
1da177e4	41	#include <net/sctp/sctp.h>
3f5340a6	42	#include <net/ip.h> /* for snmp_fold_field */
1da177e4	43
5833929c	44	static const struct snmp_mib sctp_snmp_list[] = {
1da177e4 LT	45	SNMP_MIB_ITEM("SctpCurrEstab", SCTP_MIB_CURRESTAB),
	46	SNMP_MIB_ITEM("SctpActiveEstabs", SCTP_MIB_ACTIVEESTABS),
	47	SNMP_MIB_ITEM("SctpPassiveEstabs", SCTP_MIB_PASSIVEESTABS),
	48	SNMP_MIB_ITEM("SctpAborteds", SCTP_MIB_ABORTEDS),
	49	SNMP_MIB_ITEM("SctpShutdowns", SCTP_MIB_SHUTDOWNS),
	50	SNMP_MIB_ITEM("SctpOutOfBlues", SCTP_MIB_OUTOFBLUES),
	51	SNMP_MIB_ITEM("SctpChecksumErrors", SCTP_MIB_CHECKSUMERRORS),
	52	SNMP_MIB_ITEM("SctpOutCtrlChunks", SCTP_MIB_OUTCTRLCHUNKS),
	53	SNMP_MIB_ITEM("SctpOutOrderChunks", SCTP_MIB_OUTORDERCHUNKS),
	54	SNMP_MIB_ITEM("SctpOutUnorderChunks", SCTP_MIB_OUTUNORDERCHUNKS),
	55	SNMP_MIB_ITEM("SctpInCtrlChunks", SCTP_MIB_INCTRLCHUNKS),
	56	SNMP_MIB_ITEM("SctpInOrderChunks", SCTP_MIB_INORDERCHUNKS),
	57	SNMP_MIB_ITEM("SctpInUnorderChunks", SCTP_MIB_INUNORDERCHUNKS),
	58	SNMP_MIB_ITEM("SctpFragUsrMsgs", SCTP_MIB_FRAGUSRMSGS),
	59	SNMP_MIB_ITEM("SctpReasmUsrMsgs", SCTP_MIB_REASMUSRMSGS),
	60	SNMP_MIB_ITEM("SctpOutSCTPPacks", SCTP_MIB_OUTSCTPPACKS),
	61	SNMP_MIB_ITEM("SctpInSCTPPacks", SCTP_MIB_INSCTPPACKS),
ac0b0462 SS	62	SNMP_MIB_ITEM("SctpT1InitExpireds", SCTP_MIB_T1_INIT_EXPIREDS),
	63	SNMP_MIB_ITEM("SctpT1CookieExpireds", SCTP_MIB_T1_COOKIE_EXPIREDS),
	64	SNMP_MIB_ITEM("SctpT2ShutdownExpireds", SCTP_MIB_T2_SHUTDOWN_EXPIREDS),
	65	SNMP_MIB_ITEM("SctpT3RtxExpireds", SCTP_MIB_T3_RTX_EXPIREDS),
	66	SNMP_MIB_ITEM("SctpT4RtoExpireds", SCTP_MIB_T4_RTO_EXPIREDS),
	67	SNMP_MIB_ITEM("SctpT5ShutdownGuardExpireds", SCTP_MIB_T5_SHUTDOWN_GUARD_EXPIREDS),
	68	SNMP_MIB_ITEM("SctpDelaySackExpireds", SCTP_MIB_DELAY_SACK_EXPIREDS),
	69	SNMP_MIB_ITEM("SctpAutocloseExpireds", SCTP_MIB_AUTOCLOSE_EXPIREDS),
	70	SNMP_MIB_ITEM("SctpT3Retransmits", SCTP_MIB_T3_RETRANSMITS),
	71	SNMP_MIB_ITEM("SctpPmtudRetransmits", SCTP_MIB_PMTUD_RETRANSMITS),
	72	SNMP_MIB_ITEM("SctpFastRetransmits", SCTP_MIB_FAST_RETRANSMITS),
	73	SNMP_MIB_ITEM("SctpInPktSoftirq", SCTP_MIB_IN_PKT_SOFTIRQ),
	74	SNMP_MIB_ITEM("SctpInPktBacklog", SCTP_MIB_IN_PKT_BACKLOG),
	75	SNMP_MIB_ITEM("SctpInPktDiscards", SCTP_MIB_IN_PKT_DISCARDS),
	76	SNMP_MIB_ITEM("SctpInDataChunkDiscards", SCTP_MIB_IN_DATA_CHUNK_DISCARDS),
d2287f84	77	SNMP_MIB_SENTINEL
1da177e4 LT	78	};
1da177e4 LT	79
1da177e4 LT	80	/* Display sctp snmp mib statistics(/proc/net/sctp/snmp). */
	81	static int sctp_snmp_seq_show(struct seq_file seq, void v)
	82	{
13d782f6	83	struct net *net = seq->private;
1da177e4 LT	84	int i;
	85
	86	for (i = 0; sctp_snmp_list[i].name != NULL; i++)
	87	seq_printf(seq, "%-32s\t%ld\n", sctp_snmp_list[i].name,
b01a2407	88	snmp_fold_field((void __percpu **)net->sctp.sctp_statistics,
1da177e4 LT	89	sctp_snmp_list[i].entry));
	90
	91	return 0;
	92	}
	93
	94	/* Initialize the seq file operations for 'snmp' object. */
	95	static int sctp_snmp_seq_open(struct inode inode, struct file file)
	96	{
13d782f6	97	return single_open_net(inode, file, sctp_snmp_seq_show);
1da177e4 LT	98	}
1da177e4 LT	99
da7071d7	100	static const struct file_operations sctp_snmp_seq_fops = {
1da177e4 LT	101	.owner = THIS_MODULE,
	102	.open = sctp_snmp_seq_open,
	103	.read = seq_read,
	104	.llseek = seq_lseek,
0da9a0c2	105	.release = single_release_net,
1da177e4 LT	106	};
	107
	108	/* Set up the proc fs entry for 'snmp' object. */
13d782f6	109	int __net_init sctp_snmp_proc_init(struct net *net)
1da177e4 LT	110	{
	111	struct proc_dir_entry *p;
	112
13d782f6 EB	113	p = proc_create("snmp", S_IRUGO, net->sctp.proc_net_sctp,
13d782f6 EB	114	&sctp_snmp_seq_fops);
1da177e4 LT	115	if (!p)
	116	return -ENOMEM;
	117
1da177e4 LT	118	return 0;
	119	}
	120
	121	/* Cleanup the proc fs entry for 'snmp' object. */
13d782f6	122	void sctp_snmp_proc_exit(struct net *net)
1da177e4	123	{
13d782f6	124	remove_proc_entry("snmp", net->sctp.proc_net_sctp);
1da177e4 LT	125	}
	126
	127	/* Dump local addresses of an association/endpoint. */
	128	static void sctp_seq_dump_local_addrs(struct seq_file seq, struct sctp_ep_common epb)
	129	{
bca735bd	130	struct sctp_association *asoc;
1da177e4	131	struct sctp_sockaddr_entry *laddr;
bca735bd VY	132	struct sctp_transport *peer;
bca735bd VY	133	union sctp_addr addr, primary = NULL;
1da177e4 LT	134	struct sctp_af *af;
1da177e4 LT	135
bca735bd VY	136	if (epb->type == SCTP_EP_TYPE_ASSOCIATION) {
	137	asoc = sctp_assoc(epb);
	138	peer = asoc->peer.primary_path;
5f242a13	139	primary = &peer->saddr;
bca735bd VY	140	}
bca735bd VY	141
0b0fe913 TG	142	rcu_read_lock();
	143	list_for_each_entry_rcu(laddr, &epb->bind_addr.address_list, list) {
	144	if (!laddr->valid)
	145	continue;
	146
5f242a13	147	addr = &laddr->a;
1da177e4	148	af = sctp_get_af_specific(addr->sa.sa_family);
bca735bd VY	149	if (primary && af->cmp_addr(addr, primary)) {
	150	seq_printf(seq, "*");
	151	}
5f242a13	152	af->seq_dump_addr(seq, addr);
1da177e4	153	}
0b0fe913	154	rcu_read_unlock();
1da177e4 LT	155	}
	156
	157	/* Dump remote addresses of an association. */
	158	static void sctp_seq_dump_remote_addrs(struct seq_file seq, struct sctp_association assoc)
	159	{
1da177e4	160	struct sctp_transport *transport;
bca735bd	161	union sctp_addr addr, primary;
1da177e4 LT	162	struct sctp_af *af;
1da177e4 LT	163
acd2bc96	164	primary = &assoc->peer.primary_addr;
45122ca2 TG	165	rcu_read_lock();
45122ca2 TG	166	list_for_each_entry_rcu(transport, &assoc->peer.transport_addr_list,
9dbc15f0	167	transports) {
5f242a13	168	addr = &transport->ipaddr;
45122ca2 TG	169	if (transport->dead)
	170	continue;
	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	177	}
45122ca2	178	rcu_read_unlock();
1da177e4 LT	179	}
1da177e4 LT	180
bca735bd VY	181	static void * sctp_eps_seq_start(struct seq_file seq, loff_t pos)
bca735bd VY	182	{
49392e5e	183	if (*pos >= sctp_ep_hashsize)
bca735bd VY	184	return NULL;
	185
	186	if (*pos < 0)
	187	*pos = 0;
	188
	189	if (*pos == 0)
	190	seq_printf(seq, " ENDPT SOCK STY SST HBKT LPORT UID INODE LADDRS\n");
	191
bca735bd VY	192	return (void *)pos;
	193	}
	194
	195	static void sctp_eps_seq_stop(struct seq_file seq, void v)
	196	{
bca735bd VY	197	}
	198
	199
	200	static void * sctp_eps_seq_next(struct seq_file seq, void v, loff_t *pos)
	201	{
49392e5e	202	if (++*pos >= sctp_ep_hashsize)
bca735bd VY	203	return NULL;
bca735bd VY	204
bca735bd VY	205	return pos;
	206	}
	207
	208
1da177e4 LT	209	/* Display sctp endpoints (/proc/net/sctp/eps). */
	210	static int sctp_eps_seq_show(struct seq_file seq, void v)
	211	{
	212	struct sctp_hashbucket *head;
	213	struct sctp_ep_common *epb;
	214	struct sctp_endpoint *ep;
	215	struct sock *sk;
d970dbf8	216	struct hlist_node *node;
38b0e42a	217	int hash = (loff_t )v;
bca735bd	218
49392e5e	219	if (hash >= sctp_ep_hashsize)
bca735bd VY	220	return -ENOMEM;
bca735bd VY	221
49392e5e	222	head = &sctp_ep_hashtable[hash];
bca735bd VY	223	sctp_local_bh_disable();
bca735bd VY	224	read_lock(&head->lock);
d970dbf8	225	sctp_for_each_hentry(epb, node, &head->chain) {
bca735bd VY	226	ep = sctp_ep(epb);
bca735bd VY	227	sk = epb->sk;
6932f119	228	if (!net_eq(sock_net(sk), seq_file_net(seq)))
13d782f6	229	continue;
71338aa7	230	seq_printf(seq, "%8pK %8pK %-3d %-3d %-4d %-5d %5d %5lu ", ep, sk,
49392e5e	231	sctp_sk(sk)->type, sk->sk_state, hash,
bca735bd	232	epb->bind_addr.port,
a7cb5a49 EB	233	from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
a7cb5a49 EB	234	sock_i_ino(sk));
bca735bd VY	235
	236	sctp_seq_dump_local_addrs(seq, epb);
	237	seq_printf(seq, "\n");
1da177e4	238	}
bca735bd VY	239	read_unlock(&head->lock);
bca735bd VY	240	sctp_local_bh_enable();
1da177e4 LT	241
	242	return 0;
	243	}
	244
56b3d975	245	static const struct seq_operations sctp_eps_ops = {
bca735bd VY	246	.start = sctp_eps_seq_start,
	247	.next = sctp_eps_seq_next,
	248	.stop = sctp_eps_seq_stop,
	249	.show = sctp_eps_seq_show,
	250	};
	251
	252
1da177e4 LT	253	/* Initialize the seq file operations for 'eps' object. */
	254	static int sctp_eps_seq_open(struct inode inode, struct file file)
	255	{
13d782f6 EB	256	return seq_open_net(inode, file, &sctp_eps_ops,
13d782f6 EB	257	sizeof(struct seq_net_private));
1da177e4 LT	258	}
1da177e4 LT	259
da7071d7	260	static const struct file_operations sctp_eps_seq_fops = {
1da177e4 LT	261	.open = sctp_eps_seq_open,
	262	.read = seq_read,
	263	.llseek = seq_lseek,
0da9a0c2	264	.release = seq_release_net,
1da177e4 LT	265	};
	266
	267	/* Set up the proc fs entry for 'eps' object. */
13d782f6	268	int __net_init sctp_eps_proc_init(struct net *net)
1da177e4 LT	269	{
	270	struct proc_dir_entry *p;
	271
13d782f6 EB	272	p = proc_create("eps", S_IRUGO, net->sctp.proc_net_sctp,
13d782f6 EB	273	&sctp_eps_seq_fops);
1da177e4 LT	274	if (!p)
	275	return -ENOMEM;
	276
1da177e4 LT	277	return 0;
	278	}
	279
	280	/* Cleanup the proc fs entry for 'eps' object. */
13d782f6	281	void sctp_eps_proc_exit(struct net *net)
1da177e4	282	{
13d782f6	283	remove_proc_entry("eps", net->sctp.proc_net_sctp);
1da177e4 LT	284	}
1da177e4 LT	285
bca735bd VY	286
	287	static void * sctp_assocs_seq_start(struct seq_file seq, loff_t pos)
	288	{
49392e5e	289	if (*pos >= sctp_assoc_hashsize)
bca735bd VY	290	return NULL;
	291
	292	if (*pos < 0)
	293	*pos = 0;
	294
	295	if (*pos == 0)
58fbbed4 NH	296	seq_printf(seq, " ASSOC SOCK STY SST ST HBKT "
	297	"ASSOC-ID TX_QUEUE RX_QUEUE UID INODE LPORT "
	298	"RPORT LADDRS <-> RADDRS "
	299	"HBINT INS OUTS MAXRT T1X T2X RTXC\n");
bca735bd	300
bca735bd VY	301	return (void *)pos;
	302	}
	303
	304	static void sctp_assocs_seq_stop(struct seq_file seq, void v)
	305	{
bca735bd VY	306	}
	307
	308
	309	static void * sctp_assocs_seq_next(struct seq_file seq, void v, loff_t *pos)
	310	{
49392e5e	311	if (++*pos >= sctp_assoc_hashsize)
bca735bd VY	312	return NULL;
bca735bd VY	313
bca735bd VY	314	return pos;
	315	}
	316
1da177e4 LT	317	/* Display sctp associations (/proc/net/sctp/assocs). */
	318	static int sctp_assocs_seq_show(struct seq_file seq, void v)
	319	{
	320	struct sctp_hashbucket *head;
	321	struct sctp_ep_common *epb;
	322	struct sctp_association *assoc;
	323	struct sock *sk;
d970dbf8	324	struct hlist_node *node;
38b0e42a	325	int hash = (loff_t )v;
bca735bd	326
49392e5e	327	if (hash >= sctp_assoc_hashsize)
bca735bd VY	328	return -ENOMEM;
bca735bd VY	329
49392e5e	330	head = &sctp_assoc_hashtable[hash];
bca735bd VY	331	sctp_local_bh_disable();
bca735bd VY	332	read_lock(&head->lock);
d970dbf8	333	sctp_for_each_hentry(epb, node, &head->chain) {
bca735bd VY	334	assoc = sctp_assoc(epb);
bca735bd VY	335	sk = epb->sk;
6932f119	336	if (!net_eq(sock_net(sk), seq_file_net(seq)))
13d782f6	337	continue;
bca735bd	338	seq_printf(seq,
71338aa7	339	"%8pK %8pK %-3d %-3d %-2d %-4d "
30e93560	340	"%4d %8d %8d %7d %5lu %-5d %5d ",
bca735bd	341	assoc, sk, sctp_sk(sk)->type, sk->sk_state,
58fbbed4 NH	342	assoc->state, hash,
58fbbed4 NH	343	assoc->assoc_id,
bca735bd	344	assoc->sndbuf_used,
6aa2551c	345	atomic_read(&assoc->rmem_alloc),
a7cb5a49 EB	346	from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
a7cb5a49 EB	347	sock_i_ino(sk),
bca735bd	348	epb->bind_addr.port,
30e93560	349	assoc->peer.port);
bca735bd VY	350	seq_printf(seq, " ");
	351	sctp_seq_dump_local_addrs(seq, epb);
	352	seq_printf(seq, "<-> ");
	353	sctp_seq_dump_remote_addrs(seq, assoc);
30e93560 NH	354	seq_printf(seq, "\t%8lu %5d %5d %4d %4d %4d %8d ",
	355	assoc->hbinterval, assoc->c.sinit_max_instreams,
	356	assoc->c.sinit_num_ostreams, assoc->max_retrans,
	357	assoc->init_retries, assoc->shutdown_retries,
	358	assoc->rtx_data_chunks);
bca735bd	359	seq_printf(seq, "\n");
1da177e4	360	}
bca735bd VY	361	read_unlock(&head->lock);
bca735bd VY	362	sctp_local_bh_enable();
1da177e4 LT	363
	364	return 0;
	365	}
	366
56b3d975	367	static const struct seq_operations sctp_assoc_ops = {
bca735bd VY	368	.start = sctp_assocs_seq_start,
	369	.next = sctp_assocs_seq_next,
	370	.stop = sctp_assocs_seq_stop,
	371	.show = sctp_assocs_seq_show,
	372	};
	373
1da177e4 LT	374	/* Initialize the seq file operations for 'assocs' object. */
	375	static int sctp_assocs_seq_open(struct inode inode, struct file file)
	376	{
13d782f6 EB	377	return seq_open_net(inode, file, &sctp_assoc_ops,
13d782f6 EB	378	sizeof(struct seq_net_private));
1da177e4 LT	379	}
1da177e4 LT	380
da7071d7	381	static const struct file_operations sctp_assocs_seq_fops = {
1da177e4 LT	382	.open = sctp_assocs_seq_open,
	383	.read = seq_read,
	384	.llseek = seq_lseek,
0da9a0c2	385	.release = seq_release_net,
1da177e4 LT	386	};
	387
	388	/* Set up the proc fs entry for 'assocs' object. */
13d782f6	389	int __net_init sctp_assocs_proc_init(struct net *net)
1da177e4 LT	390	{
	391	struct proc_dir_entry *p;
	392
13d782f6	393	p = proc_create("assocs", S_IRUGO, net->sctp.proc_net_sctp,
459eea74	394	&sctp_assocs_seq_fops);
1da177e4 LT	395	if (!p)
	396	return -ENOMEM;
	397
1da177e4 LT	398	return 0;
	399	}
	400
	401	/* Cleanup the proc fs entry for 'assocs' object. */
13d782f6	402	void sctp_assocs_proc_exit(struct net *net)
1da177e4	403	{
13d782f6	404	remove_proc_entry("assocs", net->sctp.proc_net_sctp);
1da177e4	405	}
20c2c1fd NH	406
	407	static void sctp_remaddr_seq_start(struct seq_file seq, loff_t *pos)
	408	{
	409	if (*pos >= sctp_assoc_hashsize)
	410	return NULL;
	411
	412	if (*pos < 0)
	413	*pos = 0;
	414
	415	if (*pos == 0)
	416	seq_printf(seq, "ADDR ASSOC_ID HB_ACT RTO MAX_PATH_RTX "
	417	"REM_ADDR_RTX START\n");
	418
	419	return (void *)pos;
	420	}
	421
	422	static void sctp_remaddr_seq_next(struct seq_file seq, void v, loff_t pos)
	423	{
	424	if (++*pos >= sctp_assoc_hashsize)
	425	return NULL;
	426
	427	return pos;
	428	}
	429
	430	static void sctp_remaddr_seq_stop(struct seq_file seq, void v)
	431	{
20c2c1fd NH	432	}
	433
	434	static int sctp_remaddr_seq_show(struct seq_file seq, void v)
	435	{
	436	struct sctp_hashbucket *head;
	437	struct sctp_ep_common *epb;
	438	struct sctp_association *assoc;
	439	struct hlist_node *node;
	440	struct sctp_transport *tsp;
	441	int hash = (loff_t )v;
	442
	443	if (hash >= sctp_assoc_hashsize)
	444	return -ENOMEM;
	445
	446	head = &sctp_assoc_hashtable[hash];
	447	sctp_local_bh_disable();
	448	read_lock(&head->lock);
45122ca2	449	rcu_read_lock();
20c2c1fd	450	sctp_for_each_hentry(epb, node, &head->chain) {
6932f119	451	if (!net_eq(sock_net(epb->sk), seq_file_net(seq)))
13d782f6	452	continue;
20c2c1fd	453	assoc = sctp_assoc(epb);
45122ca2	454	list_for_each_entry_rcu(tsp, &assoc->peer.transport_addr_list,
20c2c1fd	455	transports) {
45122ca2 TG	456	if (tsp->dead)
	457	continue;
	458
20c2c1fd NH	459	/*
	460	* The remote address (ADDR)
	461	*/
	462	tsp->af_specific->seq_dump_addr(seq, &tsp->ipaddr);
	463	seq_printf(seq, " ");
	464
	465	/*
	466	* The association ID (ASSOC_ID)
	467	*/
	468	seq_printf(seq, "%d ", tsp->asoc->assoc_id);
	469
	470	/*
	471	* If the Heartbeat is active (HB_ACT)
	472	* Note: 1 = Active, 0 = Inactive
	473	*/
	474	seq_printf(seq, "%d ", timer_pending(&tsp->hb_timer));
	475
	476	/*
	477	* Retransmit time out (RTO)
	478	*/
	479	seq_printf(seq, "%lu ", tsp->rto);
	480
	481	/*
	482	* Maximum path retransmit count (PATH_MAX_RTX)
	483	*/
	484	seq_printf(seq, "%d ", tsp->pathmaxrxt);
	485
	486	/*
	487	* remote address retransmit count (REM_ADDR_RTX)
	488	* Note: We don't have a way to tally this at the moment
	489	* so lets just leave it as zero for the moment
	490	*/
	491	seq_printf(seq, "0 ");
	492
	493	/*
	494	* remote address start time (START). This is also not
	495	* currently implemented, but we can record it with a
	496	* jiffies marker in a subsequent patch
	497	*/
	498	seq_printf(seq, "0");
	499
	500	seq_printf(seq, "\n");
	501	}
	502	}
	503
45122ca2	504	rcu_read_unlock();
20c2c1fd NH	505	read_unlock(&head->lock);
	506	sctp_local_bh_enable();
	507
	508	return 0;
	509
	510	}
	511
	512	static const struct seq_operations sctp_remaddr_ops = {
	513	.start = sctp_remaddr_seq_start,
	514	.next = sctp_remaddr_seq_next,
	515	.stop = sctp_remaddr_seq_stop,
	516	.show = sctp_remaddr_seq_show,
	517	};
	518
	519	/* Cleanup the proc fs entry for 'remaddr' object. */
13d782f6	520	void sctp_remaddr_proc_exit(struct net *net)
20c2c1fd	521	{
13d782f6	522	remove_proc_entry("remaddr", net->sctp.proc_net_sctp);
20c2c1fd NH	523	}
	524
	525	static int sctp_remaddr_seq_open(struct inode inode, struct file file)
	526	{
13d782f6 EB	527	return seq_open_net(inode, file, &sctp_remaddr_ops,
13d782f6 EB	528	sizeof(struct seq_net_private));
20c2c1fd NH	529	}
	530
	531	static const struct file_operations sctp_remaddr_seq_fops = {
	532	.open = sctp_remaddr_seq_open,
	533	.read = seq_read,
	534	.llseek = seq_lseek,
0da9a0c2	535	.release = seq_release_net,
20c2c1fd NH	536	};
20c2c1fd NH	537
13d782f6	538	int __net_init sctp_remaddr_proc_init(struct net *net)
20c2c1fd NH	539	{
	540	struct proc_dir_entry *p;
	541
13d782f6 EB	542	p = proc_create("remaddr", S_IRUGO, net->sctp.proc_net_sctp,
13d782f6 EB	543	&sctp_remaddr_seq_fops);
20c2c1fd NH	544	if (!p)
20c2c1fd NH	545	return -ENOMEM;
20c2c1fd NH	546	return 0;
20c2c1fd NH	547	}