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2021-12-02ipv4: convert fib_num_tclassid_users to atomic_tEric Dumazet
Before commit faa041a40b9f ("ipv4: Create cleanup helper for fib_nh") changes to net->ipv4.fib_num_tclassid_users were protected by RTNL. After the change, this is no longer the case, as free_fib_info_rcu() runs after rcu grace period, without rtnl being held. Fixes: faa041a40b9f ("ipv4: Create cleanup helper for fib_nh") Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: David Ahern <dsahern@kernel.org> Reviewed-by: David Ahern <dsahern@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-09-28netfilter: conntrack: fix boot failure with nf_conntrack.enable_hooks=1Florian Westphal
This is a revert of 7b1957b049 ("netfilter: nf_defrag_ipv4: use net_generic infra") and a partial revert of 8b0adbe3e3 ("netfilter: nf_defrag_ipv6: use net_generic infra"). If conntrack is builtin and kernel is booted with: nf_conntrack.enable_hooks=1 .... kernel will fail to boot due to a NULL deref in nf_defrag_ipv4_enable(): Its called before the ipv4 defrag initcall is made, so net_generic() returns NULL. To resolve this, move the user refcount back to struct net so calls to those functions are possible even before their initcalls have run. Fixes: 7b1957b04956 ("netfilter: nf_defrag_ipv4: use net_generic infra") Fixes: 8b0adbe3e38d ("netfilter: nf_defrag_ipv6: use net_generic infra"). Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2021-08-30Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-nextDavid S. Miller
Pablo Neira Ayuso says: ==================== Netfilter updates for net-next The following patchset contains Netfilter updates for net-next: 1) Clean up and consolidate ct ecache infrastructure by merging ct and expect notifiers, from Florian Westphal. 2) Missing counters and timestamp in nfnetlink_queue and _log conntrack information. 3) Missing error check for xt_register_template() in iptables mangle, as a incremental fix for the previous pull request, also from Florian Westphal. 4) Add netfilter hooks for the SRv6 lightweigh tunnel driver, from Ryoga Sato. The hooks are enabled via nf_hooks_lwtunnel sysctl to make sure existing netfilter rulesets do not break. There is a static key to disable the hooks by default. The pktgen_bench_xmit_mode_netif_receive.sh shows no noticeable impact in the seg6_input path for non-netfilter users: similar numbers with and without this patch. This is a sample of the perf report output: 11.67% kpktgend_0 [ipv6] [k] ipv6_get_saddr_eval 7.89% kpktgend_0 [ipv6] [k] __ipv6_addr_label 7.52% kpktgend_0 [ipv6] [k] __ipv6_dev_get_saddr 6.63% kpktgend_0 [kernel.vmlinux] [k] asm_exc_nmi 4.74% kpktgend_0 [ipv6] [k] fib6_node_lookup_1 3.48% kpktgend_0 [kernel.vmlinux] [k] pskb_expand_head 3.33% kpktgend_0 [ipv6] [k] ip6_rcv_core.isra.29 3.33% kpktgend_0 [ipv6] [k] seg6_do_srh_encap 2.53% kpktgend_0 [ipv6] [k] ipv6_dev_get_saddr 2.45% kpktgend_0 [ipv6] [k] fib6_table_lookup 2.24% kpktgend_0 [kernel.vmlinux] [k] ___cache_free 2.16% kpktgend_0 [ipv6] [k] ip6_pol_route 2.11% kpktgend_0 [kernel.vmlinux] [k] __ipv6_addr_type ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2021-08-27Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/David S. Miller
ipsec-next Steffen Klassert says: ==================== pull request (net-next): ipsec-next 2021-08-27 1) Remove an unneeded extra variable in esp4 esp_ssg_unref. From Corey Minyard. 2) Add a configuration option to change the default behaviour to block traffic if there is no matching policy. Joint work with Christian Langrock and Antony Antony. 3) Fix a shift-out-of-bounce bug reported from syzbot. From Pavel Skripkin. Please pull or let me know if there are problems. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2021-08-25netfilter: ecache: remove nf_exp_event_notifier structureFlorian Westphal
Reuse the conntrack event notofier struct, this allows to remove the extra register/unregister functions and avoids a pointer in struct net. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2021-08-13Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski
Conflicts: drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h 9e26680733d5 ("bnxt_en: Update firmware call to retrieve TX PTP timestamp") 9e518f25802c ("bnxt_en: 1PPS functions to configure TSIO pins") 099fdeda659d ("bnxt_en: Event handler for PPS events") kernel/bpf/helpers.c include/linux/bpf-cgroup.h a2baf4e8bb0f ("bpf: Fix potentially incorrect results with bpf_get_local_storage()") c7603cfa04e7 ("bpf: Add ambient BPF runtime context stored in current") drivers/net/ethernet/mellanox/mlx5/core/pci_irq.c 5957cc557dc5 ("net/mlx5: Set all field of mlx5_irq before inserting it to the xarray") 2d0b41a37679 ("net/mlx5: Refcount mlx5_irq with integer") MAINTAINERS 7b637cd52f02 ("MAINTAINERS: fix Microchip CAN BUS Analyzer Tool entry typo") 7d901a1e878a ("net: phy: add Maxlinear GPY115/21x/24x driver") Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-08-11Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-nextDavid S. Miller
Pablo Neira Ayuso says: ==================== Netfilter updates for net-next The following patchset contains Netfilter updates for net-next: 1) Use nfnetlink_unicast() instead of netlink_unicast() in nft_compat. 2) Remove call to nf_ct_l4proto_find() in flowtable offload timeout fixup. 3) CLUSTERIP registers ARP hook on demand, from Florian. 4) Use clusterip_net to store pernet warning, also from Florian. 5) Remove struct netns_xt, from Florian Westphal. 6) Enable ebtables hooks in initns on demand, from Florian. 7) Allow to filter conntrack netlink dump per status bits, from Florian Westphal. 8) Register x_tables hooks in initns on demand, from Florian. 9) Remove queue_handler from per-netns structure, again from Florian. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2021-08-10netfilter: nf_queue: move hookfn registration out of struct netFlorian Westphal
This was done to detect when the pernet->init() function was not called yet, by checking if net->nf.queue_handler is NULL. Once the nfnetlink_queue module is active, all struct net pointers contain the same address. So place this back in nf_queue.c. Handle the 'netns error unwind' test by checking nfnl_queue_net for a NULL pointer and add a comment for this. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2021-08-06Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nfJakub Kicinski
Pablo Neira Ayuso says: ==================== Netfilter fixes for net The following patchset contains Netfilter fixes for net: 1) Restrict range element expansion in ipset to avoid soft lockup, from Jozsef Kadlecsik. 2) Memleak in error path for nf_conntrack_bridge for IPv4 packets, from Yajun Deng. 3) Simplify conntrack garbage collection strategy to avoid frequent wake-ups, from Florian Westphal. 4) Fix NFNLA_HOOK_FUNCTION_NAME string, do not include module name. 5) Missing chain family netlink attribute in chain description in nfnetlink_hook. 6) Incorrect sequence number on nfnetlink_hook dumps. 7) Use netlink request family in reply message for consistency. 8) Remove offload_pickup sysctl, use conntrack for established state instead, from Florian Westphal. 9) Translate NFPROTO_INET/ingress to NFPROTO_NETDEV/ingress, since NFPROTO_INET is not exposed through nfnetlink_hook. * git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf: netfilter: nfnetlink_hook: translate inet ingress to netdev netfilter: conntrack: remove offload_pickup sysctl again netfilter: nfnetlink_hook: Use same family as request message netfilter: nfnetlink_hook: use the sequence number of the request message netfilter: nfnetlink_hook: missing chain family netfilter: nfnetlink_hook: strip off module name from hookfn netfilter: conntrack: collect all entries in one cycle netfilter: nf_conntrack_bridge: Fix memory leak when error netfilter: ipset: Limit the maximal range of consecutive elements to add/delete ==================== Link: https://lore.kernel.org/r/20210806151149.6356-1-pablo@netfilter.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-08-06netfilter: conntrack: remove offload_pickup sysctl againFlorian Westphal
These two sysctls were added because the hardcoded defaults (2 minutes, tcp, 30 seconds, udp) turned out to be too low for some setups. They appeared in 5.14-rc1 so it should be fine to remove it again. Marcelo convinced me that there should be no difference between a flow that was offloaded vs. a flow that was not wrt. timeout handling. Thus the default is changed to those for TCP established and UDP stream, 5 days and 120 seconds, respectively. Marcelo also suggested to account for the timeout value used for the offloading, this avoids increase beyond the value in the conntrack-sysctl and will also instantly expire the conntrack entry with altered sysctls. Example: nf_conntrack_udp_timeout_stream=60 nf_flowtable_udp_timeout=60 This will remove offloaded udp flows after one minute, rather than two. An earlier version of this patch also cleared the ASSURED bit to allow nf_conntrack to evict the entry via early_drop (i.e., table full). However, it looks like we can safely assume that connection timed out via HW is still in established state, so this isn't needed. Quoting Oz: [..] the hardware sends all packets with a set FIN flags to sw. [..] Connections that are aged in hardware are expected to be in the established state. In case it turns out that back-to-sw-path transition can occur for 'dodgy' connections too (e.g., one side disappeared while software-path would have been in RETRANS timeout), we can adjust this later. Cc: Oz Shlomo <ozsh@nvidia.com> Cc: Paul Blakey <paulb@nvidia.com> Suggested-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: Florian Westphal <fw@strlen.de> Reviewed-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Reviewed-by: Oz Shlomo <ozsh@nvidia.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2021-08-05Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski
Build failure in drivers/net/wwan/mhi_wwan_mbim.c: add missing parameter (0, assuming we don't want buffer pre-alloc). Conflict in drivers/net/dsa/sja1105/sja1105_main.c between: 589918df9322 ("net: dsa: sja1105: be stateless with FDB entries on SJA1105P/Q/R/S/SJA1110 too") 0fac6aa098ed ("net: dsa: sja1105: delete the best_effort_vlan_filtering mode") Follow the instructions from the commit message of the former commit - removed the if conditions. When looking at commit 589918df9322 ("net: dsa: sja1105: be stateless with FDB entries on SJA1105P/Q/R/S/SJA1110 too") note that the mask_iotag fields get removed by the following patch. Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-08-04Merge branch 'master' of ↵David S. Miller
git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec Steffen Klassert says: ==================== pull request (net): ipsec 2021-08-04 1) Fix a sysbot reported memory leak in xfrm_user_rcv_msg. From Pavel Skripkin. 2) Revert "xfrm: policy: Read seqcount outside of rcu-read side in xfrm_policy_lookup_bytype". This commit tried to fix a lockin bug, but only cured some of the symptoms. A proper fix is applied on top of this revert. 3) Fix a locking bug on xfrm state hash resize. A recent change on sequence counters accidentally repaced a spinlock by a mutex. Fix from Frederic Weisbecker. 4) Fix possible user-memory-access in xfrm_user_rcv_msg_compat(). From Dmitry Safonov. 5) Add initialiation sefltest fot xfrm_spdattr_type_t. From Dmitry Safonov. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2021-08-01netfilter: remove xt pernet dataFlorian Westphal
clusterip is now handled via net_generic. NOTRACK is tiny compared to rest of xt_CT feature set, even the existing deprecation warning is bigger than the actual functionality. Just remove the warning, its not worth keeping/adding a net_generic one. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2021-07-29mctp: Allow per-netns default networksMatt Johnston
Currently we have a compile-time default network (MCTP_INITIAL_DEFAULT_NET). This change introduces a default_net field on the net namespace, allowing future configuration for new interfaces. Signed-off-by: Matt Johnston <matt@codeconstruct.com.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-07-29mctp: Populate socket implementationJeremy Kerr
Start filling-out the socket syscalls: bind, sendmsg & recvmsg. This requires an input route implementation, so we add to mctp_route_input, allowing lookups on binds & message tags. This just handles single-packet messages at present, we will add fragmentation in a future change. Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-07-29mctp: Add neighbour implementationMatt Johnston
Add an initial neighbour table implementation, to be used in the route output path. Signed-off-by: Matt Johnston <matt@codeconstruct.com.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-07-29mctp: Add initial routing frameworkJeremy Kerr
Add a simple routing table, and a couple of route output handlers, and the mctp packet_type & handler. Includes changes from Matt Johnston <matt@codeconstruct.com.au>. Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-07-21ipv6: ioam: Data plane support for Pre-allocated TraceJustin Iurman
Implement support for processing the IOAM Pre-allocated Trace with IPv6, see [1] and [2]. Introduce a new IPv6 Hop-by-Hop TLV option, see IANA [3]. A new per-interface sysctl is introduced. The value is a boolean to accept (=1) or ignore (=0, by default) IPv6 IOAM options on ingress for an interface: - net.ipv6.conf.XXX.ioam6_enabled Two other sysctls are introduced to define IOAM IDs, represented by an integer. They are respectively per-namespace and per-interface: - net.ipv6.ioam6_id - net.ipv6.conf.XXX.ioam6_id The value of the first one represents the IOAM ID of the node itself (u32; max and default value = U32_MAX>>8, due to hop limit concatenation) while the other represents the IOAM ID of an interface (u16; max and default value = U16_MAX). Each "ioam6_id" sysctl has a "_wide" equivalent: - net.ipv6.ioam6_id_wide - net.ipv6.conf.XXX.ioam6_id_wide The value of the first one represents the wide IOAM ID of the node itself (u64; max and default value = U64_MAX>>8, due to hop limit concatenation) while the other represents the wide IOAM ID of an interface (u32; max and default value = U32_MAX). The use of short and wide equivalents is not exclusive, a deployment could choose to leverage both. For example, net.ipv6.conf.XXX.ioam6_id (short format) could be an identifier for a physical interface, whereas net.ipv6.conf.XXX.ioam6_id_wide (wide format) could be an identifier for a logical sub-interface. Documentation about new sysctls is provided at the end of this patchset. Two relativistic hash tables are used: one for IOAM namespaces, the other for IOAM schemas. A namespace can only have a single active schema and a schema can only be attached to a single namespace (1:1 relationship). [1] https://tools.ietf.org/html/draft-ietf-ippm-ioam-ipv6-options [2] https://tools.ietf.org/html/draft-ietf-ippm-ioam-data [3] https://www.iana.org/assignments/ipv6-parameters/ipv6-parameters.xhtml#ipv6-parameters-2 Signed-off-by: Justin Iurman <justin.iurman@uliege.be> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-07-21xfrm: Add possibility to set the default to block if we have no policySteffen Klassert
As the default we assume the traffic to pass, if we have no matching IPsec policy. With this patch, we have a possibility to change this default from allow to block. It can be configured via netlink. Each direction (input/output/forward) can be configured separately. With the default to block configuered, we need allow policies for all packet flows we accept. We do not use default policy lookup for the loopback device. v1->v2 - fix compiling when XFRM is disabled - Reported-by: kernel test robot <lkp@intel.com> Co-developed-by: Christian Langrock <christian.langrock@secunet.com> Signed-off-by: Christian Langrock <christian.langrock@secunet.com> Co-developed-by: Antony Antony <antony.antony@secunet.com> Signed-off-by: Antony Antony <antony.antony@secunet.com> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2021-07-20net/tcp_fastopen: remove tcp_fastopen_ctx_lockEric Dumazet
Remove the (per netns) spinlock in favor of xchg() atomic operations. Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Yuchung Cheng <ycheng@google.com> Cc: Neal Cardwell <ncardwell@google.com> Acked-by: Wei Wang <weiwan@google.com> Link: https://lore.kernel.org/r/20210719101107.3203943-1-eric.dumazet@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-07-06netfilter: conntrack: add new sysctl to disable RST checkAli Abdallah
This patch adds a new sysctl tcp_ignore_invalid_rst to disable marking out of segments RSTs as INVALID. Signed-off-by: Ali Abdallah <aabdallah@suse.de> Acked-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2021-07-02xfrm: Fix RCU vs hash_resize_mutex lock inversionFrederic Weisbecker
xfrm_bydst_resize() calls synchronize_rcu() while holding hash_resize_mutex. But then on PREEMPT_RT configurations, xfrm_policy_lookup_bytype() may acquire that mutex while running in an RCU read side critical section. This results in a deadlock. In fact the scope of hash_resize_mutex is way beyond the purpose of xfrm_policy_lookup_bytype() to just fetch a coherent and stable policy for a given destination/direction, along with other details. The lower level net->xfrm.xfrm_policy_lock, which among other things protects per destination/direction references to policy entries, is enough to serialize and benefit from priority inheritance against the write side. As a bonus, it makes it officially a per network namespace synchronization business where a policy table resize on namespace A shouldn't block a policy lookup on namespace B. Fixes: 77cc278f7b20 (xfrm: policy: Use sequence counters with associated lock) Cc: stable@vger.kernel.org Cc: Ahmed S. Darwish <a.darwish@linutronix.de> Cc: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Varad Gautam <varad.gautam@suse.com> Cc: Steffen Klassert <steffen.klassert@secunet.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Frederic Weisbecker <frederic@kernel.org> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2021-06-28Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/gitDavid S. Miller
/klassert/ipsec-next Steffen Klassert says: ==================== pull request (net-next): ipsec-next 2021-06-28 1) Remove an unneeded error assignment in esp4_gro_receive(). From Yang Li. 2) Add a new byseq state hashtable to find acquire states faster. From Sabrina Dubroca. 3) Remove some unnecessary variables in pfkey_create(). From zuoqilin. 4) Remove the unused description from xfrm_type struct. From Florian Westphal. 5) Fix a spelling mistake in the comment of xfrm_state_ok(). From gushengxian. 6) Replace hdr_off indirections by a small helper function. From Florian Westphal. 7) Remove xfrm4_output_finish and xfrm6_output_finish declarations, they are not used anymore.From Antony Antony. 8) Remove xfrm replay indirections. From Florian Westphal. Please pull or let me know if there are problems. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-22sctp: add probe_interval in sysctl and sock/asoc/transportXin Long
PLPMTUD can be enabled by doing 'sysctl -w net.sctp.probe_interval=n'. 'n' is the interval for PLPMTUD probe timer in milliseconds, and it can't be less than 5000 if it's not 0. All asoc/transport's PLPMTUD in a new socket will be enabled by default. Signed-off-by: Xin Long <lucien.xin@gmail.com> Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-17Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-nextDavid S. Miller
Daniel Borkmann says: ==================== pull-request: bpf-next 2021-06-17 The following pull-request contains BPF updates for your *net-next* tree. We've added 50 non-merge commits during the last 25 day(s) which contain a total of 148 files changed, 4779 insertions(+), 1248 deletions(-). The main changes are: 1) BPF infrastructure to migrate TCP child sockets from a listener to another in the same reuseport group/map, from Kuniyuki Iwashima. 2) Add a provably sound, faster and more precise algorithm for tnum_mul() as noted in https://arxiv.org/abs/2105.05398, from Harishankar Vishwanathan. 3) Streamline error reporting changes in libbpf as planned out in the 'libbpf: the road to v1.0' effort, from Andrii Nakryiko. 4) Add broadcast support to xdp_redirect_map(), from Hangbin Liu. 5) Extends bpf_map_lookup_and_delete_elem() functionality to 4 more map types, that is, {LRU_,PERCPU_,LRU_PERCPU_,}HASH, from Denis Salopek. 6) Support new LLVM relocations in libbpf to make them more linker friendly, also add a doc to describe the BPF backend relocations, from Yonghong Song. 7) Silence long standing KUBSAN complaints on register-based shifts in interpreter, from Daniel Borkmann and Eric Biggers. 8) Add dummy PT_REGS macros in libbpf to fail BPF program compilation when target arch cannot be determined, from Lorenz Bauer. 9) Extend AF_XDP to support large umems with 1M+ pages, from Magnus Karlsson. 10) Fix two minor libbpf tc BPF API issues, from Kumar Kartikeya Dwivedi. 11) Move libbpf BPF_SEQ_PRINTF/BPF_SNPRINTF macros that can be used by BPF programs to bpf_helpers.h header, from Florent Revest. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-16net/smc: Make SMC statistics network namespace awareGuvenc Gulce
Make the gathered SMC statistics network namespace aware, for each namespace collect an own set of statistic information. Signed-off-by: Guvenc Gulce <guvenc@linux.ibm.com> Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-15net: Introduce net.ipv4.tcp_migrate_req.Kuniyuki Iwashima
This commit adds a new sysctl option: net.ipv4.tcp_migrate_req. If this option is enabled or eBPF program is attached, we will be able to migrate child sockets from a listener to another in the same reuseport group after close() or shutdown() syscalls. Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.co.jp> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Reviewed-by: Benjamin Herrenschmidt <benh@amazon.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Acked-by: Martin KaFai Lau <kafai@fb.com> Link: https://lore.kernel.org/bpf/20210612123224.12525-2-kuniyu@amazon.co.jp
2021-06-07netfilter: conntrack: Introduce udp offload timeout configurationOz Shlomo
UDP connections may be offloaded from nf conntrack to nf flow table. Offloaded connections are aged after 30 seconds of inactivity. Once aged, ownership is returned to conntrack with a hard coded pickup time of 30 seconds, after which the connection may be deleted. eted. The current aging intervals may be too aggressive for some users. Provide users with the ability to control the nf flow table offload aging and pickup time intervals via sysctl parameter as a pre-step for configuring the nf flow table GC timeout intervals. Signed-off-by: Oz Shlomo <ozsh@nvidia.com> Reviewed-by: Paul Blakey <paulb@nvidia.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2021-06-07netfilter: conntrack: Introduce tcp offload timeout configurationOz Shlomo
TCP connections may be offloaded from nf conntrack to nf flow table. Offloaded connections are aged after 30 seconds of inactivity. Once aged, ownership is returned to conntrack with a hard coded pickup time of 120 seconds, after which the connection may be deleted. eted. The current aging intervals may be too aggressive for some users. Provide users with the ability to control the nf flow table offload aging and pickup time intervals via sysctl parameter as a pre-step for configuring the nf flow table GC timeout intervals. Signed-off-by: Oz Shlomo <ozsh@nvidia.com> Reviewed-by: Paul Blakey <paulb@nvidia.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2021-05-18ipv6: Add a sysctl to control multipath hash fieldsIdo Schimmel
A subsequent patch will add a new multipath hash policy where the packet fields used for multipath hash calculation are determined by user space. This patch adds a sysctl that allows user space to set these fields. The packet fields are represented using a bitmask and are common between IPv4 and IPv6 to allow user space to use the same numbering across both protocols. For example, to hash based on standard 5-tuple: # sysctl -w net.ipv6.fib_multipath_hash_fields=0x0037 net.ipv6.fib_multipath_hash_fields = 0x0037 To avoid introducing holes in 'struct netns_sysctl_ipv6', move the 'bindv6only' field after the multipath hash fields. The kernel rejects unknown fields, for example: # sysctl -w net.ipv6.fib_multipath_hash_fields=0x1000 sysctl: setting key "net.ipv6.fib_multipath_hash_fields": Invalid argument Signed-off-by: Ido Schimmel <idosch@nvidia.com> Reviewed-by: David Ahern <dsahern@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-05-18ipv4: Add a sysctl to control multipath hash fieldsIdo Schimmel
A subsequent patch will add a new multipath hash policy where the packet fields used for multipath hash calculation are determined by user space. This patch adds a sysctl that allows user space to set these fields. The packet fields are represented using a bitmask and are common between IPv4 and IPv6 to allow user space to use the same numbering across both protocols. For example, to hash based on standard 5-tuple: # sysctl -w net.ipv4.fib_multipath_hash_fields=0x0037 net.ipv4.fib_multipath_hash_fields = 0x0037 The kernel rejects unknown fields, for example: # sysctl -w net.ipv4.fib_multipath_hash_fields=0x1000 sysctl: setting key "net.ipv4.fib_multipath_hash_fields": Invalid argument More fields can be added in the future, if needed. Signed-off-by: Ido Schimmel <idosch@nvidia.com> Reviewed-by: David Ahern <dsahern@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-05-14xfrm: add state hashtable keyed by seqSabrina Dubroca
When creating new states with seq set in xfrm_usersa_info, we walk through all the states already installed in that netns to find a matching ACQUIRE state (__xfrm_find_acq_byseq, called from xfrm_state_add). This causes severe slowdowns on systems with a large number of states. This patch introduces a hashtable using x->km.seq as key, so that the corresponding state can be found in a reasonable time. Signed-off-by: Sabrina Dubroca <sd@queasysnail.net> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2021-04-26netfilter: remove all xt_table anchors from struct netFlorian Westphal
No longer needed, table pointer arg is now passed via netfilter core. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2021-04-26netfilter: ebtables: remove the 3 ebtables pointers from struct netFlorian Westphal
ebtables stores the table internal data (what gets passed to the ebt_do_table() interpreter) in struct net. nftables keeps the internal interpreter format in pernet lists and passes it via the netfilter core infrastructure (priv pointer). Do the same for ebtables: the nf_hook_ops are duplicated via kmemdup, then the ops->priv pointer is set to the table that is being registered. After that, the netfilter core passes this table info to the hookfn. This allows to remove the pointers from struct net. Same pattern can be applied to ip/ip6/arptables. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2021-04-13netfilter: conntrack: convert sysctls to u8Florian Westphal
log_invalid sysctl allows values of 0 to 255 inclusive so we no longer need a range check: the min/max values can be removed. This also removes all member variables that were moved to net_generic data in previous patches. This reduces size of netns_ct struct by one cache line. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2021-04-09Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski
Conflicts: MAINTAINERS - keep Chandrasekar drivers/net/ethernet/mellanox/mlx5/core/en_main.c - simple fix + trust the code re-added to param.c in -next is fine include/linux/bpf.h - trivial include/linux/ethtool.h - trivial, fix kdoc while at it include/linux/skmsg.h - move to relevant place in tcp.c, comment re-wrapped net/core/skmsg.c - add the sk = sk // sk = NULL around calls net/tipc/crypto.c - trivial Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-04-09net: dccp: use net_generic storageFlorian Westphal
DCCP is virtually never used, so no need to use space in struct net for it. Put the pernet ipv4/v6 socket in the dccp ipv4/ipv6 modules instead. Signed-off-by: Florian Westphal <fw@strlen.de> Link: https://lore.kernel.org/r/20210408174502.1625-1-fw@strlen.de Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-04-06Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-nextDavid S. Miller
Pablo Neira Ayuso says: ==================== Netfilter updates for net-next The following batch contains Netfilter/IPVS updates for your net-next tree: 1) Simplify log infrastructure modularity: Merge ipv4, ipv6, bridge, netdev and ARP families to nf_log_syslog.c. Add module softdeps. This fixes a rare deadlock condition that might occur when log module autoload is required. From Florian Westphal. 2) Moves part of netfilter related pernet data from struct net to net_generic() infrastructure. All of these users can be modules, so if they are not loaded there is no need to waste space. Size reduction is 7 cachelines on x86_64, also from Florian. 2) Update nftables audit support to report events once per table, to get it aligned with iptables. From Richard Guy Briggs. 3) Check for stale routes from the flowtable garbage collector path. This is fixing IPv6 which breaks due missing check for the dst_cookie. 4) Add a nfnl_fill_hdr() function to simplify netlink + nfnetlink headers setup. 5) Remove documentation on several statified functions. 6) Remove printk on netns creation for the FTP IPVS tracker, from Florian Westphal. 7) Remove unnecessary nf_tables_destroy_list_lock spinlock initialization, from Yang Yingliang. 7) Remove a duplicated forward declaration in ipset, from Wan Jiabing. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2021-04-06net: remove obsolete members from struct netFlorian Westphal
all have been moved to generic_net infra. On x86_64, this reduces struct net size from 70 to 63 cache lines (4480 to 4032 byte). Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2021-04-02net: reorganize fields in netns_mibEric Dumazet
Order fields to increase locality for most used protocols. udplite and icmp are moved at the end. Same for proc_net_devsnmp6 which is not used in fast path. This potentially saves one cache line miss for typical TCP/UDP over IPv4/IPv6. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-03-31ipv6: move ip6_dst_ops first in netns_ipv6Eric Dumazet
ip6_dst_ops have cache line alignement. Moving it at beginning of netns_ipv6 removes a 48 byte hole, and shrinks netns_ipv6 from 12 to 11 cache lines. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-03-31ipv6: convert elligible sysctls to u8Eric Dumazet
Convert most sysctls that can fit in a byte. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-03-31tcp: convert tcp_comp_sack_nr sysctl to u8Eric Dumazet
tcp_comp_sack_nr max value was already 255. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-03-31ipv4: convert igmp_link_local_mcast_reports sysctl to u8Eric Dumazet
This sysctl is a bool, can use less storage. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-03-31ipv4: convert fib_multipath_{use_neigh|hash_policy} sysctls to u8Eric Dumazet
Make room for better packing of netns_ipv4 Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-03-31ipv4: convert udp_l3mdev_accept sysctl to u8Eric Dumazet
Reduce footprint of sysctls. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-03-31ipv4: convert fib_notify_on_flag_change sysctl to u8Eric Dumazet
Reduce footprint of sysctls. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-03-31inet: shrink netns_ipv4 by another cache lineEric Dumazet
By shuffling around some fields to remove 8 bytes of hole, we can save one cache line. pahole result before/after the patch : /* size: 768, cachelines: 12, members: 139 */ /* sum members: 673, holes: 11, sum holes: 39 */ /* padding: 56 */ /* paddings: 2, sum paddings: 7 */ /* forced alignments: 1 */ -> /* size: 704, cachelines: 11, members: 139 */ /* sum members: 673, holes: 10, sum holes: 31 */ /* paddings: 2, sum paddings: 7 */ /* forced alignments: 1 */ Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-03-31inet: shrink inet_timewait_death_row by 48 bytesEric Dumazet
struct inet_timewait_death_row uses two cache lines, because we want tw_count to use a full cache line to avoid false sharing. Rework its definition and placement in netns_ipv4 so that: 1) We add 60 bytes of padding after tw_count to avoid false sharing, knowing that tcp_death_row will have ____cacheline_aligned_in_smp attribute. 2) We do not risk padding before tcp_death_row, because we move it at the beginning of netns_ipv4, even if new fields are added later. 3) We do not waste 48 bytes of padding after it. Note that I have not changed dccp. pahole result for struct netns_ipv4 before/after the patch : /* size: 832, cachelines: 13, members: 139 */ /* sum members: 721, holes: 12, sum holes: 95 */ /* padding: 16 */ /* paddings: 2, sum paddings: 55 */ -> /* size: 768, cachelines: 12, members: 139 */ /* sum members: 673, holes: 11, sum holes: 39 */ /* padding: 56 */ /* paddings: 2, sum paddings: 7 */ /* forced alignments: 1 */ Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2021-03-30net: add sysctl for enabling RFC 8335 PROBE messagesAndreas Roeseler
Section 8 of RFC 8335 specifies potential security concerns of responding to PROBE requests, and states that nodes that support PROBE functionality MUST be able to enable/disable responses and that responses MUST be disabled by default Signed-off-by: Andreas Roeseler <andreas.a.roeseler@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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