-- Copyright (C) 1983, 1985 by Xerox Corporation. All rights reserved.
-- PupBootServerCold.mesa, HGM, 6-Aug-85 21:06:00
DIRECTORY
Ascii USING [CR],
Process USING [Detach, SetTimeout, MsecToTicks, Pause, Yield],
Put USING [Text],
Runtime USING [IsBound],
Stream USING [Handle],
String USING [AppendChar, AppendString, Equivalent],
System USING [GreenwichMeanTime, GetGreenwichMeanTime],
Time USING [AppendCurrent],
Window USING [Handle],
Buffer USING [AccessHandle, DestroyPool, GetBuffer, MakePool, ReturnBuffer],
BootServer USING [AppendBFN, CardinalToPupBFN, PupBFNToCardinal],
BootServerDefs USING [
SendBootDir, BreatherOn, BreatherOff, PupBootServer, UpdatePicture,
BootStatsEntry, bootStatsReply, bootVersion],
BootServerFriends USING [
BootFile, BootFileNumber, CreateTempFile, DeleteTempFile, FileHandle,
GetPointerToBootTable, MakeTempFileIntoBootFile, timeNotKnown],
MiscServerDefs USING [
PupMiscServerOn, PupMiscServerOff, IgnoreThisPacket, SetBootServer],
PupDefs USING [
AppendHostName, PupAddress, PupBuffer, SendPup, PupSocket,
PupSocketDestroy, PupSocketID, PupSocketMake,
SecondsToTocks, SetPupContentsWords, GetPupContentsBytes,
UniqueLocalPupSocketID, UniqueLocalPupAddress, ReturnPup,
defaultNumberOfNetworks, GetHopsToNetwork],
PupRouterDefs USING [NetworkContext],
PupTypes USING [miscSrvSoc, PupNetID, allNets, allHosts],
PupWireFormat USING [
BcplLongNumber, BcplToMesaLongNumber, BcplSTRING, MesaToBcplLongNumber],
Slosh USING [RecvFile, RecvStatus, RetransmissionInterval],
Stats USING [StatCounterIndex, StatGetCounter];
PupBootServerCold: MONITOR LOCKS lock
IMPORTS
Process, Put, Runtime, String, System, Time, BootServer, BootServerDefs,
BootServerFriends, Buffer, MiscServerDefs, PupDefs, PupWireFormat, Slosh, Stats
EXPORTS BootServerDefs =
BEGIN OPEN BootServerDefs;
lock: PUBLIC MONITORLOCK;
running, booting, slowBooting, pleaseStop, probing, sloshing: PUBLIC BOOLEAN ←
FALSE;
longRangeMode: BOOLEAN ← FALSE;
msg: PUBLIC Window.Handle ← NIL;
slosheeHost, slosheeFileName: PUBLIC LONG STRING ← NIL;
first: LONG POINTER TO BootServerFriends.BootFile ←
BootServerFriends.GetPointerToBootTable[];
probeTicks: CARDINAL ← 1*3600/5; -- 1 hour
statLife: PUBLIC Stats.StatCounterIndex;
statBootNew: PUBLIC Stats.StatCounterIndex;
statBootDir: PUBLIC Stats.StatCounterIndex;
statFile: PUBLIC Stats.StatCounterIndex;
statSun: PUBLIC Stats.StatCounterIndex;
statFileSent: PUBLIC Stats.StatCounterIndex;
statFileSentSlow: PUBLIC Stats.StatCounterIndex;
statFileTroubles: PUBLIC Stats.StatCounterIndex;
statFileNeverStarted: PUBLIC Stats.StatCounterIndex;
statBusyDisk: PUBLIC Stats.StatCounterIndex;
statBusyBooting: PUBLIC Stats.StatCounterIndex;
statMicrocodeBooted: PUBLIC Stats.StatCounterIndex;
statSlowMicrocodeBooted: PUBLIC Stats.StatCounterIndex;
statUnknown: PUBLIC Stats.StatCounterIndex;
verbose: BOOLEAN = TRUE;
PupBootServerOn: PUBLIC PROCEDURE =
BEGIN
running ← TRUE;
pleaseStop ← FALSE;
MiscServerDefs.PupMiscServerOn[];
MiscServerDefs.SetBootServer[BootServerDefs.PupBootServer];
Process.Detach[FORK BootServerDefs.BreatherOn[]];
Process.Detach[FORK Prober[]];
FixupPicture[];
END;
PupBootServerOff: PUBLIC PROCEDURE =
BEGIN
running ← FALSE;
pleaseStop ← TRUE;
MiscServerDefs.SetBootServer[MiscServerDefs.IgnoreThisPacket];
BreatherOff[];
WHILE booting OR slowBooting OR probing OR sloshing DO
Process.Pause[Process.MsecToTicks[100]]; ENDLOOP;
MiscServerDefs.PupMiscServerOff[];
FixupPicture[];
END;
FixupPicture: PROCEDURE =
BEGIN
IF msg # NIL AND Runtime.IsBound[LOOPHOLE[UpdatePicture]] THEN UpdatePicture[];
END;
Newer: PROCEDURE [him, me: System.GreenwichMeanTime] RETURNS [BOOLEAN] =
BEGIN
IF him = BootServerFriends.timeNotKnown THEN RETURN[FALSE];
RETURN[him > me]; -- FIX THIS FOR EPOC STUFF
END;
-- This stuff should probably migrate to another file
StartProbingForBootFiles: PUBLIC ENTRY PROCEDURE =
BEGIN longRangeMode ← FALSE; ProbeForBootFiles[]; END;
StartLongRangeProbingForBootFiles: PUBLIC ENTRY PROCEDURE =
BEGIN longRangeMode ← TRUE; ProbeForBootFiles[]; END;
Prober: ENTRY PROCEDURE =
BEGIN
counter: CARDINAL ← 120/5; -- initial probe 2 min after startup
delay: CONDITION;
tryHarder: CARDINAL ← 0;
Process.SetTimeout[@delay, Process.MsecToTicks[5000]];
UNTIL pleaseStop DO
WAIT delay;
IF (counter ← counter - 1) = 0 THEN
BEGIN
tryHarder ← tryHarder + 1;
longRangeMode ← (tryHarder MOD 24) = 0;
ProbeForBootFiles[];
counter ← probeTicks;
END;
ENDLOOP;
END;
ProbeForBootFiles: INTERNAL PROCEDURE =
BEGIN
IF probing OR sloshing THEN RETURN;
probing ← TRUE;
FOR bf: BootServerFriends.BootFile ← first↑, bf.next UNTIL bf = NIL DO
bf.tries ← 0; ENDLOOP;
IF longRangeMode THEN Process.Detach[FORK LongRangeProbe[]]
ELSE Process.Detach[FORK ShortRangeProbe[]];
END;
ProbeSomeMore: ENTRY PROCEDURE =
BEGIN
IF probing OR sloshing THEN RETURN;
probing ← TRUE;
IF longRangeMode THEN Process.Detach[FORK LongRangeProbe[]]
ELSE Process.Detach[FORK ShortRangeProbe[]];
END;
ShortRangeProbe: PROCEDURE =
BEGIN OPEN PupDefs;
FixupPicture[];
ProbeOne[PupTypes.allNets];
probing ← FALSE;
FixupPicture[];
IF ~sloshing THEN BootServerDefs.SendBootDir[NIL];
END;
LongRangeProbe: PROCEDURE =
BEGIN
FixupPicture[];
FOR net: CARDINAL IN [1..PupDefs.defaultNumberOfNetworks) DO
IF PupDefs.GetHopsToNetwork[[net]] > 3 THEN LOOP;
ProbeOne[[net]];
IF sloshing THEN EXIT;
ENDLOOP;
probing ← FALSE;
FixupPicture[];
IF ~sloshing THEN BootServerDefs.SendBootDir[NIL];
END;
ProbeOne: PROCEDURE [net: PupTypes.PupNetID] =
BEGIN OPEN PupDefs;
pool: Buffer.AccessHandle ← Buffer.MakePool[send: 1, receive: 10];
soc: PupSocket ← PupSocketMake[
UniqueLocalPupSocketID[],
[net, PupTypes.allHosts, PupTypes.miscSrvSoc],
SecondsToTocks[2]];
b: PupBuffer;
THROUGH [0..5) UNTIL pleaseStop OR sloshing DO
b ← Buffer.GetBuffer[pup, pool, send];
b.pup.pupType ← bootDirReq;
SetPupContentsWords[b, 0];
soc.put[b];
UNTIL pleaseStop OR sloshing DO
b ← soc.get[];
IF b = NIL THEN EXIT;
IF b.pup.pupType # bootDirReply THEN BEGIN Buffer.ReturnBuffer[b]; LOOP; END;
LookAtBootDir[b];
ENDLOOP;
ENDLOOP;
PupSocketDestroy[soc];
Buffer.DestroyPool[pool];
END;
LookAtBootDir: PUBLIC ENTRY PROCEDURE [b: PupDefs.PupBuffer] =
BEGIN OPEN PupDefs;
bf: BootServerFriends.BootFile ← NIL;
where: PupAddress ← b.pup.source;
name: STRING = [256];
word, size, end: CARDINAL;
timeStamp: System.GreenwichMeanTime;
timeStampLocation: LONG POINTER TO PupWireFormat.BcplLongNumber;
now: System.GreenwichMeanTime ← System.GetGreenwichMeanTime[];
heNeedsOne: BOOLEAN ← FALSE;
IF pleaseStop THEN GOTO Stopping;
IF sloshing THEN GOTO AlreadySloshing;
BEGIN
context: PupRouterDefs.NetworkContext ← b.context;
IF context.pupNetNumber = b.pup.source.net
AND context.pupHostNumber = b.pup.source.host THEN GOTO FromMe;
END;
end ← GetPupContentsBytes[b]/2;
word ← 0;
UNTIL word >= end OR bf # NIL DO
timeStampLocation ← LOOPHOLE[@b.pup.pupWords[word + 1]];
timeStamp ← LOOPHOLE[PupWireFormat.BcplToMesaLongNumber[
timeStampLocation↑]];
StringCopy[LOOPHOLE[@b.pup.pupWords[word + 1 + 2]], name];
size ← ((1 + name.length) + 1)/2;
FOR bf ← first↑, bf.next UNTIL bf = NIL DO
IF ~bf.pup THEN LOOP;
IF b.pup.pupWords[word] >= 100000B THEN LOOP;
IF bf.inTransit THEN LOOP;
IF bf.code # BootServer.CardinalToPupBFN[b.pup.pupWords[word]] THEN
LOOP;
IF ~String.Equivalent[name, bf.fileName] THEN LOOP;
IF Newer[timeStamp, now] THEN LOOP; -- Don't propagate garbage
IF ~bf.unknown AND bf.create # BootServerFriends.timeNotKnown
AND Newer[bf.create, timeStamp] THEN heNeedsOne ← TRUE;
IF ~bf.unknown AND ~Newer[timeStamp, bf.create] THEN LOOP;
IF bf.tries > 1 THEN LOOP;
EXIT;
ENDLOOP;
word ← word + size + 1 + 2;
ENDLOOP;
IF sloshing THEN GOTO Sloshing;
-- This is just a hack to let him get the new version sooner. It should all work ok without this code.
IF heNeedsOne THEN
BEGIN
b.pup.dest.socket ← PupTypes.miscSrvSoc;
BootServerDefs.SendBootDir[b];
END
ELSE Buffer.ReturnBuffer[b];
-- Don't call AppendHostName (or friends) from here. The lock is still locked.
IF bf # NIL THEN
BEGIN
sloshing ← TRUE;
bf.tries ← bf.tries + 1;
Process.Detach[FORK GetNewBootFile[bf, where]];
RETURN;
END;
EXITS AlreadySloshing, FromMe, Stopping, Sloshing => Buffer.ReturnBuffer[b];
END;
StringCopy: PROCEDURE [
s: LONG POINTER TO PupWireFormat.BcplSTRING, d: LONG STRING] =
BEGIN
d.length ← s.length;
FOR i: CARDINAL IN [0..s.length) DO d[i] ← s.char[i]; ENDLOOP;
END;
GetNewBootFile: PROCEDURE [
bf: BootServerFriends.BootFile, where: PupDefs.PupAddress] =
BEGIN OPEN PupDefs;
pool: Buffer.AccessHandle;
hisName: STRING = [30];
from: PupAddress ← UniqueLocalPupAddress[@where];
fh: BootServerFriends.FileHandle;
sh: Stream.Handle;
status: Slosh.RecvStatus;
Ask: PROCEDURE =
BEGIN
b: PupBuffer ← Buffer.GetBuffer[pup, pool, send];
b.pup.source ← from;
b.pup.dest ← where;
b.pup.pupID ← [0, BootServer.PupBFNToCardinal[bf.code]];
SendPup[b, bootFileSend, 0];
END;
AppendHostName[hisName, where];
slosheeHost ← hisName;
slosheeFileName ← bf.fileName;
FixupPicture[];
IF verbose THEN StartupMessage[bf, where];
DoSomeYields[];
[fh, sh] ← BootServerFriends.CreateTempFile[];
IF fh = NIL THEN
BEGIN
Message["Rats, disk full or something (can't get temp file)."L];
sloshing ← FALSE;
slosheeHost ← slosheeFileName ← NIL;
FixupPicture[];
RETURN;
END;
pool ← Buffer.MakePool[send: 1, receive: 0];
status ← Slosh.RecvFile[msg, bf.fileName, sh, from, Ask];
Buffer.DestroyPool[pool];
IF status = statusStoreOk THEN
BEGIN
IF bf.unknown THEN bf.inTransit ← TRUE;
IF ~BootServerFriends.MakeTempFileIntoBootFile[bf, fh] THEN
Message["Oops, after all that, it didn't quite work."L];
END
ELSE
BEGIN
n: CARDINAL ← Slosh.RetransmissionInterval[];
BootServerFriends.DeleteTempFile[fh];
IF status = statusDiskFull THEN bf.tries ← bf.tries + 1;
THROUGH [0..n) UNTIL pleaseStop DO
Process.Pause[Process.MsecToTicks[1000]]; ENDLOOP;
END;
sloshing ← FALSE;
slosheeHost ← slosheeFileName ← NIL;
FixupPicture[];
IF pleaseStop OR probing THEN RETURN;
DoSomeYields[];
ProbeSomeMore[];
END;
StartupMessage: PROCEDURE [
bf: BootServerFriends.BootFile, where: PupDefs.PupAddress] =
BEGIN
text: STRING = [100];
Time.AppendCurrent[text];
String.AppendString[text, " Found "L];
IF ~bf.unknown THEN String.AppendString[text, "newer version of "L];
String.AppendString[text, bf.fileName];
String.AppendString[text, " (#"L];
BootServer.AppendBFN[text, bf.code];
String.AppendString[text, ") on "L];
PupDefs.AppendHostName[text, where];
LogString[text];
END;
BootServerStats: PUBLIC PROCEDURE [b: PupDefs.PupBuffer] =
BEGIN OPEN Stats;
WireCounter: PROCEDURE [s: StatCounterIndex]
RETURNS [PupWireFormat.BcplLongNumber] =
BEGIN RETURN[PupWireFormat.MesaToBcplLongNumber[StatGetCounter[s]]]; END;
bse: LONG POINTER TO BootStatsEntry ← LOOPHOLE[@b.pup.pupWords];
bse↑ ← [
version: bootVersion, directories: WireCounter[statBootDir],
fastSends: WireCounter[statFileSent],
slowSends: WireCounter[statFileSentSlow],
filesRecv: WireCounter[statBootNew]];
PupDefs.ReturnPup[b, bootStatsReply, 2*SIZE[BootStatsEntry]];
END;
Message: PROCEDURE [s1, s2, s3, s4: LONG STRING ← NIL] =
BEGIN
text: STRING = [200];
String.AppendString[text, "BootServer: "L];
String.AppendString[text, s1];
IF s2 # NIL THEN String.AppendString[text, s2];
IF s3 # NIL THEN String.AppendString[text, s3];
IF s4 # NIL THEN String.AppendString[text, s4];
LogString[text];
END;
LogString: PROCEDURE [text: LONG STRING] =
BEGIN
String.AppendChar[text, '.];
String.AppendChar[text, Ascii.CR];
Put.Text[NIL, text];
IF msg # NIL THEN Put.Text[msg, text];
END;
DoSomeYields: PROCEDURE =
BEGIN THROUGH [0..100) DO Process.Yield[]; ENDLOOP; END;
-- initialization
END.