static int inet6_dump_fib(struct sk_buff *skb, struct netlink_callback *cb) { struct net *net = sock_net(skb->sk); unsigned int h, s_h; unsigned int e = 0, s_e; struct rt6_rtnl_dump_arg arg; struct fib6_walker_t *w; struct fib6_table *tb; struct hlist_node *node; struct hlist_head *head; int res = 0; s_h = cb->args[0]; s_e = cb->args[1]; w = (void *)cb->args[2]; if (!w) { cb->args[3] = (long)cb->done; cb->done = fib6_dump_done; w = kzalloc(sizeof(*w), GFP_ATOMIC); if (!w) return -ENOMEM; w->func = fib6_dump_node; cb->args[2] = (long)w; } arg.skb = skb; arg.cb = cb; arg.net = net; w->args = &arg; rcu_read_lock(); for (h = s_h; h < FIB6_TABLE_HASHSZ; h++, s_e = 0) { e = 0; head = &net->ipv6.fib_table_hash[h]; hlist_for_each_entry_rcu(tb, node, head, tb6_hlist) { if (e < s_e) goto next; res = fib6_dump_table(tb, skb, cb); if (res != 0) goto out; next: e++; } } out: rcu_read_unlock(); cb->args[1] = e; cb->args[0] = h; res = res < 0 ? res : skb->len; if (res <= 0) fib6_dump_end(cb); return res; }
static int fib6_dump_done(struct netlink_callback *cb) { fib6_dump_end(cb); return cb->done ? cb->done(cb) : 0; }