try harder to get directory refcounts right

15a26936 · kolya · f3e87bc8 · 15a26936
--- a/sysfile.c
+++ b/sysfile.c
@@ -199,6 +199,10 @@ sys_unlink(void)
  memset(&de, 0, sizeof(de));
  if(writei(dp, (char*)&de, off, sizeof(de)) != sizeof(de))
    panic("unlink: writei");
+  if(ip->type == T_DIR){
+    dp->nlink--;
+    iupdate(dp);
+  }
  iunlockput(dp);

  ip->nlink--;
@@ -247,8 +251,10 @@ create(char *path, int canexist, short type, short major, short minor)
  }

  if(dirlink(dp, name, ip->inum) < 0){
-    dp->nlink--;
-    iupdate(dp);
+    if(type == T_DIR){
+      dp->nlink--;
+      iupdate(dp);
+    }
    iunlockput(dp);

    ip->nlink = 0;