diff options
Diffstat (limited to 'net/sctp/proc.c')
| -rw-r--r-- | net/sctp/proc.c | 399 |
1 files changed, 399 insertions, 0 deletions
diff --git a/net/sctp/proc.c b/net/sctp/proc.c new file mode 100644 index 000000000..ec00ee75d --- /dev/null +++ b/net/sctp/proc.c @@ -0,0 +1,399 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* SCTP kernel implementation + * Copyright (c) 2003 International Business Machines, Corp. + * + * This file is part of the SCTP kernel implementation + * + * Please send any bug reports or fixes you make to the + * email address(es): + * lksctp developers <linux-sctp@vger.kernel.org> + * + * Written or modified by: + * Sridhar Samudrala <sri@us.ibm.com> + */ + +#include <linux/types.h> +#include <linux/seq_file.h> +#include <linux/init.h> +#include <linux/export.h> +#include <net/sctp/sctp.h> +#include <net/ip.h> /* for snmp_fold_field */ + +static const struct snmp_mib sctp_snmp_list[] = { + SNMP_MIB_ITEM("SctpCurrEstab", SCTP_MIB_CURRESTAB), + SNMP_MIB_ITEM("SctpActiveEstabs", SCTP_MIB_ACTIVEESTABS), + SNMP_MIB_ITEM("SctpPassiveEstabs", SCTP_MIB_PASSIVEESTABS), + SNMP_MIB_ITEM("SctpAborteds", SCTP_MIB_ABORTEDS), + SNMP_MIB_ITEM("SctpShutdowns", SCTP_MIB_SHUTDOWNS), + SNMP_MIB_ITEM("SctpOutOfBlues", SCTP_MIB_OUTOFBLUES), + SNMP_MIB_ITEM("SctpChecksumErrors", SCTP_MIB_CHECKSUMERRORS), + SNMP_MIB_ITEM("SctpOutCtrlChunks", SCTP_MIB_OUTCTRLCHUNKS), + SNMP_MIB_ITEM("SctpOutOrderChunks", SCTP_MIB_OUTORDERCHUNKS), + SNMP_MIB_ITEM("SctpOutUnorderChunks", SCTP_MIB_OUTUNORDERCHUNKS), + SNMP_MIB_ITEM("SctpInCtrlChunks", SCTP_MIB_INCTRLCHUNKS), + SNMP_MIB_ITEM("SctpInOrderChunks", SCTP_MIB_INORDERCHUNKS), + SNMP_MIB_ITEM("SctpInUnorderChunks", SCTP_MIB_INUNORDERCHUNKS), + SNMP_MIB_ITEM("SctpFragUsrMsgs", SCTP_MIB_FRAGUSRMSGS), + SNMP_MIB_ITEM("SctpReasmUsrMsgs", SCTP_MIB_REASMUSRMSGS), + SNMP_MIB_ITEM("SctpOutSCTPPacks", SCTP_MIB_OUTSCTPPACKS), + SNMP_MIB_ITEM("SctpInSCTPPacks", SCTP_MIB_INSCTPPACKS), + SNMP_MIB_ITEM("SctpT1InitExpireds", SCTP_MIB_T1_INIT_EXPIREDS), + SNMP_MIB_ITEM("SctpT1CookieExpireds", SCTP_MIB_T1_COOKIE_EXPIREDS), + SNMP_MIB_ITEM("SctpT2ShutdownExpireds", SCTP_MIB_T2_SHUTDOWN_EXPIREDS), + SNMP_MIB_ITEM("SctpT3RtxExpireds", SCTP_MIB_T3_RTX_EXPIREDS), + SNMP_MIB_ITEM("SctpT4RtoExpireds", SCTP_MIB_T4_RTO_EXPIREDS), + SNMP_MIB_ITEM("SctpT5ShutdownGuardExpireds", SCTP_MIB_T5_SHUTDOWN_GUARD_EXPIREDS), + SNMP_MIB_ITEM("SctpDelaySackExpireds", SCTP_MIB_DELAY_SACK_EXPIREDS), + SNMP_MIB_ITEM("SctpAutocloseExpireds", SCTP_MIB_AUTOCLOSE_EXPIREDS), + SNMP_MIB_ITEM("SctpT3Retransmits", SCTP_MIB_T3_RETRANSMITS), + SNMP_MIB_ITEM("SctpPmtudRetransmits", SCTP_MIB_PMTUD_RETRANSMITS), + SNMP_MIB_ITEM("SctpFastRetransmits", SCTP_MIB_FAST_RETRANSMITS), + SNMP_MIB_ITEM("SctpInPktSoftirq", SCTP_MIB_IN_PKT_SOFTIRQ), + SNMP_MIB_ITEM("SctpInPktBacklog", SCTP_MIB_IN_PKT_BACKLOG), + SNMP_MIB_ITEM("SctpInPktDiscards", SCTP_MIB_IN_PKT_DISCARDS), + SNMP_MIB_ITEM("SctpInDataChunkDiscards", SCTP_MIB_IN_DATA_CHUNK_DISCARDS), + SNMP_MIB_SENTINEL +}; + +/* Display sctp snmp mib statistics(/proc/net/sctp/snmp). */ +static int sctp_snmp_seq_show(struct seq_file *seq, void *v) +{ + unsigned long buff[SCTP_MIB_MAX]; + struct net *net = seq->private; + int i; + + memset(buff, 0, sizeof(unsigned long) * SCTP_MIB_MAX); + + snmp_get_cpu_field_batch(buff, sctp_snmp_list, + net->sctp.sctp_statistics); + for (i = 0; sctp_snmp_list[i].name; i++) + seq_printf(seq, "%-32s\t%ld\n", sctp_snmp_list[i].name, + buff[i]); + + return 0; +} + +/* Dump local addresses of an association/endpoint. */ +static void sctp_seq_dump_local_addrs(struct seq_file *seq, struct sctp_ep_common *epb) +{ + struct sctp_association *asoc; + struct sctp_sockaddr_entry *laddr; + struct sctp_transport *peer; + union sctp_addr *addr, *primary = NULL; + struct sctp_af *af; + + if (epb->type == SCTP_EP_TYPE_ASSOCIATION) { + asoc = sctp_assoc(epb); + + peer = asoc->peer.primary_path; + if (unlikely(peer == NULL)) { + WARN(1, "Association %p with NULL primary path!\n", asoc); + return; + } + + primary = &peer->saddr; + } + + rcu_read_lock(); + list_for_each_entry_rcu(laddr, &epb->bind_addr.address_list, list) { + if (!laddr->valid) + continue; + + addr = &laddr->a; + af = sctp_get_af_specific(addr->sa.sa_family); + if (primary && af->cmp_addr(addr, primary)) { + seq_printf(seq, "*"); + } + af->seq_dump_addr(seq, addr); + } + rcu_read_unlock(); +} + +/* Dump remote addresses of an association. */ +static void sctp_seq_dump_remote_addrs(struct seq_file *seq, struct sctp_association *assoc) +{ + struct sctp_transport *transport; + union sctp_addr *addr, *primary; + struct sctp_af *af; + + primary = &assoc->peer.primary_addr; + list_for_each_entry_rcu(transport, &assoc->peer.transport_addr_list, + transports) { + addr = &transport->ipaddr; + + af = sctp_get_af_specific(addr->sa.sa_family); + if (af->cmp_addr(addr, primary)) { + seq_printf(seq, "*"); + } + af->seq_dump_addr(seq, addr); + } +} + +static void *sctp_eps_seq_start(struct seq_file *seq, loff_t *pos) +{ + if (*pos >= sctp_ep_hashsize) + return NULL; + + if (*pos < 0) + *pos = 0; + + if (*pos == 0) + seq_printf(seq, " ENDPT SOCK STY SST HBKT LPORT UID INODE LADDRS\n"); + + return (void *)pos; +} + +static void sctp_eps_seq_stop(struct seq_file *seq, void *v) +{ +} + + +static void *sctp_eps_seq_next(struct seq_file *seq, void *v, loff_t *pos) +{ + if (++*pos >= sctp_ep_hashsize) + return NULL; + + return pos; +} + + +/* Display sctp endpoints (/proc/net/sctp/eps). */ +static int sctp_eps_seq_show(struct seq_file *seq, void *v) +{ + struct sctp_hashbucket *head; + struct sctp_endpoint *ep; + struct sock *sk; + int hash = *(loff_t *)v; + + if (hash >= sctp_ep_hashsize) + return -ENOMEM; + + head = &sctp_ep_hashtable[hash]; + read_lock_bh(&head->lock); + sctp_for_each_hentry(ep, &head->chain) { + sk = ep->base.sk; + if (!net_eq(sock_net(sk), seq_file_net(seq))) + continue; + seq_printf(seq, "%8pK %8pK %-3d %-3d %-4d %-5d %5u %5lu ", ep, sk, + sctp_sk(sk)->type, sk->sk_state, hash, + ep->base.bind_addr.port, + from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)), + sock_i_ino(sk)); + + sctp_seq_dump_local_addrs(seq, &ep->base); + seq_printf(seq, "\n"); + } + read_unlock_bh(&head->lock); + + return 0; +} + +static const struct seq_operations sctp_eps_ops = { + .start = sctp_eps_seq_start, + .next = sctp_eps_seq_next, + .stop = sctp_eps_seq_stop, + .show = sctp_eps_seq_show, +}; + +struct sctp_ht_iter { + struct seq_net_private p; + struct rhashtable_iter hti; +}; + +static void *sctp_transport_seq_start(struct seq_file *seq, loff_t *pos) +{ + struct sctp_ht_iter *iter = seq->private; + + sctp_transport_walk_start(&iter->hti); + + return sctp_transport_get_idx(seq_file_net(seq), &iter->hti, *pos); +} + +static void sctp_transport_seq_stop(struct seq_file *seq, void *v) +{ + struct sctp_ht_iter *iter = seq->private; + + if (v && v != SEQ_START_TOKEN) { + struct sctp_transport *transport = v; + + sctp_transport_put(transport); + } + + sctp_transport_walk_stop(&iter->hti); +} + +static void *sctp_transport_seq_next(struct seq_file *seq, void *v, loff_t *pos) +{ + struct sctp_ht_iter *iter = seq->private; + + if (v && v != SEQ_START_TOKEN) { + struct sctp_transport *transport = v; + + sctp_transport_put(transport); + } + + ++*pos; + + return sctp_transport_get_next(seq_file_net(seq), &iter->hti); +} + +/* Display sctp associations (/proc/net/sctp/assocs). */ +static int sctp_assocs_seq_show(struct seq_file *seq, void *v) +{ + struct sctp_transport *transport; + struct sctp_association *assoc; + struct sctp_ep_common *epb; + struct sock *sk; + + if (v == SEQ_START_TOKEN) { + seq_printf(seq, " ASSOC SOCK STY SST ST HBKT " + "ASSOC-ID TX_QUEUE RX_QUEUE UID INODE LPORT " + "RPORT LADDRS <-> RADDRS " + "HBINT INS OUTS MAXRT T1X T2X RTXC " + "wmema wmemq sndbuf rcvbuf\n"); + return 0; + } + + transport = (struct sctp_transport *)v; + assoc = transport->asoc; + epb = &assoc->base; + sk = epb->sk; + + seq_printf(seq, + "%8pK %8pK %-3d %-3d %-2d %-4d " + "%4d %8d %8d %7u %5lu %-5d %5d ", + assoc, sk, sctp_sk(sk)->type, sk->sk_state, + assoc->state, 0, + assoc->assoc_id, + assoc->sndbuf_used, + atomic_read(&assoc->rmem_alloc), + from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)), + sock_i_ino(sk), + epb->bind_addr.port, + assoc->peer.port); + seq_printf(seq, " "); + sctp_seq_dump_local_addrs(seq, epb); + seq_printf(seq, "<-> "); + sctp_seq_dump_remote_addrs(seq, assoc); + seq_printf(seq, "\t%8lu %5d %5d %4d %4d %4d %8d " + "%8d %8d %8d %8d", + assoc->hbinterval, assoc->stream.incnt, + assoc->stream.outcnt, assoc->max_retrans, + assoc->init_retries, assoc->shutdown_retries, + assoc->rtx_data_chunks, + refcount_read(&sk->sk_wmem_alloc), + READ_ONCE(sk->sk_wmem_queued), + sk->sk_sndbuf, + sk->sk_rcvbuf); + seq_printf(seq, "\n"); + + return 0; +} + +static const struct seq_operations sctp_assoc_ops = { + .start = sctp_transport_seq_start, + .next = sctp_transport_seq_next, + .stop = sctp_transport_seq_stop, + .show = sctp_assocs_seq_show, +}; + +static int sctp_remaddr_seq_show(struct seq_file *seq, void *v) +{ + struct sctp_association *assoc; + struct sctp_transport *transport, *tsp; + + if (v == SEQ_START_TOKEN) { + seq_printf(seq, "ADDR ASSOC_ID HB_ACT RTO MAX_PATH_RTX " + "REM_ADDR_RTX START STATE\n"); + return 0; + } + + transport = (struct sctp_transport *)v; + assoc = transport->asoc; + + list_for_each_entry_rcu(tsp, &assoc->peer.transport_addr_list, + transports) { + /* + * The remote address (ADDR) + */ + tsp->af_specific->seq_dump_addr(seq, &tsp->ipaddr); + seq_printf(seq, " "); + /* + * The association ID (ASSOC_ID) + */ + seq_printf(seq, "%d ", tsp->asoc->assoc_id); + + /* + * If the Heartbeat is active (HB_ACT) + * Note: 1 = Active, 0 = Inactive + */ + seq_printf(seq, "%d ", timer_pending(&tsp->hb_timer)); + + /* + * Retransmit time out (RTO) + */ + seq_printf(seq, "%lu ", tsp->rto); + + /* + * Maximum path retransmit count (PATH_MAX_RTX) + */ + seq_printf(seq, "%d ", tsp->pathmaxrxt); + + /* + * remote address retransmit count (REM_ADDR_RTX) + * Note: We don't have a way to tally this at the moment + * so lets just leave it as zero for the moment + */ + seq_puts(seq, "0 "); + + /* + * remote address start time (START). This is also not + * currently implemented, but we can record it with a + * jiffies marker in a subsequent patch + */ + seq_puts(seq, "0 "); + + /* + * The current state of this destination. I.e. + * SCTP_ACTIVE, SCTP_INACTIVE, ... + */ + seq_printf(seq, "%d", tsp->state); + + seq_printf(seq, "\n"); + } + + return 0; +} + +static const struct seq_operations sctp_remaddr_ops = { + .start = sctp_transport_seq_start, + .next = sctp_transport_seq_next, + .stop = sctp_transport_seq_stop, + .show = sctp_remaddr_seq_show, +}; + +/* Set up the proc fs entry for the SCTP protocol. */ +int __net_init sctp_proc_init(struct net *net) +{ + net->sctp.proc_net_sctp = proc_net_mkdir(net, "sctp", net->proc_net); + if (!net->sctp.proc_net_sctp) + return -ENOMEM; + if (!proc_create_net_single("snmp", 0444, net->sctp.proc_net_sctp, + sctp_snmp_seq_show, NULL)) + goto cleanup; + if (!proc_create_net("eps", 0444, net->sctp.proc_net_sctp, + &sctp_eps_ops, sizeof(struct seq_net_private))) + goto cleanup; + if (!proc_create_net("assocs", 0444, net->sctp.proc_net_sctp, + &sctp_assoc_ops, sizeof(struct sctp_ht_iter))) + goto cleanup; + if (!proc_create_net("remaddr", 0444, net->sctp.proc_net_sctp, + &sctp_remaddr_ops, sizeof(struct sctp_ht_iter))) + goto cleanup; + return 0; + +cleanup: + remove_proc_subtree("sctp", net->proc_net); + net->sctp.proc_net_sctp = NULL; + return -ENOMEM; +} |