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add unionfs-race: earlier attempt to fix races (obsolete and wrong)

--- /dev/null

+++ b/unionfs-race

@@ -1,0 +1,27 @@

+diff c29f9884bb2aba8ac6a2b9286d582ba86dd61ae1 uncommitted

+--- a/unionfs.c

++++ b/unionfs.c

+@@ -268,6 +268,7 @@

+ 	long n;

+ 	Fcall *T, *R;

+ 	FILE *f;

++	Dirlist *dl;

+ 	

+ 	T = &r->ifcall;

+ 	R = &r->ofcall;

+@@ -280,10 +281,13 @@

+ 		if(T->offset == 0){

+ 			if(seek(f->fd, 0, 0) == -1)

+ 				goto error;

++			if((dl = dirlist(f->fd)) == nil)

++				goto error;

++			srvacquire(&thefs);

+ 			if(f->dl != nil)

+ 				dirlistfree(f->dl);

+-			if((f->dl = dirlist(f->fd)) == nil)

+-				goto error;

++			f->dl = dl;

++			srvrelease(&thefs);

+ 		}

+ 		dirread9p(r, dirgen, f->dl);

+ 	}else{

-- 

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