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1/*
2 *
3 * SNMP MIB entries for the IP subsystem.
4 *
5 * Alan Cox <gw4pts@gw4pts.ampr.org>
6 *
7 * We don't chose to implement SNMP in the kernel (this would
8 * be silly as SNMP is a pain in the backside in places). We do
9 * however need to collect the MIB statistics and export them
10 * out of /proc (eventually)
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version
15 * 2 of the License, or (at your option) any later version.
16 *
17 */
18
19#ifndef _SNMP_H
20#define _SNMP_H
21
22#include <linux/cache.h>
23#include <linux/snmp.h>
24#include <linux/smp.h>
25
26/*
27 * Mibs are stored in array of unsigned long.
28 */
29/*
30 * struct snmp_mib{}
31 * - list of entries for particular API (such as /proc/net/snmp)
32 * - name of entries.
33 */
34struct snmp_mib {
35 const char *name;
36 int entry;
37};
38
39#define SNMP_MIB_ITEM(_name,_entry) { \
40 .name = _name, \
41 .entry = _entry, \
42}
43
44#define SNMP_MIB_SENTINEL { \
45 .name = NULL, \
46 .entry = 0, \
47}
48
49/*
50 * We use unsigned longs for most mibs but u64 for ipstats.
51 */
52#include <linux/u64_stats_sync.h>
53
54/* IPstats */
55#define IPSTATS_MIB_MAX __IPSTATS_MIB_MAX
56struct ipstats_mib {
57 /* mibs[] must be first field of struct ipstats_mib */
58 u64 mibs[IPSTATS_MIB_MAX];
59 struct u64_stats_sync syncp;
60};
61
62/* ICMP */
63#define ICMP_MIB_MAX __ICMP_MIB_MAX
64struct icmp_mib {
65 unsigned long mibs[ICMP_MIB_MAX];
66};
67
68#define ICMPMSG_MIB_MAX __ICMPMSG_MIB_MAX
69struct icmpmsg_mib {
70 unsigned long mibs[ICMPMSG_MIB_MAX];
71};
72
73/* ICMP6 (IPv6-ICMP) */
74#define ICMP6_MIB_MAX __ICMP6_MIB_MAX
75/* per network ns counters */
76struct icmpv6_mib {
77 unsigned long mibs[ICMP6_MIB_MAX];
78};
79/* per device counters, (shared on all cpus) */
80struct icmpv6_mib_device {
81 atomic_long_t mibs[ICMP6_MIB_MAX];
82};
83
84#define ICMP6MSG_MIB_MAX __ICMP6MSG_MIB_MAX
85/* per network ns counters */
86struct icmpv6msg_mib {
87 unsigned long mibs[ICMP6MSG_MIB_MAX];
88};
89/* per device counters, (shared on all cpus) */
90struct icmpv6msg_mib_device {
91 atomic_long_t mibs[ICMP6MSG_MIB_MAX];
92};
93
94
95/* TCP */
96#define TCP_MIB_MAX __TCP_MIB_MAX
97struct tcp_mib {
98 unsigned long mibs[TCP_MIB_MAX];
99};
100
101/* UDP */
102#define UDP_MIB_MAX __UDP_MIB_MAX
103struct udp_mib {
104 unsigned long mibs[UDP_MIB_MAX];
105};
106
107/* Linux */
108#define LINUX_MIB_MAX __LINUX_MIB_MAX
109struct linux_mib {
110 unsigned long mibs[LINUX_MIB_MAX];
111};
112
113/* Linux Xfrm */
114#define LINUX_MIB_XFRMMAX __LINUX_MIB_XFRMMAX
115struct linux_xfrm_mib {
116 unsigned long mibs[LINUX_MIB_XFRMMAX];
117};
118
119#define SNMP_ARRAY_SZ 1
120
121#define DEFINE_SNMP_STAT(type, name) \
122 __typeof__(type) __percpu *name[SNMP_ARRAY_SZ]
123#define DEFINE_SNMP_STAT_ATOMIC(type, name) \
124 __typeof__(type) *name
125#define DECLARE_SNMP_STAT(type, name) \
126 extern __typeof__(type) __percpu *name[SNMP_ARRAY_SZ]
127
128#define SNMP_INC_STATS_BH(mib, field) \
129 __this_cpu_inc(mib[0]->mibs[field])
130
131#define SNMP_INC_STATS_USER(mib, field) \
132 irqsafe_cpu_inc(mib[0]->mibs[field])
133
134#define SNMP_INC_STATS_ATOMIC_LONG(mib, field) \
135 atomic_long_inc(&mib->mibs[field])
136
137#define SNMP_INC_STATS(mib, field) \
138 irqsafe_cpu_inc(mib[0]->mibs[field])
139
140#define SNMP_DEC_STATS(mib, field) \
141 irqsafe_cpu_dec(mib[0]->mibs[field])
142
143#define SNMP_ADD_STATS_BH(mib, field, addend) \
144 __this_cpu_add(mib[0]->mibs[field], addend)
145
146#define SNMP_ADD_STATS_USER(mib, field, addend) \
147 irqsafe_cpu_add(mib[0]->mibs[field], addend)
148
149#define SNMP_ADD_STATS(mib, field, addend) \
150 irqsafe_cpu_add(mib[0]->mibs[field], addend)
151/*
152 * Use "__typeof__(*mib[0]) *ptr" instead of "__typeof__(mib[0]) ptr"
153 * to make @ptr a non-percpu pointer.
154 */
155#define SNMP_UPD_PO_STATS(mib, basefield, addend) \
156 do { \
157 irqsafe_cpu_inc(mib[0]->mibs[basefield##PKTS]); \
158 irqsafe_cpu_add(mib[0]->mibs[basefield##OCTETS], addend); \
159 } while (0)
160#define SNMP_UPD_PO_STATS_BH(mib, basefield, addend) \
161 do { \
162 __this_cpu_inc(mib[0]->mibs[basefield##PKTS]); \
163 __this_cpu_add(mib[0]->mibs[basefield##OCTETS], addend); \
164 } while (0)
165
166
167#if BITS_PER_LONG==32
168
169#define SNMP_ADD_STATS64_BH(mib, field, addend) \
170 do { \
171 __typeof__(*mib[0]) *ptr = __this_cpu_ptr((mib)[0]); \
172 u64_stats_update_begin(&ptr->syncp); \
173 ptr->mibs[field] += addend; \
174 u64_stats_update_end(&ptr->syncp); \
175 } while (0)
176
177#define SNMP_ADD_STATS64_USER(mib, field, addend) \
178 do { \
179 local_bh_disable(); \
180 SNMP_ADD_STATS64_BH(mib, field, addend); \
181 local_bh_enable(); \
182 } while (0)
183
184#define SNMP_ADD_STATS64(mib, field, addend) \
185 SNMP_ADD_STATS64_USER(mib, field, addend)
186
187#define SNMP_INC_STATS64_BH(mib, field) SNMP_ADD_STATS64_BH(mib, field, 1)
188#define SNMP_INC_STATS64_USER(mib, field) SNMP_ADD_STATS64_USER(mib, field, 1)
189#define SNMP_INC_STATS64(mib, field) SNMP_ADD_STATS64(mib, field, 1)
190#define SNMP_UPD_PO_STATS64_BH(mib, basefield, addend) \
191 do { \
192 __typeof__(*mib[0]) *ptr; \
193 ptr = __this_cpu_ptr((mib)[0]); \
194 u64_stats_update_begin(&ptr->syncp); \
195 ptr->mibs[basefield##PKTS]++; \
196 ptr->mibs[basefield##OCTETS] += addend; \
197 u64_stats_update_end(&ptr->syncp); \
198 } while (0)
199#define SNMP_UPD_PO_STATS64(mib, basefield, addend) \
200 do { \
201 local_bh_disable(); \
202 SNMP_UPD_PO_STATS64_BH(mib, basefield, addend); \
203 local_bh_enable(); \
204 } while (0)
205#else
206#define SNMP_INC_STATS64_BH(mib, field) SNMP_INC_STATS_BH(mib, field)
207#define SNMP_INC_STATS64_USER(mib, field) SNMP_INC_STATS_USER(mib, field)
208#define SNMP_INC_STATS64(mib, field) SNMP_INC_STATS(mib, field)
209#define SNMP_DEC_STATS64(mib, field) SNMP_DEC_STATS(mib, field)
210#define SNMP_ADD_STATS64_BH(mib, field, addend) SNMP_ADD_STATS_BH(mib, field, addend)
211#define SNMP_ADD_STATS64_USER(mib, field, addend) SNMP_ADD_STATS_USER(mib, field, addend)
212#define SNMP_ADD_STATS64(mib, field, addend) SNMP_ADD_STATS(mib, field, addend)
213#define SNMP_UPD_PO_STATS64(mib, basefield, addend) SNMP_UPD_PO_STATS(mib, basefield, addend)
214#define SNMP_UPD_PO_STATS64_BH(mib, basefield, addend) SNMP_UPD_PO_STATS_BH(mib, basefield, addend)
215#endif
216
217#endif
1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 *
4 * SNMP MIB entries for the IP subsystem.
5 *
6 * Alan Cox <gw4pts@gw4pts.ampr.org>
7 *
8 * We don't chose to implement SNMP in the kernel (this would
9 * be silly as SNMP is a pain in the backside in places). We do
10 * however need to collect the MIB statistics and export them
11 * out of /proc (eventually)
12 */
13
14#ifndef _SNMP_H
15#define _SNMP_H
16
17#include <linux/cache.h>
18#include <linux/snmp.h>
19#include <linux/smp.h>
20
21/*
22 * Mibs are stored in array of unsigned long.
23 */
24/*
25 * struct snmp_mib{}
26 * - list of entries for particular API (such as /proc/net/snmp)
27 * - name of entries.
28 */
29struct snmp_mib {
30 const char *name;
31 int entry;
32};
33
34#define SNMP_MIB_ITEM(_name,_entry) { \
35 .name = _name, \
36 .entry = _entry, \
37}
38
39#define SNMP_MIB_SENTINEL { \
40 .name = NULL, \
41 .entry = 0, \
42}
43
44/*
45 * We use unsigned longs for most mibs but u64 for ipstats.
46 */
47#include <linux/u64_stats_sync.h>
48
49/* IPstats */
50#define IPSTATS_MIB_MAX __IPSTATS_MIB_MAX
51struct ipstats_mib {
52 /* mibs[] must be first field of struct ipstats_mib */
53 u64 mibs[IPSTATS_MIB_MAX];
54 struct u64_stats_sync syncp;
55};
56
57/* ICMP */
58#define ICMP_MIB_MAX __ICMP_MIB_MAX
59struct icmp_mib {
60 unsigned long mibs[ICMP_MIB_MAX];
61};
62
63#define ICMPMSG_MIB_MAX __ICMPMSG_MIB_MAX
64struct icmpmsg_mib {
65 atomic_long_t mibs[ICMPMSG_MIB_MAX];
66};
67
68/* ICMP6 (IPv6-ICMP) */
69#define ICMP6_MIB_MAX __ICMP6_MIB_MAX
70/* per network ns counters */
71struct icmpv6_mib {
72 unsigned long mibs[ICMP6_MIB_MAX];
73};
74/* per device counters, (shared on all cpus) */
75struct icmpv6_mib_device {
76 atomic_long_t mibs[ICMP6_MIB_MAX];
77};
78
79#define ICMP6MSG_MIB_MAX __ICMP6MSG_MIB_MAX
80/* per network ns counters */
81struct icmpv6msg_mib {
82 atomic_long_t mibs[ICMP6MSG_MIB_MAX];
83};
84/* per device counters, (shared on all cpus) */
85struct icmpv6msg_mib_device {
86 atomic_long_t mibs[ICMP6MSG_MIB_MAX];
87};
88
89
90/* TCP */
91#define TCP_MIB_MAX __TCP_MIB_MAX
92struct tcp_mib {
93 unsigned long mibs[TCP_MIB_MAX];
94};
95
96/* UDP */
97#define UDP_MIB_MAX __UDP_MIB_MAX
98struct udp_mib {
99 unsigned long mibs[UDP_MIB_MAX];
100};
101
102/* Linux */
103#define LINUX_MIB_MAX __LINUX_MIB_MAX
104struct linux_mib {
105 unsigned long mibs[LINUX_MIB_MAX];
106};
107
108/* Linux Xfrm */
109#define LINUX_MIB_XFRMMAX __LINUX_MIB_XFRMMAX
110struct linux_xfrm_mib {
111 unsigned long mibs[LINUX_MIB_XFRMMAX];
112};
113
114/* Linux TLS */
115#define LINUX_MIB_TLSMAX __LINUX_MIB_TLSMAX
116struct linux_tls_mib {
117 unsigned long mibs[LINUX_MIB_TLSMAX];
118};
119
120#define DEFINE_SNMP_STAT(type, name) \
121 __typeof__(type) __percpu *name
122#define DEFINE_SNMP_STAT_ATOMIC(type, name) \
123 __typeof__(type) *name
124#define DECLARE_SNMP_STAT(type, name) \
125 extern __typeof__(type) __percpu *name
126
127#define __SNMP_INC_STATS(mib, field) \
128 __this_cpu_inc(mib->mibs[field])
129
130#define SNMP_INC_STATS_ATOMIC_LONG(mib, field) \
131 atomic_long_inc(&mib->mibs[field])
132
133#define SNMP_INC_STATS(mib, field) \
134 this_cpu_inc(mib->mibs[field])
135
136#define SNMP_DEC_STATS(mib, field) \
137 this_cpu_dec(mib->mibs[field])
138
139#define __SNMP_ADD_STATS(mib, field, addend) \
140 __this_cpu_add(mib->mibs[field], addend)
141
142#define SNMP_ADD_STATS(mib, field, addend) \
143 this_cpu_add(mib->mibs[field], addend)
144#define SNMP_UPD_PO_STATS(mib, basefield, addend) \
145 do { \
146 __typeof__((mib->mibs) + 0) ptr = mib->mibs; \
147 this_cpu_inc(ptr[basefield##PKTS]); \
148 this_cpu_add(ptr[basefield##OCTETS], addend); \
149 } while (0)
150#define __SNMP_UPD_PO_STATS(mib, basefield, addend) \
151 do { \
152 __typeof__((mib->mibs) + 0) ptr = mib->mibs; \
153 __this_cpu_inc(ptr[basefield##PKTS]); \
154 __this_cpu_add(ptr[basefield##OCTETS], addend); \
155 } while (0)
156
157
158#if BITS_PER_LONG==32
159
160#define __SNMP_ADD_STATS64(mib, field, addend) \
161 do { \
162 __typeof__(*mib) *ptr = raw_cpu_ptr(mib); \
163 u64_stats_update_begin(&ptr->syncp); \
164 ptr->mibs[field] += addend; \
165 u64_stats_update_end(&ptr->syncp); \
166 } while (0)
167
168#define SNMP_ADD_STATS64(mib, field, addend) \
169 do { \
170 local_bh_disable(); \
171 __SNMP_ADD_STATS64(mib, field, addend); \
172 local_bh_enable(); \
173 } while (0)
174
175#define __SNMP_INC_STATS64(mib, field) SNMP_ADD_STATS64(mib, field, 1)
176#define SNMP_INC_STATS64(mib, field) SNMP_ADD_STATS64(mib, field, 1)
177#define __SNMP_UPD_PO_STATS64(mib, basefield, addend) \
178 do { \
179 __typeof__(*mib) *ptr; \
180 ptr = raw_cpu_ptr((mib)); \
181 u64_stats_update_begin(&ptr->syncp); \
182 ptr->mibs[basefield##PKTS]++; \
183 ptr->mibs[basefield##OCTETS] += addend; \
184 u64_stats_update_end(&ptr->syncp); \
185 } while (0)
186#define SNMP_UPD_PO_STATS64(mib, basefield, addend) \
187 do { \
188 local_bh_disable(); \
189 __SNMP_UPD_PO_STATS64(mib, basefield, addend); \
190 local_bh_enable(); \
191 } while (0)
192#else
193#define __SNMP_INC_STATS64(mib, field) __SNMP_INC_STATS(mib, field)
194#define SNMP_INC_STATS64(mib, field) SNMP_INC_STATS(mib, field)
195#define SNMP_DEC_STATS64(mib, field) SNMP_DEC_STATS(mib, field)
196#define __SNMP_ADD_STATS64(mib, field, addend) __SNMP_ADD_STATS(mib, field, addend)
197#define SNMP_ADD_STATS64(mib, field, addend) SNMP_ADD_STATS(mib, field, addend)
198#define SNMP_UPD_PO_STATS64(mib, basefield, addend) SNMP_UPD_PO_STATS(mib, basefield, addend)
199#define __SNMP_UPD_PO_STATS64(mib, basefield, addend) __SNMP_UPD_PO_STATS(mib, basefield, addend)
200#endif
201
202#endif