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conntrack zones are heavily used by tools like openvswitch to run
multiple virtual "routers" on a single machine. In this context each
conntrack zone matches to a single router, thereby preventing
overlapping IPs from becoming issues.
In these systems it is common to operate on all conntrack entries of a
given zone, e.g. to delete them when a router is deleted. Previously this
required these tools to dump the full conntrack table and filter out the
relevant entries in userspace potentially causing performance issues.
To do this we reuse the existing CTA_ZONE attribute. This was previous
parsed but not used during dump and flush requests. Now if CTA_ZONE is
set we filter these operations based on the provided zone.
However this means that users that previously passed CTA_ZONE will
experience a difference in functionality.
Alternatively CTA_FILTER could have been used for the same
functionality. However it is not yet supported during flush requests and
is only available when using AF_INET or AF_INET6.
Co-developed-by: Luca Czesla <luca.czesla@mail.schwarz>
Signed-off-by: Luca Czesla <luca.czesla@mail.schwarz>
Co-developed-by: Max Lamprecht <max.lamprecht@mail.schwarz>
Signed-off-by: Max Lamprecht <max.lamprecht@mail.schwarz>
Signed-off-by: Felix Huettner <felix.huettner@mail.schwarz>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Compare NETFILTER_CFG type audit logs emitted from kernel upon ruleset
modifications against expected output.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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causes:
BUG: KASAN: slab-out-of-bounds in sk_free+0x25/0x80
Write of size 4 at addr ffff888106df0284 by task nf-queue/1459
sk_free+0x25/0x80
nf_queue_entry_release_refs+0x143/0x1a0
nf_reinject+0x233/0x770
... without 'netfilter: nf_queue: don't assume sk is full socket'.
Signed-off-by: Florian Westphal <fw@strlen.de>
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Prevent them from polluting git status after building selftests.
Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
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Felix Huettner
Phil Sutter
Florian Westphal
Gabriel Krisman Bertazi