| /* |
| * Host Resources MIB - storage group implementation - hrh_storage.c |
| * |
| */ |
| |
| #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/hardware/memory.h> |
| #include <net-snmp/agent/hardware/fsys.h> |
| #include "host_res.h" |
| #include "hrh_filesys.h" |
| #include "hrh_storage.h" |
| #include "hr_disk.h" |
| #include <net-snmp/utilities.h> |
| |
| |
| #include <sys/types.h> |
| #if HAVE_SYS_PARAM_H |
| #include <sys/param.h> |
| #endif |
| #if HAVE_UNISTD_H |
| #include <unistd.h> |
| #endif |
| #if TIME_WITH_SYS_TIME |
| # ifdef WIN32 |
| # include <windows.h> |
| # include <errno.h> |
| # include <sys/timeb.h> |
| # else |
| # include <sys/time.h> |
| # endif |
| # include <time.h> |
| #else |
| # if HAVE_SYS_TIME_H |
| # include <sys/time.h> |
| # else |
| # include <time.h> |
| # endif |
| #endif |
| |
| #if HAVE_FCNTL_H |
| #include <fcntl.h> |
| #endif |
| |
| #if HAVE_STRING_H |
| #include <string.h> |
| #else |
| #include <strings.h> |
| #endif |
| |
| #include <net-snmp/output_api.h> |
| |
| #include <net-snmp/agent/agent_read_config.h> |
| #include <net-snmp/library/read_config.h> |
| |
| #define HRSTORE_MONOTONICALLY_INCREASING |
| |
| /********************* |
| * |
| * Kernel & interface information, |
| * and internal forward declarations |
| * |
| *********************/ |
| |
| |
| extern netsnmp_fsys_info *HRFS_entry; |
| |
| static void parse_storage_config(const char *, char *); |
| |
| /********************* |
| * |
| * Initialisation & common implementation functions |
| * |
| *********************/ |
| int Get_Next_HR_Store(void); |
| void Init_HR_Store(void); |
| int header_hrstore(struct variable *, oid *, size_t *, int, |
| size_t *, WriteMethod **); |
| void* header_hrstoreEntry(struct variable *, oid *, size_t *, |
| int, size_t *, WriteMethod **); |
| Netsnmp_Node_Handler handle_memsize; |
| |
| |
| #define HRSTORE_MEMSIZE 1 |
| #define HRSTORE_INDEX 2 |
| #define HRSTORE_TYPE 3 |
| #define HRSTORE_DESCR 4 |
| #define HRSTORE_UNITS 5 |
| #define HRSTORE_SIZE 6 |
| #define HRSTORE_USED 7 |
| #define HRSTORE_FAILS 8 |
| |
| struct variable2 hrstore_variables[] = { |
| {HRSTORE_INDEX, ASN_INTEGER, NETSNMP_OLDAPI_RONLY, |
| var_hrstore, 1, {1}}, |
| {HRSTORE_TYPE, ASN_OBJECT_ID, NETSNMP_OLDAPI_RONLY, |
| var_hrstore, 1, {2}}, |
| {HRSTORE_DESCR, ASN_OCTET_STR, NETSNMP_OLDAPI_RONLY, |
| var_hrstore, 1, {3}}, |
| {HRSTORE_UNITS, ASN_INTEGER, NETSNMP_OLDAPI_RONLY, |
| var_hrstore, 1, {4}}, |
| {HRSTORE_SIZE, ASN_INTEGER, NETSNMP_OLDAPI_RONLY, |
| var_hrstore, 1, {5}}, |
| {HRSTORE_USED, ASN_INTEGER, NETSNMP_OLDAPI_RONLY, |
| var_hrstore, 1, {6}}, |
| {HRSTORE_FAILS, ASN_COUNTER, NETSNMP_OLDAPI_RONLY, |
| var_hrstore, 1, {7}} |
| }; |
| oid hrstore_variables_oid[] = { 1, 3, 6, 1, 2, 1, 25, 2 }; |
| oid hrMemorySize_oid[] = { 1, 3, 6, 1, 2, 1, 25, 2, 2 }; |
| oid hrStorageTable_oid[] = { 1, 3, 6, 1, 2, 1, 25, 2, 3, 1 }; |
| |
| |
| void |
| init_hrh_storage(void) |
| { |
| char *appname; |
| |
| netsnmp_register_scalar( |
| netsnmp_create_handler_registration("host/hrMemorySize", handle_memsize, |
| hrMemorySize_oid, OID_LENGTH(hrMemorySize_oid), |
| HANDLER_CAN_RONLY)); |
| REGISTER_MIB("host/hr_storage", hrstore_variables, variable2, |
| hrStorageTable_oid); |
| |
| appname = netsnmp_ds_get_string(NETSNMP_DS_LIBRARY_ID, |
| NETSNMP_DS_LIB_APPTYPE); |
| netsnmp_ds_register_config(ASN_BOOLEAN, appname, "skipNFSInHostResources", |
| NETSNMP_DS_APPLICATION_ID, |
| NETSNMP_DS_AGENT_SKIPNFSINHOSTRESOURCES); |
| |
| netsnmp_ds_register_config(ASN_BOOLEAN, appname, "realStorageUnits", |
| NETSNMP_DS_APPLICATION_ID, |
| NETSNMP_DS_AGENT_REALSTORAGEUNITS); |
| |
| snmpd_register_config_handler("storageUseNFS", parse_storage_config, NULL, |
| "1 | 2\t\t(1 = enable, 2 = disable)"); |
| } |
| |
| static int storageUseNFS = 1; /* Default to reporting NFS mounts as NetworkDisk */ |
| |
| static void |
| parse_storage_config(const char *token, char *cptr) |
| { |
| char *val; |
| int ival; |
| char *st; |
| |
| val = strtok_r(cptr, " \t", &st); |
| if (!val) { |
| config_perror("Missing FLAG parameter in storageUseNFS"); |
| return; |
| } |
| ival = atoi(val); |
| if (ival < 1 || ival > 2) { |
| config_perror("storageUseNFS must be 1 or 2"); |
| return; |
| } |
| storageUseNFS = (ival == 1) ? 1 : 0; |
| } |
| |
| /* |
| * header_hrstoreEntry(... |
| * Arguments: |
| * vp IN - pointer to variable entry that points here |
| * name IN/OUT - IN/name requested, OUT/name found |
| * length IN/OUT - length of IN/OUT oid's |
| * exact IN - TRUE if an exact match was requested |
| * var_len OUT - length of variable or 0 if function returned |
| * write_method |
| * |
| */ |
| |
| void * |
| header_hrstoreEntry(struct variable *vp, |
| oid * name, |
| size_t * length, |
| int exact, |
| size_t * var_len, WriteMethod ** write_method) |
| { |
| #define HRSTORE_ENTRY_NAME_LENGTH 11 |
| oid newname[MAX_OID_LEN]; |
| int storage_idx, LowIndex = -1; |
| int result; |
| int idx = -1; |
| netsnmp_memory_info *mem = NULL; |
| |
| DEBUGMSGTL(("host/hr_storage", "var_hrstoreEntry: request ")); |
| DEBUGMSGOID(("host/hr_storage", name, *length)); |
| DEBUGMSG(("host/hr_storage", " exact=%d\n", exact)); |
| |
| memcpy((char *) newname, (char *) vp->name, |
| (int) vp->namelen * sizeof(oid)); |
| result = snmp_oid_compare(name, *length, vp->name, vp->namelen); |
| |
| DEBUGMSGTL(("host/hr_storage", "var_hrstoreEntry: compare ")); |
| DEBUGMSGOID(("host/hr_storage", vp->name, vp->namelen)); |
| DEBUGMSG(("host/hr_storage", " => %d\n", result)); |
| |
| |
| if (result < 0 || |
| *length <= HRSTORE_ENTRY_NAME_LENGTH ) { |
| /* |
| * Requested OID too early or too short to refer |
| * to a valid row (for the current column object). |
| * GET requests should fail, GETNEXT requests |
| * should use the first row. |
| */ |
| if ( exact ) |
| return NULL; |
| netsnmp_memory_load(); |
| mem = netsnmp_memory_get_first( 0 ); |
| } |
| else { |
| /* |
| * Otherwise, retrieve the requested |
| * (or following) row as appropriate. |
| */ |
| if ( exact && *length > HRSTORE_ENTRY_NAME_LENGTH+1 ) |
| return NULL; /* Too long for a valid instance */ |
| idx = name[ HRSTORE_ENTRY_NAME_LENGTH ]; |
| if ( idx < NETSNMP_MEM_TYPE_MAX ) { |
| netsnmp_memory_load(); |
| mem = ( exact ? netsnmp_memory_get_byIdx( idx, 0 ) : |
| netsnmp_memory_get_next_byIdx( idx, 0 )); |
| } |
| } |
| |
| /* |
| * If this matched a memory-based entry, then |
| * update the OID parameter(s) for GETNEXT requests. |
| */ |
| if ( mem ) { |
| if ( !exact ) { |
| newname[ HRSTORE_ENTRY_NAME_LENGTH ] = mem->idx; |
| memcpy((char *) name, (char *) newname, |
| ((int) vp->namelen + 1) * sizeof(oid)); |
| *length = vp->namelen + 1; |
| } |
| } |
| /* |
| * If this didn't match a memory-based entry, |
| * then consider the disk-based storage. |
| */ |
| else { |
| Init_HR_Store(); |
| for (;;) { |
| storage_idx = Get_Next_HR_Store(); |
| DEBUGMSG(("host/hr_storage", "(index %d ....", storage_idx)); |
| if (storage_idx == -1) |
| break; |
| newname[HRSTORE_ENTRY_NAME_LENGTH] = storage_idx; |
| DEBUGMSGOID(("host/hr_storage", newname, *length)); |
| DEBUGMSG(("host/hr_storage", "\n")); |
| result = snmp_oid_compare(name, *length, newname, vp->namelen + 1); |
| if (exact && (result == 0)) { |
| LowIndex = storage_idx; |
| /* |
| * Save storage status information |
| */ |
| break; |
| } |
| if ((!exact && (result < 0)) && |
| (LowIndex == -1 || storage_idx < LowIndex)) { |
| LowIndex = storage_idx; |
| /* |
| * Save storage status information |
| */ |
| #ifdef HRSTORE_MONOTONICALLY_INCREASING |
| break; |
| #endif |
| } |
| } |
| if ( LowIndex != -1 ) { |
| if ( !exact ) { |
| newname[ HRSTORE_ENTRY_NAME_LENGTH ] = LowIndex; |
| memcpy((char *) name, (char *) newname, |
| ((int) vp->namelen + 1) * sizeof(oid)); |
| *length = vp->namelen + 1; |
| } |
| mem = (netsnmp_memory_info*)0xffffffff; /* To indicate 'success' */ |
| } |
| } |
| |
| *write_method = (WriteMethod*)0; |
| *var_len = sizeof(long); /* default to 'long' results */ |
| |
| /* |
| * ... and return the appropriate row |
| */ |
| DEBUGMSGTL(("host/hr_storage", "var_hrstoreEntry: process ")); |
| DEBUGMSGOID(("host/hr_storage", name, *length)); |
| DEBUGMSG(("host/hr_storage", " (%p)\n", mem)); |
| return (void*)mem; |
| } |
| |
| oid storage_type_id[] = { 1, 3, 6, 1, 2, 1, 25, 2, 1, 1 }; /* hrStorageOther */ |
| int storage_type_len = |
| sizeof(storage_type_id) / sizeof(storage_type_id[0]); |
| |
| /********************* |
| * |
| * System specific implementation functions |
| * |
| *********************/ |
| |
| int |
| handle_memsize(netsnmp_mib_handler *handler, |
| netsnmp_handler_registration *reginfo, |
| netsnmp_agent_request_info *reqinfo, |
| netsnmp_request_info *requests) |
| { |
| netsnmp_memory_info *mem_info; |
| int val; |
| |
| /* |
| * We just need to handle valid GET requests, as invalid instances |
| * are rejected automatically, and (valid) GETNEXT requests are |
| * converted into the appropriate GET request. |
| * |
| * We also only ever receive one request at a time. |
| */ |
| switch (reqinfo->mode) { |
| case MODE_GET: |
| netsnmp_memory_load(); |
| mem_info = netsnmp_memory_get_byIdx( NETSNMP_MEM_TYPE_PHYSMEM, 0 ); |
| if ( !mem_info || mem_info->size == -1 || mem_info->units == -1 ) |
| netsnmp_set_request_error( reqinfo, requests, SNMP_NOSUCHOBJECT ); |
| else { |
| val = mem_info->size; /* memtotal */ |
| val *= (mem_info->units/1024); |
| snmp_set_var_typed_value(requests->requestvb, ASN_INTEGER, |
| (u_char *)&val, sizeof(val)); |
| } |
| return SNMP_ERR_NOERROR; |
| |
| default: |
| /* |
| * we should never get here, so this is a really bad error |
| */ |
| snmp_log(LOG_ERR, "unknown mode (%d) in handle_memsize\n", |
| reqinfo->mode); |
| return SNMP_ERR_GENERR; |
| } |
| |
| return SNMP_ERR_NOERROR; |
| } |
| |
| |
| u_char * |
| var_hrstore(struct variable *vp, |
| oid * name, |
| size_t * length, |
| int exact, size_t * var_len, WriteMethod ** write_method) |
| { |
| int store_idx = 0; |
| static char string[1024]; |
| void *ptr; |
| netsnmp_memory_info *mem = NULL; |
| |
| really_try_next: |
| ptr = header_hrstoreEntry(vp, name, length, exact, var_len, |
| write_method); |
| if (ptr == NULL) |
| return NULL; |
| |
| store_idx = name[ HRSTORE_ENTRY_NAME_LENGTH ]; |
| if (HRFS_entry && |
| store_idx > NETSNMP_MEM_TYPE_MAX && |
| netsnmp_ds_get_boolean(NETSNMP_DS_APPLICATION_ID, |
| NETSNMP_DS_AGENT_SKIPNFSINHOSTRESOURCES) && |
| Check_HR_FileSys_NFS()) |
| return NULL; |
| if (store_idx <= NETSNMP_MEM_TYPE_MAX ) { |
| mem = (netsnmp_memory_info*)ptr; |
| } |
| |
| |
| |
| switch (vp->magic) { |
| case HRSTORE_INDEX: |
| long_return = store_idx; |
| return (u_char *) & long_return; |
| case HRSTORE_TYPE: |
| if (store_idx > NETSNMP_MEM_TYPE_MAX) |
| if (HRFS_entry->flags & NETSNMP_FS_FLAG_REMOTE ) |
| storage_type_id[storage_type_len - 1] = 10; /* Network Disk */ |
| else if (HRFS_entry->flags & NETSNMP_FS_FLAG_REMOVE ) |
| storage_type_id[storage_type_len - 1] = 5; /* Removable Disk */ |
| else |
| storage_type_id[storage_type_len - 1] = 4; /* Assume fixed */ |
| else |
| switch (store_idx) { |
| case NETSNMP_MEM_TYPE_PHYSMEM: |
| case NETSNMP_MEM_TYPE_USERMEM: |
| storage_type_id[storage_type_len - 1] = 2; /* RAM */ |
| break; |
| case NETSNMP_MEM_TYPE_VIRTMEM: |
| case NETSNMP_MEM_TYPE_SWAP: |
| storage_type_id[storage_type_len - 1] = 3; /* Virtual Mem */ |
| break; |
| default: |
| storage_type_id[storage_type_len - 1] = 1; /* Other */ |
| break; |
| } |
| *var_len = sizeof(storage_type_id); |
| return (u_char *) storage_type_id; |
| case HRSTORE_DESCR: |
| if (store_idx > NETSNMP_MEM_TYPE_MAX) { |
| strlcpy(string, HRFS_entry->path, sizeof(string)); |
| *var_len = strlen(string); |
| return (u_char *) string; |
| } else { |
| if ( !mem || !mem->descr ) |
| goto try_next; |
| *var_len = strlen(mem->descr); |
| return (u_char *) mem->descr; |
| } |
| case HRSTORE_UNITS: |
| if (store_idx > NETSNMP_MEM_TYPE_MAX) { |
| if (netsnmp_ds_get_boolean(NETSNMP_DS_APPLICATION_ID, |
| NETSNMP_DS_AGENT_REALSTORAGEUNITS)) |
| long_return = HRFS_entry->units & 0xffffffff; |
| else |
| long_return = HRFS_entry->units_32; |
| } else { |
| if ( !mem || mem->units == -1 ) |
| goto try_next; |
| long_return = mem->units; |
| } |
| return (u_char *) & long_return; |
| case HRSTORE_SIZE: |
| if (store_idx > NETSNMP_MEM_TYPE_MAX) { |
| if (netsnmp_ds_get_boolean(NETSNMP_DS_APPLICATION_ID, |
| NETSNMP_DS_AGENT_REALSTORAGEUNITS)) |
| long_return = HRFS_entry->size & 0xffffffff; |
| else |
| long_return = HRFS_entry->size_32; |
| } else { |
| if ( !mem || mem->size == -1 ) |
| goto try_next; |
| long_return = mem->size; |
| } |
| return (u_char *) & long_return; |
| case HRSTORE_USED: |
| if (store_idx > NETSNMP_MEM_TYPE_MAX) { |
| if (netsnmp_ds_get_boolean(NETSNMP_DS_APPLICATION_ID, |
| NETSNMP_DS_AGENT_REALSTORAGEUNITS)) |
| long_return = HRFS_entry->used & 0xffffffff; |
| else |
| long_return = HRFS_entry->used_32; |
| } else { |
| if ( !mem || mem->size == -1 || mem->free == -1 ) |
| goto try_next; |
| long_return = mem->size - mem->free; |
| } |
| return (u_char *) & long_return; |
| case HRSTORE_FAILS: |
| if (store_idx > NETSNMP_MEM_TYPE_MAX) |
| #if NETSNMP_NO_DUMMY_VALUES |
| goto try_next; |
| #else |
| long_return = 0; |
| #endif |
| else { |
| if ( !mem || mem->other == -1 ) |
| goto try_next; |
| long_return = mem->other; |
| } |
| return (u_char *) & long_return; |
| default: |
| DEBUGMSGTL(("snmpd", "unknown sub-id %d in var_hrstore\n", |
| vp->magic)); |
| } |
| return NULL; |
| |
| try_next: |
| if (!exact) |
| goto really_try_next; |
| |
| return NULL; |
| } |
| |
| |
| /********************* |
| * |
| * Internal implementation functions |
| * |
| *********************/ |
| |
| static int HRS_index; |
| |
| void |
| Init_HR_Store(void) |
| { |
| HRS_index = 0; |
| Init_HR_FileSys(); |
| } |
| |
| int |
| Get_Next_HR_Store(void) |
| { |
| /* |
| * File-based storage |
| */ |
| for (;;) { |
| HRS_index = Get_Next_HR_FileSys(); |
| if (HRS_index >= 0) { |
| if (!(netsnmp_ds_get_boolean(NETSNMP_DS_APPLICATION_ID, |
| NETSNMP_DS_AGENT_SKIPNFSINHOSTRESOURCES) && |
| Check_HR_FileSys_NFS())) { |
| return HRS_index + NETSNMP_MEM_TYPE_MAX; |
| } |
| } else { |
| return -1; |
| } |
| } |
| } |
| |
