- 03 Oct, 2018 1 commit
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Chenbo Feng authored
A major flaw of the current xt_quota module is that quota in a specific rule gets reset every time there is a rule change in the same table. It makes the xt_quota module not very useful in a table in which iptables rules are changed at run time. This fix introduces a new counter that is visible to userspace as the remaining quota of the current rule. When userspace restores the rules in a table, it can restore the counter to the remaining quota instead of resetting it to the full quota. Signed-off-by:
Chenbo Feng <fengc@google.com> Suggested-by:
Maciej Żenczykowski <maze@google.com> Reviewed-by:
Pablo Neira Ayuso <pablo@netfilter.org>
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- 28 Sep, 2018 5 commits
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Taehee Yoo authored
Internally, rhashtable_lookup_fast() calls rcu_read_lock() then, calls rhashtable_lookup(). so that in places where are guaranteed by rcu read lock, rhashtable_lookup() is enough. Signed-off-by:
Taehee Yoo <ap420073@gmail.com> Signed-off-by:
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Taehee Yoo authored
nf_flow_offload_{ip/ipv6}_hook() check nat flag then, call nf_flow_nat_{ip/ipv6} but that also check nat flag. so that nat flag check code in nf_flow_offload_{ip/ipv6}_hook() are unnecessary. Signed-off-by: -
Christian Göttsche authored
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:
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Christian Göttsche authored
Add the ability to set the security context of packets within the nf_tables framework. Add a nft_object for holding security contexts in the kernel and manipulating packets on the wire. Convert the security context strings at rule addition time to security identifiers. This is the same behavior like in xt_SECMARK and offers better performance than computing it per packet. Set the maximum security context length to 256. Signed-off-by:
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Tan Hu authored
We configured iptables as below, which only allowed incoming data on established connections: iptables -t mangle -A PREROUTING -m state --state ESTABLISHED -j ACCEPT iptables -t mangle -P PREROUTING DROP When deleting a secondary address, current masquerade implements would flush all conntracks on this device. All the established connections on primary address also be deleted, then subsequent incoming data on the connections would be dropped wrongly because it was identified as NEW connection. So when an address was delete, it should only flush connections related with the address. Signed-off-by:
Tan Hu <tan.hu@zte.com.cn> Signed-off-by:
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- 21 Sep, 2018 1 commit
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Florian Westphal authored
else we will oops (null deref) when the attributes aren't present. Also add back the EOPNOTSUPP in case MARK filtering is requested but kernel doesn't support it. Fixes: 59c08c69 ("netfilter: ctnetlink: Support L3 protocol-filter on flush") Reported-by: syzbot+e45eda8eda6e93a03959@syzkaller.appspotmail.com Signed-off-by:
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- 20 Sep, 2018 10 commits
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Taehee Yoo authored
rhashtable_walk_init() is deprecated and rhashtable_walk_enter() can be used instead. rhashtable_walk_init() is wrapper function of rhashtable_walk_enter() so that logic is actually same. But rhashtable_walk_enter() doesn't return error hence error path code can be removed. Signed-off-by:
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Taehee Yoo authored
__nf_nat_mangle_tcp_packet() and nf_nat_mangle_udp_packet() call mangle_contents(). and __nf_nat_mangle_tcp_packet() and mangle_contents() call skb_is_nonlinear(). so that skb_is_nonlinear() in __nf_nat_mangle_tcp_packet() is unnecessary. Signed-off-by:
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Florian Westphal authored
All higher l4proto numbers are handled by the generic tracker; the l4proto lookup function already returns generic one in case the l4proto number exceeds max size. Signed-off-by:
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Florian Westphal authored
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:
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Florian Westphal authored
Its unused, next patch will remove l4proto->l3proto number to simplify l4 protocol demuxer lookup. Signed-off-by:
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Florian Westphal authored
icmp(v6) are the only two layer four protocols that need the error() callback (to handle icmp errors that are related to an established connections, e.g. packet too big, port unreachable and the like). Remove the error callback and handle these two special cases from the core. Signed-off-by:
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Florian Westphal authored
The error() handler gets called before allocating or looking up a connection tracking entry. We can instead use direct calls from the ->packet() handlers which get invoked for every packet anyway. Only exceptions are icmp and icmpv6, these two special cases will be handled in the next patch. Signed-off-by:
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Florian Westphal authored
Only two protocols need the ->error() function: icmp and icmpv6. This is because icmp error mssages might be RELATED to an existing connection (e.g. PMTUD, port unreachable and the like), and their ->error() handlers do this. The error callback is already optional, so remove it for udp and call them from ->packet() instead. As the error() callback can call checksum functions that write to skb->csum*, the const qualifier has to be removed as well. Signed-off-by:
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Florian Westphal authored
->new() gets invoked after ->error() and before ->packet() if a conntrack lookup has found no result for the tuple. We can fold it into ->packet() -- the packet() implementations can check if the conntrack is confirmed (new) or not (already in hash). If its unconfirmed, the conntrack isn't in the hash yet so current skb created a new conntrack entry. Only relevant side effect -- if packet() doesn't return NF_ACCEPT but -NF_ACCEPT (or drop), while the conntrack was just created, then the newly allocated conntrack is freed right away, rather than not created in the first place. Signed-off-by:
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Florian Westphal authored
nf_hook_state contains all the hook meta-information: netns, protocol family, hook location, and so on. Instead of only passing selected information, pass a pointer to entire structure. This will allow to merge the error and the packet handlers and remove the ->new() function in followup patches. Signed-off-by:
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- 17 Sep, 2018 13 commits
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Taehee Yoo authored
nf_nat_redirect_ipv4() and nf_nat_redirect_ipv6() are only called by netfilter hook point. so that rcu_read_lock and rcu_read_unlock() are unnecessary. Signed-off-by:
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Pablo Neira Ayuso authored
We assume they are always set accordingly since a874752a ("netfilter: conntrack: timeout interface depend on CONFIG_NF_CONNTRACK_TIMEOUT"), so we can get rid of this checks. Signed-off-by:
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Florian Westphal authored
There are no external callers anymore, previous change just forgot to also remove the EXPORT_SYMBOL(). Fixes: 9971a514 ("netfilter: nf_nat: add nat type hooks to nat core") Signed-off-by:
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Florian Westphal authored
I see no reason for them, label or timer cannot be NULL, and if they were, we'll crash with null deref anyway. For skb_header_pointer failure, just set hotdrop to true and toss such packet. Signed-off-by:
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Florian Westphal authored
None of these spots really needs to crash the kernel. In one two cases we can jsut report error to userspace, in the other cases we can just use WARN_ON (and leak memory instead). Signed-off-by:
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Pablo Neira Ayuso authored
cgroup v2 path field is PATH_MAX which is too large, this is placing too much pressure on memory allocation for people with many rules doing cgroup v1 classid matching, side effects of this are bug reports like: https://bugzilla.kernel.org/show_bug.cgi?id=200639 This patch registers a new revision that shrinks the cgroup path to 512 bytes, which is the same approach we follow in similar extensions that have a path field. Cc: Tejun Heo <tj@kernel.org> Signed-off-by:
Tejun Heo <tj@kernel.org>
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Kristian Evensen authored
The same connection mark can be set on flows belonging to different address families. This commit adds support for filtering on the L3 protocol when flushing connection track entries. If no protocol is specified, then all L3 protocols match. In order to avoid code duplication and a redundant check, the protocol comparison in ctnetlink_dump_table() has been removed. Instead, a filter is created if the GET-message triggering the dump contains an address family. ctnetlink_filter_match() is then used to compare the L3 protocols. Signed-off-by:
Kristian Evensen <kristian.evensen@gmail.com> Signed-off-by:
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Florian Westphal authored
supports fetching saddr/daddr of tunnel mode states, request id and spi. If direction is 'in', use inbound skb secpath, else dst->xfrm. Joint work with Máté Eckl. Signed-off-by:
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Florian Westphal authored
as of a0ae2562 ("netfilter: conntrack: remove l3proto abstraction") there are no users anymore. Signed-off-by:
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Florian Westphal authored
Release the committed transaction log from a work queue, moving expensive synchronize_rcu out of the locked section and providing opportunity to batch this. On my test machine this cuts runtime of nft-test.py in half. Based on earlier patch from Pablo Neira Ayuso. Signed-off-by:
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Florian Westphal authored
->destroy is only allowed to free data, or do other cleanups that do not have side effects on other state, such as visibility to other netlink requests. Such things need to be done in ->deactivate. As a transaction can fail, we need to make sure we can undo such operations, therefore ->activate() has to be provided too. So print a warning and refuse registration if expr->ops provides only one of the two operations. v2: fix nft_expr_check_ops to not repeat same check twice (Jones Desougi) Signed-off-by:
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Florian Westphal authored
Splits unbind_set into destroy_set and unbinding operation. Unbinding removes set from lists (so new transaction would not find it anymore) but keeps memory allocated (so packet path continues to work). Rebind function is added to allow unrolling in case transaction that wants to remove set is aborted. Destroy function is added to free the memory, but this could occur outside of transaction in the future. Signed-off-by:
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Florian Westphal authored
Useful e.g. to avoid NATting inner headers of to-be-encrypted packets. Signed-off-by:
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- 16 Sep, 2018 6 commits
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Haishuang Yan authored
Same as ip_gre, use gre_parse_header to parse gre header in gre error handler code. Signed-off-by:
Haishuang Yan <yanhaishuang@cmss.chinamobile.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Haishuang Yan authored
gre_parse_header stops parsing when csum_err is encountered, which means tpi->key is undefined and ip_tunnel_lookup will return NULL improperly. This patch introduce a NULL pointer as csum_err parameter. Even when csum_err is encountered, it won't return error and continue parsing gre header as expected. Fixes: 9f57c67c ("gre: Remove support for sharing GRE protocol hook.") Reported-by:
Jiri Benc <jbenc@redhat.com> Signed-off-by:
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Florian Fainelli authored
PHY_POLL is defined as -1 which means that we would be setting all flags of the PHY driver, this is also not a valid flag to tell PHYLIB about, just remove it. Signed-off-by:
Florian Fainelli <f.fainelli@gmail.com> Reviewed-by:
Andrew Lunn <andrew@lunn.ch> Signed-off-by:
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David S. Miller authored
Davide Caratti says: ==================== net/sched: act_police: lockless data path the data path of 'police' action can be faster if we avoid using spinlocks: - patch 1 converts act_police to use per-cpu counters - patch 2 lets act_police use RCU to access its configuration data. test procedure (using pktgen from https://github.com/netoptimizer): # ip link add name eth1 type dummy # ip link set dev eth1 up # tc qdisc add dev eth1 clsact # tc filter add dev eth1 egress matchall action police \ > rate 2gbit burst 100k conform-exceed pass/pass index 100 # for c in 1 2 4; do > ./pktgen_bench_xmit_mode_queue_xmit.sh -v -s 64 -t $c -n 5000000 -i eth1 > done test results (avg. pps/thread): $c | before patch | after patch | improvement ----+--------------+--------------+------------- 1 | 3518448 | 3591240 | irrelevant 2 | 3070065 | 3383393 | 10% 4 | 1540969 | 3238385 | 110% ==================== Signed-off-by:
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Davide Caratti authored
use RCU instead of spinlocks, to protect concurrent read/write on act_police configuration. This reduces the effects of contention in the data path, in case multiple readers are present. Signed-off-by:
Davide Caratti <dcaratti@redhat.com> Signed-off-by:
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Davide Caratti authored
use per-CPU counters, instead of sharing a single set of stats with all cores. This removes the need of using spinlock when statistics are read or updated. Signed-off-by:
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- 14 Sep, 2018 4 commits
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Ganesh Goudar authored
- In CXGB4_DCB_STATE_FW_INCOMPLETE state check if the dcb version is changed and update the dcb supported version. - Also, fill the priority code point value for priority based flow control. Signed-off-by:
Ganesh Goudar <ganeshgr@chelsio.com> Signed-off-by:
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Ganesh Goudar authored
print per rx-queue packet errors in sge_qinfo Signed-off-by:
Casey Leedom <leedom@chelsio.com> Signed-off-by:
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Ganesh Goudar authored
Do not put host-endian 0 or 1 into big endian feild. Reported-by:
Al Viro <viro@zeniv.linux.org.uk> Signed-off-by:
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Li RongQing authored
pcpu_lstats is defined in several files, so unify them as one and move to header file Signed-off-by:
Zhang Yu <zhangyu31@baidu.com> Signed-off-by:
Li RongQing <lirongqing@baidu.com> Signed-off-by:
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