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| author | stephen hemminger <shemminger@vyatta.com> | 2009-11-10 07:54:55 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-11-10 22:27:12 -0800 |
| commit | 61fbab77a843d2e772322ac130715cc9a98bf718 (patch) | |
| tree | ceb0046726e50bb72366d57aa2316f85dacf6744 /net | |
| parent | fa918602b61a71b4a9f47861b7e65c70258516c1 (diff) | |
| download | kernel_samsung_smdk4412-61fbab77a843d2e772322ac130715cc9a98bf718.tar.gz kernel_samsung_smdk4412-61fbab77a843d2e772322ac130715cc9a98bf718.tar.bz2 kernel_samsung_smdk4412-61fbab77a843d2e772322ac130715cc9a98bf718.zip | |
IPV4: use rcu to walk list of devices in IGMP
This also needs to be optimized for large number of devices.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/igmp.c | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c index d41e5de79a8..bd24f6560a4 100644 --- a/net/ipv4/igmp.c +++ b/net/ipv4/igmp.c @@ -2311,7 +2311,7 @@ static inline struct ip_mc_list *igmp_mc_get_first(struct seq_file *seq) struct igmp_mc_iter_state *state = igmp_mc_seq_private(seq); state->in_dev = NULL; - for_each_netdev(net, state->dev) { + for_each_netdev_rcu(net, state->dev) { struct in_device *in_dev; in_dev = in_dev_get(state->dev); if (!in_dev) @@ -2361,9 +2361,9 @@ static struct ip_mc_list *igmp_mc_get_idx(struct seq_file *seq, loff_t pos) } static void *igmp_mc_seq_start(struct seq_file *seq, loff_t *pos) - __acquires(dev_base_lock) + __acquires(rcu) { - read_lock(&dev_base_lock); + rcu_read_lock(); return *pos ? igmp_mc_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; } @@ -2379,7 +2379,7 @@ static void *igmp_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos) } static void igmp_mc_seq_stop(struct seq_file *seq, void *v) - __releases(dev_base_lock) + __releases(rcu) { struct igmp_mc_iter_state *state = igmp_mc_seq_private(seq); if (likely(state->in_dev != NULL)) { @@ -2388,7 +2388,7 @@ static void igmp_mc_seq_stop(struct seq_file *seq, void *v) state->in_dev = NULL; } state->dev = NULL; - read_unlock(&dev_base_lock); + rcu_read_unlock(); } static int igmp_mc_seq_show(struct seq_file *seq, void *v) @@ -2462,7 +2462,7 @@ static inline struct ip_sf_list *igmp_mcf_get_first(struct seq_file *seq) state->idev = NULL; state->im = NULL; - for_each_netdev(net, state->dev) { + for_each_netdev_rcu(net, state->dev) { struct in_device *idev; idev = in_dev_get(state->dev); if (unlikely(idev == NULL)) @@ -2528,8 +2528,9 @@ static struct ip_sf_list *igmp_mcf_get_idx(struct seq_file *seq, loff_t pos) } static void *igmp_mcf_seq_start(struct seq_file *seq, loff_t *pos) + __acquires(rcu) { - read_lock(&dev_base_lock); + rcu_read_lock(); return *pos ? igmp_mcf_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; } @@ -2545,6 +2546,7 @@ static void *igmp_mcf_seq_next(struct seq_file *seq, void *v, loff_t *pos) } static void igmp_mcf_seq_stop(struct seq_file *seq, void *v) + __releases(rcu) { struct igmp_mcf_iter_state *state = igmp_mcf_seq_private(seq); if (likely(state->im != NULL)) { @@ -2557,7 +2559,7 @@ static void igmp_mcf_seq_stop(struct seq_file *seq, void *v) state->idev = NULL; } state->dev = NULL; - read_unlock(&dev_base_lock); + rcu_read_unlock(); } static int igmp_mcf_seq_show(struct seq_file *seq, void *v) |