linux/net/ipv4
Daniel Borkmann 604326b41a bpf, sockmap: convert to generic sk_msg interface
Add a generic sk_msg layer, and convert current sockmap and later
kTLS over to make use of it. While sk_buff handles network packet
representation from netdevice up to socket, sk_msg handles data
representation from application to socket layer.

This means that sk_msg framework spans across ULP users in the
kernel, and enables features such as introspection or filtering
of data with the help of BPF programs that operate on this data
structure.

Latter becomes in particular useful for kTLS where data encryption
is deferred into the kernel, and as such enabling the kernel to
perform L7 introspection and policy based on BPF for TLS connections
where the record is being encrypted after BPF has run and came to
a verdict. In order to get there, first step is to transform open
coding of scatter-gather list handling into a common core framework
that subsystems can use.

The code itself has been split and refactored into three bigger
pieces: i) the generic sk_msg API which deals with managing the
scatter gather ring, providing helpers for walking and mangling,
transferring application data from user space into it, and preparing
it for BPF pre/post-processing, ii) the plain sock map itself
where sockets can be attached to or detached from; these bits
are independent of i) which can now be used also without sock
map, and iii) the integration with plain TCP as one protocol
to be used for processing L7 application data (later this could
e.g. also be extended to other protocols like UDP). The semantics
are the same with the old sock map code and therefore no change
of user facing behavior or APIs. While pursuing this work it
also helped finding a number of bugs in the old sockmap code
that we've fixed already in earlier commits. The test_sockmap
kselftest suite passes through fine as well.

Joint work with John.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2018-10-15 12:23:19 -07:00
..
bpfilter bpfilter: remove trailing newline 2018-07-24 14:10:42 -07:00
netfilter Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next 2018-10-08 21:28:55 -07:00
af_inet.c gso_segment: Reset skb->mac_len after modifying network header 2018-09-13 12:09:32 -07:00
ah4.c net-ipv4: remove 2 always zero parameters from ipv4_redirect() 2018-09-26 20:30:55 -07:00
arp.c
cipso_ipv4.c net/ipv4: defensive cipso option parsing 2018-09-17 19:37:46 -07:00
datagram.c ipv4: Allow sending multicast packets on specific i/f using VRF socket 2018-10-02 22:28:17 -07:00
devinet.c net: Update netconf dump handlers for strict data checking 2018-10-08 10:39:05 -07:00
esp4_offload.c Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next 2018-07-27 09:33:37 -07:00
esp4.c Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next 2018-10-01 22:31:17 -07:00
fib_frontend.c rtnetlink: Update fib dumps for strict data checking 2018-10-08 10:39:05 -07:00
fib_lookup.h
fib_notifier.c
fib_rules.c
fib_semantics.c net: Move free of fib_metrics to helper 2018-10-04 21:54:10 -07:00
fib_trie.c
fou.c
gre_demux.c ip_gre: fix parsing gre header in ipgre_err 2018-09-16 15:32:59 -07:00
gre_offload.c
icmp.c net-ipv4: remove 2 always zero parameters from ipv4_redirect() 2018-09-26 20:30:55 -07:00
igmp.c igmp: fix incorrect unsolicit report count after link down and up 2018-09-02 13:39:37 -07:00
inet_connection_sock.c inet: make sure to grab rcu_read_lock before using ireq->ireq_opt 2018-10-02 15:52:12 -07:00
inet_diag.c
inet_fragment.c ip: process in-order fragments efficiently 2018-08-11 17:54:18 -07:00
inet_hashtables.c bpf: Enable BPF_PROG_TYPE_SK_REUSEPORT bpf prog in reuseport selection 2018-08-11 01:58:46 +02:00
inet_timewait_sock.c
inetpeer.c
ip_forward.c net: ipv4: Control SKB reprioritization after forwarding 2018-08-01 09:52:30 -07:00
ip_fragment.c net/ipfrag: let ip[6]frag_high_thresh in ns be higher than in init_net 2018-09-21 19:45:52 -07:00
ip_gre.c net-ipv4: remove 2 always zero parameters from ipv4_redirect() 2018-09-26 20:30:55 -07:00
ip_input.c net: Add and use skb_list_del_init(). 2018-09-10 10:06:54 -07:00
ip_options.c
ip_output.c net: Add and use skb_mark_not_on_list(). 2018-09-10 10:06:54 -07:00
ip_sockglue.c ipv4: fix use-after-free in ip_cmsg_recv_dstaddr() 2018-10-02 22:32:05 -07:00
ip_tunnel_core.c
ip_tunnel.c ip_tunnel: be careful when accessing the inner header 2018-09-24 12:27:04 -07:00
ip_vti.c net-ipv4: remove 2 always zero parameters from ipv4_redirect() 2018-09-26 20:30:55 -07:00
ipcomp.c net-ipv4: remove 2 always zero parameters from ipv4_redirect() 2018-09-26 20:30:55 -07:00
ipconfig.c
ipip.c net-ipv4: remove 2 always zero parameters from ipv4_redirect() 2018-09-26 20:30:55 -07:00
ipmr_base.c
ipmr.c rtnetlink: Update fib dumps for strict data checking 2018-10-08 10:39:05 -07:00
Kconfig net: remove blank lines at end of file 2018-07-24 14:10:43 -07:00
Makefile bpf, sockmap: convert to generic sk_msg interface 2018-10-15 12:23:19 -07:00
metrics.c net: common metrics init helper for FIB entries 2018-10-04 21:54:03 -07:00
netfilter.c netfilter: utils: move nf_ip_checksum* from ipv4 to utils 2018-07-16 17:51:48 +02:00
netlink.c
ping.c ipv4: Allow sending multicast packets on specific i/f using VRF socket 2018-10-02 22:28:17 -07:00
proc.c ip: discard IPv4 datagrams with overlapping segments. 2018-08-05 17:16:46 -07:00
protocol.c
raw_diag.c
raw.c ipv4: Allow sending multicast packets on specific i/f using VRF socket 2018-10-02 22:28:17 -07:00
route.c net: Move free of dst_metrics to helper 2018-10-04 21:54:25 -07:00
syncookies.c tcp: provide earliest departure time in skb->tstamp 2018-09-21 19:37:59 -07:00
sysctl_net_ipv4.c net-tcp: /proc/sys/net/ipv4/tcp_probe_interval is a u32 not int 2018-09-26 20:33:21 -07:00
tcp_bbr.c tcp: switch tcp and sch_fq to new earliest departure time model 2018-09-21 19:38:00 -07:00
tcp_bic.c
tcp_bpf.c bpf, sockmap: convert to generic sk_msg interface 2018-10-15 12:23:19 -07:00
tcp_cdg.c
tcp_cong.c
tcp_cubic.c
tcp_dctcp.c tcp: avoid resetting ACK timer in DCTCP 2018-08-11 11:31:35 -07:00
tcp_diag.c
tcp_fastopen.c
tcp_highspeed.c
tcp_htcp.c
tcp_hybla.c
tcp_illinois.c
tcp_input.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-10-03 21:00:17 -07:00
tcp_ipv4.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-10-03 21:00:17 -07:00
tcp_lp.c
tcp_metrics.c
tcp_minisocks.c tcp: do not restart timewait timer on rst reception 2018-08-31 23:10:35 -07:00
tcp_nv.c
tcp_offload.c
tcp_output.c tcp: up initial rmem to 128KB and SYN rwin to around 64KB 2018-09-29 11:22:22 -07:00
tcp_rate.c tcp: introduce tcp_skb_timestamp_us() helper 2018-09-21 19:37:59 -07:00
tcp_recovery.c tcp: introduce tcp_skb_timestamp_us() helper 2018-09-21 19:37:59 -07:00
tcp_scalable.c
tcp_timer.c tcp/fq: move back to CLOCK_MONOTONIC 2018-10-01 23:18:51 -07:00
tcp_ulp.c tcp, ulp: remove ulp bits from sockmap 2018-10-15 12:23:19 -07:00
tcp_vegas.c
tcp_vegas.h
tcp_veno.c
tcp_westwood.c
tcp_yeah.c
tcp.c tcp: do not release socket ownership in tcp_close() 2018-10-02 22:17:35 -07:00
tunnel4.c
udp_diag.c
udp_impl.h
udp_offload.c udp: gro behind static key 2018-10-05 11:52:38 -07:00
udp_tunnel.c
udp.c udp: gro behind static key 2018-10-05 11:52:38 -07:00
udplite.c
xfrm4_input.c xfrm: reset transport header back to network header after all input transforms ahave been applied 2018-09-04 10:26:30 +02:00
xfrm4_mode_beet.c
xfrm4_mode_transport.c xfrm: reset transport header back to network header after all input transforms ahave been applied 2018-09-04 10:26:30 +02:00
xfrm4_mode_tunnel.c
xfrm4_output.c
xfrm4_policy.c
xfrm4_protocol.c
xfrm4_state.c
xfrm4_tunnel.c