Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /* SCTP kernel implementation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Copyright (c) 2003 International Business Machines, Corp.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * This file is part of the SCTP kernel implementation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * Please send any bug reports or fixes you make to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  * email address(es):
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  *    lksctp developers <linux-sctp@vger.kernel.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  * Written or modified by:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12)  *    Sridhar Samudrala <sri@us.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/seq_file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <net/sctp/sctp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <net/ip.h> /* for snmp_fold_field */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) static const struct snmp_mib sctp_snmp_list[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 	SNMP_MIB_ITEM("SctpCurrEstab", SCTP_MIB_CURRESTAB),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 	SNMP_MIB_ITEM("SctpActiveEstabs", SCTP_MIB_ACTIVEESTABS),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 	SNMP_MIB_ITEM("SctpPassiveEstabs", SCTP_MIB_PASSIVEESTABS),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 	SNMP_MIB_ITEM("SctpAborteds", SCTP_MIB_ABORTEDS),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	SNMP_MIB_ITEM("SctpShutdowns", SCTP_MIB_SHUTDOWNS),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	SNMP_MIB_ITEM("SctpOutOfBlues", SCTP_MIB_OUTOFBLUES),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	SNMP_MIB_ITEM("SctpChecksumErrors", SCTP_MIB_CHECKSUMERRORS),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	SNMP_MIB_ITEM("SctpOutCtrlChunks", SCTP_MIB_OUTCTRLCHUNKS),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	SNMP_MIB_ITEM("SctpOutOrderChunks", SCTP_MIB_OUTORDERCHUNKS),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	SNMP_MIB_ITEM("SctpOutUnorderChunks", SCTP_MIB_OUTUNORDERCHUNKS),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	SNMP_MIB_ITEM("SctpInCtrlChunks", SCTP_MIB_INCTRLCHUNKS),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	SNMP_MIB_ITEM("SctpInOrderChunks", SCTP_MIB_INORDERCHUNKS),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	SNMP_MIB_ITEM("SctpInUnorderChunks", SCTP_MIB_INUNORDERCHUNKS),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	SNMP_MIB_ITEM("SctpFragUsrMsgs", SCTP_MIB_FRAGUSRMSGS),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	SNMP_MIB_ITEM("SctpReasmUsrMsgs", SCTP_MIB_REASMUSRMSGS),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	SNMP_MIB_ITEM("SctpOutSCTPPacks", SCTP_MIB_OUTSCTPPACKS),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	SNMP_MIB_ITEM("SctpInSCTPPacks", SCTP_MIB_INSCTPPACKS),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	SNMP_MIB_ITEM("SctpT1InitExpireds", SCTP_MIB_T1_INIT_EXPIREDS),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	SNMP_MIB_ITEM("SctpT1CookieExpireds", SCTP_MIB_T1_COOKIE_EXPIREDS),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	SNMP_MIB_ITEM("SctpT2ShutdownExpireds", SCTP_MIB_T2_SHUTDOWN_EXPIREDS),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	SNMP_MIB_ITEM("SctpT3RtxExpireds", SCTP_MIB_T3_RTX_EXPIREDS),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	SNMP_MIB_ITEM("SctpT4RtoExpireds", SCTP_MIB_T4_RTO_EXPIREDS),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	SNMP_MIB_ITEM("SctpT5ShutdownGuardExpireds", SCTP_MIB_T5_SHUTDOWN_GUARD_EXPIREDS),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	SNMP_MIB_ITEM("SctpDelaySackExpireds", SCTP_MIB_DELAY_SACK_EXPIREDS),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	SNMP_MIB_ITEM("SctpAutocloseExpireds", SCTP_MIB_AUTOCLOSE_EXPIREDS),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	SNMP_MIB_ITEM("SctpT3Retransmits", SCTP_MIB_T3_RETRANSMITS),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	SNMP_MIB_ITEM("SctpPmtudRetransmits", SCTP_MIB_PMTUD_RETRANSMITS),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	SNMP_MIB_ITEM("SctpFastRetransmits", SCTP_MIB_FAST_RETRANSMITS),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	SNMP_MIB_ITEM("SctpInPktSoftirq", SCTP_MIB_IN_PKT_SOFTIRQ),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	SNMP_MIB_ITEM("SctpInPktBacklog", SCTP_MIB_IN_PKT_BACKLOG),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	SNMP_MIB_ITEM("SctpInPktDiscards", SCTP_MIB_IN_PKT_DISCARDS),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	SNMP_MIB_ITEM("SctpInDataChunkDiscards", SCTP_MIB_IN_DATA_CHUNK_DISCARDS),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	SNMP_MIB_SENTINEL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) /* Display sctp snmp mib statistics(/proc/net/sctp/snmp). */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) static int sctp_snmp_seq_show(struct seq_file *seq, void *v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	unsigned long buff[SCTP_MIB_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	struct net *net = seq->private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	memset(buff, 0, sizeof(unsigned long) * SCTP_MIB_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	snmp_get_cpu_field_batch(buff, sctp_snmp_list,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 				 net->sctp.sctp_statistics);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	for (i = 0; sctp_snmp_list[i].name; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 		seq_printf(seq, "%-32s\t%ld\n", sctp_snmp_list[i].name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 						buff[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) /* Dump local addresses of an association/endpoint. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) static void sctp_seq_dump_local_addrs(struct seq_file *seq, struct sctp_ep_common *epb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	struct sctp_association *asoc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	struct sctp_sockaddr_entry *laddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	struct sctp_transport *peer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	union sctp_addr *addr, *primary = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	struct sctp_af *af;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	if (epb->type == SCTP_EP_TYPE_ASSOCIATION) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 		asoc = sctp_assoc(epb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 		peer = asoc->peer.primary_path;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 		if (unlikely(peer == NULL)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 			WARN(1, "Association %p with NULL primary path!\n", asoc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 			return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 		primary = &peer->saddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	list_for_each_entry_rcu(laddr, &epb->bind_addr.address_list, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 		if (!laddr->valid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 		addr = &laddr->a;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 		af = sctp_get_af_specific(addr->sa.sa_family);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 		if (primary && af->cmp_addr(addr, primary)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 			seq_printf(seq, "*");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 		af->seq_dump_addr(seq, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) /* Dump remote addresses of an association. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) static void sctp_seq_dump_remote_addrs(struct seq_file *seq, struct sctp_association *assoc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	struct sctp_transport *transport;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	union sctp_addr *addr, *primary;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	struct sctp_af *af;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	primary = &assoc->peer.primary_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	list_for_each_entry_rcu(transport, &assoc->peer.transport_addr_list,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 			transports) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 		addr = &transport->ipaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 		af = sctp_get_af_specific(addr->sa.sa_family);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 		if (af->cmp_addr(addr, primary)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 			seq_printf(seq, "*");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 		af->seq_dump_addr(seq, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) static void *sctp_eps_seq_start(struct seq_file *seq, loff_t *pos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	if (*pos >= sctp_ep_hashsize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	if (*pos < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 		*pos = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	if (*pos == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 		seq_printf(seq, " ENDPT     SOCK   STY SST HBKT LPORT   UID INODE LADDRS\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	return (void *)pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) static void sctp_eps_seq_stop(struct seq_file *seq, void *v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) static void *sctp_eps_seq_next(struct seq_file *seq, void *v, loff_t *pos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	if (++*pos >= sctp_ep_hashsize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	return pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) /* Display sctp endpoints (/proc/net/sctp/eps). */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) static int sctp_eps_seq_show(struct seq_file *seq, void *v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	struct sctp_hashbucket *head;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	struct sctp_ep_common *epb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	struct sctp_endpoint *ep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	struct sock *sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	int    hash = *(loff_t *)v;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	if (hash >= sctp_ep_hashsize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	head = &sctp_ep_hashtable[hash];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	read_lock_bh(&head->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	sctp_for_each_hentry(epb, &head->chain) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 		ep = sctp_ep(epb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 		sk = epb->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 		if (!net_eq(sock_net(sk), seq_file_net(seq)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 		seq_printf(seq, "%8pK %8pK %-3d %-3d %-4d %-5d %5u %5lu ", ep, sk,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 			   sctp_sk(sk)->type, sk->sk_state, hash,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 			   epb->bind_addr.port,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 			   from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 			   sock_i_ino(sk));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 		sctp_seq_dump_local_addrs(seq, epb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 		seq_printf(seq, "\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	read_unlock_bh(&head->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) static const struct seq_operations sctp_eps_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	.start = sctp_eps_seq_start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	.next  = sctp_eps_seq_next,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	.stop  = sctp_eps_seq_stop,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	.show  = sctp_eps_seq_show,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) struct sctp_ht_iter {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	struct seq_net_private p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	struct rhashtable_iter hti;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) static void *sctp_transport_seq_start(struct seq_file *seq, loff_t *pos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	struct sctp_ht_iter *iter = seq->private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	sctp_transport_walk_start(&iter->hti);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	return sctp_transport_get_idx(seq_file_net(seq), &iter->hti, *pos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) static void sctp_transport_seq_stop(struct seq_file *seq, void *v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	struct sctp_ht_iter *iter = seq->private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	if (v && v != SEQ_START_TOKEN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 		struct sctp_transport *transport = v;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 		sctp_transport_put(transport);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	sctp_transport_walk_stop(&iter->hti);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) static void *sctp_transport_seq_next(struct seq_file *seq, void *v, loff_t *pos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	struct sctp_ht_iter *iter = seq->private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	if (v && v != SEQ_START_TOKEN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 		struct sctp_transport *transport = v;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 		sctp_transport_put(transport);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	++*pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	return sctp_transport_get_next(seq_file_net(seq), &iter->hti);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) /* Display sctp associations (/proc/net/sctp/assocs). */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) static int sctp_assocs_seq_show(struct seq_file *seq, void *v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	struct sctp_transport *transport;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	struct sctp_association *assoc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	struct sctp_ep_common *epb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	struct sock *sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	if (v == SEQ_START_TOKEN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 		seq_printf(seq, " ASSOC     SOCK   STY SST ST HBKT "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 				"ASSOC-ID TX_QUEUE RX_QUEUE UID INODE LPORT "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 				"RPORT LADDRS <-> RADDRS "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 				"HBINT INS OUTS MAXRT T1X T2X RTXC "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 				"wmema wmemq sndbuf rcvbuf\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	transport = (struct sctp_transport *)v;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	assoc = transport->asoc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	epb = &assoc->base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	sk = epb->sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	seq_printf(seq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 		   "%8pK %8pK %-3d %-3d %-2d %-4d "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 		   "%4d %8d %8d %7u %5lu %-5d %5d ",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 		   assoc, sk, sctp_sk(sk)->type, sk->sk_state,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 		   assoc->state, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 		   assoc->assoc_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 		   assoc->sndbuf_used,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 		   atomic_read(&assoc->rmem_alloc),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 		   from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 		   sock_i_ino(sk),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 		   epb->bind_addr.port,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 		   assoc->peer.port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	seq_printf(seq, " ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	sctp_seq_dump_local_addrs(seq, epb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	seq_printf(seq, "<-> ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	sctp_seq_dump_remote_addrs(seq, assoc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 	seq_printf(seq, "\t%8lu %5d %5d %4d %4d %4d %8d "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 		   "%8d %8d %8d %8d",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 		assoc->hbinterval, assoc->stream.incnt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 		assoc->stream.outcnt, assoc->max_retrans,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 		assoc->init_retries, assoc->shutdown_retries,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 		assoc->rtx_data_chunks,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 		refcount_read(&sk->sk_wmem_alloc),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 		sk->sk_wmem_queued,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 		sk->sk_sndbuf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 		sk->sk_rcvbuf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 	seq_printf(seq, "\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) static const struct seq_operations sctp_assoc_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	.start = sctp_transport_seq_start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 	.next  = sctp_transport_seq_next,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 	.stop  = sctp_transport_seq_stop,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 	.show  = sctp_assocs_seq_show,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) static int sctp_remaddr_seq_show(struct seq_file *seq, void *v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 	struct sctp_association *assoc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 	struct sctp_transport *transport, *tsp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 	if (v == SEQ_START_TOKEN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 		seq_printf(seq, "ADDR ASSOC_ID HB_ACT RTO MAX_PATH_RTX "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 				"REM_ADDR_RTX START STATE\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 	transport = (struct sctp_transport *)v;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 	assoc = transport->asoc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 	list_for_each_entry_rcu(tsp, &assoc->peer.transport_addr_list,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 				transports) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 		 * The remote address (ADDR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 		tsp->af_specific->seq_dump_addr(seq, &tsp->ipaddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 		seq_printf(seq, " ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 		 * The association ID (ASSOC_ID)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 		seq_printf(seq, "%d ", tsp->asoc->assoc_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 		 * If the Heartbeat is active (HB_ACT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 		 * Note: 1 = Active, 0 = Inactive
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 		seq_printf(seq, "%d ", timer_pending(&tsp->hb_timer));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 		 * Retransmit time out (RTO)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 		seq_printf(seq, "%lu ", tsp->rto);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 		 * Maximum path retransmit count (PATH_MAX_RTX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 		seq_printf(seq, "%d ", tsp->pathmaxrxt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 		 * remote address retransmit count (REM_ADDR_RTX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 		 * Note: We don't have a way to tally this at the moment
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 		 * so lets just leave it as zero for the moment
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 		seq_puts(seq, "0 ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 		 * remote address start time (START).  This is also not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 		 * currently implemented, but we can record it with a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 		 * jiffies marker in a subsequent patch
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 		seq_puts(seq, "0 ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 		 * The current state of this destination. I.e.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) 		 * SCTP_ACTIVE, SCTP_INACTIVE, ...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) 		seq_printf(seq, "%d", tsp->state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) 		seq_printf(seq, "\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) static const struct seq_operations sctp_remaddr_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) 	.start = sctp_transport_seq_start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 	.next  = sctp_transport_seq_next,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) 	.stop  = sctp_transport_seq_stop,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) 	.show  = sctp_remaddr_seq_show,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) /* Set up the proc fs entry for the SCTP protocol. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) int __net_init sctp_proc_init(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) 	net->sctp.proc_net_sctp = proc_net_mkdir(net, "sctp", net->proc_net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) 	if (!net->sctp.proc_net_sctp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) 	if (!proc_create_net_single("snmp", 0444, net->sctp.proc_net_sctp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) 			 sctp_snmp_seq_show, NULL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) 		goto cleanup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) 	if (!proc_create_net("eps", 0444, net->sctp.proc_net_sctp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) 			&sctp_eps_ops, sizeof(struct seq_net_private)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) 		goto cleanup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) 	if (!proc_create_net("assocs", 0444, net->sctp.proc_net_sctp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) 			&sctp_assoc_ops, sizeof(struct sctp_ht_iter)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) 		goto cleanup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) 	if (!proc_create_net("remaddr", 0444, net->sctp.proc_net_sctp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) 			&sctp_remaddr_ops, sizeof(struct sctp_ht_iter)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) 		goto cleanup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) cleanup:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) 	remove_proc_subtree("sctp", net->proc_net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) 	net->sctp.proc_net_sctp = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) 	return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) }