^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) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * SNMP MIB entries for the IP subsystem.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Alan Cox <gw4pts@gw4pts.ampr.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * We don't chose to implement SNMP in the kernel (this would
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * be silly as SNMP is a pain in the backside in places). We do
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * however need to collect the MIB statistics and export them
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * out of /proc (eventually)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #ifndef _SNMP_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #define _SNMP_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/cache.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/snmp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/smp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) * Mibs are stored in array of unsigned long.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * struct snmp_mib{}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) * - list of entries for particular API (such as /proc/net/snmp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * - name of entries.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) struct snmp_mib {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) const char *name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) int entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #define SNMP_MIB_ITEM(_name,_entry) { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) .name = _name, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) .entry = _entry, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #define SNMP_MIB_SENTINEL { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) .name = NULL, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) .entry = 0, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) * We use unsigned longs for most mibs but u64 for ipstats.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #include <linux/u64_stats_sync.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) /* IPstats */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #define IPSTATS_MIB_MAX __IPSTATS_MIB_MAX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) struct ipstats_mib {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) /* mibs[] must be first field of struct ipstats_mib */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) u64 mibs[IPSTATS_MIB_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) struct u64_stats_sync syncp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) /* ICMP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) #define ICMP_MIB_MAX __ICMP_MIB_MAX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) struct icmp_mib {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) unsigned long mibs[ICMP_MIB_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) #define ICMPMSG_MIB_MAX __ICMPMSG_MIB_MAX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) struct icmpmsg_mib {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) atomic_long_t mibs[ICMPMSG_MIB_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) /* ICMP6 (IPv6-ICMP) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) #define ICMP6_MIB_MAX __ICMP6_MIB_MAX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) /* per network ns counters */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) struct icmpv6_mib {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) unsigned long mibs[ICMP6_MIB_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) /* per device counters, (shared on all cpus) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) struct icmpv6_mib_device {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) atomic_long_t mibs[ICMP6_MIB_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) #define ICMP6MSG_MIB_MAX __ICMP6MSG_MIB_MAX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) /* per network ns counters */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) struct icmpv6msg_mib {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) atomic_long_t mibs[ICMP6MSG_MIB_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) /* per device counters, (shared on all cpus) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) struct icmpv6msg_mib_device {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) atomic_long_t mibs[ICMP6MSG_MIB_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) /* TCP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) #define TCP_MIB_MAX __TCP_MIB_MAX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) struct tcp_mib {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) unsigned long mibs[TCP_MIB_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) /* UDP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) #define UDP_MIB_MAX __UDP_MIB_MAX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) struct udp_mib {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) unsigned long mibs[UDP_MIB_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) /* Linux */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) #define LINUX_MIB_MAX __LINUX_MIB_MAX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) struct linux_mib {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) unsigned long mibs[LINUX_MIB_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) /* Linux Xfrm */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) #define LINUX_MIB_XFRMMAX __LINUX_MIB_XFRMMAX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) struct linux_xfrm_mib {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) unsigned long mibs[LINUX_MIB_XFRMMAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) /* Linux TLS */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) #define LINUX_MIB_TLSMAX __LINUX_MIB_TLSMAX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) struct linux_tls_mib {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) unsigned long mibs[LINUX_MIB_TLSMAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) #define DEFINE_SNMP_STAT(type, name) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) __typeof__(type) __percpu *name
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) #define DEFINE_SNMP_STAT_ATOMIC(type, name) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) __typeof__(type) *name
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) #define DECLARE_SNMP_STAT(type, name) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) extern __typeof__(type) __percpu *name
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) #define __SNMP_INC_STATS(mib, field) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) __this_cpu_inc(mib->mibs[field])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) #define SNMP_INC_STATS_ATOMIC_LONG(mib, field) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) atomic_long_inc(&mib->mibs[field])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) #define SNMP_INC_STATS(mib, field) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) this_cpu_inc(mib->mibs[field])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) #define SNMP_DEC_STATS(mib, field) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) this_cpu_dec(mib->mibs[field])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) #define __SNMP_ADD_STATS(mib, field, addend) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) __this_cpu_add(mib->mibs[field], addend)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) #define SNMP_ADD_STATS(mib, field, addend) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) this_cpu_add(mib->mibs[field], addend)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) #define SNMP_UPD_PO_STATS(mib, basefield, addend) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) do { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) __typeof__((mib->mibs) + 0) ptr = mib->mibs; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) this_cpu_inc(ptr[basefield##PKTS]); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) this_cpu_add(ptr[basefield##OCTETS], addend); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) #define __SNMP_UPD_PO_STATS(mib, basefield, addend) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) do { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) __typeof__((mib->mibs) + 0) ptr = mib->mibs; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) __this_cpu_inc(ptr[basefield##PKTS]); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) __this_cpu_add(ptr[basefield##OCTETS], addend); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) #if BITS_PER_LONG==32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) #define __SNMP_ADD_STATS64(mib, field, addend) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) do { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) __typeof__(*mib) *ptr = raw_cpu_ptr(mib); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) u64_stats_update_begin(&ptr->syncp); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) ptr->mibs[field] += addend; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) u64_stats_update_end(&ptr->syncp); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) #define SNMP_ADD_STATS64(mib, field, addend) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) do { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) local_bh_disable(); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) __SNMP_ADD_STATS64(mib, field, addend); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) local_bh_enable(); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) #define __SNMP_INC_STATS64(mib, field) SNMP_ADD_STATS64(mib, field, 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) #define SNMP_INC_STATS64(mib, field) SNMP_ADD_STATS64(mib, field, 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) #define __SNMP_UPD_PO_STATS64(mib, basefield, addend) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) do { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) __typeof__(*mib) *ptr; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) ptr = raw_cpu_ptr((mib)); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) u64_stats_update_begin(&ptr->syncp); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) ptr->mibs[basefield##PKTS]++; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) ptr->mibs[basefield##OCTETS] += addend; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) u64_stats_update_end(&ptr->syncp); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) #define SNMP_UPD_PO_STATS64(mib, basefield, addend) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) do { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) local_bh_disable(); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) __SNMP_UPD_PO_STATS64(mib, basefield, addend); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) local_bh_enable(); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) #define __SNMP_INC_STATS64(mib, field) __SNMP_INC_STATS(mib, field)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) #define SNMP_INC_STATS64(mib, field) SNMP_INC_STATS(mib, field)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) #define SNMP_DEC_STATS64(mib, field) SNMP_DEC_STATS(mib, field)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) #define __SNMP_ADD_STATS64(mib, field, addend) __SNMP_ADD_STATS(mib, field, addend)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) #define SNMP_ADD_STATS64(mib, field, addend) SNMP_ADD_STATS(mib, field, addend)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) #define SNMP_UPD_PO_STATS64(mib, basefield, addend) SNMP_UPD_PO_STATS(mib, basefield, addend)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) #define __SNMP_UPD_PO_STATS64(mib, basefield, addend) __SNMP_UPD_PO_STATS(mib, basefield, addend)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) #endif
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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