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2021-09-14ipvs: check that ip_vs_conn_tab_bits is between 8 and 20Andrea Claudi1-0/+4
ip_vs_conn_tab_bits may be provided by the user through the conn_tab_bits module parameter. If this value is greater than 31, or less than 0, the shift operator used to derive tab_size causes undefined behaviour. Fix this checking ip_vs_conn_tab_bits value to be in the range specified in ipvs Kconfig. If not, simply use default value. Fixes: 6f7edb4881bf ("IPVS: Allow boot time change of hash size") Reported-by: Yi Chen <yiche@redhat.com> Signed-off-by: Andrea Claudi <aclaudi@redhat.com> Acked-by: Julian Anastasov <ja@ssi.bg> Acked-by: Simon Horman <horms@verge.net.au> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2021-06-07Merge ra.kernel.org:/pub/scm/linux/kernel/git/netdev/netDavid S. Miller1-1/+1
Bug fixes overlapping feature additions and refactoring, mostly. Signed-off-by: David S. Miller <davem@davemloft.net>
2021-05-29netfilter: Remove leading spaces in KconfigJuerg Haefliger1-1/+1
Remove leading spaces before tabs in Kconfig file(s) by running the following command: $ find net/netfilter -name 'Kconfig*' | xargs sed -r -i 's/^[ ]+\t/\t/' Signed-off-by: Juerg Haefliger <juergh@canonical.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2021-05-27ipvs: ignore IP_VS_SVC_F_HASHED flag when adding serviceJulian Anastasov1-1/+1
syzbot reported memory leak [1] when adding service with HASHED flag. We should ignore this flag both from sockopt and netlink provided data, otherwise the service is not hashed and not visible while releasing resources. [1] BUG: memory leak unreferenced object 0xffff888115227800 (size 512): comm "syz-executor263", pid 8658, jiffies 4294951882 (age 12.560s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff83977188>] kmalloc include/linux/slab.h:556 [inline] [<ffffffff83977188>] kzalloc include/linux/slab.h:686 [inline] [<ffffffff83977188>] ip_vs_add_service+0x598/0x7c0 net/netfilter/ipvs/ip_vs_ctl.c:1343 [<ffffffff8397d770>] do_ip_vs_set_ctl+0x810/0xa40 net/netfilter/ipvs/ip_vs_ctl.c:2570 [<ffffffff838449a8>] nf_setsockopt+0x68/0xa0 net/netfilter/nf_sockopt.c:101 [<ffffffff839ae4e9>] ip_setsockopt+0x259/0x1ff0 net/ipv4/ip_sockglue.c:1435 [<ffffffff839fa03c>] raw_setsockopt+0x18c/0x1b0 net/ipv4/raw.c:857 [<ffffffff83691f20>] __sys_setsockopt+0x1b0/0x360 net/socket.c:2117 [<ffffffff836920f2>] __do_sys_setsockopt net/socket.c:2128 [inline] [<ffffffff836920f2>] __se_sys_setsockopt net/socket.c:2125 [inline] [<ffffffff836920f2>] __x64_sys_setsockopt+0x22/0x30 net/socket.c:2125 [<ffffffff84350efa>] do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 [<ffffffff84400068>] entry_SYSCALL_64_after_hwframe+0x44/0xae Reported-and-tested-by: syzbot+e562383183e4b1766930@syzkaller.appspotmail.com Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Julian Anastasov <ja@ssi.bg> Reviewed-by: Simon Horman <horms@verge.net.au> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2021-04-03netfilter: ipvs: do not printk on netns creationFlorian Westphal1-2/+0
This causes dmesg spew during normal operation, so remove this. Signed-off-by: Florian Westphal <fw@strlen.de> Acked-by: Julian Anastasov <ja@ssi.bg> Reviewed-by: Simon Horman <horms@verge.net.au> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2021-03-29netfilter: ipvs: A spello fixBhaskar Chowdhury1-1/+1
s/registerd/registered/ Signed-off-by: Bhaskar Chowdhury <unixbhaskar@gmail.com> Reviewed-by: Simon Horman <horms@verge.net.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-02-07Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-nextJakub Kicinski3-0/+151
Pablo Neira Ayuso says: ==================== Netfilter/IPVS updates for net-next 1) Remove indirection and use nf_ct_get() instead from nfnetlink_log and nfnetlink_queue, from Florian Westphal. 2) Add weighted random twos choice least-connection scheduling for IPVS, from Darby Payne. 3) Add a __hash placeholder in the flow tuple structure to identify the field to be included in the rhashtable key hash calculation. 4) Add a new nft_parse_register_load() and nft_parse_register_store() to consolidate register load and store in the core. 5) Statify nft_parse_register() since it has no more module clients. 6) Remove redundant assignment in nft_cmp, from Colin Ian King. * git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next: netfilter: nftables: remove redundant assignment of variable err netfilter: nftables: statify nft_parse_register() netfilter: nftables: add nft_parse_register_store() and use it netfilter: nftables: add nft_parse_register_load() and use it netfilter: flowtable: add hash offset field to tuple ipvs: add weighted random twos choice algorithm netfilter: ctnetlink: remove get_ct indirection ==================== Link: https://lore.kernel.org/r/20210206015005.23037-1-pablo@netfilter.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-02-05netfilter: move handlers to net/ip_vs.hLeon Romanovsky1-12/+0
Fix the following compilation warnings: net/netfilter/ipvs/ip_vs_proto_tcp.c:147:1: warning: no previous prototype for 'tcp_snat_handler' [-Wmissing-prototypes] 147 | tcp_snat_handler(struct sk_buff *skb, struct ip_vs_protocol *pp, | ^~~~~~~~~~~~~~~~ net/netfilter/ipvs/ip_vs_proto_udp.c:136:1: warning: no previous prototype for 'udp_snat_handler' [-Wmissing-prototypes] 136 | udp_snat_handler(struct sk_buff *skb, struct ip_vs_protocol *pp, | ^~~~~~~~~~~~~~~~ Signed-off-by: Leon Romanovsky <leonro@nvidia.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-01-28net: remove redundant 'depends on NET'Masahiro Yamada1-1/+1
These Kconfig files are included from net/Kconfig, inside the if NET ... endif. Remove 'depends on NET', which we know it is already met. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Link: https://lore.kernel.org/r/20210125232026.106855-1-masahiroy@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-01-26ipvs: add weighted random twos choice algorithmDarby Payne3-0/+151
Adds the random twos choice load-balancing algorithm. The algorithm will pick two random servers based on weights. Then select the server with the least amount of connections normalized by weight. The algorithm avoids the "herd behavior" problem. The algorithm comes from a paper by Michael Mitzenmacher available here http://www.eecs.harvard.edu/~michaelm/NEWWORK/postscripts/twosurvey.pdf Signed-off-by: Darby Payne <darby.payne@gmail.com> Acked-by: Julian Anastasov <ja@ssi.bg> Acked-by: Simon Horman <horms@verge.net.au> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2020-12-15Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-nextJakub Kicinski2-3/+3
Pablo Neira Ayuso says: ==================== Netfilter/IPVS updates for net-next 1) Missing dependencies in NFT_BRIDGE_REJECT, from Randy Dunlap. 2) Use atomic_inc_return() instead of atomic_add_return() in IPVS, from Yejune Deng. 3) Simplify check for overquota in xt_nfacct, from Kaixu Xia. 4) Move nfnl_acct_list away from struct net, from Miao Wang. 5) Pass actual sk in reject actions, from Jan Engelhardt. 6) Add timeout and protoinfo to ctnetlink destroy events, from Florian Westphal. 7) Four patches to generalize set infrastructure to support for multiple expressions per set element. * git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next: netfilter: nftables: netlink support for several set element expressions netfilter: nftables: generalize set extension to support for several expressions netfilter: nftables: move nft_expr before nft_set netfilter: nftables: generalize set expressions support netfilter: ctnetlink: add timeout and protoinfo to destroy events netfilter: use actual socket sk for REJECT action netfilter: nfnl_acct: remove data from struct net netfilter: Remove unnecessary conversion to bool ipvs: replace atomic_add_return() netfilter: nft_reject_bridge: fix build errors due to code movement ==================== Link: https://lore.kernel.org/r/20201212230513.3465-1-pablo@netfilter.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-11-27ipvs: fix possible memory leak in ip_vs_control_net_initWang Hai1-6/+25
kmemleak report a memory leak as follows: BUG: memory leak unreferenced object 0xffff8880759ea000 (size 256): backtrace: [<00000000c0bf2deb>] kmem_cache_zalloc include/linux/slab.h:656 [inline] [<00000000c0bf2deb>] __proc_create+0x23d/0x7d0 fs/proc/generic.c:421 [<000000009d718d02>] proc_create_reg+0x8e/0x140 fs/proc/generic.c:535 [<0000000097bbfc4f>] proc_create_net_data+0x8c/0x1b0 fs/proc/proc_net.c:126 [<00000000652480fc>] ip_vs_control_net_init+0x308/0x13a0 net/netfilter/ipvs/ip_vs_ctl.c:4169 [<000000004c927ebe>] __ip_vs_init+0x211/0x400 net/netfilter/ipvs/ip_vs_core.c:2429 [<00000000aa6b72d9>] ops_init+0xa8/0x3c0 net/core/net_namespace.c:151 [<00000000153fd114>] setup_net+0x2de/0x7e0 net/core/net_namespace.c:341 [<00000000be4e4f07>] copy_net_ns+0x27d/0x530 net/core/net_namespace.c:482 [<00000000f1c23ec9>] create_new_namespaces+0x382/0xa30 kernel/nsproxy.c:110 [<00000000098a5757>] copy_namespaces+0x2e6/0x3b0 kernel/nsproxy.c:179 [<0000000026ce39e9>] copy_process+0x220a/0x5f00 kernel/fork.c:2072 [<00000000b71f4efe>] _do_fork+0xc7/0xda0 kernel/fork.c:2428 [<000000002974ee96>] __do_sys_clone3+0x18a/0x280 kernel/fork.c:2703 [<0000000062ac0a4d>] do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 [<0000000093f1ce2c>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 In the error path of ip_vs_control_net_init(), remove_proc_entry() needs to be called to remove the added proc entry, otherwise a memory leak will occur. Also, add some '#ifdef CONFIG_PROC_FS' because proc_create_net* return NULL when PROC is not used. Fixes: b17fc9963f83 ("IPVS: netns, ip_vs_stats and its procfs") Fixes: 61b1ab4583e2 ("IPVS: netns, add basic init per netns.") Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Wang Hai <wanghai38@huawei.com> Acked-by: Julian Anastasov <ja@ssi.bg> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2020-11-22ipvs: replace atomic_add_return()Yejune Deng2-3/+3
atomic_inc_return() looks better Signed-off-by: Yejune Deng <yejune.deng@gmail.com> Acked-by: Julian Anastasov <ja@ssi.bg> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2020-10-30netfilter: use actual socket sk rather than skb sk when routing harderJason A. Donenfeld1-2/+2
If netfilter changes the packet mark when mangling, the packet is rerouted using the route_me_harder set of functions. Prior to this commit, there's one big difference between route_me_harder and the ordinary initial routing functions, described in the comment above __ip_queue_xmit(): /* Note: skb->sk can be different from sk, in case of tunnels */ int __ip_queue_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl, That function goes on to correctly make use of sk->sk_bound_dev_if, rather than skb->sk->sk_bound_dev_if. And indeed the comment is true: a tunnel will receive a packet in ndo_start_xmit with an initial skb->sk. It will make some transformations to that packet, and then it will send the encapsulated packet out of a *new* socket. That new socket will basically always have a different sk_bound_dev_if (otherwise there'd be a routing loop). So for the purposes of routing the encapsulated packet, the routing information as it pertains to the socket should come from that socket's sk, rather than the packet's original skb->sk. For that reason __ip_queue_xmit() and related functions all do the right thing. One might argue that all tunnels should just call skb_orphan(skb) before transmitting the encapsulated packet into the new socket. But tunnels do *not* do this -- and this is wisely avoided in skb_scrub_packet() too -- because features like TSQ rely on skb->destructor() being called when that buffer space is truely available again. Calling skb_orphan(skb) too early would result in buffers filling up unnecessarily and accounting info being all wrong. Instead, additional routing must take into account the new sk, just as __ip_queue_xmit() notes. So, this commit addresses the problem by fishing the correct sk out of state->sk -- it's already set properly in the call to nf_hook() in __ip_local_out(), which receives the sk as part of its normal functionality. So we make sure to plumb state->sk through the various route_me_harder functions, and then make correct use of it following the example of __ip_queue_xmit(). Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Reviewed-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2020-10-20ipvs: adjust the debug info in function set_tcp_statelongguang.yue1-4/+6
Outputting client,virtual,dst addresses info when tcp state changes, which makes the connection debug more clear Signed-off-by: longguang.yue <bigclouds@163.com> Acked-by: Julian Anastasov <ja@ssi.bg> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2020-10-15Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski1-0/+6
Minor conflicts in net/mptcp/protocol.h and tools/testing/selftests/net/Makefile. In both cases code was added on both sides in the same place so just keep both. Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-10-12ipvs: clear skb->tstamp in forwarding pathJulian Anastasov1-0/+6
fq qdisc requires tstamp to be cleared in forwarding path Reported-by: Evgeny B <abt-admin@mail.ru> Link: https://bugzilla.kernel.org/show_bug.cgi?id=209427 Suggested-by: Eric Dumazet <eric.dumazet@gmail.com> Fixes: 8203e2d844d3 ("net: clear skb->tstamp in forwarding paths") Fixes: fb420d5d91c1 ("tcp/fq: move back to CLOCK_MONOTONIC") Fixes: 80b14dee2bea ("net: Add a new socket option for a future transmit time.") Signed-off-by: Julian Anastasov <ja@ssi.bg> Reviewed-by: Simon Horman <horms@verge.net.au> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2020-10-12ipvs: inspect reply packets from DR/TUN real serverslongguang.yue2-15/+22
Just like for MASQ, inspect the reply packets coming from DR/TUN real servers and alter the connection's state and timeout according to the protocol. It's ipvs's duty to do traffic statistic if packets get hit, no matter what mode it is. Signed-off-by: longguang.yue <bigclouds@163.com> Signed-off-by: Julian Anastasov <ja@ssi.bg> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2020-10-05Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-nextDavid S. Miller1-3/+0
Pablo Neira Ayuso says: ==================== Netfilter updates for net-next The following patchset contains Netfilter updates for net-next: 1) Rename 'searched' column to 'clashres' in conntrack /proc/ stats to amend a recent patch, from Florian Westphal. 2) Remove unused nft_data_debug(), from YueHaibing. 3) Remove unused definitions in IPVS, also from YueHaibing. 4) Fix user data memleak in tables and objects, this is also amending a recent patch, from Jose M. Guisado. 5) Use nla_memdup() to allocate user data in table and objects, also from Jose M. Guisado 6) User data support for chains, from Jose M. Guisado 7) Remove unused definition in nf_tables_offload, from YueHaibing. 8) Use kvzalloc() in ip_set_alloc(), from Vasily Averin. 9) Fix false positive reported by lockdep in nfnetlink mutexes, from Florian Westphal. 10) Extend fast variant of cmp for neq operation, from Phil Sutter. 11) Implement fast bitwise variant, also from Phil Sutter. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2020-10-03genetlink: move to smaller ops wherever possibleJakub Kicinski1-3/+3
Bulk of the genetlink users can use smaller ops, move them. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Reviewed-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-22ipvs: Remove unused macrosYueHaibing1-3/+0
They are not used since commit e4ff67513096 ("ipvs: add sync_maxlen parameter for the sync daemon") Signed-off-by: YueHaibing <yuehaibing@huawei.com> Acked-by: Simon Horman <horms@verge.net.au> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2020-09-09Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-nextDavid S. Miller2-4/+4
Pablo Neira Ayuso says: ==================== Netfilter updates for net-next The following patchset contains Netfilter updates for net-next: 1) Rewrite inner header IPv6 in ICMPv6 messages in ip6t_NPT, from Michael Zhou. 2) do_ip_vs_set_ctl() dereferences uninitialized value, from Peilin Ye. 3) Support for userdata in tables, from Jose M. Guisado. 4) Do not increment ct error and invalid stats at the same time, from Florian Westphal. 5) Remove ct ignore stats, also from Florian. 6) Add ct stats for clash resolution, from Florian Westphal. 7) Bump reference counter bump on ct clash resolution only, this is safe because bucket lock is held, again from Florian. 8) Use ip_is_fragment() in xt_HMARK, from YueHaibing. 9) Add wildcard support for nft_socket, from Balazs Scheidler. 10) Remove superfluous IPVS dependency on iptables, from Yaroslav Bolyukin. 11) Remove unused definition in ebt_stp, from Wang Hai. 12) Replace CONFIG_NFT_CHAIN_NAT_{IPV4,IPV6} by CONFIG_NFT_NAT in selftests/net, from Fabian Frederick. 13) Add userdata support for nft_object, from Jose M. Guisado. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-01ipvs: remove dependency on ip6_tablesYaroslav Bolyukin1-1/+0
This dependency was added because ipv6_find_hdr was in iptables specific code but is no longer required Fixes: f8f626754ebe ("ipv6: Move ipv6_find_hdr() out of Netfilter code.") Fixes: 63dca2c0b0e7 ("ipvs: Fix faulty IPv6 extension header handling in IPVS") Signed-off-by: Yaroslav Bolyukin <iam@lach.pw> Acked-by: Julian Anastasov <ja@ssi.bg> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2020-08-28ipvs: Fix uninit-value in do_ip_vs_set_ctl()Peilin Ye1-3/+4
do_ip_vs_set_ctl() is referencing uninitialized stack value when `len` is zero. Fix it. Reported-by: syzbot+23b5f9e7caf61d9a3898@syzkaller.appspotmail.com Link: https://syzkaller.appspot.com/bug?id=46ebfb92a8a812621a001ef04d90dfa459520fe2 Suggested-by: Julian Anastasov <ja@ssi.bg> Signed-off-by: Peilin Ye <yepeilin.cs@gmail.com> Acked-by: Julian Anastasov <ja@ssi.bg> Reviewed-by: Simon Horman <horms@verge.net.au> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2020-08-24treewide: Use fallthrough pseudo-keywordGustavo A. R. Silva2-2/+2
Replace the existing /* fall through */ comments and its variants with the new pseudo-keyword macro fallthrough[1]. Also, remove unnecessary fall-through markings when it is the case. [1] https://www.kernel.org/doc/html/v5.7/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
2020-08-04Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-nextDavid S. Miller3-27/+81
Pablo Neira Ayuso says: ==================== Netfilter updates for net-next 1) UAF in chain binding support from previous batch, from Dan Carpenter. 2) Queue up delayed work to expire connections with no destination, from Andrew Sy Kim. 3) Use fallthrough pseudo-keyword, from Gustavo A. R. Silva. 4) Replace HTTP links with HTTPS, from Alexander A. Klimov. 5) Remove superfluous null header checks in ip6tables, from Gaurav Singh. 6) Add extended netlink error reporting for expression. 7) Report EEXIST on overlapping chain, set elements and flowtable devices. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-26Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netDavid S. Miller1-4/+8
The UDP reuseport conflict was a little bit tricky. The net-next code, via bpf-next, extracted the reuseport handling into a helper so that the BPF sk lookup code could invoke it. At the same time, the logic for reuseport handling of unconnected sockets changed via commit efc6b6f6c3113e8b203b9debfb72d81e0f3dcace which changed the logic to carry on the reuseport result into the rest of the lookup loop if we do not return immediately. This requires moving the reuseport_has_conns() logic into the callers. While we are here, get rid of inline directives as they do not belong in foo.c files. The other changes were cases of more straightforward overlapping modifications. Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-25netfilter: switch nf_setsockopt to sockptr_tChristoph Hellwig1-2/+2
Pass a sockptr_t to prepare for set_fs-less handling of the kernel pointer from bpf-cgroup. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-07-22ipvs: fix the connection sync failed in some casesguodeqing1-4/+8
The sync_thread_backup only checks sk_receive_queue is empty or not, there is a situation which cannot sync the connection entries when sk_receive_queue is empty and sk_rmem_alloc is larger than sk_rcvbuf, the sync packets are dropped in __udp_enqueue_schedule_skb, this is because the packets in reader_queue is not read, so the rmem is not reclaimed. Here I add the check of whether the reader_queue of the udp sock is empty or not to solve this problem. Fixes: 2276f58ac589 ("udp: use a separate rx queue for packet reception") Reported-by: zhouxudong <zhouxudong8@huawei.com> Signed-off-by: guodeqing <geffrey.guo@huawei.com> Acked-by: Julian Anastasov <ja@ssi.bg> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2020-07-22ipvs: queue delayed work to expire no destination connections if ↵Andrew Sy Kim3-27/+81
expire_nodest_conn=1 When expire_nodest_conn=1 and a destination is deleted, IPVS does not expire the existing connections until the next matching incoming packet. If there are many connection entries from a single client to a single destination, many packets may get dropped before all the connections are expired (more likely with lots of UDP traffic). An optimization can be made where upon deletion of a destination, IPVS queues up delayed work to immediately expire any connections with a deleted destination. This ensures any reused source ports from a client (within the IPVS timeouts) are scheduled to new real servers instead of silently dropped. Signed-off-by: Andrew Sy Kim <kim.andrewsy@gmail.com> Signed-off-by: Julian Anastasov <ja@ssi.bg> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2020-07-04ipvs: allow connection reuse for unconfirmed conntrackJulian Anastasov1-5/+7
YangYuxi is reporting that connection reuse is causing one-second delay when SYN hits existing connection in TIME_WAIT state. Such delay was added to give time to expire both the IPVS connection and the corresponding conntrack. This was considered a rare case at that time but it is causing problem for some environments such as Kubernetes. As nf_conntrack_tcp_packet() can decide to release the conntrack in TIME_WAIT state and to replace it with a fresh NEW conntrack, we can use this to allow rescheduling just by tuning our check: if the conntrack is confirmed we can not schedule it to different real server and the one-second delay still applies but if new conntrack was created, we are free to select new real server without any delays. YangYuxi lists some of the problem reports: - One second connection delay in masquerading mode: https://marc.info/?t=151683118100004&r=1&w=2 - IPVS low throughput #70747 https://github.com/kubernetes/kubernetes/issues/70747 - Apache Bench can fill up ipvs service proxy in seconds #544 https://github.com/cloudnativelabs/kube-router/issues/544 - Additional 1s latency in `host -> service IP -> pod` https://github.com/kubernetes/kubernetes/issues/90854 Fixes: f719e3754ee2 ("ipvs: drop first packet to redirect conntrack") Co-developed-by: YangYuxi <yx.atom1@gmail.com> Signed-off-by: YangYuxi <yx.atom1@gmail.com> Signed-off-by: Julian Anastasov <ja@ssi.bg> Reviewed-by: Simon Horman <horms@verge.net.au> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2020-07-01ipvs: avoid expiring many connections from timerJulian Anastasov2-17/+42
Add new functions ip_vs_conn_del() and ip_vs_conn_del_put() to release many IPVS connections in process context. They are suitable for connections found in table when we do not want to overload the timers. Currently, the change is useful for the dropentry delayed work but it will be used also in following patch when flushing connections to failed destinations. Signed-off-by: Julian Anastasov <ja@ssi.bg> Reviewed-by: Simon Horman <horms@verge.net.au> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2020-06-30ipvs: register hooks only with servicesJulian Anastasov2-19/+84
Keep the IPVS hooks registered in Netfilter only while there are configured virtual services. This saves CPU cycles while IPVS is loaded but not used. Signed-off-by: Julian Anastasov <ja@ssi.bg> Reviewed-by: Simon Horman <horms@verge.net.au> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2020-06-13treewide: replace '---help---' in Kconfig files with 'help'Masahiro Yamada1-27/+27
Since commit 84af7a6194e4 ("checkpatch: kconfig: prefer 'help' over '---help---'"), the number of '---help---' has been gradually decreasing, but there are still more than 2400 instances. This commit finishes the conversion. While I touched the lines, I also fixed the indentation. There are a variety of indentation styles found. a) 4 spaces + '---help---' b) 7 spaces + '---help---' c) 8 spaces + '---help---' d) 1 space + 1 tab + '---help---' e) 1 tab + '---help---' (correct indentation) f) 1 tab + 1 space + '---help---' g) 1 tab + 2 spaces + '---help---' In order to convert all of them to 1 tab + 'help', I ran the following commend: $ find . -name 'Kconfig*' | xargs sed -i 's/^[[:space:]]*---help---/\thelp/' Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2020-04-27sysctl: pass kernel pointers to ->proc_handlerChristoph Hellwig1-3/+3
Instead of having all the sysctl handlers deal with user pointers, which is rather hairy in terms of the BPF interaction, copy the input to and from userspace in common code. This also means that the strings are always NUL-terminated by the common code, making the API a little bit safer. As most handler just pass through the data to one of the common handlers a lot of the changes are mechnical. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Andrey Ignatov <rdna@fb.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2020-03-30ipvs: fix uninitialized variable warningHaishuang Yan1-2/+1
If outer_proto is not set, GCC warning as following: In file included from net/netfilter/ipvs/ip_vs_core.c:52: net/netfilter/ipvs/ip_vs_core.c: In function 'ip_vs_in_icmp': include/net/ip_vs.h:233:4: warning: 'outer_proto' may be used uninitialized in this function [-Wmaybe-uninitialized] 233 | printk(KERN_DEBUG pr_fmt(msg), ##__VA_ARGS__); \ | ^~~~~~ net/netfilter/ipvs/ip_vs_core.c:1666:8: note: 'outer_proto' was declared here 1666 | char *outer_proto; | ^~~~~~~~~~~ Fixes: 73348fed35d0 ("ipvs: optimize tunnel dumps for icmp errors") Signed-off-by: Haishuang Yan <yanhaishuang@cmss.chinamobile.com> Acked-by: Julian Anastasov <ja@ssi.bg> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2020-03-27ipvs: optimize tunnel dumps for icmp errorsHaishuang Yan1-20/+26
After strip GRE/UDP tunnel header for icmp errors, it's better to show "GRE/UDP" instead of "IPIP" in debug message. Signed-off-by: Haishuang Yan <yanhaishuang@cmss.chinamobile.com> Acked-by: Julian Anastasov <ja@ssi.bg> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2020-01-24ipvs: fix spelling mistake "to" -> "too"Colin Ian King1-1/+1
There is a spelling mistake in a IP_VS_ERR_RL message. Fix it. Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-12-25net: add bool confirm_neigh parameter for dst_ops.update_pmtuHangbin Liu1-1/+1
The MTU update code is supposed to be invoked in response to real networking events that update the PMTU. In IPv6 PMTU update function __ip6_rt_update_pmtu() we called dst_confirm_neigh() to update neighbor confirmed time. But for tunnel code, it will call pmtu before xmit, like: - tnl_update_pmtu() - skb_dst_update_pmtu() - ip6_rt_update_pmtu() - __ip6_rt_update_pmtu() - dst_confirm_neigh() If the tunnel remote dst mac address changed and we still do the neigh confirm, we will not be able to update neigh cache and ping6 remote will failed. So for this ip_tunnel_xmit() case, _EVEN_ if the MTU is changed, we should not be invoking dst_confirm_neigh() as we have no evidence of successful two-way communication at this point. On the other hand it is also important to keep the neigh reachability fresh for TCP flows, so we cannot remove this dst_confirm_neigh() call. To fix the issue, we have to add a new bool parameter for dst_ops.update_pmtu to choose whether we should do neigh update or not. I will add the parameter in this patch and set all the callers to true to comply with the previous way, and fix the tunnel code one by one on later patches. v5: No change. v4: No change. v3: Do not remove dst_confirm_neigh, but add a new bool parameter in dst_ops.update_pmtu to control whether we should do neighbor confirm. Also split the big patch to small ones for each area. v2: Remove dst_confirm_neigh in __ip6_rt_update_pmtu. Suggested-by: David Miller <davem@davemloft.net> Reviewed-by: Guillaume Nault <gnault@redhat.com> Acked-by: David Ahern <dsahern@gmail.com> Signed-off-by: Hangbin Liu <liuhangbin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-11-27net: port < inet_prot_sock(net) --> inet_port_requires_bind_service(net, port)Maciej Żenczykowski1-1/+1
Note that the sysctl write accessor functions guarantee that: net->ipv4.sysctl_ip_prot_sock <= net->ipv4.ip_local_ports.range[0] invariant is maintained, and as such the max() in selinux hooks is actually spurious. ie. even though if (snum < max(inet_prot_sock(sock_net(sk)), low) || snum > high) { per logic is the same as if ((snum < inet_prot_sock(sock_net(sk)) && snum < low) || snum > high) { it is actually functionally equivalent to: if (snum < low || snum > high) { which is equivalent to: if (snum < inet_prot_sock(sock_net(sk)) || snum < low || snum > high) { even though the first clause is spurious. But we want to hold on to it in case we ever want to change what what inet_port_requires_bind_service() means (for example by changing it from a, by default, [0..1024) range to some sort of set). Test: builds, git 'grep inet_prot_sock' finds no other references Cc: Eric Dumazet <edumazet@google.com> Signed-off-by: Maciej Żenczykowski <maze@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-11-02Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netDavid S. Miller5-25/+35
The only slightly tricky merge conflict was the netdevsim because the mutex locking fix overlapped a lot of driver reload reorganization. The rest were (relatively) trivial in nature. Signed-off-by: David S. Miller <davem@davemloft.net>
2019-10-28net: Fix various misspellings of "connect"Geert Uytterhoeven1-1/+1
Fix misspellings of "disconnect", "disconnecting", "connections", and "disconnected". Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Acked-by: Kalle Valo <kvalo@codeaurora.org> Acked-by: Simon Horman <horms@verge.net.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-10-24ipvs: move old_secure_tcp into struct netns_ipvsEric Dumazet1-8/+7
syzbot reported the following issue : BUG: KCSAN: data-race in update_defense_level / update_defense_level read to 0xffffffff861a6260 of 4 bytes by task 3006 on cpu 1: update_defense_level+0x621/0xb30 net/netfilter/ipvs/ip_vs_ctl.c:177 defense_work_handler+0x3d/0xd0 net/netfilter/ipvs/ip_vs_ctl.c:225 process_one_work+0x3d4/0x890 kernel/workqueue.c:2269 worker_thread+0xa0/0x800 kernel/workqueue.c:2415 kthread+0x1d4/0x200 drivers/block/aoe/aoecmd.c:1253 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352 write to 0xffffffff861a6260 of 4 bytes by task 7333 on cpu 0: update_defense_level+0xa62/0xb30 net/netfilter/ipvs/ip_vs_ctl.c:205 defense_work_handler+0x3d/0xd0 net/netfilter/ipvs/ip_vs_ctl.c:225 process_one_work+0x3d4/0x890 kernel/workqueue.c:2269 worker_thread+0xa0/0x800 kernel/workqueue.c:2415 kthread+0x1d4/0x200 drivers/block/aoe/aoecmd.c:1253 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 7333 Comm: kworker/0:5 Not tainted 5.4.0-rc3+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events defense_work_handler Indeed, old_secure_tcp is currently a static variable, while it needs to be a per netns variable. Fixes: a0840e2e165a ("IPVS: netns, ip_vs_ctl local vars moved to ipvs struct.") Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: syzbot <syzkaller@googlegroups.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2019-10-24ipvs: don't ignore errors in case refcounting ip_vs module failsDavide Caratti5-17/+28
if the IPVS module is removed while the sync daemon is starting, there is a small gap where try_module_get() might fail getting the refcount inside ip_vs_use_count_inc(). Then, the refcounts of IPVS module are unbalanced, and the subsequent call to stop_sync_thread() causes the following splat: WARNING: CPU: 0 PID: 4013 at kernel/module.c:1146 module_put.part.44+0x15b/0x290 Modules linked in: ip_vs(-) nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 veth ip6table_filter ip6_tables iptable_filter binfmt_misc intel_rapl_msr intel_rapl_common crct10dif_pclmul crc32_pclmul ext4 mbcache jbd2 ghash_clmulni_intel snd_hda_codec_generic ledtrig_audio snd_hda_intel snd_intel_nhlt snd_hda_codec snd_hda_core snd_hwdep snd_seq snd_seq_device snd_pcm aesni_intel crypto_simd cryptd glue_helper joydev pcspkr snd_timer virtio_balloon snd soundcore i2c_piix4 nfsd auth_rpcgss nfs_acl lockd grace sunrpc ip_tables xfs libcrc32c ata_generic pata_acpi virtio_net net_failover virtio_blk failover virtio_console qxl drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops ata_piix ttm crc32c_intel serio_raw drm virtio_pci libata virtio_ring virtio floppy dm_mirror dm_region_hash dm_log dm_mod [last unloaded: nf_defrag_ipv6] CPU: 0 PID: 4013 Comm: modprobe Tainted: G W 5.4.0-rc1.upstream+ #741 Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011 RIP: 0010:module_put.part.44+0x15b/0x290 Code: 04 25 28 00 00 00 0f 85 18 01 00 00 48 83 c4 68 5b 5d 41 5c 41 5d 41 5e 41 5f c3 89 44 24 28 83 e8 01 89 c5 0f 89 57 ff ff ff <0f> 0b e9 78 ff ff ff 65 8b 1d 67 83 26 4a 89 db be 08 00 00 00 48 RSP: 0018:ffff888050607c78 EFLAGS: 00010297 RAX: 0000000000000003 RBX: ffffffffc1420590 RCX: ffffffffb5db0ef9 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffffffc1420590 RBP: 00000000ffffffff R08: fffffbfff82840b3 R09: fffffbfff82840b3 R10: 0000000000000001 R11: fffffbfff82840b2 R12: 1ffff1100a0c0f90 R13: ffffffffc1420200 R14: ffff88804f533300 R15: ffff88804f533ca0 FS: 00007f8ea9720740(0000) GS:ffff888053800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3245abe000 CR3: 000000004c28a006 CR4: 00000000001606f0 Call Trace: stop_sync_thread+0x3a3/0x7c0 [ip_vs] ip_vs_sync_net_cleanup+0x13/0x50 [ip_vs] ops_exit_list.isra.5+0x94/0x140 unregister_pernet_operations+0x29d/0x460 unregister_pernet_device+0x26/0x60 ip_vs_cleanup+0x11/0x38 [ip_vs] __x64_sys_delete_module+0x2d5/0x400 do_syscall_64+0xa5/0x4e0 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f8ea8bf0db7 Code: 73 01 c3 48 8b 0d b9 80 2c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 b0 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 89 80 2c 00 f7 d8 64 89 01 48 RSP: 002b:00007ffcd38d2fe8 EFLAGS: 00000206 ORIG_RAX: 00000000000000b0 RAX: ffffffffffffffda RBX: 0000000002436240 RCX: 00007f8ea8bf0db7 RDX: 0000000000000000 RSI: 0000000000000800 RDI: 00000000024362a8 RBP: 0000000000000000 R08: 00007f8ea8eba060 R09: 00007f8ea8c658a0 R10: 00007ffcd38d2a60 R11: 0000000000000206 R12: 0000000000000000 R13: 0000000000000001 R14: 00000000024362a8 R15: 0000000000000000 irq event stamp: 4538 hardirqs last enabled at (4537): [<ffffffffb6193dde>] quarantine_put+0x9e/0x170 hardirqs last disabled at (4538): [<ffffffffb5a0556a>] trace_hardirqs_off_thunk+0x1a/0x20 softirqs last enabled at (4522): [<ffffffffb6f8ebe9>] sk_common_release+0x169/0x2d0 softirqs last disabled at (4520): [<ffffffffb6f8eb3e>] sk_common_release+0xbe/0x2d0 Check the return value of ip_vs_use_count_inc() and let its caller return proper error. Inside do_ip_vs_set_ctl() the module is already refcounted, we don't need refcount/derefcount there. Finally, in register_ip_vs_app() and start_sync_thread(), take the module refcount earlier and ensure it's released in the error path. Change since v1: - better return values in case of failure of ip_vs_use_count_inc(), thanks to Julian Anastasov - no need to increase/decrease the module refcount in ip_vs_set_ctl(), thanks to Julian Anastasov Signed-off-by: Davide Caratti <dcaratti@redhat.com> Signed-off-by: Julian Anastasov <ja@ssi.bg> Signed-off-by: Simon Horman <horms@verge.net.au>
2019-10-08ipvs: batch __ip_vs_dev_cleanupHaishuang Yan1-7/+12
It's better to batch __ip_vs_cleanup to speedup ipvs devices dismantle. Signed-off-by: Haishuang Yan <yanhaishuang@cmss.chinamobile.com> Acked-by: Julian Anastasov <ja@ssi.bg> Signed-off-by: Simon Horman <horms@verge.net.au>
2019-10-08ipvs: batch __ip_vs_cleanupHaishuang Yan2-15/+25
It's better to batch __ip_vs_cleanup to speedup ipvs connections dismantle. Signed-off-by: Haishuang Yan <yanhaishuang@cmss.chinamobile.com> Acked-by: Julian Anastasov <ja@ssi.bg> Signed-off-by: Simon Horman <horms@verge.net.au>
2019-10-08ipvs: no need to update skb route entry for local destination packets.zhang kai1-12/+6
In the end of function __ip_vs_get_out_rt/__ip_vs_get_out_rt_v6,the 'local' variable is always zero. Signed-off-by: zhang kai <zhangkaiheb@126.com> Acked-by: Julian Anastasov <ja@ssi.bg> Signed-off-by: Simon Horman <horms@verge.net.au>
2019-10-01netfilter: drop bridge nf reset from nf_resetFlorian Westphal1-1/+1
commit 174e23810cd31 ("sk_buff: drop all skb extensions on free and skb scrubbing") made napi recycle always drop skb extensions. The additional skb_ext_del() that is performed via nf_reset on napi skb recycle is not needed anymore. Most nf_reset() calls in the stack are there so queued skb won't block 'rmmod nf_conntrack' indefinitely. This removes the skb_ext_del from nf_reset, and renames it to a more fitting nf_reset_ct(). In a few selected places, add a call to skb_ext_reset to make sure that no active extensions remain. I am submitting this for "net", because we're still early in the release cycle. The patch applies to net-next too, but I think the rename causes needless divergence between those trees. Suggested-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2019-09-26net: Fix Kconfig indentationKrzysztof Kozlowski1-3/+3
Adjust indentation from spaces to tab (+optional two spaces) as in coding style with command like: $ sed -e 's/^ /\t/' -i */Kconfig Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Acked-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-14Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-nextJakub Kicinski4-38/+39
Pablo Neira Ayuso says: ==================== Netfilter/IPVS updates for net-next The following patchset contains Netfilter/IPVS updates for net-next: 1) Rename mss field to mss_option field in synproxy, from Fernando Mancera. 2) Use SYSCTL_{ZERO,ONE} definitions in conntrack, from Matteo Croce. 3) More strict validation of IPVS sysctl values, from Junwei Hu. 4) Remove unnecessary spaces after on the right hand side of assignments, from yangxingwu. 5) Add offload support for bitwise operation. 6) Extend the nft_offload_reg structure to store immediate date. 7) Collapse several ip_set header files into ip_set.h, from Jeremy Sowden. 8) Make netfilter headers compile with CONFIG_KERNEL_HEADER_TEST=y, from Jeremy Sowden. 9) Fix several sparse warnings due to missing prototypes, from Valdis Kletnieks. 10) Use static lock initialiser to ensure connlabel spinlock is initialized on boot time to fix sched/act_ct.c, patch from Florian Westphal. ==================== Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
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