shithub: gefs

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snap: clear all necessary deadlists, put blocks in memgen deadlist.

--- a/blk.c

+++ b/blk.c

@@ -831,7 +831,7 @@

 {

 	Bfree *f;

-	if(t == &fs->snap || (t != nil && bp.gen <= t->gen)){

+	if(t == &fs->snap || (t != nil && bp.gen < t->memgen)){

 		tracex("killb", bp, getcallerpc(&t), -1);

 		killblk(t, bp);

 		return;

--- a/snap.c

+++ b/snap.c

@@ -258,6 +258,20 @@

 		else

 			freedl(&dl, 1);

 	}

+	if(succ != -1){

+		pfx[0] = Kdlist;

+		PACK64(pfx+1, succ);

+		btnewscan(&s, pfx, sizeof(pfx));

+		btenter(&fs->snap, &s);

+		while(1){

+			if(!btnext(&s, &s.kv))

+				break;

+			kv2dlist(&s.kv, &dl);

+	

+			if(dl.bgen > prev)

+				freedl(&dl, 1);

+		}

+	}

 	btexit(&s);

 }

@@ -558,7 +572,7 @@

 	if(t == &fs->snap)

 		dl = &fs->snapdl;

 	else if(bp.gen > t->base)

-		dl = getdl(t->gen, bp.gen);

+		dl = getdl(t->memgen, bp.gen);

 	else

 		return;

 	if(waserror()){