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neighbour: no longer hold RTNL in neigh_dump_info()
neigh_dump_table() is already relying on RCU protection. pneigh_dump_table() is using its own protection (tbl->lock) Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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parent
7e4975f7e7
commit
ba0f780694
1 changed files with 5 additions and 4 deletions
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@ -2723,7 +2723,6 @@ static int neigh_dump_table(struct neigh_table *tbl, struct sk_buff *skb,
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if (filter->dev_idx || filter->master_idx)
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flags |= NLM_F_DUMP_FILTERED;
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rcu_read_lock();
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nht = rcu_dereference(tbl->nht);
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for (h = s_h; h < (1 << nht->hash_shift); h++) {
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@ -2747,7 +2746,6 @@ static int neigh_dump_table(struct neigh_table *tbl, struct sk_buff *skb,
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}
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}
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out:
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rcu_read_unlock();
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cb->args[1] = h;
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cb->args[2] = idx;
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return err;
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@ -2881,8 +2879,9 @@ static int neigh_dump_info(struct sk_buff *skb, struct netlink_callback *cb)
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s_t = cb->args[0];
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rcu_read_lock();
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for (t = 0; t < NEIGH_NR_TABLES; t++) {
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tbl = rcu_dereference_rtnl(neigh_tables[t]);
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tbl = rcu_dereference(neigh_tables[t]);
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if (!tbl)
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continue;
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@ -2898,6 +2897,7 @@ static int neigh_dump_info(struct sk_buff *skb, struct netlink_callback *cb)
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if (err < 0)
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break;
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}
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rcu_read_unlock();
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cb->args[0] = t;
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return err;
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@ -3894,7 +3894,8 @@ static int __init neigh_init(void)
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{
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rtnl_register(PF_UNSPEC, RTM_NEWNEIGH, neigh_add, NULL, 0);
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rtnl_register(PF_UNSPEC, RTM_DELNEIGH, neigh_delete, NULL, 0);
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rtnl_register(PF_UNSPEC, RTM_GETNEIGH, neigh_get, neigh_dump_info, 0);
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rtnl_register(PF_UNSPEC, RTM_GETNEIGH, neigh_get, neigh_dump_info,
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RTNL_FLAG_DUMP_UNLOCKED);
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rtnl_register(PF_UNSPEC, RTM_GETNEIGHTBL, NULL, neightbl_dump_info,
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0);
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