Martin KaFai Lau 655a51e536 bpf: Add struct bpf_tcp_sock and BPF_FUNC_tcp_sock ... This patch adds a helper function BPF_FUNC_tcp_sock and it is currently available for cg_skb and sched_(cls|act): struct bpf_tcp_sock *bpf_tcp_sock(struct bpf_sock *sk); int cg_skb_foo(struct __sk_buff *skb) { struct bpf_tcp_sock *tp; struct bpf_sock *sk; __u32 snd_cwnd; sk = skb->sk; if (!sk) return 1; tp = bpf_tcp_sock(sk); if (!tp) return 1; snd_cwnd = tp->snd_cwnd; /* ... */ return 1; } A 'struct bpf_tcp_sock' is also added to the uapi bpf.h to provide read-only access. bpf_tcp_sock has all the existing tcp_sock's fields that has already been exposed by the bpf_sock_ops. i.e. no new tcp_sock's fields are exposed in bpf.h. This helper returns a pointer to the tcp_sock. If it is not a tcp_sock or it cannot be traced back to a tcp_sock by sk_to_full_sk(), it returns NULL. Hence, the caller needs to check for NULL before accessing it. The current use case is to expose members from tcp_sock to allow a cg_skb_bpf_prog to provide per cgroup traffic policing/shaping. Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Martin KaFai Lau <kafai@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>		2019-02-10 19:46:17 -08:00
..
datagram.c	for-4.21/block-20181221	2018-12-28 13:19:59 -08:00
dev_addr_lists.c	net: dev: Issue NETDEV_PRE_CHANGEADDR	2018-12-13 18:41:38 -08:00
dev_ioctl.c	net: dev: Add extack argument to dev_set_mac_address()	2018-12-13 18:41:38 -08:00
dev.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next	2019-02-06 16:56:20 -08:00
devlink.c	devlink: Add health dump {get,clear} commands	2019-02-07 10:34:29 -08:00
drop_monitor.c	treewide: setup_timer() -> timer_setup()	2017-11-21 15:57:07 -08:00
dst_cache.c	net: core: dst_cache_set_ip6: Rename 'addr' parameter to 'saddr' for consistency	2018-03-05 12:52:45 -05:00
dst.c	net: add a route cache full diagnostic message	2019-01-17 15:37:25 -08:00
ethtool.c	ethtool: add ethtool_rx_flow_spec to flow_rule structure translator	2019-02-06 10:38:26 -08:00
failover.c	net: Introduce generic failover module	2018-05-28 22:59:54 -04:00
fib_notifier.c	net: Fix fib notifer to return errno	2018-03-29 14:10:30 -04:00
fib_rules.c	net/fib_rules: Update fib_nl_dumprule for strict data checking	2018-10-08 10:39:05 -07:00
filter.c	bpf: Add struct bpf_tcp_sock and BPF_FUNC_tcp_sock	2019-02-10 19:46:17 -08:00
flow_dissector.c	net/flow_dissector: move bpf case into __skb_flow_bpf_dissect	2019-01-29 01:08:29 +01:00
flow_offload.c	flow_offload: add flow action infrastructure	2019-02-06 10:38:25 -08:00
gen_estimator.c	net: core: protect rate estimator statistics pointer with lock	2018-08-11 12:37:10 -07:00
gen_stats.c	net/core: make function ___gnet_stats_copy_basic() static	2018-09-28 10:25:11 -07:00
gro_cells.c	gro_cell: add napi_disable in gro_cells_destroy	2018-12-19 15:50:02 -08:00
hwbm.c	net: hwbm: Fix unbalanced spinlock in error case	2016-05-25 12:35:09 -07:00
link_watch.c	net: linkwatch: add check for netdevice being present to linkwatch_do_dev	2018-09-19 21:06:46 -07:00
lwt_bpf.c	bpf: in __bpf_redirect_no_mac pull mac only if present	2019-01-20 01:11:48 +01:00
lwtunnel.c	ipv6: sr: define core operations for seg6local lightweight tunnel	2017-08-07 14:16:22 -07:00
Makefile	flow_offload: add flow_rule and flow_match structures and use them	2019-02-06 10:38:25 -08:00
neighbour.c	neighbour: Do not perturb drop profiles when neigh_probe	2019-01-17 22:08:14 -08:00
net_namespace.c	net: namespace: perform strict checks also for doit handlers	2019-01-19 10:09:58 -08:00
net-procfs.c	proc: introduce proc_create_net{,_data}	2018-05-16 07:24:30 +02:00
net-sysfs.c	net: Get rid of SWITCHDEV_ATTR_ID_PORT_PARENT_ID	2019-02-06 14:17:03 -08:00
net-sysfs.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
net-traces.c	net/ipv6: Udate fib6_table_lookup tracepoint	2018-05-24 23:01:15 -04:00
netclassid_cgroup.c	cgroup, netclassid: add a preemption point to write_classid	2018-10-23 12:58:17 -07:00
netevent.c
netpoll.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2018-12-27 13:04:52 -08:00
netprio_cgroup.c	net: remove duplicate includes	2017-12-13 13:18:46 -05:00
page_pool.c	net/page_pool: Fix inconsistent lock state warning	2018-07-19 23:23:01 -07:00
pktgen.c	pktgen: Fix fall-through annotation	2018-09-13 15:36:41 -07:00
ptp_classifier.c	ptp: Change ptp_class to a proper bitmask	2015-11-03 11:08:22 -05:00
request_sock.c	ipv4: Namespaceify tcp_max_syn_backlog knob	2016-12-29 11:38:31 -05:00
rtnetlink.c	net: Get rid of SWITCHDEV_ATTR_ID_PORT_PARENT_ID	2019-02-06 14:17:03 -08:00
scm.c	socket: Add SO_TIMESTAMPING_NEW	2019-02-03 11:17:31 -08:00
secure_seq.c	infiniband: i40iw, nes: don't use wall time for TCP sequence numbers	2018-07-11 12:10:19 -06:00
skbuff.c	net, skbuff: do not prefer skb allocation fails early	2019-01-04 12:53:16 -08:00
skmsg.c	Optimize sk_msg_clone() by data merge to end dst sg entry	2019-01-17 11:42:26 -08:00
sock_diag.c	net: sock_diag: Fix spectre v1 gadget in __sock_diag_cmd()	2018-08-14 10:01:24 -07:00
sock_map.c	bpf: skmsg, fix psock create on existing kcm/tls port	2018-10-20 00:40:45 +02:00
sock_reuseport.c	sctp: add sock_reuseport for the sock in __sctp_hash_endpoint	2018-11-12 09:09:51 -08:00
sock.c	net: Fix fall through warning in y2038 tstamp changes.	2019-02-03 20:25:31 -08:00
stream.c	tcp: reduce POLLOUT events caused by TCP_NOTSENT_LOWAT	2018-12-04 21:21:18 -08:00
sysctl_net_core.c	net: introduce a knob to control whether to inherit devconf config	2019-01-22 11:07:21 -08:00
timestamping.c	net: skb_defer_rx_timestamp should check for phydev before setting up classify	2015-07-09 14:17:15 -07:00
tso.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
utils.c	net: Remove some unneeded semicolon	2018-08-04 13:05:39 -07:00
xdp.c	xdp: remove redundant variable 'headroom'	2018-09-01 01:35:53 +02:00