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https://github.com/edk2-porting/linux-next.git
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0429fbc0bd
Pull percpu consistent-ops changes from Tejun Heo: "Way back, before the current percpu allocator was implemented, static and dynamic percpu memory areas were allocated and handled separately and had their own accessors. The distinction has been gone for many years now; however, the now duplicate two sets of accessors remained with the pointer based ones - this_cpu_*() - evolving various other operations over time. During the process, we also accumulated other inconsistent operations. This pull request contains Christoph's patches to clean up the duplicate accessor situation. __get_cpu_var() uses are replaced with with this_cpu_ptr() and __this_cpu_ptr() with raw_cpu_ptr(). Unfortunately, the former sometimes is tricky thanks to C being a bit messy with the distinction between lvalues and pointers, which led to a rather ugly solution for cpumask_var_t involving the introduction of this_cpu_cpumask_var_ptr(). This converts most of the uses but not all. Christoph will follow up with the remaining conversions in this merge window and hopefully remove the obsolete accessors" * 'for-3.18-consistent-ops' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu: (38 commits) irqchip: Properly fetch the per cpu offset percpu: Resolve ambiguities in __get_cpu_var/cpumask_var_t -fix ia64: sn_nodepda cannot be assigned to after this_cpu conversion. Use __this_cpu_write. percpu: Resolve ambiguities in __get_cpu_var/cpumask_var_t Revert "powerpc: Replace __get_cpu_var uses" percpu: Remove __this_cpu_ptr clocksource: Replace __this_cpu_ptr with raw_cpu_ptr sparc: Replace __get_cpu_var uses avr32: Replace __get_cpu_var with __this_cpu_write blackfin: Replace __get_cpu_var uses tile: Use this_cpu_ptr() for hardware counters tile: Replace __get_cpu_var uses powerpc: Replace __get_cpu_var uses alpha: Replace __get_cpu_var ia64: Replace __get_cpu_var uses s390: cio driver &__get_cpu_var replacements s390: Replace __get_cpu_var uses mips: Replace __get_cpu_var uses MIPS: Replace __get_cpu_var uses in FPU emulator. arm: Replace __this_cpu_ptr with raw_cpu_ptr ...
214 lines
5.7 KiB
C
214 lines
5.7 KiB
C
/*
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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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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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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_BH(mib, field) \
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__this_cpu_inc(mib->mibs[field])
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#define SNMP_INC_STATS_USER(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_BH(mib, field, addend) \
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__this_cpu_add(mib->mibs[field], addend)
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#define SNMP_ADD_STATS_USER(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_BH(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_BH(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_USER(mib, field, addend) \
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do { \
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local_bh_disable(); \
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SNMP_ADD_STATS64_BH(mib, field, addend); \
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local_bh_enable(); \
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} while (0)
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#define SNMP_ADD_STATS64(mib, field, addend) \
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SNMP_ADD_STATS64_USER(mib, field, addend)
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#define SNMP_INC_STATS64_BH(mib, field) SNMP_ADD_STATS64_BH(mib, field, 1)
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#define SNMP_INC_STATS64_USER(mib, field) SNMP_ADD_STATS64_USER(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_BH(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_BH(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_BH(mib, field) SNMP_INC_STATS_BH(mib, field)
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#define SNMP_INC_STATS64_USER(mib, field) SNMP_INC_STATS_USER(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_BH(mib, field, addend) SNMP_ADD_STATS_BH(mib, field, addend)
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#define SNMP_ADD_STATS64_USER(mib, field, addend) SNMP_ADD_STATS_USER(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_BH(mib, basefield, addend) SNMP_UPD_PO_STATS_BH(mib, basefield, addend)
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#endif
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#endif
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