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401 lines
11 KiB
401 lines
11 KiB
// 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 <[email protected]> |
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* |
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* Written or modified by: |
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* Sridhar Samudrala <[email protected]> |
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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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if (v && v != SEQ_START_TOKEN) { |
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struct sctp_transport *transport = v; |
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sctp_transport_put(transport); |
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} |
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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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if (v && v != SEQ_START_TOKEN) { |
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struct sctp_transport *transport = v; |
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sctp_transport_put(transport); |
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} |
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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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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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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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