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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315// 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);}