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Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 42 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190523091649.683323110@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
394 lines
11 KiB
C
394 lines
11 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/* SCTP kernel implementation
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* Copyright (c) 2003 International Business Machines, Corp.
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*
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* This file is part of the SCTP kernel implementation
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*
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* Please send any bug reports or fixes you make to the
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* email address(es):
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* lksctp developers <linux-sctp@vger.kernel.org>
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*
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* Written or modified by:
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* Sridhar Samudrala <sri@us.ibm.com>
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*/
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#include <linux/types.h>
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#include <linux/seq_file.h>
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#include <linux/init.h>
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#include <linux/export.h>
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#include <net/sctp/sctp.h>
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#include <net/ip.h> /* for snmp_fold_field */
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static const struct snmp_mib sctp_snmp_list[] = {
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SNMP_MIB_ITEM("SctpCurrEstab", SCTP_MIB_CURRESTAB),
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SNMP_MIB_ITEM("SctpActiveEstabs", SCTP_MIB_ACTIVEESTABS),
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SNMP_MIB_ITEM("SctpPassiveEstabs", SCTP_MIB_PASSIVEESTABS),
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SNMP_MIB_ITEM("SctpAborteds", SCTP_MIB_ABORTEDS),
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SNMP_MIB_ITEM("SctpShutdowns", SCTP_MIB_SHUTDOWNS),
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SNMP_MIB_ITEM("SctpOutOfBlues", SCTP_MIB_OUTOFBLUES),
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SNMP_MIB_ITEM("SctpChecksumErrors", SCTP_MIB_CHECKSUMERRORS),
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SNMP_MIB_ITEM("SctpOutCtrlChunks", SCTP_MIB_OUTCTRLCHUNKS),
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SNMP_MIB_ITEM("SctpOutOrderChunks", SCTP_MIB_OUTORDERCHUNKS),
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SNMP_MIB_ITEM("SctpOutUnorderChunks", SCTP_MIB_OUTUNORDERCHUNKS),
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SNMP_MIB_ITEM("SctpInCtrlChunks", SCTP_MIB_INCTRLCHUNKS),
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SNMP_MIB_ITEM("SctpInOrderChunks", SCTP_MIB_INORDERCHUNKS),
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SNMP_MIB_ITEM("SctpInUnorderChunks", SCTP_MIB_INUNORDERCHUNKS),
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SNMP_MIB_ITEM("SctpFragUsrMsgs", SCTP_MIB_FRAGUSRMSGS),
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SNMP_MIB_ITEM("SctpReasmUsrMsgs", SCTP_MIB_REASMUSRMSGS),
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SNMP_MIB_ITEM("SctpOutSCTPPacks", SCTP_MIB_OUTSCTPPACKS),
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SNMP_MIB_ITEM("SctpInSCTPPacks", SCTP_MIB_INSCTPPACKS),
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SNMP_MIB_ITEM("SctpT1InitExpireds", SCTP_MIB_T1_INIT_EXPIREDS),
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SNMP_MIB_ITEM("SctpT1CookieExpireds", SCTP_MIB_T1_COOKIE_EXPIREDS),
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SNMP_MIB_ITEM("SctpT2ShutdownExpireds", SCTP_MIB_T2_SHUTDOWN_EXPIREDS),
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SNMP_MIB_ITEM("SctpT3RtxExpireds", SCTP_MIB_T3_RTX_EXPIREDS),
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SNMP_MIB_ITEM("SctpT4RtoExpireds", SCTP_MIB_T4_RTO_EXPIREDS),
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SNMP_MIB_ITEM("SctpT5ShutdownGuardExpireds", SCTP_MIB_T5_SHUTDOWN_GUARD_EXPIREDS),
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SNMP_MIB_ITEM("SctpDelaySackExpireds", SCTP_MIB_DELAY_SACK_EXPIREDS),
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SNMP_MIB_ITEM("SctpAutocloseExpireds", SCTP_MIB_AUTOCLOSE_EXPIREDS),
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SNMP_MIB_ITEM("SctpT3Retransmits", SCTP_MIB_T3_RETRANSMITS),
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SNMP_MIB_ITEM("SctpPmtudRetransmits", SCTP_MIB_PMTUD_RETRANSMITS),
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SNMP_MIB_ITEM("SctpFastRetransmits", SCTP_MIB_FAST_RETRANSMITS),
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SNMP_MIB_ITEM("SctpInPktSoftirq", SCTP_MIB_IN_PKT_SOFTIRQ),
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SNMP_MIB_ITEM("SctpInPktBacklog", SCTP_MIB_IN_PKT_BACKLOG),
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SNMP_MIB_ITEM("SctpInPktDiscards", SCTP_MIB_IN_PKT_DISCARDS),
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SNMP_MIB_ITEM("SctpInDataChunkDiscards", SCTP_MIB_IN_DATA_CHUNK_DISCARDS),
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SNMP_MIB_SENTINEL
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};
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/* Display sctp snmp mib statistics(/proc/net/sctp/snmp). */
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static int sctp_snmp_seq_show(struct seq_file *seq, void *v)
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{
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unsigned long buff[SCTP_MIB_MAX];
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struct net *net = seq->private;
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int i;
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memset(buff, 0, sizeof(unsigned long) * SCTP_MIB_MAX);
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snmp_get_cpu_field_batch(buff, sctp_snmp_list,
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net->sctp.sctp_statistics);
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for (i = 0; sctp_snmp_list[i].name; i++)
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seq_printf(seq, "%-32s\t%ld\n", sctp_snmp_list[i].name,
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buff[i]);
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return 0;
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}
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/* Dump local addresses of an association/endpoint. */
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static void sctp_seq_dump_local_addrs(struct seq_file *seq, struct sctp_ep_common *epb)
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{
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struct sctp_association *asoc;
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struct sctp_sockaddr_entry *laddr;
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struct sctp_transport *peer;
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union sctp_addr *addr, *primary = NULL;
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struct sctp_af *af;
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if (epb->type == SCTP_EP_TYPE_ASSOCIATION) {
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asoc = sctp_assoc(epb);
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peer = asoc->peer.primary_path;
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if (unlikely(peer == NULL)) {
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WARN(1, "Association %p with NULL primary path!\n", asoc);
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return;
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}
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primary = &peer->saddr;
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}
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rcu_read_lock();
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list_for_each_entry_rcu(laddr, &epb->bind_addr.address_list, list) {
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if (!laddr->valid)
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continue;
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addr = &laddr->a;
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af = sctp_get_af_specific(addr->sa.sa_family);
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if (primary && af->cmp_addr(addr, primary)) {
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seq_printf(seq, "*");
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}
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af->seq_dump_addr(seq, addr);
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}
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rcu_read_unlock();
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}
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/* Dump remote addresses of an association. */
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static void sctp_seq_dump_remote_addrs(struct seq_file *seq, struct sctp_association *assoc)
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{
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struct sctp_transport *transport;
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union sctp_addr *addr, *primary;
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struct sctp_af *af;
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primary = &assoc->peer.primary_addr;
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list_for_each_entry_rcu(transport, &assoc->peer.transport_addr_list,
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transports) {
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addr = &transport->ipaddr;
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af = sctp_get_af_specific(addr->sa.sa_family);
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if (af->cmp_addr(addr, primary)) {
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seq_printf(seq, "*");
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}
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af->seq_dump_addr(seq, addr);
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}
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}
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static void *sctp_eps_seq_start(struct seq_file *seq, loff_t *pos)
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{
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if (*pos >= sctp_ep_hashsize)
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return NULL;
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if (*pos < 0)
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*pos = 0;
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if (*pos == 0)
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seq_printf(seq, " ENDPT SOCK STY SST HBKT LPORT UID INODE LADDRS\n");
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return (void *)pos;
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}
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static void sctp_eps_seq_stop(struct seq_file *seq, void *v)
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{
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}
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static void *sctp_eps_seq_next(struct seq_file *seq, void *v, loff_t *pos)
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{
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if (++*pos >= sctp_ep_hashsize)
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return NULL;
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return pos;
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}
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/* Display sctp endpoints (/proc/net/sctp/eps). */
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static int sctp_eps_seq_show(struct seq_file *seq, void *v)
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{
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struct sctp_hashbucket *head;
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struct sctp_ep_common *epb;
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struct sctp_endpoint *ep;
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struct sock *sk;
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int hash = *(loff_t *)v;
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if (hash >= sctp_ep_hashsize)
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return -ENOMEM;
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head = &sctp_ep_hashtable[hash];
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read_lock_bh(&head->lock);
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sctp_for_each_hentry(epb, &head->chain) {
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ep = sctp_ep(epb);
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sk = epb->sk;
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if (!net_eq(sock_net(sk), seq_file_net(seq)))
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continue;
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seq_printf(seq, "%8pK %8pK %-3d %-3d %-4d %-5d %5u %5lu ", ep, sk,
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sctp_sk(sk)->type, sk->sk_state, hash,
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epb->bind_addr.port,
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from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
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sock_i_ino(sk));
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sctp_seq_dump_local_addrs(seq, epb);
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seq_printf(seq, "\n");
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}
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read_unlock_bh(&head->lock);
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return 0;
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}
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static const struct seq_operations sctp_eps_ops = {
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.start = sctp_eps_seq_start,
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.next = sctp_eps_seq_next,
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.stop = sctp_eps_seq_stop,
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.show = sctp_eps_seq_show,
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};
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struct sctp_ht_iter {
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struct seq_net_private p;
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struct rhashtable_iter hti;
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};
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static void *sctp_transport_seq_start(struct seq_file *seq, loff_t *pos)
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{
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struct sctp_ht_iter *iter = seq->private;
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sctp_transport_walk_start(&iter->hti);
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return sctp_transport_get_idx(seq_file_net(seq), &iter->hti, *pos);
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}
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static void sctp_transport_seq_stop(struct seq_file *seq, void *v)
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{
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struct sctp_ht_iter *iter = seq->private;
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sctp_transport_walk_stop(&iter->hti);
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}
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static void *sctp_transport_seq_next(struct seq_file *seq, void *v, loff_t *pos)
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{
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struct sctp_ht_iter *iter = seq->private;
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++*pos;
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return sctp_transport_get_next(seq_file_net(seq), &iter->hti);
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}
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/* Display sctp associations (/proc/net/sctp/assocs). */
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static int sctp_assocs_seq_show(struct seq_file *seq, void *v)
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{
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struct sctp_transport *transport;
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struct sctp_association *assoc;
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struct sctp_ep_common *epb;
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struct sock *sk;
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if (v == SEQ_START_TOKEN) {
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seq_printf(seq, " ASSOC SOCK STY SST ST HBKT "
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"ASSOC-ID TX_QUEUE RX_QUEUE UID INODE LPORT "
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"RPORT LADDRS <-> RADDRS "
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"HBINT INS OUTS MAXRT T1X T2X RTXC "
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"wmema wmemq sndbuf rcvbuf\n");
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return 0;
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}
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transport = (struct sctp_transport *)v;
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assoc = transport->asoc;
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epb = &assoc->base;
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sk = epb->sk;
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seq_printf(seq,
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"%8pK %8pK %-3d %-3d %-2d %-4d "
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"%4d %8d %8d %7u %5lu %-5d %5d ",
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assoc, sk, sctp_sk(sk)->type, sk->sk_state,
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assoc->state, 0,
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assoc->assoc_id,
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assoc->sndbuf_used,
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atomic_read(&assoc->rmem_alloc),
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from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
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sock_i_ino(sk),
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epb->bind_addr.port,
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assoc->peer.port);
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seq_printf(seq, " ");
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sctp_seq_dump_local_addrs(seq, epb);
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seq_printf(seq, "<-> ");
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sctp_seq_dump_remote_addrs(seq, assoc);
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seq_printf(seq, "\t%8lu %5d %5d %4d %4d %4d %8d "
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"%8d %8d %8d %8d",
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assoc->hbinterval, assoc->stream.incnt,
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assoc->stream.outcnt, assoc->max_retrans,
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assoc->init_retries, assoc->shutdown_retries,
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assoc->rtx_data_chunks,
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refcount_read(&sk->sk_wmem_alloc),
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sk->sk_wmem_queued,
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sk->sk_sndbuf,
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sk->sk_rcvbuf);
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seq_printf(seq, "\n");
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sctp_transport_put(transport);
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return 0;
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}
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static const struct seq_operations sctp_assoc_ops = {
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.start = sctp_transport_seq_start,
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.next = sctp_transport_seq_next,
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.stop = sctp_transport_seq_stop,
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.show = sctp_assocs_seq_show,
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};
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static int sctp_remaddr_seq_show(struct seq_file *seq, void *v)
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{
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struct sctp_association *assoc;
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struct sctp_transport *transport, *tsp;
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if (v == SEQ_START_TOKEN) {
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seq_printf(seq, "ADDR ASSOC_ID HB_ACT RTO MAX_PATH_RTX "
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"REM_ADDR_RTX START STATE\n");
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return 0;
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}
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transport = (struct sctp_transport *)v;
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assoc = transport->asoc;
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list_for_each_entry_rcu(tsp, &assoc->peer.transport_addr_list,
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transports) {
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/*
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* The remote address (ADDR)
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*/
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tsp->af_specific->seq_dump_addr(seq, &tsp->ipaddr);
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seq_printf(seq, " ");
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/*
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* The association ID (ASSOC_ID)
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*/
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seq_printf(seq, "%d ", tsp->asoc->assoc_id);
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/*
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* If the Heartbeat is active (HB_ACT)
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* Note: 1 = Active, 0 = Inactive
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*/
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seq_printf(seq, "%d ", timer_pending(&tsp->hb_timer));
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/*
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* Retransmit time out (RTO)
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*/
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seq_printf(seq, "%lu ", tsp->rto);
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/*
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* Maximum path retransmit count (PATH_MAX_RTX)
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*/
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seq_printf(seq, "%d ", tsp->pathmaxrxt);
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/*
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* remote address retransmit count (REM_ADDR_RTX)
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* Note: We don't have a way to tally this at the moment
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* so lets just leave it as zero for the moment
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*/
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seq_puts(seq, "0 ");
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/*
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* remote address start time (START). This is also not
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* currently implemented, but we can record it with a
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* jiffies marker in a subsequent patch
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*/
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seq_puts(seq, "0 ");
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/*
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* The current state of this destination. I.e.
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* SCTP_ACTIVE, SCTP_INACTIVE, ...
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*/
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seq_printf(seq, "%d", tsp->state);
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seq_printf(seq, "\n");
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}
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sctp_transport_put(transport);
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return 0;
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}
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static const struct seq_operations sctp_remaddr_ops = {
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.start = sctp_transport_seq_start,
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.next = sctp_transport_seq_next,
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.stop = sctp_transport_seq_stop,
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.show = sctp_remaddr_seq_show,
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};
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/* Set up the proc fs entry for the SCTP protocol. */
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int __net_init sctp_proc_init(struct net *net)
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{
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net->sctp.proc_net_sctp = proc_net_mkdir(net, "sctp", net->proc_net);
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if (!net->sctp.proc_net_sctp)
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return -ENOMEM;
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if (!proc_create_net_single("snmp", 0444, net->sctp.proc_net_sctp,
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sctp_snmp_seq_show, NULL))
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goto cleanup;
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if (!proc_create_net("eps", 0444, net->sctp.proc_net_sctp,
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&sctp_eps_ops, sizeof(struct seq_net_private)))
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goto cleanup;
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if (!proc_create_net("assocs", 0444, net->sctp.proc_net_sctp,
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&sctp_assoc_ops, sizeof(struct sctp_ht_iter)))
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goto cleanup;
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if (!proc_create_net("remaddr", 0444, net->sctp.proc_net_sctp,
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&sctp_remaddr_ops, sizeof(struct sctp_ht_iter)))
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goto cleanup;
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return 0;
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cleanup:
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remove_proc_subtree("sctp", net->proc_net);
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net->sctp.proc_net_sctp = NULL;
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return -ENOMEM;
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}
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