// SPDX-License-Identifier: GPL-2.0-or-later/* * INET		An implementation of the TCP/IP protocol suite for the LINUX *		operating system.  INET is implemented using the  BSD Socket *		interface as the means of communication with the user level. * *		This file implements the various access functions for the *		PROC file system.  This is very similar to the IPv4 version, *		except it reports the sockets in the INET6 address family. * * Authors:	David S. Miller (davem@caip.rutgers.edu) *		YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> */#include <linux/socket.h>#include <linux/net.h>#include <linux/ipv6.h>#include <linux/proc_fs.h>#include <linux/seq_file.h>#include <linux/stddef.h>#include <linux/export.h>#include <net/net_namespace.h>#include <net/ip.h>#include <net/sock.h>#include <net/tcp.h>#include <net/udp.h>#include <net/transp_v6.h>#include <net/ipv6.h> #define MAX4(a, b, c, d) \	MAX_T(u32, MAX_T(u32, a, b), MAX_T(u32, c, d))#define SNMP_MIB_MAX MAX4(UDP_MIB_MAX, TCP_MIB_MAX, \			IPSTATS_MIB_MAX, ICMP_MIB_MAX) static int sockstat6_seq_show(struct seq_file *seq, void *v){	struct net *net = seq->private; 	seq_printf(seq, "TCP6: inuse %d\n",		       sock_prot_inuse_get(net, &tcpv6_prot));	seq_printf(seq, "UDP6: inuse %d\n",		       sock_prot_inuse_get(net, &udpv6_prot));	seq_printf(seq, "RAW6: inuse %d\n",		       sock_prot_inuse_get(net, &rawv6_prot));	seq_printf(seq, "FRAG6: inuse %u memory %lu\n",		   atomic_read(&net->ipv6.fqdir->rhashtable.nelems),		   frag_mem_limit(net->ipv6.fqdir));	return 0;} static const struct snmp_mib snmp6_ipstats_list[] = {/* ipv6 mib according to RFC 2465 */	SNMP_MIB_ITEM("Ip6InReceives", IPSTATS_MIB_INPKTS),	SNMP_MIB_ITEM("Ip6InHdrErrors", IPSTATS_MIB_INHDRERRORS),	SNMP_MIB_ITEM("Ip6InTooBigErrors", IPSTATS_MIB_INTOOBIGERRORS),	SNMP_MIB_ITEM("Ip6InNoRoutes", IPSTATS_MIB_INNOROUTES),	SNMP_MIB_ITEM("Ip6InAddrErrors", IPSTATS_MIB_INADDRERRORS),	SNMP_MIB_ITEM("Ip6InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),	SNMP_MIB_ITEM("Ip6InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),	SNMP_MIB_ITEM("Ip6InDiscards", IPSTATS_MIB_INDISCARDS),	SNMP_MIB_ITEM("Ip6InDelivers", IPSTATS_MIB_INDELIVERS),	SNMP_MIB_ITEM("Ip6OutForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),	SNMP_MIB_ITEM("Ip6OutRequests", IPSTATS_MIB_OUTREQUESTS),	SNMP_MIB_ITEM("Ip6OutDiscards", IPSTATS_MIB_OUTDISCARDS),	SNMP_MIB_ITEM("Ip6OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),	SNMP_MIB_ITEM("Ip6ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),	SNMP_MIB_ITEM("Ip6ReasmReqds", IPSTATS_MIB_REASMREQDS),	SNMP_MIB_ITEM("Ip6ReasmOKs", IPSTATS_MIB_REASMOKS),	SNMP_MIB_ITEM("Ip6ReasmFails", IPSTATS_MIB_REASMFAILS),	SNMP_MIB_ITEM("Ip6FragOKs", IPSTATS_MIB_FRAGOKS),	SNMP_MIB_ITEM("Ip6FragFails", IPSTATS_MIB_FRAGFAILS),	SNMP_MIB_ITEM("Ip6FragCreates", IPSTATS_MIB_FRAGCREATES),	SNMP_MIB_ITEM("Ip6InMcastPkts", IPSTATS_MIB_INMCASTPKTS),	SNMP_MIB_ITEM("Ip6OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),	SNMP_MIB_ITEM("Ip6InOctets", IPSTATS_MIB_INOCTETS),	SNMP_MIB_ITEM("Ip6OutOctets", IPSTATS_MIB_OUTOCTETS),	SNMP_MIB_ITEM("Ip6InMcastOctets", IPSTATS_MIB_INMCASTOCTETS),	SNMP_MIB_ITEM("Ip6OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS),	SNMP_MIB_ITEM("Ip6InBcastOctets", IPSTATS_MIB_INBCASTOCTETS),	SNMP_MIB_ITEM("Ip6OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS),	/* IPSTATS_MIB_CSUMERRORS is not relevant in IPv6 (no checksum) */	SNMP_MIB_ITEM("Ip6InNoECTPkts", IPSTATS_MIB_NOECTPKTS),	SNMP_MIB_ITEM("Ip6InECT1Pkts", IPSTATS_MIB_ECT1PKTS),	SNMP_MIB_ITEM("Ip6InECT0Pkts", IPSTATS_MIB_ECT0PKTS),	SNMP_MIB_ITEM("Ip6InCEPkts", IPSTATS_MIB_CEPKTS),	SNMP_MIB_ITEM("Ip6OutTransmits", IPSTATS_MIB_OUTPKTS),}; static const struct snmp_mib snmp6_icmp6_list[] = {/* icmpv6 mib according to RFC 2466 */	SNMP_MIB_ITEM("Icmp6InMsgs", ICMP6_MIB_INMSGS),	SNMP_MIB_ITEM("Icmp6InErrors", ICMP6_MIB_INERRORS),	SNMP_MIB_ITEM("Icmp6OutMsgs", ICMP6_MIB_OUTMSGS),	SNMP_MIB_ITEM("Icmp6OutErrors", ICMP6_MIB_OUTERRORS),	SNMP_MIB_ITEM("Icmp6InCsumErrors", ICMP6_MIB_CSUMERRORS),/* ICMP6_MIB_RATELIMITHOST needs to be last, see snmp6_dev_seq_show(). */	SNMP_MIB_ITEM("Icmp6OutRateLimitHost", ICMP6_MIB_RATELIMITHOST),}; static const struct snmp_mib snmp6_udp6_list[] = {	SNMP_MIB_ITEM("Udp6InDatagrams", UDP_MIB_INDATAGRAMS),	SNMP_MIB_ITEM("Udp6NoPorts", UDP_MIB_NOPORTS),	SNMP_MIB_ITEM("Udp6InErrors", UDP_MIB_INERRORS),	SNMP_MIB_ITEM("Udp6OutDatagrams", UDP_MIB_OUTDATAGRAMS),	SNMP_MIB_ITEM("Udp6RcvbufErrors", UDP_MIB_RCVBUFERRORS),	SNMP_MIB_ITEM("Udp6SndbufErrors", UDP_MIB_SNDBUFERRORS),	SNMP_MIB_ITEM("Udp6InCsumErrors", UDP_MIB_CSUMERRORS),	SNMP_MIB_ITEM("Udp6IgnoredMulti", UDP_MIB_IGNOREDMULTI),	SNMP_MIB_ITEM("Udp6MemErrors", UDP_MIB_MEMERRORS),}; static void snmp6_seq_show_icmpv6msg(struct seq_file *seq, atomic_long_t *smib){	char name[32];	int i; 	/* print by name -- deprecated items */	for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {		const char *p = NULL;		int icmptype; #define CASE(TYP, STR) case TYP: p = STR; break; 		icmptype = i & 0xff;		switch (icmptype) {/* RFC 4293 v6 ICMPMsgStatsTable; named items for RFC 2466 compatibility */		CASE(ICMPV6_DEST_UNREACH,	"DestUnreachs")		CASE(ICMPV6_PKT_TOOBIG,		"PktTooBigs")		CASE(ICMPV6_TIME_EXCEED,	"TimeExcds")		CASE(ICMPV6_PARAMPROB,		"ParmProblems")		CASE(ICMPV6_ECHO_REQUEST,	"Echos")		CASE(ICMPV6_ECHO_REPLY,		"EchoReplies")		CASE(ICMPV6_MGM_QUERY,		"GroupMembQueries")		CASE(ICMPV6_MGM_REPORT,		"GroupMembResponses")		CASE(ICMPV6_MGM_REDUCTION,	"GroupMembReductions")		CASE(ICMPV6_MLD2_REPORT,	"MLDv2Reports")		CASE(NDISC_ROUTER_ADVERTISEMENT, "RouterAdvertisements")		CASE(NDISC_ROUTER_SOLICITATION, "RouterSolicits")		CASE(NDISC_NEIGHBOUR_ADVERTISEMENT, "NeighborAdvertisements")		CASE(NDISC_NEIGHBOUR_SOLICITATION, "NeighborSolicits")		CASE(NDISC_REDIRECT,		"Redirects")		}#undef CASE		if (!p)	/* don't print un-named types here */			continue;		snprintf(name, sizeof(name), "Icmp6%s%s",			i & 0x100 ? "Out" : "In", p);		seq_printf(seq, "%-32s\t%lu\n", name,			   atomic_long_read(smib + i));	} 	/* print by number (nonzero only) - ICMPMsgStat format */	for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {		unsigned long val; 		val = atomic_long_read(smib + i);		if (!val)			continue;		snprintf(name, sizeof(name), "Icmp6%sType%u",			i & 0x100 ?  "Out" : "In", i & 0xff);		seq_printf(seq, "%-32s\t%lu\n", name, val);	}} /* can be called either with percpu mib (pcpumib != NULL), * or shared one (smib != NULL) */static void snmp6_seq_show_item(struct seq_file *seq, void __percpu *pcpumib,				atomic_long_t *smib,				const struct snmp_mib *itemlist,				int cnt){	unsigned long buff[SNMP_MIB_MAX];	int i; 	if (pcpumib) {		memset(buff, 0, sizeof(unsigned long) * cnt); 		snmp_get_cpu_field_batch_cnt(buff, itemlist, cnt, pcpumib);		for (i = 0; i < cnt; i++)			seq_printf(seq, "%-32s\t%lu\n",				   itemlist[i].name, buff[i]);	} else {		for (i = 0; i < cnt; i++)			seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name,				   atomic_long_read(smib + itemlist[i].entry));	}} static void snmp6_seq_show_item64(struct seq_file *seq, void __percpu *mib,				  const struct snmp_mib *itemlist,				  int cnt, size_t syncpoff){	u64 buff64[SNMP_MIB_MAX];	int i; 	memset(buff64, 0, sizeof(u64) * cnt); 	snmp_get_cpu_field64_batch_cnt(buff64, itemlist, cnt, mib, syncpoff);	for (i = 0; i < cnt; i++)		seq_printf(seq, "%-32s\t%llu\n", itemlist[i].name, buff64[i]);} static int snmp6_seq_show(struct seq_file *seq, void *v){	struct net *net = (struct net *)seq->private; 	snmp6_seq_show_item64(seq, net->mib.ipv6_statistics,			      snmp6_ipstats_list,			      ARRAY_SIZE(snmp6_ipstats_list),			      offsetof(struct ipstats_mib, syncp));	snmp6_seq_show_item(seq, net->mib.icmpv6_statistics,			    NULL, snmp6_icmp6_list,			    ARRAY_SIZE(snmp6_icmp6_list));	snmp6_seq_show_icmpv6msg(seq, net->mib.icmpv6msg_statistics->mibs);	snmp6_seq_show_item(seq, net->mib.udp_stats_in6,			    NULL, snmp6_udp6_list,			    ARRAY_SIZE(snmp6_udp6_list));	return 0;} static int snmp6_dev_seq_show(struct seq_file *seq, void *v){	struct inet6_dev *idev = (struct inet6_dev *)seq->private; 	seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex);	snmp6_seq_show_item64(seq, idev->stats.ipv6,			      snmp6_ipstats_list,			      ARRAY_SIZE(snmp6_ipstats_list),			      offsetof(struct ipstats_mib, syncp)); 	/* Per idev icmp stats do not have ICMP6_MIB_RATELIMITHOST */	snmp6_seq_show_item(seq, NULL, idev->stats.icmpv6dev->mibs,			    snmp6_icmp6_list, ARRAY_SIZE(snmp6_icmp6_list) - 1); 	snmp6_seq_show_icmpv6msg(seq, idev->stats.icmpv6msgdev->mibs);	return 0;} int snmp6_register_dev(struct inet6_dev *idev){	struct proc_dir_entry *p;	struct net *net; 	if (!idev || !idev->dev)		return -EINVAL; 	net = dev_net(idev->dev);	if (!net->mib.proc_net_devsnmp6)		return -ENOENT; 	p = proc_create_single_data(idev->dev->name, 0444,			net->mib.proc_net_devsnmp6, snmp6_dev_seq_show, idev);	if (!p)		return -ENOMEM; 	idev->stats.proc_dir_entry = p;	return 0;} int snmp6_unregister_dev(struct inet6_dev *idev){	struct net *net = dev_net(idev->dev);	if (!net->mib.proc_net_devsnmp6)		return -ENOENT;	if (!idev->stats.proc_dir_entry)		return -EINVAL;	proc_remove(idev->stats.proc_dir_entry);	idev->stats.proc_dir_entry = NULL;	return 0;} static int __net_init ipv6_proc_init_net(struct net *net){	if (!proc_create_net_single("sockstat6", 0444, net->proc_net,			sockstat6_seq_show, NULL))		return -ENOMEM; 	if (!proc_create_net_single("snmp6", 0444, net->proc_net,			snmp6_seq_show, NULL))		goto proc_snmp6_fail; 	net->mib.proc_net_devsnmp6 = proc_mkdir("dev_snmp6", net->proc_net);	if (!net->mib.proc_net_devsnmp6)		goto proc_dev_snmp6_fail;	return 0; proc_dev_snmp6_fail:	remove_proc_entry("snmp6", net->proc_net);proc_snmp6_fail:	remove_proc_entry("sockstat6", net->proc_net);	return -ENOMEM;} static void __net_exit ipv6_proc_exit_net(struct net *net){	remove_proc_entry("sockstat6", net->proc_net);	remove_proc_entry("dev_snmp6", net->proc_net);	remove_proc_entry("snmp6", net->proc_net);} static struct pernet_operations ipv6_proc_ops = {	.init = ipv6_proc_init_net,	.exit = ipv6_proc_exit_net,}; int __init ipv6_misc_proc_init(void){	return register_pernet_subsys(&ipv6_proc_ops);} void ipv6_misc_proc_exit(void){	unregister_pernet_subsys(&ipv6_proc_ops);}