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Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
197 lines
5.0 KiB
C
197 lines
5.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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*
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* SNMP MIB entries for the IP subsystem.
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*
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* Alan Cox <gw4pts@gw4pts.ampr.org>
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*
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* We don't chose to implement SNMP in the kernel (this would
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* be silly as SNMP is a pain in the backside in places). We do
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* however need to collect the MIB statistics and export them
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* out of /proc (eventually)
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*/
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#ifndef _SNMP_H
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#define _SNMP_H
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#include <linux/cache.h>
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#include <linux/snmp.h>
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#include <linux/smp.h>
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/*
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* Mibs are stored in array of unsigned long.
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*/
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/*
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* struct snmp_mib{}
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* - list of entries for particular API (such as /proc/net/snmp)
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* - name of entries.
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*/
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struct snmp_mib {
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const char *name;
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int entry;
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};
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#define SNMP_MIB_ITEM(_name,_entry) { \
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.name = _name, \
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.entry = _entry, \
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}
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#define SNMP_MIB_SENTINEL { \
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.name = NULL, \
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.entry = 0, \
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}
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/*
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* We use unsigned longs for most mibs but u64 for ipstats.
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*/
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#include <linux/u64_stats_sync.h>
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/* IPstats */
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#define IPSTATS_MIB_MAX __IPSTATS_MIB_MAX
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struct ipstats_mib {
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/* mibs[] must be first field of struct ipstats_mib */
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u64 mibs[IPSTATS_MIB_MAX];
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struct u64_stats_sync syncp;
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};
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/* ICMP */
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#define ICMP_MIB_MAX __ICMP_MIB_MAX
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struct icmp_mib {
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unsigned long mibs[ICMP_MIB_MAX];
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};
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#define ICMPMSG_MIB_MAX __ICMPMSG_MIB_MAX
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struct icmpmsg_mib {
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atomic_long_t mibs[ICMPMSG_MIB_MAX];
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};
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/* ICMP6 (IPv6-ICMP) */
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#define ICMP6_MIB_MAX __ICMP6_MIB_MAX
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/* per network ns counters */
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struct icmpv6_mib {
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unsigned long mibs[ICMP6_MIB_MAX];
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};
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/* per device counters, (shared on all cpus) */
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struct icmpv6_mib_device {
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atomic_long_t mibs[ICMP6_MIB_MAX];
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};
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#define ICMP6MSG_MIB_MAX __ICMP6MSG_MIB_MAX
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/* per network ns counters */
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struct icmpv6msg_mib {
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atomic_long_t mibs[ICMP6MSG_MIB_MAX];
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};
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/* per device counters, (shared on all cpus) */
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struct icmpv6msg_mib_device {
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atomic_long_t mibs[ICMP6MSG_MIB_MAX];
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};
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/* TCP */
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#define TCP_MIB_MAX __TCP_MIB_MAX
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struct tcp_mib {
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unsigned long mibs[TCP_MIB_MAX];
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};
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/* UDP */
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#define UDP_MIB_MAX __UDP_MIB_MAX
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struct udp_mib {
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unsigned long mibs[UDP_MIB_MAX];
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};
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/* Linux */
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#define LINUX_MIB_MAX __LINUX_MIB_MAX
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struct linux_mib {
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unsigned long mibs[LINUX_MIB_MAX];
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};
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/* Linux Xfrm */
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#define LINUX_MIB_XFRMMAX __LINUX_MIB_XFRMMAX
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struct linux_xfrm_mib {
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unsigned long mibs[LINUX_MIB_XFRMMAX];
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};
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#define DEFINE_SNMP_STAT(type, name) \
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__typeof__(type) __percpu *name
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#define DEFINE_SNMP_STAT_ATOMIC(type, name) \
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__typeof__(type) *name
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#define DECLARE_SNMP_STAT(type, name) \
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extern __typeof__(type) __percpu *name
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#define __SNMP_INC_STATS(mib, field) \
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__this_cpu_inc(mib->mibs[field])
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#define SNMP_INC_STATS_ATOMIC_LONG(mib, field) \
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atomic_long_inc(&mib->mibs[field])
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#define SNMP_INC_STATS(mib, field) \
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this_cpu_inc(mib->mibs[field])
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#define SNMP_DEC_STATS(mib, field) \
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this_cpu_dec(mib->mibs[field])
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#define __SNMP_ADD_STATS(mib, field, addend) \
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__this_cpu_add(mib->mibs[field], addend)
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#define SNMP_ADD_STATS(mib, field, addend) \
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this_cpu_add(mib->mibs[field], addend)
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#define SNMP_UPD_PO_STATS(mib, basefield, addend) \
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do { \
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__typeof__((mib->mibs) + 0) ptr = mib->mibs; \
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this_cpu_inc(ptr[basefield##PKTS]); \
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this_cpu_add(ptr[basefield##OCTETS], addend); \
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} while (0)
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#define __SNMP_UPD_PO_STATS(mib, basefield, addend) \
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do { \
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__typeof__((mib->mibs) + 0) ptr = mib->mibs; \
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__this_cpu_inc(ptr[basefield##PKTS]); \
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__this_cpu_add(ptr[basefield##OCTETS], addend); \
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} while (0)
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#if BITS_PER_LONG==32
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#define __SNMP_ADD_STATS64(mib, field, addend) \
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do { \
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__typeof__(*mib) *ptr = raw_cpu_ptr(mib); \
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u64_stats_update_begin(&ptr->syncp); \
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ptr->mibs[field] += addend; \
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u64_stats_update_end(&ptr->syncp); \
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} while (0)
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#define SNMP_ADD_STATS64(mib, field, addend) \
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do { \
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local_bh_disable(); \
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__SNMP_ADD_STATS64(mib, field, addend); \
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local_bh_enable(); \
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} while (0)
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#define __SNMP_INC_STATS64(mib, field) SNMP_ADD_STATS64(mib, field, 1)
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#define SNMP_INC_STATS64(mib, field) SNMP_ADD_STATS64(mib, field, 1)
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#define __SNMP_UPD_PO_STATS64(mib, basefield, addend) \
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do { \
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__typeof__(*mib) *ptr; \
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ptr = raw_cpu_ptr((mib)); \
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u64_stats_update_begin(&ptr->syncp); \
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ptr->mibs[basefield##PKTS]++; \
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ptr->mibs[basefield##OCTETS] += addend; \
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u64_stats_update_end(&ptr->syncp); \
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} while (0)
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#define SNMP_UPD_PO_STATS64(mib, basefield, addend) \
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do { \
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local_bh_disable(); \
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__SNMP_UPD_PO_STATS64(mib, basefield, addend); \
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local_bh_enable(); \
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} while (0)
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#else
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#define __SNMP_INC_STATS64(mib, field) __SNMP_INC_STATS(mib, field)
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#define SNMP_INC_STATS64(mib, field) SNMP_INC_STATS(mib, field)
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#define SNMP_DEC_STATS64(mib, field) SNMP_DEC_STATS(mib, field)
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#define __SNMP_ADD_STATS64(mib, field, addend) __SNMP_ADD_STATS(mib, field, addend)
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#define SNMP_ADD_STATS64(mib, field, addend) SNMP_ADD_STATS(mib, field, addend)
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#define SNMP_UPD_PO_STATS64(mib, basefield, addend) SNMP_UPD_PO_STATS(mib, basefield, addend)
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#define __SNMP_UPD_PO_STATS64(mib, basefield, addend) __SNMP_UPD_PO_STATS(mib, basefield, addend)
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#endif
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#endif
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