BPF Features by Linux Kernel Version

eBPF support

Kernel version	Commit
3.15	`bd4cf0ed331a`

JIT compiling

The list of supported architectures for your kernel can be retrieved with:

git grep HAVE_EBPF_JIT arch/

Feature / Architecture	Kernel version	Commit
x86_64	3.16	`622582786c9e`
ARM64	3.18	`e54bcde3d69d`
s390	4.1	`054623105728`
Constant blinding for JIT machines	4.7	`4f3446bb809f`
PowerPC64	4.8	`156d0e290e96`
Constant blinding - PowerPC64	4.9	`b7b7013cac55`
Sparc64	4.12	`7a12b5031c6b`
MIPS	4.13	`f381bf6d82f0`
ARM32	4.14	`39c13c204bb1`
x86_32	4.18	`03f5781be2c7`

Main features

Several (but not all) of these main features translate to an eBPF program type. The list of such program types supported in your kernel can be found in file include/uapi/linux/bpf.h:

git grep -W 'bpf_prog_type {' include/uapi/linux/bpf.h

Feature	Kernel version	Commit
`AF_PACKET` (libpcap/tcpdump, `cls_bpf` classifier, netfilter‘s `xt_bpf`, team driver’s load-balancing mode…)	3.15	`bd4cf0ed331a`
Kernel helpers	3.15	`bd4cf0ed331a`
`bpf()` syscall	3.18	`99c55f7d47c0`
Tables (a.k.a. Maps; details below)	3.18	`99c55f7d47c0`
BPF attached to sockets	3.19	`89aa075832b0`
BPF attached to `kprobes`	4.1	`2541517c32be`
`cls_bpf` / `act_bpf` for `tc`	4.1	`e2e9b6541dd4`
Tail calls	4.2	`04fd61ab36ec`
Non-root programs on sockets	4.4	`1be7f75d1668`
Persistent maps and programs (virtual FS)	4.4	`b2197755b263`
`tc`'s `direct-action` (`da`) mode	4.4	`045efa82ff56`
`tc`'s `clsact` qdisc	4.5	`1f211a1b929c`
BPF attached to tracepoints	4.7	`98b5c2c65c29`
Direct packet access	4.7	`969bf05eb3ce`
XDP (see below)	4.8	`6a773a15a1e8`
BPF attached to perf events	4.9	`0515e5999a46`
Hardware offload for `tc`'s `cls_bpf`	4.9	`332ae8e2f6ec`
Verifier exposure and internal hooks	4.9	`13a27dfc6697`
BPF attached to cgroups for socket filtering	4.10	`0e33661de493`
Lightweight tunnel encapsulation	4.10	`3a0af8fd61f9`
eBPF support for `xt_bpf` module (iptables)	4.10	`2c16d6033264`
BPF program tag	4.10	`7bd509e311f4`
Tracepoints to debug BPF	4.11 (removed in 4.18)	`a67edbf4fb6d` `4d220ed0f814`
Testing / benchmarking BPF programs	4.12	`1cf1cae963c2`
BPF programs and maps IDs	4.13	`dc4bb0e23561`
BPF support for `sock_ops`	4.13	`40304b2a1567`
BPF support for skbs on sockets	4.14	`b005fd189cec`
bpftool utility in kernel sources	4.15	`71bb428fe2c1`
BPF attached to cgroups as device controller	4.15	`ebc614f68736`
bpf2bpf function calls	4.16	`cc8b0b92a169`
BPF used for monitoring socket RX/TX data	4.17	`4f738adba30a`
BPF attached to raw tracepoints	4.17	`c4f6699dfcb8`
BPF attached to `bind()` system call	4.17	`4fbac77d2d09`
BPF Type Format (BTF)	4.18	`69b693f0aefa`
AF_XDP	4.18	`fbfc504a24f5`
bpfilter	4.18	`d2ba09c17a06`
End.BPF action for seg6local LWT	4.18	`004d4b274e2a`
BPF attached to LIRC devices	4.18	`f4364dcfc86d`

Tables (a.k.a. Maps)

The list of map types supported in your kernel can be found in file include/uapi/linux/bpf.h:

git grep -W 'bpf_map_type {' include/uapi/linux/bpf.h

Table type	Kernel version	Commit
Hash	3.19	`0f8e4bd8a1fc`
Array	3.19	`28fbcfa08d8e`
Tail call (`PROG_ARRAY`)	4.2	`04fd61ab36ec`
Perf events	4.3	`ea317b267e9d`
Per-CPU hash	4.6	`824bd0ce6c7c`
Per-CPU array	4.6	`a10423b87a7e`
Stack trace	4.6	`d5a3b1f69186`
Pre-alloc maps memory	4.6	`6c9059817432`
cgroup array	4.8	`4ed8ec521ed5`
LRU hash	4.10	`29ba732acbee` `3a08c2fd7634`
LRU per-CPU hash	4.10	`8f8449384ec3` `961578b63474`
LPM trie (longest-prefix match)	4.11	`b95a5c4db09b`
Array of maps	4.12	`56f668dfe00d`
Hash of maps	4.12	`bcc6b1b7ebf8`
Netdevice references	4.14	`546ac1ffb70d`
Socket references (array)	4.14	`174a79ff9515`
CPU references	4.15	`6710e1126934`
AF_XDP socket (XSK) references	4.18	`fbfc504a24f5`
Socket references (hashmap)	4.18	`81110384441a`
cgroup storage	4.19	`de9cbbaadba5`
reuseport sockarray	4.19	`5dc4c4b7d4e8`
precpu cgroup storage	4.20	`b741f1630346`
queue	4.20	`f1a2e44a3aec`
stack	4.20	`f1a2e44a3aec`

XDP

An approximate list of drivers or components supporting XDP programs for your kernel can be retrieved with:

git grep -l XDP_SETUP_PROG drivers/

Feature / Driver	Kernel version	Commit
XDP core architecture	4.8	`6a773a15a1e8`
Action: drop	4.8	`6a773a15a1e8`
Action: pass on to stack	4.8	`6a773a15a1e8`
Action: direct forwarding (on same port)	4.8	`6ce96ca348a9`
Direct packet data write	4.8	`4acf6c0b84c9`
Mellanox `mlx4` driver	4.8	`47a38e155037`
Mellanox `mlx5` driver	4.9	`86994156c736`
Netronome `nfp` driver	4.10	`ecd63a0217d5`
QLogic (Cavium) `qed*` drivers	4.10	`496e05170958`
`virtio_net` driver	4.10	`f600b6905015`
Broadcom `bnxt_en` driver	4.11	`c6d30e8391b8`
Intel `ixgbe*` drivers	4.12	`924708081629`
Cavium `thunderx` driver	4.12	`05c773f52b96`
Generic XDP	4.12	`b5cdae3291f7`
Intel `i40e` driver	4.13	`0c8493d90b6b`
Action: redirect	4.14	`6453073987ba`
Support for tap	4.14	`761876c857cb`
Support for veth	4.14	`d445516966dc`
Intel `e1000` driver		Not upstream yet
Intel `e1000e` driver		Not planned for upstream at this time

Helpers

The list of helpers supported in your kernel can be found in file include/uapi/linux/bpf.h:

git grep '	FN(' include/uapi/linux/bpf.h

Alphabetical order

Helper	Kernel version	License	Commit
`BPF_FUNC_bind()`	4.17		`d74bad4e74ee`
`BPF_FUNC_clone_redirect()`	4.2		`3896d655f4d4`
`BPF_FUNC_csum_diff()`	4.6		`7d672345ed29`
`BPF_FUNC_csum_update()`	4.9		`36bbef52c7eb`
`BPF_FUNC_current_task_under_cgroup()`	4.9		`60d20f9195b2`
`BPF_FUNC_fib_lookup()`	4.18	GPL	`87f5fc7e48dd`
`BPF_FUNC_get_cgroup_classid()`	4.3		`8d20aabe1c76`
`BPF_FUNC_get_current_cgroup_id()`	4.18		`bf6fa2c893c5`
`BPF_FUNC_get_current_comm()`	4.2		`ffeedafbf023`
`BPF_FUNC_get_current_pid_tgid()`	4.2		`ffeedafbf023`
`BPF_FUNC_get_current_task()`	4.8	GPL	`606274c5abd8`
`BPF_FUNC_get_current_uid_gid()`	4.2		`ffeedafbf023`
`BPF_FUNC_get_hash_recalc()`	4.8		`13c5c240f789`
`BPF_FUNC_get_local_storage()`	4.19		`cd3394317653`
`BPF_FUNC_get_numa_node_id()`	4.10		`2d0e30c30f84`
`BPF_FUNC_get_prandom_u32()`	4.1		`03e69b508b6f`
`BPF_FUNC_get_route_realm()`	4.4		`c46646d0484f`
`BPF_FUNC_get_smp_processor_id()`	4.1		`c04167ce2ca0`
`BPF_FUNC_get_socket_cookie()`	4.12		`91b8270f2a4d`
`BPF_FUNC_get_socket_uid()`	4.12		`6acc5c291068`
`BPF_FUNC_get_stack()`	4.18	GPL	`de2ff05f48af`
`BPF_FUNC_get_stackid()`	4.6	GPL	`d5a3b1f69186`
`BPF_FUNC_getsockopt()`	4.15		`cd86d1fd2102`
`BPF_FUNC_ktime_get_ns()`	4.1	GPL	`d9847d310ab4`
`BPF_FUNC_l3_csum_replace()`	4.1		`91bc4822c3d6`
`BPF_FUNC_l4_csum_replace()`	4.1		`91bc4822c3d6`
`BPF_FUNC_lwt_push_encap()`	4.18		`fe94cc290f53`
`BPF_FUNC_lwt_seg6_action()`	4.18		`fe94cc290f53`
`BPF_FUNC_lwt_seg6_adjust_srh()`	4.18		`fe94cc290f53`
`BPF_FUNC_lwt_seg6_store_bytes()`	4.18		`fe94cc290f53`
`BPF_FUNC_map_delete_elem()`	3.19		`d0003ec01c66`
`BPF_FUNC_map_lookup_elem()`	3.19		`d0003ec01c66`
`BPF_FUNC_map_peek_elem()`	3.20		`f1a2e44a3aec`
`BPF_FUNC_map_pop_elem()`	3.20		`f1a2e44a3aec`
`BPF_FUNC_map_push_elem()`	3.20		`f1a2e44a3aec`
`BPF_FUNC_map_update_elem()`	3.19		`d0003ec01c66`
`BPF_FUNC_msg_apply_bytes()`	4.17		`2a100317c9eb`
`BPF_FUNC_msg_cork_bytes()`	4.17		`91843d540a13`
`BPF_FUNC_msg_pull_data()`	4.17		`015632bb30da`
`BPF_FUNC_msg_push_data()`	4.20		`6fff607e2f14`
`BPF_FUNC_msg_redirect_hash()`	4.18		`81110384441a`
`BPF_FUNC_msg_redirect_map()`	4.17		`4f738adba30a`
`BPF_FUNC_perf_event_output()`	4.4	GPL	`a43eec304259`
`BPF_FUNC_perf_event_read()`	4.3	GPL	`35578d798400`
`BPF_FUNC_perf_event_read_value()`	4.15	GPL	`908432ca84fc`
`BPF_FUNC_perf_prog_read_value()`	4.15	GPL	`4bebdc7a85aa`
`BPF_FUNC_probe_read()`	4.1	GPL	`2541517c32be`
`BPF_FUNC_probe_read_str()`	4.11	GPL	`a5e8c07059d0`
`BPF_FUNC_probe_write_user()`	4.8	GPL	`96ae52279594`
`BPF_FUNC_rc_keydown()`	4.18	GPL	`f4364dcfc86d`
`BPF_FUNC_rc_repeat()`	4.18	GPL	`f4364dcfc86d`
`BPF_FUNC_redirect()`	4.4		`27b29f63058d`
`BPF_FUNC_redirect_map()`	4.14		`97f91a7cf04f`
`BPF_FUNC_set_hash()`	4.13		`ded092cd73c2`
`BPF_FUNC_set_hash_invalid()`	4.9		`7a4b28c6cc9f`
`BPF_FUNC_setsockopt()`	4.13		`8c4b4c7e9ff0`
`BPF_FUNC_sk_lookup_tcp()`	4.20		`6acc9b432e67`
`BPF_FUNC_sk_lookup_udp()`	4.20		`6acc9b432e67`
`BPF_FUNC_sk_redirect_hash()`	4.18		`81110384441a`
`BPF_FUNC_sk_redirect_map()`	4.14		`174a79ff9515`
`BPF_FUNC_sk_release()`	4.20		`6acc9b432e67`
`BPF_FUNC_sk_select_reuseport()`	4.19		`2dbb9b9e6df6`
`BPF_FUNC_skb_adjust_room()`	4.13		`2be7e212d541`
`BPF_FUNC_skb_ancestor_cgroup_id()`	4.19		`7723628101aa`
`BPF_FUNC_skb_change_head()`	4.10		`3a0af8fd61f9`
`BPF_FUNC_skb_change_proto()`	4.8		`6578171a7ff0`
`BPF_FUNC_skb_change_tail()`	4.9		`5293efe62df8`
`BPF_FUNC_skb_change_type()`	4.8		`d2485c4242a8`
`BPF_FUNC_skb_cgroup_id()`	4.18		`cb20b08ead40`
`BPF_FUNC_skb_get_tunnel_key()`	4.3		`d3aa45ce6b94`
`BPF_FUNC_skb_get_tunnel_opt()`	4.6		`14ca0751c96f`
`BPF_FUNC_skb_get_xfrm_state()`	4.18		`12bed760a78d`
`BPF_FUNC_skb_load_bytes()`	4.5		`05c74e5e53f6`
`BPF_FUNC_skb_load_bytes_relative()`	4.18		`4e1ec56cdc59`
`BPF_FUNC_skb_pull_data()`	4.9		`36bbef52c7eb`
`BPF_FUNC_skb_set_tunnel_key()`	4.3		`d3aa45ce6b94`
`BPF_FUNC_skb_set_tunnel_opt()`	4.6		`14ca0751c96f`
`BPF_FUNC_skb_store_bytes()`	4.1		`91bc4822c3d6`
`BPF_FUNC_skb_under_cgroup()`	4.8		`4a482f34afcc`
`BPF_FUNC_skb_vlan_pop()`	4.3		`4e10df9a60d9`
`BPF_FUNC_skb_vlan_push()`	4.3		`4e10df9a60d9`
`BPF_FUNC_sock_hash_update()`	4.18		`81110384441a`
`BPF_FUNC_sock_map_update()`	4.14		`174a79ff9515`
`BPF_FUNC_tail_call()`	4.2		`04fd61ab36ec`
`BPF_FUNC_trace_printk()`	4.1	GPL	`9c959c863f82`
`BPF_FUNC_xdp_adjust_head()`	4.10		`17bedab27231`
`BPF_FUNC_xdp_adjust_meta()`	4.15		`de8f3a83b0a0`
`BPF_FUNC_xdp_adjust_tail()`	4.18		`b32cc5b9a346`
`BPF_FUNC_override_return()`	4.16	GPL	`9802d86585db`
`BPF_FUNC_sock_ops_cb_flags_set()`	4.16		`b13d88072172`

Note: GPL-only BPF helpers require a GPL-compatible license. The current licenses considered GPL-compatible by the kernel are:

GPL
GPL v2
GPL and additional rights
Dual BSD/GPL
Dual MIT/GPL
Dual MPL/GPL

Check the list of GPL-compatible licenses in your kernel source code.

Program Types

The list of program types and supported helper functions can be retrieved with:

git grep -W 'func_proto(enum bpf_func_id func_id' kernel/ net/ drivers/

Program Type	Helper Functions
`BPF_PROG_TYPE_SOCKET_FILTER`	`BPF_FUNC_get_current_uid_gid()` `Base functions`
`BPF_PROG_TYPE_KPROBE`	`BPF_FUNC_perf_event_output()` `BPF_FUNC_get_stackid()` `BPF_FUNC_get_stack()` `BPF_FUNC_perf_event_read_value()` `BPF_FUNC_override_return()` `Tracing functions`
`BPF_PROG_TYPE_SCHED_CLS` `BPF_PROG_TYPE_SCHED_ACT`	`BPF_FUNC_skb_store_bytes()` `BPF_FUNC_skb_load_bytes()` `BPF_FUNC_skb_load_bytes_relative()` `BPF_FUNC_skb_pull_data()` `BPF_FUNC_csum_diff()` `BPF_FUNC_csum_update()` `BPF_FUNC_l3_csum_replace()` `BPF_FUNC_l4_csum_replace()` `BPF_FUNC_clone_redirect()` `BPF_FUNC_get_cgroup_classid()` `BPF_FUNC_skb_vlan_push()` `BPF_FUNC_skb_vlan_pop()` `BPF_FUNC_skb_change_proto()` `BPF_FUNC_skb_change_type()` `BPF_FUNC_skb_adjust_room()` `BPF_FUNC_skb_change_tail()` `BPF_FUNC_skb_get_tunnel_key()` `BPF_FUNC_skb_set_tunnel_key()` `BPF_FUNC_skb_get_tunnel_opt()` `BPF_FUNC_skb_set_tunnel_opt()` `BPF_FUNC_redirect()` `BPF_FUNC_get_route_realm()` `BPF_FUNC_get_hash_recalc()` `BPF_FUNC_set_hash_invalid()` `BPF_FUNC_set_hash()` `BPF_FUNC_perf_event_output()` `BPF_FUNC_get_smp_processor_id()` `BPF_FUNC_skb_under_cgroup()` `BPF_FUNC_get_socket_cookie()` `BPF_FUNC_get_socket_uid()` `BPF_FUNC_fib_lookup()` `BPF_FUNC_skb_get_xfrm_state()` `BPF_FUNC_skb_cgroup_id()` `Base functions`
`BPF_PROG_TYPE_TRACEPOINT`	`BPF_FUNC_perf_event_output()` `BPF_FUNC_get_stackid()` `BPF_FUNC_get_stack()` `Tracing functions`
`BPF_PROG_TYPE_XDP`	`BPF_FUNC_perf_event_output()` `BPF_FUNC_get_smp_processor_id()` `BPF_FUNC_csum_diff()` `BPF_FUNC_xdp_adjust_head()` `BPF_FUNC_xdp_adjust_meta()` `BPF_FUNC_redirect()` `BPF_FUNC_redirect_map()` `BPF_FUNC_xdp_adjust_tail()` `BPF_FUNC_fib_lookup()` `Base functions`
`BPF_PROG_TYPE_PERF_EVENT`	`BPF_FUNC_perf_event_output()` `BPF_FUNC_get_stackid()` `BPF_FUNC_get_stack()` `BPF_FUNC_perf_prog_read_value()` `Tracing functions`
`BPF_PROG_TYPE_CGROUP_SKB`	`BPF_FUNC_skb_load_bytes()` `BPF_FUNC_skb_load_bytes_relative()` `BPF_FUNC_get_socket_cookie()` `BPF_FUNC_get_socket_uid()` `Base functions`
`BPF_PROG_TYPE_CGROUP_SOCK`	`BPF_FUNC_get_current_uid_gid()` `Base functions`
`BPF_PROG_TYPE_LWT_IN`	`BPF_FUNC_lwt_push_encap()` `LWT functions` `Base functions`
`BPF_PROG_TYPE_LWT_OUT`	`LWT functions` `Base functions`
`BPF_PROG_TYPE_LWT_XMIT`	`BPF_FUNC_skb_get_tunnel_key()` `BPF_FUNC_skb_set_tunnel_key()` `BPF_FUNC_skb_get_tunnel_opt()` `BPF_FUNC_skb_set_tunnel_opt()` `BPF_FUNC_redirect()` `BPF_FUNC_clone_redirect()` `BPF_FUNC_skb_change_tail()` `BPF_FUNC_skb_change_head()` `BPF_FUNC_skb_store_bytes()` `BPF_FUNC_csum_update()` `BPF_FUNC_l3_csum_replace()` `BPF_FUNC_l4_csum_replace()` `BPF_FUNC_set_hash_invalid()` `LWT functions`
`BPF_PROG_TYPE_SOCK_OPS`	`BPF_FUNC_setsockopt()` `BPF_FUNC_getsockopt()` `BPF_FUNC_sock_ops_cb_flags_set()` `BPF_FUNC_sock_map_update()` `BPF_FUNC_sock_hash_update()` `BPF_FUNC_get_socket_cookie()` `Base functions`
`BPF_PROG_TYPE_SK_SKB`	`BPF_FUNC_skb_store_bytes()` `BPF_FUNC_skb_load_bytes()` `BPF_FUNC_skb_pull_data()` `BPF_FUNC_skb_change_tail()` `BPF_FUNC_skb_change_head()` `BPF_FUNC_get_socket_cookie()` `BPF_FUNC_get_socket_uid()` `BPF_FUNC_sk_redirect_map()` `BPF_FUNC_sk_redirect_hash()` `BPF_FUNC_sk_lookup_tcp()` `BPF_FUNC_sk_lookup_udp()` `BPF_FUNC_sk_release()` `Base functions`
`BPF_PROG_TYPE_CGROUP_DEVICE`	`BPF_FUNC_map_lookup_elem()` `BPF_FUNC_map_update_elem()` `BPF_FUNC_map_delete_elem()` `BPF_FUNC_get_current_uid_gid()` `BPF_FUNC_trace_printk()`
`BPF_PROG_TYPE_SK_MSG`	`BPF_FUNC_msg_redirect_map()` `BPF_FUNC_msg_redirect_hash()` `BPF_FUNC_msg_apply_bytes()` `BPF_FUNC_msg_cork_bytes()` `BPF_FUNC_msg_pull_data()` `BPF_FUNC_msg_push_data()` `Base functions`
`BPF_PROG_TYPE_RAW_TRACEPOINT`	`BPF_FUNC_perf_event_output()` `BPF_FUNC_get_stackid()` `BPF_FUNC_get_stack()` `Tracing functions`
`BPF_PROG_TYPE_CGROUP_SOCK_ADDR`	`BPF_FUNC_get_current_uid_gid()` `BPF_FUNC_bind()` `BPF_FUNC_get_socket_cookie()` `Base functions`
`BPF_PROG_TYPE_LWT_SEG6LOCAL`	`BPF_FUNC_lwt_seg6_store_bytes()` `BPF_FUNC_lwt_seg6_action()` `BPF_FUNC_lwt_seg6_adjust_srh()` `LWT functions`
`BPF_PROG_TYPE_LIRC_MODE2`	`BPF_FUNC_rc_repeat()` `BPF_FUNC_rc_keydown()` `BPF_FUNC_map_lookup_elem()` `BPF_FUNC_map_update_elem()` `BPF_FUNC_map_delete_elem()` `BPF_FUNC_ktime_get_ns()` `BPF_FUNC_tail_call()` `BPF_FUNC_get_prandom_u32()` `BPF_FUNC_trace_printk()`
`BPF_PROG_TYPE_SK_REUSEPORT`	`BPF_FUNC_sk_select_reuseport()` `BPF_FUNC_skb_load_bytes()` `BPF_FUNC_load_bytes_relative()` `Base functions`
`BPF_PROG_TYPE_FLOW_DISSECTOR`	`BPF_FUNC_skb_load_bytes()` `Base functions`

Function Group	Functions
`Base functions`	`BPF_FUNC_map_lookup_elem()` `BPF_FUNC_map_update_elem()` `BPF_FUNC_map_delete_elem()` `BPF_FUNC_map_peek_elem()` `BPF_FUNC_map_pop_elem()` `BPF_FUNC_map_push_elem()` `BPF_FUNC_get_prandom_u32()` `BPF_FUNC_get_smp_processor_id()` `BPF_FUNC_get_numa_node_id()` `BPF_FUNC_tail_call()` `BPF_FUNC_ktime_get_ns()` `BPF_FUNC_trace_printk()`
`Tracing functions`	`BPF_FUNC_map_lookup_elem()` `BPF_FUNC_map_update_elem()` `BPF_FUNC_map_delete_elem()` `BPF_FUNC_probe_read()` `BPF_FUNC_ktime_get_ns()` `BPF_FUNC_tail_call()` `BPF_FUNC_get_current_pid_tgid()` `BPF_FUNC_get_current_task()` `BPF_FUNC_get_current_uid_gid()` `BPF_FUNC_get_current_comm()` `BPF_FUNC_trace_printk()` `BPF_FUNC_get_smp_processor_id()` `BPF_FUNC_get_numa_node_id()` `BPF_FUNC_perf_event_read()` `BPF_FUNC_probe_write_user()` `BPF_FUNC_current_task_under_cgroup()` `BPF_FUNC_get_prandom_u32()` `BPF_FUNC_probe_read_str()` `BPF_FUNC_get_current_cgroup_id()`
`LWT functions`	`BPF_FUNC_skb_load_bytes()` `BPF_FUNC_skb_pull_data()` `BPF_FUNC_csum_diff()` `BPF_FUNC_get_cgroup_classid()` `BPF_FUNC_get_route_realm()` `BPF_FUNC_get_hash_recalc()` `BPF_FUNC_perf_event_output()` `BPF_FUNC_get_smp_processor_id()` `BPF_FUNC_skb_under_cgroup()`