| #include <net-snmp/net-snmp-config.h> |
| #include <net-snmp/net-snmp-includes.h> |
| #include <net-snmp/agent/net-snmp-agent-includes.h> |
| #include <net-snmp/agent/auto_nlist.h> |
| |
| #include <net-snmp/agent/hardware/cpu.h> |
| #include "vmstat.h" |
| |
| FindVarMethod var_extensible_vmstat; |
| |
| |
| |
| void |
| init_vmstat(void) |
| { |
| const oid vmstat_oid[] = { NETSNMP_UCDAVIS_MIB, 11 }; |
| |
| DEBUGMSGTL(("vmstat", "Initializing\n")); |
| netsnmp_register_scalar_group( |
| netsnmp_create_handler_registration("vmstat", vmstat_handler, |
| vmstat_oid, OID_LENGTH(vmstat_oid), |
| HANDLER_CAN_RONLY), |
| MIBINDEX, CPURAWGUESTNICE); |
| } |
| |
| |
| int |
| vmstat_handler(netsnmp_mib_handler *handler, |
| netsnmp_handler_registration *reginfo, |
| netsnmp_agent_request_info *reqinfo, |
| netsnmp_request_info *requests) |
| { |
| oid obj; |
| unsigned long long value = 0; |
| char cp[300]; |
| netsnmp_cpu_info *info = netsnmp_cpu_get_byIdx( -1, 0 ); |
| |
| switch (reqinfo->mode) { |
| case MODE_GET: |
| obj = requests->requestvb->name[ requests->requestvb->name_length-2 ]; |
| |
| switch (obj) { |
| case MIBINDEX: /* dummy value */ |
| snmp_set_var_typed_integer(requests->requestvb, ASN_INTEGER, 1); |
| break; |
| |
| case ERRORNAME: /* dummy name */ |
| sprintf(cp, "systemStats"); |
| snmp_set_var_typed_value(requests->requestvb, ASN_OCTET_STR, |
| cp, strlen(cp)); |
| break; |
| |
| /* |
| case IOSENT: |
| long_ret = vmstat(iosent); |
| return ((u_char *) (&long_ret)); |
| case IORECEIVE: |
| long_ret = vmstat(ioreceive); |
| return ((u_char *) (&long_ret)); |
| case IORAWSENT: |
| long_ret = vmstat(rawiosent); |
| return ((u_char *) (&long_ret)); |
| case IORAWRECEIVE: |
| long_ret = vmstat(rawioreceive); |
| return ((u_char *) (&long_ret)); |
| */ |
| |
| /* |
| * Raw CPU statistics |
| * Taken directly from the (overall) cpu_info structure. |
| * |
| * XXX - Need some form of flag to skip objects that |
| * aren't supported on a given architecture. |
| */ |
| case CPURAWUSER: |
| snmp_set_var_typed_integer(requests->requestvb, ASN_COUNTER, |
| info->user_ticks & 0xffffffff); |
| break; |
| case CPURAWNICE: |
| snmp_set_var_typed_integer(requests->requestvb, ASN_COUNTER, |
| info->nice_ticks & 0xffffffff); |
| break; |
| case CPURAWSYSTEM: |
| /* |
| * Some architecture have traditionally reported a |
| * combination of CPU statistics for this object. |
| * The CPU HAL module uses 'sys2_ticks' for this, |
| * so use this value in preference to 'sys_ticks' |
| * if it has a non-zero value. |
| */ |
| snmp_set_var_typed_integer(requests->requestvb, ASN_COUNTER, |
| (info->sys2_ticks ? |
| info->sys2_ticks : |
| info->sys_ticks ) & 0xffffffff); |
| break; |
| case CPURAWIDLE: |
| snmp_set_var_typed_integer(requests->requestvb, ASN_COUNTER, |
| info->idle_ticks & 0xffffffff); |
| break; |
| case CPURAWWAIT: |
| snmp_set_var_typed_integer(requests->requestvb, ASN_COUNTER, |
| info->wait_ticks & 0xffffffff); |
| break; |
| case CPURAWKERNEL: |
| snmp_set_var_typed_integer(requests->requestvb, ASN_COUNTER, |
| info->kern_ticks & 0xffffffff); |
| break; |
| case CPURAWINTR: |
| snmp_set_var_typed_integer(requests->requestvb, ASN_COUNTER, |
| info->intrpt_ticks & 0xffffffff); |
| break; |
| case CPURAWSOFTIRQ: |
| snmp_set_var_typed_integer(requests->requestvb, ASN_COUNTER, |
| info->sirq_ticks & 0xffffffff); |
| break; |
| case CPURAWSTEAL: |
| snmp_set_var_typed_integer(requests->requestvb, ASN_COUNTER, |
| info->steal_ticks & 0xffffffff); |
| break; |
| case CPURAWGUEST: |
| snmp_set_var_typed_integer(requests->requestvb, ASN_COUNTER, |
| info->guest_ticks & 0xffffffff); |
| break; |
| case CPURAWGUESTNICE: |
| snmp_set_var_typed_integer(requests->requestvb, ASN_COUNTER, |
| info->guestnice_ticks & 0xffffffff); |
| break; |
| |
| /* |
| * 'Cooked' CPU statistics |
| * Percentage usage of the specified statistic calculated |
| * over the period (1 min) that history is being kept for. |
| * |
| * This is actually a change of behaviour for some architectures, |
| * but: |
| * a) It ensures consistency across all systems |
| * a) It matches the definition of the MIB objects |
| * |
| * Note that this value will only be reported once the agent |
| * has a full minute's history collected. |
| */ |
| case CPUUSER: |
| if ( info->history && info->history[0].total_hist ) { |
| value = (info->user_ticks - info->history[0].user_hist)*100; |
| if ( info->total_ticks - info->history[0].total_hist) |
| value /= (info->total_ticks - info->history[0].total_hist); |
| else |
| value = 0; /* or skip this entry */ |
| snmp_set_var_typed_integer(requests->requestvb, |
| ASN_INTEGER, value & 0x7fffffff); |
| } |
| break; |
| case CPUSYSTEM: |
| if ( info->history && info->history[0].total_hist ) { |
| /* or sys2_ticks ??? */ |
| value = (info->sys_ticks - info->history[0].sys_hist)*100; |
| if ( info->total_ticks - info->history[0].total_hist) |
| value /= (info->total_ticks - info->history[0].total_hist); |
| else |
| value = 0; /* or skip this entry */ |
| snmp_set_var_typed_integer(requests->requestvb, |
| ASN_INTEGER, value & 0x7fffffff); |
| } |
| break; |
| case CPUIDLE: |
| if ( info->history && info->history[0].total_hist ) { |
| value = (info->idle_ticks - info->history[0].idle_hist)*100; |
| if ( info->total_ticks - info->history[0].total_hist) |
| value /= (info->total_ticks - info->history[0].total_hist); |
| else |
| value = 0; /* or skip this entry */ |
| snmp_set_var_typed_integer(requests->requestvb, |
| ASN_INTEGER, value & 0x7fffffff); |
| } |
| break; |
| |
| /* |
| * Similarly for the Interrupt and Context switch statistics |
| * (raw and per-second, calculated over the last minute) |
| */ |
| case SYSRAWINTERRUPTS: |
| snmp_set_var_typed_integer(requests->requestvb, ASN_COUNTER, |
| info->nInterrupts & 0xffffffff); |
| break; |
| case SYSRAWCONTEXT: |
| snmp_set_var_typed_integer(requests->requestvb, ASN_COUNTER, |
| info->nCtxSwitches & 0xffffffff); |
| break; |
| case SYSINTERRUPTS: |
| if ( info->history && info->history[0].total_hist ) { |
| value = (info->nInterrupts - info->history[0].intr_hist)/60; |
| snmp_set_var_typed_integer(requests->requestvb, |
| ASN_INTEGER, value & 0x7fffffff); |
| } |
| break; |
| case SYSCONTEXT: |
| if ( info->history && info->history[0].total_hist ) { |
| value = (info->nCtxSwitches - info->history[0].ctx_hist)/60; |
| snmp_set_var_typed_integer(requests->requestvb, |
| ASN_INTEGER, value & 0x7fffffff); |
| } |
| break; |
| |
| /* |
| * Similarly for the Swap statistics... |
| */ |
| case RAWSWAPIN: |
| snmp_set_var_typed_integer(requests->requestvb, ASN_COUNTER, |
| info->swapIn & 0xffffffff); |
| break; |
| case RAWSWAPOUT: |
| snmp_set_var_typed_integer(requests->requestvb, ASN_COUNTER, |
| info->swapOut & 0xffffffff); |
| break; |
| case SWAPIN: |
| if ( info->history && info->history[0].total_hist ) { |
| value = (info->swapIn - info->history[0].swpi_hist)/60; |
| /* ??? value *= PAGE_SIZE; */ |
| snmp_set_var_typed_integer(requests->requestvb, |
| ASN_INTEGER, value & 0x7fffffff); |
| } |
| break; |
| case SWAPOUT: |
| if ( info->history && info->history[0].total_hist ) { |
| value = (info->swapOut - info->history[0].swpo_hist)/60; |
| /* ??? value *= PAGE_SIZE; */ |
| snmp_set_var_typed_integer(requests->requestvb, |
| ASN_INTEGER, value & 0x7fffffff); |
| } |
| break; |
| |
| /* |
| * ... and the I/O statistics. |
| */ |
| case IORAWSENT: |
| snmp_set_var_typed_integer(requests->requestvb, ASN_COUNTER, |
| info->pageOut & 0xffffffff); |
| break; |
| case IORAWRECEIVE: |
| snmp_set_var_typed_integer(requests->requestvb, ASN_COUNTER, |
| info->pageIn & 0xffffffff); |
| break; |
| case IOSENT: |
| if ( info->history && info->history[0].total_hist ) { |
| value = (info->pageOut - info->history[0].pageo_hist)/60; |
| snmp_set_var_typed_integer(requests->requestvb, |
| ASN_INTEGER, value & 0x7fffffff); |
| } |
| break; |
| case IORECEIVE: |
| if ( info->history && info->history[0].total_hist ) { |
| value = (info->pageIn - info->history[0].pagei_hist)/60; |
| snmp_set_var_typed_integer(requests->requestvb, |
| ASN_INTEGER, value & 0x7fffffff); |
| } |
| break; |
| |
| default: |
| /* |
| XXX - The systemStats group is "holely", so walking it would |
| trigger this message repeatedly. We really need a form |
| of the table column registration mechanism, that would |
| work with scalar groups. |
| snmp_log(LOG_ERR, |
| "unknown object (%d) in vmstat_handler\n", (int)obj); |
| */ |
| break; |
| } |
| break; |
| |
| default: |
| snmp_log(LOG_ERR, |
| "unknown mode (%d) in vmstat_handler\n", |
| reqinfo->mode); |
| return SNMP_ERR_GENERR; |
| } |
| |
| return SNMP_ERR_NOERROR; |
| } |
