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Hangbin Liu 503e9229b0 iproute2: add check_libbpf() and get_libbpf_version() 
This patch aim to add basic checking functions for later iproute2
libbpf support.

First we add check_libbpf() in configure to see if we have bpf library
support. By default the system libbpf will be used, but static linking
against a custom libbpf version can be achieved by passing libbpf DESTDIR
to variable LIBBPF_DIR for configure.

Another variable LIBBPF_FORCE is used to control whether to build iproute2
with libbpf. If set to on, then force to build with libbpf and exit if
not available. If set to off, then force to not build with libbpf.

When dynamically linking against libbpf, we can't be sure that the
version we discovered at compile time is actually the one we are
using at runtime. This can lead to hard-to-debug errors. So we add
a new file lib/bpf_glue.c and a helper function get_libbpf_version()
to get correct libbpf version at runtime.

Signed-off-by: Hangbin Liu <haliu@redhat.com>
Signed-off-by: David Ahern <dsahern@gmail.com>
 		2020-11-24 22:14:02 -07:00
..
.gitignore make yacc usage POSIX compatible 2020-01-20 09:43:22 -08:00
Makefile tc: Add helpers to support qevent handling 2020-07-05 15:37:27 +00:00
e_bpf.c treewide: refactor help messages 2019-05-20 14:35:07 -07:00
em_canid.c drop unneeded include of syslog.h 2017-11-12 16:22:36 -08:00
em_cmp.c drop unneeded include of syslog.h 2017-11-12 16:22:36 -08:00
em_ipset.c Include bsd/string.h only in include/utils.h 2018-11-05 08:38:32 -08:00
em_ipt.c tc: fix spelling errors 2019-08-12 18:18:51 -07:00
em_meta.c tc/meta: make meta_table static and const 2018-11-19 11:42:44 -08:00
em_nbyte.c drop unneeded include of syslog.h 2017-11-12 16:22:36 -08:00
em_u32.c drop unneeded include of syslog.h 2017-11-12 16:22:36 -08:00
emp_ematch.l make yacc usage POSIX compatible 2020-01-20 09:43:22 -08:00
emp_ematch.y make yacc usage POSIX compatible 2020-01-20 09:43:22 -08:00
f_basic.c treewide: refactor help messages 2019-05-20 14:35:07 -07:00
f_bpf.c tc: full JSON support for 'bpf' filter 2020-05-05 16:19:06 +00:00
f_cgroup.c tc actions: Improved batching and time filtered dumping 2017-08-04 13:16:51 -07:00
f_flow.c treewide: refactor help messages 2019-05-20 14:35:07 -07:00
f_flower.c tc flower: fix parsing vlan_id and vlan_prio 2020-11-24 21:45:20 -07:00
f_fw.c treewide: refactor help messages 2019-05-20 14:35:07 -07:00
f_matchall.c treewide: refactor help messages 2019-05-20 14:35:07 -07:00
f_route.c treewide: refactor help messages 2019-05-20 14:35:07 -07:00
f_rsvp.c treewide: refactor help messages 2019-05-20 14:35:07 -07:00
f_tcindex.c treewide: refactor help messages 2019-05-20 14:35:07 -07:00
f_u32.c tc: f_u32: allow skip_hw and skip_sw flags to be last 2018-11-09 08:12:29 -08:00
m_action.c Replace open-coded instances of print_nl() 2020-05-04 17:13:53 -07:00
m_bpf.c tc: skip actions that don't have options attribute when printing 2020-10-31 09:14:01 -06:00
m_connmark.c tc: skip actions that don't have options attribute when printing 2020-10-31 09:14:01 -06:00
m_csum.c tc: skip actions that don't have options attribute when printing 2020-10-31 09:14:01 -06:00
m_ct.c tc: skip actions that don't have options attribute when printing 2020-10-31 09:14:01 -06:00
m_ctinfo.c tc: skip actions that don't have options attribute when printing 2020-10-31 09:14:01 -06:00
m_ematch.c tc/ematch: make local functions static 2018-11-19 11:42:44 -08:00
m_ematch.h tc/ematch: make local functions static 2018-11-19 11:42:44 -08:00
m_estimator.c tc/m_estimator: Print proper value for estimator interval in raw. 2020-07-20 13:25:56 -07:00
m_gact.c tc: skip actions that don't have options attribute when printing 2020-10-31 09:14:01 -06:00
m_gate.c tc/m_gate: fix spelling errors 2020-11-08 10:34:23 -08:00
m_ife.c tc: skip actions that don't have options attribute when printing 2020-10-31 09:14:01 -06:00
m_ipt.c tc: skip actions that don't have options attribute when printing 2020-10-31 09:14:01 -06:00
m_mirred.c tc: skip actions that don't have options attribute when printing 2020-10-31 09:14:01 -06:00
m_mpls.c Merge branch 'main' into next 2020-11-24 22:04:48 -07:00
m_nat.c tc: skip actions that don't have options attribute when printing 2020-10-31 09:14:01 -06:00
m_pedit.c tc: skip actions that don't have options attribute when printing 2020-10-31 09:14:01 -06:00
m_pedit.h tc/pedit: make functions static 2018-11-19 11:42:44 -08:00
m_police.c action police: make 'mtu' could be set independently in police action 2020-07-05 15:34:04 +00:00
m_sample.c tc: skip actions that don't have options attribute when printing 2020-10-31 09:14:01 -06:00
m_simple.c tc: skip actions that don't have options attribute when printing 2020-10-31 09:14:01 -06:00
m_skbedit.c tc: skip actions that don't have options attribute when printing 2020-10-31 09:14:01 -06:00
m_skbmod.c tc: skip actions that don't have options attribute when printing 2020-10-31 09:14:01 -06:00
m_tunnel_key.c tc: skip actions that don't have options attribute when printing 2020-10-31 09:14:01 -06:00
m_vlan.c Merge branch 'main' into next 2020-11-24 22:04:48 -07:00
m_xt.c tc: skip actions that don't have options attribute when printing 2020-10-31 09:14:01 -06:00
m_xt_old.c tc: skip actions that don't have options attribute when printing 2020-10-31 09:14:01 -06:00
p_eth.c tc/pedit: use structure initialization 2018-11-19 11:42:44 -08:00
p_icmp.c tc/pedit: use structure initialization 2018-11-19 11:42:44 -08:00
p_ip.c tc/pedit: use structure initialization 2018-11-19 11:42:44 -08:00
p_ip6.c tc: p_ip6: Support pedit of IPv6 dsfield 2020-04-09 14:39:58 +00:00
p_tcp.c tc/pedit: use structure initialization 2018-11-19 11:42:44 -08:00
p_udp.c tc/pedit: use structure initialization 2018-11-19 11:42:44 -08:00
q_atm.c treewide: refactor help messages 2019-05-20 14:35:07 -07:00
q_cake.c q_cake: properly print memlimit 2020-04-20 09:33:15 -07:00
q_cbq.c treewide: refactor help messages 2019-05-20 14:35:07 -07:00
q_cbs.c tc: cbs: add support for JSON output 2019-12-29 09:57:27 -08:00
q_choke.c tc: choke: add support for JSON output 2019-12-29 09:57:27 -08:00
q_clsact.c SPDX license identifiers 2017-11-24 12:21:35 -08:00
q_codel.c tc: codel: add support for JSON output 2019-12-29 09:57:27 -08:00
q_drr.c treewide: Use addattr_nest()/addattr_nest_end() to handle nested attributes 2018-02-02 15:01:09 -08:00
q_dsmark.c treewide: Use addattr_nest()/addattr_nest_end() to handle nested attributes 2018-02-02 15:01:09 -08:00
q_etf.c etf: Add skip_sock_check 2019-07-18 15:44:21 -07:00
q_ets.c tc: Add support for ETS Qdisc 2020-01-18 21:54:12 +00:00
q_fifo.c tc: jsonify output of q_fifo 2018-10-08 09:22:22 -07:00
q_fq.c tc: fq: clarify the length of orphan_mask. 2020-10-15 15:16:52 -07:00
q_fq_codel.c tc: fq_codel: add drop_batch parameter 2020-04-27 14:56:42 -07:00
q_fq_pie.c tc: add support for FQ-PIE packet scheduler 2020-02-04 03:24:39 -08:00
q_gred.c treewide: refactor help messages 2019-05-20 14:35:07 -07:00
q_hfsc.c treewide: Use addattr_nest()/addattr_nest_end() to handle nested attributes 2018-02-02 15:01:09 -08:00
q_hhf.c tc: hhf: add support for JSON output 2019-12-29 09:57:27 -08:00
q_htb.c fix print_0xhex on 32 bit 2018-12-10 14:20:32 -08:00
q_ingress.c ingress: Don't break JSON output 2018-04-25 11:08:39 -07:00
q_mqprio.c tc: mqprio: reject queues count/offset pair count higher than num_tc 2020-05-18 14:57:15 +00:00
q_multiq.c tc: B.W limits can now be specified in %. 2017-11-24 11:22:13 -08:00
q_netem.c tc: fix spelling errors 2019-08-12 18:18:51 -07:00
q_pie.c Revert "tc: pie: change maximum integer value of tc_pie_xstats->prob" 2020-03-10 18:29:26 +00:00
q_plug.c tc: add support for plug qdisc 2019-05-04 09:22:14 -07:00
q_prio.c tc: prio: fix space in JSON tag 2020-01-06 13:11:41 -08:00
q_qfq.c treewide: Use addattr_nest()/addattr_nest_end() to handle nested attributes 2018-02-02 15:01:09 -08:00
q_red.c tc: Add space after format specifier 2020-07-29 17:03:46 +00:00
q_rr.c tc: B.W limits can now be specified in %. 2017-11-24 11:22:13 -08:00
q_sfb.c tc: sfb: add support for JSON output 2019-12-29 09:57:27 -08:00
q_sfq.c tc: sfq: add support for JSON output 2019-12-29 09:57:27 -08:00
q_skbprio.c tc: skbprio: add support for JSON output 2020-01-06 13:12:02 -08:00
q_taprio.c Replace open-coded instances of print_nl() 2020-05-04 17:13:53 -07:00
q_tbf.c tc: tbf: add support for JSON output 2019-12-29 09:57:27 -08:00
static-syms.c SPDX license identifiers 2017-11-24 12:21:35 -08:00
tc.c iproute2: add check_libbpf() and get_libbpf_version() 2020-11-24 22:14:02 -07:00
tc_cbq.c tc: fix spelling errors 2019-08-12 18:18:51 -07:00
tc_cbq.h SPDX license identifiers 2017-11-24 12:21:35 -08:00
tc_class.c tc: parse attributes with NLA_F_NESTED flag 2020-01-22 03:45:48 +00:00
tc_common.h Revert "tc: Add batchsize feature for filter and actions" 2019-08-02 09:34:51 -07:00
tc_core.c iproute2-next: police: support 64bit rate and peakrate in tc utility 2019-09-15 10:39:19 -07:00
tc_core.h iproute2-next: police: support 64bit rate and peakrate in tc utility 2019-09-15 10:39:19 -07:00
tc_estimator.c tc: support conversions to or from 64 bit nanosecond-based time 2018-08-30 11:04:38 -07:00
tc_exec.c treewide: refactor help messages 2019-05-20 14:35:07 -07:00
tc_filter.c tc: implement support for terse dump 2020-10-31 09:15:15 -06:00
tc_monitor.c Tree wide: Drop sockaddr_nl arg 2018-10-22 09:43:48 -07:00
tc_qdisc.c tc: Look for blocks in qevents 2020-07-20 16:34:02 +00:00
tc_qevent.c tc: Add space after format specifier 2020-07-29 17:03:46 +00:00
tc_qevent.h tc: Look for blocks in qevents 2020-07-20 16:34:02 +00:00
tc_red.c tc: q_red: Support 'nodrop' flag 2020-03-25 16:45:37 +00:00
tc_red.h tc: move RED flag printing to helper 2018-11-24 07:10:58 -08:00
tc_stab.c drop unneeded include of syslog.h 2017-11-12 16:22:36 -08:00
tc_util.c tc: report time an action was first used 2020-05-31 22:51:19 +00:00
tc_util.h tc: Look for blocks in qevents 2020-07-20 16:34:02 +00:00