/
DatabaseSnapshot.cpp
1150 lines (956 loc) · 30.1 KB
/
DatabaseSnapshot.cpp
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/*
* The contents of this file are subject to the Initial
* Developer's Public License Version 1.0 (the "License");
* you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
* http://www.ibphoenix.com/main.nfs?a=ibphoenix&page=ibp_idpl.
*
* Software distributed under the License is distributed AS IS,
* WITHOUT WARRANTY OF ANY KIND, either express or implied.
* See the License for the specific language governing rights
* and limitations under the License.
*
* The Original Code was created by Dmitry Yemanov
* for the Firebird Open Source RDBMS project.
*
* Copyright (c) 2006 Dmitry Yemanov <dimitr@users.sf.net>
* and all contributors signed below.
*
* All Rights Reserved.
* Contributor(s): ______________________________________.
*/
#include "firebird.h"
#include "ids.h"
#include "../common/classes/auto.h"
#include "../common/classes/locks.h"
#include "../jrd/gdsassert.h"
#include "../jrd/jrd.h"
#include "../jrd/cch.h"
#include "../jrd/ini.h"
#include "../jrd/nbak.h"
#include "../jrd/os/guid.h"
#include "../jrd/os/pio.h"
#include "../jrd/req.h"
#include "../jrd/tra.h"
#include "../jrd/blb_proto.h"
#include "../jrd/isc_proto.h"
#include "../jrd/isc_s_proto.h"
#include "../jrd/lck_proto.h"
#include "../jrd/met_proto.h"
#include "../jrd/mov_proto.h"
#include "../jrd/os/pio_proto.h"
#include "../jrd/pag_proto.h"
#include "../jrd/thread_proto.h"
#include "../common/utils_proto.h"
#include "../jrd/Relation.h"
#include "../jrd/RecordBuffer.h"
#include "../jrd/DatabaseSnapshot.h"
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef UNIX
#include <signal.h>
#endif
#ifdef WIN_NT
#include <process.h>
#include <windows.h>
#endif
using namespace Firebird;
using namespace Jrd;
const UCHAR TAG_RECORD = MAX_UCHAR;
// SharedMemory class
const ULONG DatabaseSnapshot::SharedMemory::VERSION = 3;
const ULONG DatabaseSnapshot::SharedMemory::DEFAULT_SIZE = 1048576;
DatabaseSnapshot::SharedMemory::SharedMemory()
{
#ifdef UNIX
handle.sh_mem_semaphores = 1;
#endif
TEXT filename[MAXPATHLEN];
gds__prefix_lock(filename, MONITOR_FILE);
ISC_STATUS_ARRAY statusVector;
base = (Header*) ISC_map_file(statusVector,
filename,
init, this,
DEFAULT_SIZE,
&handle);
if (!base)
{
gds__log_status("Cannot initialize the shared memory region", statusVector);
status_exception::raise(statusVector);
}
fb_assert(base->version == VERSION);
}
DatabaseSnapshot::SharedMemory::~SharedMemory()
{
ISC_STATUS_ARRAY statusVector;
ISC_unmap_file(statusVector, &handle, 0);
}
void DatabaseSnapshot::SharedMemory::acquire()
{
#ifdef WIN_NT
checkMutex("lock", ISC_mutex_lock(&mutex));
#else
checkMutex("lock", ISC_mutex_lock(&base->mutex));
#endif
if (base->allocated > handle.sh_mem_length_mapped)
{
#if (defined HAVE_MMAP || defined WIN_NT)
ISC_STATUS_ARRAY statusVector;
base = (Header*) ISC_remap_file(statusVector, &handle, base->allocated, false);
if (!base)
{
status_exception::raise(statusVector);
}
#else
status_exception::raise(isc_random, isc_arg_string,
"Monitoring table space exhausted",
isc_arg_end);
#endif
}
}
void DatabaseSnapshot::SharedMemory::release()
{
#ifdef WIN_NT
checkMutex("unlock", ISC_mutex_unlock(&mutex));
#else
checkMutex("unlock", ISC_mutex_unlock(&base->mutex));
#endif
}
UCHAR* DatabaseSnapshot::SharedMemory::readData(Database* dbb, MemoryPool& pool, ULONG& resultSize)
{
fb_assert(dbb);
ULONG self_dbb_offset = 0;
// Garbage collect elements belonging to dead processes.
// This is done in two passes. First, we compact the data
// and calculate the total size of the resulting data.
// Second, we create a resulting buffer of the necessary size
// and copy the data there, starting with our own dbb.
// First pass
for (ULONG offset = alignOffset(sizeof(Header)); offset < base->used;)
{
UCHAR* const ptr = (UCHAR*) base + offset;
const Element* const element = (Element*) ptr;
const ULONG length = alignOffset(sizeof(Element) + element->length);
if (element->processId == getpid() &&
element->localId == dbb->dbb_monitoring_id)
{
self_dbb_offset = offset;
}
if (ISC_check_process_existence(element->processId, 0, false))
{
resultSize += element->length;
offset += length;
}
else
{
fb_assert(base->used >= offset + length);
memmove(ptr, ptr + length, base->used - offset - length);
base->used -= length;
}
}
// Second pass
UCHAR* const buffer = FB_NEW(pool) UCHAR[resultSize];
UCHAR* bufferPtr(buffer);
fb_assert(self_dbb_offset);
UCHAR* const ptr = (UCHAR*) base + self_dbb_offset;
const Element* const element = (Element*) ptr;
memcpy(bufferPtr, ptr + sizeof(Element), element->length);
bufferPtr += element->length;
for (ULONG offset = alignOffset(sizeof(Header)); offset < base->used;)
{
UCHAR* const ptr = (UCHAR*) base + offset;
const Element* const element = (Element*) ptr;
const ULONG length = alignOffset(sizeof(Element) + element->length);
if (offset != self_dbb_offset)
{
memcpy(bufferPtr, ptr + sizeof(Element), element->length);
bufferPtr += element->length;
}
offset += length;
}
fb_assert(buffer + resultSize == bufferPtr);
return buffer;
}
ULONG DatabaseSnapshot::SharedMemory::setupData(Database* dbb)
{
fb_assert(dbb);
ensureSpace(sizeof(Element));
// Put an up-to-date element at the tail
const ULONG offset = base->used;
UCHAR* const ptr = (UCHAR*) base + offset;
Element* const element = (Element*) ptr;
element->processId = getpid();
element->localId = dbb->dbb_monitoring_id;
element->length = 0;
base->used += alignOffset(sizeof(Element));
return offset;
}
void DatabaseSnapshot::SharedMemory::writeData(ULONG offset, ULONG length, const void* data)
{
ensureSpace(length);
// Put an up-to-date element at the tail
UCHAR* const ptr = (UCHAR*) base + offset;
Element* const element = (Element*) ptr;
memcpy(ptr + sizeof(Element) + element->length, data, length);
ULONG previous = alignOffset(sizeof(Element) + element->length);
element->length += length;
ULONG current = alignOffset(sizeof(Element) + element->length);
base->used += (current - previous);
}
void DatabaseSnapshot::SharedMemory::cleanup(Database* dbb)
{
fb_assert(dbb);
// Remove information about our dbb
for (ULONG offset = alignOffset(sizeof(Header)); offset < base->used;)
{
UCHAR* const ptr = (UCHAR*) base + offset;
const Element* const element = (Element*) ptr;
const ULONG length = alignOffset(sizeof(Element) + element->length);
if (element->processId == getpid() &&
element->localId == dbb->dbb_monitoring_id)
{
fb_assert(base->used >= offset + length);
memmove(ptr, ptr + length, base->used - offset - length);
base->used -= length;
}
else
{
offset += length;
}
}
}
void DatabaseSnapshot::SharedMemory::ensureSpace(ULONG length)
{
ULONG newSize = base->used + length;
if (newSize > base->allocated)
{
newSize = FB_ALIGN(newSize, DEFAULT_SIZE);
#if (defined HAVE_MMAP || defined WIN_NT)
ISC_STATUS_ARRAY statusVector;
base = (Header*) ISC_remap_file(statusVector, &handle, newSize, true);
if (!base)
{
status_exception::raise(statusVector);
}
base->allocated = handle.sh_mem_length_mapped;
#else
status_exception::raise(isc_random, isc_arg_string,
"Monitoring table space exhausted",
isc_arg_end);
#endif
}
}
void DatabaseSnapshot::SharedMemory::checkMutex(const TEXT* string, int state)
{
if (state)
{
TEXT msg[BUFFER_TINY];
sprintf(msg, "MONITOR: mutex %s error, status = %d", string, state);
gds__log(msg);
//fprintf(stderr, "%s\n", msg);
exit(FINI_ERROR);
}
}
void DatabaseSnapshot::SharedMemory::init(void* arg, SH_MEM_T* shmemData, bool initialize)
{
SharedMemory* const shmem = (SharedMemory*) arg;
fb_assert(shmem);
#ifdef WIN_NT
char buffer[MAXPATHLEN];
gds__prefix_lock(buffer, MONITOR_FILE);
checkMutex("init", ISC_mutex_init(&shmem->mutex, buffer));
#endif
if (!initialize)
return;
// Initialize the shared data header
Header* const header = (Header*) shmemData->sh_mem_address;
header->version = VERSION;
header->used = alignOffset(sizeof(Header));
header->allocated = shmemData->sh_mem_length_mapped;
#ifndef WIN_NT
checkMutex("init", ISC_mutex_init(&header->mutex, shmemData->sh_mem_mutex_arg));
#endif
}
ULONG DatabaseSnapshot::SharedMemory::alignOffset(ULONG unaligned)
{
return Firebird::MEM_ALIGN(unaligned);
}
// DatabaseSnapshot class
DatabaseSnapshot::SharedMemory* DatabaseSnapshot::dump = NULL;
InitMutex<DatabaseSnapshot> DatabaseSnapshot::startup;
DatabaseSnapshot* DatabaseSnapshot::create(thread_db* tdbb)
{
SET_TDBB(tdbb);
jrd_tra* transaction = tdbb->getTransaction();
fb_assert(transaction);
if (!transaction->tra_db_snapshot)
{
// Create a database snapshot and store it
// in the transaction block
MemoryPool& pool = *transaction->tra_pool;
transaction->tra_db_snapshot = FB_NEW(pool) DatabaseSnapshot(tdbb, pool);
}
return transaction->tra_db_snapshot;
}
void DatabaseSnapshot::cleanup(Database* dbb)
{
if (dump)
{
SharedMemory::DumpGuard guard(dump);
dump->cleanup(dbb);
}
}
int DatabaseSnapshot::blockingAst(void* ast_object)
{
Database* dbb = static_cast<Database*>(ast_object);
fb_assert(dbb);
thread_db thd_context, *tdbb;
JRD_set_thread_data(tdbb, thd_context);
Lock* const lock = dbb->dbb_monitor_lock;
fb_assert(lock);
tdbb->setDatabase(lock->lck_dbb);
tdbb->setAttachment(lock->lck_attachment);
tdbb->tdbb_quantum = QUANTUM;
tdbb->setRequest(NULL);
tdbb->setTransaction(NULL);
ISC_STATUS_ARRAY ast_status;
tdbb->tdbb_status_vector = ast_status;
Jrd::ContextPoolHolder context(tdbb, 0);
if (!(dbb->dbb_ast_flags & DBB_monitor_off))
{
// Write the data to the shared memory
try
{
dumpData(tdbb, true);
}
catch (const Exception& ex)
{
ISC_STATUS_ARRAY status;
ex.stuff_exception(status);
gds__log_status("Cannot dump the monitoring data", status);
}
// Release the lock and mark dbb as requesting a new one
LCK_release(tdbb, lock);
dbb->dbb_ast_flags |= DBB_monitor_off;
}
JRD_restore_thread_data();
return 0;
}
DatabaseSnapshot::DatabaseSnapshot(thread_db* tdbb, MemoryPool& pool)
: snapshot(pool), idMap(pool), idCounter(0)
{
SET_TDBB(tdbb);
PAG_header(true);
// Initialize record buffers
RecordBuffer* const dbb_buffer =
allocBuffer(tdbb, pool, rel_mon_database);
RecordBuffer* const att_buffer =
allocBuffer(tdbb, pool, rel_mon_attachments);
RecordBuffer* const tra_buffer =
allocBuffer(tdbb, pool, rel_mon_transactions);
RecordBuffer* const stmt_buffer =
allocBuffer(tdbb, pool, rel_mon_statements);
RecordBuffer* const call_buffer =
allocBuffer(tdbb, pool, rel_mon_calls);
RecordBuffer* const io_stat_buffer =
allocBuffer(tdbb, pool, rel_mon_io_stats);
RecordBuffer* const rec_stat_buffer =
allocBuffer(tdbb, pool, rel_mon_rec_stats);
Database* const dbb = tdbb->getDatabase();
fb_assert(dbb);
// Release our own lock
LCK_release(tdbb, dbb->dbb_monitor_lock);
dbb->dbb_ast_flags &= ~DBB_monitor_off;
{ // scope for the RAII object
// Ensure we'll be dealing with a valid backup state inside the call below
BackupManager::SharedDatabaseHolder holder(tdbb, dbb->dbb_backup_manager);
// Dump our own data
dumpData(tdbb, false);
}
// Signal other processes to dump their data
Lock temp_lock, *lock = &temp_lock;
lock->lck_dbb = dbb;
lock->lck_length = sizeof(SLONG);
lock->lck_key.lck_long = 0;
lock->lck_type = LCK_monitor;
lock->lck_owner_handle = LCK_get_owner_handle(tdbb, lock->lck_type);
lock->lck_parent = dbb->dbb_lock;
if (LCK_lock(tdbb, lock, LCK_EX, LCK_WAIT))
LCK_release(tdbb, lock);
// Mark dbb as requesting a new lock
dbb->dbb_ast_flags |= DBB_monitor_off;
// Read the shared memory
ULONG dataSize = 0;
UCHAR* dataPtr = NULL;
{ // scope
fb_assert(dump);
SharedMemory::DumpGuard guard(dump);
dataPtr = dump->readData(dbb, pool, dataSize);
}
fb_assert(dataSize && dataPtr);
AutoPtr<UCHAR, ArrayDelete<UCHAR> > data(dataPtr);
Reader reader(dataSize, data);
const Attachment* const attachment = tdbb->getAttachment();
fb_assert(attachment);
const PathName& databaseName = dbb->dbb_database_name;
const string& userName = attachment->att_user->usr_user_name;
const bool locksmith = attachment->locksmith();
// Parse the dump
RecordBuffer* buffer = NULL;
Record* record = NULL;
bool dbb_processed = false, fields_processed = false;
bool dbb_allowed = false, att_allowed = false;
int attachment_charset = ttype_none;
DumpRecord dumpRecord;
while (reader.getRecord(dumpRecord))
{
const int rid = dumpRecord.getRelationId();
switch (rid)
{
case rel_mon_database:
buffer = dbb_buffer;
break;
case rel_mon_attachments:
buffer = att_buffer;
break;
case rel_mon_transactions:
buffer = tra_buffer;
break;
case rel_mon_statements:
buffer = stmt_buffer;
break;
case rel_mon_calls:
buffer = call_buffer;
break;
case rel_mon_io_stats:
buffer = io_stat_buffer;
break;
case rel_mon_rec_stats:
buffer = rec_stat_buffer;
break;
default:
fb_assert(false);
}
record = buffer->getTempRecord();
clearRecord(record);
DumpField dumpField;
while (dumpRecord.getField(dumpField))
{
const USHORT fid = dumpField.id;
const size_t length = dumpField.length;
const char* source = (const char*) dumpField.data;
bool set_charset = false;
if (rid == rel_mon_database) // special case for MON$DATABASE
{
if (fid == f_mon_db_name)
{
dbb_allowed = !databaseName.compare(source, length);
}
if (dbb_allowed && !dbb_processed)
{
putField(tdbb, record, dumpField, attachment_charset);
fields_processed = true;
}
att_allowed = (dbb_allowed && !dbb_processed);
}
else if (rid == rel_mon_attachments) // special case for MON$ATTACHMENTS
{
if (fid == f_mon_att_user)
{
att_allowed = !userName.compare(source, length) || locksmith;
}
else if (fid == f_mon_att_charset_id)
{
set_charset = true;
}
if (dbb_allowed && att_allowed)
{
putField(tdbb, record, dumpField, attachment_charset, set_charset);
fields_processed = true;
dbb_processed = true;
}
}
else if (dbb_allowed && att_allowed) // generic logic that covers all other relations
{
putField(tdbb, record, dumpField, attachment_charset);
fields_processed = true;
dbb_processed = true;
}
}
if (fields_processed)
{
buffer->store(record);
fields_processed = false;
}
}
}
DatabaseSnapshot::~DatabaseSnapshot()
{
for (size_t i = 0; i < snapshot.getCount(); i++)
{
delete snapshot[i].data;
}
}
RecordBuffer* DatabaseSnapshot::getData(const jrd_rel* relation) const
{
fb_assert(relation);
for (size_t i = 0; i < snapshot.getCount(); i++)
{
if (snapshot[i].rel_id == relation->rel_id)
return snapshot[i].data;
}
return NULL;
}
RecordBuffer* DatabaseSnapshot::allocBuffer(thread_db* tdbb,
MemoryPool& pool,
int rel_id)
{
jrd_rel* relation = MET_lookup_relation_id(tdbb, rel_id, false);
fb_assert(relation);
MET_scan_relation(tdbb, relation);
fb_assert(relation->isVirtual());
Format* format = MET_current(tdbb, relation);
fb_assert(format);
RecordBuffer* buffer = FB_NEW(pool) RecordBuffer(pool, format);
RelationData data = {relation->rel_id, buffer};
snapshot.add(data);
return buffer;
}
void DatabaseSnapshot::clearRecord(Record* record)
{
// Initialize all fields to NULLs
memset(record->rec_data, 0, record->rec_length);
const size_t null_bytes = (record->rec_format->fmt_count + 7) >> 3;
memset(record->rec_data, 0xFF, null_bytes);
}
void DatabaseSnapshot::putField(thread_db* tdbb, Record* record, const DumpField& field,
int& charset, bool set_charset)
{
fb_assert(record);
const Format* const format = record->rec_format;
fb_assert(format && field.id < format->fmt_count);
dsc to_desc = format->fmt_desc[field.id];
to_desc.dsc_address += (IPTR) record->rec_data;
if (field.type == VALUE_GLOBAL_ID)
{
// special case: translate 64-bit global ID into 32-bit local ID
fb_assert(field.length == sizeof(SINT64));
SINT64 global_id;
memcpy(&global_id, field.data, field.length);
SLONG local_id;
if (!idMap.get(global_id, local_id))
{
local_id = ++idCounter;
idMap.put(global_id, local_id);
}
dsc from_desc;
from_desc.makeLong(0, &local_id);
MOV_move(tdbb, &from_desc, &to_desc);
}
else if (field.type == VALUE_INTEGER)
{
fb_assert(field.length == sizeof(SINT64));
SINT64 value;
memcpy(&value, field.data, field.length);
dsc from_desc;
from_desc.makeInt64(0, &value);
MOV_move(tdbb, &from_desc, &to_desc);
if (set_charset)
{
charset = (int) value;
}
}
else if (field.type == VALUE_TIMESTAMP)
{
fb_assert(field.length == sizeof(ISC_TIMESTAMP));
ISC_TIMESTAMP value;
memcpy(&value, field.data, field.length);
dsc from_desc;
from_desc.makeTimestamp(&value);
MOV_move(tdbb, &from_desc, &to_desc);
}
else if (field.type == VALUE_STRING)
{
dsc from_desc;
from_desc.makeText(field.length, charset, (UCHAR*) field.data);
MOV_move(tdbb, &from_desc, &to_desc);
}
else
{
fb_assert(false);
}
// hvlad: detach just created temporary blob from request to bound its
// lifetime to transaction. This is necessary as this blob belongs to
// the MON$ table and must be accessible until transaction ends.
if (DTYPE_IS_BLOB_OR_QUAD(to_desc.dsc_dtype))
{
bid *blob_id = reinterpret_cast<bid*>(to_desc.dsc_address);
jrd_tra *tran = tdbb->getTransaction();
const bool found = tran->tra_blobs.locate(blob_id->bid_temp_id());
fb_assert(found);
BlobIndex &blobIdx = tran->tra_blobs.current();
fb_assert(!blobIdx.bli_materialized);
if (blobIdx.bli_request)
{
const bool found = blobIdx.bli_request->req_blobs.locate(blobIdx.bli_temp_id);
fb_assert(found);
blobIdx.bli_request->req_blobs.fastRemove();
blobIdx.bli_request = NULL;
}
}
CLEAR_NULL(record, field.id);
}
void DatabaseSnapshot::dumpData(thread_db* tdbb, bool ast)
{
fb_assert(tdbb);
Database* const dbb = tdbb->getDatabase();
fb_assert(dbb);
if (ast && dbb->dbb_flags & DBB_not_in_use)
{
return;
}
startup.init();
fb_assert(dump);
SharedMemory::DumpGuard guard(dump);
dump->cleanup(dbb);
Writer writer(dbb, dump);
jrd_tra* transaction = NULL;
jrd_req* request = NULL;
jrd_req* call = NULL;
// Database information
putDatabase(dbb, writer, fb_utils::genUniqueId());
// Attachment information
for (Attachment* attachment = dbb->dbb_attachments;
attachment; attachment = attachment->att_next)
{
if (!putAttachment(attachment, writer, fb_utils::genUniqueId()))
continue;
// Transaction information
for (transaction = attachment->att_transactions;
transaction; transaction = transaction->tra_next)
{
putTransaction(transaction, writer, fb_utils::genUniqueId());
}
// Call stack information
for (transaction = attachment->att_transactions;
transaction; transaction = transaction->tra_next)
{
for (request = transaction->tra_requests; request;
request = request->req_caller)
{
request->adjustCallerStats();
if (!(request->req_flags & (req_internal | req_sys_trigger)) &&
request->req_caller)
{
putCall(request, writer, fb_utils::genUniqueId());
}
}
}
// Request information
for (request = attachment->att_requests;
request; request = request->req_request)
{
if (!(request->req_flags & (req_internal | req_sys_trigger)))
{
putRequest(request, writer, fb_utils::genUniqueId());
}
}
}
}
SINT64 DatabaseSnapshot::getGlobalId(int value)
{
return ((SINT64) getpid() << BITS_PER_LONG) + value;
}
void DatabaseSnapshot::putDatabase(const Database* database,
Writer& writer,
int stat_id)
{
fb_assert(database);
DumpRecord record(rel_mon_database);
int temp;
// database name or alias (MUST BE ALWAYS THE FIRST ITEM PASSED!)
record.storeString(f_mon_db_name, database->dbb_database_name);
// page size
record.storeInteger(f_mon_db_page_size, database->dbb_page_size);
// major ODS version
record.storeInteger(f_mon_db_ods_major, database->dbb_ods_version);
// minor ODS version
record.storeInteger(f_mon_db_ods_minor, database->dbb_minor_version);
// oldest interesting transaction
record.storeInteger(f_mon_db_oit, database->dbb_oldest_transaction);
// oldest active transaction
record.storeInteger(f_mon_db_oat, database->dbb_oldest_active);
// oldest snapshot transaction
record.storeInteger(f_mon_db_ost, database->dbb_oldest_snapshot);
// next transaction
record.storeInteger(f_mon_db_nt, database->dbb_next_transaction);
// number of page buffers
record.storeInteger(f_mon_db_page_bufs, database->dbb_bcb->bcb_count);
// SQL dialect
temp = (database->dbb_flags & DBB_DB_SQL_dialect_3) ? 3 : 1;
record.storeInteger(f_mon_db_dialect, temp);
// shutdown mode
if (database->dbb_ast_flags & DBB_shutdown_full)
temp = shut_mode_full;
else if (database->dbb_ast_flags & DBB_shutdown_single)
temp = shut_mode_single;
else if (database->dbb_ast_flags & DBB_shutdown)
temp = shut_mode_multi;
else
temp = shut_mode_online;
record.storeInteger(f_mon_db_shut_mode, temp);
// sweep interval
record.storeInteger(f_mon_db_sweep_int, database->dbb_sweep_interval);
// read only flag
temp = (database->dbb_flags & DBB_read_only) ? 1 : 0;
record.storeInteger(f_mon_db_read_only, temp);
// forced writes flag
temp = (database->dbb_flags & DBB_force_write) ? 1 : 0;
record.storeInteger(f_mon_db_forced_writes, temp);
// reserve space flag
temp = (database->dbb_flags & DBB_no_reserve) ? 0 : 1;
record.storeInteger(f_mon_db_res_space, temp);
// creation date
record.storeTimestamp(f_mon_db_created, database->dbb_creation_date);
// database size
record.storeInteger(f_mon_db_pages, PageSpace::actAlloc(database));
// database state
switch (database->dbb_backup_manager->get_state())
{
case nbak_state_normal:
temp = backup_state_normal;
break;
case nbak_state_stalled:
temp = backup_state_stalled;
break;
case nbak_state_merge:
temp = backup_state_merge;
break;
default:
temp = backup_state_unknown;
}
record.storeInteger(f_mon_db_backup_state, temp);
// statistics
record.storeGlobalId(f_mon_db_stat_id, getGlobalId(stat_id));
writer.putRecord(record);
putStatistics(&database->dbb_stats, writer, stat_id, stat_database);
}
bool DatabaseSnapshot::putAttachment(const Attachment* attachment,
Writer& writer,
int stat_id)
{
fb_assert(attachment);
if (!attachment->att_user)
{
return false;
}
DumpRecord record(rel_mon_attachments);
int temp = mon_state_idle;
for (jrd_tra* transaction_itr = attachment->att_transactions;
transaction_itr; transaction_itr = transaction_itr->tra_next)
{
if (transaction_itr->tra_requests)
{
temp = mon_state_active;
break;
}
}
// user (MUST BE ALWAYS THE FIRST ITEM PASSED!)
record.storeString(f_mon_att_user, attachment->att_user->usr_user_name);
// attachment id
record.storeInteger(f_mon_att_id, attachment->att_attachment_id);
// process id
record.storeInteger(f_mon_att_server_pid, getpid());
// state
record.storeInteger(f_mon_att_state, temp);
// attachment name
record.storeString(f_mon_att_name, attachment->att_filename);
// role
record.storeString(f_mon_att_role, attachment->att_user->usr_sql_role_name);
// remote protocol
record.storeString(f_mon_att_remote_proto, attachment->att_network_protocol);
// remote address
record.storeString(f_mon_att_remote_addr, attachment->att_remote_address);
// remote process id
if (attachment->att_remote_pid)
record.storeInteger(f_mon_att_remote_pid, attachment->att_remote_pid);
// remote process name
record.storeString(f_mon_att_remote_process, attachment->att_remote_process);
// charset
record.storeInteger(f_mon_att_charset_id, attachment->att_charset);
// timestamp
record.storeTimestamp(f_mon_att_timestamp, attachment->att_timestamp);
// garbage collection flag
temp = (attachment->att_flags & ATT_no_cleanup) ? 0 : 1;
record.storeInteger(f_mon_att_gc, temp);
// statistics
record.storeGlobalId(f_mon_att_stat_id, getGlobalId(stat_id));
writer.putRecord(record);
putStatistics(&attachment->att_stats, writer, stat_id, stat_attachment);
return true;
}
void DatabaseSnapshot::putTransaction(const jrd_tra* transaction,
Writer& writer,
int stat_id)
{
fb_assert(transaction);
DumpRecord record(rel_mon_transactions);
int temp;
// transaction id
record.storeInteger(f_mon_tra_id, transaction->tra_number);
// attachment id
record.storeInteger(f_mon_tra_att_id, transaction->tra_attachment->att_attachment_id);
// state
temp = transaction->tra_requests ? mon_state_active : mon_state_idle;
record.storeInteger(f_mon_tra_state, temp);
// timestamp
record.storeTimestamp(f_mon_tra_timestamp, transaction->tra_timestamp);
// top transaction
record.storeInteger(f_mon_tra_top, transaction->tra_top);
// oldest transaction
record.storeInteger(f_mon_tra_oit, transaction->tra_oldest);
// oldest active transaction
record.storeInteger(f_mon_tra_oat, transaction->tra_oldest_active);
// isolation mode
if (transaction->tra_flags & TRA_degree3)
temp = iso_mode_consistency;
else if (transaction->tra_flags & TRA_read_committed)
temp = (transaction->tra_flags & TRA_rec_version) ?