AuxXxilium/linux_dsm_epyc7002
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d74bad4e74
linux_dsm_epyc7002/include/net
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Andrey Ignatov d74bad4e74 bpf: Hooks for sys_connect 
== The problem ==

See description of the problem in the initial patch of this patch set.

== The solution ==

The patch provides much more reliable in-kernel solution for the 2nd
part of the problem: making outgoing connecttion from desired IP.

It adds new attach types `BPF_CGROUP_INET4_CONNECT` and
`BPF_CGROUP_INET6_CONNECT` for program type
`BPF_PROG_TYPE_CGROUP_SOCK_ADDR` that can be used to override both
source and destination of a connection at connect(2) time.

Local end of connection can be bound to desired IP using newly
introduced BPF-helper `bpf_bind()`. It allows to bind to only IP though,
and doesn't support binding to port, i.e. leverages
`IP_BIND_ADDRESS_NO_PORT` socket option. There are two reasons for this:
* looking for a free port is expensive and can affect performance
  significantly;
* there is no use-case for port.

As for remote end (`struct sockaddr *` passed by user), both parts of it
can be overridden, remote IP and remote port. It's useful if an
application inside cgroup wants to connect to another application inside
same cgroup or to itself, but knows nothing about IP assigned to the
cgroup.

Support is added for IPv4 and IPv6, for TCP and UDP.

IPv4 and IPv6 have separate attach types for same reason as sys_bind
hooks, i.e. to prevent reading from / writing to e.g. user_ip6 fields
when user passes sockaddr_in since it'd be out-of-bound.

== Implementation notes ==

The patch introduces new field in `struct proto`: `pre_connect` that is
a pointer to a function with same signature as `connect` but is called
before it. The reason is in some cases BPF hooks should be called way
before control is passed to `sk->sk_prot->connect`. Specifically
`inet_dgram_connect` autobinds socket before calling
`sk->sk_prot->connect` and there is no way to call `bpf_bind()` from
hooks from e.g. `ip4_datagram_connect` or `ip6_datagram_connect` since
it'd cause double-bind. On the other hand `proto.pre_connect` provides a
flexible way to add BPF hooks for connect only for necessary `proto` and
call them at desired time before `connect`. Since `bpf_bind()` is
allowed to bind only to IP and autobind in `inet_dgram_connect` binds
only port there is no chance of double-bind.

bpf_bind() sets `force_bind_address_no_port` to bind to only IP despite
of value of `bind_address_no_port` socket field.

bpf_bind() sets `with_lock` to `false` when calling to __inet_bind()
and __inet6_bind() since all call-sites, where bpf_bind() is called,
already hold socket lock.

Signed-off-by: Andrey Ignatov <rdna@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-03-31 02:15:54 +02:00
..
9p 9p: Implement show_options 2017-07-11 06:08:58 -04:00
bluetooth net: annotate ->poll() instances 2017-11-27 16:20:04 -05:00
caif caif: reduce stack size with KASAN 2018-01-19 14:02:12 -05:00
iucv net: annotate ->poll() instances 2017-11-27 16:20:04 -05:00
netfilter netfilter: nf_flow_offload: fix use-after-free and a resource leak 2018-02-07 11:55:52 +01:00
netns net: Replace ip_ra_lock with per-net mutex 2018-03-22 15:12:56 -04:00
nfc
phonet net: phonet: mark phonet_protocol as const 2017-10-07 23:15:08 +01:00
sctp sctp: use proc_remove_subtree() 2018-03-17 20:11:22 -04:00
tc_act net/sched: act_csum: don't use spinlock in the fast path 2018-01-23 19:51:46 -05:00
6lowpan.h
act_api.h net sched actions: add new tc_action_ops callback 2018-03-09 11:25:11 -05:00
addrconf.h bpf: Hooks for sys_connect 2018-03-31 02:15:54 +02:00
af_ieee802154.h
af_rxrpc.h rxrpc: Provide functions for allowing cleaner handling of signals 2017-10-18 11:42:48 +01:00
af_unix.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
af_vsock.h VSOCK: use TCP state constants for sk_state 2017-10-05 18:44:17 -07:00
ah.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
arp.h ipv4: Make neigh lookup keys for loopback/point-to-point devices be INADDR_ANY 2018-01-15 14:53:43 -05:00
atmclip.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ax25.h net: Make ax25_ptr depend on CONFIG_AX25 2018-02-14 11:55:33 -05:00
ax88796.h
bond_3ad.h
bond_alb.h
bond_options.h
bonding.h bonding: remove rtmsg_ifinfo called after bond_lower_state_changed 2017-10-25 10:54:39 +09:00
busy_poll.h net: fix compilation when busy poll is not enabled 2017-08-11 14:59:24 -07:00
calipso.h net, calipso: convert calipso_doi.refcount from atomic_t to refcount_t 2017-07-04 22:35:16 +01:00
cfg80211-wext.h
cfg80211.h mac80211: support A-MSDU in fast-rx 2018-02-27 13:30:53 +01:00
cfg802154.h
checksum.h
cipso_ipv4.h net, ipv4: convert cipso_v4_doi.refcount from atomic_t to refcount_t 2017-07-04 01:29:04 -07:00
cls_cgroup.h
codel_impl.h
codel_qdisc.h
codel.h
compat.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
datalink.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
dcbevent.h
dcbnl.h
devlink.h devlink: Remove top_hierarchy arg for DEVLINK disabled path 2018-03-23 12:14:18 -04:00
dn_dev.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
dn_fib.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
dn_neigh.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
dn_nsp.h net/decnet: Convert timers to use timer_setup() 2017-10-18 12:39:36 +01:00
dn_route.h decnet: Move dn_next into decnet route structure. 2017-11-30 09:54:25 -05:00
dn.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-11-04 09:26:51 +09:00
dsa.h dsa: Pass the port to get_sset_count() 2018-03-04 13:34:18 -05:00
dsfield.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
dst_cache.h net: core: dst_cache_set_ip6: Rename 'addr' parameter to 'saddr' for consistency 2018-03-05 12:52:45 -05:00
dst_metadata.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-11-04 09:26:51 +09:00
dst_ops.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
dst.h net: core: dst: Add kernel-doc for 'net' parameter 2018-03-05 12:52:45 -05:00
erspan.h net: erspan: fix metadata extraction 2018-02-06 11:32:48 -05:00
esp.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ethoc.h inet: whitespace cleanup 2018-02-28 11:43:28 -05:00
fib_notifier.h net: Add extack to fib_notifier_info 2017-11-01 11:50:43 +09:00
fib_rules.h net/ipv6: Pass skb to route lookup 2018-03-04 13:04:22 -05:00
firewire.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
flow_dissector.h tipc: improve link resiliency when rps is activated 2017-11-11 15:36:05 +09:00
flow.h net: Remove unused get_hash_from_flow functions 2018-03-04 13:04:23 -05:00
fou.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
fq_impl.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-10-30 21:09:24 +09:00
fq.h fq: support filtering a given tin 2017-10-11 09:49:34 +02:00
garp.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
gen_stats.h net: sched: add support for TCQ_F_NOLOCK subqueues to sch_mq 2017-12-08 13:32:26 -05:00
genetlink.h genetlink: fix genlmsg_nlhdr() 2017-11-16 10:49:00 +09:00
geneve.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
gre.h net: GRE: Add is_gretap_dev, is_ip6gretap_dev 2018-02-27 14:46:26 -05:00
gro_cells.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
gtp.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
gue.h fou: fix some member types in guehdr 2017-12-11 14:10:06 -05:00
hwbm.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
icmp.h
ieee80211_radiotap.h mac80211: support reporting A-MPDU EOF bit value/known 2018-02-22 21:13:02 +01:00
ieee802154_netdev.h
if_inet6.h net, ipv6: convert ifacaddr6.aca_refcnt from atomic_t to refcount_t 2017-07-04 01:29:04 -07:00
ife.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ila.h
inet6_connection_sock.h
inet6_hashtables.h net: ipv6: add second dif to inet6 socket lookups 2017-08-07 11:39:22 -07:00
inet_common.h net: Introduce __inet_bind() and __inet6_bind 2018-03-31 02:15:43 +02:00
inet_connection_sock.h inet: whitespace cleanup 2018-02-28 11:43:28 -05:00
inet_ecn.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-11-04 09:26:51 +09:00
inet_frag.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-11-04 09:26:51 +09:00
inet_hashtables.h inet: Add a 2nd listener hashtable (port+addr) 2017-12-03 10:18:28 -05:00
inet_sock.h net: sock: replace sk_state_load with inet_sk_state_load and remove sk_state_store 2017-12-20 14:00:25 -05:00
inet_timewait_sock.h tcp/dccp: avoid one atomic operation for timewait hashdance 2017-12-13 14:33:10 -05:00
inetpeer.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ip6_checksum.h
ip6_fib.h net/ipv6: Pass skb to route lookup 2018-03-04 13:04:22 -05:00
ip6_route.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-03-23 11:31:58 -04:00
ip6_tunnel.h ip6_gre: add erspan v2 support 2017-12-15 12:34:00 -05:00
ip_fib.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-03-23 11:31:58 -04:00
ip_tunnels.h net: do not create fallback tunnels for non-default namespaces 2018-03-09 11:23:11 -05:00
ip_vs.h netfilter: ipvs: Remove useless ipvsh param of frag_safe_skb_hp 2018-01-08 18:01:02 +01:00
ip.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-03-23 11:31:58 -04:00
ipcomp.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ipconfig.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ipv6.h net: Introduce __inet_bind() and __inet6_bind 2018-03-31 02:15:43 +02:00
ipx.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
iw_handler.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
kcm.h
l3mdev.h
lapb.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
lib80211.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
llc_c_ac.h net: LLC: Convert timers to use timer_setup() 2017-10-25 12:06:25 +09:00
llc_c_ev.h
llc_c_st.h
llc_conn.h
llc_if.h
llc_pdu.h
llc_s_ac.h
llc_s_ev.h
llc_s_st.h
llc_sap.h
llc.h net, llc: convert llc_sap.refcnt from atomic_t to refcount_t 2017-07-04 22:35:15 +01:00
lwtunnel.h net: Move ipv4 set_lwt_redirect helper to lwtunnel 2018-02-14 14:43:32 -05:00
mac80211.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-03-23 11:31:58 -04:00
mac802154.h
mip6.h
mld.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mpls_iptunnel.h
mpls.h
mrp.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ncsi.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ndisc.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
neighbour.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-11-04 09:26:51 +09:00
net_namespace.h net: add uevent socket member 2018-03-22 11:16:42 -04:00
net_ratelimit.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
netevent.h net/ipv6: Add support for path selection using hash of 5-tuple 2018-03-04 13:04:23 -05:00
netlabel.h net: convert netlbl_lsm_cache.refcount from atomic_t to refcount_t 2017-07-01 07:39:09 -07:00
netlink.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
netprio_cgroup.h
netrom.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
nexthop.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
nl802154.h
nsh.h openvswitch: enable NSH support 2017-11-08 16:12:33 +09:00
p8022.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ping.h
pkt_cls.h net: sch: prio: Add offload ability for grafting a child 2018-02-28 12:06:01 -05:00
pkt_sched.h net: remove prototype of qdisc_lookup_class() 2018-01-16 14:56:54 -05:00
pptp.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
protocol.h IPv4: early demux can return an error code 2017-10-01 03:55:47 +01:00
psample.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
psnap.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
raw.h net: ipv4: add second dif to raw socket lookups 2017-08-07 11:39:21 -07:00
rawv6.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
red.h net_sched: red: Avoid illegal values 2017-12-05 14:37:13 -05:00
regulatory.h regulatory: add NUL to request alpha2 2018-02-22 20:57:48 +01:00
request_sock.h tcp: socket option to set TCP fast open key 2017-10-20 13:21:36 +01:00
rose.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
route.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-03-23 11:31:58 -04:00
rtnetlink.h rtnetlink: remove __rtnl_register 2017-12-04 11:32:53 -05:00
sch_generic.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-03-23 11:31:58 -04:00
scm.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
secure_seq.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
seg6_hmac.h
seg6.h ipv6: sr: add support for ip4ip6 encapsulation 2017-08-25 17:10:23 -07:00
slhc_vj.h
smc.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
snmp.h
sock_reuseport.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sock.h bpf: Hooks for sys_connect 2018-03-31 02:15:54 +02:00
Space.h net/mac89x0: Convert to platform_driver 2018-03-01 21:21:36 -05:00
stp.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
strparser.h strparser: Use delayed work instead of timer for msg timeout 2017-10-25 10:37:11 +09:00
switchdev.h net: bridge: Add/del switchdev object on host join/leave 2017-11-10 13:41:40 +09:00
tcp_states.h tcp: remove the hardcode in the definition of TCPF Macro 2018-02-21 15:06:05 -05:00
tcp.h tcp_bbr: better deal with suboptimal GSO (II) 2018-03-01 21:44:28 -05:00
timewait_sock.h
tipc.h tipc: improve link resiliency when rps is activated 2017-11-11 15:36:05 +09:00
tls.h tls: Add support for encryption using async offload accelerator 2018-01-31 10:26:30 -05:00
transp_v6.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
tso.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
tun_proto.h vxlan: factor out VXLAN-GPE next protocol 2017-08-29 15:16:52 -07:00
udp_tunnel.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
udp.h bpf: Hooks for sys_connect 2018-03-31 02:15:54 +02:00
udplite.h udplite: fix partial checksum initialization 2018-02-16 15:57:42 -05:00
vsock_addr.h
vxlan.h vxlan: Fix trailing semicolon 2018-01-17 16:07:24 -05:00
wext.h lift handling of SIOCIW... out of dev_ioctl() 2018-01-24 19:13:45 -05:00
wimax.h
x25.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
x25device.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
xdp.h xdp/qede: setup xdp_rxq_info and intro xdp_rxq_info_is_reg 2018-01-05 15:21:21 -08:00
xfrm.h inet: whitespace cleanup 2018-02-28 11:43:28 -05:00