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| author | Florian Westphal <fw@strlen.de> | 2018-06-02 23:41:06 +0200 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2018-06-03 01:18:37 +0200 |
| commit | 1b2470e59fb1e983a3655feba30cdfc03e609d51 (patch) | |
| tree | 5298d1333c969020c364831d20035ce9cc79070d /include/net | |
| parent | 290180e2448c02d6b391455937098882a73a9494 (diff) | |
| download | op-kernel-dev-1b2470e59fb1e983a3655feba30cdfc03e609d51.zip op-kernel-dev-1b2470e59fb1e983a3655feba30cdfc03e609d51.tar.gz | |
netfilter: nf_tables: handle chain name lookups via rhltable
If there is a significant amount of chains list search is too slow, so
add an rhlist table for this.
This speeds up ruleset loading: for every new rule we have to check if
the name already exists in current generation.
We need to be able to cope with duplicate chain names in case a transaction
drops the nfnl mutex (for request_module) and the abort of this old
transaction is still pending.
The list is kept -- we need a way to iterate chains even if hash resize is
in progress without missing an entry.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/netfilter/nf_tables.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/include/net/netfilter/nf_tables.h b/include/net/netfilter/nf_tables.h index 83e7b83..08c005c 100644 --- a/include/net/netfilter/nf_tables.h +++ b/include/net/netfilter/nf_tables.h @@ -9,6 +9,7 @@ #include <linux/netfilter/x_tables.h> #include <linux/netfilter/nf_tables.h> #include <linux/u64_stats_sync.h> +#include <linux/rhashtable.h> #include <net/netfilter/nf_flow_table.h> #include <net/netlink.h> @@ -860,6 +861,7 @@ enum nft_chain_flags { * * @rules: list of rules in the chain * @list: used internally + * @rhlhead: used internally * @table: table that this chain belongs to * @handle: chain handle * @use: number of jump references to this chain @@ -872,6 +874,7 @@ struct nft_chain { struct nft_rule *__rcu *rules_gen_1; struct list_head rules; struct list_head list; + struct rhlist_head rhlhead; struct nft_table *table; u64 handle; u32 use; @@ -965,7 +968,8 @@ unsigned int nft_do_chain(struct nft_pktinfo *pkt, void *priv); * struct nft_table - nf_tables table * * @list: used internally - * @chains: chains in the table + * @chains_ht: chains in the table + * @chains: same, for stable walks * @sets: sets in the table * @objects: stateful objects in the table * @flowtables: flow tables in the table @@ -979,6 +983,7 @@ unsigned int nft_do_chain(struct nft_pktinfo *pkt, void *priv); */ struct nft_table { struct list_head list; + struct rhltable chains_ht; struct list_head chains; struct list_head sets; struct list_head objects; |
