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fogfaas.pl
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fogfaas.pl
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%Copyright [2020] [Laura Bussi, Alessandro Di Giorgio, Selman Alpdundar, Tabriz Hajiev]
% Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
% Unless required by applicable law or agreed to in writing, software
% distributed under the License is distributed on an "AS IS" BASIS,
% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
% See the License for the specific language governing permissions and
% limitations under the License.
%%%%%%%%% Working (problog) code %%%%%%%%%
:- consult('utils.pl').
placeServices(AOp, [], P, P, C, C).
placeServices(AOp, [SId|Rest], Placement, [(SId, NId)|NewPlacement], Caps, NewCaps) :-
service(SId, Trig, Prog, HwReqs, PReqs, Geo),
ctx(AOp, Prog, L, [], Env, [], History),
node(NId, OpN, HwCaps, SPlats, _, CostPU, NodeLoc),
member(NodeLoc, Geo),
subset(PReqs, SPlats),
trusts2(AOp, OpN),
checkHw(HwCaps, HwReqs, NId, Caps, TmpCaps),
placeServices(AOp, Rest, Placement, NewPlacement, TmpCaps, NewCaps).
placeApp(AOp, AId, ServicePlacement, FunctionPlacement, Cost):-
app(AId, Services),
placeServices(AOp, Services, [], ServicePlacement, [], Caps),
placeAllFunctions(AOp, ServicePlacement, ServicePlacement, [], FunctionPlacement, Caps),
computeCost(FunctionPlacement, Cost).
placeAllFunctions(_, [], _, FP, FP, _).
placeAllFunctions(AOp, [(SId, Node)|Placement], GlobPlacement, FPlacement, NewFPlacement, Caps) :-
service(SId, TId, Prog, _, _, _),
placeFunctions(AOp, (SId, Node), GlobPlacement, Prog, FPlacement, TmpFPlacement, Caps, NewCaps),
placeAllFunctions(AOp, Placement, GlobPlacement, TmpFPlacement, NewFPlacement, NewCaps).
placeFunctions(_, _, _, tau, _, [], _, _).
placeFunctions(AOp, (SId, Node), ServicePlacement, par(F1, F2), Placement, NewPlacement, Caps, NewCaps) :-
placeParFunctions(AOp, (SId, Node), ServicePlacement, F1, Placement, PlacementTmp, Caps, CapsTmp),
placeParFunctions(AOp, (SId, Node), ServicePlacement, F2, PlacementTmp, NewPlacement, CapsTmp, NewCaps).
placeParFunctions(AOp, (SId, Node), ServicePlacement, FId, Placement, [(SId, FId, NId)|Placement], Caps, NewCaps) :-
func(FId, Args, HwReqs, PReqs, TUnits),
node(NId, OpN, HwCaps, SPlats, FPlats, CostPU, Geo),
trusts2(AOp, OpN),
checkPlatforms(PReqs, FPlats),
checkContext(AOp, Args, NId, OpN, Geo, L),
HwReqs =< HwCaps, checkHw(HwCaps, HwReqs, NId, Caps, NewCaps).
placeFunctions(AOp, (SId, Node), ServicePlacement, seq(P1, P2), Placement, NewPlacement, Caps, NewCaps) :-
placeFunctions(AOp, (SId, Node), ServicePlacement, P1, Placement, PlacementTmp1, Caps, NewCaps),
placeFunctions(AOp, (SId, Node), ServicePlacement, P2, Placement, PlacementTmp2, Caps, NewCaps),
append(PlacementTmp1, PlacementTmp2, NewPlacement).
placeFunctions(AOp, (SId, Node), ServicePlacement, FId, Placement, [(SId, FId, NId)|Placement], Caps, Caps) :-
func(FId, Args, HwReqs, PReqs, TUnits),
node(NId, OpN, HwCaps, SPlats, FPlats, CostPU, Geo),
trusts2(AOp, OpN),
checkPlatforms(PReqs, FPlats),
checkContext(AOp, Args, NId, OpN, Geo, L),
HwReqs =< HwCaps, checkHw(HwCaps, HwReqs, NId, Caps, NewCaps).
placeFunctions(AOp, (SId, Node), ServicePlacement, ife(FId, P1, P2), Placement, [(SId, FId, NId)|NewPlacement], Caps, NewCaps) :-
func(FId, Args, HwReqs, PReqs, TUnits),
node(NId, OpN, HwCaps, SPlats, FPlats, CostPU, Geo),
trusts2(AOp, OpN),
checkPlatforms(PReqs, FPlats),
checkContext(AOp, Args, NId, OpN, Geo, L),
HwReqs =< HwCaps,
placeFunctions(AOp, (SId, Node), ServicePlacement, P1, Placement, NewPlacement, Caps, NewCaps).
placeFunctions(AOp, (SId, Node), ServicePlacement, ife(FId, P1, P2), Placement, [(SId, FId, NId)|NewPlacement], Caps, NewCaps) :-
func(FId, Args, HwReqs, PReqs, TUnits),
node(NId, OpN, HwCaps, SPlats, FPlats, CostPU, Geo),
trusts2(AOp, OpN),
checkPlatforms(PReqs, FPlats),
checkContext(AOp, Args, NId, OpN, Geo, L),
HwReqs =< HwCaps,
placeFunctions(AOp, (SId, Node), ServicePlacement, P2, Placement, NewPlacement, Caps, NewCaps).
placeFunctions(AOp, (SId, Node), ServicePlacement, whl(FId, P), Placement, [(SId, FId, NId)|NewPlacement], Caps, NewCaps) :-
func(FId, Args, HwReqs, PReqs, TUnits),
node(NId, OpN, HwCaps, SPlats, FPlats, CostPU, Geo),
trusts2(AOp, OpN),
checkPlatforms(PReqs, FPlats),
checkContext(AOp, Args, NId, OpN, Geo, L),
HwReqs =< HwCaps,
placeFunctions(AOp, (SId, Node), ServicePlacement, P, Placement, NewPlacement, Caps, NewCaps).
placeFunctions(AOp, (SId, Node), ServicePlacement, trc(P1, P2), Placement, NewPlacement, Caps, NewCaps) :-
placeFunctions(AOp, (SId, Node), ServicePlacement, P1, Placement, PlacementTmp1, Caps, NewCaps1),
placeFunctions(AOp, (SId, Node), ServicePlacement, P2, Placement, PlacementTmp2, Caps, NewCaps2),
append(PlacementTmp1, PlacementTmp2, NewPlacement).
placeFunctions(AOp, (SId, Node), ServicePlacement, send(Args, Service, _), Placement, Placement, Caps, Caps) :-
findNode(Service, TargetNode, ServicePlacement),
labelF(AOp, Args, ReqSecurity),
findRoute(AOp, 0, Latency, Node, Node, TargetNode, ReqSecurity, [Source | Route]).
placeFunctions(AOp, (SId, Node), ServicePlacement, read(Res, CD, COI, Var), Placement, Placement, Caps, Caps).
placeFunctions(AOp, (SId, Node), ServicePlacement, write(Var, Res, CD, COI), Placement, Placement, Caps, Caps).
placeFunctions(AOp, (SId, Node), ServicePlacement, new(Res, CD, COI, LRes), Placement, Placement, Caps, Caps).
placeFunctions(AOp, (SId, Node), ServicePlacement, fireTrigger(TId), Placement, [(SId, FId, NId)|Placement], Caps, Caps) :-
trigger(Service, TId, FId),
func(FId, Args, HwReqs, PReqs, TUnits),
node(NId, OpN, HwCaps, SPlats, FPlats, CostPU, Geo),
trusts2(AOp, OpN),
checkPlatforms(PReqs, FPlats),
checkContext(AOp, Args, NId, OpN, Geo, L),
HwReqs =< HwCaps, checkHw(HwCaps, HwReqs, NId, Caps, NewCaps).
%%%%%%%%%%% DEFAULT OPTIONS %%%%%%%%%%%
leq(default, l, s).
leq(default, s, ts).
labelF(default, Args, ts).
labelF(default, Args, s) :- findall(X, ts(X, Args), []).
labelF(default, Args, l) :- findall(X, notPublic(X, Args), []).
notPublic(X, Args) :- member(X, Args),(ts(X);s(X)).
ts(X, Args) :- member(X, Args), ts(X).
guardCheck(default, l).
trusts(default, amazon).
%security context
ctx(_, tau, _ , _, _, _, _).
ctx(AOp, par(F1, F2), L, Env, NewEnv, History, History) :-
func(F1, Args1, _, _, _),
func(F2, Args2, _, _, _),
labelF(AOp, Args1, L),
labelF(AOp, Args2, L),
union(Env, Args1, TmpEnv),
union(TmpEnv, Args2, NewEnv).
ctx(AOp, seq(P1, P2), L, Env, NewEnv, History, NewHistory) :-
ctx(AOp, P1, L, Env, TmpEnv, History, TmpHistory),
ctx(AOp, P2, L, TmpEnv, NewEnv, TmpHistory, NewHistory).
ctx(AOp, ife(FId, P1, P2), L, Env, NewEnv, History, NewHistory) :-
func(FId, Args, _, _, _),
checkTime(ife(FId, P1, P2), _),
labelF(AOp, Args, L),
union(Env, Args, TmpEnv),
ctx(AOp, P1, L, TmpEnv, NewEnv, History, NewHistory).
ctx(AOp, ife(FId, P1, P2), L, Env, NewEnv, History, NewHistory) :-
func(FId, Args, _, _, _),
checkTime(ife(FId, P1, P2), _),
labelF(AOp, Args, L),
union(Env, Args, TmpEnv),
ctx(AOp, P2, L, TmpEnv, NewEnv, History, NewHistory).
ctx(AOp, whl(FId, P), L, Env, NewEnv, History, NewHistory) :-
func(FId, Args, _, _, _),
labelF(AOp, Args, L1),
guardCheck(AOp, L1),
leq2(AOp, L1, L),
union(Env, Args, TmpEnv),
ctx(AOp, P, L, TmpEnv, NewEnv, History, NewHistory).
ctx(AOp, trc(P1, P2), L, Env, NewEnv, History, NewHistory) :-
ctx(AOp, P1, L, Env, TmpEnv, History, TmpHistory),
ctx(AOp, P2, L, TmpEnv, NewEnv, TmpHistory, NewHistory).
ctx(AOp, FId, L, Env, NewEnv, History, History) :-
func(FId, Args, _, _, _),
labelF(AOp, Args, L),
union(Env, Args, NewEnv).
ctx(AOp, send(Args, Service, Timeout), L, Env, Env, History, History) :-
responseTime(Service, Time),
Time =< Timeout,
subset(Args, Env),
labelF(AOp, Args, L),
service(Service, _, Prog, _, _, _),
ctx(AOp, Prog, L2, Args, ServEnv, [], ServHistory),
leq2(AOp, L, L2).
ctx(AOp, send(Args, Service, Timeout), L, Env, Env, History, History) :-
responseTime(Service, Time),
Timeout =< Time,
subset(Args, Env),
labelF(AOp, Args, L).
ctx(AOp, read(Res, CD, COI, Var), LVar, Env, Env, History, [(Res, CD, COI)|History]) :-
labelResource(Res, CD, COI, LRes),
canRead(Res, CD, COI, History),
leq2(AOp, LRes, LVar),
call(LVar, Var),
assertz(labelResource(Res, CD, COI, LVar)).
% LVar <= LRes
ctx(AOp, write(Var, Res, CD, COI), LRes, Env, Env, History, History) :-
labelResource(Res, CD, COI, LRes),
canWrite(Res, CD, COI, History),
leq2(AOp, LVar, LRes),
call(LVar, Var),
NewSecLevel =.. [LRes, Var],
assertz(NewSecLevel).
ctx(AOp, new(Res, CD, COI, LRes), LRes, Env, Env, History, History) :-
assertz(labelResource(Res, CD, COI, LRes)).
ctx(AOp, fireTrigger(TId), L, Env, Env, History, History) :-
trigger(SId, TId, FId),
func(FId, Args, _, _, _),
labelF(AOp, Args, L),
service(SId, _, Prog, _, _, Geo),
rule(TId, Geos),
subset(Geo, Geos),
ctx(AOp, Prog, L2, [], ServEnv, [], ServHistory),
leq2(AOp, L2, L).