Daniel Borkmann 7bd509e311 bpf: add prog_digest and expose it via fdinfo/netlink ... When loading a BPF program via bpf(2), calculate the digest over the program's instruction stream and store it in struct bpf_prog's digest member. This is done at a point in time before any instructions are rewritten by the verifier. Any unstable map file descriptor number part of the imm field will be zeroed for the hash. fdinfo example output for progs: # cat /proc/1590/fdinfo/5 pos: 0 flags: 02000002 mnt_id: 11 prog_type: 1 prog_jited: 1 prog_digest: b27e8b06da22707513aa97363dfb11c7c3675d28 memlock: 4096 When programs are pinned and retrieved by an ELF loader, the loader can check the program's digest through fdinfo and compare it against one that was generated over the ELF file's program section to see if the program needs to be reloaded. Furthermore, this can also be exposed through other means such as netlink in case of a tc cls/act dump (or xdp in future), but also through tracepoints or other facilities to identify the program. Other than that, the digest can also serve as a base name for the work in progress kallsyms support of programs. The digest doesn't depend/select the crypto layer, since we need to keep dependencies to a minimum. iproute2 will get support for this facility. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>		2016-12-05 15:33:11 -05:00
..
act_api.c	net_sched: gen_estimator: complete rewrite of rate estimators	2016-12-05 15:21:59 -05:00
act_bpf.c	bpf: add prog_digest and expose it via fdinfo/netlink	2016-12-05 15:33:11 -05:00
act_connmark.c	netns: make struct pernet_operations::id unsigned int	2016-11-18 10:59:15 -05:00
act_csum.c	netns: make struct pernet_operations::id unsigned int	2016-11-18 10:59:15 -05:00
act_gact.c	netns: make struct pernet_operations::id unsigned int	2016-11-18 10:59:15 -05:00
act_ife.c	netns: make struct pernet_operations::id unsigned int	2016-11-18 10:59:15 -05:00
act_ipt.c	netns: make struct pernet_operations::id unsigned int	2016-11-18 10:59:15 -05:00
act_meta_mark.c	Support to encoding decoding skb mark on IFE action	2016-03-01 17:15:23 -05:00
act_meta_skbprio.c	Support to encoding decoding skb prio on IFE action	2016-03-01 17:15:23 -05:00
act_meta_skbtcindex.c	net sched ife action: Introduce skb tcindex metadata encap decap	2016-09-19 21:55:28 -04:00
act_mirred.c	act_mirred: fix a typo in get_dev	2016-12-03 19:28:02 -05:00
act_nat.c	netns: make struct pernet_operations::id unsigned int	2016-11-18 10:59:15 -05:00
act_pedit.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-12-03 12:29:53 -05:00
act_police.c	net_sched: gen_estimator: complete rewrite of rate estimators	2016-12-05 15:21:59 -05:00
act_simple.c	netns: make struct pernet_operations::id unsigned int	2016-11-18 10:59:15 -05:00
act_skbedit.c	netns: make struct pernet_operations::id unsigned int	2016-11-18 10:59:15 -05:00
act_skbmod.c	netns: make struct pernet_operations::id unsigned int	2016-11-18 10:59:15 -05:00
act_tunnel_key.c	netns: make struct pernet_operations::id unsigned int	2016-11-18 10:59:15 -05:00
act_vlan.c	netns: make struct pernet_operations::id unsigned int	2016-11-18 10:59:15 -05:00
cls_api.c	net/sched: cls_flower: Add offload support using egress Hardware device	2016-12-02 13:28:37 -05:00
cls_basic.c	net, sched: respect rcu grace period on cls destruction	2016-11-28 10:47:35 -05:00
cls_bpf.c	bpf: add prog_digest and expose it via fdinfo/netlink	2016-12-05 15:33:11 -05:00
cls_cgroup.c	net, sched: respect rcu grace period on cls destruction	2016-11-28 10:47:35 -05:00
cls_flow.c	net, sched: respect rcu grace period on cls destruction	2016-11-28 10:47:35 -05:00
cls_flower.c	net/sched: cls_flower: Set the filter Hardware device for all use-cases	2016-12-05 15:06:58 -05:00
cls_fw.c	net sched: stylistic cleanups	2016-09-19 22:04:14 -04:00
cls_matchall.c	net, sched: respect rcu grace period on cls destruction	2016-11-28 10:47:35 -05:00
cls_route.c	net_sched: check NULL on error path in route4_change()	2016-09-23 06:51:49 -04:00
cls_rsvp6.c
cls_rsvp.c
cls_rsvp.h	net, sched: respect rcu grace period on cls destruction	2016-11-28 10:47:35 -05:00
cls_tcindex.c	net, sched: respect rcu grace period on cls destruction	2016-11-28 10:47:35 -05:00
cls_u32.c	net sched: stylistic cleanups	2016-09-19 22:04:14 -04:00
em_canid.c	net: sched: remove tcf_proto from ematch calls	2014-10-06 18:02:32 -04:00
em_cmp.c	net_sched: cleanups	2011-01-19 23:31:12 -08:00
em_ipset.c	netfilter: x_tables: move hook state into xt_action_param structure	2016-11-03 10:56:21 +01:00
em_meta.c	net/sched: em_meta: Fix 'meta vlan' to correctly recognize zero VID frames	2016-10-23 17:31:25 -04:00
em_nbyte.c	net: sched: remove tcf_proto from ematch calls	2014-10-06 18:02:32 -04:00
em_text.c	net: Remove state argument from skb_find_text()	2015-02-22 15:59:54 -05:00
em_u32.c	net_sched: cleanups	2011-01-19 23:31:12 -08:00
ematch.c	ematch: Fix auto-loading of ematch modules.	2015-02-20 15:30:56 -05:00
Kconfig	net sched ife action: Introduce skb tcindex metadata encap decap	2016-09-19 21:55:28 -04:00
Makefile	net sched ife action: Introduce skb tcindex metadata encap decap	2016-09-19 21:55:28 -04:00
sch_api.c	net_sched: gen_estimator: complete rewrite of rate estimators	2016-12-05 15:21:59 -05:00
sch_atm.c	net_sched: drop packets after root qdisc lock is released	2016-06-25 12:19:35 -04:00
sch_blackhole.c	net_sched: drop packets after root qdisc lock is released	2016-06-25 12:19:35 -04:00
sch_cbq.c	net_sched: gen_estimator: complete rewrite of rate estimators	2016-12-05 15:21:59 -05:00
sch_choke.c	net_sched: drop packets after root qdisc lock is released	2016-06-25 12:19:35 -04:00
sch_codel.c	sched: replace __skb_dequeue with __qdisc_dequeue_head	2016-09-19 01:47:18 -04:00
sch_drr.c	net_sched: gen_estimator: complete rewrite of rate estimators	2016-12-05 15:21:59 -05:00
sch_dsmark.c	net_sched: drop packets after root qdisc lock is released	2016-06-25 12:19:35 -04:00
sch_fifo.c	sched: don't use skb queue helpers	2016-09-19 01:47:18 -04:00
sch_fq_codel.c	net_sched: fq_codel: cache skb->truesize into skb->cb	2016-06-25 12:19:35 -04:00
sch_fq.c	net_sched: sch_fq: use hash_ptr()	2016-11-17 13:28:56 -05:00
sch_generic.c	net_sched: gen_estimator: complete rewrite of rate estimators	2016-12-05 15:21:59 -05:00
sch_gred.c	net_sched: drop packets after root qdisc lock is released	2016-06-25 12:19:35 -04:00
sch_hfsc.c	net_sched: gen_estimator: complete rewrite of rate estimators	2016-12-05 15:21:59 -05:00
sch_hhf.c	net_sched: drop packets after root qdisc lock is released	2016-06-25 12:19:35 -04:00
sch_htb.c	net_sched: gen_estimator: complete rewrite of rate estimators	2016-12-05 15:21:59 -05:00
sch_ingress.c	net: sched: fix tc_should_offload for specific clsact classes	2016-06-07 16:59:53 -07:00
sch_mq.c	net: sched: convert qdisc linked list to hashtable	2016-08-10 17:19:02 -07:00
sch_mqprio.c	net: sched: convert qdisc linked list to hashtable	2016-08-10 17:19:02 -07:00
sch_multiq.c	net_sched: drop packets after root qdisc lock is released	2016-06-25 12:19:35 -04:00
sch_netem.c	sched: add and use qdisc_skb_head helpers	2016-09-19 01:47:18 -04:00
sch_pie.c	sched: replace __skb_dequeue with __qdisc_dequeue_head	2016-09-19 01:47:18 -04:00
sch_plug.c	net_sched: drop packets after root qdisc lock is released	2016-06-25 12:19:35 -04:00
sch_prio.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-06-30 05:03:36 -04:00
sch_qfq.c	net_sched: gen_estimator: complete rewrite of rate estimators	2016-12-05 15:21:59 -05:00
sch_red.c	net_sched: drop packets after root qdisc lock is released	2016-06-25 12:19:35 -04:00
sch_sfb.c	sch_sfb: keep backlog updated with qlen	2016-09-23 06:52:31 -04:00
sch_sfq.c	net_sched: drop packets after root qdisc lock is released	2016-06-25 12:19:35 -04:00
sch_tbf.c	net_sched: drop packets after root qdisc lock is released	2016-06-25 12:19:35 -04:00
sch_teql.c	net: use core MTU range checking in core net infra	2016-10-20 14:51:09 -04:00