diff options
| author | Patrick McHardy <kaber@trash.net> | 2015-04-05 14:41:06 +0200 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2015-04-08 16:58:27 +0200 |
| commit | 3dd0673ac3cd7d05cde103396ec7ec410a901de2 (patch) | |
| tree | 4daf53c5aef7eade635652cd37c023fbd4e75bc1 /include/net | |
| parent | 4a8678efbec6b0ea46baafb77cd297e6e02da933 (diff) | |
netfilter: nf_tables: prepare set element accounting for async updates
Use atomic operations for the element count to avoid races with async
updates.
To properly handle the transactional semantics during netlink updates,
deleted but not yet committed elements are accounted for seperately and
are treated as being already removed. This means for the duration of
a netlink transaction, the limit might be exceeded by the amount of
elements deleted. Set implementations must be prepared to handle this.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/netfilter/nf_tables.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/include/net/netfilter/nf_tables.h b/include/net/netfilter/nf_tables.h index a785699329c9..746423332fcb 100644 --- a/include/net/netfilter/nf_tables.h +++ b/include/net/netfilter/nf_tables.h @@ -258,6 +258,7 @@ void nft_unregister_set(struct nft_set_ops *ops); * @dtype: data type (verdict or numeric type defined by userspace) * @size: maximum set size * @nelems: number of elements + * @ndeact: number of deactivated elements queued for removal * @timeout: default timeout value in msecs * @gc_int: garbage collection interval in msecs * @policy: set parameterization (see enum nft_set_policies) @@ -275,7 +276,8 @@ struct nft_set { u32 ktype; u32 dtype; u32 size; - u32 nelems; + atomic_t nelems; + u32 ndeact; u64 timeout; u32 gc_int; u16 policy; |