diff options
Diffstat (limited to 'tools/bpf/bpftool/Documentation/bpftool-prog.rst')
| -rw-r--r-- | tools/bpf/bpftool/Documentation/bpftool-prog.rst | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/tools/bpf/bpftool/Documentation/bpftool-prog.rst b/tools/bpf/bpftool/Documentation/bpftool-prog.rst index ab36e920e552..5524b6dccd85 100644 --- a/tools/bpf/bpftool/Documentation/bpftool-prog.rst +++ b/tools/bpf/bpftool/Documentation/bpftool-prog.rst @@ -26,8 +26,9 @@ MAP COMMANDS | **bpftool** **prog dump jited** *PROG* [{**file** *FILE* | **opcodes**}] | **bpftool** **prog pin** *PROG* *FILE* | **bpftool** **prog { load | loadall }** *OBJ* *PATH* [**type** *TYPE*] [**map** {**idx** *IDX* | **name** *NAME*} *MAP*] [**dev** *NAME*] -| **bpftool** **prog attach** *PROG* *ATTACH_TYPE* [*MAP*] -| **bpftool** **prog detach** *PROG* *ATTACH_TYPE* [*MAP*] +| **bpftool** **prog attach** *PROG* *ATTACH_TYPE* [*MAP*] +| **bpftool** **prog detach** *PROG* *ATTACH_TYPE* [*MAP*] +| **bpftool** **prog tracelog** | **bpftool** **prog help** | | *MAP* := { **id** *MAP_ID* | **pinned** *FILE* } @@ -117,6 +118,14 @@ DESCRIPTION parameter, with the exception of *flow_dissector* which is detached from the current networking name space. + **bpftool prog tracelog** + Dump the trace pipe of the system to the console (stdout). + Hit <Ctrl+C> to stop printing. BPF programs can write to this + trace pipe at runtime with the **bpf_trace_printk()** helper. + This should be used only for debugging purposes. For + streaming data from BPF programs to user space, one can use + perf events (see also **bpftool-map**\ (8)). + **bpftool prog help** Print short help message. |