afs_int32
writeDatabase(struct ubik_trans *ut, int fid)
{
dbadr dbAddr, dbAppAddr;
struct dump diskDump, apDiskDump;
dbadr tapeAddr;
struct tape diskTape;
dbadr volFragAddr;
struct volFragment diskVolFragment;
struct volInfo diskVolInfo;
int length, hash;
int old = 0;
int entrySize;
afs_int32 code = 0, tcode;
afs_int32 appDumpAddrs[MAXAPPENDS], numaddrs, appcount, j;
struct memoryHashTable *mht;
LogDebug(4, "writeDatabase:\n");
/* write out a header identifying this database etc */
tcode = writeDbHeader(fid);
if (tcode) {
LogError(tcode, "writeDatabase: Can't write Header\n");
ERROR(tcode);
}
/* write out the tree of dump structures */
mht = ht_GetType(HT_dumpIden_FUNCTION, &entrySize);
if (!mht) {
LogError(tcode, "writeDatabase: Can't get dump type\n");
ERROR(BUDB_BADARGUMENT);
}
for (old = 0; old <= 1; old++) {
/*oldnew */
/* only two states, old or not old */
length = (old ? mht->oldLength : mht->length);
if (!length)
continue;
for (hash = 0; hash < length; hash++) {
/*hashBuckets */
/* dump all the dumps in this hash bucket
*/
for (dbAddr = ht_LookupBucket(ut, mht, hash, old); dbAddr; dbAddr = ntohl(diskDump.idHashChain)) { /*initialDumps */
/* now check if this dump had any errors/inconsistencies.
* If so, don't dump it
*/
if (badEntry(dbAddr)) {
LogError(0,
"writeDatabase: Damaged dump entry at addr 0x%x\n",
dbAddr);
Log(" Skipping remainder of dumps on hash chain %d\n",
hash);
break;
}
tcode =
cdbread(ut, dump_BLOCK, dbAddr, &diskDump,
sizeof(diskDump));
if (tcode) {
LogError(tcode,
"writeDatabase: Can't read dump entry (addr 0x%x)\n",
dbAddr);
Log(" Skipping remainder of dumps on hash chain %d\n",
hash);
break;
}
/* Skip appended dumps, only start with initial dumps */
if (diskDump.initialDumpID != 0)
continue;
/* Skip appended dumps, only start with initial dumps. Then
* follow the appended dump chain so they are in order for restore.
*/
appcount = numaddrs = 0;
for (dbAppAddr = dbAddr; dbAppAddr;
dbAppAddr = ntohl(apDiskDump.appendedDumpChain)) {
/*appendedDumps */
/* Check to see if we have a circular loop of appended dumps */
for (j = 0; j < numaddrs; j++) {
if (appDumpAddrs[j] == dbAppAddr)
break; /* circular loop */
}
if (j < numaddrs) { /* circular loop */
Log("writeDatabase: Circular loop found in appended dumps\n");
Log("Skipping rest of appended dumps of dumpID %u\n",
ntohl(diskDump.id));
break;
}
if (numaddrs >= MAXAPPENDS)
numaddrs = MAXAPPENDS - 1; /* don't overflow */
appDumpAddrs[numaddrs] = dbAppAddr;
numaddrs++;
/* If we dump a 1000 appended dumps, assume a loop */
if (appcount >= 5 * MAXAPPENDS) {
Log("writeDatabase: Potential circular loop of appended dumps\n");
Log("Skipping rest of appended dumps of dumpID %u. Dumped %d\n", ntohl(diskDump.id), appcount);
break;
}
appcount++;
/* Read the dump entry */
if (dbAddr == dbAppAddr) {
/* First time through, don't need to read the dump entry again */
memcpy(&apDiskDump, &diskDump, sizeof(diskDump));
} else {
if (badEntry(dbAppAddr)) {
LogError(0,
"writeDatabase: Damaged appended dump entry at addr 0x%x\n",
dbAddr);
Log(" Skipping this and remainder of appended dumps of initial DumpID %u\n", ntohl(diskDump.id));
break;
}
tcode =
cdbread(ut, dump_BLOCK, dbAppAddr, &apDiskDump,
sizeof(apDiskDump));
if (tcode) {
LogError(tcode,
"writeDatabase: Can't read appended dump entry (addr 0x%x)\n",
dbAppAddr);
Log(" Skipping this and remainder of appended dumps of initial DumpID %u\n", ntohl(diskDump.id));
break;
}
/* Verify that this appended dump points to the initial dump */
if (ntohl(apDiskDump.initialDumpID) !=
ntohl(diskDump.id)) {
LogError(0,
"writeDatabase: Appended dumpID %u does not reference initial dumpID %u\n",
ntohl(apDiskDump.id),
ntohl(diskDump.id));
Log(" Skipping this appended dump\n");
continue;
}
}
/* Save the dump entry */
tcode = writeDump(fid, &apDiskDump);
if (tcode) {
LogError(tcode,
"writeDatabase: Can't write dump entry\n");
ERROR(tcode);
}
/* For each tape on this dump
*/
for (tapeAddr = ntohl(apDiskDump.firstTape); tapeAddr; tapeAddr = ntohl(diskTape.nextTape)) { /*tapes */
/* read the tape entry */
tcode =
cdbread(ut, tape_BLOCK, tapeAddr, &diskTape,
sizeof(diskTape));
if (tcode) {
LogError(tcode,
"writeDatabase: Can't read tape entry (addr 0x%x) of dumpID %u\n",
tapeAddr, ntohl(apDiskDump.id));
Log(" Skipping this and remaining tapes in the dump (and all their volumes)\n");
break;
}
/* Save the tape entry */
tcode =
writeTape(fid, &diskTape, ntohl(apDiskDump.id));
if (tcode) {
LogError(tcode,
"writeDatabase: Can't write tape entry\n");
ERROR(tcode);
}
/* For each volume on this tape.
*/
for (volFragAddr = ntohl(diskTape.firstVol); volFragAddr; volFragAddr = ntohl(diskVolFragment.sameTapeChain)) { /*volumes */
/* Read the volume Fragment entry */
tcode =
cdbread(ut, volFragment_BLOCK, volFragAddr,
&diskVolFragment,
sizeof(diskVolFragment));
if (tcode) {
LogError(tcode,
"writeDatabase: Can't read volfrag entry (addr 0x%x) of dumpID %u\n",
volFragAddr, ntohl(apDiskDump.id));
Log(" Skipping this and remaining volumes on tape '%s'\n", diskTape.name);
break;
}
/* Read the volume Info entry */
tcode =
cdbread(ut, volInfo_BLOCK,
ntohl(diskVolFragment.vol),
&diskVolInfo, sizeof(diskVolInfo));
if (tcode) {
LogError(tcode,
"writeDatabase: Can't read volinfo entry (addr 0x%x) of dumpID %u\n",
ntohl(diskVolFragment.vol),
ntohl(apDiskDump.id));
Log(" Skipping volume on tape '%s'\n",
diskTape.name);
continue;
}
/* Save the volume entry */
tcode =
writeVolume(ut, fid, &diskVolFragment,
&diskVolInfo,
ntohl(apDiskDump.id),
diskTape.name);
if (tcode) {
LogError(tcode,
"writeDatabase: Can't write volume entry\n");
ERROR(tcode);
}
} /*volumes */
} /*tapes */
} /*appendedDumps */
} /*initialDumps */
} /*hashBuckets */
} /*oldnew */
/* write out the textual configuration information */
tcode = writeText(ut, fid, TB_DUMPSCHEDULE);
if (tcode) {
LogError(tcode, "writeDatabase: Can't write dump schedule\n");
ERROR(tcode);
}
tcode = writeText(ut, fid, TB_VOLUMESET);
if (tcode) {
LogError(tcode, "writeDatabase: Can't write volume set\n");
ERROR(tcode);
}
tcode = writeText(ut, fid, TB_TAPEHOSTS);
if (tcode) {
LogError(tcode, "writeDatabase: Can't write tape hosts\n");
ERROR(tcode);
}
tcode = writeStructHeader(fid, SD_END);
if (tcode) {
LogError(tcode, "writeDatabase: Can't write end savedb\n");
ERROR(tcode);
}
error_exit:
doneWriting(code);
return (code);
}
void CryptoManager::cryptThread()
{
ISC_STATUS_ARRAY status_vector;
try
{
// Try to take crypt mutex
// If can't take that mutex - nothing to do, cryptThread already runs in our process
MutexEnsureUnlock guard(cryptThreadMtx, FB_FUNCTION);
if (!guard.tryEnter())
{
return;
}
// establish context
UserId user;
user.usr_user_name = "(Crypt thread)";
Jrd::Attachment* const attachment = Jrd::Attachment::create(&dbb);
RefPtr<SysAttachment> jAtt(new SysAttachment(attachment));
attachment->att_interface = jAtt;
attachment->att_filename = dbb.dbb_filename;
attachment->att_user = &user;
BackgroundContextHolder tdbb(&dbb, attachment, status_vector, FB_FUNCTION);
tdbb->tdbb_quantum = SWEEP_QUANTUM;
ULONG lastPage = getLastPage(tdbb);
ULONG runpage = 1;
Stack<ULONG> pages;
// Take exclusive threadLock
// If can't take that lock - nothing to do, cryptThread already runs somewhere
if (!LCK_lock(tdbb, threadLock, LCK_EX, LCK_NO_WAIT))
{
return;
}
bool lckRelease = false;
try
{
do
{
// Check is there some job to do
while ((runpage = currentPage.exchangeAdd(+1)) < lastPage)
{
// forced terminate
if (down)
{
break;
}
// nbackup state check
if (dbb.dbb_backup_manager && dbb.dbb_backup_manager->getState() != nbak_state_normal)
{
if (currentPage.exchangeAdd(-1) >= lastPage)
{
// currentPage was set to last page by thread, closing database
break;
}
THD_sleep(100);
continue;
}
// scheduling
if (--tdbb->tdbb_quantum < 0)
{
JRD_reschedule(tdbb, SWEEP_QUANTUM, true);
}
// writing page to disk will change it's crypt status in usual way
WIN window(DB_PAGE_SPACE, runpage);
Ods::pag* page = CCH_FETCH(tdbb, &window, LCK_write, pag_undefined);
if (page && page->pag_type <= pag_max &&
(bool(page->pag_flags & Ods::crypted_page) != crypt) &&
Ods::pag_crypt_page[page->pag_type])
{
CCH_MARK(tdbb, &window);
pages.push(runpage);
}
CCH_RELEASE_TAIL(tdbb, &window);
// sometimes save currentPage into DB header
++runpage;
if ((runpage & 0x3FF) == 0)
{
writeDbHeader(tdbb, runpage, pages);
}
}
// At this moment of time all pages with number < lastpage
// are guaranteed to change crypt state. Check for added pages.
lastPage = getLastPage(tdbb);
// forced terminate
if (down)
{
break;
}
} while (runpage < lastPage);
// Finalize crypt
if (!down)
{
writeDbHeader(tdbb, 0, pages);
}
// Release exclusive lock on StartCryptThread
lckRelease = true;
LCK_release(tdbb, threadLock);
}
catch (const Exception&)
{
try
{
if (!lckRelease)
{
// try to save current state of crypt thread
if (!down)
{
writeDbHeader(tdbb, runpage, pages);
}
// Release exclusive lock on StartCryptThread
LCK_release(tdbb, threadLock);
}
}
catch (const Exception&)
{ }
throw;
}
}
catch (const Exception& ex)
{
// Error during context creation - we can't even release lock
iscLogException("Crypt thread:", ex);
}
}
