4 -------------------------------------------------------------------------------
5 tool for inspection and simple manipulation of eBPF progs
6 -------------------------------------------------------------------------------
13 **bpftool** [*OPTIONS*] **prog** *COMMAND*
15 *OPTIONS* := { { **-j** | **--json** } [{ **-p** | **--pretty** }] | { **-f** | **--bpffs** } }
18 { **show** | **list** | **dump xlated** | **dump jited** | **pin** | **load** | **help** }
23 | **bpftool** **prog { show | list }** [*PROG*]
24 | **bpftool** **prog dump xlated** *PROG* [{**file** *FILE* | **opcodes** | **visual**}]
25 | **bpftool** **prog dump jited** *PROG* [{**file** *FILE* | **opcodes**}]
26 | **bpftool** **prog pin** *PROG* *FILE*
27 | **bpftool** **prog load** *OBJ* *FILE* [**type** *TYPE*] [**map** {**idx** *IDX* | **name** *NAME*} *MAP*] [**dev** *NAME*]
28 | **bpftool** **prog help**
30 | *MAP* := { **id** *MAP_ID* | **pinned** *FILE* }
31 | *PROG* := { **id** *PROG_ID* | **pinned** *FILE* | **tag** *PROG_TAG* }
33 | **socket** | **kprobe** | **kretprobe** | **classifier** | **action** |
34 | **tracepoint** | **raw_tracepoint** | **xdp** | **perf_event** | **cgroup/skb** |
35 | **cgroup/sock** | **cgroup/dev** | **lwt_in** | **lwt_out** | **lwt_xmit** |
36 | **lwt_seg6local** | **sockops** | **sk_skb** | **sk_msg** | **lirc_mode2** |
37 | **cgroup/bind4** | **cgroup/bind6** | **cgroup/post_bind4** | **cgroup/post_bind6** |
38 | **cgroup/connect4** | **cgroup/connect6** | **cgroup/sendmsg4** | **cgroup/sendmsg6**
44 **bpftool prog { show | list }** [*PROG*]
45 Show information about loaded programs. If *PROG* is
46 specified show information only about given program, otherwise
47 list all programs currently loaded on the system.
49 Output will start with program ID followed by program type and
50 zero or more named attributes (depending on kernel version).
52 **bpftool prog dump xlated** *PROG* [{ **file** *FILE* | **opcodes** | **visual** }]
53 Dump eBPF instructions of the program from the kernel. By
54 default, eBPF will be disassembled and printed to standard
55 output in human-readable format. In this case, **opcodes**
56 controls if raw opcodes should be printed as well.
58 If **file** is specified, the binary image will instead be
61 If **visual** is specified, control flow graph (CFG) will be
62 built instead, and eBPF instructions will be presented with
63 CFG in DOT format, on standard output.
65 **bpftool prog dump jited** *PROG* [{ **file** *FILE* | **opcodes** }]
66 Dump jited image (host machine code) of the program.
67 If *FILE* is specified image will be written to a file,
68 otherwise it will be disassembled and printed to stdout.
70 **opcodes** controls if raw opcodes will be printed.
72 **bpftool prog pin** *PROG* *FILE*
73 Pin program *PROG* as *FILE*.
75 Note: *FILE* must be located in *bpffs* mount.
77 **bpftool prog load** *OBJ* *FILE* [**type** *TYPE*] [**map** {**idx** *IDX* | **name** *NAME*} *MAP*] [**dev** *NAME*]
78 Load bpf program from binary *OBJ* and pin as *FILE*.
79 **type** is optional, if not specified program type will be
80 inferred from section names.
81 By default bpftool will create new maps as declared in the ELF
82 object being loaded. **map** parameter allows for the reuse
83 of existing maps. It can be specified multiple times, each
84 time for a different map. *IDX* refers to index of the map
85 to be replaced in the ELF file counting from 0, while *NAME*
86 allows to replace a map by name. *MAP* specifies the map to
87 use, referring to it by **id** or through a **pinned** file.
88 If **dev** *NAME* is specified program will be loaded onto
89 given networking device (offload).
91 Note: *FILE* must be located in *bpffs* mount.
94 Print short help message.
99 Print short generic help message (similar to **bpftool help**).
102 Print version number (similar to **bpftool version**).
105 Generate JSON output. For commands that cannot produce JSON, this
106 option has no effect.
109 Generate human-readable JSON output. Implies **-j**.
112 Show file names of pinned programs.
116 **# bpftool prog show**
119 10: xdp name some_prog tag 005a3d2123620c8b gpl
120 loaded_at Sep 29/20:11 uid 0
121 xlated 528B jited 370B memlock 4096B map_ids 10
123 **# bpftool --json --pretty prog show**
131 "tag": "005a3d2123620c8b",
132 "gpl_compatible": true,
133 "loaded_at": "Sep 29/20:11",
138 "bytes_memlock": 4096,
146 | **# bpftool prog dump xlated id 10 file /tmp/t**
148 | -rw------- 1 root root 560 Jul 22 01:42 /tmp/t
150 **# bpftool prog dum jited tag 005a3d2123620c8b**
161 | **# mount -t bpf none /sys/fs/bpf/**
162 | **# bpftool prog pin id 10 /sys/fs/bpf/prog**
163 | **# bpftool prog load ./my_prog.o /sys/fs/bpf/prog2**
164 | **# ls -l /sys/fs/bpf/**
165 | -rw------- 1 root root 0 Jul 22 01:43 prog
166 | -rw------- 1 root root 0 Jul 22 01:44 prog2
168 **# bpftool prog dum jited pinned /sys/fs/bpf/prog opcodes**
184 | **# bpftool prog load xdp1_kern.o /sys/fs/bpf/xdp1 type xdp map name rxcnt id 7**
185 | **# bpftool prog show pinned /sys/fs/bpf/xdp1**
186 | 9: xdp name xdp_prog1 tag 539ec6ce11b52f98 gpl
187 | loaded_at 2018-06-25T16:17:31-0700 uid 0
188 | xlated 488B jited 336B memlock 4096B map_ids 7
189 | **# rm /sys/fs/bpf/xdp1**
194 **bpftool**\ (8), **bpftool-map**\ (8), **bpftool-cgroup**\ (8)