cregit-Linux how code gets into the kernel

Release 4.15 net/ipv6/proc.c

Directory: net/ipv6
/*
 * 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>
 *
 *              This program is free software; you can redistribute it and/or
 *              modify it under the terms of the GNU General Public License
 *              as published by the Free Software Foundation; either version
 *              2 of the License, or (at your option) any later version.
 */
#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; unsigned int frag_mem = ip6_frag_mem(net); 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, "UDPLITE6: inuse %d\n", sock_prot_inuse_get(net, &udplitev6_prot)); seq_printf(seq, "RAW6: inuse %d\n", sock_prot_inuse_get(net, &rawv6_prot)); seq_printf(seq, "FRAG6: inuse %u memory %u\n", !!frag_mem, frag_mem); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)4339.45%333.33%
Pavel Emelyanov2119.27%222.22%
Randy Dunlap1614.68%111.11%
Florian Westphal1412.84%111.11%
Gerrit Renker1110.09%111.11%
Eric Dumazet43.67%111.11%
Total109100.00%9100.00%


static int sockstat6_seq_open(struct inode *inode, struct file *file) { return single_open_net(inode, file, sockstat6_seq_show); }

Contributors

PersonTokensPropCommitsCommitProp
Denis V. Lunev26100.00%1100.00%
Total26100.00%1100.00%

static const struct file_operations sockstat6_seq_fops = { .owner = THIS_MODULE, .open = sockstat6_seq_open, .read = seq_read, .llseek = seq_lseek, .release = single_release_net, }; 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_OUTPKTS), 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_SENTINEL }; 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), SNMP_MIB_SENTINEL }; /* RFC 4293 v6 ICMPMsgStatsTable; named items for RFC 2466 compatibility */ static const char *const icmp6type2name[256] = { [ICMPV6_DEST_UNREACH] = "DestUnreachs", [ICMPV6_PKT_TOOBIG] = "PktTooBigs", [ICMPV6_TIME_EXCEED] = "TimeExcds", [ICMPV6_PARAMPROB] = "ParmProblems", [ICMPV6_ECHO_REQUEST] = "Echos", [ICMPV6_ECHO_REPLY] = "EchoReplies", [ICMPV6_MGM_QUERY] = "GroupMembQueries", [ICMPV6_MGM_REPORT] = "GroupMembResponses", [ICMPV6_MGM_REDUCTION] = "GroupMembReductions", [ICMPV6_MLD2_REPORT] = "MLDv2Reports", [NDISC_ROUTER_ADVERTISEMENT] = "RouterAdvertisements", [NDISC_ROUTER_SOLICITATION] = "RouterSolicits", [NDISC_NEIGHBOUR_ADVERTISEMENT] = "NeighborAdvertisements", [NDISC_NEIGHBOUR_SOLICITATION] = "NeighborSolicits", [NDISC_REDIRECT] = "Redirects", }; 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_SENTINEL }; static const struct snmp_mib snmp6_udplite6_list[] = { SNMP_MIB_ITEM("UdpLite6InDatagrams", UDP_MIB_INDATAGRAMS), SNMP_MIB_ITEM("UdpLite6NoPorts", UDP_MIB_NOPORTS), SNMP_MIB_ITEM("UdpLite6InErrors", UDP_MIB_INERRORS), SNMP_MIB_ITEM("UdpLite6OutDatagrams", UDP_MIB_OUTDATAGRAMS), SNMP_MIB_ITEM("UdpLite6RcvbufErrors", UDP_MIB_RCVBUFERRORS), SNMP_MIB_ITEM("UdpLite6SndbufErrors", UDP_MIB_SNDBUFERRORS), SNMP_MIB_ITEM("UdpLite6InCsumErrors", UDP_MIB_CSUMERRORS), SNMP_MIB_SENTINEL };
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++) { int icmptype; const char *p; icmptype = i & 0xff; p = icmp6type2name[icmptype]; 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); } }

Contributors

PersonTokensPropCommitsCommitProp
David L Stevens16090.91%133.33%
Eric Dumazet158.52%133.33%
Jan Engelhardt10.57%133.33%
Total176100.00%3100.00%

/* 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) { unsigned long buff[SNMP_MIB_MAX]; int i; if (pcpumib) { memset(buff, 0, sizeof(unsigned long) * SNMP_MIB_MAX); snmp_get_cpu_field_batch(buff, itemlist, pcpumib); for (i = 0; itemlist[i].name; i++) seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name, buff[i]); } else { for (i = 0; itemlist[i].name; i++) seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name, atomic_long_read(smib + itemlist[i].entry)); } }

Contributors

PersonTokensPropCommitsCommitProp
Jia He7047.95%111.11%
Linus Torvalds (pre-git)3322.60%222.22%
Eric Dumazet2215.07%111.11%
Hideaki Yoshifuji / 吉藤英明149.59%222.22%
Randy Dunlap53.42%111.11%
Tejun Heo10.68%111.11%
Alexey Dobriyan10.68%111.11%
Total146100.00%9100.00%


static void snmp6_seq_show_item64(struct seq_file *seq, void __percpu *mib, const struct snmp_mib *itemlist, size_t syncpoff) { u64 buff64[SNMP_MIB_MAX]; int i; memset(buff64, 0, sizeof(u64) * SNMP_MIB_MAX); snmp_get_cpu_field64_batch(buff64, itemlist, mib, syncpoff); for (i = 0; itemlist[i].name; i++) seq_printf(seq, "%-32s\t%llu\n", itemlist[i].name, buff64[i]); }

Contributors

PersonTokensPropCommitsCommitProp
Eric Dumazet6265.96%133.33%
Jia He2829.79%133.33%
Christian Perle44.26%133.33%
Total94100.00%3100.00%


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, offsetof(struct ipstats_mib, syncp)); snmp6_seq_show_item(seq, net->mib.icmpv6_statistics, NULL, 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); snmp6_seq_show_item(seq, net->mib.udplite_stats_in6, NULL, snmp6_udplite6_list); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Denis V. Lunev4540.54%541.67%
Hideaki Yoshifuji / 吉藤英明3632.43%216.67%
Eric Dumazet1715.32%325.00%
Randy Dunlap76.31%18.33%
David L Stevens65.41%18.33%
Total111100.00%12100.00%


static int snmp6_seq_open(struct inode *inode, struct file *file) { return single_open_net(inode, file, snmp6_seq_show); }

Contributors

PersonTokensPropCommitsCommitProp
Denis V. Lunev26100.00%2100.00%
Total26100.00%2100.00%

static const struct file_operations snmp6_seq_fops = { .owner = THIS_MODULE, .open = snmp6_seq_open, .read = seq_read, .llseek = seq_lseek, .release = single_release_net, };
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, offsetof(struct ipstats_mib, syncp)); snmp6_seq_show_item(seq, NULL, idev->stats.icmpv6dev->mibs, snmp6_icmp6_list); snmp6_seq_show_icmpv6msg(seq, idev->stats.icmpv6msgdev->mibs); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Denis V. Lunev6061.22%114.29%
Eric Dumazet1717.35%228.57%
Hideaki Yoshifuji / 吉藤英明77.14%114.29%
David L Stevens55.10%114.29%
Gerrit Renker55.10%114.29%
Randy Dunlap44.08%114.29%
Total98100.00%7100.00%


static int snmp6_dev_seq_open(struct inode *inode, struct file *file) { return single_open(file, snmp6_dev_seq_show, PDE_DATA(inode)); }

Contributors

PersonTokensPropCommitsCommitProp
Randy Dunlap2379.31%125.00%
Hideaki Yoshifuji / 吉藤英明310.34%125.00%
Denis V. Lunev26.90%125.00%
Al Viro13.45%125.00%
Total29100.00%4100.00%

static const struct file_operations snmp6_dev_seq_fops = { .owner = THIS_MODULE, .open = snmp6_dev_seq_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, };
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_data(idev->dev->name, S_IRUGO, net->mib.proc_net_devsnmp6, &snmp6_dev_seq_fops, idev); if (!p) return -ENOMEM; idev->stats.proc_dir_entry = p; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明7272.00%337.50%
Denis V. Lunev2323.00%337.50%
Daniel Lezcano33.00%112.50%
Wang Chen22.00%112.50%
Total100100.00%8100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明4363.24%125.00%
Denis V. Lunev1623.53%125.00%
Stephen Hemminger811.76%125.00%
David Howells11.47%125.00%
Total68100.00%4100.00%


static int __net_init ipv6_proc_init_net(struct net *net) { if (!proc_create("sockstat6", S_IRUGO, net->proc_net, &sockstat6_seq_fops)) return -ENOMEM; if (!proc_create("snmp6", S_IRUGO, net->proc_net, &snmp6_seq_fops)) 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; }

Contributors

PersonTokensPropCommitsCommitProp
Denis V. Lunev5449.54%116.67%
Pavel Emelyanov3027.52%116.67%
Gao Feng2018.35%233.33%
Igor Maravić43.67%116.67%
Alexey Dobriyan10.92%116.67%
Total109100.00%6100.00%


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); }

Contributors

PersonTokensPropCommitsCommitProp
Pavel Emelyanov1538.46%125.00%
Gao Feng1538.46%125.00%
Denis V. Lunev820.51%125.00%
Alexey Dobriyan12.56%125.00%
Total39100.00%4100.00%

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); }

Contributors

PersonTokensPropCommitsCommitProp
Randy Dunlap746.67%125.00%
Pavel Emelyanov533.33%125.00%
Linus Torvalds (pre-git)213.33%125.00%
Denis V. Lunev16.67%125.00%
Total15100.00%4100.00%


void ipv6_misc_proc_exit(void) { unregister_pernet_subsys(&ipv6_proc_ops); }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明753.85%266.67%
Pavel Emelyanov646.15%133.33%
Total13100.00%3100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Denis V. Lunev32917.77%913.24%
Hideaki Yoshifuji / 吉藤英明32717.67%1217.65%
David L Stevens26114.10%11.47%
Eric Dumazet22211.99%913.24%
Linus Torvalds (pre-git)20511.08%57.35%
Jia He1166.27%11.47%
Pavel Emelyanov945.08%34.41%
Randy Dunlap935.02%22.94%
Gerrit Renker542.92%11.47%
Neil Horman442.38%11.47%
Gao Feng351.89%22.94%
Florian Westphal140.76%11.47%
Stephen Hemminger80.43%11.47%
Alexey Dobriyan70.38%22.94%
Rick Jones70.38%11.47%
Wang Chen40.22%22.94%
Herbert Xu40.22%22.94%
Igor Maravić40.22%11.47%
Christian Perle40.22%11.47%
Paul Gortmaker30.16%11.47%
Jan Engelhardt30.16%11.47%
Eric W. Biedermann30.16%11.47%
Daniel Lezcano30.16%11.47%
Tejun Heo10.05%11.47%
Ian Morris10.05%11.47%
Arjan van de Ven10.05%11.47%
David S. Miller10.05%11.47%
Nicolas Dichtel10.05%11.47%
Al Viro10.05%11.47%
David Howells10.05%11.47%
Total1851100.00%68100.00%
Directory: net/ipv6
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