linux/include/net/netns, branch v5.14

Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf

2021-08-06T15:44:50Z

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

netfilter: conntrack: remove offload_pickup sysctl again

2021-08-06T15:07:41Z

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 Cc: Paul Blakey Suggested-by: Marcelo Ricardo Leitner Signed-off-by: Florian Westphal Reviewed-by: Marcelo Ricardo Leitner Reviewed-by: Oz Shlomo Signed-off-by: Pablo Neira Ayuso

Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec

2021-08-04T09:45:41Z

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

netfilter: conntrack: add new sysctl to disable RST check

2021-07-06T12:15:12Z

This patch adds a new sysctl tcp_ignore_invalid_rst to disable marking out of segments RSTs as INVALID. Signed-off-by: Ali Abdallah Acked-by: Florian Westphal Signed-off-by: Pablo Neira Ayuso

xfrm: Fix RCU vs hash_resize_mutex lock inversion

2021-07-02T07:27:55Z

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 Cc: Peter Zijlstra (Intel) Cc: Varad Gautam Cc: Steffen Klassert Cc: Herbert Xu Cc: David S. Miller Signed-off-by: Frederic Weisbecker Signed-off-by: Steffen Klassert

Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git

2021-06-28T20:17:16Z

/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

sctp: add probe_interval in sysctl and sock/asoc/transport

2021-06-22T18:28:51Z

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 Acked-by: Marcelo Ricardo Leitner Signed-off-by: David S. Miller

Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next

2021-06-17T18:54:56Z

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

net/smc: Make SMC statistics network namespace aware

2021-06-16T19:54:02Z

Make the gathered SMC statistics network namespace aware, for each namespace collect an own set of statistic information. Signed-off-by: Guvenc Gulce Signed-off-by: Karsten Graul Signed-off-by: David S. Miller

net: Introduce net.ipv4.tcp_migrate_req.

2021-06-15T16:01:05Z

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 Signed-off-by: Daniel Borkmann Reviewed-by: Benjamin Herrenschmidt Reviewed-by: Eric Dumazet Acked-by: Martin KaFai Lau Link: https://lore.kernel.org/bpf/20210612123224.12525-2-kuniyu@amazon.co.jp