2520 goto out;
2521 }
2522 state->idev = in6_dev_get(state->dev);
2523 if (!state->idev)
2524 continue;
2525 read_lock_bh(&state->idev->lock);
2526 state->im = state->idev->mc_list;
2527 }
2528 if (!state->im)
2529 break;
2530 spin_lock_bh(&state->im->mca_lock);
2531 psf = state->im->mca_sources;
2532 }
2533out:
2534 return psf;
2535}
2536
2537static struct ip6_sf_list *igmp6_mcf_get_idx(struct seq_file *seq, loff_t pos)
2538{
2539 struct ip6_sf_list *psf = igmp6_mcf_get_first(seq);
2540 if (psf)
2541 while (pos && (psf = igmp6_mcf_get_next(seq, psf)) != NULL)
2542 --pos;
2543 return pos ? NULL : psf;
2544}
2545
2546static void *igmp6_mcf_seq_start(struct seq_file *seq, loff_t *pos)
2547 __acquires(dev_base_lock)
2548{
2549 read_lock(&dev_base_lock);
2550 return *pos ? igmp6_mcf_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
2551}
2552
2553static void *igmp6_mcf_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2554{
2555 struct ip6_sf_list *psf;
2556 if (v == SEQ_START_TOKEN)
2557 psf = igmp6_mcf_get_first(seq);
2558 else
2559 psf = igmp6_mcf_get_next(seq, v);
2560 ++*pos;