diff options
Diffstat (limited to 'tools/bpf/bpftool/Documentation/bpftool-net.rst')
| -rw-r--r-- | tools/bpf/bpftool/Documentation/bpftool-net.rst | 112 |
1 files changed, 55 insertions, 57 deletions
diff --git a/tools/bpf/bpftool/Documentation/bpftool-net.rst b/tools/bpf/bpftool/Documentation/bpftool-net.rst index dd3f9469765b..43d2c858fdf8 100644 --- a/tools/bpf/bpftool/Documentation/bpftool-net.rst +++ b/tools/bpf/bpftool/Documentation/bpftool-net.rst @@ -14,76 +14,74 @@ tool for inspection of networking related bpf prog attachments SYNOPSIS ======== - **bpftool** [*OPTIONS*] **net** *COMMAND* +**bpftool** [*OPTIONS*] **net** *COMMAND* - *OPTIONS* := { |COMMON_OPTIONS| } +*OPTIONS* := { |COMMON_OPTIONS| } - *COMMANDS* := - { **show** | **list** | **attach** | **detach** | **help** } +*COMMANDS* := { **show** | **list** | **attach** | **detach** | **help** } NET COMMANDS ============ -| **bpftool** **net** { **show** | **list** } [ **dev** *NAME* ] -| **bpftool** **net attach** *ATTACH_TYPE* *PROG* **dev** *NAME* [ **overwrite** ] -| **bpftool** **net detach** *ATTACH_TYPE* **dev** *NAME* -| **bpftool** **net help** +| **bpftool** **net** { **show** | **list** } [ **dev** *NAME* ] +| **bpftool** **net attach** *ATTACH_TYPE* *PROG* **dev** *NAME* [ **overwrite** ] +| **bpftool** **net detach** *ATTACH_TYPE* **dev** *NAME* +| **bpftool** **net help** | -| *PROG* := { **id** *PROG_ID* | **pinned** *FILE* | **tag** *PROG_TAG* } -| *ATTACH_TYPE* := { **xdp** | **xdpgeneric** | **xdpdrv** | **xdpoffload** } +| *PROG* := { **id** *PROG_ID* | **pinned** *FILE* | **tag** *PROG_TAG* } +| *ATTACH_TYPE* := { **xdp** | **xdpgeneric** | **xdpdrv** | **xdpoffload** } DESCRIPTION =========== - **bpftool net { show | list }** [ **dev** *NAME* ] - List bpf program attachments in the kernel networking subsystem. - - Currently, device driver xdp attachments, tcx, netkit and old-style tc - classifier/action attachments, flow_dissector as well as netfilter - attachments are implemented, i.e., for - program types **BPF_PROG_TYPE_XDP**, **BPF_PROG_TYPE_SCHED_CLS**, - **BPF_PROG_TYPE_SCHED_ACT**, **BPF_PROG_TYPE_FLOW_DISSECTOR**, - **BPF_PROG_TYPE_NETFILTER**. - - For programs attached to a particular cgroup, e.g., - **BPF_PROG_TYPE_CGROUP_SKB**, **BPF_PROG_TYPE_CGROUP_SOCK**, - **BPF_PROG_TYPE_SOCK_OPS** and **BPF_PROG_TYPE_CGROUP_SOCK_ADDR**, - users can use **bpftool cgroup** to dump cgroup attachments. - For sk_{filter, skb, msg, reuseport} and lwt/seg6 - bpf programs, users should consult other tools, e.g., iproute2. - - The current output will start with all xdp program attachments, followed by - all tcx, netkit, then tc class/qdisc bpf program attachments, then flow_dissector - and finally netfilter programs. Both xdp programs and tcx/netkit/tc programs are - ordered based on ifindex number. If multiple bpf programs attached - to the same networking device through **tc**, the order will be first - all bpf programs attached to tcx, netkit, then tc classes, then all bpf programs - attached to non clsact qdiscs, and finally all bpf programs attached - to root and clsact qdisc. - - **bpftool** **net attach** *ATTACH_TYPE* *PROG* **dev** *NAME* [ **overwrite** ] - Attach bpf program *PROG* to network interface *NAME* with - type specified by *ATTACH_TYPE*. Previously attached bpf program - can be replaced by the command used with **overwrite** option. - Currently, only XDP-related modes are supported for *ATTACH_TYPE*. - - *ATTACH_TYPE* can be of: - **xdp** - try native XDP and fallback to generic XDP if NIC driver does not support it; - **xdpgeneric** - Generic XDP. runs at generic XDP hook when packet already enters receive path as skb; - **xdpdrv** - Native XDP. runs earliest point in driver's receive path; - **xdpoffload** - Offload XDP. runs directly on NIC on each packet reception; - - **bpftool** **net detach** *ATTACH_TYPE* **dev** *NAME* - Detach bpf program attached to network interface *NAME* with - type specified by *ATTACH_TYPE*. To detach bpf program, same - *ATTACH_TYPE* previously used for attach must be specified. - Currently, only XDP-related modes are supported for *ATTACH_TYPE*. - - **bpftool net help** - Print short help message. +**bpftool net { show | list }** [ **dev** *NAME* ] + List bpf program attachments in the kernel networking subsystem. + + Currently, device driver xdp attachments, tcx, netkit and old-style tc + classifier/action attachments, flow_dissector as well as netfilter + attachments are implemented, i.e., for program types **BPF_PROG_TYPE_XDP**, + **BPF_PROG_TYPE_SCHED_CLS**, **BPF_PROG_TYPE_SCHED_ACT**, + **BPF_PROG_TYPE_FLOW_DISSECTOR**, **BPF_PROG_TYPE_NETFILTER**. + + For programs attached to a particular cgroup, e.g., + **BPF_PROG_TYPE_CGROUP_SKB**, **BPF_PROG_TYPE_CGROUP_SOCK**, + **BPF_PROG_TYPE_SOCK_OPS** and **BPF_PROG_TYPE_CGROUP_SOCK_ADDR**, users + can use **bpftool cgroup** to dump cgroup attachments. For sk_{filter, skb, + msg, reuseport} and lwt/seg6 bpf programs, users should consult other + tools, e.g., iproute2. + + The current output will start with all xdp program attachments, followed by + all tcx, netkit, then tc class/qdisc bpf program attachments, then + flow_dissector and finally netfilter programs. Both xdp programs and + tcx/netkit/tc programs are ordered based on ifindex number. If multiple bpf + programs attached to the same networking device through **tc**, the order + will be first all bpf programs attached to tcx, netkit, then tc classes, + then all bpf programs attached to non clsact qdiscs, and finally all bpf + programs attached to root and clsact qdisc. + +**bpftool** **net attach** *ATTACH_TYPE* *PROG* **dev** *NAME* [ **overwrite** ] + Attach bpf program *PROG* to network interface *NAME* with type specified + by *ATTACH_TYPE*. Previously attached bpf program can be replaced by the + command used with **overwrite** option. Currently, only XDP-related modes + are supported for *ATTACH_TYPE*. + + *ATTACH_TYPE* can be of: + **xdp** - try native XDP and fallback to generic XDP if NIC driver does not support it; + **xdpgeneric** - Generic XDP. runs at generic XDP hook when packet already enters receive path as skb; + **xdpdrv** - Native XDP. runs earliest point in driver's receive path; + **xdpoffload** - Offload XDP. runs directly on NIC on each packet reception; + +**bpftool** **net detach** *ATTACH_TYPE* **dev** *NAME* + Detach bpf program attached to network interface *NAME* with type specified + by *ATTACH_TYPE*. To detach bpf program, same *ATTACH_TYPE* previously used + for attach must be specified. Currently, only XDP-related modes are + supported for *ATTACH_TYPE*. + +**bpftool net help** + Print short help message. OPTIONS ======= - .. include:: common_options.rst +.. include:: common_options.rst EXAMPLES ======== |