Commit | Line | Data |
---|---|---|
1da177e4 LT |
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 | * | |
1da177e4 LT |
17 | */ |
18 | ||
19 | #ifndef _SNMP_H | |
20 | #define _SNMP_H | |
21 | ||
22 | #include <linux/cache.h> | |
23 | #include <linux/snmp.h> | |
d647b36a | 24 | #include <linux/smp.h> |
1da177e4 LT |
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 | */ | |
34 | struct snmp_mib { | |
5833929c | 35 | const char *name; |
1da177e4 LT |
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 | /* | |
4ce3c183 | 50 | * We use unsigned longs for most mibs but u64 for ipstats. |
1da177e4 | 51 | */ |
4ce3c183 | 52 | #include <linux/u64_stats_sync.h> |
1da177e4 | 53 | |
1da177e4 LT |
54 | /* IPstats */ |
55 | #define IPSTATS_MIB_MAX __IPSTATS_MIB_MAX | |
56 | struct ipstats_mib { | |
4ce3c183 ED |
57 | /* mibs[] must be first field of struct ipstats_mib */ |
58 | u64 mibs[IPSTATS_MIB_MAX]; | |
59 | struct u64_stats_sync syncp; | |
ec733b15 | 60 | }; |
1da177e4 LT |
61 | |
62 | /* ICMP */ | |
a9527a3b | 63 | #define ICMP_MIB_MAX __ICMP_MIB_MAX |
1da177e4 LT |
64 | struct icmp_mib { |
65 | unsigned long mibs[ICMP_MIB_MAX]; | |
ec733b15 | 66 | }; |
1da177e4 | 67 | |
96793b48 DS |
68 | #define ICMPMSG_MIB_MAX __ICMPMSG_MIB_MAX |
69 | struct icmpmsg_mib { | |
acb32ba3 | 70 | atomic_long_t mibs[ICMPMSG_MIB_MAX]; |
ec733b15 | 71 | }; |
96793b48 | 72 | |
1da177e4 LT |
73 | /* ICMP6 (IPv6-ICMP) */ |
74 | #define ICMP6_MIB_MAX __ICMP6_MIB_MAX | |
be281e55 | 75 | /* per network ns counters */ |
1da177e4 LT |
76 | struct icmpv6_mib { |
77 | unsigned long mibs[ICMP6_MIB_MAX]; | |
ec733b15 | 78 | }; |
be281e55 ED |
79 | /* per device counters, (shared on all cpus) */ |
80 | struct icmpv6_mib_device { | |
81 | atomic_long_t mibs[ICMP6_MIB_MAX]; | |
82 | }; | |
1da177e4 | 83 | |
14878f75 | 84 | #define ICMP6MSG_MIB_MAX __ICMP6MSG_MIB_MAX |
be281e55 | 85 | /* per network ns counters */ |
14878f75 | 86 | struct icmpv6msg_mib { |
2a24444f | 87 | atomic_long_t mibs[ICMP6MSG_MIB_MAX]; |
ec733b15 | 88 | }; |
be281e55 ED |
89 | /* per device counters, (shared on all cpus) */ |
90 | struct icmpv6msg_mib_device { | |
91 | atomic_long_t mibs[ICMP6MSG_MIB_MAX]; | |
92 | }; | |
14878f75 DS |
93 | |
94 | ||
1da177e4 LT |
95 | /* TCP */ |
96 | #define TCP_MIB_MAX __TCP_MIB_MAX | |
97 | struct tcp_mib { | |
98 | unsigned long mibs[TCP_MIB_MAX]; | |
ec733b15 | 99 | }; |
1da177e4 LT |
100 | |
101 | /* UDP */ | |
102 | #define UDP_MIB_MAX __UDP_MIB_MAX | |
103 | struct udp_mib { | |
104 | unsigned long mibs[UDP_MIB_MAX]; | |
ec733b15 | 105 | }; |
1da177e4 | 106 | |
1da177e4 LT |
107 | /* Linux */ |
108 | #define LINUX_MIB_MAX __LINUX_MIB_MAX | |
109 | struct linux_mib { | |
110 | unsigned long mibs[LINUX_MIB_MAX]; | |
111 | }; | |
112 | ||
558f82ef MN |
113 | /* Linux Xfrm */ |
114 | #define LINUX_MIB_XFRMMAX __LINUX_MIB_XFRMMAX | |
115 | struct linux_xfrm_mib { | |
116 | unsigned long mibs[LINUX_MIB_XFRMMAX]; | |
117 | }; | |
1da177e4 | 118 | |
1da177e4 | 119 | #define DEFINE_SNMP_STAT(type, name) \ |
698365fa | 120 | __typeof__(type) __percpu *name |
be281e55 ED |
121 | #define DEFINE_SNMP_STAT_ATOMIC(type, name) \ |
122 | __typeof__(type) *name | |
1da177e4 | 123 | #define DECLARE_SNMP_STAT(type, name) \ |
698365fa | 124 | extern __typeof__(type) __percpu *name |
1da177e4 | 125 | |
4eb41d10 | 126 | #define SNMP_INC_STATS_BH(mib, field) \ |
698365fa | 127 | __this_cpu_inc(mib->mibs[field]) |
8f0ea0fe | 128 | |
4eb41d10 | 129 | #define SNMP_INC_STATS_USER(mib, field) \ |
698365fa | 130 | this_cpu_inc(mib->mibs[field]) |
8f0ea0fe | 131 | |
be281e55 ED |
132 | #define SNMP_INC_STATS_ATOMIC_LONG(mib, field) \ |
133 | atomic_long_inc(&mib->mibs[field]) | |
8f0ea0fe | 134 | |
4eb41d10 | 135 | #define SNMP_INC_STATS(mib, field) \ |
698365fa | 136 | this_cpu_inc(mib->mibs[field]) |
8f0ea0fe | 137 | |
4eb41d10 | 138 | #define SNMP_DEC_STATS(mib, field) \ |
698365fa | 139 | this_cpu_dec(mib->mibs[field]) |
8f0ea0fe | 140 | |
4eb41d10 | 141 | #define SNMP_ADD_STATS_BH(mib, field, addend) \ |
698365fa | 142 | __this_cpu_add(mib->mibs[field], addend) |
8f0ea0fe | 143 | |
4eb41d10 | 144 | #define SNMP_ADD_STATS_USER(mib, field, addend) \ |
698365fa | 145 | this_cpu_add(mib->mibs[field], addend) |
8f0ea0fe | 146 | |
aa2ea058 | 147 | #define SNMP_ADD_STATS(mib, field, addend) \ |
698365fa | 148 | this_cpu_add(mib->mibs[field], addend) |
edf391ff NH |
149 | #define SNMP_UPD_PO_STATS(mib, basefield, addend) \ |
150 | do { \ | |
54003f11 | 151 | __typeof__((mib->mibs) + 0) ptr = mib->mibs; \ |
d25398df ED |
152 | this_cpu_inc(ptr[basefield##PKTS]); \ |
153 | this_cpu_add(ptr[basefield##OCTETS], addend); \ | |
edf391ff NH |
154 | } while (0) |
155 | #define SNMP_UPD_PO_STATS_BH(mib, basefield, addend) \ | |
156 | do { \ | |
54003f11 | 157 | __typeof__((mib->mibs) + 0) ptr = mib->mibs; \ |
d25398df ED |
158 | __this_cpu_inc(ptr[basefield##PKTS]); \ |
159 | __this_cpu_add(ptr[basefield##OCTETS], addend); \ | |
edf391ff | 160 | } while (0) |
4ce3c183 ED |
161 | |
162 | ||
163 | #if BITS_PER_LONG==32 | |
164 | ||
165 | #define SNMP_ADD_STATS64_BH(mib, field, addend) \ | |
166 | do { \ | |
903ceff7 | 167 | __typeof__(*mib) *ptr = raw_cpu_ptr(mib); \ |
4ce3c183 ED |
168 | u64_stats_update_begin(&ptr->syncp); \ |
169 | ptr->mibs[field] += addend; \ | |
170 | u64_stats_update_end(&ptr->syncp); \ | |
171 | } while (0) | |
8f0ea0fe | 172 | |
4ce3c183 ED |
173 | #define SNMP_ADD_STATS64_USER(mib, field, addend) \ |
174 | do { \ | |
8f0ea0fe ED |
175 | local_bh_disable(); \ |
176 | SNMP_ADD_STATS64_BH(mib, field, addend); \ | |
177 | local_bh_enable(); \ | |
4ce3c183 | 178 | } while (0) |
8f0ea0fe | 179 | |
4ce3c183 | 180 | #define SNMP_ADD_STATS64(mib, field, addend) \ |
8f0ea0fe ED |
181 | SNMP_ADD_STATS64_USER(mib, field, addend) |
182 | ||
4ce3c183 ED |
183 | #define SNMP_INC_STATS64_BH(mib, field) SNMP_ADD_STATS64_BH(mib, field, 1) |
184 | #define SNMP_INC_STATS64_USER(mib, field) SNMP_ADD_STATS64_USER(mib, field, 1) | |
185 | #define SNMP_INC_STATS64(mib, field) SNMP_ADD_STATS64(mib, field, 1) | |
4ce3c183 ED |
186 | #define SNMP_UPD_PO_STATS64_BH(mib, basefield, addend) \ |
187 | do { \ | |
903ceff7 CL |
188 | __typeof__(*mib) *ptr; \ |
189 | ptr = raw_cpu_ptr((mib)); \ | |
4ce3c183 ED |
190 | u64_stats_update_begin(&ptr->syncp); \ |
191 | ptr->mibs[basefield##PKTS]++; \ | |
192 | ptr->mibs[basefield##OCTETS] += addend; \ | |
193 | u64_stats_update_end(&ptr->syncp); \ | |
194 | } while (0) | |
8f0ea0fe ED |
195 | #define SNMP_UPD_PO_STATS64(mib, basefield, addend) \ |
196 | do { \ | |
197 | local_bh_disable(); \ | |
198 | SNMP_UPD_PO_STATS64_BH(mib, basefield, addend); \ | |
199 | local_bh_enable(); \ | |
200 | } while (0) | |
4ce3c183 ED |
201 | #else |
202 | #define SNMP_INC_STATS64_BH(mib, field) SNMP_INC_STATS_BH(mib, field) | |
203 | #define SNMP_INC_STATS64_USER(mib, field) SNMP_INC_STATS_USER(mib, field) | |
204 | #define SNMP_INC_STATS64(mib, field) SNMP_INC_STATS(mib, field) | |
205 | #define SNMP_DEC_STATS64(mib, field) SNMP_DEC_STATS(mib, field) | |
206 | #define SNMP_ADD_STATS64_BH(mib, field, addend) SNMP_ADD_STATS_BH(mib, field, addend) | |
207 | #define SNMP_ADD_STATS64_USER(mib, field, addend) SNMP_ADD_STATS_USER(mib, field, addend) | |
208 | #define SNMP_ADD_STATS64(mib, field, addend) SNMP_ADD_STATS(mib, field, addend) | |
209 | #define SNMP_UPD_PO_STATS64(mib, basefield, addend) SNMP_UPD_PO_STATS(mib, basefield, addend) | |
210 | #define SNMP_UPD_PO_STATS64_BH(mib, basefield, addend) SNMP_UPD_PO_STATS_BH(mib, basefield, addend) | |
211 | #endif | |
212 | ||
1da177e4 | 213 | #endif |