mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
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3bf195ae60
before:
text data bss dec hex filename
16566 1576 4136 22278 5706 nf_nat.ko
3598 844 0 4442 115a nf_nat_ipv6.ko
3187 844 0 4031 fbf nf_nat_ipv4.ko
after:
text data bss dec hex filename
22948 1612 4136 28696 7018 nf_nat.ko
... with ipv4/v6 nat now provided directly via nf_nat.ko.
Also changes:
ret = nf_nat_ipv4_fn(priv, skb, state);
if (ret != NF_DROP && ret != NF_STOLEN &&
into
if (ret != NF_ACCEPT)
return ret;
everywhere.
The nat hooks never should return anything other than
ACCEPT or DROP (and the latter only in rare error cases).
The original code uses multi-line ANDing including assignment-in-if:
if (ret != NF_DROP && ret != NF_STOLEN &&
!(IPCB(skb)->flags & IPSKB_XFRM_TRANSFORMED) &&
(ct = nf_ct_get(skb, &ctinfo)) != NULL) {
I removed this while moving, breaking those in separate conditionals
and moving the assignments into extra lines.
checkpatch still generates some warnings:
1. Overly long lines (of moved code).
Breaking them is even more ugly. so I kept this as-is.
2. use of extern function declarations in a .c file.
This is necessary evil, we must call
nf_nat_l3proto_register() from the nat core now.
All l3proto related functions are removed later in this series,
those prototypes are then removed as well.
v2: keep empty nf_nat_ipv6_csum_update stub for CONFIG_IPV6=n case.
v3: remove IS_ENABLED(NF_NAT_IPV4/6) tests, NF_NAT_IPVx toggles
are removed here.
v4: also get rid of the assignments in conditionals.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
74 lines
2.2 KiB
Plaintext
74 lines
2.2 KiB
Plaintext
#
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# Open vSwitch
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#
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config OPENVSWITCH
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tristate "Open vSwitch"
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depends on INET
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depends on !NF_CONNTRACK || \
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(NF_CONNTRACK && ((!NF_DEFRAG_IPV6 || NF_DEFRAG_IPV6) && \
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(!NF_NAT || NF_NAT) && \
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(!NETFILTER_CONNCOUNT || NETFILTER_CONNCOUNT)))
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select LIBCRC32C
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select MPLS
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select NET_MPLS_GSO
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select DST_CACHE
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select NET_NSH
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---help---
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Open vSwitch is a multilayer Ethernet switch targeted at virtualized
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environments. In addition to supporting a variety of features
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expected in a traditional hardware switch, it enables fine-grained
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programmatic extension and flow-based control of the network. This
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control is useful in a wide variety of applications but is
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particularly important in multi-server virtualization deployments,
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which are often characterized by highly dynamic endpoints and the
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need to maintain logical abstractions for multiple tenants.
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The Open vSwitch datapath provides an in-kernel fast path for packet
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forwarding. It is complemented by a userspace daemon, ovs-vswitchd,
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which is able to accept configuration from a variety of sources and
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translate it into packet processing rules.
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See http://openvswitch.org for more information and userspace
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utilities.
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To compile this code as a module, choose M here: the module will be
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called openvswitch.
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If unsure, say N.
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config OPENVSWITCH_GRE
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tristate "Open vSwitch GRE tunneling support"
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depends on OPENVSWITCH
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depends on NET_IPGRE
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default OPENVSWITCH
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---help---
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If you say Y here, then the Open vSwitch will be able create GRE
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vport.
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Say N to exclude this support and reduce the binary size.
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If unsure, say Y.
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config OPENVSWITCH_VXLAN
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tristate "Open vSwitch VXLAN tunneling support"
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depends on OPENVSWITCH
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depends on VXLAN
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default OPENVSWITCH
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---help---
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If you say Y here, then the Open vSwitch will be able create vxlan vport.
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Say N to exclude this support and reduce the binary size.
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If unsure, say Y.
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config OPENVSWITCH_GENEVE
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tristate "Open vSwitch Geneve tunneling support"
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depends on OPENVSWITCH
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depends on GENEVE
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default OPENVSWITCH
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---help---
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If you say Y here, then the Open vSwitch will be able create geneve vport.
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Say N to exclude this support and reduce the binary size.
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