![Daniel Borkmann](/assets/img/avatar_default.png)
With the restructuring of the lksctp.org site, we only allow bug reports through the SCTP mailing list linux-sctp@vger.kernel.org, not via SF, as SF is only used for web hosting and nothing more. While at it, also remove the obvious statement that bugs will be fixed and incooperated into the kernel. Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Acked-by: Vlad Yasevich <vyasevich@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
551 lines
14 KiB
C
551 lines
14 KiB
C
/* 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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* This SCTP implementation is free software;
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* you can redistribute it and/or modify it under the terms of
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* the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This SCTP implementation is distributed in the hope that it
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* will be useful, but WITHOUT ANY WARRANTY; without even the implied
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* ************************
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* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU CC; see the file COPYING. If not, write to
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* the Free Software Foundation, 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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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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struct net *net = seq->private;
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int i;
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for (i = 0; sctp_snmp_list[i].name != NULL; i++)
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seq_printf(seq, "%-32s\t%ld\n", sctp_snmp_list[i].name,
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snmp_fold_field((void __percpu **)net->sctp.sctp_statistics,
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sctp_snmp_list[i].entry));
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return 0;
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}
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/* Initialize the seq file operations for 'snmp' object. */
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static int sctp_snmp_seq_open(struct inode *inode, struct file *file)
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{
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return single_open_net(inode, file, sctp_snmp_seq_show);
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}
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static const struct file_operations sctp_snmp_seq_fops = {
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.owner = THIS_MODULE,
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.open = sctp_snmp_seq_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release_net,
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};
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/* Set up the proc fs entry for 'snmp' object. */
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int __net_init sctp_snmp_proc_init(struct net *net)
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{
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struct proc_dir_entry *p;
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p = proc_create("snmp", S_IRUGO, net->sctp.proc_net_sctp,
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&sctp_snmp_seq_fops);
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if (!p)
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return -ENOMEM;
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return 0;
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}
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/* Cleanup the proc fs entry for 'snmp' object. */
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void sctp_snmp_proc_exit(struct net *net)
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{
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remove_proc_entry("snmp", net->sctp.proc_net_sctp);
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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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rcu_read_lock();
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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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if (transport->dead)
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continue;
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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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rcu_read_unlock();
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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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sctp_local_bh_disable();
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read_lock(&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 %5d %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(&head->lock);
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sctp_local_bh_enable();
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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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/* Initialize the seq file operations for 'eps' object. */
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static int sctp_eps_seq_open(struct inode *inode, struct file *file)
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{
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return seq_open_net(inode, file, &sctp_eps_ops,
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sizeof(struct seq_net_private));
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}
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static const struct file_operations sctp_eps_seq_fops = {
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.open = sctp_eps_seq_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release_net,
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};
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/* Set up the proc fs entry for 'eps' object. */
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int __net_init sctp_eps_proc_init(struct net *net)
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{
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struct proc_dir_entry *p;
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p = proc_create("eps", S_IRUGO, net->sctp.proc_net_sctp,
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&sctp_eps_seq_fops);
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if (!p)
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return -ENOMEM;
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return 0;
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}
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/* Cleanup the proc fs entry for 'eps' object. */
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void sctp_eps_proc_exit(struct net *net)
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{
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remove_proc_entry("eps", net->sctp.proc_net_sctp);
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}
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static void * sctp_assocs_seq_start(struct seq_file *seq, loff_t *pos)
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{
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if (*pos >= sctp_assoc_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, " 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 (void *)pos;
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}
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static void sctp_assocs_seq_stop(struct seq_file *seq, void *v)
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{
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}
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static void * sctp_assocs_seq_next(struct seq_file *seq, void *v, loff_t *pos)
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{
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if (++*pos >= sctp_assoc_hashsize)
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return NULL;
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return pos;
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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_hashbucket *head;
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struct sctp_ep_common *epb;
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struct sctp_association *assoc;
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struct sock *sk;
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int hash = *(loff_t *)v;
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if (hash >= sctp_assoc_hashsize)
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return -ENOMEM;
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head = &sctp_assoc_hashtable[hash];
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sctp_local_bh_disable();
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read_lock(&head->lock);
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sctp_for_each_hentry(epb, &head->chain) {
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assoc = sctp_assoc(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,
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"%8pK %8pK %-3d %-3d %-2d %-4d "
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"%4d %8d %8d %7d %5lu %-5d %5d ",
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assoc, sk, sctp_sk(sk)->type, sk->sk_state,
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assoc->state, hash,
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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->c.sinit_max_instreams,
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assoc->c.sinit_num_ostreams, 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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atomic_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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}
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read_unlock(&head->lock);
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sctp_local_bh_enable();
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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_assocs_seq_start,
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.next = sctp_assocs_seq_next,
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.stop = sctp_assocs_seq_stop,
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.show = sctp_assocs_seq_show,
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};
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/* Initialize the seq file operations for 'assocs' object. */
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static int sctp_assocs_seq_open(struct inode *inode, struct file *file)
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{
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return seq_open_net(inode, file, &sctp_assoc_ops,
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sizeof(struct seq_net_private));
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}
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static const struct file_operations sctp_assocs_seq_fops = {
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.open = sctp_assocs_seq_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release_net,
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};
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/* Set up the proc fs entry for 'assocs' object. */
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int __net_init sctp_assocs_proc_init(struct net *net)
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{
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struct proc_dir_entry *p;
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p = proc_create("assocs", S_IRUGO, net->sctp.proc_net_sctp,
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&sctp_assocs_seq_fops);
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if (!p)
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return -ENOMEM;
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return 0;
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}
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/* Cleanup the proc fs entry for 'assocs' object. */
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void sctp_assocs_proc_exit(struct net *net)
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{
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remove_proc_entry("assocs", net->sctp.proc_net_sctp);
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}
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static void *sctp_remaddr_seq_start(struct seq_file *seq, loff_t *pos)
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{
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if (*pos >= sctp_assoc_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, "ADDR ASSOC_ID HB_ACT RTO MAX_PATH_RTX "
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"REM_ADDR_RTX START\n");
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return (void *)pos;
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}
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static void *sctp_remaddr_seq_next(struct seq_file *seq, void *v, loff_t *pos)
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{
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if (++*pos >= sctp_assoc_hashsize)
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return NULL;
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return pos;
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}
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static void sctp_remaddr_seq_stop(struct seq_file *seq, void *v)
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{
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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_hashbucket *head;
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struct sctp_ep_common *epb;
|
|
struct sctp_association *assoc;
|
|
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, &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;
|
|
}
|