| Message ID | 20201109070802.3638167-1-haliu@redhat.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | iproute2: add libbpf support | expand |
This series converts iproute2 to use libbpf for loading and attaching
BPF programs when it is available. This means that iproute2 will
correctly process BTF information and support the new-style BTF-defined
maps, while keeping compatibility with the old internal map definition
syntax.
This is achieved by checking for libbpf at './configure' time, and using
it if available. By default the system libbpf will be used, but static
linking against a custom libbpf version can be achieved by passing
LIBBPF_DIR to configure. LIBBPF_FORCE can be set to on to force configure
abort if no suitable libbpf is found (useful for automatic packaging
that wants to enforce the dependency), or set off to disable libbpf check
and build iproute2 with legacy bpf.
The old iproute2 bpf code is kept and will be used if no suitable libbpf
is available. When using libbpf, wrapper code ensures that iproute2 will
still understand the old map definition format, including populating
map-in-map and tail call maps before load.
The examples in bpf/examples are kept, and a separate set of examples
are added with BTF-based map definitions for those examples where this
is possible (libbpf doesn't currently support declaratively populating
tail call maps).
At last, Thanks a lot for Toke's help on this patch set.
v5:
a) Fix LIBBPF_DIR typo and description, use libbpf DESTDIR as LIBBPF_DIR
dest.
b) Fix bpf_prog_load_dev typo.
c) rebase to latest iproute2-next.
v4:
a) Make variable LIBBPF_FORCE able to control whether build iproute2
with libbpf or not.
b) Add new file bpf_glue.c to for libbpf/legacy mixed bpf calls.
c) Fix some build issues and shell compatibility error.
v3:
a) Update configure to Check function bpf_program__section_name() separately
b) Add a new function get_bpf_program__section_name() to choose whether to
use bpf_program__title() or not.
c) Test build the patch on Fedora 33 with libbpf-0.1.0-1.fc33 and
libbpf-devel-0.1.0-1.fc33
v2:
a) Remove self defined IS_ERR_OR_NULL and use libbpf_get_error() instead.
b) Add ipvrf with libbpf support.
Here are the test results with patched iproute2:
== setup env
# clang -O2 -Wall -g -target bpf -c bpf_graft.c -o btf_graft.o
# clang -O2 -Wall -g -target bpf -c bpf_map_in_map.c -o btf_map_in_map.o
# clang -O2 -Wall -g -target bpf -c bpf_shared.c -o btf_shared.o
# clang -O2 -Wall -g -target bpf -c legacy/bpf_cyclic.c -o bpf_cyclic.o
# clang -O2 -Wall -g -target bpf -c legacy/bpf_graft.c -o bpf_graft.o
# clang -O2 -Wall -g -target bpf -c legacy/bpf_map_in_map.c -o bpf_map_in_map.o
# clang -O2 -Wall -g -target bpf -c legacy/bpf_shared.c -o bpf_shared.o
# clang -O2 -Wall -g -target bpf -c legacy/bpf_tailcall.c -o bpf_tailcall.o
# rm -rf /sys/fs/bpf/xdp/globals
# /root/iproute2/ip/ip link add type veth
# /root/iproute2/ip/ip link set veth0 up
# /root/iproute2/ip/ip link set veth1 up
== Load objs
# /root/iproute2/ip/ip link set veth0 xdp obj bpf_graft.o sec aaa
# /root/iproute2/ip/ip link show veth0
5: veth0@veth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 xdp qdisc noqueue state UP mode DEFAULT group default qlen 1000
link/ether 6a:e6:fa:2b:4e:1f brd ff:ff:ff:ff:ff:ff
prog/xdp id 4 tag 3056d2382e53f27c jited
# ls /sys/fs/bpf/xdp/globals
jmp_tc
# bpftool map show
1: prog_array name jmp_tc flags 0x0
key 4B value 4B max_entries 1 memlock 4096B
# bpftool prog show
4: xdp name cls_aaa tag 3056d2382e53f27c gpl
loaded_at 2020-10-22T08:04:21-0400 uid 0
xlated 80B jited 71B memlock 4096B
btf_id 5
# /root/iproute2/ip/ip link set veth0 xdp off
# /root/iproute2/ip/ip link set veth0 xdp obj bpf_map_in_map.o sec ingress
# /root/iproute2/ip/ip link show veth0
5: veth0@veth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 xdp qdisc noqueue state UP mode DEFAULT group default qlen 1000
link/ether 6a:e6:fa:2b:4e:1f brd ff:ff:ff:ff:ff:ff
prog/xdp id 8 tag 4420e72b2a601ed7 jited
# ls /sys/fs/bpf/xdp/globals
jmp_tc map_inner map_outer
# bpftool map show
1: prog_array name jmp_tc flags 0x0
key 4B value 4B max_entries 1 memlock 4096B
2: array name map_inner flags 0x0
key 4B value 4B max_entries 1 memlock 4096B
3: array_of_maps name map_outer flags 0x0
key 4B value 4B max_entries 1 memlock 4096B
# bpftool prog show
8: xdp name imain tag 4420e72b2a601ed7 gpl
loaded_at 2020-10-22T08:04:23-0400 uid 0
xlated 336B jited 193B memlock 4096B map_ids 3
btf_id 10
# /root/iproute2/ip/ip link set veth0 xdp off
# /root/iproute2/ip/ip link set veth0 xdp obj bpf_shared.o sec ingress
# /root/iproute2/ip/ip link show veth0
5: veth0@veth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 xdp qdisc noqueue state UP mode DEFAULT group default qlen 1000
link/ether 6a:e6:fa:2b:4e:1f brd ff:ff:ff:ff:ff:ff
prog/xdp id 12 tag 9cbab549c3af3eab jited
# ls /sys/fs/bpf/xdp/7a1422e90cd81478f97bc33fbd7782bcb3b868ef /sys/fs/bpf/xdp/globals
/sys/fs/bpf/xdp/7a1422e90cd81478f97bc33fbd7782bcb3b868ef:
map_sh
/sys/fs/bpf/xdp/globals:
jmp_tc map_inner map_outer
# bpftool map show
1: prog_array name jmp_tc flags 0x0
key 4B value 4B max_entries 1 memlock 4096B
2: array name map_inner flags 0x0
key 4B value 4B max_entries 1 memlock 4096B
3: array_of_maps name map_outer flags 0x0
key 4B value 4B max_entries 1 memlock 4096B
4: array name map_sh flags 0x0
key 4B value 4B max_entries 1 memlock 4096B
# bpftool prog show
12: xdp name imain tag 9cbab549c3af3eab gpl
loaded_at 2020-10-22T08:04:25-0400 uid 0
xlated 224B jited 139B memlock 4096B map_ids 4
btf_id 15
# /root/iproute2/ip/ip link set veth0 xdp off
== Load objs again to make sure maps could be reused
# /root/iproute2/ip/ip link set veth0 xdp obj bpf_graft.o sec aaa
# /root/iproute2/ip/ip link show veth0
5: veth0@veth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 xdp qdisc noqueue state UP mode DEFAULT group default qlen 1000
link/ether 6a:e6:fa:2b:4e:1f brd ff:ff:ff:ff:ff:ff
prog/xdp id 16 tag 3056d2382e53f27c jited
# ls /sys/fs/bpf/xdp/7a1422e90cd81478f97bc33fbd7782bcb3b868ef /sys/fs/bpf/xdp/globals
/sys/fs/bpf/xdp/7a1422e90cd81478f97bc33fbd7782bcb3b868ef:
map_sh
/sys/fs/bpf/xdp/globals:
jmp_tc map_inner map_outer
# bpftool map show
1: prog_array name jmp_tc flags 0x0
key 4B value 4B max_entries 1 memlock 4096B
2: array name map_inner flags 0x0
key 4B value 4B max_entries 1 memlock 4096B
3: array_of_maps name map_outer flags 0x0
key 4B value 4B max_entries 1 memlock 4096B
4: array name map_sh flags 0x0
key 4B value 4B max_entries 1 memlock 4096B
# bpftool prog show
16: xdp name cls_aaa tag 3056d2382e53f27c gpl
loaded_at 2020-10-22T08:04:27-0400 uid 0
xlated 80B jited 71B memlock 4096B
btf_id 20
# /root/iproute2/ip/ip link set veth0 xdp off
# /root/iproute2/ip/ip link set veth0 xdp obj bpf_map_in_map.o sec ingress
# /root/iproute2/ip/ip link show veth0
5: veth0@veth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 xdp qdisc noqueue state UP mode DEFAULT group default qlen 1000
link/ether 6a:e6:fa:2b:4e:1f brd ff:ff:ff:ff:ff:ff
prog/xdp id 20 tag 4420e72b2a601ed7 jited
# ls /sys/fs/bpf/xdp/7a1422e90cd81478f97bc33fbd7782bcb3b868ef /sys/fs/bpf/xdp/globals
/sys/fs/bpf/xdp/7a1422e90cd81478f97bc33fbd7782bcb3b868ef:
map_sh
/sys/fs/bpf/xdp/globals:
jmp_tc map_inner map_outer
# bpftool map show [236/4518]
1: prog_array name jmp_tc flags 0x0
key 4B value 4B max_entries 1 memlock 4096B
2: array name map_inner flags 0x0
key 4B value 4B max_entries 1 memlock 4096B
3: array_of_maps name map_outer flags 0x0
key 4B value 4B max_entries 1 memlock 4096B
4: array name map_sh flags 0x0
key 4B value 4B max_entries 1 memlock 4096B
# bpftool prog show
20: xdp name imain tag 4420e72b2a601ed7 gpl
loaded_at 2020-10-22T08:04:29-0400 uid 0
xlated 336B jited 193B memlock 4096B map_ids 3
btf_id 25
# /root/iproute2/ip/ip link set veth0 xdp off
# /root/iproute2/ip/ip link set veth0 xdp obj bpf_shared.o sec ingress
# /root/iproute2/ip/ip link show veth0
5: veth0@veth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 xdp qdisc noqueue state UP mode DEFAULT group default qlen 1000
link/ether 6a:e6:fa:2b:4e:1f brd ff:ff:ff:ff:ff:ff
prog/xdp id 24 tag 9cbab549c3af3eab jited
# ls /sys/fs/bpf/xdp/7a1422e90cd81478f97bc33fbd7782bcb3b868ef /sys/fs/bpf/xdp/globals
/sys/fs/bpf/xdp/7a1422e90cd81478f97bc33fbd7782bcb3b868ef:
map_sh
/sys/fs/bpf/xdp/globals:
jmp_tc map_inner map_outer
# bpftool map show
1: prog_array name jmp_tc flags 0x0
key 4B value 4B max_entries 1 memlock 4096B
2: array name map_inner flags 0x0
key 4B value 4B max_entries 1 memlock 4096B
3: array_of_maps name map_outer flags 0x0
key 4B value 4B max_entries 1 memlock 4096B
4: array name map_sh flags 0x0
key 4B value 4B max_entries 1 memlock 4096B
# bpftool prog show
24: xdp name imain tag 9cbab549c3af3eab gpl
loaded_at 2020-10-22T08:04:31-0400 uid 0
xlated 224B jited 139B memlock 4096B map_ids 4
btf_id 30
# /root/iproute2/ip/ip link set veth0 xdp off
# rm -rf /sys/fs/bpf/xdp/7a1422e90cd81478f97bc33fbd7782bcb3b868ef /sys/fs/bpf/xdp/globals
== Testing if we can load new-style objects (using xdp-filter as an example)
# /root/iproute2/ip/ip link set veth0 xdp obj /usr/lib64/bpf/xdpfilt_alw_all.o sec xdp_filter
# /root/iproute2/ip/ip link show veth0
5: veth0@veth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 xdp qdisc noqueue state UP mode DEFAULT group default qlen 1000
link/ether 6a:e6:fa:2b:4e:1f brd ff:ff:ff:ff:ff:ff
prog/xdp id 28 tag e29eeda1489a6520 jited
# ls /sys/fs/bpf/xdp/globals
filter_ethernet filter_ipv4 filter_ipv6 filter_ports xdp_stats_map
# bpftool map show
5: percpu_array name xdp_stats_map flags 0x0
key 4B value 16B max_entries 5 memlock 4096B
btf_id 35
6: percpu_array name filter_ports flags 0x0
key 4B value 8B max_entries 65536 memlock 1576960B
btf_id 35
7: percpu_hash name filter_ipv4 flags 0x0
key 4B value 8B max_entries 10000 memlock 1064960B
btf_id 35
8: percpu_hash name filter_ipv6 flags 0x0
key 16B value 8B max_entries 10000 memlock 1142784B
btf_id 35
9: percpu_hash name filter_ethernet flags 0x0
key 6B value 8B max_entries 10000 memlock 1064960B
btf_id 35
# bpftool prog show
28: xdp name xdpfilt_alw_all tag e29eeda1489a6520 gpl
loaded_at 2020-10-22T08:04:33-0400 uid 0
xlated 2408B jited 1405B memlock 4096B map_ids 9,5,7,8,6
btf_id 35
# /root/iproute2/ip/ip link set veth0 xdp off
# /root/iproute2/ip/ip link set veth0 xdp obj /usr/lib64/bpf/xdpfilt_alw_ip.o sec xdp_filter
# /root/iproute2/ip/ip link show veth0
5: veth0@veth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 xdp qdisc noqueue state UP mode DEFAULT group default qlen 1000
link/ether 6a:e6:fa:2b:4e:1f brd ff:ff:ff:ff:ff:ff
prog/xdp id 32 tag 2f2b9dbfb786a5a2 jited
# ls /sys/fs/bpf/xdp/globals
filter_ethernet filter_ipv4 filter_ipv6 filter_ports xdp_stats_map
# bpftool map show
5: percpu_array name xdp_stats_map flags 0x0
key 4B value 16B max_entries 5 memlock 4096B
btf_id 35
6: percpu_array name filter_ports flags 0x0
key 4B value 8B max_entries 65536 memlock 1576960B
btf_id 35
7: percpu_hash name filter_ipv4 flags 0x0
key 4B value 8B max_entries 10000 memlock 1064960B
btf_id 35
8: percpu_hash name filter_ipv6 flags 0x0
key 16B value 8B max_entries 10000 memlock 1142784B
btf_id 35
9: percpu_hash name filter_ethernet flags 0x0
key 6B value 8B max_entries 10000 memlock 1064960B
btf_id 35
# bpftool prog show
32: xdp name xdpfilt_alw_ip tag 2f2b9dbfb786a5a2 gpl
loaded_at 2020-10-22T08:04:35-0400 uid 0
xlated 1336B jited 778B memlock 4096B map_ids 7,8,5
btf_id 40
# /root/iproute2/ip/ip link set veth0 xdp off
# /root/iproute2/ip/ip link set veth0 xdp obj /usr/lib64/bpf/xdpfilt_alw_tcp.o sec xdp_filter
# /root/iproute2/ip/ip link show veth0
5: veth0@veth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 xdp qdisc noqueue state UP mode DEFAULT group default qlen 1000
link/ether 6a:e6:fa:2b:4e:1f brd ff:ff:ff:ff:ff:ff
prog/xdp id 36 tag 18c1bb25084030bc jited
# ls /sys/fs/bpf/xdp/globals
filter_ethernet filter_ipv4 filter_ipv6 filter_ports xdp_stats_map
# bpftool map show
5: percpu_array name xdp_stats_map flags 0x0
key 4B value 16B max_entries 5 memlock 4096B
btf_id 35
6: percpu_array name filter_ports flags 0x0
key 4B value 8B max_entries 65536 memlock 1576960B
btf_id 35
7: percpu_hash name filter_ipv4 flags 0x0
key 4B value 8B max_entries 10000 memlock 1064960B
btf_id 35
8: percpu_hash name filter_ipv6 flags 0x0
key 16B value 8B max_entries 10000 memlock 1142784B
btf_id 35
9: percpu_hash name filter_ethernet flags 0x0
key 6B value 8B max_entries 10000 memlock 1064960B
btf_id 35
# bpftool prog show
36: xdp name xdpfilt_alw_tcp tag 18c1bb25084030bc gpl
loaded_at 2020-10-22T08:04:37-0400 uid 0
xlated 1128B jited 690B memlock 4096B map_ids 6,5
btf_id 45
# /root/iproute2/ip/ip link set veth0 xdp off
# rm -rf /sys/fs/bpf/xdp/globals
== Load new btf defined maps
# /root/iproute2/ip/ip link set veth0 xdp obj btf_graft.o sec aaa
# /root/iproute2/ip/ip link show veth0
5: veth0@veth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 xdp qdisc noqueue state UP mode DEFAULT group default qlen 1000
link/ether 6a:e6:fa:2b:4e:1f brd ff:ff:ff:ff:ff:ff
prog/xdp id 40 tag 3056d2382e53f27c jited
# ls /sys/fs/bpf/xdp/globals
jmp_tc
# bpftool map show
10: prog_array name jmp_tc flags 0x0
key 4B value 4B max_entries 1 memlock 4096B
# bpftool prog show
40: xdp name cls_aaa tag 3056d2382e53f27c gpl
loaded_at 2020-10-22T08:04:39-0400 uid 0
xlated 80B jited 71B memlock 4096B
btf_id 50
# /root/iproute2/ip/ip link set veth0 xdp off
# /root/iproute2/ip/ip link set veth0 xdp obj btf_map_in_map.o sec ingress
# /root/iproute2/ip/ip link show veth0
5: veth0@veth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 xdp qdisc noqueue state UP mode DEFAULT group default qlen 1000
link/ether 6a:e6:fa:2b:4e:1f brd ff:ff:ff:ff:ff:ff
prog/xdp id 44 tag 4420e72b2a601ed7 jited
# ls /sys/fs/bpf/xdp/globals
jmp_tc map_outer
# bpftool map show
10: prog_array name jmp_tc flags 0x0
key 4B value 4B max_entries 1 memlock 4096B
11: array name map_inner flags 0x0
key 4B value 4B max_entries 1 memlock 4096B
13: array_of_maps name map_outer flags 0x0
key 4B value 4B max_entries 1 memlock 4096B
# bpftool prog show
44: xdp name imain tag 4420e72b2a601ed7 gpl
loaded_at 2020-10-22T08:04:41-0400 uid 0
xlated 336B jited 193B memlock 4096B map_ids 13
btf_id 55
# /root/iproute2/ip/ip link set veth0 xdp off
# /root/iproute2/ip/ip link set veth0 xdp obj btf_shared.o sec ingress
# /root/iproute2/ip/ip link show veth0
5: veth0@veth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 xdp qdisc noqueue state UP mode DEFAULT group default qlen 1000
link/ether 6a:e6:fa:2b:4e:1f brd ff:ff:ff:ff:ff:ff
prog/xdp id 48 tag 9cbab549c3af3eab jited
# ls /sys/fs/bpf/xdp/globals
jmp_tc map_outer map_sh
# bpftool map show
10: prog_array name jmp_tc flags 0x0
key 4B value 4B max_entries 1 memlock 4096B
11: array name map_inner flags 0x0
key 4B value 4B max_entries 1 memlock 4096B
13: array_of_maps name map_outer flags 0x0
key 4B value 4B max_entries 1 memlock 4096B
14: array name map_sh flags 0x0
key 4B value 4B max_entries 1 memlock 4096B
# bpftool prog show
48: xdp name imain tag 9cbab549c3af3eab gpl
loaded_at 2020-10-22T08:04:43-0400 uid 0
xlated 224B jited 139B memlock 4096B map_ids 14
btf_id 60
# /root/iproute2/ip/ip link set veth0 xdp off
# rm -rf /sys/fs/bpf/xdp/globals
== Test load objs by tc
# /root/iproute2/tc/tc qdisc add dev veth0 ingress
# /root/iproute2/tc/tc filter add dev veth0 ingress bpf da obj bpf_cyclic.o sec 0xabccba/0
# /root/iproute2/tc/tc filter add dev veth0 parent ffff: bpf obj bpf_graft.o
# /root/iproute2/tc/tc filter add dev veth0 ingress bpf da obj bpf_tailcall.o sec 42/0
# /root/iproute2/tc/tc filter add dev veth0 ingress bpf da obj bpf_tailcall.o sec 42/1
# /root/iproute2/tc/tc filter add dev veth0 ingress bpf da obj bpf_tailcall.o sec 43/0
# /root/iproute2/tc/tc filter add dev veth0 ingress bpf da obj bpf_tailcall.o sec classifier
# /root/iproute2/ip/ip link show veth0
5: veth0@veth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000
link/ether 6a:e6:fa:2b:4e:1f brd ff:ff:ff:ff:ff:ff
# ls /sys/fs/bpf/xdp/37e88cb3b9646b2ea5f99ab31069ad88db06e73d /sys/fs/bpf/xdp/fc68fe3e96378a0cba284ea6acbe17e898d8b11f /sys/fs/bpf/xdp/globals
/sys/fs/bpf/xdp/37e88cb3b9646b2ea5f99ab31069ad88db06e73d:
jmp_tc
/sys/fs/bpf/xdp/fc68fe3e96378a0cba284ea6acbe17e898d8b11f:
jmp_ex jmp_tc map_sh
/sys/fs/bpf/xdp/globals:
jmp_tc
# bpftool map show
15: prog_array name jmp_tc flags 0x0
key 4B value 4B max_entries 1 memlock 4096B
owner_prog_type sched_cls owner jited
16: prog_array name jmp_tc flags 0x0
key 4B value 4B max_entries 1 memlock 4096B
owner_prog_type sched_cls owner jited
17: prog_array name jmp_ex flags 0x0
key 4B value 4B max_entries 1 memlock 4096B
owner_prog_type sched_cls owner jited
18: prog_array name jmp_tc flags 0x0
key 4B value 4B max_entries 2 memlock 4096B
owner_prog_type sched_cls owner jited
19: array name map_sh flags 0x0
key 4B value 4B max_entries 1 memlock 4096B
# bpftool prog show
52: sched_cls name cls_loop tag 3e98a40b04099d36 gpl
loaded_at 2020-10-22T08:04:45-0400 uid 0
xlated 168B jited 133B memlock 4096B map_ids 15
btf_id 65
56: sched_cls name cls_entry tag 0fbb4d9310a6ee26 gpl
loaded_at 2020-10-22T08:04:45-0400 uid 0
xlated 144B jited 121B memlock 4096B map_ids 16
btf_id 70
60: sched_cls name cls_case1 tag e06a3bd62293d65d gpl
loaded_at 2020-10-22T08:04:45-0400 uid 0
xlated 328B jited 216B memlock 4096B map_ids 19,17
btf_id 75
66: sched_cls name cls_case1 tag e06a3bd62293d65d gpl
loaded_at 2020-10-22T08:04:45-0400 uid 0
xlated 328B jited 216B memlock 4096B map_ids 19,17
btf_id 80
72: sched_cls name cls_case1 tag e06a3bd62293d65d gpl
loaded_at 2020-10-22T08:04:45-0400 uid 0
xlated 328B jited 216B memlock 4096B map_ids 19,17
btf_id 85
78: sched_cls name cls_case1 tag e06a3bd62293d65d gpl
loaded_at 2020-10-22T08:04:45-0400 uid 0
xlated 328B jited 216B memlock 4096B map_ids 19,17
btf_id 90
79: sched_cls name cls_case2 tag ee218ff893dca823 gpl
loaded_at 2020-10-22T08:04:45-0400 uid 0
xlated 336B jited 218B memlock 4096B map_ids 19,18
btf_id 90
80: sched_cls name cls_exit tag e78a58140deed387 gpl
loaded_at 2020-10-22T08:04:45-0400 uid 0
xlated 288B jited 177B memlock 4096B map_ids 19
btf_id 90
I also run the following upstream kselftest with patches iproute2 and
all passed.
test_lwt_ip_encap.sh
test_xdp_redirect.sh
test_tc_redirect.sh
test_xdp_meta.sh
test_xdp_veth.sh
test_xdp_vlan.sh
Hangbin Liu (5):
configure: add check_libbpf() for later libbpf support
lib: rename bpf.c to bpf_legacy.c
lib: add libbpf support
examples/bpf: move struct bpf_elf_map defined maps to legacy folder
examples/bpf: add bpf examples with BTF defined maps
configure | 108 +++++++
examples/bpf/README | 18 +-
examples/bpf/bpf_graft.c | 14 +-
examples/bpf/bpf_map_in_map.c | 37 ++-
examples/bpf/bpf_shared.c | 14 +-
examples/bpf/{ => legacy}/bpf_cyclic.c | 2 +-
examples/bpf/legacy/bpf_graft.c | 66 +++++
examples/bpf/legacy/bpf_map_in_map.c | 56 ++++
examples/bpf/legacy/bpf_shared.c | 53 ++++
examples/bpf/{ => legacy}/bpf_tailcall.c | 2 +-
include/bpf_api.h | 13 +
include/bpf_util.h | 21 +-
ip/ipvrf.c | 6 +-
lib/Makefile | 6 +-
lib/bpf_glue.c | 35 +++
lib/{bpf.c => bpf_legacy.c} | 193 ++++++++++++-
lib/bpf_libbpf.c | 353 +++++++++++++++++++++++
17 files changed, 939 insertions(+), 58 deletions(-)
rename examples/bpf/{ => legacy}/bpf_cyclic.c (95%)
create mode 100644 examples/bpf/legacy/bpf_graft.c
create mode 100644 examples/bpf/legacy/bpf_map_in_map.c
create mode 100644 examples/bpf/legacy/bpf_shared.c
rename examples/bpf/{ => legacy}/bpf_tailcall.c (98%)
create mode 100644 lib/bpf_glue.c
rename lib/{bpf.c => bpf_legacy.c} (94%)
create mode 100644 lib/bpf_libbpf.c
This series converts iproute2 to use libbpf for loading and attaching BPF programs when it is available. This means that iproute2 will correctly process BTF information and support the new-style BTF-defined maps, while keeping compatibility with the old internal map definition syntax. This is achieved by checking for libbpf at './configure' time, and using it if available. By default the system libbpf will be used, but static linking against a custom libbpf version can be achieved by passing LIBBPF_DIR to configure. LIBBPF_FORCE can be set to on to force configure abort if no suitable libbpf is found (useful for automatic packaging that wants to enforce the dependency), or set off to disable libbpf check and build iproute2 with legacy bpf. The old iproute2 bpf code is kept and will be used if no suitable libbpf is available. When using libbpf, wrapper code ensures that iproute2 will still understand the old map definition format, including populating map-in-map and tail call maps before load. The examples in bpf/examples are kept, and a separate set of examples are added with BTF-based map definitions for those examples where this is possible (libbpf doesn't currently support declaratively populating tail call maps). At last, Thanks a lot for Toke's help on this patch set. v4: a) Make variable LIBBPF_FORCE able to control whether build iproute2 with libbpf or not. b) Add new file bpf_glue.c to for libbpf/legacy mixed bpf calls. c) Fix some build issues and shell compatibility error. v3: a) Update configure to Check function bpf_program__section_name() separately b) Add a new function get_bpf_program__section_name() to choose whether to use bpf_program__title() or not. c) Test build the patch on Fedora 33 with libbpf-0.1.0-1.fc33 and libbpf-devel-0.1.0-1.fc33 v2: a) Remove self defined IS_ERR_OR_NULL and use libbpf_get_error() instead. b) Add ipvrf with libbpf support. Here are the test results with patched iproute2: == setup env # clang -O2 -Wall -g -target bpf -c bpf_graft.c -o btf_graft.o # clang -O2 -Wall -g -target bpf -c bpf_map_in_map.c -o btf_map_in_map.o # clang -O2 -Wall -g -target bpf -c bpf_shared.c -o btf_shared.o # clang -O2 -Wall -g -target bpf -c legacy/bpf_cyclic.c -o bpf_cyclic.o # clang -O2 -Wall -g -target bpf -c legacy/bpf_graft.c -o bpf_graft.o # clang -O2 -Wall -g -target bpf -c legacy/bpf_map_in_map.c -o bpf_map_in_map.o # clang -O2 -Wall -g -target bpf -c legacy/bpf_shared.c -o bpf_shared.o # clang -O2 -Wall -g -target bpf -c legacy/bpf_tailcall.c -o bpf_tailcall.o # rm -rf /sys/fs/bpf/xdp/globals # /root/iproute2/ip/ip link add type veth # /root/iproute2/ip/ip link set veth0 up # /root/iproute2/ip/ip link set veth1 up == Load objs # /root/iproute2/ip/ip link set veth0 xdp obj bpf_graft.o sec aaa # /root/iproute2/ip/ip link show veth0 5: veth0@veth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 xdp qdisc noqueue state UP mode DEFAULT group default qlen 1000 link/ether 6a:e6:fa:2b:4e:1f brd ff:ff:ff:ff:ff:ff prog/xdp id 4 tag 3056d2382e53f27c jited # ls /sys/fs/bpf/xdp/globals jmp_tc # bpftool map show 1: prog_array name jmp_tc flags 0x0 key 4B value 4B max_entries 1 memlock 4096B # bpftool prog show 4: xdp name cls_aaa tag 3056d2382e53f27c gpl loaded_at 2020-10-22T08:04:21-0400 uid 0 xlated 80B jited 71B memlock 4096B btf_id 5 # /root/iproute2/ip/ip link set veth0 xdp off # /root/iproute2/ip/ip link set veth0 xdp obj bpf_map_in_map.o sec ingress # /root/iproute2/ip/ip link show veth0 5: veth0@veth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 xdp qdisc noqueue state UP mode DEFAULT group default qlen 1000 link/ether 6a:e6:fa:2b:4e:1f brd ff:ff:ff:ff:ff:ff prog/xdp id 8 tag 4420e72b2a601ed7 jited # ls /sys/fs/bpf/xdp/globals jmp_tc map_inner map_outer # bpftool map show 1: prog_array name jmp_tc flags 0x0 key 4B value 4B max_entries 1 memlock 4096B 2: array name map_inner flags 0x0 key 4B value 4B max_entries 1 memlock 4096B 3: array_of_maps name map_outer flags 0x0 key 4B value 4B max_entries 1 memlock 4096B # bpftool prog show 8: xdp name imain tag 4420e72b2a601ed7 gpl loaded_at 2020-10-22T08:04:23-0400 uid 0 xlated 336B jited 193B memlock 4096B map_ids 3 btf_id 10 # /root/iproute2/ip/ip link set veth0 xdp off # /root/iproute2/ip/ip link set veth0 xdp obj bpf_shared.o sec ingress # /root/iproute2/ip/ip link show veth0 5: veth0@veth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 xdp qdisc noqueue state UP mode DEFAULT group default qlen 1000 link/ether 6a:e6:fa:2b:4e:1f brd ff:ff:ff:ff:ff:ff prog/xdp id 12 tag 9cbab549c3af3eab jited # ls /sys/fs/bpf/xdp/7a1422e90cd81478f97bc33fbd7782bcb3b868ef /sys/fs/bpf/xdp/globals /sys/fs/bpf/xdp/7a1422e90cd81478f97bc33fbd7782bcb3b868ef: map_sh /sys/fs/bpf/xdp/globals: jmp_tc map_inner map_outer # bpftool map show 1: prog_array name jmp_tc flags 0x0 key 4B value 4B max_entries 1 memlock 4096B 2: array name map_inner flags 0x0 key 4B value 4B max_entries 1 memlock 4096B 3: array_of_maps name map_outer flags 0x0 key 4B value 4B max_entries 1 memlock 4096B 4: array name map_sh flags 0x0 key 4B value 4B max_entries 1 memlock 4096B # bpftool prog show 12: xdp name imain tag 9cbab549c3af3eab gpl loaded_at 2020-10-22T08:04:25-0400 uid 0 xlated 224B jited 139B memlock 4096B map_ids 4 btf_id 15 # /root/iproute2/ip/ip link set veth0 xdp off == Load objs again to make sure maps could be reused # /root/iproute2/ip/ip link set veth0 xdp obj bpf_graft.o sec aaa # /root/iproute2/ip/ip link show veth0 5: veth0@veth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 xdp qdisc noqueue state UP mode DEFAULT group default qlen 1000 link/ether 6a:e6:fa:2b:4e:1f brd ff:ff:ff:ff:ff:ff prog/xdp id 16 tag 3056d2382e53f27c jited # ls /sys/fs/bpf/xdp/7a1422e90cd81478f97bc33fbd7782bcb3b868ef /sys/fs/bpf/xdp/globals /sys/fs/bpf/xdp/7a1422e90cd81478f97bc33fbd7782bcb3b868ef: map_sh /sys/fs/bpf/xdp/globals: jmp_tc map_inner map_outer # bpftool map show 1: prog_array name jmp_tc flags 0x0 key 4B value 4B max_entries 1 memlock 4096B 2: array name map_inner flags 0x0 key 4B value 4B max_entries 1 memlock 4096B 3: array_of_maps name map_outer flags 0x0 key 4B value 4B max_entries 1 memlock 4096B 4: array name map_sh flags 0x0 key 4B value 4B max_entries 1 memlock 4096B # bpftool prog show 16: xdp name cls_aaa tag 3056d2382e53f27c gpl loaded_at 2020-10-22T08:04:27-0400 uid 0 xlated 80B jited 71B memlock 4096B btf_id 20 # /root/iproute2/ip/ip link set veth0 xdp off # /root/iproute2/ip/ip link set veth0 xdp obj bpf_map_in_map.o sec ingress # /root/iproute2/ip/ip link show veth0 5: veth0@veth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 xdp qdisc noqueue state UP mode DEFAULT group default qlen 1000 link/ether 6a:e6:fa:2b:4e:1f brd ff:ff:ff:ff:ff:ff prog/xdp id 20 tag 4420e72b2a601ed7 jited # ls /sys/fs/bpf/xdp/7a1422e90cd81478f97bc33fbd7782bcb3b868ef /sys/fs/bpf/xdp/globals /sys/fs/bpf/xdp/7a1422e90cd81478f97bc33fbd7782bcb3b868ef: map_sh /sys/fs/bpf/xdp/globals: jmp_tc map_inner map_outer # bpftool map show [236/4518] 1: prog_array name jmp_tc flags 0x0 key 4B value 4B max_entries 1 memlock 4096B 2: array name map_inner flags 0x0 key 4B value 4B max_entries 1 memlock 4096B 3: array_of_maps name map_outer flags 0x0 key 4B value 4B max_entries 1 memlock 4096B 4: array name map_sh flags 0x0 key 4B value 4B max_entries 1 memlock 4096B # bpftool prog show 20: xdp name imain tag 4420e72b2a601ed7 gpl loaded_at 2020-10-22T08:04:29-0400 uid 0 xlated 336B jited 193B memlock 4096B map_ids 3 btf_id 25 # /root/iproute2/ip/ip link set veth0 xdp off # /root/iproute2/ip/ip link set veth0 xdp obj bpf_shared.o sec ingress # /root/iproute2/ip/ip link show veth0 5: veth0@veth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 xdp qdisc noqueue state UP mode DEFAULT group default qlen 1000 link/ether 6a:e6:fa:2b:4e:1f brd ff:ff:ff:ff:ff:ff prog/xdp id 24 tag 9cbab549c3af3eab jited # ls /sys/fs/bpf/xdp/7a1422e90cd81478f97bc33fbd7782bcb3b868ef /sys/fs/bpf/xdp/globals /sys/fs/bpf/xdp/7a1422e90cd81478f97bc33fbd7782bcb3b868ef: map_sh /sys/fs/bpf/xdp/globals: jmp_tc map_inner map_outer # bpftool map show 1: prog_array name jmp_tc flags 0x0 key 4B value 4B max_entries 1 memlock 4096B 2: array name map_inner flags 0x0 key 4B value 4B max_entries 1 memlock 4096B 3: array_of_maps name map_outer flags 0x0 key 4B value 4B max_entries 1 memlock 4096B 4: array name map_sh flags 0x0 key 4B value 4B max_entries 1 memlock 4096B # bpftool prog show 24: xdp name imain tag 9cbab549c3af3eab gpl loaded_at 2020-10-22T08:04:31-0400 uid 0 xlated 224B jited 139B memlock 4096B map_ids 4 btf_id 30 # /root/iproute2/ip/ip link set veth0 xdp off # rm -rf /sys/fs/bpf/xdp/7a1422e90cd81478f97bc33fbd7782bcb3b868ef /sys/fs/bpf/xdp/globals == Testing if we can load new-style objects (using xdp-filter as an example) # /root/iproute2/ip/ip link set veth0 xdp obj /usr/lib64/bpf/xdpfilt_alw_all.o sec xdp_filter # /root/iproute2/ip/ip link show veth0 5: veth0@veth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 xdp qdisc noqueue state UP mode DEFAULT group default qlen 1000 link/ether 6a:e6:fa:2b:4e:1f brd ff:ff:ff:ff:ff:ff prog/xdp id 28 tag e29eeda1489a6520 jited # ls /sys/fs/bpf/xdp/globals filter_ethernet filter_ipv4 filter_ipv6 filter_ports xdp_stats_map # bpftool map show 5: percpu_array name xdp_stats_map flags 0x0 key 4B value 16B max_entries 5 memlock 4096B btf_id 35 6: percpu_array name filter_ports flags 0x0 key 4B value 8B max_entries 65536 memlock 1576960B btf_id 35 7: percpu_hash name filter_ipv4 flags 0x0 key 4B value 8B max_entries 10000 memlock 1064960B btf_id 35 8: percpu_hash name filter_ipv6 flags 0x0 key 16B value 8B max_entries 10000 memlock 1142784B btf_id 35 9: percpu_hash name filter_ethernet flags 0x0 key 6B value 8B max_entries 10000 memlock 1064960B btf_id 35 # bpftool prog show 28: xdp name xdpfilt_alw_all tag e29eeda1489a6520 gpl loaded_at 2020-10-22T08:04:33-0400 uid 0 xlated 2408B jited 1405B memlock 4096B map_ids 9,5,7,8,6 btf_id 35 # /root/iproute2/ip/ip link set veth0 xdp off # /root/iproute2/ip/ip link set veth0 xdp obj /usr/lib64/bpf/xdpfilt_alw_ip.o sec xdp_filter # /root/iproute2/ip/ip link show veth0 5: veth0@veth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 xdp qdisc noqueue state UP mode DEFAULT group default qlen 1000 link/ether 6a:e6:fa:2b:4e:1f brd ff:ff:ff:ff:ff:ff prog/xdp id 32 tag 2f2b9dbfb786a5a2 jited # ls /sys/fs/bpf/xdp/globals filter_ethernet filter_ipv4 filter_ipv6 filter_ports xdp_stats_map # bpftool map show 5: percpu_array name xdp_stats_map flags 0x0 key 4B value 16B max_entries 5 memlock 4096B btf_id 35 6: percpu_array name filter_ports flags 0x0 key 4B value 8B max_entries 65536 memlock 1576960B btf_id 35 7: percpu_hash name filter_ipv4 flags 0x0 key 4B value 8B max_entries 10000 memlock 1064960B btf_id 35 8: percpu_hash name filter_ipv6 flags 0x0 key 16B value 8B max_entries 10000 memlock 1142784B btf_id 35 9: percpu_hash name filter_ethernet flags 0x0 key 6B value 8B max_entries 10000 memlock 1064960B btf_id 35 # bpftool prog show 32: xdp name xdpfilt_alw_ip tag 2f2b9dbfb786a5a2 gpl loaded_at 2020-10-22T08:04:35-0400 uid 0 xlated 1336B jited 778B memlock 4096B map_ids 7,8,5 btf_id 40 # /root/iproute2/ip/ip link set veth0 xdp off # /root/iproute2/ip/ip link set veth0 xdp obj /usr/lib64/bpf/xdpfilt_alw_tcp.o sec xdp_filter # /root/iproute2/ip/ip link show veth0 5: veth0@veth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 xdp qdisc noqueue state UP mode DEFAULT group default qlen 1000 link/ether 6a:e6:fa:2b:4e:1f brd ff:ff:ff:ff:ff:ff prog/xdp id 36 tag 18c1bb25084030bc jited # ls /sys/fs/bpf/xdp/globals filter_ethernet filter_ipv4 filter_ipv6 filter_ports xdp_stats_map # bpftool map show 5: percpu_array name xdp_stats_map flags 0x0 key 4B value 16B max_entries 5 memlock 4096B btf_id 35 6: percpu_array name filter_ports flags 0x0 key 4B value 8B max_entries 65536 memlock 1576960B btf_id 35 7: percpu_hash name filter_ipv4 flags 0x0 key 4B value 8B max_entries 10000 memlock 1064960B btf_id 35 8: percpu_hash name filter_ipv6 flags 0x0 key 16B value 8B max_entries 10000 memlock 1142784B btf_id 35 9: percpu_hash name filter_ethernet flags 0x0 key 6B value 8B max_entries 10000 memlock 1064960B btf_id 35 # bpftool prog show 36: xdp name xdpfilt_alw_tcp tag 18c1bb25084030bc gpl loaded_at 2020-10-22T08:04:37-0400 uid 0 xlated 1128B jited 690B memlock 4096B map_ids 6,5 btf_id 45 # /root/iproute2/ip/ip link set veth0 xdp off # rm -rf /sys/fs/bpf/xdp/globals == Load new btf defined maps # /root/iproute2/ip/ip link set veth0 xdp obj btf_graft.o sec aaa # /root/iproute2/ip/ip link show veth0 5: veth0@veth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 xdp qdisc noqueue state UP mode DEFAULT group default qlen 1000 link/ether 6a:e6:fa:2b:4e:1f brd ff:ff:ff:ff:ff:ff prog/xdp id 40 tag 3056d2382e53f27c jited # ls /sys/fs/bpf/xdp/globals jmp_tc # bpftool map show 10: prog_array name jmp_tc flags 0x0 key 4B value 4B max_entries 1 memlock 4096B # bpftool prog show 40: xdp name cls_aaa tag 3056d2382e53f27c gpl loaded_at 2020-10-22T08:04:39-0400 uid 0 xlated 80B jited 71B memlock 4096B btf_id 50 # /root/iproute2/ip/ip link set veth0 xdp off # /root/iproute2/ip/ip link set veth0 xdp obj btf_map_in_map.o sec ingress # /root/iproute2/ip/ip link show veth0 5: veth0@veth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 xdp qdisc noqueue state UP mode DEFAULT group default qlen 1000 link/ether 6a:e6:fa:2b:4e:1f brd ff:ff:ff:ff:ff:ff prog/xdp id 44 tag 4420e72b2a601ed7 jited # ls /sys/fs/bpf/xdp/globals jmp_tc map_outer # bpftool map show 10: prog_array name jmp_tc flags 0x0 key 4B value 4B max_entries 1 memlock 4096B 11: array name map_inner flags 0x0 key 4B value 4B max_entries 1 memlock 4096B 13: array_of_maps name map_outer flags 0x0 key 4B value 4B max_entries 1 memlock 4096B # bpftool prog show 44: xdp name imain tag 4420e72b2a601ed7 gpl loaded_at 2020-10-22T08:04:41-0400 uid 0 xlated 336B jited 193B memlock 4096B map_ids 13 btf_id 55 # /root/iproute2/ip/ip link set veth0 xdp off # /root/iproute2/ip/ip link set veth0 xdp obj btf_shared.o sec ingress # /root/iproute2/ip/ip link show veth0 5: veth0@veth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 xdp qdisc noqueue state UP mode DEFAULT group default qlen 1000 link/ether 6a:e6:fa:2b:4e:1f brd ff:ff:ff:ff:ff:ff prog/xdp id 48 tag 9cbab549c3af3eab jited # ls /sys/fs/bpf/xdp/globals jmp_tc map_outer map_sh # bpftool map show 10: prog_array name jmp_tc flags 0x0 key 4B value 4B max_entries 1 memlock 4096B 11: array name map_inner flags 0x0 key 4B value 4B max_entries 1 memlock 4096B 13: array_of_maps name map_outer flags 0x0 key 4B value 4B max_entries 1 memlock 4096B 14: array name map_sh flags 0x0 key 4B value 4B max_entries 1 memlock 4096B # bpftool prog show 48: xdp name imain tag 9cbab549c3af3eab gpl loaded_at 2020-10-22T08:04:43-0400 uid 0 xlated 224B jited 139B memlock 4096B map_ids 14 btf_id 60 # /root/iproute2/ip/ip link set veth0 xdp off # rm -rf /sys/fs/bpf/xdp/globals == Test load objs by tc # /root/iproute2/tc/tc qdisc add dev veth0 ingress # /root/iproute2/tc/tc filter add dev veth0 ingress bpf da obj bpf_cyclic.o sec 0xabccba/0 # /root/iproute2/tc/tc filter add dev veth0 parent ffff: bpf obj bpf_graft.o # /root/iproute2/tc/tc filter add dev veth0 ingress bpf da obj bpf_tailcall.o sec 42/0 # /root/iproute2/tc/tc filter add dev veth0 ingress bpf da obj bpf_tailcall.o sec 42/1 # /root/iproute2/tc/tc filter add dev veth0 ingress bpf da obj bpf_tailcall.o sec 43/0 # /root/iproute2/tc/tc filter add dev veth0 ingress bpf da obj bpf_tailcall.o sec classifier # /root/iproute2/ip/ip link show veth0 5: veth0@veth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000 link/ether 6a:e6:fa:2b:4e:1f brd ff:ff:ff:ff:ff:ff # ls /sys/fs/bpf/xdp/37e88cb3b9646b2ea5f99ab31069ad88db06e73d /sys/fs/bpf/xdp/fc68fe3e96378a0cba284ea6acbe17e898d8b11f /sys/fs/bpf/xdp/globals /sys/fs/bpf/xdp/37e88cb3b9646b2ea5f99ab31069ad88db06e73d: jmp_tc /sys/fs/bpf/xdp/fc68fe3e96378a0cba284ea6acbe17e898d8b11f: jmp_ex jmp_tc map_sh /sys/fs/bpf/xdp/globals: jmp_tc # bpftool map show 15: prog_array name jmp_tc flags 0x0 key 4B value 4B max_entries 1 memlock 4096B owner_prog_type sched_cls owner jited 16: prog_array name jmp_tc flags 0x0 key 4B value 4B max_entries 1 memlock 4096B owner_prog_type sched_cls owner jited 17: prog_array name jmp_ex flags 0x0 key 4B value 4B max_entries 1 memlock 4096B owner_prog_type sched_cls owner jited 18: prog_array name jmp_tc flags 0x0 key 4B value 4B max_entries 2 memlock 4096B owner_prog_type sched_cls owner jited 19: array name map_sh flags 0x0 key 4B value 4B max_entries 1 memlock 4096B # bpftool prog show 52: sched_cls name cls_loop tag 3e98a40b04099d36 gpl loaded_at 2020-10-22T08:04:45-0400 uid 0 xlated 168B jited 133B memlock 4096B map_ids 15 btf_id 65 56: sched_cls name cls_entry tag 0fbb4d9310a6ee26 gpl loaded_at 2020-10-22T08:04:45-0400 uid 0 xlated 144B jited 121B memlock 4096B map_ids 16 btf_id 70 60: sched_cls name cls_case1 tag e06a3bd62293d65d gpl loaded_at 2020-10-22T08:04:45-0400 uid 0 xlated 328B jited 216B memlock 4096B map_ids 19,17 btf_id 75 66: sched_cls name cls_case1 tag e06a3bd62293d65d gpl loaded_at 2020-10-22T08:04:45-0400 uid 0 xlated 328B jited 216B memlock 4096B map_ids 19,17 btf_id 80 72: sched_cls name cls_case1 tag e06a3bd62293d65d gpl loaded_at 2020-10-22T08:04:45-0400 uid 0 xlated 328B jited 216B memlock 4096B map_ids 19,17 btf_id 85 78: sched_cls name cls_case1 tag e06a3bd62293d65d gpl loaded_at 2020-10-22T08:04:45-0400 uid 0 xlated 328B jited 216B memlock 4096B map_ids 19,17 btf_id 90 79: sched_cls name cls_case2 tag ee218ff893dca823 gpl loaded_at 2020-10-22T08:04:45-0400 uid 0 xlated 336B jited 218B memlock 4096B map_ids 19,18 btf_id 90 80: sched_cls name cls_exit tag e78a58140deed387 gpl loaded_at 2020-10-22T08:04:45-0400 uid 0 xlated 288B jited 177B memlock 4096B map_ids 19 btf_id 90 I also run the following upstream kselftest with patches iproute2 and all passed. test_lwt_ip_encap.sh test_xdp_redirect.sh test_tc_redirect.sh test_xdp_meta.sh test_xdp_veth.sh test_xdp_vlan.sh Hangbin Liu (5): configure: add check_libbpf() for later libbpf support lib: rename bpf.c to bpf_legacy.c lib: add libbpf support examples/bpf: move struct bpf_elf_map defined maps to legacy folder examples/bpf: add bpf examples with BTF defined maps configure | 108 +++++++ examples/bpf/README | 18 +- examples/bpf/bpf_graft.c | 14 +- examples/bpf/bpf_map_in_map.c | 37 ++- examples/bpf/bpf_shared.c | 14 +- examples/bpf/{ => legacy}/bpf_cyclic.c | 2 +- examples/bpf/legacy/bpf_graft.c | 66 +++++ examples/bpf/legacy/bpf_map_in_map.c | 56 ++++ examples/bpf/legacy/bpf_shared.c | 53 ++++ examples/bpf/{ => legacy}/bpf_tailcall.c | 2 +- include/bpf_api.h | 13 + include/bpf_util.h | 21 +- ip/ipvrf.c | 6 +- lib/Makefile | 6 +- lib/bpf_glue.c | 35 +++ lib/{bpf.c => bpf_legacy.c} | 193 ++++++++++++- lib/bpf_libbpf.c | 353 +++++++++++++++++++++++ 17 files changed, 939 insertions(+), 58 deletions(-) rename examples/bpf/{ => legacy}/bpf_cyclic.c (95%) create mode 100644 examples/bpf/legacy/bpf_graft.c create mode 100644 examples/bpf/legacy/bpf_map_in_map.c create mode 100644 examples/bpf/legacy/bpf_shared.c rename examples/bpf/{ => legacy}/bpf_tailcall.c (98%) create mode 100644 lib/bpf_glue.c rename lib/{bpf.c => bpf_legacy.c} (94%) create mode 100644 lib/bpf_libbpf.c