shithub: gefs

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snap: fix scandead with DlChain

--- a/snap.c

+++ b/snap.c

@@ -23,8 +23,9 @@

 		return 0;

 	if(b == nil)

 		return -1;

-	p = b->data + Loghdsz;

+Nextblk:

 	for(i = Loghdsz; i < Logspc; i += 16){

+		p = b->data + i;

 		op = GBIT64(p) & 0xff;

 		switch(op){

 		case DlEnd:

@@ -38,12 +39,11 @@

 				fn(b->bp, dat);

 			if((b = getblk(bp, 0)) == nil)

 				return -1;

-			p = b->data + Loghdsz;

-			break;

+			goto Nextblk;

 		case DlGraft:

 			t.head.addr = GBIT64(p);	p += 8;

 			t.head.addr &= ~0xffULL;

-			t.head.hash = GBIT64(p);	p += 8;

+			t.head.hash = GBIT64(p);

 			t.head.gen = -1;

 			t.ins = nil;

 			scandead(&t, lblk, fn, dat);

@@ -51,7 +51,7 @@

 		case DlKill:

 			bp.addr = GBIT64(p);	p += 8;

 			bp.hash = -1;

-			bp.gen = GBIT64(p);	p += 8;

+			bp.gen = GBIT64(p);

 			bp.addr &= ~0xffULL;

 			fn(bp, dat);

 			break;