Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | */ |
| 18 | |
| 19 | #ifndef _SNMP_H |
| 20 | #define _SNMP_H |
| 21 | |
| 22 | #include <linux/cache.h> |
| 23 | #include <linux/snmp.h> |
Herbert Xu | d647b36 | 2007-12-20 04:13:21 -0800 | [diff] [blame] | 24 | #include <linux/smp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 { |
Alexey Dobriyan | 5833929 | 2010-01-22 10:17:26 +0000 | [diff] [blame] | 35 | const char *name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 all unsigned longs. Linux will soon be so reliable that even |
| 51 | * these will rapidly get too small 8-). Seriously consider the IpInReceives |
| 52 | * count on the 20Gb/s + networks people expect in a few years time! |
| 53 | */ |
| 54 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | /* IPstats */ |
| 56 | #define IPSTATS_MIB_MAX __IPSTATS_MIB_MAX |
| 57 | struct ipstats_mib { |
| 58 | unsigned long mibs[IPSTATS_MIB_MAX]; |
Eric Dumazet | ec733b15 | 2010-03-18 20:36:06 +0000 | [diff] [blame] | 59 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | |
| 61 | /* ICMP */ |
| 62 | #define ICMP_MIB_DUMMY __ICMP_MIB_MAX |
| 63 | #define ICMP_MIB_MAX (__ICMP_MIB_MAX + 1) |
| 64 | |
| 65 | struct icmp_mib { |
| 66 | unsigned long mibs[ICMP_MIB_MAX]; |
Eric Dumazet | ec733b15 | 2010-03-18 20:36:06 +0000 | [diff] [blame] | 67 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | |
David L Stevens | 96793b4 | 2007-09-17 09:57:33 -0700 | [diff] [blame] | 69 | #define ICMPMSG_MIB_MAX __ICMPMSG_MIB_MAX |
| 70 | struct icmpmsg_mib { |
| 71 | unsigned long mibs[ICMPMSG_MIB_MAX]; |
Eric Dumazet | ec733b15 | 2010-03-18 20:36:06 +0000 | [diff] [blame] | 72 | }; |
David L Stevens | 96793b4 | 2007-09-17 09:57:33 -0700 | [diff] [blame] | 73 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | /* ICMP6 (IPv6-ICMP) */ |
| 75 | #define ICMP6_MIB_MAX __ICMP6_MIB_MAX |
| 76 | struct icmpv6_mib { |
| 77 | unsigned long mibs[ICMP6_MIB_MAX]; |
Eric Dumazet | ec733b15 | 2010-03-18 20:36:06 +0000 | [diff] [blame] | 78 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | |
David L Stevens | 14878f7 | 2007-09-16 16:52:35 -0700 | [diff] [blame] | 80 | #define ICMP6MSG_MIB_MAX __ICMP6MSG_MIB_MAX |
| 81 | struct icmpv6msg_mib { |
| 82 | unsigned long mibs[ICMP6MSG_MIB_MAX]; |
Eric Dumazet | ec733b15 | 2010-03-18 20:36:06 +0000 | [diff] [blame] | 83 | }; |
David L Stevens | 14878f7 | 2007-09-16 16:52:35 -0700 | [diff] [blame] | 84 | |
| 85 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | /* TCP */ |
| 87 | #define TCP_MIB_MAX __TCP_MIB_MAX |
| 88 | struct tcp_mib { |
| 89 | unsigned long mibs[TCP_MIB_MAX]; |
Eric Dumazet | ec733b15 | 2010-03-18 20:36:06 +0000 | [diff] [blame] | 90 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | |
| 92 | /* UDP */ |
| 93 | #define UDP_MIB_MAX __UDP_MIB_MAX |
| 94 | struct udp_mib { |
| 95 | unsigned long mibs[UDP_MIB_MAX]; |
Eric Dumazet | ec733b15 | 2010-03-18 20:36:06 +0000 | [diff] [blame] | 96 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | /* Linux */ |
| 99 | #define LINUX_MIB_MAX __LINUX_MIB_MAX |
| 100 | struct linux_mib { |
| 101 | unsigned long mibs[LINUX_MIB_MAX]; |
| 102 | }; |
| 103 | |
Masahide NAKAMURA | 558f82e | 2007-12-20 20:42:57 -0800 | [diff] [blame] | 104 | /* Linux Xfrm */ |
| 105 | #define LINUX_MIB_XFRMMAX __LINUX_MIB_XFRMMAX |
| 106 | struct linux_xfrm_mib { |
| 107 | unsigned long mibs[LINUX_MIB_XFRMMAX]; |
| 108 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | |
| 110 | /* |
| 111 | * FIXME: On x86 and some other CPUs the split into user and softirq parts |
| 112 | * is not needed because addl $1,memory is atomic against interrupts (but |
| 113 | * atomic_inc would be overkill because of the lock cycles). Wants new |
| 114 | * nonlocked_atomic_inc() primitives -AK |
| 115 | */ |
| 116 | #define DEFINE_SNMP_STAT(type, name) \ |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 117 | __typeof__(type) __percpu *name[2] |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | #define DECLARE_SNMP_STAT(type, name) \ |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 119 | extern __typeof__(type) __percpu *name[2] |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | |
| 121 | #define SNMP_STAT_BHPTR(name) (name[0]) |
| 122 | #define SNMP_STAT_USRPTR(name) (name[1]) |
| 123 | |
Christoph Lameter | 4eb41d1 | 2009-10-03 19:48:22 +0900 | [diff] [blame] | 124 | #define SNMP_INC_STATS_BH(mib, field) \ |
| 125 | __this_cpu_inc(mib[0]->mibs[field]) |
| 126 | #define SNMP_INC_STATS_USER(mib, field) \ |
| 127 | this_cpu_inc(mib[1]->mibs[field]) |
| 128 | #define SNMP_INC_STATS(mib, field) \ |
| 129 | this_cpu_inc(mib[!in_softirq()]->mibs[field]) |
| 130 | #define SNMP_DEC_STATS(mib, field) \ |
| 131 | this_cpu_dec(mib[!in_softirq()]->mibs[field]) |
| 132 | #define SNMP_ADD_STATS_BH(mib, field, addend) \ |
| 133 | __this_cpu_add(mib[0]->mibs[field], addend) |
| 134 | #define SNMP_ADD_STATS_USER(mib, field, addend) \ |
| 135 | this_cpu_add(mib[1]->mibs[field], addend) |
Tom Herbert | aa2ea05 | 2010-04-22 07:00:24 +0000 | [diff] [blame] | 136 | #define SNMP_ADD_STATS(mib, field, addend) \ |
Eric Dumazet | 8f1c14b | 2010-06-23 00:32:03 +0000 | [diff] [blame] | 137 | this_cpu_add(mib[!in_softirq()]->mibs[field], addend) |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 138 | /* |
| 139 | * Use "__typeof__(*mib[0]) *ptr" instead of "__typeof__(mib[0]) ptr" |
| 140 | * to make @ptr a non-percpu pointer. |
| 141 | */ |
Neil Horman | edf391f | 2009-04-27 02:45:02 -0700 | [diff] [blame] | 142 | #define SNMP_UPD_PO_STATS(mib, basefield, addend) \ |
| 143 | do { \ |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 144 | __typeof__(*mib[0]) *ptr; \ |
Christoph Lameter | 4eb41d1 | 2009-10-03 19:48:22 +0900 | [diff] [blame] | 145 | preempt_disable(); \ |
| 146 | ptr = this_cpu_ptr((mib)[!in_softirq()]); \ |
Neil Horman | edf391f | 2009-04-27 02:45:02 -0700 | [diff] [blame] | 147 | ptr->mibs[basefield##PKTS]++; \ |
| 148 | ptr->mibs[basefield##OCTETS] += addend;\ |
Christoph Lameter | 4eb41d1 | 2009-10-03 19:48:22 +0900 | [diff] [blame] | 149 | preempt_enable(); \ |
Neil Horman | edf391f | 2009-04-27 02:45:02 -0700 | [diff] [blame] | 150 | } while (0) |
| 151 | #define SNMP_UPD_PO_STATS_BH(mib, basefield, addend) \ |
| 152 | do { \ |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 153 | __typeof__(*mib[0]) *ptr = \ |
Christoph Lameter | 4eb41d1 | 2009-10-03 19:48:22 +0900 | [diff] [blame] | 154 | __this_cpu_ptr((mib)[!in_softirq()]); \ |
Neil Horman | edf391f | 2009-04-27 02:45:02 -0700 | [diff] [blame] | 155 | ptr->mibs[basefield##PKTS]++; \ |
| 156 | ptr->mibs[basefield##OCTETS] += addend;\ |
| 157 | } while (0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | #endif |