blub

GNUmakefile

+LAB=1
+SOL=1
+RPC=./rpc
+LAB2GE=$(shell expr $(LAB) \>\= 2)
+LAB4GE=$(shell expr $(LAB) \>\= 4)
+LAB5GE=$(shell expr $(LAB) \>\= 5)
+LAB6GE=$(shell expr $(LAB) \>\= 6)
+LAB7GE=$(shell expr $(LAB) \>\= 7)
+LAB8GE=$(shell expr $(LAB) \>\= 8)
+CXXFLAGS =  -g -MD -Wall -I. -I$(RPC) -DLAB=$(LAB) -DSOL=$(SOL) -D_FILE_OFFSET_BITS=64
+FUSEFLAGS= -D_FILE_OFFSET_BITS=64 -DFUSE_USE_VERSION=25 -I/usr/local/include/fuse -I/usr/include/fuse
+ifeq ($(shell uname -s),Darwin)
+MACFLAGS= -D__FreeBSD__=10
+else
+MACFLAGS=
+endif
+LDFLAGS = -L. -L/usr/local/lib
+ifeq ($(LAB2GE),1)
+LDLIBS = -lfuse -lpthread 
+else
+LDLIBS = -lpthread 
+endif
+LDLIBS += $(shell test -f `gcc -print-file-name=librt.so` && echo -lrt)
+LDLIBS += $(shell test -f `gcc -print-file-name=libdl.so` && echo -ldl)
+CC = g++
+CXX = g++
+
+lab:  lab1
+lab1: rpc/rpctest lock_server lock_tester lock_demo
+lab2: yfs_client extent_server
+lab3: yfs_client extent_server
+lab4: yfs_client extent_server lock_server test-lab-4-b test-lab-4-c
+lab5: yfs_client extent_server lock_server lock_tester test-lab-4-b\
+	 test-lab-4-c
+lab6: yfs_client extent_server lock_server test-lab-4-b test-lab-4-c
+lab7: lock_server
+lab8: lock_tester lock_server
+
+hfiles1=rpc/fifo.h rpc/connection.h rpc/rpc.h rpc/marshall.h rpc/method_thread.h\
+	rpc/thr_pool.h rpc/pollmgr.h rpc/jsl_log.h rpc/slock.h rpc/rpctest.cc\
+	lock_protocol.h lock_server.h lock_client.h gettime.h gettime.cc
+hfiles2=yfs_client.h extent_client.h extent_protocol.h extent_server.h
+hfiles3=lock_client_cache.h lock_server_cache.h
+hfiles4=log.h rsm.h rsm_protocol.h config.h paxos.h paxos_protocol.h rsm_state_transfer.h handle.h
+hfiles5=rsm_state_transfer.h rsm_client.h
+rsm_files = rsm.cc paxos.cc config.cc log.cc handle.cc
+
+rpclib=rpc/rpc.cc rpc/connection.cc rpc/pollmgr.cc rpc/thr_pool.cc rpc/jsl_log.cc gettime.cc
+rpc/librpc.a: $(patsubst %.cc,%.o,$(rpclib))
+	rm -f $@
+	ar cq $@ $^
+	ranlib rpc/librpc.a
+
+rpc/rpctest=rpc/rpctest.cc
+rpc/rpctest: $(patsubst %.cc,%.o,$(rpctest)) rpc/librpc.a
+
+lock_demo=lock_demo.cc lock_client.cc
+lock_demo : $(patsubst %.cc,%.o,$(lock_demo)) rpc/librpc.a
+
+lock_tester=lock_tester.cc lock_client.cc
+ifeq ($(LAB5GE),1)
+lock_tester += lock_client_cache.cc
+endif
+ifeq ($(LAB8GE),1)
+lock_tester+=rsm_client.cc
+endif
+lock_tester : $(patsubst %.cc,%.o,$(lock_tester)) rpc/librpc.a
+
+lock_server=lock_server.cc lock_smain.cc
+ifeq ($(LAB5GE),1)
+lock_server+=lock_server_cache.cc
+endif
+ifeq ($(LAB7GE),1)
+lock_server+= $(rsm_files)
+endif
+lock_server : $(patsubst %.cc,%.o,$(lock_server)) rpc/librpc.a
+
+yfs_client=yfs_client.cc extent_client.cc fuse.cc
+ifeq ($(LAB4GE),1)
+yfs_client += lock_client.cc
+endif
+ifeq ($(LAB8GE),1)
+yfs_client += rsm_client.cc
+endif
+ifeq ($(LAB5GE),1)
+yfs_client += lock_client_cache.cc
+endif
+yfs_client : $(patsubst %.cc,%.o,$(yfs_client)) rpc/librpc.a
+
+extent_server=extent_server.cc extent_smain.cc
+extent_server : $(patsubst %.cc,%.o,$(extent_server)) rpc/librpc.a
+
+test-lab-4-b=test-lab-4-b.c
+test-lab-4-b:  $(patsubst %.c,%.o,$(test_lab_4-b)) rpc/librpc.a
+
+test-lab-4-c=test-lab-4-c.c
+test-lab-4-c:  $(patsubst %.c,%.o,$(test_lab_4-c)) rpc/librpc.a
+
+%.o: %.cc
+	$(CXX) $(CXXFLAGS) -c $< -o $@
+
+fuse.o: fuse.cc
+	$(CXX) -c $(CXXFLAGS) $(FUSEFLAGS) $(MACFLAGS) $<
+
+l1:
+	./mklab.pl 1 0 l1 GNUmakefile $(rpclib) $(rpctest) $(lock_server)\
+	 $(lock_demo) $(lock_tester) $(hfiles1)
+
+l1-sol:
+	./mklab.pl 1 1 l1-sol GNUmakefile $(rpclib) $(rpctest) $(lock_server)\
+	 $(lock_demo) $(lock_tester) $(hfiles1)
+
+l2:
+	./mklab.pl 2 0 l2 GNUmakefile $(yfs_client) $(extent_server) start.sh\
+	 stop.sh test-lab-2.pl mkfs.sh $(hfiles2)
+
+l2-sol:
+	./mklab.pl 2 2 l2-sol GNUmakefile $(yfs_client) $(extent_server) $(rpclib) $(lock_server) start.sh\
+	 stop.sh test-lab-2.pl mkfs.sh $(hfiles2) $(hfiles1)
+
+l3:
+	./mklab.pl 3 0 l3 GNUmakefile  $(yfs_client) $(extent_server) start.sh\
+	 stop.sh test-lab-2.pl mkfs.sh $(hfiles2) test-lab-3.pl
+
+l3-sol:
+	./mklab.pl 3 3 l3-sol GNUmakefile  $(yfs_client) $(extent_server) $(rpclib) $(lock_server) start.sh\
+	 stop.sh test-lab-2.pl mkfs.sh $(hfiles2) $(hfiles1) test-lab-3.pl
+
+l4:
+	./mklab.pl 4 0 l4 GNUmakefile test-lab-4-a.pl $(yfs_client)\
+	 $(extent_server) start.sh stop.sh test-lab-2.pl mkfs.sh\
+	 $(hfiles2) $(test-lab-4-b) $(test-lab-4-c)
+
+l4-sol:
+	./mklab.pl 4 4 l4-sol GNUmakefile test-lab-4-a.pl $(yfs_client) $(rpclib) $(rpctest) $(lock_server)\
+	 $(extent_server) start.sh stop.sh test-lab-2.pl mkfs.sh\
+	  $(lock_demo) $(lock_tester) $(hfiles1) $(hfiles2) $(test-lab-4-b) $(test-lab-4-c)
+
+l5:
+	./mklab.pl 5 0 l5 GNUmakefile test-lab-4-a.pl $(yfs_client)\
+	 $(extent_server) $(lock_server) start.sh stop.sh test-lab-2.pl \
+	 mkfs.sh $(hfiles1) $(hfiles2) $(hfiles3) $(lock_tester) \
+	 $(test-lab-4-b) $(test-lab-4-c)
+
+l5-sol:
+	./mklab.pl 5 5 l5-sol GNUmakefile test-lab-4-a.pl $(yfs_client) $(rpclib) $(rpctest) $(lock_server)\
+	 $(extent_server) $(lock_server) start.sh stop.sh test-lab-2.pl \
+	 mkfs.sh $(hfiles1) $(hfiles2) $(hfiles3) $(lock_tester) \
+	 $(test-lab-4-b) $(test-lab-4-c)
+
+
+l6:
+	./mklab.pl 6 0 l6 GNUmakefile test-lab-4-a.pl $(yfs_client)\
+	 $(extent_server) start.sh stop.sh test-lab-2.pl mkfs.sh\
+	 $(hfiles2) $(test-lab-4-b) $(test-lab-4-c)
+
+l6-sol:
+	./mklab.pl 6 6 l6-sol GNUmakefile test-lab-4-a.pl $(yfs_client) $(rpclib) $(rpctest) $(lock_server)\
+	 $(extent_server) $(lock_server) start.sh stop.sh test-lab-2.pl mkfs.sh\
+	 $(hfiles1) $(hfiles2) $(hfiles3) $(lock_tester) $(test-lab-4-b) $(test-lab-4-c)
+
+
+l7:
+	./mklab.pl 7 0 l7 GNUmakefile rsm_tester.pl $(rsm_files) $(hfiles4) lock_smain.cc
+
+l7-sol:
+	./mklab.pl 7 7 l7-sol GNUmakefile test-lab-4-a.pl $(yfs_client) $(rpclib) $(rpctest) $(lock_server) \
+		$(extent_server) $(lock_server) start.sh stop.sh test-lab-2.pl mkfs.sh\
+		$(hfiles1) $(hfiles2) $(hfiles3) $(lock_tester) $(test-lab-4-b) $(test-lab-4-c)\
+		rsm_tester.pl $(rsm_files) $(hfiles4) 
+
+l8:
+	./mklab.pl 8 0 l8 GNUmakefile rsm_client.cc $(hfiles5) rsm.cc rsm.h
+
+l8-sol:
+	./mklab.pl 8 8 l8-sol GNUmakefile test-lab-4-a.pl $(yfs_client) $(rpclib) $(rpctest) $(lock_server) \
+		$(extent_server) $(lock_server) start.sh stop.sh test-lab-2.pl mkfs.sh\
+		$(hfiles1) $(hfiles2) $(hfiles3) $(lock_tester) $(test-lab-4-b) $(test-lab-4-c)\
+		rsm_tester.pl $(rsm_files) $(hfiles4) rsm_client.cc $(hfiles5) 
+
+-include *.d
+
+.PHONY : clean
+clean : 
+	rm -rf rpc/rpctest rpc/*.o rpc/*.d rpc/librpc.a *.o *.d yfs_client extent_server lock_server lock_tester lock_demo rpctest test-lab-4-b test-lab-4-c

gettime.cc

+/*
+ * Copyright (c), MM Weiss
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ * 
+ *     1. Redistributions of source code must retain the above copyright notice, 
+ *     this list of conditions and the following disclaimer.
+ *     
+ *     2. Redistributions in binary form must reproduce the above copyright notice, 
+ *     this list of conditions and the following disclaimer in the documentation 
+ *     and/or other materials provided with the distribution.
+ *     
+ *     3. Neither the name of the MM Weiss nor the names of its contributors 
+ *     may be used to endorse or promote products derived from this software without 
+ *     specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY 
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR 
+ * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ *  clock_gettime_stub.c
+ *  gcc -Wall -c clock_gettime_stub.c
+ *  posix realtime functions; MacOS user space glue
+ */
+ 
+/*  @comment
+ *  other possible implementation using intel builtin rdtsc
+ *  rdtsc-workaround: http://www.mcs.anl.gov/~kazutomo/rdtsc.html
+ *  
+ *  we could get the ticks by doing this
+ * 
+ *  __asm __volatile("mov %%ebx, %%esi\n\t"
+ *  		"cpuid\n\t"
+ *  		"xchg %%esi, %%ebx\n\t"
+ *  		"rdtsc"
+ *  		: "=a" (a),
+ *  		  "=d" (d)
+ * 	);
+ 
+ *  we could even replace our tricky sched_yield call by assembly code to get a better accurency,
+ *  anyway the following C stub will satisfy 99% of apps using posix clock_gettime call, 
+ *  moreover, the setter version (clock_settime) could be easly written using mach primitives:
+ *  http://www.opensource.apple.com/source/xnu/xnu-${VERSION}/osfmk/man/ (clock_[set|get]_time)
+ *  
+ *  hackers don't be crackers, don't you use a flush toilet?
+ * 
+ *
+ *  @see draft: ./posix-realtime-stub/posix-realtime-stub.c
+ *
+ */
+ 
+
+#ifdef __APPLE__
+
+#pragma weak clock_gettime
+
+#include <sys/time.h>
+#include <sys/resource.h>
+#include <mach/mach.h>
+#include <mach/clock.h>
+#include <mach/mach_time.h>
+#include <errno.h>
+#include <unistd.h>
+#include <sched.h>
+
+typedef enum {
+	CLOCK_REALTIME,
+	CLOCK_MONOTONIC,
+	CLOCK_PROCESS_CPUTIME_ID,
+	CLOCK_THREAD_CPUTIME_ID
+} clockid_t;
+
+static mach_timebase_info_data_t __clock_gettime_inf;
+
+int clock_gettime(clockid_t clk_id, struct timespec *tp) {
+	kern_return_t   ret;
+	clock_serv_t    clk;
+	clock_id_t clk_serv_id;
+	mach_timespec_t tm;
+	
+	uint64_t start, end, delta, nano;
+	
+	task_basic_info_data_t tinfo;
+	task_thread_times_info_data_t ttinfo;
+	mach_msg_type_number_t tflag;
+	
+	int retval = -1;
+	switch (clk_id) {
+		case CLOCK_REALTIME:
+		case CLOCK_MONOTONIC:
+			clk_serv_id = clk_id == CLOCK_REALTIME ? CALENDAR_CLOCK : SYSTEM_CLOCK;
+			if (KERN_SUCCESS == (ret = host_get_clock_service(mach_host_self(), clk_serv_id, &clk))) {
+				if (KERN_SUCCESS == (ret = clock_get_time(clk, &tm))) {
+					tp->tv_sec  = tm.tv_sec;
+					tp->tv_nsec = tm.tv_nsec;
+					retval = 0;
+				}
+			}
+			if (KERN_SUCCESS != ret) {
+				errno = EINVAL;
+				retval = -1;
+			}
+		break;
+		case CLOCK_PROCESS_CPUTIME_ID:
+		case CLOCK_THREAD_CPUTIME_ID:
+			start = mach_absolute_time();
+			if (clk_id == CLOCK_PROCESS_CPUTIME_ID) {
+				getpid();
+			} else {
+				sched_yield();
+			}
+			end = mach_absolute_time();
+			delta = end - start;	
+			if (0 == __clock_gettime_inf.denom) {
+				mach_timebase_info(&__clock_gettime_inf);
+			}
+			nano = delta * __clock_gettime_inf.numer / __clock_gettime_inf.denom;
+			tp->tv_sec = nano * 1e-9;  
+			tp->tv_nsec = nano - (tp->tv_sec * 1e9);
+			retval = 0;
+		break;
+		default:
+			errno = EINVAL;
+			retval = -1;
+	}
+	return retval;
+}
+
+#endif // __APPLE__

gettime.h

+#ifndef gettime_h
+#define gettime_h
+
+#ifdef __APPLE__
+typedef enum {
+	CLOCK_REALTIME,
+	CLOCK_MONOTONIC,
+	CLOCK_PROCESS_CPUTIME_ID,
+	CLOCK_THREAD_CPUTIME_ID
+} clockid_t;
+
+int clock_gettime(clockid_t clk_id, struct timespec *tp);
+#endif
+
+#endif

lock_client.cc

+// RPC stubs for clients to talk to lock_server
+
+#include "lock_client.h"
+#include "rpc.h"
+#include <arpa/inet.h>
+
+#include <sstream>
+#include <iostream>
+#include <stdio.h>
+
+lock_client::lock_client(std::string dst)
+{
+  sockaddr_in dstsock;
+  make_sockaddr(dst.c_str(), &dstsock);
+  cl = new rpcc(dstsock);
+  if (cl->bind() < 0) {
+    printf("lock_client: call bind\n");
+  }
+}
+
+int
+lock_client::stat(lock_protocol::lockid_t lid)
+{
+  int r;
+  int ret = cl->call(lock_protocol::stat, cl->id(), lid, r);
+  assert (ret == lock_protocol::OK);
+  return r;
+}
+
+lock_protocol::status
+lock_client::acquire(lock_protocol::lockid_t lid)
+{
+}
+
+lock_protocol::status
+lock_client::release(lock_protocol::lockid_t lid)
+{
+}
+

lock_client.h

+// lock client interface.
+
+#ifndef lock_client_h
+#define lock_client_h
+
+#include <string>
+#include "lock_protocol.h"
+#include "rpc.h"
+#include <vector>
+
+// Client interface to the lock server
+class lock_client {
+ protected:
+  rpcc *cl;
+ public:
+  lock_client(std::string d);
+  virtual ~lock_client() {};
+  virtual lock_protocol::status acquire(lock_protocol::lockid_t);
+  virtual lock_protocol::status release(lock_protocol::lockid_t);
+  virtual lock_protocol::status stat(lock_protocol::lockid_t);
+};
+
+
+#endif 

lock_demo.cc

+//
+// Lock demo
+//
+
+#include "lock_protocol.h"
+#include "lock_client.h"
+#include "rpc.h"
+#include <arpa/inet.h>
+#include <vector>
+#include <stdlib.h>
+#include <stdio.h>
+
+std::string dst;
+lock_client *lc;
+
+int
+main(int argc, char *argv[])
+{
+  int r;
+
+  if(argc != 2){
+    fprintf(stderr, "Usage: %s [host:]port\n", argv[0]);
+    exit(1);
+  }
+
+  dst = argv[1];
+  lc = new lock_client(dst);
+  r = lc->stat(1);
+  printf ("stat returned %d\n", r);
+}

lock_protocol.h

+// lock protocol
+
+#ifndef lock_protocol_h
+#define lock_protocol_h
+
+#include "rpc.h"
+
+class lock_protocol {
+ public:
+  enum xxstatus { OK, RETRY, RPCERR, NOENT, IOERR };
+  typedef int status;
+  typedef unsigned long long lockid_t;
+  enum rpc_numbers {
+    acquire = 0x7001,
+    release,
+    subscribe,	// for lab 5
+    stat
+  };
+};
+
+#endif 

lock_server.cc

+// the lock server implementation
+
+#include "lock_server.h"
+#include <sstream>
+#include <stdio.h>
+#include <unistd.h>
+#include <arpa/inet.h>
+
+lock_server::lock_server():
+  nacquire (0)
+{
+}
+
+lock_protocol::status
+lock_server::stat(int clt, lock_protocol::lockid_t lid, int &r)
+{
+  lock_protocol::status ret = lock_protocol::OK;
+  printf("stat request from clt %d\n", clt);
+  r = nacquire;
+  return ret;
+}
+
+

lock_server.h

+// this is the lock server
+// the lock client has a similar interface
+
+#ifndef lock_server_h
+#define lock_server_h
+
+#include <string>
+#include "lock_protocol.h"
+#include "lock_client.h"
+#include "rpc.h"
+
+class lock_server {
+
+ protected:
+  int nacquire;
+
+ public:
+  lock_server();
+  ~lock_server() {};
+  lock_protocol::status stat(int clt, lock_protocol::lockid_t lid, int &);
+};
+
+#endif 
+
+
+
+
+
+
+

lock_smain.cc

+#include "rpc.h"
+#include <arpa/inet.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include "lock_server.h"
+
+#include "jsl_log.h"
+
+// Main loop of lock_server
+
+int
+main(int argc, char *argv[])
+{
+  setvbuf(stdout, NULL, _IONBF, 0);
+  setvbuf(stderr, NULL, _IONBF, 0);
+
+  srandom(getpid());
+
+  if(argc != 2){
+    fprintf(stderr, "Usage: %s port\n", argv[0]);
+    exit(1);
+  }
+
+  //jsl_set_debug(2);
+
+#ifndef RSM
+  lock_server ls;
+  rpcs server(atoi(argv[1]));
+  server.reg(lock_protocol::stat, &ls, &lock_server::stat);
+#endif
+
+
+  while(1)
+    sleep(1000);
+}

lock_tester.cc

+//
+// Lock server tester
+//
+
+#include "lock_protocol.h"
+#include "lock_client.h"
+#include "rpc.h"
+#include "jsl_log.h"
+#include <arpa/inet.h>
+#include <vector>
+#include <stdlib.h>
+#include <stdio.h>
+
+// must be >= 2
+int nt = 10; //XXX: lab1's rpc handlers are blocking. Since rpcs uses a thread pool of 10 threads, we cannot test more than 10 blocking rpc.
+std::string dst;
+lock_client **lc = new lock_client * [nt];
+lock_protocol::lockid_t a = 1;
+lock_protocol::lockid_t b = 2;
+lock_protocol::lockid_t c = 3;
+
+// check_grant() and check_release() check that the lock server
+// doesn't grant the same lock to both clients.
+// it assumes that lock names are distinct in the first byte.
+int ct[256];
+pthread_mutex_t count_mutex;
+
+void
+check_grant(lock_protocol::lockid_t lid)
+{
+  pthread_mutex_lock(&count_mutex);
+  int x = lid & 0xff;
+  if(ct[x] != 0){
+    fprintf(stderr, "error: server granted %016llx twice\n", lid);
+    fprintf(stdout, "error: server granted %016llx twice\n", lid);
+    exit(1);
+  }
+  ct[x] += 1;
+  pthread_mutex_unlock(&count_mutex);
+}
+
+void
+check_release(lock_protocol::lockid_t lid)
+{
+  pthread_mutex_lock(&count_mutex);
+  int x = lid & 0xff;
+  if(ct[x] != 1){
+    fprintf(stderr, "error: client released un-held lock %016llx\n",  lid);
+    exit(1);
+  }
+  ct[x] -= 1;
+  pthread_mutex_unlock(&count_mutex);
+}
+
+void
+test1(void)
+{
+    printf ("acquire a release a acquire a release a\n");
+    lc[0]->acquire(a);
+    check_grant(a);
+    lc[0]->release(a);
+    check_release(a);
+    lc[0]->acquire(a);
+    check_grant(a);
+    lc[0]->release(a);
+    check_release(a);
+
+    printf ("acquire a acquire b release b release a\n");
+    lc[0]->acquire(a);
+    check_grant(a);
+    lc[0]->acquire(b);
+    check_grant(b);
+    lc[0]->release(b);
+    check_release(b);
+    lc[0]->release(a);
+    check_release(a);
+}
+
+void *
+test2(void *x) 
+{
+  int i = * (int *) x;
+
+  printf ("test2: client %d acquire a release a\n", i);