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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197/* SPDX-License-Identifier: GPL-2.0-or-later *//* * * SNMP MIB entries for the IP subsystem. * * Alan Cox <gw4pts@gw4pts.ampr.org> * * We don't chose to implement SNMP in the kernel (this would * be silly as SNMP is a pain in the backside in places). We do * however need to collect the MIB statistics and export them * out of /proc (eventually) */ #ifndef _SNMP_H#define _SNMP_H
#include <linux/cache.h>#include <linux/snmp.h>#include <linux/smp.h>
/* * Mibs are stored in array of unsigned long. *//* * struct snmp_mib{} * - list of entries for particular API (such as /proc/net/snmp) * - name of entries. */struct snmp_mib { const char *name; int entry;};
#define SNMP_MIB_ITEM(_name,_entry) { \ .name = _name, \ .entry = _entry, \}
/* * We use unsigned longs for most mibs but u64 for ipstats. */#include <linux/u64_stats_sync.h>
/* IPstats */#define IPSTATS_MIB_MAX __IPSTATS_MIB_MAXstruct ipstats_mib { /* mibs[] must be first field of struct ipstats_mib */ u64 mibs[IPSTATS_MIB_MAX]; struct u64_stats_sync syncp;};
/* ICMP */#define ICMP_MIB_MAX __ICMP_MIB_MAXstruct icmp_mib { unsigned long mibs[ICMP_MIB_MAX];};
#define ICMPMSG_MIB_MAX __ICMPMSG_MIB_MAXstruct icmpmsg_mib { atomic_long_t mibs[ICMPMSG_MIB_MAX];};
/* ICMP6 (IPv6-ICMP) */#define ICMP6_MIB_MAX __ICMP6_MIB_MAX/* per network ns counters */struct icmpv6_mib { unsigned long mibs[ICMP6_MIB_MAX];};/* per device counters, (shared on all cpus) */struct icmpv6_mib_device { atomic_long_t mibs[ICMP6_MIB_MAX];};
#define ICMP6MSG_MIB_MAX __ICMP6MSG_MIB_MAX/* per network ns counters */struct icmpv6msg_mib { atomic_long_t mibs[ICMP6MSG_MIB_MAX];};/* per device counters, (shared on all cpus) */struct icmpv6msg_mib_device { atomic_long_t mibs[ICMP6MSG_MIB_MAX];};
/* TCP */#define TCP_MIB_MAX __TCP_MIB_MAXstruct tcp_mib { unsigned long mibs[TCP_MIB_MAX];};
/* UDP */#define UDP_MIB_MAX __UDP_MIB_MAXstruct udp_mib { unsigned long mibs[UDP_MIB_MAX];};
/* Linux */#define LINUX_MIB_MAX __LINUX_MIB_MAXstruct linux_mib { unsigned long mibs[LINUX_MIB_MAX];};
/* Linux Xfrm */#define LINUX_MIB_XFRMMAX __LINUX_MIB_XFRMMAXstruct linux_xfrm_mib { unsigned long mibs[LINUX_MIB_XFRMMAX];};
/* Linux TLS */#define LINUX_MIB_TLSMAX __LINUX_MIB_TLSMAXstruct linux_tls_mib { unsigned long mibs[LINUX_MIB_TLSMAX];};
#define DEFINE_SNMP_STAT(type, name) \ __typeof__(type) __percpu *name#define DEFINE_SNMP_STAT_ATOMIC(type, name) \ __typeof__(type) *name#define DECLARE_SNMP_STAT(type, name) \ extern __typeof__(type) __percpu *name
#define __SNMP_INC_STATS(mib, field) \ __this_cpu_inc(mib->mibs[field])
#define SNMP_INC_STATS_ATOMIC_LONG(mib, field) \ atomic_long_inc(&mib->mibs[field])
#define SNMP_INC_STATS(mib, field) \ this_cpu_inc(mib->mibs[field])
#define SNMP_DEC_STATS(mib, field) \ this_cpu_dec(mib->mibs[field])
#define __SNMP_ADD_STATS(mib, field, addend) \ __this_cpu_add(mib->mibs[field], addend)
#define SNMP_ADD_STATS(mib, field, addend) \ this_cpu_add(mib->mibs[field], addend)#define SNMP_UPD_PO_STATS(mib, basefield, addend) \ do { \ __typeof__((mib->mibs) + 0) ptr = mib->mibs; \ this_cpu_inc(ptr[basefield##PKTS]); \ this_cpu_add(ptr[basefield##OCTETS], addend); \ } while (0)#define __SNMP_UPD_PO_STATS(mib, basefield, addend) \ do { \ __typeof__((mib->mibs) + 0) ptr = mib->mibs; \ __this_cpu_inc(ptr[basefield##PKTS]); \ __this_cpu_add(ptr[basefield##OCTETS], addend); \ } while (0)
#if BITS_PER_LONG==32
#define __SNMP_ADD_STATS64(mib, field, addend) \ do { \ TYPEOF_UNQUAL(*mib) *ptr = raw_cpu_ptr(mib); \ u64_stats_update_begin(&ptr->syncp); \ ptr->mibs[field] += addend; \ u64_stats_update_end(&ptr->syncp); \ } while (0)
#define SNMP_ADD_STATS64(mib, field, addend) \ do { \ local_bh_disable(); \ __SNMP_ADD_STATS64(mib, field, addend); \ local_bh_enable(); \ } while (0)
#define __SNMP_INC_STATS64(mib, field) SNMP_ADD_STATS64(mib, field, 1)#define SNMP_INC_STATS64(mib, field) SNMP_ADD_STATS64(mib, field, 1)#define __SNMP_UPD_PO_STATS64(mib, basefield, addend) \ do { \ TYPEOF_UNQUAL(*mib) *ptr = raw_cpu_ptr(mib); \ u64_stats_update_begin(&ptr->syncp); \ ptr->mibs[basefield##PKTS]++; \ ptr->mibs[basefield##OCTETS] += addend; \ u64_stats_update_end(&ptr->syncp); \ } while (0)#define SNMP_UPD_PO_STATS64(mib, basefield, addend) \ do { \ local_bh_disable(); \ __SNMP_UPD_PO_STATS64(mib, basefield, addend); \ local_bh_enable(); \ } while (0)#else#define __SNMP_INC_STATS64(mib, field) __SNMP_INC_STATS(mib, field)#define SNMP_INC_STATS64(mib, field) SNMP_INC_STATS(mib, field)#define SNMP_DEC_STATS64(mib, field) SNMP_DEC_STATS(mib, field)#define __SNMP_ADD_STATS64(mib, field, addend) __SNMP_ADD_STATS(mib, field, addend)#define SNMP_ADD_STATS64(mib, field, addend) SNMP_ADD_STATS(mib, field, addend)#define SNMP_UPD_PO_STATS64(mib, basefield, addend) SNMP_UPD_PO_STATS(mib, basefield, addend)#define __SNMP_UPD_PO_STATS64(mib, basefield, addend) __SNMP_UPD_PO_STATS(mib, basefield, addend)#endif
#endif