2373 read_unlock_bh(&state->idev->lock);
2374 in6_dev_put(state->idev);
2375 }
2376 state->dev = next_net_device(state->dev);
2377 if (!state->dev) {
2378 state->idev = NULL;
2379 break;
2380 }
2381 state->idev = in6_dev_get(state->dev);
2382 if (!state->idev)
2383 continue;
2384 read_lock_bh(&state->idev->lock);
2385 im = state->idev->mc_list;
2386 }
2387 return im;
2388}
2389
2390static struct ifmcaddr6 *igmp6_mc_get_idx(struct seq_file *seq, loff_t pos)
2391{
2392 struct ifmcaddr6 *im = igmp6_mc_get_first(seq);
2393 if (im)
2394 while (pos && (im = igmp6_mc_get_next(seq, im)) != NULL)
2395 --pos;
2396 return pos ? NULL : im;
2397}
2398
2399static void *igmp6_mc_seq_start(struct seq_file *seq, loff_t *pos)
2400 __acquires(dev_base_lock)
2401{
2402 read_lock(&dev_base_lock);
2403 return igmp6_mc_get_idx(seq, *pos);
2404}
2405
2406static void *igmp6_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2407{
2408 struct ifmcaddr6 *im;
2409 im = igmp6_mc_get_next(seq, v);
2410 ++*pos;
2411 return im;
2412}
2413