| Age | Commit message (Collapse) | Author |
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Add ability to set the connection tracking secmark value.
Add ability to set the meta secmark value.
Signed-off-by: Christian Göttsche <cgzones@googlemail.com>
Acked-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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l4 protocols are demuxed by l3num, l4num pair.
However, almost all l4 trackers are l3 agnostic.
Only exceptions are:
- gre, icmp (ipv4 only)
- icmpv6 (ipv6 only)
This commit gets rid of the l3 mapping, l4 trackers can now be looked up
by their IPPROTO_XXX value alone, which gets rid of the additional l3
indirection.
For icmp, ipcmp6 and gre, add a check on state->pf and
return -NF_ACCEPT in case we're asked to track e.g. icmpv6-in-ipv4,
this seems more fitting than using the generic tracker.
Additionally we can kill the 2nd l4proto definitions that were needed
for v4/v6 split -- they are now the same so we can use single l4proto
struct for each protocol, rather than two.
The EXPORT_SYMBOLs can be removed as all these object files are
part of nf_conntrack with no external references.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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We assume they are always set accordingly since a874752a10da
("netfilter: conntrack: timeout interface depend on
CONFIG_NF_CONNTRACK_TIMEOUT"), so we can get rid of this checks.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Using a private template is problematic:
1. We can't assign both a zone and a timeout policy
(zone assigns a conntrack template, so we hit problem 1)
2. Using a template needs to take care of ct refcount, else we'll
eventually free the private template due to ->use underflow.
This patch reworks template policy to instead work with existing conntrack.
As long as such conntrack has not yet been placed into the hash table
(unconfirmed) we can still add the timeout extension.
The only caveat is that we now need to update/correct ct->timeout to
reflect the initial/new state, otherwise the conntrack entry retains the
default 'new' timeout.
Side effect of this change is that setting the policy must
now occur from chains that are evaluated *after* the conntrack lookup
has taken place.
No released kernel contains the timeout policy feature yet, so this change
should be ok.
Changes since v2:
- don't handle 'ct is confirmed case'
- after previous patch, no need to special-case tcp/dccp/sctp timeout
anymore
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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If l3 protocol value is not specified for ct timeout object then use the
value from nft_ctx protocol family.
Signed-off-by: Harsha Sharma <harshasharmaiitr@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Enable conntrack if the user defines a helper to be used from the
ruleset policy.
Fixes: 1a64edf54f55 ("netfilter: nft_ct: add helper set support")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch allows to add, list and delete connection tracking timeout
policies via nft objref infrastructure and assigning these timeout
via nft rule.
%./libnftnl/examples/nft-ct-timeout-add ip raw cttime tcp
Ruleset:
table ip raw {
ct timeout cttime {
protocol tcp;
policy = {established: 111, close: 13 }
}
chain output {
type filter hook output priority -300; policy accept;
ct timeout set "cttime"
}
}
%./libnftnl/examples/nft-rule-ct-timeout-add ip raw output cttime
%conntrack -E
[NEW] tcp 6 111 ESTABLISHED src=172.16.19.128 dst=172.16.19.1
sport=22 dport=41360 [UNREPLIED] src=172.16.19.1 dst=172.16.19.128
sport=41360 dport=22
%nft delete rule ip raw output handle <handle>
%./libnftnl/examples/nft-ct-timeout-del ip raw cttime
Joint work with Pablo Neira.
Signed-off-by: Harsha Sharma <harshasharmaiitr@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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The param helper of nf_ct_helper_ext_add is useless now, then remove
it now.
Signed-off-by: Gao Feng <gfree.wind@vip.163.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Filling in the padding slot in the bpf structure as a bug fix in 'ne'
overlapped with actually using that padding area for something in
'net-next'.
Signed-off-by: David S. Miller <davem@davemloft.net>
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The new connlimit object needs this to properly deal with conntrack
dependencies.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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In the nft_ct_helper_obj_dump(), always priv->helper4 is dereferenced.
But if family is ipv6, priv->helper6 should be dereferenced.
Steps to reproduces:
#test.nft
table ip6 filter {
ct helper ftp {
type "ftp" protocol tcp
}
chain input {
type filter hook input priority 4;
ct helper set "ftp"
}
}
%nft -f test.nft
%nft list ruleset
we can see the below messages:
[ 916.286233] kasan: GPF could be caused by NULL-ptr deref or user memory access
[ 916.294777] general protection fault: 0000 [#1] SMP DEBUG_PAGEALLOC KASAN PTI
[ 916.302613] Modules linked in: nft_objref nf_conntrack_sip nf_conntrack_snmp nf_conntrack_broadcast nf_conntrack_ftp nft_ct nf_conntrack nf_tables nfnetlink [last unloaded: nfnetlink]
[ 916.318758] CPU: 1 PID: 2093 Comm: nft Not tainted 4.17.0-rc4+ #181
[ 916.326772] Hardware name: To be filled by O.E.M. To be filled by O.E.M./Aptio CRB, BIOS 5.6.5 07/08/2015
[ 916.338773] RIP: 0010:strlen+0x1a/0x90
[ 916.342781] RSP: 0018:ffff88010ff0f2f8 EFLAGS: 00010292
[ 916.346773] RAX: dffffc0000000000 RBX: ffff880119b26ee8 RCX: ffff88010c150038
[ 916.354777] RDX: 0000000000000002 RSI: ffff880119b26ee8 RDI: 0000000000000010
[ 916.362773] RBP: 0000000000000010 R08: 0000000000007e88 R09: ffff88010c15003c
[ 916.370773] R10: ffff88010c150037 R11: ffffed002182a007 R12: ffff88010ff04040
[ 916.378779] R13: 0000000000000010 R14: ffff880119b26f30 R15: ffff88010ff04110
[ 916.387265] FS: 00007f57a1997700(0000) GS:ffff88011b800000(0000) knlGS:0000000000000000
[ 916.394785] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 916.402778] CR2: 00007f57a0ac80f0 CR3: 000000010ff02000 CR4: 00000000001006e0
[ 916.410772] Call Trace:
[ 916.414787] nft_ct_helper_obj_dump+0x94/0x200 [nft_ct]
[ 916.418779] ? nft_ct_set_eval+0x560/0x560 [nft_ct]
[ 916.426771] ? memset+0x1f/0x40
[ 916.426771] ? __nla_reserve+0x92/0xb0
[ 916.434774] ? memcpy+0x34/0x50
[ 916.434774] nf_tables_fill_obj_info+0x484/0x860 [nf_tables]
[ 916.442773] ? __nft_release_basechain+0x600/0x600 [nf_tables]
[ 916.450779] ? lock_acquire+0x193/0x380
[ 916.454771] ? lock_acquire+0x193/0x380
[ 916.458789] ? nf_tables_dump_obj+0x148/0xcb0 [nf_tables]
[ 916.462777] nf_tables_dump_obj+0x5f0/0xcb0 [nf_tables]
[ 916.470769] ? __alloc_skb+0x30b/0x500
[ 916.474779] netlink_dump+0x752/0xb50
[ 916.478775] __netlink_dump_start+0x4d3/0x750
[ 916.482784] nf_tables_getobj+0x27a/0x930 [nf_tables]
[ 916.490774] ? nft_obj_notify+0x100/0x100 [nf_tables]
[ 916.494772] ? nf_tables_getobj+0x930/0x930 [nf_tables]
[ 916.502579] ? nf_tables_dump_flowtable_done+0x70/0x70 [nf_tables]
[ 916.506774] ? nft_obj_notify+0x100/0x100 [nf_tables]
[ 916.514808] nfnetlink_rcv_msg+0x8ab/0xa86 [nfnetlink]
[ 916.518771] ? nfnetlink_rcv_msg+0x550/0xa86 [nfnetlink]
[ 916.526782] netlink_rcv_skb+0x23e/0x360
[ 916.530773] ? nfnetlink_bind+0x200/0x200 [nfnetlink]
[ 916.534778] ? debug_check_no_locks_freed+0x280/0x280
[ 916.542770] ? netlink_ack+0x870/0x870
[ 916.546786] ? ns_capable_common+0xf4/0x130
[ 916.550765] nfnetlink_rcv+0x172/0x16c0 [nfnetlink]
[ 916.554771] ? sched_clock_local+0xe2/0x150
[ 916.558774] ? sched_clock_cpu+0x144/0x180
[ 916.566575] ? lock_acquire+0x380/0x380
[ 916.570775] ? sched_clock_local+0xe2/0x150
[ 916.574765] ? nfnetlink_net_init+0x130/0x130 [nfnetlink]
[ 916.578763] ? sched_clock_cpu+0x144/0x180
[ 916.582770] ? lock_acquire+0x193/0x380
[ 916.590771] ? lock_acquire+0x193/0x380
[ 916.594766] ? lock_acquire+0x380/0x380
[ 916.598760] ? netlink_deliver_tap+0x262/0xa60
[ 916.602766] ? lock_acquire+0x193/0x380
[ 916.606766] netlink_unicast+0x3ef/0x5a0
[ 916.610771] ? netlink_attachskb+0x630/0x630
[ 916.614763] netlink_sendmsg+0x72a/0xb00
[ 916.618769] ? netlink_unicast+0x5a0/0x5a0
[ 916.626766] ? _copy_from_user+0x92/0xc0
[ 916.630773] __sys_sendto+0x202/0x300
[ 916.634772] ? __ia32_sys_getpeername+0xb0/0xb0
[ 916.638759] ? lock_acquire+0x380/0x380
[ 916.642769] ? lock_acquire+0x193/0x380
[ 916.646761] ? finish_task_switch+0xf4/0x560
[ 916.650763] ? __schedule+0x582/0x19a0
[ 916.655301] ? __sched_text_start+0x8/0x8
[ 916.655301] ? up_read+0x1c/0x110
[ 916.655301] ? __do_page_fault+0x48b/0xaa0
[ 916.655301] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe
[ 916.655301] __x64_sys_sendto+0xdd/0x1b0
[ 916.655301] do_syscall_64+0x96/0x3d0
[ 916.655301] entry_SYSCALL_64_after_hwframe+0x49/0xbe
[ 916.655301] RIP: 0033:0x7f57a0ff5e03
[ 916.655301] RSP: 002b:00007fff6367e0a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[ 916.655301] RAX: ffffffffffffffda RBX: 00007fff6367f1e0 RCX: 00007f57a0ff5e03
[ 916.655301] RDX: 0000000000000020 RSI: 00007fff6367e110 RDI: 0000000000000003
[ 916.655301] RBP: 00007fff6367e100 R08: 00007f57a0ce9160 R09: 000000000000000c
[ 916.655301] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff6367e110
[ 916.655301] R13: 0000000000000020 R14: 00007f57a153c610 R15: 0000562417258de0
[ 916.655301] Code: ff ff ff 0f 1f 40 00 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 fa 53 48 c1 ea 03 48 b8 00 00 00 00 00 fc ff df 48 89 fd 48 83 ec 08 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f
[ 916.655301] RIP: strlen+0x1a/0x90 RSP: ffff88010ff0f2f8
[ 916.771929] ---[ end trace 1065e048e72479fe ]---
[ 916.777204] Kernel panic - not syncing: Fatal exception
[ 916.778158] Kernel Offset: 0x14000000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Acked-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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All existing keys, except the NFT_CT_SRC and NFT_CT_DST are assumed to
have strict datatypes. This is causing problems with sets and
concatenations given the specific length of these keys is not known.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Acked-by: Florian Westphal <fw@strlen.de>
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Place all existing user defined tables in struct net *, instead of
having one list per family. This saves us from one level of indentation
in netlink dump functions.
Place pointer to struct nft_af_info in struct nft_table temporarily, as
we still need this to put back reference module reference counter on
table removal.
This patch comes in preparation for the removal of struct nft_af_info.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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So we can call this from other expression that need conntrack in place
to work.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Acked-by: Florian Westphal <fw@strlen.de>
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This patch adds support for overloading stateful objects operations
through the select_ops() callback, just as it is implemented for
expressions.
This change is needed for upcoming additions to the stateful objects
infrastructure.
Signed-off-by: Pablo M. Bermudo Garay <pablombg@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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And convert module_put invocation to nf_conntrack_helper_put, this is
prepared for the followup patch, which will add a refcnt for cthelper,
so we can reject the deleting request when cthelper is in use.
Signed-off-by: Liping Zhang <zlpnobody@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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By default the kernel emits all ctnetlink events for a connection.
This allows to select the types of events to generate.
This can be used to e.g. only send DESTROY events but no NEW/UPDATE ones
and will work even if sysctl net.netfilter.nf_conntrack_events is set to 0.
This was already possible via iptables' CT target, but the nft version has
the advantage that it can also be used with already-established conntracks.
The added nf_ct_is_template() check isn't a bug fix as we only support
mark and labels (and unlike ecache the conntrack core doesn't copy those).
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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resurrect an old patch from Pablo Neira to remove the untracked objects.
Currently, there are four possible states of an skb wrt. conntrack.
1. No conntrack attached, ct is NULL.
2. Normal (kmem cache allocated) ct attached.
3. a template (kmalloc'd), not in any hash tables at any point in time
4. the 'untracked' conntrack, a percpu nf_conn object, tagged via
IPS_UNTRACKED_BIT in ct->status.
Untracked is supposed to be identical to case 1. It exists only
so users can check
-m conntrack --ctstate UNTRACKED vs.
-m conntrack --ctstate INVALID
e.g. attempts to set connmark on INVALID or UNTRACKED conntracks is
supposed to be a no-op.
Thus currently we need to check
ct == NULL || nf_ct_is_untracked(ct)
in a lot of places in order to avoid altering untracked objects.
The other consequence of the percpu untracked object is that all
-j NOTRACK (and, later, kfree_skb of such skbs) result in an atomic op
(inc/dec the untracked conntracks refcount).
This adds a new kernel-private ctinfo state, IP_CT_UNTRACKED, to
make the distinction instead.
The (few) places that care about packet invalid (ct is NULL) vs.
packet untracked now need to test ct == NULL vs. ctinfo == IP_CT_UNTRACKED,
but all other places can omit the nf_ct_is_untracked() check.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Remove & from function pointers to conform to the style found elsewhere
in the file. Done using the following semantic patch
// <smpl>
@r@
identifier f;
@@
f(...) { ... }
@@
identifier r.f;
@@
- &f
+ f
// </smpl>
Signed-off-by: Arushi Singhal <arushisinghal19971997@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Conflicts:
drivers/net/ethernet/broadcom/genet/bcmmii.c
drivers/net/hyperv/netvsc.c
kernel/bpf/hashtab.c
Almost entirely overlapping changes.
Signed-off-by: David S. Miller <davem@davemloft.net>
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We should jump to invoke __nft_ct_set_destroy() instead of just
return error.
Fixes: edee4f1e9245 ("netfilter: nft_ct: add zone id set support")
Signed-off-by: Liping Zhang <zlpnobody@gmail.com>
Acked-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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this allows to assign connection tracking helpers to
connections via nft objref infrastructure.
The idea is to first specifiy a helper object:
table ip filter {
ct helper some-name {
type "ftp"
protocol tcp
l3proto ip
}
}
and then assign it via
nft add ... ct helper set "some-name"
helper assignment works for new conntracks only as we cannot expand the
conntrack extension area once it has been committed to the main conntrack
table.
ipv4 and ipv6 protocols are tracked stored separately so
we can also handle families that observe both ipv4 and ipv6 traffic.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Currently, there are two different methods to store an u16 integer to
the u32 data register. For example:
u32 *dest = ®s->data[priv->dreg];
1. *dest = 0; *(u16 *) dest = val_u16;
2. *dest = val_u16;
For method 1, the u16 value will be stored like this, either in
big-endian or little-endian system:
0 15 31
+-+-+-+-+-+-+-+-+-+-+-+-+
| Value | 0 |
+-+-+-+-+-+-+-+-+-+-+-+-+
For method 2, in little-endian system, the u16 value will be the same
as listed above. But in big-endian system, the u16 value will be stored
like this:
0 15 31
+-+-+-+-+-+-+-+-+-+-+-+-+
| 0 | Value |
+-+-+-+-+-+-+-+-+-+-+-+-+
So later we use "memcmp(®s->data[priv->sreg], data, 2);" to do
compare in nft_cmp, nft_lookup expr ..., method 2 will get the wrong
result in big-endian system, as 0~15 bits will always be zero.
For the similar reason, when loading an u16 value from the u32 data
register, we should use "*(u16 *) sreg;" instead of "(u16)*sreg;",
the 2nd method will get the wrong value in the big-endian system.
So introduce some wrapper functions to store/load an u8 or u16
integer to/from the u32 data register, and use them in the right
place.
Signed-off-by: Liping Zhang <zlpnobody@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Dan reports:
net/netfilter/nft_ct.c:549 nft_ct_set_init()
error: uninitialized symbol 'len'.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Fixes: edee4f1e924582 ("netfilter: nft_ct: add zone id set support")
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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zones allow tracking multiple connections sharing identical tuples,
this is needed e.g. when tracking distinct vlans with overlapping ip
addresses (conntrack is l2 agnostic).
Thus the zone has to be set before the packet is picked up by the
connection tracker. This is done by means of 'conntrack templates' which
are conntrack structures used solely to pass this info from one netfilter
hook to the next.
The iptables CT target instantiates these connection tracking templates
once per rule, i.e. the template is fixed/tied to particular zone, can
be read-only and therefore be re-used by as many skbs simultaneously as
needed.
We can't follow this model because we want to take the zone id from
an sreg at rule eval time so we could e.g. fill in the zone id from
the packets vlan id or a e.g. nftables key : value maps.
To avoid cost of per packet alloc/free of the template, use a percpu
template 'scratch' object and use the refcount to detect the (unlikely)
case where the template is still attached to another skb (i.e., previous
skb was nfqueued ...).
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Next patch will add ZONE_ID set support which will need similar
error unwind (put operation) as conntrack labels.
Prepare for this: remove the 'label_got' boolean in favor
of a switch statement that can be extended in next patch.
As we already have that in the set_destroy function place that in
a separate function and call it from the set init function.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Just like with counters the direction attribute is optional.
We set priv->dir to MAX unconditionally to avoid duplicating the assignment
for all keys with optional direction.
For keys where direction is mandatory, existing code already returns
an error.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Add a helper to assign a nf_conn entry and the ctinfo bits to an sk_buff.
This avoids changing code in followup patch that merges skb->nfct and
skb->nfctinfo into skb->_nfct.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Similar to xt_connbytes, user can match how many average bytes per packet
a connection has transferred so far.
Signed-off-by: Liping Zhang <zlpnobody@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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currently aliased to try_module_get/_put.
Will be changed in next patch when we add functions to make use of ->net
argument to store usercount per l3proto tracker.
This is needed to avoid registering the conntrack hooks in all netns and
later only enable connection tracking in those that need conntrack.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch adds notrack support.
I decided to add a new expression, given that this doesn't fit into the
existing set operation. Notrack doesn't need a source register, and an
hypothetical NFT_CT_NOTRACK key makes no sense since matching the
untracked state is done through NFT_CT_STATE.
I'm placing this new notrack expression into nft_ct.c, I think a single
module is too much.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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NFT_CT_MARK is unrelated to direction, so if NFTA_CT_DIRECTION attr is
specified, report EINVAL to the userspace. This validation check was
already done at nft_ct_get_init, but we missed it in nft_ct_set_init.
Signed-off-by: Liping Zhang <liping.zhang@spreadtrum.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Currently, if the user want to match ct l3proto, we must specify the
direction, for example:
# nft add rule filter input ct original l3proto ipv4
^^^^^^^^
Otherwise, error message will be reported:
# nft add rule filter input ct l3proto ipv4
nft add rule filter input ct l3proto ipv4
<cmdline>:1:1-38: Error: Could not process rule: Invalid argument
add rule filter input ct l3proto ipv4
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Actually, there's no need to require NFTA_CT_DIRECTION attr, because
ct l3proto and protocol are unrelated to direction.
And for compatibility, even if the user specify the NFTA_CT_DIRECTION
attr, do not report error, just skip it.
Signed-off-by: Liping Zhang <liping.zhang@spreadtrum.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Pablo Neira Ayuso says:
====================
Netfilter/IPVS updates for net-next
The following patchset contains Netfilter/IPVS updates for net-next,
they are:
1) Count pre-established connections as active in "least connection"
schedulers such that pre-established connections to avoid overloading
backend servers on peak demands, from Michal Kubecek via Simon Horman.
2) Address a race condition when resizing the conntrack table by caching
the bucket size when fulling iterating over the hashtable in these
three possible scenarios: 1) dump via /proc/net/nf_conntrack,
2) unlinking userspace helper and 3) unlinking custom conntrack timeout.
From Liping Zhang.
3) Revisit early_drop() path to perform lockless traversal on conntrack
eviction under stress, use del_timer() as synchronization point to
avoid two CPUs evicting the same entry, from Florian Westphal.
4) Move NAT hlist_head to nf_conn object, this simplifies the existing
NAT extension and it doesn't increase size since recent patches to
align nf_conn, from Florian.
5) Use rhashtable for the by-source NAT hashtable, also from Florian.
6) Don't allow --physdev-is-out from OUTPUT chain, just like
--physdev-out is not either, from Hangbin Liu.
7) Automagically set on nf_conntrack counters if the user tries to
match ct bytes/packets from nftables, from Liping Zhang.
8) Remove possible_net_t fields in nf_tables set objects since we just
simply pass the net pointer to the backend set type implementations.
9) Fix possible off-by-one in h323, from Toby DiPasquale.
10) early_drop() may be called from ctnetlink patch, so we must hold
rcu read size lock from them too, this amends Florian's patch #3
coming in this batch, from Liping Zhang.
11) Use binary search to validate jump offset in x_tables, this
addresses the O(n!) validation that was introduced recently
resolve security issues with unpriviledge namespaces, from Florian.
12) Fix reference leak to connlabel in error path of nft_ct, from Zhang.
13) Three updates for nft_log: Fix log prefix leak in error path. Bail
out on loglevel larger than debug in nft_log and set on the new
NF_LOG_F_COPY_LEN flag when snaplen is specified. Again from Zhang.
14) Allow to filter rule dumps in nf_tables based on table and chain
names.
15) Simplify connlabel to always use 128 bits to store labels and
get rid of unused function in xt_connlabel, from Florian.
16) Replace set_expect_timeout() by mod_timer() from the h323 conntrack
helper, by Gao Feng.
17) Put back x_tables module reference in nft_compat on error, from
Liping Zhang.
18) Add a reference count to the x_tables extensions cache in
nft_compat, so we can remove them when unused and avoid a crash
if the extensions are rmmod, again from Zhang.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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The conntrack label extension is currently variable-sized, e.g. if
only 2 labels are used by iptables rules then the labels->bits[] array
will only contain one element.
We track size of each label storage area in the 'words' member.
But in nftables and openvswitch we always have to ask for worst-case
since we don't know what bit will be used at configuration time.
As most arches are 64bit we need to allocate 24 bytes in this case:
struct nf_conn_labels {
u8 words; /* 0 1 */
/* XXX 7 bytes hole, try to pack */
long unsigned bits[2]; /* 8 24 */
Make bits a fixed size and drop the words member, it simplifies
the code and only increases memory requirements on x86 when
less than 64bit labels are required.
We still only allocate the extension if its needed.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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We only get nf_connlabels if the user add ct label set expr successfully,
but we will also put nf_connlabels if the user delete ct lable get expr.
This is mismathced, and will cause ct label expr cannot work properly.
Also, if we init something fail, we should put nf_connlabels back.
Otherwise, we may waste to alloc the memory that will never be used.
Signed-off-by: Liping Zhang <liping.zhang@spreadtrum.com>
Acked-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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If we want to use ct packets expr, and add a rule like follows:
# nft add rule filter input ct packets gt 1 counter
We will find that no packets will hit it, because
nf_conntrack_acct is disabled by default. So It will
not work until we enable it manually via
"echo 1 > /proc/sys/net/netfilter/nf_conntrack_acct".
This is not friendly, so like xt_connbytes do, if the user
want to use ct byte/packet expr, enable nf_conntrack_acct
automatically.
Signed-off-by: Liping Zhang <liping.zhang@spreadtrum.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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We need to compute timeout.expires - jiffies, not the other way around.
Add a helper, another patch can then later change more places in
conntrack code where we currently open-code this.
Will allow us to only change one place later when we remove per-ct timer.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Conntrack labels are currently sized depending on the iptables
ruleset, i.e. if we're asked to test or set bits 1, 2, and 65 then we
would allocate enough room to store at least bit 65.
However, with nft, the input is just a register with arbitrary runtime
content.
We therefore ask for the upper ceiling we currently have, which is
enough room to store 128 bits.
Alternatively, we could alter nf_connlabel_replace to increase
net->ct.label_words at run time, but since 128 bits is not that
big we'd only save sizeof(long) so it doesn't seem worth it for now.
This follows a similar approach that xtables 'connlabel'
match uses, so when user inputs
ct label set bar
then we will set the bit used by the 'bar' label and leave the rest alone.
This is done by passing the sreg content to nf_connlabels_replace
as both value and mask argument.
Labels (bits) already set thus cannot be re-set to zero, but
this is not supported by xtables connlabel match either.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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nf_connlabel_set() takes the bit number that we would like to set.
nf_connlabels_get() however took the number of bits that we want to
support.
So e.g. nf_connlabels_get(32) support bits 0 to 31, but not 32.
This changes nf_connlabels_get() to take the highest bit that we want
to set.
Callers then don't have to cope with a potential integer wrap
when using nf_connlabels_get(bit + 1) anymore.
Current callers are fine, this change is only to make folloup
nft ct label set support simpler.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This is accidental, they don't depend on the label infrastructure.
Fixes: 48f66c905a97 ("netfilter: nft_ct: add byte/packet counter support")
Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Acked-by: Florian Westphal <fw@strlen.de>
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Pablo Neira Ayuso says:
====================
Netfilter updates for net-next
The following patchset contains Netfilter updates for net-next, they are:
1) Release nf_tables objects on netns destructions via
nft_release_afinfo().
2) Destroy basechain and rules on netdevice removal in the new netdev
family.
3) Get rid of defensive check against removal of inactive objects in
nf_tables.
4) Pass down netns pointer to our existing nfnetlink callbacks, as well
as commit() and abort() nfnetlink callbacks.
5) Allow to invert limit expression in nf_tables, so we can throttle
overlimit traffic.
6) Add packet duplication for the netdev family.
7) Add forward expression for the netdev family.
8) Define pr_fmt() in conntrack helpers.
9) Don't leave nfqueue configuration on inconsistent state in case of
errors, from Ken-ichirou MATSUZAWA, follow up patches are also from
him.
10) Skip queue option handling after unbind.
11) Return error on unknown both in nfqueue and nflog command.
12) Autoload ctnetlink when NFQA_CFG_F_CONNTRACK is set.
13) Add new NFTA_SET_USERDATA attribute to store user data in sets,
from Carlos Falgueras.
14) Add support for 64 bit byteordering changes nf_tables, from Florian
Westphal.
15) Add conntrack byte/packet counter matching support to nf_tables,
also from Florian.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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If the accounting extension isn't present, we'll return a counter
value of 0.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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one nft userspace test case fails with
'ct l3proto original ipv4' mismatches 'ct l3proto ipv4'
... because NFTA_CT_DIRECTION attr is missing.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Switch the nf_tables registers from 128 bit addressing to 32 bit
addressing to support so called concatenations, where multiple values
can be concatenated over multiple registers for O(1) exact matches of
multiple dimensions using sets.
The old register values are mapped to areas of 128 bits for compatibility.
When dumping register numbers, values are expressed using the old values
if they refer to the beginning of a 128 bit area for compatibility.
To support concatenations, register loads of less than a full 32 bit
value need to be padded. This mainly affects the payload and exthdr
expressions, which both unconditionally zero the last word before
copying the data.
Userspace fully passes the testsuite using both old and new register
addressing.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Add helper functions to parse and dump register values in netlink attributes.
These helpers will later be changed to take care of translation between the
old 128 bit and the new 32 bit register numbers.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Simple conversion to use u32 pointers to the beginning of the registers
to keep follow up patches smaller.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Replace the array of registers passed to expressions by a struct nft_regs,
containing the verdict as a seperate member, which aliases to the
NFT_REG_VERDICT register.
This is needed to seperate the verdict from the data registers completely,
so their size can be changed.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Change nft_validate_input_register() to not only validate the input
register number, but also the length of the load, and rename it to
nft_validate_register_load() to reflect that change.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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All users of nft_validate_register_store() first invoke
nft_validate_output_register(). There is in fact no use for using it
on its own, so simplify the code by folding the functionality into
nft_validate_register_store() and kill it.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Christian Göttsche
Florian Westphal
Pablo Neira Ayuso
Harsha Sharma
Gao Feng
David S. Miller
Taehee Yoo
Pablo M. Bermudo Garay
Liping Zhang
Arushi Singhal
Liping Zhang
Patrick McHardy